ELECTRO-OPTICAL LUMINOUS MEANS COMPRISING ORGANIC LIGHT-EMITTING MATERIAL

• US 20080238304A1
• Filed: 02/06/2008
• Published: 10/02/2008
• Est. Priority Date: 02/06/2007
• Status: Abandoned Application

• Current Assignee: Diehl Aerospace GmbH (Diehl VA Systeme Stiftung & Company KG)
• Original Assignee: Diehl Aerospace GmbH (Diehl VA Systeme Stiftung & Company KG)
• Inventors: Schmid, Frank, Klettke, Oliver
• Application Number:
  US12/026,739
• Publication Number:
  US 20080238304A1
• Time in Patent Office: Days
• US Class Current: 313/504
• CPC Class Codes: H10K 50/80 Constructional details
• CPC Class Codes: H10K 50/87 Arrangements for heating or cooling

Abstract

The temperature dependence of the most important characteristics of OLEDs (11) can be effectively counteractively controlled by the power supply (18) thereof if the actual instantaneous operating temperature is detected metrologically by at least one temperature sensor (19) incorporated into the hermetically encapsulated OLED (11). For this purpose, a line section (20) composed of a material having a high temperature coefficient of its electrical resistance is applied in electrically insulated fashion to one of the electrodes (areal transparent anode 13 or geometrically structured cathode 16), in a manner facing or averted from the polymer (14). If the temperature sensor (19) is arranged before the cathode on the emission side, that is to say even if it is arranged at the anode (13), its line section (20) preferably runs outside the projection of those geometrically structured regions of the cathode (16) which govern the cross-sectional geometries of the polymer excitation and thus of the emissions (15).

Claims

1. An electro-optical luminous means (11) comprising an organic light-emitting material, which is arranged between two electrodes and wherein a temperature sensor (19) is arranged on one of the electrodes.

2. An electro-optical luminous means according to claim 1, wherein the temperature sensor (19) is a line section (20) composed of a material having a highly temperature-dependent electrical resistance.

3. An electro-optical luminous means according to claim 2, wherein said line section (20) extends in an oscillating or meandering manner with a platinum-containing material being applied by selectively printing or vapor deposition.

4. An electro-optical luminous means according to claim 1, wherein an electrical insulation layer (21) is formed between the temperature sensor (19) and said electrode.

5. An electro-optical luminous means according to claim 1, wherein the temperature sensor (19) is provided in regions whose projection does not coincide with regions of emissions (15).

6. An electro-optical luminous means according to claim 1, wherein the temperature sensor (19) is arranged on the organic light-emitting material.

7. An electro-optical luminous means according to claim 1, wherein said two electrodes comprise, respectively, a transparent anode (13) and a geometrically structured cathode (16).