US 2015/0145829 A1 · TOUCH LOCATING METHOD AND OPTICAL TOUCH SYSTEM

Abstract

A locating method for an optical touch system determines a center position of an indication object on a touch area of the optical touch system by an optical location means. The locating method determines a light-emitting position of a light emitter of the indication object on the touch area by receiving indication light emitted from the light emitter by two optical sensors. The locating method determines a touch position and a touch direction according to a relative relationship between the center position and the light-emitting position; therein, the touch position can be regarded as a touch point on the touch area by the indication object, and the touch direction can be regarded as a rotation angle of the indication object relative to the touch area.

Claims16

Dependent claims

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, 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) using the first optical sensor and the second optical sensor to determine a center position of the indication object on the touch area by an optical location means;
(b) making the light emitter emit an indication light out of the outer surface;
(c) using the first optical sensor and the second optical sensor to receive the indication light so as to determine a light-emitting position of the light emitter on the touch area;
and
(d) determining the touch position and the touch direction according to a relative relationship between the center position and the light-emitting position.

2 more elements

An optical touch system, comprising:

a touch area;
a touch pen for performing a touch operation on the touch area, the touch pen having an outer surface and a light emitter, the light emitter being used for emitting an indication light out of the outer surface;
a first optical sensor disposed at a first corner of a circumference of the touch area;
a second optical sensor disposed at a second corner of the circumference;
and
a processing module electrically connected to the first optical sensor and the second optical sensor, the processing module using the first optical sensor and the second optical sensor to determine a center position of the touch pen on the touch area by an optical location means, using the first optical sensor and the second optical sensor to receive the indication light so as to determine a light-emitting position of the light emitter on the touch area, and determining a touch position and a touch direction of the touch pen on the touch area according to a relative relationship between the center position and the light-emitting position.

3 more elements

Dependencies are inferred from the claim text.

Touch locating method and optical touch system

Life of this patent

Touch locating method and optical touch system

Life of this patent

Abstract

Claims16