Patents Assigned to Sharp Display Technology Corporation
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Patent number: 12105392Abstract: 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: GrantFiled: November 1, 2023Date of Patent: October 1, 2024Assignee: Sharp Display Technology CorporationInventors: Takahiro Koshiba, Hiroto Akiyama
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Patent number: 12099229Abstract: 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: GrantFiled: February 22, 2023Date of Patent: September 24, 2024Assignee: Sharp Display Technology CorporationInventors: Shugo Yagi, Junichi Masuda, Yuuichi Kanbayashi, Satoshi Tsubooka
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Patent number: 12100358Abstract: 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: GrantFiled: November 8, 2023Date of Patent: September 24, 2024Assignee: Sharp Display Technology CorporationInventors: Seiya Kawamorita, Satoshi Horiuchi, Yasuaki Iwase
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Patent number: 12086356Abstract: 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: GrantFiled: January 3, 2023Date of Patent: September 10, 2024Assignee: Sharp Display Technology CorporationInventors: Takuya Henmi, Satoshi Sekido, Keisuke Kanda, Yuhji Satoh
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Patent number: 12078878Abstract: 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: GrantFiled: January 18, 2024Date of Patent: September 3, 2024Assignee: Sharp Display Technology CorporationInventors: Koji Murata, Akira Hirai, Takashi Satoh, Akira Sakai, Kiyoshi Minoura
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Patent number: 12073803Abstract: A display device includes: a first liquid crystal panel; a second liquid crystal panel disposed on a back face of the first liquid crystal panel; and a controller, wherein the controller determines, based on a maximum value of a target pixel value of the display device and a surrounding pixel value of the display device and a minimum value of the target pixel value and the surrounding pixel value, a value of a gray scale of a target pixel of the second liquid crystal panel with reference to at least one of a plurality of conversion characteristics indicating characteristics different from each other as characteristics configured to convert the target pixel value into the value of the gray scale of the target pixel of the second liquid crystal panel.Type: GrantFiled: February 16, 2023Date of Patent: August 27, 2024Assignee: Sharp Display Technology CorporationInventors: Tatsunori Nakamura, Takayuki Murai
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Patent number: 12066716Abstract: An electronic device includes a first display panel including a first display surface, and a second display panel including a second display surface and configured to be disposed such that light emitted from the first display surface is incident on the second display surface. The first display panel is configured such that light emitted from the first display surface and incident on the second display surface includes a large amount of P-polarization components. The second display panel is a reflection-type display panel, and includes a polarizer disposed on the second display surface and configured to absorb S-polarization components of incident light.Type: GrantFiled: March 27, 2023Date of Patent: August 20, 2024Assignee: Sharp Display Technology CorporationInventors: Naru Usukura, Akiko Itoh, Koji Murata, Keisuke Yoshida
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Patent number: 12066701Abstract: A display device includes a display panel and a control unit. The display panel includes a first substrate, a light modulation layer configured to switch between transmissive display and non-transmissive display, and a second substrate in this order, and further includes an optical sensor configured to detect a luminance of light incident from a first space located on one main surface side of the display panel and from a second space located on the other main surface side of the display panel. The control unit calculates, based on the luminance, a relationship between brightness of the first space and brightness of the second space as a numerical value and switches display of the light modulation layer based on the numerical value.Type: GrantFiled: July 31, 2023Date of Patent: August 20, 2024Assignee: Sharp Display Technology CorporationInventors: Chiaki Minari, Naru Usukura, Ryuzo Yuki
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Patent number: 12057085Abstract: A set circuit in a unit circuit in a gate driver of a display device includes a setting transistor, a first auxiliary transistor, and a second auxiliary transistor. The setting transistor includes a source terminal connected to an internal node, a gate terminal connected to a set input terminal, and a drain terminal connected to the set input terminal via the first auxiliary transistor and also connected to an input terminal via the second auxiliary transistor in a diode-connected form. Each transistor is controlled to be in an on state and an off state during normal drive and is controlled to be in the off state and the on state during a pause period by a control signal supplied to the input terminal.Type: GrantFiled: August 14, 2023Date of Patent: August 6, 2024Assignee: Sharp Display Technology CorporationInventors: Jun Nishimura, Kengo Hara, Yohei Takeuchi, Yoshihito Hara, Tohru Daitoh
