SHEET FOR TRANSMISSIVE SCREEN AND TRANSMISSIVE SCREEN USING SHEET FOR IMPROVING QUALITY AND REDUCING COST BY CONTINUOUSLY AND SLOWLY VARYING HEIGHT OF LENS

摘要

PURPOSE: A sheet for a transmissive screen and the transmissive screen using the sheet are provided to reduce the manufacturing cost of the transmissive screen, and to form the stable shape of the lens by continuously and gradually varying the grooves with thermoplastic resin with the specific pressure dependency. CONSTITUTION: Plural lenses are formed on the surface of a transmissive screen sheet and creased variously. Grooves are varied continuously and gradually, and the thickness of the crease is 0.1 to 2.0 mm. The melt viscosity of the screen sheet is 100 to 1000 Pa*s, and the screen sheet is formed of thermoplastic resin. The gradient from the relation between the melt viscosity and the load is 2*1/100 to 6*1/100. The height of the lens is varied continuously from the center to the peripheral part.