Patents by Inventor Hiroki Aizawa

Hiroki Aizawa 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).

  • Publication number: 20240140150
    Abstract: The disclosure provides a vehicle body rear structure, which can reduce damage to the vehicle during a collision from the rear. The vehicle body rear structure includes a chassis rear, a hook reinforcement part fixed to a lower surface of the chassis rear; and a hook fixed on a back side of the chassis rear through the hook reinforcement part, in which the hook reinforcement part includes a plurality of part members independent from each other, the plurality of part members are connected in series and joined in a front-back direction of the vehicle to form a joint boundary part, and the joint boundary part is disposed with a weakened part on a side close to the chassis rear.
    Type: Application
    Filed: October 23, 2023
    Publication date: May 2, 2024
    Applicant: Honda Motor Co., Ltd.
    Inventors: Kyosuke YAMAKITA, Keisakuro YAMAGUCHI, Yusuke MIURA, Masayuki Yoshida, Hiroki Kashimoto, Haruki Aizawa
  • Patent number: 11011111
    Abstract: A display driving device comprising: a high supply voltage operation unit that generates an operating current under application of a high supply voltage so as to supply driving voltages to a display panel; a low supply voltage operation unit that operates under the application of a low supply voltage lower than the high supply voltage and controls the high supply voltage operation unit; and a reuse circuit that receives the operating current from the high supply voltage operation unit and supplies the operating current to a ground side via the low supply voltage operation unit so as to apply the low supply voltage to the low supply voltage operation unit.
    Type: Grant
    Filed: February 12, 2020
    Date of Patent: May 18, 2021
    Assignee: LAPIS SEMICONDUCTOR CO., LTD.
    Inventors: Hiroyoshi Ichikura, Hiroki Aizawa, Takeshi Nosaka
  • Patent number: 10847091
    Abstract: A display driver includes a data fetching unit that fetches first to Nth pixel data pieces corresponding to luminance levels of respective pixels and outputs the same at a timing of an edge of a clock signal, first to Nth amplifiers that amplify first to Nth gradation voltages corresponding to the first to Nth pixel data piece to obtain first to Nth driving voltages, and a bias voltage generation unit that generates and supplies bias voltages for setting current values of operation currents to the respective amplifiers. The bias voltage generation unit stores a first value and a second value of the bias voltage used for setting the current value to a higher value and a lower value, and generates a bias voltage having the first value during a period from the timing of the edge of the clock signal, and switches the voltage value to the second value thereafter.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: November 24, 2020
    Assignee: LAPIS Semiconductor Co., Ltd.
    Inventor: Hiroki Aizawa
  • Publication number: 20200184891
    Abstract: A display driving device comprising: a high supply voltage operation unit that generates an operating current under application of a high supply voltage so as to supply driving voltages to a display panel; a low supply voltage operation unit that operates under the application of a low supply voltage lower than the high supply voltage and controls the high supply voltage operation unit; and a reuse circuit that receives the operating current from the high supply voltage operation unit and supplies the operating current to a ground side via the low supply voltage operation unit so as to apply the low supply voltage to the low supply voltage operation unit.
    Type: Application
    Filed: February 12, 2020
    Publication date: June 11, 2020
    Applicant: LAPIS Semiconductor Co., Ltd.
    Inventors: Hiroyoshi ICHIKURA, Hiroki AIZAWA, Takeshi NOSAKA
  • Patent number: 10580357
    Abstract: A display driving device comprising: a high supply voltage operation unit that generates an operating current under application of a high supply voltage so as to supply driving voltages to a display panel; a low supply voltage operation unit that operates under the application of a low supply voltage lower than the high supply voltage and controls the high supply voltage operation unit; and a reuse circuit that receives the operating current from the high supply voltage operation unit and supplies the operating current to a ground side via the low supply voltage operation unit so as to apply the low supply voltage to the low supply voltage operation unit.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: March 3, 2020
    Assignee: LAPIS SEMICONDUCTOR CO., LTD.
    Inventors: Hiroyoshi Ichikura, Hiroki Aizawa, Takeshi Nosaka
  • Publication number: 20190237012
    Abstract: A display driving device comprising: a high supply voltage operation unit that generates an operating current under application of a high supply voltage so as to supply driving voltages to a display panel; a low supply voltage operation unit that operates under the application of a low supply voltage lower than the high supply voltage and controls the high supply voltage operation unit; and a reuse circuit that receives the operating current from the high supply voltage operation unit and supplies the operating current to a ground side via the low supply voltage operation unit so as to apply the low supply voltage to the low supply voltage operation unit.
