Patents by Inventor Yoshihiro Ashizaki
Yoshihiro Ashizaki 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: 8717341Abstract: An image display apparatus is for correcting an input image signal and displaying an image on a display unit based on the corrected image signal, and includes: an illuminance detector for sequentially detecting illuminance values around the apparatus; an illuminance analyzer for sequentially outputting image settings for correction of the image signal depending on the detected illuminance values; a setting selector for outputting an image setting which has been output from the analyzer a number of times greater than a number of times any other image setting has been output, or an image setting determined by the statistic of the image settings output from the analyzer; and a setting application unit for changing the image setting used to correct the image signal to be equal to the image setting output from the selector, when a predetermined change occurs in the input image signal or when a predetermined time has come.Type: GrantFiled: January 26, 2010Date of Patent: May 6, 2014Assignee: Mitsubishi Electric CorporationInventors: Nobuhiko Yamagishi, Yoshitomo Nakamura, Hideki Tanizoe, Yoshihiro Ashizaki
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Patent number: 8405686Abstract: A display device according to the present invention includes a display which is provided on a front surface of the display device and is a display surface on which images are displayed, an illuminance sensor which is provided on a rear surface of the display device and is a first measuring unit measuring illuminance on the rear surface, and a control unit which is a first control unit controlling brightness of the images displayed on the display.Type: GrantFiled: December 30, 2009Date of Patent: March 26, 2013Assignee: Mitsubishi Electric CorporationInventors: Hideki Tanizoe, Yoshihiro Ashizaki, Nobuhiko Yamagishi, Yoshitomo Nakamura
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Patent number: 8253863Abstract: A receiver receives differential analog video signals from a long distance transmission line and converts them into unbalanced analog video signals to output to an analog video signal line that is internal wiring. A frequency response characteristics corrector inside the receiver corrects the frequency response characteristics attenuated mainly by the long distance transmission line, and a delay corrector corrects differences of propagation delay. A transmitter receives the unbalanced analog video signals form the analog video signal line and converts them into balanced differential analog video signals to transmit to a long distance transmission line as differential analog video signals. A video output circuit outputs the unbalanced analog video signals or unbalanced digital video signals to a video signal line as unbalanced video signals.Type: GrantFiled: January 6, 2010Date of Patent: August 28, 2012Assignee: Mitsubishi Electric CorporationInventors: Yoshihiro Ashizaki, Hideki Tanizoe
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Publication number: 20110254819Abstract: An image display apparatus is for correcting an input image signal and displaying an image on a display unit based on the corrected image signal, and includes: an illuminance detector for sequentially detecting illuminance values around the apparatus; an illuminance analyzer for sequentially outputting image settings for correction of the image signal depending on the detected illuminance values; a setting selector for outputting an image setting which has been output from the analyzer a number of times greater than a number of times any other image setting has been output, or an image setting determined by the statistic of the image settings output from the analyzer; and a setting application unit for changing the image setting used to correct the image signal to be equal to the image setting output from the selector, when a predetermined change occurs in the input image signal or when a predetermined time has come.Type: ApplicationFiled: January 26, 2010Publication date: October 20, 2011Inventors: Nobuhiko Yamagishi, Yoshitomo Nakamura, Hideki Tanizoe, Yoshihiro Ashizaki
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Publication number: 20100201716Abstract: A display device according to the present invention includes a display which is provided on a front surface of the display device and is a display surface on which images are displayed, an illuminance sensor which is provided on a rear surface of the display device and is a first measuring unit measuring illuminance on the rear surface, and a control unit which is a first control unit controlling brightness of the images displayed on the display.Type: ApplicationFiled: December 30, 2009Publication date: August 12, 2010Inventors: Hideki Tanizoe, Yoshihiro Ashizaki, Nobuhiko Yamagishi, Yoshitomo Nakamura
