Patent ID: 6157402
Filing Date: 2000-12-05
Classification: G02B,H04N

Abstract:
A screen assembly for allowing a viewer, having an interpupillary distance E and being located a distance L from an intermediate screen of said screen assembly, to view stereoscopic images displayed on a video display having interlaced scan lines extending in a horizontal direction and interlaced in a vertical direction, where alternating scan lines carry left eye and right eye information, said screen assembly comprising:a first panel having a first set of lenslet rows and a second set of lenslet rows, the first set of lenslet rows being interleaved with the second set of lenslet rows by an offset s.sub.o /2, each lenslet row having a plurality of lenslets, each lenslet having a width s.sub.o in a horizontal direction and a height h.sub.p in a vertical direction, the height h.sub.p corresponding to a height of one scan line of the video display;said intermediate screen disposed a spacing m in a depth direction that is orthogonal to the vertical direction and the horizontal direction, said first panel being disposed between said intermediate screen and the video display, a plurality of dots being formed on said intermediate screen by the lenslets of said first panel focussing the stereoscopic images of the video display, adjacent dots being separated by a spacing s.sub.o '; anda second panel disposed a spacing T in the depth direction and having a first optical transmittance, said intermediate screen being disposed between said second panel and said first panel, said second panel having therein a set of lines having a second smaller optical transmittance, said set of lines (i) having a width w in the horizontal direction, and (ii) being equally spaced from one another in the horizontal direction by a spacing s', dimensions of said screen assembly satisfying the equations:s'=s.sub.o '(1-T/L),T=s.sub.o 'L/(2E),w=s.sub.o /2.