Display apparatus using LCD panel

Details Display apparatus using LCD panel Display apparatus using LCD panel

2007-03-13

2007-03-13

Koval, Melissa J. (Department: 2851)

Optics: image projectors

Polarizer or interference filter

C353S094000, C353S102000, C349S009000

Reexamination Certificate

active

11120340

ABSTRACT:
A projection apparatus has an illumination section that provides first, second, and third light sources for providing first, second, and third illumination beams. First, second, and third component wavelength modulating sections modulate the corresponding illumination to provide first, second, or third modulated component wavelength beams respectively. Each component wavelength modulating section uses a portion of a monochrome transmissive liquid crystal modulator panel that has been segmented into at least a first, second, and third portion. A component wavelength polarizer in the path of the component wavelength illumination directs substantially polarized light to the corresponding portion of the monochrome transmissive liquid crystal modulator panel. An illumination path Fresnel lens focuses incident illumination from the component wavelength polarizer through the corresponding portion of the monochrome transmissive liquid crystal modulator panel. An analyzer conditions the polarization of the modulated component wavelength beam. A lens forms an image for projection onto a surface.

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Dewald et al.; “Sequential Color Recapture and Dynamic Filtering: A Method of Scrolling Color” SID 01 Digest, pp. 1076-1079.

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