Patents Assigned to Panasonic Liquid Crystal Display Co., Ltd.
  • Patent number: 11211025
    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: Grant
    Filed: February 19, 2020
    Date of Patent: December 28, 2021
    Assignee: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
    Inventor: Teruhisa Nakagawa
  • Patent number: 11209684
    Abstract: A liquid crystal display device includes: first and second liquid crystal cells; first and second circuit boards connected to the first and second liquid crystal cells through first and second flexible wiring boards, respectively; a frame disposed on an opposite side to the first liquid crystal cell with respect to the second liquid crystal cell; and a holder that holds the first circuit board and the second circuit board. The first circuit board and the second circuit board are disposed on an opposite side to the second liquid crystal cell with respect to the frame. The second circuit board is located closer to the frame than the first circuit board, and the holder sandwiches the first circuit board, and stores the second circuit board between the frame and the holder.
    Type: Grant
    Filed: October 21, 2020
    Date of Patent: December 28, 2021
    Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PASONA KNOWLEDGE PARTNER INC.
    Inventor: Ryosuke Yabuki
  • Patent number: 11187951
    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: Grant
    Filed: February 18, 2020
    Date of Patent: November 30, 2021
    Assignee: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
    Inventor: Teruhisa Nakagawa
  • Patent number: 11187927
    Abstract: A display device according to a present disclosure comprises: a display region; a frame region disposed around the display region; a plurality of first wirings extending in a first direction in the display region; a first drive circuit electrically connected to one end of each of the plurality of first wirings; a first inspection wiring electrically connected to another end of each of the plurality of first wirings through each of a plurality of inspection thin film transistors; a second inspection wiring connected to a gate electrode of each of the plurality of inspection thin film transistors; an inspection drive circuit electrically connected to the second inspection wiring; and an inspection circuit electrically connected to the first inspection wiring, wherein at least a part of the second inspection wiring extends in the first direction in the display region.
    Type: Grant
    Filed: November 19, 2019
    Date of Patent: November 30, 2021
    Assignee: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
    Inventor: Hiroyuki Yabuki
  • Patent number: 11169416
    Abstract: A liquid crystal display device includes a first substrate, a first alignment film formed over the first substrate, a second substrate, a second alignment film formed over the second substrate, a liquid crystal layer sandwiched between the first alignment film and the second alignment film, and a projecting portion formed over the second substrate. The first film is a photo alignment film, and a thickness “d2” of the second alignment film over the projecting portion and a film thickness “d1” of a portion of the first alignment film facing the projecting portion satisfy formula (2), d2<d1??(2).
    Type: Grant
    Filed: April 22, 2020
    Date of Patent: November 9, 2021
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Hidehiro Sonoda, Chikae Matsui, Noboru Kunimatsu
  • Patent number: 11170738
    Abstract: A display device according to present disclosure comprising: a first display panel that displays a first image; a second display panel disposed on a back surface side of the first display panel to display a second image; and an image processor that acquires input image data and generates first image data corresponding to the first image and second image data corresponding to the second image based on the input image data, wherein the image processor includes a first filter circuit that performs first low-pass filter processing on the input image data, and the first filter circuit reduces a degree of the first low-pass filter processing when input gradation of the input image data is less than first gradation as compared with a case that the input gradation is greater than or equal to the first gradation.
    Type: Grant
    Filed: November 25, 2019
    Date of Patent: November 9, 2021
    Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PASONA KNOWLEDGE PARTNER INC.
    Inventors: Hideyuki Nakanishi, Toshikazu Koudo, Katsuhiro Kikuchi
  • Patent number: 11163189
    Abstract: A display device comprises: a thin film transistor substrate; a counter substrate disposed to be opposed to the thin film transistor substrate; and a plurality of spacers protruding from the counter substrate toward the thin film transistor substrate, wherein the counter substrate includes: a black matrix including a first opening and a second opening that are adjacent to each other in a first direction; a first color filter being disposed while overlapping with the first opening and the second opening in planar view; and a second color filter being disposed while overlapping with at least a part of a region between the first opening and the second opening in planar view, and a first spacer included in the plurality of spacers overlaps with the second color filter between the first opening and the second opening in planar view.
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: November 2, 2021
    Assignee: Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Takashi Mibu, Teruhisa Nakagawa
  • Patent number: 11163391
    Abstract: Provided is a display panel including: a plurality of pixel electrodes divided into a plurality of groups; and a plurality of common electrodes arranged at a ratio of one to a plurality of pixel electrodes included in one of the plurality of groups. Each of a plurality of sensor electrode lines overlaps with corresponding one of a plurality of data signal lines in plan view. The plurality of sensor electrode lines and each of the plurality of common electrodes overlap each other in plan view. The each of the plurality of common electrodes is electrically connected to the plurality of sensor electrode lines. At least one insulating film is formed between each of a region between the data signal lines and the sensor electrode lines, a region between the sensor electrode lines and the common electrodes, and a region between the common electrodes and the pixel electrodes.
