Color liquid crystal projector having an improved optical system

摘要

A color liquid crystal projector has an optical system for color splitting. The optical system includes a mirror (3) for reflecting a first primary-color light and transmitting second and third primary-color lights in light from a light source; a first phase plate (6) for transmitting the second primary-color light from the mirror with its polarization degree rotated through 90°, and for transmitting the third primary-color light; a first prism (9) for transmitting the second primary-color light from the first phase plate into a second liquid crystal display panel (DR), and reflecting the third primary-color light from the first phase plate into a third liquid crystal display (DG) panel; a second prism (4) for entering the first primary-color light from the mirror into a first liquid crystal display panel (DB); and a dichroic prism (5) for combining the first, second and third primary-color lights reflected from the liquid crystal display panels.