Patents by Inventor Junichi Yamashita

Junichi Yamashita 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: 20250031474
    Abstract: To provide a technique for improving image quality. A light detection apparatus includes: a semiconductor layer including a first surface and a second surface mutually positioned on opposite sides in a thickness direction; a plurality of photoelectric conversion regions provided on the semiconductor layer so as to be adjacent to each other via a separation region that stretches in the thickness direction of the semiconductor layer; a transistor provided for each of the photoelectric conversion regions on the side of the first surface of the semiconductor layer; and a transparent electrode which is provided on the side of the second surface of the semiconductor layer and to which a potential is applied. In addition, the separation region includes a conductor which stretches in the thickness direction of the semiconductor layer and the conductor is electrically connected on the side of the second surface of the semiconductor layer to the transparent electrode.
    Type: Application
    Filed: November 28, 2022
    Publication date: January 23, 2025
    Inventors: TAKAFUMI MORIKAWA, KENGO NAGATA, TOMOMI ITO, ATSUSHI MASAGAKI, KAZUYOSHI YAMASHITA, SHOTA MATSUYAMA, AKIRA DAICHO, KAZUHIRO YONEDA, JUNICHI MATSUO, YUTA NAKAMOTO, HIROSHI FUKUNAGA, KYOSUKE ITO, YUSUKE OTAKE, TOSHIFUMI WAKANO
  • Patent number: 12112698
    Abstract: A pixel circuit, display device, and method of driving a pixel circuit enabling source-follower output with no deterioration of luminance even with a change of the current-voltage characteristic of the light emitting element along with elapse, enabling a source-follower circuit of n-channel transistors, and able to use an n-channel transistor as an EL drive transistor while using current anode-cathode electrodes. The circuit includes a source of a TFT used as a drive transistor that is connected to an anode of a light emitting element, and a drain of the TFT is connected to a power source potential. A capacitor is connected between a gate and source of the TFT, and a source potential of the TFT is connected to a fixed potential through a TFT used as a switching transistor.
    Type: Grant
    Filed: October 31, 2022
    Date of Patent: October 8, 2024
    Assignee: Sony Group Corporation
    Inventors: Katsuhide Uchino, Junichi Yamashita, Tetsuro Yamamoto
  • Patent number: 12051367
    Abstract: A pixel circuit able to prevent a spread of the terminal voltages of drive transistors inside a panel and in turn able to reliably prevent deterioration of uniformity, wherein a source of a TFT serving as a drive transistor is connected to an anode of a light emitting element, a drain is connected to a power source potential, a capacitor is connected between a gate and source of the TFT, and a source potential of the TFT is connected to a fixed potential through a TFT serving as a switch transistor and wherein pixel circuit lines are connected by an upper line and bottom line and are arranged in parallel with pixel circuit power source voltage lines so as not to have intersecting parts.
    Type: Grant
    Filed: June 29, 2022
    Date of Patent: July 30, 2024
    Assignee: Sony Group Corporation
    Inventors: Katsuhide Uchino, Junichi Yamashita, Tetsuro Yamamoto
  • Publication number: 20240234348
    Abstract: Provided is a semiconductor device with higher reliability and longer life which can suppress an increase in production costs. A semiconductor device includes: a semiconductor element; a top electrode on an upper surface of the semiconductor element; and a conductive metal plate containing copper as a main component and solid-state diffusion bonded to the top electrode of the semiconductor element.
    Type: Application
    Filed: July 26, 2023
    Publication date: July 11, 2024
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yasunari HINO, Junichi YAMASHITA, Koji TANAKA, Tomohide TERASHIMA, Shinichi IZUO
  • Patent number: 12027116
    Abstract: A display device including: a plurality of sub-pixels arranged in a matrix, each including an electro-optical element having a structure in which a display functional layer is sandwiched between an upper electrode and a lower electrode; and an auxiliary interconnect contact in a pixel area in which the plurality of sub-pixels are arranged in a matrix and electrically connecting the upper electrode to an auxiliary interconnect, wherein m (m is an integer equal to or larger than two) sub-pixels adjacent to each other along an arrangement direction of the sub-pixels are regarded as one group, and n (n is a natural number smaller than m) auxiliary interconnect contacts are formed for each group.
