# US 12,111,544 B2 · Liquid crystal display device

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- Number: US 12,111,544 B2
- Document ID: US12111544B2
- Status: Granted
- Kind: B2
- Application number: 18/141,521
- Filed: 2023-05-01
- Published: 2023-08-24
- Granted: 2024-10-08
- Earliest claimed: 2009-07-08
- Assignees: Japan Display Inc.; Panasonic Intellectual Property Corporation of America
- Applicants: Japan Display Inc.; Panasonic Intellectual Property Corporation of America
- Inventors: Takashi Yamamoto; Tomoya Sugano; Takamitsu Kamada
- Web page: https://patentgrep.com/patent/US12111544B2

## 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 thin film transistor which are located in a display region;
a counter substrate having color filters and protrusions; and
a sealing material bonding between the TFT substrate and the counter substrate, wherein
the color filters include a first portion which is separated from the color filters in the display region and located in the peripheral region,
the first portion are located along an extending direction of the sealing material,
the protrusions include first protrusions and a second protrusion which are in a peripheral region surrounding the display region,
the first protrusions and the second protrusion are overlapped with the sealing material,
the first protrusions are located along the extending direction of the sealing material and separated from each other,
the second protrusion is linearly formed along the extending direction of the sealing material,
the first protrusions and the second protrusion do not overlap each other, and
the second protrusion is closer to the display region than the first portion.

### Claim 2 (depends on 1)

The display device according to claim 1, wherein
the sealing material has a portion that overlaps the second protrusion and is thinner than the other portion of the sealing material.

### Claim 3 (depends on 1)

The display device according to claim 1, wherein
the color filters include a second portion which is separated from the color filters in the display region and located in the peripheral region, and
the second portion is separated from the first portion.

### Claim 4 (depends on 3)

The display device according to claim 3, wherein
the first portion overlaps one of the first protrusions in a sectional view, and
the second portion overlaps another one of the first protrusions in the sectional view.

### Claim 5 (depends on 2)

The display device according to claim 2, wherein
the portion of the sealing material is located between the first portion and the second portion.

### Claim 6 (depends on 1)

The display device according to claim 1, wherein
the second protrusion is located between the first protrusions.

### Claim 7 (depends on 1)

The display device according to claim 1, wherein
the first protrusions are in contact with the TFT substrate.