Patent ID: 6910778
Filing Date: 2005-06-28
Classification: G02B

Abstract:
1. A presentation system using a laser pointer, comprising: a screen device; a projecting device for projecting a visible image generated by a computer onto the screen device; and a laser pointer operated by a user, and projecting a laser beam onto the screen device, the laser pointer comprising: an infrared light emitting device for emitting an infrared light approximately in the same direction as a projection direction of the laser beam; and a switching device for switching the mode between a laser pointer mode for projecting the laser beam and a mouse mode for emitting the infrared light from the infrared light emitting device, the presentation system further comprising: an infrared light sensing device for sensing a projected image of the infrared light emitted from the infrared light emitting device to the screen device; and a processing section for generating movement data consisting of a movement direction and a movement distance of the projected image of the infrared light sensed by the infrared light sensing device, and for supplying the movement data to the computer; wherein a projecting device projects a visible image onto the screen device based on the movement data supplied from the computer.