WO2007085286A1 - Flexible display - Google Patents

Flexible display Download PDF

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Publication number
WO2007085286A1
WO2007085286A1 PCT/EP2006/011376 EP2006011376W WO2007085286A1 WO 2007085286 A1 WO2007085286 A1 WO 2007085286A1 EP 2006011376 W EP2006011376 W EP 2006011376W WO 2007085286 A1 WO2007085286 A1 WO 2007085286A1
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WIPO (PCT)
Prior art keywords
light
interface
flexible display
electrical
display according
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Application number
PCT/EP2006/011376
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German (de)
French (fr)
Inventor
Andreas Eckhardt
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Deutsches Zentrum für Luft- und Raumfahrt e.V.
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Publication of WO2007085286A1 publication Critical patent/WO2007085286A1/en

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Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F15/00Boards, hoardings, pillars, or like structures for notices, placards, posters, or the like
    • G09F15/0006Boards, hoardings, pillars, or like structures for notices, placards, posters, or the like planar structures comprising one or more panels
    • G09F15/0025Boards, hoardings, pillars, or like structures for notices, placards, posters, or the like planar structures comprising one or more panels display surface tensioning means

Definitions

  • the invention relates to a flexible display, in particular for use as a cinema screen or theater backdrop.
  • 2D and 3D reconnaissance and projection methods are known, as well as automatic display methods based on conventional projectors, plasma or LCD TV sets. All of these methods require rigid applications.
  • a disadvantage of the known method is that the achievable surfaces are either too small and not modular or require too large an area requirement in front of or behind the screen.
  • a lighting arrangement for an autostereoscopic display which optionally can also have a largely homogeneous illumination effect, consisting of at least one light source, a mask and a plurality of opaque and transparent surface elements and an array of wavelength filters, wherein the mask has a structure corresponding to the structure of the array of wavelength filters, wherein opaque elements of the array of wavelength filters on the mask in the same shape and size as opaque surface elements and non-opaque elements of the array of wavelength filters on the mask in the same shape and size as transparent surface elements be formed, the opaque elements of the array of wavelength filters as the controlling surface elements, between the array of wavelength filters and the mask a controllable optically birefringent-acting material of thickness z, which with a drive is provided is arranged.
  • the mask-facing surface of the material on which the light originating from the light source is incident is oblique to the optical axis of the material, whereby the illumination arrangement in arrangements for autostereoscopic display depending on the set optically birefringent effect of the material advantageously a 2D or 3D Lighting mode allows.
  • the invention is based on the technical problem of providing a flexible display that is modularly adaptable in terms of size to different size ratios and in particular can be used as a cinema screen, panoramic screen or theater scenery.
  • the solution of the technical problem results from the subject matter with the features of claim 1. Further advantageous embodiments of the invention will become apparent from the dependent claims.
  • the flexible display comprises a flexible, transparent carrier film, wherein a plurality of light-emitting elements are arranged on the carrier film.
  • Each light-emitting element can emit at least three colors, preferably red, green and blue, the colors being selectively switchable on or off.
  • Each light-emitting element is associated with a diffuse lenticular element, by means of which the colors are mixed and the radiation is directed, wherein between the light-emitting elements, an opaque separation layer is disposed and below the light-emitting elements at least one thermal interface and an electrical interface are arranged. Due to the flexible carrier foil, the flexible display can be adapted to desired sizes and shapes, whereby even large canvases or scenes can be realized.
  • the resolution of the display depends on the size and density of the light-emitting elements.
  • in large screens can be a distance between the light-emitting elements in the cm range, which ensures a sufficient resolution and is technologically easy to handle.
  • the opaque separating layer By means of the opaque separating layer, an undesired optical crosstalk between two adjacent light-emitting elements is avoided.
  • the electrical loss of heat of the light-emitting elements can then be dissipated via the thermal interface and the drive signals for the light-emitting elements are supplied via the electrical interface.
  • the light-emitting elements are designed as RGB LEDs.
  • RGB LEDs The advantage of RGB LEDs is the relatively high light intensity as well as their good integrability, so that the individual elements of the flexible display can be realized in multi-chip module technology.
  • the elements can also be designed as OLEDs.
  • a DA converter and an amplifier stage are arranged between the thermal interface and the electrical interface, which are arranged one above the other. This allows a compact structure that does not require additional space in the area.
