Patent ID: 6505957
Filing Date: 2003-01-14
Classification: H04N

Abstract:
An illuminating apparatus adapted to supply input light to a light-processing unit of a projection display, said illuminating apparatus comprising:a lighting unit including a plurality of lamp bases, each of which is operable so as to generate forwardly directed light rays, and each of which includes a parabolic reflector and a lamp mounted in said reflector; a lens unit adapted to be disposed between said lighting unit and the light-processing unit so as to receive the forwardly directed light rays from each of said lamp bases; and a light integrator having an input side facing said lens unit so as to receive the light rays that pass through said lens unit, and an output side adapted to face the light-processing unit, wherein the light rays that are received from said lens unit are radiated by said light integrator as an evenly distributed light source at said output side for reception by the light-processing unit; said lens unit including a positive first lens proximate to said lighting unit, and a negative second lens proximate to said light integrator, said first lens refracting the light rays from said lamp bases to result in converging light rays upon exiting said first lens, said second lens refracting the light rays from said first lens such that the light rays are radiated in parallel upon exiting said second lens; said light integrator including a lens array integrator adapted to be disposed between said second lens and the light-processing unit.