Liquid crystal display device

1. A color filter layer at least comprising a blue color filter, a green color filter and a red color filter;

wherein the red color filter is formed from a red-coloring composition comprising a coloring agent (A R ), a binder (W R ) and a solvent (E R ) and meets the requirement represented by formula (Q1): 0.1≤F R ×C R ≤1.0, wherein F R represents the thickness (μm) of the red color filter, and C R represents the ratio of the amount of the coloring agent (A R ) to the total amount of the coloring agent (A R ) and the binder (W R ) in the red-coloring composition; and the coloring agent (A R ) comprises a dye selected from the group consisting of an azo dye, an azo metal complex dye, a xanthene dye and a coumarin dye, and a pigment selected from the group consisting of a diketopyrrolopyrrole pigment, an azo pigment, an anthraquinone pigment, a quinophthalone pigment, an isoindoline pigment and an azomethine pigment;

the green color filter is formed from a green-coloring composition comprising a coloring agent (A G ), a binder (W G ) and a solvent (E G ) and meets the requirement represented by formula (Q2): 0.1≤F G ×C G ≤1.2, wherein F G represents the thickness (μm) of the green color filter, and C G represents the ratio of the amount of the coloring agent (A G ) to the total amount of the coloring agent (A G ) and the binder (W G ) in the green-coloring composition; and the coloring agent (A G ) comprises a dye selected from the group consisting of a phthalocyanine dye, a triarylmethane dye and a squarylium dye, and a phthalocyanine pigment;

the blue color filter is formed from a blue-coloring composition comprising a coloring agent (A B ), a binder (W B ) and a solvent (E B ) and meets the requirement represented by formula (Q3): 0.1≤F B ×C B ≤1.0, wherein F B represents the thickness (μm) of the blue color filter, and C B represents the ratio of the amount of the coloring agent (A B ) to the total amount of the coloring agent (A B ) and the binder (W B ) in the blue-coloring composition; and the coloring agent (A B ) comprises a dye selected from the group consisting of a phthalocyanine dye, a triarylmethane dye, an anthraquinone dye, a xanthene dye and a methine dye, and a pigment selected from the group consisting of a phthalocyanine pigment, an anthraquinone pigment and a dioxazine pigment; and

the color filter layer being made to be used in a liquid crystal display device equipped with a light-emitting device which comprises a light source and a color conversion layer containing a quantum dot.

2. A method for producing a red color filter in a liquid crystal display device as defined in claim 1 , which comprises a color filter layer and a light-emitting device which comprises a light source and a color conversion layer containing a quantum dot wherein the color filter layer at least comprises a blue color filter, a green color filter and a red color filter;

the red color filter is formed from a red-coloring composition comprising a coloring agent (A R ), a binder (W R ) and a solvent (E R ) and meets the requirement represented by formula (Q1): 0.1≤F R ×C R ≤1.0, wherein F R represents the thickness (μm) of the red color filter, and C R represents the ratio of the amount of the coloring agent (A R ) to the total amount of the coloring agent (A R ) and the binder (W R ) in the red-coloring composition;

the green color filter is formed from a green-coloring composition comprising a coloring agent (A G ), a binder (W G ) and a solvent (E G ) and meets the requirement represented by formula (Q2): 0.1≤F G ×C G ≤1.2, wherein F G represents the thickness (μm) of the green color filter, and C G represents the ratio of the amount of the coloring agent (A G ) to the total amount of the coloring agent (A G ) and the binder (W G ) in the green-coloring composition;

the blue color filter is formed from a blue-coloring composition comprising a coloring agent (A B ), a binder (W B ) and a solvent (E B ) and meets the requirement represented by formula (Q3): 0.1≤F B ×C B ≤1.0, wherein F B represents the thickness (μm) of the blue color filter, and C B represents the ratio of the amount of the coloring agent (A B ) to the total amount of the coloring agent (A B ) and the binder (W B ) in the blue-coloring composition;

an emission spectrum of light emitted from the light-emitting device has a first emission peak, a second emission peak and a third emission peak,

the wavelength (λ 1 ) of the first emission peak ranges from 420 to 480 nm,

the wavelength (λ 2 ) of the second emission peak ranges from 500 to 550 nm, and

the wavelength (λ 3 ) of the third emission peak ranges from 580 to 650 nm;

the method comprising the step of applying the red-coloring composition comprising a coloring agent (A R ), a binder (W R ) and a solvent (E R ) onto a substrate;

wherein the red color filter meets the requirement represented by formula (Q1); and

the coloring agent (A R ) comprises a dye selected from the group consisting of an azo dye, an azo metal complex dye, a xanthene dye and a coumarin dye, and a pigment selected from the group consisting of a diketopyrrolopyrrole pigment, an azo pigment, an anthraquinone pigment, a quinophthalone pigment, an isoindoline pigment and an azomethine pigment.

