WO2000018113A1 - Television control system for universal control of hospital televisions - Google Patents

Abstract

A television control system for controlling different models of hospital televisions, has an input device (12) for receiving an input from a person, and a controller (16) for interfacing with hospital televisions. The controller (16) generates control signal clusters (80, 201) reflective of the input, and the clusters (80, 201) include a plurality of sequentially-generated, individual control signals for specific operational functions of a plurality of different models of hospital televisions.

Description

TELEVISION CONTROL SYSTEM FOR UNIVERSAL CONTROL OF HOSPITAL TELEVISIONS

Related Applications:

This application is a continuation-in-part of application Serial No.

08/853,532, entitled Television Control System for Universal Control of

Hospital Televisions, and filed May 9, 1997, which application is incorporated

completely herein by reference.

Field of the Invention:

This invention relates generally to hospital interfacing devices and

particularly to an interface device for controlling a television in a hospital

room.

Background of the Invention:

Televisions (TVs) manufactured for use in health care facilities, such

as within hospital rooms, are specifically designed for use within those

environments. In the past, such televisions have been designed to meet

certain requirements regarding safety and control. However, such hospital

TV control has always been subject to an informal control standard directed to the patient operation of the TVs from a hospital bed rail control or a pillow

speaker. The term "pillow speaker" is generally used to refer to a device

associated with a hospital bed which provides an audio speaker and volume

control for a television, along with capabilities for communicating with the

nurse, controlling lighting, and other such features. The pillow speaker is

generally a detached unit connected by a cord to the bed or to an interface

plug in the wall.

While available hospital TVs and their associated controls provide a

basic viewing experience, they suffer from several significant drawbacks.

Historically, the control of hospital TVs has been severely limited and has

generally consisted of a single button control which turns the television ON

and OFF and changes the channel. Separate volume control buttons are

used for raising or lowering the volume of the television. For example, such

TVs are turned ON by pressing the TV button. Then, each subsequent

depression of the TV button changes the channel UP to the next available

viewing channel. When all the available channels are displayed in sequence,

the television then turns OFF. Depressing the TV button again turns the

television back ON and prepares it again for moving UP through the

channels. The patient or other person controlling the TV can only progress

upwardly through the channels. If a desired channel is passed, the patient

has to progress all the way through the channel selections, has to turn the TV

OFF and then ON again, and finally has to move up slowly through the

channels, being careful to again not pass the desired channel. Furthermore, a patient cannot turn the TV OFF at a selected channel and then turn it back

ON at that channel. The TV always comes back ON at the same channel

and the patient has to again search for the channel they were previously viewing.

Such scenarios are not only frustrating and a waste of the patent's

time, but also may unduly and undesirably aggravate the patient, whose

health may not be at its best. While such control may have been at least

sufficient when only a few channels were available for viewing, the latest TV

technology requires additional control for accessing a large number of

additional channels and operating an expanded set of TV features and

functions. For example, it is desirable to turn the television ON and OFF and

have it remain at the channel which was last selected. Furthermore, it is

desirable to move UP or DOWN through the available channels at random.

Still further, it is desirable to access a number of other TV features, such as

display menus or channel viewing guides. Newly available hospital TVs,

often referred to as code-driven TVs, are capable of being functionally

controlled as desired and discussed above. However, current hospital TV

control technology is usually only able to provide the limited control that has

traditionally been available with a hospital TV and often cannot take full

advantage of the code-driven TV technology.

Another significant drawback of available hospital TV control

technology is that each bed and pillow speaker associated with the bed must

be configured to control a specific brand/model of hospital TV. There are currently at least three major manufacturers of hospital TVS. To control a

specific TV brand/model from a hospital bed and pillow speaker, the bed and

pillow speaker have to be specially manufactured and configured for that TV

model.

As such, a hospital or other health care facility has to know which beds

are going to go with which TV models, and the manufacturer of the beds has

to tailor and configure the bed operation for the specific TV model.

Oftentimes, such configuration is required in the field, which further increases

the manufacturing costs associated with each bed. After the beds and TVs

are installed, a bed cannot be moved to a room having a different TV model

than the one for which it is manufactured and configured. Otherwise, the TV

cannot be controlled from the bed. As may be appreciated, this presents

significant logistical problems for the hospital in setting up a hospital room.

Furthermore, it presents delays in implementing a bed into a room, because

if the bed and TV do not communicate, then the hospital has to obtain a

different bed, or a different TV model or has to have the bed reconfigured for

the specific TV model available.

The present hospital TV control scenario is also unsuitable for hospital

bed manufacturing. Manufacturers have to keep different beds in inventory,

or have to specifically tailor or retrofit each bed to the customer's TV

demands. Such retrofitting is often done by the bed manufacturer in the field.

This is not only costly in the way of increased inventory costs and post production modifications, but it also creates another issue for manufacturers'

Customer Service Departments to handle.

Furthermore, not only do the above problems and drawbacks arise

when a new hospital room is being set up, but they will again occur if there

is a malfunction in the bed, in the TV, or both. Replacement beds or TVs

cannot simply be taken from other rooms unless the hospital only has one

type of bed and one model of television.

Any solution to the above drawbacks in current TV control technology

must not only take into account the newer code-driven hospital TVs, but must

also be compatible with older TVs that will probably remain in a particular

hospital until they malfunction or the hospital makes a determination to

upgrade to newer TVs. Given the interest in rising health care costs, the

former situation may occur before the latter.

Radio capabilities are also usually available with some hospital TVs.

In the past, the bed rails and pillow speakers have had separate, generally

single button, RADIO controls for turning the radio ON and OFF and

changing the radio channels. Furthermore, radio control was limited like the

TV control. Therefore, any suitable solutions to the drawbacks of the current

TV control technology should also be capable of utilizing available radio

features of a television, whether an older TV model or a newer, code-driven

model.

One solution to the aforementioned problems in the prior art, is

addressed by U.S. patent application, Serial No. 08/853,532, referenced above, wherein a television control system for universal control of hospital

televisions is provided, addressing the problems associated with various TV

models from different manufacturers, as well as scenarios wherein a hospital

will include both older and newer televisions. Specifically, the television

control system utilizes various operational modes for adapting the system to

a variety of different situations. For example, the inventive system may be

adapted to hospitals containing both old and newer TVs, to hospitals

containing only newer TVs and/or to hospitals containing only old TVs.

Furthermore, the system may be adapted, through mode selection, to

address a number of other possible scenarios within a hospital. While such

mode selection is desirable and the inventive system addresses the problems

in the prior art, it requires proper switch selection for the desired mode upon

installation. Accordingly, the proper switch selection requires an individual

to recognize which TVs are in use within a particular room or within a

particular hospital or medical facility. Such a determination may slow the

installation procedure.

Furthermore, the previously mentioned system, in one embodiment,

relies upon patient operation of the various input buttons to switch between

sub-modes. It has been determined that such a process for selecting a mode

could sometimes lead to the inadvertent selection of control for an older style

TV when control of a newer TV is actually desired, or vice versa. Such mode

selection would rely upon all users intuitively operating the system in the same manner. In the worse scenario, the various submodes of the system

might be changed inadvertently and undesirably.

Accordingly, it is an objective of the present invention to address the

drawbacks in available hospital TV control scenarios, and to provide an

improved TV control system for medical and health care facilities, such as

hospitals.

It is a further objective of the present invention to provide a TV control

system which adapts to TV models from a variety of different manufacturers.

It is still a further objective of the present invention to have a bed-

dedicated TV control unit and bed which may be moved between areas in the

hospital without being dependent upon the model of TV with which it is

interfaced.

It is another objective of the present invention to provide expandability

of TV control functions in a hospital for easily accessing additional channels

and addressing additional features available with current TV technology.

It is still a further objective to provide expanded control capabilities for

newer hospital TVs while at the same time maintaining compatibility with

older TVs which are currently in place in various hospitals.

It is another objective of the invention to improve upon the existing

inventive control system which addresses the above objectives and to

specifically reduce or eliminate manual switching or patient control for

operation of various older and newer style TVs with the system. It is another objective to provide suitable radio control within the TV control system.

