SOLID-STATE LIGHT EMITTING DEVICES AND SIGNAGE WITH PHOTOLUMINESCENCE WAVELENGTH CONVERSION AND PHOTOLUMINESCENT COMPOSITIONS THEREFOR
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United States of America Patent
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Issued Date -
Mar 3, 2016
app pub date -
Nov 9, 2015
filing date -
Dec 2, 2010
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Abstract
A photoluminescent composition (“phosphor ink”) comprises a suspension of particles of at least one blue light (380 nm to 480 nm) excitable phosphor material in a light transmissive liquid binder in which the weight loading of at least one phosphor material to binder material is in a range 40% to 75%. The binder can be U.V. curable, thermally curable, solvent based or a combination thereof and comprise a polymer resin; a monomer resin, an acrylic, a silicone or a fluorinated polymer. The composition can further comprise particles of a light reflective material suspended in the liquid binder. Photoluminescence wavelength conversion components; solid-state light emitting devices; light emitting signage surfaces and light emitting signage utilizing the composition are disclosed.
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