Patent ID: 7296898

Claim:
An image projector having a light emitting diode (LED) light source, the image projector comprising: an optical engine for projecting an image, the optical engine having a LED for producing the light needed for the projection of the image; a printed circuit board (PCB) module coupled to the optical engine to control the projection of the optical engine, the PCB module comprising: a first PCB; a second PCB which is set-up in parallel to the first PCB; at least one connecting interface for connecting an exterior device; and a control unit, coupled to the at least one connecting interface, for processing image data received from the at least one connecting interface and transferring the processed image data to the optical engine; a heat sink module for dissipating the heat generated by the optical engine and the PCB module, the heat sink module comprising a heat dissipating fan, an entrance airway, and an exit airway, which build into a heat dissipating route that starts from the entrance airway then passes through the heat dissipating fan and then ends at the exit airway, and the LED and the control unit are positioned on the heat-dissipating route; a operation interface module, coupled to the PCB module, for controlling the operation of the image projector; and a supporting frame utilized to contain and position the optical engine, PCB module, heat-dissipating module and operation interface module; wherein the first PCB and the second PCB horizontally overlaps each other, the size of the first PCB is smaller than that of the second PCB, the heat dissipating fan is located on the area on the second PCB that does not overlap with the first PCB.