Patent ID: 6466375
Filing Date: 2002-10-15
Classification: G02B,H04N

Abstract:
A projection image display apparatus having a plurality of pixels corresponding to a plurality of color rays, comprising:a light source which emits light including a plurality of color rays; light divergence angle limiting means to which light including a plurality of color rays emitted from the light source comes and which limits a divergence angle of at least one of the plurality of color rays so that light rays different from a predetermined light ray do not enter a pixel corresponding to the predetermined color ray; an optical modulating device in which a plurality of pixels corresponding to the plurality of color rays are arranged and which selectively modulates color rays entering the plurality of pixels in accordance with an image to be displayed; and projecting means for projecting each of the color rays optically modulated by the optical modulating device, wherein the divergence angle limiting means comprises: light blocking means which has an optically transparent aperture and blocks light incident on the light blocking means except for the aperture; and a filter which is partially provided at the aperture of the light blocking means and blocks only a predetermined color ray of which divergence angle is to be limited.