Patent ID: 9645734
Date: 2017-05-09
CPC Classifications: G06F

Claim:
1. An operation method for an optical touch device comprising a panel, a left-side sensor and a right-side sensor, the method comprising: sensing a sensing waveform on the panel; determining a number of peaks of the sensing waveform; controlling the optical touch device to be switched to a gesture mode or a touch mode according to the number of peaks of the sensing waveform, wherein the number of peaks is equal to a number of objects which touch the panel; sensing a first sensing waveform by the left-side sensor and a second sensing waveform by the right-side sensor; when in the touch mode, determining a position of a user's touch according to pixels on the left-side sensor and the right-side sensor respectively corresponding to peaks of the first sensing waveform and the second sensing waveform; when in the gesture mode, estimating a first variance according to the first sensing waveform and a second variance according to the second sensing waveform during a predetermined duration, and determining a gesture made by the user according to the first variance and the second variance; wherein the first variance includes a degree of dispersion of peaks of the first sensing waveform, and the second variance includes a degree of dispersion of peaks of the second sensing waveform.