Transmissive screen and rear-projection display device

Details Transmissive screen and rear-projection display device Transmissive screen and rear-projection display device

2007-02-27

2007-02-27

Lee, Diane (Department: 2851)

Optical: systems and elements

Projection screen

Unitary sheet comprising plural refracting areas

C359S460000

Reexamination Certificate

active

10988420

ABSTRACT:
A transmissive screen is provided that controls moire pattern occurrence to prevent the degradation of image quality. The transmissive screen includes a Fresnel lens sheet having a Fresnel lens unit and a microlens array sheet having a microlens unit that are placed opposite to each other. Projected images enter from one side of the screen and are displayed on the other side of the screen, assuming that the lens pitch on one side of the microlens unit is P, the lens pitch of the Fresnel lens unit is Pf, and the pixel-frame pitch projected on the screen is Pb, the following expressions are satisfied: P≠Pb·Pf/(Pb+Pf); P≠Pb·Pf/2×(Pb+Pf); and P≠Pb·Pf/2×(Pb−Pf).

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