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Publication number: 20100201884Abstract: A receiver receives differential analog video signals from a long distance transmission line and converts them into unbalanced analog video signals to output to an analog video signal line that is internal wiring. A frequency response characteristics corrector inside the receiver corrects the frequency response characteristics attenuated mainly by the long distance transmission line, and a delay corrector corrects differences of propagation delay. A transmitter receives the unbalanced analog video signals form the analog video signal line and converts them into balanced differential analog video signals to transmit to a long distance transmission line as differential analog video signals. A video output circuit outputs the unbalanced analog video signals or unbalanced digital video signals to a video signal line as unbalanced video signals.Type: ApplicationFiled: January 6, 2010Publication date: August 12, 2010Inventors: Yoshihiro Ashizaki, Hideki Tanizoe
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Patent number: 7420309Abstract: In a spindle motor in which teeth portions of a stator core formed by laminating magnetic plates are bent in order to increase the number of turns of the stator windings, a gap in the teeth portions between the magnetic plates is avoided and a precise attractive force adjustment becomes possible. The stator core is bent such that its teeth portions faces a surface of a rotor magnet at right angles, and the teeth portions and salient pole arm portions around which windings are wound are substantially parallel to each other. The salient pole arm portions locate approximately halfway between a lower surface of a hub and an upper surface of a base. Further, a thickness of a magnetic plate is set to be 0.5 to 0.9 times that of other portions.Type: GrantFiled: November 29, 2007Date of Patent: September 2, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Akihiko Wakitani, Masahiro Jyono, Takao Yoshitsugu, Yoshihiro Ashizaki
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Publication number: 20080129139Abstract: In a spindle motor in which teeth portions of a stator core formed by laminating magnetic plates are bent in order to increase the number of turns of the stator windings, a gap in the teeth portions between the magnetic plates is avoided and a precise attractive force adjustment becomes possible. The stator core is bent such that its teeth portions faces a surface of a rotor magnet at right angles, and the teeth portions and salient pole arm portions around which windings are wound are substantially parallel to each other. The salient pole arm portions locate approximately halfway between a lower surface of a hub and an upper surface of a base. Further, a thickness of a magnetic plate is set to be 0.5 to 0.9 times that of other portions.Type: ApplicationFiled: November 29, 2007Publication date: June 5, 2008Inventors: Akihiko Wakitani, Masahiro Jyono, Takao Yoshitsugu, Yoshihiro Ashizaki
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Patent number: 7321178Abstract: In a spindle motor in which teeth portions of a stator core formed by laminating magnetic plates are bent in order to increase the number of turns of the stator windings, a gap in the teeth portions between the magnetic plates is avoided and a precise attractive force adjustment becomes possible. The stator core is bent such that its teeth portions faces a surface of a rotor magnet at right angles, and the teeth portions and salient pole arm portions around which windings are wound are substantially parallel to each other. The salient pole arm portions locate approximately halfway between a lower surface of a hub and an upper surface of a base. Further, a thickness of a magnetic plate is set to be 0.5 to 0.9 times that of other portions.Type: GrantFiled: December 5, 2005Date of Patent: January 22, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Akihiko Wakitani, Masahiro Jyono, Takao Yoshitsugu, Yoshihiro Ashizaki
