Method for manufacturing liquid crystal alignment film and reaction apparatus for manufacturing the same

Patent metadata

Field	Value
Publication number	US-9529216-B2
Application number	US-201514648861-A
Country	US
Kind code	B2
Filing date	Feb 12, 2015
Priority date	Feb 6, 2015
Publication date	Dec 27, 2016
Grant date	Dec 27, 2016

Abstract

A method for manufacturing a liquid crystal alignment film and a reaction apparatus are provided, the method has steps of: disposing a liquid crystal cell onto a first reaction apparatus, and providing a temperature value, a voltage value, and an ultraviolet radiation, so that a liquid crystal alignment monomer in the liquid crystal cell generates a polymerization reaction; transferring the liquid crystal to a second reaction apparatus if the transferring time threshold value is reached; determining whether the liquid crystal cell is transferred to the second reaction apparatus or not; executing a warning if the liquid crystal cell is not transferred to the second reaction apparatus; and lifting the liquid crystal cell away from a platform of the first reaction apparatus through an ejector pin disposed in the platform thereof if the dangerous time threshold value is reached.

First claim

What is claimed is:

1. A method for manufacturing a liquid crystal alignment film, comprising steps of:
disposing a liquid crystal cell onto a platform of a first reaction apparatus, and controlling a temperature range, a voltage range and an ultraviolet radiation for the liquid crystal cell, so that a liquid crystal alignment monomer in the liquid crystal cell generates a polymerization reaction;
determining whether a period of time of the liquid crystal cell staying in the first reaction apparatus reaches a transferring time threshold value;
transferring the liquid crystal cell to a second reaction apparatus if the transferring time threshold value is reached;
determining whether the liquid crystal cell is transferred to the second reaction apparatus or not;
if the liquid crystal cell is transferred to the second reaction apparatus, then returning the period of time of the liquid crystal cell in the second reaction apparatus to zero and re-counting the time;
if the liquid crystal cell is not transferred to the second reaction apparatus, executing a warning by means of a sound, a flash, and/or a message for moving out the liquid crystal cell;
determining whether the time of the liquid crystal cell staying in the first reaction apparatus reaches a dangerous time threshold value; and
lifting the liquid crystal cell away from the platform of the first reaction apparatus through an ejector pin disposed in the platform thereof if the dangerous time threshold value is reached.

2. The method for manufacturing a liquid crystal alignment film according to claim 1 , wherein the transferring time threshold value is 4 to 5 minutes, and the dangerous time threshold value is 5 to 6 minutes.

3. The method for manufacturing a liquid crystal alignment film according to claim 1 , wherein in the step of lifting the liquid crystal cell away from the platform of the first reaction apparatus through the ejector pin disposed in the platform thereof if the dangerous time threshold value is reached, a length of the ejector pin is greater than or equal to 5 mm.

4. The method for manufacturing a liquid crystal alignment film according to claim 1 , wherein before the step of disposing the liquid crystal cell onto the platform of the first reaction apparatus, further comprising steps of:
preparing a liquid crystal mixture comprising liquid crystal molecules and the liquid crystal alignment monomer; and
preparing the liquid crystal cell comprising a first substrate and a second substrate, wherein the liquid crystal mixture is injected therebetween and then the first substrate and the second substrate are sealed for forming the liquid crystal cell.

5. A method for manufacturing a liquid crystal alignment film, comprising steps of:
disposing a liquid crystal cell onto a platform of a first reaction apparatus, and controlling a temperature range, a voltage range and an ultraviolet radiation for the liquid crystal cell, so that a liquid crystal alignment monomer of the liquid crystal cell generates a polymerization reaction;
determining whether a period of time of the liquid crystal cell staying in the first reaction apparatus reaches a transferring time threshold value;
transferring the liquid crystal to a second reaction apparatus if the transferring time threshold value is reached;
determining whether the liquid crystal cell is transferred to the second reaction apparatus or not;
executing a warning if the liquid crystal cell is not transferred to the second reaction apparatus;
determining whether the period of time of the liquid crystal cell staying in the first reaction apparatus reaches a dangerous time threshold value; and
lifting the liquid crystal cell away from the platform of the first reaction apparatus through an ejector pin disposed in the platform thereof if the dangerous time threshold value is reached.

