Patent ID: 9372572
Filing Date: 2016-06-21
CPC Classification: G06F

Claim Text:
1. A touch locating method for locating a touch position and a touch direction of an indication object on a touch area of an optical touch system, the indication object having an outer surface and a light emitter disposed on a side of the outer surface, the optical touch system comprising a first optical sensor and a second optical sensor disposed at a circumference of the touch area, the touch locating method comprising the following steps: (a) the first optical sensor and the second optical sensor sensing the indication object to determine a center position of the indication object on the touch area by an optical location means; (b) the light emitter emitting an indication light out of the outer surface; (c) the first optical sensor and the second optical sensor receiving the indication light so as to determine a light-emitting position of the light emitter on the touch area, wherein the light-emitting position is distinct from and around the center position; and (d) determining the touch position according to the center position and determining the touch direction according to a relative relationship between the center position and the light-emitting position.