Patent ID: 6307675
Filing Date: 2001-10-23
Classification: G03B

Abstract:
A rear-projection screen for which a projection side is defined as a rear side, and an observation side is defined as a front side, comprising:a first lenticular portion having a plurality of cylindrical lenses extending in a first direction and juxtaposed in a second direction perpendicular to the first direction;a first substrate disposed on the front side of said first lenticular portion, said first substrate having a thickness of 0.5 to 3 mm, a total light transmittance Tt1 of 75 to 95%, a diffusion transmittance Dt1 of 40 to 70%, and a haze value H1 of 50 to 80;a Fresnel lens disposed on the front side of said first substrate;a second lenticular portion disposed on the front side of said Fresnel lens, said second lenticular portion having a plurality of cylindrical lenses extending in the second direction and juxtaposed in the first direction;a second substrate disposed on the front side of said second lenticular portion, said second substrate having a thickness of 0.05 to 0.3 mm;a light-shielding stripe layer disposed on the front side of said second substrate, said light-shielding stripe layer having a plurality of light-shielding bands extending in the second direction and juxtaposed in the first direction at an interval; anda third substrate disposed on the front side of said light-shielding stripe layer to come into contact with said light-shielding stripe layer, said third substrate having a thickness of 0.5 to 3 mm,wherein said second and third substrate, when combined, have a total light transmittance Tt2 of 75 to 95%, a diffusion transmittance Dt2 of 0 to 40%, and a haze value H2 of 0 to 50, to satisfy Tt1/Tt2=0.8 to 1.2, Dt1/Dt2.gtoreq.1, and H1/H2.gtoreq.1.