# US 10,871,692 B2 · Liquid crystal display device, manufacturing method of the same and electronic equipment

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- Number: US 10,871,692 B2
- Document ID: US10871692B2
- Status: Granted
- Kind: B2
- Application number: 16/885,453
- Filed: 2020-05-28
- Published: 2020-09-17
- Granted: 2020-12-22
- Earliest claimed: 2012-03-12
- Assignees: Japan Display Inc.
- Applicants: Japan Display Inc.
- Inventors: Daisuke Ito; Hideyuki Omori
- Web page: https://patentgrep.com/patent/US10871692B2

## CPC

- G02F 1/136286: {Wiring, e.g. gate line, drain line}
- 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 1/134372: {for fringe field switching [FFS] where the common electrode is not patterned}
- G02F 2201/52: RGB geometrical arrangements
- 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 liquid crystal display device includes: a plurality of scan lines and signal lines on one of a pair of substrates arranged to be opposed to each other with a liquid crystal layer sandwiched therebetween, the scan lines and signal lines extending in different directions; and an orientation film, pixel electrode, insulating layer and common electrode, the orientation film being rubbed in a rubbing direction having a given inclination with respect to a pixel arrangement direction. The pixel electrode is partitioned by the scan lines and signal lines and has subpixels made up of first and second regions. The first region has a plurality of slit-shaped openings having a given inclination in a first direction with respect to the rubbing direction. The second region has a plurality of slit-shaped openings having a given inclination in a second direction with respect to the rubbing direction.

## Claims

### Claim 1

A display device comprising:
a pair of substrates arranged opposed to each other;
a plurality of scan lines arranged in parallel to each other on one of the pair of substrates, the scan lines including a first scan line, a second scan line, and a third scan line;
a plurality of signal lines including
a first signal line intersecting the first scan line and the second scan line,
a second signal line connected to the first signal line,
a third signal line intersecting the first scan line and the second scan line, and
a fourth signal line connected to the third signal line;
a plurality of partitioned portions including
a first pixel partitioned by the first scan line, the second scan line, the first signal line, and the third signal line and
a second pixel partitioned by the second scan line, the third scan line, the second signal line, and the fourth signal line, the second pixel being adjacent to the first pixel; and
a plurality of electrodes including
a first electrode that is disposed in the first pixel and that has a first slit and
a second electrode that is disposed in the second pixel and that has a second slit, wherein
the first slit extends in a first direction and has first slit ends that are both ends of the first slit, the first slit ends each extending in a first end direction different from the first direction,
the second slit extends in a second direction and has second slit ends that are both ends of the second slit, the second slit ends each extending in a second end direction different from the second direction, and
the second scan line is disposed between the first slit ends each extending in the first end direction and the second slit ends each extending in the second end direction that is different from the first end direction.

### Claim 2 (depends on 1)

The display device according to claim 1, further comprising;
a first polarizing plate with a first transmission axis, on one of the pair of substrates; and
a second polarizing plate with a second transmission axis orthogonal to the first transmission axis, on the other one of the pair of substrates, wherein
the first direction of the first electrode and the second direction of the second electrode incline by an identical angle with respect to the first transmission axis while being oriented in counter directions.

### Claim 3 (depends on 1)

The display device according to claim 1, wherein the first slit ends of the first pixel and the second slit ends of the second pixel overlap a black matrix in a planar view.

### Claim 4 (depends on 1)

The display device according to claim 1, wherein each of the signal lines includes:
a first portion routed along one side of the first pixel,
a second portion routed along one side of the second pixel, and
a third portion adapted to connect, in a crank form, the first and second portions.

### Claim 5 (depends on 4)

The display device according to claim 4, wherein each of the signal lines further includes:
a fourth portion adapted to connect, in a crank form,
the second portion of one of the partitioned portions and
the first portion of another one of the partitioned portions adjacent to the one of the partitioned portions.

### Claim 6 (depends on 1)

The display device according to claim 1, wherein an aperture ratio of the first pixel is the same as that of the second pixel.

### Claim 7

A display device comprising:
a pair of substrates arranged opposed to each other;
a plurality of scan lines arranged in parallel to each other on one of the pair of substrates, the scan lines including a first scan line, a second scan line, and a third scan line;
a plurality of signal lines including
a first signal line intersecting the first scan line and the second scan line,
a second signal line connected to the first signal line,
a third signal line intersecting the first scan line and the second scan line, and
a fourth signal line connected to the third signal line;
a plurality of partitioned portions including
a first pixel partitioned by the first scan line, the second scan line, the first signal line, and the third signal line and
a second pixel partitioned by the second scan line, the third scan line, the second signal line, and the fourth signal line, the second pixel being adjacent to the first pixel; and
a plurality of electrodes including
a first electrode that is disposed in the first pixel and that has a first slit and
a second electrode that is disposed in the second pixel and that has a second slit,
wherein
the first slit extends in a first direction and has first slit ends that are both ends of the first slit, the first slit ends each extending in a first end direction different from the first direction,
the second slit extends in a second direction and has second slit ends that are both ends of the second slit, the second slit ends each extending in a second end direction different from the second direction,
a first end length is a length of each of the first slit ends of the first slits in the first pixel, in a fourth direction perpendicular to a direction in which each of the scan lines extends,
a second end length is a length of each of the second slit ends of the second slits in the second pixel, in the fourth direction, and
the first end length is different from the second end length.

### Claim 8 (depends on 7)

The display device according to claim 7, wherein
the first electrode include a plurality of the first slits,
the second electrode include a plurality of the second slits,
the partitioned portions include a plurality of the first pixels and a plurality of the second pixels,
at least two first slits in each of the first pixels have an identical length, and
at least two second slits in each of the second pixels have an identical length.

### Claim 9 (depends on 8)

The display device according to claim 8, wherein
all of the first slits in each of the first pixels have an identical length, and
all of the second slits in each of the first pixels have an identical length.

### Claim 10 (depends on 7)

The display device according to claim 7, wherein
the first slit further includes a first slit body that are other than the first slit ends and that extends in the first direction,
the second slit further includes a second slit body that are other than the second slit ends and that extends in the second direction,
the first electrode include a plurality of the first slits,
the second electrode include a plurality of the second slits,
the partitioned portions include a plurality of the first pixels and a plurality of the second pixels,
at least two first slit bodies in each of the first pixels have an identical length, and
at least two second slit bodies in each of the second first pixels have an identical length.

### Claim 11 (depends on 10)

The display device according to claim 10, wherein
all of the first slit bodies in each of first pixels have an identical length, and
all of the second slit bodies in each of the second pixels have an identical length.