Vertically-aligned liquid crystal display with a small domain

• US 20050206819A1
• Filed: 05/23/2005
• Published: 09/22/2005
• Est. Priority Date: 06/13/2000
• Status: Abandoned Application

• Current Assignee: Jang-Kun Song
• Original Assignee: Jang-Kun Song
• Inventors: Song, Jang-Kun
• Application Number:
  US11/134,262
• Publication Number:
  US 20050206819A1
• Time in Patent Office: Days
• US Class Current: 349/130
• CPC Class Codes: G02F 1/133707 Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes
• CPC Class Codes: G02F 1/134336 Matrix
• CPC Class Codes: G02F 1/1393 the birefringence of the liquid crystal being electrically controlled, e.g. ECB-, DAP-, HAN-, PI-LC cells G02F1/1396, G02F1/141 take precedence

Abstract

Disclosed is a liquid crystal display comprising first and second substrates provided opposing one another; a liquid crystal layer made of liquid crystal material that is injected between the first and second substrates; pixel electrodes and a common electrode formed on at least one of the substrates, the pixel electrodes and common electrode generating an electric field that acts on the liquid crystal layer; and domain formation means for controlling a slanting direction of liquid crystal molecules within the liquid crystal layer, wherein m is an integer satisfying the following:
h/2(π/wp)^1/2−2≦m≦h/2(π/wp)^1/2+2 where m is a number of domains formed by dividing the pixel electrodes by the domain formation means, w is a length of a first direction of the pixel electrodes, h is a length of a second direction of the pixel electrodes, the second direction being perpendicular to the first direction, and p is a width of a second direction of the domain formation means.

Claims

1-18. -18. (canceled)

19. A liquid crystal display (LCD) comprising a domain having a long side having a length A and a short side having a length B, wherein A is no shorter than 3B.

20. The LCD of claim 19, wherein the domain has a quadrilateral shape.

21. The LCD of claim 19, wherein the domain is divided by an aperture.

22. The LCD of claim 19, wherein the domain is divided by a protrusion.

23. The LCD of claim 19, wherein the domain is divided by combination of an aperture and a protrusion.

24. The LCD of claim 19, further comprising a plurality of pixels, each pixel being divided into a plurality of domains by a domain divider,

wherein m is an integer satisfying the following:

h/2(π

/wp)^1/2−

2≦

m≦

h/2(π

/wp)^1/2+2,

where h is a height of the pixel region, w is a width of the pixel, m is a number of domains formed in the pixel and p is a width of the domain divider.