Patents Assigned to Panasonic Liquid Crystal Display Co., Ltd.
  • Patent number: 10983631
    Abstract: A display device with a touch panel includes a display panel, and a touch panel formed above the display panel. The touch panel includes X electrodes which extend in a first direction, and Y electrodes which extend in a second direction different from the first direction. The X electrodes and the Y electrodes respectively include intersection portions each formed where the X electrodes and the Y electrodes overlap each other, and electrode portions each formed between the intersection portions, wherein the electrode portions of one of the X electrodes is smaller in area than the electrode portions of one of the Y electrodes, and wherein floating electrodes are formed close to the electrode portion of the one of the X electrodes or Y electrodes, and over a reduced portion of the X electrode.
    Type: Grant
    Filed: January 23, 2020
    Date of Patent: April 20, 2021
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Kouichi Anno
  • Patent number: 10976609
    Abstract: A lighting device includes: a light source including a light emitting element that emits light having an emission peak wavelength in a wavelength range of 500 nm or less; and first, second and third fluorescent substances on which light emitted from the light emitting element is incident, wherein the first fluorescent substance absorbs at least light emitted from the light emitting element to emit light having a emission peak wavelength in a wavelength range of 500 nm to 580 nm, the second fluorescent substance absorbs at least light emitted from the first fluorescent substance to emit light having a emission peak wavelength in a wavelength range of 580 nm to 750 nm, and the third fluorescent substance absorbs light having a wavelength range of 500 nm or less to emit light having a emission peak wavelength in a wavelength range of 600 nm to 750 nm.
    Type: Grant
    Filed: February 6, 2020
    Date of Patent: April 13, 2021
    Assignee: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
    Inventor: Naoki Sato
  • Patent number: 10971095
    Abstract: A liquid crystal display includes source lines and gate lines, pixel electrodes, switching elements, a source driver, a gate driver, and a failure inspection circuit. The source lines and the gate lines are disposed in a lattice form. The pixel electrode is disposed in a pixel region defined by the source line and the gate line. The switching element is disposed corresponding to the pixel electrode. The source driver drives the source lines. The gate driver drives the gate lines. The failure inspection circuit is connected to the source lines or the gate lines, and performs inspection of the source lines or the gate lines. The failure inspection circuit includes monitor input signal lines, monitor output signal lines, a determination circuit that detects voltage levels of output signals from the monitor output signal lines, and an expected value comparison circuit that compares outputs from the determination circuit with expected values.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: April 6, 2021
    Assignees: PANASONIC CORPORATION, PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PANASONIC SEMICONDUCTOR SOLUTIONS CO., LTD.
    Inventors: Jun Suzuki, Akihiro Yoshizawa, Hideki Nozaki, Satoshi Endou, Kenji Fukuta, Hiroaki Goto
  • Patent number: 10969919
    Abstract: An electrostatic capacitive coupling type touch panel including an input region having four sides, a peripheral region around the input region, terminals formed in the peripheral region along a first side of the input region, wirings formed in the peripheral region along second, third and fourth sides of the input region, and the input region having X and Y electrodes crossing. The wirings are connected between corresponding X or Y electrodes and wiring terminals plurality of terminals. A dummy wiring, which is not connected to any of the X electrodes or Y electrodes, is provided outside the wiring formed in a farthest position from the input region, and the dummy wiring extends through the peripheral region along the second, third and fourth sides of the input region, and electrically connects to at least one dummy wiring terminal.
    Type: Grant
    Filed: January 9, 2020
    Date of Patent: April 6, 2021
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Hiroshi Esaka, Shouji Ikeda, Kouichi Anno
  • Patent number: 10962849
    Abstract: A liquid crystal display device includes a plurality of display panels which are disposed so as to overlap each other, each of the display panels displaying an image. The liquid crystal display device includes a first substrate; a second substrate disposed opposite to the first substrate in a first direction; a first liquid crystal layer disposed between the first substrate and the second substrate; a third substrate disposed opposite to the first substrate in a second direction that is an opposite direction to the first direction; and a second liquid crystal layer disposed between the first substrate and the third substrate.
