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

摘要

Seeking the improvement of the contrast, and low non-uniformity in the external light-absorbing layer, and suppress the moire disorders, and suppressing the generation of scratches due to the contact between the sheet and further reduce the size of the total projection device, a rear projection-type screen and a back that can be light-weight to provide a projection type projection apparatus. The rear projection type screen according to the present invention, a so-called oblique projection system, the optical center of the Fresnel lens sheet (7), standing out the display region is formed on the upper or lower side of the screen. Thermal lens 12 of the lenticular lens sheet (1) is substantially arranged in the vertical direction. At this time, by the pitch and the lenticular lens of the lens pitch of the Fresnel lens sheet to a predetermined range, it is possible to reduce a moire. ; Rear-projection screen, a Fresnel lens, a lenticular lens, and external light-absorbing layer, the microlens array