    Type: Grant
    Filed: March 23, 2020
    Date of Patent: November 2, 2021
    Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PANASONIC CORPORATION
    Inventors: Toshiyuki Aoyama, Tetsuo Fukami, Daisuke Kajita, Kazushige Takagi
  • Patent number: 11156875
    Abstract: A liquid crystal display device includes a TFT substrate having a first alignment film and an opposing substrate having a second alignment film with liquid crystals sandwiched therebetween. One of the first and second alignment films, comprises a first polyimide produced via polyamide acid ester containing cyclobutane as a precursor and a second polyimide produced via polyamide acid as a precursor. The polyamide acid has a higher polarity than that of the polyamide acid ester. The one of the first and second alignment films is responsive to photo-alignment. A first side of the one of the first and second alignment films is adjacent to the liquid crystals, and a second side thereof is closer to one of the TFT substrate and the counter substrate than the first side. The first side contains more of the first polyimide and less of the second polyimide than the second side.
    Type: Grant
    Filed: December 5, 2019
    Date of Patent: October 26, 2021
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Noboru Kunimatsu, Chikae Matsui, Hidehiro Sonoda, Yuko Matsumoto, Shoichi Uchino, Masaki Matsumori, Yasushi Tomioka
  • Patent number: 11150526
    Abstract: A display device includes a first substrate formed with a first gate line, a first source line, a first thin film transistor, and a first light shielding unit; a second substrate disposed opposite to the first substrate; and a first liquid crystal layer disposed between the first substrate and the second substrate. The first light shielding unit is disposed between the first thin film transistor and the first liquid crystal layer, and overlaps at least a part of a first channel region of the first thin film transistor in planar view.
    Type: Grant
    Filed: January 13, 2020
    Date of Patent: October 19, 2021
    Assignees: Panasonic Liquid Crystal Display Co., Ltd., Pasona Knowledge Partner Inc.
    Inventors: Teruhisa Nakagawa, Daisuke Kajita
  • Patent number: 11150756
    Abstract: A mobile phone is provided which includes a liquid crystal display device in which a front window and a touch panel are bonded together with an adhesive sheet, wherein a logo having plural layers is formed on a back side of the front window. A touch-panel flexible wiring substrate is mounted to the touch panel, A plane distance between an end portion of the plural layers of the logo and an end portion of the touch panel is set to greater than zero. With this configuration, it is possible to prevent a peeling stress on the adhesive sheet, even if a thickness of the adhesive sheet is smaller than the sum of a thickness of the touch-panel flexible wiring substrate and a thickness of the logo.
    Type: Grant
    Filed: May 1, 2020
    Date of Patent: October 19, 2021
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Eiji Oohira
  • Patent number: 11143899
    Abstract: A portable device and method of manufacturing a display device includes a display panel having a glass substrate and a polarizer adhered to the glass substrate, a touch panel which is made of resin material and adhered to the polarizer of the display panel by a first adhesive material, and a front window which is made of glass and adhered to the touch panel by a second adhesive material. One of the first adhesive material and the second adhesive material is an adhesive sheet, and an other of the first adhesive material and the second adhesive material is an ultraviolet-curing adhesive material.
    Type: Grant
    Filed: August 25, 2020
    Date of Patent: October 12, 2021
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Eiji Oohira
  • Patent number: 11132967
    Abstract: A liquid crystal display device having a plurality of display panels disposed in a superposed manner, comprising: a first display panel that displays a first image; a second display panel disposed on a back surface side of the first display panel to display a second image; and an image processor that generates first image data for the first image and second image data for the second image based on the input image data, wherein the image processor includes: a differential filter that performs differential filter processing on a luminance signal calculated from the input image data and outputs a differential detection value; a background level detection circuit that detects a background level using the luminance signal; a gain determination circuit that determines a filter gain using the differential detection value and the background level; and a low-pass filter that performs low-pass filter processing using the filter gain.
    Type: Grant
    Filed: February 13, 2020
    Date of Patent: September 28, 2021
    Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PASONA KNOWLEDGE PARTNER INC.
    Inventors: Hideyuki Nakanishi, Toshikazu Koudo, Katsuhiro Kikuchi
  • Patent number: 11126025
    Abstract: An in-cell touch panel includes: common electrodes arranged in a first direction and a second direction, respectively facing one or more of pixel electrodes and provided separately from each other; and touch lines that extend along the second direction and are each connected to a corresponding one of the common electrodes. Each common electrode has segment electrodes divided with an area on the gate line as a division area, and each segment electrode included in one of the common electrodes is connected by at least one of the touch lines.
    Type: Grant
    Filed: February 7, 2020
    Date of Patent: September 21, 2021
    Assignee: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
    Inventor: Daisuke Kajita
  • Patent number: 11120760
    Abstract: A liquid crystal display device includes: first and second liquid crystal panels disposed to be overlapped with each other; a parallax reduction unit that generates the second output image signal by performing smoothing processing on a first signal based on the input image signal; a first temporal filter that generates a first response correction signal determining the first output image signal based on the second output image signal; and a corrector that generates the first output image signal based on at least the first response correction signal and a second signal based on the input image signal. The first temporal filter generates the first response correction signal of a current frame based on the second output image signal of the current frame and the first response correction signal of a previous frame.