These and other objectives will become more readily apparent from

the Summary of the Invention, Brief Description of the Drawings, and

Detailed Description of the Invention, below.

Summary of the Invention:

The present invention addresses the above-discussed drawbacks of

the prior art and meets the objectives set forth above and other objectives by

providing a TV control system which universally controls different models of

hospital TVs. In that way, a bed, or pillow speaker, which is outfitted with the

invention may be utilized with any one of a number of different hospital TV

models from different manufacturers without having to be specially designed

or configured for a particular TV model. The television control system allows

a bed or pillow speaker to be moved between areas in the hospital without

being dependent upon the model of TV with which it is interfaced. The

inventive system further provides expanded functional capability for

controlling a hospital TV while maintaining compatibility with older TVs and

providing for suitable radio control of radio functions available on a particular

TV model. By providing universal control of different TV models, the

invention reduces the logistical problems between hospital and bed

manufacturers when ordering, manufacturing, and installing hospital beds.

Furthermore, the invention gives a hospital greater flexibility in moving and

replacing hospital beds and hospital TVs. Manufacturers do not have to maintain a large inventory of different beds configured for specific TV models,

thus reducing inventory costs and post production costs associated with

retrofitting or configuring beds in the field for specific TV control.

Furthermore, the invention gives a patient greater flexibility and control of the

TV and eliminates the inconveniences and irritations associated with prior hospital TV systems.

To that end, the TV control system of the invention comprises an input

device which is operable for interfacing with a person to receive an input, and

is further operable for generating an input signal corresponding to the input.

The input device may be in the form of buttons or switches on the side rail of

a hospital bed or may be incorporated into the control buttons or switches of

a pillow speaker associated with the bed. The input device essentially

provides an indication to the patient of the type of control available for the

hospital TV and possibly a radio system associated therewith. The system

further comprises a controller which is configured for interfacing with the

hospital TV. The controller is operable for generating the necessary control

signals to operate different models of hospital TVs. The controller not only

provides control signals for newer code-driven TVs, but is still capable of

controlling older TVs which are in place in existing hospital facilities. The

controller is operably coupled to the input device to receive one of a plurality

of available input signals, such as an input from the patient to turn the

television ON or OFF or to change channels. In accordance with the principles of the present invention, the

controller is operable for generating a control signal cluster reflective of the

input signal to control the TV as desired by the patient. The control signal

cluster includes a plurality of sequentially generated, individual control

signals, which are sent one after the other. Each of the control signals

corresponds to a specific operational function for a plurality of different

models of hospital TVs. Therefore, the sequentially generated control signals

of each cluster reflect the desired operational function of the patient.

For example, when the patient pushes the TV ON button, the

controller of the inventive system generates a control signal cluster which has

a plurality of sequentially generated ON commands, one ON command for

each TV of a plurality of different models of hospital TVs which may be

coupled to the system. That is, if the system is configured for controlling

television Model A, Model B, and Model C, each from different

manufacturers, then the inventive system provides a control signal cluster

including ON signals for Model A, Model B, and Model C for turning the TV

on. The sequentially generated ON signals proceed one after the other. If

the bed containing the inventive system is coupled with a Model B TV, then

the TV will simply ignore the ON control signals for Model A and Model C,

and will respond to the Model B signal by turning itself on. Since the control

signal cluster includes sequentially generated control signals for a plurality

of different models of hospital TVs, then the bed and inventive control system

may be moved to a room with a different TV model, such as a Model A TV, and the control system will be able to properly operate that model as well

without any reconfiguration of the control system.

Preferably, a particular input signal will produce a control signal cluster

which corresponds to the same operational function for each TV model with

which the system might be interfaced. For example, an ON input from the

patient will generate a cluster of only ON signals for the TVs. However, in

accordance with another principle of the present invention, the cluster might

include individual control signals for different operational functions. For

example, for one TV model, the cluster may include control signals to provide

radio features from the TV, while for another TV model, and within the same

cluster, the control signal might operate the TV to provide a channel guide

showing the available viewing channels. It will be appreciated by a person

of ordinary skill in the art, that other features might be included in a cluster

depending upon the operational functions of the available TV models.

In one embodiment of the invention, inputs are provided for turning the

television ON/OFF, for moving the viewing channel UP, and for moving the

viewing channel DOWN, while another button corresponds to a SELECT or

RADIO feature of the TV model. The ON/OFF, UP, and DOWN, are the

basic functions which most patients will utilize when operating a hospital

television. However, it will be appreciated that other operational functions

may be utilized and thus the input device may provide the appropriate

switches or buttons to access those additional functions. The present invention is capable of operating newer, code-driven TVs,

and is also capable of operating older TVs under the older command

protocol. To that end, one embodiment of the present invention operates in

a variety of different modes depending upon whether old TVs, newer code-

driven TVs, or a combination of both are to be encountered by a bed which

is outfitted with the inventive control system. To that end, the invention

comprises a mode switch which is coupled to the main processor of the

system for determining the selected mode. The mode switch may be utilized

to set the system into a particular mode depending upon the installation

parameters and the TVs available.

In another embodiment of the invention, a mode switch and different

selectable modes are eliminated. In the alternative embodiment, the

invention takes advantage of the backward compatibility of newer TVs which

are compatible to the older command protocol, so that the newer TVs may

be installed in hospitals where only the older command protocol is available.

To that end, the control signal cluster, which is generated in accordance with

the principles of the present invention, may include the command signals for

the older protocol, as well as the new control signals for the newer TVs.

Specifically, the cluster initially includes control signals for the newer TVs,

and if the TV does not respond, a data stream for operating an older TV is

added to the cluster. In that way, the older TVs are essentially handled as

if they were a TV from another manufacturer. Furthermore, no mode

switching or mode selection is necessary by either the installer or a patient utilizing the inventive system. In such an alternative embodiment, the

backward compatibility of newer TVs is also taken into account, so that a

selected function, such a CHANNEL UP function, is always generated under

the older command protocol. All TVs, older and newer, will recognize certain

function control signals, such as a CHANNEL UP control signal, based upon

the older command protocol. Preferably, in accordance with such an

alternative embodiment, the cluster of control signals is repeated at regular

intervals if a particular input is repeatedly engaged and the individual control

signals are appropriately separated by time delay intervals to allow correlated

functions to occur at a similar rate. For example, the CHANNEL UP control

signals and CHANNEL DOWN control signals are repeated at the same

intervals so that the channels may be scrolled up and down at generally the

same rate.

In one embodiment of the invention, the controller utilizes a plurality

of relays to generate the control signal cluster. The relays are coupled to the

system processor, and they are opened and closed as directed by the

processor to form a series or string of spaced pulses which create the

specific control signals for a particular TV model. Through selective

operation of the relays, the control signals, and control signal clusters are

created as necessary for operating a hospital TV. The relays are also bi¬

directional and not sensitive to polarity errors that may occur upon installation

of the system. The features and advantages of the invention will become further apparent from the Brief Description of Drawings and the Detailed Description of the Invention below.

Brief Description of the Drawings:

Figure 1 is a block diagram of an embodiment of the Universal

Television Control System of the present invention;

Figure 2 is a circuit schematic of the System in Figure 1 ;

Figure 3 is a flow chart illustrating the operation of one embodiment

of the inventive system;

Figure 4 is a control sequence diagram for operation of one

embodiment of the inventive system;

Figure 5 is a flow chart illustrating the operation of one embodiment

of the inventive system;

Figure 6 is a control sequence diagram for operation of one

embodiment of the inventive system;

Figure 7 is a timing diagram for the control sequence illustrated in

Figure 6;

Figure 8 is a control sequence similar to Figure 6 for one embodiment

of the invention.

