Patent ID: 7036941
Filing Date: 2006-05-02
Classification: H04N

Abstract:
1. A projector, comprising: a light modulator modulating an incoming light flux in accordance with image information, and including a rectangular image formation region to form an optical image; a light source device including a light-emitting tube, an elliptical reflector to reflect a light emitted from the light-emitting tube, and a collimator lens to collimate a light flux reflected by the elliptical reflector, a light flux dividing optical element in which a plurality of small lenses are structured in a matrix to divide the light flux emitted from the light source device into a plurality of partial light fluxes; and a condenser to superpose partial light fluxes formed as a result of division by the light flux dividing optical elements, on the image formation region of the light modulator, the collimator lens being placed at a position where a diameter of the light flux reflected by the elliptical reflector is equal to or longer than a short side dimension of the image formation region, but equal to or shorter than a long side dimension of the image formation region, and an effective light flux passing region of the light flux dividing optical element and the condenser being both set to be rectangular where their sides are equal to or longer than the short side of the image formation region, but equal to or shorter than the long side dimension of the image formation region.