Patents by Inventor Katsuhiro Kikuchi

Katsuhiro Kikuchi 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).

  • Publication number: 20210134765
    Abstract: There is provided a display device including: a plurality of unit regions disposed adjacent to each other; a first region that is provided in each of the unit regions, and emits first light; and a second region that is provided outside the first region in each of the unit regions, and emits second light, the second light being different from the first light in at least one of luminance, wavelength, or surface-reflection component, the second regions being provided between adjacent ones of the first regions, and a difference in luminance, wavelength, or surface-reflection component between the second light to be emitted from adjacent ones of the unit regions being smaller than a difference in luminance, wavelength, or surface-reflection component between the first light and the second light in a same one of the unit regions.
    Type: Application
    Filed: May 7, 2018
    Publication date: May 6, 2021
    Inventors: AKIRA OHMAE, YUSUKE KATAOKA, TATSUO OHASHI, NORIFUMI KIKUCHI, KATSUHIRO TOMODA, GOSHI BIWA, IPPEI NISHINAKA
  • 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: 10826021
    Abstract: An organic electroluminescence device according to one aspect of the disclosure includes a base material including a recessed portion on an upper face, and a light emitting element including a reflective layer, a filling layer having optical transparency, a first electrode having optical transparency, an organic layer including at least a light emitting layer, and a second electrode having optical transparency. The reflective layer is disposed at least on a surface of the recessed portion. The filling layer is disposed at an inside of the recessed portion with the reflective layer interposed between the recessed portion and the filling layer. The first electrode is disposed at least on an upper-layer side of the filling layer. The organic layer is disposed on an upper layer of the first electrode. The second electrode is disposed on an upper-layer side of the organic layer. The organic electroluminescence device includes a display region that is divided into a plurality of unit regions.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: November 3, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hideki Uchida, Katsuhiro Kikuchi, Yoshiyuki Isomura, Masanori Ohara, Satoshi Inoue, Eiji Koike, Yuto Tsukamoto, Asae Ito
  • Patent number: 10789901
    Abstract: A LCD device of display panels includes n-bit (n<m) driving first display panel that displays first image based on m-bit input image data, n-bit driving second display panel that displays second image based on the m-bit input image data, and image processor including first gradation converter that converts gradation of the m-bit input image data into n-bit gradation, second gradation converter that converts gradation of the m-bit input image data into m1-bit (m1?m) gradation, and extension processor that performs extension processing of extending gradation expression with the n bits on the input image data converted into the m1-bit gradation. The n-bit driving first display panel displays the first image based on the n-bit input image data, and the n-bit driving second display panel displays the second image based on the n-bit input image data subjected to the extension processing.
    Type: Grant
    Filed: April 30, 2020
    Date of Patent: September 29, 2020
    Assignees: Panasonic Liquid Crystal Display Co., Ltd., Pasona Knowledge Partner Inc.
    Inventors: Hideyuki Nakanishi, Toshikazu Koudo, Katsuhiro Kikuchi
  • Publication number: 20200258459
    Abstract: A LCD device of display panels includes n-bit (n<m) driving first display panel that displays first image based on m-bit input image data, n-bit driving second display panel that displays second image based on the m-bit input image data, and image processor including first gradation converter that converts gradation of the m-bit input image data into n-bit gradation, second gradation converter that converts gradation of the m-bit input image data into m1-bit (m1?m) gradation, and extension processor that performs extension processing of extending gradation expression with the n bits on the input image data converted into the m1-bit gradation. The n-bit driving first display panel displays the first image based on the n-bit input image data, and the n-bit driving second display panel displays the second image based on the n-bit input image data subjected to the extension processing.
    Type: Application
    Filed: April 30, 2020
    Publication date: August 13, 2020
    Inventors: Hideyuki NAKANISHI, Toshikazu KOUDO, Katsuhiro KIKUCHI
  • Publication number: 20200226968
    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: Application
    Filed: April 1, 2020
    Publication date: July 16, 2020
    Inventors: Toshikazu KOUDO, Masahiro ISHII, Katsuhiro KIKUCHI, Ikuko MORI
  • Patent number: 10679574
    Abstract: A LCD device of display panels includes n-bit (n<m) driving first display panel that displays first image based on m-bit input image data, n-bit driving second display panel that displays second image based on the m-bit input image data, and image processor including first gradation converter that converts gradation of the m-bit input image data into n-bit gradation, second gradation converter that converts gradation of the m-bit input image data into m1-bit (m1?m) gradation, and extension processor that performs extension processing of extending gradation expression with the n bits on the input image data converted into the m1-bit gradation. The n-bit driving first display panel displays the first image based on the n-bit input image data, and the n-bit driving second display panel displays the second image based on the n-bit input image data subjected to the extension processing.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: June 9, 2020
    Assignee: Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Hideyuki Nakanishi, Toshikazu Koudo, Katsuhiro Kikuchi
  • Publication number: 20200175946
    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: Application
    Filed: November 25, 2019
    Publication date: June 4, 2020
    Inventors: Hideyuki NAKANISHI, Toshikazu KOUDO, Katsuhiro KIKUCHI
  • Patent number: 10658607
    Abstract: An organic EL element (10) includes a first light-emitting layer (33a) having the shortest emission peak wavelength of a light-emitting layer (33) and containing a host material and a TTF material or at least the TTF material, a second light-emitting layer (33b) containing at least a TADF material, a third light-emitting layer (33c) having the longest emission peak wavelength of the light-emitting layer (33) and containing at least fluorescent material. The excited triplet level of the TTF material is lower than the excited triplet level of the TADF material.
    Type: Grant
    Filed: July 2, 2019
    Date of Patent: May 19, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Yuto Tsukamoto, Katsuhiro Kikuchi, Shinichi Kawato, Manabu Niboshi, Eiji Koike, Asae Ito
  • Patent number: 10651253
    Abstract: A light emitting element including at least a first trench portion having an indented shape within a single light emitting region. The first trench portion includes a first electrode, an EL layer, and a second electrode. The first electrode, the EL layer, and the second electrode are layered in this order and in contact with each other. At least one of the first electrode or the second electrode includes a reflective electrode.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: May 12, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Masanori Ohara, Hideki Uchida, Katsuhiro Kikuchi, Satoshi Inoue, Yuto Tsukamoto, Kazuki Matsunaga, Eiji Koike
  • Patent number: 10643518
    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: September 5, 2019
    Date of Patent: May 5, 2020
    Assignee: Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Toshikazu Koudo, Masahiro Ishii, Katsuhiro Kikuchi, Ikuko Mori
  • Patent number: 10614757
    Abstract: An organic EL panel 10 is a bendable display panel including a plurality of pixel circuits 60 each having a light emitting element and a drive element. A data line drive circuit 15 performs, by driving data lines, an operation of writing a voltage to a control terminal of the drive element and an operation of measuring a current flowing through the drive element for the pixel circuits 60 selected by a scanning line drive circuit 14. A bending detection unit 90 detects a bending state of the organic EL panel 10 based on a measurement result of the current flowing through the drive element. A correction unit 80 corrects a video signal VS1 based on the detected bending state. With this, the bending state of a screen is detected and a change in brightness or color when the screen is bent is prevented.
    Type: Grant
    Filed: November 25, 2016
    Date of Patent: April 7, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Kazuo Takizawa, Noritaka Kishi, Naoko Gotoh, Hideki Uchida, Katsuhiro Kikuchi
  • Patent number: 10598983
    Abstract: A liquid crystal display device includes: a first polarizing plate, a first liquid crystal cell, a second polarizing plate, a third polarizing plate, a second liquid crystal cell, and a fourth polarizing plate, which are arranged from a front side to a back side in this order. P1, P2, P3, P4 represent degrees of polarization of the first polarizing plate, the second polarizing plate, the third polarizing plate, and the fourth polarizing plate, respectively, one of a relational expression of P1>P2, P3, P4, a relational expressions of P4>P1, P2, P3, and a relational expression of P1, P4>P2, P3 is satisfied.
    Type: Grant
    Filed: November 5, 2018
    Date of Patent: March 24, 2020
    Assignee: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
    Inventors: Yoichi Yasui, Katsuhiro Kikuchi, Kazuhiko Tsuda
  • Patent number: 10597770
    Abstract: Provided is a line source that can achieve uniform film thickness distribution and also achieve high use efficiency of vapor deposition materials. A line source (10) has slit nozzles (1) having a slit nozzle's length-to-width ratio of 4 to 50, a width of 1 mm to 5 mm, and a depth of 5 mm to 20 mm.
    Type: Grant
    Filed: July 21, 2016
    Date of Patent: March 24, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Shinichi Kawato, Katsuhiro Kikuchi, Manabu Niboshi, Satoshi Inoue, Yuhki Kobayashi
  • Patent number: 10541377
    Abstract: The organic EL element (10) at least includes, between a first electrode (2) and a second electrode (4), at least one layer of an exciton generating layer (33) which contains at least one type of TADF material as a host material and at least one layer of a fluorescent emission layer (34) which contains at least one type of fluorescent emission material.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: January 21, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Yuto Tsukamoto, Katsuhiro Kikuchi, Hideki Uchida, Eiji Koike, Satoshi Inoue, Masanori Ohara, Kazuki Matsunaga
  • Publication number: 20190392749
    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: Application
    Filed: September 5, 2019
    Publication date: December 26, 2019
    Inventors: Toshikazu KOUDO, Masahiro ISHII, Katsuhiro KIKUCHI, Ikuko MORI
  • Patent number: 10516131
    Abstract: An organic EL device of one aspect of the disclosure includes: a base material; an insulating layer provided with a recessed portion on an upper face thereof; and a light-emitting element including a reflective layer provided on at least a surface of the recessed portion, a filling layer having optical transparency and filling the inside of the recessed portion with the reflective layer interposed between the filling layer and the recessed portion, a first electrode having optical transparency and provided on at least an upper layer side of the filling layer, an organic layer containing at least a light-emitting layer provided on an upper layer of the first electrode, a second electrode having optical transparency and provided on an upper layer side of the organic layer, and an edge cover layer covering at least an end portion of the first electrode, wherein the organic electroluminescence device includes a plurality of unit light emitting regions separated from one another, an excavated portion is provided i
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: December 24, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Eiji Koike, Katsuhiro Kikuchi, Shinichi Kawato, Satoshi Inoue
  • Patent number: 10476033
    Abstract: A light-emitting element includes at least a first trench portion having an indented shape within a single light-emitting region. In the first trench portion, a first electrode, an EL layer, and a second electrode are layered in this order and in contact with each other. One of the first electrode and the second electrode includes a reflective electrode, and concave-convex portions of the submicron order configured to diffract surface plasmons are provided on the surface of the reflective electrode on a side closer to the EL layer.
    Type: Grant
    Filed: November 20, 2015
    Date of Patent: November 12, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Masanori Ohara, Hideki Uchida, Katsuhiro Kikuchi, Satoshi Inoue, Yuto Tsukamoto, Kazuki Matsunaga, Eiji Koike
  • Patent number: 10467968
    Abstract: A liquid crystal display device includes: a first display panel displaying a first image; a second display panel displaying a second image; and an image processor generating first and second image data based on input video signal. The image processor includes a first differential filtering processor, a multiplier that multiplies a grayscale of the image data subjected to the differential filtering by the first differential filtering processor by a correction coefficient, and a first smoothing processor that performs smoothing processing on image data obtained by adding the image data multiplied by the correction coefficient and the image data based on the input video signal. The image processor generates the first image data based on the image data based on the input video signal and the image data subjected to the smoothing processing, and generates the second image data based on the image data subjected to the smoothing processing.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: November 5, 2019
    Assignee: Panasonic Liquid Crystal Display Co. Ltd.
    Inventors: Toshikazu Koudo, Hideyuki Nakanishi, Katsuhiro Kikuchi
  • Publication number: 20190326540
    Abstract: An organic EL element (10) includes a first light-emitting layer (33a) having the shortest emission peak wavelength of a light-emitting layer (33) and containing a host material and a TTF material or at least the TTF material, a second light-emitting layer (33b) containing at least a TADF material, a third light-emitting layer (33c) having the longest emission peak wavelength of the light-emitting layer (33) and containing at least fluorescent material. The excited triplet level of the TTF material is lower than the excited triplet level of the TADF material.
    Type: Application
    Filed: July 2, 2019
    Publication date: October 24, 2019
    Inventors: Yuto TSUKAMOTO, Katsuhiro KIKUCHI, Shinichi KAWATO, Manabu NIBOSHI, Eiji KOIKE, Asae ITO