Patents by Inventor Mikio Shiraishi
Mikio Shiraishi 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: 7519746Abstract: An output of a first ring counter is held in a first storage circuit. Outputs of a second ring counter and the first storage circuit are input to a first AND circuit group. An output of a third ring counter and an output of the first storage circuit are input to a second AND circuit group. Outputs of the first AND circuit group are input to a first OR circuit. Outputs of the second AND circuit group are input to a second OR circuit. An output of the first OR circuit is stored in a second storage circuit. An output of the second OR circuit is stored in a third storage circuit. Outputs of the first and second OR circuits and outputs of the second and third storage circuits are supplied to a decode circuit, and are decoded to output an overflow signal and an underflow signal.Type: GrantFiled: August 22, 2005Date of Patent: April 14, 2009Assignee: Kabushiki Kaisha ToshibaInventor: Mikio Shiraishi
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Publication number: 20090086868Abstract: A clock data recovery circuit which reproduces clock contained in data sequence from data sequence which is serially input includes a digital control oscillator outputting reproduced clock whose frequency is controlled according to a control signal. A phase comparator compares a phase of the data sequence and a phase of the reproduced clock. A digital control circuit produces the control signal in accordance with an output of the phase comparator, first control information indicating a first period for which the frequency of the reproduced clock is changed, and a second control information indicating a number of steps by which the frequency of the reproduced clock is changed.Type: ApplicationFiled: September 17, 2008Publication date: April 2, 2009Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Mikio Shiraishi, Takuma Aoyama
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Publication number: 20090059180Abstract: A projection type display apparatus includes a housing having a first side on which an air intake opening is arranged and a second side on which an air exhaust opening is arranged, a light source for supplying light, and a light valve device which modulates the light output from the light source. A first fan is provided which draws air from the air intake opening into the housing, and a first ventilation path is coupled with the air intake opening so as to lead air flow from the air intake opening toward a lower portion of the light valve. A second ventilation path is formed from the lower portion of the light valve to an upper portion of the light valve, and a second fan is provided which draws out air flowing from the second ventilation path through the air exhaust opening to outside of the housing.Type: ApplicationFiled: October 17, 2008Publication date: March 5, 2009Inventors: Kenji Fuse, Mikio Shiraishi, Yasuo Otsuka, Nobuyuki Kaku, Hidehiro Ikeda
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Patent number: 7441904Abstract: A projection type display apparatus includes a housing having a first side on which an air intake opening is arranged and a second side on which an air exhaust opening is arranged, a light source for supplying light, and a light valve device which modulates the light output from the light source. A first fan is provided which draws air from the air intake opening into the housing, and a first ventilation path is coupled with the air intake opening so as to lead air flow from the air intake opening toward a lower portion of the light valve. A second ventilation path is formed from the lower portion of the light valve to an upper portion of the light valve, and a second fan is provided which draws out air flowing from the second ventilation path through the air exhaust opening to outside of the housing.Type: GrantFiled: January 30, 2007Date of Patent: October 28, 2008Assignee: Hitachi, Ltd.Inventors: Kenji Fuse, Mikio Shiraishi, Yasuo Otsuka, Nobuyuki Kaku, Hidehiro Ikeda
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Patent number: 7359474Abstract: There is provided a clock-recovering filter circuit for use in a clock recovery circuit that generates a recovery clock signal from input data from an external device and a reference clock signal. The filter circuit includes: a pulse-inserting circuit which inserts pulses in a first phase-advancing signal or a first phase-delaying signal, thereby generating a second phase-advancing signal or a second phase-delaying signal; and a frequency-offset detecting circuit which detects frequency-offset data from the second phase-advancing signal and the second phase-delaying signal, the frequency-offset data representing a frequency difference between the recovery clock signal and the reference clock signal. The pulse-inserting circuit inserts pulses in accordance with the frequency-offset data when the first phase-advancing signal or the first phase-delaying signal is not input.Type: GrantFiled: August 4, 2004Date of Patent: April 15, 2008Assignee: Kabushiki Kaisha ToshibaInventor: Mikio Shiraishi
