DE10042500A1 - Electroluminescent display - Google Patents
Electroluminescent displayInfo
- Publication number
- DE10042500A1 DE10042500A1 DE10042500A DE10042500A DE10042500A1 DE 10042500 A1 DE10042500 A1 DE 10042500A1 DE 10042500 A DE10042500 A DE 10042500A DE 10042500 A DE10042500 A DE 10042500A DE 10042500 A1 DE10042500 A1 DE 10042500A1
- Authority
- DE
- Germany
- Prior art keywords
- electroluminescent display
- unit
- lighting unit
- display according
- electrodes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000003990 capacitor Substances 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- -1 For example Substances 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/04—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions
- G09G3/06—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources
- G09G3/12—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources using electroluminescent elements
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F13/00—Illuminated signs; Luminous advertising
- G09F13/20—Illuminated signs; Luminous advertising with luminescent surfaces or parts
- G09F13/22—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B44/00—Circuit arrangements for operating electroluminescent light sources
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/041—Temperature compensation
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/043—Preventing or counteracting the effects of ageing
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Computer Hardware Design (AREA)
- Electroluminescent Light Sources (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
Abstract
Description
Die Erfindung bezieht sich auf ein Elektrolumineszenz-Display mit einer Leuchteinheit, umfassend eine zwischen zwei ansteuerbar geschalteten Elektroden angeordnete elektrolumineszierende Schicht.The invention relates to an electroluminescent display with a Luminous unit, comprising a switchable connected between two Electroluminescent layer arranged on electrodes.
Solche Elektrolumineszenz-Displays werden zu Beleuchtungs- und Anzeigezwecken eingesetzt. Zu Beleuchtungszwecken, beispielsweise zum Darstellen einer Funktionssymbolik in einer Bedieneinheit, wie etwa einem Schalter, wird ein solches Display anstelle anderer Beleuchtungsmittel wie Glühlampen oder LEDs eingesetzt. Neben der vorteilhaften Eigenschaft, über größere Flächenbereiche eine sehr homogene Leuchtdichteverteilung zu erzeugen, bietet vor allem die Möglichkeit der sehr flachen Ausführung dieser Lichtquelle völlig neue Gestaltungsfreiheiten. Die Darstellung einer Funktionssymbolik erfolgt z. B. durch eine die Displayoberfläche unter Freilassung der gewünschten Kontur lichtundurchlässig abdeckende Maske. Such electroluminescent displays become lighting and Display purposes used. For lighting purposes, for example Represent a function symbol in an operating unit, such as one Switch, such a display will be used instead of other lighting Incandescent lamps or LEDs are used. In addition to the beneficial property, about larger areas have a very homogeneous luminance distribution generate, offers above all the possibility of very flat execution of this Light source completely new design freedom. The representation of a Functional symbols are used e.g. B. by a the display surface under Release the desired contour opaque mask.
Das Elektrolumineszenz-Display selbst besteht aus einem Schichtstapel, beginnend mit einer Metallelektrode, auf der ein Dielektrikum aufgetragen ist. Auf dem Dielektrikum befindet sich die eigentliche elektolumineszierende Schicht, die wiederum von einer zweiten Elektrode bedeckt ist. Die weiteren, die elektrolumineszierende Schicht bedeckenden Schichten sind transparent für die durch die elektrolumineszierende Schicht emittierten Lichtstrahlen ausgebildet. Zum Schutz der Einheit ist die transparente Elektrode i. a. mit einem Deckglas oder einer transparenten Trägerfolie abgedeckt. Als Elektrolumineszenzschichten können anorganische Materialien wie beispielsweise Phosphor oder organische Materialien eingesetzt werden, die in Abhängigkeit von der Wellenlänge des zu erzeugenden Lichtes unterschiedlich dotiert sein können.The electroluminescent display itself consists of a layer stack, starting with a metal electrode on which a dielectric is applied. The actual electroluminescent is located on the dielectric Layer, which in turn is covered by a second electrode. The others the layers covering the electroluminescent layer are transparent for the light rays emitted by the electroluminescent layer educated. To protect the unit, the transparent electrode i. a. With covered with a cover slip or a transparent carrier film. As Electroluminescent layers can be inorganic materials such as For example, phosphorus or organic materials are used, which in Depends on the wavelength of the light to be generated can be endowed.
