# US 2017/0285248 A1 · Liquid Crystal Display Comprising Absorption Dyes

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- Number: US 2017/0285248 A1
- Document ID: US20170285248A1
- Status: Published application
- Kind: A1
- Application number: 15/474,891
- Filed: 2017-03-30
- Published: 2017-10-05
- Earliest claimed: 2016-04-01
- Assignees: SKC Haas Display Films Co., Ltd.
- Applicants: SKC Haas Display Films Co., Ltd.
- Inventors: Hong Youl CHO; Kyoo Choong CHO; Yong Jae CHOE; Hyun Cheol NAM
- Web page: https://patentgrep.com/patent/US20170285248A1

## CPC

- G02B 6/0056: {for producing polarisation effects, e.g. by a surface with polarizing properties or by an additional polarizing elements}
- G02B 6/0051: {Diffusing sheet or layer}
- G02B 6/0053: {Prismatic sheet or layer; Brightness enhancement element, sheet or layer}
- G02B 6/0055: {Reflecting element, sheet or layer}
- G02B 6/0063: {for extracting light out both the major surfaces of the light guide}
- G02F 1/133528: {Polarisers}
- G02F 1/133617: {Illumination with ultraviolet light; Luminescent elements or materials associated to the cell}
- G02F 1/133507: {Films for enhancing the luminance}
- G02F 1/133536: {Reflective polarizers (G02F1/13362 takes precedence)}
- G02F 1/133614: {using photoluminescence, e.g. phosphors illuminated by UV or blue light}
- G02F 2202/04: dye
- G02F 2202/28: Adhesive materials or arrangements
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- 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

The present invention relates to a liquid crystal display comprising an absorption dye, wherein the liquid crystal display of the present invention may enhance color gamut and brightness by transmitting pure red, green, and blue (RGB) wavelengths emitted from a light source as much as possible and absorbing unnecessary wavelengths other than the RGB wavelengths.

## Claims

### Claim 1

A liquid crystal display comprising:
a backlight unit; and
a liquid crystal panel,
wherein the backlight unit sequentially comprises two or more of a reflective polarizing film, a prism sheet, a diffusion sheet, a light guide plate, and a reflective plate, and
wherein the reflective polarizing film comprises an absorption dye which includes at least one of a hydroxy benzotriazole-based dye and a tetra aza porphyrin-based dye.

### Claim 2 (depends on 1)

The liquid crystal display of claim 1, wherein the reflective polarizing film sequentially comprises a first polyester layer, a first adhesive layer, a core layer, a second adhesive layer, a second polyester layer, and a rear bead layer, and
wherein the reflective polarizing film has a coating layer including the absorption dye on at least one position of one side or both sides of the first polyester layer, one side or both sides of the core layer, and one side or both sides of the second polyester layer, or comprises the absorption dye in the first adhesive layer, the second adhesive layer, or both thereof.

### Claim 3 (depends on 1)

The liquid crystal display of claim 1, wherein the reflective polarizing film sequentially comprises a diffusion bead layer, a diffusion coating layer, a core layer, an adhesive layer, a polyester layer, and a rear bead layer, and
wherein the reflective polarizing film has a coating layer including the absorption dye on at least one position of one side or both sides of the core layer and one side or both sides of the polyester layer, or comprises the absorption dye in the diffusion coating layer, the adhesive layer, or both thereof.

### Claim 4 (depends on 2)

The liquid crystal display of claim 2, wherein the core layer is a laminated film in which a first polymer layer and a second polymer layer having different refractive indices from each other are alternatingly stacked to selectively reflect and transmit a visible light having a specific wavelength.

### Claim 5 (depends on 3)

The liquid crystal display of claim 3, wherein the core layer is a laminated film in which a first polymer layer and a second polymer layer having different refractive indices from each other are alternatingly stacked to selectively reflect and transmit a visible light having a specific wavelength.

### Claim 6 (depends on 1)

The liquid crystal display of claim 1, wherein the absorption dye further comprises a dye absorbing a wavelength band of 480 nm to 510 nm or 560 nm to 610 nm.

### Claim 7 (depends on 2)

The liquid crystal display of claim 2, wherein the absorption dye further comprises a dye absorbing a wavelength band of 480 nm to 510 nm or 560 nm to 610 nm.

### Claim 8 (depends on 3)

The liquid crystal display of claim 3, wherein the absorption dye further comprises a dye absorbing a wavelength band of 480 nm to 510 nm or 560 nm to 610 nm.

### Claim 9 (depends on 6)

The liquid crystal display of claim 6, wherein the dye is at least one selected from the group consisting of a cyanine-based dye, a pyrrole methine-based dye, a rhodamine-based dye, and a boron dipyrromethene-based dye.

### Claim 10 (depends on 7)

The liquid crystal display of claim 7, wherein the dye is at least one selected from the group consisting of a cyanine-based dye, a pyrrole methine-based dye, a rhodamine-based dye, and a boron dipyrromethene-based dye.

### Claim 11 (depends on 8)

The liquid crystal display of claim 8, wherein the dye is at least one selected from the group consisting of a cyanine-based dye, a pyrrole methine-based dye, a rhodamine-based dye, and a boron dipyrromethene-based dye.

### Claim 12 (depends on 9)

The liquid crystal display of claim 9, wherein the absorption dye is a combination of the hydroxy benzotriazole-based dye, the cyanine-based dye, and the tetra aza porphyrin-based dye.

### Claim 13 (depends on 10)

The liquid crystal display of claim 10, wherein the absorption dye is a combination of the hydroxy benzotriazole-based dye, the cyanine-based dye, and the tetra aza porphyrin-based dye.

### Claim 14 (depends on 11)

The liquid crystal display of claim 11, wherein the absorption dye is a combination of the hydroxy benzotriazole-based dye, the cyanine-based dye, and the tetra aza porphyrin-based dye.

### Claim 15 (depends on 2)

The liquid crystal display of claim 2, wherein the absorption dye is included in an amount of 0.01 wt % to 10 wt % based on the total weight of the absorption dye-containing coating layer or adhesive layer.

### Claim 16 (depends on 3)

The liquid crystal display of claim 3, wherein the absorption dye is included in an amount of 0.01 wt % to 10 wt % based on the total weight of the absorption dye-containing coating layer or adhesive layer.

### Claim 17 (depends on 1)

The liquid crystal display of claim 1, wherein the liquid crystal panel sequentially comprises an upper polarizing plate, an adhesive layer I, a liquid crystal cell, an adhesive layer II, and a lower polarizing plate.