Optics: image projectors – Cabinet encloses projector and one side of screen – Reflector between lamp and screen
Reexamination Certificate
2007-03-29
2010-12-28
Ko, Tony (Department: 2878)
Optics: image projectors
Cabinet encloses projector and one side of screen
Reflector between lamp and screen
C353S078000, C353S099000, C359S651000
Reexamination Certificate
active
07857463
ABSTRACT:
A micro-mirror based projection display system in an enclosure with minimum chin and depth measurements is disclosed. A solid-state laser light source generates light of multiple primary colors that is modulated by a digital micro-mirror device. The projection optics of the system include a telecentric rear group of glass lenses with spherical surfaces, followed by a pair of aspheric lenses formed of plastic. A folding mirror is disposed between the aspheric lenses, to reduce the depth of the enclosure, and an aspheric mirror projects the image onto a TIR Fresnel projection screen. The aspheric lenses are magnifying, to reduce the magnification required of the aspheric mirror, and the aspheric lenses and mirror are clipped to reduce enclosure volume.
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Brady III Wade James
Ko Tony
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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