BACK PROJECTION-TYPE SCREEN AND BACK PROJECTION-TYPE PROJECTION DEVICE

摘要

A back projection-type screen and a back projection-type projection device, in which contrast is enhanced, unevenness of an external light absorption layer is reduced, moiré trouble is suppressed, damage due to contact between sheets is suppressed, and the entire projection device can be reduced in size and weight. The back projection-type screen is the so-called oblique projection system where the optical center of a Fresnel lens sheet (7) is located at a position outside a display screen area, above or blow the screen. The lens array (12) of a lenticular lens sheet (1) is arranged substantially in the vertical direction. Moiré can be reduced by setting the pitch of Fresnel lens and the lens pitch of the lenticular lens sheet within a predetermined range.