Detailed Description of the Invention:

Figure 1 is a block diagram of a system for use in a hospital or other

health care facility implementing the universal television control system of the

invention. System 10, illustrated in Figure 1 , provides the necessary

interface between the patient, the bed, the control system, and the TV. System 10 implements a plurality of user inputs 12 which are preferably

provided by the bed rail circuitry of a hospital bed or the circuitry of a pillow

speaker. In currently available hospital beds and pillow speakers with TV

control systems, control buttons are available for operating the bed, operating

the television, calling a nurse or other attendant, and a variety of other

functions associated with hospital beds. While the input devices are

traditionally bed rails and pillow speakers, other input devices might be used.

Transient protection circuitry 14 is utilized for isolating the system

controller 16 from a user input device to prevent electrical shock and other

hazards to a patient or other user, and also to protect the controller circuitry.

The controller 16, discussed in greater detail hereinbelow, includes a

processor 36 which provides the necessary signals, in the form of a coded

data stream on output lines 18 for controlling a bi-directional interface and

ultimately for controlling the hospital TV in accordance with the principles of

the present invention. Controller 16 is preferably coupled to an appropriate

power source and regulator circuitry 20, such as power from a hospital bed.

System 10 also preferably includes an auxiliary power source 22, such as

battery, when a more standard source of power is not available. The coded

data stream signals 18 operate bi-directional interface circuitry 24 which

provides proper operational coupling between the TV and processor 36 of

controller 16. Transient protection circuitry 26 is also preferably positioned

between the bi-directional interface circuits 24 and the TV. In that way, a

series of isolated TV control output signals 28 are provided to the TV. Controller 16 circuitry of system 10 is thus electrically isolated both from the

TV and the user input devices for protecting the controller 16 circuitry.

Figure 2 is a circuit schematic diagram for the controller 16 of system

10 illustrated in Figure 1. In accordance with the principles of the present

invention, a patient or other person is able to control a variety of different TV

models using input buttons, switches, or other devices on a hospital bed rail,

pillow speaker, or similar input device. Throughout this application, the term

"models" used in referring to the different types of hospital TVs which are

available, refers both to different brands of hospital TVs made by different

manufacturers, such as RCA/GE, Zenith, and Magnavox/Philips, and also

refers to the different types of models which may be available from any one

manufacturer but which may require a different control protocol.

To control the hospital TV in accordance with the principles of the

invention, user inputs or input signals 12 are provided to controller 16 from

the existing TV control circuitry of a hospital bed 30, or from another input

device 32, such as a pillow speaker. For example, a user input might be the

operation of a button, switch or other device on the bed or pillow speaker.

The TV control input circuitry of a bed will generally be located at the

available left and right side rails of the bed (not shown) as is conventional.

However, it will be understood that other locations on the bed may also be

suitable for the TV control input circuitry. The input circuitry preferably

includes a number of input buttons/switches 34, as shown on the pillow

speaker 32, which may be pressed or activated by a patient. It is also conventional to locate TV control buttons on the pillow speaker. While the

pillow speaker 32 and bed 30 may be used exclusive of each other for TV

control, a pillow speaker will generally be provided with the bed, and in such

a case, the inputs from the various devices may be operably tied together as

illustrated in Figure 2. The various available user inputs will preferably

generate input signals. Figure 2 shows four input lines which make up the

user input signals 12. However, a lesser or greater number of inputs, input

signals and appropriate lines may be provided depending upon the number

of input buttons/switches 34 utilized with the bed or pillow speaker and the

desired control of the TV.

Controller 16 further comprises a processor 36 which is preferably an

integrated circuit micro-processor, such as Model No. PIC 16C84 available

from Microchip, Chandler, AZ. Alternatively, the processor 36 might include

a programmable logic array (PLA) which is specifically configured for use

within the controller 16 in accordance with the principles of the present

invention. The processor 36 is operably coupled to the input devices 30, 32

for receiving input signals 12 therefrom which correspond to the input

buttons/switches 34 accessed by the patient. The processor reads the user

input signals 12, and depending upon the processor's operational mode, as

discussed further hereinbelow, processor 36 will generate output signals 38

(coded data stream 18 from Fig. 1) which are used for ultimately producing

the output signals or control signals 28 necessary for controlling a hospital

TV 40 coupled to system 10 of the invention. In the preferred embodiment of the invention, the processor 36 is

coupled to bi-directional interface circuitry 24 comprising a plurality of relays

42a, 42b, and 42c. The relays are utilized for producing the TV control

signals 28. Three relays are illustrated and discussed herein; however, it will

be understood by a person of ordinary skill in the art that a different number

of relays might also be utilized depending upon the number of control signals

28 which are desired for controlling the hospital TV 40. Therefore, the

system is expandable both with respect to user inputs and output control

signals. Suitable relays are solid state relays HP HSSR 8400 available from

Hewlett-Packard.

In one embodiment, processor 36 is also coupled to a mode switch 44

for controlling the operating mode of the processor. Mode switch 44 may be

a dip switch with a plurality of individual switches to provide a plurality of

different switch states or signals. For example, mode switch 44 illustrated in

Figure 2 has four individual switches 44a, 44b, 44c, and 44d and thus is

capable of providing a number of binary states or mode signals 46 to

processor 36. As illustrated in Figure 2, three of the mode signals 46 (from

switches 44b, 44c, and 44d) are coupled directly to processor 36 while the

other mode signal or output from mode switch 44a is used to couple two

control signal lines together. Again, it will be understood that mode switch

44 may be capable of initiating greater than 16 modes in controller 16 in

accordance with the principles of the present invention. Also, in another embodiment of the invention, a mode switch may not be necessary, as discussed below.

Relay support circuitry 48a, 48b, and 48c is coupled between the

processor 36 and output signals 38 and the respective relays 42a, 42b, and

42c. The support circuitry provides a high drive current to each of the relays

for creating the TV control signals 28. That is, the relays create the actual

control signals 28 for the TV under the command and operation of processor

36 and output signals 38. Preferably the relays 42a, 42b, and 42c are optical

relays which provide an optical isolation between output control signals 28

and the processor 36 and input circuitry 30, 32. In the embodiment disclosed

herein, relay 42a is primarily utilized for the traditional TV functions of TV 40.

Relays 42b and 42c are utilized for radio functions associated with TV 40.

More specifically, the output lines of 42a designated TV+ and TV- are

used to send the appropriate control signals to TV 40, and thus are

appropriately coupled to the TV. The relays 42a, 42b, and 42c are polarity

independent and thus provide the bi-directional interface 24 of controller 16.

TV 40 would generally be coupled to the controller 16 through an appropriate

wall interface 50 (see Figure 1). In conventional systems, it is necessary to

ensure that the polarity of TV lines 52 coupled between TV 40 and the wall

interface 50 was proper because the control lines TV+ and TV- on the other

side of the interface 50 are polarity dependent. However, since the relay

42a will simply connect or disconnect the lines TV+ and TV- in a controlled

fashion to send the appropriate control signals 28, the lines are bi- directionally coupled and the polarity of lines 52 may be switched and the

system 10 of the invention will still operate properly. This provides a

significant advantage over prior systems, which were susceptible to being

improperly wired, thus preventing proper operation of the TV.

Depending upon the mode of operation, relays 42b and 42c are

utilized to provide radio control signals for a wired radio, or alternatively,

channel UP and DOWN signals for some hard-wired TV models such as that

provided by Zenith. Again, mode switch 44 provides a selection of different

modes of operation for processor 36, and additional relays may be added to

the inventive system to address the need for additional TV control signals.

The present system would be operational for a variety of different

hospital TV models including, but not limited to, the following:

RCA and GE televisions currently manufactured by Thomson Consumer Electronics, including RCAJ250520 20 inch TVs and GE20GH550 20 inch TVs and later hospital grade models;

Magnavox and Philips TVs currently manufactured by North American Philips, including Magnavox KJ92-20P 20 inch TVs and

Philips HC9520C 20 inch TVs and later hospital grade models;

Zenith TVs manufactured by Zenith Sales Inc. including Zenith H2057DT 20 inch and later hospital grade models.

The system is also suitable for adaptation to future code-driven hospital-

grade TVs and also operates older TVs currently used with the conventional

TV control protocol. The newer hospital grade TVs are code-driven and thus operate

according to a plurality of different control codes which are sent to the TV.

