Patents Assigned to Japan Display Inc.
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Publication number: 20240381693Abstract: A display device includes a light-emitting element, a first transistor controlling a current value flowing from a driving power supply line to the light-emitting element, and a second transistor applying a voltage corresponding to a luminance of the light-emitting element to a first gate electrode of the first transistor, the first transistor including the first gate electrode, a first insulating film, a first oxide semiconductor layer, a second insulating film, and a first conductive layer, the second transistor including the first insulating film, a second oxide semiconductor layer, a second insulating film, and a second gate electrode.Type: ApplicationFiled: July 23, 2024Publication date: November 14, 2024Applicant: Japan Display Inc.Inventor: Masashi TSUBUKU
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Publication number: 20240379829Abstract: A semiconductor device includes a gate electrode, a gate insulating layer over the gate electrode, an oxide semiconductor layer having a polycrystalline structure over the gate insulating layer, a source electrode and a drain electrode over the oxide semiconductor layer, and an interlayer insulating layer in contact with the oxide semiconductor layer, the interlayer insulating layer covering the source electrode and the drain electrode. The oxide semiconductor layer includes a first region overlapping one of the source electrode and the drain electrode and a second region in contact with the interlayer insulating layer. A difference between a thickness of the first region and a thickness of the second region is less than or equal to 1 nm.Type: ApplicationFiled: May 7, 2024Publication date: November 14, 2024Applicant: Japan Display Inc.Inventors: Hajime WATAKABE, Masashi TSUBUKU, Toshinari SASAKI, Takaya TAMARU, Marina MOCHIZUKI, Ryo ONODERA, Masahiro WATABE
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Publication number: 20240379730Abstract: A light emitting device includes a plurality of pixels arranged in a matrix in a first direction and in a second direction orthogonal to the first direction, over a substrate. Each of the plurality of pixels arranged in a matrix includes a conductive alignment layer over the substrate, a semiconductor layer including gallium nitride over the conductive alignment layer, a light emitting layer in an island shape over the semiconductor layer, and an electrode layer over the light emitting layer. A side surface of the light emitting layer is covered with an insulating layer. A reflective layer facing the side surface of the light emitting layer is provided over the insulating layer.Type: ApplicationFiled: July 25, 2024Publication date: November 14, 2024Applicant: Japan Display Inc.Inventor: Masumi NISHIMURA
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Patent number: 12143379Abstract: A biometric authentication system is a biometric authentication system having a detection device and an authentication device performing personal authentication. The detection device has a plurality of sensor elements, a plurality of gate lines and a plurality of signal lines provided in correspondence with the sensor elements, and gate line drive circuit scanning the gate lines.Type: GrantFiled: September 29, 2021Date of Patent: November 12, 2024Assignee: JAPAN DISPLAY INC.Inventors: Masahiro Tada, Takashi Nakamura, Akio Takimoto, Tomokatsu Kinugawa
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Patent number: 12142714Abstract: According to one embodiment, a display device includes a substrate, a base layer, a plurality of light emitting elements, a resin layer, and a light reflecting layer. The resin layer is provided on the base layer, is filled in a gap between the light emitting elements, and has a flat surface. The light reflecting layer is provided above the flat surface, and includes a mirror surface and a plurality of openings.Type: GrantFiled: June 24, 2021Date of Patent: November 12, 2024Assignee: Japan Display Inc.Inventor: Yasuhiro Kanaya
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Patent number: 12141399Abstract: Provided is a sensor module including a plurality of sensor electrodes, a plurality of sensor wirings, a plurality of auxiliary electrodes, and a driver circuit. The plurality of sensor electrodes is arranged in a matrix having first to mth rows and first to nth columns. The plurality of sensor wirings is respectively connected to the plurality of sensor electrodes. The plurality of auxiliary electrodes is respectively connected to the plurality of sensor electrodes and extends from the plurality of sensor electrodes in a direction opposite to the direction in which the plurality of sensor wirings extends from the plurality of sensor electrodes. The driver circuit is connected to the plurality of sensor wirings and is configured to obtain sensor values of the plurality of sensor electrodes on the basis of potential fluctuations of the plurality of sensor electrodes.Type: GrantFiled: May 4, 2023Date of Patent: November 12, 2024Assignee: Japan Display Inc.Inventors: Yuto Kakinoki, Hirofumi Nakagawa
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Patent number: 12142231Abstract: According to an aspect, a display device includes: a display panel having a display region in which pixel rows are arranged in a second direction; a scanning circuit configured to supply a drive signal to scan the pixel rows; a light source configured to emit light toward the display panel; and a light source control circuit configured to control light emission timing of the light source. The display region is divided into regions in the second direction and includes a first region including two or more pixel rows consecutively arranged in the second direction, and a second region except for the first region. The scanning circuit sequentially scans the pixel rows in the first region, and simultaneously scans two or more pixel rows consecutively arranged in the second direction in the second region.Type: GrantFiled: October 9, 2023Date of Patent: November 12, 2024Assignee: Japan Display Inc.Inventors: Shinichi Komura, Toshiharu Matsushima
