Patents by Inventor Yasuhiko Yamagishi

Yasuhiko Yamagishi 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: 11942048
    Abstract: A display device includes: a display panel with pixels; a dimming panel with dimming pixels; and a light source. When a pixel is controlled to be lit in white and a predetermined condition is satisfied, a blurring region is formed, and light from the light source is transmitted through the blurring region and the pixel. When a pixel is controlled to be lit up in white and the predetermined condition is not satisfied, the blurring region is not formed, the dimming pixel overlapping the pixel on a straight line along a direction in which the display panel faces the dimming panel is controlled to transmit light, and light from the light source is transmitted through the dimming pixel and the pixel. The predetermined condition is satisfied when the pixel controlled to be lit in white is at a predetermined distance or farther from an outer edge of a display area.
    Type: Grant
    Filed: April 11, 2023
    Date of Patent: March 26, 2024
    Assignee: Japan Display Inc.
    Inventors: Tomoyuki Ishihara, Tomohide Oohira, Yasuhiko Yamagishi
  • Publication number: 20230335070
    Abstract: A display device includes: a display panel with pixels; a dimming panel with dimming pixels; and a light source. When a pixel is controlled to be lit in white and a predetermined condition is satisfied, a blurring region is formed, and light from the light source is transmitted through the blurring region and the pixel. When a pixel is controlled to be lit up in white and the predetermined condition is not satisfied, the blurring region is not formed, the dimming pixel overlapping the pixel on a straight line along a direction in which the display panel faces the dimming panel is controlled to transmit light, and light from the light source is transmitted through the dimming pixel and the pixel. The predetermined condition is satisfied when the pixel controlled to be lit in white is at a predetermined distance or farther from an outer edge of a display area.
    Type: Application
    Filed: April 11, 2023
    Publication date: October 19, 2023
    Inventors: Tomoyuki ISHIHARA, Tomohide OOHIRA, Yasuhiko YAMAGISHI
  • Publication number: 20230194945
    Abstract: According to one embodiment, a display device includes a liquid crystal display panel including a first effective area and a first non-display area, a dimming panel including a second effective area and a second non-display area, a plurality of first pixels provided in matrix in first and second directions intersecting each other in the first effective area, and a plurality of second pixels provided in matrix in the first direction and the second direction in the second effective area. Of the second pixels, the outermost pixel adjacent to the second non-display area overlaps the first non-display area.
    Type: Application
    Filed: December 20, 2022
    Publication date: June 22, 2023
    Applicant: Japan Display Inc.
    Inventors: Shimon ITAKURA, Yasuhiko YAMAGISHI, Tomohide OOHIRA
  • Publication number: 20230074702
    Abstract: According to one embodiment, a flat portion is provided between a first printed circuit and a second printed circuit, and a wall portion of a frame holds and fixes the first flexible printed circuit and the second flexible printed circuit, and thus the first flexible printed circuit and the second flexible printed circuit extend along the wall portion, and a second curvature of the second flexible printed circuit is smaller than a first curvature of the first flexible printed circuit.
    Type: Application
    Filed: September 9, 2022
    Publication date: March 9, 2023
    Applicant: Japan Display Inc.
    Inventors: Shimon ITAKURA, Tomohide OOHIRA, Yasuhiko YAMAGISHI
  • Publication number: 20230008073
    Abstract: According to one embodiment, a display device comprises a display panel, first and second driver chips. The display panel includes first and second edge portions, a display area between the first and second edge portions in a first direction, first signal lines extending to the display area, and second signal lines extending to the display area. The first driver chip is connected to the first edge portion to supply video signals to the first signal lines. The second driver chip is connected to the second edge portion to supply video signals to the second signal lines. Number N of the first signal lines and number M of the second signal lines are alternately arranged in a second direction.
    Type: Application
    Filed: July 7, 2022
    Publication date: January 12, 2023
    Applicant: Japan Display Inc.
    Inventors: Tomohide OOHIRA, Yasuhiko YAMAGISHI
  • Patent number: 11373617
    Abstract: According to one embodiment, a display device, includes a display panel which includes divided display areas, signal line drivers, circuit boards which include a master board, power supply circuits, gradation voltage generation circuits, and at least one connection line, all the gradation voltage generation circuits generating the gradation voltages corresponding to a reference voltage supplied from the power supply circuit provided on the master board.
    Type: Grant
    Filed: September 29, 2020
    Date of Patent: June 28, 2022
    Assignee: Japan Display Inc.