    Type: Grant
    Filed: November 30, 2022
    Date of Patent: July 2, 2024
    Assignee: SONY CORPORATION
    Inventors: Junichi Yamashita, Katsuhide Uchino
  • Publication number: 20240136309
    Abstract: Provided is a semiconductor device with higher reliability and longer life which can suppress an increase in production costs. A semiconductor device includes: a semiconductor element; a top electrode on an upper surface of the semiconductor element; and a conductive metal plate containing copper as a main component and solid-state diffusion bonded to the top electrode of the semiconductor element.
    Type: Application
    Filed: July 25, 2023
    Publication date: April 25, 2024
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yasunari HINO, Junichi YAMASHITA, Koji TANAKA, Tomohide TERASHIMA, Shinichi IZUO
  • Patent number: 11790836
    Abstract: A display module including a display panel comprising a plurality of pixels each comprising a plurality of sub pixels, the pixels being disposed on a plurality of row lines of the display panel and a driver. The driver being configured to apply a pulse width modulation (PWM) data voltage to the sub pixels in a sequential order of the row lines; and drive the display panel such that the sub pixels included in a plurality of consecutive row lines among the plurality of row lines emit light, in the sequential order of the row lines, for a time corresponding to the applied PWM data voltage.
    Type: Grant
    Filed: June 24, 2022
    Date of Patent: October 17, 2023
    Assignees: SAMSUNG ELECTRONICS CO., LTD., RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITY
    Inventors: Jinho Kim, Yong-Sang Kim, Daisuke Kawae, Junichi Yamashita, Takashige Fujimori, Donggun Oh, Jongsu Oh, Tetsuya Shigeta
  • Patent number: 11776465
    Abstract: A display module is provided. The display module includes a module substrate; a plurality of pixels provided on an upper surface of the module substrate; and a plurality of micro pixel controllers, each of the plurality of micro pixel controllers being configured to control at least two pixels among the plurality of pixels and being provided in a space between the at least two pixels on the upper surface of the module substrate, wherein at least one of the plurality of micro pixel controllers includes a slope waveform generator configured to generate a slope waveform used to control a brightness of each of the at least two pixels.
    Type: Grant
    Filed: June 3, 2022
    Date of Patent: October 3, 2023
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sangyoung Park, Daisuke Kawae, Junichi Yamashita, Jongsu Oh, Hoseop Lee, Tetsuya Shigeta
  • Patent number: 11715413
    Abstract: A display module includes a plurality of pixels; a substrate; a plurality of inorganic LEDs arranged on the substrate, each of the plurality of pixels including two or more inorganic LEDs among the plurality of inorganic LEDs; and a plurality of micro-pixel controllers two-dimensionally arranged in a first direction and a second direction on the substrate, each of the plurality of micro-pixel controllers being configured to control two or more pixels among the plurality of pixels. Each micro-pixel controller of the plurality of micro-pixel controllers is electrically connected to micro-pixel controllers adjacent thereto, and is configured to convert a voltage input from one of the micro-pixel controllers that is electrically connected thereto in a direction opposite to the first direction into a target voltage and supply the target voltage to another micro-pixel controller of the micro-pixel controllers that is electrically connected thereto in the first direction.
    Type: Grant
    Filed: February 18, 2022
    Date of Patent: August 1, 2023
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jongsu Oh, Daisuke Kawae, Junichi Yamashita, Sangyoung Park, Hoseop Lee, Tetsuya Shigeta
  • Publication number: 20230178018
    Abstract: A display device includes a pixel array unit formed by disposing pixel circuits having a P-channel type drive transistor that drives a light-emitting unit, a sampling transistor that applies a signal voltage, a light emission control transistor that controls emission/non-emission of the light-emitting unit, a storage capacitor that is connected between a gate electrode and a source electrode of the drive transistor and an auxiliary capacitor that is connected to the source electrode, and a drive unit that, during threshold correction, respectively applies a first voltage and a second voltage to the source electrode of the drive transistor and the gate electrode thereof, the difference between the first voltage and the second voltage being less than a threshold voltage of the drive transistor, and subsequently performs driving that applies a standard voltage used in threshold correction to the gate electrode when the source electrode is in a floating state.
