Patents by Inventor Susumu Kawashima

Susumu Kawashima 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: 20240069398
    Abstract: A display apparatus includes a data generation circuit, a source driver circuit, and a pixel. The source driver circuit is electrically connected to the pixel through first and second wirings. The pixel includes a display device that is a liquid crystal device, a potential of one electrode of the display device can be a potential of the first wiring, and a potential of the other electrode of the display device can be a potential of the second wiring. The image data generation circuit has a function of generating digital image data including first and second data. One of the first and second wirings is made to have a potential corresponding to first data, and the other of the first and second wirings is made to have a potential corresponding to the second_data. The potential of the first wiring and the potential of the second wiring are interchanged.
    Type: Application
    Filed: November 9, 2023
    Publication date: February 29, 2024
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kei Takahashi, Susumu KAWASHIMA, Koji KUSUNOKI, Kouhei TOYOTAKA, Kazunori WATANABE
  • Publication number: 20240046857
    Abstract: The power consumption of a display device is reduced. The power consumption of a driver circuit in a display device is reduced. A pixel included in the display device includes a display element. The pixel is configured to have a function of retaining a first voltage corresponding to a first input pulse signal and a function of driving the display element with a third voltage obtained by addition of a second voltage corresponding to a second input pulse signal to the first voltage.
    Type: Application
    Filed: October 17, 2023
    Publication date: February 8, 2024
    Inventors: Shunpei YAMAZAKI, Kei TAKAHASHI, Susumu KAWASHIMA, Koji KUSUNOKI, Kazunori WATANABE
  • Publication number: 20240036427
    Abstract: A high-aperture-ratio liquid crystal display device or a high-definition liquid crystal display device is provided. The display device includes a transistor including a semiconductor layer including an oxide semiconductor film, a gate insulating layer, a gate electrode, a first conductive layer, and a second conductive layer; a liquid crystal element including the second conductive layer including an oxide conductive film, a third conductive layer, and a liquid crystal; and a first insulating layer. The first insulating layer includes a first side surface over the first conductive layer. The semiconductor layer is in contact with a top surface of the first conductive layer and the first side surface. The gate insulating layer includes a portion facing the first side surface with the semiconductor layer therebetween. The gate electrode includes a portion facing the first side surface with the semiconductor layer and the gate insulating layer therebetween.
    Type: Application
    Filed: July 20, 2023
    Publication date: February 1, 2024
    Inventors: Koji KUSUNOKI, Susumu KAWASHIMA
  • Publication number: 20240028680
    Abstract: A semiconductor device including a biometric recognition function and a touch sensor or near touch sensor function is provided. The semiconductor device includes a light-emitting device and an imaging device. The imaging device includes a gate driver circuit and m rows of pixels (m is an integer more than or equal to 2). The gate driver circuit includes a plurality of first register circuits and second register circuits whose number is less than that of the first register circuits. The first register circuits are connected with each other in series and the second register circuits are connected with each other in series. The gate driver circuit has a function of operating in the first mode and the second mode. In the first mode, the first register circuits are in the on state and the second register circuits are in the off state, and in the second mode, the second register circuits are in the on state and the first register circuits are in the off state.
    Type: Application
    Filed: August 24, 2023
    Publication date: January 25, 2024
    Inventors: Satoshi YOSHIMOTO, Susumu KAWASHIMA, Koji KUSUNOKI, Kazunori WATANABE
  • Publication number: 20240021150
    Abstract: A novel display is provided. A display having a small change in chromaticity of a micro light-emitting diode in proportion to current density is provided. A display capable of reducing power consumption in the driver circuit when displaying a still image is provided. The display includes a plurality of pixels each including a display element and a microcontroller. The microcontroller includes a first transistor, a triangular wave generator circuit, a comparator, a switch, and a constant current circuit. The first transistor has a function of retaining a potential corresponding to data written to the pixel by being switched off. The triangular wave generator circuit has a function of generating a triangular wave signal. The comparator has a function of generating an output signal corresponding to the potential and the triangular wave signal.
