Patents Assigned to Panasonic Liquid Crystal Display Co., Ltd.
  • Patent number: 11081071
    Abstract: A liquid crystal display device that displays an input video signal, the liquid crystal display device comprising: a first liquid crystal display panel and a second liquid crystal display panel disposed to be laminated; a gamma corrector that generates a corrected video signal by performing gamma correction decided depending on a first control signal input from an outside with respect to the video signal; a first video signal generator that generates a first video signal for the first liquid crystal display panel using the corrected video signal; and a second video signal generator that generates a second video signal for the second liquid crystal display panel using the first video signal.
    Type: Grant
    Filed: December 10, 2019
    Date of Patent: August 3, 2021
    Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PASONA KNOWLEDGE PARTNER INC.
    Inventor: Toshikazu Koudo
  • Patent number: 11074877
    Abstract: A liquid crystal (LC) display device includes a first display panel, a second display panel, and an image processor. The image processor generates first image data and second image data that correspond to a first image and a second image for display on the first display panel and the second display panel, respectively. The image processor includes a first image data decision unit that decides the first image data, a filter that decides a correction factor, and a second image data decision unit that decides the second image data based on smoothed image data and the correction factor. A method for displaying an image in a LC display device with a first display panel and a second display panel includes determining first image data based on smoothed input image data, and determining second image data based on the smoothed input image data and a correction factor.
    Type: Grant
    Filed: January 23, 2020
    Date of Patent: July 27, 2021
    Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PASONA KNOWLEDGE PARTNER INC.
    Inventors: Hideyuki Nakanishi, Katsuhiro Kikuchi, Takenobu Nishiguchi, Tatsuo Itoman
  • Publication number: 20210225317
    Abstract: A liquid crystal display panel, which includes: a plurality of pixels arranged in a row direction and a column direction, the pixel comprising a transistor; a plurality of data lines extending in the column direction, and including a first data line and a second data line; and a plurality of scan lines extending in the row direction, and crossing the plurality of data lines. The first data line and the second data line are disposed between two adjacent pixel columns, and partially overlap in a thickness direction of the liquid crystal display panel.
    Type: Application
    Filed: February 19, 2020
    Publication date: July 22, 2021
    Applicant: Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Teruhisa Nakagawa
  • Publication number: 20210223651
    Abstract: A display panel includes multiple pairs of scan lines extending in a first direction, multiple data lines extending in a second direction transverse to the first direction, and multiple connection lines extending in the second direction. For each pair of scan lines, the scan lines are provided with the same electrical signal. The data lines cooperate with the scan lines to define a plurality of pixel regions in such a way that two of the data lines are interposed between two of the pixel regions that are immediately adjacent to each other in the first direction in plan view. Each connection line is electrically connected to a corresponding pair of scan lines.
    Type: Application
    Filed: February 18, 2020
    Publication date: July 22, 2021
    Applicant: Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Teruhisa Nakagawa
  • Publication number: 20210223652
    Abstract: A liquid crystal display panel, comprising: a plurality of source lines extending in a first direction, and including a first source line and a second source line; a plurality of gate lines extending in a second direction different from the first direction, and crossing the plurality of source lines; and a plurality of pixel units defined by the plurality of source lines and the plurality of gate lines, in which a plurality of transistors and a plurality of pixel electrode are disposed, respectively; the first source line and the second source line are respectively connected to two adjacent rows of the pixel unit; wherein the first source line comprises a first line segment disposed on a first wiring layer; the second source line comprises a second line segment, and the second line segment is disposed on a second wiring layer different from the first wiring layer.
