Patents Assigned to Sharp Display Technology Corporation
  • Patent number: 12124142
    Abstract: The display device includes: a color display element including pixels that are arranged in a row direction and in a column direction and each include sub-pixels of different colors; and a liquid crystal display panel stacked with the color display element, the liquid crystal display panel including a TFT substrate, a counter substrate, and a liquid crystal layer, the TFT substrate including first bus lines extending in a first direction, second bus lines extending in a second direction intersecting the first direction, and display electrodes each at a position corresponding to an intersection of one of the first bus lines and one of the second bus lines, at least one of the first bus lines and at least one of the second bus lines each overlapping at least some sub-pixels of all colors among the sub-pixels of different colors of the color display element in a plan view.
    Type: Grant
    Filed: June 16, 2022
    Date of Patent: October 22, 2024
    Assignee: SHARP DISPLAY TECHNOLOGY CORPORATION
    Inventor: Fumikazu Shimoshikiryoh
  • Patent number: 12117705
    Abstract: A liquid crystal display apparatus includes a TFT substrate including first and second gate bus lines, source bus lines, and pixels and a liquid crystal layer. The pixel includes a pixel electrode, a common electrode, an auxiliary electrode, and first to third TFTs. The gates of the first and second TFTs are connected to one of the first and second gate bus lines, and the drains are connected to the pixel electrode and the auxiliary electrode, respectively. The gate of the third TFT is connected to the other of the first and second gate bus lines, and the source and drain of the third TFT are connected to the pixel electrode and the auxiliary electrode, respectively. Gate signals are applied to the first and second gate bus lines so that the TFTs connected to the first and second gate bus lines are turned on at different points in time.
    Type: Grant
    Filed: October 9, 2023
    Date of Patent: October 15, 2024
    Assignee: Sharp Display Technology Corporation
    Inventor: Masakatsu Tominaga
  • Patent number: 12117706
    Abstract: An active matrix substrate includes a pixel TFT provided corresponding to each pixel region, a pixel electrode electrically connected to the pixel TFT, a plurality of gate wirings extending in a row direction, and a plurality of source wirings extending in a column direction. Each gate wiring has a multilayer structure including a lower gate wiring electrically connected to a lower gate electrode included in the pixel TFT and an upper gate wiring electrically connected to an upper gate electrode included in the pixel TFT. In a case where the number of the gate wirings is defined as m and the number of the source wirings is defined as n, each gate wiring has 3 or more and less than n contact portions, each contact portion is positioned in any of n intersection regions, and the number of the contact portions overlapping each source wiring is less than m.
    Type: Grant
    Filed: January 8, 2024
    Date of Patent: October 15, 2024
    Assignee: Sharp Display Technology Corporation
    Inventors: Kengo Hara, Tohru Daitoh, Yoshihito Hara, Jun Nishimura, Yohei Takeuchi
  • Patent number: 12117679
    Abstract: Provided is a liquid crystal display device that can switch between the privacy mode and the public mode and achieve a high contrast ratio even during display in the privacy mode. The liquid crystal display panel includes: a liquid crystal panel; and a control circuit. The active matrix substrate sequentially includes a first substrate, a first electrode, a first insulating layer, and second electrodes each including a first linear electrode. The color filter substrate includes a second substrate, a black matrix, a color filter layer, a third electrode, and a fourth electrode which is disposed between the black matrix and the third electrode and to which constant voltage is applied. The third electrode includes second linear electrodes and overlaps a portion of the black matrix in a plan view. The control circuit switches between application of driving voltage and application of constant voltage to the third electrode.
    Type: Grant
    Filed: January 13, 2023
    Date of Patent: October 15, 2024
    Assignee: Sharp Display Technology Corporation
    Inventors: Koji Murata, Hiroshi Tsuchiya, Shinpei Higashida, Takahiro Sasaki, Takashi Satoh, Shinji Shimada
  • Patent number: 12118164
    Abstract: A touch panel system includes a capacitive touch panel and a controller that controls the touch panel. The touch panel includes a plurality of drive electrodes and a plurality of floating island electrodes located on a first substrate and a plurality of pressure detection electrodes and a plurality of position detection electrodes located on a second substrate. The controller provides a drive signal to the drive electrodes and corrects a pressure detection signal obtained from each of the pressure detection electrodes by using a position detection signal obtained from the position detection electrode.
