公开(公告)号：US12260030B1

公开(公告)日：2025-03-25

申请号：US18396751

申请日：2023-12-27

Applicant: Novatek Microelectronics Corp.

Inventor： Tsung-Yu Wang ,  Yun-Hsiang Yeh ,  Yuan-Fu Hsueh

IPC: G06F3/03 ,  G06F3/0354 ,  G06F3/044

Abstract: A stylus and a touch device are provided. The stylus includes a tip portion and a transmission electrode. The transmission electrode is disposed on the tip portion. The transmission electrode transmits a downlink signal to the touch device. The touch device includes a touch panel and a touch processing circuit. The touch processing circuit is coupled to the touch panel. The touch processing circuit receives the downlink signal from the stylus through the touch panel. The downlink signal includes a plurality of different frequencies.

公开(公告)号：US11194424B2

公开(公告)日：2021-12-07

申请号：US16876167

申请日：2020-05-18

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Feng-Lin Chan ,  Hung-Kai Chen ,  Yuan-Fu Hsueh ,  Chun-Yuan Pai

IPC: G06F3/041

Abstract: The driving apparatus for driving a touch display panel includes a first voltage generating circuit configured to generate a common reference voltage, a second voltage generating circuit configured to generate a touch driving signal, and a control circuit configured to generate a switching signal. The switching signal is at the first voltage level during display periods for providing the common reference voltage to the touch display panel. The switching signal is at the second voltage level during touch periods for providing the touch driving signal to the touch display panel. A first touch display period includes a first display period a first touch period adjacent to the first display period. A second touch display period includes a second display period and a second touch period adjacent to the second display period. The first touch display period and the second touch display period are different in time length.

公开(公告)号：US10656751B2

公开(公告)日：2020-05-19

申请号：US15975810

申请日：2018-05-10

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Feng-Lin Chan ,  Hung-Kai Chen ,  Yuan-Fu Hsueh ,  Chun-Yuan Pai

IPC: G06F3/041 ,  G06F3/044

Abstract: The driving apparatus for driving a touch display panel includes a first voltage generating circuit configured to generate a common reference voltage, a second voltage generating circuit configured to generate a touch driving signal, and a control circuit configured to generate a switching signal. The switching signal is at the first voltage level during display periods for providing the common reference voltage to the touch display panel. The switching signal is at the second voltage level during touch periods for providing the touch driving signal to the touch display panel. A first touch display period includes a first display period a first touch period adjacent to the first display period. A second touch display period includes a second display period and a second touch period adjacent to the second display period. The first touch display period and the second touch display period are different in time length.