Patents by Inventor Koichi Minato
Koichi Minato has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20130002974Abstract: A counter substrate for liquid crystal display includes a transparent substrate, a black matrix, and stripe transparent electrodes. The black matrix divides a plane surface of the transparent substrate into pixel or sub-pixel unit to form a light-shielded area and openings above the plane surface. The stripe transparent electrodes are formed into the pixel unit or the sub-pixel unit above the plane surface. The black matrix includes a frame pattern including two sides facing each other in parallel in the pixel or the sub-pixel unit, and a linear central pattern which is parallel to the two sides of the frame pattern and is formed at a midsection of the pixel or the sub-pixel unit. The transparent electrodes are each parallel to the two sides of the frame pattern and the central pattern and are located symmetrically to the central pattern.Type: ApplicationFiled: April 10, 2012Publication date: January 3, 2013Applicant: TOPPAN PRINTING CO., LTD.Inventors: Koichi MINATO, Kenzo Fukuyoshi, Mie Shimizu
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Publication number: 20120262653Abstract: A liquid crystal display device includes an array substrate and a counter substrate that face each other with a liquid crystal layer therebetween. The array substrate includes a first electrode, a second electrode, and an alignment sustaining layer. The first electrode has a comb-teeth shape. The second electrode has a comb-teeth shape, faces the first electrode, and includes a protruding portion protruding from the first electrode in a direction where comb teeth are arranged. The alignment sustaining layer is formed above a surface of the array substrate being in contact with the liquid crystal layer and gives liquid crystals a pre-tilt to a direction in which the second electrode protrudes from the first electrode, in a direction in which the comb teeth are arranged.Type: ApplicationFiled: April 10, 2012Publication date: October 18, 2012Applicant: TOPPAN PRINTING CO., LTD.Inventors: Mie SHIMIZU, Koichi Minato, Kenzo Fukuyoshi, Manabu Ito
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Patent number: 8268201Abstract: A color filter and a liquid crystal display device with the color filter that includes a substrate; and a color layer formed on the substrate and constituting color pixels of a plurality of colors, wherein the color layer is formed through a curing of a color composition comprising at least acrylic resin and a coloring agent, wherein the acrylic resin contains a copolymer formed of a first vinyl monomer having a benzyl group and a second vinyl monomer having a carboxyl group, the first vinyl monomer having a function of regulating a retardation of a color layer, the copolymer having a weight average molecular weight of 3000 to 11000 and an acid value of solid matter falling within the range of 30 to 85.Type: GrantFiled: April 29, 2011Date of Patent: September 18, 2012Assignees: Toppan Printing Co., Ltd., DIC CorporationInventors: Mie Shimizu, Koichi Minato, Masaharu Takahashi
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Patent number: 8262946Abstract: Disclosed is a color composition for a color filter, which includes at least acrylic resin and a coloring agent. The acrylic resin contains a copolymer formed of a first vinyl monomer having a benzyl group and a second vinyl monomer having a carboxyl group, the copolymer having a weight average molecular weight of 3,000 to 11,000, and an acid value of solid matter of the copolymer being confined to 30 to 85.Type: GrantFiled: May 13, 2010Date of Patent: September 11, 2012Assignees: Toppan Printing Co., Ltd., DIC CorportionInventors: Mie Shimizu, Koichi Minato, Masaharu Takahashi
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Publication number: 20120094221Abstract: A method of a color filter substrate for a semitransmissive type liquid crystal display device, including: forming a photosensitive coloring composition layer containing a photo-polymerizable monomer, a resinous binder, a polymerization initiator, a coloring agent and a solvent on a surface of a transparent substrate, the surface being partitioned into a large number of pixel regions; exposing the photosensitive coloring composition layer to light; and developing the photosensitive coloring composition layer to form a transmissive portion and a reflective portion, the transmissive portion being assigned to colorize a transmitted light from a light source arranged on a rear surface side of a liquid crystal display device, the reflective portion being assigned to colorize a reflected light to be derived from reflection of an external light entering from the observer's side and having a through-hole with a diameter of 10 pm or less.Type: ApplicationFiled: December 27, 2011Publication date: April 19, 2012Applicant: TOPPAN PRINTING CO., LTD.Inventors: Mie Shimizu, Koichi Minato, Takeshi Itoi