    Type: Grant
    Filed: November 23, 2020
    Date of Patent: September 14, 2021
    Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PASONA KNOWLEDGE PARTNER INC.
    Inventors: Hideyuki Nakanishi, Katsuhiro Kikuchi, Takenobu Nishiguchi, Tatsuo Itoman
  • Patent number: 11119368
    Abstract: A liquid crystal display panel having a plurality of pixels arrayed in a matrix, the liquid crystal display panel comprising: a plurality of first signal lines; a transistor provided in each of the plurality of pixels; and a pixel electrode provided in each of the plurality of pixels, wherein, in each of the plurality of pixels, the pixel electrode includes a first pixel electrode and a second pixel electrode that are separated across the first signal line corresponding to the pixel and a bridge electrode that extends over the first signal line and connects the first pixel electrode and the second pixel electrode, the first pixel electrode has a plurality of first line electrodes extending in a first direction, and the second pixel electrode has a plurality of second line electrodes extending in a second direction different from the first direction.
    Type: Grant
    Filed: February 4, 2020
    Date of Patent: September 14, 2021
    Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PASONA KNOWLEDGE PARTNER INC.
    Inventor: Teruhisa Nakagawa
  • Patent number: 11114049
    Abstract: A liquid crystal display device includes: a display unit including a first liquid crystal panel and a second liquid crystal panel disposed on a rear surface side of the first liquid crystal panel; and an image processor that generates first and second output image signals respectively output to the first and second liquid crystal panels based on an input image signal. The image processor includes; a distributor that distributes the input image signal into first and second distribution image signals used to generate the first and second output image signals, respectively; and a first unevenness corrector that generates the first output image signal by performing first unevenness correction to prevent display unevenness of the display unit on the first distribution image signal output from the distributor, and outputs the generated first output image signal to the first liquid crystal panel.
    Type: Grant
    Filed: November 21, 2019
    Date of Patent: September 7, 2021
    Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PASONA KNOWLEDGE PARTNER INC.
    Inventors: Satoshi Hirotsune, Yasuyuki Suga, Tatsuo Itoman
  • Patent number: 11114177
    Abstract: A display device including a bidirectional shift register circuit, including: a plurality of cascade-connected register circuits; various circuits for setting various nodes to various voltage levels responsive to various signals input to various terminals; and an output circuit which outputs the clock pulse as an output pulse when the voltage of the first node is high level, wherein, at the forward shift operation, the bottom dummy register circuit is not input the reset signal and the first node of the bottom dummy register circuit is reset if the initial reset circuit of the bottom dummy register circuit receives the backward trigger signal, and wherein, at the backward shift operation, the top dummy register circuit is not input the reset signal and the first node of the top dummy register circuit is reset if the initial reset circuit of the top dummy register circuit receives the forward trigger signal.
    Type: Grant
    Filed: June 19, 2020
    Date of Patent: September 7, 2021
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Takahiro Ochiai, Mitsuru Goto, Hiroko Sehata, Hiroyuki Higashijima
  • Patent number: 11112627
    Abstract: Disclosed herein are a viewing angle control unit, a substrate assembly of the viewing angle control unit, and a display assembly. The viewing angle control unit includes two substrate assemblies, a liquid crystal (LC) component disposed between the substrate assemblies, and a seal component interconnecting the substrate assemblies and surrounding the LC component. At least one of the substrate assemblies includes a transparent base substrate, a transparent electrode layer disposed on the transparent base substrate, and an alignment film disposed on the transparent electrode layer. The transparent electrode layer has a groove extending along at least part of the seal component, so as to mitigate excessive spreading of a material of the alignment film during manufacturing of the viewing angle control unit. The display assembly includes the viewing angle control unit.
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: September 7, 2021
    Assignee: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
    Inventors: Masahiro Ishii, Tetsuo Fukami, Yukinori Kayama
  • Patent number: 11086151
    Abstract: Provide are a viewing angle control device, a method of manufacturing the same, and a display panel. The viewing angle control device includes a first substrate and a second substrate disposed opposite each other; a first electrode and a second electrode disposed respectively on inner surfaces of the first substrate and the second substrate opposite each other; a first alignment film disposed on an inner surface of the first electrode opposite the second electrode; and a liquid crystal layer disposed between the first substrate and the second substrate. A groove is provided in a region of the inner surface of the first electrode, and a conductor that is electrically connected to the first electrode and has lower resistivity than the first electrode is provided at the groove or at a periphery of the groove.
    Type: Grant
    Filed: February 20, 2020
    Date of Patent: August 10, 2021
    Assignee: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
    Inventors: Masahiro Ishii, Tetsuo Fukami, Yukinori Kayama