Liquid crystal panel and equipment comprising said liquid crystal panel

• US 7,289,184 B2
• Filed: 05/25/2006
• Issued: 10/30/2007
• Est. Priority Date: 04/24/1997
• Status: Expired due to Fees

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Hirakata, Yoshiharu
• Primary Examiner(s): Dudek; James A.
• Application Number:
  US11/440,115
• Publication Number:
  US 20060221293A1
• Time in Patent Office: 523 Days
• Field of Search: 349/151, 349/153, 349189-190
• US Class Current: 349/153
• CPC Class Codes: G02F 1/133388 with constructional differences between the display region and the peripheral region
• CPC Class Codes: G02F 1/1339 Gaskets; Spacers; Sealing of cells
• CPC Class Codes: G02F 1/13454 Drivers integrated on the active matrix substrate G02F1/136277 takes precedence

Abstract

Non-uniformity of a cell gap of a liquid crystal panel is suppressed from affecting display adversely. Concentric interference fringes are unavoidably formed in a liquid crystal cell in which liquid crystal is sealed and the cell gap is maintained by a sealing member without using scattered spacers. Then, peripheral driving circuits are provided in regions where the interference fringes exist and a pixel matrix circuit is disposed in a region where no interference fringe exists. It is then possible to suppress the cell gap from affecting the display by determining the circuit configuration by parameterizing the interference fringes as described above.

Claims

1. A display device comprising:

a liquid crystal panel comprising;

a first substrate and a second substrate opposed to each other, and having a gap therebetween;

a pixel region and a driving circuit, each of the pixel region and the driving circuit comprising thin film transistors;

a liquid crystal material between the first and second substrates; and

a sealing member between the first and second substrates to maintain the liquid crystal material between the first and second substrates,

wherein interference fringes appear where the gap varies in an order of 0.25 μ

m or more,

wherein the driving circuit is provided in a region where the interference fringes appear, and

wherein the pixel region is provided outside the region.

2. A display device according to claim 1, wherein the liquid crystal panel is a transmission type liquid crystal panel.

3. A display device according to claim 1, wherein the liquid crystal panel is a reflection type liquid crystal panel.

4. A display device according to claim 1, wherein the gap is from 1 to 5 μ

m.

5. A display device according to claim 1, wherein the display device is incorporated in at least one selected from the group consisting of a mobile computer, a head-mount display, a video camera, a projector and a portable telephone.

6. A display device comprising:

a liquid crystal panel comprising;

a first substrate and a second substrate opposed to each other, and having a gap therebetween;

a pixel region and a driving circuit, each of the pixel region and the driving circuit comprising thin film transistors;

a liquid crystal material between the first and second substrates; and

a sealing member between the first and second substrates to maintain the liquid crystal material between the first and second substrates,

wherein interference fringes appear where the gap varies in an order of 0.25 μ

m or more,

wherein the driving circuit is provided in a region where the interference fringes appear,

wherein the pixel region is provided outside the region, and

wherein the liquid crystal panel has no spacer between the first and second substrates.

7. A display device according to claim 6, wherein the liquid crystal panel is a transmission type liquid crystal panel.

8. A display device according to claim 6, wherein the liquid crystal panel is a reflection type liquid crystal panel.

9. A display device according to claim 6, wherein the gap is from 1 to 5 μ

m.

10. A display device according to claim 6, wherein the display device is incorporated in at least one selected from the group consisting of a mobile computer, a head-mount display, a video camera, a projector and a portable telephone.

11. A display device comprising:

a liquid crystal panel comprising;

a first substrate and a second substrate opposed to each other, and having a gap therebetween;

a pixel region and a driving circuit, each of the pixel region and the driving circuit comprising thin film transistors;

a liquid crystal material between the first and second substrates; and

a sealing member between the first and second substrates to maintain the liquid crystal material between the first and second substrates,

wherein interference fringes appear where the gap varies in an order of 0.25 μ

m or more,

wherein the driving circuit is provided in a region where the interference fringes appear,

wherein the pixel region is provided outside the region, and

wherein the liquid crystal panel has an across corners size of less than 2 inches.

12. A display device according to claim 11, wherein the liquid crystal panel is a transmission type liquid crystal panel.

13. A display device according to claim 11, wherein the liquid crystal panel is a reflection type liquid crystal panel.

14. A display device according to claim 11, wherein the gap is from 1 to 5 μ

m.

15. A display device according to claim 11, wherein the display device is incorporated in at least one selected from the group consisting of a mobile computer, a head-mount display, a video camera, a projector and a portable telephone.

16. A display device comprising:

a liquid crystal panel comprising;

a first substrate and a second substrate opposed to each other, and having a gap therebetween;

a pixel region and a driving circuit, each of the pixel region and the driving circuit comprising thin film transistors;

a liquid crystal material between the first and second substrates; and

a sealing member between the first and second substrates to maintain the liquid crystal material between the first and second substrates,

wherein interference fringes appear where the gap varies in an order of 0.25 μ

m or more,

wherein the driving circuit is provided in a region where the interference fringes appear,

wherein the pixel region is provided outside the region, and

wherein the liquid crystal panel has no spacer between the first and second substrates, and has an across corners size of less than 2 inches.

