Positioning module, optical touch system and method of calculating a coordinate of a touch medium

摘要

A positioning module of calculating a coordinate of a touch medium is disclosed in the present invention. The positioning module includes at least one image detecting unit, a first light source, a second light source and a processor. The image detecting unit includes a lateral side and an upper side. The image detecting unit captures an image reflected from a reflection component. The first light source is disposed on the lateral side and outputs a first beam. The second light source is disposed on the upper side and outputs a second beam. The processor is electrically connected to the image detecting unit. The processor determines a touch status of the touch medium according to a first image generated by the first beam, and further determines a touch coordinate of the touch medium according to a second image generated by the second beam.

主权项

1. A positioning module for calculating coordinates of a touch medium, the positioning module comprising:
at least one image detecting unit, the image detecting unit comprising a bottom side, a lateral side and an upper side, the bottom side being opposite to the upper side and the lateral side being connected between the bottom side and the upper side, the bottom side of the image detecting unit being disposed on a panel; a first light source disposed on the panel whereon the bottom side is disposed, and the first light source being adjacent to the lateral side for emitting a first beam; a second light source disposed on the upper side for emitting a second beam, wherein an angle between the panel and a projection direction of the second light source is greater than an angle between the panel and a projection direction of the first light source; and a processor electrically connected to the image detecting unit, the processor determining a touch status of the touch medium according to a first image generated by the first beam, and further determining a touch position of the touch medium according to a second image generated by the second beam, wherein the first light source and the second light source are respectively actuated by the processor, the processor actuates the first light source to generate the first image, and determines whether the second light source is actuated to generate the second image according to the touch status by analyzing the first image.