Patent ID: 8300011

Claim:
A pointer positioning device for positioning an aiming point pointed through an optical axis on a display screen of an image display, said device comprising: two auxiliary points disposed at a periphery of the display screen and configured to provide light of a predetermined spectrum; an image sensor configured to receive the light of the predetermined spectrum from the auxiliary points to generate electrical signals; an optical filter disposed in front of the image sensor and configured to block light outside the predetermined spectrum such that the image sensor only senses the light of the predetermined spectrum; and a processing and storage unit configured to receive the electrical signals and to correct an initial setup and the aiming point according to a correction vector of the optical axis and a reference distance information, wherein the correction vector of the optical axis is obtained by (i) pointing the aiming point, from a predetermined distance, at one of the two auxiliary points and (ii) calculating a vector between an image of the aiming point as captured by the image sensor and an image of said one of the two auxiliary points as captured by the image sensor, and the reference distance information includes (a) a distance between images of the two auxiliary points captured by the image sensor at said predetermined distance, and (b) an average coordinate of the images of the two auxiliary points captured by the image sensor from said predetermined distance, the processing and storage unit is further configured to adjust a moving sensitivity of the aiming point during operation based on at least an adjustable scale parameter, and the aiming point is at least one of a spot projected by a projector, a bullet drop point projected by a light gun, or a cursor controlled by a mouse.