# US 10,371,990 B2 · Liquid crystal display device

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- Number: US 10,371,990 B2
- Document ID: US10371990B2
- Status: Granted
- Kind: B2
- Application number: 15/693,716
- Filed: 2017-09-01
- Published: 2017-12-21
- Granted: 2019-08-06
- Earliest claimed: 2009-07-08
- Assignees: Japan Display Inc.; Panasonic Liquid Crystal Display Co., Ltd.
- Applicants: Japan Display Inc.; Panasonic Liquid Crystal Display Co., Ltd.
- Inventors: Takashi Yamamoto; Tomoya Sugano; Takamitsu Kamada
- Web page: https://patentgrep.com/patent/US10371990B2

## CPC

- G02F 1/13394: {spacers regularly patterned on the cell subtrate, e.g. walls, pillars (G02F1/133377 takes precedence)}
- G02F 1/133514: {Colour filters}
- G02F 1/1337: Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
- G02F 1/1339: Gaskets; Spacers; Sealing of cells
- G02F 1/13452: {Conductors connecting driver circuitry and terminals of panels}
- G02F 1/136286: {Wiring, e.g. gate line, drain line}
- G02F 1/133388: {with constructional differences between the display region and the peripheral region}
- G02F 1/13396: {Spacers having different sizes}
- 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 TFT substrate having a display region where pixels each having a TFT and a pixel electrode are formed in a matrix, a counter substrate having a display region where color filters of three colors are formed in a matrix, the TFT substrate and the counter substrate being bonded together with a sealing material in a seal portion at a periphery, and liquid crystal sealed between the TFT substrate and the counter substrate by the seal material. In the display region, a first insulation film, a first alignment film, a first columnar spacer, an overcoat film, a first color filter among the color filters of three colors are stacked in this order between the TFT substrate and the counter substrate.

## Claims

### Claim 1

A display device comprising:
a TFT substrate including a plurality of pixels each having a TFT and a pixel electrode;
a counter substrate on which a plurality of color filters are formed;
a sealing material bonding the TFT substrate and the counter substrate;
a plurality of first protrusions formed inside of a display region in which the color filters are formed in plan view;
a plurality of second protrusions formed outside of the display region and formed on the counter substrate; and
a third protrusion formed outside of the display region and formed on the counter substrate,
wherein
one of the color filters is located between one of the second protrusions and the counter substrate,
none of the plurality of color filters are provided between the third protrusion and the counter substrate,
an interval between the plurality of second protrusions is longer than an interval between the plurality of first protrusions,
the plurality of second protrusions and the third protrusion are surrounded by the sealing material in plan view, and
the sealing material is between the third protrusion and the TFT substrate.

### Claim 2 (depends on 1)

The display device according to claim 1, wherein an arrangement density of the plurality of second protrusions is lower than an arrangement density of the plurality of first protrusions.

### Claim 3 (depends on 1)

The display device according to claim 1, wherein, in outside of the display region, each of the plurality of color filters is shaped of island shape.

### Claim 4 (depends on 1)

The display device according to claim 1,
wherein the third protrusion extends along extending direction of the sealing material.

### Claim 5 (depends on 4)

The display device according to claim 4, wherein the third protrusion is located inside of one of the second protrusions in plan view.

### Claim 6 (depends on 1)

The display device according to claim 1, wherein
a liquid crystal is sealed between the TFT substrate and the counter substrate, and
an alignment film is formed between the counter substrate and the liquid crystal.

### Claim 7 (depends on 1)

The display device according to claim 1, wherein a gap between the TFT substrate and the counter substrate outside the display region is greater than a gap between the TFT substrate and the counter substrate in the display region.

### Claim 8 (depends on 1)

The display device according to claim 1, wherein at least two of the plurality of color filters, which are provided between one of the second protrusions and the counter substrate, are different color filters.

### Claim 9 (depends on 1)

The display device according to claim 1, wherein the first region is light transparent region.

### Claim 10 (depends on 1)

The display device according to claim 1, a plurality of the color filters is located in the first region.