    Inventor: Yasuhiko Yamagishi
  • Publication number: 20210012744
    Abstract: According to one embodiment, a display device, includes a display panel which includes divided display areas, signal line drivers, circuit boards which include a master board, power supply circuits, gradation voltage generation circuits, and at least one connection line, all the gradation voltage generation circuits generating the gradation voltages corresponding to a reference voltage supplied from the power supply circuit provided on the master board.
    Type: Application
    Filed: September 29, 2020
    Publication date: January 14, 2021
    Applicant: Japan Display Inc.
    Inventor: Yasuhiko YAMAGISHI
  • Patent number: 10839768
    Abstract: According to one embodiment, a display device, includes a display panel which includes divided display areas, signal line drivers, circuit boards which include a master board, power supply circuits, gradation voltage generation circuits, and at least one connection line, all the gradation voltage generation circuits generating the gradation voltages corresponding to a reference voltage supplied from the power supply circuit provided on the master board.
    Type: Grant
    Filed: October 22, 2019
    Date of Patent: November 17, 2020
    Assignee: Japan Display Inc.
    Inventor: Yasuhiko Yamagishi
  • Publication number: 20200051521
    Abstract: According to one embodiment, a display device, includes a display panel which includes divided display areas, signal line drivers, circuit boards which include a master board, power supply circuits, gradation voltage generation circuits, and at least one connection line, all the gradation voltage generation circuits generating the gradation voltages corresponding to a reference voltage supplied from the power supply circuit provided on the master board.
    Type: Application
    Filed: October 22, 2019
    Publication date: February 13, 2020
    Applicant: Japan Display Inc.
    Inventor: Yasuhiko YAMAGISHI
  • Patent number: 10497332
    Abstract: According to one embodiment, a display device, includes a display panel which includes divided display areas, signal line drivers, circuit boards which include a master board, power supply circuits, gradation voltage generation circuits, and at least one connection line, all the gradation voltage generation circuits generating the gradation voltages corresponding to a reference voltage supplied from the power supply circuit provided on the master board.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: December 3, 2019
    Assignee: Japan Display Inc.
    Inventor: Yasuhiko Yamagishi
  • Publication number: 20170011702
    Abstract: According to one embodiment, a display device, includes a display panel which includes divided display areas, signal line drivers, circuit boards which include a master board, power supply circuits, gradation voltage generation circuits, and at least one connection line, all the gradation voltage generation circuits generating the gradation voltages corresponding to a reference voltage supplied from the power supply circuit provided on the master board.
    Type: Application
    Filed: June 17, 2016
    Publication date: January 12, 2017
    Applicant: Japan Display Inc.
    Inventor: Yasuhiko YAMAGISHI
  • Patent number: 9111508
    Abstract: Each of a plurality of timing controllers has a synchronization reference signal output terminal from which a synchronization reference signal is output and a synchronization reference signal input terminal to which the synchronization reference signal is input. A master timing controller outputs a predetermined signal of display signals which are input from an external device, from the synchronization reference signal output terminal of the master timing controller as the synchronization reference signal, and the synchronization reference signal is input to the synchronization reference signal input terminals of the master timing controller and a slave timing controller. Accordingly, a luminance difference can be prevented from occurring between divided regions of a display panel due to asynchronization between display signals input to respective timing controllers in a display device in which a plurality of timing controllers are used and the display panel is divided into a plurality of regions.
    Type: Grant
    Filed: February 4, 2013
    Date of Patent: August 18, 2015
    Assignee: JAPAN DISPLAY INC.
    Inventors: Tomohide Oohira, Masahiro Tokita, Yasuhiko Yamagishi
  • Patent number: 9070337
    Abstract: Provided is a display device including a driver circuit for controlling supply of charges to an array of cells capable of storing the charges. In the driver circuit, a preceding electrically connecting part (SW221) controlled by a clock signal (CLK1) electrically connects an output signal line of a first circuit (211) having a positive polarity which is a potential higher than a reference potential and an output signal line of a second circuit (212) having a negative polarity which is a potential lower than the reference potential. After a predetermined time period has elapsed, a subsequent electrically connecting part (SW222) controlled by a clock signal (CLK2) electrically connects an output signal line of a third circuit (213) having the positive polarity and an output signal line of a fourth circuit (214) having the negative polarity.
