Image projection system with variable display format

Details Image projection system with variable display format Image projection system with variable display format

1996-10-31

1999-11-02

Lee, Michael H.

Television

Video display

Projection device

349 62, 349 5, 353 85, 362281, H04N 574, G02F 100

Patent

active

059780517

ABSTRACT:
An image projector is provided with a light source and a light valve positioned downstream of the light source. An optical path is defined between the light source and the light valve. To accommodate various image viewing formats, a plurality of optical integrators is positioned between the light source and the light valve. Each of the plurality of optical integrators is movable laterally of the optical path and is positionable in the optical path. Light from the light source is transmitted to the light valve through the particular optical integrator positioned in the optical path. Each optical integrator is constructed to produce a unique display format for the light transmitted therethrough to the light valve, in order the accommodate different display formats such as standard and letter-box without wasting light.

REFERENCES:
patent: 5519518 (1996-05-01), Watanabe et al.
patent: 5709463 (1998-01-01), Igram
patent: 5786873 (1998-07-01), Chiu et al.

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