Patents by Inventor Tomoaki Takahashi
Tomoaki Takahashi 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: 8629699Abstract: A clock data recovery circuit which has a high degree of jitter tolerance and can alleviate increase in the phase number of a multi-phase clock, power consumption, and a semiconductor chip area is provided. Each circuit of plural edge detection circuits comprises a first edge detection circuit and a second edge detection circuit. The first detection circuit detects that a data edge leads in phase more than ?1 phase from an edge detection phase, the second detection circuit detects that the data edge laggs in phase more than +1 phase from the edge detection phase. In response to the first output signal or the second output signal, the edge detection phase is changed by the amount of ?1 phase or +1 phase. When the data edge is detected in the range of ±1 phase, a next edge detection phase is maintained in the current state.Type: GrantFiled: November 8, 2012Date of Patent: January 14, 2014Assignee: Renesas Electronics CorporationInventors: Yusuke Wachi, Takayuki Noto, Tomoaki Takahashi, Takashi Kawamoto
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Patent number: 8547494Abstract: A display device includes a substrate, a display region having a pixel switch, and a transparent common electrode, a peripheral region having a gate signal line connected to the pixel switch, and a common connection line connected to the transparent common electrode, an insulating layer, a conductive layer, a first semiconductor film disposed between the insulating layer and the conductive layer, and a second semiconductor film disposed between the insulating layer and the conductor layer and separated from the first semiconductor film. The conductor layer is connected to the gate signal line, and the gate signal line is arranged in the display region and the peripheral region. The common connection line is arranged in the peripheral region and is connected to the transparent common electrode in the peripheral region, and the transparent common electrode is arranged in the display region.Type: GrantFiled: March 4, 2013Date of Patent: October 1, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Hirokazu Itakura, Hitoshi Komeno, Tomoaki Takahashi
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Publication number: 20130242002Abstract: A method for producing an elastic plate for a liquid jet head, which includes etching a rolled metal plate based on a rolling direction of the rolled metal plate, to form an etched portion and a non-etched portion on the rolled metal plate. The thickness of the etched portion is thinner than the thickness of the non-etched portion and the rolling direction is substantially perpendicular to a long side of the rolled metal plate.Type: ApplicationFiled: May 17, 2013Publication date: September 19, 2013Applicant: Seiko Epson CorporationInventors: Tomoaki Takahashi, Minoru Watanabe, Atsushi Furuhata
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Publication number: 20130182209Abstract: A display device includes a substrate, a display region having a pixel switch, and a transparent common electrode, a peripheral region having a gate signal line connected to the pixel switch, and a common connection line connected to the transparent common electrode, an insulating layer, a conductive layer, a first semiconductor film disposed between the insulating layer and the conductive layer, and a second semiconductor film disposed between the insulating layer and the conductor layer and separated from the first semiconductor film. The conductor layer is connected to the gate signal line, and the gate signal line is arranged in the display region and the peripheral region. The common connection line is arranged in the peripheral region and is connected to the transparent common electrode in the peripheral region, and the transparent common electrode is arranged in the display region.Type: ApplicationFiled: March 4, 2013Publication date: July 18, 2013Applicants: Panasonic Liquid Crystal Display Co., Ltd., Hitachi Displays, Ltd.Inventors: Hirokazu Itakura, Hitoshi Komeno, Tomoaki Takahashi
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Patent number: 8458903Abstract: A method for producing an elastic plate for a liquid jet head, which includes etching a rolled metal plate based on a rolling direction of the rolled metal plate, to form an etched portion and a non-etched portion on the rolled metal plate. The thickness of the etched portion is thinner than the thickness of the non-etched portion and the rolling direction is substantially perpendicular to a long side of the rolled metal plate.Type: GrantFiled: June 11, 2008Date of Patent: June 11, 2013Assignee: Seiko Epson CorporationInventors: Tomoaki Takahashi, Minoru Watanabe, Atsushi Furuhata
