Touch control chip, touch detection method and device, and terminal equipment

Abstract

The application discloses a touch control chip and a touch detection method. The method comprises: the driving unit inputs driving signals to N driving channels respectively; the sensing unit receives sensing signals output by M-K sensing channels when the driving unit inputs driving signals to each driving channel, and the sensing unit can receive at most A Sensing signals output by the sensing channels, M-K≤A<M; the switching unit switches N driving channels into N sensing channels and switches the other K sensing channels into K driving channels; the driving unit sends the switched K The driving channels respectively input driving signals; the sensing unit receives the sensing signals output by the switched N sensing channels when the driving unit inputs the driving signals to each of the switched K driving channels; the processing unit according to M-K Sensing signals output by the sensing channel and the switched N sensing channels determine touch information. Therefore, in the case of insufficient one-time sampling of the sensing channel, the time consumption is reduced and the detection speed of the touch detection is improved.

Description

technical field [0001] The present application relates to the field of information technology, and more specifically, to a touch control chip, a touch detection method and device, and a terminal device. Background technique [0002] With the development of man-machine interface technology, touch sensing technology has been widely used because of its comfort and convenience of operation. In particular, capacitive touch technology has been widely used in electronic devices such as notebook computers, mobile phones, and MP3 players. [0003] The capacitive touch screen is composed of a touch sensor and a touch controller. The panel of the touch sensor is composed of a group of sensing channels and a group of driving channels. The intersections of these driving channel lines and sensing channels form several capacitive sensing nodes. When there is a touch, the capacitance value of the capacitance sensing node at the corresponding position will change. The touch controller can d...

AI Technical Summary

Problems solved by technology

However, the number of sensing channels for each sampling is limited by the number of original sensing channels themselves

Therefore, when performing touch detection, there may be a situation where the number of sensing channels is insufficient for one-time sampling. For example, there are 20 driving channels and 34 sensing channels, but only the sensing signals output by a maximum of 32 sensing channels can be detected each time. , 20 driving channels need to be coded twice to obtain the sensing signals output by 32 sensing channels and 2 sensing channels respectively, which greatly increases the time of touch detection, affects the refresh rate, and ultimately affects the user experience

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