    Type: Grant
    Filed: March 29, 2023
    Date of Patent: October 15, 2024
    Assignee: Sharp Display Technology Corporation
    Inventors: Takenori Maruyama, Kazutoshi Kida, Shinji Yamagishi, Takuma Yamamoto, Yasuhiro Sugita, Hiroshi Fukushima
  • Patent number: 12117697
    Abstract: A liquid crystal display device includes a first substrate, a second substrate, and a liquid crystal layer. Each pixel includes a reflective region and a transmissive region. The first substrate includes a reflective layer, an interlayer insulating layer provided to cover the reflective layer, and a pixel electrode provided on the interlayer insulating layer in each pixel. The interlayer insulating layer has a recess portion which is defined by a bottom surface and an inclined side surface and at least a part of which is located in the transmissive region. A depth of the recess portion of the interlayer insulating layer is 0.5 ?m or more, and an inclination angle of the inclined side surface of the recess portion is 25° or less.
    Type: Grant
    Filed: October 26, 2023
    Date of Patent: October 15, 2024
    Assignee: Sharp Display Technology Corporation
    Inventors: Mariko Honda, Nobuhiro Waka, Hiroyuki Hakoi, Takahiro Sasaki, Takashi Satoh, Akira Sakai, Seiji Maeda
  • Patent number: 12111537
    Abstract: A lighting device includes a substrate, a first conductive portion, a second conductive portion disposed with a spacing as to the first conductive portion, a first reflective layer having a first opening coinciding with the first conductive portion and a second opening coinciding with the second conductive portion, a light-emitting part connected to the first conductive portion through the first opening, a non-light-emitting part connected to the second conductive portion through the second opening, and a second reflective layer. The second reflective layer includes a first reflective portion disposed around the light-emitting part, and a second reflective portion disposed around the non-light-emitting part.
    Type: Grant
    Filed: January 22, 2024
    Date of Patent: October 8, 2024
    Assignee: Sharp Display Technology Corporation
    Inventors: Takeshi Masuda, Hisashi Watanabe, Hirotoshi Yasunaga
  • Patent number: 12112004
    Abstract: An active matrix substrate includes a touch electrode disposed in a pixel region, a frame touch electrode disposed in a frame region, and a dummy array segment disposed in the frame region. The frame region includes a first dummy region, provided in a position adjacent to the pixel region, where the frame touch electrode is disposed and a second dummy region provided in a position opposite to the pixel region across the first dummy region. In the second dummy region, the frame touch electrode is not disposed, but the dummy array segment is disposed.
    Type: Grant
    Filed: October 24, 2022
    Date of Patent: October 8, 2024
    Assignee: Sharp Display Technology Corporation
    Inventor: Yohsuke Fujikawa
  • Patent number: 12111490
    Abstract: An illumination device includes a plurality of light sources arranged in a row, a light guide plate having a plate shape and including a first end face at an outer peripheral end face of the light guide plate and a first main surface included in a pair of main surfaces of the light guide plate, the first end face facing the plurality of light sources and being configured to receive incident light, the first main surface being configured to emit light, and a plurality of first lenses disposed at the first main surface, arranged along a first direction, and extending along a second direction, the first direction being an arrangement direction of the plurality of light sources, the second direction intersecting the first direction and extending along the first main surface.
    Type: Grant
    Filed: June 23, 2023
    Date of Patent: October 8, 2024
    Assignee: Sharp Display Technology Corporation
    Inventors: Yuuichi Kanbayashi, Shugo Yagi, Junichi Masuda, Satoshi Tsubooka
  • Patent number: 12112005
    Abstract: An electrostatic capacitive touch panel comprises a first substrate; a first electrode extending in a first direction and a first wiring line connected to the first electrode provided on the first substrate; a second substrate; a second electrode extending in a second direction that is perpendicular to the first direction and a second wiring line provided on the second substrate, wherein the first wiring line includes a first extension portion, the second wiring line includes a second extension portion, the second electrode includes: a first capacitance portion overlapping the first electrode in a plan view; and a first connecting portion having a smaller width in the first direction than does the first capacitance portion, and, with respect to the first extension portion, the second extension portion is located in the positive direction where the first connecting portion is adjacent to the first capacitance portion in the second direction.
