Projection display device

Details Projection display device Projection display device

2008-10-02

2011-11-15

Dowling, William C (Department: 2878)

Optics: image projectors

Polarizer or interference filter

C359S486010

Reexamination Certificate

active

08057044

ABSTRACT:
In a projection display device, a polarization converting element is provided between an imager and a refracting optical system for converting a polarization direction of light after modulation into a direction radially extending from the center of the optical axis of the refracting optical system. Light transmitted through the polarization converting element is incident onto the refracting optical system in a state of P-polarized light or a state close to the state of P-polarized light. Thereby, the transmittance of light through the refracting optical system is made substantially uniform and increased.

REFERENCES:
patent: 6604829 (2003-08-01), Rodriguez, Jr.
patent: 7360899 (2008-04-01), McGuire et al.
patent: 7374291 (2008-05-01), Kurioka
patent: 2008/0137189 (2008-06-01), Shih
patent: 2003-121811 (2003-04-01), None
Sunao, Takeuchi; JP2003-121811; Machine Translation in English.
Sunao, Takeuchi; JP2003-121811; Machine Translation in English; Apr. 23, 2003.

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