Patents by Inventor Daisuke SUEHIRO
Daisuke SUEHIRO has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11928283Abstract: A display device includes: a display panel including a sensor unit configured to detect a touch operation; a first control unit configured to supply a first signal to the display panel; and a second control unit configured to calculate touch information related to the touch operation and to supply the touch information to the first control unit. The first control unit includes: a signal generator configured to generate the first signal based on an image signal supplied from an external image signal supply source; and an overdrive circuit configured to perform a process of increasing an amplitude of the first signal generated by the signal generator. The overdrive circuit is actuated based on the touch information from the second control unit. The first control unit, in response to the actuation of the overdrive circuit, supplies the first signal having the amplitude increased by the overdrive circuit to the display panel.Type: GrantFiled: January 10, 2023Date of Patent: March 12, 2024Assignee: Sharp Display Technology CorporationInventors: Jin Miyazawa, Noriyuki Tanaka, Daiji Kitagawa, Tatsuhiko Suyama, Yousuke Nakamura, Daisuke Suehiro
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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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Publication number: 20230273697Abstract: A display device includes: a display panel including a sensor unit configured to detect a touch operation; a first control unit configured to supply a first signal to the display panel; and a second control unit configured to calculate touch information related to the touch operation and to supply the touch information to the first control unit. The first control unit includes: a signal generator configured to generate the first signal based on an image signal supplied from an external image signal supply source; and an overdrive circuit configured to perform a process of increasing an amplitude of the first signal generated by the signal generator. The overdrive circuit is actuated based on the touch information from the second control unit. The first control unit, in response to the actuation of the overdrive circuit, supplies the first signal having the amplitude increased by the overdrive circuit to the display panel.Type: ApplicationFiled: January 10, 2023Publication date: August 31, 2023Inventors: Jin MIYAZAWA, Noriyuki TANAKA, Daiji KITAGAWA, Tatsuhiko SUYAMA, Yousuke NAKAMURA, Daisuke SUEHIRO
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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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Publication number: 20230104048Abstract: 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: ApplicationFiled: September 20, 2022Publication date: April 6, 2023Inventors: Daiji KITAGAWA, Jin MIYAZAWA, Yousuke NAKAMURA, Daisuke SUEHIRO
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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: 11475860Abstract: A memory liquid crystal display including a liquid crystal panel with a built-in touch panel is provided with a state control circuit configured to switch a state of a pixel electrode between a floating state and a non-floating state. A pulse signal for touch detection is supplied to a common electrode in a touch detection period. The state control circuit changes the state of the pixel electrode from the non-floating state to the floating state before the start of the touch detection period, and changes the state of the pixel electrode from the floating state to the non-floating state after the end of the touch detection period.Type: GrantFiled: November 16, 2021Date of Patent: October 18, 2022Assignee: SHARP KABUSHIKI KAISHAInventors: Daiji Kitagawa, Jin Miyazawa, Yousuke Nakamura, Daisuke Suehiro, Noriyuki Tanaka
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Publication number: 20220291802Abstract: 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: ApplicationFiled: March 9, 2022Publication date: September 15, 2022Inventors: Yousuke NAKAMURA, Daiji KITAGAWA, Jin MIYAZAWA, Daisuke SUEHIRO
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Patent number: 11428997Abstract: A liquid crystal panel is provided which is capable of performing displaying with sufficiently high quality while reducing power consumption. The liquid crystal panel 20 includes a plurality of pixel electrodes, a plurality of counter electrodes which are smaller in number and larger in individual size than the plurality of pixel electrodes, a liquid crystal layer disposed between the plurality of pixel electrodes and the plurality of counter electrodes, and a control unit configured to control a voltage applied to the plurality of pixel electrodes and a voltage applied to the plurality of counter electrodes. In a predetermined case, the control unit operates in a power saving operation mode in which the control unit performs control such that a fixed voltage is applied to the plurality of pixel electrodes and a voltage corresponding to an image signal is applied to the plurality of counter electrodes.Type: GrantFiled: June 11, 2020Date of Patent: August 30, 2022Assignee: SHARP KABUSHIKI KAISHAInventors: Daisuke Suehiro, Tatsuhiko Suyama, Atsushi Aoki, Daiji Kitagawa
