Patent ID: 9342190
Filing Date: 2016-05-17
CPC Classification: G06F

Claim Text:
1. An optical touch apparatus, comprising: a light source module providing a touch light source for a touch area; two optical sensing modules disposed corresponding to two corners of the touch area; and a processing unit coupled to the light source module and the optical sensing modules, wherein the processing unit controls the light source module to provide the touch light source in a first touch mode and a second touch mode, and controls the light source module to stop providing the touch light source in a third touch mode, each of the optical sensing modules continuously senses and outputs a plurality of sensing signals in the first touch mode, the second touch mode and the third touch mode, and the processing unit determines a plurality of touching features of the sensing signals respectively according to the first touch mode, the second touch mode and the third touch mode to calculate positions of a plurality of touching objects on the touch area, wherein the touching features comprise a first touching feature, and the processing unit determines a declining portion in response to the touch light source being blocked in the sensing signals received in the first touch mode as the first touching feature.