Patents by Inventor Tetsunosuke Nakamura
Tetsunosuke 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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Publication number: 20090147543Abstract: A DC-DC converter, which supplies a drive power to a display apparatus, includes a plurality of insulated transformers, a resonance capacitor, and a resonance coil. Primary coils of the plurality of insulated transformers, the resonance capacitor, and the resonance coil are connected in series to form a current resonance circuit, and secondary coils of the plurality of insulated transformers are connected in parallel.Type: ApplicationFiled: December 3, 2008Publication date: June 11, 2009Inventors: Yoshihiko SUGAWARA, Akihiko Kanouda, Tetsunosuke Nakamura, Kazunori Takahashi, Teruaki Sato, Takayuki Shindo, Shinpei Yao, Fusao Sakuramori
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Patent number: 7541748Abstract: Disclosed herein is a discharge lamp lighting device which realizes the minute control of the lighting sequence and electric power of a high-pressure discharge lamp and the control of various anti-error protecting functions by mounting a microcomputer. However, since microcomputer processing typically progresses in accordance with the programs previously recorded on a ROM, various actions of the discharge lamp are controlled in accordance with ROM-recorded data settings. To modify these settings, the contents of the ROM need to be updated. Therefore, a function for communicating with an external device is assigned to the microcomputer so that various data settings can be modified.Type: GrantFiled: October 11, 2005Date of Patent: June 2, 2009Assignees: Hitachi, Ltd., Hitachi Media Electronics Co., Ltd.Inventors: Fumio Haruna, Masaru Shimizu, Kouji Kitou, Tetsunosuke Nakamura
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Patent number: 7276864Abstract: A computing circuit computes a target value of a current to be supplied to a discharge lamp and generates a pulse control signal for superpose a pulse current. Furthermore, the computing circuit controls a current control circuit so that a pulse current is superposed on a lamp current at a predetermined cycle and power supplied to the discharge lamp is kept constant. For that purpose, the computing circuit lowers a DC current level of the lamp current when a pulse current is superposed on the lamp current, and exercises control so that an integrated amount of power at a predetermined cycle is equalized to a predetermined integrated amount of power.Type: GrantFiled: July 10, 2006Date of Patent: October 2, 2007Assignee: Hitachi Media Electronics Co., Ltd.Inventors: Fumio Haruna, Masaru Shimizu, Kouji Kitou, Tetsunosuke Nakamura
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Publication number: 20070126374Abstract: A computing circuit computes a target value of a current to be supplied to a discharge lamp and generates a pulse control signal for superpose a pulse current. Furthermore, the computing circuit controls a current control circuit so that a pulse current is superposed on a lamp current at a predetermined cycle and power supplied to the discharge lamp is kept constant. For that purpose, the computing circuit lowers a DC current level of the lamp current when a pulse current is superposed on the lamp current, and exercises control so that an integrated amount of power at a predetermined cycle is equalized to a predetermined integrated amount of power.Type: ApplicationFiled: July 10, 2006Publication date: June 7, 2007Inventors: Fumio Haruna, Masaru Shimizu, Kouji Kitou, Tetsunosuke Nakamura
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Patent number: 7202612Abstract: A discharge lamp lighting apparatus has a problem that a microcomputer within the apparatus falls down into malfunction due to noises generated in an inside thereof. With such the structure of the discharge lamp lighting apparatus that an operation of a calculation processing circuit, which is built up with the microcomputer, etc., is stopped through stopping the supply of electric power to the calculation processing circuit or bringing it into a sleep mode, it is possible to protecting it from the malfunction, during a time period when high voltage is generated just after starting of lighting of the discharge lamp. Also, with applying a protection processing by means of the calculation processing circuit and also applying an analog protection circuit, in common with, thereby it is possible to ensure reliability thereof further.Type: GrantFiled: December 28, 2005Date of Patent: April 10, 2007Assignees: Hitachi, Ltd., Hitachi Media Electronics Co., Ltd.Inventors: Fumio Haruna, Masaru Shimizu, Kouji Kitou, Tetsunosuke Nakamura
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Publication number: 20060097665Abstract: A discharge lamp lighting apparatus has a problem that a microcomputer within the apparatus falls down into malfunction due to noises generated in an inside thereof. With such the structure of the discharge lamp lighting apparatus that an operation of a calculation processing circuit, which is built up with the microcomputer, etc., is stopped through stopping the supply of electric power to the calculation processing circuit or bringing it into a sleep mode, it is possible to protecting it from the malfunction, during a time period when high voltage is generated just after starting of lighting of the discharge lamp. Also, with applying a protection processing by means of the calculation processing circuit and also applying an analog protection circuit, in common with, thereby it is possible to ensure reliability thereof further.Type: ApplicationFiled: December 28, 2005Publication date: May 11, 2006Inventors: Fumio Haruna, Masaru Shimizu, Kouji Kitou, Tetsunosuke Nakamura