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Patent number: 7341354Abstract: A display apparatus includes a light source, and a partition wall which divides an inside of the display apparatus into an enclosing space which includes a plurality of optical elements and an outer space with respect to the enclosing space. The optical elements includes a color separator which receives a light from the light source and emits a plurality of separate color beams, at least one reflecting type light valve which forms an image by reflecting the plurality of color beams, and a projection lens which projects the image of an external screen. A first cooling fan is provided which causes an air flow in the outer space. A least one of the optical elements forms a part of the partition wall, and the air flow cools the at least one reflecting type light valve from the outer space.Type: GrantFiled: October 30, 2006Date of Patent: March 11, 2008Assignee: Hitachi, Ltd.Inventors: Mikio Shiraishi, Yasuo Ohtsuka, Kenji Fuse, Toru Numata
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Patent number: 7293878Abstract: A projector having an image display element for modulating light on the basis of an image signal and a projection lens for projecting light emitted from the image display element on a screen, includes: a lamp which has a light emitting source for emitting light; a reflector which reflects light emitted from the light emitting source; a cover glass which covers an emission surface of light from the reflector; a cooling fan disposed outside the reflector; and an air direction changing unit which changes a direction of cooling air caused by the cooling fan. The air direction changing unit is disposed within a space surrounded by the reflector and the cover glass, and outside an emitted light path of light reflected by the reflector. Cooling air within the space is exhausted outside the projector through the cooling fan.Type: GrantFiled: October 15, 2004Date of Patent: November 13, 2007Assignee: Hitachi, Ltd.Inventors: Tatsuo Morita, Mikio Shiraishi, Tetsuki Nishimura, Hideki Okuyama
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Publication number: 20070216670Abstract: The present invention ensures the efficient radiation of heat of a flat display panel without increasing a space outside a display screen of the flat display panel. A periphery of a reinforcing member adhered to a back surface of the flat display panel is folded in an L-shape and a driver IC is brought into contact with the folded portion.Type: ApplicationFiled: March 14, 2007Publication date: September 20, 2007Inventors: Yasuharu Yatsu, Atsuo Osawa, Mikio Shiraishi, Yoshie Kodera, Tetsu Ohishi
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Publication number: 20070153458Abstract: According to the present invention, the amount of usage of a heat conductive member for fixing a self-luminous flat display panel to a metallic chassis member disposed at the back of the display panel is reduced in the thickness direction as well as in the surface direction. The invention further provides a technique for efficiently radiating heat from the display panel, suppressing cost increase. To this end, in the invention, the heat conductive member is a hot-melt adhesive having adhesion at room temperature and filled with a heat conduction imparting agent, and the display panel is fixed to the chassis member by a plurality of heat conducting sections of the heat conductive member formed discretely ranging from 0.3 to 0.8 mm in thickness.Type: ApplicationFiled: December 19, 2006Publication date: July 5, 2007Inventors: Mitsuo Okimoto, Mikio Shiraishi, Takaaki Matono, Yoshie Kodera, Toshihiko Matsuzawa, Sadayuki Nishimura, Nobuo Masuoka
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Patent number: 7232225Abstract: A cooling system for an area around a lamp that accounts for a good part of an amount of heat generated by the projection type display device is isolated from a cooling system for other parts including a liquid crystal panel. Means is further provided of allowing the directions of intake and exhaust to be inverted in an entire device by changing the direction of rotation of an exhaust fan provided for the cooling system for the area around the lamp between forward and backward.Type: GrantFiled: February 7, 2006Date of Patent: June 19, 2007Assignee: Hitachi, Ltd.Inventor: Mikio Shiraishi
