Patents by Inventor Hisakazu Nakamura
Hisakazu Nakamura 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: 7956971Abstract: There is provided a CPA-type liquid crystal display device in which deterioration in display quality due to application of stress to a liquid crystal panel is suppressed. A liquid crystal display device according to the present invention includes a first substrate; a second substrate; and a liquid crystal layer of a vertical-alignment type provided therebetween. In each picture element region, a first electrode provided on a side of the first substrate facing the liquid crystal layer includes a solid portion formed of an electrically-conductive film and a non-solid portion in which no electrically-conductive film is formed. The solid portion includes a plurality of unit solid portions each of which is substantially surrounded by the non-solid portion, the plurality of unit solid portions being arranged at least along a first direction.Type: GrantFiled: May 17, 2005Date of Patent: June 7, 2011Assignee: Sharp Kabushiki KaishaInventors: Hisakazu Nakamura, Masumi Kubo
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Patent number: 7924276Abstract: A liquid crystal panel (2) includes scanning signal lines (31) for supplying scanning signals to gate electrodes (20) of TFTs (14), and data signal lines (32) for supplying data signals to data electrodes (24) of TFTs. The liquid crystal panel further includes auxiliary capacitive electrode pads (27a) for use in forming auxiliary capacitance and an auxiliary capacitive lines (33) so as not to generate a capacitive bond with the scanning signal lines. The liquid crystal panel is driven at a rewriting frequency of a screen of not more than 30 Hz. As a result, the liquid crystal panel can be driven at a low consumption power while maintaining a desirable display quality of the liquid crystal panel.Type: GrantFiled: September 11, 2007Date of Patent: April 12, 2011Assignee: Sharp Kabushiki KaishaInventors: Kazuhiko Tsuda, Masahiro Shimizu, Hisakazu Nakamura, Kouji Kumada, Takashige Ohta, Yutaka Kamezaki, Hitoshi Kamezaki, legal representative, Masano Kamezaki, legal representative
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Publication number: 20100165274Abstract: There is provided a CPA-type liquid crystal display device in which deterioration in display quality due to application of stress to a liquid crystal panel is suppressed. A liquid crystal display device according to the present invention includes a first substrate; a second substrate; and a liquid crystal layer of a vertical-alignment type provided therebetween. In each picture element region, a first electrode provided on a side of the first substrate facing the liquid crystal layer includes a solid portion formed of an electrically-conductive film and a non-solid portion in which no electrically-conductive film is formed. The solid portion includes a plurality of unit solid portions each of which is substantially surrounded by the non-solid portion, the plurality of unit solid portions being arranged at least along a first direction.Type: ApplicationFiled: February 4, 2010Publication date: July 1, 2010Applicant: Sharp Kabushiki KaishaInventors: Hisakazu Nakamura, Masumi Kubo
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Patent number: 7683995Abstract: There is provided a CPA-type liquid crystal display device in which deterioration in display quality due to application of stress to a liquid crystal panel is suppressed. A liquid crystal display device according to the present invention includes a first substrate; a second substrate; and a liquid crystal layer of a vertical-alignment type provided therebetween. In each picture element region, a first electrode provided on a side of the first substrate facing the liquid crystal layer includes a solid portion formed of an electrically-conductive film and a non-solid portion in which no electrically-conductive film is formed. The solid portion includes a plurality of unit solid portions each of which is substantially surrounded by the non-solid portion, the plurality of unit solid portions being arranged at least along a first direction.Type: GrantFiled: May 17, 2005Date of Patent: March 23, 2010Assignee: Sharp Kabushiki KaishaInventors: Hisakazu Nakamura, Masumi Kubo
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Publication number: 20080055218Abstract: A liquid crystal panel (2) includes scanning signal lines (31) for supplying scanning signals to gate electrodes (20) of TFTs (14), and data signal lines (32) for supplying data signals to data electrodes (24) of TFTs. The liquid crystal panel further includes auxiliary capacitive electrode pads (27a) for use in forming auxiliary capacitance and an auxiliary capacitive lines (33) so as not to generate a capacitive bond with the scanning signal lines. The liquid crystal panel is driven at a rewriting frequency of a screen of not more than 30 Hz. As a result, the liquid crystal panel can be driven at a low consumption power while maintaining a desirable display quality of the liquid crystal panel.Type: ApplicationFiled: September 11, 2007Publication date: March 6, 2008Applicant: Sharp Kabushiki KaishaInventors: Kazuhiko Tsuda, Masahiro Shimizu, Hisakazu Nakamura, Kouji Kumada, Takashige Ohta, Yutaka Kamezaki, Hitoshi Kamezaki, Masano Kamezaki
