# US 8,786,806 B2 · Pixels having extra-planar fringe field amplifiers for multi-domain vertical alignment liquid crystal displays

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- Number: US 8,786,806 B2
- Document ID: US8786806B2
- Status: Granted
- Kind: B2
- Application number: 13/341,776
- Filed: 2011-12-30
- Published: 2012-04-26
- Granted: 2014-07-22
- Earliest claimed: 2005-09-15
- Assignees: Hiap L. Ong; Kyoritsu Optronics Co., Ltd.
- Applicants: Hiap L. Ong
- Inventors: Hiap L. Ong
- Web page: https://patentgrep.com/patent/US8786806B2

## CPC

- G02F 1/133707: {Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes}
- G09G 3/3614: {Control of polarity reversal in general}
- G02F 1/1393: {the birefringence of the liquid crystal being electrically controlled, e.g. ECB-, DAP-, HAN-, PI-LC cells (G02F1/1396, G02F1/141 take precedence)}
- G02F 2201/123: pixel
- G09G 3/3648: {using an active matrix (G09G3/367 - G09G3/3696 take precedence)}
- G09G 2300/0439: Pixel structures
- G09G 2300/0447: for multi-domain technique to improve the viewing angle in a liquid crystal display, such as multi-vertical alignment [MVA]
- G09G 2300/0452: Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
- G09G 2300/0491: Use of a bi-refringent liquid crystal, optically controlled bi-refringence [OCB] with bend and splay states, or electrically controlled bi-refringence [ECB] for controlling the color
- G09G 2320/0242: Compensation of deficiencies in the appearance of colours
- G09G 2320/028: by changing the viewing angle properties, e.g. widening the viewing angle, adapting the viewing angle to the view direction
- 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

A multi-domain vertical alignment liquid crystal display that does not require physical features on the substrate (such as protrusions and ITO slits) is disclosed. Each pixel of the MVA LCD is subdivided into color components, which are further divided into color dots. Each pixel also contains extra-planar fringe field amplifiers that separate the color dots of a pixel. The voltage polarity of the color dots and extra-planar fringe field amplifiers are arranged so that fringe fields in each color dot causes multiple liquid crystal domains in each color dot. Specifically, the color dots and fringe field amplifying regions of the display are arranged so that neighboring polarized elements have opposite polarities.

## Claims

### Claim 1

A display comprising:
a first pixel comprising
a first first-pixel color component having
a first first-pixel first-component color dot;
a second first-pixel first-component color dot aligned with the first first-pixel first-component color dot in a first dimension;
a third first-pixel first-component color dot aligned with the first first-pixel first-component color dot in a second dimension; and
a fourth first-pixel first-component color dot aligned with the third first-pixel first-component color dot in the first dimension and aligned with the second first-pixel first-component color dot in the second dimension;
a first first-pixel extra-planar fringe field amplifier located between the first first-pixel first-component color dot and the second first-pixel first-component color dot; wherein the first first-pixel first-component color dot lies in a first plane and the first first-pixel extra-planar fringe field amplifier lies in a second plane; and
a first first-pixel switching element coupled to the first first-pixel first-component color dot and the second first-pixel first-component color dot; and a second pixel comprising
a first second-pixel color component having
a first second-pixel first-component color dot; and
a second second-pixel first-component color dot aligned with the first second-pixel first-component color dot in the first dimension;
a first second-pixel extra-planar fringe field amplifier located between the first second-pixel first-component color dot and the second second-pixel first-component color dot; wherein the first second-pixel first-component color dot lies in the first plane and the first second-pixel extra-planar fringe field amplifier lies in the second plane; and
a first second-pixel switching element coupled to the first second-pixel first-component color dot and the second second-pixel first-component color dot; and
wherein the first second-pixel switching element is coupled to the first first-pixel extra-planar fringe field amplifier.

### Claim 2 (depends on 1)

The display of claim 1 wherein the first first-pixel switching element is configured to have a first polarity when the first second-pixel switching element is configured to have a second polarity.

### Claim 3 (depends on 1)

The display of claim 1, further comprising:
a third pixel comprising
a first third-pixel color component having
a first third-pixel first-component color dot; and
a second third-pixel first-component color dot aligned with the first third-pixel first-component color dot in the first dimension;
a first third-pixel extra-planar fringe field amplifier located between the first third-pixel first-component color dot and the second third-pixel first-component color dot; wherein the first third-pixel first-component color dot lies in the first plane and the first third-pixel extra-planar fringe field amplifier lies in the second plane; and
a first third-pixel switching element coupled to the first third-pixel first-component color dot and the second third-pixel first-component color dot; and
wherein the first third-pixel switching element is coupled to the first second-pixel extra-planar fringe field amplifier.