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Patent number: 12046215Abstract: A display device includes a plurality of pixels, a plurality of scanning signal lines, a plurality of data signal lines, a source driver configured to supply a data signal to the plurality of pixels via a corresponding data signal line of the plurality of data signal lines, and a spare wiring line configured to connect to a disconnected data signal line. For each data signal output to a data signal line with disconnection corrected by the spare wiring line, the source driver sets an output delay amount according to a disconnection position and a line position of a pixel to be supplied with the data signal.Type: GrantFiled: August 1, 2023Date of Patent: July 23, 2024Assignee: Sharp Display Technology CorporationInventor: Junichi Sawahata
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Patent number: 12038657Abstract: A liquid crystal panel includes an active matrix substrate including a gate driver circuit, a demultiplexer circuit, and a gate switch circuit. The active matrix substrate includes a non-display region and a testing terminal region located outside the non-display region, has first and second in-panel testing terminals in the non-display region, and has first and second out-panel testing terminals in the testing terminal region. The second out-panel testing terminal is connected to the gate driver circuit. The first out-panel testing terminal is connected to the demultiplexer circuit. The second in-panel testing terminal is connected to the gate switch circuit. The first in-panel testing terminal is connected to the demultiplexer circuit.Type: GrantFiled: November 10, 2023Date of Patent: July 16, 2024Assignee: Sharp Display Technology CorporationInventors: Isao Takahashi, Yohsuke Fujikawa, Takuya Hachida, Shun Iinuma
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Patent number: 12026334Abstract: A touch panel display driver includes a source driver circuit, a touch detection circuit, a selector circuit, a register a plurality of source terminals, a plurality of touch detection terminals, and a plurality of selection terminals. The selector circuit electrically connects the source driver circuit to each of the source terminals, electrically connects the touch detection circuit to each of the touch detection terminals, and electrically connects each of the selection terminals to the source driver circuit or the touch detection circuit.Type: GrantFiled: April 14, 2023Date of Patent: July 2, 2024Assignee: Sharp Display Technology CorporationInventors: Daisuke Suehiro, Daiji Kitagawa, Noriyuki Tanaka, Tatsuhiko Suyama, Jin Miyazawa, Yousuke Nakamura
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Patent number: 12025893Abstract: A display device includes an array substrate, a counter substrate, a first pixel electrode, a second pixel electrode spaced apart from the first pixel electrode in a first direction, a third pixel electrode spaced apart from the second pixel electrode in the first direction, a first wiring line positioned between the first pixel electrode and the second pixel electrode and extending in a second direction intersecting the first direction, a second pixel electrode row including the second pixel electrode and composed of a plurality of pixel electrodes aligned in the second direction, a third pixel electrode row including the third pixel electrode and composed of a plurality of pixel electrodes aligned in the second direction, a first insulating film disposed on a lower-layer side of the first wiring line, and a spacer protruding from the counter substrate toward the array substrate.Type: GrantFiled: March 3, 2023Date of Patent: July 2, 2024Assignee: Sharp Display Technology CorporationInventors: Hikaru Yoshino, Junichi Morinaga
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Patent number: 12021086Abstract: An active matrix substrate includes a substrate and a plurality of pixels located on the substrate. Each of the pixels includes an oxide semiconductor layer, a first insulator covering the oxide semiconductor layer, a first contact hole located at the first insulator, a first extraction electrode located on the first insulator and in the first contact hole, and connected to the oxide semiconductor layer, a second insulator covering the first extraction electrode, a second contact hole located at the second insulator, a second extraction electrode located on the second insulator and in the second contact hole, and connected to the first extraction electrode, and a pixel electrode connected to the second extraction electrode. The first and second extraction electrodes are light-transmissive, and a portion of a side surface of at least one of the first and second contact holes is not covered with the first and second extraction electrodes.Type: GrantFiled: August 25, 2023Date of Patent: June 25, 2024Assignee: Sharp Display Technology CorporationInventors: Kuniaki Okada, Shinpei Higashida
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Patent number: 12013997Abstract: An in-cell touch panel includes a touch electrode, a shielding layer that is conductive and that is disposed between the touch electrode and the touch surface, a conductive layer that is electrically connected to the shielding layer, and a conductive member and a wiring portion that connect the conductive layer to a reference potential. At least part of the shielding layer is disposed so as to overlap a touch detection region. At least part of the conductive layer is disposed so as to overlap a frame region. A sheet resistance value of the conductive layer is lower than a sheet resistance value of the shielding layer.Type: GrantFiled: July 25, 2023Date of Patent: June 18, 2024Assignee: Sharp Display Technology CorporationInventor: Haruhito Kagawa