Old TVs are generally not code-driven. For operating one of a number of

code-driven TVs, controller 16 produces a control signal cluster comprising

a plurality of control signals in accordance with the principles of the present

invention. More specifically, the control signal cluster includes a plurality of

sequentially generated, individual control signals which correspond to the

specific operational functions of a plurality of different models of hospital TVs.

The control signals are sent to the TV one after the other. The inventive

system thus will automatically operate any one of a variety of different models

of hospital TVs in response to a patient input. Furthermore, in an alternative

embodiment, both newer and older TVs may be operated with a single

control signal cluster.

The cluster preferably includes a particular control signal for each of

the TV models that may be used with the invention and alternatively, may

include control signals for older TVs.. The particular TV model interfaced

with a hospital bed or pillow speaker receives the control signal cluster and

will recognize and utilize the particular control signal of that cluster which

operates that specific TV model or the specific older or newer TV. The other

control signals of the cluster which are not meant for the particular model of

older/newer TV in the hospital room are essentially ignored. The control

signal cluster is generated by controller 16 very rapidly and thus presents

little delay in operating a particular TV. That is, there is preferably very little delay between each of the individual control signals of the cluster. The

inventive system can be moved very easily between the various models of

hospital TVs and does not require any reconfiguration or retrofit to operate

the different TV models. In that way, should there be a malfunction in the

bed of the TV, another bed utilizing the inventive system can replace the

malfunctioning bed, or alternatively, another TV may be installed without

concern for the particular TV model and its compatibility with the bed. This

provides a substantial savings in the time required to plan and maintain a

hospital room, and further reduces the logistical problems that have existed

in the past with respect to arranging beds and TVs in hospital rooms so that

compatibility is maintained. Furthermore, the hospital does not have to use

just one particular TV model or one particular bed, as long as all the beds

utilized incorporate the inventive system.

Examples of the operation of the system, and the various selectable

modes of one embodiment of the invention, will be helpful in understanding

the invention. The operational modes of controller 16 are determined by

processor 36 and in one embodiment by mode switch 44 coupled to the

processor. Mode switch 44 is preferably a dip switch which allows for rapid

configuration of controller 16 to tailor the operational mode of the system to

a particular hospital environment. For example, if a hospital contains both

old TVs and newer code-driven TVs, one mode might be selected, whereas

if a hospital only has the older TVs, or only has newer, code-driven TVs,

another mode might be selected. The selected mode may also depend on the kind of radio capabilities available. Therefore, the mode switch provides

a degree of programmability so that a user may program the selected

operating mode. Of course, other programming devices might also be used to select the operating mode.

Figure 3 illustrates a flow chart for the operation of the processor 36

of controller 16 in one embodiment of the invention. Upon powering the bed

30, the pillow speaker 32, or any other available power sources 20, 22, the

processor is powered up and controller 16 is appropriately set to a reset

mode (Step 60). The processor then reads the dip switch 44 (lines 46) to

determine the operating mode selected (Step 61). Then the operating mode

is set for the processor (Step 61A). The processor then returns to, or is

restored to the last operating submode (Step 62) of the selected mode which

will usually correspond to the particular hospital scenario, including the model

of TV which is being controlled. Some of the operating modes of the

invention, like Operating Mode 1 discussed below, have several submodes

that may be used. Accordingly, if one of these modes is chosen, the

processor will want to return to the proper submode in that mode. Processor

36 is therefore preferably configured to store current operating submodes

and to remember the submodes for future operation even if power is

removed.

Next, processor 36 defines the input switches (Step 64), depending

upon the selected operating mode. That is, each of the input

switches/buttons 34 from the bed 30 or pillow speaker 32 or other input device may initiate different operational functions of the TV 40 depending

upon the operating mode of the controller 16. Next, the mode switch is again

read (Step 65) to determine if the switch has been changed after start-up of

the system. If the switch has been changed, a new mode is being requested,

and new input switches must be defined (67). The processor 36 then polls

the input devices (Step 66) and reads the respective input signals 12 to

determine if a patient is trying to control the TV 40. If the user input is active

(Step 68), such as if a button is pushed and/or a switch closed from the

various input devices, then processor 36 will respond accordingly. If no user

input is active, then the processor will simply re-poll or re-read the user inputs

until one of the inputs becomes active as indicated in the flow chart loop in

Figure 3. The processor will also poll the mode switch to detect a mode

change. If a user input is active, processor 36 will determine whether the

user wants to change to a different submode within the current operating

mode (Step 70). In at least one operating mode of the invention, a plurality

of submodes are available for controlling TV 40. For example, an operating

mode may provide control of both old TVs and newer, code-driven TVs,

wherein one submode in that mode is dedicated to the old TVs and another

submode is dedicated to the newer, code-driven TVs. Accordingly, in

response to the user inputs 12, the processor may automatically change from

one submode to another submode (Steps 74, 76) depending upon the model

of TV which is to be controlled. If a user input is active, but no operating mode or submode change is

requested, the processor generates the proper relay control signals 38 for

creating an appropriate control signal cluster 28 to control the TV (Step 72).

As discussed further hereinbelow, the individual and sequentially generated

control signals of each control signal cluster correspond to specific

operational functions for a plurality of different hospital TV models. In the

preferred embodiment of the invention, some of the particular input signals

will generate a control signal cluster which has individual TV control signals

which all relate to essentially the same or very similar operational functions

for different TV models. For example, a TV ON input signal from the patient

will generate a control signal cluster with a plurality of different ON control

signals to turn on different TV models to be interfaced with the system. The

actual TV 40 coupled to the inventive system will see a plurality of ON signals

and will respond only to the ON signal that it recognizes.

If the processor 36 determines that the user is changing the operating

mode to a different submode, the processor will determine that different

operating mode or submode (step 74) and will store that operating mode or

submode (Step 76). As a result, and as illustrated in Figure 3, new switch

inputs for the input devices will be defined (step 64). In one embodiment of

the invention, the mode change or submode change provided by the

controller 16 will be transparent to the user. For example, if the processor is

currently in an operating mode which will allow it to operate both new and old

televisions, but is in a submode which is directed to newer televisions, processor 36 will have to switch submodes in order to control an old TV.

Therefore, in response to a TV ON input from the patient, for example,

controller 16 will generate a control signal cluster for turning new TVs on. An

old TV will not turn on and therefore the patient will generally provide a

prolonged ON signal, such as by keeping the TV ON button depressed. The

processor 36 will read the prolonged ON signal and will switch submodes to

the old TV submode at which time the old TV will turn on.

Operating Mode 1 :

Turning now to the various operating modes of one embodiment of the

invention, Figure 4 shows a simulated timing sequence with associated

simulated control signal clusters for Operating Mode 1 , illustrated with

Submode A and Submode B. The actual control signals of the cluster may

vary from the simulated signals shown by pulse width, number of pulses, and

spacing between pulses. Figure 4 illustrates four input buttons from an input

device, although additional input buttons or switches may be added as

appropriate for expanding the inventive system, as previously discussed.

Furthermore, Figure 4 discloses control signal clusters which have control

signals for TV models designated Magnavox/Philips, RCA/GE and Zenith,

although other manufacturers' codes might also be utilized in the control

signal cluster, as appropriate. Magnavox is listed with Philips, and RCA is

listed with GE, for example, because the hospital TV models having those

brand names share similar control signals. For example, RCA brand TVs

and GE brand TVs will share a similar control signal protocol. On the left side of Figure 4, the input buttons are designated as

ON/OFF, CH UP, CH DOWN, and SELECT/MUSIC for turning the TV on and

off, moving the channel up, moving the channel down, and accessing a radio

feature or selecting some other operational function of the TV, respectively.

When the ON/OFF switch or button 34 on the bed 30, pillow speaker 32, or

other input device is pressed and the processor 36 is in Operating Mode 1

and Submode A, controller 16 sends a control signal cluster 80 to TV 40.

