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：US20230273697A1

公开(公告)日：2023-08-31

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：US20230333679A1

公开(公告)日：2023-10-19

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：US20220291802A1

公开(公告)日：2022-09-15

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: G06F3/041 ,  G06F3/044 ,  G09G3/36

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.