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Patent number: 8390754Abstract: A display device includes a substrate, a display region having a pixel switch, a pixel electrode which is connected to the pixel switch, and a transparent common electrode formed over the substrate, a peripheral region having a gate signal line which is connected to the pixel switch, and a common connection line which is connected to the transparent common electrode, an insulating layer which is disposed on the gate signal line and the common connection line, a conductive layer which is disposed on the insulating layer and crosses the gate signal line and crosses the common connection line in the peripheral region, a first semiconductor film which is disposed between the insulating layer and the conductive layer, and a second semiconductor film which is disposed between the insulating layer and the conductive layer and is separated from the first semiconductor film.Type: GrantFiled: September 6, 2012Date of Patent: March 5, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Hirokazu Itakura, Hitoshi Komeno, Tomoaki Takahashi
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Publication number: 20120327348Abstract: A display device includes a substrate, a display region having a pixel switch, a pixel electrode which is connected to the pixel switch, and a transparent common electrode formed over the substrate, a peripheral region having a gate signal line which is connected to the pixel switch, and a common connection line which is connected to the transparent common electrode, an insulating layer which is disposed on the gate signal line and the common connection line, a conductive layer which is disposed on the insulating layer and crosses the gate signal line and crosses the common connection line in the peripheral region, a first semiconductor film which is disposed between the insulating layer and the conductive layer, and a second semiconductor film which is disposed between the insulating layer and the conductive layer and is separated from the first semiconductor film.Type: ApplicationFiled: September 6, 2012Publication date: December 27, 2012Inventors: Hirokazu Itakura, Hitoshi Komeno, Tomoaki Takahashi
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Patent number: 8284341Abstract: A display device includes: on an insulating substrate, a first conductive layer in which a first signal line and a second signal line adjacent to the first signal line are formed; an insulating layer which is disposed on the first conductive layer; a second conductive layer which is disposed on the insulating layer and in which a ground wire crossing the first signal line and the second signal line in a plan view is formed; and a semiconductor layer which is disposed between the insulating layer and the second conductive layer and in which a first semiconductor film and a second semiconductor film are formed to be separated from each other. The wiring lengths of the first signal line and the second signal line are different by at least 10 times or more. The first semiconductor film overlaps, in a plan view, a region where the first signal line crosses the ground wire. The second semiconductor film overlaps, in a plan view, a region where the second signal line crosses the ground wire.Type: GrantFiled: November 16, 2009Date of Patent: October 9, 2012Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Hirokazu Itakura, Hitoshi Komeno, Tomoaki Takahashi
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Patent number: 8282195Abstract: There is provided a liquid ejecting apparatus including a liquid ejecting head that ejects liquid from an aperture of a nozzle plate toward a recording material while reciprocating over the recording material and a platen that supports the recording material from a rear face thereof to position the recording material at a position facing the nozzle plate in a direction in which the liquid is ejected. The liquid ejecting apparatus further includes: a first electrode being provided on the platen side between the liquid ejecting head and the platen; a second electrode being provided on the liquid ejecting head side between the liquid ejecting head and the platen; and a potential difference generating section of which one end is connected to the first electrode and the other end is connected to the second electrode and that generates a potential difference between the second electrode and the first electrode.Type: GrantFiled: April 29, 2010Date of Patent: October 9, 2012Assignee: Seiko Epson CorporationInventors: Tsunenobu Endo, Tomoaki Takahashi
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Publication number: 20120182354Abstract: A liquid-ejecting head includes a channel which is in communication with a nozzle opening and which includes a pressure-generating chamber, a circulation channel that serves to circulate a liquid in the channel, and a pressure generator that serves to generate pressure change. The circulation channel has a narrow portion including a first wall and a second wall, the first wall tilting with respect to a forward direction of a liquid flows and serving to gradually decrease the cross-sectional area, the second wall tilting with respect to the flow direction and serving to gradually increase the cross-sectional area. The tilt angle of the first wall with respect to the inner surface of the circulation channel is larger than the tilt angle of the second wall with respect to the inner surface of the circulation channel at the downstream side.Type: ApplicationFiled: January 13, 2012Publication date: July 19, 2012Applicant: SEIKO EPSON CORPORATIONInventors: Fujio Akahane, Tomoaki Takahashi