### Claim 4 (depends on 3)

The display of claim 3 wherein the first first-pixel switching element is configured to have a first polarity when the first second-pixel switching element is configured to have a second polarity and wherein the third first-pixel switching element is configured to have the first polarity when the first first-pixel switching element is configured have the first polarity.

### Claim 5 (depends on 1)

The display of claim 1, wherein the first pixel further comprises:
a second first-pixel color component having
a first first-pixel second-component color dot; and
a second first-pixel second-component color dot aligned with the first first-pixel second-component color dot in the first dimension;
a second first-pixel extra-planar fringe field amplifier located between the first first-pixel second-component color dot and the second first-pixel second-component color dot; wherein the first first-pixel second-component color dot lies in the first plane and the second first-pixel extra-planar fringe field amplifier lies in the second plane; and
a second first-pixel switching element coupled to the first first-pixel second-component color dot and the second first-pixel second-component color dot.

### Claim 6 (depends on 5)

The display of claim 5, wherein the first pixel further comprises:
a third first-pixel color component having
a first first-pixel third-component color dot; and
a second first-pixel third-component color dot aligned with the first first-pixel third-component color dot in the first dimension;
a third first-pixel extra-planar fringe field amplifier located between the first first-pixel third-component color dot and the second first-pixel third-component color dot; wherein the first first-pixel third-component color dot lies in the first plane and the third first-pixel extra-planar fringe field amplifier lies in the second plane; and
a third first-pixel switching element coupled to the first first-pixel third-component color dot and the second first-pixel third-component color dot.

### Claim 7 (depends on 5)

The display of claim 5, further comprising a third first-pixel extra-planar fringe field amplifier located, between the first first-pixel color component and the second first-pixel color component, wherein the third first-pixel extra-planar fringe field amplifier lies in the second plane; and wherein the first second-pixel switching element is coupled to the third first-pixel extra-planar fringe field amplifier.

### Claim 8 (depends on 7)

The display of claim 7 wherein the first first-pixel switching element is configured to have a first polarity when the first second-pixel switching element is configured to have a second polarity and wherein the second first-pixel switching element is configured to have the first polarity when the first first-pixel switching element is configured to have the first polarity.

### Claim 9 (depends on 5)

The display of claim 5, wherein the second pixel further comprises:
a second second-pixel color component having
a first second-pixel second-component color dot; and
a second second-pixel second-component color dot aligned with the first second-pixel second-component color dot in the first dimension;
a second second-pixel extra-planar fringe field amplifier located between the first second-pixel second-component color dot and the second second-pixel second-component color dot; wherein the first second-pixel second-component color dot lies in the first plane and the second second-pixel extra-planar fringe field amplifier lies in the second plane; and
a second second-pixel switching element coupled to the first second-pixel second-component color dot, the second second-pixel second-component color dot; and the second first-pixel extra-planar fringe field amplifier.

### Claim 10 (depends on 5)

The display of claim 5, wherein the first pixel further comprises:
a first first-pixel associated dot; and
a second first-pixel associated dot; wherein the first first-pixel color component lies between the first first-pixel associated dot and the second first-pixel associated dot.

### Claim 11 (depends on 10)

The display of claim 10, wherein the first pixel further comprises:
a third first-pixel associated dot; and
a fourth first-pixel associated dot; wherein the second first-pixel color component lies between the third first-pixel associated dot and the fourth first-pixel associated dot and wherein the third first-pixel associated dot lies between the second first-pixel associated dot and the second first-pixel color component.

### Claim 12 (depends on 1)

The display of claim 1, wherein the first first-pixel extra-planar fringe field amplifier further comprises:
a first-pixel first-component vertical amplifying portion extending between the first first-pixel first-component color dot and the second first-pixel first-component color dot and between the third first-pixel first-component color dot and the fourth first-pixel first-component color dot;
a first first-pixel first-component horizontal amplifying portion extending between the first first pixel first-component color dot and the third first-pixel first-component color dot; and
a second first-pixel first-component horizontal amplifying portion extending between the second first-pixel first-component color dot and the fourth first-pixel first-component color dot.

### Claim 13 (depends on 12)

The display of claim 12, wherein the first second-pixel color component further comprises:
a third second-pixel first-component color dot aligned with the first second-pixel first-component color dot in a second dimension; and
a fourth second-pixel first-component color dot aligned with the third second-pixel first-component color dot in the first dimension and aligned with the second second-pixel first-component color dot in the second dimension.

### Claim 14 (depends on 13)

The display of claim 13, wherein the first second-pixel extra-planar fringe field amplifier further comprises:
a second-pixel first-component vertical amplifying portion extending between the first second-pixel first-component color dot and the second second-pixel first-component color dot and between the third second-pixel first-component color dot and the fourth second-pixel first-component color dot;
a first second-pixel first-component horizontal amplifying portion extending between the first first pixel first-component color dot and the third second-pixel first-component color dot; and
a second second-pixel first-component horizontal amplifying portion extending between the second second-pixel first-component color dot and the fourth second-pixel first-component color dot.

