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US 9,001,292 B2Granted
Color filter and liquid crystal display
AssigneeAu Optronics Corporation
InventorsKuei-Bai Chen, Chien-Kai Chen, Chen-Hsien Liao, Chia-Hao Li
Life of this patent
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Abstract
Disclosed herein is a color filter, which includes a substrate and a green color resist. The green color resist is disposed on the substrate. The green color resist has a function A(λ) defined by a product of the transmittance spectrum of the green color resist and the CIE color matching function z(λ). The function A(λ) has a maximum of less than 0.28, and the function A(λ) satisfies the following formula (II): ∫380780A(λ)dλ>10.26 formula (II).
Claims18
A color filter, comprising:
- a substrate;
- and
- a green color resist disposed on a surface of the substrate, wherein the green color resist has a transmittance spectrum T(λ) which is a function of the wavelength λ of light passing through the green color resist, and a function A(λ) defined by a product of the transmittance spectrum T(λ) and a CIE color matching function z(λ) the function A(λ) being represented by the following formula (I):
- A(λ)=T(λ)× z(λ) formula (I),
- wherein the function A(λ) has a maximum of less than 0.28 when the wavelength λ is in the range from 380 nm to 780 nm, and the function A(λ) satisfies the requirements of the following formula (II):
- ∫380780A(λ)dλ>10.26 formula (II);
- wherein the transmittance spectrum T(λ) has a maximum of greater than 0.9, and the transmittance spectrum T(λ) produces a chromaticity x of 0.28 to 0.327 and a chromaticity y of 0.6 to 0.62 in the CIE 1931 chromaticity diagram, wherein a CIE standard illuminant C is used as a theoretical light source.
4 more elements
A liquid crystal display device, comprising:
- an active array substrate;
- a liquid crystal layer disposed over the active array substrate;
- a color filter disposed over the liquid crystal layer, wherein the color filter comprises:
- a substrate;
- and
- a green color resist disposed on a surface of the substrate, wherein the green color resist has a transmittance spectrum T(λ) which is a function of the wavelength λ of light passing through the green color resist, and a function A(λ)defined by a product of the transmittance spectrum T(λ) and a CIE color matching function z(λ) the function A(λ) being represented by the following formula (I):
- A(λ)=T(λ)× z(λ) formula (I),
- wherein the function A(λ) has a maximum of less than 0.28 when the wavelength λ is in the range from 380 nm to 780 nm, and the function A(λ) satisfies the requirements of the following formula (II):
- ∫380780A(λ)dλ>10.26 formula (II);
- wherein the transmittance spectrum T(λ) has a maximum of greater than 0.9, and the transmittance spectrum T(λ) produces a chromaticity x of 0.28 to 0.327 and a chromaticity y of 0.6 to 0.62 in the CIE 1931 chromaticity diagram, wherein a CIE standard illuminant C is used as a theoretical light source;
- and
- a backlight module disposed below the active array substrate and configured to emit a light.
9 more elements
Dependencies are inferred from the claim text.