# US 2021/0240027 A1 · Liquid crystal cells

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- Number: US 2021/0240027 A1
- Document ID: US20210240027A1
- Status: Published application
- Kind: A1
- Application number: 17/161,940
- Filed: 2021-01-29
- Published: 2021-08-05
- Earliest claimed: 2020-01-31
- Assignees: Flexenable Limited
- Applicants: Flexenable Limited
- Inventors: Barry Wild; William Reeves
- Web page: https://patentgrep.com/patent/US20210240027A1

## CPC

- G02F 1/133305: {Flexible substrates, e.g. plastics, organic film}
- G02F 1/13396: {Spacers having different sizes}
- G02F 1/13394: {spacers regularly patterned on the cell subtrate, e.g. walls, pillars (G02F1/133377 takes precedence)}
- G02F 1/13398: {Spacer materials; Spacer properties}
- 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

## Abstract

A liquid crystal cell comprising liquid crystal material contained between two plastics film components, wherein the liquid crystal material is interspersed with spacers, wherein (a) the area occupied by spacers is between about 0.25% and about 0.5% of the sum of (a) the area occupied by spacers and (b) the area occupied by the liquid crystal material.

## Claims

### Claim 1

A liquid crystal cell comprising liquid crystal material contained between two plastics film components, wherein the liquid crystal material is interspersed with spacers, wherein (a) the area occupied by spacers is between about 0.25% and about 0.5% of the sum of (a) the area occupied by spacers and (b) the area occupied by the liquid crystal material.

### Claim 2 (depends on 1)

The liquid crystal cell according to claim 1, wherein the spacers are arranged in a regular or substantially regular hexagonal pattern.

### Claim 3 (depends on 1)

The liquid crystal cell according to claim 1, wherein the spacers have a cross-sectional diameter of about 20 microns and a height of about 7.5 microns.

### Claim 4 (depends on 1)

The liquid crystal cell according to claim 1, wherein the spacers have a cross-sectional diameter of greater than 10 microns.

### Claim 5 (depends on 4)

The liquid crystal cell according to claim 4, wherein the spacers have a cross-sectional diameter of less than 30 microns.

### Claim 6 (depends on 5)

The liquid crystal cell according to claim 5, wherein the spacers have a cross-sectional diameter in the range of 15 to 25 microns.

### Claim 7 (depends on 1)

The liquid crystal cell according to claim 1, wherein each of the two plastics film components comprises a single plastics support film having a thickness of about 60 microns.

### Claim 8 (depends on 7)

The liquid crystal cell according to claim 7, wherein the single plastics film comprises a cellulose triacetate (TAC) film.

### Claim 9 (depends on 1)

The liquid crystal cell according to claim 1, wherein the cross-sectional diameter of the spacers is greater than the height of the spacers.

### Claim 10 (depends on 1)

An electro-optic device comprising one or more liquid crystal cells according to claim 1.