Optics: image projectors – Distortion compensation
Reexamination Certificate
2006-09-05
2006-09-05
Koval, Melissa Jan (Department: 2851)
Optics: image projectors
Distortion compensation
C353S007000, C353S008000, C353S122000, C349S011000, C359S013000, C359S462000, C359S478000, C359S630000, C345S008000
Reexamination Certificate
active
07101048
ABSTRACT:
A flat-panel projection display comprises a slab waveguide having a preferably embossed diffraction grating on one face, a lens for directing light into an edge of the waveguide, and in the focal plane of the lens a liquid-crystal modulator for modulating the intensity of the light as a function of lateral position and elevational direction of travel. The light is ejected from the slab waveguide by the grating at angles corresponding to the input angles, giving a virtual display. The light from the modulator can be expanded in one dimension by passing through a magnifying waveguide, followed by scattering in the plane by a screen and projection by a lens at the other end of the waveguide. Head-up and 3-D displays can be constructed using this principle.
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Cambridge Flat Protection Displays Limited
Koval Melissa Jan
Young & Basile P.C.
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