Stmicroelectronics (shenzhen) R&d Co. Ltd.

Stmicroelectronics (beijing) R&d Company Ltd.

Bowei Chen

Yue Ding

Guodong Sun

Pan Wang

According to an embodiment, a system for synchronizing a stylus-enabled device with a stylus is proposed. The stylus-enabled device includes a touch controller configured to transmit an uplink signal to the stylus, receive a downlink signal from the stylus, determine a timing offset between the uplink signal and the downlink signal, determine a phase shift of the downlink signal, and adjust a synchronization timing based on the determined timing offset and the determined phase shift.

Touch controller synchronization with the downlink signal of stylus

A method for operating an electronic device includes detecting, by a touchscreen controller, a touch point on a touchscreen; determining, by the touchscreen controller, coordinates of the touch point; scaling, by the touchscreen controller, up the coordinates of the touch point to obtain scaled up coordinates by overwriting a reserved portion of a touch event protocol with additional information corresponding to the coordinates of the touch point; reporting, by the touchscreen controller, the scaled up coordinates of the touch point to an application processor; and determining, by the application processor, the coordinates of the touch point with an increased resolution by converting the scaled up coordinates into a floating point value.

Growing community of inventors

Shenzhen, China

Bowei Chen