Control signal cluster 80 includes a TV ON/OFF signal for each of

Magnavox/Philips, RCA/GE, and Zenith. The TV model coupled to controller

16 sees the TV ON/OFF control signals of the cluster and will respond

accordingly when it receives the appropriate control signal for that TV model.

The remaining control signals for the cluster are ignored.

As illustrated in Figure 4, the control signals are a series or string of

spaced pulses. To that end, controller 16 provides the relay control signals

38 for opening and closing relay 42a to create the selected pulse strings and

build the control signal cluster. Preferably, there is very little delay between

the individual control signals of each cluster as shown in Figure 4 by the

simulated control pulses. Each time the ON/OFF button is pressed, the

cluster 80 is sent. If the CH UP button is pressed, the controller will create

cluster 82 which includes sequentially generated CHANNEL UP signals for

moving the channel up for the different TV models. Similarly, if the CH

DOWN button is depressed the control signal cluster 84 will include

appropriate CHANNEL DOWN signals for moving the channel down for the available TV models. Both control signal clusters 82 and 84 will also be

generated using relay 42a. Each time the CH UP and CH DOWN buttons are

pressed, a channel change is made. Furthermore, if either button is held

down the appropriate clusters 82, 84 are repeated to change the channel.

If the SELECT/MUSIC button is pushed the control signal cluster 86

created will include control signals for different operational functions

depending upon the TV model. For example, for Magnavox/Philips TVs,

cluster 86 will include the control signal for selecting a particular feature of

the TV, such as a channel guide or other available operational function, while

it will turn on a radio, such as an FM radio, for code-driven RCA/GE TVs and

Zenith TVs. When the radio is on, the CH UP and CH DOWN buttons are

used to change the available channels for the code-driven TVs with radio

features. When the radio has been turned on, a subsequent depression of

the SELECT/MUSIC button will turn the radio off. Cluster 86 will also be

generated through relay 42a.

To turn the television off once it has been turned on, the patient would

touch the ON/OFF button and cluster 80 would again be generated.

Generally, the ON and OFF codes for code-driven hospital TVs are the same.

Therefore, the signal for ON is the same as the signal for OFF. Preferably,

the time between each individual control signal of a cluster is small so that

the patient does not have to wait a significant amount of time to control the

TV each time an input button is pressed. The buttons have been designated

for the most-used particular operational functions of the TV. However, the expandability of the inventive system may require that additional buttons be

added. Furthermore, while buttons such as the CH UP button will provide a

cluster of CHANNEL UP signals, one signal for each TV model, other buttons

may provide mixed control signals for different operational functions, such as

the SELECT/MUSIC button which turns on the radio for some TVs and

selects other options, such as a channel guide, for other TVs. It will be

appreciated that the actual user input buttons may be marked with a

designation other than ON/OFF, CH UP, CH DOWN, etc., depending upon

the available options for the TV and to prevent patient confusion. For

example, if the TV is only capable of radio functions with the SELECT/MUSIC

button, the button might simply be designated MUSIC.

The control signal clusters 80, 82,84, and 86 are generated within

Submode A of Operating Mode 1 , which is directed to newer, code-driven

TVs. However, Operating Mode 1 will also allow the inventive system to

operate old TVs. Old TVs essentially may be controlled with a single button,

which is depressed to turn the TV on, to move up through the channels, and

to turn the TV off when the last viewing channel has been passed. Referring

to Submode B in Figure 4, the input buttons are configured for old TV

operation. However, for operating old TVs, controller 16 must be in

Submode B. In one embodiment of the invention, the controller may be

switched to Submode B according to step 70 of Figure 3 by holding the

ON/OFF button down continuously for approximately 7-8 seconds. The

length of time in which the ON/OFF button is held down is not particularly critical except that it is desirable to prevent inadvertent entry into Submode

B if the patient holds down the ON/OFF button while trying to operate a code-

driven TV. It has been determined that a delay of 7-8 seconds would be

suitable for preventing inadvertent switching between the submodes. When

the processor senses that the ON/OFF button has been held down for 7-8

seconds, it will switch to Submode B, and the ON/OFF button will generate

a signal through relay 42a for turning the old TV on, as illustrated in Figure

4. Since the signal for turning the television on, moving up through the

channels, and turning the television off is essentially the same signal, the CH

UP button, when depressed, will cause the controller 16 to produce a similar

signal through relay 42a. While the signals for turning an old TV on and off

and moving the channel up is essentially created by the opening or closing

of a relay to create a continuous signal rather than a pulsed code, the signal

will still be designated as a "control signal" in the nomenclature of this

invention similar to the pulse codes for the newer code-driven TVs. Once the

processor 36 has been placed in Submode B, it will remain in that submode.

In that way, each subsequent depression of the ON/OFF button does not

have to be continuous for 7-8 seconds to turn the television on. The

submode will preferably be remembered by the processor (Step 76, Figure

3).

In Submode B, the CH UP button produces the same effect as the

ON/OFF button in the sense that once the television is on, depressing the CH

UP button moves the channel up, and will turn the TV off after the last channel has been passed. Once the TV is on, depressing the ON/OFF

button will also change the channels until the TV turns off. When using the

ON/OFF button and the CH UP button, relay 42a will be closed as long as

the button is pressed for controlling the TV.

The SELECT/MUSIC button in Submode B of Operating Mode 1

causes the processor 36 to drive relays 42b and 42c. The relays are held

closed as long as the SELECT/MUSIC button is pressed (see Figure 4.). For

hospital TVs having a separate radio system, the radio will be controlled

through the output of relay 42b, designated as RL and the output of relay

42c, designated as RR. The common line R- for the two relays 42b and 42c

are tied together. When the SELECT/MUSIC button is pressed, the radio is

turned on, and if the button is held, the radio steps through the available

listening channels. When it passes the last listening channel it will turn off,

and will turn on again with a subsequent depression of the SELECT/MUSIC

button. Alternatively, the TV may switch to TV audio after the last radio

channel is passed, depending on the TV being controlled. With the old TVs

the radio system is generally independent of the TV and thus relays 42b and

42c are used instead of the television control relay 42a.

In Operating Mode 1 , the individual switch 44a of mode switch 44 is

open, and the common lines for the TV (TV-) and the radio (R-) are not tied

together as they are for other operating modes. Therefore, in Operating

Mode 1 , old TVs and associated radios and newer, code-driven TVs and

radio systems may be operated without requiring special programming or configuring of a bed or pillow speaker, regardless of the TV model available.

The three switches 44b, 44c, 44d of the mode switch 44 are coupled to

processor 36 to vary the operating mode of the processor. Therefore, the

three switches provide the binary possibility of eight operating modes. Of

course, additional switches may be added to mode switch 44 as appropriate

for expanding the available operating modes of processor 36.

In one possible embodiment, to move back to Submode A from

Submode B, the CH DOWN button is pressed or held for 7-8 seconds to

prevent inadvertent switching back to Submode A. Alternatively, a

SELECT/MUSIC button may be used to switch submodes. The processor

36, then switches back to Submode A for operating code-driven TVs.

Operating Mode II:

In a second Operating Mode, the system 10 is operable for controlling

a Zenith three-wire system TV. In such a system, three dedicated wires are

used. One wire is used for turning the TV on and off, one wire is used for

changing the channel up, and the other wire is used for changing the channel

down. When Operating Mode II is chosen by using switches 44b, 44c, and

44d, the ON/OFF button will drive relay 1 (closed as long as button is

pressed), and will turn the TV on and off. Use of the CH UP button will cause

the processor 36 to drive relay 42b (closed as long as button is pressed) to

change the channel up, and the CH DOWN button causes processor 36 to

drive relay 42c (closed as long as button is pressed) to change the channel

down. In Operating Mode II the SELECT/MUSIC button does not control the TV. Referring to Figure 2, switch 44a of the mode switch 44 must be closed

to couple the TV common line (TV-) and the radio common line (R-) together for proper operation.

Operating Mode III:

Certain hospitals may have only old TVs and a separate radio system.

