Patents Assigned to Sharp Display Technology Corporation
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Patent number: 11740525Abstract: A first pixel electrode and a third pixel electrode are disposed on one side of one of a plurality of column lines. A second pixel electrode and a fourth pixel electrode are disposed on another side of the one of the plurality of column lines. A third switching element is disposed on the one side of the one of the plurality of column lines. A fourth switching element is disposed on the other side of the one of the plurality of column lines. The first pixel electrode is connected to a first switching element via a first connection electrode. The second pixel electrode is connected to a second switching element via a second connection electrode. The third pixel electrode is connected to the third switching element. The fourth pixel electrode is connected to the fourth switching element.Type: GrantFiled: December 9, 2022Date of Patent: August 29, 2023Assignee: Sharp Display Technology CorporationInventor: Masakatsu Tominaga
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Patent number: 11726361Abstract: An in-cell touch panel includes a mode switching control circuit and a counter substrate electrode control circuit. The mode switching control circuit switches, in a time-division manner, the operation mode of the in-cell touch panel between a display mode in which a display signal is supplied by a display control circuit to pixel electrodes, and a touch detection mode in which a driving signal is supplied by a driving control circuit to touch sensor electrodes. The counter substrate electrode control circuit supplies a counter substrate electrode with a signal that is in synchronization with the driving signal and that has the same polarity as that of the driving signal in a period while the in-cell touch panel is in the touch detection mode, or causes the potential of the counter substrate electrode to be in a floating state in a period while the in-cell touch panel is in the touch detection mode.Type: GrantFiled: August 12, 2022Date of Patent: August 15, 2023Assignee: SHARP DISPLAY TECHNOLOGY CORPORATIONInventors: Kosuke Nagata, Kazutoshi Kida, Daiji Kitagawa
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Publication number: 20230244101Abstract: A display device includes an organic EL element layer, a liquid crystal element layer disposed on top of the organic EL element layer, and a polarizing plate disposed at a side of the liquid crystal element layer that faces an observer. The liquid crystal element layer includes two transparent substrates and a liquid crystal layer disposed between the two transparent substrates. The liquid crystal element layer is configured to be able to, by applying a voltage to the liquid crystal layer, cause a substantially quarter-wavelength retardation in light passing through the liquid crystal layer.Type: ApplicationFiled: January 30, 2023Publication date: August 3, 2023Applicant: Sharp Display Technology CorporationInventors: Naru USUKURA, Masahiro IMAI, Yuhichiroh MURAKAMI, Takahiro YAMAGUCHI, Shige FURUTA
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Patent number: 11714203Abstract: According to an aspect, an active matrix substrate of an X-ray imaging panel includes: an active matrix substrate having a pixel region including a plurality of pixels; and a scintillator that converts X-rays projected onto the X-ray imaging panel to scintillation light. The plurality of pixels include respective photoelectric conversion elements. The active matrix substrate further includes a first planarizing film that covers the photoelectric conversion elements, is formed from an organic resin film, and has a plurality of first contact holes and a first wiring line that is formed in the first contact holes and in a layer upper than the first planarizing film and connected to the photoelectric conversion elements within the first contact holes.Type: GrantFiled: April 12, 2022Date of Patent: August 1, 2023Assignee: Sharp Display Technology CorporationInventors: Makoto Nakazawa, Rikiya Takita, Fumiki Nakano
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Patent number: 11715437Abstract: A light control panel including an image display region including a region corresponding to an image display region in a display panel and a region corresponding to a peripheral circuit region in the display panel is provided between the display panel and a backlight. A pattern image for controlling radiation of light emitted from the backlight to the display panel is displayed in the image display region in the light control panel according to an action state of the peripheral circuit in the display panel.Type: GrantFiled: May 23, 2022Date of Patent: August 1, 2023Assignee: SHARP DISPLAY TECHNOLOGY CORPORATIONInventors: Yohei Takeuchi, Akira Tagawa, Yasuaki Iwase, Jun Nishimura
