Liquid crystal display device

Patent metadata

Field	Value
Publication number	US-10317754-B2
Application number	US-201715824737-A
Country	US
Kind code	B2
Filing date	Nov 28, 2017
Priority date	May 29, 2015
Publication date	Jun 11, 2019
Grant date	Jun 11, 2019

Abstract

A liquid crystal display device including a first substrate including a first display electrode and a second display electrode that is disposed opposite the first display electrode with an insulator interposed between the first display electrode and the second display electrode, a second substrate disposed opposite the first substrate; and a liquid crystal layer disposed between the first substrate and the second substrate. The first display electrode includes a plurality of first openings in each pixel, and an interior angle of at least one apex constituting the first opening is different from interior angles of another apex in each of the plurality of first openings.

First claim

What is claimed is:

1. A liquid crystal display device comprising:
a first substrate including a first display electrode and a second display electrode that is disposed opposite the first display electrode with an insulator interposed between the first display electrode and the second display electrode;
a second substrate disposed opposite the first substrate; and
a liquid crystal layer disposed between the first substrate and the second substrate,
wherein the first display electrode includes a plurality of first openings in each pixel,
in each of the plurality of first openings an interior angle of at least one apex constituting the first opening is different from interior angle of another apex, and
the interior angle of at least three apexes constituting the first opening and on a same end of the opening are more than 90 degrees and less than 180 degrees.

2. The liquid crystal display device according to claim 1 , wherein the second display electrode includes a plurality of second openings,
the plurality of first openings include a third opening and a fourth opening,
the fourth opening is adjacent to the third opening in a long direction of the pixel, and
one of the plurality of second openings overlaps with the third opening and the fourth opening.

3. The liquid crystal display device according to claim 1 , wherein the second display electrode includes a plurality of second openings, and
a whole opening region in each of the plurality of second openings overlaps with each of the plurality of first openings in planar view.

4. The liquid crystal display device according to claim 1 , wherein the second display electrode includes a plurality of second openings, and
the plurality of second openings are arranged in a direction orthogonal to a long direction of the first opening.

5. The liquid crystal display device according to claim 4 , wherein the plurality of second openings are arranged in a long direction of the first opening.

6. The liquid crystal display device according to claim 1 , wherein the second display electrode includes a plurality of second openings, and in each of the plurality of second openings, a width in a first direction that is of a direction in which the plurality of first openings are arranged is equal to a width in the first direction of an electrode portion between the two first openings adjacent to each other or a width in the first direction of the first opening.

7. The liquid crystal display device according to claim 1 , wherein the second display electrode includes a plurality of second openings, and
each of the plurality of second openings is formed into one of a square shape, a rectangular shape, a triangular shape, a rhombic shape, a polygonal shape, a circular shape, and an elliptic shape.

8. The liquid crystal display device according to claim 1 , wherein at least one of the first substrate and the second substrate includes a projection that controls alignment of liquid crystal.

9. The liquid crystal display device according to claim 1 , wherein the interior angles of all apexes constituting the first opening are more than 90 degrees and less than 180 degrees.

10. The liquid crystal display device according to claim 1 , wherein each of the plurality of first openings is symmetric with respect to a center of a short side of the pixel.

11. A liquid crystal display device comprising:
a first substrate including a first display electrode and a second display electrode that is disposed opposite the first display electrode with an insulator interposed between the first display electrode and the second display electrode;
a second substrate disposed opposite the first substrate; and
a liquid crystal layer disposed between the first substrate and the second substrate,
wherein the first display electrode includes a plurality of first openings in each pixel,
in each of the plurality of first openings an interior angle of at least one apex constituting the first opening is different from interior angle of another apex,
the second display electrode includes a plurality of second openings,
one of the plurality of second openings overlaps with a straight portion of an edge of one of the plurality of first openings in planar view, and
the straight portion is parallel to a short direction of the pixel.

12. The liquid crystal display device according to claim 11 , wherein each of the plurality of second openings overlaps with a straight portion of the edge of each of the plurality of first openings in planar view.

13. The liquid crystal display device according to claim 11 , wherein the plurality of first openings are disposed in parallel to each other,
the plurality of first openings are disposed such that a long direction of the first opening is parallel to the short direction of the pixel, and
at least two of the plurality of second openings are disposed along the long direction of the first opening.

14. A liquid crystal display device comprising:
a first substrate including a first display electrode and a second display electrode that is disposed opposite the first display electrode with an insulator interposed between the first display electrode and the second display electrode;
a second substrate disposed opposite the first substrate; and
a liquid crystal layer disposed between the first substrate and the second substrate,
wherein the first display electrode includes a plurality of first openings in each pixel,
in each of the plurality of first openings an interior angle of at least one apex constituting the first opening is different from interior angle of another apex,
the second display electrode includes a plurality of second openings,
one of the plurality of second openings does not overlap with each of the plurality of first openings in planar view, and the interior angles of at least three apexes constituting the first opening and on a same end of the opening are more than 90 degrees and less than 180 degrees.

15. The liquid crystal display device according to claim 14 , wherein each of the plurality of second openings does not overlap with each of the plurality of first openings in planar view.

16. The liquid crystal display device according to claim 14 , wherein the plurality of first openings are disposed in parallel to each other,
the plurality of first openings are disposed such that a long direction of the first opening is parallel to a short direction of the pixel,
the plurality of second openings include a fifth opening and a sixth opening, and
the fifth opening and the sixth opening are disposed along the long direction of the first opening.

17. The liquid crystal display device according to claim 16 , wherein the plurality of first openings include a seventh opening and an eighth opening,
the seventh opening is adjacent to the eighth opening in a long direction of the pixel, and
the fifth opening and the sixth opening are disposed between the seventh opening and the eighth opening in planar view.

18. The liquid crystal display device according to claim 16 , wherein the fifth opening is larger than the sixth opening.

19. The liquid crystal display device according to claim 17 , wherein a centerline divides the first electrode in half in the short direction of the pixel,
the fifth opening is deviated away from the centerline, and disposed toward the seventh opening, and
the sixth opening is deviated away from the centerline, and disposed toward the seventh opening.

20. The liquid crystal display device according to claim 17 , w

Assignees

• Panasonic Liquid Crystal Displ

Inventors

• Mimura Koji

Classifications

• G02F1/134363 Primary

  for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS] · CPC title

• G02F2001/134318

  Physics · mapped topic

• G02F2001/13712

  Physics · mapped topic

• G02F2001/134372

  Physics · mapped topic

• G02F1/134309 Primary

  characterised by their geometrical arrangement · CPC title