  • an intermediate layer is arranged between the light-emitting elements and the amplifier stage, which comprises the thermal Interface and contacts and a first electrical isolation interface comprises.
  • the signals from the amplifier stage can then be looped through to the light-emitting elements via the contacts, wherein the heat loss of the light-emitting elements is dissipated via the thermal interface.
  • the electrical insulation interface in particular prevents electrical couplings between adjacent light-emitting elements.
  • a further intermediate layer which comprises a thermal interface, electrical contacts and an electrical insulation interface is arranged between the DA converter and the amplifier stage.
  • This intermediate layer is mainly used for the continuous heat dissipation and the necessary electrical connection between the electrical components.
  • a further intermediate layer is arranged between the DA converter and the electrical interface, which comprises a thermal interface, electrical contacts and an electrical insulation interface. This achieves compatibility between the layers with respect to their thermal expansion.
  • the electrical interface comprises a wiring plane and a contact plane. Further preferably, the electrical interface may be connected via an air interface to a data source.
  • a flexible spacer layer is arranged on the carrier film on which a slot mask is arranged, whereby a 3D representation similar to the autostereoscopic methods known from the prior art can be realized.
  • FIG. 1 is a schematic sectional view through a light-emitting element with its associated elements
  • FIG. 2 is a schematic plan view of a light-emitting element
  • Fig. 3 is a schematic plan view of a flexible display and 4 shows a schematic cross section through a flexible display with a slot mask.
  • a light-emitting element 1 is shown, which is associated with a diffused lens-like element 2.
  • the light-emitting element 1 and the diffuse lens-like element 2 are arranged inside a cylindrical, opaque separating layer 3, the side wall of which projects beyond the diffuse lenticular element 2 and thus prevents optical crosstalk between adjacent light-emitting elements 1.
  • a first intermediate layer is arranged, which comprises a thermal interface 4, electrical contacts 5 and an electrical insulation interface 6.
  • the thermal interface 4 the electrical power loss of the light-emitting element 4 is dissipated, wherein via the contacts 5 an electrical connection to an amplifier stage 7 is produced.
  • the electrical insulation interface 6 is used for electrical insulation of adjacent light-emitting elements 1.
  • the amplifier stage 7 is connected to a DA converter 8 via a second intermediate layer, which is constructed analogously to the first intermediate layer.
  • the elements of the second intermediate layer are therefore identified with the same reference numbers and an additional line.
  • the similar structure of the intermediate layers has in addition to a simple production and advantages in terms of thermal expansion behavior, so that tensions are avoided, which could be noticeable in a different emission behavior.
  • a third intermediate layer is arranged, to which the previously said also applies.
  • the electrical interface 9 represents the electrical connection to a control electronics, not shown.
  • the electrical interface 9 includes this purpose a wiring level and a contact plane. Alternatively, the connection can also be made via an air interface.
  • the control electronics then provides signals which light emitting element is to emit which color at which time.
  • the incoming digital control signals are then converted by the DA converter 8 into analog signals, amplified by the amplifier stage 7 and the light-emitting element
  • the light-emitting element 1 is designed as an RGB LED and comprises a red LED 11, a green LED 12 and a blue LED 13, which is shown schematically in Fig. 2.
  • the amplifier stage also provides three output signals for the three LEDs
  • the light-emitting elements 1 in modules, which are preferably interchangeable.
  • the modules then include, for example, 100 x 100 LEDs.
  • the control electronics then address the respective module via an address in a targeted manner, wherein the control of the individual light-emitting elements 1 of a module takes place in a time division multiplex. It is to be ensured that the temporary activation of a single light-emitting element 1 illuminates it for a sufficient time.
  • the effective capacity of the light-emitting element 1 is designed accordingly. This can be adjusted by correspondingly dimensioned feed lines and / or by additional capacitive structures and / or by discrete capacitors.
  • FIG. 3 shows a flexible display 14 comprising a flexible, transparent carrier film 15, on which a multiplicity of light-emitting elements 1 according to FIG. 1 are applied, wherein the carrier film 15 represents the visible surface.
  • the size and shape of the carrier film 15 or the number of light-emitting elements 1 can then be selected depending on the application, and due to the flexibility of the film also not planar applications pose no problem.
  • FIG. 4 An extended option is shown in FIG. 4.
  • a flexible spacer layer 16 is applied to the flexible carrier film 15, on which then a slit mask 17, for example, an LCD film, is applied. This can achieve an autostereoscopic effect.

