Patents by Inventor Yasuyuki Kudo
Yasuyuki Kudo 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: 8072436Abstract: A touch sensor (3) comprises a plurality of X-coordinate electrodes, a plurality of Y-coordinate electrodes placed crossing the X-coordinate electrodes with an insulating layer therebetween, a plurality of X-coordinate auxiliary electrodes which are extended from X-coordinate electrodes, and a plurality of Y-coordinate auxiliary electrodes which are extended from Y-coordinate electrodes, the plurality of X and Y-coordinate electrodes being placed in a two-dimensional matrix form on a display surface of a display device (1) for detecting a change of capacitance due to pressing. A detection circuit (4) which detects a change in capacitance of the touch sensor (3), an analog-to-digital converter (5) which converts a detection output of the detection circuit (4) into digital data, a touch panel control circuit (6) which determines a touched coordinate, and a primary control circuit (7) which receives input of touch coordinate data from the touch panel control circuit (6) are provided.Type: GrantFiled: July 9, 2009Date of Patent: December 6, 2011Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Takuya Eriguchi, Yasuyuki Kudo, Norio Mamba, Tsutomu Furuhashi, Hideo Sato
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Patent number: 8059229Abstract: A light control element capable of controlling deflection of light output through a light guide plate to a desired output viewing angle is provided. A light control element (prism sheet) has a plane of incidence on one surface thereof, and a plane of output on the other surface thereof. The plane of incidence is formed as having thereon a number of prism portions arrayed in parallel. Each of the prism portions has a first prism surface allowing incidence of light, and a second prism surface where the light entering through the first prism surface is reflected by total reflection on the inner side. The second prism surface has an outwardly-swelled curved profile, formed with a curvature that allows the light to output through the plane of output at a second output viewing angle wider than a first output viewing angle of a case where the second prism surface is flat.Type: GrantFiled: January 17, 2008Date of Patent: November 15, 2011Assignee: Sony CorporationInventors: Shogo Shinkai, Yasuyuki Kudo, Makoto Aoki, Kiyohiro Kimura, Katsuhiro Doi
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Publication number: 20110242139Abstract: The display driver achieves the balance between the image quality and power-cutting ratio by controlling the backlight dimming ratio to keep the image quality after backlight dimming constant. The display driver uses e.g. MSE (Mean Square Error) as an index of image quality. The reference gradation control unit controls the data decompression and backlight dimming ratios, thereby to keep the image quality after backlight dimming constant. Assuming display data decompression, and backlight dimming, the error calculating unit calculates a decrease of luminance for an input displayed image as MSE based on the decompression and dimming ratios of a preceding frame, in advance. In the case of MSE over a predetermined value, the decompression unit and light-adjustment control unit decrease the decompression and dimming ratios to below those of the preceding frame, respectively. In the case of MSE below the value, the ratios are lowered to below those of the preceding frame.Type: ApplicationFiled: March 31, 2010Publication date: October 6, 2011Inventors: Goki Toshima, Yasuyuki Kudo, Yoshiki Kurokawa, Akihito Akai
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Patent number: 8016450Abstract: An illuminating apparatus is provided and includes a plurality of point light sources in one plane and a first optical sheet and a second optical sheet overlapped in a region facing the plurality of point light sources. The plurality of point light sources are arranged in a first direction and also arranged in a second direction orthogonal to the first direction. The first optical sheet has a plurality of first three-dimensional structures extending in a direction parallel to the first direction and arranged in a direction parallel to the second direction. The second optical sheet has a plurality of second three-dimensional structures extending in a direction parallel to the second direction and arranged in a direction parallel to the first direction. Each of the second three-dimensional structures has a shape which generates a larger amount of return light from normal incident light as compared with the first three-dimensional structures.Type: GrantFiled: August 11, 2009Date of Patent: September 13, 2011Assignee: Sony CorporationInventors: Shogo Shinkai, Shigehiro Yamakita, Yasuyuki Kudo, Taku Ishimori, Eiji Ohta, Yutaka Muramoto
