LIQUID CRYSTAL CELL

• US 3,871,746 A
• Filed: 06/06/1973
• Issued: 03/18/1975
• Est. Priority Date: 06/06/1972
• Status: Expired due to Term

• Current Assignee: Hiromichi Nishimura, Hiroshi Ukihashi, Katsuo Uchijima, Ryujiro Muto, Shigemasa Furuuchi
• Original Assignee: Hiromichi Nishimura, Hiroshi Ukihashi, Katsuo Uchijima, Ryujiro Muto, Shigemasa Furuuchi
• Inventors: Furuuchi, Shigemasa, Ukihashi, Hiroshi, Nishimura, Hiromichi, Muto, Ryujiro, Uchijima, Katsuo
• Primary Examiner(s): Ansher, Harold
• Application Number:
  US05/367,527
• Time in Patent Office: 650 Days
• Field of Search: 350/16LC 23/23LC 252/48LC 161/45,189,1,586,408-410
• US Class Current: 349/154
• CPC Class Codes: C09K 2323/057 Ester polymer, e.g. polycarbonate, polyacrylate or polyester
• CPC Class Codes: G02F 1/1339 Gaskets; Spacers; Sealing of cells

Abstract

A liquid crystal cell which is formed from a pair of plates, at least one of which is transparent, and wherein the space between said plates is filled with a liquid crystal material and wherein said plates are sealed with a sealant made of tetrafluoroethylene-ethylene-copolymer or a chlorotrifluoroethylene-ethylene-copolymer.

Claims

1. IN A LIQUID CRYSTAL CELL FILLED WITH A LIQUID CRYSTAL MATERIAL BETWEEN THE PAIR OF PLATES SEALED WITH A SEALANT AND DISPOSED AT A DESIGNATED DISTANCE FROM ONE ANOTHER BY A SPACING ELEMENT THEREFOR, THE IMPROVEMENT WHICH COMPRISES TJ HE USE OF A SEALANT OF TETRAFLUOROETHYLENE-ETHYLENE COPOLYMER OR CHLOROTRIFLUOROETHYLENE-ETHYLENE COPOLYMER.

2. The liquid crystal cell of claim 1, wherein the copolymer is a tetrafluoroethylene-ethylene copolymer having a mole ratio of tetrafluoroethylene component to ethylene component ranging from 40/60 - 70/30 and a volumetric flow rate of 30 - 300 mm3/sec.

3. The liquid crystal cell of claim 1, wherein the copolymer is a chlorotrifluoroethylene-ethylene copolymer having a mole ratio of chlorotrifluoroethylene component to ethylene component ranging from 40/60 - 70/30 and a volumetric flow rate of 30 - 300 mm3/sec..

4. The liquid crystal cell of claim 1, wherein the plates of said liquid crystal cell are sealed with the combination of said spacing element with the tetrafluoroethylene-ethylene copolymer or the chlorotrifluoroethylene-ethylene copolymer.

5. The liquid crystal cell of claim 2, wherein said spacing element is used in combination with said sealant.

6. The liquid crystal cell of claim 1, wherein said spacing element is used in combination with said sealant.

7. The liquid crystal cell of claim 4, wherein said spacing element is glass beads having an average diameter of 5 - 50 Mu .

8. The liquid crystal cell of claim 4, wherein said spacing element is ceramic beads having an average diameter of 5 - 50 Mu .

9. The liquid crystal cell of claim 4, wherein said spacing element is metal balls having an average diameter of 5 - 50 Mu .

10. The liquid crystal cell of claim 4, wherein said spacing element is plastic beads having an average diameter of 5 - 50 Mu .