    Type: Application
    Filed: September 26, 2023
    Publication date: January 18, 2024
    Inventors: Kei TAKAHASHI, Koji KUSUNOKI, Kazunori WATANABE, Susumu KAWASHIMA, Kouhei TOYOTAKA, Shunpei YAMAZAKI
  • Patent number: 11876098
    Abstract: A display device capable of improving image quality is provided. A storage node is provided in each pixel and first data can be held in the storage node. Second data is added to the first data by capacitive coupling, which can be supplied to a display element. Thus, the display device can display a corrected image. A reference potential for the capacitive coupling operation is supplied from a power supply line or the like, and thus the first data and the second data can be supplied from a common signal line.
    Type: Grant
    Filed: May 10, 2022
    Date of Patent: January 16, 2024
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Susumu Kawashima, Naoto Kusumoto
  • Patent number: 11869417
    Abstract: The power consumption of a display device is reduced. The power consumption of a driver circuit in a display device is reduced. A pixel included in the display device includes a display element. The pixel is configured to have a function of retaining a first voltage corresponding to a first input pulse signal and a function of driving the display element with a third voltage obtained by addition of a second voltage corresponding to a second input pulse signal to the first voltage.
    Type: Grant
    Filed: October 28, 2022
    Date of Patent: January 9, 2024
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Kei Takahashi, Susumu Kawashima, Koji Kusunoki, Kazunori Watanabe
  • Patent number: 11869428
    Abstract: A display apparatus capable of image capturing with high sensitivity is provided. The display apparatus is configured to include first to third switches, a first transistor, a second transistor, and a light-emitting/receiving element. The first switch is electrically connected to a gate of the first transistor. The second switch is positioned between one of a source and a drain of the first transistor and one electrode of the light-emitting/receiving element. The third switch is positioned between the one electrode of the light-emitting/receiving element and a gate of the second transistor. The other of the source and the drain of the first transistor is supplied with a first potential. The other electrode of the light-emitting/receiving element is supplied with a second potential. The light-emitting/receiving element has a function of emitting light of a first color and a function of receiving light of a second color.
    Type: Grant
    Filed: December 10, 2020
    Date of Patent: January 9, 2024
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Susumu Kawashima, Koji Kusunoki, Kazunori Watanabe
  • Publication number: 20240004248
    Abstract: A display device capable of improving image quality is provided. A display device includes a plurality of pixel blocks in a display region. The pixel blocks each include a first circuit and a plurality of second circuits. The first circuit has a function of adding a plurality of pieces of data supplied from a source driver. The second circuit includes a display element and has a function of performing display in accordance with the added data. One pixel has a configuration including one second circuit and an component of the first circuit that is shared. When the first circuit is shared by a plurality of pixels, the aperture ratio can be increased.
    Type: Application
    Filed: September 15, 2023
    Publication date: January 4, 2024
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Susumu KAWASHIMA, Naoto KUSUMOTO
  • Publication number: 20230412935
    Abstract: A semiconductor device capable of performing authentication in a short time can be provided. The semiconductor device includes a light-emitting unit and an imaging unit. The imaging unit includes a row driver circuit, and the row driver circuit includes first to m latch circuits (m is an integer greater than or equal to 2) and first to m register circuits. A first start pulse signal is input to a first latch circuit and second start pulse signals are input to first to m latch circuits. Scan signals output from the first to (m?1)-th register circuits are input to the second to m-th latch circuits, respectively. The first latch circuit has a function of outputting one of the first start pulse signal and the second start pulse signal to the first register circuit on the basis of data held, and the second to m-th latch circuits have a function of outputting one of the scan signal and the second start pulse signal to the second to m-th register circuits on the basis of data held.
    Type: Application
    Filed: October 26, 2021
    Publication date: December 21, 2023
    Inventors: Kazunori WATANABE, Satoshi YOSHIMOTO, Koji KUSUNOKI, Susumu KAWASHIMA, Motoharu SAITO
  • Publication number: 20230400740
    Abstract: A display device with a high aperture ratio is provided. The display device includes, in a pixel, a first transistor, a second transistor, a first insulating layer, a second insulating layer, a conductive layer, a pixel electrode, a layer containing a liquid crystal material, and a common electrode. The first insulating layer is positioned over a channel formation region of the first transistor. The conductive layer is positioned over the first insulating layer. The second insulating layer is positioned over the first transistor, the second transistor, the first insulating layer, and the conductive layer. The pixel electrode is positioned over the second insulating layer, the layer containing a liquid crystal material is positioned over the pixel electrode, and the common electrode is positioned over the layer containing a liquid crystal material. The common electrode overlaps with the conductive layer with the layer containing a liquid crystal material and the pixel electrode therebetween.