    Type: Grant
    Filed: January 29, 2018
    Date of Patent: March 30, 2021
    Assignees: Panasonic Liquid Crystal Display Co., Ltd., Pasona Knowledge Partner Inc.
    Inventors: Ikuko Mori, Tomohiro Murakoso, Kazuhiko Tsuda
  • Patent number: 10962841
    Abstract: A liquid crystal display device in which a plurality of display panels are disposed so as to overlap each other and which displays an image on each of the plurality of display panels. The liquid crystal display device includes a first display panel; and a second display panel disposed so as to overlap the first display panel. The second display panel includes a first substrate on which a source line, a gate line, a thin film transistor, and an organic insulator are formed, a second substrate disposed opposite to the first substrate, and a liquid crystal layer disposed between the first substrate and the second substrate, a first spacer is formed in the first substrate to hold a distance between the first substrate and the second substrate. The first spacer and the organic insulator are made of a positive photosensitive resin.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: March 30, 2021
    Assignees: Panasonic Liquid Crystal Display Co., Ltd., Pasona Knowledge Partner Inc.
    Inventors: Tomohiro Murakoso, Kazuhiko Tsuda, Ikuko Mori
  • Patent number: 10962815
    Abstract: A LCD device having a large pixel holding capacitance includes opposedly facing first and second substrates, and liquid crystal between them. The first substrate includes a video signal line, a pixel electrode, a thin film transistor having a first electrode connected to the video signal line and a second electrode connected to the pixel electrode, a first silicon nitride film formed above the second electrode, an organic insulation film above the first silicon nitride film, a capacitance electrode above the organic insulation film, and a second silicon nitride film above the capacitance electrode and below the pixel electrode. A contact hole etched in both the first and second silicon nitride films connects the second electrode and the pixel electrode to each other. A holding capacitance is formed by the pixel electrode, the second silicon nitride film and the capacitance electrode.
    Type: Grant
    Filed: January 6, 2020
    Date of Patent: March 30, 2021
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Hideo Tanabe, Masaru Takabatake, Toshiki Kaneko, Atsushi Hasegawa, Hiroko Sehata
  • Patent number: 10948763
    Abstract: An image quality improving member comprising: a uniaxial anisotropic optical lens having a refractive index distribution in a first direction orthogonal to an optical axis of incident light, the optical lens condensing light vibrating in the first direction in the incident light; a translucent first substrate in which a black matrix including a plurality of first openings transmitting light output from the optical lens is formed; and a first polarizing plate disposed on the first substrate, the first polarizing plate having an absorption axis in a second direction orthogonal to the first direction when viewed from a direction of the optical axis.
    Type: Grant
    Filed: February 5, 2020
    Date of Patent: March 16, 2021
    Assignee: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
    Inventor: Daisuke Kajita
  • Patent number: 10942399
    Abstract: A display device includes a display panel having a display region and a peripheral region, the display panel including a TFT substrate, a counter substrate fixed to the TFT substrate by seal material formed at the peripheral region, and liquid crystal interposed between the TFT substrate and the counter substrate. The TFT substrate includes an inorganic film and an organic film, with first column spacers being formed on the counter substrate. The organic film includes a first part which has an island-like shape formed at the peripheral region and a second part formed at the display region, and the seal material covers at least one of the first column spacers and the first part of the organic film, and is in contact with the inorganic film. The first part of the organic film is separated from the second part of the organic film of the organic film.
    Type: Grant
    Filed: April 1, 2020
    Date of Patent: March 9, 2021
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Takahiro Nagami
  • Patent number: 10942407
    Abstract: The present invention is intended to control the color temperature of white exhibited by a liquid crystal display device. White is produced when light waves emitted through pixels associated with three colors of red, green, and blue have maximum intensities. The amounts of light emitted through the respective pixels are controlled by differentiating the shapes of the pixel electrodes disposed at the respective pixels from one another. Thus, the color temperature of white is controlled. Otherwise, the shapes of interceptive films disposed at the respective pixels are differentiated from one another in order to control light waves emitted through the respective pixels. Thus, the color temperature of white is controlled. The interceptive film may be shaped like the pixel electrode. Otherwise, the interceptive film may be realized with an interceptive pattern other than that of the pixel electrode or one of openings bored in a black matrix.