Abstract

The invention relates to a flexible display (14), comprising a flexible, transparent mount film (15), with a multiplicity of light-emitting elements (1) being arranged on the mount film (15), in which case each light-emitting element (1) can emit at least three colours, in which case the colours can be switched on and off selectively, with each light-emitting element (1) having at least one associated diffuse lens-like element (2), by means of which the colours are mixed and the radiation is directed, with an opaque separating layer (3) being arranged between the light-emitting elements (1), and with at least one thermal and one electrical interface (4, 9) being arranged underneath the light-emitting elements (1).

Description

Flexibles DisplayFlexible display
Die Erfindung betrifft ein flexibles Display, insbesondere zur Verwendung als Kinoleinwand oder Theaterkulisse.The invention relates to a flexible display, in particular for use as a cinema screen or theater backdrop.
Derzeit sind 2D- und 3D-Auf- und Rückprojektierungsverfahren sowie automatische Displayverfahren bekannt, die auf Basis herkömmlicher Projektoren, Plasma- oder LCD-TV Geräten beruhen. Alle diese Verfahren setzen dabei starre Anwendungen voraus. Nachteilig an dem bekannten Verfahren ist, dass die erreichbaren Flächen entweder zu klein und nicht modular sind oder aber einen zu großen Flächenbedarf vor oder hinter der Leinwand benötigen.At present, 2D and 3D reconnaissance and projection methods are known, as well as automatic display methods based on conventional projectors, plasma or LCD TV sets. All of these methods require rigid applications. A disadvantage of the known method is that the achievable surfaces are either too small and not modular or require too large an area requirement in front of or behind the screen.
Aus der DE 100 15 796 A1 ist eine Beleuchtungsanordnung für ein autostereoskopisches Display bekannt, welche wahlweise auch eine weitestgehend homogene Beleuchtungswirkung haben kann, bestehend aus mindestens einer Lichtquelle, einer Maske und einer Vielzahl opaker und transparenter Flächenelemente und einem Array aus Wellenlängenfiltern, wobei die Maske eine der Struktur des Arrays von Wellenlängenfiltern korrespondierende Struktur aufweist, wobei opake Elemente des Arrays aus Wellenlängenfiltern auf der Maske in gleicher Form und Größe als opake Flächenelemente und nicht-opake Elemente des Arrays aus Wellenlängenfiltern auf der Maske in gleicher Form und Größe als transparente Flächenelemente ausgebildet werden, die opaken Elemente des Arrays aus Wellenlängenfiltern als steuernde Flächenelemente ausgebildet werden, zwischen dem Array aus Wellenlängenfiltern und der Maske ein steuerbar optisch doppelbrechend wirkendes Material der Dicke z, welches mit einer Ansteuerung versehen ist, angeordnet ist. Die der Maske zugewandte Oberfläche des Materials, auf die das von der Lichtquelle herrührende Licht einfällt, steht dabei schräg zur optischen Achse des Materials, wodurch die Beleuchtungsanordnung in Anordnungen zur autostereoskopischen Darstellung je nach eingestellter optisch doppelbrechender Wirkung des Materials vorteilhaft einen 2D- oder 3D-Beleuchtungsmodus ermöglicht.From DE 100 15 796 A1 a lighting arrangement for an autostereoscopic display is known, which optionally can also have a largely homogeneous illumination effect, consisting of at least one light source, a mask and a plurality of opaque and transparent surface elements and an array of wavelength filters, wherein the mask has a structure corresponding to the structure of the array of wavelength filters, wherein opaque elements of the array of wavelength filters on the mask in the same shape and size as opaque surface elements and non-opaque elements of the array of wavelength filters on the mask in the same shape and size as transparent surface elements be formed, the opaque elements of the array of wavelength filters as the controlling surface elements, between the array of wavelength filters and the mask a controllable optically birefringent-acting material of thickness z, which with a drive is provided is arranged. The mask-facing surface of the material on which the light originating from the light source is incident, is oblique to the optical axis of the material, whereby the illumination arrangement in arrangements for autostereoscopic display depending on the set optically birefringent effect of the material advantageously a 2D or 3D Lighting mode allows.
Aus der DE 103 11 389 A1 ist ein positionsadaptives, autostereoskopes SD- Wiedergabesystem bekannt.From DE 103 11 389 A1 a position-adaptive, autostereoscopic SD playback system is known.
