Display device

• US 8,786,934 B2
• Filed: 06/24/2011
• Issued: 07/22/2014
• Est. Priority Date: 06/25/2010
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Kimura, Hajime
• Primary Examiner(s): Jones, James
• Application Number:
  US13/168,025
• Publication Number:
  US 20110317250A1
• Time in Patent Office: 1,124 Days
• Field of Search: 359/296, 359/271, 345/107
• US Class Current: 359/296
• CPC Class Codes: G02F 1/167 by electrophoresis
• CPC Class Codes: G02F 1/1676 Electrodes
• CPC Class Codes: G02F 1/16766 for active matrices
• CPC Class Codes: G02F 2201/123 pixel
• CPC Class Codes: G09G 2310/0272 Details of drivers for data electrodes, the drivers communicating data to the pixels by means of a current
• CPC Class Codes: G09G 3/34 by control of light from an independent source
• CPC Class Codes: G09G 3/3446 with more than two electrodes controlling the modulating element

Abstract

In a device for displaying images by application of an electric field to a charged substance, a structure for reducing afterimages and a method for manufacturing the structure are provided. The device is a display device which includes a plurality of pixel electrodes and a charged layer (a layer including a charged substance) provided over the pixel electrodes. An end of one of two pixel electrodes that are adjacent to each other among the plurality of pixel electrodes has a depression in an end-face direction, and an end of the other of the pixel electrodes has a projection in the end-face direction. In a state in which the depression and the projection are in a set, a gap is formed between the two pixel electrodes.

Claims

1. A display device comprising:

a first driver circuit;

a second driver circuit;

a plurality of first wirings electrically connected to the first driver circuit;

a plurality of second wirings electrically connected to the second driver circuit;

a plurality of pixel electrodes, each pixel electrode overlapping with an intersection of one of the plurality of first wirings and one of the plurality of second wirings; and

a layer including a charged substance, the layer provided over the plurality of pixel electrodes,

wherein at least one end of two pixel electrodes adjacent to each other among the plurality of pixel electrodes includes a curved portion in an end-face direction.

2. The display device according to claim 1, wherein the layer including the charged substance includes a plurality of microcapsules.

3. The display device according to claim 2, wherein each of the plurality of microcapsules includes colored particles.

4. The display device according to claim 1, further comprising a counter electrode over the layer including the charged substance.

5. The display device according to claim 1, wherein the display device is a passive matrix display device.

6. The display device according to claim 1, wherein the display device is an active matrix display device.

7. A display device comprising:

a first driver circuit;

a second driver circuit;

a plurality of first wirings electrically connected to the first driver circuit;

a plurality of second wirings electrically connected to the second driver circuit;

a plurality of pixel electrodes, each pixel electrode overlapping with an intersection of one of the plurality of first wirings and one of the plurality of second wirings; and

a layer including a charged substance, the layer provided over the plurality of pixel electrodes,

wherein between two pixel electrodes adjacent to each other among the plurality of pixel electrodes, an end of one of the plurality of pixel electrodes includes a depression in an end-face direction,

wherein an end of the other of the plurality of pixel electrodes includes a projection in the end-face direction, and

wherein in a state in which the depression of the one of the plurality of pixel electrodes and the projection of the other of the plurality of pixel electrodes are in a set, a gap is formed between the two pixel electrodes.

8. The display device according to claim 7, wherein the layer including the charged substance includes a plurality of microcapsules.

9. The display device according to claim 8, wherein each of the plurality of microcapsules includes colored particles.

10. The display device according to claim 7, further comprising a counter electrode over the layer including the charged substance.

11. The display device according to claim 7, wherein the display device is a passive matrix display device.

12. The display device according to claim 7, wherein the display device is an active matrix display device.

13. A display device comprising:

a first driver circuit;

a second driver circuit;

a plurality of first wirings electrically connected to the first driver circuit;

a plurality of second wirings electrically connected to the second driver circuit;

a plurality of pixel electrodes, each pixel electrode overlapping with an intersection of one of the plurality of first wirings and one of the plurality of second wirings; and

a layer including a charged substance, the layer provided over the plurality of pixel electrodes,

wherein a gap is formed between two pixel electrodes adjacent to each other among the plurality of pixel electrodes,

wherein the gap includes three or more portions whose distances are equal to each other, and

wherein in the three or more portions, when middle points of the distances are linked in a line, the line has one or more vertexes.

14. The display device according to claim 13, wherein the layer including the charged substance includes a plurality of microcapsules.

15. The display device according to claim 14, wherein each of the plurality of microcapsules includes colored particles.

16. The display device according to claim 13, further comprising a counter electrode over the layer including the charged substance.

17. The display device according to claim 13, wherein the display device is a passive matrix display device.

18. The display device according to claim 13, wherein the display device is an active matrix display device.

19. A display device comprising:

a first driver circuit;

a second driver circuit;

a plurality of first wirings electrically connected to the first driver circuit;

a plurality of second wirings electrically connected to the second driver circuit;

a plurality of pixel electrodes, each pixel electrode overlapping with an intersection of one of the plurality of first wirings and one of the plurality of second wirings; and

a layer including a charged substance, the layer provided over the plurality of pixel electrodes,

wherein between two pixel electrodes adjacent to each other among the plurality of pixel electrodes, at least one end of the two pixel electrodes is curved and a gap is formed, and

wherein the gap includes three or more portions whose distances are equal to each other.

20. The display device according to claim 19, wherein the layer including the charged substance includes a plurality of microcapsules.

21. The display device according to claim 20, wherein each of the plurality of microcapsules includes colored particles.

22. The display device according to claim 19, further comprising a counter electrode over the layer including the charged substance.

23. The display device according to claim 19, wherein the display device is a passive matrix display device.

24. The display device according to claim 19, wherein the display device is an active matrix display device.

25. A display device comprising:

a first driver circuit;

a second driver circuit;

a plurality of first wirings electrically connected to the first driver circuit;

a plurality of second wirings electrically connected to the second driver circuit;

a plurality of pixel electrodes, each pixel electrode overlapping with an intersection of one of the plurality of first wirings and one of the plurality of second wirings; and

a layer including a charged substance, the layer provided over the plurality of pixel electrodes,

wherein a right end of a first pixel electrode in the plurality of pixel electrodes and a left end of a second pixel electrode adjacent to a right side of the first pixel electrode are curved and a first gap is formed between the first pixel electrode and the second pixel electrode,

wherein an upper end of the first pixel electrode and a lower end of a third pixel electrode adjacent to an upper side of the first pixel electrode are curved and a second gap is formed between the first pixel electrode and the third pixel electrode, and

wherein the first gap and the second gap include two or more portions whose distances are equal to each other.

26. The display device according to claim 25, wherein the layer including the charged substance includes a plurality of microcapsules.

27. The display device according to claim 26, wherein each of the plurality of microcapsules includes colored particles.

28. The display device according to claim 25, further comprising a counter electrode over the layer including the charged substance.

29. The display device according to claim 25, wherein the display device is a passive matrix display device.

30. The display device according to claim 25, wherein the display device is an active matrix display device.