Patents by Inventor Yoshifumi Doi
Yoshifumi Doi 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: 9147370Abstract: For an image display apparatus, cost reduction is enabled to prevent display errors while ensuring operational margin to prevent display errors even when the delay time of gate line driving signals is large. A source driver of a liquid-crystal display apparatus includes a data latch circuit for supplying display data to a decode circuit. A gate line inactivation transition detecting circuit detects inactivation of each of a plurality of gate lines and activates a detect signal for a certain period with that timing. The data latch circuit updates the held display data in response to activation of the detect signal.Type: GrantFiled: December 8, 2010Date of Patent: September 29, 2015Assignee: Mitsubishi Electric CorporationInventors: Youichi Tobita, Yoshifumi Doi, Hiroyuki Murai
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Publication number: 20110148954Abstract: For an image display apparatus, cost reduction is enabled to prevent display errors while ensuring operational margin to prevent display errors even when the delay time of gate line driving signals is large. A source driver of a liquid-crystal display apparatus includes a data latch circuit for supplying display data to a decode circuit. A gate line inactivation transition detecting circuit detects inactivation of each of a plurality of gate lines and activates a detect signal for a certain period with that timing. The data latch circuit updates the held display data in response to activation of the detect signal.Type: ApplicationFiled: December 8, 2010Publication date: June 23, 2011Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Youichi Tobita, Yoshifumi Doi, Hiroyuki Murai
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Patent number: 7345722Abstract: A liquid crystal display device includes a single liquid crystal panel in which a liquid crystal material is sealed in a clearance between two transparent substrates, at least one light source, and at least one light-conducting plate. The liquid crystal panel includes a transmitting region and a reflecting region. A part of a first surface of the liquid crystal panel is a first display surface for the transmitting region and a part of a second surface of the liquid crystal panel is a second display surface for the reflecting region. A two-sided display is provided from a single liquid crystal panel and a thin and light-weight liquid crystal display device is achieved.Type: GrantFiled: December 23, 2004Date of Patent: March 18, 2008Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Yutaka Suzuki, Yoshifumi Doi
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Publication number: 20050105024Abstract: A liquid crystal display device includes a single liquid crystal panel in which a liquid crystal material is sealed in a clearance between two transparent substrates, at least one light source, and at least one light-conducting plate. The liquid crystal panel includes a transmitting region and a reflecting region. A part of a first surface of the liquid crystal panel is a first display surface for the transmitting region and a part of a second surface of the liquid crystal panel is a second display surface for the reflecting region. A two-sided display is provided from a single liquid crystal panel and a thin and light-weight liquid crystal display device is achieved.Type: ApplicationFiled: December 23, 2004Publication date: May 19, 2005Applicant: Mitsubishi Denki Kabushiki KaishaInventors: Yutaka Suzuki, Yoshifumi Doi
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Patent number: 6853418Abstract: A liquid crystal display device includes a single liquid crystal panel in which a liquid crystal material is sealed in a clearance between two transparent substrates, at least one light source, and at least one light-conducting plate. The liquid crystal panel includes a transmitting region and a reflecting region. A part of a first surface of the liquid crystal panel is a first display surface for the transmitting region and a part of a second surface of the liquid crystal panel is a second display surface for the reflecting region. A two-sided display is provided from a single liquid crystal panel and a thin and light-weight liquid crystal display device is achieved.Type: GrantFiled: September 4, 2002Date of Patent: February 8, 2005Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Yutaka Suzuki, Yoshifumi Doi
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Patent number: 6839869Abstract: A trace control circuit includes a branch event generation circuit 1 having an address abbreviation information generation circuit 8 for detecting a portion in which a branch-source address and a branch-destination address are overlapped with each other from the upper-bit side of the address data thereof and generating branch-destination address abbreviation information on the basis of the result of the detection, and a trace data abbreviation circuit 5 for performing abbreviation of one part of trace data in accordance with the branch-destination address abbreviation information and outputting the partly abbreviated trace data, whereby the number of data packets of the trace data can be reduced to speed up the output operation of the trace data, and the ability to output trace data in real time can be thereby improved greatly.Type: GrantFiled: May 8, 2001Date of Patent: January 4, 2005Assignee: Renesas Technology Corp.Inventors: Yoshifumi Doi, Teruaki Kanzaki
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Publication number: 20030160919Abstract: A liquid crystal display device including a single liquid crystal panel in which liquid crystal is sealed in a clearance formed between two transparent substrates, at least one light source, and at least one light-conducting plate. The liquid crystal panel includes a transmitting type region and a reflecting type region. A part of one surface of the liquid crystal panel is defined to be a first display surface for the transmitting type region and a part of the other surface of the liquid crystal panel is defined to be a second display surface for the reflecting type region. Both-sided display is enabled by using a single liquid crystal panel and a thin and light-weighted structure of the liquid crystal display device is achieved thereby.Type: ApplicationFiled: September 4, 2002Publication date: August 28, 2003Applicant: Mitsubishi Denki Kabushiki KaishaInventors: Yutaka Suzuki, Yoshifumi Doi
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Publication number: 20020066053Abstract: A trace control circuit according to the present invention comprises a branch event generation circuit 1 having an address abbreviation information generation circuit 8 for detecting a portion in which a branch-source address and a branch-destination address are overlapped with each other from the upper-bit side of the address data thereof and generating branch-destination address abbreviation information on the basis of the result of the detection, and a trace data abbreviation circuit 5 for performing abbreviation of one part of trace data in accordance with the branch-destination address abbreviation information and outputting the partly abbreviated trace data, whereby the number of data packets of the trace data can be reduced to speed up the output operation of the trace data, and the ability to output trace data in real time can be thereby improved greatly.Type: ApplicationFiled: May 8, 2001Publication date: May 30, 2002Inventors: Yoshifumi Doi, Teruaki Kanzaki