Der Erfindung liegt das technische Problem zugrunde, ein flexibles Display zu schaffen, das hinsichtlich der Größe modular an unterschiedliche Größenverhältnisse anpassbar ist und insbesondere als Kinoleinwand, Panoramaleinwand oder Theaterkulisse verwendbar ist. Die Lösung des technischen Problems ergibt sich durch den Gegenstand mit den Merkmalen des Anspruchs 1. Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen.The invention is based on the technical problem of providing a flexible display that is modularly adaptable in terms of size to different size ratios and in particular can be used as a cinema screen, panoramic screen or theater scenery. The solution of the technical problem results from the subject matter with the features of claim 1. Further advantageous embodiments of the invention will become apparent from the dependent claims.
Hierzu umfasst das flexible Display eine flexible, transparente Trägerfolie, wobei auf der Trägerfolie eine Vielzahl von lichtemittierenden Elementen angeordnet sind. Jedes lichtemittierende Element kann mindestens in drei Farben emittieren, vorzugsweise Rot, Grün und Blau, wobei die Farben selektiv zu- oder abschaltbar sind. Jedem lichtemittierenden Element ist ein diffuses linsenartiges Element zugeordnet, mittels dessen die Farben gemischt und die Strahlung gerichtet wird, wobei zwischen den lichtemittierenden Elementen eine lichtundurchlässige Trennschicht angeordnet ist und unterhalb der lichtemittierenden Elemente mindestens ein thermisches Interface und ein elektrisches Interface angeordnet sind. Durch die flexible Trägerfolie kann das flexible Display an gewünschte Größen und Formen angepasst werden, wodurch auch große Leinwände oder Kulissen realisiert werden können. Die Auflösung des Displays hängt von der Größe und Dichte der lichtemittierenden Elemente ab. Insbesondere bei Großleinwänden kann dabei ein Abstand zwischen den lichtemittierenden Elementen im cm-Bereich liegen, was eine ausreichende Auflösung gewährleistet und technologisch gut handhabbar ist. Mittels der lichtundurchlässigen Trennschicht wird dabei ein unerwünschtes optisches Übersprechen zwischen zwei benachbarten lichtemittierenden Elementen vermieden. Über das thermische Interface kann dann die elektrische Verlustwärme der lichtemittierenden Elemente abgeleitet werden und über das elektrische Interface die Ansteuersignale für die lichtemittierenden Elemente zugeführt werden.For this purpose, the flexible display comprises a flexible, transparent carrier film, wherein a plurality of light-emitting elements are arranged on the carrier film. Each light-emitting element can emit at least three colors, preferably red, green and blue, the colors being selectively switchable on or off. Each light-emitting element is associated with a diffuse lenticular element, by means of which the colors are mixed and the radiation is directed, wherein between the light-emitting elements, an opaque separation layer is disposed and below the light-emitting elements at least one thermal interface and an electrical interface are arranged. Due to the flexible carrier foil, the flexible display can be adapted to desired sizes and shapes, whereby even large canvases or scenes can be realized. The resolution of the display depends on the size and density of the light-emitting elements. In particular, in large screens can be a distance between the light-emitting elements in the cm range, which ensures a sufficient resolution and is technologically easy to handle. By means of the opaque separating layer, an undesired optical crosstalk between two adjacent light-emitting elements is avoided. The electrical loss of heat of the light-emitting elements can then be dissipated via the thermal interface and the drive signals for the light-emitting elements are supplied via the electrical interface.
In einer bevorzugten Ausführungsform sind die lichtemittierenden Elemente als RGB-LEDs ausgebildet. Der Vorteil von RGB-LEDs ist die relativ hohe Lichtstärke sowie deren gute Integrierbarkeit, so dass die einzelnen Elemente des flexiblen Displays in Multi-Chip-Modul- Technik realisiert werden können. Alternativ können die Elemente auch als OLEDs ausgebildet sein.In a preferred embodiment, the light-emitting elements are designed as RGB LEDs. The advantage of RGB LEDs is the relatively high light intensity as well as their good integrability, so that the individual elements of the flexible display can be realized in multi-chip module technology. Alternatively, the elements can also be designed as OLEDs.
