WO2004086527A1 - Multi-functional sensor display - Google Patents

Multi-functional sensor display Download PDF

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Publication number
WO2004086527A1
WO2004086527A1 PCT/EP2004/001551 EP2004001551W WO2004086527A1 WO 2004086527 A1 WO2004086527 A1 WO 2004086527A1 EP 2004001551 W EP2004001551 W EP 2004001551W WO 2004086527 A1 WO2004086527 A1 WO 2004086527A1
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WO
WIPO (PCT)
Prior art keywords
display
photodetector array
display according
photodetector
active layer
Prior art date
Application number
PCT/EP2004/001551
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German (de)
French (fr)
Inventor
Christoph Brabec
Original Assignee
Siemens Aktiengesellschaft
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Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to EP04712005A priority Critical patent/EP1609192A1/en
Publication of WO2004086527A1 publication Critical patent/WO2004086527A1/en

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Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K65/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element and at least one organic radiation-sensitive element, e.g. organic opto-couplers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K39/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic radiation-sensitive element covered by group H10K30/00
    • H10K39/30—Devices controlled by radiation
    • H10K39/32—Organic image sensors
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
    • H10K30/20—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation comprising organic-organic junctions, e.g. donor-acceptor junctions
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
    • H10K30/451—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation comprising a metal-semiconductor-metal [m-s-m] structure

Definitions

  • the invention relates to a display and a device with a display.
  • the invention has for its object to provide a display that has added value compared to conventional displays.
  • the display has a large number of photodetectors in the form of a photodetector array.
  • the optoelectronically active material used in each case is preferably an organic material both in the display and in the photodetector array.
  • the display is advantageously an organic, polymer-based display and the photodetector array is preferably based on conjugated polymers. Accordingly, the display contains in particular one or more organic light-emitting diodes (OLEDs) and the photodetector array contains one or more organic photodetectors.
  • OLEDs organic light-emitting diodes
  • the photodetector array is preferably essentially transparent or semi-transparent. As a result, the photodetector array can be arranged in front of the display without covering it.
  • the photodetector array can also be integrated in the display.
  • use the pixels on the display and the photodetectors of the photodetector array each have the same optoelectronically active layer.
  • This optoelectronically active layer can then be operated with a forward voltage or a reverse voltage to choose between a mode in which the display emits light and a mode in which the photodetectors detect light.
  • the optoelectronically active layer is therefore operated either as a light-emitting layer or as a photoactive layer.
  • each pixel of the display and a photodetector of the photodetector array also have a common electrode, common intermediate layers and a common counter electrode.
  • the display has in particular 10 or more pixels that can be operated as photo detectors. In particular, all pixels of the display can be operated as photo detectors.
  • the optoelectronically active layer can in particular contain polythiophenes or consist of polythiophenes.
  • the display In a method for operating a display which has a photodetector array, the display is switched between a light-emitting mode and a photodetector mode.
  • Advantageous refinements of the method result analogously to the advantageous refinements of the device.
  • Figure 2 shows an integrated solution.
  • 1 shows a discrete solution that is created by externally connecting two independent components.
  • Organic photodetectors have the advantage that they can be made semi-transparent. This makes it possible to place a photodetector array 20 over a display 10, with only slight loss of light (filter effect) of the display.
  • this solution is technically relatively complex and requires the manufacture, connection and packaging of two individual components.
  • FIG. 2 shows an integrated solution in which a component has multiple functionality.
  • a pixel of an organic display typically consists of a layer structure in which the following layers are arranged next to one another: an electrode 1, one or more
  • An organic photodetector has the same structure, except that a photoactive layer is used as the optoelectronically active layer 3 instead of the emitting layer. The difference is that the photodetector is operated in reverse voltage, while the display (light emission) is operated in forward voltage.
  • a compromise in the choice of materials, i.e. polymers that have sufficient performance in both light-emitting and photodetector modes, allows a component to be produced that fulfills both the function of a display and the function of a photodetector array. By choosing the operating voltage, you can select the different functionality.
  • the class of polythiophenes may be mentioned as an example of polymers for which both functional variants, that is to say organic light-emitting diodes (OLEDs) or photodetectors, are possible.
  • the result is a polymer-based multifunction sensor display that emits light in normal OLED mode and detects light in photodetector mode.

Abstract

An organic display additionally has the functionality of a photodetector array.