    Type: Grant
    Filed: July 7, 2011
    Date of Patent: June 30, 2015
    Assignees: JAPAN DISPLAY INC., PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD
    Inventors: Toshiki Misonou, Yasuhiko Yamagishi
  • Publication number: 20150015564
    Abstract: A display device includes a pixel array, a source driver, a gate driver, and a display control circuit. The pixel array has a plurality of pixels arranged in matrix. The source driver supplies the pixels with a gradation voltage in accordance with display data. The gate driver supplies the pixels with a gate signal for selecting the pixels to be supplied with the gradation voltage in the unit of rows. The display control circuit controls the source driver and the gate driver. The gate driver outputs gate selection pulses for precharging the pixels on the first line, in an effective display scanning period.
    Type: Application
    Filed: July 8, 2014
    Publication date: January 15, 2015
    Inventor: Yasuhiko YAMAGISHI
  • Patent number: 8896588
    Abstract: The liquid crystal display device according to the present invention cancels the fluctuation in the potential of the common voltage so that the image quality of the screen displayed on the liquid crystal display panel can be prevented from deteriorating, and thus, a high quality image can be provided, and adopts a common symmetric method, such as a dot inverting method, as the method for driving the liquid crystal display device.
    Type: Grant
    Filed: October 10, 2012
    Date of Patent: November 25, 2014
    Assignee: Japan Display Inc.
    Inventor: Yasuhiko Yamagishi
  • Patent number: 8605024
    Abstract: To keep down deterioration in picture quality caused by an AC driving method to enable image display with high quality to be achieved.
    Type: Grant
    Filed: January 3, 2007
    Date of Patent: December 10, 2013
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Yasuhiko Yamagishi
  • Publication number: 20130187842
    Abstract: A display device having a display element is configured such that the extending directions of electrodes are made different from each other among upper, lower, left and right pixels.
    Type: Application
    Filed: March 12, 2013
    Publication date: July 25, 2013
    Applicants: Panasonic Liquid Crystal Display Co., Ltd., Hitachi Displays, Ltd.
    Inventors: Ryutaro Oke, Kazunori Ojima, Masaki Tsubokura, Masashi Baba, Yasuhiko Yamagishi, Masahiro Tanaka, Yuuichi Takenaka, Shinji Yasukawa, Kikuo Ono
  • Patent number: 8384647
    Abstract: In a driver circuit which controls the supply of charge to cells each of which can store a charge, the EMI (Electro Magnetic Interference) which occurs at the time of performing the charge sharing driving can be reduced. A preceding conduction means (SW13) which is controlled in response to a clock signal (CLK1) makes an output signal line corresponding to a first circuit which has positive polarity of a potential higher than a reference potential and an output signal line corresponding to a second circuit which has negative polarity of a potential lower than the reference potential electrically conductive with each other. After a lapse of a predetermined time, a succeeding conduction means (SW23) which is controlled in response to a clock signal (CLK2) makes an output signal line corresponding to a third circuit which has the positive polarity and an output signal line corresponding to a fourth circuit which has the negative polarity electrically conductive with each other.
    Type: Grant
    Filed: January 7, 2010
    Date of Patent: February 26, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yasuhiko Yamagishi, Toshiki Misonou
  • Publication number: 20120262886
    Abstract: A wiring area on a substrate is expanded and the width of the substrate is reduced to achieve a smaller display device at lower cost. The display device includes a display panel, a circuit board, and a flexible printed circuit board connecting the display panel and the circuit board, and the circuit board and the flexible printed circuit board are electrically connected to each other via an anisotropic conductive film. Crimp contacts 15 in the mounting area of the flexible printed circuit board 11 and crimp dummy terminals 16 outside the mounting area are provided on the circuit board, and some of the crimp dummy terminals act as test terminals 18 for crimp resistance measurement, and the crimp contacts 15 and the test terminals 18 are electrically connected to each other on the circuit board.
    Type: Application
    Filed: April 9, 2012
    Publication date: October 18, 2012
    Inventor: Yasuhiko YAMAGISHI
  • Publication number: 20120113072
    Abstract: A display device having a display element is configured such that the extending directions of electrodes are made different from each other among upper, lower, left and right pixels.
    Type: Application
    Filed: January 19, 2012
    Publication date: May 10, 2012
    Applicants: Panasonic Liquid Crystal Display Co., Ltd., Hitachi Displays, Ltd.
    Inventors: Ryutaro Oke, Kazunori Ojima, Masaki Tsubokura, Masashi Baba, Yasuhiko Yamagishi, Masahiro Tanaka, Yuuichi Takenaka, Shinji Yasukawa, Kikuo Ono