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Patent number: 8081276Abstract: A coloring composition for a color filter includes a transparent resin, an organic pigment dispersed in the transparent resin, and a retardation-regulating agent dispersed in the transparent resin and containing a compound which is capable of increasing retardation in the thickness direction to minimize the difference in retardation among colored pixels. A color filter having colored pixels formed on a transparent substrate uses this coloring composition. A liquid crystal display device using this color filter may have improved black image quality and contrast.Type: GrantFiled: February 24, 2011Date of Patent: December 20, 2011Assignee: Toppan Printing Co., Ltd.Inventors: Koichi Minato, Mie Shimizu, Hidesato Hagiwara, Sohei Kadota
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Patent number: 8049844Abstract: A color filter includes red, green and blue filter segments and is adapted to be used in a liquid crystal display device using, as a light source, a white LED having specified spectral properties. The red filter segment has a 50% transmittance wavelength within a range of 595 to 610 nm and a transmittance of 85% or more at a wavelength of 630 nm. The blue filter segment has a maximum transmittance wavelength of 455 nm or less and a transmittance of 55% or more at a wavelength of 450 nm. A thickness of each of the red, green and blue filter segments is 3.0 ?m or less. A liquid crystal display device including this color filter and the white LED is also disclosed.Type: GrantFiled: August 29, 2008Date of Patent: November 1, 2011Assignees: Toyo Ink Mfg. Co., Ltd., Toppan Printing Co., Ltd.Inventors: Satoshi Okutsu, Kenro Sunahara, Atsushi Nishida, Yukino Miyagawa, Tomoyuki Kadowaki, Mie Shimizu, Takeshi Itoi, Koichi Minato
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Publication number: 20110215284Abstract: A color filter and a liquid crystal display device with the color filter that includes a substrate; and a color layer formed on the substrate and constituting color pixels of a plurality of colors, wherein the color layer is formed through a curing of a color composition comprising at least acrylic resin and a coloring agent, wherein the acrylic resin contains a copolymer formed of a first vinyl monomer having a benzyl group and a second vinyl monomer having a carboxyl group, the first vinyl monomer having a function of regulating a retardation of a color layer, the copolymer having a weight average molecular weight of 3000 to 11000 and an acid value of solid matter falling within the range of 30 to 85.Type: ApplicationFiled: April 29, 2011Publication date: September 8, 2011Applicants: TOPPAN PRINTING CO., LTD., DIC CORPORATIONInventors: Mie Shimizu, Koichi Minato, Masaharu Takahashi
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Publication number: 20110181818Abstract: Disclosed a color filter for a liquid crystal display device, which exhibits a color filter contrast of 9000 or more and includes a transparent substrate, and a plurality of color layers exhibiting different color from each other and formed on the transparent substrate, wherein each of the color layers is a cured film of a color resin composition containing a polymer composition obtained through a copolymerization of styrene and an unsaturated carboxylic acid-containing monomer, a content of the styrene in the polymer composition being confined to a range of not less than 75 mol. % and less than 95 mol. %, and a retardation in a thickness direction “Rth” of each of these color layers is confined within a range of 0 nm to ?10 nm.Type: ApplicationFiled: March 30, 2011Publication date: July 28, 2011Applicant: Toppan Printing Co., Ltd.Inventors: Koichi Minato, Mie Shimizu, Toshihisa Watanabe, Koki Tsubaki
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Publication number: 20110149215Abstract: Disclosed is a color filter substrate provided with a transparent substrate, and a plurality of color pixels including a green pixel and formed on the transparent substrate. The green pixel contains halogenated zinc phthalocyanine-based green pigment and at least one kind of yellow pigment and satisfies prescribed three conditions, and absolute value of retardation in thickness direction (Rth) of the green pixel is confined to no more than 2 nm.Type: ApplicationFiled: December 7, 2010Publication date: June 23, 2011Applicant: TOPPAN PRINTING CO., LTD.Inventors: Mie Shimizu, Takeshi Ikeda, Hidesato Hagiwara, Koichi Minato