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Patent number: 7023146Abstract: A discharge lamp lighting apparatus has a problem that a microcomputer within the apparatus falls down into malfunction due to noises generated in an inside thereof. With such the structure of the discharge lamp lighting apparatus that an operation of a calculation processing circuit, which is built up with the microcomputer, etc., is stopped through stopping the supply of electric power to the calculation processing circuit or bringing it into a sleep mode, it is possible to protecting it from the malfunction, during a time period when high voltage is generated just after starting of lighting of the discharge lamp. Also, with applying a protection processing by means of the calculation processing circuit and also applying an analog protection circuit, in common with, thereby it is possible to ensure reliability thereof further.Type: GrantFiled: April 30, 2004Date of Patent: April 4, 2006Assignees: Hitachi, Ltd., Hitachi Media Electronics Co., Ltd.Inventors: Fumio Haruna, Masaru Shimizu, Kouji Kitou, Tetsunosuke Nakamura
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Publication number: 20060028153Abstract: Disclosed herein is a discharge lamp lighting device which realizes the minute control of the lighting sequence and electric power of a high-pressure discharge lamp and the control of various anti-error protecting functions by mounting a microcomputer. However, since microcomputer processing typically progresses in accordance with the programs previously recorded on a ROM, various actions of the discharge lamp are controlled in accordance with ROM-recorded data settings. To modify these settings, the contents of the ROM need to be updated. Therefore, a function for communicating with an external device is assigned to the microcomputer so that various data settings can be modified.Type: ApplicationFiled: October 11, 2005Publication date: February 9, 2006Applicants: Hitachi, Ltd., Hitachi Media Electronics Co., Ltd.Inventors: Fumio Haruna, Masaru Shimizu, Kouji Kitou, Tetsunosuke Nakamura
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Patent number: 6995523Abstract: Disclosed herein is a discharge lamp lighting device which realizes the minute control of the lighting sequence and electric power of a high-pressure discharge lamp and the control of various anti-error protecting functions by mounting a microcomputer. However, since microcomputer processing-typically progresses in accordance with the programs previously recorded on a ROM, various actions of the discharge lamp are controlled in accordance with ROM-recorded data settings. To modify these settings, the contents of the ROM need to be updated. Therefore, a function for communicating with an external device is assigned to the microcomputer so that various data settings can be modified.Type: GrantFiled: July 8, 2004Date of Patent: February 7, 2006Assignees: Hitachi, Ltd., Hitachi Media Electronics Co., Ltd.Inventors: Fumio Haruna, Masaru Shimizu, Kouji Kitou, Tetsunosuke Nakamura
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Publication number: 20050189885Abstract: Disclosed herein is a discharge lamp lighting device which realizes the minute control of the lighting sequence and electric power of a high-pressure discharge lamp and the control of various anti-error protecting functions by mounting a microcomputer. However, since microcomputer processing-typically progresses in accordance with the programs previously recorded on a ROM, various actions of the discharge lamp are controlled in accordance with ROM-recorded data settings. To modify these settings, the contents of the ROM need to be updated. Therefore, a function for communicating with an external device is assigned to the microcomputer so that various data settings can be modified.Type: ApplicationFiled: July 8, 2004Publication date: September 1, 2005Applicants: Hitachi, Ltd., Hitachi Media Electronics Co., Ltd.Inventors: Fumio Haruna, Masaru Shimizu, Kouji Kitou, Tetsunosuke Nakamura
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Publication number: 20050067979Abstract: A discharge lamp lighting apparatus has a problem that a microcomputer within the apparatus falls down into malfunction due to noises generated in an inside thereof. With such the structure of the discharge lamp lighting apparatus that an operation of a calculation processing circuit, which is built up with the microcomputer, etc., is stopped through stopping the supply of electric power to the calculation processing circuit or bringing it into a sleep mode, it is possible to protecting it from the malfunction, during a time period when high voltage is generated just after starting of lighting of the discharge lamp. Also, with applying a protection processing by means of the calculation processing circuit and also applying an analog protection circuit, in common with, thereby it is possible to ensure reliability thereof further.Type: ApplicationFiled: April 30, 2004Publication date: March 31, 2005Inventors: Fumio Haruna, Masaru Shimizu, Kouji Kitou, Tetsunosuke Nakamura
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Patent number: 5610449Abstract: A compact, thin-type, noise-tolerant and highly reliable electric power unit includes an input portion through which a predetermined voltage is applied, a plurality of power circuits for generating a plurality of different voltages from the predetermined voltage applied to said input portion, an output portion for outputting the plurality of different voltages generated in the plurality of power circuits, a control unit having a function to stabilize the plurality of different output voltages, and an insulated substrate which supports the input portion, the plurality of power circuits, the output portion and the control unit, and further has a printed wiring pattern for electrically coupling the constituent components of the electric power unit.Type: GrantFiled: August 22, 1995Date of Patent: March 11, 1997Assignees: Hitachi, Ltd., Hitachi Media Electronics Co., Ltd.Inventors: Tadashi Takahashi, Akihiko Kanouda, Kazuhiro Takizawa, Tetsunosuke Nakamura, Masami Joraku