    Type: Grant
    Filed: December 23, 2019
    Date of Patent: March 9, 2021
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Ikuko Mori, Munenori Motooka, Ryutaro Oke, Kazunori Ojima, Kikuo Ono
  • Patent number: 10942406
    Abstract: A thin film transistor substrate including a pixel region constructed with pixels, includes: gate signal lines provided in the pixel region and extending in a first direction; gate lead-out lines provided in the pixel region and extending in a second direction; a thin film transistor and a pixel electrode provided in each of the pixels; a common electrode provided across the pixels; and a common line electrically connected to the common electrode. The gate signal lines and the gate lead-out lines are connected to each other through a first contact hole at at least one of a plurality of intersections of the gate signal lines and the gate lead-out lines, and the common line covers the first contact hole in planar view of the thin film transistor substrate.
    Type: Grant
    Filed: November 5, 2019
    Date of Patent: March 9, 2021
    Assignee: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
    Inventors: Teruhisa Nakagawa, Tetsuya Kawamura
  • Patent number: 10935848
    Abstract: A liquid crystal display device according to a present disclosure comprises: a thin film transistor substrate including a thin film transistor array; a counter substrate opposed to the thin film transistor substrate; and a liquid crystal layer disposed between the thin film transistor substrate and the counter substrate, wherein the thin film transistor substrate includes: an overlapping part that overlaps with the counter substrate in planar view; and a non-overlapping part that includes a terminal portion and does not overlap with the counter substrate in planar view, and an outer shape of the non-overlapping part has a non-rectangular shape in planar view.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: March 2, 2021
    Assignee: Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Kazuhiko Tsuda
  • Patent number: 10935834
    Abstract: A color display device comprises an array of a plurality of sub-pixels including a red sub-pixel, a blue sub-pixel, a first green sub-pixel and a second green sub-pixel. The first green sub-pixel and the second green sub-pixel are smaller than that of the red sub-pixel or the blue sub-pixel. The two adjacent first green sub-pixels are arranged in a first direction, the two adjacent second green sub-pixels are arranged in the first direction. The blue sub-pixel is directly adjacent to the red sub-pixel in a second direction; the blue sub-pixel is directly adjacent to the two first green sub-pixels and the two second green sub-pixels.
    Type: Grant
    Filed: December 26, 2019
    Date of Patent: March 2, 2021
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Shoichi Hirota, Shinichi Komura, Yoshifumi Sekiguchi, Tsunenori Yamamoto, Masaya Adachi
  • Patent number: 10937376
    Abstract: A liquid crystal display device is disclosed utilizing two or more display panels stacked on top of each other. In a dual panel configuration, the first display panel may be comprised of color pixels and the second display panel may be comprised of contrast pixels. The color pixel in the first display panel has a corresponding contrast pixel in the second display panel wherein said contrast pixel is larger in terms of length and in size than the corresponding color pixel. The liquid crystal display device may also switch to a mode that uses an expansion method of contrast pixels to reduce image displacement. Further disclosed is a configuration where the relative position of the first display panel and the second display panel may be adjusted to align the corresponding color and contrast pixels when viewing the display in oblique angles.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: March 2, 2021
    Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PASONA KNOWLEDGE PARTNER INC.
    Inventors: Satoshi Hirotsune, Katsuji Tanaka
  • Patent number: 10930230
    Abstract: A display device includes a first display panel disposed closer to an observer and a second display panel disposed farther from the observer than the first display panel. An image display region of the second display panel is larger than an image display region of the first display panel.
    Type: Grant
    Filed: January 10, 2019
    Date of Patent: February 23, 2021
    Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PASONA KNOWLEDGE PARTNER INC.
