Curved liquid crystal display

Patent metadata

Field	Value
Publication number	US-2016246135-A1
Application number	US-201615050252-A
Country	US
Kind code	A1
Filing date	Feb 22, 2016
Priority date	Feb 24, 2015
Publication date	Aug 25, 2016
Grant date	—

Abstract

A liquid crystal display includes a display substrate having pixel electrodes and a curvature along a first direction, an opposite substrate coupled to the display substrate and curved together with the display substrate, and a liquid crystal layer interposed between the display substrate and the opposite substrate. Each pixel electrode comprises a plurality of domains successively arranged along a second direction substantially perpendicular to the first direction, and further comprises branch electrodes positioned within each domain to be inclined with respect to the first and second directions, the branch electrodes of two domains adjacent to each other in the second direction being arranged in alternating manner.

First claim

What is claimed is:

1 . A liquid crystal display comprising:
a display substrate comprising a plurality of pixel electrodes and having a curvature along a first direction; an opposite substrate facing the display substrate, coupled to the display substrate, and curved corresponding to the display substrate; and a liquid crystal layer interposed between the display substrate and the opposite substrate, wherein each pixel electrode comprises a plurality of domains successively arranged along a second direction substantially perpendicular to the first direction, and further comprises branch electrodes positioned within each domain to be inclined with respect to the first and second directions, the branch electrodes of two domains adjacent to each other in the second direction being arranged in alternating manner.

2 . The liquid crystal display of claim 1 , wherein the branch electrodes of each domain are successively arranged along the first direction and spaced apart from each other.

3 . The liquid crystal display of claim 2 , wherein a first domain, a second domain, a third domain, and a fourth domain, which are successively arranged along the second direction, are defined in each of the pixel electrodes, and each of the pixel electrodes further comprises:
first branch electrodes disposed in the first domain and extending in a third direction; second branch electrodes disposed in the second domain and extending in a fourth direction; third branch electrodes disposed in the third domain and extending in a fifth direction; and fourth branch electrodes disposed in the fourth domain and extending in a sixth direction.

4 . The liquid crystal display of claim 3 , wherein the third direction is inclined in a counter-clockwise direction with respect to the first direction, the fourth direction is inclined in a clockwise direction with respect to the first direction, the fifth direction is opposite to the fourth direction, and the sixth direction is opposite to the third direction.

5 . The liquid crystal display of claim 4 , wherein a first angle between the first direction and the third direction is about +45 degrees, and a second angle between the first direction and the fourth direction is about −45 degrees.

6 . The liquid crystal display of claim 3 , wherein each of the pixel electrodes further comprises:
a first horizontal trunk electrode disposed between the first domain and the second domain and extending in the first direction; and a second horizontal trunk electrode disposed between the third domain and the fourth domain and extending in the first direction.

7 . The liquid crystal display of claim 6 , wherein the first and second branch electrodes protrude from the first horizontal trunk electrode, and the third and fourth branch electrodes protrude from the second horizontal trunk electrode.

8 . The liquid crystal display of claim 7 , wherein, the first branch electrodes and the second branch electrodes are not symmetrically disposed with each other with respect to the first horizontal trunk electrode.

9 . The liquid crystal display of claim 7 , wherein, the third branch electrodes and the fourth branch electrodes are not symmetrically disposed with each other with respect to the second horizontal trunk electrode.

10 . The liquid crystal display of claim 7 , wherein first center lines of the second branch electrodes are arranged in alternating manner with second center lines of the third brance electrodes.

11 . The liquid crystal display of claim 7 , wherein:
each of the first to fourth branch electrodes has a first width; each of the first to fourth slits has a second width, the first width being greater than the second width; each of the second branch electrodes is shifted in the first direction by a half of the first width, relative to the corresponding first branch electrodes; each of the third branch electrodes is shifted in a seventh direction opposite to the first direction by the half of the first width, relative to the corresponding second branch electrodes; and each of the fourth branch electrodes is shifted in the first direction by the half of the first width, relative to the corresponding third branch electrodes.

12 . The liquid crystal display of claim 7 , wherein each of the pixel electrodes further comprises:
a first vertical trunk electrode extending in the second direction and connected to the first branch electrodes, the second branch electrodes, and the first horizontal trunk electrode; and a second vertical trunk electrode extending in the second direction and connected to the third branch electrodes, the fourth branch electrodes, and the second horizontal trunk electrode.

13 . The liquid crystal display of claim 12 , wherein a width of the first horizontal trunk electrode decreases with distance from the first vertical trunk electrode, and a width of the second horizontal trunk electrode decreases with distance from the second vertical trunk electrode.

14 . The liquid crystal display of claim 12 , wherein at least one of the first vertical trunk electrode and the second vertical trunk electrode has a width that decreases with distance from a center portion thereof.

15 . The liquid crystal display of claim 7 , wherein each of the pixel electrodes further comprises a domain connection electrode disposed between the second domain and the third domain to electrically connect the second branch electrodes and the third branch electrodes.

16 . The liquid crystal display of claim 15 , wherein the domain connection electrode is disposed proximate to a center of an interface between the second domain and the third domain.

17 . The liquid crystal display of claim 16 , wherein the domain connection electrode is inclined in a direction substantially parallel to the first branch electrodes and the fourth branch electrodes.

18 . The liquid crystal display of claim 1 , wherein each of the pixel electrodes further comprises:
a first branch connection electrode extending in the first direction and connecting edges of the first branch electrodes to each other; and a second branch connection electrode extending in the first direction and connecting edges of the fourth branch electrodes to each other.

19 . The liquid crystal display of claim 18 , wherein each of the pixel electrodes further comprises:
a third branch connection electrode extending in the first direction and connecting edges of the second branch electrodes to each other; and a fourth branch connection electrode extending in the first direction and connecting edges of the third branch electrodes to each other.

20 . The liquid crystal display of claim 19 , wherein each of the pixel electrodes further comprises a domain connection electrode disposed between the second domain and the third domain to electrically connect the third branch connection electrode and the fourth branch connection electrode.

21 . The liquid crystal display of claim 20 , wherein the domain connection electrode is disposed proximate to both opposing ends of an interface between the second domain and the third domain.

22 . The liquid crystal display of claim 1 , wherein the opposite substrate comprises a common electrode arranged so as to generate an electric field in cooperation with the pixel electrodes.

23 . The liquid crystal display of claim 22 , wherein liquid crystal alignment directions, in which liquid crystal molecules are inclined in response

Assignees

• Samsung Display Co Ltd

Inventors

• Tae Changil
• Woo Suwan

Classifications

• G02F1/133707

  Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes · CPC title

• G02F1/133753 Primary

  with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle · CPC title

• G02F1/134309 Primary

  characterised by their geometrical arrangement · CPC title

• G02F1/134336 Primary

  Matrix · CPC title

• G02F1/133305 Primary

  Flexible substrates, e.g. plastics, organic film · CPC title