Novatek Microelectronics Corp.

Yuan-Fu Hsueh

Yun-Hsiang Yeh

Feng-Lin Chan

Hung-Kai Chen

Chun-Yuan Pai

Tsung-Yu Wang

Pei-Hsin Huang

A touch detection method, suitable for a touch display panel including touch sensing columns, includes following steps. The touch sensing columns are grouped in a first order during a first frame. The touch sensing columns grouped in the first order are scanned for detecting a first touched column during the first frame. The touch sensing columns are grouped in a second order during a second frame. The second order is assigned according to the first touched column. The first touched column and adjacent columns next to the first touched column are grouped together in one group in the second order. The touch sensing columns grouped in the second order are scanned for detecting a second touched column during the second frame.

Touch detection method

A stylus and a touch device are provided. The stylus includes a tip portion and a transmission electrode. The transmission electrode is disposed on the tip portion. The transmission electrode transmits a downlink signal to the touch device. The touch device includes a touch panel and a touch processing circuit. The touch processing circuit is coupled to the touch panel. The touch processing circuit receives the downlink signal from the stylus through the touch panel. The downlink signal includes a plurality of different frequencies.

Stylus and touch device for encoding and transmitting signal having multiple frequencies

The driving apparatus for driving a touch display panel includes a first voltage generating circuit configured to generate a common reference voltage, a second voltage generating circuit configured to generate a touch driving signal, and a control circuit configured to generate a switching signal. The switching signal is at the first voltage level during display periods for providing the common reference voltage to the touch display panel. The switching signal is at the second voltage level during touch periods for providing the touch driving signal to the touch display panel. A first touch display period includes a first display period a first touch period adjacent to the first display period. A second touch display period includes a second display period and a second touch period adjacent to the second display period. The first touch display period and the second touch display period are different in time length.

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Hsinchu, Taiwan

Yuan-Fu Hsueh