3. A method for producing a green color filter in a liquid crystal display device which comprise a color filter layer and a light-emitting device which comprises a light source and a color conversion layer containing a quantum dot;

wherein the color filter layer at least comprises a blue color filter, a green color filter and a red color filter;

the red color filter is formed from a red-coloring composition comprising a coloring agent (A R ), a binder (W R ) and a solvent (E R ) and meets the requirement represented by formula (Q1): 0.1≤F R ×C R ≤1.0, wherein F R represents the thickness (μm) of the red color filter, and C R represents the ratio of the amount of the coloring agent (A R ) to the total amount of the coloring agent (A R ) and the binder (W R ) in the red-coloring composition;

the green color filter is formed from a green-coloring composition comprising a coloring agent (A G ), a binder (W G ) and a solvent (E G ) and meets the requirement represented by formula (Q2): 0.1≤F G ×C G ≤1.2, wherein F G represents the thickness (μm) of the green color filter, and C G represents the ratio of the amount of the coloring agent (A G ) to the total amount of the coloring agent (A G ) and the binder (W G ) in the green-coloring composition;

the blue color filter is formed from a blue-coloring composition comprising a coloring agent (A B ), a binder (W B ) and a solvent (E B ) and meets the requirement represented by formula (Q3): 0.1≤F B ×C B ≤1.0, wherein F B represents the thickness (μm) of the blue color filter, and C B represents the ratio of the amount of the coloring agent (A B ) to the total amount of the coloring agent (A B ) and the binder (W B ) in the blue-coloring composition;

an emission spectrum of light emitted from the light-emitting device has a first emission peak, a second emission peak and a third emission peak,

the wavelength (λ 1 ) of the first emission peak ranges from 420 to 480 nm,

the wavelength (λ 2 ) of the second emission peak ranges from 500 to 550 nm, and

the wavelength (λ 3 ) of the third emission peak ranges from 580 to 650 nm;

the method comprising the step of applying the green-coloring composition comprising a coloring agent (A G ), a binder (W G ) and a solvent (E G ) onto a substrate;

wherein the green color filter meets the requirement represented by formula (Q2); and

the coloring agent (A G ) comprises a dye selected from the group consisting of a phthalocyanine dye, a triarylmethane dye and a squarylium dye, and a phthalocyanine pigment.

4. A method for producing a blue color filter in a liquid crystal display device which comprise a color filter layer and a light-emitting device which comprises a light source and a color conversion layer containing a quantum dot;

wherein the color filter layer at least comprises a blue color filter, a green color filter and a red color filter;

the red color filter is formed from a red-coloring composition comprising a coloring agent (A R ), a binder (W R ) and a solvent (E R ) and meets the requirement represented by formula (Q1): 0.1≤F R ×C R ≤1.0, wherein F R represents the thickness (μm) of the red color filter, and C R represents the ratio of the amount of the coloring agent (A R ) to the total amount of the coloring agent (A R ) and the binder (W R ) in the red-coloring composition;

the green color filter is formed from a green-coloring composition comprising a coloring agent (A G ), a binder (W G ) and a solvent (E G ) and meets the requirement represented by formula (Q2): 0.1≤F G ×C G ≤1.2, wherein F G represents the thickness (μm) of the green color filter, and C G represents the ratio of the amount of the coloring agent (A G ) to the total amount of the coloring agent (A G ) and the binder (W G ) in the green-coloring composition;

the blue color filter is formed from a blue-coloring composition comprising a coloring agent (A B ), a binder (W B ) and a solvent (E B ) and meets the requirement represented by formula (Q3): 0.1≤F B ×C B ≤1.0, wherein F B represents the thickness (μm) of the blue color filter, and C B represents the ratio of the amount of the coloring agent (A B ) to the total amount of the coloring agent (A B ) and the binder (W B ) in the blue-coloring composition;

an emission spectrum of light emitted from the light-emitting device has a first emission peak, a second emission peak and a third emission peak,

the wavelength (λ 1 ) of the first emission peak ranges from 420 to 480 nm,

the wavelength (λ 2 ) of the second emission peak ranges from 500 to 550 nm, and

the wavelength (λ 3 ) of the third emission peak ranges from 580 to 650 nm;

the method comprising the step of applying the blue-coloring composition comprising a coloring agent (A B ), a binder (W B ) and a solvent (E B ) onto a substrate;

wherein the blue color filter meets the requirement represented by formula (Q3); and

the coloring agent (A B ) comprises a dye selected from the group consisting of a phthalocyanine dye, a triarylmethane dye, an anthraquinone dye, a xanthene dye and a methine dye, and a pigment selected from the group consisting of a phthalocyanine pigment, an anthraquinone pigment and a dioxazine pigment.