# US 10,371,987 B2 · Liquid crystal display

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- Number: US 10,371,987 B2
- Document ID: US10371987B2
- Status: Granted
- Kind: B2
- Application number: 15/069,122
- Filed: 2016-03-14
- Published: 2016-12-29
- Granted: 2019-08-06
- Earliest claimed: 2015-06-26
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Jeong Man Son; Min Wook Park; Deok Ho Kang; Dong Hee Ye; Jin Young Lee
- Web page: https://patentgrep.com/patent/US10371987B2

## CPC

- G02F 1/133707: {Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes}
- G02F 1/133776: {having structures locally influencing the alignment, e.g. unevenness}
- 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 includes a first panel which includes a first electrode including a first protrusion and a first alignment layer disposed on the first electrode, a second panel which is disposed to face the first panel, and which includes a second electrode including a second protrusion disposed in a region corresponding to the first protrusion and a second alignment layer disposed on the second electrode, and a liquid crystal layer which is disposed between the first panel and the second panel, where the first protrusion and the second protrusion vertically face each other.

## Claims

### Claim 1

A liquid crystal display comprising:
a first panel which includes a first electrode including a first protrusion and a first alignment layer disposed on the first electrode;
a second panel which is disposed to face the first panel, and which includes a second electrode including a second protrusion disposed in a region corresponding to the first protrusion and a second alignment layer disposed on the second electrode; and
a liquid crystal layer which is disposed between the first panel and the second panel,
wherein the first protrusion extends in a first direction,
wherein the second protrusion extends in a second direction crossing the first direction,
wherein each pixel of a plurality of pixels defined between the first and second panels has a single first protrusion of the first electrode and a single second protrusion of the second electrode, and
wherein the first protrusion and the second protrusion cross each other in a plan view.

### Claim 2 (depends on 1)

The liquid crystal display of claim 1, wherein each of the first alignment layer and the second alignment layer is a vertical alignment layer including polyimide.

### Claim 3 (depends on 1)

The liquid crystal display of claim 1, wherein the first panel and the second panel are attached to each other to provide a plurality of pixels, and each of the plurality of pixels is provided with the first protrusion and the second protrusion.

### Claim 4 (depends on 3)

The liquid crystal display of claim 3, wherein the first protrusion and the second protrusion provided in each of the plurality of pixels are diagonally inclined at predetermined angles, and the predetermined angles are different from each other for each of the plurality of pixels.

### Claim 5 (depends on 1)

The liquid crystal display of claim 1, wherein the first protrusion comprises:
a first inclination which is diagonally inclined upward in one direction;
a second inclination which is diagonally inclined downward in the other direction; and
a first ridge which is disposed between the first inclination and the second inclination,
wherein the first ridge is located at a center of the first electrode.

### Claim 6 (depends on 5)

The liquid crystal display of claim 5, wherein the second protrusion comprises:
a third inclination which is diagonally inclined upward in one direction;
a fourth inclination which is diagonally inclined downward in the other direction; and
a second ridge which is disposed between the third inclination and the fourth inclination,
wherein the second ridge faces the first ridge, and the second ridge extends in the second direction,
wherein the second direction is perpendicular to the first direction.

### Claim 7 (depends on 1)

The liquid crystal display of claim 1, wherein the first protrusion comprises:
a first inclination which is diagonally inclined downward in one direction;
a second inclination which is diagonally inclined upward in the other direction; and
a first valley which is disposed between the first inclination and the second inclination,
wherein the first valley is located at a center of the first electrode.

### Claim 8 (depends on 7)

The liquid crystal display of claim 7, wherein the second protrusion comprises:
a third inclination which is diagonally inclined upward in one direction;
a fourth inclination which is diagonally inclined downward in the other direction; and
a second ridge which is disposed between the third inclination and the fourth inclination,
wherein the second ridge faces the first valley, and the second ridge extends in the second direction,
wherein the the second direction is perpendicular to the first direction.

### Claim 9 (depends on 7)

The liquid crystal display of claim 7, wherein the second protrusion comprises:
a third inclination which is diagonally inclined downward in one direction;
a fourth inclination which is diagonally inclined upward in the other direction; and
a second valley which is disposed between the third inclination and the fourth inclination,
wherein the second valley faces the first valley, and the second valley extends in the second direction,
wherein the second direction is perpendicular to the first direction.

### Claim 10

A liquid crystal display, comprising:
a first insulating substrate;
a switching element which is disposed on the first insulating substrate;
a protective layer which is disposed on the switching element and which includes a first ridge, a first valley, and a first inclination diagonally inclined between the first ridge and the first valley;
a pixel electrode which is disposed on the protective layer;
a first alignment layer which is disposed on the pixel electrode;
a second insulating substrate which is disposed to face the first insulating substrate;
a color filter which is disposed on the second insulating substrate;
an overcoating layer which is disposed on the color filter and which includes a second ridge, a second valley, and a second inclination diagonally inclined between the second ridge and the second valley;
a common electrode which is disposed on the overcoating layer; and
a second alignment layer which is disposed on the common electrode,
wherein the first ridge and the first valley are disposed to correspond to the second ridge or the second valley,
wherein the first ridge and the first valley extend in a first direction,
wherein the second ridge or the second valley extends in a second direction crossing the first direction,
wherein each pixel of a plurality of pixels defined between the first and second panels has a single first protrusion of the first electrode and a single second protrusion of the second electrode, and
wherein the first protrusion and the second protrusion cross each other in a plan view.

### Claim 11 (depends on 10)

The liquid crystal display of claim 10, wherein each of the first alignment layer and the second alignment layer is a vertical alignment layer including polyimide.

### Claim 12 (depends on 10)

The liquid crystal display of claim 10, wherein the first ridge is disposed to correspond to a center of the pixel electrode.

### Claim 13 (depends on 12)

The liquid crystal display of claim 12, wherein the second ridge is disposed to correspond to the first ridge.

### Claim 14 (depends on 13)

The liquid crystal display of claim 13, wherein the switching element is disposed to correspond to the first ridge.

### Claim 15 (depends on 13)

The liquid crystal display of claim 13, wherein a light blocking pattern is further disposed between the second insulating substrate and the color filter, and the light blocking pattern is disposed to correspond to the second valley.

### Claim 16 (depends on 10)

The liquid crystal display of claim 10, wherein the first valley is disposed to correspond to a center of the pixel electrode.

### Claim 17 (depends on 16)

The liquid crystal display of claim 16, wherein the second valley is disposed to correspond to the first valley.

### Claim 18 (depends on 17)

The liquid crystal display of claim 17, wherein the switching element is disposed to correspond to the first ridge.

### Claim 19 (depends on 17)

The liquid crystal display of claim 17, wherein a light blocking pattern is further disposed between the second insulating substrate and the color filter, and the light blocking pattern is disposed to correspond to the second ridge.

### Claim 20 (depends on 16)

The liquid crystal display of claim 16, wherein the second ridge is disposed to correspond to the first valley.