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Patent number: 7284908Abstract: An object of the present invention to provide a hydrodynamic bearing device and a motor having a high performance and reliability which prevents deterioration in a temperature property due to a difference in coefficients of linear expansion of a sleeve and a shaft and prevents abrasion of bearing surfaces of both the sleeve and the shaft. The sleeve is formed of a copper metal material or an iron metal material and is treated with electroless nickel plating at least on the surface which opposes the shaft. The shaft includes 0.2% by weight C, 0.3% by weight Si, 8% by weight Mn, 0.2% by weight S, 2.5% by weight Ni, and 14% by weight Cr, and a main component of the shaft is a manganese alloy steel including Fe.Type: GrantFiled: September 2, 2005Date of Patent: October 23, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Takeyoshi Yamamoto, Yoshihiro Ashizaki
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Publication number: 20070013255Abstract: In a spindle motor in which teeth portions of a stator core formed by laminating magnetic plates are bent in order to increase the number of turns of the stator windings, a gap in the teeth portions between the magnetic plates is avoided and a precise attractive force adjustment becomes possible. The stator core is bent such that its teeth portions faces a surface of a rotor magnet at right angles, and the teeth portions and salient pole arm portions around which windings are wound are substantially parallel to each other. The salient pole arm portions locate approximately halfway between a lower surface of a hub and an upper surface of a base. Further, a thickness of a magnetic plate is set to be 0.5 to 0.9 times that of other portions.Type: ApplicationFiled: December 5, 2005Publication date: January 18, 2007Inventors: Akihiko Wakitani, Masahiro Jyono, Takao Yoshitsugu, Yoshihiro Ashizaki
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Patent number: 7116476Abstract: A Fresnel lens has a plurality of pitch areas in which a plurality of hybrid type prism portions are arranged. Each hybrid type prism portion has a refraction type prism portion and a total reflection type prism portion. In the refraction type prism portion, a ray of incident light Li1 of an incident angle “a” is refracted twice and goes out as a ray of outgoing light Lo1 of an outgoing angle “f”. In the total reflection type prism portion, a ray of incident light Li2 of the incident angle “a” is refracted, totally reflected and refracted in that order and goes out as a ray of outgoing light Lo2 parallel to the ray of outgoing light Lo1.Type: GrantFiled: March 5, 2004Date of Patent: October 3, 2006Assignees: Mitsubishi Denki Kabushiki Kaisha, Dai Nippon Printing Co., Ltd.Inventors: Hiroshi Suzuki, Kohei Teramoto, Yoshihiro Ashizaki, Shinsuke Sikama, Hiroshi Sekiguchi, Tadahiko Ryuugou, Kuniko Kojima
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Publication number: 20060056750Abstract: An object of the present invention to provide a hydrodynamic bearing device and a motor having a high performance and reliability which prevents deterioration in a temperature property due to a difference in coefficients of linear expansion of a sleeve and a shaft and prevents abrasion of bearing surfaces of both the sleeve and the shaft. The sleeve is formed of a copper metal material or an iron metal material and is treated with electroless nickel plating at least on the surface which opposes the shaft. The shaft includes 0.2% by weight C, 0.3% by weight Si, 8% by weight Mn, 0.2% by weight S, 2.5% by weight Ni, and 14% by weight Cr, and a main component of the shaft is a manganese alloy steel including Fe.Type: ApplicationFiled: September 2, 2005Publication date: March 16, 2006Inventors: Takeyoshi Yamamoto, Yoshihiro Ashizaki
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Publication number: 20040169921Abstract: A Fresnel lens has a plurality of pitch areas in which a plurality of hybrid type prism portions are arranged. Each hybrid type prism portion has a refraction type prism portion and a total reflection type prism portion. In the refraction type prism portion, a ray of incident light Li1 of an incident angle “a” is refracted twice and goes out as a ray of outgoing light Lo1 of an outgoing angle “f”. In the total reflection type prism portion, a ray of incident light Li2 of the incident angle “a” is refracted, totally reflected and refracted in that order and goes out as a ray of outgoing light Lo2 parallel to the ray of outgoing light Lo1.Type: ApplicationFiled: March 5, 2004Publication date: September 2, 2004Applicants: Mitsubishi Denki Kabushiki Kaisha, DAI Nippon Printing Co., Ltd.Inventors: Hiroshi Suzuki, Kohei Teramoto, Yoshihiro Ashizaki, Shinsuke Sikama, Hiroshi Sekiguchi, Tadahiko Ryuugou, Kuniko Kojima
