Patents by Inventor Koji Hirai
Koji Hirai 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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Publication number: 20090274075Abstract: A radio communication apparatus performing time division duplex alternately switching a transmission period and a reception period by time dividing an identical frequency, includes the steps of: detecting a transmission signal to be transmitted to the antenna so as to perform radio transmission from an antenna commonly used for transmission and reception; and calculating a deviation time between the detection timing of the detected transmission signal and a preset reference timing, and for controlling switchover timing between the transmission period and the reception period based on the deviation time.Type: ApplicationFiled: December 23, 2008Publication date: November 5, 2009Applicant: FUJITSU LIMITEDInventors: Shigeru Okawa, Koji Hirai
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Patent number: 7606640Abstract: A cooling apparatus able to rotate cooling fans with required lowest limit speeds, and able to suppress power consumption and generated noise includes a cooling unit for cooling an object to be cooled by a cooling amount in accordance with a level of a supplied drive signal; a temperature detector for detecting the temperature of the object; a drive circuit for amplifying the drive signal and supplying an output signal to the cooling unit; a memory for storing correction data for correcting circuit error in the drive circuit; and a control unit for generating the drive signal based on the detected temperature of the object, correcting error in the output signal of the drive circuit based on the correction data stored in the memory, and outputting the generated drive signal to the drive circuit. The cooling apparatus may be used in a projection type display device.Type: GrantFiled: November 30, 2005Date of Patent: October 20, 2009Assignee: Sony CorporationInventors: Koji Hirai, Yoshitake Kondo, Akira Nishiyama
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Publication number: 20090027575Abstract: A display apparatus includes: a light source; spatial light modulation device for modulating light emitted by the light source based on a video signal; intensity distribution adjusting means for changing an angle-dependent intensity distribution of an incident light in response to luminance factor in the video signal, the intensity distribution adjusting means being arranged ahead of or behind the spatial light modulation device; and correction means for correcting the video signal in accordance with an intensity distribution adjusted by the intensity distribution adjusting means, and supplying a corrected video signal to the spatial light modulation device, in which the correction means has a plurality of correction tables each corresponding to a predetermined intensity distribution, generates a mixed correction value by mixing correction values in the plurality of correction tables at a mixing ratio determined by an individual intensity distribution, and corrects the video signal by using the mixed correctiType: ApplicationFiled: July 18, 2008Publication date: January 29, 2009Applicant: Sony CorporationInventors: Jun Miyauchi, Koji Hirai
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Publication number: 20080129883Abstract: A video receiving apparatus is provided. The video receiving apparatus may have a video input terminal to input video data, and may include a voltage detector configured to detect a voltage applied to a specific contact point in the video input terminal; and a control unit configured to determine whether a video transmission apparatus is connected to the video input terminal through a predetermined cable, based on a value of the voltage detected by the voltage detector.Type: ApplicationFiled: August 14, 2007Publication date: June 5, 2008Applicant: Sony CorporationInventors: Koji Hirai, Hiroyuki Kobayashi
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Patent number: 7374456Abstract: A tube-shaped electroconductive member is attached to a shielding casing from the inside of the shielding casing so as to surround an opening formed in the shielding casing, and two slits are formed in an axial direction of the tube-shaped electroconductive member so as to extend from an end position thereof far away from the opening, thereby preventing a noise component having a specific frequency emitted as radiation noise from the opening formed in the shielding casing which functions as an slot antenna.Type: GrantFiled: June 27, 2007Date of Patent: May 20, 2008Assignee: Canon Kabushiki KaishaInventor: Koji Hirai
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Publication number: 20070249229Abstract: A tube-shaped electroconductive member is attached to a shielding casing from the inside of the shielding casing so as to surround an opening formed in the shielding casing, and two slits are formed in an axial direction of the tube-shaped electroconductive member so as to extend from an end position thereof far away from the opening, thereby preventing a noise component having a specific frequency emitted as radiation noise from the opening formed in the shielding casing which functions as an slot antenna.Type: ApplicationFiled: June 27, 2007Publication date: October 25, 2007Inventor: Koji Hirai