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Patent number: 12140828Abstract: In a display device using a substrate having flexibility, a drop in reliability due to defects such as cracks in the case where a substrate is made to curve is controlled. A display device is provided including a first substrate having flexibility, the first substrate including a curved part, an organic film covering a first surface of the first substrate and a second surface opposing the first surface in the curved part; and a pixel part and a drive circuit part arranged on the first surface.Type: GrantFiled: January 11, 2023Date of Patent: November 12, 2024Assignee: Japan Display Inc.Inventor: Hsiang Yuan Cheng
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Patent number: 12140306Abstract: An optical element includes a first liquid crystal cell and a second liquid crystal cell. The first liquid crystal cell and the second liquid crystal cell are stacked. Each of the first liquid crystal cell and the second liquid crystal cell includes a first substrate on which a first transparent electrode and a second transparent electrode are alternately and repeatedly arranged in a first direction, a second substrate on which a third transparent electrode and a fourth transparent electrode are alternately and repeatedly arranged in a second direction intersecting the first direction, and a liquid crystal layer between the first substrate and the second substrate. The second substrate of the first liquid crystal cell and the first substrate of the second liquid crystal cell are adjacent to each other.Type: GrantFiled: August 8, 2023Date of Patent: November 12, 2024Assignee: Japan Display Inc.Inventors: Tae Kurokawa, Takeo Koito, Kojiro Ikeda
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Patent number: 12142072Abstract: According to an aspect, a detection device includes: a substrate; a plurality of photodiodes provided to the substrate and arranged in a first direction; a plurality of lenses provided so as to overlap the photodiodes; and a light-blocking layer provided between the photodiodes and the lenses and having a plurality of openings. More than one of the openings is provided in each of regions overlapping the respective photodiodes, and an arrangement direction of the openings in each of the regions overlapping the respective photodiodes is at an angle to the first direction.Type: GrantFiled: July 6, 2023Date of Patent: November 12, 2024Assignee: Japan Display Inc.Inventors: Keiji Tago, Kimitoshi Ohgiichi, Satoru Kawasaki
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Patent number: 12142600Abstract: According to one embodiment, a display panel includes a substrate, a first insulating layer, a second insulating layer, and pixels including subpixels of colors. Each of the subpixels includes a drive transistor, a conductive layer, a pixel electrode receiving a signal having a controlled current value from the drive transistor via the conductive layer, and a light-emitting element. Each of the pixels has a mounting electrode overlaid on the conductive layer in each of the subpixels. In a first pixel of the pixels, the mounting electrode is in an electrically floating state.Type: GrantFiled: May 26, 2021Date of Patent: November 12, 2024Assignee: Japan Display Inc.Inventors: Yasuhiro Kanaya, Masanobu Ikeda
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Patent number: 12142236Abstract: According to one embodiment, a liquid crystal display device with an optical sensor includes a display panel and a driver IC. The display panel includes first to third signal lines, an optical sensor including a photoelectric conversion element, and a sensor signal line that is connected to the optical sensor and transmits a detection signal to the driver IC. One first wiring line drawn from one terminal of the driver IC is connected to four switching elements. Three of the four switching elements are electrically connected to one of the first to third signal lines, respectively. One of the four switching elements, different from the three switching elements, is electrically connected to the sensor signal line.Type: GrantFiled: August 28, 2023Date of Patent: November 12, 2024Assignee: Japan Display Inc.Inventors: Hiroyuki Abe, Akihiko Saitoh, Teppei Yamada
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Patent number: 12144202Abstract: According to one embodiment, in a manufacturing method of a display device, a first lower electrode, a second lower electrode and a third lower electrode are formed. A rib having first aperture overlapping the first lower electrode, a second aperture overlapping the second lower electrode, and a third aperture overlapping the third lower electrode is formed. A first thin film including a first light emitting layer is formed on the first lower electrode. A second thin film including a second light emitting layer is formed on the second lower electrode. An area of the first aperture is larger than an area of the second aperture.Type: GrantFiled: August 2, 2023Date of Patent: November 12, 2024Assignee: JAPAN DISPLAY INC.Inventors: Yuko Matsumoto, Kaichi Fukuda
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Patent number: 12144240Abstract: In a display device including a flexible display panel, the risk of disconnection of a wiring due to bending is reduced. A display panel includes a display function layer including display elements and a wiring on one major surface of a base material having flexibility. The display panel includes, on the one major surface of the base material, an organic-film-covered wiring area where the surface of the wiring is covered with an organic planarization film that is an organic insulating film in direct contact with the wiring. The display panel includes, in the plane thereof, a display area where the display elements are arranged and a component mounting area that is a peripheral area located outside the display area. As the organic-film-covered wiring area, a curved area is provided in the peripheral area.Type: GrantFiled: November 21, 2023Date of Patent: November 12, 2024Assignee: Japan Display Inc.Inventor: Masumi Nishimura