In einer weiteren bevorzugten Ausführungsform ist zwischen dem thermischen Interface und dem elektrischen Interface ein DA-Wandler und eine Verstärkerstufe angeordnet, die übereinander angeordnet sind. Dies ermöglicht einen kompakten Aufbau, der keinen zusätzlichen Bauraum in der Fläche benötigt.In a further preferred embodiment, a DA converter and an amplifier stage are arranged between the thermal interface and the electrical interface, which are arranged one above the other. This allows a compact structure that does not require additional space in the area.
In einer weiteren bevorzugten Ausführungsform ist zwischen den lichtemittierenden Elementen und der Verstärkerstufe eine Zwischenschicht angeordnet, die das thermische Interface sowie Kontakte und ein erstes elektrisches Isolationsinterface umfasst. Über die Kontakte können dann die Signale von der Verstärkerstufe zu den lichtemittierenden Elementen durchgeschleift werden, wobei über das thermische Interface die Verlustwärme der lichtemittierenden Elemente abgeleitet wird. Das elektrische Isolationsinterface verhindert hingegen insbesondere elektrische Kopplungen zwischen benachbarten lichtemittierenden Elementen.In a further preferred embodiment, an intermediate layer is arranged between the light-emitting elements and the amplifier stage, which comprises the thermal Interface and contacts and a first electrical isolation interface comprises. The signals from the amplifier stage can then be looped through to the light-emitting elements via the contacts, wherein the heat loss of the light-emitting elements is dissipated via the thermal interface. In contrast, the electrical insulation interface in particular prevents electrical couplings between adjacent light-emitting elements.
In einer weiteren bevorzugten Ausführungsform ist zwischen dem DA-Wandler und der Verstärkerstufe eine weitere Zwischenschicht angeordnet, die ein thermisches Interface, elektrische Kontakte und ein elektrisches Isolationsinterface umfasst. Diese Zwischenschicht dient vor allem der durchgängigen Wärmeableitung sowie der notwendigen elektrischen Verbindung zwischen den elektrischen Bauelementen.In a further preferred embodiment, a further intermediate layer which comprises a thermal interface, electrical contacts and an electrical insulation interface is arranged between the DA converter and the amplifier stage. This intermediate layer is mainly used for the continuous heat dissipation and the necessary electrical connection between the electrical components.
In einer weiteren bevorzugten Ausführungsform ist zwischen dem DA-Wandler und dem elektrischen Interface eine weitere Zwischenschicht angeordnet, die ein thermisches Interface, elektrische Kontakte und ein elektrisches Isolationsinterface umfasst. Hierdurch wird eine Kompatibilität zwischen den Schichten bezüglich ihrer thermischen Ausdehnung erreicht.In a further preferred embodiment, a further intermediate layer is arranged between the DA converter and the electrical interface, which comprises a thermal interface, electrical contacts and an electrical insulation interface. This achieves compatibility between the layers with respect to their thermal expansion.
Vorzugsweise umfasst das elektrische Interface eine Verdrahtungsebene und eine Kontaktebene. Weiter vorzugsweise kann das elektrische Interface über eine Luftschnittstelle mit einer Datenquelle verbunden sein.Preferably, the electrical interface comprises a wiring plane and a contact plane. Further preferably, the electrical interface may be connected via an air interface to a data source.
In einer weiteren bevorzugten Ausführungsform ist auf der Trägerfolie eine flexible Abstandsschicht angeordnet, auf der eine Schlitzmaske angeordnet ist, wodurch sich eine 3D-Darstellung ähnlich den aus dem Stand der Technik bekannten autostereoskopischen Verfahren realisieren lässt.In a further preferred embodiment, a flexible spacer layer is arranged on the carrier film on which a slot mask is arranged, whereby a 3D representation similar to the autostereoscopic methods known from the prior art can be realized.
Die Erfindung wird nachfolgend anhand eines bevorzugten Ausführungsbeispieles näher erläutert. Die Fig. zeigen:The invention will be explained in more detail with reference to a preferred embodiment. The figures show:
Fig. 1 eine schematische Schnittdarstellung durch ein lichtemittierendes Element mit seinen zugeordneten Elementen,1 is a schematic sectional view through a light-emitting element with its associated elements,
Fig. 2 eine schematische Draufsicht auf ein lichtemittierendes Element,2 is a schematic plan view of a light-emitting element,
Fig. 3 eine schematische Draufsicht auf ein flexibles Display und Fig. 4 einen schematischen Querschnitt durch ein flexibles Display mit einer Schlitzmaske.Fig. 3 is a schematic plan view of a flexible display and 4 shows a schematic cross section through a flexible display with a slot mask.
