Projection display apparatus

A projection display apparatus, comprising: a first display substrate having the polarization beam splitter opposite to the first surface and a second surface, and a projection lens the light recovery means; wherein said first polarization beam splitter for transmitting a type of parallel polarized light and reflects the second type of polarized light parallel; recovery means for the first light carries the second image information is converted via a first type of polarized light parallel to the polarization beam splitter is transmitted two types of polarized light parallel, and such that the second type of polarized light parallel to the second image information is carried in the backward direction transmission to the second surface of the polarization beam splitter. The present invention improves the efficiency of light intensity, may be used for three-dimensional display.