Description

Beschreibungdescription
Multifunktions-Sensor-DisplayMultifunction sensor display
Die Erfindung betrifft ein Display und eine Vorrichtung mit einem Display.The invention relates to a display and a device with a display.
Der Erfindung liegt die Aufgabe zugrunde, ein Display zur Verfügung zu stellen, das gegenüber konventionellen Displays einen Mehrwert aufweist.The invention has for its object to provide a display that has added value compared to conventional displays.
Diese Aufgabe wird durch die in den unabhängigen Ansprüchen angegebenen Erfindungen gelöst. Vorteilhafte Ausgestaltungen ergeben sich aus den Unteransprüchen.This object is achieved by the inventions specified in the independent claims. Advantageous refinements result from the subclaims.
Dementsprechend weist das Display eine Vielzahl von Fotodetektoren in Form eines Fotodetektorarrays auf.Accordingly, the display has a large number of photodetectors in the form of a photodetector array.
Vorzugsweise ist sowohl beim Display als auch beim Fotodetektorarray das jeweils verwendete optoelektronisch aktive Material ein organisches Material. Das Display ist vorteilhaft ein organisches, polymerbasiertes Display und das Fotodetektorarray basiert vorzugsweise auf konjugierten Polymeren. Dementsprechend enthält das Display insbesondere eine oder mehrere organische Licht emittierende Dioden (OLEDs) und das Fotodetektorarray einen oder mehrere organische Fotodetektoren.The optoelectronically active material used in each case is preferably an organic material both in the display and in the photodetector array. The display is advantageously an organic, polymer-based display and the photodetector array is preferably based on conjugated polymers. Accordingly, the display contains in particular one or more organic light-emitting diodes (OLEDs) and the photodetector array contains one or more organic photodetectors.
Das Fotodetektorarray ist vorzugsweise im Wesentlichen transparent oder semitransparent ausgeführt. Dadurch kann das Fotodetektorarray vor dem Display angeordnet sein, ohne dieses zu verdecken.The photodetector array is preferably essentially transparent or semi-transparent. As a result, the photodetector array can be arranged in front of the display without covering it.
Anstelle eines diskreten Aufbaus, bei dem das Fotodetektorarray vor dem Display angeordnet ist oder umgekehrt, kann das Fotodetektorarray auch in das Display integriert sein. Dazu verwenden die Pixel des Displays und die Fotodetektoren des Fotodetektorarrays jeweils dieselbe optoelektronisch aktive Schicht. Diese optoelektronisch aktive Schicht kann dann zur Wahl zwischen einem Modus, in dem das Display Licht emittiert, und einem Modus, in dem die Fotodetektoren Licht detektieren, wahlweise mit einer VorwärtsSpannung oder mit einer RückwärtsSpannung betrieben werden. Die optoelektronisch aktive Schicht wird also wahlweise als Licht emittierende Schicht oder als fotoaktive Schicht betrieben.Instead of a discrete structure in which the photodetector array is arranged in front of the display or vice versa, the photodetector array can also be integrated in the display. To do this, use the pixels on the display and the photodetectors of the photodetector array each have the same optoelectronically active layer. This optoelectronically active layer can then be operated with a forward voltage or a reverse voltage to choose between a mode in which the display emits light and a mode in which the photodetectors detect light. The optoelectronically active layer is therefore operated either as a light-emitting layer or as a photoactive layer.
Vorzugsweise verfügen jeweils ein Pixel des Displays und ein Fotodetektor des Fotodetektorarrays auch über eine gemeinsame Elektrode, gemeinsame Zwischenschichten und eine gemeinsame Gegenelektrode .Preferably, each pixel of the display and a photodetector of the photodetector array also have a common electrode, common intermediate layers and a common counter electrode.
Das Display weist insbesondere 10 oder mehr Pixel auf, die als Fotodetektoren betrieben werden können. Insbesondere sind alle Pixel des Displays als Fotodetektoren betreibbar.The display has in particular 10 or more pixels that can be operated as photo detectors. In particular, all pixels of the display can be operated as photo detectors.
Hierzu kann die optoelektronisch aktive Schicht insbesondere Polythiophene enthalten oder aus Polythiophenen bestehen.For this purpose, the optoelectronically active layer can in particular contain polythiophenes or consist of polythiophenes.
In einem Verfahren zum Betreiben eines Displays, das ein Fotodetektorarray aufweist, wird das Display zwischen einem Licht emittierenden Modus und einem Fotodetektor-Modus umgeschaltet. Vorteilhafte Ausgestaltungen des Verfahrens ergeben sich analog zu den vorteilhaften Ausgestaltungen der Vorrichtung.In a method for operating a display which has a photodetector array, the display is switched between a light-emitting mode and a photodetector mode. Advantageous refinements of the method result analogously to the advantageous refinements of the device.