    Type: Application
    Filed: September 6, 2022
    Publication date: June 8, 2023
    Inventors: Yusuke Onoyama, Junichi Yamashita, Naobumi Toyomura
  • Publication number: 20230091149
    Abstract: A display device including: a plurality of sub-pixels arranged in a matrix, each including an electro-optical element having a structure in which a display functional layer is sandwiched between an upper electrode and a lower electrode; and an auxiliary interconnect contact in a pixel area in which the plurality of sub-pixels are arranged in a matrix and electrically connecting the upper electrode to an auxiliary interconnect, wherein m (m is an integer equal to or larger than two) sub-pixels adjacent to each other along an arrangement direction of the sub-pixels are regarded as one group, and n (n is a natural number smaller than m) auxiliary interconnect contacts are formed for each group.
    Type: Application
    Filed: November 30, 2022
    Publication date: March 23, 2023
    Applicant: Sony Corporation
    Inventors: Junichi Yamashita, Katsuhide Uchino
  • Publication number: 20230048033
    Abstract: A pixel circuit, display device, and method of driving a pixel circuit enabling source-follower output with no deterioration of luminance even with a change of the current-voltage characteristic of the light emitting element along with elapse, enabling a source-follower circuit of n-channel transistors, and able to use an n-channel transistor as an EL drive transistor while using current anode-cathode electrodes. The circuit includes a source of a TFT used as a drive transistor that is connected to an anode of a light emitting element, and a drain of the TFT is connected to a power source potential. A capacitor is connected between a gate and source of the TFT, and a source potential of the TFT is connected to a fixed potential through a TFT used as a switching transistor.
    Type: Application
    Filed: October 31, 2022
    Publication date: February 16, 2023
    Applicant: Sony Group Corporation
    Inventors: Katsuhide UCHINO, Junichi YAMASHITA, Tetsuro YAMAMOTO
  • Patent number: 11545087
    Abstract: A display device including: a plurality of sub-pixels arranged in a matrix, each including an electro-optical element having a structure in which a display functional layer is sandwiched between an upper electrode and a lower electrode; and an auxiliary interconnect contact in a pixel area in which the plurality of sub-pixels are arranged in a matrix and electrically connecting the upper electrode to an auxiliary interconnect, wherein m (m is an integer equal to or larger than two) sub-pixels adjacent to each other along an arrangement direction of the sub-pixels are regarded as one group, and n (n is a natural number smaller than m) auxiliary interconnect contacts are formed for each group.
    Type: Grant
    Filed: June 8, 2021
    Date of Patent: January 3, 2023
    Assignee: SONY CORPORATION
    Inventors: Junichi Yamashita, Katsuhide Uchino
  • Patent number: 11545074
    Abstract: A display device includes a plurality of pixel circuits each including: a light-emitting element; a pulse width modulation (PWM) controller configured to control whether to supply current to the light-emitting element; and a constant current controller configured to supply the current to the light-emitting element, wherein the constant current controller, the PWM controller, and the light-emitting element are connected in series between a first power line and a second power line to supply the current to the light-emitting element; and a transistor configured to turn off the light-emitting element during a constant current setting period is provided between the first power line and the constant current controller.
    Type: Grant
    Filed: October 2, 2019
    Date of Patent: January 3, 2023
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Junichi Yamashita, Daisuke Kawae, Shinji Yamashita
  • Publication number: 20220328005
    Abstract: A pixel circuit able to prevent a spread of the terminal voltages of drive transistors inside a panel and in turn able to reliably prevent deterioration of uniformity, wherein a source of a TFT serving as a drive transistor is connected to an anode of a light emitting element, a drain is connected to a power source potential, a capacitor is connected between a gate and source of the TFT, and a source potential of the TFT is connected to a fixed potential through a TFT serving as a switch transistor and wherein pixel circuit lines are connected by an upper line and bottom line and are arranged in parallel with pixel circuit power source voltage lines so as not to have intersecting parts.
    Type: Application
    Filed: June 29, 2022
    Publication date: October 13, 2022
    Applicant: Sony Group Corporation
    Inventors: Katsuhide UCHINO, Junichi YAMASHITA, Tetsuro YAMAMOTO
  • Publication number: 20220327995
    Abstract: A display module including a display panel comprising a plurality of pixels each comprising a plurality of sub pixels, the pixels being disposed on a plurality of row lines of the display panel and a driver. The driver being configured to apply a pulse width modulation (PWM) data voltage to the sub pixels in a sequential order of the row lines; and drive the display panel such that the sub pixels included in a plurality of consecutive row lines among the plurality of row lines emit light, in the sequential order of the row lines, for a time corresponding to the applied PWM data voltage.
