# US 2014/0152934 A1 · Liquid crystal display

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- Number: US 2014/0152934 A1
- Document ID: US20140152934A1
- Status: Published application
- Kind: A1
- Application number: 13/837,114
- Filed: 2013-03-15
- Published: 2014-06-05
- Earliest claimed: 2012-11-30
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Soo Jeong Huh; Dong Wook Kim; Seung Hyun Park
- Web page: https://patentgrep.com/patent/US20140152934A1

## CPC

- G02F 1/134309: {characterised by their geometrical arrangement}
- G02F 1/133345: {Insulating layers (G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence)}
- G02F 1/13338: {Input devices, e.g. touch panels}
- G02F 1/133514: {Colour filters}
- G02F 1/133707: {Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes}
- G02F 1/133784: {by rubbing}
- G02F 1/134363: {for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]}
- G02F 1/13439: {characterised by their electrical, optical, physical properties; materials therefor; method of making}
- G02F 1/136227: {Through-hole connection of the pixel electrode to the active element through an insulation layer}
- G02F 1/136286: {Wiring, e.g. gate line, drain line}
- G02F 1/1368: in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)}
- G06F 3/0412: {Digitisers structurally integrated in a display}
- G02F 1/134372: {for fringe field switching [FFS] where the common electrode is not patterned}
- G02F 2201/121: common or background
- G02F 2201/123: pixel
- 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
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)

## Abstract

A liquid crystal display includes a first substrate facing a second substrate, a liquid crystal layer disposed between the first substrate and the second substrate, a first field generating electrode on the first substrate, and a second field generating electrode on the first substrate and including a plurality of branch electrodes overlapped with the first field generating electrode. The second field generating electrode includes a wing connected to an end of a first branch electrode positioned at an outermost side the plurality of branch electrodes.

## Claims

### Claim 1

A liquid crystal display, comprising:
a first substrate;
a second substrate facing the first substrate;
a liquid crystal layer disposed between the first substrate and the second substrate;
a first electrode on the first substrate; and
a second electrode on the first substrate and comprising a plurality of branch electrodes overlapped with the first electrode,
wherein the second electrode comprises a wing connected to an end of a first branch electrode disposed at one end of the plurality of branch electrodes.

### Claim 2 (depends on 1)

The liquid crystal display of claim 1, wherein:
a first length between a side of a slit closest to the wing and a side of the wing is equal to or larger than a value equivalent to adding about 1.5 μm to a width of one of the plurality of branch electrodes, the slit being formed between two of the plurality of branch electrodes.

### Claim 3 (depends on 2)

The liquid crystal display of claim 2, wherein:
the second electrode further comprises a connection part to connect ends of the plurality of branch electrodes; and
the first length is larger than a value equivalent to adding about 2 μm to a width of the connection part.

### Claim 4 (depends on 3)

The liquid crystal display of claim 3, wherein:
the slit is inclined toward a first side of the plurality of branch electrodes with respect to a first direction and forms an oblique angle with the first direction;
liquid crystal molecules in the liquid crystal layer are configured to be aligned in the first direction for at least a determined period of time; and
the first branch electrode is configured to be connected to the wing at the one end corresponding to an end of the first side.

### Claim 5 (depends on 4)

The liquid crystal display of claim 4, wherein:
a length of the slit in the first direction is at least about 40 μm; and
a value equivalent to multiplying the width of the connection part by the length of the slit in the first direction is at least about 90.

### Claim 6 (depends on 5)

The liquid crystal display of claim 5, further comprising:
a thin film transistor on the first substrate to transfer a data voltage to the second electrode; and
an insulating layer disposed between the first electrode and the second electrode,
wherein the second electrode is disposed on the first electrode,
wherein the insulating layer comprises a contact hole to connect the second electrode and the thin film transistor,
wherein the first electrode comprises a hole surrounding the contact hole, and
wherein a distance from a bottom of the slit to a first side of the hole closest to a bottom of the slit is at most about 10 μm.

