# US 5,702,642 A · Polymeric compounds, and liquid crystal element using the same

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- Number: US 5,702,642 A
- Document ID: US5702642A
- Status: Granted
- Kind: A
- Application number: 08/797,348
- Filed: 1997-02-11
- Granted: 1997-12-30
- Earliest claimed: 1994-06-14
- Assignees: Sharp Kabushiki Kaisha; Kanto Kagaku Kabushiki Kaisha
- Inventors: Nobuaki Yamada; Shuichi Kozaki; Hoyo Mizobe; Masahiko Yoshida; Kenji Suzuki
- Web page: https://patentgrep.com/patent/US5702642A

## CPC

- C08F 22/1006: {of polyhydric alcohols or polyhydric phenols, e.g. ethylene glycol dimethacrylate}
- C08F 20/30: containing aromatic rings in the alcohol moiety
- C09K 19/42: Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40
- C09K 19/544: {as dispersing or encapsulating medium around the liquid crystal}
- C09K 19/56: Aligning agents
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

## Abstract

The polymeric compound of this invention is represented by the following general formula (I): ##STR1## wherein A represents a hydrogen atom or ##STR2## B represents a hydrogen atom or ##STR3## each of X.sub.1 and X.sub.2 represents independently a hydrogen atom or a methyl group, each of m and n represents independently an integer of 0 to 14, each of p and q represents independently 0 or 1, and each of Y1 , Y.sub.2, Y.sub.3, and Y.sub.4 represents independently a hydrogen atom or a fluorine atom, with the proviso that both A and B are not hydrogen atoms, p is 0 when m is 0, and q is 0 when n is 0. The liquid crystal display element of this invention includes a pair of substrates oppositely disposed with a gap therebetween, and a liquid crystal layer placed in said gap, at least one of said substrates being transparent, and said liquid crystal layer having a liquid crystal region, and a polymer wall surrounded by said liquid crystal region, wherein said liquid crystal layer includes a liquid crystal material, a polymeric polymer material, and the above-described polymeric compound. The liquid crystal display element prepared from the polymeric compound of this invention does not cause disclination lines, and has bright characteristics in the absence of an electric voltage.

## Claims

### Claim 1

A polymeric compound represented by the following general formula (I): ##STR48## wherein A represents ##STR49## B represents ##STR50## each of X.sub.1 and X.sub.2 represents independently a hydrogen atom or a methyl group, each of m and n represents independently an integer of 0 to 14, and each of Y.sub.3 and Y.sub.4 represents independently a hydrogen atom or a fluorine atom.

### Claim 2 (depends on 1)

The polymeric compound of claim 1, wherein in the general formula (I) each of m and n represents independently an integer of 2 to 12.

### Claim 3 (depends on 1)

A liquid crystal display element comprising a pair of substrates oppositely disposed with a gap therebetween, and a liquid crystal layer in said gap, at least one of said substrates being transparent,
said liquid crystal layer having a liquid crystal region and a polymer wall surrounding said liquid crystal region,
wherein said liquid crystal layer includes a liquid crystal material, a polymeric polymer material, and the polymeric compound of claim 1.

### Claim 4 (depends on 3)

The liquid crystal display element of claim 3, wherein said liquid crystal region comprises liquid crystal molecules, and the orientation of said liquid crystal molecules is either random, radial, concentric or spiral.

### Claim 5 (depends on 3)

The liquid crystal display element of claim 3, wherein an alignment film is placed on said substrates.

### Claim 6 (depends on 3)

The liquid crystal display element of claim 3, wherein said liquid crystal region comprises liquid crystal molecules, and the orientation of said liquid crystal molecules is TN, STN, ECB or FLC.

### Claim 7 (depends on 3)

The liquid crystal display element of claim 3, wherein said polymeric polymer material is a photocurable resin.