Projection display

摘要

The present invention provides an inexpensive projection display that allows a pixel grid as ineffective portions of respective pixels of a light valve to be made inconspicuous. The projection display includes a birefringent element ( 43 ) for spatially separating light from a transmission liquid crystal light valve ( 39 ). The birefringent element ( 43 ) includes a first birefringent plate ( 40 ) that the light from the liquid crystal light valve ( 39 ) enters, a second birefringent plate ( 41 ) that light from the first birefringent plate ( 40 ) enters, and a third birefringent plate ( 42 ) that light from the second birefringent plate ( 41 ) enters. A polarization direction of the light entering the first birefringent plate ( 40 ) forms an angle of nx45° (n is an integer other than 0) with an optic axis of the first birefringent plate ( 40 ) projected on an incident surface of the first birefringent plate ( 40 ). An optic axis of the second birefringent plate ( 41 ) projected on an incident surface of the second birefringent plate ( 41 ) is orthogonal to the optic axis of the first birefringent plate ( 40 ) projected on the incident surface of the first birefringent plate ( 40 ). An optic axis of the third birefringent plate ( 42 ) projected on an incident surface of the third birefringent plate ( 42 ) extends horizontally or vertically.