DE102007005692A1 - Electro optical illuminant for use as organic light emitting diode, has organic light emitting material between two electrodes, where two electrodes are transparent anode and geometric structure cathode - Google Patents
Electro optical illuminant for use as organic light emitting diode, has organic light emitting material between two electrodes, where two electrodes are transparent anode and geometric structure cathode Download PDFInfo
- Publication number
- DE102007005692A1 DE102007005692A1 DE102007005692A DE102007005692A DE102007005692A1 DE 102007005692 A1 DE102007005692 A1 DE 102007005692A1 DE 102007005692 A DE102007005692 A DE 102007005692A DE 102007005692 A DE102007005692 A DE 102007005692A DE 102007005692 A1 DE102007005692 A1 DE 102007005692A1
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- Germany
- Prior art keywords
- electrodes
- organic light
- light emitting
- temperature sensor
- polymer
- Prior art date
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- Granted
Links
- 239000000463 material Substances 0.000 title claims abstract description 9
- 230000003287 optical effect Effects 0.000 title abstract 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 8
- 230000001419 dependent effect Effects 0.000 claims abstract description 6
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 4
- 229920000642 polymer Polymers 0.000 claims description 22
- 230000005855 radiation Effects 0.000 claims description 8
- 239000010410 layer Substances 0.000 description 9
- 239000000758 substrate Substances 0.000 description 4
- 238000009529 body temperature measurement Methods 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 239000002800 charge carrier Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- BUHVIAUBTBOHAG-FOYDDCNASA-N (2r,3r,4s,5r)-2-[6-[[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)ethyl]amino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound COC1=CC(OC)=CC(C(CNC=2C=3N=CN(C=3N=CN=2)[C@H]2[C@@H]([C@H](O)[C@@H](CO)O2)O)C=2C(=CC=CC=2)C)=C1 BUHVIAUBTBOHAG-FOYDDCNASA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000006059 cover glass Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 229920002457 flexible plastic Polymers 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
Classifications
-
- 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
- H10K50/87—Arrangements for heating or cooling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
Abstract
Description
Die Erfindung betrifft ein elektrooptisches Leuchtmittel gemäß dem Oberbegriff des Hauptanspruches, wie es häufig auch vereinfacht als OLED bezeichnet wird.The The invention relates to an electro-optical lamp according to General term of the main claim, as often simplified is called OLED.
Der
Aufbau eines derartigen OLEDs ist etwa aus den Zeitschriften
Es hat sich gezeigt, dass die für den praktischen Einsatz in erster Linie interessierenden Charakteristika solcher OLEDs, wie die Lebensdauer, die Hell-Dunkel-Umschaltdynamik und vor allem der Farbort (Frequenzspektrum der Lichtabstrahlung) sehr abhängig von der Betriebstemperatur des emittierenden Polymers sind. Deshalb wird bei funktionskritischen Einsatzfällen unter stark schwankenden Umgebungsbedingungen wie insbesondere in Armaturen von Land- oder Luftfahrzeugen die Momentantemperatur vor oder hinter dem OLED gemessen und über ein thermisches Modell des OLED-Aufbaus auf die tatsächliche Temperatur in der hermetisch gekapselten lichtaktiven Schicht rückgeschlossen. Solche Berechnungsmodelle erbringen aber systembedingt nur unzureichende da kaum reproduzierbare Abschätzungen.It has been shown that for practical use primarily interesting characteristics of such OLEDs, such as the lifetime, the light-dark switching dynamics and, above all the color locus (frequency spectrum of the light emission) very dependent from the operating temperature of the emitting polymer. Therefore becomes strong in function critical applications fluctuating environmental conditions, especially in valves of land or air vehicles the instantaneous temperature before or behind measured by the OLED and a thermal model of the OLED structure to the actual temperature in the hermetically sealed inferred light-active layer. Such calculation models but due to the system only provide insufficient and hardly reproducible ones Estimates.
In Erkenntnis dieser Gegebenheiten liegt vorliegender Erfindung die technische Problemstellung zugrunde, ein Leuchtmittel gattungsgemäßer Art dahingehend weiterzuentwickeln, dass die temperaturabhängigen Charakteristika im Betrieb besser beherrschbar werden.In Recognition of these facts is the present invention Technical problem underlying a light bulbs generic Art to further develop that the temperature-dependent Characteristics in the enterprise become better controllable.