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Publication number: 20110149216Abstract: A coloring composition for a color filter, which includes a transparent resin, an organic pigment dispersed in the transparent resin, and a retardation-regulating agent containing a compound which is capable of increasing a retardation. A color filter which is provided with colored pixels formed on a transparent substrate by using this coloring composition. A liquid crystal display device which is provided with this color filter.Type: ApplicationFiled: February 24, 2011Publication date: June 23, 2011Applicant: TOPPAN PRINTING CO., LTDInventors: Koichi Minato, Mie Shimizu, Hidesato Hagiwara, Sohei Kadota
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Patent number: 7965353Abstract: A color filter comprising a substrate, a red pixel, green pixel and blue pixel, each being disposed on the substrate, wherein a perpendicular optical retardation RRth of the red pixel, a perpendicular optical retardation GRth of the green pixel, and a perpendicular optical retardation BRth of the blue pixel satisfy the following formulas (1) and (2): |(RRth?BRth)|?|(GRth?BRth)|?0??(1) |(RRth?BRth)|?|(RRth?GRth)|?0??(2) wherein RRth, GRth and BRth represent, respectively, a product of a thickness [nm] of a pixel and a value obtained by subtracting a value of thickness-wise refractive index from an average value of an in-plane refractive index of each of these pixels.Type: GrantFiled: December 19, 2007Date of Patent: June 21, 2011Assignee: Toppan Printing Co., Ltd.Inventors: Sosuke Akao, Koichi Minato, Satoshi Ohkuma, Yoshinori Nagasaki, Takeshi Itoi, Mitsuhisa Hatashima
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Patent number: 7948623Abstract: A method of evaluating a color filter including a substrate, and at least three color pixels disposed thereon, the method includes determining an oblique visibility of a liquid crystal display device equipped with the color filter on the basis of value ?1 obtained from the equation (1): ?1=?ab?(?)·T(?)d???(1) wherein “a” and “b” are values respectively representing a wavelength range of a continuous wavelength light and satisfying conditions of 380?a, b?780 and a<b; ?(?) represents an optical retardation obtained by irradiating each of color pixels with a continuous wavelength light containing light components with wavelength ? falling within a range of 380 nm to 780 nm at an incident angle, and subjecting the transmitted light to measurement using a spectroscopic ellipsometer, and T(?) represents a spectral transmittance of the color pixels measured at the wavelength ? falling within a range of 380 nm-780 nm.Type: GrantFiled: June 18, 2009Date of Patent: May 24, 2011Assignees: Toppan Printing Co., Ltd., Tokyo Ink Mfg. Co., Ltd.Inventors: Koichi Minato, Takeshi Itoi, Sosuke Akao, Hidesato Hagiwara, Masayuki Yamamoto, Yuki Saito
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Patent number: 7948583Abstract: A coloring composition for a color filter, which includes a transparent resin, an organic pigment dispersed in the transparent resin, and a retardation-regulating agent containing a compound which is capable of increasing a retardation. A color filter which is provided with colored pixels formed on a transparent substrate by using this coloring composition. A liquid crystal display device which is provided with this color filter.Type: GrantFiled: January 30, 2008Date of Patent: May 24, 2011Assignee: Toppan Printing Co., Ltd.Inventors: Koichi Minato, Mie Shimizu, Hidesato Hagiwara, Sohei Kadota
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Publication number: 20110096273Abstract: Disclosed is a color filter substrate which exhibits color filter contrast of not less than 9000 and includes a transparent substrate, and a plurality of color pixels differing in color and formed on the transparent substrate, wherein each of the plurality of color pixels is formed of a photosensitive color composition containing two or more kinds of pigments, a birefringence ?n of a pigment dispersion represented by following equation (1) and a content of pigments contained in the photosensitive composition satisfies prescribed conditions, and, an absolute value of retardation in thickness direction (Rth) of the color pixels which is represented by following equation (2) is confined to a range of 0-3 nm.Type: ApplicationFiled: October 21, 2010Publication date: April 28, 2011Applicant: TOPPAN PRINTING CO., LTD.Inventors: Mie Shimizu, Takeshi Ikeda, Hidesato Hagiwara, Koichi Minato