    Type: Application
    Filed: April 25, 2018
    Publication date: August 1, 2019
    Applicant: LAPIS Semiconductor Co., Ltd.
    Inventors: Hiroyoshi ICHIKURA, Hiroki AIZAWA, Takeshi NOSAKA
  • Publication number: 20190156756
    Abstract: A display driver includes a data fetching unit that fetches first to Nth pixel data pieces corresponding to luminance levels of respective pixels and outputs the same at a timing of an edge of a clock signal, first to Nth amplifiers that amplify first to Nth gradation voltages corresponding to the first to Nth pixel data piece to obtain first to Nth driving voltages, and a bias voltage generation unit that generates and supplies bias voltages for setting current values of operation currents to the respective amplifiers. The bias voltage generation unit stores a first value and a second value of the bias voltage used for setting the current value to a higher value and a lower value, and generates a bias voltage having the first value during a period from the timing of the edge of the clock signal, and switches the voltage value to the second value thereafter.
    Type: Application
    Filed: November 21, 2018
    Publication date: May 23, 2019
    Applicant: LAPIS Semiconductor Co., Ltd.
    Inventor: Hiroki Aizawa
  • Publication number: 20160210072
    Abstract: According to one embodiment, there is provided a controller including a memory control circuit, a host interface, and a power control circuit. The memory control circuit controls a nonvolatile semiconductor memory. The host interface performs data-format conversion between data of a host and data of the memory control circuit and generates an internal signal according to a low power instruction signal received from the host. The power control circuit performs at least one of a clock stop and a power shutdown to a power supply area including at least part of the host interface according to the internal signal received from the host interface and performs, to the power supply area, at least one of a power restoration and a clock resumption according to the low power instruction signal received from the host.
    Type: Application
    Filed: July 10, 2015
    Publication date: July 21, 2016
    Applicant: Kabushiki Kaisha Toshiba
    Inventor: Hiroki AIZAWA
  • Patent number: 9336733
    Abstract: A liquid crystal display system including: a liquid crystal display panel for displaying image data; a semiconductor device including a display driving circuit configured to drive the liquid crystal display panel, said display driving circuit having a function of generating gray scale voltages based on a gamma characteristic curve, said display driving circuit including: an interface circuit coupled to plurality of external terminals for inputting a first, second and third value which define the gamma characteristic curve; a first register configured to store the first value that adjusts an amplitude of the gamma characteristic curve; a second register configured to store the second value that adjusts a gradient of the gamma characteristic curve; a third register configured to store the third value making a micro adjustment of the gamma characteristic curve; and a generation circuit configured to generate the gray scale voltages based on the gamma characteristic curve.
    Type: Grant
    Filed: January 21, 2014
    Date of Patent: May 10, 2016
    Assignee: Renesas Electronics Corporation
    Inventors: Yasuyuki Kudo, Akihito Akai, Kazuo Ookado, Kazunari Kurokawa, Hiroki Aizawa
  • Publication number: 20140132494
    Abstract: A liquid crystal display system including: a liquid crystal display panel for displaying image data; a semiconductor device including a display driving circuit configured to drive the liquid crystal display panel, said display driving circuit having a function of generating gray scale voltages based on a gamma characteristic curve, said display driving circuit including: an interface circuit coupled to plurality of external terminals for inputting a first, second and third value which define the gamma characteristic curve; a first register configured to store the first value that adjusts an amplitude of the gamma characteristic curve; a second register configured to store the second value that adjusts a gradient of the gamma characteristic curve; a third register configured to store the third value making a micro adjustment of the gamma characteristic curve; and a generation circuit configured to generate the gray scale voltages based on the gamma characteristic curve.
