Patents by Inventor Hiroaki Shirai
Hiroaki Shirai 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: 8294652Abstract: A driving method for driving an LCD panel having a counter electrode and a source line. In a first period, the counter electrode is driven to a potential VCOMH. In a second period, the counter electrode and the source line are short-circuited to a power supply interconnection having a power supply potential VCI. In a third period, the counter electrode is connected to a ground interconnection while the source line is kept to be short-circuited to the power supply interconnection. In a fourth period, the counter electrode is pulled down to a potential VCOML lower than a ground potential In a fifth period, the source line is driven to a potential corresponding to an image data while the counter electrode is kept to the potential VCOML. The electric power consumed in pulling down the counter electrode from a positive potential to a negative potential can be effectively reduced.Type: GrantFiled: October 30, 2008Date of Patent: October 23, 2012Assignee: Renesas Electronics CorporationInventor: Hiroaki Shirai
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Patent number: 8068083Abstract: A display apparatus includes a display panel; and a data driver configured to output drive voltages from a plurality of output nodes to drive the display panel. The data driver includes a plurality of output amplifiers, each of which is configured to receive a gradation voltage corresponding to a pixel data and to output the drive voltage in response to the gradation voltage; and a driver-side demultiplexer configured to connect the plurality of output amplifiers to selection output nodes selected from among the plurality of output nodes. The display panel includes a plurality of data lines; and a panel-side demultiplexer configured to connect selection data lines selected from among the plurality of data lines with the plurality of output nodes.Type: GrantFiled: October 25, 2007Date of Patent: November 29, 2011Assignee: Renesas Electronics CorporationInventors: Hiroaki Shirai, Yoshiharu Hashimoto
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Publication number: 20110285407Abstract: According to the present invention, a small impedance detection circuit capable of accurately detecting the impedance of an object to be measured and an adjustment method of an impedance detection circuit can be provided. In the impedance detection circuit according to the present invention, an AC signal generator outputs an AC signal. A detection circuit, which is connected to a circuit to be measured, applies an AC signal to the circuit to be measured. Further, the detection circuit outputs a first signal corresponding to the composite impedance of the impedance of the circuit to be measured and a parasitic impedance. A correction circuit outputs a second signal in synchronization with the first signal. A subtraction circuit outputs a detection signal obtained by subtracting the second signal from the first signal.Type: ApplicationFiled: May 10, 2011Publication date: November 24, 2011Applicant: RENESAS ELECTRONICS CORPORATIONInventors: Yoshiaki ISHIZEKI, Jou KUDOU, Hiroaki SHIRAI
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Publication number: 20110181577Abstract: A drive circuit and drive method for lowering electrical current consumption by stopping individual operational amplifiers during writing onto pixels. The drive circuit of an embodiment of the present invention is comprised of a plurality of amplifier circuits formed for each different generated voltage potential based on a reference voltage; and a control unit for grouping a plurality of amplifier circuits to output adjacent gradation voltage into groups of two or more, and controlling individually turning single amplifier circuit and all other amplifier circuits in each group on and off.Type: ApplicationFiled: January 14, 2011Publication date: July 28, 2011Applicant: Renesas Electronics CorporationInventor: Hiroaki Shirai
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Patent number: 7629401Abstract: The present invention provides an antistatic composition including: a polymer (A) containing a monomer unit represented by the following general formula (1): where R1 represents a hydrocarbon group having a benzene ring, A represents a methyl group or an ethyl group, and a plurality of A's may be the same or different from each other, m and n, each of which is an average polymerization degree of an oxyalkylene group, each represent a numeral of 1 or more, and p represents a numeral of 2 or more; and a low-molecular-weight anionic compound (B).Type: GrantFiled: March 9, 2006Date of Patent: December 8, 2009Assignee: Adeka CorporationInventors: Tetsuji Abe, Hiroaki Shirai, Takayuki Tsuda
