# US 7,608,211 B2 · Method of making a liquid crystal display device

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- Number: US 7,608,211 B2
- Document ID: US7608211B2
- Status: Granted
- Kind: B2
- Application number: 11/330,156
- Filed: 2006-01-12
- Published: 2006-06-01
- Granted: 2009-10-27
- Earliest claimed: 1999-03-25
- Assignees: LG Display Co., Ltd.
- Inventors: Mi Sook Nam; Young Seok Choi
- Web page: https://patentgrep.com/patent/US7608211B2

## CPC

- G02F 1/133711: {by organic films, e.g. polymeric films}
- C09K 2323/00: Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
- C09K 2323/02: Alignment layer characterised by chemical composition
- C09K 2323/021: Inorganic, e.g. glass or silicon oxide
- C09K 2323/025: Polyamide
- C09K 2323/027: Polyimide
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

## Abstract

The liquid crystal display device of the present invention comprises first and second substrates; a first alignment layer on the first substrate, wherein the first alignment layer includes (spacer S is oxygen, m=10˜10,000), the functional group R includes photo-sensitive constituents and/or non-photo-sensitive constituents, the photo-sensitive constituent includes a material selected from the group consisting of cinnamoyl derivatives, the non-photo-sensitive constituent includes a material selected from the group consisting of CnH2n, CnH2n+1, CnH2nOH, COCnH2n+1, COCnH2n, CnH2n+1−xFx, CnH2n−(x−1)F(x−1), CnH2n−xFxOH, COCnH2n+1−xFx (n=1˜10, x=1˜2n+1), and a combination thereof; and a liquid crystal layer between the first and second substrates.

## Claims

### Claim 1

A method of making a liquid crystal display device, comprising:
providing first and second substrates;
forming a first alignment layer on the first substrate,
wherein the first alignment layer includes
where spacer S is NH, where m=10˜10,000, where the functional group R includes at least one of a group consisting of photo-sensitive constituents and non-photo-sensitive constituents; and forming a liquid crystal layer between the first and second substrates.

### Claim 2 (depends on 1)

The method according to claim 1, further comprising: forming a second alignment layer on the second substrate.

### Claim 3 (depends on 2)

The method according to claim 2, wherein the second alignment layer includes a material selected from the group consisting of a pyranose polymer, a furanose polymer, polyvinyl cinnamate, polysiloxane cinnamate, polyvinyl alcohol, polyamide, polyimide, polyamic acid and silicone dioxide.

### Claim 4 (depends on 2)

The method according to claim 2, wherein at least one of the first and second alignment layers is divided into at least two domains for driving liquid crystal molecules in the liquid crystal layer differently on each domain.

### Claim 5 (depends on 1)

The method according to claim 1, wherein the photo-sensitive constituents include a material selected from the group consisting of cinnamoyl derivatives.

### Claim 6 (depends on 1)

The method according to claim 1, wherein the non-photo-sensitive Constituents include a material selected from the group consisting of H, CnH2n, CnH2n+1, CnH2nOH, COCnH2n+1, CnH2n+1−xFx, CnH2n−(x−1)F(x−1), CnH2n−(x−1)Fx−1OH, COCnH2n+1−xFx, where n=1˜10 and x=1˜2n+1, and any combination thereof.

### Claim 7 (depends on 4)

The method according to claim 4, wherein the cinnamoyl derivative includes at least one member selected from the group consisting of hydrogen, fluorine, chlorine, cyano, NO2, CH3, OCH3, CF3, OCF3, CnH2n+1, OCnH2n+1, C6H5, C6H4OCnH2n+1, CnH2n+1-xFx, OCnH2n+1-xFx, where n=1˜10 and x=1˜2n+1.

### Claim 8 (depends on 5)

The method according to claim 5, wherein the cinnamoyl derivative is
where X1 and X2 are each selected from the group consisting of hydrogen, fluorine, chlorine, CN, NO2, CH3, OCH3, CF3, OCF3; where k is 0 to 1; where Y is selected from the group consisting of hydrogen, fluorine, chlorine, cyano, NO2, CF3, OCF3, CnH2n+1, OCnH2n+1, CnH2n+1−xFx, OCnH2n+1−xFx, where n=1˜10 and x=1˜2n+1.