Optically transmissive substrates and light emitting assemblies and methods of making same, and methods of displaying images using the optically transmissive substrates and light emitting assemblies

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United States of America Patent

PATENT NO 8462292
APP PUB NO 20100026703A1
SERIAL NO

12504236

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Images are displayed in response to a video signal using a light emitting assembly having one or more optically transmissive substrates, films or sheets, each having at least one pattern of optical elements on or in the substrates, films or sheets. A plurality of light sources are configured to illuminate one or more output areas of one or more of the substrates, films or sheets. The light emitting assembly is configured to emit light through the pattern of optical elements and produce a predetermined luminance profile of the light emitting assembly. At least one of the light sources is dimmed or boosted in response to an input video signal while operating a liquid crystal display as a light valve to illuminate the liquid crystal display by the light emitting assembly. At least some adjacent substrates, films or sheets may have portions that overlap, and at least one pattern of optical elements on or in at least one side of the substrates, films or sheets may be configured so that discontinuities between the adjacent substrates, films or sheets are minimized. A predetermined light output from the light emitting assembly may be produced by varying the electrical input to at least some of the light sources.

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Patent Owner(s)

  • RAMBUS DELAWARE LLC

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hide, Fumitomi San Jose, US 1 6
McCollum, Timothy A Thurmont, US 76 2146
Parker, Jeffery R Richfield, US 156 7418

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