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Publication number: 20090109158Abstract: A driving method for driving an LCD panel having a counter electrode and a source line. In a first period, the counter electrode is driven to a potential VCOMH. In a second period, the counter electrode and the source line are short-circuited to a power supply interconnection having a power supply potential VCI. In a third period, the counter electrode is connected to a ground interconnection while the source line is kept to be short-circuited to the power supply interconnection. In a fourth period, the counter electrode is pulled down to a potential VCOML lower than a ground potential In a fifth period, the source line is driven to a potential corresponding to an image data while the counter electrode is kept to the potential VCOML. The electric power consumed in pulling down the counter electrode from a positive potential to a negative potential can be effectively reduced.Type: ApplicationFiled: October 30, 2008Publication date: April 30, 2009Applicant: NEC Electronics CorporationInventor: Hiroaki Shirai
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Publication number: 20080176979Abstract: The present invention provides an antistatic composition including: a polymer (A) containing a monomer unit represented by the following general formula (1): where R1 represents a hydrocarbon group having a benzene ring, A represents a methyl group or an ethyl group, and a plurality of A's may be the same or different from each other, m and n, each of which is an average polymerization degree of an oxyalkylene group, each represent a numeral of 1 or more, and p represents a numeral of 2 or more; and a low-molecular-weight anionic compound (B).Type: ApplicationFiled: March 9, 2006Publication date: July 24, 2008Inventors: Tetsuji Abe, Hiroaki Shirai, Takayuki Tsuda
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Publication number: 20080100605Abstract: A display apparatus includes a display panel; and a data driver configured to output drive voltages from a plurality of output nodes to drive the display panel. The data driver includes a plurality of output amplifiers, each of which is configured to receive a gradation voltage corresponding to a pixel data and to output the drive voltage in response to the gradation voltage; and a driver-side demultiplexer configured to connect the plurality of output amplifiers to selection output nodes selected from among the plurality of output nodes. The display panel includes a plurality of data lines; and a panel-side demultiplexer configured to connect selection data lines selected from among the plurality of data lines with the plurality of output nodes.Type: ApplicationFiled: October 25, 2007Publication date: May 1, 2008Applicant: NEC ELECTRONICS CORPORATIONInventors: Hiroaki Shirai, Yoshiharu Hashimoto
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Publication number: 20080043012Abstract: A method is provided for operating a display apparatus in which one source output of a source driver is connected with first to N-th data lines through first to N-th time division switches, which method includes: driving a first pixel positioned in a first horizontal line and connected with one of the first to N-th data lines, by feeding a first drive voltage to the one of the first to N-th data lines from the one source output with associated one of the first to N-th time division switches; and driving a second pixel positioned in a second horizontal line next to the first horizontal line and connected with the one of the first to N-th data lines, by feeding a second drive voltage to the one of the first to N-th data lines from the source output with associated one of the first to N-th time division switches. The associated one time division switch is kept turned on during a time period from a start time of the driving the first pixel to a start time of the driving the second pixel.Type: ApplicationFiled: August 17, 2007Publication date: February 21, 2008Applicant: NEC ELECTRONICS CORPORATIONInventor: Hiroaki Shirai
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Publication number: 20060225203Abstract: A stretcher 1 comprises a bed 21 on which a sick or injured person will be laid, legs 22 foldably provided on the bed 21, casters 23 provided at the legs 22, respectively, a tank 10 for storing high-pressure gas, pneumatic cylinders 8 and 9, and intake switches 11 and 13. When the intake switches 11 and 13 are turned ON, high-pressure gas is introduced from the tank 10 into the pneumatic cylinders 8 and 9 so that piston rods 28 are retracted. Thus, the legs 22 are given forces toward deployment so that the bed 21 is given an ascending force.Type: ApplicationFiled: March 26, 2004Publication date: October 12, 2006Applicants: ShinMaywa Industries, Ltd, SML, Ltd.Inventors: Takashi Hosoya, Shotaro Kimura, Keiichiro Kara, Hiroaki Shirai