Neben ihren unübersehbaren Vorteilen weisen Elektrolumineszenz-Displays jedoch einige lichttechnische Eigenschaften auf, die ihre Einsetzbarkeit insbesondere für Anwendungen im Automobilbereich stark einschränken. So weisen die z. Zt. verfügbaren Elektrolumineszenzschichten noch eine relativ deutliche Minderung ihrer Lichtleistung in Abhängigkeit ihrer Lebensdauer sowie eine starke Abhängigkeit der abgestrahlten Lichtstärke und -farbe von der Umgebungstemperatur auf. Diesen unerwünschten Änderungen könnte zwar durch gezieltes Nachregeln der Betriebsparameter Versorgungsspannung und -frequenz entgegengewirkt werden, wozu allerdings eine Erfassung des aktuellen Leuchtzustandes des Displays erforderlich ist.In addition to their unmistakable advantages, electroluminescent displays feature however, some lighting properties indicate its applicability severely restrict especially for automotive applications. So have the z. Currently available electroluminescent layers are still a relative significant reduction in their light output depending on their lifespan as well as a strong dependence of the emitted light intensity and color on the ambient temperature. These unwanted changes could through targeted readjustment of the supply voltage operating parameters and frequency are counteracted, for which purpose, however, a detection of the current lighting status of the display is required.
Ausgehend von diesem Stand der Technik liegt der Erfindung daher die Aufgabe zugrunde, ein Elektrolumineszenz-Display zu schaffen, das um Mittel zur Erfassung des aktuellen Leuchtzustandes erweitert ist, ohne dabei dessen besondere Vorteile, insbesondere hinsichtlich des flächigen Aufbaus einzubüßen. Based on this prior art, the invention is therefore the The task is to create an electroluminescent display that is medium is expanded to detect the current lighting state without doing so special advantages, especially with regard to the flat structure losing.
Diese Aufgabe wird dadurch gelöst, daß der Leuchteinheit auf der Seite ihrer transparenten Elektrode gegenüberliegend eine Detektoreinheit zugeordnet ist, die ebenfalls durch eine zwischen zwei Elektroden angeordnete elektrolumineszierende Schicht gebildet ist, wobei zumindest die der transparenten Elektrode der Leuchteinheit zugewandte Elektrode transparent ausgebildet ist.This object is achieved in that the lighting unit on the side of it a detector unit is assigned opposite the transparent electrode, which is also arranged between two electrodes electroluminescent layer is formed, at least that of transparent electrode of the lighting unit facing electrode transparent is trained.
Um weiterhin den größten Teil der Displayoberfläche zur Lichtabstrahlung nutzen zu können ist vorteilhaft vorgesehen, daß die Detektoreinheit nur einen relativ kleinen Flächenbereich der Leuchteinheit bedeckt.To continue most of the display surface for light emission To be able to use is advantageously provided that the detector unit only one relatively small area of the lighting unit covered.
Um eine Erfassung des aktuellen Leuchtzustandes des Displays zu ermöglichen, die möglichst repräsentativ für die gesamte Fläche der Leuchteinheit ist, ist es vorteilhaft, daß die Detektoreinheit einen Flächenbereich der Leuchteinheit in Form eines umlaufenden Rahmens abdeckt.To record the current lighting status of the display enable the most representative of the entire area of the Is lighting unit, it is advantageous that the detector unit one Area of the light unit in the form of a surrounding frame covers.
Eine weitere vorteilhafte Weiterbildung sieht vor, daß die Detektoreinheit in einem durch eine die Displayoberfläche teilweise abdeckende Maske für den Betrachter ohnehin unsichtbaren Flächenbereich der Leuchteinheit angeordnet ist.Another advantageous development provides that the detector unit in a mask for the user who partially covers the display surface Viewer arranged invisible surface area of the lighting unit anyway is.
Weitere Vorteile der Erfindung ergeben sich aus den übrigen Unteransprüchen sowie aus der nachfolgenden Beschreibung des in der Zeichnung dargestellten Ausführungsbeispiels hervor. Further advantages of the invention emerge from the remaining subclaims and from the following description of the shown in the drawing Embodiment emerges.
