# US 10,503,006 B2 · Reflective display and preparation method thereof

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- Number: US 10,503,006 B2
- Document ID: US10503006B2
- Status: Granted
- Kind: B2
- Application number: 15/571,702
- Filed: 2017-06-08
- Published: 2019-05-02
- Granted: 2019-12-10
- Earliest claimed: 2016-10-28
- Assignees: Boe Technology Group Co., Ltd.
- Applicants: Boe Technology Group Co., Ltd.
- Inventors: Kang Guo; Pengxia Liang; Xin Gu; Xiao Zhang
- Web page: https://patentgrep.com/patent/US10503006B2

## CPC

- G02F 1/1677: Structural association of cells with optical devices, e.g. reflectors or illuminating devices
- G02F 1/0128: {based on electro-mechanical, magneto-mechanical, elasto-optic effects}
- G02F 1/1333: Constructional arrangements; {Manufacturing methods}(G02F1/135, G02F1/136 take precedence)
- G02F 1/133512: {Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence)}
- G02F 1/133553: {Reflecting elements (associated to illuminating devices G02F1/133605)}
- G02F 1/134309: {characterised by their geometrical arrangement}
- G02F 1/1681: having two or more microcells partitioned by walls, e.g. of microcup type
- G02F 2201/08: light absorbing layer
- G02F 2201/121: common or background
- G02F 2201/123: pixel
- G02F 2203/02: reflective
- 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 reflective display includes a first substrate and a second substrate arranged oppositely, a first electrode provided on the first substrate, a transparent dielectric layer arranged on the side of the first substrate opposite to the second substrate, a second electrode provided on the second substrate, and immiscible electrostriction light-absorbing material and transparent liquid filled between the first substrate and the second substrate. The light incident into the reflective display can be totally reflected on the side of the transparent liquid next to the first substrate; the electrostriction light-absorbing material deforms under action of an electric field formed by the first electrode and the second electrode, which enables a spreading area of the side of the transparent liquid next to the first substrate change.

## Claims

### Claim 1

A reflective display, comprising: a first substrate and a second substrate arranged oppositely, a first electrode provided on the first substrate, a transparent dielectric layer arranged on a side of the first substrate, which side is opposite to the second substrate, a second electrode provided on the second substrate, and immiscible light-proof electrostriction light-absorbing material and transparent liquid filled between the first substrate and the second substrate, wherein
the light incident into the reflective display is totally reflected on a side of the transparent liquid next to the first substrate; and
the light-proof electrostriction light-absorbing material deforms under action of an electric field formed by the first electrode and the second electrode, which allows a spreading area of the transparent liquid on the side next to the first substrate to change.

### Claim 2 (depends on 1)

The reflective display according to claim 1, wherein the light-proof electrostriction light-absorbing material comprises a compound material from polyelectrolyte hydrogel and graphene oxide.

### Claim 3 (depends on 2)

The reflective display according to claim 2, wherein a mass percentage of the graphene oxide in the light-proof electrostriction light-absorbing material is 0.2% ˜10%.

### Claim 4 (depends on 2)

The reflective display according to claim 2, wherein the polyelectrolyte hydrogel comprises one or more of polyacrylamide, polyvinylpyrrolidone, and poly(2-acrylamido-2-methyl-1-propanesulfonic acid).

### Claim 5 (depends on 1)

The reflective display according to claim 1, wherein a material of the transparent dielectric layer is a transparent inorganic material or a transparent organic material, and refractive indexes of the inorganic material and the organic material are both 1.5˜2.0.

### Claim 6 (depends on 5)

The reflective display according to claim 5, wherein the organic material is polystyrene or acrylic resin; and the inorganic material is silicon dioxide, nitrogen silicon oxide or silicon nitride.

### Claim 7 (depends on 5)

The reflective display according to claim 5, wherein the transparent dielectric layer possesses a curved surface structure.

### Claim 8 (depends on 7)

The reflective display according to claim 7, wherein the curved surface structure is a semi-microspheres structure.

### Claim 9 (depends on 1)

The reflective display according to claim 1, wherein the transparent liquid is acetone, aqueous solution of acetone, or water.

### Claim 10 (depends on 1)

The reflective display according to claim 1, further comprising partition walls arranged between the first substrate and the second substrate,
wherein the partition walls define a plurality of different units, and the light-proof electrostriction light-absorbing material and the transparent liquid are provided in each of the units.

### Claim 11

A preparation method of a reflective display, comprising:
providing a first substrate and a second substrate;
forming a transparent dielectric layer and a first electrode on the first substrate;
forming a second electrode on the second substrate;
assembling the first substrate and the second substrate to form a cell, and filling immiscible light-proof electrostriction light-absorbing material and transparent liquid between the first substrate and the second substrate;
wherein light incident into the reflective display is totally reflected on a side of the transparent liquid next to the first substrate; and
the light-proof electrostriction light-absorbing material deforms under action of an electric field formed by the first electrode and the second electrode, which allows a spreading area of the transparent liquid on the side next to the first substrate to change.

### Claim 12 (depends on 11)

The preparation method of a reflective display according to claim 11, wherein forming of the light-proof electrostriction light-absorbing material comprises compounding polyelectrolyte hydrogel and graphene oxide.

### Claim 13 (depends on 12)

The preparation method of a reflective display according to claim 12, wherein a mass percentage of the graphene oxide in the light-proof electrostriction light-absorbing material is 0.2% ˜10%.

### Claim 14 (depends on 11)

The preparation method of a reflective display according to claim 11, wherein the transparent dielectric layer is prepared by a nano-imprinting process.

### Claim 15 (depends on 11)

The preparation method of a reflective display according to claim 11, further comprising pre-treating the light-proof electrostriction light-absorbing material before filling the transparent liquid between the first substrate and the second substrate.

### Claim 16 (depends on 6)

The reflective display according to claim 6, wherein the transparent dielectric layer possesses a curved surface structure.

### Claim 17 (depends on 16)

The reflective display according to claim 16, wherein the curved surface structure is a semi-microspheres structure.

### Claim 18 (depends on 2)

The reflective display according to claim 2, wherein the transparent liquid is acetone, aqueous solution of acetone, or water.

### Claim 19 (depends on 2)

The reflective display according to claim 2, further comprising partition walls arranged between the first substrate and the second substrate,
wherein the partition walls define a plurality of different units, and the light-proof electrostriction light-absorbing material and the transparent liquid are provided in each of the units.

### Claim 20 (depends on 2)

The reflective display according to claim 2, wherein a material of the transparent dielectric layer is a transparent inorganic material or a transparent organic material, and refractive indexes of the inorganic material and the organic material are both 1.5˜2.0.