Weitere Vorteile und Merkmale der Erfindung ergeben sich aus der Beschreibung eines Ausführungsbeispiels anhand der Zeichnung. Dabei zeigt:Further advantages and features of the invention result from the description of an exemplary embodiment with reference to the drawing. It shows:
Figur 1 eine diskrete Lösung;Figure 1 shows a discrete solution;
Figur 2 eine integrierte Lösung. In Figur 1 erkennt man eine diskrete Lösung, die durch externe Verbindung zweier unabhängiger Bauteile entsteht. Organische Fotodetektoren haben den Vorteil, dass sie semitransparent ausgeführt werden können. Dadurch ist es möglich, ein Fotodetektorarray 20 über ein Display 10 zu legen, wobei es nur zu geringen Lichteinbußen (Filtereffekt) des Displays kommt. Diese Lösung ist technisch allerdings relativ aufwändig und verlangt die Herstellung, Verbindung und Verpackung von zwei einzelnen Bauteilen.Figure 2 shows an integrated solution. 1 shows a discrete solution that is created by externally connecting two independent components. Organic photodetectors have the advantage that they can be made semi-transparent. This makes it possible to place a photodetector array 20 over a display 10, with only slight loss of light (filter effect) of the display. However, this solution is technically relatively complex and requires the manufacture, connection and packaging of two individual components.
In Figur 2 ist eine integrierte Lösung dargestellt, bei der ein Bauteil eine Mehrfachfunktionalität aufweist. Ein Pixel eines organischen Displays besteht typischerweise aus einem Schichtaufbau, in dem folgende Schichten aneinander angeordnet sind: Eine Elektrode 1, eine oder mehrereFIG. 2 shows an integrated solution in which a component has multiple functionality. A pixel of an organic display typically consists of a layer structure in which the following layers are arranged next to one another: an electrode 1, one or more
Zwischenschichten 2 (Transportlayer) , eine oder mehrere emittierenden Schichten als optoelektronisch aktive Schicht 3, eine oder mehrere Transportlayer 4 und eine Gegenelektrode 5 zum Abschluss. Ein organischer Fotodetektor besitzt den gleichen Aufbau, nur dass statt der emittierenden Schicht als optoelektronisch aktive Schicht 3 eine fotoaktive Schicht verwendet wird. Der Unterschied besteht darin, dass der Fotodetektor in Rückwärtsspannung betrieben wird, während das Display (Lichtemission) bei Vorwärtsspannung betrieben wird. Durch einen Kompromiss bei der Materialwahl, also durch Polymere, die eine hinreichende Performance sowohl im Licht emittierenden als auch im Fotodetektor-Modus haben, kann man ein Bauteil herstellen, das sowohl die Funktion eines Displays als auch die Funktion eines Fotodetektorarrays erfüllt. Durch die Wahl der Betriebsspannung kann man die unterschiedliche Funktionalität auswählen. Als Beispiel für Polymere, für die beide Funktionsvarianten, also organische Licht emittierende Diode (OLED) oder Fotodetektor, möglich sind, sei die Klasse der Polythiophene genannt.Intermediate layers 2 (transport layers), one or more emitting layers as optoelectronically active layer 3, one or more transport layers 4 and a counter electrode 5 at the end. An organic photodetector has the same structure, except that a photoactive layer is used as the optoelectronically active layer 3 instead of the emitting layer. The difference is that the photodetector is operated in reverse voltage, while the display (light emission) is operated in forward voltage. A compromise in the choice of materials, i.e. polymers that have sufficient performance in both light-emitting and photodetector modes, allows a component to be produced that fulfills both the function of a display and the function of a photodetector array. By choosing the operating voltage, you can select the different functionality. The class of polythiophenes may be mentioned as an example of polymers for which both functional variants, that is to say organic light-emitting diodes (OLEDs) or photodetectors, are possible.
Es ist zu bemerken, dass diese integrierte Lösung außerordentlich attraktiv ist, da die OLED-Display- Technologie beinahe direkt übernommen werden kann. Ohne Mehrkosten wird dabei ein deutlicher Mehrwert addiert.It should be noted that this integrated solution is extremely attractive because the OLED display Technology can be adopted almost directly. A clear added value is added without additional costs.
Es entsteht so ein polymerbasiertes Multifunktions-Sensor- Display, das im normalen OLED-Modus Licht emittiert und im Fotodetektor-Modus Licht detektiert. The result is a polymer-based multifunction sensor display that emits light in normal OLED mode and detects light in photodetector mode.

