Patents Assigned to Sharp Display Technology Corporation
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Patent number: 11825672Abstract: A quantum dot light-emitting apparatus includes a substrate, with a first electrode layer located on the substrate. An emissive layer having a first set of quantum dots is electrically coupled with the first electrode layer, and a second electrode layer is also electrically coupled with the emissive layer. The second electrode layer is located opposite the first electrode layer, relative to the emissive layer. A first charge transport layer is placed between the emissive layer and the first electrode layer, and a second charge transport layer is placed between the emissive layer and the second electrode layer. At least one of the first charge transport layer and the second charge transport layer includes a second set of quantum dots.Type: GrantFiled: August 18, 2021Date of Patent: November 21, 2023Assignee: Sharp Display Technology CorporationInventors: Andrea Zampetti, Valerie Berryman-Bousquet
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Patent number: 11822181Abstract: Provided is a liquid crystal display device sequentially including: a first polarizer; a liquid crystal panel; a second polarizer; a biaxial retarder; a third polarizer; and a backlight including a light source and a prism sheet disposed closer to the viewing surface side than the light source is. The prism sheet includes prisms arranged in multiple columns on a surface close to the viewing surface side. The liquid crystal display has a light diffusion property curve having no side lobe or having a side lobe satisfying a ratio of a local maximum luminance to a local minimum luminance of 1.35 or less, the light diffusion property curve being obtained by plotting a luminance in a white display state in a direction perpendicular to ridge lines of the prisms against a polar angle.Type: GrantFiled: May 10, 2023Date of Patent: November 21, 2023Assignee: Sharp Display Technology CorporationInventors: Yuichi Kawahira, Masahiro Hasegawa, Ryosuke Saigusa, Akira Sakai
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Patent number: 11823611Abstract: A display device includes a display control circuit. The display control circuit includes: an arithmetic unit obtaining a video signal, and calculating, in accordance with the video signal, an average voltage value of a source signal in a display period; and a controller and a signal synthesizer supplying, in the display period, a source signal, based on the video signal, from a source drive circuit to a plurality of source lines, and supplying, in a suspension period, a source signal, having the average voltage value, from a source drive circuit to each of the source lines.Type: GrantFiled: April 11, 2022Date of Patent: November 21, 2023Assignee: SHARP DISPLAY TECHNOLOGY CORPORATIONInventor: Akira Shibazaki
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Patent number: 11817459Abstract: Each thin film transistor of an active matrix substrate includes an oxide semiconductor layer, a gate electrode disposed closer to the substrate side of the oxide semiconductor layer, a gate insulating layer, a source electrode, and a drain electrode, wherein the oxide semiconductor layer includes a layered structure including a first layer and a second layer disposed on a part of the first layer and extending across the first layer in a channel width direction when viewed in a normal direction of the substrate, the first layer includes an overlapping portion overlapping with the second layer, and a first portion and a second portion each located on a corresponding one of both sides of the second layer, when viewed in a normal direction of the substrate, the second layer covers an upper surface and a side surface of the overlapping portion of the first layer, the source electrode is electrically connected to at least a part of an upper surface of the first portion, and the drain electrode is electrically connType: GrantFiled: June 29, 2022Date of Patent: November 14, 2023Assignee: SHARP DISPLAY TECHNOLOGY CORPORATIONInventor: Katsunori Misaki
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Publication number: 20230350250Abstract: A liquid crystal display device includes a first substrate, a second substrate, and a liquid crystal layer. Each pixel includes a reflection region and a transmission region. The first substrate includes a reflecting layer, a first insulating layer, and a pixel electrode. The thickness of the liquid crystal layer in the transmission region is greater than the thickness of the liquid crystal layer in the reflection region, and the liquid crystal layer has a twist angle of substantially 0 degree. A surface of the first substrate that faces the liquid crystal layer includes an upper step portion, a lower step portion, and an inclined portion. The length L1 of a portion of the inclined portion included in the reflection region and the length L2 of a portion of the lower step portion included in the reflection region satisfy the relationship L1+L2?1.81·L1.Type: ApplicationFiled: April 27, 2023Publication date: November 2, 2023Applicant: Sharp Display Technology CorporationInventors: Hiroyuki HAKOI, Takashi SATOH