    Type: Application
    Filed: June 24, 2022
    Publication date: October 13, 2022
    Applicants: SAMSUNG ELECTRONICS CO., LTD., RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITY
    Inventors: Jinho KIM, Yong-Sang KIM, Daisuke KAWAE, Junichi YAMASHITA, Takashige FUJIMORI, Donggun OH, Jongsu OH, Tetsuya SHIGETA
  • Patent number: 11462159
    Abstract: A display device includes a pixel array unit formed by disposing pixel circuits having a P-channel type drive transistor that drives a light-emitting unit, a sampling transistor that applies a signal voltage, a light emission control transistor that controls emission/non-emission of the light-emitting unit, a storage capacitor that is connected between a gate electrode and a source electrode of the drive transistor and an auxiliary capacitor that is connected to the source electrode, and a drive unit that, during threshold correction, respectively applies a first voltage and a second voltage to the source electrode of the drive transistor and the gate electrode thereof, the difference between the first voltage and the second voltage being less than a threshold voltage of the drive transistor, and subsequently performs driving that applies a standard voltage used in threshold correction to the gate electrode when the source electrode is in a floating state.
    Type: Grant
    Filed: March 12, 2020
    Date of Patent: October 4, 2022
    Assignee: Sony Group Corporation
    Inventors: Yusuke Onoyama, Junichi Yamashita, Naobumi Toyomura
  • Publication number: 20220301498
    Abstract: A display module is provided. The display module includes a module substrate; a plurality of pixels provided on an upper surface of the module substrate; and a plurality of micro pixel controllers, each of the plurality of micro pixel controllers being configured to control at least two pixels among the plurality of pixels and being provided in a space between the at least two pixels on the upper surface of the module substrate, wherein at least one of the plurality of micro pixel controllers includes a slope waveform generator configured to generate a slope waveform used to control a brightness of each of the at least two pixels.
    Type: Application
    Filed: June 3, 2022
    Publication date: September 22, 2022
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sangyoung PARK, Daisuke KAWAE, Junichi YAMASHITA, Jongsu OH, Hoseop LEE, Tetsuya SHIGETA
  • Patent number: 11398181
    Abstract: A display module including a display panel comprising a plurality of pixels each comprising a plurality of sub pixels, the pixels being disposed on a plurality of row lines of the display panel and a driver. The driver being configured to apply a pulse width modulation (PWM) data voltage to the sub pixels in a sequential order of the row lines; and drive the display panel such that the sub pixels included in a plurality of consecutive row lines among the plurality of row lines emit light, in the sequential order of the row lines, for a time corresponding to the applied PWM data voltage.
    Type: Grant
    Filed: January 4, 2021
    Date of Patent: July 26, 2022
    Assignees: SAMSUNG ELECTRONICS CO., LTD., RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITY
    Inventors: Jinho Kim, Yong-Sang Kim, Daisuke Kawae, Junichi Yamashita, Takashige Fujimori, Donggun Oh, Jongsu Oh, Tetsuya Shigeta
  • Publication number: 20220172674
    Abstract: A display module includes a plurality of pixels; a substrate; a plurality of inorganic LEDs arranged on the substrate, each of the plurality of pixels including two or more inorganic LEDs among the plurality of inorganic LEDs; and a plurality of micro-pixel controllers two-dimensionally arranged in a first direction and a second direction on the substrate, each of the plurality of micro-pixel controllers being configured to control two or more pixels among the plurality of pixels. Each micro-pixel controller of the plurality of micro-pixel controllers is electrically connected to micro-pixel controllers adjacent thereto, and is configured to convert a voltage input from one of the micro-pixel controllers that is electrically connected thereto in a direction opposite to the first direction into a target voltage and supply the target voltage to another micro-pixel controller of the micro-pixel controllers that is electrically connected thereto in the first direction.
    Type: Application
    Filed: February 18, 2022
    Publication date: June 2, 2022
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jongsu OH, Daisuke KAWAE, Junichi YAMASHITA, Sangyoung PARK, Hoseop LEE, Tetsuya SHIGETA