Abstract: The present invention discloses a remote controllable image display system, and a controller and a motion detection method for use in the system. The system includes: an image display showing images generated by a program; a light source generating at least a light beam; a controller controlling a current image according to its displacement or rotation and including at least one image sensor sensing the light beam to obtain a first frame having at least two light spots; a processor obtaining a first angle between a main operation surface of the controller and a basis plane according to the differences between the coordinates of the two light spots in the first frame.

Abstract: The present invention discloses an object tracking apparatus, an interactive image display system using the object tracking apparatus, and methods thereof. The object tracking apparatus generates a control signal inputted to an image display apparatus to display an image in response to an action of an object. The object tracking apparatus includes: an image sensor device, which detects a predetermined pattern displayed by the image display apparatus to generate a sensed image; a coordinate information generation circuit, which generates coordinate information according to the sensed image; and a processing circuit, which generates a predetermined image data based on which the predetermined pattern is generated, wherein the processing circuit compares the coordinate information with the predetermined image data to generate a correction value.