Novatek Microelectronics Corp.

Weijen Chang

Chin-Lin Lee

Yi-Wei Chen

The touch driving integrated circuit (IC) drives the touch sensing electrodes of a touch panel. The touch driving IC sends an uplink signal to an active stylus on the touch panel through the touch panel. The touch driving IC receives a downlink signal from the active stylus through the touch panel. The touch driving IC decodes the downlink signal to obtain posture information about the posture of the active stylus. The touch driving IC reports the posture information of the active stylus together with position information about the position of the active stylus on the touch panel to a system processor.

Touch device, touch driving integrated circuit and operation method

An active stylus and a method performed by the active stylus are provided. The active stylus includes a touch sensor inside. The touch sensor is arranged corresponding to a preset pen-holding region on an outer surface. The touch sensor is insulated from the pen body, when an external operating subject touches the preset pen-holding region and touches a touch panel, an uplink signal transmitted by the touch panel is coupled to the pen body via the external operating subject, as an uplink interference signal. The signal processing unit is for: generating a compensation signal; obtaining a compensated interference signal generated based on the compensation signal and the uplink interference signal; generating an uplink signal to be processed based on the received uplink signal and the compensated interference signal; and obtaining uplink information based on the uplink signal to be processed.

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Tainan, Taiwan

Weijen Chang