# US 10,871,677 B2 · Wide color gamut film, composition for preparing the same, polarizing plate comprising the same, and liquid crystal display comprising the polarizer plate

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- Number: US 10,871,677 B2
- Document ID: US10871677B2
- Status: Granted
- Kind: B2
- Application number: 15/741,476
- Filed: 2016-07-06
- Published: 2018-12-27
- Granted: 2020-12-22
- Earliest claimed: 2015-07-06
- Assignees: LG Chem, Ltd.
- Applicants: LG Chem, Ltd.
- Inventors: Han Na Lee; Byung Min Lee; Kyung Ki Hong; Yeong Rae Chang; Dong Hwan Ryu
- Web page: https://patentgrep.com/patent/US10871677B2

## CPC

- G02F 1/133606: {including a specially adapted diffusing, scattering or light controlling members}
- C08L 57/10: containing oxygen atoms
- C08L 57/12: containing nitrogen atoms
- C09D 4/00: Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond {; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16}
- C09D 5/32: Radiation-absorbing paints {(protection against X-, gamma- or corpuscular radiation G21F)}
- C09D 7/63: organic
- C09D 133/06: of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- G02B 5/0242: {by means of dispersed particles}
- G02B 5/223: {containing organic substances, e.g. dyes, inks or pigments}
- G02F 1/133509: {Filters, e.g. light shielding masks}
- G02F 1/133528: {Polarisers}
- C08K 5/3467: having more than two nitrogen atoms in the ring
- C08L 2203/16: used for films
- C08L 2203/20: use in electrical or conductive gadgets
- C09B 47/00: Porphines; Azaporphines {(non-dyeing compounds C07D487/22)}
- G02B 5/3025: {Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state (G02B5/3008, G02B5/3016 take precedence)}
- G02F 1/133514: {Colour filters}
- G02F 1/133607: {the light controlling member including light directing or refracting elements, e.g. prisms or lenses}
- G02F 2202/28: Adhesive materials or arrangements
- 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
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C09B: ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES {, e.g. PIGMENTS}; MORDANTS; LAKES (fermentation or enzyme using processes to synthesise a desired chemical compound C12P)

## Abstract

The present disclosure relates to a wide color gamut film, a composition for preparing the same, a polarizing plate including the same, and a liquid crystal display including the polarizing plate. More specifically, the present disclosure relates to a wide color gamut film capable of improving color gamut by increasing color purity and exhibiting excellent physical and optical characteristics, a composition for preparing the same, a polarizing plate including the same, and a liquid crystal display including the polarizing plate.

## Claims

### Claim 1

A wide color gamut film comprising:
a substrate; and
a photocurable resin layer provided on at least one complete face of the substrate,
wherein a maximum absorption wavelength is 585 to 600 nm, and an average light transmittance at a wavelength of 650 to 710 nm is more than 90%,
wherein the wide color gamut film has a pencil hardness under a load of 500 g that is H or higher, and
wherein the wide color gamut film comprises 1 to 5 parts by weight of a dye or a pigment having a maximum absorption wavelength of 580 to 610 nm based on 100 parts by weight of the photocurable resin layer.

### Claim 2 (depends on 1)

The wide color gamut film of claim 1, wherein an average light transmittance at a wavelength of 400 to 550 nm is more than 70%, and
an average light transmittance at a wavelength of 580 to 610 nm is more than 20% and less than 50%.

### Claim 3 (depends on 1)

The wide color gamut film of claim 1, wherein the wide color gamut film does not have any scratches after moving the same 10 times back and forth in a friction tester with a steel wool #0 under a load of 200 g.

### Claim 4 (depends on 1)

The wide color gamut film of claim 1, wherein the dye or the pigment having a maximum absorption wavelength of 580 to 610 nm comprises at least one selected from the group consisting of a porphyrin derivative compound, a cyanine derivative compound, and a squarylium derivative compound.

### Claim 5 (depends on 1)

The wide color gamut film of claim 1, wherein a change in light transmittance of the following Formula 1 is less than 5%:
A
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change
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in
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light
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transmittance
=
(
an
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average
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light
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transmittance
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at
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a
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wavelength
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of
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650
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to
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710
⁢
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nm
⁢
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before
⁢
⁢
UV
⁢
⁢
curing
-
an
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⁢
average
⁢
⁢
light
⁢
⁢
transmittance
⁢
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at
⁢
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a
wavelength
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of
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650
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to
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710
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nm
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after
⁢
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UV
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an
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average
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light
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transmittance
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at
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wavelength
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of
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650
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710
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before
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UV
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×
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[
Formula
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1
]
in Formula 1, UV curing means that a composition for forming a photocurable resin layer is coated on a transparent substrate, and is cured using ultraviolet light having a wavelength of 290 to 320 nm at an irradiation dose of 20 to 600 mJ/cm2.

### Claim 6 (depends on 1)

A polarizing plate, comprising:
a polarizer; and
a protective film on at least one face of the polarizer,
wherein the protective film comprises the wide color gamut film of claim 1.

### Claim 7 (depends on 6)

A liquid crystal display comprising:
a backlight unit;
a prism sheet provided on the backlight unit; and
the polarizing plate of claim 6,
wherein the polarizing plate is provided on the prism sheet, and the wide color gamut film of the polarizing plate is laminated to face the prism sheet.

### Claim 8 (depends on 7)

The liquid crystal display of claim 7, further comprising a diffusion film or DBEF (Dual Brightness Enhancement Film) between the prism sheet and the polarizing plate.