Liquid crystal display

Patent metadata

Field	Value
Publication number	US-9541804-B2
Application number	US-201514711592-A
Country	US
Kind code	B2
Filing date	May 13, 2015
Priority date	Oct 6, 2014
Publication date	Jan 10, 2017
Grant date	Jan 10, 2017

Abstract

A liquid crystal display including: a lower electrode; an upper electrode facing the lower electrode; and a liquid crystal layer disposed between the lower electrode and the upper electrode and including a plurality of liquid crystal molecules aligned perpendicular to surfaces of the lower electrode and the upper electrode, wherein the lower electrode includes a center electrode disposed at the center thereof, a first cutout disposed at the center of the center electrode, and a plurality of minute branches disposed extending outwardly from a side edge of the center electrode, and the upper electrode includes a second cutout disposed between the minute branches and the first cutout, a third cutout connected to upper and lower vertices of the second cutout to form a boundary among a plurality of sub-regions together with the first cutout and a fourth cutout connected to left and right vertices of the second cutout.

First claim

What is claimed is:

1. A liquid crystal display comprising:
a lower electrode;
an upper electrode facing the lower electrode; and
a liquid crystal layer disposed between the lower electrode and the upper electrode and including a plurality of liquid crystal molecules aligned perpendicular to surfaces of the lower electrode and the upper electrode,
wherein the lower electrode includes a center electrode disposed at the center thereof, a first cutout disposed at the center of the center electrode, and a plurality of minute branches extending outwardly from a side edge of the center electrode, and
the upper electrode includes a second cutout disposed between the minute branches and the first cutout, a third cutout connected to upper and lower vertices of the second cutout to form a boundary among a plurality of sub-regions together with the first cutout, and a fourth cutout connected to left and right vertices of the second cutout.

2. The liquid crystal display of claim 1 , wherein the fourth cutout includes:
a first branch cutout that is perpendicular to an adjacent data line and connected to left and right vertices of the second cutout; and
a second branch cutout that is separated from left and right ends of the upper electrode at a distance and connected to the left and right vertices of the second cutout and a vertex of the first branch cutout.

3. The liquid crystal display of claim 2 , wherein the second branch cutout is separated from the left and right ends of the upper electrode by 8 μm or more.

4. The liquid crystal display of claim 2 , wherein the first cutout includes a cross-shaped cutout, a central cutout disposed at the center of the cross-shaped cutout, and a central minute cutout that extends from the cross-shaped cutout and the central cutout.

5. The liquid crystal display of claim 4 , wherein the cross-shaped cutout includes a horizontal cutout and a vertical cutout that cross each other at the center of the center electrode.

6. The liquid crystal display of claim 5 , wherein the second branch cutout includes a gap that is disconnectedly formed in a direction in which the horizontal cutout extends.

7. The liquid crystal display of claim 6 , wherein a width of the gap is equal to or smaller than 4.5 μm.

8. The liquid crystal display of claim 6 , wherein the horizontal cutout extends towards but ends before reaching the gap.

9. The liquid crystal display of claim 6 , wherein the horizontal cutout extends through the gap.

10. The liquid crystal display of claim 4 , wherein the central cutout is formed to have a polygonal shape including linear sides that are respectively disposed in the sub-regions and a vertex connected to the cross-shaped cutout.

11. The liquid crystal display of claim 4 , wherein the central minute cutout is disposed to extend in different directions in different sub-regions.

12. The liquid crystal display of claim 1 , wherein the second cutout is formed to have a polygonal shape including linear cutouts that are respectively disposed in the sub-regions and a vertex connected to the third cutout.

13. The liquid crystal display of claim 12 , wherein the second cutout is disposed to surround the first cutout.

14. The liquid crystal display of claim 1 , wherein the minute branches disposed in different sub-regions extend in different directions.

Assignees

• Samsung Display Co Ltd

Inventors

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

Classifications

• G02F1/133707

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

• G02F2001/134345

  Physics · mapped topic

• G02F1/134336 Primary

  Matrix · CPC title

• G02F2001/134318

  Physics · mapped topic

• G02F1/134345

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