Display device with pixel electrode having a slit disposed at an angle with respect to branch electrode

Patent metadata

Field	Value
Publication number	US-9470935-B2
Application number	US-201514635700-A
Country	US
Kind code	B2
Filing date	Mar 2, 2015
Priority date	Sep 11, 2014
Publication date	Oct 18, 2016
Grant date	Oct 18, 2016

Abstract

A display device includes: a first substrate; a second substrate disposed to face the first substrate; a liquid crystal layer disposed between the first and second substrates; and a pixel electrode disposed on the first substrate and including a plurality of sub-pixel electrodes, wherein the sub-pixel electrode may include an outer electrode, a stem electrode extending in a direction substantially perpendicular to the outer electrode, and a plurality of branch electrodes extending in a predetermined direction from the outer electrode or the stem electrode, and wherein the sub-pixel electrode may be partitioned into first and second areas by the outer and stem electrodes and may include at least one slit disposed at a predetermined angle with respect to the branch electrode in the first area or the second area.

First claim

What is claimed is:

1. A display device comprising:
a first substrate;
a second substrate disposed to face the first substrate;
a liquid crystal layer disposed between the first and second substrates; and
a pixel electrode disposed on the first substrate and comprising a plurality of sub-pixel electrodes,
wherein the sub-pixel electrode comprises an outer electrode, a stem electrode extending in a direction substantially perpendicular to the outer electrode, and a plurality of branch electrodes extending in a predetermined direction from the outer electrode or the stem electrode, and
wherein the sub-pixel electrode is partitioned into first and second areas by the outer and stem electrodes and comprises at least one slit disposed at a predetermined angle with respect to the branch electrode in the first area or the second area.

2. The display device of claim 1 , wherein the first and second substrates have a predetermined radius of curvature.

3. The display device of claim 1 , wherein the outer electrode has a quadrangular shape.

4. The display device of claim 1 , wherein the branch electrode comprises:
a first branch electrode extending in a lower-right direction from the outer electrode;
a second branch electrode extending in an upper-left direction from the outer electrode and the stem electrode;
a third branch electrode extending in an upper-right direction from the outer electrode; and
a fourth branch electrode extending in a lower-left direction from the outer electrode and the stem electrode.

5. The display device of claim 4 , wherein the first and second branch electrodes are disposed in the first area and the third and fourth branch electrodes are disposed in the second area.

6. The display device of claim 1 , wherein the slit comprises a first slit disposed in the first area and a second slit disposed in the second area.

7. The display device of claim 6 , wherein the first slit or the second slit is disposed at an angle of more than 0 and 90 or less degrees with respect to the branch electrode.

8. The display device of claim 7 , wherein the first slit or the second slit is disposed at 45 degrees with respect to the branch electrode.

9. The display device of claim 6 , wherein the first and second slits are symmetric to each other with respect to the stem electrode.

10. The display device of claim 9 , wherein the first slit or the second slit is disposed at an angle of more than 0 and less than 90 degrees with respect to the stem electrode.

11. The display device of claim 1 , wherein the first and second areas of the sub-pixel electrode have the same area.

12. The display device of claim 1 , further comprising:
a first alignment layer on the first substrate;
a common electrode on the second substrate; and
a second alignment layer on the second substrate,
wherein at least one of the first alignment layer, the second alignment layer, and the liquid crystal layer comprises a photopolymer material.

13. The display device of claim 12 , wherein the photopolymer material comprises a reactive monomer or a reactive mesogen.

14. A display device comprising:
a first substrate;
a second substrate disposed to face the first substrate;
a liquid crystal layer disposed between the first and second substrates; and
a pixel electrode disposed on the first substrate and comprising a plurality of sub-pixel electrodes,
wherein the sub-pixel electrode comprises a stem slit partitioned into first and second areas, first and second stem electrodes that are symmetric to each other with respect to the stem slit, and a plurality of branch electrodes extending from the first stem electrode or the second stem electrode in a predetermined direction, and
wherein the first stem electrode or the second stem electrode is disposed at a predetermined angle with respect to the branch electrode.

15. The display device of claim 14 , wherein the first and second substrates have a predetermined radius of curvature.

16. The display device of claim 14 , wherein the branch electrode comprises:
a first branch electrode extending in an upper-left direction from the first stem electrode;
a second branch electrode extending in a lower-right direction from the first stem electrode;
a third branch electrode extending in a lower-left direction from the second stem electrode; and
a fourth branch electrode extending in an upper-right direction from the second stem electrode.

17. The display device of claim 14 , wherein the first stem electrode or the second stem electrode is disposed at an angle of more than 0 and 90 or less degrees with respect to the branch electrode.

18. The display device of claim 17 , wherein the first stem electrode or the second stem electrode is disposed at 45 degrees with respect to the branch electrode.

19. The display device of claim 14 , wherein the first stem electrode or the second stem electrode is disposed at an angle of more than 0 and less than 90 degrees with respect to the stem slit.

Assignees

• Samsung Display Co Ltd

Inventors

• Woo Su Wan
• Tae Chang Il

Classifications

• G02F1/13439

  characterised by their electrical, optical, physical properties; materials therefor; method of making · CPC title

• G02F1/134309 Primary

  characterised by their geometrical arrangement · CPC title

• G02F2001/134345

  Physics · mapped topic

• G02F2001/133726

  Physics · mapped topic

• G02F1/133711

  by organic films, e.g. polymeric films · CPC title