In der Fig. 1 ist ein lichtemittierendes Element 1 dargestellt, dem ein diffuses linsenartiges Element 2 zugeordnet ist. Das lichtemittierende Element 1 und das diffuse linsenartige Element 2 sind dabei innerhalb einer zylinderförmigen, lichtundurchlässigen Trennschicht 3 angeordnet, deren Seitenwand das diffuse linsenartige Element 2 überragt und somit ein optisches Übersprechen zwischen benachbarten lichtemittierenden Elementen 1 verhindert. Unterhalb des lichtemittierenden Elementes 1 ist eine erste Zwischenschicht angeordnet, die ein thermisches Interface 4, elektrische Kontakte 5 und ein elektrisches Isolationsinterface 6 umfasst. Mittels des thermischen Interfaces 4 wird die elektrische Verlustleistung des lichtemittierenden Elementes 4 abgeführt, wobei über die Kontakte 5 eine elektrische Verbindung zu einer Verstärkerstufe 7 hergestellt wird. Das elektrische Isolationsinterface 6 dient zur elektrischen Isolierung benachbarter lichtemittierender Elemente 1. Die Verstärkerstufe 7 ist über eine zweite Zwischenschicht, die analog der ersten Zwischenschicht aufgebaut ist, mit einem DA-Wandler 8 verbunden. Die Elemente der zweiten Zwischenschicht sind daher mit gleichen Bezugszahlen und einem zusätzlichen Strich gekennzeichnet. Der gleichartige Aufbau der Zwischenschichten hat dabei neben einer einfachen Fertigung auch Vorteile hinsichtlich des thermischen Ausdehnungsverhaltens, so dass Verspannungen vermieden werden, die sich in einem unterschiedlichen Abstrahlverhalten bemerkbar machen könnten. Zwischen dem DA- Wandler 8 und einem elektrischen Interface 9 ist eine dritte Zwischenschicht angeordnet, zu der das zuvor gesagte ebenfalls zutrifft. Das elektrische Interface 9 stellt die elektrische Verbindung zu einer nicht dargestellten Steuerelektronik dar. Das elektrische Interface 9 umfasst hierzu eine Verdrahtungsebene und eine Kontaktebene. Alternativ kann die Verbindung auch über eine Luftschnittstelle erfolgen. Die Ansteuerelektronik liefert dann Signale, welches lichtemittierende Element welche Farbe zu welchem Zeitpunkt abstrahlen soll. Die ankommenden digitalen Steuersignale werden dann vom DA-Wandler 8 in analoge Signale gewandelt, durch die Verstärkerstufe 7 verstärkt und dem lichtemittierenden ElementIn Fig. 1, a light-emitting element 1 is shown, which is associated with a diffused lens-like element 2. The light-emitting element 1 and the diffuse lens-like element 2 are arranged inside a cylindrical, opaque separating layer 3, the side wall of which projects beyond the diffuse lenticular element 2 and thus prevents optical crosstalk between adjacent light-emitting elements 1. Below the light-emitting element 1, a first intermediate layer is arranged, which comprises a thermal interface 4, electrical contacts 5 and an electrical insulation interface 6. By means of the thermal interface 4, the electrical power loss of the light-emitting element 4 is dissipated, wherein via the contacts 5 an electrical connection to an amplifier stage 7 is produced. The electrical insulation interface 6 is used for electrical insulation of adjacent light-emitting elements 1. The amplifier stage 7 is connected to a DA converter 8 via a second intermediate layer, which is constructed analogously to the first intermediate layer. The elements of the second intermediate layer are therefore identified with the same reference numbers and an additional line. The similar structure of the intermediate layers has in addition to a simple production and advantages in terms of thermal expansion behavior, so that tensions are avoided, which could be noticeable in a different emission behavior. Between the DA converter 8 and an electrical interface 9, a third intermediate layer is arranged, to which the previously said also applies. The electrical interface 9 represents the electrical connection to a control electronics, not shown. The electrical interface 9 includes this purpose a wiring level and a contact plane. Alternatively, the connection can also be made via an air interface. The control electronics then provides signals which light emitting element is to emit which color at which time. The incoming digital control signals are then converted by the DA converter 8 into analog signals, amplified by the amplifier stage 7 and the light-emitting element
I zugeführt. Das lichtemittierende Element 1 ist dabei als RGB-LED ausgebildet und umfasst eine rote LED 11, eine grüne LED 12 und eine blaue LED 13, was in Fig. 2 schematisch dargestellt ist. Somit liefert auch die Verstärkerstufe drei Ausgangssignale für die drei LEDsI fed. The light-emitting element 1 is designed as an RGB LED and comprises a red LED 11, a green LED 12 and a blue LED 13, which is shown schematically in Fig. 2. Thus, the amplifier stage also provides three output signals for the three LEDs
I I bis 13.I to 13.
