Alignment device and manufacturing method for polymer stabilized vertical alignment liquid crystal panel

Patent metadata

Field	Value
Publication number	US-9632361-B2
Application number	US-201213503373-A
Country	US
Kind code	B2
Filing date	Jan 16, 2012
Priority date	Dec 21, 2011
Publication date	Apr 25, 2017
Grant date	Apr 25, 2017

Abstract

The present invention discloses an alignment device and a manufacturing method for polymer stabilized vertical alignment (PS-VA) liquid crystal panel. The method includes: forming a first substrate of PS-VA liquid crystal panel, the first substrate including a common electrode; forming a second substrate of the PS-VA liquid crystal panel, the second substrate including a pixel electrode; forming a liquid crystal layer between the first and second substrates, the liquid crystal layer containing negative liquid crystal molecules and ultraviolet-curable resin; applying an electrical voltage that exceeds a rotation threshold of the liquid crystal layer to the common electrode and the pixel electrode; and reciprocally moving an ultraviolet light source, which is composed of at least two ultraviolet light sources that are distributed parallel to each other in a first direction and respectively extend in a second direction, in such a direction as to have accumulation of ultraviolet light received by the ultraviolet-curable resin of the liquid crystal layer homogenized. Through the above operation, the present invention can make the accumulation of ultraviolet light received by the ultraviolet-curable resin of the liquid crystal layer homogenized so as to avoid the occurrence of displaying defects.

First claim

What is claimed is:

1. An alignment device for a polymer stabilized vertical alignment liquid crystal panel, the polymer stabilized vertical alignment liquid crystal panel comprising a first substrate, a second substrate, and a liquid crystal layer, the first substrate comprising a common electrode, the second substrate comprising a pixel electrode, the liquid crystal layer comprising negative liquid crystal molecules and ultraviolet-curable resin, wherein the alignment device comprises:
a voltage application module, which applies an electrical voltage that exceeds a rotation threshold of the liquid crystal layer to the common electrode and the pixel electrode;
a light source, which comprises at least two ultraviolet light sources that are distributed parallel in a first direction that is inclined with respect to the polymer stabilized vertical alignment liquid crystal panel and are spaced from each other in the first direction, the at least two ultraviolet light sources being spaced from the polymer stabilized vertical alignment liquid crystal panel by different distances so that a first one of the at least two ultraviolet light sources is spaced from the polymer stabilized vertical alignment liquid crystal panel by a first distance and a second one of the at least two ultraviolet light sources is spaced from the polymer stabilized vertical alignment liquid crystal panel by a second distance that is greater than the first distance, the ultraviolet light sources extending in a second direction and emitting ultraviolet lights of different intensities to irradiate the polymer stabilized vertical alignment liquid crystal panel, wherein the first one of the at least two ultraviolet light source emits ultraviolet light at a first intensity and the second one of the at least two ultraviolet light source emits ultraviolet light at a second intensity that is greater than the first intensity; and
a light source movement control module, which controls the light source to reciprocally move in such a direction as to have accumulation of ultraviolet light received by the ultraviolet-curable resin of the liquid crystal layer homogenized.

2. The alignment device as claimed in claim 1 , wherein the light source comprises multiple ultraviolet light sources that are arranged in a parallel and equally spaced manner.

3. The alignment device as claimed in claim 2 , wherein the light source movement control module controls the light source to move in the first direction by a first predetermined distance and to subsequently move in a direction opposite to the first direction by the first predetermined distance to return to a home position, the movements being cyclically repeatable.

4. The alignment device as claimed in claim 3 , wherein the first predetermined distance is a half of a spacing distance between the ultraviolet light sources or a multiple of a half of the spacing distance between the ultraviolet light sources.

5. The alignment device as claimed in claim 2 , wherein the light source movement control module controls the light source to move in the first direction by a second predetermined distance and to subsequently move in a direction opposite to the first direction by a distance that is twice of the second predetermined distance and to further move in the first direction by the second predetermined distance to return to a home position, the movements being cyclically repeatable.

6. The alignment device as claimed in claim 5 , wherein the second predetermined distance is a half of a spacing distance between the ultraviolet light sources or a multiple of a half of the spacing distance between the ultraviolet light sources.

7. The alignment device as claimed in claim 1 , wherein the alignment device further comprises a speed adjusting module, the speed adjusting module being coupled to the light source movement control module to supply a speed control signal to the light source movement control module, the speed control signal being applied to adjust moving speed of the light source.

8. The alignment device as claimed in claim 1 , wherein the alignment device further comprises a temperature control module, which controls temperature of the liquid crystal layer of the polymer stabilized vertical alignment liquid crystal panel, and a substrate retention module, which retains the polymer stabilized vertical alignment liquid crystal panel in position.

9. An alignment device for a liquid crystal panel, comprising:
a voltage application module, which applies, to a liquid crystal panel, an electrical voltage that exceeds a rotation threshold of the liquid crystal panel;
a light source, which comprises at least two ultraviolet light sources that are distributed parallel in a first direction that is inclined with respect to the liquid crystal panel and are spaced from each other in the first direction, the at least two ultraviolet light sources being spaced from the liquid crystal panel by different distances so that a first one of the at least two ultraviolet light sources is spaced from the liquid crystal panel by a first distance and a second one of the at least two ultraviolet light sources is spaced from the liquid crystal panel by a second distance that is greater than the first distance, the ultraviolet light sources extending in a second direction and emitting ultraviolet lights of different intensities to irradiate the liquid crystal panel, wherein the first one of the at least two ultraviolet light source emits ultraviolet light at a first intensity and the second one of the at least two ultraviolet light source emits ultraviolet light at a second intensity that is greater than the first intensity; and
a light source movement control module, which controls the light source to reciprocally move in such a direction as to have accumulation of ultraviolet light received by the liquid crystal panel homogenized.

10. The alignment device as claimed in claim 9 , wherein the light source comprises multiple ultraviolet light sources that are arranged in a parallel and equally spaced manner.

11. The alignment device as claimed in claim 10 , wherein the light source movement control module controls the light source to move in the first direction by a first predetermined distance and to subsequently move in a direction opposite to the first direction by the first predetermined distance to return to a home position, the movements being cyclically repeatable.

12. The alignment device as claimed in claim 11 , wherein the first predetermined distance is a half of a spacing distance between the ultraviolet light sources or a multiple of a half of the spacing distance between the ultraviolet light sources.

Assignees

• Yin Chonghui
• Shenzhen China Star Optoelect

Inventors

• Yin Chonghui

Classifications

• G02F2201/121

  common or background · CPC title

• G02F2202/023

  curable · CPC title

• G02F1/133711 Primary

  by organic films, e.g. polymeric films · CPC title

• G02F1/133788 Primary

  by light irradiation, e.g. linearly polarised light photo-polymerisation · CPC title

• G02F1/1393

  the birefringence of the liquid crystal being electrically controlled, e.g. ECB-, DAP-, HAN-, PI-LC cells (G02F1/1396, G02F1/141 take precedence) · CPC title