Patent ID: 7374290
Filing Date: 2008-05-20
Classification: G03B,H04N

Abstract:
1. A projection-type display device, comprising: a light source; a spatial light modulation element that modulates incident light according to an applied image signal and that emits the modulated light; an illumination optical system that condenses light from said light source and that illuminates said spatial light modulation element; a projection lens that projects light emitted from said spatial light modulation element; shielding means that is positioned along a path of light on a side of either said illumination optical system or said projection lens with respect to said spatial light modulation element and that varies an amount of shielding of transmitted light; and image signal correction means that divides a picture plane of said spatial light modulation element into a plurality of areas and that performs a three-dimensional correction on said image signal applied to said spatial light modulation element in accordance with a current shielding amount of said shielding means for each of said plurality of areas; wherein the three-dimensional correction includes a white balance adjustment and a gamma correction.