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Publication number: 20230333679Abstract: 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: ApplicationFiled: April 14, 2023Publication date: October 19, 2023Applicant: Sharp Display Technology CorporationInventors: Daisuke SUEHIRO, Daiji KITAGAWA, Noriyuki TANAKA, Tatsuhiko SUYAMA, Jin MIYAZAWA, Yousuke NAKAMURA
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Patent number: 11789312Abstract: According to an aspect of the disclosure, a lighting device includes: a plurality of light sources; and a plurality of optical sheets disposed to be stacked at a position away from the plurality of light sources. The plurality of optical sheets include a first optical sheet and a second optical sheet. Each of the first optical sheet and the second optical sheet has a unit region that modulates light emitted from a light source for each of the plurality of light sources. The unit region includes a modulation region including a light source region facing the light source, and having a relatively high modulation action of the light as compared with other regions.Type: GrantFiled: November 15, 2022Date of Patent: October 17, 2023Assignee: Sharp Display Technology CorporationInventors: Hirotoshi Yasunaga, Hisashi Watanabe, Takeshi Masuda
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Patent number: 11789325Abstract: A liquid crystal display apparatus includes an active matrix substrate, a counter substrate opposing the active matrix substrate, a liquid crystal layer provided between the active matrix substrate and the counter substrate, and a sealing portion that surrounds the liquid crystal layer. The active matrix substrate includes a first substrate and a first transparent conductive layer. The counter substrate includes a second substrate and a second transparent conductive layer. The active matrix substrate further includes a capacitance element that is disposed at an outer side of the sealing portion or disposed at least partially overlapping with the sealing portion. One of the active matrix substrate and the counter substrate further includes a projection structure. A section of the second transparent conductive layer present at an outer side of the sealing portion is in contact with the first transparent conductive layer on a top face of the projection structure.Type: GrantFiled: February 28, 2023Date of Patent: October 17, 2023Assignee: Sharp Display Technology CorporationInventor: Kikuko Azuma
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Patent number: 11789311Abstract: An illumination device includes a light source, a wavelength conversion sheet configured to perform wavelength conversion on light from the light source, and a first light reduction portion disposed in a frame shape as a whole overlapping an outer peripheral portion of the wavelength conversion sheet in a plan view between the light source and the wavelength conversion sheet, and configured to reduce a light amount of incident light.Type: GrantFiled: March 9, 2022Date of Patent: October 17, 2023Assignee: Sharp Display Technology CorporationInventors: Takeshi Masuda, Hisashi Watanabe, Hirotoshi Yasunaga
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Patent number: 11774813Abstract: Provided are a liquid crystal display device that can increase light use efficiency and reduce external light reflection, and a method of producing the liquid crystal display device. The liquid crystal display device sequentially includes, from a back surface side toward a viewing surface side: a first substrate; a liquid crystal layer; and a second substrate, the liquid crystal display device including sub-pixels each including an optical opening allowing light to pass through, the first substrate sequentially including, from the back surface side toward the viewing surface side: a supporting substrate; a metal layer surrounding the optical openings; and a resist layer being superimposed with the metal layer and being in contact with the metal layer, an end of the resist layer being superimposed with an end of the metal layer and having a taper angle ? of 40° or more.Type: GrantFiled: December 9, 2022Date of Patent: October 3, 2023Assignee: Sharp Display Technology CorporationInventors: Yuichi Kawahira, Akira Hirai, Akira Sakai