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Publication number: 20240168327Abstract: A liquid crystal display device includes a first substrate, a second substrate disposed more to a viewer side than the first substrate, and a liquid crystal layer provided between the first substrate and the second substrate, with a plurality of pixels being arrayed in a matrix shape. Each pixel includes a reflective region for display in a reflection mode. The first substrate includes a thin film transistor provided corresponding to each pixel, a pixel electrode electrically connected to the thin film transistor, and a reflective layer located at least in the reflective region. The first substrate further includes a common electrode adjacent to the pixel electrode with a dielectric layer interposed between the pixel electrode and the common electrode. At least one from among the pixel electrode and the common electrode includes at least one slit.Type: ApplicationFiled: October 11, 2023Publication date: May 23, 2024Applicant: Sharp Display Technology CorporationInventors: Fumikazu SHIMOSHIKIRYOH, Shinichi TERASHITA, Kouichi WATANABE
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Publication number: 20240168282Abstract: An optical system includes, in order from a pupil surface side to a display surface side, a first reflective polarizing plate, a first lens having a positive refractive power, a half mirror, a second lens having a positive refractive power, and a second reflective polarizing plate. The optical system further includes a first quarter wave plate arranged between a pupil surface and the half mirror, and a second quarter wave plate arranged between the half mirror and a display surface. The second lens has a paraxially convex surface on the pupil surface side. Further, in the case where a paraxial curvature radius of a surface of the first lens on the pupil surface side is r1 and a paraxial curvature radius of a surface of the first lens on the display surface side is r2, the optical system satisfies a conditional expression below: (1) ?3.2<r1/r2<?0.9.Type: ApplicationFiled: October 31, 2023Publication date: May 23, 2024Applicants: Kantatsu Co., Ltd, Sharp Display Technology CorporationInventors: Ryo Maruyama, Naru Usukura
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Patent number: 11988910Abstract: A viewing angle-controlling liquid crystal panel sequentially includes a first polarizing plate; a first liquid crystal panel; a second polarizing plate; a second liquid crystal panel; and a third polarizing plate, wherein an azimuthal angle ?P1 of the absorption axis of the first polarizing plate, an azimuthal angle ?1 of a director of liquid crystal molecules near the first substrate and an azimuthal angle ?2 of a director of liquid crystal molecules near the second substrate in the first liquid crystal panel, an azimuthal angle ?P2 of the absorption axis of the second polarizing plate, an azimuthal angle ?3 of a director of liquid crystal molecules near the third substrate and an azimuthal angle ?4 of a director of liquid crystal molecules near the fourth substrate in the second liquid crystal panel, and an azimuthal angle ?P3 of the absorption axis of the third polarizing plate satisfy specific formulas.Type: GrantFiled: October 12, 2023Date of Patent: May 21, 2024Assignee: Sharp Display Technology CorporationInventors: Koji Murata, Junichi Masuda, Shugo Yagi, Akira Hirai, Hiroshi Tsuchiya, Takashi Satoh, Akira Sakai, Kiyoshi Minoura
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Patent number: 11988918Abstract: Provided is an optical element including a phase difference layer. The phase difference layer is a laminate of n first phase difference layers and m second phase difference layers. The n first phase difference layers each contain first anisotropic molecules with tilt angles different between a viewing surface side and a back surface side. The m second phase difference layers each contain second anisotropic molecules with tilt angles different between a viewing surface side and a back surface side. Slow axes of the n first phase difference layers are in a same orientation. Slow axes of the m second phase difference layers are in a same orientation. The slow axes of the n first phase difference layers and the slow axes of the m second phase difference layers are anti-parallel to each other and are parallel to or perpendicular to the transmission axis of the first polarizer.Type: GrantFiled: October 20, 2023Date of Patent: May 21, 2024Assignee: Sharp Display Technology CorporationInventors: Yuichi Kawahira, Masahiro Hasegawa, Ryosuke Saigusa, Jianeng Xu, Akira Sakai
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Publication number: 20240160052Abstract: A viewing angle-controlling liquid crystal panel sequentially includes a first polarizing plate; a first liquid crystal panel; a second polarizing plate; a second liquid crystal panel; and a third polarizing plate, wherein an azimuthal angle ?P1 of the absorption axis of the first polarizing plate, an azimuthal angle ?1 of a director of liquid crystal molecules near the first substrate and an azimuthal angle ?2 of a director of liquid crystal molecules near the second substrate in the first liquid crystal panel, an azimuthal angle ?P2 of the absorption axis of the second polarizing plate, an azimuthal angle ?3 of a director of liquid crystal molecules near the third substrate and an azimuthal angle ?4 of a director of liquid crystal molecules near the fourth substrate in the second liquid crystal panel, and an azimuthal angle ?P3 of the absorption axis of the third polarizing plate satisfy specific formulas.Type: ApplicationFiled: October 12, 2023Publication date: May 16, 2024Applicant: Sharp Display Technology CorporationInventors: Koji MURATA, Junichi MASUDA, Shugo YAGI, Akira HIRAI, Hiroshi TSUCHIYA, Takashi SATOH, Akira SAKAI, Kiyoshi MINOURA