Patent ID: 7807957

Claim:
A projection display apparatus comprising: an arc type lamp for emitting a light beam having an illumination intensity distribution including a light emitting part and a light reflecting part, reflectors for reflecting of the light reflecting part the light beam from the arc type lamp, wherein the reflectors are comprised of a first reflector located in front of the lamp and having a revolution paraboloid shape and a second reflector arranged in rear of the lamp and having a spherical shape, for reflecting the light beam from the lamp, a parallelizing lens for parallelizing light beams emitted from the lamp other than those directed to the first and second reflector, and other than light beams reflected by the second reflector, an array lens group comprised of a first and a second array lens, for equalizing the illumination intensity distribution of the light beam from the reflectors, a polarization exchange element comprising a plurality of polarization exchange portions each comprising light shield parts for blocking light beams from the array lens group, aperture parts for allowing the light beams from the array lens group to pass therethrough, a polarized beam splitter film for splitting the light beams from the aperture parts into two kinds of light beams having different polarized directions, a reflection film for reflecting the light beam reflected by the polarized beam splitter film, and a half wave phase difference plate for changing polarized directions of light beams transmitted through the beam splitter film, and for unifying the polarized directions of the light beams, an image display element for modulating the light beams from the polarization exchange element, and a projection lens for projecting the light beams from the image display elements, wherein the longitudinal direction of the light emitting part of the arc type lamp is the same as the longitudinal direction of the aperture parts.