Liquid crystal display

• US 6,977,704 B2
• Filed: 03/12/2002
• Issued: 12/20/2005
• Est. Priority Date: 03/30/2001
• Status: Expired due to Term

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Fujitsu Display Technologies Corporation (Fujitsu Limited)
• Inventors: Kataoka, Shingo
• Primary Examiner(s): Chowdhury, Tarifur R.
• Assistant Examiner(s): Kim, Richard H
• Application Number:
  US10/095,626
• Publication Number:
  US 20030048401A1
• Time in Patent Office: 1,379 Days
• Field of Search: 349130-136, 428/1.1, 428/1.3
• US Class Current: 349/130
• CPC Class Codes: G02F 1/1337 Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
• 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 1/133753 with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
• CPC Class Codes: G02F 1/13725 based on guest-host interaction G02F1/13762, G02F1/13737, take precedence
• 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

The invention relates to a liquid crystal display based on an MVA mode of multi-division alignment in which alignment states of liquid crystal molecules having a negative dielectric anisotropy are made different from each other, and provides a liquid crystal display in which a drop in transmittance is suppressed and response characteristics are improved. The liquid crystal display is constructed so as to include a pair of substrates having a predetermined cell gap and arranged opposite to each other, vertical alignment films formed between the pair of substrates, a liquid crystal layer sealed between the vertical alignment films and having a negative dielectric anisotropy, an alignment regulating structural member arranged on at least one of the pair of substrates, for regulating a total alignment direction of liquid crystal molecules in the liquid crystal layer at a time of voltage application, and a cured material provided in the liquid crystal layer and including a liquid crystal skeleton for tilting the liquid crystal molecules.

Claims

1. A liquid crystal display comprising:

a pair of substrates having a predetermined cell gap and arranged opposite to each other;

vertical alignment films formed between the pair of substrates;

a liquid crystal layer sealed between the vertical alignment films and having a negative dielectric anisotropy;

an alignment regulating structural member arranged on at least one of the pair of substrates, for regulating a total alignment direction of liquid crystal molecules in the liquid crystal layer at a time of voltage application; and

a cured material provided in the liquid crystal layer and including a liquid crystal skeleton formed in a state where the skeleton is tilted to the substrate for tilting the liquid crystal molecules.

2. A liquid crystal display according to claim 1, wherein when a tilt angle of one of the liquid crystal molecules on the alignment regulating structural member is θ

_pr, and the cured material includes the liquid crystal skeleton satisfying 0°

≦

θ

_pr<

45°

.

3. A liquid crystal display according to claim 1, further comprising an alignment regulating structural sub-member for tilting the liquid crystal molecules substantially parallel to each other in an extending direction of the sub-member.

4. A liquid crystal display according to claim 1, wherein the cured material is formed by polymerization of a photo-curing or thermosetting monomer.

5. A liquid crystal display according to claim 4, wherein a concentration of the monomer is 0.1 to 3 wt %.