Organic electroluminescent display device

• US 20050035709A1
• Filed: 07/23/2004
• Published: 02/17/2005
• Est. Priority Date: 08/11/2003
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Hitachi Displays Limited (Japan Display Incorporated)
• Inventors: Kato, Shinichi, Furuie, Masamitsu, Ito, Masato, Sakamoto, Hirotsugu, Okunaka, Masaaki
• Granted Patent: US 7,705,531 B2
• Time in Patent Office: Days
• US Class Current: 313/506
• CPC Class Codes: H01L 27/14623 Optical shielding
• CPC Class Codes: H01L 31/02164 for shielding light, e.g. light blocking layers, cold shields for infrared detectors
• CPC Class Codes: H10K 2102/3026 Top emission
• CPC Class Codes: H10K 50/841 Self-supporting sealing arrangements
• CPC Class Codes: H10K 50/85 Arrangements for extracting light from the devices
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/13 comprising photosensors that control luminance
• CPC Class Codes: H10K 59/60 OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
• CPC Class Codes: H10K 59/871 Self-supporting sealing arrangements
• CPC Class Codes: H10K 59/875 Arrangements for extracting light from the devices

Abstract

In an organic electroluminescent display device having light emitting layers which are independently controlled and emit light formed in respective pixel regions on a principal surface of a substrate and emitting light from each of the light emitting layer through the substrate, the present invention arranges a light shielding member on an end wall face of the substrate and prevents the light from leaking from the end wall face thereof.

Claims

1. An organic electroluminescent display device being characterized in that a light emitting layer which is controlled independently and emits light is formed on each pixel region on one surface of a substrate, light from the light emitting layer is irradiated through the substrate, and a light shielding member is arranged on an end wall face of a periphery of the substrate.

3. An organic electroluminescent display device according to claim 1, wherein the light emitting layer is formed on a portion of each pixel region and a bank layer is formed between the light emitting layer and the light emitting layer of another pixel region arranged adjacent to the light emitting layer, and the bank layer is extended to an end wall face of the substrate and constitutes the light shielding member.

6. An organic electroluminescent display device according to claim 1, wherein the light shielding member is a resin member.

7. An organic electroluminescent display device according to claim 1, wherein the light shielding member is an adhesive tape.

8. An organic electroluminescent display device according to claim 1, wherein the light shielding member is formed by extending a material formed on the substrate to an end wall face of the substrate.

2. An organic electroluminescent display device comprising a first substrate and a second substrate which faces a display part of the first substrate on which light emitting layers are formed in an opposed manner and is fixed to the first substrate using a sealing material which surrounds the display part, and

a light shielding member is arranged on respective end wall faces of the first substrate and the second substrate.

9. An organic electroluminescent display device according to claim 2, wherein the light emitting layer is formed on a portion of each pixel region and a bank layer is formed between the light emitting layer and the light emitting layer of another pixel region arranged adjacent to the light emitting layer, and the bank layer is extended to an end wall face of the substrate and constitutes the light shielding member.

10. An organic electroluminescent display device according to claim 2, wherein the light shielding member is a resin member.

11. An organic electroluminescent display device according to claim 2, wherein the light shielding member is an adhesive tape.

12. An organic electroluminescent display device according to claim 2, wherein the light shielding member is formed by extending a material formed on the substrate to an end wall face of the substrate.

4. An organic electroluminescent display device being characterized in that a light emitting layer which is controlled independently and emits light is formed on each pixel region on one surface of a substrate, light from the light emitting layer is irradiated through the substrate, a light shielding member is arranged on an end wall face of a periphery of the substrate,

an optical sensor is arranged between a portion of the end wall face and the light shielding member, and an electric current which is made to flow into the light emitting layer is controlled in response to an output of the optical sensor.

5. An organic electroluminescent display device being characterized in that a light emitting layer which is controlled independently and emits light is formed on each pixel region on one surface of a substrate, light from the light emitting layer is irradiated through the substrate, a light shielding member is arranged on an end wall face of a periphery of the substrate,

a solar cell is arranged between a portion of the end wall face and the light shielding member, and an output of the solar cell is used for driving the light emitting layer.