Dabei zeigtIt shows
Fig. 1: Eine schematische Schnittdarstellung einer Ausführungsform eines erfindungsgemäßen Elektrolumineszenz-Displays Fig. 1: A schematic sectional view of an embodiment of an electroluminescent display according to the invention
Fig. 2: Eine schematische Schnittdarstellung einer alternativen Anordnung der Leucht- und Detektoreinheiten Fig. 2: A schematic sectional view of an alternative arrangement of the lighting and detector units
Fig. 3: Eine Elektrolumineszenz-Flächenlampe mit einer rahmenförmigen Detektoreinheit Fig. 3: A surface electroluminescent lamp with a frame-shaped detector unit
Wie aus Fig. 1 hervorgeht, umfaßt das erfindungsgemäße Elektrolumineszenz- Display eine Leuchteinheit 1, die im wesentlichen aus einer zwischen zwei Elektroden 2 und 3 angeordneten elektrolumineszierenden Schicht 4 gebildet ist, wobei die eine Elektrode 2 durch eine dielektrische Zwischenschicht 2' von der elektrolumineszierenden Schicht 4 getrennt ist, und die andere Elektrode 3 transparent ausgeführt und von einer ebenfalls transparenten Trägerfolie 5 abgedeckt ist. Die beiden Elektroden 2 und 3 sind über Leitungen 12' und 12' mit einer Wechselspannungsquelle 11 verbunden, von der sie mit einer Wechselspannung mit einstellbarer Amplitude und Frequenz beaufschlagt und dadurch zum Leuchten angeregt wird. Der Leuchteinheit 1 ist auf ihrer Leuchtseite, d. h. der Seite der Trägerfolie 5 gegenüberliegend in gleicher Aufbauweise eine Detektoreinheit 6 zugeordnet. Auch die Detektoreinheit 6 besteht aus einer zwischen zwei Elektroden 7 und 8 angeordneten elektrolumineszierenden Schicht 9, wobei die eine Elektrode 7 durch eine dielektrische Zwischenschicht 7' von der elektrolumineszierenden Schicht 9 getrennt ist, und die der Trägerfolie 5 gegenüberliegende Elektrode 8 transparent ausgeführt ist. Die beiden Elektroden 7 und 8 der Detektoreinheit 6 sind über Leitungen 13 und 13' mit einem kapazitätsgesteuerten Oszillator 10 verbunden. Im Betrieb des Elektrolumineszenz-Displays macht man sich den Effekt zunutzte, daß der durch die beiden Elektroden 7 und 8 gebildete Plattenkondensator seine Kapazität in Abhängigkeit des auf die elektrolumineszierende Schicht 9 einfallenden Lichts ändert. Der jeweils vorliegende Kapazitätswert des Kondensators wird durch den kapazitätsgesteuerten Oszillator 10 in eine Frequenz umgesetzt, die wiederum zur Ansteuerung der regelbaren Spannungsquelle 11 verwendet wird. Mit dieser Anordnung ist eine Regelung der von der Leuchteinheit abgestrahlten Helligkeit über den durch die Detektoreinheit 6 sowie den kapazitätsgesteuerten Oszillator 10 gebildeten Rückkopplungszweig möglich.As is apparent from Fig. 1, the electroluminescent display according to the invention comprises a lighting unit 1 , which is essentially formed from an electroluminescent layer 4 arranged between two electrodes 2 and 3 , the one electrode 2 through a dielectric intermediate layer 2 'of the electroluminescent layer 4 is separated, and the other electrode 3 is made transparent and is covered by a likewise transparent carrier film 5 . The two electrodes 2 and 3 are connected via lines 12 'and 12 ' to an AC voltage source 11 , from which they are supplied with an AC voltage with adjustable amplitude and frequency and are thereby excited to light up. The lighting unit 1 is assigned a detector unit 6 on its lighting side, ie opposite the side of the carrier film 5 in the same construction. The detector unit 6 also consists of an electroluminescent layer 9 arranged between two electrodes 7 and 8 , the one electrode 7 being separated from the electroluminescent layer 9 by a dielectric intermediate layer 7 ', and the electrode 8 opposite the carrier film 5 being transparent. The two electrodes 7 and 8 of the detector unit 6 are connected to a capacitance-controlled oscillator 10 via lines 13 and 13 '. In the operation of the electroluminescent display, the effect is exploited that the plate capacitor formed by the two electrodes 7 and 8 changes its capacitance as a function of the light incident on the electroluminescent layer 9 . The capacitance value of the capacitor in each case is converted by the capacitance-controlled oscillator 10 into a frequency, which in turn is used to control the controllable voltage source 11 . With this arrangement, it is possible to regulate the brightness emitted by the lighting unit via the feedback branch formed by the detector unit 6 and the capacitance-controlled oscillator 10 .
