TRANSMISSION TYPE SCREEN AND ITS MANUFACTURING METHOD, AND BACK PROJECTION TYPE IMAGE DISPLAY DEVICE USING THE SAME

摘要

PROBLEM TO BE SOLVED: To reduce external light reflection without increasing the number of constitution sheets even when a flat plate type front protection sheet is installed. SOLUTION: The front protection sheet 2 has a plane screen surface as its video light projection surface 5 and also has a plane surface as its video light incidence surface 6 as well. A front sheet 4 is formed by uniting the front protection sheet 2 and a lenticular lens sheet 1 and a screen has the two-sheet constitution of the front sheet 4 and a Fresnel lens sheet 3. The lenticular lens sheet 1 has its video light incidence surface 8 formed by arraying many vertically long lenticular lenses successively in the horizontal direction and its video light projection surface 7 formed by arraying vertically long lenticular lenses and vertically long light absorption zones 11 of finite width alternately; and the light absorption zones 11 are stuck on the video light incidence surface 6 of the front protection sheet 2.