Back to results
US 7,804,561 B2Granted
Colored composition for color filters, color filter and liquid crystal display device
AssigneeToppan Printing Co., Ltd.
InventorsHiroshi Sasaki, Kazunori Yamada, Yusuke Iida, Noriko Asashi
Life of this patent
Estimating the term…
Abstract
A cyan-colored composition for a color filter contains a phthalocyanine blue pigment comprising either of C.I. Pigment Blue 15:3 and C.I. Pigment Blue 15:4, or both, a phthalocyanine green pigment comprising C.I. Pigment Green 7, and a pigment carrier consisting of a transparent resin, a precursor of the resin or a mixture thereof. A color filter includes a red-colored filter segment, a green-colored filter segment, a blue-colored filter segment, and a cyan-colored filter segment or a yellow-colored filter segment.
Claims9
A liquid crystal display device, comprising:
- a color filter having
- a red-colored filter segment;
- a green-colored filter segment;
- a blue-colored filter segment;
- and
- a yellow-colored filter segment,
- wherein the yellow-colored filter segment is formed by using a yellow-colored composition including a yellow pigment, a pigment dispersant, and a pigment carrier consisting of a transparent resin, a precursor of the resin or a mixture thereof,
- wherein the transparent resin includes a copolymer of a first compound represented by
- wherein R14 denotes a hydrogen atom or a methyl group, R15 denotes an alkylene group, R16 denotes a hydrogen atom or an alkyl group having 1 to 20 carbon atoms, which may contain a substituent, and m is an integer of 1 to 15, and a second compound having an ethylenically unsaturated double bond;
- and
- a pseudo-white LED light source formed of a blue LED whose surface is coated with a phosphor,
- wherein the pseudo-white LED light source has spectral properties such that an emission intensity becomes maximum, I1, at a wavelength λ1, which is within a wavelength range of 430 nm to 485 nm, and the emission intensity has a peak, I2, at a wavelength λ2, which is within a wavelength range of 530 nm to 580 nm, and a ratio of I2/I1 is between 0.2 and 0.7.
9 more elements
A liquid crystal display device, comprising:
- a color filter having
- a red-colored filter segment;
- a green-colored filter segment;
- a blue-colored filter segment;
- and
- a yellow-colored filter segment,
- wherein the yellow-colored filter segment is formed by using a yellow-colored composition including a yellow pigment, a pigment dispersant, and a pigment carrier consisting of a transparent resin, a precursor of the resin or a mixture thereof,
- wherein the transparent resin includes a copolymer of a first compound represented by
- wherein R14 denotes a hydrogen atom or a methyl group, R15 denotes an alkylene group, R16 denotes a hydrogen atom or an alkyl group having 1 to 20 carbon atoms, which may contain a substituent, and m is an integer of 1 to 15, and a second compound having an ethylenically unsaturated double bond;
- and
- a cold-cathode fluorescent tube light source, wherein the cold cathode fluorescent tube light source has spectral properties such that an emission intensity has a local maximum I3 at a wavelength λ3, which is within a wavelength range of 470 nm to 530 nm, and the emission intensity also has a maximum I4 at a wavelength λ4, which is within a wavelength range of 530 nm to 580 nm, and a ratio I3/I4 is between 0.2 and 0.7.
8 more elements
A liquid crystal display device, comprising:
- a color filter having
- a red-colored filter segment;
- a green-colored filter segment;
- a blue-colored filter segment;
- and
- a yellow-colored filter segment,
- wherein the yellow-colored filter segment is formed by using a yellow-colored composition including a yellow pigment, a pigment dispersant, and a pigment carrier consisting of a transparent resin, a precursor of the resin or a mixture thereof,
- wherein the transparent resin includes a copolymer of a first compound represented by
- wherein R14 denotes a hydrogen atom or a methyl group, R15 denotes an alkylene group, R16 denotes a hydrogen atom or an alkyl group having 1 to 20 carbon atoms, which may contain a substituent, and m is an integer of 1 to 15, and a second compound having an ethylenically unsaturated double bond;
- and
- a three-color LED light source, wherein the three-color LED light source has spectral properties such that an emission intensity has a maximum, I5, at a wavelength λ5, which is within a wavelength range of 430 nm to 485 nm, and the emission intensity also has a local maximum, I6 at a wavelength λ6, which is within a wavelength range of 530 nm to 580 nm, and a ratio of I6/I5 is between 0.2 and 0.7.
8 more elements
Dependencies are inferred from the claim text.