Method and apparatus for filling liquid crystal material

• US 5,862,839 A
• Filed: 01/24/1997
• Issued: 01/26/1999
• Est. Priority Date: 01/26/1996
• Status: Expired due to Fees

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Hashimoto, Tsukasa, Kitagawa, Kiyohiko, Maeda, Tomoya, Kaneda, Takafumi, Nakamura, Chihiro, Matsuoka, Susumu
• Primary Examiner(s): Douglas, Steven O.
• Application Number:
  US08/787,713
• Time in Patent Office: 732 Days
• Field of Search: 141/4, 141/5, 141/6, 141/7, 141/8, 141/21, 141/31, 141/63, 141/65, 141/237, 141/239, 141/113, 349/189, 349/154
• US Class Current: 141/7
• CPC Class Codes: G02F 1/1341 Filling or closing of cells

Abstract

A liquid crystal material filling apparatus which includes, in a vacuum chamber, a liquid crystal pot having a liquid crystal reservoir for storing a liquid crystal material. A groove part is coupled with the liquid crystal reservoir at a certain angle and contains a medium for holding the liquid crystal material. A filling jig cassette is provided to accommodate a plurality of liquid crystal panels having injection ports faced downwardly, and an elevation device is provided for moving the liquid crystal pot up and down. Also, a posture control mechanism is provided for switching a posture of the liquid crystal pot in accordance with the up/down movement of the liquid crystal pot thereby to cause the liquid crystal material to flow from the liquid crystal reservoir to the groove part at a raised position and bring the medium in touch with lower faces of the injection ports of the liquid crystal panels.

Claims

1. A method of filling liquid crystal panels with a liquid crystal material, the method comprising:

placing a liquid crystal material holder and at least one liquid crystal panel in a vacuum chamber, wherein said liquid crystal material holder includes a reservoir and a groove part communicating with and extending from said reservoir at an angle;

moving said liquid crystal material holder relative to said liquid crystal panel such that said groove part moves from an upwardly inclined position into a horizontal position so as to cause liquid crystal material to flow from said reservoir to said groove part; and

raising said liquid crystal material holder so that an injection port of said liquid crystal panel contacts a medium which is disposed in said groove part and holds liquid crystal material.

2. The method of filling liquid crystal panels with a liquid crystal material as claimed in claim 1, further comprising injecting a gas into the vacuum chamber.

3. The method of filling liquid crystal panels with a liquid crystal material as claimed in claim 1, further comprising regulating the flow of liquid crystal material between said reservoir and said groove part.

4. The method of filling liquid crystal panels with a liquid crystal material as claimed in claim 1, further comprising stirring and degassing liquid crystal material stored in said reservoir.

5. A method of filling liquid crystal panels with a liquid crystal material, the method comprising:

placing a liquid crystal material holder and a cassette holding a plurality of liquid crystal panels in a vacuum chamber, wherein said liquid crystal material holder includes a reservoir and a groove part extending from said reservoir;

moving said liquid crystal material holder upwardly toward said liquid crystal panels;

changing the posture of said groove part relative to said cassette as said liquid crystal material holder is moved toward said liquid crystal panels so as to cause liquid crystal material to flow from said reservoir into said groove part; and

contacting said injection ports of said liquid crystal panels with a medium disposed in said groove part, wherein said medium holds the liquid crystal material which initially flows into said liquid crystal panels via said injection ports by capillary action.

6. The method of filling liquid crystal panels with a liquid crystal material as claimed in claim 5, wherein the medium holding the liquid crystal material comprises a plurality of coil-like members, and each of said coil-like members has a central longitudinal axis in alignment with said injection ports of said liquid crystal panels.

7. The method of filling liquid crystal panels with a liquid crystal material as claimed in claim 5, further comprising injecting a gas into the vacuum chamber.

8. The method of filling liquid crystal panels with a liquid crystal material as claimed in claim 5, further comprising regulating the flow of liquid crystal material between said reservoir and said groove part.

9. The method of filling liquid crystal panels with a liquid crystal material as claimed in claim 5, further comprising stirring and degassing the liquid crystal material which is contained in said reservoir.

16. The liquid crystal material filling apparatus as claimed in claim 5, wherein each of said coil-like members is a coil spring.

10. An apparatus for filling a liquid crystal material, said apparatus comprising:

a vacuum chamber;

a liquid crystal pot having a reservoir for storing a liquid crystal material and a groove part extending from said reservoir at an angle, wherein said groove part is in communication with said reservoir for receiving liquid crystal material therefrom;

a liquid crystal holding medium disposed in said groove part;

a filling jig cassette for accommodating a plurality of liquid crystal panels having injection ports;

an elevation device for moving said liquid crystal pot upward and downward; and

a posture control mechanism for switching a posture of said liquid crystal pot in accordance with upward and downward movement of said liquid crystal pot in order to cause liquid crystal material to flow from said liquid crystal reservoir into said groove part, at a raised position thereof, and bring said liquid crystal holding medium into contact with downwardly-directed faces of the liquid crystal panel injection ports.

11. The liquid crystal material filling apparatus as claimed in claim 10, further comprising a flow regulating gate, provided between said liquid crystal reservoir and said groove part, for regulating the flow of liquid crystal material between said reservoir and said groove part.

12. The liquid crystal material filling apparatus as claimed in claim 11, further comprising a stirring device for stirring and degassing liquid crystal material contained in said liquid crystal reservoir.

13. The liquid crystal material filling apparatus as claimed in claim 10, further comprising a stirring device for stirring and degassing liquid crystal material contained in said reservoir.

14. The liquid crystal material filling apparatus as claimed in claim 10, wherein said liquid crystal holding medium comprises a plurality of coils, and each of said coils has a central axis which is oriented in a direction so as to intersect said liquid crystal panel injection ports.

15. The liquid crystal material filling apparatus as claimed in claim 10, wherein said liquid crystal holding medium comprises a plurality of coil-like members, and each of said coil-like members has a top portion which is engagable with said liquid crystal panel injection ports.

17. The liquid crystal material filling apparatus as claimed in claim 10, wherein a top portion of said liquid crystal holding medium is higher than adjacent upper surfaces of side walls of said groove part.

18. The liquid crystal material filling apparatus as claimed in claim 10, wherein said groove part defines a groove, and a width of said groove is wider than a width of a downward-directed face of said liquid crystal panel injection ports.