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Patent number: 11774819Abstract: An active matrix substrate includes, in each pixel region, a pixel TFT of an oxide semiconductor layer having source and drain regions, a first insulating layer disposed on top of the oxide semiconductor layer, an extraction electrode, disposed on top of the first insulating layer, that includes a transparent conductive film, and a pixel electrode connected to the extraction electrode. The first insulating layer includes first and second contact holes located above the source and drain regions, respectively. Part of a source bus line overlaps part of the source region and is connected to the source region via the first contact hole. The extraction electrode is connected to the drain region via the second contact hole. Shapes of bottoms of the first and second contact holes are different from each other, and the shape of the bottom of the second contact hole includes two orthogonal sides.Type: GrantFiled: January 11, 2023Date of Patent: October 3, 2023Assignee: Sharp Display Technology CorporationInventors: Tadayoshi Miyamoto, Yoshitaka Koyama, Yoshinobu Nakamura, Toshihiro Kaneko
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Patent number: 11776500Abstract: Multiple adjustment capacitors corresponding to multiple source bus lines on a one-to-one correspondence basis are arranged. Each adjustment capacitor includes a first electrode supplied with an adjustment signal and a second electrode connected to the source bus line. The adjustment capacitors are divided into multiple groups. An adjustment signal having a amplitude different from group to group is supplied to the adjustment capacitor. A potential of the adjustment signal is raised after a liquid-crystal capacitor is charged in a pixel formation region including a thin-film transistor (TFT) that is turned on with a gate driver causing a scanning signal to rise and before the gate driver causes the scanning signal to fall.Type: GrantFiled: September 2, 2022Date of Patent: October 3, 2023Assignee: SHARP DISPLAY TECHNOLOGY CORPORATIONInventor: Osamu Sasaki
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Patent number: 11769459Abstract: A display device includes a control circuit. By setting an intermediate point between a start point and an end point of a lighting period as a start point of the lighting cycle, and setting an intermediate point between a start point and an end point of a lighting period of the next lighting period as an end point of the lighting cycle, the control circuit controls a backlight such that an absolute value of a difference value between a first ratio of a sum of a length of a first lighting period in the first lighting cycle and a length of the next second lighting period in the first lighting cycle to a length of the first lighting cycle and the target duty ratio is 0.1 or less.Type: GrantFiled: December 9, 2022Date of Patent: September 26, 2023Assignee: Sharp Display Technology CorporationInventors: Koki Oka, Kohichi Ohhara
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Publication number: 20230296932Abstract: Provided is a display device including a backlight; a first liquid crystal panel; a display panel; and a second liquid crystal panel. The first liquid crystal panel includes a first substrate, a first liquid crystal layer containing first liquid crystal molecules, and a second substrate. The second liquid crystal panel includes a third substrate, a second liquid crystal layer containing second liquid crystal molecules, and a fourth substrate. The display device satisfies the following Formula (1): |?3??1|?50°??Formula (1) wherein ?1 represents an azimuthal angle of a director of the first liquid crystal molecules near the first substrate with no voltage applied to the first liquid crystal layer, and ?3 represents an azimuthal angle of a director of the second liquid crystal molecules near the third substrate with no voltage applied to the second liquid crystal layer.Type: ApplicationFiled: March 17, 2023Publication date: September 21, 2023Applicant: Sharp Display Technology CorporationInventors: Koji MURATA, Hiroshi TSUCHIYA, Atsuko KANASHIMA, Takashi SATOH, Shinji SHIMADA
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Patent number: 11762253Abstract: An active matrix substrate includes first lines, a second line, third lines, a first connection electrode, and a second connection electrode. The first lines extend along a first direction and are arranged in a second direction and are portions of a first conductive film. The second line extends along the second direction and cross the first lines and is a portion of a second conductive film. The third lines extend along the second direction and overlap the second line and sandwich one first line and are portions of the first conductive film that differ from the portions configured as the first lines. The first connection electrode crosses the one first line and a second insulating film and is connected to the third lines sandwiching the one first line. The second connection electrode crosses another first line and is connected to the second line and one of the third lines.Type: GrantFiled: October 5, 2022Date of Patent: September 19, 2023Assignee: SHARP DISPLAY TECHNOLOGY CORPORATIONInventor: Masahiro Yoshida