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Patent number: 11397490Abstract: In a memory liquid crystal display including a liquid crystal panel with a built-in touch panel, a black voltage or a white voltage is provided to a pixel electrode in accordance with a value of binary data stored in a memory circuit, and a display voltage generation circuit changes voltage values of the black voltage and the white voltage in synchronization with a continuous pulse voltage for touch detection in a touch detection period so that an absolute value of a voltage between the pixel electrode and a common electrode is maintained at a constant magnitude in each pixel circuit throughout a period from a point in time immediately before the start of the touch detection period to a point in time immediately after the end of the touch detection period.Type: GrantFiled: November 16, 2021Date of Patent: July 26, 2022Assignee: SHARP KABUSHIKI KAISHAInventors: Daiji Kitagawa, Noriyuki Tanaka, Jin Miyazawa, Yousuke Nakamura, Daisuke Suehiro
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Publication number: 20220189428Abstract: A memory liquid crystal display including a liquid crystal panel with a built-in touch panel is provided with a state control circuit configured to switch a state of a pixel electrode between a floating state and a non-floating state. A pulse signal for touch detection is supplied to a common electrode in a touch detection period. The state control circuit changes the state of the pixel electrode from the non-floating state to the floating state before the start of the touch detection period, and changes the state of the pixel electrode from the floating state to the non-floating state after the end of the touch detection period.Type: ApplicationFiled: November 16, 2021Publication date: June 16, 2022Inventors: DAIJI KITAGAWA, JIN MIYAZAWA, YOUSUKE NAKAMURA, DAISUKE SUEHIRO, NORIYUKI TANAKA
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Publication number: 20220187974Abstract: In a memory liquid crystal display including a liquid crystal panel with a built-in touch panel, a black voltage or a white voltage is provided to a pixel electrode in accordance with a value of binary data stored in a memory circuit, and a display voltage generation circuit changes voltage values of the black voltage and the white voltage in synchronization with a continuous pulse voltage for touch detection in a touch detection period so that an absolute value of a voltage between the pixel electrode and a common electrode is maintained at a constant magnitude in each pixel circuit throughout a period from a point in time immediately before the start of the touch detection period to a point in time immediately after the end of the touch detection period.Type: ApplicationFiled: November 16, 2021Publication date: June 16, 2022Inventors: DAIJI KITAGAWA, NORIYUKI TANAKA, JIN MIYAZAWA, YOUSUKE NAKAMURA, DAISUKE SUEHIRO
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Publication number: 20210373733Abstract: A display device includes a liquid crystal layer provided between a first substrate and a second substrate, a plurality of touch sensors provided between the first substrate and the second substrate, a touch detection unit configured to perform control of detecting a touch on the basis of capacitance values of the plurality of touch sensors, a pair of wiring lines connected to at least one of the plurality of touch sensors, and a resistance value acquisition unit connected to the pair of wiring lines and configured to acquire, via the pair of wiring lines, a resistance value of a touch sensor to which the pair of wiring lines are connected.Type: ApplicationFiled: May 12, 2021Publication date: December 2, 2021Inventors: Daiji KITAGAWA, Jin MIYAZAWA, Yousuke NAKAMURA, Daisuke SUEHIRO
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Publication number: 20200409223Abstract: A liquid crystal panel is provided which is capable of performing displaying with sufficiently high quality while reducing power consumption. The liquid crystal panel 20 includes a plurality of pixel electrodes, a plurality of counter electrodes which are smaller in number and larger in individual size than the plurality of pixel electrodes, a liquid crystal layer disposed between the plurality of pixel electrodes and the plurality of counter electrodes, and a control unit configured to control a voltage applied to the plurality of pixel electrodes and a voltage applied to the plurality of counter electrodes. In a predetermined case, the control unit operates in a power saving operation mode in which the control unit performs control such that a fixed voltage is applied to the plurality of pixel electrodes and a voltage corresponding to an image signal is applied to the plurality of counter electrodes.Type: ApplicationFiled: June 11, 2020Publication date: December 31, 2020Inventors: Daisuke SUEHIRO, Tatsuhiko SUYAMA, Atsushi AOKI, Daiji KITAGAWA