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).

  • Patent number: 8294652
    Abstract: 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: Grant
    Filed: October 30, 2008
    Date of Patent: October 23, 2012
    Assignee: Renesas Electronics Corporation
    Inventor: Hiroaki Shirai
  • Patent number: 8068083
    Abstract: 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: Grant
    Filed: October 25, 2007
    Date of Patent: November 29, 2011
    Assignee: Renesas Electronics Corporation
    Inventors: Hiroaki Shirai, Yoshiharu Hashimoto
  • Publication number: 20110285407
    Abstract: 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: Application
    Filed: May 10, 2011
    Publication date: November 24, 2011
    Applicant: RENESAS ELECTRONICS CORPORATION
    Inventors: Yoshiaki ISHIZEKI, Jou KUDOU, Hiroaki SHIRAI
  • Publication number: 20110181577
    Abstract: 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: Application
    Filed: January 14, 2011
    Publication date: July 28, 2011
    Applicant: Renesas Electronics Corporation
    Inventor: Hiroaki Shirai
  • Patent number: 7629401
    Abstract: 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: Grant
    Filed: March 9, 2006
    Date of Patent: December 8, 2009
    Assignee: Adeka Corporation
    Inventors: Tetsuji Abe, Hiroaki Shirai, Takayuki Tsuda
  • Publication number: 20090109158
    Abstract: 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: Application
    Filed: October 30, 2008
    Publication date: April 30, 2009
    Applicant: NEC Electronics Corporation
    Inventor: Hiroaki Shirai
  • Publication number: 20080176979
    Abstract: 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: Application
    Filed: March 9, 2006
    Publication date: July 24, 2008
    Inventors: Tetsuji Abe, Hiroaki Shirai, Takayuki Tsuda
  • Publication number: 20080100605
    Abstract: 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: Application
    Filed: October 25, 2007
    Publication date: May 1, 2008
    Applicant: NEC ELECTRONICS CORPORATION
    Inventors: Hiroaki Shirai, Yoshiharu Hashimoto
  • Publication number: 20080043012
    Abstract: 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: Application
    Filed: August 17, 2007
    Publication date: February 21, 2008
    Applicant: NEC ELECTRONICS CORPORATION
    Inventor: Hiroaki Shirai
  • Publication number: 20060225203
    Abstract: 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: Application
    Filed: March 26, 2004
    Publication date: October 12, 2006
    Applicants: ShinMaywa Industries, Ltd, SML, Ltd.
    Inventors: Takashi Hosoya, Shotaro Kimura, Keiichiro Kara, Hiroaki Shirai
  • Patent number: 6863753
    Abstract: 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: Grant
    Filed: January 20, 2000
    Date of Patent: March 8, 2005
    Assignee: Sony Chemicals Corporation
    Inventors: Takao Murooka, Hakuji Kobayashi, Masakazu Endo, Toshihiro Tsutsumi, Hiroaki Shirai, Hidehiro Numao
  • Publication number: 20020105945
    Abstract: 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: Application
    Filed: January 31, 2002
    Publication date: August 8, 2002
    Inventors: Toshiyuki Iino, Hiroaki Shirai
  • Patent number: 6418115
    Abstract: 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: Grant
    Filed: March 18, 1998
    Date of Patent: July 9, 2002
    Assignee: Fujitsu Limited
    Inventors: Toshiyuki Iino, Hiroaki Shirai
  • Publication number: 20020057647
    Abstract: 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: Application
    Filed: March 18, 1998
    Publication date: May 16, 2002
    Inventors: TOSHIYUKI IINO, HIROAKI SHIRAI
  • Patent number: 5369633
    Abstract: 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: Grant
    Filed: May 27, 1992
    Date of Patent: November 29, 1994
    Assignee: Fujitsu Limited
    Inventors: Akira Maruyama, Shuji Kimura, Shigeki Yamada, Hiroaki Shirai, Hiroichi Nara, Kazunori Hanaeda