公开(公告)号：US20230236677A1

公开(公告)日：2023-07-27

申请号：US18098122

申请日：2023-01-18

Applicant: NOVATEK Microelectronics Corp.

Inventor： Hao-Wei Cheng ,  Chin-Lin Lee

IPC: G06F3/0354

CPC classification number: G06F3/03545

Abstract: A stylus control circuit used to control a stylus includes a positioning signal generator. The positioning signal generator is used to generate a first positioning signal having a first frequency and transmit the first positioning signal to the stylus through a first positioning transmission electrode. Wherein, the first frequency corresponds to a position of the first positioning transmission electrode, and the first positioning signal is a frequency signal without carrying any digital data.

公开(公告)号：US11822745B2

公开(公告)日：2023-11-21

申请号：US17891628

申请日：2022-08-19

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Hao-Wei Cheng ,  Cheng-Wei Pan

IPC: G06F3/041 ,  G06F3/044 ,  G06F3/0354

CPC classification number: G06F3/0418 ,  G06F3/03545 ,  G06F3/0441 ,  G06F3/0442 ,  G06F3/04166

Abstract: Provided are a driving method of a touch display panel, a driving circuit and a touch display device. The driving method includes: obtaining a touch position of an active stylus; determining a first region on the touch display panel based on the touch position of the active stylus; and transmitting an uplink (UL) signal to touch sensing electrodes in the first region and transmitting an anti-interference signal to the touch sensing electrodes in at least a part of the region except for the first region on the touch display panel during an UL transmission period, wherein the UL signal transmitted to the touch sensing electrodes in the first region during the UL transmission period is for transmission to the active stylus.

公开(公告)号：US20240012493A1

公开(公告)日：2024-01-11

申请号：US18372064

申请日：2023-09-23

Applicant: NOVATEK Microelectronics Corp.

Inventor： Hao-Wei Cheng ,  Chin-Lin Lee

IPC: G06F3/038 ,  G06F3/0354 ,  G06F3/041

CPC classification number: G06F3/0383 ,  G06F3/03545 ,  G06F3/04166 ,  G06F3/04162 ,  G06F2203/0384 ,  G06F3/0441

Abstract: A stylus used to interact with a plurality of positioning transmission electrodes includes a receiver and a demodulation circuit. The receiver receives an uplink signal carrying a plurality of positioning signals which are transmitted from the plurality of positioning transmission electrodes. The demodulation circuit, coupled to the receiver, demodulates the uplink signal to generate at least one positioning signal among the plurality of positioning signals.

公开(公告)号：US20230140181A1

公开(公告)日：2023-05-04

申请号：US17891628

申请日：2022-08-19

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Hao-Wei Cheng ,  Cheng-Wei Pan

IPC: G06F3/041 ,  G06F3/044 ,  G06F3/0354

Abstract: Provided are a driving method of a touch display panel, a driving circuit and a touch display device. The driving method includes: obtaining a touch position of an active stylus; determining a first region on the touch display panel based on the touch position of the active stylus; and transmitting an uplink (UL) signal to touch sensing electrodes in the first region and transmitting an anti-interference signal to the touch sensing electrodes in at least a part of the region except for the first region on the touch display panel during an UL transmission period, wherein the UL signal transmitted to the touch sensing electrodes in the first region during the UL transmission period is for transmission to the active stylus.