Therefore, it may be desirable to have the controller operate only for old TVs

and the radio system. To that end, Mode III may be chosen with mode

switch 44. In Mode III, the ON/OFF button drives relay 1 and turns the

television on, moves the channel up, and turns the television off, as

illustrated in Figure 4 for Submode B of Operating Mode I. Similarly, the CH

UP button drives relay 1 for operating the TV like the ON/OFF button. The

CH DOWN button and the SELECT/MUSIC button both drive relays 2 and 3

to toggle the radio on and off and change the channel as described above for

Submode B in Operating Mode I. For a system which will only operate in

mode 3, the labeling of the input CH DOWN might be changed so as not to

confuse the patient. Switch 44a is open in Operating Mode III.

Operating Mode IV:

For those facilities which only utilize newer, code-driven TVs but with

separate radio systems, Mode IV may be chosen with mode switch 44. In

Mode IV, the ON/OFF button turns the television on and off through control

signal clusters, like cluster 80 shown in Figure 4. The CH UP and CH DOWN

buttons also generate control signal clusters like clusters 82 and 84,

respectively. The SELECT/MUSIC button drives relays 42b and 42c (closed as long as button is pressed). In that way, the separate radio may be toggled

on and off and the channel may be changed as discussed with Operating

Mode III. In Operating Mode IV, switch 44a is open. Should it be desirable

for also providing flexibility to operate a code-driven TV with radio features,

the SELECT/MUSIC button might also provide a Radio ON/OFF code, as

shown in cluster 86, for certain TV models.

Operating Mode V:

In Operating Mode V, controller 16 is selected for use with hospitals

having only newer, code-driven TVs with or without radio features. Therefore

the ON/OFF, CH UP and CH DOWN buttons operate as discussed in Mode

1/Submode A. When the SELECT/MUSIC button is depressed, the controller

sends a RADIO ON/OFF code for RCA/GE and Zenith TVs, and the SELECT

signal for Magnavox/Philips (cluster 86). However, the relays 42b and 42c

are not operated because they are not needed due to the lack of any

separate radio system.

Operating Mode VI:

In accordance with the principles of the present invention, a hospital

facility may have only one TV model from a single manufacturer. In such a

case, it may be desirable to provide a controller in which the operating mode

is specifically directed to that TV model, but which includes the other

universal TV control capabilities of the invention should the hospital acquire

other TV models in the future. Accordingly, Mode VI of the processor may generate control signal

clusters which have individual control signals and pulse strings for only one

particular model of TV. For example, a hospital might have only RCA/GE

TVs. Accordingly, when the processor 36 and controller 16 of the invention

are in Mode VI, the controller would generate codes directed only to RCA/GE

for turning a TV on and off, changing channels, and operating the radio

functions of the code-driven TV. For example, an ON/OFF button might

generate a cluster having only TV ON/OFF codes for RCA/GE code-driven

TVs. In that way, the control provided by the inventive system may be more

specifically tailored, thus eliminating extraneous control signals and/or control

functions. Of course, the mode switch could very easily be changed, such

as throwing a different combination on dip switch 44 to provide an expanded

control capability of the system in accordance with the principles of the

present invention, should it be necessary to control additional TV models

beyond the original single TV model. The operation of the controller 16

would be similar to that described above, except that the control signal

clusters would only have control signals for one particular manufacturer, such

as RCA and GE.

Additional Modes: Similar to Operating Mode VI, additional operating modes are utilized

with the inventive system, wherein each operating mode is tailored to a

specific TV model, such as a Zenith model, RCA/GE models, and/or

Magnavox/Philips models, or an even more specific model, such as a particular model of Magnavox or RCA. For example, a hospital may have

only one particular Magnavox model to control, and thus may desire a system

directed to that Magnavox model. In such an operating mode, the control

signal clusters contain only control signals for the selected model of TV. That

is, the control signal clusters will only have the Magnavox control signals

therein. Accordingly, the invention provides adaptability to a very wide

variety of different hospital TV control scenarios and necessary control

protocols. With a quick changing of the mode switch 44, any one of a

number of different operating modes may be selected, depending upon the

hospital scenario and the particular model of TV to be controlled. No

additional programming or hardwiring will be necessary.

In an alternative embodiment of the invention, the mode switch 44

might be eliminated while a generally a similar hardware configuration as

shown in Figure 2 would still be utilized. In the alternative embodiment, the

control signal cluster takes into account individual control signals for both

newer and older TVs, as well as TVs from different manufacturers.

Therefore, different modes will not be necessary for operating older and

newer TVs. Of course, the mode switch 44 may still have use in a number

of installations, particularly those requiring wired radio, or alternatively for

CHANNEL UP and CHANNEL DOWN signals for some hard-wired TV

models, as described above. The alternative embodiment will further

eliminate the need for the controller to remember its last sub-mode state, such as upon power loss, thus reducing the control complexity and overall cost of the system.

The alternative embodiment takes into account that newer, code-

driven hospital TVs are manufactured for backward compatibility with control

systems for older TVs due to the installed single-button controllers currently

predominant in the hospital market. That is, the newer TVs must also

recognize the control signals for older TVs so that they may be used in

existing hospital facilities with only older command hardware. However, older

style hospital TVs do not recognize the new code-driven TV commands. By

incorporating the control signals for newer and older TVs into a single cluster,

the need for mode switch configuration, patient interfacing with the mode

switch, and storing of the sub-mode information is generally eliminated, thus

reducing the complexity of the control system.

Figure 5 is the flow chart depicting the operation of the processor for

the alternative embodiment of the invention. Upon powering the system, the

controller 16 is set to a reset mode (Step 101), similar to the reset mode in

the embodiment discussed above. The processor 16 then may read certain

configuration switches to determine the interface characteristics of the

system. For example, a configuration switch might define special

installations, such as wired radio systems, or those systems that have wired

CHANNEL UP and CHANNEL DOWN signals, as previously disclosed. In

such a scenario, the configuration switches might handle some of the tasks

handled by a mode switch. As noted, the alternative embodiment preferably eliminates mode switches and thus the reading of the configuration switch

(Step 102) would be optional, depending upon the hardware configuration.

Next, the processor 16 defines the various button switch inputs (Step 103).

The definition of the button inputs may also depend upon the setting of any

optional configuration switches, although they may be hardwired. Since

there will preferably be no mode switching within the embodiment disclosed

in Figures 5-8, it is not necessary to continue to read and re-read a mode

switch and to restore the last operating sub-mode of the system.

After power to the system, the processor 16 then polls the various

button inputs (Step 104) to determine if a user input is active and a user is

interfacing with the system, i.e., a user is pressing a control button for a TV.

If no button input is active, the processor 16 returns to read any optional

configuration switches (Step 102) or to define the button inputs (Step 103) as

shown in Figure 5. If one of the user inputs is active, as determined by a

YES answer to Step 104, then the processor checks to see if the active input

is the ON/OFF button input (Step 105). If the ON/OFF button input is active,

the processor 16 then sends the appropriate ON/OFF control signal cluster

for the particular TVs coupled to the system, such as those manufactured by

Magnavox/Philips, RCA/GE, and Zenith. Referring to Figure 6, the ON/OFF

cluster is shown as cluster 201 in Figure 6. The individual control signals of

the cluster are sent consecutively and sequentially with a short delay

between each, as discussed above. Of course, the sequence order of the various different manufacturers may be varied. For example, the Zenith

control signal may be sent as the first signal in the cluster.

In accordance with one aspect of the alternative embodiment of the

invention, the control signal cluster 201 also may include individual control

signals for older TVs, as well as the newer, code-driven TVs of the various

manufacturers. Turning to Figure 5, the processor 16 will send cluster 201

to turn the television on or off (Step 106). Processor 16 will then continue to

monitor the input line to see if the ON/OFF button input is still active (Step

108), ie., the system determines if a user is holding the button down or in an

engaged position. If it is not, processor 16 returns to steps 102 and 103, as

shown in Figure 5. However, if the ON/OFF button input is still active, the

processor 16 sends a pulsed data stream (Step 112) until the ON/OFF button

is released. Referring to Figure 6, the pulsed data stream 201a is shown

which includes a high period 201b that is approximately 600 milliseconds in

duration and a low period 201c that is approximately 20 milliseconds in

duration. The pulsed data stream 201a is operable to turn on an older TV

which does not recognize the other coded control signals of cluster 201.