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Publication number: 20070121082Abstract: A projection type display apparatus includes a housing having a first side on which an air intake opening is arranged and a second side on which an air exhaust opening is arranged, a light source for supplying light, and a light valve device which modulates the light output from the light source. A first fan is provided which draws air from the air intake opening into the housing, and a first ventilation path is coupled with the air intake opening so as to lead air flow from the air intake opening toward a lower portion of the light valve. A second ventilation path is formed from the lower portion of the light valve to an upper portion of the light valve, and a second fan is provided which draws out air flowing from the second ventilation path through the air exhaust opening to outside of the housing.Type: ApplicationFiled: January 30, 2007Publication date: May 31, 2007Inventors: Kenji Fuse, Mikio Shiraishi, Yasuo Otsuka, Nobuyuki Kaku, Hidehiro Ikeda
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Publication number: 20070085776Abstract: An electron emission type display apparatus has on a flat plane a matrix layout of multiple light-emitting elements which are connected to cross-points of longitudinal and lateral common electrodes, for sequentially turning on a line of light-emitting elements connected to a common electrode. In such the device, distortion takes place in drive waveform since a low-pass filter (LPF) is formed by a combination of the wiring resistance of the common electrode and the capacitance of a light-emitting element. To avoid such waveform distortion, the width of a light-emitting element driving voltage pulse is caused to be greater than the width of a scan voltage pulse.Type: ApplicationFiled: September 19, 2006Publication date: April 19, 2007Inventors: Mikio Shiraishi, Eiji Miwa, Toshiyuki Kurita, Katsumi Ashizawa
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Publication number: 20070040994Abstract: A display apparatus includes a light source, and a partition wall which divides an inside of the display apparatus into an enclosing space which includes a plurality of optical elements and an outer space with respect to the enclosing space. The optical elements includes a color separator which receives a light from the light source and emits a plurality of separate color beams, at least one reflecting type light valve which forms an image by reflecting the plurality of color beams, and a projection lens which projects the image of an external screen. A first cooling fan is provided which causes an air flow in the outer space. A least one of the optical elements forms a part of the partition wall, and the air flow cools the at least one reflecting type light valve from the outer space.Type: ApplicationFiled: October 30, 2006Publication date: February 22, 2007Inventors: Mikio Shiraishi, Yasuo Ohtsuka, Kenji Fuse, Toru Numata
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Patent number: 7175284Abstract: A projection type display apparatus includes a housing having a first side having an air intake opening and a second side having an air exhaust opening, a light source for supplying light, and a light valve device which modulates the light output from the light source. A centrifugal fan is associated with the air intake opening so as to draw air from the air intake opening. A first ventilation path is coupled with the air intake opening so as to lead air flow from the air intake opening toward a lower portion of the light valve, and a second ventilation path is formed from the lower portion of the light valve to an upper portion of the light valve. An exhaust fan is associated with the air exhaust opening so as to draw out air flowing from the second ventilation path through the air exhaust opening.Type: GrantFiled: March 22, 2006Date of Patent: February 13, 2007Assignee: Hitachi, Ltd.Inventors: Kenji Fuse, Mikio Shiraishi, Yasuo Otsuka, Nobuyuki Kaku, Hidehiro Ikeda
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Patent number: 7140732Abstract: A projection type image display device superior in reliability and also superior in both repairability and maintainability is to be provided at a low cost. Support members disposed between liquid crystal panels and a prism are made of a thermoplastic polymer material, and the liquid crystal panels and the support members are fixed to each other by heat-fusion of the support members. When it is necessary to remove a liquid crystal panel which is at fault for example from the corresponding support member, the fused portion on the support member side which less expensive is cut off, thereby permitting the liquid crystal panel which is expensive to be taken out re-utilizably without any damage thereto.Type: GrantFiled: March 24, 2004Date of Patent: November 28, 2006Assignee: Hitachi, Ltd.Inventors: Mikio Shiraishi, Fusamitsu Tsubata, Hiroshi Oshima, Michiyuki Yoshino, Yoshimasa Takeuchi, Tatsumi Hasebe