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Patent number: 7249973Abstract: A tube-shaped electroconductive member is attached to a shielding casing from the inside of the shielding casing so as to surround an opening formed in the shielding casing, and two slits are formed in an axial direction of the tube-shaped electroconductive member so as to extend from an end position thereof far away from the opening, thereby preventing a noise component having a specific frequency emitted as radiation noise from the opening formed in the shielding casing which functions as an slot antenna.Type: GrantFiled: May 5, 2006Date of Patent: July 31, 2007Assignee: Canon Kabushiki KaishaInventor: Koji Hirai
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Patent number: 7205491Abstract: The present invention provides a key switch diaphragm capable of obtaining a good click feeling and capable of avoiding contact failure and having a high durability. A key switch diaphragm 30 comprises a thin plate having flexibility and conductivity, and the key switch diaphragm 30 includes a truncated pedestal 16, and a spherical domical portion 18 being raised toward an upper portion of the pedestal 16 on the side of the upper portion of the pedestal 16. The domical portion 18 is provided at its substantially central portion with an outwardly raised portion 32 being raised toward an outer surface of the domical portion 18. An edge of the outwardly raised portion 32 on the side of its inner surface forms a contact 34.Type: GrantFiled: September 11, 2003Date of Patent: April 17, 2007Assignee: Fujikura Ltd.Inventors: Masahiro Kaizu, Tadanori Ominato, Koji Hirai
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Publication number: 20060258217Abstract: A tube-shaped electroconductive member is attached to a shielding casing from the inside of the shielding casing so as to surround an opening formed in the shielding casing, and two slits are formed in an axial direction of the tube-shaped electroconductive member so as to extend from an end position thereof far away from the opening, thereby preventing a noise component having a specific frequency emitted as radiation noise from the opening formed in the shielding casing which functions as an slot antenna.Type: ApplicationFiled: May 5, 2006Publication date: November 16, 2006Inventor: Koji Hirai
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Publication number: 20060145949Abstract: A cooling apparatus able to rotate cooling fans with required lowest limit speeds, and able to suppress power consumption and generated noise includes a cooling unit for cooling an object to be cooled by a cooling amount in accordance with a level of a supplied drive signal; a temperature detector for detecting the temperature of the object; a drive circuit for amplifying the drive signal and supplying an output signal to the cooling unit; a memory for storing correction data for correcting circuit error in the drive circuit; and a control unit for generating the drive signal based on the detected temperature of the object, correcting error in the output signal of the drive circuit based on the correction data stored in the memory, and outputting the generated drive signal to the drive circuit. The cooling apparatus may be used in a projection type display device.Type: ApplicationFiled: November 30, 2005Publication date: July 6, 2006Applicant: Sony CorporationInventors: Koji Hirai, Yoshitake Kondo, Akira Nishiyama
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Publication number: 20060028483Abstract: An image display device having an image generation unit for generating an image according to an instruction, a display unit able to display in color the image generated at the image generation unit, a user interface unit including a color designation part enabling selective designation of any color from among a plurality of colors and an adjustment degree designation part able to instruct the degree of adjustment of at least attributes of the color designated by the color designation part, and a control unit for instructing the image generation unit so as to generate an image able to display at least a color designated by the color designation part of the user interface unit.Type: ApplicationFiled: August 2, 2005Publication date: February 9, 2006Inventors: Yoshitake Kondo, Hideki Onuma, Koji Hirai
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Publication number: 20060016679Abstract: The present invention provides a key switch diaphragm capable of obtaining a good click feeling and capable of avoiding contact failure and having a high durability. A key switch diaphragm 30 comprises a thin plate having flexibility and conductivity, and the key switch diaphragm 30 includes a truncated pedestal 16, and a spherical domical portion 18 being raised toward an upper portion of the pedestal 16 on the side of the upper portion of the pedestal 16. The domical portion 18 is provided at its substantially central portion with an outwardly raised portion 32 being raised toward an outer surface of the domical portion 18. An edge of the outwardly raised portion 32 on the side of its inner surface forms a contact 34.Type: ApplicationFiled: September 11, 2003Publication date: January 26, 2006Inventors: Masahiro Kaizu, Tadanori Ominato, Koji Hirai
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Patent number: 6917007Abstract: In a metal dome sheet to be hermetically adhered to a plurality of metal domes disposed at electrodes on a substrate and to other portions of the substrate via an adhesive layer, the present invention provides an adhesive layer removed portion at a portion of the adhesive layer between at least two adjacent metal domes as an air escape portion. Accordingly, it is possible to obtain a thin and light switch panel, which is also excellent in water resistance and dust resistance.Type: GrantFiled: June 7, 2002Date of Patent: July 12, 2005Assignee: Fujikura, Ltd.Inventors: Koji Hirai, Takashi Matsukawa, Kenji Ninomiya, Masatomo Koshihara
