Interlaced image projection apparatus

Details Interlaced image projection apparatus Interlaced image projection apparatus

1996-04-04

1998-03-17

Dowling, William

Optics: image projectors

Polarizer or interference filter

353122, 359495, G03B 2114

Patent

active

057278601

ABSTRACT:
An image projection apparatus which comprises an illumination unit, an image display unit, a projection lens and an electro-optical deflection unit arranged between the display unit and the projection lens and being switchable between a first mode and a second mode and comprising a polarization switch and a birefringent element, whereby the light rays from the display unit passing through the deflection unit if the deflection unit is in the first mode are shifted relative to said light rays passing through the deflection unit if this unit is in the second mode. The birefringent element comprises at least one birefringent oriented polymer layer.

REFERENCES:
patent: 5042925 (1991-08-01), Broer et al.
patent: 5098184 (1992-03-01), Van Den Brandt et al.
patent: 5184248 (1993-02-01), De Vaan et al.
patent: 5467207 (1995-11-01), Fortner et al.
patent: 5537256 (1996-07-01), Fergason
patent: 5601351 (1997-02-01), van den Brandt
patent: 5612797 (1997-03-01), Clarke
patent: 5636912 (1997-06-01), Lee et al.
"A Practical Wobbling Device Using Ferroelectric Liquid Crystals for Realizing High Resolution Projectors", A. Yasuda et al, ASAI Display, 1995, pp. 79-82.

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