Patent ID: 9569036
Date: 2017-02-14
CPC Classifications: G06F

Claim:
1. A multi-touch system, comprising: a control device; and a plurality of touch sensing sub-systems arranged in a touch sensing row in sequence and coupled to the control device respectively, wherein the touch sensing row includes a pair of longitudinal sides opposite to each other and a pair of end sides opposite to each other and a light reflective frame is configured on one of the longitudinal sides and both of the end sides and each of the touch sensing sub-systems comprises: wherein the control device initiates the sensors of each of the touch sensing sub-systems in the touch sensing row in sequence so as to receive a sensing signal from each of the touch sensing sub-systems, wherein the control device determines whether a touch point number sensed by each of the sensors of the touch sensing sub-systems corresponding to the sensing signal is more than one according to each of the sensing signals, wherein when the touch point number sensed by each of the sensors of the corresponding touch sensing sub-system is one, the touch sensing device determines that there is a touch point in the corresponding touch sensing sub-system and calculates a coordinate of the touch point in the corresponding touch sensing sub-system according to the corresponding sensing signal, as for each of the touch sensing sub-system, when not all of the touch point numbers respectively sensed by the sensors of the corresponding touch sensing sub-system is one: determining whether the touch point number sensed by at least one of the sensors of the touch sensing sub-system is zero; when it is determined the touch point number sensed by at least one of the sensors of the touch sensing sub-system is zero, determining there is no touch point within the touch sensing sub-system; as for each of the touch sensing sub-system, when at least one of the sensors of the touch sensing sub-system is not zero, and the touch point number sensed by one of the sensors of the corresponding touch sensing sub-system is more than one, the touch sensing device performs an excluding process on the sensing signal according to a signal strength threshold, wherein the signal strength threshold is set according to the touch sensing signal strength at the border of the touch sensing sub-system.