Patent ID: 6970289

Claim:
A rear projection screen for use with a projection lens which has an exit pupil (the â€œprojection lens' exit pupilâ€), said screen having a light entering side and a light exiting side and comprising in order from said light entering side to said light exiting side: (a) a Fresnel structure; (b) a lenslet array; and (c) an opaque layer comprising a plurality of holes, said holes being at locations which correspond to the images of the projection lens' exit pupil formed by the combination of the Fresnel structure and the lenslet array, wherein: (i) the screen is for use with a pixelized panel and the lenslet array comprises elements whose size is at least several times smaller than the magnified image of a pixel produced at the array by the projection lens: or (ii) the screen is for use with a cathode ray tube and the lenslet array comprises elements whose size is at least several times smaller than the magnified image of a dot spot of the cathode ray tube produced at the array by the projection lens.