Elan Microelectronics Corporation

Tso-Chieh Yang

Yen-Chang Chiu

Yung-Lieh Chien

Jia-Yih Lii

Wen-Kai Lee

Chen-Yao Yang, Legal Representative

Hsuan-Lung Chung

For a compensation to the sensed capacitive values of a touchpad sensor, the variance profile of the base capacitance or the sensed capacitive values of the traces in the touchpad sensor is determined, and then a firmware operation based on the variance profile is carried out to modify the sensed capacitive values or the position value when an object touches on the touchpad sensor, such that the touchpad sensor operates as a symmetrical touchpad sensor does.

Base capacitance compensation for a touchpad sensor

In a movement detection method for multiple objects on a capacitive touchpad, the waveform of sensed values on the touchpad is monitored for its variation to determine respective movements of the objects on the touchpad, and various operational gestures are further determined exactly.

Movement detection method for multiple objects on a capacitive touchpad

In a gesture detection method for a touchpad, various gestures such as tap, drag and double tap are determined by operating an object to touch on the touchpad, leave from the touchpad, and move on the touchpad.

Growing community of inventors

Chingshuei Township, Taichung County, Taiwan

Tso-Chieh Yang