Patent ID: 6017123
Filing Date: 2000-01-25
Classification: H04N

Abstract:
In a projection system including first and second light valve projectors which project a composite image onto a screen by overlapping first and second images in an overlap region, each projector including a light source, a light valve for reflecting or transmitting image light, a condensing lens for directing light from said light source to said light valve, and a projection lens, an improved fight valve projector comprising:blending means, associated with said first and second light valve projectors and being located in the path of said light between one of said light valve and said projection lens, said light source and said condensing lens, and said projection lens and said screen, said blending means for smoothing off-state and on-state illumination levels in said overlap region without reducing the contrast ratio of said light valve projector, said blending means comprising a mask having a tapered edge, said mask being located in the path of said light.