Patents by Inventor Yasuhiko Yamanaka
Yasuhiko Yamanaka 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: 7215393Abstract: A reflective plate comprises a substrate, a plurality of protrusions each formed on the substrate and having a curved surface, and a reflective film formed on the substrate having the protrusions, wherein a planar shape of each of the protrusions is indefinite, and when a frame line of the planar shape of each of the protrusions is divided into fine line segments, the line segments are pointed in all directions or in predetermined directions. This improves reflective properties such as dispersion properties.Type: GrantFiled: July 30, 2001Date of Patent: May 8, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Mariko Kawaguri, Seiji Nishiyama, Naohide Wakita, Taketoshi Nakao, Yasuhiko Yamanaka, Toshiyasu Oue, Hirofumi Kubota
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Patent number: 6873384Abstract: In a reflector 101 having a concave/convex shape in a surface thereof, at least part of concave portions 4 of the concave/convex shape are arranged according to a predetermined rule and the concave/convex shape of an arbitrary straight-line cross section is irregular.Type: GrantFiled: April 16, 2001Date of Patent: March 29, 2005Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yasuhiko Yamanaka, Yoshihiro Sakurai, Naohide Wakita
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Publication number: 20040021810Abstract: A reflective plate comprises a substrate, a plurality of protrusions each formed on the substrate and having a curved surface, and a reflective film formed on the substrate having the protrusions, wherein a planar shape of each of the protrusions is indefinite, and when a frame line of the planar shape of each of the protrusions is divided into fine line segments, the line segments are pointed in all directions or in predetermined directions. This improves reflective properties such as dispersion properties.Type: ApplicationFiled: February 25, 2003Publication date: February 5, 2004Inventors: Mariko Kawaguri, Seiji Nishiyama, Naohide Wakita, Taketoshi Nakao, Yasuhiko Yamanaka, Toshiyasu Oue, Hirofumi Kubota
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Patent number: 6563557Abstract: In a liquid crystal display device in which a plurality of liquid crystal layers are stacked on a substrate, a method for bonding a film for sealing liquid crystal to supporting members is improved and the fabrication cost is thereby reduced, in order to provide a reflective type liquid crystal display device that achieves a bright display image and causes no parallax problem, and to provide a reducing method of the device. The liquid crystal display device comprises a substrate, a resin film, a multiplicity of columnar supporting members, an adhesive layer, and a liquid crystal layer. The substrate comprises a pixel electrode and a driving element connected to the pixel electrode, both formed on the upper surface of the substrate. The resin film comprises a common electrode provided on the upper surface of the film, and is disposed upwardly with respect to the substrate. The supporting members are provided on the substrate so as to support the resin film.Type: GrantFiled: July 3, 2001Date of Patent: May 13, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yasuhiko Yamanaka, Naohide Wakita, Hiroshi Yamazoe, Takeshi Karasawa, Mariko Kawaguri
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Publication number: 20030053016Abstract: Disclosed is a reflector and a reflective liquid crystal display capable of maintaining high controllability of the shape of the reflective electrode and improving reflection characteristic, only in the step of forming active elements, without a need for special manufacturing steps. In a reflector comprising an active element D and a concave/convex reflective electrode on an insulating substrate, a step-like structure B obtained by cumulating a plurality of column-shaped bodies A1, A2 with width sequentially reduced upwardly. The column-shaped bodies A1, A2 are comprised of one or more layers selected from all layers L1-L2 constituting the active element D and obtained by layer forming and predetermined patterning in the step of manufacturing the active element D.Type: ApplicationFiled: October 15, 2002Publication date: March 20, 2003Inventors: Hirofumi Kubota, Yasuhiko Yamanaka, Naohide Wakita, Seiji Nishiyama
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Publication number: 20030007113Abstract: In a reflector 101 having a concave/convex shape in a surface thereof, at least part of concave portions 4 of the concave/convex shape are arranged according to a predetermined rule and the concave/convex shape of an arbitrary straight-line cross section is irregular.Type: ApplicationFiled: December 14, 2001Publication date: January 9, 2003Inventors: Yasuhiko Yamanaka, Yoshihiro Sakurai, Naohide Wakita
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Publication number: 20020135720Abstract: In a liquid crystal display device in which a plurality of liquid crystal layers are stacked on a substrate, a method for bonding a film for sealing liquid crystal to supporting members is improved and the fabrication cost is thereby reduced, in order to provide a reflective type liquid crystal display device that achieves a bright display image and causes no parallax problem, and to provide a reducing method of the device. The liquid crystal display device comprises a substrate, a resin film, a multiplicity of columnar supporting members, an adhesive layer, and a liquid crystal layer. The substrate comprises a pixel electrode and a driving element connected to the pixel electrode, both formed on the upper surface of the substrate. The resin film comprises a common electrode provided on the upper surface of the film, and is disposed upwardly with respect to the substrate. The supporting members are provided on the substrate so as to support the resin film.Type: ApplicationFiled: July 3, 2001Publication date: September 26, 2002Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Yasuhiko Yamanaka, Naohide Wakita, Hiroshi Yamazoe, Takeshi Karasawa, Mariko Kawaguri