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Patent number: 11754728Abstract: An X-ray imaging apparatus includes an X-ray source, an X-ray imaging panel, and a controller. The controller includes an image processing unit that generates an inspection image in accordance with a data signal read from a thin-film transistor with the thin-film transistor supplied with a gate signal, a detection control unit that detects a dark-spot pixel from the inspection image, and a threshold correction unit that applies, to a gate of the thin-film transistor corresponding to the dark-spot pixel, a positive shift voltage that raises a gate-off threshold voltage of the thin-film transistor.Type: GrantFiled: June 2, 2022Date of Patent: September 12, 2023Assignee: SHARP DISPLAY TECHNOLOGY CORPORATIONInventors: Kohzoh Takahashi, Akinori Kubota
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Patent number: 11749219Abstract: A signal obtained through sampling a gate start pulse signal GSP by using one of a plurality of gate clock signals is supplied as a shift pulse for a forward shift action (a forward shift start pulse signal) to the first stage of a plurality of stages constituting a bidirectional shift register, and a signal obtained through sampling the gate start pulse signal GSP by using another one of the plurality of gate clock signals is supplied as a shift pulse for a backward shift action (a backward shift start pulse signal) to the last stage of the plurality of stages constituting the bidirectional shift register.Type: GrantFiled: December 1, 2021Date of Patent: September 5, 2023Assignee: Sharp Display Technology CorporationInventors: Yasushi Sasaki, Shige Furuta, Yuhichiroh Murakami, Hidekazu Yamanaka, Hiroyuki Adachi
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Patent number: 11749170Abstract: A display device according to aspect of the disclosure includes: a source driver; and a timing controller. The source driver and the timing controller perform data communication through serial transmission. The display device further includes a storage unit configured to store information about each of a plurality of standards that are different from each other, the standard defining a protocol for specific serial transmission. The timing controller selects one standard from among the plurality of standards, performs first determination that is determination on the selected standard to determine whether to receive a lock signal from the source driver within a predetermined period after training pattern data compatible with the selected standard is output to the source driver, and outputs an image signal of the protocol of the selected standard to the source driver when a result of the first determination is positive.Type: GrantFiled: December 13, 2022Date of Patent: September 5, 2023Assignee: Sharp Display Technology CorporationInventor: Junichi Sawahata
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Patent number: 11749225Abstract: A unit circuit constituting each stage of a shift register serving as a gate driver of a display device charges an internal node to an H level via a transistor T2 when an output signal G(n?4) of a preceding stage turns to the H level and sets the internal node to an L level via a transistor T3 when an output signal G(n+8) of a succeeding stage turns to the H level. Each of the unit circuits of last eight stages in the gate driver is provided with a transistor T4 including a gate terminal to which the signal G(n?4) is applied and a drain terminal connected to the internal node. A signal is applied to a source terminal of the transistor T4, the signal being at the H level during a period when the internal node of any of the last eight stages is to be set to the H level, and being the L level during the other periods. This suppresses a voltage fluctuation generated in the internal node when a stabilization circuit does not normally function.Type: GrantFiled: October 24, 2022Date of Patent: September 5, 2023Assignee: SHARP DISPLAY TECHNOLOGY CORPORATIONInventor: Yi-Cheng Tsai
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Patent number: 11740524Abstract: A liquid crystal display device includes an active matrix substrate, a counter substrate, a liquid crystal layer, and a sealing portion. The active matrix substrate includes a substrate, a gate wiring line drive circuit monolithically formed on the substrate, a capacitance element supported by the substrate and provided at least partially overlapping the sealing portion when viewed from a direction normal to a display surface, the capacitance element including a first capacitance electrode, a second capacitance electrode disposed opposite the first capacitance electrode and between the first capacitance electrode and the sealing portion, and a dielectric layer located between the first capacitance electrode and the second capacitance electrode, and a transparent electrode formed of a transparent conductive material, disposed between the capacitance element and the sealing portion, and electrically connected to the second capacitance electrode.Type: GrantFiled: November 9, 2022Date of Patent: August 29, 2023Assignee: Sharp Display Technology CorporationInventors: Tatsuya Nakamoto, Takashi Nakao, Nobuyoshi Nagashima, Hidetoshi Nakagawa