Color projection type display apparatus having three liquid displays of same structure

A projection type display apparatus, comprising:

• a polarized light source for emitting a third linearly polarized light composed of a first and a second linearly polarized lights, including
• light converging means for converging exit light rays from a lamp and converting the exit light rays into forward exit light rays;
• polarization beam splitter means for separating the forward exit light rays into first and second linearly polarized lights;
• deflection means for deflecting one of the first or second linearly polarized lights to a direction substantially the same as that of the other linearly polarized light;
• and
• a first polarized light rotation means including a first phase plate for rotating the polarization direction of one of the first or second linearly polarized lights through 90 degrees;
• spectroscope means including a dichroic mirror for separating a third linearly polarized light emitted from said polarized light source into red, green, and blue light rays;
• image display elements for performing light modulation in response to an image signal of red, green, or blue color, said image crystal display elements including first and second polarizing plates and a liquid crystal cell interposed between said first and second polarizing plates;
• second polarized light rotation means including a second phase plate for rotating the polarization direction of the third linearly polarized light through 90 degrees such that the polarization direction of the third linearly polarized light is made to coincide with that of said first polarizing plate, said second phase plate being arranged with an optical axis of the second phase plate being opposite to the optical axis of the first phase plate in direction;
• and
• a projection lens for enlarging and projecting an image from said image display elements.