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Patent number: 6863753Abstract: In a manufacturing apparatus for flat cable adapted for allowing plural conductive wires arranged on the same plane to be put between a first insulating tape on which first peeling sheets are stuck at predetermined intervals and a second insulating tape on which second peeling sheets are stuck at predetermined intervals to stick the first insulating tape, the conductive wires and the second insulating tape in order recited, such an approach is employed to respectively adjust tensions applied to the first and second insulating tapes to thereby respectively independently change expansions/contractions of the first and second insulating tapes. Thus, it is possible to correct sticking errors of the first peeling sheets and the second peeling sheets.Type: GrantFiled: January 20, 2000Date of Patent: March 8, 2005Assignee: Sony Chemicals CorporationInventors: Takao Murooka, Hakuji Kobayashi, Masakazu Endo, Toshihiro Tsutsumi, Hiroaki Shirai, Hidehiro Numao
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Publication number: 20020105945Abstract: An exchange changes a route of a transmission path to bypass a malfunctioning switch. The transmission path is formed in a switch network including a plurality of switches for transmitting communication information. The switch network is provided with a plurality of inputs and a plurality of outputs so that the transmission path is formed between one of the inputs and one of the outputs by routing the switches in the switch network. A malfunctioning switch detecting unit detects a location of the malfunctioning switch in the switch network. The route of the transmission path is changed by switching one of the inputs and outputs connected to the transmission path based on predetermined routing information which indicates a route to bypass the malfunctioning switch in relation to the inputs or the outputs of the switch network.Type: ApplicationFiled: January 31, 2002Publication date: August 8, 2002Inventors: Toshiyuki Iino, Hiroaki Shirai
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Patent number: 6418115Abstract: An exchange changes a route of a transmission path to bypass a malfunctioning switch. The transmission path is formed in a switch network including a plurality of switches for transmitting communication information. The switch network is provided with a plurality of inputs and a plurality of outputs so that the transmission path is formed between one of the inputs and one of the outputs by routing the switches in the switch network. A malfunctioning switch detecting unit detects a location of the malfunctioning switch in the switch network. The route of the transmission path is changed by switching one of the inputs and outputs connected to the transmission path based on predetermined routing information which indicates a route to bypass the malfunctioning switch in relation to the inputs or the outputs of the switch network.Type: GrantFiled: March 18, 1998Date of Patent: July 9, 2002Assignee: Fujitsu LimitedInventors: Toshiyuki Iino, Hiroaki Shirai
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Publication number: 20020057647Abstract: An exchange changes a route of a transmission path to bypass a malfunctioning switch. The transmission path is formed in a switch network including a plurality of switches for transmitting communication information. The switch network is provided with a plurality of inputs and a plurality of outputs so that the transmission path is formed between one of the inputs and one of the outputs by routing the switches in the switch network. A malfunctioning switch detecting unit detects a location of the malfunctioning switch in the switch network. The route of the transmission path is changed by switching one of the inputs and outputs connected to the transmission path based on predetermined routing information which indicates a route to bypass the malfunctioning switch in relation to the inputs or the outputs of the switch network.Type: ApplicationFiled: March 18, 1998Publication date: May 16, 2002Inventors: TOSHIYUKI IINO, HIROAKI SHIRAI
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Patent number: 5369633Abstract: A digital signal transmission system having monitor equipment including a serial/parallel (S/P) converter and a parallel/serial (P/S) converter both. The S/P converter is checked by the aid of a first monitor signal generating circuit that parallel distributes a pass pattern signal given at the input side of the S/P converter to respective individual channel lines for achieving a pass pattern check. The P/S converter is checked with the aid of a second monitor signal generating circuit that receives respective pass pattern signals given, at the input side of the P/S converter, to a multiplexed channel line sequentially at every frame to achieve a pass pattern check.Type: GrantFiled: May 27, 1992Date of Patent: November 29, 1994Assignee: Fujitsu LimitedInventors: Akira Maruyama, Shuji Kimura, Shigeki Yamada, Hiroaki Shirai, Hiroichi Nara, Kazunori Hanaeda