    Type: Application
    Filed: August 15, 2023
    Publication date: December 14, 2023
    Inventors: Shunpei YAMAZAKI, Koji KUSUNOKI, Susumu KAWASHIMA, Daisuke KUBOTA, Tetsuji ISHITANI, Akio YAMASHITA
  • Patent number: 11842705
    Abstract: A display apparatus with low-power consumption is provided. The display apparatus includes an inverter circuit and a pixel having a function of adding data, and the inverter circuit has a function of inverting data supplied from a source driver. The inverter circuit has a function of inverting data supplied from a source driver. The pixel has a function of adding data supplied from the source driver and the inverter circuit. Accordingly, the pixel can generate a voltage several times higher than the output voltage of the source driver and can supply the voltage to a display device. With such a structure, the output voltage of the source driver can be lowered, so that a display apparatus with low power consumption can be achieved.
    Type: Grant
    Filed: June 21, 2022
    Date of Patent: December 12, 2023
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Susumu Kawashima, Koji Kusunoki, Kazunori Watanabe, Naoto Kusumoto
  • Publication number: 20230395022
    Abstract: One embodiment of the present invention relates to a common semiconductor apparatus for driving two different circuits. The semiconductor apparatus is capable of switching a plurality of signal potentials and sequentially outputting the plurality of signal potentials to the outside. The semiconductor apparatus can make one of two different circuits arranged in a matrix operate in all the rows and can make the other circuit operate in all the rows or only in a specific row. For example, in the case where the semiconductor apparatus is applied to a row driver that drives pixels of a display device in which sensor elements are incorporated, the operation of display elements in pixels in all the rows and the operation of sensor elements in pixels in all the rows or in the specific row can be switched.
    Type: Application
    Filed: October 18, 2021
    Publication date: December 7, 2023
    Inventors: Satoshi YOSHIMOTO, Koji KUSUNOKI, Kazunori WATANABE, Susumu KAWASHIMA
  • Patent number: 11822198
    Abstract: A display device capable of improving the image quality is provided. The display device includes a pixel in which a first node, a second node, a third node, and a display element are provided, and the same image data is written to the first node and the second node first. Then, at the same time when the image data is read from the second node to the third node, the image data is added to the image data in the first node by capacitive coupling. This operation enables a data potential higher than or equal to the output voltage of a source driver to be supplied to the display element.
    Type: Grant
    Filed: December 16, 2021
    Date of Patent: November 21, 2023
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Susumu Kawashima, Naoto Kusumoto
  • Patent number: 11825220
    Abstract: An imaging device including a miniaturized pixel is provided. A pixel is provided with a photoelectric conversion element, a first transistor, a second transistor, and a capacitor. One electrode of the photoelectric conversion element is electrically connected to one of a source and a drain of the first transistor. The other of the source and the drain of the first transistor is electrically connected to a gate of the second transistor. The gate of the second transistor is electrically connected to one electrode of the capacitor. In a first period, a first potential is supplied to the other electrode of the capacitor and the first transistor is set in an on state so that imaging data corresponding to illuminance of light delivered to the photoelectric conversion element is written to the pixel. Furthermore, in a second period, a second potential is supplied to the other electrode of the capacitor so that the imaging data is read from the pixel.
