Patent ID: 6811261
Filing Date: 2004-11-02
Classification: H04N

Abstract:
A projection display apparatus for use with an object to be projected, comprising:a light source that projects light onto the object to be projected; a polarizing unit that polarizes the light emitted from the light source; a color-separation unit that divides the light polarized by the polarizing unit into a plurality of colors; a plurality of liquid crystal panels that respectively modulate the plurality of colors divided by the color-separation unit; a color-combining unit that combines the plurality of colors respectively modulated by the plurality of liquid crystal panels so as to generate composite light including the plurality of colors, whereby the composite light comprises at least one of first light rays and second light rays; a polarization separator that separates the first light rays, which are included in the composite light generated by the color-combining unit and modulated by the liquid crystal panels, from the second light rays, which are modulated by the liquid crystal panels, by allowing the first light rays to pass therethrough while reflecting the second light rays therefrom; and a projecting unit that projects the first light rays separated by the polarization separator onto the object to be projected, the polarization separator being formed by a first reflection polarizing member disposed so as to face the color-combining unit and a second absorption polarization member disposed so as to face the projecting unit.