Upon receiving the pulsed data stream 201a, an older TV will turn on.

Furthermore, the TV will begin to sequence up in channels if the ON/OFF

button input is still engaged and the data stream is continuously repeated.

The upward sequencing through the viewing channels is currently how older

TVs will operate upon receiving the repeated pulsed data stream 201a. The

pulsed data stream 201a is repeated as long as the ON/OFF button input is held (Step 112). In that way, control signal cluster 201 is capable of

operating both newer and older style TVs without the requirement of a mode

selection switch, or mode selection through a user interface. Therefore, the

operation of the ON/OFF control for any kind of TV, older or newer, code- driven, is transparent to a user.

When the ON/OFF button input is active, the processor 16 sends all

of the various coded control signals of the cluster in their entirety for all

applicable TV manufacturers, even if the user releases the ON/OFF button

input before all of the individual control signals are sent. In that way, any

newer code-driven television will be turned on, as long as the specific control

signal for the TV make/model is within the cluster 201. If nothing occurs

upon engaging the ON/OFF button (indicating that an older TV is being

used), the user will usually continue to engage the ON/OFF button input until

something does occur. When the button input is continuously engaged so

that the input signal generated by the button input continues for a

predetermined amount of time after the control signals are sent, the pulsed

data stream 201a will be sent by the controller 16 to turn on or off the older

TV. In that way, the data stream 201a is added to cluster 201 as part of the

cluster. If a newer TV is utilized and turns on through one of the coded

control signals in cluster 201 , and the user still continues to engage the

ON/OFF button input for a predetermined time, the pulsed data stream 201a

will be sent by the controller and a new model TV will also begin to sequence

up through channels. This is because newer, code-driven TVs are backward compatible to the control process of an old TV, as discussed above. That is,

the newer TVs see the pulsed data stream as a user input that is

consecutively pressing a single button input. Therefore, the newer TVs will

ramp up through the channels effectively at a 620 millisecond rate, according

to the length of the pulsed data stream 201a. The older TVs will also ramp

up through channels if the button input remains active after the TV is on. The

pulsed data stream 201a will be immediately terminated as soon as the

ON/OFF button input is inactive or disengaged. Therefore, either a newer,

code-driven TV or an older, single-button interface TV will respond to the

ON/OFF button input of the invention. Consecutive presses and releases of

the ON/OFF button will toggle a newer TV on and off as desired.

Returning to Figure 5, if the ON/OFF button input is not active, the

processor checks to see if the CHANNEL UP button input is active (Step

110). If the CHANNEL UP button input is active, the processor 16 sends a

signal cluster 202 which consists of a plurality of pulsed data streams 202a.

Referring to Figure 6, the pulsed data streams 202a are similar to the pulsed

data stream 201a and include approximately a 600 millisecond high period

and a 20 millisecond low period. As mentioned above, newer TVs are made

to be backward compatible with the older TVs such that the newer TVs will

also recognize the pulsed data stream 202a as a CHANNEL UP control

command, similar to the older TVs. As illustrated in Figure 5, older TVs turn

on and proceed through the channels in response to the same data stream.

Therefore, both newer TVs and older TVs will scroll upwardly through the available channels upon receiving the cluster 202. The pulsed data stream

202a of cluster 202 will essentially be repeated continuously as long as the

CHANNEL UP button input is active (Step 112). The invention will create an

upward scrolling through available channels at about a 600 millisecond interval or rate.

If the CHANNEL UP button input is not active, the processor 16 then

checks to see if the CHANNEL DOWN button input is active (Step 109). If

the CHANNEL DOWN button input is active, the processor 16 sends the

cluster 204 which includes the various coded control signals for the TVs. The

coded control signals of cluster 204 initiate the appropriate command

(CHANNEL DOWN) for the newer style TVs, as indicated by reference

numeral 204a. The processor will send all of the individual command signals

for the various different TV models in their entirety, even if the user releases

the CHANNEL DOWN button before all of the individual signals have been

sent. If the user continues to hold or engage the CHANNEL DOWN button,

the codes will be followed by a delay period 204b that pads the time period

such that the combination of control signals 204a and the delay 204b is

approximately 600 milliseconds long. If the CHANNEL DOWN button input

is held active, the processor continues to send the full set of CHANNEL

DOWN commands 204c repeatedly in the sequence (Step 107). This allows

a user to scroll through the viewing channels by maintaining the CHANNEL

DOWN button input active when the TV that is coupled to the control system

is a newer style, code-driven TV. Older style TVs will not respond to the control signal cluster 204. The 600 millisecond time period created by the

individual control signals 204a and the delay 204b provides the user the

capability of scrolling both CHANNEL UP and CHANNEL DOWN through the

available viewing channels of a newer TV at essentially the same rate (i.e.,

around 600 milliseconds), if either button input is held active. Therefore, the

user may actively move through the channels, up or down, at the same

speed.

If the CHANNEL DOWN button input is not active, the system may

send a code defined for a particular switch which is active (Step 111). As

mentioned above, other options may be available for controlling a TV. For

example, the system might incorporate a SELECT/MUSIC button input.

Referring to Figure 6, if the SELECT/MUSIC button input is active, a control

signal cluster 203 is generated, which consists of the appropriate command

SELECT or RADIO ON/OFF for newer TVs. If an older TV is coupled to the

control system, and the SELECT/MUSIC button input is active, the TV will not

respond to the cluster 203. Again, for the SELECT/MUSIC button input, all

of the commands for the various manufacturers will be sent, even if the user

releases the button before all of the individual code signals of the cluster 203

have been sent. Figure 7 is a timing diagram of one embodiment of the control signal

cluster, and the spacing delays associated with each command. Reference

numeral 301 represents a particular cluster wherein each of the

manufacturer's control signals and their durations for the newer code-driven TVs are shown. Essentially, a full control signal cluster including the three

different control signals described herein will have a length of approximately

230 milliseconds, including 40 millisecond delay periods between the

individual coded control signals. Of course, other clusters may have different

lengths in accordance with the principles of the invention.

Referring to Figure 8, another timing diagram for operation of one

embodiment of the invention is illustrated. The various control signal clusters

are shown for selectable button inputs. As may be seen, the clusters for the

ON/OFF, CHANNEL UP and CHANNEL DOWN, as indicated by reference

numerals 401 , 402, and 404, respectively, are all appropriately padded with

a time delay of approximately 370 milliseconds such that the overall length

of each cluster, in addition to the 230 milliseconds required for the control

signals, indicated respectively as 401a, 403a, and 404a, will essentially have

a length which matches the 600 millisecond length of the pulsed data stream

utilized with the ON/OFF and CHANNEL UP inputs. The control signal

cluster 403 for the SELECT/MUSIC input, will only include a single 230

millisecond control signals 403a. Of course, various different signal cluster

durations and delays may be utilized in accordance with the principles of the

invention. While the present invention has been illustrated by the

description of the embodiments thereof, and while the embodiments have

been described in considerable detail, it is not the intention of the applicant

to restrict or in any way limit the scope of the appended claims to such detail. Additional advantages and modifications will readily appear to those skilled

in the art. Therefore, the invention in its broader aspects is not limited to the

specific details representative apparatus and method, and illustrative

examples shown and described. Accordingly, departures may be made from

such details without departure from the spirit or scope of applicant's general

inventive concept.

What is claimed is:

Claims

Claims:

1. A television control system for control of different models of hospital televisions, the system comprising:

an input device operable for generating at least one input signal

corresponding to an input from a person;

a controller configured for interfacing with a hospital television, the

controller operable for generating a cluster of control signals, in response to

said input signal, to operate different models of hospital televisions which

may be coupled to said control system;

the control signal cluster including a plurality of sequentially generated,

individual control signals corresponding to specific operational functions of

a plurality of different models of hospital televisions;

the controller further operable for generating a data stream as part of

the control signal cluster when said input signal continues for a

predetermined time after the control signals are generated, the data stream

corresponding to an operational function of a hospital television which is not

responsive to said control signals.

whereby the control system will automatically operate any one of a

variety of different models of hospital televisions in response to a patient

input.

