公开(公告)号：US11422663B1

公开(公告)日：2022-08-23

申请号：US17332357

申请日：2021-05-27

Applicant: STMicroelectronics Asia Pacific Pte Ltd.

Inventor： Kien Beng Tan ,  Eng Jye Ng ,  Hon Siong Ng ,  Tong Tee Tan

IPC: G06F3/044 ,  G06F3/041

Abstract: In an example, a method of sensing on a touchscreen including a plurality of touch sensors arranged in rows and columns on the touchscreen is described. The method includes detecting a passive touch on the touchscreen and a positon of an active stylus; determining a plurality of locations across the touchscreen corresponding to the passive touch and a positon of the active stylus, where each of the plurality of locations corresponds to a location of one of the plurality of touch sensors. The method includes transmitting a first uplink signal to a first group of the plurality of locations including a first fraction of the plurality of locations; and transmitting a second uplink signal to a second group of the plurality of locations including a second fraction of the plurality of locations, the first uplink signal being different from the second uplink signal.

公开(公告)号：US11822746B1

公开(公告)日：2023-11-21

申请号：US17870980

申请日：2022-07-22

Applicant: STMicroelectronics Asia Pacific Pte Ltd.

Inventor： Min Sang Kim ,  Kien Beng Tan ,  Eng Jye Ng ,  Boon Loong Woo ,  Tong Tee Tan

IPC: G06F3/041 ,  G06F3/044 ,  G09G3/3225

CPC classification number: G06F3/04184 ,  G06F3/0446 ,  G06F3/04166 ,  G09G3/3225 ,  G09G2310/08 ,  G09G2320/0247 ,  G09G2354/00

Abstract: A method for operating a display includes receiving a horizontal synchronization (HSYNC) signal from a display driver of the display, the HSYNC signal including a plurality of pulses; measuring a parameter of the HSYNC signal within a frame; and initiating a touch scan on a touch sensing panel of the display based on the measured parameter.