Bi-stable projection screen

Optical: systems and elements – Projection screen

Reexamination Certificate

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Details

C359S452000, C359S453000, C359S460000

Reexamination Certificate

active

07839568

ABSTRACT:
A bi-stable projection screen includes a light diffusion unit and a bi-stable display unit stacked together. The bi-stable display unit, when actuated, selectively operates in a first mode or a second mode. When operating in the first mode (e.g., a transmission mode or a reflection mode), the bi-stable display unit receives a projection light from a front projection or a rear projection, and emits the projection light after modulation. When operating in the second mode (a non-transmission mode or a non-reflection mode), the bi-stable display unit is a pattern to become a part of a scene. The light diffusion unit receives and diffuses the modulated projection light to be perceived by human eyes.

REFERENCES:
patent: 5416617 (1995-05-01), Loiseaux et al.
patent: 6147801 (2000-11-01), Goldenberg et al.
patent: 6483643 (2002-11-01), Zuchowski
patent: 6726335 (2004-04-01), Yaniv et al.
patent: 6943947 (2005-09-01), Adachi et al.
patent: 2002/0093607 (2002-07-01), Van De Ven et al.
patent: 2008/0158449 (2008-07-01), Daverman et al.

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