WO1993020472A1 - Visual display apparatus - Google Patents
Visual display apparatus Download PDFInfo
- Publication number
- WO1993020472A1 WO1993020472A1 PCT/US1992/002708 US9202708W WO9320472A1 WO 1993020472 A1 WO1993020472 A1 WO 1993020472A1 US 9202708 W US9202708 W US 9202708W WO 9320472 A1 WO9320472 A1 WO 9320472A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- substrate
- coating
- image generator
- observer
- dichroic coating
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0123—Head-up displays characterised by optical features comprising devices increasing the field of view
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0143—Head-up displays characterised by optical features the two eyes not being equipped with identical nor symmetrical optical devices
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/26—Reflecting filters
Definitions
- the present invention relates to visual display apparatus and more particularly to displays which are superimposed on a transparent surface.
- HUDs Head-Up Displays
- Conventional head up displays are relatively complex and expensive. These typically include high brightness CRTs and may employ a holographic combiner for providing relatively high optical quality and contrast with respect to background. The cost and complexity of conventional head up displays renders them unsuitable for most civilian applications and impracticable for mass market consumer applications.
- the present invention seeks to provide a relatively inexpensive and simple superimposed display which, due to its simplicity and cost effectiveness is suitable for a wide range of applications .
- display apparatus comprising a generally transparent injection moldable plastic substrate, a dichroic coating associated with the substrate, a solid state image generator operatively associated with the substrate and the dichroic coating, such that the image generated by the solid state image generator in a given wavelength range is reflected from the substrate to an observer while light of wavelengths outside of the given wavelength range passes through the substrate to the observer.
- the substrate has optical power for reflection and the image generator is disposed in the focal plane of the substrate.
- the dichroic coating is formed directly on the substrate.
- the dichroic coating is formed on a coating substrate which is in turn associated with the substrate.
- Fig. 1 is a schematic illustration of display apparatus constructed and operative in accordance with a preferred embodiment of the present invention
- Fig. 2A is a graph illustrating transparency/reflection of a dichroic coating formed on a polycarbonate visor for red illumination at an angle of incidence of 15 degrees
- Fig. 2B is a graph illustrating transparency/reflection of a dichroic coating formed on a polycarbonate visor for green illumination at an angle of incidence of 15 degrees
- Fig. 3 is a schematic illustration of display apparatus for an automobile windshield constructed and operative in accordance with a preferred embodiment of the invention
- Fig. 4 is a schematic illustration of display apparatus for an automobile windshield constructed and operative in accordance with a preferred embodiment of the invention.
- FIG. 1 illustrates schematically imaging apparatus constructed and operative in accordance with a preferred embodiment.
- a substrate 10 typically formed of a plastic material such as polycarbonate, defines goggles or a visor, which is shown in section in Fig. 1.
- a dichroic coating 12 is formed on the substrate 10, preferably on an inner surface thereof, either by direct vacuum deposition using a technique available from Denton Vacuum of Cherry Hill, New Jersey, U.S.A. or alternatively by means of a dichroic coated substrate, such as a film of polycarbonate which is adhered as by transparent adhesive to substrate 10.
- the substrate 10 is configured to have optical power for reflection but no optical power for transmission and may be formed with spheric or aspheric curvature as appropriate.
- An image generator 14 is arranged out of the line of sight between the user's eye or eyes and the substrate and so as to display an image which is reflected by the dichroic coating 12 back to the user's eye or eyes .
- a preferred image generator 14 may be a solid state high brightness green or red x 7 dot matrix such as model numbers HDSP2002 or HDSP2003 manufactured by Hewlett Packard.
- the image generator preferably provides a peak luminous intensity per LED of approximately 1000 microcandle, with a duty cycle of 20 % for a LED area of 5-8 x 10 " ? square feet, providing an average brightness of lO ⁇ OFt Lm.
- the transmission/reflection curves of two suitable dichroic coatings are set forth in Figs. 2A and 2B.
- This average brightness is low compared with an average brightness of 5 ⁇ 00FtLm which can be realized from a cathode ray tube. It is a particular feature of the present invention that by use of the dichroic coating on the substrate 10 and by avoiding any attenuation through elimination of optics between the coating 12 and the image generator 1 , acceptable contrast is provided even against clear sky.
