Patent ID: 7635187
Filing Date: 2009-12-22
Classification: G03B,H04N

Abstract:
1. An image display device comprising: an illumination system including a light source that emits light; a polarization separating system which separates the light emitted from the illumination system according to a polarization direction; plural color separation systems which are provided in relation to the illumination system, and each of which separates each of lights generated by the polarization separating system into plural basic color lights; plural spatial light modulators which are provided corresponding to the color separation systems, and each of which light-modulates the plural basic color lights generated by the color separation system respectively according to image signals, the plural spatial light modulators having a similar construction to act on light of a same polarization; plural color synthesizing systems which are provided corresponding to the color separation systems, and each of which synthesizes the basic color lights modulated by the spatial light modulator; a polarization synthesizing system which synthesizes the lights generated respectively by the plural color synthesizing systems; a projection system which projects the light generated by the polarization synthesizing system on a projection surface; a first polarization converting element which is provided for a light incident part of a first color separation system of the plural color separation systems, and converts the light polarization direction of the light incident on the first color separation system such that the plural basic color lights supplied to each of the plural spatial light modulators is of the same polarization; and a second polarization converting element which is provided for a light exit part of a second color synthesizing system of the plural color synthesizing systems, corresponding to a second color separation system different from the light incident part of the first color separation system, and converts the light polarization direction.