17. A display device according to claim 16, wherein the liquid crystal panel is a transmission type liquid crystal panel.

18. A display device according to claim 16, wherein the liquid crystal panel is a reflection type liquid crystal panel.

19. A display device according to claim 16, wherein the gap is from 1 to 5 μ

m.

20. A display device according to claim 16, wherein the display device is incorporated in at least one selected from the group consisting of a mobile computer, a head-mount display, a video camera, a projector and a portable telephone.

21. A display device comprising:

a liquid crystal panel comprising;

a first substrate and a second substrate opposed to each other, and having a gap therebetween;

a pixel region and a driving circuit, each of the pixel region and the driving circuit comprising thin film transistors;

a liquid crystal material between the first and second substrates;

a sealing member between the first and second substrates to maintain the liquid crystal material between the first and second substrates; and

a region where the gap varies in an order of 0.25 μ

m or more,

wherein the driving circuit is provided in the region, and

wherein the pixel region is provided outside the region.

22. A display device according to claim 21, wherein the liquid crystal panel is a transmission type liquid crystal panel.

23. A display device according to claim 21, wherein the liquid crystal panel is a reflection type liquid crystal panel.

24. A display device according to claim 21, wherein the gap is from 1 to 5 μ

m.

25. A display device according to claim 21, wherein the display device is incorporated in at least one selected from the group consisting of a mobile computer, a head-mount display, a video camera, a projector and a portable telephone.

26. A display device comprising:

a liquid crystal panel comprising;

a first substrate and a second substrate opposed to each other, and having a gap therebetween;

a pixel region and a driving circuit, each of the pixel region and the driving circuit comprising thin film transistors;

a liquid crystal material between the first and second substrates;

a sealing member between the first and second substrates to maintain the liquid crystal, material between the first and second substrates; and

a region where the gap varies in an order of 0.25 μ

m or more,

wherein the driving circuit is provided in the region,

wherein the pixel region is provided outside the region, and

wherein the liquid crystal panel has no spacer between the first and second substrates.

27. A display device according to claim 26, wherein the liquid crystal panel is a transmission type liquid crystal panel.

28. A display device according to claim 26, wherein the liquid crystal panel is a reflection type liquid crystal panel.

29. A display device according to claim 26, wherein the gap is from 1 to 5 μ

m.

30. A display device according to claim 26, wherein the display device is incorporated in at least one selected from the group consisting of a mobile computer, a head-mount display, a video camera, a projector and a portable telephone.

31. A display device comprising:

a liquid crystal panel comprising;

a first substrate and a second substrate opposed to each other, and having a gap therebetween;

a pixel region and a driving circuit, each of the pixel region and the driving circuit comprising thin film transistors;

a liquid crystal material between the first and second substrates;

a sealing member between the first and second substrates to maintain the liquid crystal material between the first and second substrates; and

a region where the gap varies in an order of 0.25 μ

m or more,

wherein the driving circuit is provided in the region,

wherein the pixel region is provided outside the region, and

wherein the liquid crystal panel has an across corners size of less than 2 inches.

32. A display device according to claim 31, wherein the liquid crystal panel is a transmission type liquid crystal panel.

33. A display device according to claim 31, wherein the liquid crystal panel is a reflection type liquid crystal panel.

34. A display device according to claim 31, wherein the gap is from 1 to 5 μ

m.

35. A display device according to claim 31, wherein the display device is incorporated in at least one selected.from the group consisting of a mobile computer, a head-mount display, a video camera, a projector and a portable telephone.

36. A display device comprising:

a liquid crystal panel comprising;

a first substrate and a second substrate opposed to each other, and having a gap therebetween;

a pixel region and a driving circuit, each of the pixel region and the driving circuit comprising thin film transistors;

a liquid crystal material between the first and second substrates;

a sealing member between the first and second substrates to maintain the liquid crystal material between the first and second substrates; and

a region where the gap varies in an order of 0.25 μ

m or more,

wherein the driving circuit is provided in the region,

wherein the pixel region is provided outside the region, and

wherein the liquid crystal panel has no spacer between the first and second substrates, and has an across corners size of less than 2 inches.

37. A display device according to claim 36, wherein the liquid crystal panel is a transmission type liquid crystal panel.

38. A display device according to claim 36, wherein the liquid crystal panel is a reflection type liquid crystal panel.

39. A display device according to claim 36, wherein the gap is from 1 to 5 μ

m.

40. A display device according to claim 36, wherein the display device is incorporated in at least one selected from the group consisting of a mobile computer, a head-mount display, a video camera, a projector and a portable telephone.