# US 10,871,697 B2 · Electrophoretic display device having hexagonal electrophoretic display units and driving method therof

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- Number: US 10,871,697 B2
- Document ID: US10871697B2
- Status: Granted
- Kind: B2
- Application number: 15/973,550
- Filed: 2018-05-08
- Published: 2019-09-12
- Granted: 2020-12-22
- Earliest claimed: 2018-03-09
- Assignees: E Ink Holdings Inc.
- Applicants: E Ink Holdings Inc.
- Inventors: Jui-I Chen
- Web page: https://patentgrep.com/patent/US10871697B2

## CPC

- G02F 1/167: by electrophoresis
- G02F 1/1675: Constructional details
- G02F 1/16753: Structures for supporting or mounting cells, e.g. frames or bezels
- G09G 3/003: {to produce spatial visual effects}
- G09G 3/344: {based on particles moving in a fluid or in a gas, e.g. electrophoretic devices (electrophoretic devices per se G02F1/167)}
- 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
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)

## Abstract

An electrophoretic display device includes a plurality of hexagonal electrophoretic display units adjoined together, in which each of the hexagonal electrophoretic display units is constituted by three rhombic electrophoretic display panels or one hexagonal electrophoretic display panel, and the hexagonal electrophoretic display panel has three rhombic regions; and a control module configured to control gray scale of each of the rhombic electrophoretic display panels or each of the rhombic regions.

## Claims

### Claim 1

An electrophoretic display device, comprising:
a plurality of hexagonal electrophoretic display units adjoined together, wherein each of the hexagonal electrophoretic display units is constituted by three rhombic electrophoretic display panels or one hexagonal electrophoretic display panel, and the hexagonal electrophoretic display panel has three rhombic regions;
a controller configured to control gray scale of each of the rhombic electrophoretic display panels or each of the rhombic regions; and
a triangular electrophoretic display unit adjoined with one of the hexagonal electrophoretic display units.

### Claim 2 (depends on 1)

The electrophoretic display device of claim 1, further comprising:
a power supply electrically connected to the hexagonal electrophoretic display units.

### Claim 3 (depends on 1)

The electrophoretic display device of claim 1, wherein the rhombic electrophoretic display panel or the hexagonal electrophoretic display panel has a frame covering an edge of the rhombic electrophoretic display panel or the hexagonal electrophoretic display panel.

### Claim 4 (depends on 1)

The electrophoretic display device of claim 1, wherein the rhombic electrophoretic display panel or the hexagonal electrophoretic display panel does not have a frame covering an edge of the rhombic electrophoretic display panel or the hexagonal electrophoretic display panel.

### Claim 5 (depends on 1)

The electrophoretic display device of claim 1, wherein an edge of the rhombic electrophoretic display panel or the hexagonal electrophoretic display panel is in contact with an edge of another rhombic electrophoretic display panel or another hexagonal electrophoretic display panel.

### Claim 6 (depends on 1)

The electrophoretic display device of claim 1, further comprising:
a texture plate covering the hexagonal electrophoretic display units.

### Claim 7 (depends on 1)

The electrophoretic display device of claim 1, further comprising:
a transparent substrate covering the hexagonal electrophoretic display units.

### Claim 8 (depends on 1)

A method of driving the electrophoretic display device of claim 1, the method comprising:
controlling times for applying driving voltage to the three rhombic electrophoretic display panels or the three rhombic regions to control gray scales of the three rhombic electrophoretic display panels or the three rhombic regions.

### Claim 9 (depends on 8)

The method of claim 8, wherein a ratio of the times for applying the driving voltage to the three rhombic electrophoretic display panels or the three rhombic regions is 0:3-8:24-41 or 3-8:9-21:80-120.

### Claim 10 (depends on 8)

The method of claim 8, wherein the times for applying the driving voltage to the three rhombic electrophoretic display panels or the three rhombic regions are different.