Patent ID: 7566134
Filing Date: 2009-07-28
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 emits the modulated light; an illumination optical system that condenses light emitted by the light source and illuminates the spatial light modulation element with the condensed light; a projection lens that projects light emitted from the spatial light modulation element; a shielding unit, positioned on either an illumination optical system side of the spatial light modulation element or a projection lens side of the spatial light modulation element, that varies an amount of shielding of light transmitted through the shielding unit to change an angular distribution of light emitted by the spatial light modulation element; an image signal correction unit that divides a picture plane of the spatial light modulation element into a plurality of areas and performs, for each of the plurality of areas, uniformity correction on the image signal applied to the spatial light modulation element in accordance with a current level of shielding by the shielding unit; and a three-dimensional correction unit that supplies, to the image signal correction unit, three-dimensional interpolation data C (X, Y, Z) for a level Z image signal at an arbitrary pixel G (X, Y) of the spatial light modulation element, the image signal correction unit performing the uniformity correction using the three-dimensional interpolation data C (X, Y, Z), the three-dimensional correction unit including: