Patent ID: RE43743

Claim:
A projection-type image display apparatus including: a light source emitting light rays; a color separation unit separating the rays incident thereon according to predetermined ranges of wavelengths, and directing the separated incident rays at angles different from each other; a lens array dividing the rays separated by the color separation unit into predetermined pixel rays and converging the pixel rays individually; a driving portion driving the lens array to change the proceeding paths of the separated rays incident on the lens array from the color separation unit; a polarizing beam splitter changing a proceeding path of the converged pixel rays depending on a direction of polarization by passing first polarized rays of the incident pixel rays from the lens array, and reflecting second polarized rays of the incident pixel rays from the lens array; a reflection-type display device having pixels producing at least one color image using the first and/or second polarized rays having passed through and/or having been reflected from the polarizing beam splitter, and reflecting the color image toward the polarizing beam splitter; a lens unit, provided in the optical path between the lens array and the display device, converging and projecting the first and second polarized rays onto the display device, said lens unit comprising: a first converging lens provided in an optical path between the lens array and the polarizing beam splitter, converging the pixel rays having passed through the lens array; and a second converging lens provided in an optical path between the polarizing beam splitter and the display device converging incident pixel rays from the beam splitter; and a projection lens unit magnifying and projecting the color image formed by the display device and through the polarizing beam splitter onto a screen.