PIXEL STRUCTURE, DISPLAY PANEL, ELECTRO-OPTICAL APPARATUS AND MANUFACTURING METHOD OF THE SAME

• US 20090180066A1
• Filed: 04/29/2008
• Published: 07/16/2009
• Est. Priority Date: 01/15/2008
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Huang, Kuo-Yu, Tung, Chun-Hao
• Granted Patent: US 7,956,961 B2
• Time in Patent Office: Days
• US Class Current: 349/114
• CPC Class Codes: G02F 1/133553 Reflecting elements associated to illuminating devices G02F1/133605
• CPC Class Codes: G02F 1/133555 Transflectors

Abstract

A pixel structure disposed on a substrate having a plurality of protrudent patterns is provided. An area where the protrudent patterns are disposed defines a first display area. The arrangement of the protrudent patterns forms a plurality of arc loci. The arc loci have a same arc center disposed at a corner of the first display area. The abovementioned protrudent patterns avails improvement of a displaying effect of the pixel structure.

Claims

1. A pixel structure, disposed on a substrate, having a plurality of protrudent patterns, and an area where the protrudent patterns are located defines a first display area, and an arrangement of the protrudent patterns approximately forms a plurality of arc loci, wherein the arc loci have a same arc center, and the arc center is located at a corner of the first display area.

2. The pixel structure of claim 1, wherein a total area of the protrudent patterns substantially occupies 18%˜

25% of an area of the first display area.

3. The pixel structure of claim 1, wherein a curvature radius of each of the arc loci is n*d, where n is a natural number greater than zero, and d is a distance between the arc center and the adjacent arc lotus.

4. The pixel structure of claim 3, wherein at least one protrudent pattern is arranged in each of the arc loci, and a distance between the protrudent patterns respectively on each of arc loci is d.

5. The pixel structure of claim 1, further comprises:

a scan line;

a data line intersected with the scan line;

an active device electrically connected to the scan line and the data line;

a first pixel electrode electrically connected to the active device; and

a first dielectric layer disposed on the substrate, wherein the first pixel electrode is conformally disposed on the first dielectric layer, the first dielectric layer has the protrudent patterns, and the first dielectric layer has a first film thickness and a second film thickness substantially less than the first film thickness, such that a difference between the first film thickness and the second film thickness substantially equals to a height of the protrudent patterns.

6. The pixel structure of claim 5, wherein the first pixel electrode is a reflective pixel electrode or a transmissive pixel electrode.

7. The pixel structure of claim 5, further comprises a second pixel electrode electrically connected to the active device, and the second pixel electrode defines a second display area.

8. The pixel structure of claim 7, wherein the first dielectric layer is further disposed between the second pixel electrode and the substrate, and a part of the first dielectric layer covered by the second pixel electrode has approximately the same first film thickness or the second film thickness.

9. The pixel structure of claim 5, further comprises a second dielectric layer disposed between the first dielectric layer and the first pixel electrode, and the second dielectric layer and the first dielectric layer are conformal.

10. The pixel structure of claim 1, further comprises:

a scan line;

a data line intersected with the scan line;

an active device electrically connected to the scan line and the data line; and

a first pixel electrode, electrically connected to the active device, and a part of the first pixel electrode forms the protrudent patterns.

11. The pixel structure of claim 1, further comprises:

a scan line;

a data line intersected with the scan line;

an active device electrically connected to the scan line and the data line;

a first pixel electrode electrically connected to the active device; and

a capacitor electrode, disposed between the substrate and the first pixel electrode, and a part of the capacitor electrode forms the protrudent patterns.

12. A display panel, comprising:

a first substrate;

a second substrate disposed in parallel to the first substrate;

a display media layer disposed between the first substrate and the second substrate; and

a plurality of pixel structures disposed on the first substrate, each of the pixel structures has a plurality of protrudent patterns, and an area where the protrudent patterns are located defines a first display area, and an arrangement of the protrudent patterns approximately forms a plurality of arc loci, wherein the arc loci have a same arc center, and the arc center is located at a corner of the first display area.

13. The display panel of claim 12, wherein the arc center of each of the pixel structures and the arc center of one of an adjacent pixel structures are located at different corners of the corresponding first display area.

14. The display panel of claim 12, wherein a total area of the protrudent patterns of each of the pixel structures substantially occupies 18%˜

25% of an area of the first display area.

15. The display panel of claim 12, wherein each of the first display areas is substantially a rectangular and has a first corner, a second corner, a third corner, and a fourth corner, wherein the first corner is located opposite to the third corner, and the second corner is located opposite to the fourth corner.

16. The display panel of claim 15, wherein in two adjacent pixel structures, positions of the arc centers are located at the opposite corners.

17. The display panel of claim 15, wherein in four pixel structures, positions of the arc centers are respectively located at the first corner, the second corner, the third corner, and the fourth corner of the corresponding first display area.

18. The display panel of claim 12, wherein a curvature radius of each of the arc loci is n*d, where n is a natural number greater than zero, and d is a distance between the arc center and the adjacent arc lotus.

19. The display panel of claim 18, wherein at least one protrudent pattern is arranged in each of the arc loci, and a distance between the protrudent patterns respectively on each of the arc loci is d.