2. The television control system of claim 1 wherein said controller is

operable for generating control signals for turning on a hospital television,

said control signal cluster including sequentially generated ON signals for a

plurality of different models of hospital televisions.

3. The television control system of claim 1 wherein said controller is

operable for generating control signals for turning off a hospital television,

said control signal cluster including sequentially generated OFF signals for

a plurality of different models of hospital televisions.

4. The television control system of claim 1 wherein said controller is

operable for generating control signals for varying viewing channels of a

hospital television, said control signal cluster including sequentially generated

CHANNEL signals for a plurality of different models of hospital televisions.

5. The television control system of claim 4 wherein said CHANNEL

signals include CHANNEL UP signals to operate a television to move up

through available viewing channels of a hospital television.

6. The television control system of claim 4 wherein said CHANNEL

signals include CHANNEL DOWN signals to operate a television to move

down through available viewing channels of a hospital television.

7. The television control system of claim 1 wherein said controller is

operable for generating control signals for operating a radio device

associated with a hospital television, said control signal cluster including at

least one RADIO signal corresponding to a particular model of hospital television.

8. The television control system of claim 1 wherein said controller is

operable for generating control signals for selecting an operational function

from available television operational functions, said control signal cluster

including at least one SELECT signal corresponding to a particular model of

hospital television.

9. The television control system of claim 1 wherein said controller

comprises a processor for processing said input signal to generate said

control signals.

10. The television control system of claim 1 wherein said controller

comprises a relay, the relay being opened and closed to generate said

control signals.

11. The television control system of claim 1 wherein said control signal

cluster includes delay periods therein between the control signals.

12. The television control system of claim 1 wherein said input device is

operable for generating a plurality of different input signals and said controller

is operable for generating different control signals for a plurality of different

operational functions of hospital televisions in response to the different

control signals, the different control signals being configured to have

generally the same effective duration so that the different operational

functions of the televisions may be operated at effectively the same rate.

13. A hospital bed having capabilities for controlling different models of

hospital televisions located proximate the bed comprising:

a frame and a support surface coupled to the frame to receive a person;

an input device operable for generating at least one input signal

corresponding to an input from a person;

a controller configured for interfacing with a hospital television, the

controller operable for generating a cluster of control signals, in response to

said input signal, to operate different models of hospital televisions which

may be coupled to said control system;

the control signal cluster including a plurality of sequentially generated,

individual control signals corresponding to specific operational functions of

a plurality of different models of hospital televisions;

the controller further operable for generating a data stream as part of

the control signal cluster when said input signal continues for a

predetermined time after the control signals are generated, the data stream

corresponding to an operational function of a hospital television which is not

responsive to said control signals.

whereby the control system will automatically operate any one of a

variety of different models of hospital televisions in response to a patient

input.

14. The hospital bed of claim 13 wherein said controller comprises a

processor for processing said input signal to generate said control signals.

15. The hospital bed of claim 13 wherein said controller comprises a

relay, the relay being opened and closed to generate said control signals.

16. A hospital pillow speaker to be used with a hospital bed and having

capabilities for controlling different models of hospital televisions located

proximate the bed, the pillow speaker comprising:

a body including an interface surface for interfacing with a person;

a plurality of input devices available at the interface surface and

operable for generating at least one input signal corresponding to an input

from a person;

a controller configured for interfacing with a hospital television, the

controller operable for generating a cluster of control signals, in response to

said input signal, to operate different models of hospital televisions which

may be coupled to said control system;

the control signal cluster including a plurality of sequentially generated,

individual control signals corresponding to specific operational functions of

a plurality of different models of hospital televisions;

the controller further operable for generating a data stream as part of

the control signal cluster when said input signal continues for a

predetermined time after the control signals are generated, the data stream

corresponding to an operational function of a hospital television which is not

responsive to said control signals; whereby the control system will automatically operate any one of a

variety of different models of hospital televisions in response to a patient

input.

17. The pillow speaker of claim 16 wherein said controller comprises a

processor for processing said input signal to generate said control signals.

18. The pillow speaker of claim 16 wherein said controller further

comprises a relay operably coupled to said processor, the processor

operable, in response to said input signal, to open and close the relay to

generate said control signals.

19. The pillow speaker of claim 16 wherein said controller comprises a

relay, the relay being opened and closed to generate said control signals.

20. A television control system for control of different models of hospital televisions, the system comprising:

an input device operable for generating at least one input signal

corresponding to an input from a person;

a controller configured for interfacing with a hospital television, the

controller operable for generating control signals to operate different models

of hospital televisions which may be coupled to said control system;

the controller coupled to said input device to receive said input signal

and further operable for generating a control signal cluster reflective of said

input signal;

the control signal cluster including a plurality of sequentially generated,

individual control signals corresponding to specific operational functions of

a plurality of different models of hospital televisions;

whereby the control system will automatically operate any one of a

variety of different models of hospital televisions in response to a patient

input.

21. The television control system of claim 20 wherein said controller

generates control signals for turning on a hospital television, said control

signal cluster including sequentially generated ON signals for a plurality of different models of hospital televisions.

22. The television control system of claim 20 wherein said controller

generates control signals for turning off a hospital television, said control

signal cluster including sequentially generated OFF signals for a plurality of

different models of hospital televisions.

23. The television control system of claim 20 wherein said controller

generates control signals for varying viewing channels of a hospital

television, said control signal cluster including sequentially generated

CHANNEL signals for a plurality of different models of hospital televisions.

24. The television control system of claim 23 wherein said CHANNEL

signals include CHANNEL UP signals to operate a television to move up

through available viewing channels of a hospital television.

25. The television control system of claim 23 wherein said CHANNEL

signals include CHANNEL DOWN signals to operate a television to move

down through available viewing channels of a hospital television.

26. The television control system of claim 20 wherein said controller

generates control signals for operating a radio device associated with a

hospital television, said control signal cluster including at least one RADIO

signal corresponding to a particular model of hospital television.

27. The television control system of claim 20 wherein said controller

generates control signals for selecting an operational function from available

television operational functions, said control signal cluster including at least

one SELECT signal corresponding to a particular model of hospital television.

28. The television control system of claim 20 wherein said controller

comprises a processor for processing said input signal to generate said

control signals.

29. The television control system of claim 28 wherein said controller

further comprises a relay operably coupled to said processor, the processor

operable, in response to said input signal, to open and close the relay to

generate said control signals.

30. The television control system of claim 20 wherein said controller

comprises a relay, the relay being opened and closed to generate said

control signals.

31. The television control system of claim 20 wherein said controller is

capable of operating in one of a plurality of selectable operating modes.

32. The television control system of claim 31 wherein the controller further

comprises a mode switch, the mode switch operable for setting said

operating mode of the controller.

33. The television control system of claim 32 wherein said mode switch is

programmable to be operable for a person to select the operating mode of

the controller.

34. The television control system of claim 31 wherein at least one of said

operating modes includes a selectable submode to be selected by a person

when in that operating mode.

35. T he television control system of claim 31 wherein at least one of said

operating modes includes a selectable submode, the controller operable for

automatically selecting said submode in response to a user input.

36. The television control system of claim 31 wherein at least one of said

operating modes includes a plurality of selectable submodes, the controller

being operable, in one of said submodes, for generating said control signal

cluster and being operable, in another of said submodes, for generating a non-cluster control signal for operating televisions which do not respond to

the cluster of control signals, whereby older televisions may be operated.

37. The television control system of claim 20 wherein the controller is

further operable for generating a non-cluster control signal for operating

televisions which do not respond to the cluster of control signals.

38. The television control system of claim 31 wherein, in one of said

operating modes, the controller is operable for generating control signal

clusters which have control signal generally directed to a single model of

television.