Patents by Inventor Hidesato Hagiwara
Hidesato Hagiwara 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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Patent number: 9285644Abstract: In a substrate for a liquid crystal display device, a black matrix, a transparent electroconductive film and a resin layer are formed above a transparent substrate. The black matrix is a light-shielding layer in which light-shielding pigments are dispersed in a resin, and includes openings. The resin layer is formed above the transparent substrate including the black matrix and the transparent electroconductive film, forms a convex part above the black matrix, and forms, in a region that passes through a center of each of the openings in the black matrix, a concave part.Type: GrantFiled: November 27, 2012Date of Patent: March 15, 2016Assignee: TOPPAN PRINTING CO., LTD.Inventors: Hidesato Hagiwara, Mie Shimizu, Kenzo Fukuyoshi, Takao Taguchi
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Patent number: 9235079Abstract: A color filter substrate for use in a fringe-field switching mode liquid crystal display wherein the color filter substrate and an array substrate provided with a comb-shaped pixel electrode having an electrode width of 10 ?m or less are arranged facing each other with a liquid crystal layer interposed therebetween. The color filter substrate comprises a transparent substrate, a black matrix provided on the transparent substrate, includes an organic pigment as a main coloring agent, color pixels having a relative dielectric constant of 2.9 or more but 4.4 or less, and a transparent resin layer provided on the color pixels. The relative dielectric constant of each of the color pixels falls within ±0.3 of an average relative dielectric constant of the color pixels.Type: GrantFiled: April 25, 2013Date of Patent: January 12, 2016Assignee: TOPPAN PRINTING CO., LTD.Inventors: Nozomi Onaka, Yasuhiro Hibayashi, Hidesato Hagiwara, Kenzo Fukuyoshi
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Patent number: 8867000Abstract: The invention minimizes a disclination of a transflective type liquid crystal display device. The device includes a transparent substrate, a black matrix dividing rectangular pixels, a transparent electroconductive film, a resin layer having a concave region at an each pixel center, and a cell gap adjusting layer formed partially above the resin layer and forming convex regions above the black matrix. The pixels are formed symmetrically to a center and have a transmission region and a reflection region in an order that from a position near the center. In the transmission region, the resin layer is laminated above the transparent electroconductive film. In the reflection region, the resin layer and the cell gap adjusting layer are laminated above the transparent electroconductive film.Type: GrantFiled: December 14, 2012Date of Patent: October 21, 2014Assignee: Toppan Printing Co., Ltd.Inventors: Hidesato Hagiwara, Mie Shimizu, Kenzo Fukuyoshi, Takao Taguchi
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Patent number: 8659724Abstract: A liquid crystal display device includes a first substrate, a second substrate located opposite the first substrate via a liquid crystal, a blue display element, a green display element, a red display element, a short-wavelength optical sensor, a red optical sensor, and an infrared optical sensor formed on a liquid crystal side surface of the first substrate, and a color filter formed between the first substrate and the second substrate and includes a blue filter, a green filter, a first red filter, a short-wavelength transmission filter, a second red filter, and an infrared transmission filter corresponding to the blue display element, the green display element, the red display element, the short-wavelength optical sensor, the red optical sensor, and the infrared optical sensor, respectively.Type: GrantFiled: August 17, 2010Date of Patent: February 25, 2014Assignee: Toppan Printing Co., Ltd.Inventors: Hidesato Hagiwara, Kenzo Fukuyoshi
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Publication number: 20130235311Abstract: A color filter substrate for use in a fringe-field switching mode liquid crystal display wherein the color filter substrate and an array substrate provided with a comb-shaped pixel electrode having an electrode width of 10 ?m or less are arranged facing each other with a liquid crystal layer interposed therebetween. The color filter substrate comprises a transparent substrate, a black matrix provided on the transparent substrate, includes an organic pigment as a main coloring agent, color pixels having a relative dielectric constant of 2.9 or more but 4.4 or less, and a transparent resin layer provided on the color pixels. The relative dielectric constant of each of the color pixels falls within ±0.3 of an average relative dielectric constant of the color pixels.Type: ApplicationFiled: April 25, 2013Publication date: September 12, 2013Applicant: TOPPAN PRINTING CO., LTD.Inventors: Nozomi ONAKA, Yasuhiro Hibayashi, Hidesato Hagiwara, Kenzo Fukuyoshi
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Patent number: 8465886Abstract: 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: GrantFiled: October 21, 2010Date of Patent: June 18, 2013Assignee: Toppan Printing Co., Ltd.Inventors: Mie Shimizu, Takeshi Ikeda, Hidesato Hagiwara, Koichi Minato
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Publication number: 20120287380Abstract: Disclosed is a color filter substrate for a transflective liquid crystal display device, in which a light shielding layer is arranged at a periphery of an effective display region on a transparent substrate, and color pixels of a plurality of colors including green pixels, a spacer, and a first retardation layer are formed in the effective display region, wherein a recess is formed in each of the color pixels, the first retardation layer is formed in the recess, and the first retardation layer has a function for 90 degree polarization rotation of incident light, which has been converted to linearly polarized light, in one passage of the incident light back and forth in a thickness direction of the first retardation layer.Type: ApplicationFiled: July 25, 2012Publication date: November 15, 2012Applicant: TOPPAN PRINTING CO. LTD.Inventors: Hidesato HAGIWARA, Mie Shimizu, Kenzo Fukuyoshi, Takao Taguchi