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Publication number: 20110205734Abstract: An optical sheet stack body includes two optical sheets disposed to overlap a plurality of point light sources arranged in a first direction and arranged in a second direction crossing the first direction. The optical sheets are disposed so that a long-side direction of the optical sheet crosses the first and second directions at an angle other than right angle. A first optical sheet disposed on the point light source side has a plurality of first three-dimensional structures extending in a direction parallel to or almost parallel to the first direction. A second optical sheet disposed on the side opposite to the point light source has a plurality of second three-dimensional structures extending in a direction parallel to or almost parallel to the second direction. The second three-dimensional structure has a shape by which return light is generated from normal incident light more than the first three-dimensional structure.Type: ApplicationFiled: February 17, 2011Publication date: August 25, 2011Applicant: SONY CORPORATIONInventors: Shigehiro Yamakita, Shogo Shinkai, Yasuyuki Kudo, Taku Ishimori, Eiji Ohta, Yutaka Muramoto
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Publication number: 20110148953Abstract: A display driver having a first mode where a number of colors to be displayed is smaller than a predetermined number and a second mode where a number of colors to be displayed is equal to or larger than the predetermined number. A generation circuit generates gray scale voltages having a plurality of levels for positive polarity and negative polarity. In the first mode, the generation circuit decreases a current flowing into an internal circuit which generates a gray scale voltage of an intermediate level other than two gray scale voltages of a lowest and a highest level, in comparison to a current flowing in the second mode. In the first mode, the selection circuit selects a gray scale voltage in accordance with the display data, from the two gray scale voltages of the lowest and the highest level gray scale voltage which are generated from the generation circuit.Type: ApplicationFiled: March 1, 2011Publication date: June 23, 2011Inventors: Yasuyuki KUDO, Akihito AKAI, Kazuo OOKADO, Kazunari KUROKAWA, Atsuhiro HIGA
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Patent number: 7961278Abstract: There is provided an optical sheet stack which includes a first optical sheet having a large number of irregularities consecutively arranged on one surface thereof, and a second optical sheet stacked thereon. In the optical sheet stack, the second optical sheet has, on a bonding surface thereof, an adhesive layer bonded with apexes of the irregularities, and while assuming pitch of arrangement of the irregularities as P, and width of bonding of each apex of the irregularities bonded to the adhesive layer as Pw, the relation of 0<Pw/P?0.2 is satisfied.Type: GrantFiled: November 7, 2007Date of Patent: June 14, 2011Assignee: Sony CorporationInventors: Eiji Ohta, Toru Abiko, Yasuyuki Kudo, Shogo Shinkai, Shigehiro Yamakita, Makoto Aoki
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Patent number: 7952554Abstract: In a liquid crystal driver of a liquid crystal display having a structure to switch between image data for partial display from a partial memory and non-display (background pattern), changes in a partial-display area are detected according to a setting command of the partial-display area, and a mask switch is controlled so as to select the background pattern. Timing to write to the last line of the changed partial-display area in the partial memory is determined by an address counter for controlling the partial memory, and the mask switch is controlled so as to select the image data of the partial memory from a next frame.Type: GrantFiled: May 16, 2007Date of Patent: May 31, 2011Assignee: Renesas Electronics CorporationInventors: Hiroki Awakura, Yasuyuki Kudo, Takashi Shoji, Shigeru Ota
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Patent number: 7944439Abstract: A display device includes first and second voltage generation circuits each including a voltage circuit for outputting an internal voltage on the basis of a plurality of clocks, a sampling circuit for sampling an output signal from the voltage circuit, a monitoring circuit for comparing an output signal from the first sampling circuit with a predetermined voltage range and outputting a result, and a power supply generation circuit for generating a power supply voltage to be input to the voltage circuit on the basis of an output signal supplied from the monitoring circuit. The voltage circuit in the first voltage generation circuit is controlled on the basis of a level of the power supply voltage, and the voltage circuit in the second voltage generation circuit is controlled on the basis of periods of the clocks.Type: GrantFiled: June 8, 2006Date of Patent: May 17, 2011Assignee: Hitachi Displays, Ltd.Inventors: Norio Mamba, Yasuyuki Kudo, Toshio Miyazawa
