Patents by Inventor Yoshihiro Imajo

Yoshihiro Imajo 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: 10885865
    Abstract: A drive circuit includes an output circuit provided in a display panel to output a gate-on voltage and a gate-off voltage to a plurality of gate lines. The plurality of gate lines include first to sixth gate lines sequentially disposed in a scanning direction. A first transistor is put into an on state to electrically connect the first gate line and the third gate line, a second transistor is put into the on state to electrically connect the second gate line and the fourth gate line, the third transistor is put into the on state to electrically connect the third gate line and the fifth gate line, and the fourth transistor is put into the on state to electrically connect the fourth gate line and the sixth gate line, after the output circuit outputs the gate-on voltage to the first to fourth gate line.
    Type: Grant
    Filed: February 6, 2020
    Date of Patent: January 5, 2021
    Assignee: Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yoshihiro Imajo, Kazunori Inoue, Kenta Endo
  • Patent number: 10692457
    Abstract: A driving circuit including an output circuit that outputs a signal to a lead line electrically connected to a signal line provided in a display panel; and an output transistor that is provided in the output circuit and connected to an output terminal of the output circuit. An on-resistance value of the output transistor is set according to a resistance value of the lead line electrically connected to the output transistor.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: June 23, 2020
    Assignee: Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yoshihiro Imajo, Masahiro Ishii, Kenta Endo, Tetsuo Fukami
  • Publication number: 20200175937
    Abstract: A drive circuit includes an output circuit provided in a display panel to output a gate-on voltage and a gate-off voltage to a plurality of gate lines. The plurality of gate lines include first to sixth gate lines sequentially disposed in a scanning direction. A first transistor is put into an on state to electrically connect the first gate line and the third gate line, a second transistor is put into the on state to electrically connect the second gate line and the fourth gate line, the third transistor is put into the on state to electrically connect the third gate line and the fifth gate line, and the fourth transistor is put into the on state to electrically connect the fourth gate line and the sixth gate line, after the output circuit outputs the gate-on voltage to the first to fourth gate line.
    Type: Application
    Filed: February 6, 2020
    Publication date: June 4, 2020
    Inventors: Yoshihiro IMAJO, Kazunori INOUE, Kenta ENDO
  • Patent number: 10593281
    Abstract: A drive circuit includes an output circuit provided in a display panel to output a gate-on voltage and a gate-off voltage to a plurality of gate lines. The plurality of gate lines include first to sixth gate lines sequentially disposed in a scanning direction. A first transistor is put into an on state to electrically connect the first gate line and the third gate line, a second transistor is put into the on state to electrically connect the second gate line and the fourth gate line, the third transistor is put into the on state to electrically connect the third gate line and the fifth gate line, and the fourth transistor is put into the on state to electrically connect the fourth gate line and the sixth gate line, after the output circuit outputs the gate-on voltage to the first to fourth gate line.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: March 17, 2020
    Assignee: Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yoshihiro Imajo, Kazunori Inoue, Kenta Endo
  • Publication number: 20190392762
    Abstract: A display device comprising: a first substrate; and a first TFT array and a second TFT array that are formed on the first substrate, wherein the first TFT array includes: a plurality of first gate lines extending in a first direction; and a plurality of first source lines extending in a second direction intersecting the first direction, the second TFT array includes: a plurality of second gate lines extending in one of the first direction and the second direction; and a plurality of second source lines extending in the other of the first direction and the second direction, and the first TFT array and the second TFT array are electrically isolated from each other, and disposed adjacent to each other in the first direction.
    Type: Application
    Filed: June 17, 2019
    Publication date: December 26, 2019
    Inventors: Tetsuya KAWAMURA, Yoshihiro IMAJO
  • Publication number: 20180182341
    Abstract: A drive circuit includes an output circuit provided in a display panel to output a gate-on voltage and a gate-off voltage to a plurality of gate lines. The plurality of gate lines include first to sixth gate lines sequentially disposed in a scanning direction. A first transistor is put into an on state to electrically connect the first gate line and the third gate line, a second transistor is put into the on state to electrically connect the second gate line and the fourth gate line, the third transistor is put into the on state to electrically connect the third gate line and the fifth gate line, and the fourth transistor is put into the on state to electrically connect the fourth gate line and the sixth gate line, after the output circuit outputs the gate-on voltage to the first to fourth gate line.
    Type: Application
    Filed: February 21, 2018
    Publication date: June 28, 2018
    Inventors: Yoshihiro IMAJO, Kazunori INOUE, Kenta ENDO
  • Publication number: 20180130438
    Abstract: A driving circuit including an output circuit that outputs a signal to a lead line electrically connected to a signal line provided in a display panel; and an output transistor that is provided in the output circuit and connected to an output terminal of the output circuit. An on-resistance value of the output transistor is set according to a resistance value of the lead line electrically connected to the output transistor.
