Liquid crystal display panel with polymer spacers containing a percentage of epoxy groups

• US 4,983,023 A
• Filed: 10/06/1988
• Issued: 01/08/1991
• Est. Priority Date: 10/07/1987
• Status: Expired due to Fees

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.), Kitazawa Yakuhin Company Limited, Tosoh Corporation
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.), Kitazawa Yakuhin Company Limited, Tosoh Corporation
• Inventors: Kitamura, Takashi, Kitazawa, Takeshi, Nakagawa, Kenichi
• Primary Examiner(s): Miller, Stanley D.
• Assistant Examiner(s): GROSS, ANITA P
• Application Number:
  US07/254,036
• Time in Patent Office: 824 Days
• Field of Search: 350/339 R, 350/344, 523/414
• US Class Current: 349/157
• CPC Class Codes: G02F 1/13392 spacers dispersed on the cell substrate, e.g. spherical particles, microfibres

Abstract

A liquid crystal display panel comprises at least two base plates spaced by a sealant on the peripheral portion of the plates and liquid crystal in the space between the base plates. The liquid crystal contains a spacer of rigid particles and polymer particles having 10 to 30% by weight of an epoxy group.

Claims

1. A liquid crystal display panel comprising at least two base plates spaced by a sealant on the peripheral portion of the plates and liquid crystal in the space between the base plates, wherein said liquid crystal contains as a spacer rigid particles and polymer particles having 10 to 30% by weight of an epoxy group.

2. The liquid crystal display panel according to claim 1 wherein said rigid particles are one of glass fiber, plastic particles and inorganic particles.

3. The liquid crystal display panel according to claim 1 wherein said polymer particles are acrylic polymer particles which are treated with polyglycidyl ether.

4. The liquid crystal display panel according to claim 1 wherein said polymer particles are prepared by polymerizing an epoxy group-containing vinyl monomer.

5. The liquid crystal display panel according to claim 1 wherein said base plates have a film formed thereon and wherein said epoxy groups of the polymer particles react with the film and base plates to chemically bond thereto.

6. The liquid crystal display panel according to claim 1 wherein said polymer particles are selected from the group consisting of acrylic crosslinked particles, styrene crosslinked particles, ester crosslinked particles, and urethane crosslinked particles.

7. The liquid crystal display panel according to claim 1 wherein the epoxy group is introduced by treating the polymer particles with epihalohydrine or polyglycidyl ether.

8. The liquid crystal display panel according to claim 1 wherein the polymer particles contain 20 to 30% by weight of an epoxy group.

9. The liquid crystal display panel according to claim 1 wherein the polymer particles contain 28 to 29% by weight of an epoxy group.