    Type: Grant
    Filed: July 31, 2023
    Date of Patent: October 8, 2024
    Assignee: Sharp Display Technology Corporation
    Inventor: Shinya Morino
  • Patent number: 12111555
    Abstract: A method of manufacturing an active matrix substrate includes forming multiple thin film transistors corresponding to multiple subpixels on a substrate; forming color filters provided with colored layers having predetermined colors disposed on the multiple thin film transistors, respectively, and having contact holes for electrical connection to the multiple thin film transistors, respectively; forming a first transparent electrode by forming a first transparent conductive film above the color filters and patterning the first transparent conductive film; forming an inorganic protection film made of an inorganic insulating film on the first transparent electrode; forming a second transparent conductive film on the inorganic protection film; forming antireflection layers on the second transparent conductive film, each of the antireflection layers formed by layering a metal layer and an inorganic insulating layer and overlapping a boundary portion between the colored layers; and forming a second transparent elec
    Type: Grant
    Filed: April 18, 2023
    Date of Patent: October 8, 2024
    Assignee: Sharp Display Technology Corporation
    Inventor: Katsunori Misaki
  • Patent number: 12105387
    Abstract: A display device includes: a first substrate, a second substrate, a light-blocking portion, a pixel, and a wiring line. The second substrate has a main face opposite a main face of the first substrate. The light-blocking portion is disposed on the main face of the first substrate, including an opening, and blocking light. The pixel is disposed on the main faces of the first substrate and the second substrate and delimited by at least a part of the opening. The wiring line is disposed on the main face of the second substrate and at least partially overlapping the opening. The wiring line has a projection protruding toward a first substrate side. The projection has a surface including a curved surface and comprises a plurality of projections disposed at intervals in locations overlapping at least the opening.
    Type: Grant
    Filed: April 27, 2023
    Date of Patent: October 1, 2024
    Assignee: Sharp Display Technology Corporation
    Inventors: Hiroaki Wada, Junichi Mori, Takumi Tomita, Kenichi Nishimura, Hiroto Akiyama
  • Patent number: 12105389
    Abstract: A display panel including: a plurality of pixels arranged in a longitudinal direction and a lateral direction; a plurality of pixel electrodes; a common electrode; a first, second, third, and fourth gate lines extending in the lateral direction; and a first and second data lines, and a common line extending in the longitudinal direction, in which the plurality of pixels include a first pixel having a first pixel electrode and a second pixel adjacent to the first pixel in the lateral direction and having a second pixel electrode, the third gate line is arranged to overlap the first and the second pixel electrodes, the common line is arranged between the first and the second pixel electrodes, and the display panel further includes a first switching element connected to the first pixel electrode, the common line, and the third gate line, and a second switching element connected to the second pixel electrode, the common line, and the third gate line.
    Type: Grant
    Filed: March 4, 2024
    Date of Patent: October 1, 2024
    Assignee: Sharp Display Technology Corporation
    Inventor: Masakatsu Tominaga
  • Patent number: 12105392
    Abstract: A display device includes a first pixel electrode, a first switching element, a first wiring, a second pixel electrode, a second switching element, a second wiring, a third wiring, a fourth wiring, a first insulating film, a second insulating film, and an alignment film, in which the first wiring includes a first lead-out portion disposed outside the display region and located on a lower layer side of the first insulating film, the second wiring includes a second lead-out portion disposed adjacent to the first lead-out portion outside the display region and located on a lower layer side of the second insulating film, the third wiring is located on the lower layer side of the first insulating film, and the fourth wiring is located on the lower layer side of the second insulating film on the upper layer side of the first insulating film.
    Type: Grant
    Filed: November 1, 2023
    Date of Patent: October 1, 2024
    Assignee: Sharp Display Technology Corporation
    Inventors: Takahiro Koshiba, Hiroto Akiyama
  • Patent number: 12100358
    Abstract: A unit circuit constituting each of stages of a shift register is provided with a thin film transistor, the thin film transistor including a control terminal applied with one of a plurality of gate clock signals, a first conduction terminal connected to a third node, and a second conduction terminal applied with a direct current power supply voltage of a low level. The third node is connected to a control terminal of a thin film transistor configured to change a potential of a second node toward a high level. When a gate clock signal applied to a control terminal of a thin film transistor configured to change a potential of the third node toward the high level changes from the high level to the low level, the gate clock signal applied to the control terminal of the thin film transistor changes from the low level to the high level.
