Industrial Technology Research Institute

Intellectual Property Innovation Corporation

Guan-Jung Luo

Heng-Yin Chen

Yi-Chuan Lu

Chang-Po Chao

Chien-Ju Lee

Ying-Jia Lin

A touch panel driving apparatus generates a differential signal corresponding to a detection result of a touch panel. The touch panel driving apparatus includes a driving circuit, a first integrating sampling circuit, and a second integrating sampling circuit. The first integrating sampling circuit generates a first end signal of the differential signal. The second integrating sampling circuit generates a second end signal of the differential signal. When a touch event does not occur, a level of the first end signal and a level of the second end signal are in a common mode signal range of the differential signal. When the touch event occurs, the first integrating sampling circuit pulls up the level of the first end signal out of the common mode signal range, and the second integrating sampling circuit pulls down the level of the second end signal out of the common mode signal range.

Touch panel driving apparatus

The present disclosure provides a driving device for driving a sensing device having a plurality of driving electrodes and a plurality of sensing electrodes. The driving device includes a signal processing circuit and a readout circuit. The signal processing circuit is electrically connected to the plurality of driving electrodes of the sensing device. The signal processing circuit is configured to generate a plurality of driving signal to drive the sensing device. The signal processing circuit selects a plurality of Walsh codes from a plurality of rows or columns of a Walsh matrix to serve as a plurality of driving signals. The readout circuit readouts the sensing device to generate a plurality of sensing signals and provides the plurality of sensing signals to the signal processing circuit, so that the signal processing circuit demodulates the plurality of sensing signals. In addition, a driving method is also provided.

Driving device and device method

Growing community of inventors

Taichung, Taiwan

Guan-Jung Luo