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Publication number: 20120176450Abstract: A liquid-ejecting head includes a nozzle plate having a nozzle opening that serves for liquid ejection; a channel-forming substrate including pressure-generating chambers that are in communication with the nozzle opening; a pressure generator that serves to generate pressure change in a liquid in the pressure-generating chambers; and a communication plate provided between the nozzle plate and the channel-forming substrate, the communication plate having a communication channel that forms a communication between the pressure-generating chambers and the nozzle opening. The communication plate has a circulation channel that is in communication with a common liquid chamber through the communication channel, the common liquid chamber being in communication with a plurality of the pressure-generating chambers in common.Type: ApplicationFiled: January 10, 2012Publication date: July 12, 2012Applicant: SEIKO EPSON CORPORATIONInventors: Fujio Akahane, Tomoaki Takahashi
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Publication number: 20120081476Abstract: A liquid ejecting head which includes a flow passage forming substrate that has pressure generating chambers which communicate with nozzles capable of ejecting a liquid, pressure generating elements which apply pressure to the pressure generating chambers in order to eject the liquid from the nozzles, lead electrodes that supply electric signals to the pressure generating elements, wiring substrates that supply the electric signals to the lead electrodes, and a supporting member that supports the wiring substrates so as to raise the wiring substrates from a surface of the liquid ejecting head having the lead electrodes provided thereon.Type: ApplicationFiled: December 13, 2011Publication date: April 5, 2012Applicant: SEIKO EPSON CORPORATIONInventors: Yoshinao MIYATA, Kazutoshi GOTO, Satoshi NAKAJIMA, Toshiaki KORI, Tomoaki TAKAHASHI
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Patent number: 8075106Abstract: A liquid ejecting head which includes a flow passage forming substrate that has pressure generating chambers which communicate with nozzles capable of ejecting a liquid, pressure generating elements which apply pressure to the pressure generating chambers in order to eject the liquid from the nozzles, lead electrodes that supply electric signals to the pressure generating elements, wiring substrates that supply the electric signals to the lead electrodes, and a supporting member that supports the wiring substrates so as to raise the wiring substrates from a surface of the liquid ejecting head having the lead electrodes provided thereon.Type: GrantFiled: February 6, 2009Date of Patent: December 13, 2011Assignee: Seiko Epson CorporationInventors: Yoshinao Miyata, Kazutoshi Goto, Satoshi Nakajima, Toshiaki Kori, Tomoaki Takahashi
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Patent number: 7946682Abstract: A method for producing an elastic plate for a liquid jet head, which includes etching a rolled metal plate based on a rolling direction of the rolled metal plate, to form an etched portion and a non-etched portion on the rolled metal plate. The thickness of the etched portion is thinner than the thickness of the non-etched portion and the rolling direction is substantially perpendicular to a long side of the rolled metal plate.Type: GrantFiled: June 11, 2008Date of Patent: May 24, 2011Assignee: Seiko Epson CorporationInventors: Tomoaki Takahashi, Minoru Watanabe, Atsushi Furuhata
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Patent number: 7841705Abstract: Provided is an actuator device including piezoelectric elements which are displaceably provided on a substrate. Each piezoelectric element is formed of a lower electrode, a piezoelectric layer and an upper electrode. In the actuator device, longitudinal end portions of the upper electrode define longitudinal end portions of a piezoelectric active portion to be a substantial driver of the piezoelectric element. The lower electrode and the piezoelectric layer are provided continuously to the longitudinal outside of the piezoelectric active portion. Regions of the piezoelectric layer outside of the piezoelectric active portion are formed so that thin film portions may have a thin thickness.Type: GrantFiled: June 20, 2007Date of Patent: November 30, 2010Assignee: Seiko Epson CorporationInventor: Tomoaki Takahashi
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Patent number: 7794064Abstract: A liquid-jet head includes a passage-forming substrate. A plurality of pressure generating chambers communicating with nozzles. Piezoelectric elements each include a lower electrode, a piezoelectric layer and an upper electrode. Leads for the upper and lower electrodes are drawn out. In the liquid-jet head, the lower electrode is a common electrode continuously provided in the region facing the pressure generating chambers. At least an end on one side of the lower electrode in a direction perpendicular to an arrangement direction of the pressure generating chambers is positioned in the region facing the pressure generating chambers. The lead electrode for the lower electrode is provided outside of a region corresponding to a space between the pressure generating chambers. The lead electrode for the lower electrode is connected through a common lead portion extended from the lower electrode.Type: GrantFiled: March 5, 2008Date of Patent: September 14, 2010Assignee: Seiko Epson CorporationInventor: Tomoaki Takahashi