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Patent number: 12140837Abstract: A liquid crystal light control device includes a first liquid crystal cell, a second liquid crystal cell overlapping the first liquid crystal cell, a third liquid crystal cell overlapping the second liquid crystal cell, and a fourth liquid crystal cell overlapping the third liquid crystal cell. Each of the first, second, third, and the fourth liquid crystal cells includes, a first substrate including a first alignment film, a second substrate including an electrode having a strip pattern and a second alignment film, and a liquid crystal layer between the first substrate and the second substrate. An alignment direction of the first alignment film and an alignment direction of the second alignment film are aligned to intersect each other. A longitudinal direction of the strip pattern of the electrode having the strip pattern is arranged to intersect an alignment direction of the second alignment film.Type: GrantFiled: September 15, 2023Date of Patent: November 12, 2024Assignee: Japan Display Inc.Inventors: Kojiro Ikeda, Takeo Koito, Tae Kurokawa
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Publication number: 20240372055Abstract: A display device includes a substrate having a first surface and a second surface opposite the first surface, a first chip arranged on the first surface and having a first terminal forming surface on which a first terminal is arranged on an opposite side to a first mounting surface in contact with the first surface, and a second chip arranged on the first surface, having a second terminal forming surface on which a second terminal is arranged on an opposite side of a second mounting surface in contact with the first surface, and having a different thickness from the first chip, wherein an upper surface of the first terminal and an upper surface of the second terminal are located on a same surface parallel to the second surface.Type: ApplicationFiled: July 16, 2024Publication date: November 7, 2024Applicant: Japan Display Inc.Inventors: Yoichi KAMIJO, Yoshikatsu IMAZEKI, Koichi MIYASAKA, Shuichi OSAWA, Yoshifumi KAMEI
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Publication number: 20240369889Abstract: A liquid crystal display device includes a thin film transistor (TFT) substrate and a counter substrate that are disposed opposite to each other with a liquid crystal layer in between. The TFT substrate has, an organic passivation film formed covering the TFT, and a pixel electrode and a common electrode formed on the organic passivation film, the organic passivation film having a through-hole to connect the pixel electrode and the TFT. A columnar spacer is formed on the counter substrate to define a distance between the TFT substrate and the counter substrate. A planarization film made of resin is formed in the through-hole. A recess is formed in the through-hole by a surface of the planarization film and a sidewall of the through-hole. A tip end of the columnar spacer exists in the recess.Type: ApplicationFiled: July 15, 2024Publication date: November 7, 2024Applicant: Japan Display Inc.Inventors: Tomokazu ISHIKAWA, Masaru NAKAKOMI
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Publication number: 20240373724Abstract: A light emitting device includes a substrate, a partition wall defining a plurality of pixels in a matrix over the substrate, a reflective layer covering the partition wall, and an insulating layer covering the reflective layer. Each of the plurality of pixels arranged in a matrix includes a conductive alignment layer over the substrate, a semiconductor layer containing gallium nitride over the conductive alignment layer, a light emitting layer over the semiconductor layer, and an electrode layer over the light emitting layer. A distance from an upper surface of the substrate to an upper surface of the reflective layer in a region overlapping the partition wall is greater than a distance from the upper surface of the substrate to an upper surface of the light emitting layer in a region not overlapping the partition wall.Type: ApplicationFiled: July 16, 2024Publication date: November 7, 2024Applicant: Japan Display Inc.Inventor: Masumi NISHIMURA
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Publication number: 20240373681Abstract: According to one embodiment, a manufacturing method for a display device includes forming a plurality of lower electrodes, a rib, a partition, a first stacked film including a first organic layer and a first upper electrode, and a first sealing layer. The manufacturing method includes forming a resist individually for each of a plurality of first sub-pixels aligned in a second direction. The manufacturing method includes removing the first sealing layer and the first stacked film using the resists as a mask.Type: ApplicationFiled: April 29, 2024Publication date: November 7, 2024Applicant: Japan Display Inc.Inventor: Hiroshi TABATAKE
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Publication number: 20240369891Abstract: A display device including: a substrate; a first thin film transistor of polysilicon semiconductor, a second thin film transistor of oxide semiconductor; a first light shading film opposing to the polysilicon semiconductor, and a second light shading film opposing to the oxide semiconductor; a first insulating film, a second insulating film which is constituted from plural insulating films, and a third insulating film superposed in this order; a first through hole penetrating the second insulating film and not penetrating the first insulating film and the third insulating film; a second through hole penetrating the first insulating film and the third insulating film; the first light shading film connects with a first conductive component, a part of the first conductive component exists on the third insulating film, through the second through hole.Type: ApplicationFiled: July 19, 2024Publication date: November 7, 2024Applicant: Japan Display Inc.Inventors: Akihiro HANADA, Toshihide JINNAI, Isao SUZUMURA, Hajime WATAKABE, Ryo ONODERA