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Patent number: 7128422Abstract: A display apparatus includes a light source, and a partition wall which divides an inside of the display apparatus into an enclosing space which includes a plurality of optical elements and an outer space with respect to the enclosing space. The optical elements includes a color separator which receives a light from the light source and emits a plurality of separate color beams, at least one reflecting type light valve which forms an image by reflecting the plurality of color beams, and a projection lens which projects the image of an external screen. A first cooling fan is provided which causes an air flow in the outer space. A least one of the optical elements forms a part of the partition wall, and the air flow cools the at least one reflecting type light valve from the outer space.Type: GrantFiled: July 15, 2005Date of Patent: October 31, 2006Assignee: Hitachi, Ltd.Inventors: Mikio Shiraishi, Yasuo Ohtsuka, Kenji Fuse, Toru Numata
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Publication number: 20060164604Abstract: A projection type display apparatus includes a housing having a first side having an air intake opening and a second side having an air exhaust opening, a light source for supplying light, and a light valve device which modulates the light output from the light source. A centrifugal fan is associated with the air intake opening so as to draw air from the air intake opening. A first ventilation path is coupled with the air intake opening so as to lead air flow from the air intake opening toward a lower portion of the light valve, and a second ventilation path is formed from the lower portion of the light valve to an upper portion of the light valve. An exhaust fan is associated with the air exhaust opening so as to draw out air flowing from the second ventilation path through the air exhaust opening.Type: ApplicationFiled: March 22, 2006Publication date: July 27, 2006Inventors: Kenji Fuse, Mikio Shiraishi, Yasuo Otsuka, Nobuyuki Kaku, Hidehiro Ikeda
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Publication number: 20060126027Abstract: There is a need for allowing an exhaust direction of a cooling air to be appropriately changed according to an installation environment of a projection type display device. There is another need to achieve a system for preventing an intake air and an exhaust air from being circulated therebetween by changing the direction of an intake port as well as an exhaust direction. A cooling system for an area around a lamp that accounts for a good part of an amount of heat generated by the projection type display device is isolated from a cooling system for other parts including a liquid crystal panel. Means is further provided of allowing the directions of intake and exhaust to be inverted in an entire device by changing the direction of rotation of an exhaust fan provided for the cooling system for the area around the lamp between forward and backward.Type: ApplicationFiled: February 7, 2006Publication date: June 15, 2006Applicant: Hitachi, Ltd.Inventor: Mikio Shiraishi
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Patent number: 7040763Abstract: A simple cooling construction capable of achieving two functions at a time is to be provided, one function being cooling a lamp as a lighting means and the other function being preventing the scatter of broken pieces of the lamp upon burst of the lamp. An image display device such as an LCD projector has been configured such that cooling air is introduced into the interior of a reflector to cool an lamp means. In this connection, the present invention adopts a net of an expanded metal structure which serves as both means for preventing the scatter of broken pieces of a lamp upon burst of the lamp and an air deflecting plate facing a portion to be cooled. The above two functions can be attained simultaneously by such a simple construction.Type: GrantFiled: April 30, 2004Date of Patent: May 9, 2006Assignee: Hitachi, Ltd.Inventors: Mikio Shiraishi, Takeshi Katayama, Keiichiro Tokushige, Hideki Okuyama
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Patent number: 7029132Abstract: Adjustment of the illumination range to a liquid crystal panel of a liquid crystal projector requires time in fixing upon adjustment and accordingly it is an object to make the adjustment effectively. In an adjustment mechanism of the illumination range of illumination means to the liquid crystal panel in an optical engine unit of the liquid projector, the spring property is provided in a lens holder for holding a lens and the lens is temporarily held by friction of the spring portion to the optical engine case after adjustment. Then, the adhesion processing is made to complete the adjustment.Type: GrantFiled: March 30, 2004Date of Patent: April 18, 2006Assignee: Hitachi, Ltd.Inventors: Fusamitsu Tsubata, Kazumasa Ueoka, Mikio Shiraishi, Hiroto Miura, Nobuyuki Honda