Light modulating unit and image projection apparatus

Details Light modulating unit and image projection apparatus Light modulating unit and image projection apparatus

2007-09-18

2007-09-18

Mahoney, Christopher (Department: 2851)

Optics: image projectors

Polarizer or interference filter

C353S031000

Reexamination Certificate

active

11053517

ABSTRACT:
A light modulating unit includes first and second light modulating sections each of which modulates an illumination light on the basis of a video signal to generate a projection light that is a linearly polarized light, a light path synthesizing section which synthesizes the projection lights generated by the first and second light modulating sections using the nature that directions of polarizations of the projection lights cross at right angles, and a beam shifting section which sets beams of the projection lights synthesized by the light path synthesizing section, in a shifted state or a non-shifted state on the basis of the directions of polarizations of the projection lights, the beam shifting section switching the shifted state and the non-shifted state synchronously with modulation timings for the first and second light modulating sections.

REFERENCES:
patent: 6972809 (2005-12-01), Nakanishi
patent: 7021766 (2006-04-01), Uehara
patent: 7-52262 (1995-06-01), None
patent: 10-304284 (1998-11-01), None
patent: 2002-268014 (2002-09-01), None

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