Liquid crystal display with spacers of specific densities which are adhesive and elastic

• US 5,142,395 A
• Filed: 03/23/1990
• Issued: 08/25/1992
• Est. Priority Date: 10/27/1987
• Status: Expired due to Term

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Nakajima, Hideiaka, Watanabe, Toshio, Yamazaki, Shunpei
• Primary Examiner(s): Miller, Stanley D.
• Assistant Examiner(s): TRICE, RONALD
• Application Number:
  US07/503,517
• Time in Patent Office: 886 Days
• Field of Search: 350/344, 350/350 S, 359/81, 359/100
• US Class Current: 349/157
• CPC Class Codes: G02F 1/13392 spacers dispersed on the cell substrate, e.g. spherical particles, microfibres

Abstract

An improved liquid crystal device is described. The distance between a pair of substrates is kept constant by means of spacers interposed therebetween. The spacers consist of two kinds of spacers. One kind of spacers is fusable and functions to prevent the distance from expanding. The other kind of spacers is non-fusable and functions to prevent the distance from contracting.

Claims

1. A liquid crystal device comprising:

a pair of substrates;

an electrode arrangement formed on at least one of said substrates;

a plurality of spacers disposed between said pair of substrates in order to maintain a gap between the substrates; and

a liquid crystal layer interposed between said substrates,

wherein said spacers contain fusible spacers and non-fusible spacers and a dispersion density of said non-fusible spacers is 1-15 particles/mm² and wherein a dispersion density of said fusible spacer is 50-150 particles/mm².

2. The liquid crystal device of claim 1, wherein said non-fusible spacers are made of glass fibers.

3. The liquid crystal device of claim 1 wherein a diameter of said fusible spacers is 1.5-3 times said non-fusible spacers.

4. A liquid crystal device comprising:

a pair of substrates;

an electrode arrangement formed on the inside surfaces of the pair of substrates;

a liquid crystal layer disposed between said substrates; and

a plurality of spacers distributed between said substrates in order to maintain the distance between said substrates constant wherein the distribution density of said spacers is 3 to 15 mm^-2,

wherein said spacers are made of a resilient material having adhesivity and wherein said spacers consist of plural kinds of spacers having different degrees of elasticity.

5. An electro-optical liquid crystal device comprising:

a pair of substrates;

an electrode arrangement formed on the inside surfaces of the pair of substrates;

a ferroelectric liquid crystal layer disposed between said substrates; and

a plurality of spacers distributed between said substrates in order to maintain the distance between said substrates constant;

wherein said spacers are made of a resilient material having adhesivity and have an elasticity of 10-35%.

6. The device of claim 5 wherein the distribution density of said spacers is 3 to 15 mm^-2.