    Type: Application
    Filed: January 8, 2018
    Publication date: May 10, 2018
    Inventors: Yoshihiro IMAJO, Masahiro ISHII, Kenta ENDO, Tetsuo FUKAMI
  • Patent number: 8547318
    Abstract: A liquid crystal display includes pixels each having an switching element, drain drivers and gate drivers for operating the switching elements and the pixels, and drain lines and gate lines supplying signals from the drain drivers and the gate drivers to the switching elements being formed on one of a pair of substrates sandwiching a liquid crystal layer. Wiring lines are formed on the one of a pair of substrates for transferring display data signals and a clock signal to the gate drivers.
    Type: Grant
    Filed: January 8, 2013
    Date of Patent: October 1, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yoshihiro Imajo, Tetsuro Izawa, Kimitoshi Ohgiichi, Hiroshi Okawara, Shiro Ueda, Nobuyuki Ishige, Tetsuya Kawamura, Hisashi Ishino, Fumiaki Komori
  • Publication number: 20130201418
    Abstract: A liquid crystal display includes pixels each having an switching element, drain drivers and gate drivers for operating the switching elements and the pixels, and drain lines and gate lines supplying signals from the drain drivers and the gate drivers to the switching elements being formed on one of a pair of substrates sandwiching a liquid crystal layer. Wiring lines are formed on the one of a pair of substrates for transferring display data signals and a clock signal to the gate drivers.
    Type: Application
    Filed: January 8, 2013
    Publication date: August 8, 2013
    Applicants: Panasonic Liquid Crystal Display Co., Ltd., Hitachi Displays, Ltd.
    Inventors: Yoshihiro IMAJO, Tetsuro Izawa, Kimitoshi Ohgiichi, Hiroshi Okawara, Shido Ueda, Nobuyuki Ishige, Tetsuya Kawamura, Hisashi Ishino, Fumiaki Komori
  • Patent number: 8378950
    Abstract: The present invention provides a display device which displays a black image by periodically inserting the black image, wherein after the display of the black image, a first period in which a video signal different from a video signal for the black image is outputted to video signal lines is made different from a succeeding period in length.
    Type: Grant
    Filed: December 10, 2008
    Date of Patent: February 19, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Kenta Endo, Yoshihiro Imajo, Yoshihisa Ooishi, Ikuko Mori, Shisei Katou
  • Patent number: 8373636
    Abstract: A liquid crystal display includes pixels each having an switching element, drain drivers and gate drivers for operating the switching elements and the pixels, and drain lines and gate lines supplying signals from the drain drivers and the gate drivers to the switching elements being formed on one of a pair of substrates sandwiching a liquid crystal layer. Wiring lines are formed on the one of a pair of substrates for transferring display data signals and a clock signal to the gate drivers.
    Type: Grant
    Filed: August 28, 2012
    Date of Patent: February 12, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yoshihiro Imajo, Tetsuro Izawa, Kimitoshi Ohgiichi, Hiroshi Okawara, Shiro Ueda, Nobuyuki Ishige, Tetsuya Kawamura, Hisashi Ishino, Fumiaki Komori
  • Publication number: 20130002734
    Abstract: A liquid crystal display includes pixels each having an switching element, drain drivers and gate drivers for operating the switching elements and the pixels, and drain lines and gate lines supplying signals from the drain drivers and the gate drivers to the switching elements being formed on one of a pair of substrates sandwiching a liquid crystal layer. Wiring lines are formed on the one of a pair of substrates for transferring display data signals and a clock signal to the gate drivers.
    Type: Application
    Filed: August 28, 2012
    Publication date: January 3, 2013
    Applicants: Panasonic Liquid Crystal Display Co., Ltd., Hitachi Displays, Ltd.
    Inventors: Yoshihiro Imajo, Tetsuro Izawa, Kimitoshi Ohgiichi, Hiroshi Okawara, Shiro Ueda, Nobuyuki Ishige, Tetsuya Kawamura, Hisashi Ishino, Fumiaki Komori
  • Patent number: 8279154
    Abstract: A liquid crystal display includes pixels each having an switching element, drain drivers and gate drivers for operating the switching elements and the pixels, and drain lines and gate lines supplying signals from the drain drivers and the gate drivers to the switching elements being formed on one of a pair of substrates sandwiching a liquid crystal layer. Wiring lines are formed on the one of a pair of substrates for transferring display data signals and a clock signal to the gate drivers.
    Type: Grant
    Filed: April 11, 2012
    Date of Patent: October 2, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yoshihiro Imajo, Tetsuro Izawa, Kimitoshi Ohgiichi, Hiroshi Okawara, Shiro Ueda, Nobuyuki Ishige, Tetsuya Kawamura, Hisashi Ishino, Fumiaki Komori
  • Patent number: 8279390
    Abstract: In a display device forming a board for mounting a connector which allows inputting of video data thereon and a board for mounting a display control circuit to be connected to the connector thereon on a surface of a display module opposite to an observation side, the board for mounting the connector thereon and the board for mounting the display control circuit thereon are physically separated from each other and, further, an area of the board for mounting the display control circuit thereon is set smaller than an area of the board for mounting the connector thereon.