Im Unterschied zu der in Fig. 1 dargestellten Aufbautechnik, bei der die Leuchteinheit 1 und die Detektoreinheit 6 direkt auf einander gegenüberliegenden Seiten der Trägerfolie 5 aufgebracht sind, so daß eine Bedruckung der Trägerfolie 5 mit den entsprechenden Schichtabfolgen von beiden Seiten erforderlich ist, zeigt Fig. 2 ein alternatives Aufbaukonzept, bei dem lediglich eine einseitige Bedruckung der Trägerfolie 5 erforderlich ist, was prozeßtechnisch von Vorteil ist. Die in Fig. 2 dargestellte Anordnung ist eine Zwischenstufe im Herstellprozeß, bei der die großflächige Leuchteinheit 1 und die verglichen mit dieser relativ kleinflächige Detektoreinheit 6 auf der gleichen Seite der Trägerfolie 5 nebeneinander angeordnet sind. Die erfindungsgemäße Gesamtkonfiguration des Elektrolumineszenz-Displays entsteht hieraus durch Umklappen der Trägerfolie 5 in der in der Zeichnung dargestellten Pfeilrichtung, bis sich die Leuchteinheit 1 und die Detektoreinheit 6 in der erforderlichen gegenüberliegenden Position befinden. Der weitere Aufbau gleicht dann dem anhand Fig. 1 bereits beschriebenen.In contrast to the construction technique shown in FIG. 1, in which the lighting unit 1 and the detector unit 6 are applied directly to opposite sides of the carrier film 5 , so that printing of the carrier film 5 with the corresponding layer sequences from both sides is necessary, FIG . 2, which is process-technically advantageous structure of an alternative approach is required in which only a single-sided printing of the carrier foil 5. The arrangement shown in FIG. 2 is an intermediate stage in the manufacturing process, in which the large-area lighting unit 1 and the detector unit 6, which is relatively small in comparison with this, are arranged next to one another on the same side of the carrier film 5 . The overall configuration of the electroluminescent display according to the invention results from folding the carrier film 5 in the direction of the arrow shown in the drawing until the lighting unit 1 and the detector unit 6 are in the required opposite position. The further structure is then the same as that already described with reference to FIG. 1.
Fig. 3 zeigt eine Ausführung des erfindungsgemäßen Elektrolumineszenz- Displays, wobei die Leuchteinheit 1 als eine eine gleichmäßig leuchtende Fläche aufweisende Lampe ausgeführt ist. Die Detektoreinheit 6 ist dabei als ein die Leuchtfläche in Form eines umlaufenden Rahmens abdeckender Flächenbereich ausgeführt. Dadurch ergibt sich eine Erfassung des aktuellen Leuchtzustandes des Displays, die weitgehend repräsentativ für die gesamte Fläche der Leuchteinheit ist. Fig. 3 shows an embodiment of the electroluminescent display according to the invention, the lighting unit 1 being designed as a lamp having a uniformly illuminating surface. The detector unit 6 is designed as a surface area covering the luminous area in the form of a peripheral frame. This results in a detection of the current lighting status of the display, which is largely representative of the entire area of the lighting unit.
Claims (10)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10042500A DE10042500A1 (en) | 2000-08-30 | 2000-08-30 | Electroluminescent display |
| PCT/EP2001/009546 WO2002019775A2 (en) | 2000-08-30 | 2001-08-18 | Electroluminescent display |
| AU2001295485A AU2001295485A1 (en) | 2000-08-30 | 2001-08-18 | Electroluminescent display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10042500A DE10042500A1 (en) | 2000-08-30 | 2000-08-30 | Electroluminescent display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE10042500A1 true DE10042500A1 (en) | 2002-03-14 |
Family
ID=7654247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE10042500A Withdrawn DE10042500A1 (en) | 2000-08-30 | 2000-08-30 | Electroluminescent display |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU2001295485A1 (en) |
| DE (1) | DE10042500A1 (en) |
| WO (1) | WO2002019775A2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070029939A1 (en) * | 2005-08-05 | 2007-02-08 | Philip Burkum | Electroluminescent sign having a coded information region |
| EP3076756B1 (en) * | 2015-03-30 | 2021-07-21 | OLEDWorks GmbH | Oled device and driving method |
| EP3076757B1 (en) * | 2015-03-30 | 2023-01-04 | OLEDWorks GmbH | Oled device and driving method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3105981C2 (en) * | 1980-02-18 | 1984-03-29 | Sharp K.K., Osaka | Liquid crystal display device |
| JPH11307245A (en) * | 1998-04-24 | 1999-11-05 | Citizen Electronics Co Ltd | El drive circuit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58205823A (en) * | 1982-05-25 | 1983-11-30 | Seiko Instr & Electronics Ltd | Optical sensor |
| US5093654A (en) * | 1989-05-17 | 1992-03-03 | Eldec Corporation | Thin-film electroluminescent display power supply system for providing regulated write voltages |
-
2000
- 2000-08-30 DE DE10042500A patent/DE10042500A1/en not_active Withdrawn
-
2001
- 2001-08-18 WO PCT/EP2001/009546 patent/WO2002019775A2/en not_active Ceased
- 2001-08-18 AU AU2001295485A patent/AU2001295485A1/en not_active Abandoned
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3105981C2 (en) * | 1980-02-18 | 1984-03-29 | Sharp K.K., Osaka | Liquid crystal display device |
| JPH11307245A (en) * | 1998-04-24 | 1999-11-05 | Citizen Electronics Co Ltd | El drive circuit |
Non-Patent Citations (1)
| Title |
|---|
| JP-Abstr. 11307245 A * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2002019775A2 (en) | 2002-03-07 |
| AU2001295485A1 (en) | 2002-03-13 |
| WO2002019775A3 (en) | 2002-05-23 |
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