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Publication number: 20110096274Abstract: Disclosed is a liquid crystal display device including a liquid crystal cell provided with a color filter, a pair of polarizing plates arranged on both outside surfaces of the liquid crystal cell, and an optical compensation layer disposed inside of each polarizing plate, wherein, when a chromaticity (u, v) represented in CIE1960 color system is measured in a black state of the liquid crystal display device, a color difference ?uv given by equation (1) described below is 0.02 or less in an range of 0<??60: ?uv=[{u(?)?u(?)}2+[{v(?)?v(?)}2]1/2??(1) wherein (u(?), v(?)) is chromaticity as viewed from a vertical direction and (u(?), v(?)) is chromaticity as viewed from a direction inclined at an angle of ? degrees with a direction of a normal line of a display surface.Type: ApplicationFiled: January 3, 2011Publication date: April 28, 2011Applicant: TOPPAN PRINTING CO., LTD.Inventors: Mie Shimizu, Koichi Minato, Yasuhiro Hibayashi, Sohei Kadota
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Publication number: 20100295002Abstract: Disclosed is a color composition for a color filter, which includes at least acrylic resin and a coloring agent. The acrylic resin contains a copolymer formed of a first vinyl monomer having a benzyl group and a second vinyl monomer having a carboxyl group, the copolymer having a weight average molecular weight of 3,000 to 11,000, and an acid value of solid matter of the copolymer being confined to 30 to 85.Type: ApplicationFiled: May 13, 2010Publication date: November 25, 2010Applicants: TOPPAN PRINTING CO., LTD., DIC CORPORATIONInventors: Mie Shimizu, Koichi Minato, Masaharu Takahashi
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Patent number: 7763672Abstract: A red-colored film in which when an elliptically polarized light is incident on the film in a direction 45° aslant from a normal line direction with respect to a surface of the film, a light transmitted through the film has an average amplitude transmittance ratio (av. tan ?) in a wavelength region of 575 to 635 nm, which satisfies the following equation (1): 0.960<av. tan ?<1.040??(1). A red-colored composition contains a red pigment A having a BET specific surface area in the range from 90 to 140 m2/g, a red pigment B having a BET specific surface area in the range from 70 to 85 m2/g, and a pigment carrier formed of a transparent resin, a precursor of the transparent resin or a mixture of the tarns parent resin and precursor thereof. A color filter has the red-colored film as a red color filter segment. The liquid crystal display device includes the color filter.Type: GrantFiled: June 29, 2006Date of Patent: July 27, 2010Assignees: Toyo Ink Mfg. Co., Ltd., Toppan Printing Co., Ltd.Inventors: Masayuki Yamamoto, Akira Hirano, Hideyo Tanaka, Yusuke Iida, Satoshi Ohkuma, Koichi Minato, Takeshi Itoi, Hidesato Hagiwara
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Publication number: 20090321693Abstract: A red colored composition including a pigment, binder resin, monomer, photopolymerization initiator, and organic solvent, wherein the pigment contains a diketopyrrolopyrrol-based red pigment and has an average primary particle diameter of at most 40 nm, and the binder resin contains at least one thermosetting resin of 5 to 12% by weight based on solid content of the composition, the thermosetting resin having a weight-average molecular weight of 25,00 to 20,000.Type: ApplicationFiled: June 25, 2009Publication date: December 31, 2009Applicant: TOPPAN PRINTING CO., LTD.Inventors: Satoshi Ohkuma, Noriko Asahi, Mie Shimizu, Koichi Minato
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Publication number: 20090284697Abstract: A color filter including a transparent substrate, and colored layer having at least a red pixel, green pixel, and blue pixel, and formed on the transparent substrate, wherein the green pixel contains a zinc phthalocyanine halide-based pigment, and has a perpendicular optical retardation Rth(G) satisfying formula Rth(G)>0, Rth(G) representing a product of a thickness of the green pixel and a value obtained by subtracting a refractive index in the thickness wise-direction of the green pixel from an average refractive index in the plane of the green pixel.Type: ApplicationFiled: May 7, 2009Publication date: November 19, 2009Applicant: TOPPAN PRINTING CO., LTD.Inventors: Noriko Asahi, Koichi Minato, Mie Shimizu, Satoshi Ohkuma, Hidesato Hagiwara, Kayo Yoshida