    Type: Grant
    Filed: June 9, 2009
    Date of Patent: October 2, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yoshihiro Imajo, Kazuhiko Yanagawa
  • Publication number: 20120194577
    Abstract: A liquid crystal display includes pixels each having an switching element, drain drivers and gate drivers for operating the switching elements and the pixels, and drain lines and gate lines supplying signals from the drain drivers and the gate drivers to the switching elements being formed on one of a pair of substrates sandwiching a liquid crystal layer. Wiring lines are formed on the one of a pair of substrates for transferring display data signals and a clock signal to the gate drivers.
    Type: Application
    Filed: April 11, 2012
    Publication date: August 2, 2012
    Applicants: Panasonic Liquid Crystal Display Co., Ltd., Hitachi Displays, Ltd.
    Inventors: Yoshihiro Imajo, Tetsuro Izawa, Kimitoshi Ohgiichi, Hiroshi Okawara, Shiro Ueda, Nobuyuki Ishige, Tetsuya Kawamura, Hisashi Ishino, Fumiaki Komori
  • Patent number: 8194203
    Abstract: A liquid crystal display device is provided with a backlight where there is little inconsistency in the temperature in the fluorescent lamps and which can illuminate the liquid crystal panel well even when the structure is thin.
    Type: Grant
    Filed: February 19, 2009
    Date of Patent: June 5, 2012
    Assignees: Panasonic Liquid Crystal Display Co., Ltd., Hitachi Displays, Ltd.
    Inventors: Yoshifumi Sekiguchi, Naoki Iwasaki, Yoshihiro Imajo
  • Patent number: 8179353
    Abstract: A liquid crystal display includes pixels each having an switching element, drain drivers and gate drivers for operating the switching elements and the pixels, and drain lines and gate lines supplying signals from the drain drivers and the gate drivers to the switching elements being formed on one of a pair of substrates sandwiching a liquid crystal layer. Wiring lines are formed on the one of a pair of substrates for transferring display data signals and a clock signal to the gate drivers.
    Type: Grant
    Filed: April 1, 2008
    Date of Patent: May 15, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yoshihiro Imajo, Tetsuro Izawa, Kimitoshi Ohgiichi, Hiroshi Okawara, Shiro Ueda, Nobuyuki Ishige, Tetsuya Kawamura, Hisashi Ishino, Fumiaki Komori
  • Publication number: 20110143582
    Abstract: In a display device forming a board for mounting a connector which allows inputting of video data thereon and a board for mounting a display control circuit to be connected to the connector thereon on a surface of a display module opposite to an observation side, the board for mounting the connector thereon and the board for mounting the display control circuit thereon are physically separated from each other and, further, an area of the board for mounting the display control circuit thereon is set smaller than an area of the board for mounting the connector thereon.
    Type: Application
    Filed: February 16, 2011
    Publication date: June 16, 2011
    Inventors: Yoshihiro Imajo, Kazuhiko Yanagawa
  • Patent number: 7944526
    Abstract: A liquid crystal display device having a direct backlight which uses a high-bright light source achieves both of a high efficiency and thin uniformity. In a liquid crystal display device which includes a liquid crystal panel, and a backlight unit which is arranged on a side of the liquid crystal panel opposite to a display screen of the liquid crystal panel, the backlight unit includes a housing, a plurality of light sources arranged in the inside of the housing, and a diffusion plate which is arranged between the plurality of light sources and the liquid crystal panel, the diffusion plate includes a plurality of light blocking regions at positions corresponding to the plurality of respective light sources, and the light blocking region at a center portion of the housing and the light blocking region at an edge portion of the housing exhibits transmissivities different from each other.
    Type: Grant
    Filed: March 9, 2010
    Date of Patent: May 17, 2011
    Assignees: Hitachi Displays, Ltd., IPS Alpha Technology, Ltd.
    Inventors: Yoshihiro Imajo, Yoshifumi Sekiguchi, Hitoshi Taniguchi, Ikuo Hiyama
  • Patent number: 7911574
    Abstract: In a display device forming a board for mounting a connector which allows inputting of video data thereon and a board for mounting a display control circuit to be connected to the connector thereon on a surface of a display module opposite to an observation side, the board for mounting the connector thereon and the board for mounting the display control circuit thereon are physically separated from each other and, further, an area of the board for mounting the display control circuit thereon is set smaller than an area of the board for mounting the connector thereon.
    Type: Grant
    Filed: January 23, 2008
    Date of Patent: March 22, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Yoshihiro Imajo, Kazuhiko Yanagawa