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Patent number: 8269921Abstract: A liquid crystal display device which includes a backlight device provided with an LED, and a color filter having colored layers of plural colors including a green layer, wherein the green layer of the color filter contains brominated zinc phthalocyanine green pigment and a dielectric loss tangent of the green layer at a driving frequency of a liquid crystal display device is confined to not more than 0.02.Type: GrantFiled: July 7, 2010Date of Patent: September 18, 2012Assignee: Toppan Printing Co., Ltd.Inventors: Satoshi Ohkuma, Atsuko Kamada, Yoshiko Ishimaru, Kenji Muneuchi, Hidesato Hagiwara, Takashi Yamauchi, Noriko Asahi
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Patent number: 8130342Abstract: Disclosed a liquid crystal display device including a backlight device including a white-emitting LED device which emits a white light arising from a color mixture created through a combination of a blue-emitting LED, a red-emitting phosphor and a green-emitting phosphor, and a color filter equipping color pixels exhibiting plural colors including a red pixel and formed on a transparent substrate, wherein the white-emitting LED device is enabled to exhibit an emission spectrum having a first peak wavelength falling within a range of 440-470 nm, a second peak wavelength falling within a range of 510-550 nm and a third peak wavelength falling within a range of 630-670 nm, and a red display chromaticity of the liquid crystal display device is confined within a region bounded by lines connecting four points (0.620, 0.280), (0.620, 0.300), (0.680, 0.315) and (0.680, 0.280) based on an xy chromaticity coordinate system.Type: GrantFiled: February 26, 2010Date of Patent: March 6, 2012Assignees: Toppan Printing Co., Ltd., Nichia CorporationInventors: Yoshiko Ishimaru, Hidesato Hagiwara, Yoshinori Murazaki, Suguru Takashima, Masafumi Harada
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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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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: 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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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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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: 20110043486Abstract: A liquid crystal display device includes a first substrate, a second substrate located opposite the first substrate via a liquid crystal, a blue display element, a green display element, a red display element, a short-wavelength optical sensor, a red optical sensor, and an infrared optical sensor formed on a liquid crystal side surface of the first substrate, and a color filter formed between the first substrate and the second substrate and includes a blue filter, a green filter, a first red filter, a short-wavelength transmission filter, a second red filter, and an infrared transmission filter corresponding to the blue display element, the green display element, the red display element, the short-wavelength optical sensor, the red optical sensor, and the infrared optical sensor, respectively.Type: ApplicationFiled: August 17, 2010Publication date: February 24, 2011Applicant: TOPPAN PRINTING CO., LTD.Inventors: Hidesato Hagiwara, Kenzo Fukuyoshi
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Publication number: 20100296024Abstract: Disclosed a liquid crystal display device including a backlight device including a white-emitting LED device which emits a white light arising from a color mixture created through a combination of a blue-emitting LED, a red-emitting phosphor and a green-emitting phosphor, and a color filter equipping color pixels exhibiting plural colors including a red pixel and formed on a transparent substrate, wherein the white-emitting LED device is enabled to exhibit an emission spectrum having a first peak wavelength falling within a range of 440-470 nm, a second peak wavelength falling within a range of 510-550 nm and a third peak wavelength falling within a range of 630-670 nm, and a red display chromaticity of the liquid crystal display device is confined within a region bounded by lines connecting four points (0.620, 0.280), (0.620, 0.300), (0.680, 0.315) and (0.680, 0.280) based on an xy chromaticity coordinate system.Type: ApplicationFiled: February 26, 2010Publication date: November 25, 2010Applicants: TOPPAN PRINTING CO., LTD., NICHIA CORPORATION,Inventors: Yoshiko Ishimaru, Hidesato Hagiwara, Yoshinori Murazaki, Suguru Takashima, Masafumi Harada
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Publication number: 20100271569Abstract: A liquid crystal display device which includes a backlight device provided with an LED, and a color filter having colored layers of plural colors including a green layer, wherein the green layer of the color filter contains brominated zinc phthalocyanine green pigment and a dielectric loss tangent of the green layer at a driving frequency of a liquid crystal display device is confined to not more than 0.02.Type: ApplicationFiled: July 7, 2010Publication date: October 28, 2010Applicant: TOPPAN PRINTING CO., LTD.Inventors: Satoshi Ohkuma, Atsuko Kamada, Yoshiko Ishimaru, Kenji Muneuchi, Hidesato Hagiwara, Takashi Yamauchi, Noriko Asahi
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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: 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