    Inventors: Toshikazu Koudo, Tetsuo Fukami
  • Patent number: 10923014
    Abstract: A liquid crystal display device comprises: a first display panel displaying a color image; a second display panel displaying a monochrome image; and an image processor generating first image data corresponding to the color image and second image data corresponding to the monochrome image based on an input video signal. The image processor generates the first image data and the second image data such that a graph representing transmittance of the first display panel for input gradation corresponding to the input video signal and a graph representing transmittance of the second display panel for the input gradation corresponding to the input video signal intersect each other at predetermined input gradation.
    Type: Grant
    Filed: April 1, 2020
    Date of Patent: February 16, 2021
    Assignees: Panasonic Liquid Crystal Display Co., Ltd., Pasona Knowledge Partner Inc.
    Inventors: Toshikazu Koudo, Masahiro Ishii, Katsuhiro Kikuchi, Ikuko Mori
  • Patent number: 10914995
    Abstract: A liquid crystal display panel includes: thin film transistors provided in corresponding one of pixels and including a gate electrode, a source electrode, a drain electrode, and a semiconductor layer; a scanning line formed in a layer identical to that of the gate electrode and electrically connected to the gate electrode; and a first light shielding body formed in a layer identical to that of at least one of the source electrode and the drain electrode. The semiconductor layer is formed above the scanning line with an insulating layer interposed between the semiconductor layer and the scanning line, the first light shielding body is located above the scanning line and beside the semiconductor layer, and the first light shielding body and the scanning line are connected to each other through a contact hole made in the insulating layer.
    Type: Grant
    Filed: October 11, 2018
    Date of Patent: February 9, 2021
    Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PASONA KNOWLEDGE PARTNER INC.
    Inventor: Daisuke Kajita
  • Patent number: 10908730
    Abstract: A touch panel includes a plurality of first electrodes, a plurality of second electrodes, and a plurality of wirings. Each of the plurality of first electrodes has a first portion formed on a layer different from that on which the second electrodes are formed and intersecting the second electrodes, and a second portion formed on the same layer as that on which the second electrodes are formed, but separated from the second electrode. The second electrode and the second portion of the first electrode are formed on a layer different than the layer where the wiring is formed. The first portion of the first electrode is connected to the second portion through a contact portion formed in an insulating film made of a negative resist between the first portion and the second electrode.
    Type: Grant
    Filed: February 7, 2020
    Date of Patent: February 2, 2021
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Masahiro Teramoto
  • Patent number: 10908456
    Abstract: A backlight module for a liquid crystal display includes: LEDs; LED drivers; a controller that outputs data and the latch signal to the LED drivers; data lines for transmitting the data; and latch signal lines for transmitting the latch signal. The latch signal lines are wired according to each of a plurality of first groups obtained by dividing LED drivers. The data lines are wired according to each of a plurality of second groups, which are constructed with a collection of at least one LED driver selected from each of the plurality of first groups without duplication, and each data line is commonly connected to at least one LED belonging to the corresponding second group.
    Type: Grant
    Filed: October 29, 2019
    Date of Patent: February 2, 2021
    Assignee: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
    Inventors: Tomoharu Notoshi, Yasuyuki Doi
  • Patent number: 10908443
    Abstract: A display device includes: a first frame including a frame portion covering a peripheral portion of a display panel; a second frame including a panel support sandwiching the display panel with the frame portion; an optical sheet being opposite to the display panel in a first direction, an outer peripheral end of the optical sheet being opposite to the panel support; a transparent substrate on which the optical sheet is disposed; a third frame including a main body having an accommodation space accommodating light emitting elements, and a substrate support extending from the main body to support the transparent substrate; and spacer members disposed between the panel support and the substrate support. The optical sheet and the panel support are disposed with a space interposed therebetween in the first direction, and each spacer member includes a restriction unit restricting movement of the transparent substrate in the first direction.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: February 2, 2021
    Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PASONA KNOWLEDGE PARTNER INC.
    Inventor: Shuhei Yokota