Claims

Patentansprüche claims
1. Display, dadurch gekennzeichnet, dass das Display (10; 1, 2, 3, 4, 5) ein Fotodetektorarray (20; 1, 2, 3, 4, 5) aufweist.1. Display, characterized in that the display (10; 1, 2, 3, 4, 5) has a photo detector array (20; 1, 2, 3, 4, 5).
2. Display nach Anspruch 1, dadurch gekennzeichnet, dass das Display (10; 1, 2, 3, 4, 5) eine organische Licht emittierende Diode (OLED) enthält.2. Display according to claim 1, characterized in that the display (10; 1, 2, 3, 4, 5) contains an organic light-emitting diode (OLED).
3. Display nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Fotodetektorarray (20; 1, 2, 3, 4, 5) einen organischen Fotodetektor enthält.3. Display according to claim 1 or 2, characterized in that the photodetector array (20; 1, 2, 3, 4, 5) contains an organic photodetector.
4. Display nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Fotodetektorarray (20; 1, 2, 3, 4, 5) transparent oder semitransparent ist.4. Display according to one of the preceding claims, characterized in that the photodetector array (20; 1, 2, 3, 4, 5) is transparent or semi-transparent.
5. Display nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Fotodetektorarray (20) vor dem Display (10) angeordnet ist.5. Display according to one of the preceding claims, characterized in that the photodetector array (20) is arranged in front of the display (10).
6. Display nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Fotodetektorarray (1, 2, 3, 4, 5) in das Display (1, 2, 3, 4, 5) integriert ist.6. Display according to one of the preceding claims, characterized in that the photodetector array (1, 2, 3, 4, 5) is integrated in the display (1, 2, 3, 4, 5).
7. Display nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Display und das Fotodetektorarray eine gemeinsame optoelektronisch aktive Schicht (3) haben. 7. Display according to one of the preceding claims, characterized in that the display and the photodetector array have a common optoelectronically active layer (3).
8. Display nach Anspruch 7, dadurch gekennzeichnet, dass die optoelektronisch aktive Schicht (3) wahlweise mit VorwärtsSpannung oder mit Rückwärtsspannung betreibbar ist.8. Display according to claim 7, characterized in that the optoelectronically active layer (3) can be operated either with forward voltage or with reverse voltage.
9. Display nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass die optoelektronisch aktive Schicht (3) wahlweise als emittierende Schicht oder als fotoaktive Schicht betreibbar ist.9. Display according to claim 7 or 8, characterized in that the optoelectronically active layer (3) can be operated either as an emitting layer or as a photoactive layer.
10. Display nach einem der Ansprüche 7 bis 9, dadurch gekennzeichnet, dass die optoelektronisch aktive Schicht (3) polythiophenhaltig ist.10. Display according to one of claims 7 to 9, characterized in that the optoelectronically active layer (3) contains polythiophene.
11. Verfahren zum Betreiben eines Displays (10; 1, 2, 3, 4, 5), das ein Fotodetektorarray (20; 1, 2, 3, 4, 5) aufweist, bei dem das Display zwischen einem Licht emittierenden Modus und einem Fotodetektor-Modus umgeschaltet wird. 11. A method for operating a display (10; 1, 2, 3, 4, 5), which has a photodetector array (20; 1, 2, 3, 4, 5), in which the display between a light-emitting mode and a Photo detector mode is switched.
PCT/EP2004/001551 2003-03-28 2004-02-18 Multi-functional sensor display WO2004086527A1 (en)

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DE10314164 2003-03-28

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
US8513612B2 (en) 2009-04-22 2013-08-20 Koninklijke Philips N.V. Imaging measurement system with a printed organic photodiode array
WO2013164015A1 (en) * 2012-04-30 2013-11-07 Barco N.V. A display integrated semitransparent sensor system and use thereof
US10115000B2 (en) 2015-12-11 2018-10-30 Synaptics Incorporated Method and system for optical imaging using patterned illumination

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8513612B2 (en) 2009-04-22 2013-08-20 Koninklijke Philips N.V. Imaging measurement system with a printed organic photodiode array
WO2013164015A1 (en) * 2012-04-30 2013-11-07 Barco N.V. A display integrated semitransparent sensor system and use thereof
US10115000B2 (en) 2015-12-11 2018-10-30 Synaptics Incorporated Method and system for optical imaging using patterned illumination
US10366268B2 (en) 2015-12-11 2019-07-30 Synaptics Incorporated Method and system for optical imaging using patterned illumination

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