20. The display panel of claim 12, wherein each of the pixel structures comprises:

a scan line;

a data line intersected with the scan line;

an active device electrically connected to the scan line and the data line;

a first pixel electrode electrically connected to the active device; and

a first dielectric layer disposed on the substrate, the first pixel electrode is conformally disposed on the first dielectric layer, the first dielectric layer has the protrudent patterns, and has a first film thickness and a second film thickness substantially less than the first film thickness, such that a difference between the first film thickness and the second film thickness substantially equals to a height of the protrudent patterns.

21. The display panel of claim 20, wherein the first pixel electrode is a reflective pixel electrode or a transmissive pixel electrode.

22. The display panel of claim 20, wherein each of the pixel structures further comprises a second pixel electrode electrically connected to the active device, and the second pixel electrode defines a second display area.

23. The display panel of claim 22, wherein the first dielectric layer is further disposed between the second pixel electrode and the first substrate, and a part of the first dielectric layer covered by the second pixel electrode has approximately the same first film thickness or the second film thickness.

24. The display panel of claim 22, further comprising an additional layer disposed between the second substrate and the display media layer, and the additional dielectric layer is located at the first display area is adapted to adjust a thickness of the display media layer located above the first pixel electrodes.

25. The display panel of claim 20, wherein each of the pixel structures further comprises a second dielectric layer disposed between the first dielectric layer and the first pixel electrode, and the second dielectric layer and the first dielectric layer are conformal.

26. The display panel of claim 12, wherein each of the pixel structures comprises:

a scan line;

a data line intersected with the scan line;

an active device electrically connected to the scan line and the data line; and

a first pixel electrode electrically connected to the active device, and a part of the first pixel electrode forms the protrudent patterns.

27. The display panel of claim 12, wherein each of the pixel structures comprises:

a scan line;

a data line intersected with the scan line;

an active device electrically connected to the scan line and the data line;

a first pixel electrode electrically connected to the active device; and

a capacitor electrode disposed between the first substrate and the first pixel electrode, and a part of the capacitor electrode forms the protrudent patterns.

28. The display panel of claim 12, further comprising at least a spacer disposed between the first substrate and the second substrate.

42. An electro-optical apparatus incorporating the display panel of claim 12.

29. A method for fabricating a display panel, comprising:

providing a first substrate;

forming a plurality of pixel structures on the first substrate, each of the pixel structures having a plurality of protrudent patterns, an area where the protrudent patterns are located defines a first display area, and an arrangement of the protrudent patterns approximately forms a plurality of arc loci, wherein the arc loci have a same arc center, and the arc center is located at a corner of the first display area;

providing a second substrate; and

forming a display media layer between the first substrate and the second substrate.

30. The method of claim 29, wherein the formation of the plurality of protrudent patterns comprises allocating the arc center of each of the pixel structures and the arc center of one of the adjacent pixel structure located at different corners of the corresponding first display areas.

31. The method of claim 29, wherein the formation of each of the pixel structures comprises:

forming a scan line and data line on the first substrate, and the scan line and the data line are intersected;

forming an active device on the first substrate, and the active device is electrically connected to the scan line and the data line;

forming a first dielectric layer on the first substrate, the first dielectric layer has the plurality of protrudent patterns, and the first dielectric layer has a first film thickness and a second film thickness substantially less than the first film thickness, such that a difference between the first film thickness and the second film thickness substantially equals to a height of the protrudent patterns; and

forming a first pixel electrode on the first substrate, the first pixel electrode is electrically connected to the active device, and the first pixel electrode is conformally disposed on the first dielectric layer.

32. The method of claim 31, wherein the formation of the first dielectric layer comprising:

forming a dielectric material layer on the first substrate; and

performing a patterning process by utilizing a half-tone mask adapted patterning the dielectric material layer, wherein the half-tone mask has an opaque area, a transparent area, and a partially transparent area, the transparent area is located above a part of the active device, the opaque area and the partially transparent area are located within the first display area, and the dielectric material layer located below the opaque area is patterned to form the protrudent patterns.

33. The method of claim 32, further comprises forming a simulation test pattern on the first substrate as performing the patterning process.

34. The method of claim 32, wherein a transmissivity of the partially transparent area is substantially between 10%˜

30%.

35. The method of claim 32, wherein the formation of each of the pixel structures further comprises forming a second dielectric layer between the first dielectric layer and the first pixel electrode, and the second dielectric layer and the first dielectric layer are conformal.

36. The method of claim 32, wherein the formation of each of the pixel structures further comprises forming a second pixel electrode on the first substrate, the second pixel electrode is electrically connected to the active device, and the second pixel electrode defines a second display area.

37. The method of claim 36, wherein the partially transparent area of the half-tone mask is further located above the second display area.

38. The method of claim 36, wherein one of the opaque area and the transparent area of the half-tone mask is further located above the second display area.

39. The method of claim 36, further comprising forming an additional dielectric layer on the second substrate, and the additional layer is located within the first display area.

40. The method of claim 29, wherein the formation of each of the pixel structures comprises:

forming a scan line and a data line on the first substrate, and the scan line and the data line are intersected;

forming an active device on the first substrate, and the active device is electrically connected to the scan line and the data line;

forming a first pixel electrode on the first substrate, and the first pixel electrode is electrically connected to the active device; and

forming a capacitor electrode on the first substrate, and the capacitor electrode is located between the first pixel electrode and the first substrate, and a part of the capacitor electrode forms the protrudent patterns.

41. The method of claim 29, further comprising forming at least a spacer between the first substrate and the second substrate.

43. A method for fabricating an electro-optical apparatus incorporating the method of claim 29.