Liquid crystal display

Patent metadata

Field	Value
Publication number	US-9759959-B2
Application number	US-201514641198-A
Country	US
Kind code	B2
Filing date	Mar 6, 2015
Priority date	Mar 21, 2014
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

A liquid crystal display including a first substrate, a pixel electrode on the first substrate and including a first subpixel electrode and a second subpixel electrode separated from each other and located in one pixel area, a second substrate facing the first substrate, a common electrode on the second substrate, and a liquid crystal layer between the first substrate and the second substrate, wherein a first voltage applied to the first subpixel electrode is higher than a second voltage applied to the second subpixel electrode, wherein the first subpixel electrode includes first branch electrodes, the second subpixel electrode includes second branch electrodes, the second subpixel electrode is located around the pixel area to enclose the first subpixel electrode, wherein the first branch electrodes and the second branch electrodes face each other in a boundary portion of the first subpixel electrode and the second subpixel electrode.

First claim

What is claimed is:

1. A liquid crystal display comprising: a first substrate; a pixel electrode on the first substrate and comprising a first subpixel electrode and a second subpixel electrode separated from each other and located in one pixel area; a second substrate facing the first substrate; a common electrode on the second substrate; and a liquid crystal layer between the first substrate and the second substrate, wherein the first subpixel electrode comprises a plurality of first branch electrodes and the second subpixel electrode comprises a plurality of second branch electrodes, wherein the second subpixel electrode is located around the pixel area to enclose four or more sides of the first subpixel electrode and a first voltage to be applied to the first subpixel electrode is higher than a second voltage to be applied to the second subpixel electrode, wherein the plurality of first branch electrodes and the plurality of second branch electrodes face each other in a boundary portion of the first subpixel electrode and the second subpixel electrode, wherein, in the boundary portion, the plurality of first branch electrodes comprise a third branch electrode protruding toward the second branch electrode and a fourth branch electrode not protruded toward the second branch electrode, the fourth branch electrode comprising two extension electrodes adjacent to and at opposing sides of an extension of the third branch electrode and shorter in length than the extension of the third branch electrode, and wherein, in the boundary portion, the plurality of second branch electrodes comprise a fifth branch electrode not protruded toward the first branch electrode and a sixth branch electrode protruding toward the first branch electrode.

2. The liquid crystal display of claim 1 , wherein
the third branch electrode faces the fifth branch electrode, and
the fourth branch electrode faces the sixth branch electrode.

3. The liquid crystal display of claim 2 , wherein
the third branch electrode and the fourth branch electrode are alternately arranged, and
the fifth branch electrode and the sixth branch electrode are alternately arranged.

4. The liquid crystal display of claim 3 , wherein
the third branch electrode and the fourth branch electrode are alternately arranged one by one, and
the fifth branch electrode and the sixth branch electrode are alternately arranged one by one.

5. The liquid crystal display of claim 4 , wherein
the first voltage is higher than the second voltage,
the shape of the first subpixel electrode is a polygonal shape, and
the shape of the second subpixel electrode comprises four polygons enclosing the first subpixel electrode.

6. The liquid crystal display of claim 5 , wherein the polygonal shape is a hexagon.

7. The liquid crystal display of claim 5 , wherein:
the first subpixel electrode further comprises a cross stem comprising a transverse stem and a longitudinal stem; and
the plurality of first branch electrodes extend in four different directions from the cross stem.

8. The liquid crystal display of claim 7 , wherein
the second subpixel electrode further comprises an outer stem located around the pixel area, and
the plurality of second branch electrodes extend in four different directions from the outer stem.

9. The liquid crystal display of claim 3 , wherein
the third branch electrode and the fourth branch electrode are alternately arranged in twos or more, and
the fifth branch electrode and the sixth branch electrode are alternately arranged in twos or more.

10. The liquid crystal display of claim 9 , wherein
the first voltage is higher than the second voltage,
the shape of the first subpixel electrode is a polygonal shape, and
the second subpixel electrode comprises four polygons enclosing the first subpixel electrode.

11. The liquid crystal display of claim 10 , wherein the polygonal shape is a hexagon.

12. The liquid crystal display of claim 9 , wherein:
the first subpixel electrode further comprises a cross stem comprising a transverse stem and a longitudinal stem; and
the plurality of first branch electrodes extend in four different directions from the cross stem.

13. The liquid crystal display of claim 12 , wherein:
the second subpixel electrode further comprises an outer stem located around the pixel area; and
the plurality of second branch electrodes extend in four different directions from the outer stem.

Assignees

• Samsung Display Co Ltd

Inventors

• Shin Dong-Chul
• Kwon Oh Jeong
• Park Heung Shik
• Yun Sung-Jae
• Kim Su Jin
• Park Jae Hong
• Shin Ki Chul
• Yoon Joo Young
• Lee Hyeok Jin

Classifications

• G02F2001/13373

  Physics · mapped topic

• G02F2001/134345

  Physics · mapped topic

• G02F1/133707

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

• G02F1/134309 Primary

  characterised by their geometrical arrangement · CPC title

• G02F1/134345

  Subdivided pixels, e.g. for grey scale or redundancy · CPC title