Projector with flat light sources

Details Projector with flat light sources Projector with flat light sources

2006-11-07

2006-11-07

Mack, Ricky L. (Department: 2873)

Optical: systems and elements

Lens

With field curvature shaping

C359S618000, C353S020000, C353S031000, C353S037000

Reexamination Certificate

active

07133211

ABSTRACT:
Optical system designs for projectors using flat light sources are disclosed. These projectors make use of imagers that manipulate the transmission or reflectance of light through electronically controlled pixels. The optical systems of the invention employ a rectangular flat light source that is matched to the aspect ratio of the imager itself, thus enabling very efficient use of light. Several flat light sources are possible for this projection system, including flat fluorescent lights and field emission light sources. Collimation of these light sources is an option. Polarization conversion means is also disclosed for such flat light sources, so that the light output is almost totally linearly polarized. Such projection systems can be very compact.

REFERENCES:
patent: 6036318 (2000-03-01), Itoh
patent: 6257728 (2001-07-01), Bergman et al.
patent: 6262851 (2001-07-01), Marshall
patent: 6795249 (2004-09-01), Shioya

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