Protective diffusive coating for led lamp
AssigneeCree, Inc.
InventorsMark Edmond, Shaow B. Lin, Gerald H. Negley, Paul Kenneth Pickard
Life of this patent
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Abstract
The present disclosure discloses LED lamps and enclosures comprising light transparent polymer coatings comprising light diffusing particles as well as methods for providing improved luminous intensity distribution. More particularly, the present disclosure relates to enclosures comprising light-transparent polymer coatings comprising a light diffusing particles on at least one surfaces of the enclosure of an LED lamp.
Claims61
An LED lamp comprising:
- an enclosure about one or more LEDs, the enclosure comprising an interior surface separated from an exterior surface by a thickness, the enclosure comprising deposited on the exterior surface a light-transparent coating comprising light-diffusing particles.
(canceled)
An LED lamp comprising:
- an enclosure about one or more LEDs, the enclosure comprising:
- a diffuse interior surface capable of diffracting light emitted from the one or more LEDs;
- an exterior surface separated from the diffuse interior surface by a thickness;
- and
- a light-transparent coating deposited on the exterior surface, the light-transparent coating comprising light-diffusing particles.
An LED lamp comprising:
- an enclosure about one or more LEDs, the enclosure comprising:
- an interior surface;
- an exterior surface separated from the interior surface by a thickness, the thickness comprising one or more lanthanide compounds and/or lanthanide elements;
- and
- a light-transparent coating deposited on the exterior surface, the light-transparent coating comprising light-diffusing particles.
An LED lamp comprising:
- an enclosure about one or more LEDs, the enclosure comprising:
- a diffuse interior surface capable of diffracting light emitted from the one or more LEDs;
- an exterior surface separated from the interior surface by a thickness, the thickness comprising one or more lanthanide compounds and/or lanthanide elements;
- and
- a light-transparent coating deposited on the exterior surface, the light-transparent coating comprising light-diffusing particles.
An LED lamp comprising:
- an enclosure about one or more LEDs, the enclosure comprising:
- an interior diffuse surface;
- and
- an exterior diffuse surface separated from the interior surface.
A method of providing improved luminous intensity distribution of a light emitting diode (LED) lamp, the method comprising:
- coating an enclosure surrounding the one or more LEDs, the enclosure having an interior surface separated from an exterior surface by a thickness, the coating comprising light-diffusing particles in an amount sufficient to diffuse light emitted by the one or more LEDs;
- and
- providing a normalized luminous intensity of 0.75 to 1.25 maintained over the range of 0 to 135 degrees of angle of measurement.
51-59. (canceled)
A method of providing improved luminous intensity distribution of a light emitting diode (LED) lamp, the method comprising:
- diffusing light emitted by one or more LEDs capable of emitting light of one or more wavelengths by passing the one or more wavelengths of light through a coating deposited on an exterior surface of an enclosure at least partially surrounding the one or more LEDs, the coating comprising a transparent polymer matrix and an amount of light-diffusing particles;
- and
- providing a normalized luminous intensity of between 0.75 to 1.25 maintained over a range of 0 to 135 degrees of angle of measurement.
An enclosure for a light emitting diode (LED) lamp, the enclosure comprising:
- an interior surface and an exterior surface separated by a thickness from the interior surface;
- and
- a coating deposited on at least a portion of the enclosure, the coating comprising a light-transparent polymer matrix and an amount of light-diffusing particles distributed or dispersed therein.
Dependencies are inferred from the claim text.