    Type: Grant
    Filed: November 8, 2023
    Date of Patent: September 24, 2024
    Assignee: Sharp Display Technology Corporation
    Inventors: Seiya Kawamorita, Satoshi Horiuchi, Yasuaki Iwase
  • Patent number: 12100353
    Abstract: In a display device including pixel circuits including oxide TFTs, degradation in display quality caused by light irradiation onto the oxide TFTs is suppressed. A TFT having a channel region formed of silicon is adopted as a drive transistor. A TFT having a gate electrode; a first conductive electrode and a second conductive electrode that function as a drain electrode and a source electrode; a back-gate electrode; and a channel region formed of an oxide semiconductor is adopted as a threshold voltage compensation transistor. A second conductive electrode of the drive transistor is connected to the first conductive electrode of the threshold voltage compensation transistor, and a gate electrode of the drive transistor is connected to the second conductive electrode of the threshold voltage compensation transistor. Silicon connected to the second conductive electrode of the drive transistor is used as the back-gate electrode of the threshold voltage compensation transistor.
    Type: Grant
    Filed: June 8, 2021
    Date of Patent: September 24, 2024
    Assignee: SHARP DISPLAY TECHNOLOGY CORPORATION
    Inventor: Tamotsu Sakai
  • Patent number: 12099229
    Abstract: According to an aspect of the disclosure, an illumination device includes: a first light source; a first light guide plate including at least a part of an outer circumferential end face as a first end face configured to face the first light source and receive incident light, a first main surface, and a second main surface; a first sheet including one main surface as a third main surface configured to face the first main surface and a fourth main surface; a second light source; and a second light guide plate including at least a part of an outer circumferential end face as a second end face configured to face the second light source, a fifth main surface, and a sixth main surface configured to face the fourth main surface.
    Type: Grant
    Filed: February 22, 2023
    Date of Patent: September 24, 2024
    Assignee: Sharp Display Technology Corporation
    Inventors: Shugo Yagi, Junichi Masuda, Yuuichi Kanbayashi, Satoshi Tsubooka
  • Patent number: 12086356
    Abstract: A display device with a touch panel is provided with a transmission touch electrode, a reception touch electrode, a transmission reference electrode formed from the same material as the transmission touch electrode, a reception reference electrode formed from the same material as the reception touch electrode, a reference electrode that faces the transmission reference electrode and to which a predetermined potential is applied, and a touch control circuit that detects a touch by a pointer on the basis of a comparison between a touch detection signal from the reception touch electrode and a detection threshold value. The reception reference electrode outputs a reference signal based on a capacitance formed between the reception reference electrode and the transmission reference electrode, and the touch control circuit changes the detection threshold value in accordance with a change in the reference signal.
    Type: Grant
    Filed: January 3, 2023
    Date of Patent: September 10, 2024
    Assignee: Sharp Display Technology Corporation
    Inventors: Takuya Henmi, Satoshi Sekido, Keisuke Kanda, Yuhji Satoh
  • Patent number: 12078878
    Abstract: A viewing angle control liquid crystal panel includes: a first polarizer having a first absorption axis; a first liquid crystal panel including a first substrate, a first liquid crystal layer, and a second substrate; a second liquid crystal panel including a third substrate, a second liquid crystal layer, and a fourth substrate; and a third liquid crystal panel including a fifth substrate, a third liquid crystal layer, and a sixth substrate. The following equations are satisfied, where ?P1 is an azimuth angle of the first absorption axis and ?1, ?2, ?3, ?4, ?5, and ?6 are azimuth angles of directors of liquid crystal molecules on first, second, third, fourth, fifth, and sixth substrate sides: 0°?|?1??2|?5° 0°?|?P1??1|?5° 0°?|?3??4|?5° 0°?|?5??6|?5°.
    Type: Grant
    Filed: January 18, 2024
    Date of Patent: September 3, 2024
    Assignee: Sharp Display Technology Corporation
    Inventors: Koji Murata, Akira Hirai, Takashi Satoh, Akira Sakai, Kiyoshi Minoura
  • Patent number: 12078903
    Abstract: An active matrix substrate includes: a thin film transistor located in each pixel region; and a pixel electrode electrically coupled with the thin film transistor. The thin film transistor includes a lower gate electrode, a lower gate insulating layer, an oxide semiconductor layer, an upper gate insulating layer, and an upper gate electrode. The width of an upper gate line electrically coupled with the upper gate electrode is greater than the width of a lower gate line electrically coupled with the lower gate electrode.
    Type: Grant
    Filed: August 24, 2023
    Date of Patent: September 3, 2024
    Assignee: SHARP DISPLAY TECHNOLOGY CORPORATION
    Inventors: Atsushi Hachiya, Hiroaki Furukawa, Yuhichi Saitoh