    Type: Application
    Filed: February 20, 2020
    Publication date: July 22, 2021
    Applicant: Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Teruhisa Nakagawa
  • Patent number: 11061288
    Abstract: A liquid crystal display device includes a TFT substrate having a display region where pixels each having a TFT and a pixel electrode are formed in a matrix, a counter substrate having a display region where color filters of three colors are formed in a matrix, the TFT substrate and the counter substrate being bonded together with a sealing material in a seal portion at a periphery, and liquid crystal sealed between the TFT substrate and the counter substrate by the seal material. In the display region, a first insulation film, a first alignment film, a first columnar spacer, an overcoat film, a first color filter among the color filters of three colors are stacked in this order between the TFT substrate and the counter substrate.
    Type: Grant
    Filed: December 26, 2019
    Date of Patent: July 13, 2021
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Takashi Yamamoto, Tomoya Sugano, Takamitsu Kamada
  • Patent number: 11054697
    Abstract: A liquid crystal display device includes: a first display panel including a first liquid crystal cell; and a second display panel including a second liquid crystal cell and is opposed to the first display panel. An irregularity structure having a predetermined external haze value is provided at an interface of an air layer existing between the first display panel and the second display panel.
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: July 6, 2021
    Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PASONA KNOWLEDGE PARTNER INC.
    Inventors: Yoichi Yasui, Katsuhiro Kikuchi
  • Patent number: 11054927
    Abstract: An in-cell touch panel includes: transistors and pixel electrodes respectively provided in pixels; common electrodes arranged in a first direction and a second direction, each facing one or more of the pixel electrodes and provided separately from each other; gate lines extending along the first direction; data lines extending along the second direction; dummy data lines extending along the second direction, provided in a same layer as the data lines; and touch lines extending along the second direction and connected to a corresponding one of common electrodes. The data lines and the dummy data lines are alternately provided for boundaries between two pixels adjacent in the first direction.
    Type: Grant
    Filed: January 24, 2020
    Date of Patent: July 6, 2021
    Assignee: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
    Inventor: Daisuke Kajita
  • Patent number: 11036107
    Abstract: A liquid crystal display device includes: transistors and pixel electrodes respectively provided in each pixels; common electrode facing the pixel electrodes; gate lines extending along the first direction and supplying gate signals to the transistors, respectively; gate lead lines extending in the second direction and each connected to a corresponding gate line at at least one of a plurality of intersections with the gate lines; data lines extending along the second direction and supplying data signals to the transistors respectively; and common lines extending along the second direction and connected to the common electrode. In a planar view, each of the common lines and each of the gate lead lines overlap partially.
    Type: Grant
    Filed: January 28, 2020
    Date of Patent: June 15, 2021
    Assignee: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
    Inventor: Daisuke Kajita
  • Patent number: 11036086
    Abstract: A display device includes: a display panel; a driver IC that outputs a driving signal to the display panel; a flexible substrate on which the driver IC is mounted; a first frame that supports the display panel from a side of a light source; and a second frame that supports the light source while being provided independently of the first frame. The first frame includes a metallic frame unit which is opposite to the driver IC from the side of the light source.
    Type: Grant
    Filed: August 28, 2019
    Date of Patent: June 15, 2021
    Assignees: Panasonic Liquid Crystal Display Co., Ltd., Pasona Knowledge Partner Inc.
    Inventors: Yusuke Katagiri, Masaki Tsubokura
  • Patent number: 11036323
    Abstract: A display device comprising: a plurality of source lines extending in a first direction; a plurality of gate lines extending in a second direction intersecting the first direction; a plurality of pixel electrodes arrayed in the first direction and the second direction; a plurality of common electrodes disposed corresponding to a plurality of touch regions arrayed in the first direction and the second direction, the plurality of common electrodes being disposed while opposed to the plurality of pixel electrodes; a plurality of sensor electrode lines electrically connected to the plurality of common electrodes; a plurality of inspection signal lines electrically connected to the plurality of common electrodes through a plurality of inspection thin film transistors; and an inspection gate line connected to a gate electrode of each of the plurality of inspection thin film transistors.
