Patent ID: 7350952
Filing Date: 2008-04-01
Classification: G02B

Abstract:
1. An illumination system for display device, comprising: a tube shaped reflector having a tube-shaped wall whose inner surface is reflective, the wall including an aperture extending along a longitudinal axis of the reflector; plural sets of LEDs arranged on the tube-shaped wall in the reflector, colors of light to be emitted from the LEDs in each of the sets being different, the LEDs in each of the sets being arranged along the longitudinal axis of the reflector to form a linear light source; and a collecting lens fixed to the reflector in such a way as to fill the aperture of the reflector, wherein the LEDs in a first one of the sets are apart from the LEDs in a second one of the sets at a first distance in a circumferential direction of the reflector; and the LEDs in the second one of the sets are apart from the LEDs in a third one of the sets at a second distance alone the circumferential direction, where the second distance is equal to the first distance.