公开(公告)号：US12026334B2

公开(公告)日：2024-07-02

申请号：US18135041

申请日：2023-04-14

Applicant: Sharp Display Technology Corporation

Inventor： Daisuke Suehiro ,  Daiji Kitagawa ,  Noriyuki Tanaka ,  Tatsuhiko Suyama ,  Jin Miyazawa ,  Yousuke Nakamura

IPC: G06F3/041 ,  G09G3/36

CPC classification number: G06F3/0412 ,  G06F3/04164 ,  G09G3/3655

Abstract: 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.

公开(公告)号：US12271547B2

公开(公告)日：2025-04-08

申请号：US18514531

申请日：2023-11-20

Applicant: Sharp Display Technology Corporation

Inventor： Daiji Kitagawa ,  Jin Miyazawa ,  Yousuke Nakamura ,  Daisuke Suehiro

IPC: G06F3/041

Abstract: A display device with a touch panel includes a touch panel including a pixel electrode, and a control unit executing a write process of writing a data signal on the pixel electrode and a touch detection process by the touch panel. The control unit determines an executable number of times of the touch detection process based on the length of the pause period, alternately executes the touch detection process and the write process in the display period, and executes the touch detection process a number of times equal to or less than the determined executable number of times in the pause period.

公开(公告)号：US20250111834A1

公开(公告)日：2025-04-03

申请号：US18883182

申请日：2024-09-12

Applicant: Sharp Display Technology Corporation

Inventor： Yousuke NAKAMURA ,  Daiji Kitagawa ,  Daisuke Suehiro ,  Jin Miyazawa

IPC: G09G3/36

Abstract: A drive control circuit that controls operations of liquid crystal drive circuits (a gate driver and a source driver) is provided with a counter that counts a polarity bias value that represents polarity bias of a data voltage applied to liquid crystal capacitance. During a scan frame period in which the polarity bias value is greater than a predetermined upper limit at a start of input of one frame of the image signal, the drive control circuit controls operations of the liquid crystal drive circuits so that the polarity bias value becomes smaller. During a scan frame period in which the polarity bias value is smaller than a predetermined lower limit at the start of input of one frame of the image signal, the drive control circuit controls the operations of the liquid crystal drive circuits so that the polarity bias value becomes larger.

公开(公告)号：US11675460B2

公开(公告)日：2023-06-13

申请号：US17948241

申请日：2022-09-20

Applicant: Sharp Display Technology Corporation

Inventor： Daiji Kitagawa ,  Jin Miyazawa ,  Yousuke Nakamura ,  Daisuke Suehiro

IPC: G06F3/041 ,  G09G3/36 ,  G06F3/044

CPC classification number: G06F3/04186 ,  G06F3/0412 ,  G06F3/04166 ,  G09G3/36 ,  G06F3/044 ,  G06F2203/04104 ,  G09G2340/0435 ,  G09G2354/00

Abstract: 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.

公开(公告)号：US20240411402A1

公开(公告)日：2024-12-12

申请号：US18659810

申请日：2024-05-09

Applicant: Sharp Display Technology Corporation

Inventor： Daisuke Suehiro ,  Daiji Kitagawa ,  Jin Miyazawa ,  Yousuke Nakamura

IPC: G06F3/041

Abstract: A display device with a touch panel starts a first touch detection process within an extension period, and ends the first touch detection process before a normal drive period starts. The display device with a touch panel performs a process of outputting first report data when a length of the extension period is equal to or longer than a predetermined length. The display device with a touch panel performs, after the normal drive period starts, a second touch detection process, a writing process, and a process of outputting second report data.

公开(公告)号：US11604537B2

公开(公告)日：2023-03-14

申请号：US17690075

申请日：2022-03-09

Applicant: Sharp Display Technology Corporation

Inventor： Yousuke Nakamura ,  Daiji Kitagawa ,  Jin Miyazawa ,  Daisuke Suehiro

IPC: G09G3/36 ,  G06F3/041 ,  G06F3/044

Abstract: 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.

公开(公告)号：US11928283B2

公开(公告)日：2024-03-12

申请号：US18095241

申请日：2023-01-10

Applicant: Sharp Display Technology Corporation

Inventor： Jin Miyazawa ,  Noriyuki Tanaka ,  Daiji Kitagawa ,  Tatsuhiko Suyama ,  Yousuke Nakamura ,  Daisuke Suehiro

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/04166 ,  G06F3/044

Abstract: 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.

公开(公告)号：US11726361B2

公开(公告)日：2023-08-15

申请号：US17886521

申请日：2022-08-12

Applicant: Sharp Display Technology Corporation

Inventor： Kosuke Nagata ,  Kazutoshi Kida ,  Daiji Kitagawa

IPC: G02F1/1333 ,  G06F3/044 ,  G06F3/041

CPC classification number: G02F1/13338 ,  G06F3/0444 ,  G06F3/0446 ,  G06F3/04164

Abstract: 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.