Touch sensor and touch point positioning method thereof

Abstract

The invention discloses a touch sensor. The touch sensor comprises a plurality of first-dimension transparent conducting electrodes, a plurality of second-dimension transparent conducting electrodes, one or more signal generators, one or more analog-digital converters, and one or more arithmetic units. The first-dimension transparent conducting electrodes and the second-dimension transparent conducting electrodes are used for forming a plurality of touch sensing points. The signal generators are used for generating at least two orthogonal signals and enabling the orthogonal singles to be simultaneously coupled with at least two of the first-dimension transparent conducting electrodes respectively. The analog-digital converters are used for receiving a plurality of sensing signals of the second-dimension transparent conducting electrodes. The arithmetic units are used for converting the sensing signals so as to judge the composition of the orthogonal signals in the sensing signals and to position at least one touch point on the touch sensing points.

Description

technical field [0001] The present invention relates to a touch sensor and a touch point positioning method thereof, in particular to a method that can simultaneously send out multiple distinguishable signals for sensing, and judge the respective components of the multiple distinguishable signals in the sensed signals to quickly A touch sensor for locating touch points and a touch point locating method thereof. Background technique [0002] Generally speaking, conventional methods for locating touch points of touch sensing devices use time-domain scanning signals in conjunction with scanning timings to intercept panel sensing signals, and use the scanning sequence as the corresponding position alignment. [0003] For example, please refer to figure 1 and figure 2 , figure 1 is a schematic diagram of a conventional touch sensing device 10, figure 2 for figure 1 A schematic diagram of the scanning frequency signals w(1)˜w(k) and a timing synchronization signal Syn is sh...

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Problems solved by technology

[0005] However, when the conventional touch sensing device 10 performs time-domain scanning positioning, the vertical transparent conductive electrodes Tc(1)-Tc(k) need to be scanned one by one with the scanning frequency signals w(1)-w(k), and the timing needs to be matched. The synchronous signal Syn intercepts the data of the sensing signals s(1)~s(j), so it is slow and susceptible to interference

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