A lighting apparatus and projection display apparatus using the same are
disclosed. The present invention includes a plurality of light sources
emitting lights, respectively, each transmitting at least one of a light
emitted from a different light source and a light having transmitted
through the different light source and a light guiding unit sending the
lights emitted from the light sources and the light transmitted through
the light sources in one direction. Accordingly, the lighting apparatus
can minimize the etendue to provide sufficient intensity of light despite
a plurality of the light sources. By eliminating the necessity for the
color separating/synthesizing unit using the lighting apparatus or by
eliminating the necessity for the integrator using the lighting apparatus
having the long reflecting member, the projection display system can be
implemented with a simple configuration.