### Claim 7 (depends on 6)

The liquid crystal display of claim 6, wherein:
a distance from an edge of a first side of the second electrode to a second side of the hole closest to the edge of the first side of the second electrode is at most about 10 μm.

### Claim 8 (depends on 4)

The liquid crystal display of claim 4, wherein:
the slit comprises a main area forming a first angle with the first direction and an edge area forming a second angle with the first direction, the second angle being larger than the first angle, the edge area being smaller than the main area;
a length of the slit in the first direction of the main area is at least about 40 μm; and
a value equivalent to multiplying the width of the connection part by the length of the slit in the first direction of the main area is at least about 90.

### Claim 9 (depends on 8)

The liquid crystal display of claim 8, further comprising:
a thin film transistor on the first substrate to transfer a data voltage to the second electrode, and an insulating layer disposed between the first electrode and the second electrode,
wherein the second electrode is disposed on the first electrode,
wherein the insulating layer comprises a contact hole to connect the second electrode and the thin film transistor,
wherein the first electrode comprises a hole surrounding the contact hole, and
wherein a distance from a curved point between the main area and the edge area of the slit to a first side of the hole closest to the curved point is at most 10 μm.

### Claim 10 (depends on 9)

The liquid crystal display of claim 9, wherein:
a distance from an edge of the first side of the second electrode to a second side of the hole closest to the edge is at most about 10 μm.

### Claim 11 (depends on 1)

The liquid crystal display of claim 1, wherein:
the second electrode further comprises a connection part to connect ends of the plurality of branch electrodes; and
a width of the connection part is larger than a width of the branch electrode.

### Claim 12

A liquid crystal display, comprising:
a first substrate;
a second substrate facing the first substrate;
a liquid crystal layer disposed between the first substrate and the second substrate;
a first electrode on the first substrate; and
a second electrode on the first substrate and comprising a plurality of branch electrodes overlapped with the first electrode,
wherein liquid crystal molecules in the liquid crystal layer are configured to be aligned in a first direction for at least a determined period of time,
wherein the second electrode further comprises a connection part to connect ends of the plurality of branch electrodes,
wherein a length of a slit in the first direction is at least about 40 μm, the slit being formed between two of the plurality of branch electrodes, and
wherein a value equivalent to multiplying a width of the connection part by the length of the slit is at least about 90.

### Claim 13 (depends on 12)

The liquid crystal display of claim 12, wherein:
the second electrode comprises a wing connected to an end of a first branch electrode disposed at one end of the plurality of branch electrodes.

### Claim 14 (depends on 13)

The liquid crystal display of claim 13, wherein:
a first length between a side of the slit closest to the wing and a side of the wing is equal to or larger than a value equivalent to adding about 2 μm to a width of the connection part.

### Claim 15 (depends on 14)

The liquid crystal display of claim 14, wherein:
the slit is inclined toward a first side of the plurality of branch electrodes with respect to the first direction and forms an oblique angle with the first direction; and
the first branch electrode is configured to be connected to the wing at an the one end corresponding to an end of the first side.

### Claim 16 (depends on 15)

The liquid crystal display of claim 15, further comprising:
a thin film transistor on the first substrate to transfer a data voltage to the second electrode; and
an insulating layer disposed between the first electrode and the second electrode,
wherein the second electrode is disposed on the first electrode,
wherein the insulating layer comprises a contact hole to connect the second electrode and the thin film transistor,
wherein the first electrode comprises a hole surrounding the contact hole, and
wherein a distance from a bottom of the slit to a first side of the hole closest to a bottom of the slit is at most about 10 μm.

### Claim 17 (depends on 16)

The liquid crystal display of claim 16, wherein:
a distance from an edge of a first side of the second electrode to a second side of the hole closest to the edge of the first side of the second electrode is at most about 10 μm.

### Claim 18 (depends on 15)

The liquid crystal display of claim 15, wherein:
the slit comprises a main area forming a first angle with the first direction and an edge area forming a second angle with the first direction, the second angle being larger than the first angle, the edge area being smaller than the main area;
a length of the slit in the first direction of the main area is at least about 40 μm; and
a value equivalent to multiplying the width of the connection part by the length of the slit in the first direction of the main area is at least about 90.

