Liquid crystal display device

Patent metadata

Field	Value
Publication number	US-9939691-B2
Application number	US-201514881494-A
Country	US
Kind code	B2
Filing date	Oct 13, 2015
Priority date	Oct 28, 2014
Publication date	Apr 10, 2018
Grant date	Apr 10, 2018

Abstract

A liquid crystal display according to an exemplary embodiment of the present invention includes: a first substrate; a gate line formed on the first substrate; an insulating layer formed on the gate line; and a first subpixel electrode and a second subpixel electrode that are formed on the insulating layer. Each of the first subpixel electrode and the second, subpixel electrode includes a first subregion and a second subregion. At least one of the first subregion and the second subregion includes a vertical stem, a horizontal stem extending from a middle of the vertical stem, and a plurality of minute branches laterally extending in a diagonal direction from the horizontal stem. The plurality of minute branches laterally extending from the horizontal stem are alternately branched with reference to the horizontal stem.

First claim

What is claimed is:

1. A liquid crystal display comprising:
a first substrate;
a gate line formed on the first substrate;
an insulating layer formed on the gate line; and
a first subpixel electrode and a second subpixel electrode that are formed on the insulating layer, each of the first subpixel electrode and the second subpixel electrode including a first subregion and a second subregion, each of the first subregion and the second subregion comprise a vertical stem, a horizontal stem extending from a middle of the vertical stem, and a plurality of minute branches laterally extending in a diagonal direction from the horizontal stem, the plurality of minute branches being alternately branched with reference to the horizontal stem,
wherein the first subregion and the second subregion are aligned in a direction parallel to the vertical stems of the first and the second subregions, and
wherein the vertical stem of the first subregion and the vertical stem of the second subregion are formed on opposite edges of the first subpixel electrode and the second subpixel electrode in the horizontal direction.

2. The liquid crystal display of claim 1 , wherein the width of one end of the horizontal stem that is adjacent to the vertical stem of the pixel electrode is wider than the width of the opposite end of the horizontal stem, which is not adjacent to the vertical stem.

3. The liquid crystal display of claim 1 , wherein the width of the horizontal stem is gradually decreased farther away from the vertical stem and thus has an oblique inclination.

4. The liquid crystal display of claim 1 , wherein an interface of the first subregion and the second subregion is obliquely formed.

5. The liquid crystal display of claim 4 , wherein the length of the plurality of minute branches extending in a first direction from the horizontal stem of the first subregion becomes the longest near the vertical stem of the first subregion and is shortened as proceeding away from the vertical stem.

6. The liquid crystal display of claim 5 , wherein the length of the plurality of minute branches extending in a second direction from the horizontal stem of the second subregion becomes the longest near the vertical stem of the second subregion and is shortened as proceeding away from the vertical stem.

7. A liquid crystal display comprising:
a first substrate;
a gate line formed on the first substrate;
an insulating layer formed on the gate line; and
a first subpixel electrode and a second subpixel electrode, each of the first subpixel electrode and the second subpixel electrode comprising a first subregion and a second subregion, each of the first subregion and the second subregion comprises a vertical stem, a horizontal stem extending from a middle of the vertical stem, and a plurality of minute branches laterally extending in a diagonal direction from the horizontal stem, a minute branch of the plurality of minute branches, which is the farthest from the vertical stem, being bent in a direction of the horizontal stem while forming a constant angle,
wherein the first subregion and the second subregion are aligned in a direction parallel to the vertical stems of the first and second subregions, and
wherein the vertical stem of the first subregion and the vertical stem of the second subregion are formed on opposite edges of the first subpixel electrode and the second subpixel electrode in the horizontal direction.

8. The liquid crystal display of claim 7 , wherein the constant angle implies an angle between an extension direction of the plurality of minute branches and the bent minute branch, and the angle is between 0 degree to 45 degrees.

9. The liquid crystal display of claim 7 , wherein a structure in which a minute branch is bent with a constant angle exists in one or more regions of the first subregion and the second subregion in the second subpixel area.

10. The liquid crystal display of claim 7 , wherein the minute branches laterally extending from the horizontal stem are alternately branched with reference to the horizontal stem.

11. The liquid crystal display of claim 7 , wherein a branch point of each of the minute branches laterally extending from the horizontal stem is formed in the same location.

12. A liquid crystal display comprising:
a first substrate;
a gate line formed on the first substrate;
an insulating layer formed on the gate line; and
a first subpixel electrode and a second subpixel electrode formed on the insulating layer, each of the first subpixel electrode and the second subpixel electrode comprising a first subregion and a second subregion, each of the first subregion and the second subregion comprises a vertical stem, a horizontal stem extending from a middle of the vertical stem, and a plurality of minute branches laterally extending in a diagonal direction from the horizontal stem, a protrusion structure formed at an end of each of the plurality of minute branches,
wherein the first subregion and the second subregion are aligned in a direction parallel to the vertical stems of the first and second subregions, and
wherein the vertical stem of the first subregion and the vertical stem of the second subregion are formed on opposite edges of the first subpixel electrode and the second subpixel electrode in the horizontal direction.

13. The liquid crystal display of claim 12 , wherein the protrusion structure is formed in the shape of a triangle.

14. The liquid crystal display of claim 12 , wherein the minute branches laterally extending from the horizontal stem are alternately branched with reference to the horizontal stem.

15. The liquid crystal display of claim 12 , wherein a branch point of each of the minute branches laterally extending from the horizontal stem is formed in the same location.

16. The liquid crystal display of claim 12 , wherein a vertical stem of the first subregion and a vertical stem of the second subregion of the first subpixel electrode are respectively formed at left and right edges in one pixel, and
a vertical stem of the first subregion and a vertical stem of the second subregion of the second subpixel electrode are respectively formed at left and right edges in one pixel.

17. The liquid crystal display of claim 1 , wherein the liquid crystal display is a curved-type liquid crystal display.

18. The liquid crystal display of claim 7 , wherein the liquid crystal display is a curved-type liquid crystal display.

Assignees

• Samsung Display Co Ltd

Inventors

• Shin Cheol
• Chang Hak Sun
• Kim Ka Eun
• Lee Se Hyun
• Shin Ki Chul

Classifications

• G02F2001/134345

  Physics · mapped topic

• G02F1/136286

  Wiring, e.g. gate line, drain line · 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

• G02F1/134336 Primary

  Matrix · CPC title