High-density illumination system
First Claim
1. An illuminating system, comprising:
- an electrical interconnection system for interconnecting at least one LED chip to a power source;
a plurality of LED chips spaced apart from one another a distance S less than or equal to a width W of said LED chip;
an array of reflecting bins with each of said bins comprising a clear output aperture and a clear input aperture;
a first light redirecting means disposed beyond said array of metallically reflecting bins that transmits light in a first angular range and reflects light in a second angular range back towards said array of bins;
a second light redirecting means disposed beyond said first light redirecting means that transmits light in a first angular range and reflects light in a second angular range back towards said first light redirecting means; and
said array of metallically reflecting bins disposed above said interconnection plate and each of said LED chips extends through a center of the input aperture.
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Accused Products
Abstract
A compact and efficient optical illumination system featuring planar multi-layered LED light source arrays concentrating their polarized or un-polarized output within a limited angular range. The optical system manipulates light emitted by a planar array of electrically-interconnected LED chips positioned within the input apertures of a corresponding array of shaped metallic reflecting bins using at least one of elevated prismatic films, polarization converting films, micro-lens arrays and external hemispherical or ellipsoidal reflecting elements. Practical applications of the LED array illumination systems include compact LCD or DMD video image projectors, as well as general lighting, automotive lighting, and LCD backlighting.
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Citations
20 Claims
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1. An illuminating system, comprising:
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an electrical interconnection system for interconnecting at least one LED chip to a power source; a plurality of LED chips spaced apart from one another a distance S less than or equal to a width W of said LED chip; an array of reflecting bins with each of said bins comprising a clear output aperture and a clear input aperture; a first light redirecting means disposed beyond said array of metallically reflecting bins that transmits light in a first angular range and reflects light in a second angular range back towards said array of bins; a second light redirecting means disposed beyond said first light redirecting means that transmits light in a first angular range and reflects light in a second angular range back towards said first light redirecting means; and said array of metallically reflecting bins disposed above said interconnection plate and each of said LED chips extends through a center of the input aperture.
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2. An illuminating system, comprising:
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an electrical interconnection system for interconnecting at least one LED light emitting element to a power source; at least one LED light emitting element positioned on a common light-emitting plane; a first light redirecting element disposed above the at least one LED light-emitting element on said common light emitting plane, each said first light redirecting element including at least one diffusing medium, a diffusing layer, and a component selected from the group of a metallically reflecting bin and a lens system; a second light redirecting element disposed beyond said common light emitting plane substantially at a distance value F, said second light redirecting element comprised of at least one condensing element having an effective focal length of the value F, coaxial with a center of said common light emitting plane and a dichroic color mixing system designed to pass light of one color band, while redirecting light of another color band; a third light redirecting element disposed above said common light emitting plane a distance being selected from the group of said effective focal length F and twice said effective focal length F, said third light redirecting element comprising a combination of at least one of a reflective polarizer and a quarter-wave phase retardation film, the combination transmitting light outwards in a first polarization state and reflecting light backwards in a second polarization state orthogonal to said first polarization state; a fourth light redirecting element disposed beyond said second and third light redirecting element and reflecting light backwards towards a centroid area of said second light redirecting component; and an output aperture disposed beyond said third light redirecting element, said output aperture containing at least one of a clear window and a spatial light modulator. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification