Patents Assigned to Sakai Display Products Corporation
  • Patent number: 11361720
    Abstract: A grayscale voltage output unit outputs, for a signal line including a disconnection location, a first grayscale voltage to a first signal line portion, the first grayscale voltage being corrected to be lower than the grayscale voltage to be output to the signal line on the basis of the location of the disconnection location and the wiring resistance of the signal line, and the grayscale voltage output unit outputs a second grayscale voltage to a second signal line portion, the second grayscale voltage being corrected from the grayscale voltage to be output to the signal line on the basis of the location of the disconnection location, the wiring resistance of the signal line, and the wiring resistance of spare wiring. Thereby, a display device with a simple configuration capable of reducing luminance deviation along a signal line with a disconnection location is provided.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: June 14, 2022
    Assignee: SAKAI DISPLAY PRODUCTS CORPORATION
    Inventor: Shiro Miyawaki
  • Patent number: 11347115
    Abstract: A liquid crystal display panel includes a first substrate section having a first substrate and pixel electrodes (102). Each pixel electrode (102) includes a bridging portion (102c) provided between a first pixel electrode portion (102a) and a second pixel electrode portion (102b) and linking together the first pixel electrode portion (102a) and the second pixel electrode portion (102b). A first recess (102d) is provided at one side along the width direction of the pixel electrode (102), the first recess (102d) extending from one side along the width direction of the pixel electrode (102) toward the bridging portion (102c) and being located between the first pixel electrode portion (102a) and the second pixel electrode portion (102b).
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: May 31, 2022
    Assignees: SAKAI DISPLAY PRODUCTS CORPORATION, SHARP KABUSHIKI KAISHA
    Inventors: Mitsuaki Hirata, Fumikazu Shimoshikiryoh
  • Patent number: 11335752
    Abstract: This organic-EL display apparatus comprises: a substrate with a drive circuit comprising a thin-film transistor (TFT), a planarizing layer to cover the drive circuit, and an organic light-emitting element formed upon the surface of the planarizing layer facing the opposite direction from the drive circuit. The surface of the planarizing layer has an arithmetic average roughness of 50 nm or less. The TFT comprises a drain electrode, a source electrode, and a semiconductor layer that includes regions to be a channel of TFT and partially overlaps with the source and drain electrodes. Respective parts of a first conductor layer forming the drain electrode and a second conductor layer forming the source electrode are arranged in an alternating manner along a prescribed direction, and the region to be the channel is sandwiched between the part of the first conductor layer and the part of the second conductor layer.
    Type: Grant
    Filed: July 9, 2021
    Date of Patent: May 17, 2022
    Assignee: SAKAI DISPLAY PRODUCTS CORPORATION
    Inventors: Katsuhiko Kishimoto, Yukiya Nishioka
  • Patent number: 11287698
    Abstract: A liquid crystal display apparatus includes a liquid crystal display panel and a backlight device disposed on a rear face of the liquid crystal display panel. The backlight device includes a chassis, a plurality of LED units being disposed on the chassis and arranged in at least one direction, and a cooling structure thermally coupled to rear faces of the plurality of LED units. The cooling structure includes a plurality of enclosed spaces, each of the plurality of enclosed spaces containing a coolant in which a liquid phase and a gas phase coexist at room temperature. Each of the plurality of enclosed spaces is disposed correspondingly to at least one LED unit among the plurality of LED units arranged in the at least one direction.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: March 29, 2022
    Assignee: SAKAI DISPLAY PRODUCTS CORPORATION
    Inventors: Mayumi Hori, Kazuhiko Negoro, Kenichi Iwamoto, Akira Toyama, Makoto Noda
  • Patent number: 11279544
    Abstract: A container (100) having: a housing member (10) having a bottom surface member (12) and a side surface member (14); and a protective member (220a) having a receiving surface in contact with an item to be housed. The bottom surface member defines the xy plane and the side surface member defines the xz plane and the yz plane that are orthogonal to the xy plane. The side surface member has a cut-out section (15a) that faces a housing space. The protective member (220a) has: an inside member (122a) comprising a receiving section having first receiving surface (123) parallel to the yz plane and a second receiving surface (124) parallel to the xz plane; and an outside member (232a) arranged at least between the inside member and a side surface parallel to the yz plane of the side surface member, said outside member being fitted to the inside member (122a) so as to be slidable in a direction intersecting the floor surface.
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: March 22, 2022
    Assignee: SAKAI DISPLAY PRODUCTS CORPORATION
    Inventor: Kazuki Nakamichi
  • Patent number: 11270659
    Abstract: A liquid crystal display apparatus includes: a liquid crystal display panel having a first substrate, a second substrate, and a vertical alignment type liquid crystal layer; and a control circuit configured to generate a display signal voltage. The first substrate has pixel electrodes to which the display signal voltage is applied, and a first alignment film. The second substrate has a counter electrode to which a common voltage is applied, and a second alignment film. Each pixel has liquid crystal domains having different reference alignment directions defined by the first and second alignment films. The pixel electrode has slits. The control circuit is configured to generate, as the display signal voltage, a voltage obtained by adding a predetermined offset voltage to an original voltage corresponding to a gray level. The offset voltage is substantially the same for gray levels higher than or equal to a predetermined intermediate gray level.
    Type: Grant
    Filed: March 10, 2020
    Date of Patent: March 8, 2022
    Assignees: SAKAI DISPLAY PRODUCTS CORPORATION, SHARP KABUSHIKI KAISHA
    Inventors: Ichiro Takada, Kentaroh Irie, Mitsuaki Hirata, Fumikazu Shimoshikiryoh
  • Patent number: 11256142
    Abstract: A liquid crystal display apparatus includes first and second substrates and a liquid crystal layer of vertical alignment type. The first substrate includes pixel electrodes and a first alignment film, whereas the second substrate includes a counter electrode and a second alignment film. Each pixel includes first and second subpixels which allow respectively different voltages to be applied across the liquid crystal layer. Each pixel electrode includes a subpixel electrode provided for each of the first and second subpixels. Each of the first and second subpixels includes first to fourth liquid crystal domains having respectively different reference alignment directions being defined by the first and second alignment films. First to fourth directions, which are the reference alignment directions of the first to fourth liquid crystal domains, each make an angle which is substantially equal to an odd multiple of 45° with respect to the pixel transverse direction.
    Type: Grant
    Filed: May 27, 2020
    Date of Patent: February 22, 2022
    Assignees: SAKAI DISPLAY PRODUCTS CORPORATION, SHARP KABUSHIKI KAISHA
    Inventors: Mitsuaki Hirata, Fumikazu Shimoshikiryoh
  • Patent number: 11232740
    Abstract: A correction image generating system comprises: a main body of an electronic apparatus, which main body comprises a display portion, a storage portion, a correction data generating portion, and an image data correcting portion; and an imaging portion. The predetermined image data is modified reference image data in which a reference image data is corrected by initial correction data generated in a manufacturing phase of the electronic apparatus; the display portion displays the reference image based on the modified reference image data; and the correction data generating portion generates the correction data based on a comparison result between the imaged image data or data based on the imaged image data, and the modified reference image data or data based on the modified reference image data.
    Type: Grant
    Filed: December 25, 2018
    Date of Patent: January 25, 2022
    Assignee: SAKAI DISPLAY PRODUCTS CORPORATION
    Inventor: Katsuhiko Kishimoto
  • Patent number: 11230759
    Abstract: A method for manufacturing a vapor deposition mask including a resin layer, and a magnetic metal body formed on the resin layer, the method including the steps of: (A) providing a magnetic metal body having at least one first opening; (B) providing a substrate; (C) forming a resin layer by applying a solution including a resin material or a varnish of a resin material on a surface of a substrate, and then performing a heat treatment thereon; (D) securing the resin layer formed on the substrate on the magnetic metal body so as to cover the at least one first opening; (E) forming a plurality of second openings in a region of the resin layer that is located in the at least one first opening of the magnetic metal body; and (F) after the step (E), removing the substrate from the resin layer.
    Type: Grant
    Filed: December 19, 2019
    Date of Patent: January 25, 2022
    Assignee: Sakai Display Products Corporation
    Inventors: Koshi Nishida, Susumu Sakio, Katsuhiko Kishimoto
  • Publication number: 20220013689
    Abstract: A micro-LED device of the present disclosure includes a crystal growth substrate (100) having an upper surface covered with a mask layer (150), the mask layer having a plurality of openings (150G), and a frontplane (200) that includes a plurality of micro-LEDs (220), each of which includes one or a plurality of semiconductor rods having a first semiconductor layer of a first conductivity type and a second semiconductor layer of a second conductivity type, and a device isolation region (240) located between the micro-LEDs. The device isolation region includes at least one metal plug (24) electrically coupled with the second semiconductor layer. This device includes a middle layer (300) which includes first contact electrodes (31) electrically coupled with the first semiconductor layer and a second contact electrode (32) coupled with the metal plug, and a backplane (400) provided on the middle layer.
    Type: Application
    Filed: December 27, 2018
    Publication date: January 13, 2022
    Applicant: SAKAI DISPLAY PRODUCTS CORPORATION
    Inventor: KATSUHIKO KISHIMOTO
  • Publication number: 20220013577
    Abstract: A micro-LED device of the present disclosure includes a crystal growth substrate (100) having an upper surface covered with a mask layer (150), the mask layer having a plurality of openings (150G), and a frontplane (200) that includes a plurality of micro-LEDs (220), each of which includes a first semiconductor layer (21) of a first conductivity type and a second semiconductor layer (22) of a second conductivity type, and a device isolation region (240) located between the micro-LEDs. The device isolation region includes at least one metal plug (24) electrically coupled with the second semiconductor layer. This device includes a middle layer (300) which includes first contact electrodes (31) electrically coupled with the first semiconductor layer and a second contact electrode (32) coupled with the metal plug, and a backplane (400) provided on the middle layer.
    Type: Application
    Filed: December 27, 2018
    Publication date: January 13, 2022
    Applicant: SAKAI DISPLAY PRODUCTS CORPORATION
    Inventor: KATSUHIKO KISHIMOTO
  • Patent number: 11211579
    Abstract: In the present embodiment, a sealing agent (50) sealing two substates contains a low melting-point glass material and is adhered to each of a first substrate (10) and a second substrate (20), a barrier rib (60), which is formed in such a manner as to surround the outer periphery of an electronic element (30), is disposed between the sealing agent (50) and the electronic element (30), and between the first substrate (10) and the second substrate (20), and the sealing agent (50) is spaced apart from the barrier rib (60). As a result, a deterioration of the electronic element, caused by the heat produced when sealing, may be prevented while the electronic element formed between the two substrates is protected from moisture and oxygen.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: December 28, 2021
    Assignees: SHARP KABUSHIKI KAISHA, SAKAI DISPLAY PRODUCTS CORPORATION
    Inventors: Yuhki Kobayashi, Shinichi Kawato, Kiyoshi Minoura, Shinji Shimada, Hiroshi Tsuchiya, Masahiro Mitani, Kohzoh Nakamura, Katsuhiko Kishimoto, Yozo Narutaki
  • Patent number: 11205770
    Abstract: According to a flexible light-emitting device production method of the present disclosure, after an intermediate region (30i) and a flexible substrate region (30d) of a plastic film (30) of a multilayer stack (100) are divided, the interface between the flexible substrate region (30d) and a glass base (10) is irradiated with lift-off light. The multilayer stack (100) is separated into the first portion (110) and the second portion (120) while the multilayer stack (100) is kept in contact with the stage (210). The first portion (110) includes a plurality of light-emitting devices (1000) which are in contact with the stage (210). The light-emitting devices (1000) include a plurality of functional layer regions (20) and the flexible substrate region (30d). The second portion (120) includes the glass base (10) and the intermediate region (30i).
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: December 21, 2021
    Assignee: SAKAI DISPLAY PRODUCTS CORPORATION
    Inventors: Katsuhiko Kishimoto, Kohichi Tanaka
  • Patent number: 11195457
    Abstract: The present invention is equipped with a substrate upon which a drive circuit containing a TFT, a planarization film, and an OLED are formed. The TFT is provided with a gate electrode, a drain electrode, a source electrode, and a semiconductor layer with regions serving as the channel and extends along a prescribed direction. The drain electrode and the source electrode are disposed such that respective portions of the drain electrode and the source electrode are arranged in an alternating manner along the prescribed direction. The connection between the drive circuit and the OLED is achieved via a conductor layer with a Ti layer and a Cu layer (Cu alloy layer) and is embedded in the interior of a contact hole formed in the planarization film, and the surface of the planarization film is formed with an arithmetic mean roughness Ra of no more than 50 nm.
    Type: Grant
    Filed: March 29, 2021
    Date of Patent: December 7, 2021
    Assignee: SAKAI DISPLAY PRODUCTS CORPORATION
    Inventors: Katsuhiko Kishimoto, Yukiya Nishioka
  • Patent number: 11183674
    Abstract: According to a method for producing a flexible OLED device of the present disclosure, a multilayer stack (100) is provided, the multilayer stack including a base (10), a functional layer region (20) which includes a TFT layer and an OLED layer, a flexible film (30) provided between the base and the functional layer region and supporting the functional layer region, and a release layer (12) provided between the flexible film and the base and bound to the base. The release layer is irradiated with lift-off light (216) transmitted through the base, whereby the flexible film is delaminated from the release layer. The release layer is made of an alloy of aluminum and silicon.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: November 23, 2021
    Assignee: SAKAI DISPLAY PRODUCTS CORPORATION
    Inventor: Katsuhiko Kishimoto
  • Patent number: 11183595
    Abstract: A thin film transistor according to one embodiment comprises a gate electrode; a semiconductor layer being formed using amorphous silicon and comprising a region overlapping with the gate electrode; a gate insulating layer; and a source electrode and a drain electrode facing each other with a predetermined interval therebetween. The gate electrode comprises a first layer having a first work function; and a second layer having a second work function and being interposed between the first layer and the gate insulating layer. The semiconductor layer comprises an intrinsic region being formed with non-doped amorphous silicon; and a low concentration impurities region. The second work function is less than the first work function when n-type impurities are contained in the low concentration impurities region, while the second work function is greater than the first work function when p-type impurities are contained in the low concentration impurities region.
    Type: Grant
    Filed: October 14, 2020
    Date of Patent: November 23, 2021
    Assignee: SAKAI DISPLAY PRODUCTS CORPORATION
    Inventor: Hiroyuki Ohta
  • Patent number: 11181781
    Abstract: A liquid crystal display panel includes a first substrate section that includes a first substrate and pixel electrodes (102). Each pixel electrode (102) includes: a first slitted region (111) in which a plurality of first slits (112A to 112G) extending along a direction parallel to the alignment azimuth of liquid crystal molecules in the first domain are formed; a second slitted region (121) in which a plurality of second slits (122A to 122H) extending along a direction parallel to the alignment azimuth of liquid crystal molecules in the second domain are formed; and a boundary region (131) provided between the first slitted region (111) and the second slitted region (121). No slits are formed in the first and second end portions (131a, 131c) of the boundary region (131), and at least one third slit (132) is formed in the central portion (131b) of the boundary region (131).
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: November 23, 2021
    Assignees: SAKAI DISPLAY PRODUCTS CORPORATION, SHARP KABUSHIKI KAISHA
    Inventors: Mitsuaki Hirata, Fumikazu Shimoshikiryoh
  • Publication number: 20210358998
    Abstract: A micro-LED device of the present disclosure includes a crystal growth substrate (100) and a frontplane (200) that includes a plurality of micro-LEDs (220), each of which includes a first semiconductor layer (21) of a first conductivity type and a second semiconductor layer (22) of a second conductivity type, and a device isolation region (240) located between the micro-LEDs. The device isolation region includes at least one metal plug (24) electrically coupled with the second semiconductor layer. This device includes a middle layer (300) which includes first contact electrodes (31) electrically coupled with the first semiconductor layer and a second contact electrode (32) coupled with the metal plug, a backplane (400) provided on the middle layer, and a titanium nitride layer (50) located between the substrate and the second semiconductor layer.
    Type: Application
    Filed: November 16, 2018
    Publication date: November 18, 2021
    Applicants: SAKAI DISPLAY PRODUCTS CORPORATION, SAKAI DISPLAY PRODUCTS CORPORATION
    Inventor: KATSUHIKO KISHIMOTO
  • Patent number: 11177466
    Abstract: A display apparatus comprises: a display panel to control emission or transmission of light to display an image; a support comprising a surface on which the display panel is placed; and a holding member that is adhered onto the surface of the support and engages with an edge of the display panel to hold the display panel at a given position of the surface, wherein the display panel has an opposite surface of a display surface of the display panel, the opposite surface being directed to the support; the holding member comprises a front surface portion formed using a light-transmitting material to cover the display surface, the front surface portion being plate shaped, and a frame portion comprising a rod-shaped member provided in such a manner as to be protruded from a first surface of the front surface portion and to be along an edge of the front surface portion, the first surface being directed to the display surface; and the front surface portion comprises a first functional layer on the first surface or on
    Type: Grant
    Filed: April 23, 2021
    Date of Patent: November 16, 2021
    Assignee: Sakai Display Products Corporation
    Inventor: Katsuhiko Kishimoto
  • Patent number: 11165043
    Abstract: A thin film encapsulation structure included in an organic electroluminescent display device includes a first inorganic barrier layer, an organic barrier layer, and a second inorganic barrier layer. The thin film encapsulation structure is formed on an active region and an active region side portion of lead wires. Each lead wire at least partially includes, at least on lowermost portions of two side surfaces thereof in contact with the first inorganic barrier layer, a forward tapering side surface portion having a tapering angle smaller than 90 degrees in a cross-section parallel to a line width direction thereof. The thin film encapsulation structure further includes an inorganic barrier layer joint portion. On portions of the lead wires having the forward tapering side surface portions, the inorganic barrier layer joint portion is formed and the active region is completely enclosed by the inorganic barrier layer joint portion.
    Type: Grant
    Filed: June 9, 2020
    Date of Patent: November 2, 2021
    Assignee: SAKAI DISPLAY PRODUCTS CORPORATION
    Inventor: Katsuhiko Kishimoto