ELECTRO-LUMINESCENCE DISPLAY

• US 20080231554A1
• Filed: 07/17/2007
• Published: 09/25/2008
• Est. Priority Date: 03/22/2007
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Lee, Chung-Chun
• Granted Patent: US 8,159,508 B2
• Time in Patent Office: Days
• US Class Current: 345/63
• CPC Class Codes: H10K 59/352 the areas of the RGB subpixels being different
• CPC Class Codes: H10K 59/353 characterised by the geometrical arrangement of the RGB subpixels

Abstract

An electroluminescent display comprises a substrate with a plurality of pixel regions, wherein each pixel region has a first sub-pixel region, a second sub-pixel region, and a third sub-pixel region. Pluralities of first color light-emitting layers, second color light-emitting layers, and third color light-emitting layers are formed on the substrate. Each first color light-emitting layer is disposed in one first sub-pixel region, and each second color light-emitting layer is disposed in two adjacent second sub-pixel regions. The area of the first sub-pixel region is larger than the area of the second sub-pixel region in a single pixel region.

Claims

1. An electroluminescent display comprising:

a substrate having a plurality of pixel regions, each of the pixel regions including a first sub-pixel region, a second sub-pixel region, and a third sub-pixel region; and

a plurality of first color light-emitting layers, a plurality of second color light-emitting layers, and a plurality of third color light-emitting layers disposed on the substrate, each of the first color light-emitting layers being positioned in one of the first sub-pixel regions, and each of the second color light-emitting layers being positioned in two adjacent second sub-pixel regions, wherein an area of the first sub-pixel region is larger than an area of the second sub-pixel region in the single pixel region.

2. The electroluminescent display of claim 1, wherein the third color light-emitting layer is positioned in two adjacent third sub-pixel regions, and the area of the first sub-pixel region is larger than an area of the third sub-pixel region in the single pixel region.

3. The electroluminescent display of claim 1, wherein the area of the first sub-pixel region is about twice as an area of the third sub-pixel region.

4. The electroluminescent display of claim 1, wherein each of the third color light-emitting layers is positioned in only one third sub-pixel region, and an area of the third sub-pixel region is larger than the area of the second sub-pixel region in a single pixel region.

5. The electroluminescent display of claim 1, wherein the first sub-pixel regions, the second sub-pixel regions, and the third sub-pixel regions are arranged as an array that comprises a plurality of rows, each of the odd rows of the array is an alternation of one first sub-pixel region and one second sub-pixel region, and each of the even rows of the array is an alternation of one third sub-pixel region and one first sub-pixel region.

6. The electroluminescent display of claim 5, wherein the first sub-pixel regions are not adjacent to each other.

7. The electroluminescent display of claim 5, wherein the first sub-pixel regions in the adjacent rows are adjacent to each other and arranged as a plurality of columns.

8. The electroluminescent display of claim 5, wherein the even rows are shifted from the odd rows along a horizontal direction by a distance of a half width of the first color light-emitting layers.

9. The electroluminescent display of claim 1, wherein the area of the first sub-pixel regions is about twice as the area of the second sub-pixel regions.

10. The electroluminescent display of claim 1, wherein the first sub-pixel regions, the second sub-pixel regions, and the third sub-pixel regions are arranged as an array that comprises a plurality of columns, each of the odd columns of the array is composed of the pluralities of the first sub-pixel regions, and each of the even columns of the array is an alternation of two second sub-pixel regions and two third sub-pixel regions.

11. The electroluminescent display of claim 10, wherein each of the even columns of the array is an alternation of one second color light-emitting layer and one third color light-emitting layer.

12. The electroluminescent in claim 10, wherein one of the first sub-pixel regions, one of the second sub-pixel regions, and one of the third sub-pixel regions are adjacent to each other, the array comprises a plurality of rows, and each of the rows is an alternation of a second and a third sub-pixel regions and a first sub-pixel region.

13. The electroluminescent display of claim 1, wherein the area of the first sub-pixel region is 1.3 to 6 times larger than the area of the second sub-pixel regions.

14. The electroluminescent display of claim 13, wherein the area of the first sub-pixel regions is 1.3 to 6 times larger than an area of the third sub-pixel regions.

15. The electroluminescent display of claim 1, wherein each of the first color light-emitting layers comprises a blue light-emitting layer.

16. The electroluminescent display of claim 1, wherein each of the second color light-emitting layers comprises a green light-emitting layer.

17. The electroluminescent display of claim 1, wherein each of the second color light-emitting layers comprises a green light-emitting layer and each of the third color light-emitting layers comprises a red light-emitting layer.

18. The electroluminescent display of claim 1, wherein each of the third color light-emitting layers comprises a red light-emitting layer.

19. The electroluminescent in claim 1, wherein each of the second color light-emitting layers comprises a cyan light-emitting layer, a magenta light-emitting layer, or a yellow light-emitting layer.

20. The electroluminescent display of claim 1, further comprising a plurality of thin-film transistors, each of which being positioned in one of the first sub-pixel regions, the second sub-pixel regions, and the third sub-pixel regions.

21. The electroluminescent display of claim 1, wherein the area of the first sub-pixel region is about 9×

10<sup>−

4</sup> square millimeters (mm²) to 2.25×

10−

2 mm².

22. The electroluminescent display of claim 1, wherein areas of the first color light-emitting layer, the second color light-emitting layer, and the third light-emitting layer are approximately the same.

23. The electroluminescent display of claim 1, wherein the first light-emitting layers, the second light-emitting layers, and the third light-emitting layers comprise organic light-emitting layers.

24. An electroluminescent display, comprising:

a substrate comprising a plurality of pixel regions, each of which comprises a first sub-pixel region, a second sub-pixel region, and a third sub-pixel region, wherein two of the second sub-pixel regions are disposed adjacent to each other;

at least one blue light-emitting layer formed in one of the first sub-pixel regions;

at least one green light-emitting layer formed in one of the second sub-pixel regions; and

at least one red light-emitting layer formed in one of the third sub-pixel regions;

wherein an area of the first sub-pixel region is larger than an area of the second sub-pixel region.

25. The electroluminescent display of claim 24, wherein the first sub-pixel regions and the second sub-pixel regions are alternately disposed.

26. The electroluminescent display of claim 24, wherein the blue light-emitting layer, the red light-emitting layer, and the green light-emitting layer comprise organic light-emitting layers.