# US 9,753,327 B2 · Liquid crystal display device

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 9,753,327 B2
- Document ID: US9753327B2
- Status: Granted
- Kind: B2
- Application number: 15/059,845
- Filed: 2016-03-03
- Published: 2016-12-29
- Granted: 2017-09-05
- Earliest claimed: 2015-06-23
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Haeil Park; Kisoo Park; Junghyun Kwon; Youngmin Kim; Kwangkeun Lee; Junhan Lee
- Web page: https://patentgrep.com/patent/US9753327B2

## CPC

- G02F 1/133617: {Illumination with ultraviolet light; Luminescent elements or materials associated to the cell}
- G02F 1/1335: Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F 1/133528: {Polarisers}
- G02F 1/133514: {Colour filters}
- G02F 1/133548: {Wire-grid polarisers}
- G02F 1/133614: {using photoluminescence, e.g. phosphors illuminated by UV or blue light}
- 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 display device includes: a first polarizer, a second polarizer, a liquid crystal layer, a color conversion member, an emission layer, and a first substrate. The second polarizer is disposed on the first polarizer. The liquid crystal layer is disposed between the first polarizer and the second polarizer. The color conversion member is disposed between the liquid crystal layer and the second polarizer. The emission layer is disposed on the second polarizer. The emission layer is configured to absorb at least a portion of light passed through the color conversion member and the second polarizer, and to emit light corresponding to at least a blue wavelength. The first substrate is disposed on the emission layer.

## Claims

### Claim 1

A display device, comprising:
a first polarizer;
a second polarizer disposed on the first polarizer;
a liquid crystal layer disposed between the first polarizer and the second polarizer;
a color conversion member disposed between the liquid crystal layer and the second polarizer;
an emission layer disposed on the second polarizer, the emission layer configured to:
absorb at least a portion of light passed through the color conversion member and the second polarizer, and
emit light corresponding to at least a blue wavelength; and
a first substrate disposed on the emission layer.

### Claim 2 (depends on 1)

The device of claim 1, wherein:
at least a portion of the emission layer satisfies d2>d1 and I2>I1;
d1 and d2 represent lengths of light paths through the emission layer; and
I2 and I1 represent intensities of light from the emission layer in association with the light paths of lengths d2 and d1, respectively.

### Claim 3 (depends on 1)

The device of claim 1, wherein:
a thickness of the emission layer is about 0.5 μm or less; and
the emission layer is configured to:
transmit a portion of incident light,
absorb a portion of the incident light, and
emit light of a wavelength different from a wavelength of the incident light.

### Claim 4 (depends on 1)

The device of claim 1, wherein the color conversion member comprises a red pixel region, a green pixel region, and a blue pixel region.

### Claim 5 (depends on 4)

The device of claim 4, wherein thickness of the blue pixel region is greater than thicknesses of the red pixel region and the green pixel region.

### Claim 6 (depends on 4)

The device of claim 4, wherein the color conversion member further comprises a white pixel region.

### Claim 7 (depends on 6)

The device of claim 6, wherein the emission layer comprises a pattern corresponding to the blue pixel region and the white pixel region.

### Claim 8 (depends on 1)

The device of claim 1, wherein the emission layer comprises at least one of a quantum dot and a fluorescent substance.

### Claim 9 (depends on 8)

The device of claim 8, wherein the emission layer further comprises at least one of blue pigment, blue dye, and a scatterer.

### Claim 10 (depends on 1)

The device of claim 1, wherein the second polarizer comprises a wire grid polarizer.

### Claim 11 (depends on 1)

The device of claim 1, further comprising:
a second substrate facing the first substrate, the liquid crystal layer being disposed between the first substrate and the second substrate,
wherein the first polarizer is disposed between the second substrate and the liquid crystal layer or the second substrate is disposed between the first polarizer and the liquid crystal layer.

### Claim 12 (depends on 1)

The device of claim 1, further comprising:
a backlight unit configured to emit white light towards the first polarizer.

### Claim 13

A display device, comprising:
a first polarizer;
a second polarizer disposed on the first polarizer;
a liquid crystal layer disposed between the first polarizer and the second polarizer;
a color conversion member disposed between the liquid crystal layer and the first polarizer;
an emission layer disposed on the second polarizer, the emission layer configured to:
absorb at least a portion of light passed through the color conversion member and the second polarizer, and
emit light of a wavelength different from a wavelength of the absorbed light; and
a first substrate disposed on the emission layer.

### Claim 14 (depends on 13)

The device of claim 13, wherein:
at least a portion of the emission layer satisfies d2>d1 and I2>I1;
d1 and d2 represent lengths of light paths through the emission layer; and
I2 and I1 represent intensities of light from the emission layer in association with the light paths of lengths d2 and d1, respectively.

### Claim 15 (depends on 13)

The device of claim 13, wherein:
a thickness of the emission layer is about 0.5 μm or less; and
the emission layer is configured to:
transmit a portion of incident light,
absorb a portion of the incident light, and
emit light corresponding to at least a blue wavelength.

### Claim 16 (depends on 13)

The device of claim 13, wherein the color conversion member comprises a red pixel region, a green pixel region, and a blue pixel region.

### Claim 17 (depends on 16)

The device of claim 16, wherein the color conversion member further comprises a white pixel region.

### Claim 18 (depends on 13)

The device of claim 13, wherein the emission layer comprises at least one of a quantum dot and a fluorescent substance.

### Claim 19 (depends on 18)

The device of claim 18, wherein the emission layer further comprises at least one of blue pigment, blue dye, and a scatterer.

### Claim 20 (depends on 13)

The device of claim 13, wherein the second polarizer comprises a wire grid polarizer.