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Patent number: 6452653Abstract: A reflector comprises a substrate provided with a plurality of projecting and depressed structures which are groups of columnar portions each serving as a basic unit and composed of a plurality of minute columnar portions, which are separate from each other or at least partially connected to each other, and with a light reflecting thin film provided over the projecting and depressed structures. This allows incident light to be scattered and reflected in a forward direction or the like, not in the regular reflection direction, and provides a reflector having a superior contrast property and a superior paper-white property, a fabrication method therefor, and a reflective display device comprising the reflector. The reflective display device has a liquid crystal layer provided between a pair of substrates. One of the pair of substrates is provided with projecting and depressed portions covered with a metal film and with a support portion for supporting the counter substrate, which are molded integrally.Type: GrantFiled: July 19, 2000Date of Patent: September 17, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yasuhiko Yamanaka, Naohide Wakita, Takeshi Karasawa, Mariko Kawaguri, Seiji Nishiyama
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Publication number: 20020018161Abstract: A reflector comprises a substrate provided with a plurality of projecting and depressed structures which are groups of columnar portions each serving as a basic unit and composed of a plurality of minute columnar portions, which are separate from each other or at least partially connected to each other, and with a light reflecting thin film provided over the projecting and depressed structures. This allows incident light to be scattered and reflected in a forward direction or the like, not in the regular reflection direction, and provides a reflector having a superior contrast property and a superior paper-white property, a fabrication method therefor, and a reflective display device comprising the reflector. The reflective display device has a liquid crystal layer provided between a pair of substrates. One of the pair of substrates is provided with projecting and depressed portions covered with a metal film and with a support portion for supporting the counter substrate, which are molded integrally.Type: ApplicationFiled: October 9, 2001Publication date: February 14, 2002Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Yasuhiko Yamanaka, Naohide Wakita, Takeshi Karasawa, Mariko Kawaguri, Seiji Nishiyama
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Patent number: 6304309Abstract: In a liquid crystal display device in which a plurality of liquid crystal layers are stacked on a substrate, a method for bonding a film for sealing liquid crystal to supporting members is improved and the fabrication cost is thereby reduced, in order to provide a reflective type liquid crystal display device that achieves a bright display image and causes no parallax problem, and to provide a reducing method of the device. The liquid crystal display device comprises a substrate, a resin film, a multiplicity of columnar supporting members, an adhesive layer, and a liquid crystal layer. The substrate comprises a pixel electrode and a driving element connected to the pixel electrode, both formed on the upper surface of the substrate. The resin film comprises a common electrode provided on the upper surface of the film, and is disposed upwardly with respect to the substrate. The supporting members are provided on the substrate so as to support the resin film.Type: GrantFiled: November 12, 1999Date of Patent: October 16, 2001Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yasuhiko Yamanaka, Naohide Wakita, Hiroshi Yamazoe, Takeshi Karasawa, Mariko Kawaguri
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Patent number: 6224240Abstract: A light source for categorical color perception has major light emitting bands in ranges from 530 to 580 [nm] and from 600 to 650 [nm], with correlated color temperature of the lamp light color in a range from 1700 to 6500 [K] and with DUV (distance from perfect radiator locus on UV coordinates) in a range from 0 to 70, and allows categorical perception of at least red, green, blue, yellow and white of surface colors of an illuminated object.Type: GrantFiled: August 4, 1997Date of Patent: May 1, 2001Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Masanori Shimizu, Yasuhiko Yamanaka, Syouetsu Sakamoto, Tetsuji Takeuchi
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Patent number: 6153971Abstract: A light source for categorical color perception has major light emitting bands in ranges from 530 to 580 and from 600 to 650, with correlated color temperature of the lamp light color in a range from 1700 to 6500 and with DUV (distance from perfect radiator locus on UV coordinates) in a range from 0 to 70, and allows categorical perception of at least red, green, blue, yellow and white of surface colors of an illuminated object.Type: GrantFiled: June 10, 1999Date of Patent: November 28, 2000Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Masanori Shimizu, Yasuhiko Yamanaka, Syouetsu Sakamoto, Tetsuji Takeuchi
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Patent number: 5986729Abstract: An object of the present invention is to provide a liquid crystal display device free from color displacement and having improved contrast ratio as well as an improved aperture ratio. The object is attained by the following structure comprising a substrate having a pixel electrode and a driving element, liquid crystal layers stacked on a substrate, a transparent pixel electrode interposed between the stacked liquid crystal layers, and a driving element provided on the substrate. The transparent pixel electrode is electrically connected to the driving element through an opening formed in a specified region of the liquid crystal layer. Each of the liquid crystal layers is composed of microcapsules each containing a liquid crystal and a binder for binding the microcapsules. An insulating layer is provided between the pixel electrode on the substrate and the liquid crystal layer or between the pixel electrode interposed between the liquid crystal layers and the liquid crystal layer.Type: GrantFiled: July 8, 1997Date of Patent: November 16, 1999Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yasuhiko Yamanaka, Naohide Wakita