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Patent number: 11709399Abstract: Provided is a liquid crystal display device including a first and second sub-pixels and including a first and second substrates. The first substrate includes a common electrode, an interlayer insulating film, and a first and second sub-pixel electrodes. The first and second sub-pixel electrodes each include linear electrode portions at an edge area and a linear electrode portion at a central area. The interlayer insulating film includes a region overlapping the linear electrode portions at the edge area and a region overlapping the linear electrode portion at the central area for each sub-pixel and the regions are different in at least one of a film thickness or a relative permittivity. An electric field strength between the common electrode and the linear electrode portions at the edge area is lower than an electric field strength between the common electrode and the linear electrode portion at the central area.Type: GrantFiled: December 8, 2022Date of Patent: July 25, 2023Assignee: Sharp Display Technology CorporationInventors: Tetsuo Fukaya, Mitsuru Chida, Yoshito Hashimoto
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Publication number: 20230229257Abstract: 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: ApplicationFiled: January 3, 2023Publication date: July 20, 2023Applicant: Sharp Display Technology CorporationInventors: Takuya HENMI, Satoshi SEKIDO, Keisuke KANDA, Yuhji SATOH
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Patent number: 11703967Abstract: A display panel includes a common electrode formed in an upper layer above a data line, a first insulating layer covering the common electrode, a touch sensor line formed in an upper layer of the first insulating layer and in a first opening provided in the first insulating layer, and connected to the common electrode via the first opening, a second insulating layer covering the touch sensor line, and a pixel electrode formed in an upper layer of the second insulating layer. The first insulating layer is formed with a second opening between the common electrode and the pixel electrode. The second insulating layer is disposed in an interior of the second opening and formed with a recessed portion recessed downward into a portion above the second opening. At least a portion of the pixel electrode is disposed in the recessed portion of the second insulating layer.Type: GrantFiled: January 5, 2022Date of Patent: July 18, 2023Assignee: SHARP DISPLAY TECHNOLOGY CORPORATIONInventors: Katsushige Asada, Hajime Imai, Yoshihito Hara, Akihiro Shohraku, Isao Ogasawara, Yuki Yamashita
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Patent number: 11698556Abstract: The liquid crystal display device includes a liquid crystal panel, the liquid crystal panel including sub-pixels and including an active matrix substrate and a counter substrate, the active matrix substrate including a gate line, a first electrode, and a second electrode, the counter substrate including a third electrode, each of the sub-pixels being provided with an optical opening, the third electrode including a linear electrode extending along the gate line, a distance between the linear electrode and the optical opening being less than D/4 and a width of the linear electrode being D/4 or less, wherein a distance between two optical openings adjacent in the direction perpendicular to the extending direction of the gate line is defined as D.Type: GrantFiled: April 7, 2022Date of Patent: July 11, 2023Assignee: SHARP DISPLAY TECHNOLOGY CORPORATIONInventors: Koji Murata, Kosuke Nagata, Kazutoshi Kida, Kazutaka Hanaoka, Shinji Shimada, Yasuhiro Haseba
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Patent number: 11693510Abstract: A touch panel system includes a touch panel including a drive electrode, a position detection electrode, and a pressing detection electrode, and a controller configured to impart a drive signal to the drive electrode and acquire signal values from each of the position detection electrode and the pressing detection electrode. The controller detects a position of an indicator on the basis of the signal values obtained from the position detection electrode and calculates a magnitude of pressing of the indicator on the basis of signal values in a pressing detection range corresponding to the detected position of the indicator among the signal values obtained from the pressing detection electrode.Type: GrantFiled: April 15, 2022Date of Patent: July 4, 2023Assignee: Sharp Display Technology CorporationInventors: Takenori Maruyama, Kazutoshi Kida, Shinji Yamagishi, Takuma Yamamoto, Yasuhiro Sugita, Hiroshi Fukushima