Diese Aufgabe ist erfindungsgemäß durch die im Hauptanspruch angegebenen wesentlichen Merkmale gelöst. Danach wird mittels wenigstens einer ins Innere des OLEDs zusätzlich eingebrachten, temperaturabhängig elektrisch leitenden Struktur die tatsächliche momentane Temperatur auf wenigstens einer Seite der lichterzeugenden Polymerschicht indirekt oder direkt gemessen. Dadurch können für eine thermische Optimierung im laufenden OLED-Betrieb, ohne den aufwändigen und doch unzuverlässigen Umweg über eine mathematische Modellberechnung aufgrund externer Temperaturmessungen, gültige Temperaturwerte vom Polymer selbst direkt gewonnen werden.These Task is according to the invention by the main claim specified essential characteristics solved. After that is by means of at least one additionally introduced into the interior of the OLED, temperature-dependent electrically conductive structure the actual momentary Temperature on at least one side of the light-generating polymer layer measured indirectly or directly. This allows for a Thermal optimization in the current OLED operation, without the costly and yet unreliable detour via a mathematical Model calculation based on external temperature measurements, valid Temperature values are obtained directly from the polymer itself.
Für solche OLED-interne Temperaturmessung können die metallische Anode und/oder Kathode als Wärmemittler und Sensorträger dienen, auf den ein etwa mäandrischer Verlauf eines stark temperaturabhängigen elektrischen Leiters, etwa auf Platinbasis, unter Zwischenlage einer dünnen elektrisch isolierenden Schicht aufgedruckt oder über eine Maskierung aufgedampft wird. Dieser lineare oder vorzugsweise mäandrierend verlaufende Leitungszug führt mit seinem Anfang und seinem Ende an je einen von außerhalb des OLEDs für konstante Strom- oder Spannungsspeisung zur Temperaturmessung zugängliche Anschlusskontakte.For such OLED internal temperature measurement can be the metallic Anode and / or cathode as Wärmemittler and sensor carrier serve on which an approximately meandering course of a strong temperature-dependent electrical conductor, such as platinum-based, with the interposition of a thin electrically insulating Printed layer or evaporated on a mask becomes. This linear or preferably meandering running Cable train leads with its beginning and its end one each from outside the OLED for constant current or voltage supply for temperature measurement accessible Terminals.
Stattdessen oder zusätzlich kann aber auch vorgesehen sein, wenigstens einen solchen Temperatursensor, vorzugsweise lediglich unter Zwischenlage einer elektrisch isolierenden Ausgleichsschicht, also ohne einen metallischen Wärmeleiter in Form der Anode bzw. Kathode, unmittelbar auf das lichterzeugende Polymer aufzubringen.Instead or in addition, but can also be provided, at least Such a temperature sensor, preferably only with an intermediate layer an electrically insulating leveling layer, ie without one metallic heat conductor in the form of the anode or cathode, apply directly to the photogenerating polymer.
Der Temperaturabhängigkeit der wichtigsten Charakteristika von OLEDs kann also erfindungsgemäß über deren Stromversorgung wirksam entgegengesteuert werden, wenn die tatsächliche momentane Betriebstemperatur mittels wenigstens eines in das hermetisch gekapselte OLED eingebauten Temperatursensors messtechnisch erfasst wird. Dafür wird ein Leitungszug aus einem Material mit starkem Temperaturkoeffizienten seines elektrischen Widerstandes elektrisch isoliert auf eine der Elektroden (auf die vollflächige transparente Anode oder vorzugsweise auf die geometrisch strukturierte Kathode), vom Polymer abgewandt oder auf dem Polymer, aufgebracht. Wenn der Temperatursensor abstrahlseitig vor der Kathode, also auch wenn er an der Anode angeordnet ist, verläuft sein mäandrierender oder oszillierender Leitungszug vorzugsweise außerhalb der Projektion derjenigen geometrisch strukturierten Bereiche der Kathode, welche die Querschnittsgeometrien der Polymeranregung und somit der Abstrahlungen bedingen.Of the Temperature dependence of the most important characteristics OLEDs can thus according to the invention whose power supply are effectively counteracted when the actual instantaneous operating temperature by means of at least a temperature sensor built into the hermetically sealed OLED metrologically recorded. This is a cable train made of a material with a strong temperature coefficient of its electrical Resistance electrically isolated on one of the electrodes (on the full-surface transparent anode or preferably on the geometrically structured cathode), facing away from the polymer or on the polymer applied. If the temperature sensor radiating side in front of the cathode, so even if it is located at the anode, runs its meandering or oscillating Wiring preferably outside the projection of those geometrically structured regions of the cathode, which are the cross-sectional geometries the polymer excitation and thus the radiation condition.
