Patent ID: 9535535
Date: 2017-01-03
CPC Classifications: G06F

Claim:
1. A touch point sensing method, adapted to an optical touch system having a first lens and a second lens, the touch point sensing method comprising steps as follows: obtaining and analyzing images of at least two touch objects in a touch detecting area captured by the first lens and the second lens; calculating a first touch signal group and a second touch signal group at a first instant and a second instant according to the images, wherein each of the first touch signal group and the second touch signal group comprises locations of two touch signals; calculating a plurality of distance values between the touch signals in the first touch signal group at the first instant and the touch signals in the first touch signal group and the second touch signal group at the second instant, and determining whether the first touch signal group and the second touch signal group are overlapped at the second instant based on the distance values; and when the first touch signal group and the second touch signal group are overlapped at the second instant, exchanging the locations of the touch signals in the first touch signal group and the second touch signal group.