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Patent number: 6726859Abstract: A Fresnel lens has a plurality of pitch areas in which a plurality of hybrid type prism portions are arranged. Each hybrid type prism portion has a refraction type prism portion and a total reflection type prism portion. In the refraction type prism portion, a ray of incident light Li1 of an incident angle “an” is refracted twice and goes out as a ray of outgoing light Lo1 of an outgoing angle “f”. In the total reflection type prism portion, a ray of incident light Li2 of the incident angle “a” is refracted, totally reflected and refracted in that order and goes out as a ray of outgoing light Lo2 parallel to the ray of outgoing light Lo1.Type: GrantFiled: May 29, 2002Date of Patent: April 27, 2004Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hiroshi Suzuki, Kohei Teramoto, Yoshihiro Ashizaki, Shinsuke Sikama, Hiroshi Sekiguchi, Tadahiko Ryuugou, Kuniko Kojima
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Publication number: 20030058532Abstract: A Fresnel lens has a pitch including a hybrid prism comprising a refraction prism unit (3A) for emitting an incident light (li1) of an incident angle (a) as an outgoing light (lo1) of an outgoing angle (f) by two refractions, and a total reflection prism unit (4A) for emitting an incident light (li2) of an incident angle (a) as an outgoing light (lo2) parallel to the outgoing light (lo1) by a refraction, a total reflection, and a refraction.Type: ApplicationFiled: May 29, 2002Publication date: March 27, 2003Inventors: Hiroshi Suzuki, Kohei Teramoto, Yoshihiro Ashizaki, Shinsuke Sikama, Hiroshi Sekiguchi, Tadahiko Ryuugou, Kuniko Kojima
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Patent number: 6223027Abstract: An image data transmission system includes mobile transceivers having memories storing image data that is organized in sequential blocks. The mobile transceivers sequentially pass by a stationary transceiver and pause proximate the stationary transceiver. While pausing, a mobile transceiver transmits a block of the image data to the stationary transceiver, which receives and stores the transmitted data. Data transmission is interrupted by movement of the formerly pausing mobile transceiver. The stationary transceiver transmits a pointer signal to a paused mobile transceiver indicating which blocks of image data have been stored in the stationary transceiver so that the mobile transceivers transmit the blocks sequentially until all blocks have been received and stored by the stationary transceiver. The apparatus may be employed in a mass transit system, such as a subway or commuter train, in which the mobile transceivers are mounted in train cars and the stationary transceiver is located at a station.Type: GrantFiled: September 2, 1998Date of Patent: April 24, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Fumitaka Ono, Junichi Sadamatsu, Hitoshi Kubota, Yoshihiro Ashizaki, Koji Kaneko, Akira Kotani, Toshiyuki Takahashi, Yoichi Tenda, Atsushi Tanaka, Kunio Ueda
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Patent number: 4970423Abstract: A stepping motor having a non-touch rotation sensor includes rotor core 5 having magnetic pole teeth of a uniform angular pitch, a stator core 1 having plural magnetic pole teeth groups having magnetic pole teeth of the same angular pitch as the rotor core magnetic pole teeth pitch, and a rotor teeth sensor mounted on the stator core for detecting the rotor magnetic pole teeth and issuing polyphase electric signals.Type: GrantFiled: October 25, 1988Date of Patent: November 13, 1990Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiroaki Tamae, Yoshihiro Ashizaki
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Patent number: 4868485Abstract: A three-phase current output circuit for driving a three-phase brushless motor, the output circuit having a first current source and a second current source with positive temperature coefficients which are provided so as to negate a negative temperature coefficient which causes undesirable reduction of motor torque.Type: GrantFiled: March 1, 1988Date of Patent: September 19, 1989Assignee: Matsushita Electric Industrial Co., Ltd.Inventor: Yoshihiro Ashizaki
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Patent number: 4831344Abstract: According to the present invention, an output transistor on the power supply side Vcc is composed of an NPN type transistor whose base is driven by a PNP type transistor with a diode in its collector-to-emitter path to prohibit its saturation. Another output transistor on the power supply side GND is similarly composed of an NPN type transistor. The above two drive circuits are combined to set up an output circuit for pulse width modulation.Type: GrantFiled: January 6, 1988Date of Patent: May 16, 1989Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshihiro Ashizaki, Kazuyuki Takada