Patent ID: 8130331
Filing Date: 2012-03-06
Classification: G02B,G03B,H04N

Abstract:
1. A projection-type display apparatus, comprising: a light source; an illumination optical system that condenses light from the light source, and forms a light beam for the right eye and a light beam for the left eye, the light beams entering an illumination area at different angles from each other; a color separating element that separates the light beams from the illumination optical system into a blue light beam, a green light beam, and a red light beam; three liquid crystal light valves that receive the light beams of the respective colors for the right eye and for the left eye that are separated by the color separating element, and form image lights for the right eye and for the left eye according to video signals for the right eye and for the left eye; a color combining element that receives the image lights for the right eye and for the left eye exiting from the liquid crystal light valves, and combines the blue, green, and red light beams; a wavelength-selective polarization rotating element that rotates a polarization direction of a light beam of a predetermined color from among the light beams combined by the color combining element so as to align the polarization direction with that of a light beam of another color; and a projection lens that magnifies and projects a light that has passed through the wavelength-selective polarization rotating element, wherein each of the liquid crystal light valves comprises the projection lens comprises a polarized light separating element that causes polarization directions of the image light for the right eye and the image light for the left eye to be orthogonal to each other.