Insbesondere bei einer Luftschnittstelle zwischen elektrischem Interface 9 und der Steuerelektronik, beispielsweise über Funk, ist es vorteilhaft die lichtemittierenden Elemente 1 in Module zusammenzufassen, die vorzugsweise auswechselbar sind. Die Module umfassen dann beispielsweise 100 x 100 LEDs. Die Steuerelektronik spricht dann über eine Adresse das jeweilige Modul gezielt an, wobei die Ansteuerung der einzelnen lichtemittierenden Elemente 1 eines Moduls im Zeitmultiplex erfolgt. Dabei ist sicherzustellen, dass durch die temporäre Ansteuerung eines einzelnen lichtemittierenden Elementes 1 dieses ausreichend lange leuchtet. Vorzugsweise wird daher die wirksame Kapazität des lichtemittierenden Elementes 1 entsprechend ausgelegt. Dies kann durch entsprechende dimensionierte Zuleitungen und/oder durch zusätzliche kapazitive Strukturen und/oder durch diskrete Kondensatoren eingestellt werden.Particularly in the case of an air interface between the electrical interface 9 and the control electronics, for example by radio, it is advantageous for the light-emitting elements 1 in modules, which are preferably interchangeable. The modules then include, for example, 100 x 100 LEDs. The control electronics then address the respective module via an address in a targeted manner, wherein the control of the individual light-emitting elements 1 of a module takes place in a time division multiplex. It is to be ensured that the temporary activation of a single light-emitting element 1 illuminates it for a sufficient time. Preferably, therefore, the effective capacity of the light-emitting element 1 is designed accordingly. This can be adjusted by correspondingly dimensioned feed lines and / or by additional capacitive structures and / or by discrete capacitors.
In der Fig. 3 ist ein flexibles Display 14 dargestellt, umfassend eine flexible, transparente Trägerfolie 15, auf die eine Vielzahl von lichtemittierenden Elementen 1 gemäß Fig. 1 aufgebracht sind, wobei die Trägerfolie 15 die sichtbare Oberfläche darstellt. Die Größe und Form der Trägerfolie 15 bzw. die Anzahl der lichtemittierenden Elemente 1 kann dann je nach Anwendungsfall gewählt werden, wobei aufgrund der Flexibilität der Folie auch nicht planare Anwendungen kein Problem darstellen.FIG. 3 shows a flexible display 14 comprising a flexible, transparent carrier film 15, on which a multiplicity of light-emitting elements 1 according to FIG. 1 are applied, wherein the carrier film 15 represents the visible surface. The size and shape of the carrier film 15 or the number of light-emitting elements 1 can then be selected depending on the application, and due to the flexibility of the film also not planar applications pose no problem.
Eine erweiterte Möglichkeit ist in Fig. 4 dargestellt. Dabei wird auf die flexible Trägerfolie 15 eine flexible Abstandsschicht 16 aufgebracht, auf der dann eine Schlitzmaske 17, beispielsweise eine LCD-Folie, aufgebracht ist. Hierdurch lässt sich ein autostereoskopischer Effekt erreichen. An extended option is shown in FIG. 4. In this case, a flexible spacer layer 16 is applied to the flexible carrier film 15, on which then a slit mask 17, for example, an LCD film, is applied. This can achieve an autostereoscopic effect.