- the configuration and arrangement of the substrate 10 with respect to the eye or eyes of the user are such that the image reflected from the image generator 14 by the dichroic coating 12 to the eye or eyes of the user arrives at the user's eyes in generally parallel rays, as if coming from infinity and thus does not require constant refocusing of the user's eyes to see the reflected images.
- FIG. 3. illustrates display apparatus for an automobile windshield constructed and operative in accordance with a preferred embodiment of the invention and comprising a windshield 30 typically formed of polycarbonate optical plastic having a spherical or aspheric curvature, such as an off-axis parabolic curvature.
- a dichroic coating 32 is formed on the windshield 30.
- An image generator 34 which may be identical to the image generator 14 described hereinabove, is located preferably in the focal plane of the windshield, such that the images generated thereby are reflected by dichroic coating 3 to the eyes of a driver in parallel rays so as to appear to come from infinity.
- Fig. 4 illustrates an alternative arrangement of display apparatus wherein the dichroic coating is not formed directly on the window or windshield but rather on a second substrate 40 which is adhered by any suitable means onto the windshield.
- Fig. 4 The arrangement of Fig. 4 is particularly useful for retrofit applications and for applications where coating of a large substrate is impractical or unacceptably costly.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US1992/002708 WO1993020472A1 (en) | 1992-04-02 | 1992-04-02 | Visual display apparatus |
EP92915460A EP0694178A1 (en) | 1992-04-02 | 1992-04-02 | Visual display apparatus |
AU23349/92A AU2334992A (en) | 1992-04-02 | 1992-04-02 | Visual display apparatus |
JP51739693A JPH08500909A (en) | 1992-04-02 | 1992-04-02 | Visual display device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US1992/002708 WO1993020472A1 (en) | 1992-04-02 | 1992-04-02 | Visual display apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1993020472A1 true WO1993020472A1 (en) | 1993-10-14 |
Family
ID=22230951
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1992/002708 WO1993020472A1 (en) | 1992-04-02 | 1992-04-02 | Visual display apparatus |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0694178A1 (en) |
JP (1) | JPH08500909A (en) |
AU (1) | AU2334992A (en) |
WO (1) | WO1993020472A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2718855A1 (en) * | 1994-04-18 | 1995-10-20 | Boisse Serge | Optical information device e.g. for virtual reality spectacles, earphones, helmet |
EP0921427A2 (en) * | 1997-12-02 | 1999-06-09 | Canon Kabushiki Kaisha | Optical element |
GB2415266A (en) * | 2004-06-19 | 2005-12-21 | Francis * Snape Richard | Head up display |
US7411734B2 (en) | 2005-11-10 | 2008-08-12 | 3M Innovative Properties Company | Color-splitting optical element and an optical system utilizing the color-splitting optical element |
US7460306B2 (en) | 2004-05-14 | 2008-12-02 | 3M Innovative Properties Company | Multi-directional optical element and an optical system utilizing the multi-directional optical element |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202006018992U1 (en) * | 2006-12-16 | 2007-04-05 | Kennametal Inc. | Cutting insert for processing one-sided cover surface, has chip-shaped units formed at wall sections and arranged at same distance to one another, where chip-shaped units have roof area and flanks that are inclined to chip-shaped base |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3887273A (en) * | 1973-07-27 | 1975-06-03 | Friedemann Conrad J | Speedometer optical projection system |
US3899241A (en) * | 1973-12-11 | 1975-08-12 | Ppg Industries Inc | Visual display windshield |
EP0329110A2 (en) * | 1988-02-16 | 1989-08-23 | K.W. Muth Company, Inc. | Multiple object viewing system |
US4990899A (en) * | 1988-04-07 | 1991-02-05 | Rasaat | Motorcycle data display apparatus |
US5066102A (en) * | 1989-10-09 | 1991-11-19 | Asahi Glass Company, Ltd. | Combiner for head-up display and glass with durable reflective coating |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0393098B1 (en) * | 1987-09-18 | 1996-07-10 | Hughes Flight Dynamics, Inc. | Automobile head-up display system |