### Claim 15 (depends on 12)

The display of claim 12,
wherein the first first-pixel color component further comprises:
a fifth first-pixel first-component color dot aligned with the third first-pixel first-component color dot in the second dimension;
a sixth first-pixel first-component color dot aligned with the fifth first-pixel first-component color dot aligned in the first dimension and aligned with the fourth first-pixel first-component color dot in the second dimension; and
wherein the first first-pixel extra-planar fringe field amplifier further comprises:
a third first-pixel first-component horizontal amplifying portion extending between the fifth first-pixel first-component color dot and the third first-pixel first-component color dot; and
a fourth first-pixel first-component horizontal amplifying portion extending between the sixth first-pixel first-component color dot and the fourth first-pixel first-component color dot; and
wherein the first-pixel first-component vertical amplifying portion extends between the fifth first-pixel first-component color dot and the sixth first-pixel first-component color dot.

### Claim 16 (depends on 15)

The display of claim 15,
wherein the first first-pixel color component further comprises:
a seventh first-pixel first-component color dot aligned with the fifth first-pixel first-component color dot in the second dimension;
an eighth first-pixel first-component color dot aligned with the seventh first-pixel first-component color dot in the first dimension in the first dimension and aligned with the sixth first-pixel first-component color dot in the second dimension; and
wherein the first first-pixel extra-planar fringe field amplifier further comprises:
a fifth first-pixel first-component horizontal amplifying portion extending between the fifth first-pixel first-component color dot and the seventh first-pixel first-component color dot; and
a sixth first-pixel first-component horizontal amplifying portion extending between the sixth first-pixel first-component color dot and the eighth first-pixel first-component color dot; and
wherein the first-pixel first-component vertical amplifying portion extends between the seventh first-pixel first-component color dot and the eighth first-pixel first-component color dot.

### Claim 17 (depends on 12)

The display of claim 12, wherein the first pixel further comprises:
a second first-pixel color component having
a first first-pixel second-component color dot; and
a second first-pixel second-component color dot aligned with the first first-pixel second-component color dot in the first dimension;
a third first-pixel second-component color dot aligned with the first'first-pixel second-component color dot in the second dimension; and
a fourth first-pixel second-component color dot aligned with the third first-pixel second-component color dot in the first dimension and aligned with the second first-pixel second-component color dot in the second dimension; and
a second first-pixel extra-planar fringe field amplifier having
a first-pixel second-component vertical amplifying portion extending between the first first-pixel second-component color dot and the second first-pixel second-component color dot and between the third first-pixel second-component color dot and the fourth first-pixel second-component color dot;
a first first-pixel second-component horizontal amplifying portion extending between the first first-pixel second-component color dot and the third first-pixel second-component color dot; and
a second first-pixel second-component horizontal amplifying portion extending between the second first-pixel second-component color dot and the fourth first-pixel second-component color dot.

### Claim 18 (depends on 17)

The display of claim 17, further comprising:
a second first-pixel switching element coupled to the second first-pixel color component; and
wherein the first first-pixel switching element is configured to have a first polarity when the second first-pixel switching element is configured to have a second polarity.

### Claim 19 (depends on 17)

The display of claim 17, wherein the first pixel further comprises:
a third first-pixel color component having
a first first-pixel third-component color dot; and
a second first-pixel third-component color dot aligned with the first first-pixel third-component color dot in the first dimension;
a third first-pixel third-component color dot aligned with the first first-pixel third-component color dot in the second dimension; and
a fourth first-pixel third-component color dot aligned with the third first-pixel third-component color dot in the first dimension and aligned with the second first-pixel third-component color dot in the second dimension; and
a third first-pixel extra-planar fringe field amplifier having
a first-pixel third-component vertical amplifying portion extending between the first first-pixel third-component color dot and the second first-pixel third-component color dot and between the third first-pixel third-component color dot and the fourth first-pixel third-component color dot;
a first first-pixel third-component horizontal amplifying portion extending between the first first-pixel third-component color dot and the third first-pixel third-component color dot; and
a second first-pixel third-component horizontal amplifying portion extending between the second first-pixel third-component color dot and the fourth first-pixel third-component color dot.

### Claim 20 (depends on 19)

The display of claim 19,
a second first-pixel switching element coupled to the second first-pixel color component;
a third first-pixel switching element coupled to the third first-pixel color component; and
wherein the first first-pixel switching element and third first-pixel switching element are configured to have a first polarity when the second first-pixel switching element is configured to have a second polarity.