Patent ID: 8390774

Claim:
A projection display apparatus for projecting light that is modulated based on an image signal by a liquid crystal panel, the projection display apparatus comprising: a first polarizing layer provided on an optical path of light entering the liquid crystal panel; a second polarizing layer provided on an optical path of light exiting the liquid crystal panel; a third polarizing layer provided on an optical path of light exiting the liquid crystal panel, between the liquid crystal panel and the second polarizing layer; and first through third compensation layers provided between the first and second polarizing layers, wherein a transmission axis of the first polarizing layer intersects a transmission axis of the second polarizing layer at right angles, wherein the transmission axis of the second polarizing layer is parallel to a transmission axis of the third polarizing layer, wherein the first compensation layer compensates for a phase difference caused by an incidence-side pre-tilt angle of the liquid crystal panel, wherein the second compensation layer compensates for a phase difference caused by an exit-side pre-tilt angle of the liquid crystal panel, wherein the third compensation layer compensates for a phase difference due to a deviation between a polarization axis of light entering the third polarizing layer and the transmission axis of the third polarizing layer, and wherein the third compensation layer is located in an exit side of the light exiting the liquid crystal panel.