### Claim 19 (depends on 18)

The liquid crystal display of claim 18, further comprising:
a thin film transistor disposed on the first substrate to transfer a data voltage to the second electrode; and
an insulating layer disposed between the first electrode and the second electrode,
wherein the second electrode is disposed on the first electrode,
wherein the insulating layer comprises a contact hole to connect the second electrode and the thin film transistor,
wherein the first electrode comprises a hole surrounding the contact hole, and
wherein a distance from a curved point between the main area and the edge area of the slit to a first side of the hole closest to the curved point is at most about 10 μm.

### Claim 20 (depends on 12)

The liquid crystal display of claim 12, wherein:
a width of the connection part is larger than a width of the branch electrode.

### Claim 21

A liquid crystal display, comprising:
a first substrate;
a second substrate facing the first substrate;
a liquid crystal layer disposed between the first substrate and the second substrate;
a first electrode on the first substrate;
a second electrode on the first substrate and comprising a plurality of branch electrodes overlapped with the first electrode;
a thin film transistor on the first substrate to transfer a data voltage to the second electrode; and
an insulating layer disposed between the first electrode and the second electrode and comprising a contact hole to connect the second electrode and the thin film transistor,
wherein the second electrode is disposed on the first electrode,
wherein the first electrode comprises a hole surrounding the contact hole,
wherein a slit between the plurality of branch electrodes is inclined towards a first side of the plurality of branch electrodes with respect to a first direction and forms an oblique angle with the first direction,
wherein liquid crystal molecules in the liquid crystal layer are configured to be aligned in the first direction for at least a determined period of time, and
wherein a distance from a bottom of the slit to a first side of the hole closest to a bottom of the slit is at most 10 μm.

### Claim 22 (depends on 21)

The liquid crystal display of claim 21, wherein:
the second field generating electrode comprises a wing connected to an end of a first branch electrode disposed at one end of the plurality of branch electrodes.

### Claim 23 (depends on 22)

The liquid crystal display of claim 22, wherein:
a first length between a side of the slit closest to the wing and a side of the wing is equal to or larger than a value equivalent to adding about 1.5 μm to a width of one of the plurality of branch electrodes.

### Claim 24 (depends on 23)

The liquid crystal display of claim 23, wherein:
the second electrode further comprises a connection part to connect ends of the plurality of branch electrodes; and
the first length is larger than a value equivalent to adding about 2 μm to a width of the connection part.

### Claim 25 (depends on 24)

The liquid crystal display of claim 24, wherein:
the first branch electrode is configured to be connected with the wing at an end of the first side of the plurality of branch electrodes.

### Claim 26 (depends on 25)

The liquid crystal display of claim 25, wherein:
a length of the slit in the first direction is at least about 40 μm; and
a value equivalent to multiplying the width of the connection part by a length of the slit in the first direction is at least about 90.

### Claim 27 (depends on 26)

The liquid crystal display of claim 26, wherein:
a distance from an edge side at a first side of the second electrode to a second side of the hole closest to the edge side at the first side of the second electrode is at most about 10 μm.

### Claim 28 (depends on 21)

The liquid crystal display of claim 21, wherein:
the slit comprises a main area forming a first angle with the first direction and an edge area forming a second angle with the first direction, the second angle being larger than the first angle, the edge area being smaller than the main area;
a length of the slit in the first direction of the main area is at least about 40 μm; and
a value equivalent to multiplying the width of the connection part by the length of the slit in the first direction of the main area is at least about 90 μm.

### Claim 29 (depends on 28)

The liquid crystal display of claim 28, wherein:
a distance from a curved point between the main area and the edge area of the slit to a first side of the hole closest to the curved point is at most about 10 μm.

### Claim 30 (depends on 21)

The liquid crystal display of claim 21, wherein:
a distance from an edge of the first side of the second electrode to a second side of the hole closest to the edge of the first side of the second electrode is at most about 10 μm.