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Patent number: 6871053Abstract: A wireless communication apparatus according to the present invention is composed of a first section for carrying out wireless communication with a multichannel signal and a second section having a plurality of channel units each process a predetermined frequency signal as a channel signal. The wireless communication apparatus is arranged to have a plurality of variable attenuators each provided for corresponding one of the channel signals received from each channel unit of the second section, a combiner for combining outputs from the respective variable attenuators together and outputting the resultant combined signal to the first section, and a control unit for controlling the degree of attenuation of the individual variable attenuators according to the variation of the number of the channel signals.Type: GrantFiled: January 24, 2001Date of Patent: March 22, 2005Assignee: Fujitsu LimitedInventors: Yasuhiro Shibuya, Koji Hirai, Hiroyuki Kiyanagi
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Publication number: 20040234072Abstract: In a metal dome sheet to be hermetically adhered to a plurality of metal domes disposed at electrodes on a substrate and to other portions of the substrate via an adhesive layer, the present invention provides an adhesive layer removed portion at a portion of the adhesive layer between at least two adjacent metal domes as an air escape portion. Accordingly, it is possible to obtain a thin and light switch panel, which is also excellent in water resistance and dust resistance.Type: ApplicationFiled: December 5, 2003Publication date: November 25, 2004Inventors: Koji Hirai, Takashi Matsukawa, Kenji Ninomiya, Masatomo Koshihara
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Patent number: 6792255Abstract: A wireless communication apparatus according to the present invention is composed of a first section for carrying out wireless communication with a multichannel signal and a second section having a plurality of channel units each process a predetermined frequency signal as a channel signal. The wireless communication apparatus is arranged to have a plurality of variable attenuators each provided for corresponding one of the channel signals received from each channel unit of the second section, a combiner for combining outputs from the respective variable attenuators together and outputting the resultant combined signal to the first section, and a control unit for controlling the degree of attenuation of the individual variable attenuators according to the variation of the number of the channel signals.Type: GrantFiled: January 24, 2001Date of Patent: September 14, 2004Assignee: Fujitsu LimitedInventors: Yasuhiro Shibuya, Koji Hirai, Hiroyuki Kiyanagi
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Patent number: 6603077Abstract: A cable connection structure is provided, which has circuit boards of an electronic apparatus connected to each other by a shielded cable for transmission of signals, which is capable of effectively suppressing radiated electromagnetic waves due to resonance from the shielded cable and the circuit boards in an inexpensive and simple manner. At least two connectors are provided on at least two circuit boards, respectively, and a shielded cable connects the circuit boards to each other via the connectors. The shielded cable has a shielding conductor as a covering.Type: GrantFiled: December 14, 2001Date of Patent: August 5, 2003Assignee: Canon Kabushiki KaishaInventor: Koji Hirai
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Publication number: 20020179313Abstract: A cable connection structure is provided, which has circuit boards of an electronic apparatus connected to each other by a shielded cable for transmission of signals, which is capable of effectively suppressing radiated electromagnetic waves due to resonance from the shielded cable and the circuit boards in an inexpensive and simple manner. At least two connectors are provided on at least two circuit boards, respectively, and a shielded cable connects the circuit boards to each other via the connectors. The shielded cable has a shielding conductor as a covering.Type: ApplicationFiled: December 14, 2001Publication date: December 5, 2002Inventor: Koji Hirai
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Publication number: 20020016158Abstract: A wireless communication apparatus according to the present invention is composed of a first section for carrying out wireless communication with a multichannel signal and a second section having a plurality of channel units each process a predetermined frequency signal as a channel signal. The wireless communication apparatus is arranged to have a plurality of variable attenuators each provided for corresponding one of the channel signals received from each channel unit of the second section, a combiner for combining outputs from the respective variable attenuators together and outputting the resultant combined signal to the first section, and a control unit for controlling the degree of attenuation of the individual variable attenuators according to the variation of the number of the channel signals.Type: ApplicationFiled: January 24, 2001Publication date: February 7, 2002Applicant: FUJITSU LIMITEDInventors: Yasuhiro Shibuya, Koji Hirai, Hiroyuki Kiyanagi
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Patent number: D496337Type: GrantFiled: September 26, 2003Date of Patent: September 21, 2004Assignee: Fujikura Ltd.Inventors: Masahiro Kaizu, Koji Hirai