Zusätzliche Alternativen und Weiterbildungen zur erfindungsgemäßen Lösung ergeben sich aus den weiteren Ansprüchen und, auch hinsichtlich ihrer Vorteile, aus nachstehender Beschreibung bevorzugter Ausbildungen solcher Lösungen. Die einzige Figur der Zeichnung zeigt, zum Stufenrand abstrahiert und nicht maßstabsgerecht stark vergrößert, im abgebrochenen Schnitt durch ein OLED eines Displays vorteilhafte Anordnungen von Temperatursensoren im OLED gemäß vorliegender Erfindung.Additional alternatives and developments for the solution according to the invention will become apparent from the other claims and, also with regard to their advantages, from the following description of preferred embodiments of such solutions. The sole figure of the drawing shows, abstracted to the edge of the step and not greatly enlarged to scale, in the broken section through an OLED of a Dis Plays advantageous arrangements of temperature sensors in the OLED according to the present invention.
Das
skizzierte OLED
Zum
Betrieb des OLED
Um
solchen Erscheinungen aus der Versorgung
Eine
dünne Isolierschicht
Bei
zwischen dem Polymer
- 1111
- OLEDOLED
- 1212
- Substratsubstratum
- 1313
- Anodeanode
- 1414
- Polymerpolymer
- 1515
- Abstrahlungradiation
- 1616
- Kathodecathode
- 1717
- Schutzschichtprotective layer
- 1818
- Versorgungcare
- 1919
- Temperatursensortemperature sensor
- 2020
- Leitungszugcable run
- 2121
- Isolierschichtinsulating
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte Nicht-PatentliteraturCited non-patent literature
- - FUNKSCHAU Heft 19/1995 (Seite 66 rechts) [0002] - FUNKSCHAU Issue 19/1995 (page 66 right) [0002]
- - ELEKTRONIK Heft 17/1999 (Seite 76 rechts) [0002] - ELEKTRONIK issue 17/1999 (page 76 right) [0002]
Claims (6)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007005692A DE102007005692B4 (en) | 2007-02-06 | 2007-02-06 | Electro-optical illuminant with organic light-emitting material |
DE202007004137U DE202007004137U1 (en) | 2007-02-06 | 2007-03-21 | Electro-optical illuminant with organic light-emitting material |
US12/026,739 US20080238304A1 (en) | 2007-02-06 | 2008-02-06 | Electro-optical luminous means comprising organic light-emitting material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007005692A DE102007005692B4 (en) | 2007-02-06 | 2007-02-06 | Electro-optical illuminant with organic light-emitting material |
Publications (2)
Publication Number | Publication Date |
---|---|
DE102007005692A1 true DE102007005692A1 (en) | 2008-08-07 |
DE102007005692B4 DE102007005692B4 (en) | 2009-06-04 |
Family
ID=39587300
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102007005692A Expired - Fee Related DE102007005692B4 (en) | 2007-02-06 | 2007-02-06 | Electro-optical illuminant with organic light-emitting material |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102007005692B4 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030048243A1 (en) * | 2001-09-11 | 2003-03-13 | Kwasnick Robert F. | Compensating organic light emitting device displays for temperature effects |
-
2007
- 2007-02-06 DE DE102007005692A patent/DE102007005692B4/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030048243A1 (en) * | 2001-09-11 | 2003-03-13 | Kwasnick Robert F. | Compensating organic light emitting device displays for temperature effects |
Non-Patent Citations (2)
Title |
---|
ELEKTRONIK Heft 17/1999 (Seite 76 rechts) |
FUNKSCHAU Heft 19/1995 (Seite 66 rechts) |
Also Published As
Publication number | Publication date |
---|---|
DE102007005692B4 (en) | 2009-06-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8364 | No opposition during term of opposition | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |