ORGANIC LIGHT EMITTING DISPLAY DEVICE

• US 20110169720A1
• Filed: 12/29/2010
• Published: 07/14/2011
• Est. Priority Date: 01/08/2010
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Mobile Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: YOON, Seok-Gyu, HA, Jae-Heung, LEE, Jong-Hyuk, SONG, Young-Woo, HWANG, Kyu-Hwan
• Granted Patent: US 8,659,218 B2
• Time in Patent Office: Days
• US Class Current: 345/76
• CPC Class Codes: H10K 2102/3026 Top emission
• CPC Class Codes: H10K 59/121 characterised by the geometry or disposition of pixel elements
• CPC Class Codes: H10K 59/124 Insulating layers formed between TFT elements and OLED elements
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals

Abstract

An organic light emitting display device that can prevent distortion of an image transmitted therethrough by preventing light scattering. The organic light emitting display device includes a substrate in which a plurality of transmitting regions and a plurality of pixel regions are defined. The plurality of pixel regions are spaced apart from each other by the transmitting regions. A passivation layer is formed in all the plurality of transmitting regions and the plurality of pixel regions. A first aperture is formed in a location on the passivation layer, which corresponds to an at least part of the plurality of transmitting regions; a plurality of pixel electrodes that are formed on the passivation layer and are disposed to overlap and cover the thin film transistors. An opposite electrode formed to face the plurality of pixel electrodes and to allow light to pass therethrough. An organic emission layer is interposed between the plurality of pixel electrodes and the opposite electrode to emit light.

Claims

1. An organic light emitting display device comprising:

a substrate in which a plurality of transmitting regions and a plurality of pixel regions are defined, where the plurality of pixel regions are spaced apart from each other by the transmitting regions interposed between the pixel regions;

a plurality of thin film transistors formed on a first surface of the substrate and disposed in the pixel regions of the substrate;

a passivation layer formed in all the plurality of transmitting regions and the plurality of pixel regions to cover the plurality of thin film transistors, where a first aperture is formed in a location on the passivation layer, which corresponds to an at least part of the plurality of transmitting regions;

a plurality of pixel electrodes that are formed on the passivation layer to be electrically connected to the plurality of thin film transistors, respectively, that are located in the pixel regions, respectively, and that are disposed to overlap and cover the thin film transistors, respectively;

an opposite electrode formed to face the plurality of pixel electrodes and to allow light to pass through the opposite electrode, and located to cover the plurality of transmitting regions and the plurality of pixel regions; and

an organic emission layer that is interposed between the plurality of pixel electrodes and the opposite electrode to emit light.

2. The organic light emitting display device of claim 1, wherein each of the plurality of pixel electrodes has an area identical to that of one of the plurality of pixel regions.

3. The organic light emitting display device of claim 1, further comprising:

a plurality of conductive lines electrically connected to the plurality of thin film transistors, respectively, wherein all of the conductive lines are arranged to overlap the plurality of pixel electrodes, respectively.

4. The organic light emitting display device of claim 1, wherein a ratio of a total area of the plurality of transmitting regions to a total area of the plurality of pixel regions and the plurality of transmitting regions is within a range extending between approximately 20% and approximately 90%.

5. The organic light emitting display device of claim 1, wherein the passivation layer is formed of a transparent material.

6. The organic light emitting display device of claim 5, wherein the substrate has a transmittance equal to or greater than that of the passivation layer.

7. The organic light emitting display device of claim 1, wherein a plurality of insulating layers are formed on a location corresponding to each of the plurality of transmitting regions, where at least one of the insulating layers comprises a second aperture to correspond at least one part of the plurality of transmitting regions.

8. The organic light emitting display device of claim 7, wherein the second aperture is connected to the first aperture.

9. The organic light emitting display device of claim 1, wherein at least one of the pixel electrodes and the opposite electrode is a transparent electrode.

10. An organic light emitting display device comprising:

a substrate in which a plurality of transmitting regions and a plurality of pixel regions are defined, where the plurality of pixel regions are spaced apart from each other by the transmitting regions interposed between the pixel regions;

a plurality of pixel circuit units that are formed on a first surface of the substrate, and are positioned in the plurality of pixel regions, respectively, each of the plurality of pixel circuit units comprising at least one thin transistor;

a first insulating layer formed in all the plurality of transmitting regions and the plurality of pixel regions to cover the plurality of pixel circuit units, the first insulating layer comprising a third aperture on a location corresponding to at least parts of the plurality of transmitting regions;

a plurality of pixel electrodes that are formed on the first insulating layer to be electrically connected to the plurality of pixel circuit units, respectively, and that are disposed to overlap and cover the pixel circuit units, respectively;

an opposite electrode formed to face the plurality of pixel electrodes and to allow light to pass through the opposite electrode, and located to cover the plurality of transmitting regions and the plurality of pixel regions; and

an organic emission layer that is interposed between the plurality of pixel electrodes and the opposite electrode to emit light.

11. The organic light emitting display device of claim 10, wherein the plurality of pixel electrodes are formed on the same locations where the plurality of pixel regions are formed, respectively.

12. The organic light emitting display device of claim 10, further comprising a plurality of conductive lines electrically connected to the plurality of pixel circuit units, respectively, wherein all the conductive lines are arranged to cross the plurality of pixel regions, respectively.

13. The organic light emitting display device of claim 10, wherein a ratio of a total area of the plurality of transmitting regions to a total area of the plurality of pixel regions and the plurality of transmitting regions is within a range between approximately 20% and approximately 90%.

14. The organic light emitting display device of claim 10, wherein the first insulating layer is formed of a transparent material, and

a plurality of second insulating layers formed of a transparent material are further arranged in the plurality of transmitting regions and the plurality of pixel regions.

15. The organic light emitting display device of claim 14, wherein the substrate has a transmittance equal to or greater than a total transmittance of the first insulating layer and the plurality of second insulating layers.

16. The organic light emitting display device of claim 15, wherein at least one of the plurality of second insulating layers comprises a fourth aperture on a location corresponding to at least parts of the plurality of transmitting regions.

17. The organic light emitting display device of claim 16, wherein the fourth aperture is connected to the third aperture.

18. The organic light emitting display device of claim 10, wherein at least one of the pixel electrodes and the opposite electrode is a transparent electrode.

19. An organic light emitting display device comprising:

a substrate in which a plurality of transmitting regions and a plurality of pixel regions are defined, where the plurality of pixel regions are spaced apart from each other by the transmitting regions interposed between the pixel regions;

a plurality of thin film transistors formed on a first surface of the substrate and disposed in the pixel regions of the substrate;

a passivation layer formed in all the plurality of transmitting regions and the plurality of pixel regions to cover the plurality of thin film transistors, where a first aperture is formed in a location on the passivation layer, which corresponds to an at least part of the plurality of transmitting regions;

a plurality of pixel electrodes that are formed on the passivation layer to be electrically connected to the plurality of thin film transistors, respectively, are located in the pixel regions, respectively, and are disposed to overlap and cover the thin film transistors, respectively;

an opposite electrode formed to face the plurality of pixel electrodes and to allow light to pass the opposite electrode, and located covering the plurality of transmitting regions and the plurality of pixel regions; and

an organic emission layer that is interposed between the plurality of pixel electrodes and the opposite electrode to emit light,

wherein a ratio of a total area of the plurality of transmitting regions to a total area of the plurality of pixel regions and the plurality of transmitting regions is within a range between approximately 20% and approximately 90%.

20. The organic light emitting display device of claim 19, wherein the ratio of the total area of the plurality of transmitting regions to the total area of the plurality of pixel regions and the plurality of transmitting regions is within a range between approximately 40% and approximately 70%.