Liquid crystal display

Patent metadata

Field	Value
Publication number	US-9904111-B2
Application number	US-201615180119-A
Country	US
Kind code	B2
Filing date	Jun 13, 2016
Priority date	Jul 3, 2015
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

Abstract

A liquid crystal display includes: a first panel including a first electrode; a second panel including a second electrode; and a liquid crystal layer between the first and second panels. The first electrode includes: a central electrode disposed in a central region of a pixel; an outer electrodes extending along a side of the central electrode; and a connection electrode which connects the outer electrode and the central electrode. A slit pattern is defined in the first electrode around the central electrode, and a liquid crystal control pattern is defined in the first electrode in a corner region of the pixel. Horizontal and vertical incisions, which divide the first electrode into a plurality of domains, are defined in the second electrode, an end portion of the outer electrode is disposed to correspond to the corner region, and the end portion of the outer electrode extends farther than the central electrode.

First claim

What is claimed is:

1. A liquid crystal display comprising:
a first panel comprising a first electrode;
a second panel comprising a second electrode and disposed opposite to the first panel; and
a liquid crystal layer comprising a liquid crystal and disposed between the first panel and the second panel,
wherein
the first electrode comprises:
a central electrode disposed in a central region of a pixel;
an outer electrode extending along a side of the central electrode; and
a connection electrode which is separate from and connects the outer electrode and the central electrode,

a slit pattern is defined in the first electrode around the central electrode and between the central electrode and the outer electrode,
a liquid crystal control pattern is defined in the first electrode in a corner region of the pixel extends to define an outer boundary of the pixel, is in contact with the outer electrode and is connected to the slit pattern,
horizontal and vertical incisions, which divide the first electrode into a plurality of domains, are defined in the second electrode,
an end portion of the outer electrode disposed adjacent to the liquid crystal control pattern is disposed to correspond to the corner region of the pixel, and
the end portion of the outer electrode extends farther than a corresponding side of the central electrode.

2. The liquid crystal display of claim 1 , wherein the outer electrode comprises:
a first outer electrode disposed in a direction parallel to a horizontal side of the central electrode; and
a second outer electrode disposed in a direction parallel to a vertical side of the central electrode,
wherein at least one end portion of the first and second outer electrodes is connected to the liquid crystal control pattern.

3. The liquid crystal display of claim 2 , wherein the first electrode further comprises:
a protruding electrode extending from the central electrode through the corner region of the pixel, and disposed between the first and second outer electrodes,
wherein the liquid crystal control pattern is defined between the protruding electrode and the first or second outer electrode.

4. The liquid crystal display of claim 2 , wherein
the slit pattern comprises:
a first slit pattern disposed parallel to the first outer electrode and between the first outer electrode and the central electrode; and
a second slit pattern that is disposed parallel to the second outer electrode and between the second outer electrode and the central electrode, and
wherein
an end portion of the first and second slit patterns is in contact with the connection electrode, and
another end portion of the first and second slit patterns is connected to the liquid crystal control pattern.

5. The liquid crystal display of claim 4 , wherein widths of the first and second slit patterns and the first and second outer electrodes are in a range of about 4 micrometers to about 8 micrometers.

6. The liquid crystal display of claim 4 , wherein
the liquid crystal control pattern is disposed parallel to the first slit pattern or the second slit pattern, and
the outer electrode further comprises an extension electrode which extends from the first outer electrode or the second outer electrode to the corner region of the pixel.

7. The liquid crystal display of claim 1 , wherein
the first electrode further comprises a plurality of branch electrodes extending from the central electrode in a predetermined direction toward the first and second slit patterns, and
the slit pattern further comprises a third slit pattern defined between the branch electrodes.

8. The liquid crystal display of claim 7 , wherein extension directions of the branch electrodes in different domains are different from each other.

9. The liquid crystal display of claim 7 , wherein a pitch of the branch electrodes is in a range of about 4 micrometers to about 8 micrometers.

10. The liquid crystal display of claim 7 , wherein a width of the branch electrodes is in a range of about 1 micrometer to about 5 micrometers.

11. The liquid crystal display of claim 7 , wherein an extension direction of the branch electrodes in a domain and a direction of an average azimuth angle of the liquid crystal in the domain are substantially the same as each other.

12. The liquid crystal display of claim 7 , further comprising:
a first polarizing plate disposed on the first panel; and
a second polarizing plates disposed on the second panel and having a polarization axis perpendicular to a polarization axis of the first polarizing plate,
wherein the extension direction of the branch electrode forms an angle in a range of about 30 degrees to about 60 degrees with respect to the polarization axis of the first or second polarizing plate.

13. The liquid crystal display of claim 7 , wherein widths of the branch electrode and the first, second and third slit patterns are substantially the same as each other.

14. The liquid crystal display of claim 1 , wherein a width of the outer electrode is in a range of about 1 micrometer to about 5 micrometers.

15. The liquid crystal display of claim 1 , wherein widths of the horizontal and vertical incisions are in a range of about 2 micrometers to about 5 micrometers.

16. The liquid crystal display of claim 1 , wherein the horizontal and vertical incisions extend farther than the outer electrode and is disposed to correspond to the connection electrode.

17. The liquid crystal display of claim 1 , wherein
a plurality of first electrodes defines the pixel, and
an intermediate section is defined between two adjacent first electrodes in the pixel.

18. The liquid crystal display of claim 17 , wherein the intermediate section comprises a connection section which connects the outer electrode of one of the two adjacent first electrodes and the outer electrode of the other of the two adjacent first electrodes.

19. The liquid crystal display of claim 1 , wherein the liquid crystal control pattern provides an electric filed vector which controls the liquid crystal disposed in the corner region of the pixel and the liquid crystal control pattern in a regular direction.

20. The liquid crystal display of claim 1 , wherein
an average polar angle of the liquid crystal is in a range of about 3.5 degrees to about 4.5 degrees, and
an average azimuth angle of the liquid crystal is in a range of about 40 degrees to about 45 degrees.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Se Hyun
• Oh Ik Han
• Jeong Youn Hak
• Hong Ki Pyo
• Namgung Wan
• Lee Ho Jun
• Shin Dong Chul

Classifications

• G02F1/133707 Primary

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

• G02F1/134309

  characterised by their geometrical arrangement · CPC title

• G02F1/136209

  Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element · CPC title