    Type: Application
    Filed: January 21, 2014
    Publication date: May 15, 2014
    Applicant: Renesas Electronics Corporation
    Inventors: Yasuyuki KUDO, Akihito AKAI, Kazuo OOKADO, Kazunari KUROKAWA, Hiroki AIZAWA
  • Patent number: 8633881
    Abstract: Display driving arrangements including: generation circuit dividing a reference voltage by variable resistors for plural levels of voltages; a decoder circuit decoding gray scale voltage corresponding to the display data among the levels of voltages; and a register setting variable resisters resistance values to adjust amplitude and gradient of the gamma characteristic curve of the gray scale voltages with respect to the gray scale number, the generation circuit having a group of resistive voltage dividing circuits dividing the reference voltage, a variable resister amplitude adjusting the gamma characteristic curve in accordance with register setting values connected with a side of the reference voltage in series, being closer to the side of the reference voltage than the group of resistive voltage dividing circuits, a variable resister to adjust the gradient of the gamma characteristic curve per the register setting values connected within the group of resistive voltage dividing circuits in series.
    Type: Grant
    Filed: February 14, 2012
    Date of Patent: January 21, 2014
    Assignee: Renesas Electronics Corporation
    Inventors: Yasuyuki Kudo, Akihito Akai, Kazuo Ookado, Kazunari Kurokawa, Hiroki Aizawa
  • Publication number: 20120139972
    Abstract: Display driving arrangements including: generation circuit dividing a reference voltage by variable resistors for plural levels of voltages; a decoder circuit decoding gray scale voltage corresponding to the display data among the levels of voltages; and a register setting variable resisters resistance values to adjust amplitude and gradient of the gamma characteristic curve of the gray scale voltages with respect to the gray scale number, the generation circuit having a group of resistive voltage dividing circuits dividing the reference voltage, a variable resister amplitude adjusting the gamma characteristic curve in accordance with register setting values connected with a side of the reference voltage in series, being closer to the side of the reference voltage than the group of resistive voltage dividing circuits, a variable resister to adjust the gradient of the gamma characteristic curve per the register setting values connected within the group of resistive voltage dividing circuits in series.
    Type: Application
    Filed: February 14, 2012
    Publication date: June 7, 2012
    Inventors: Yasuyuki KUDO, Akihito AKAI, Kazuo OOKADO, Kazunari KUROKAWA, Hiroki AIZAWA
  • Patent number: 8120561
    Abstract: A display driving circuit to supply a gray scale voltage corresponding to display data to a display panel, the display driving circuit including: a generation circuit to divide a reference voltage to generate a plurality of levels of the gray scale voltages; an interface circuit; a selection circuit to select the gray scale voltage corresponding to the display data from the plurality of levels of voltages; a first register to store a setting value that adjusts the amplitude of a gamma characteristic curve from outside via the interface circuit; and a second register to store a setting value that adjusts the gradient of the gamma characteristic curve from outside via the interface circuit; and a third register to store a setting value for micro adjusting the gamma characteristic curve from outside via the interface circuit; wherein the first, second and third registers are assigned different addresses.
    Type: Grant
    Filed: March 26, 2009
    Date of Patent: February 21, 2012
    Assignee: Renesas Electronics Corporation
    Inventors: Yasuyuki Kudo, Akihito Akai, Kazuo Ookado, Kazunari Kurokawa, Hiroki Aizawa
  • Patent number: 7855537
    Abstract: A voltage supply circuit includes an output transistor causing a first current to flow to an output terminal of the voltage supply circuit based on a control voltage applied from an error amplifier to a control terminal of the output transistor; and an overcurrent protection circuit including a reference transistor causing a second current to flow to the output terminal, the second current having an amount corresponding to an amount of the first current, the overcurrent protection circuit regulating a level of the control voltage based on comparison between a detection voltage caused based on the second current and a reference voltage.
    Type: Grant
    Filed: November 6, 2007
    Date of Patent: December 21, 2010
    Assignee: NEC Electronics Corporation
    Inventor: Hiroki Aizawa
  • Patent number: 7724266
    Abstract: An image display adjusting device wherein a difference portion obtains a difference between an input signal f0 preceding by one frame as an input signal f1 held by one frame by a memory portion and a current input signal f1, a multiplication portion 106 multiplies this difference signal (f1?f0) by a highlight coefficient ?, and an addition portion 107 adds a multiplication output signal ? (f1?f0) thereof as correction data to the current input signal f1 to obtain an output signal having its responsiveness improved, the device provided with highlight coefficient controlling portions for performing predetermined decoding by inputting the input signal f1 or the difference signal (f1?f0) and converting it to a signal having a change characteristic different from that signal and outputting a highlight coefficient ? adapted to the input signal or the difference signal by using that decode value.