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Patent number: 7321353Abstract: A liquid crystal panel (2) includes scanning signal lines (31) for supplying scanning signals to gate electrodes (20) of TFTs (14), and data signal lines (32) for supplying data signals to data electrodes (24) of TFTs. The liquid crystal panel further includes auxiliary capacitive electrode pads (27a) for use in forming auxiliary capacitance and an auxiliary capacitive lines (33) so as not to generate a capacitive bond with the scanning signal lines. The liquid crystal panel is driven at a rewriting frequency of a screen of not more than 30 Hz. As a result, the liquid crystal panel can be driven at a low consumption power while maintaining a desirable display quality of the liquid crystal panel.Type: GrantFiled: April 24, 2001Date of Patent: January 22, 2008Assignee: Sharp Kabushiki KaishaInventors: Kazuhiko Tsuda, Masahiro Shimizu, Hisakazu Nakamura, Kouji Kumada, Takashige Ohta
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Publication number: 20080013027Abstract: While securing adequate response characteristics and brightness of an orientation-divided vertical alignment type liquid crystal display device, variations in display quality that are ascribable to variations in the pixel structure are suppressed. A liquid crystal display device according to the present invention includes a plurality of pixels each having a first electrode, a second electrode opposing the first electrode, and a vertical-alignment type liquid crystal layer provided between the first electrode and the second electrode, including: a rib provided on the first electrode side of the liquid crystal layer, and a slit provided in the second electrode of the liquid crystal layer. The thickness of the liquid crystal layer is no more than 2.5 ?m, and the width of the rib is no less than 5 ?m and no more than 13 ?m.Type: ApplicationFiled: October 25, 2005Publication date: January 17, 2008Inventors: Tadashi Kawamura, Masumi Kubo, Hiroyuki Ohgami, Hisakazu Nakamura, Akihiro Yamamoto, Takashi Ochi, Yohichi Naruse
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Patent number: 7286108Abstract: A liquid crystal panel (2) includes scanning signal lines (31) for supplying scanning signals to gate electrodes (20) of TFTs (14), and data signal lines (32) for supplying data signals to data electrodes (24) of TFTs. The liquid crystal panel further includes auxiliary capacitive electrode pads (27a) for use in forming auxiliary capacitance and an auxiliary capacitive lines (33) so as not to generate a capacitive bond with the scanning signal lines. The liquid crystal panel is driven at a rewriting frequency of a screen of not more than 30 Hz. As a result, the liquid crystal panel can be driven at a low consumption power while maintaining a desirable display quality of the liquid crystal panel.Type: GrantFiled: May 14, 2004Date of Patent: October 23, 2007Assignee: Sharp Kabushiki KaishaInventors: Kazuhiko Tsuda, Masahiro Shimizu, Hisakazu Nakamura, Kouji Kumada, Takashige Ohta
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Publication number: 20070199504Abstract: There is provided a CPA-type liquid crystal display device in which deterioration in display quality due to application of stress to a liquid crystal panel is suppressed. A liquid crystal display device according to the present invention includes a first substrate; a second substrate; and a liquid crystal layer of a vertical-alignment type provided therebetween. In each picture element region, a first electrode provided on a side of the first substrate facing the liquid crystal layer includes a solid portion formed of an electrically-conductive film and a non-solid portion in which no electrically-conductive film is formed. The solid portion includes a plurality of unit solid portions each of which is substantially surrounded by the non-solid portion, the plurality of unit solid portions being arranged at least along a first direction.Type: ApplicationFiled: May 17, 2005Publication date: August 30, 2007Applicant: SHARP KABUSHIKI KAISHAInventors: Hisakazu Nakamura, Masumi Kubo
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Publication number: 20050219453Abstract: The liquid crystal display device of the invention includes a plurality of pixels each having a first electrode, a second electrode facing the first electrode, and a vertically aligned liquid crystal layer placed between the first and second electrodes. The device further includes stripe-shaped first alignment regulating means having a first width placed in the first electrode side of the liquid crystal layer; stripe-shaped second alignment regulating means having a second width placed in the second electrode side of the liquid crystal layer; and a stripe-shaped liquid crystal region having a third width defined between the first and second regulating means. The third width is in a range between 2 ?m and 15 ?m.Type: ApplicationFiled: March 30, 2005Publication date: October 6, 2005Applicant: SHARP KABUSHIKI KAISHAInventors: Masumi Kubo, Hisakazu Nakamura, Hiroyuki Ohgami, Akihiro Yamamoto, Tadashi Kawamura, Takashi Ochi, Yohichi Naruse
