SOLID-STATE LIGHT EMITTING DEVICES WITH PHOTOLUMINESCENCE WAVELENGTH CONVERSION
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United States of America Patent
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Issued Date -
Oct 29, 2015
app pub date -
Feb 17, 2015
filing date -
Oct 5, 2010
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Abandoned
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Abstract
A solid-state light emitting device comprises a light transmissive thermally conductive circuit board; an array of solid-state light emitters (LEDs) mounted on, and electrically connected to, at least one face of the circuit board; and a photoluminescence wavelength conversion component. The wavelength conversion component comprises a mixture of particles of at least one photoluminescence material (phosphor) and particles of a light reflective material. The emission product of the device comprises the combined light generated by the LEDs and the photoluminescence material. The wavelength conversion component can comprise a layer of the phosphor material and particles of a light reflective material applied directly to the array of LEDs in the form of an encapsulant. Alternatively the photoluminescence component is a separate component and remote to the array of LEDs such as tubular component that surrounds the LEDs.
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