    Type: Grant
    Filed: November 3, 2006
    Date of Patent: May 25, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroki Aizawa, Minoru Yoneda, Toshimasa Otsuki, Kazuhiko Yamauchi
  • Patent number: 7724269
    Abstract: A display driver used in common for a first screen and a second screen. The display driver includes a data line drive circuit which supplies gray scale voltages to the first and second screens in accordance with display data via data lines in common for the first and second screens, and a scan line drive circuit which supplies scan signals to the first and second screens via scan lines, with the scan lines in the first screen being different from the scan lines in the second screen. The scan line drive circuit scans the second screen in one of a one-line-at-a-time operation and a plural-line-at-a-time operation by using the scan signals every time the scan line drive circuit scans at least one frame of the first screen in a one-line-at-a-time operation by using the scan signals.
    Type: Grant
    Filed: January 30, 2007
    Date of Patent: May 25, 2010
    Assignee: Renesas Technology Corp.
    Inventors: Yasuyuki Kudo, Kazuo Okado, Hiroki Aizawa
  • Patent number: 7616221
    Abstract: A driving circuit provided by the present invention is characterized in that the driving circuit selects a gray-scale voltage in accordance with high-order bits of display data from a group of gray-scale voltages with their voltage level varying step by step from fractional time period to fractional time period, which are set in advance, and outputs the selected gray-scale voltage during a time period between the start of a scanning period and a time at which a number assigned to a fractional time period matches quantitative information contained in low-order bits of the display data. In addition, the driving circuit provided by the present invention is also characterized in that the time ratio of the first fractional time period is set at a relatively high value while the time ratios of the second and subsequent fractional time periods are each set at a relatively low value.
    Type: Grant
    Filed: June 30, 2004
    Date of Patent: November 10, 2009
    Assignee: Renesas Technology Corp.
    Inventors: Yasuyuki Kudo, Akihito Akai, Takuya Eriguchi, Kazuo Okado, Hiroki Aizawa
  • Publication number: 20090184985
    Abstract: A display driving circuit to supply a gray scale voltage corresponding to display data to a display panel, the display driving circuit including: a generation circuit to divide a reference voltage to generate a plurality of levels of the gray scale voltages; an interface circuit; a selection circuit to select the gray scale voltage corresponding to the display data from the plurality of levels of voltages; a first register to store a setting value that adjusts the amplitude of a gamma characteristic curve from outside via the interface circuit; and a second register to store a setting value that adjusts the gradient of the gamma characteristic curve from outside via the interface circuit; and a third register to store a setting value for micro adjusting the gamma characteristic curve from outside via the interface circuit; wherein the first, second and third registers are assigned different addresses.
    Type: Application
    Filed: March 26, 2009
    Publication date: July 23, 2009
    Inventors: Yasuyuki Kudo, Akihito Akai, Kazuo Ookado, Kazunari Kurokawa, Hiroki Aizawa
  • Patent number: 7511693
    Abstract: A display driver adjustable for a gamma specification of a liquid display panel, including: a system interface receiving display data from an external; a memory storing the display data; a grayscale voltage generator generating a plurality of grayscale voltages; a gamma adjusting circuit adjusting the gamma specification; and an output circuit outputting the grayscale voltage in response to the display data from the memory to the liquid display panel, wherein the gamma adjusting circuit includes: a gradient adjustment register controlling variable resistors of a ladder resistor; an amplitude/reference adjustment register; and a micro adjustment register, wherein the gradient adjustment register, the amplitude/reference adjustment register and micro adjustment register, are independently set in accordance with red, green and blue, respectively.
    Type: Grant
    Filed: October 13, 2005
    Date of Patent: March 31, 2009
    Assignee: Renesas Technology Corp.
    Inventors: Yasuyuki Kudo, Akihito Akai, Kazuo Ookado, Kazunari Kurokawa, Hiroki Aizawa
  • Publication number: 20080106245
    Abstract: A voltage supply circuit includes an output transistor causing a first current to flow to an output terminal of the voltage supply circuit based on a control voltage applied from an error amplifier to a control terminal of the output transistor; and an overcurrent protection circuit including a reference transistor causing a second current to flow to the output terminal, the second current having an amount corresponding to an amount of the first current, the overcurrent protection circuit regulating a level of the control voltage based on comparison between a detection voltage caused based on the second current and a reference voltage.
    Type: Application
    Filed: November 6, 2007
    Publication date: May 8, 2008
    Applicant: NEC ELECTRONICS CORPORATION
    Inventor: Hiroki Aizawa