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Patent number: 7787528Abstract: Disclosed is a semiconductor IC device using a low-price oscillator, which is capable of bidirectional communication with a host and features a low price. In bidirectional communication between a host and a device, the device comprises a synchronization establishment unit, a frequency difference detector, a frequency generator, and an oscillator providing a reference signal. The synchronization establishment unit to which an output signal from the host is inputted outputs a received signal, a synchronization establishment signal and a reception data. The frequency difference detector detects a frequency difference between a received signal and a transmitting signal, and outputs a frequency coordination signal to the frequency generator. The number of frequency division of the frequency generator is controlled by the frequency coordination signal, and the frequency generator is capable of matching the frequency of the transmitting signal which is an output signal with the frequency of the received signal.Type: GrantFiled: October 12, 2006Date of Patent: August 31, 2010Assignee: Renesas Technology Corp.Inventors: Takashi Kawamoto, Tomoaki Takahashi, Shinya Kikuchi, Yoshimi Ishida, Hiromitsu Nishio
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Publication number: 20100207996Abstract: There is provided a liquid ejecting apparatus including a liquid ejecting head that ejects liquid from an aperture of a nozzle plate toward a recording material while reciprocating over the recording material and a platen that supports the recording material from a rear face thereof to position the recording material at a position facing the nozzle plate in a direction in which the liquid is ejected. The liquid ejecting apparatus further includes: a first electrode being provided on the platen side between the liquid ejecting head and the platen; a second electrode being provided on the liquid ejecting head side between the liquid ejecting head and the platen; and a potential difference generating section of which one end is connected to the first electrode and the other end is connected to the second electrode and that generates a potential difference between the second electrode and the first electrode.Type: ApplicationFiled: April 29, 2010Publication date: August 19, 2010Applicant: SEIKO EPSON CORPORATIONInventors: Tsunenobu Endo, Tomoaki Takahashi
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Publication number: 20100201747Abstract: There is provided a liquid ejecting apparatus including a liquid ejecting head that ejects liquid from an aperture of a nozzle plate toward a recording material while reciprocating over the recording material and a platen that supports the recording material from a rear face thereof to position the recording material at a position facing the nozzle plate in a direction in which the liquid is ejected. The liquid ejecting apparatus further includes: a first electrode being provided on the platen side between the liquid ejecting head and the platen; a second electrode being provided on the liquid ejecting head side between the liquid ejecting head and the platen; and a potential difference generating section of which one end is connected to the first electrode and the other end is connected to the second electrode and that generates a potential difference between the second electrode and the first electrode.Type: ApplicationFiled: April 29, 2010Publication date: August 12, 2010Applicant: Seiko Epson CorporationInventors: Tsunenobu Endo, Tomoaki Takahashi
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Patent number: 7735975Abstract: There is provided a liquid ejecting apparatus including a liquid ejecting head that ejects liquid from an aperture of a nozzle plate toward a recording material while reciprocating over the recording material and a platen that supports the recording material from a rear face thereof to position the recording material at a position facing the nozzle plate in a direction in which the liquid is ejected. The liquid ejecting apparatus further includes: a first electrode being provided on the platen side between the liquid ejecting head and the platen; a second electrode being provided on the liquid ejecting head side between the liquid ejecting head and the platen; and a potential difference generating section of which one end is connected to the first electrode and the other end is connected to the second electrode and that generates a potential difference between the second electrode and the first electrode.Type: GrantFiled: October 23, 2006Date of Patent: June 15, 2010Assignee: Seiko Epson CorporationInventors: Tsunenobu Endo, Tomoaki Takahashi