TRANSMISSION SCREEN

• Main Authors: YOSHIMURA OSAMU, ONO YOJI
• Format: Patent
• Language: English
• Published: 13.12.2007
• Subjects: ACCESSORIES THEREFOR; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; CINEMATOGRAPHY; ELECTROGRAPHY; HOLOGRAPHY; PHOTOGRAPHY; PHYSICS

PROBLEM TO BE SOLVED: To provide a transmission screen in which outdoor daylight reflection is reduced, the outdoor daylight reflection causing such a phenomenon that a particular area of the transmission screen is made brighter than the other area thereof due to outdoor daylight reflection. SOLUTION: The transmission screen 1A has a Fresnel lens sheet 2 and a lenticular lens sheet 3, wherein the lenticular lens face 3a of the lenticular lens sheet 3 faces the Fresnel lens sheet 2, light shielding patterns 5 are formed on the non-condensing parts of the lenticular lens on the emission face 3b of the lenticular lens sheet 3, the emission face 3b being opposite side of the lenticular lens face 3a, the condensing part of the lenticular lens 3a is flat in the extending direction of the lenticular lens sheet. A space S (mm) between the lenticular lens sheet 3 and Fresnel lens sheet 2 satisfies S≥1.2×f/n or 0<S≤0.8×f/n (wherein f is the focal distance (mm) of the lenticular lens and n is the refractive index of the lenticular lens). COPYRIGHT: (C)2008,JPO&INPIT