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Patent number: 7924252Abstract: In consideration of the current leakage path of a liquid crystal panel and a signal line voltage fluctuation due to the current leakage path, a ? adjusting function (second driving method) is applied for each divided period in the first driving method. In a signal line driving unit, a gray scale voltage obtained by adding or subtracting a voltage fluctuation value different in each of the output periods of each gray scale is generated, and a gray scale voltage taking the voltage fluctuation value into consideration is applied to a signal line.Type: GrantFiled: May 31, 2006Date of Patent: April 12, 2011Assignee: Renesas Electronics CorporationInventors: Akihito Akai, Yasuyuki Kudo, Takuya Eriguchi, Kazuo Okado
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Patent number: 7901600Abstract: A lens film with small warpage even when a transparent base is thin is provided. Pole prisms made of a hardening resin are arranged along the extending direction on a transparent base made of a flexible material. The transparent base has a depression according to a valley between the pole prisms adjacent to each other. The pole prism has a sloping face extending to an inner wall of the depression. The transparent base is in contact with the valley. A layer not functioning as a prism, that is, a so-called skirt layer does not exist between the transparent base and the pole prisms.Type: GrantFiled: April 8, 2008Date of Patent: March 8, 2011Assignee: Sony CorporationInventors: Kiyohiro Kimura, Jun Sasaki, Makoto Aoki, Yasuyuki Kudo, Mariko Fukuda, Yu Andrew Chakchung
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Patent number: 7898555Abstract: A generation circuit generates gray scale voltages having a plurality of levels for positive polarity and gray scale voltages having a plurality of levels for negative polarity; wherein said generation circuit, in the mode in which the number of colors to be displayed on a display panel is small, decreases a current flowing into an internal circuit which generates a gray scale voltage of an intermediate level other than two gray scale voltages of a gray scale voltage of the most lowest level and a gray scale voltage of the most highest level among the gray scale voltages of said plurality of levels, in comparison to a current flowing in the other mode; and wherein said selection circuit, in the mode in which the number of colors to be displayed on said display panel is small, selects said gray scale voltage according to said display data, from the two gray scale voltages of said most lowest level gray scale voltage and said most highest level gray scale voltage which are generated from said generation circuitType: GrantFiled: July 11, 2007Date of Patent: March 1, 2011Assignee: Hitachi, Ltd.Inventors: Yasuyuki Kudo, Akihito Akai, Kazuo Ookado, Kazunari Kurokawa, Atsuhiro Higa
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Publication number: 20110026240Abstract: An optical element laminate is provided which, while an increase in thickness of a liquid crystal display device is suppressed, improves insufficient rigidity of an optical element and, in addition, which does not degrade display characteristics of the liquid crystal display device. The optical element laminate includes a plate-shaped support member having a first primary surface and a second primary surface and an optical element which is laminated on at least one of the first primary surface and the second primary surface of the support member and, in addition, which has a film shape or a sheet shape. The periphery of the laminated optical element is at least bonded to facing two sides of the support member, the optical element and the support member are placed in close contact with each other, and a thickness t of the support member, a length L of the support member, and a tensile force F of the optical element satisfy the relational expression of 0?F?1.Type: ApplicationFiled: September 18, 2009Publication date: February 3, 2011Applicant: SONY CORPORATIONInventors: Hiroshi Hayashi, Eiji Ohta, Ken Hosoya, Yasuyuki Kudo, Shigehiro Yamakita, Masayasu Kakinuma, Taku Ishimori, Shogo Shinkai, Yoshiyuki Maekawa, Masami Miyake, Yohei Kanno, Fumiko Sasaki, Akihiro Horii
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Patent number: 7880970Abstract: An optical packaged body capable of preventing generation of a wrinkle, deflection, and warpage, and capable of being thinned is provided. The optical packaged body includes a support medium and a packaging film that covers the support medium in a state of being applied with shrinkage force. The packaging film has an optical function section that acts on light from a light source in at least one of a first region into which the light from the light source enters and a second region from which the light from the light source is emitted after passing through the optical packaged body when the light source is arranged on one face side of the optical packaged body.Type: GrantFiled: November 19, 2009Date of Patent: February 1, 2011Assignee: Sony CorporationInventors: Eiji Ohta, Toru Abiko, Yasuyuki Kudo, Hirokazu Odagiri, Satoshi Sato, Yu Andrew Chakchung, Shogo Shinkai, Taro Omura, Hiroshi Mizuno, Akihiro Horii, Tatsuya Harima
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Publication number: 20100328575Abstract: A diffusion plate includes a base body including a plurality of convex portions formed on a principal surface of the base body. An angle of inclination of the convex portions at a base of the convex portions ranges from 38° to 42°. Also, a ratio R/Cp between a curvature R of a summit of the convex portions and a pitch Cp between adjacent convex portions is 0.0014<R/Cp<0.43.Type: ApplicationFiled: June 17, 2010Publication date: December 30, 2010Applicant: SONY CORPORATIONInventors: Shogo Shinkai, Eiji Ohta, Yasuyuki Kudo, Tatsuya Harima, Saori Hayashi
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Patent number: 7852358Abstract: A display device for displaying display data includes a display panel having pixel sections in a matrix form, a scanning circuit which selects a line of the pixel sections, a generation circuit which generates a plurality of gray-scale voltages based on a reference voltage, and a selection circuit which selects a gray-scale voltage corresponding to the display data from the plurality of gray-scale voltages, and outputs the gray-scale voltage thus selected to a pixel section of the display panel. The generation circuit one of increases and decreases a steady-state current of the generation circuit at a second period within one scanning period of the scanning circuit.Type: GrantFiled: December 12, 2006Date of Patent: December 14, 2010Assignee: Hitachi, Ltd.Inventors: Yasuyuki Kudo, Atsuhiro Higa, Yoshikazu Yokota, Hiroshi Kurihara, Kazunari Kurokawa
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Publication number: 20100309411Abstract: A diffusion sheet includes: a substrate having a first principal surface and a second principal surface; and structures each in a convex shape formed randomly on the first principal surface or the second principal surface of the substrate. The structures have an identical or almost identical height. The structures have an aspect ratio h/r, where r denotes an average radius of the structures and h denotes an average height of the structures, of more than 0.85 and not more than 1.50. The structures have a filling factor of not less than 60% and not more than 80%.Type: ApplicationFiled: May 24, 2010Publication date: December 9, 2010Applicant: SONY CORPORATIONInventors: Akihiro Shibata, Jun Sasaki, Hirofumi Tsuiki, Akihiro Horii, Noriyuki Hirai, Hiroshi Mizuno, Satoko Asaoka, Kanako Hashimoto, Yasuyuki Kudo, Saori Hayashi, Teiichi Miyauchi, Satoshi Sekino, Makoto Aoki
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Patent number: 7796109Abstract: A voltage level converter for driving resistive and capacitive loads of a display device includes a charge circuit having a capacitance, a transistor NMOS1, a capacitance, and a transistor; a discharge circuit having transistors; and a reset signal generating circuit provided in a preceding stage of the discharge circuit. A signal having an inverted phase to an input pulse is applied to the reset signal generating circuit. An output of the reset signal generating circuit is supplied to gate terminals of the transistors, thus realizing reliable turning ON or OFF the discharge circuit.Type: GrantFiled: May 31, 2006Date of Patent: September 14, 2010Assignee: Hitachi Displays, Ltd.Inventors: Norio Mamba, Toshio Miyazawa, Yasuyuki Kudo
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Publication number: 20100214509Abstract: A light guide plate includes a light-emitting surface, a light-reflecting surface opposed to the light-emitting surface, and a light-incident surface including a protrusion formed continuously along an edge portion of the light-emitting surface. Accordingly, light that has entered the protrusion is transmitted through the protrusion and totally reflected on an inner surface of the light-emitting surface to thus propagate inside the light guide plate. As described above, since incident light components emitted toward an upper portion of the light-incident surface can be effectively blocked by the protrusion, luminance distribution characteristics as well as a light use efficiency can be improved. The light guide plate is produced by a punching press process.Type: ApplicationFiled: February 6, 2009Publication date: August 26, 2010Applicant: SONY CORPORATIONInventors: Jun Sasaki, Yasuyuki Kudo, Makoto Aoki, Yosihide Nagata, Mariko Fukuda, Masahiro Ochiai
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Publication number: 20100195314Abstract: An illuminating device capable of decreasing not only in-plane luminance unevenness in the front face direction but also in-plane luminance unevenness when viewed from a diagonal direction is provided.Type: ApplicationFiled: May 20, 2009Publication date: August 5, 2010Applicant: SONY CORPORATIONInventors: Shogo Shinkai, Shigehiro Yamakita, Hirokazu Odagiri, Yasuyuki Kudo