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Publication number: 20050219182Abstract: The liquid crystal display device of the invention includes a plurality of pixels each having a first electrode, a second electrode facing the first electrode, and a vertically aligned liquid crystal layer placed between the first and second electrodes. The device further includes stripe-shaped first alignment regulating means having a first width placed in the first electrode side of the liquid crystal layer; stripe-shaped second alignment regulating means having a second width placed in the second electrode side of the liquid crystal layer; and a stripe-shaped liquid crystal region having a third width defined between the first and second regulating means. The third width is in a range between 7 ?m and 12 ?m.Type: ApplicationFiled: March 30, 2005Publication date: October 6, 2005Applicant: SHARP KABUSHIKI KAISHAInventors: Hisakazu Nakamura, Masumi Kubo, Hiroyuki Ohgami, Tadashi Kawamura, Akihiro Yamamoto, Takashi Ochi, Yohichi Naruse
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Publication number: 20050140663Abstract: An ultrasonic electronic stylus includes at least (i) an ultrasound element for generating ultrasound, (ii) tool force measuring means for measuring a tool force applied to a writing-tip, (iii) a control circuit substrate for controlling the ultrasound element and the tool force measuring means. The ultrasound element, the tool force measuring means, and the control means are arranged in this order from a front-end side on which inputting of data is carried out. Since the ultrasound emitted from the ultrasound element is not blocked by anything, the ultrasound is efficiently transmitted.Type: ApplicationFiled: December 14, 2004Publication date: June 30, 2005Inventor: Hisakazu Nakamura
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Publication number: 20050140632Abstract: A liquid crystal panel (2) includes scanning signal lines (31) for supplying scanning signals to gate electrodes (20) of TFTs (14), and data signal lines (32) for supplying data signals to data electrodes (24) of TFTs. The liquid crystal panel further includes auxiliary capacitive electrode pads (27a) for use in forming auxiliary capacitance and an auxiliary capacitive lines (33) so as not to generate a capacitive bond with the scanning signal lines. The liquid crystal panel is driven at a rewriting frequency of a screen of not more than 30 Hz. As a result, the liquid crystal panel can be driven at a low consumption power while maintaining a desirable display quality of the liquid crystal panel.Type: ApplicationFiled: May 14, 2004Publication date: June 30, 2005Inventors: Kazuhiko Tsuda, Masahiro Shimizu, Hisakazu Nakamura, Kouji Kumada, Takashige Ohta
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Patent number: 6822701Abstract: A liquid crystal display apparatus has an improved repair success rate. In the liquid crystal display apparatus, a pixel electrode is electrically connected to a drain electrode of a thin-film transistor. The drain electrode has a substantial correction site which is narrowed in width. An opening is formed in a certain region of said pixel electrode, overlying the substantial correction site of the drain electrode, the opening being in contact with the outer periphery of the pixel electrode.Type: GrantFiled: September 2, 1999Date of Patent: November 23, 2004Assignee: Sharp Kabushiki KaishaInventors: Touko Kasahara, Hiroshi Shimokawa, Katsumi Irie, Hisakazu Nakamura, Kyoushi Tanaka
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Publication number: 20020180673Abstract: A liquid crystal panel (2) includes scanning signal lines (31) for supplying scanning signals to gate electrodes (20) of TFTs (14), and data signal lines (32) for supplying data signals to data electrodes (24) of TFTs. The liquid crystal panel further includes auxiliary capacitive electrode pads (27a) for use in forming auxiliary capacitance and an auxiliary capacitive lines (33) so as not to generate a capacitive bond with the scanning signal lines. The liquid crystal panel is driven at a rewriting frequency of a screen of not more than 30 Hz. As a result, the liquid crystal panel can be driven at a low consumption power while maintaining a desirable display quality of the liquid crystal panel.Type: ApplicationFiled: May 29, 2001Publication date: December 5, 2002Inventors: Kazuhiho Tsuda, Masahiro Shimizu, Hisakazu Nakamura, Kouji Kumada, Takashige Ohta
