Laser local dimming for projectors and other lighting devices including cinema, entertainment systems, and displays

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United States of America Patent

PATENT NO 11683473
SERIAL NO

17477545

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Abstract

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Light from an array of laser light sources are spread to cover the modulating face of a DMD or other modulator. The spread may be performed, for example, by a varying curvature array of lenslets, each laser light directed at one of the lenslets. Light from neighboring and/or nearby light sources overlap at a modulator. The lasers are energized at different energy/brightness levels causing the light illuminating the modulator to itself be modulated (locally dimmed). The modulator then further modulates the locally dimmed lights to produce a desired image. A projector according to the invention may utilize, for example, a single modulator sequentially illuminated or separate primary color modulators simultaneously illuminated.

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Patent Owner(s)

  • DOLBY LABORATORIES LICENSING CORPORATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Richards, Martin J Gig Harbor, US 127 498

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