Patent ID: 6982767

Claim:
A liquid crystal projector comprising: a light source for irradiating a luminance light; a polarizing optical system for transforming said luminance light in a first linearly polarized light; a color separating optical system for separating said first linearly polarized light to first-third primary color linearly polarized light beams; a first liquid crystal light valve for modulating said first primary color linearly polarized light to produce a first primary color image, in performing the white dot display said first linearly polarized light being transformed into a second linearly polarized light which exits from said first liquid crystal light valve, and in performing the black dot display said first linearly polarized light, exiting from said first liquid crystal light valve, a polarization direction of said second linearly polarized light being perpendicular to that of said first linearly polarized light; second and third liquid crystal light valves for modulating said respective second color linearly polarized light and third primary color linearly polarized light to produce a second primary color image and a third primary color image, in performing the white dot display said first linearly polarized light exiting from said second and third liquid crystal light valves, and in performing the black dot display said first linearly polarized light being transformed into said second linearly polarized light which exits from said second and third liquid crystal light valves; a composing optical system for composing said first, second and third primary color images by transmitting or reflecting said first primary color image and reflecting or transmitting said second and third primary color images; and a projecting lens for projecting said composed color image.