Liquid crystal display

Patent metadata

Field	Value
Publication number	US-9588377-B2
Application number	US-201514938611-A
Country	US
Kind code	B2
Filing date	Nov 11, 2015
Priority date	Apr 6, 2015
Publication date	Mar 7, 2017
Grant date	Mar 7, 2017

Abstract

A liquid crystal display includes a first substrate, a first pixel electrode disposed on the first substrate, a second pixel electrode overlapping the first pixel electrode, having an insulating layer disposed therebetween, wherein the second pixel electrode includes a plate-like part having an integrated shape, a plurality of branch electrodes extending from the plate-like part, and a cruciform cutout including a horizontal part and a vertical part intersecting each other at a center of the plate-like part, and the first pixel electrode includes a cruciform stem electrode having a horizontal stem and a vertical stem intersecting each other at the center.

First claim

What is claimed is:

1. A liquid crystal display, comprising:
a first substrate;
a first pixel electrode disposed on the first substrate;
a second pixel electrode overlapping the first pixel electrode, having an insulating layer disposed therebetween,
wherein the second pixel electrode includes a plate-like part having an integrated shape, a plurality of branch electrodes extending from the plate-like part, and a cruciform cutout including a horizontal part and a vertical part intersecting each other at a center of the plate-like part, and
the first pixel electrode includes a cruciform stem electrode having a horizontal stem and a vertical stem intersecting each other at the center.

2. The liquid crystal display of claim 1 , wherein:
the horizontal stem and the vertical stem have a constant width, and
the horizontal part and the vertical part also have a constant width.

3. The liquid crystal display of claim 2 , wherein:
the plurality of branch electrodes extend in four different directions.

4. The liquid crystal display of claim 3 , further comprising:
a second substrate facing the first substrate; and
a common electrode disposed inside the second substrate,
wherein the common electrode is provided as an integrated plate.

5. The liquid crystal display of claim 4 , wherein:
the first pixel electrode is applied with a voltage about 1.23 times as high as that applied to the second pixel electrode.

6. The liquid crystal display of claim 5 , wherein:
the second pixel electrode is applied with a voltage of about 8 volts and the first pixel electrode is applied with a voltage of about 10 volts or more.

7. The liquid crystal display of claim 1 , wherein:
the first pixel electrode has a rhombus shape at the center at which the horizontal stem and the vertical stem intersect each other, and
the cruciform cutout of the second pixel electrode has a cutout having a rhombus shape at the center at which the horizontal part and the vertical part intersect each other.

8. The liquid crystal display of claim 7 , wherein:
the horizontal stem and the vertical stem have a constant width,
the horizontal part and the vertical part also have a constant width, and
the plurality of branch electrodes extend in four different directions.

9. The liquid crystal display of claim 8 , further comprising:
a second substrate facing the first substrate; and
a common electrode disposed inside the second substrate,
wherein the common electrode is provided as an integrated plate.

10. The liquid crystal display of claim 9 , wherein:
the first pixel electrode is applied with a voltage 1.23 times as high as that applied to the second pixel electrode.

11. The liquid crystal display of claim 10 , wherein:
the second pixel electrode is applied with a voltage of about 8 volts and the first pixel electrode is applied with a voltage of about 10 volts or more.

12. The liquid crystal display of claim 1 , wherein:
the plurality of branch electrodes extend in four different directions, and
branch electrodes positioned left and right based on the vertical part are asymmetrical to each other and branch electrodes positioned up and down based on the horizontal part are also asymmetrical to each other.

13. The liquid crystal display of claim 12 , wherein:
the first pixel electrode has a rhombus shape at the center at which the horizontal stem and the vertical stem intersect each other, and
the cruciform cutout of the second pixel electrode has a cutout having a rhombus shape at the center at which the horizontal part and the vertical part intersect each other.

14. The liquid crystal display of claim 13 , wherein:
the horizontal stem and the vertical stem have a constant width, and
the horizontal part and the vertical part also have a constant width.

15. The liquid crystal display of claim 14 , further comprising:
a second substrate facing the first substrate; and
a common electrode disposed inside the second substrate,
wherein the common electrode is provided as an integrated plate.

16. The liquid crystal display of claim 15 , wherein:
the first pixel electrode is applied with a voltage about 1.23 times as high as that applied to the second pixel electrode.

17. The liquid crystal display of claim 16 , wherein:
the second pixel electrode is applied with a voltage of about 8 volts and the first pixel electrode is applied with a voltage of about 10 volts or more.

Assignees

• Samsung Display Co Ltd

Inventors

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

Classifications

• G02F1/133707 Primary

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

• G02F1/133345

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

• G02F2001/133738

  Physics · mapped topic

• G02F1/134309 Primary

  characterised by their geometrical arrangement · CPC title

• G02F1/13439

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