Claims

Patentansprüche claims
1. Flexibles Display (14), umfassend eine flexible, transparente Trägerfolie (15), wobei auf der Trägerfolie (15) eine Vielzahl von lichtemittierenden Elementen (1) angeordnet sind, jedes lichtemittierende Element (1) in mindestens drei Farben emittieren kann, wobei die Farben selektiv zu- oder abschaltbar sind, jedem lichtemittierenden Element (1 ) mindestens ein diffuses linsenartiges Element (2) zugeordnet ist, mittels dessen die Farben gemischt und die Strahlung gerichtet wird, wobei zwischen den lichtemittierenden Elementen (1) eine lichtundurchlässige Trennschicht (3) angeordnet ist, und unterhalb der lichtemittierenden Elemente (1) mindestens ein thermisches und ein elektrisches Interface (4, 9) angeordnet sind.A flexible display (14) comprising a flexible transparent carrier sheet (15), wherein on the carrier sheet (15) a plurality of light emitting elements (1) are arranged to emit each light emitting element (1) in at least three colors, wherein the colors are selectively switched on or off, each light-emitting element (1) at least one diffused lens-like element (2) is assigned, by means of which the colors are mixed and the radiation is directed, wherein between the light-emitting elements (1) an opaque separation layer (3 ), and below the light-emitting elements (1) at least one thermal and an electrical interface (4, 9) are arranged.
2. Flexibles Display nach Anspruch 1 , dadurch gekennzeichnet, dass lichtemittierende Element (1 ) als RGB-LED ausgebildet ist.2. Flexible display according to claim 1, characterized in that the light-emitting element (1) is designed as an RGB LED.
3. Flexibles Display nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das zwischen dem thermischen Interface (4) und dem elektrischen Interface (9) ein DA- Wandler (8) und eine Verstärkerstufe (7) angeordnet sind, die übereinander angeordnet sind.3. Flexible display according to claim 1 or 2, characterized in that between the thermal interface (4) and the electrical interface (9), a DA converter (8) and an amplifier stage (7) are arranged, which are arranged one above the other.
4. Flexibles Display nach Anspruch 3, dadurch gekennzeichnet, dass zwischen dem lichtemittierenden Element (1) und der Verstärkerstufe (7) eine Zwischenschicht angeordnet ist, die das thermische Interface (4) sowie Kontakte (5) und ein erstes elektrisches Isolationsinterface (6) umfasst.4. Flexible display according to claim 3, characterized in that between the light-emitting element (1) and the amplifier stage (7) an intermediate layer is arranged, the thermal interface (4) and contacts (5) and a first electrical insulation interface (6). includes.
5. Flexibles Display nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass zwischen dem DA-Wandler (8) und der Verstärkerstufe (7) eine weitere Zwischenschicht angeordnet ist, die ein thermisches Interface (4'), elektrische Kontakte (5') und ein elektrisches Isolationsinterface (6') umfasst.5. Flexible display according to claim 3 or 4, characterized in that between the DA converter (8) and the amplifier stage (7), a further intermediate layer is arranged, which has a thermal interface (4 '), electrical contacts (5') and an electrical isolation interface (6 ').
6. Flexibles Display nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, dass zwischen dem DA-Wandler (8) und dem elektrischen Interface (9) eine weitere Zwischenschicht angeordnet ist, die ein thermisches Interface (4"), elektrische Kontakte (5") und ein elektrisches Isolationsinterface (6") umfasst. 6. Flexible display according to one of claims 3 to 5, characterized in that between the DA converter (8) and the electrical interface (9), a further intermediate layer is arranged, which has a thermal interface (4 "), electrical contacts (5 ") and an electrical isolation interface (6").
7. Flexibles Display nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass das elektrische Interface (9) eine Verdrahtungsebene und eine Kontaktebene umfasst oder eine Luftschnittstelle aufweist.7. Flexible display according to one of the preceding claims, characterized in that the electrical interface (9) comprises a wiring level and a contact plane or has an air interface.
8. Flexibles Display nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass auf der Trägerfolie (15) eine flexible Abstandsschicht (16) angeordnet ist, auf der eine Schlitzmaske (17) angeordnet ist.8. Flexible display according to one of the preceding claims, characterized in that on the carrier film (15) a flexible spacer layer (16) is arranged, on which a slit mask (17) is arranged.
9. Flexibles Display nach Anspruch 8, dadurch gekennzeichnet, dass die Breite der Schlitze verstellbar ist. 9. Flexible display according to claim 8, characterized in that the width of the slots is adjustable.
PCT/EP2006/011376 2006-01-30 2006-11-15 Flexible display WO2007085286A1 (en)

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DE102006004825.3 2006-01-30
DE200610004825 DE102006004825B3 (en) 2006-01-30 2006-01-30 Display for use as theatre coulisse, has light emitting units arranged on flexible carrier foil, and cylindrical, opaque separation layer arranged between units, where each unit emits three colors and attached to lens-like unit

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