    Type: Grant
    Filed: January 21, 2020
    Date of Patent: June 15, 2021
    Assignee: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
    Inventors: Tetsuo Fukami, Masahiro Ishii
  • Patent number: 11036098
    Abstract: The present invention realizes a bright image display by enhancing a numerical aperture of pixels. At least a portion of a pixel electrode is overlapped to a thin film transistor by way of a first insulation film, the pixel electrode is connected to an output electrode of the thin film transistor via a contact hole which is formed in the first insulation film, the counter electrode is arranged above the pixel electrode by way of a second insulation film in a state that the counter electrode is overlapped to the pixel electrode, the counter electrode is formed at a position avoiding the contact hole formed in the first insulation film as viewed in a plan view, and at least a portion of the counter electrode is overlapped to the thin film transistor.
    Type: Grant
    Filed: July 6, 2020
    Date of Patent: June 15, 2021
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Takahiro Ochiai, Tohru Sasaki, Hirotaka Imayama, Masateru Morimoto
  • Patent number: 11022834
    Abstract: The present disclosure relates to a viewing angle control unit and a display unit including the same, in which the viewing angle control unit includes: a first substrate disposed on a side of the surface of the liquid crystal display unit; a second substrate which opposes the first substrate; a liquid crystal layer arranged between the first substrate and the second substrate; and a seal assembly which is disposed between the first substrate and the second substrate and surrounds the liquid crystal layer and seals and separates the liquid crystal layer from the outside. At least part of the seal assembly is constituted by a seal section and a shade section which are stacked in a direction substantially perpendicular to opposing surfaces of the first substrate and the second substrate.
    Type: Grant
    Filed: February 19, 2020
    Date of Patent: June 1, 2021
    Assignee: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
    Inventors: Masahiro Ishii, Tetsuo Fukami, Yukinori Kayama
  • Patent number: 11016338
    Abstract: A display device includes a liquid crystal display (LCD) panel, a rear frame, a light guide plate, and a light emitting diode (LED) substrate. The LED substrate includes a first substrate portion, a second substrate portion, a plurality of LEDs mounted to the first substrate portion, and a power connector mounted to the second substrate portion. The first substrate portion extends in a first direction along a first side of the light guide plate that faces the first sidewall of the rear frame. The second substrate portion extends in a second direction along a second side of the light guide plate that faces the second sidewall of the rear frame. A backlight unit for a display device includes a light guide plate and a LED substrate.
    Type: Grant
    Filed: November 26, 2019
    Date of Patent: May 25, 2021
    Assignee: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
    Inventors: Ryosuke Yabuki, Tomoharu Notoshi, Naoki Sato
  • Patent number: 10996531
    Abstract: A display device includes a display area, a source driver, a gate driver, a first substrate, a second substrate, and a liquid crystal layer. The liquid crystal layer is disposed between the first substrate and the second substrate. The second substrate includes source lines, gate lines, gate lead-out lines, and bridge lines. The source lines are electrically connected to the source driver. The gate lead-out lines electrically connect the gate driver to the gate lines. The bridge lines connect pairs of the gate lead-out lines that are adjacent in the second direction. At least one of the gate lines is electrically connected to the gate driver via at least two of the gate lead-out lines and one of the bridge lines.
    Type: Grant
    Filed: February 12, 2020
    Date of Patent: May 4, 2021
    Assignee: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
    Inventors: Asuka Higashi, Teruhisa Nakagawa
  • Patent number: 10996530
    Abstract: A liquid crystal display device includes: transistors and pixel electrodes respectively provided in pixels; a common electrode facing the pixel electrodes; gate lines extending along the first direction and supplying gate signals to the transistors respectively; gate lead lines extending along the second direction and respectively connected to the gate lines at at least one of a plurality of intersections between the gate lead lines and the gate lines; and data lines extending along the second direction and supplying data signals to the transistors respectively. The pixels are made up of a plurality of types of pixels arranged periodically and repeatedly along the first direction, the data lines and the gate lead lines are formed in a same layer, and either of the data lines and the gate lead lines are alternatively provided for boundaries between two pixels adjacent in the first direction.