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: November 21, 2023
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kazunori Watanabe, Susumu Kawashima
  • Publication number: 20230369344
    Abstract: A semiconductor device including a first transistor, a second transistor, and an insulating layer is provided. The first transistor includes a first semiconductor layer and a first conductive layer. The second transistor includes a second semiconductor layer and a second conductive layer. The insulating layer includes a first side surface over the first conductive layer and a second side surface over the second conductive layer. A gate insulating layer includes a portion facing the first side surface with the first semiconductor layer therebetween and a portion facing the second side surface with the second semiconductor layer therebetween. A gate electrode includes a portion facing the first side surface with the gate insulating layer and the first semiconductor layer therebetween and a portion facing the second side surface with the gate insulating layer and the second semiconductor layer therebetween. The first semiconductor layer is electrically connected to the second semiconductor layer.
    Type: Application
    Filed: April 28, 2023
    Publication date: November 16, 2023
    Inventors: Koji KUSUNOKI, Susumu KAWASHIMA, Hideaki SHISHIDO, Tomoaki ATSUMI, Motoharu SAITO
  • Patent number: 11817053
    Abstract: A display device that can easily achieve higher definition is provided The display device includes a pixel, a first wiring, and a second wiring. The pixel includes first to fourth transistors, a first capacitor, and a light-emitting element. One of a source and a drain of the first transistor is connected to the first wiring, and the other of the source and the drain of the first transistor is connected to a gate of the second transistor and to the first capacitor. The light-emitting element is connected to one of a source and a drain of the second transistor. The first wiring is supplied with a first data potential. The second wiring is supplied with a second data potential and a reset potential in different periods. The third transistor supplies the second data potential to the first capacitor. The fourth transistor supplies the reset potential to the light-emitting element.
    Type: Grant
    Filed: April 27, 2022
    Date of Patent: November 14, 2023
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kazunori Watanabe, Susumu Kawashima, Koji Kusunoki
  • Patent number: 11815775
    Abstract: The display apparatus includes a data generation circuit, a source driver circuit, and a pixel. The source driver circuit is electrically connected to the pixel through first and second wirings. The pixel includes a display device that is a liquid crystal device, a potential of one electrode of the display device can be a potential of the first wiring, and a potential of the other electrode of the display device can be a potential of the second wiring. The image data generation circuit has a function of generating digital image data including first and second data. One of the first and second wirings is made to have a potential corresponding to first data, and the other of the first and second wirings is made to have a potential corresponding to the second data. The potential of the first wiring and the potential of the second wiring are interchanged.
    Type: Grant
    Filed: June 10, 2022
    Date of Patent: November 14, 2023
    Inventors: Kei Takahashi, Susumu Kawashima, Koji Kusunoki, Kouhei Toyotaka, Kazunori Watanabe
  • Publication number: 20230350256
    Abstract: A liquid crystal display device with a high aperture ratio is provided. The display device includes a transistor, a first insulating layer, a second insulating layer, a third insulating layer, a first conductive layer, a pixel electrode, a common electrode, and a liquid crystal layer in a pixel. The first insulating layer is positioned over a channel formation region of the transistor. The first conductive layer is positioned over the first insulating layer. The second insulating layer is positioned over the transistor, the first insulating layer, and the first conductive layer. The pixel electrode is positioned over the second insulating layer, the third insulating layer is positioned over the pixel electrode, the common electrode is positioned over the third insulating layer, and the liquid crystal layer is positioned over the common electrode. The common electrode includes a region overlapping with the first conductive layer with the pixel electrode positioned therebetween.
    Type: Application
    Filed: May 26, 2023
    Publication date: November 2, 2023
    Inventors: Kouhei TOYOTAKA, Kazunori WATANABE, Susumu KAWASHIMA, Kei TAKAHASHI, Koji KUSUNOKI, Masataka NAKADA, Ami SATO
  • Patent number: 11798492
    Abstract: A display device capable of improving image quality is provided. The display device is provided with an adder circuit in and outside a display region, and the adder circuit has a function of adding a plurality of data supplied from a source driver together. Components of the adder circuit are divided and partly arranged in the display region. Thus, limitation on the size of the component included in the adder circuit can be eased, and data addition can be performed efficiently. In addition, by providing other components included in the adder circuit outside the display region, the number of wirings in the display region can be reduced and the aperture ratio of the pixel can be increased.
    Type: Grant
    Filed: August 23, 2022
    Date of Patent: October 24, 2023
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Susumu Kawashima, Naoto Kusumoto