Patents Assigned to PASONA KNOWLEDGE PARTNER INC.
  • Patent number: 11448911
    Abstract: A method of setting a common electrode voltage of a liquid crystal display panel in a liquid crystal module is provided. The liquid crystal module includes the liquid crystal display panel including an alignment film, and a backlight disposed behind the liquid crystal display panel. The method of setting a common electrode voltage of a liquid crystal display panel includes: eliminating an electric charge of the alignment film by turning on the backlight without driving the liquid crystal display panel to emit light of the backlight onto the liquid crystal display panel; and setting the common electrode voltage of the liquid crystal display panel by adjusting the common electrode voltage, after the eliminating of the electric charge.
    Type: Grant
    Filed: July 13, 2021
    Date of Patent: September 20, 2022
    Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PASONA KNOWLEDGE PARTNER INC.
    Inventors: Keisuke Izawa, Makoto Arita, Toshitaka Uchikoba
  • Patent number: 11448923
    Abstract: A liquid crystal display panel to be used in a vertical orientation includes: a first substrate; a second substrate located opposite to the first substrate; and a liquid crystal layer disposed between the first substrate and the second substrate. When a position of a top end of the liquid crystal layer is defined as a first position and a position of a bottom end of the liquid crystal layer is defined as a second position when the liquid crystal display panel is placed in the vertical orientation, a distance between the first substrate and the second substrate when the liquid crystal panel is in a horizontal orientation gradually decreases from the first position to the second position.
    Type: Grant
    Filed: July 13, 2021
    Date of Patent: September 20, 2022
    Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PASONA KNOWLEDGE PARTNER INC.
    Inventors: Keisuke Izawa, Makoto Arita, Toshitaka Uchikoba
  • Patent number: 11402707
    Abstract: A liquid crystal display device includes: a first liquid crystal cell; a second liquid crystal cell disposed in a backlight side; and a first optical sheet and a second optical sheet both having an identical layer structure. The first optical sheet is disposed on a front surface side of the first liquid crystal cell and the second optical sheet is disposed on a back surface side of the second liquid crystal cell, or vice versa.
    Type: Grant
    Filed: May 2, 2019
    Date of Patent: August 2, 2022
    Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PASONA KNOWLEDGE PARTNER INC.
    Inventors: Yoichi Yasui, Takao Imaoku, Katsuhiro Kikuchi, Kazuhiko Tsuda
  • Patent number: 11398198
    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: February 8, 2021
    Date of Patent: July 26, 2022
    Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PASONA KNOWLEDGE PARTNERS INC.
    Inventors: Toshikazu Koudo, Tetsuo Fukami
  • Patent number: 11385513
    Abstract: A liquid crystal display device comprising: a first liquid crystal display panel; and a second liquid crystal display panel opposed to the first liquid crystal display panel, wherein each of the first liquid crystal display panel and the second liquid crystal display panel includes a video signal line, a scanning line, a transistor provided in each pixel, and a pixel electrode provided in each pixel, and at least one of the video signal line, the scanning line, a semiconductor layer of the transistor, and the pixel electrode is patterned in an identical shape in the first liquid crystal display panel and the second liquid crystal display panel.
    Type: Grant
    Filed: February 7, 2020
    Date of Patent: July 12, 2022
    Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PASONA KNOWLEDGE PARTNER INC.
    Inventor: Teruhisa Nakagawa
  • Patent number: 11347117
    Abstract: A liquid crystal display panel includes: a plurality of pixels arranged in a matrix; a plurality of pixel electrodes and a plurality of transistors provided in each of the plurality of pixels; and a scanning line connected to the plurality of transistors in each of the plurality of pixels arranged in a first direction. In each of the plurality of pixels, the plurality of pixel electrodes and the plurality of transistors are arranged in the first direction.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: May 31, 2022
    Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PASONA KNOWLEDGE PARTNER INC.
    Inventor: Daisuke Kajita
  • Patent number: 11340484
    Abstract: A display device includes: a first display panel; a first flexible substrate on which a first driver IC outputting a driving signal to the first display panel is mounted; a second flexible substrate being apart from the first flexible substrate, at least a part of the second flexible substrate overlapping the first flexible substrate; and an insulating material disposed between the first flexible substrate and the second flexible substrate. The first flexible substrate is connected to the first display panel so that the first driver IC is on a side of the second flexible substrate. The insulating material is disposed between the first driver IC and the second flexible substrate.
    Type: Grant
    Filed: July 7, 2020
    Date of Patent: May 24, 2022
    Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PASONA KNOWLEDGE PARTNER INC.
    Inventors: Yusuke Katagiri, Masaki Tsubokura
  • Patent number: 11333935
    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 extending in a row direction or a column direction; a transistor provided in each of the plurality of pixels; and a pixel electrode provided in each of the plurality of pixels and connected to the first signal line corresponding to the pixel via the transistor corresponding to the pixel, 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.
    Type: Grant
    Filed: January 30, 2020
    Date of Patent: May 17, 2022
    Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PASONA KNOWLEDGE PARTNER INC.
    Inventor: Teruhisa Nakagawa
  • Patent number: 11328680
    Abstract: An image processing device that generates a second output image signal output to a second liquid crystal panel that is disposed to be superposed on a first liquid crystal panel, includes: a first corrector that generates a gamma correction signal in which a gradation value of an input image signal is corrected; a detector that receives the gamma correction signal and detects an image region brighter than surroundings as a first high-frequency portion from the gamma correction signal; and a second corrector that receives the gamma correction signal and a detection result of the detector and performs correction to decrease the gradation value of the first high-frequency portion in the gamma correction signal. The second output image signal is generated based on the gamma correction signal corrected by the second corrector.
    Type: Grant
    Filed: November 12, 2020
    Date of Patent: May 10, 2022
    Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PASONA KNOWLEDGE PARTNER INC.
    Inventors: Hideyuki Nakanishi, Katsuhiro Kikuchi, Takenobu Nishiguchi, Tatsuo Itoman
  • 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: 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: 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: 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: 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: 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: 11081068
    Abstract: A liquid crystal display device that displays an input video signal according to a present disclosure comprises: a first liquid crystal display panel and a second liquid crystal display panel disposed to be laminated; a first video signal generator that generates a first video signal for the first liquid crystal display panel by performing stereoscopic vision suppression processing of suppressing stereoscopic vision due to parallax on the 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, wherein when the video signal indicates a black spot, the first video signal generator performs the stereoscopic vision suppression processing with intensity different from that in a case where the video signal indicates a bright spot.
    Type: Grant
    Filed: December 10, 2019
    Date of Patent: August 3, 2021
    Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PASONA KNOWLEDGE PARTNER INC.
    Inventors: Toshikazu Koudo, Hideyuki Nakanishi
  • 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
  • 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