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Patent number: 11675460Abstract: A control circuit of an in-cell touch panel device associates a touch position P1 and a touch position P2 with each other when a refresh rate is F1 and a touch-to-touch distance d1 between the successive touch positions P1 and P2 is equal to or less than a determination distance D1. The control circuit associates a touch position P3 and a touch position P4 with each other when a touch-to-touch distance d2 between the touch position P3 detected last in a period in which the refresh rate is F2 lower than F1 and the touch position P4 detected first since a period in which the refresh rate is F1 starts is equal to or less than a determination distance D2 greater than the determination distance D1.Type: GrantFiled: September 20, 2022Date of Patent: June 13, 2023Assignee: Sharp Display Technology CorporationInventors: Daiji Kitagawa, Jin Miyazawa, Yousuke Nakamura, Daisuke Suehiro
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Patent number: 11644729Abstract: An active matrix substrate includes a first pixel region defined by first and second source bus lines adjacent to each other and first and second gate bus lines adjacent to each other and further includes a first pixel electrode and a first oxide semiconductor TFT that are associated with the first pixel region. The first oxide semiconductor TFT includes an oxide semiconductor layer and a gate electrode electrically connected to the first gate bus line. The oxide semiconductor layer includes a channel region and a low-resistance region including first and second regions located on opposite sides of the channel region. When viewed in a direction normal to the substrate, the low-resistance region extends across the first source bus line to another pixel region and partially overlaps a pixel electrode disposed in the other pixel region with an insulating layer interposed therebetween.Type: GrantFiled: May 13, 2022Date of Patent: May 9, 2023Assignee: SHARP DISPLAY TECHNOLOGY CORPORATIONInventors: Jun Nishimura, Akira Tagawa, Yasuaki Iwase, Yohei Takeuchi
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Patent number: 11644715Abstract: A liquid crystal display device includes a first substrate; a second substrate; and a vertical alignment-type liquid crystal layer. The first substrate includes a backplane circuit, a first interlayer insulating layer covering the backplane circuit, a first reflective electrode provided on the first interlayer insulating layer and including a first region located in each of pixels and a second region located between any two adjacent pixels, a second interlayer insulating layer covering the first reflective electrode, and a pixel electrode provided on the second interlayer insulating layer in each pixel. The pixel electrode is electrically connected with the backplane circuit in first and second contact holes formed in the first and second interlayer insulating layers. The first substrate further includes a second reflective electrode provided on the second interlayer insulating layer so as to overlap the first contact hole as seen in a direction normal to a display surface.Type: GrantFiled: July 7, 2022Date of Patent: May 9, 2023Assignee: SHARP DISPLAY TECHNOLOGY CORPORATIONInventors: Takashi Satoh, Takahiro Sasaki, Hiroyuki Hakoi, Ming Ni
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Patent number: 11635563Abstract: A backlight device includes at least a plurality of LEDs arranged in a row, a light guide plate including at least a light entering end face having a plate shape, and a light refracting portion configured with a plurality of unit light refracting portions arranged side by side on the light entering end face along an alignment direction of the plurality of LEDs, wherein in the light refracting portion, an occupancy rate occupied by the unit light refracting portion in an end side portion of the light entering end face in the alignment direction is made lower than an occupancy rate occupied by the unit light refracting portion in a central side portion of the light entering end face in the alignment direction.Type: GrantFiled: February 18, 2022Date of Patent: April 25, 2023Assignee: Sharp Display Technology CorporationInventors: Yuuichi Kanbayashi, Shugo Yagi, Satoshi Tsubooka
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Patent number: 11630542Abstract: A touch panel includes a transmission electrode layer that includes a transmission electrode to which a drive signal is supplied, a reception electrode layer that includes a position detection electrode and a pressing force detection electrode that form capacitance between the transmission electrode layer and themselves, in accordance with the capacitance, at least one of touching and pressing force is detected. The touch panel further includes a pressure-sensitive layer interposed between the transmission electrode layer and the reception electrode layer. The pressure-sensitive layer includes a first dielectric layer of which dielectric constant exhibits negative temperature properties in a predetermined temperature range, and a second dielectric layer of which dielectric constant exhibits positive temperature properties in the predetermined temperature range.Type: GrantFiled: September 6, 2022Date of Patent: April 18, 2023Assignee: Sharp Display Technology CorporationInventors: Takuma Yamamoto, Takenori Maruyama, Shinji Yamagishi, Kazutoshi Kida, Yasuhiro Sugita, Hiroshi Fukushima