-
1992
- 1992-04-02 WO PCT/US1992/002708 patent/WO1993020472A1/en not_active Application Discontinuation
- 1992-04-02 EP EP92915460A patent/EP0694178A1/en not_active Withdrawn
- 1992-04-02 JP JP51739693A patent/JPH08500909A/en active Pending
- 1992-04-02 AU AU23349/92A patent/AU2334992A/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3887273A (en) * | 1973-07-27 | 1975-06-03 | Friedemann Conrad J | Speedometer optical projection system |
US3899241A (en) * | 1973-12-11 | 1975-08-12 | Ppg Industries Inc | Visual display windshield |
EP0329110A2 (en) * | 1988-02-16 | 1989-08-23 | K.W. Muth Company, Inc. | Multiple object viewing system |
US4990899A (en) * | 1988-04-07 | 1991-02-05 | Rasaat | Motorcycle data display apparatus |
US5066102A (en) * | 1989-10-09 | 1991-11-19 | Asahi Glass Company, Ltd. | Combiner for head-up display and glass with durable reflective coating |
Non-Patent Citations (1)
Title |
---|
See also references of EP0694178A4 * |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2718855A1 (en) * | 1994-04-18 | 1995-10-20 | Boisse Serge | Optical information device e.g. for virtual reality spectacles, earphones, helmet |
EP0921427A2 (en) * | 1997-12-02 | 1999-06-09 | Canon Kabushiki Kaisha | Optical element |
EP0921427A3 (en) * | 1997-12-02 | 2004-08-04 | Canon Kabushiki Kaisha | Optical element |
US7460306B2 (en) | 2004-05-14 | 2008-12-02 | 3M Innovative Properties Company | Multi-directional optical element and an optical system utilizing the multi-directional optical element |
GB2415266A (en) * | 2004-06-19 | 2005-12-21 | Francis * Snape Richard | Head up display |
US7411734B2 (en) | 2005-11-10 | 2008-08-12 | 3M Innovative Properties Company | Color-splitting optical element and an optical system utilizing the color-splitting optical element |
Also Published As
Publication number | Publication date |
---|---|
JPH08500909A (en) | 1996-01-30 |
EP0694178A4 (en) | 1994-12-20 |
AU2334992A (en) | 1993-11-08 |
EP0694178A1 (en) | 1996-01-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA1318528C (en) | Compact see-through night vision goggles | |
US10754160B2 (en) | See-through curved eyepiece with patterned optical combiner | |
US7397606B1 (en) | Meniscus head up display combiner | |
US7095562B1 (en) | Advanced compact head up display | |
US7751122B2 (en) | Substrate-guided optical device particularly for vision enhanced optical systems | |
US5856811A (en) | Visual display and helmet assembly | |
US7158095B2 (en) | Visual display system for displaying virtual images onto a field of vision | |
EP1664899B1 (en) | Substrate-guided optical devices | |
US8582209B1 (en) | Curved near-to-eye display | |
US4269476A (en) | Helmet-mounted display system | |
EP0834097B1 (en) | Head gear display system | |
US5355224A (en) | Apparatus including a mangin mirror for superimposing variable graphical and alphanumeric information onto the image plane of an optical viewing device | |
EP0389403A2 (en) | A helmet mounted display having dual interchangeable optical eyepieces | |
JPS63256706A (en) | Helmet mount mold display apparatus | |
JPS63177108A (en) | Helmet mounted type display device, visor mounted thereon and manufacture thereof | |
US5291316A (en) | Information display system having transparent holographic optical element | |
GB2240853A (en) | Head-up display | |
EP0694178A1 (en) | Visual display apparatus | |
CN112255809A (en) | Lens group and near-to-eye display device | |
WO2008156675A1 (en) | Viewing system for augmented reality head mounted display | |
US11175483B2 (en) | Wide field of view head mounted display | |
CN110824694A (en) | Enhancement mode night-vision goggles visual system based on color separation membrane | |
IL173452A (en) | Substrate-guided optical device particularly for vision enhanced optical systems |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AU CA JP |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IT LU MC NL SE |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1992915460 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: CA |
|
WWP | Wipo information: published in national office |
Ref document number: 1992915460 Country of ref document: EP |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1992915460 Country of ref document: EP |