Illuminating device and projection type video display

Details Illuminating device and projection type video display Illuminating device and projection type video display

2007-03-27

2007-03-27

O'Shea, Sandra (Department: 2875)

Illumination

Plural light sources

With modifier

C362S019000, C362S017000, C362S227000

Reexamination Certificate

active

10998969

ABSTRACT:
Each light path changing member forms a first light flux by reflecting a half of light flux emitted from a particular area (central area or peripheral area) of light source in one direction using a polarizing beam splitter, and forms a second light flux by reflecting the other half of light flux, which has passed through the beam splitter, in the afore-mentioned direction using the first mirror. Then, each light path changing member transmits a half of a light flux emitted from the other light source and guided by the second mirror in the same direction as that in which the first light flux has been guided using the polarizing beam splitter, and superposes the light flux on the aforementioned first light flux, and reflects the other half of light flux, which has been reflected by the beam splitter, in the aforementioned direction using the first mirror, and superposes the light flux on the second light flux.

REFERENCES:
patent: 6392740 (2002-05-01), Shiraishi et al.
patent: 6697197 (2004-02-01), Sedlmayr
patent: 1 107 611 (2001-06-01), None
patent: 1 107 611 (2001-06-01), None
patent: 07225430 (1995-08-01), None
patent: 2001-021996 (2001-01-01), None
patent: 2001-21996 (2001-01-01), None
European Office Action dated May 31, 2006.

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