Patent ID: 6705730
Filing Date: 2004-03-16
Classification: H04N

Abstract:
A display comprising:a projector including a light source extending at least one-dimensionally or two-dimensionally, an illumination lens through which a luminous input flux emitted from the light source passes, a light valve for modulating the luminous input flux passed through the illumination lens, and a projection lens for projecting the luminous input flux modulated at the light valve; and a screen for displaying a projected image projected by the projection lens of the projector, wherein the light valve is positioned between the illumination lens and a focus point of the illumination lens deviation range of Â±25% away from the focus point, and wherein in the case where the area of the light source is large, satisfying the relationship of the following expression (7): W>1.2f/Fnâ€ƒâ€ƒ(7) where Fn denotes the F-number of the projection lens, f denotes the focal length of the illumination lens, and W denotes the diameter of the light source, the light source is positioned at a distance in the range of from zero to 3.5 times the focal length f of the illumination lens away from the illumination lens.