LIQUID CRYSTAL DISPLAY

• US 20130308084A1
• Filed: 05/13/2013
• Published: 11/21/2013
• Est. Priority Date: 05/15/2012
• Status: Active Grant

• Current Assignee: Trivale Technologies, LLC (Vector Capital Corporation)
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: NIWANO, Yasunori
• Granted Patent: US 9,140,934 B2
• Time in Patent Office: Days
• US Class Current: 349/155
• CPC Class Codes: G02F 1/1339 Gaskets; Spacers; Sealing of cells
• CPC Class Codes: G02F 1/13394 spacers regularly patterned on the cell subtrate, e.g. walls, pillars G02F1/133377 takes precedence
• CPC Class Codes: G02F 1/13396 Spacers having different sizes

Abstract

A liquid crystal display includes a liquid crystal display panel. The liquid crystal display panel includes a substrate and a substrate which are disposed opposite to each other, columnar spacers which are disposed on a surface of the substrate, and a liquid crystal layer filled between the substrates. A peripheral edge part of a display region has a dual PS structure in which the columnar spacer and the columnar spacer are disposed. A central part of the display region has any of a main PS structure in which only the columnar spacer is disposed, a sub PS structure in which only the columnar spacer is disposed, and the dual PS structure.

Claims

1. A liquid crystal display comprising:

a liquid crystal display panel for displaying a video,

said liquid crystal display panel including;

a first substrate and a second substrate which are disposed opposite to each other;

a plurality of columnar spacers disposed on a surface of said first substrate and providing a gap between said first substrate and said second substrate; and

a liquid crystal layer filled between said first substrate and said second substrate,

wherein said plurality of columnar spacers include at least one first columnar spacer and at least one second columnar spacer,

a height of said first columnar spacer in a non-pressure state in which a pressure is not received in a vertical direction is greater than that of said second columnar spacer in said non-pressure state,

a peripheral edge part of a display region has a dual PS structure in which said first columnar spacer and said second columnar spacer are disposed,

a central part of said display region has any of a main PS structure in which only said first columnar spacer is disposed, a sub PS structure in which only said second columnar spacer is disposed, and said dual PS structure, and

in the case in which said central part has said dual PS structure and a variation in a height between said first columnar spacer in said non-pressure state and said first columnar spacer compressed upon receipt of a pressure in a vertical direction is represented by Δ

PS,

there is satisfied a relational expression of Δ

PS of said first columnar spacer in said central part <

Δ

PS of said first columnar spacer in said peripheral edge part.

2. The liquid crystal display according to claim 1, wherein said central part has said dual PS structure,

said plurality of first columnar spacers and second columnar spacers are disposed in each of said central part and said peripheral edge part, and

a disposition density to be a rate of a total sum of areas in which said first columnar spacer is provided in contact with said first substrate in a unit area to said unit area is higher in said central part than said peripheral edge part.

3. The liquid crystal display according to claim 2, wherein said each of first columnar spacers is disposed in such a manner that said disposition density is gradually reduced from said central part toward said peripheral edge part.

4. The liquid crystal display according to claim 2, wherein a difference between heights of said first columnar spacer in said non-pressure state and said second columnar spacer in said non-pressure state is greater in said peripheral edge part than said central part.

5. The liquid crystal display according to claim 4, wherein said each of first columnar spacers and said each of second columnar spacers are constituted in such a manner that said difference between said heights is gradually increased from said central part toward said peripheral edge part.

6. The liquid crystal display according to claim 2, wherein said second substrate includes a first region to be a region which is opposed to said first columnar spacer in said peripheral edge part, and a second region to be a region which is opposed to said first columnar spacer in said central part, and

a step film higher than a surface of said second region is provided in said first region.

7. The liquid crystal display according to claim 2, wherein said second substrate includes a third region to be a region which is opposed to said second columnar spacer in said central part, and a fourth region to be a region which is opposed to said second columnar spacer in said peripheral edge part, and

a step film higher than a surface of said fourth region is provided in said third region.