6. The method for manufacturing a liquid crystal alignment film according to claim 5 , wherein the transferring time threshold value is 4 to 5 minutes, and the dangerous time threshold value is 5 to 6 minutes.

7. The method for manufacturing a liquid crystal alignment film according to claim 5 , wherein after the step of determining whether the liquid crystal cell is transferred to the second reaction apparatus or not, further comprising a step of:
if the liquid crystal cell is transferred to the second reaction apparatus, then returning the period of time of the liquid crystal cell in the second reaction apparatus to zero and re-counting the time.

8. The method for manufacturing a liquid crystal alignment film according to claim 5 , wherein if the liquid crystal cell is not transferred to the second reaction apparatus, the step of executing the warning comprises:
executing the warning by means of a sound, a flash, and/or a message for moving out the liquid crystal cell.

9. The method for manufacturing a liquid crystal alignment film according to claim 5 , wherein in the step of lifting the liquid crystal cell away from the platform of the first reaction apparatus through the ejector pin disposed in the platform thereof if the dangerous time threshold value is reached, a length of the ejector pin is greater than or equal to 5 mm.

10. The method for manufacturing a liquid crystal alignment film according to claim 5 , wherein before the step of disposing the liquid crystal cell onto the platform of the first reaction apparatus, further comprising steps of:
preparing a liquid crystal mixture comprising liquid crystal molecules and the liquid crystal alignment monomer; and
preparing the liquid crystal cell comprising a first substrate and a second substrate wherein the liquid crystal mixture is injected therebetween and then the first substrate and the second substrate are sealed for forming the liquid crystal cell.

11. A liquid crystal alignment film reaction apparatus for manufacturing a liquid crystal alignment film through a polymerization reaction processed in a liquid crystal cell, comprising:
a temperature control module disposed on a platform adapted to preset a temperature range;
a voltage module adapted to provide a default voltage range;
an ultraviolet module adapted to provide a default illumination ultraviolet light;
a timing module adapted to count a time after the liquid crystal cell is disposed onto the platform;
a first determining module adapted to determine whether a current counting time reaches a transferring time threshold value;
a transfer module adapted to transfer the liquid crystal cell to a second reaction apparatus if the current counting time reaches the transferring time threshold value;
a second determining module adapted to determine whether the liquid crystal cell is transferred to the second reaction apparatus or not;
a warning module adapted to execute a warning if the liquid crystal cell is not transferred to the second reaction apparatus;
a third determining module adapted to determine whether the current counting time reaches a dangerous time threshold value; and
a control module adapted to lift the liquid crystal cell away from the platform through an ejector pin disposed in the platform if the dangerous time threshold value is reached.

12. The reaction apparatus according to claim 11 , wherein the transferring time threshold value is 4 to 5 minutes, and the dangerous time threshold value is 5 to 6 minutes.

13. The reaction apparatus according to claim 11 , wherein a length of the ejector pin is greater than or equal to 5 mm.

14. The reaction apparatus according to claim 11 , wherein the warning module executes the warning by means of a sound, a flash, and/or a message.

Assignees

• Shenzhen China Star Optoelectrics Tech Co Ltd
• Shenzhen China Star Optoelect

Inventors

• Zhao Rentang
• Hsieh Chung-Ching

Classifications

• G02F1/133711 Primary

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

• G02F2001/133715

  Physics · mapped topic

• G02F1/1341

  Filling or closing of cells · CPC title

• G02F1/1303 Primary

  Apparatus specially adapted to the manufacture of LCDs · CPC title

• G02F1/133788

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