公开(公告)号：US20200278782A1

公开(公告)日：2020-09-03

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：US20180329570A1

公开(公告)日：2018-11-15

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

CPC classification number: G06F3/0416 ,  G06F3/044 ,  G06F2203/04112 ,  G09G2310/0243 ,  G09G2310/0264

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.