Patent ID: 9639209
Date: 2017-05-02
CPC Classifications: G06F

Claim:
1. An optical touch system for sensing a touch performed on a touch area, comprising: a first optical sensing module, the first optical sensing module comprising a first mounting base and a first light sensing device, the first mounting base having a first alignment structure, the first alignment structure having two first non-parallel structural edges, the first light sensing device being disposed on the first mounting base, the first optical sensing module being disposed at a first corner of the touch area such that the first alignment structure is aligned with a profile of the first corner so that the two first non-parallel structural edges contact two adjacent edges of the profile of the first corner in parallel respectively, and the first light sensing device faces the touch area, the first light sensing device being used for generating a first signal relative to the touch, the first light sensing device being shifted from the first corner by a first vertical offset and a first horizontal offset; a second optical sensing module, the second optical sensing module comprising a second mounting base and a second light sensing device, the second mounting base having a second alignment structure, the second alignment structure having two second non-parallel structural edges, the second light sensing device being disposed on the second mounting base, the second optical sensing module being disposed at a second corner of the touch area such that the second alignment structure is aligned with a profile of the second corner so that the two second non-parallel structural edges contact two adjacent edges of the profile of the second corner in parallel respectively, and the second light sensing device faces the touch area, the second light sensing device being used for generating a second signal relative to the touch, the second light sensing device being shifted from the second corner by a second vertical offset and a second horizontal offset, the two adjacent edges of the profile of the first corner and the two adjacent edges of the profile of the second corner being coplanar; and a processing module connected in communication to the first light sensing device and the second light sensing device, for receiving the first signal and the second signal and generating coordinates relative to the touch according to the first signal, the second signal, the first vertical offset, the first horizontal offset, the second vertical offset, the second horizontal offset, and a distance between the first light sensing device and the second light sensing device.