# US 8,570,272 B2 · Electrophoresis display panel

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- Number: US 8,570,272 B2
- Document ID: US8570272B2
- Status: Granted
- Kind: B2
- Application number: 12/753,081
- Filed: 2010-04-01
- Published: 2011-05-05
- Granted: 2013-10-29
- Earliest claimed: 2009-10-29
- Assignees: Au Optronics Corporation
- Applicants: Ming-Che Hsieh; Chih-Wei Chu; Shih-Yu Wang
- Inventors: Ming-Che Hsieh; Chih-Wei Chu; Shih-Yu Wang
- Web page: https://patentgrep.com/patent/US8570272B2

## CPC

- 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 1/167: by electrophoresis
- G02F 1/1679: Gaskets; Spacers; Sealing of cells; Filling or closing of cells
- G02F 2201/52: RGB geometrical arrangements
- G09G 2300/0452: Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
- G09G 2340/06: Colour space transformation
- 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)
- 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

An electrophoresis display panel includes a plurality of first sub-pixels, a plurality of second sub-pixels, a plurality of third sub-pixels, and a plurality of white sub-pixels. The first sub-pixels, the second sub-pixels, and the third sub-pixels are suitable for irradiating different light of three primary colors, respectively, while the white sub-pixels are suitable for irradiating white light. Each of the first sub-pixels does not adjoin the second sub-pixels and the third sub-pixels. Each of the second sub-pixels does not adjoin the third sub-pixels. Each of the first sub-pixels adjoins the white sub-pixels exclusively or adjoins the white sub-pixels and other first sub-pixels exclusively.

## Claims

### Claim 1

An electrophoresis display panel comprising:
a plurality of first sub-pixels, wherein each of the first sub-pixels has a first electrophoretic fluid and electrically-charged white particles doped in the first electrophoretic fluid;
a plurality of second sub-pixels, wherein each of the second sub-pixels has a second electrophoretic fluid and electrically-charged white particles doped in the second electrophoretic fluid;
a plurality of third sub-pixels, wherein each of the third sub-pixels has a third electrophoretic fluid and electrically-charged white particles doped in the third electrophoretic fluid, where the first sub-pixels, the second sub-pixels, and the third sub-pixels are suitable for irradiating different light of three primary colors, respectively; and
a plurality of white sub-pixels suitable for irradiating white light, wherein each of the white sub-pixels has a fourth electrophoretic fluid and electrically-charged white particles doped in the fourth electrophoretic fluid, and each of the first sub-pixels does not adjoin the second sub-pixels and the third sub-pixels, each of the second sub-pixels does not adjoin the third sub-pixels, and each of the first sub-pixels adjoins the white sub-pixels and other first sub-pixels exclusively, and each of the first sub-pixels adjoins two of the white sub-pixels and other two of the first sub-pixels.

### Claim 2 (depends on 1)

The electrophoresis display panel as claimed in claim 1, wherein the first sub-pixels are red sub-pixels, the second sub-pixels are green sub-pixels and the third sub-pixels are blue sub-pixels, and the first electrophoretic fluid is a red electrophoretic fluid, the second electrophoretic fluid is a green electrophoretic fluid, the third electrophoretic fluid is a blue electrophoretic fluid and the fourth electrophoretic fluid is a black electrophoretic fluid.

### Claim 3 (depends on 1)

The electrophoresis display panel as claimed in claim 1, wherein the first sub-pixels are arranged in columns, the second sub-pixels are arranged in columns, the third sub-pixels are arranged in columns, and the white sub-pixels are arranged in columns.

### Claim 4 (depends on 1)

The electrophoresis display panel as claimed in claim 1, wherein the first sub-pixels are arranged in rows, the second sub-pixels are arranged in rows, the third sub-pixels are arranged in rows, and the white sub-pixels are arranged in rows.

### Claim 5

A manufacturing method of an electrophoresis display panel, comprising:
forming a pixel defining layer on a substrate, wherein the pixel defining layer comprises a plurality of micro-cups;
forming a plurality of first sub-pixels, a plurality of second sub-pixels, and a plurality of third sub-pixels in different parts of the micro-cups, wherein the first sub-pixels, the second sub-pixels, and the third sub-pixels are suitable for irradiating different light of three primary colors, respectively, each of the first sub-pixels does not adjoin the second sub-pixels and the third sub-pixels, and each of the second sub-pixels does not adjoin the third sub-pixels; and
forming a plurality of white sub-pixels in the other part of the micro-cups after the first sub-pixels, the second sub-pixels, and the third sub-pixels are formed, wherein each of the first sub-pixels adjoins the white sub-pixels exclusively or adjoins the white sub-pixels and other first sub-pixels exclusively.

### Claim 6 (depends on 5)

The manufacturing method as claimed in claim 5, wherein a method of forming the first sub-pixels, the second sub-pixels, and the third sub-pixels comprises:
filling a part of the micro-cups with a red electrophoretic fluid and electrically-charged white particles doped in the red electrophoretic fluid;
filling another part of the micro-cups with a green electrophoretic fluid and electrically-charged white particles doped in the green electrophoretic fluid;
filling still another part of the micro-cups with a blue electrophoretic fluid and electrically-charged white particles doped in the blue electrophoretic fluid; and
irradiating the red, the green, and the blue electrophoretic fluids by ultraviolet light to form a first curing layer, wherein the first curing layer seals the red, the green, and the blue electrophoretic fluids into the part, the another part, and the still another part of the micro-cups, respectively.

### Claim 7 (depends on 5)

The manufacturing method as claimed in claim 5, wherein a method of forming the white sub-pixels comprises:
filling the other part of the micro-cups with a black electrophoretic fluid and electrically-charged white particles doped in the black electrophoretic fluid; and
irradiating the black electrophoretic fluid by ultraviolet light to form a second curing layer, wherein the second curing layer seals the black electrophoretic fluid into the other part of the micro-cups.

### Claim 8 (depends on 5)

The manufacturing method as claimed in claim 5, wherein the first sub-pixels, the second sub-pixels, and the third sub-pixels are formed simultaneously.