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Patent number: 6424399Abstract: A reflection type liquid crystal display apparatus includes: a first substrate having a plurality of reflecting electrodes; a second substrate having a light transmitting electrode; and a liquid crystal layer disposed between the first substrate and the second substrate. The first substrate includes an insulating substrate, a switching device provided on the insulating substrate for supplying a display voltage signal to the reflecting electrode, a drawing-out electrode connected to the switching device and extending under the reflecting electrode, and an insulating resin layer having a contact hole on the drawing-out electrode. The reflecting electrode is provided on the insulating resin layer, corresponding to each pixel, so as to cover the contact hole, and is electrically connected to the drawing-out electrode at the bottom of the contact hole.Type: GrantFiled: May 26, 1999Date of Patent: July 23, 2002Assignee: Sharp Kabushiki KaishaInventors: Yasunori Shimada, Hisakazu Nakamura, Koji Taniguchi
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Patent number: 5973843Abstract: A reflector has a plurality of convex/concave portions on a surface of a substrate, Each of the convex/concave portions has a circular or elliptical shape as viewed in a direction perpendicular to the surface of the substrate. The surface of the substrate includes first and second regions adjacent to each other defining a boundary therebetween. In each of the first and second regions, an ellipticity .alpha. of the shape of the convex/concave portions continuously changes away from a respective predetermined central position. The ellipticity .alpha. is about 1.05+(0.005/3)-.beta. or less, where .beta.=.vertline..theta.-90.vertline., and .theta. denotes an angle between long axes of the elliptical shapes of the convex/concave portions on opposite sides of the boundary.Type: GrantFiled: December 4, 1998Date of Patent: October 26, 1999Inventor: Hisakazu Nakamura
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Patent number: 5949507Abstract: A reflection type liquid crystal display apparatus includes: a first substrate having a plurality of reflecting electrodes; a second substrate having a light transmitting electrode; and a liquid crystal layer disposed between the first substrate and the second substrate. The first substrate includes an insulating substrate, a switching device provided on the insulating substrate for supplying a display voltage signal to the reflecting electrode, a drawing-out electrode connected to the switching device and extending under the reflecting electrode, and an insulating resin layer having a contact hole on the drawing-out electrode. The reflecting electrode is provided on the insulating resin layer, corresponding to each pixel, so as to cover the contact hole, and is electrically connected to the drawing-out electrode at the bottom of the contact hole.Type: GrantFiled: November 27, 1996Date of Patent: September 7, 1999Assignee: Sharp Kabushiki KaishaInventors: Yasunori Shimada, Hisakazu Nakamura, Koji Taniguchi
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Patent number: 5691791Abstract: A reflective liquid crystal display device including a first substrate and a second substrate, a liquid crystal layer interposed between the first and second substrates, a polarizing plate, and a reflection layer; wherein the polarizing plate and the reflection layer are located on opposite sides of the liquid crystal layer. A surface of the reflection layer reflecting light has projections, and an occupation of an area of portions where a tilt angle of a tangent line drawn against a profile of the surface with the projections is less than 2.degree. in a total area of the surface is in a range of 20% to 60%.Type: GrantFiled: May 13, 1996Date of Patent: November 25, 1997Assignee: Sharp Kabushiki KaishaInventors: Kozo Nakamura, Hisakazu Nakamura, Seiichi Mitsui, Naofumi Kimura, Kazuhiko Tsuda
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Patent number: 5418635Abstract: A reflective substrate is provided, in which an electrode made of a material having an optical reflecting function is provided above an insulating base substrate and an upper surface of the electrode has a continuous wave shape without any flat portions. A method for manufacturing the reflective substrate includes the steps of: forming a plurality of convex portions with two or more different heights in a region where the electrode is provided; forming a polymer resin film, which has an upper surface in a continuous wave shape without any flat portions, on the substrate with the convex portions; and forming the electrode made of a material having an optical reflecting function on the polymer resin film so that the electrode has a continuous wave shape.Type: GrantFiled: February 18, 1993Date of Patent: May 23, 1995Assignee: Sharp Kabushiki KaishaInventors: Seiichi Mitsui, Hisakazu Nakamura, Yasunori Shimada, Koji Taniguchi, Hirohisa Tanaka, Naofumi Kimura