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Patent number: 11620020Abstract: A display device includes pixel electrode groups and a touch detection driver. During a period, the touch detection driver does not supply touch detection driving signals to a transmitter electrode overlapping in plan view a pixel electrode group to which gate signals are being supplied, and supply touch detection driving signals to a transmitter electrode disposed so as to overlap in plan view a pixel electrode group to which gate signals are not being supplied.Type: GrantFiled: January 5, 2022Date of Patent: April 4, 2023Assignee: SHARP DISPLAY TECHNOLOGY CORPORATIONInventors: Kazutoshi Kida, Yasuhiro Sugita
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Patent number: 11604537Abstract: A display device includes a touch panel, a panel control unit, and a storage unit configured to store an image signal. The panel control unit provides control to perform a touch detection operation and a write operation in an alternating manner in an image input period and to perform at least the touch detection operation at regular intervals in a suspension period. When an image input period starts, the panel control unit provides control to perform the write operation after an ongoing or subsequent touch detection operation finishes.Type: GrantFiled: March 9, 2022Date of Patent: March 14, 2023Assignee: SHARP DISPLAY TECHNOLOGY CORPORATIONInventors: Yousuke Nakamura, Daiji Kitagawa, Jin Miyazawa, Daisuke Suehiro
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Patent number: 11605359Abstract: A display apparatus includes: a display panel including a display region, a first peripheral region, and a second peripheral region; and a circuit substrate. The display panel includes a gate drive circuit, n number of clock main lines, an outer main line and an inner main line, and a plurality of branch wiring lines. The first peripheral region includes a plurality of unit regions. The plurality of unit regions includes a first unit region and a second unit region. A resistance value of the at least one branch wiring line between the inner main line and the outer main line in the first unit region is smaller than a resistance value of the at least one branch wiring line between the inner main line and the outer main line in the second unit region.Type: GrantFiled: June 24, 2022Date of Patent: March 14, 2023Assignee: Sharp Display Technology CorporationInventor: Hidetoshi Nakagawa
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Patent number: 11550187Abstract: The liquid crystal display device includes: a first polarizer having a first transmission axis; a liquid crystal panel; a second polarizer having a second transmission axis; a biaxial retarder having a slow axis parallel to the second transmission axis; a third polarizer having a third transmission axis parallel to the second transmission axis; and a backlight, a back side polarizer portion that includes the second polarizer, the biaxial retarder, and the third polarizer satisfying the following formula (1): ?YI2=YI2?? YI2<0 (1) wherein YI2? represents a yellowness index in observation from an oblique direction, YI2 represents a yellowness index in observation from a front direction, and ?YI2 represents a difference between YI2? and YI2, wherein the front direction represents a direction at a 0° polar angle and the oblique direction represents a direction at a 60° polar angle and a 45° azimuth.Type: GrantFiled: February 15, 2022Date of Patent: January 10, 2023Assignee: Sharp Display Technology CorporationInventors: Yuichi Kawahira, Takako Koide, Masahiro Hasegawa, Akira Sakai
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Patent number: 11507212Abstract: A display device includes a switching element that switches, based on data held by a memory circuit, between a state in which a pixel electrode and a first wiring line are connected to each other and a state in which the pixel electrode and a second wiring line are connected to each other, a power source circuit for white color that supplies a first signal having the opposite phase to a phase of a drive signal, to the first wiring line provided at a pixel in which a Tx electrode is disposed, and a power source circuit for black color that supplies, to the second wiring line, a second signal having the same phase as the phase of the drive signal.Type: GrantFiled: April 4, 2022Date of Patent: November 22, 2022Assignee: Sharp Display Technology CorporationInventors: Kazutoshi Kida, Yasuhiro Sugita