Liquid crystal display

Patent metadata

Field	Value
Publication number	US-2016147118-A1
Application number	US-201514710185-A
Country	US
Kind code	A1
Filing date	May 12, 2015
Priority date	Nov 25, 2014
Publication date	May 26, 2016
Grant date	—

Abstract

A liquid crystal display according to an embodiment includes: a lower panel including a pixel electrode having a first subpixel electrode and a second subpixel electrode and an insulating layer between the first subpixel electrode and the second subpixel electrode; an upper panel including a common electrode; and a liquid crystal layer disposed between the lower panel and the upper panel. The first subpixel electrode includes a first plate portion, a first stem having a cross portion extending from the first plate portion and a protrusion extending from the cross portion, and a plurality of first branches extending from the first plate portion and the first stem. The second subpixel electrode includes a second plate portion having an opening and a plurality of second branches extending from the second plate portion. The cross portion does not overlap with the second plate portion. The protrusion overlaps with the second plate portion.

First claim

What is claimed is:

1 . A liquid crystal display, comprising:
a lower panel including a pixel electrode having a first subpixel electrode and a second subpixel electrode and an insulating layer disposed between the first subpixel electrode and the second subpixel electrode; an upper panel including a common electrode; and a liquid crystal layer disposed between the lower panel and the upper panel, wherein the first subpixel electrode includes a first plate portion, a first stem having a cross portion extending from the first plate portion in a cross shape and a protrusion extending from the cross portion, and a plurality of first branches extending from the first plate portion and the first stem, the second subpixel electrode includes a second plate portion having an opening therein and a plurality of second branches extending from the second plate portion, and the cross portion is free from overlap with the second plate portion and the protrusion overlaps with the second plate portion.

2 . The liquid crystal display of claim 1 , wherein:
the first subpixel electrode is positioned on the insulating layer and the second subpixel electrode is positioned below the insulating layer.

3 . The liquid crystal display of claim 2 , wherein:
the common electrode is formed as a plate.

4 . The liquid crystal display of claim 2 , wherein:
the second plate portion surrounds the plurality of first branches.

5 . The liquid crystal display of claim 4 , wherein:
the opening of the second plate portion has a planar, rhombus shape.

6 . The liquid crystal display of claim 5 , wherein:
an edge of the first branch and an edge of the second plate portion adjacent to the first branch coincide with each other.

7 . The liquid crystal display of claim 5 , wherein:
an edge of the first branch and an edge of the second plate portion adjacent to the first branch overlap with each other.

8 . The liquid crystal display of claim 1 , wherein:
the first plate portion has a planar, rhombus shape.

9 . The liquid crystal display of claim 8 , wherein:
a length corresponding to a distance from the center of the rhombus shaped first plate portion to one side is about 14 μm or less.

10 . The liquid crystal display of claim 8 , wherein:
the first stem extends in a diagonal direction of the rhombus shaped first plate portion.

11 . The liquid crystal display of claim 1 , wherein:
the first subpixel electrode is configured to receive a first voltage, the second subpixel electrode is configured to receive a second voltage, and a ratio of the second voltage to the first voltage is about 0.83 or less.

12 . The liquid crystal display of claim 1 , wherein:
the plurality of first branches includes a plurality of minute branches extending in four different directions, and the plurality of second branches includes a plurality of minute branches extending in the four different directions.

13 . The liquid crystal display of claim 12 , wherein:
the four different directions are orthogonal to each other or parallel to each other.

14 . The liquid crystal display of claim 1 , wherein:
the plurality of first branches extends from portions of the first stem excluding the protrusion.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Se Hyun
• Chang Hak Sun
• Shin Ki Chul
• Ryu Jang Wi
• Shin Cheol
• Oh Ho Kil

Classifications

• G02F1/134309 Primary

  characterised by their geometrical arrangement · CPC title

• G02F2001/134345

  Physics · mapped topic

• G02F1/133345

  Insulating layers (G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence) · CPC title

• G02F1/134345

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

• G02F1/133707 Primary

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