    Type: Grant
    Filed: January 30, 2020
    Date of Patent: May 4, 2021
    Assignee: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
    Inventor: Daisuke Kajita
  • Patent number: 10989972
    Abstract: A liquid crystal display device includes: common electrodes that are opposed to pixel electrodes respectively; a detection circuit that detects a waveform of a common potential at the plurality of common electrodes; and a determination circuit that determines abnormality of the liquid crystal display device based on the waveform detected by the detection circuit. A plurality of pixels are divided into a plurality of segments, the common electrodes are provided corresponding to the plurality of segments, and the detection circuit detects the waveform of the common potential at each of the common electrodes when a predetermined data signal is input to at least one of data signal lines whiled a predetermined gate signal is input to at least one of gate signal lines.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: April 27, 2021
    Assignee: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
    Inventors: Masafumi Hirata, Masashi Kuno
  • Patent number: 10989955
    Abstract: A liquid crystal display device includes a first glass substrate, a second glass substrate, a first liquid crystal layer disposed between the first glass substrate and the second glass substrate, a third glass substrate, a fourth glass substrate, a second liquid crystal layer disposed between the third glass substrate and the fourth glass substrate, a first polarizing plate formed on the first glass substrate, a second polarizing plate formed on the third glass substrate, and a bonding layer disposed between the first glass substrate and the third glass substrate. In planar view, the bonding layer is disposed outside the first polarizing plate and the second polarizing plate, a surface on the bonding layer bonds to the first glass substrate, and a surface on the bonding layer bonds to the third glass substrate.
    Type: Grant
    Filed: April 27, 2020
    Date of Patent: April 27, 2021
    Assignees: Panasonic Liquid Crystal Display Co., Ltd., Pasona Knowledge Partner Inc.
    Inventors: Yoichi Yasui, Takenori Yaguchi, Takaaki Kitada, Kazuhiko Tsuda, Takashi Kato, Hidenori Kikuchi, Naoki Terasawa, Katsuji Tanaka
  • Patent number: 10989965
    Abstract: A liquid crystal display device includes a TFT substrate and a counter substrate and a liquid crystal layer sandwiched therebetween. A scanning line, a video signal line, a thin film transistor connected to the scanning line and the video signal line, a pixel electrode connected to the thin film transistor, and a counter electrode are formed on the TFT substrate, and a columnar spacer formed on the counter substrate. The pixel and counter electrodes are transparent, and the liquid crystal layer is controlled by an electric field generated between the pixel and counter electrodes. The counter electrode contacts with a metal line having a first part which is extended in parallel with the scanning line and a second part which is extended in parallel with the video signal line, a width of the first part of the metal line being narrower than a width of the scanning line.
    Type: Grant
    Filed: May 18, 2020
    Date of Patent: April 27, 2021
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Hidehiro Sonoda, Chikae Matsui, Noboru Kunimatsu
  • Patent number: 10983399
    Abstract: A method for manufacturing a liquid crystal display device including a display panel provided with a first substrate, a second substrate, and liquid crystal, the method comprises: a first irradiation step of irradiating first positions of a first glass plate and a second glass plate with a laser beam having first irradiation energy; a second irradiation step of irradiating second positions of the first glass plate and the second glass plate with the laser beam having second irradiation energy higher than the first irradiation energy; and an etching step of exposing the display panel to an etching solution after the first irradiation step and the second irradiation step, such that the first positions are not cleaved, the second positions are cleaved, and at least a part of an outer periphery of each of the first substrate and the second substrate is formed.
    Type: Grant
    Filed: September 10, 2019
    Date of Patent: April 20, 2021
    Assignee: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
    Inventors: Kazuhiko Tsuda, Yoshiki Watanabe, Norimichi Shirai