LED LAMP INCORPORATING REMOTE PHOSPHOR WITH HEAT DISSIPATION FEATURES
First Claim
1. A lamp, comprising:
- a light source;
a planar phosphor carrier remote to said light source and comprising a thermally conductive material at least partially transparent to light from said light source, and a conversion material that absorbs light from said light source and emits different wavelengths of light; and
a heat sink structure, said phosphor carrier thermally coupled to said heat sink structure.
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Accused Products
Abstract
An LED lamp or bulb is disclosed that comprises a light source, a heat sink structure and a remote planar phosphor carrier having at least one conversion material. The phosphor carrier can be remote to the light sources and mounted to the heat sink so that heat from the phosphor carrier spreads into the heat sink. The phosphor carrier can comprise a thermally conductive transparent material and a phosphor layer, with an LED based light source mounted to the heat sink such that light from the light source passes through the phosphor carrier. At least some of the LED light is converted by the phosphor carrier, with some lamp embodiments emitting a white light combination of LED and phosphor light. The phosphor arranged according to the present invention can operate at lower temperature to thereby operate at greater phosphor conversion efficiency and with reduced heat related damage to the phosphor.
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Citations
30 Claims
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1. A lamp, comprising:
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a light source; a planar phosphor carrier remote to said light source and comprising a thermally conductive material at least partially transparent to light from said light source, and a conversion material that absorbs light from said light source and emits different wavelengths of light; and a heat sink structure, said phosphor carrier thermally coupled to said heat sink structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A light emitting diode (LED) based lamp, comprising:
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an LED light source; a planar phosphor arranged remote to said light source such that light emitted from said light source passes through said phosphor and is converted by said phosphor; and a thermally conductive path to conduct phosphor conversion heat away from said phosphor and to dissipate said heat. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A lamp, comprising:
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a heat sink structure; a light emitting diode (LED) based light source; a conversion material remote to said light source and arranged to absorb light from said light source and re-emit light in different wavelengths; and a first thermally conductive path to conduct conversion generated heat away from said conversion material to said heat sink. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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28. A lamp, comprising:
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a light source; an optical cavity comprising a phosphor carrier over an opening to said cavity, said light source mounted in said optical cavity remote to said phosphor carrier with light from said light source passing through said phosphor carrier, said optical cavity further comprising reflective surfaces to reflect light from said light source and said phosphor carrier; and a thermally conductive path to conduct phosphor conversion heat away from said phosphor and to dissipate said heat. - View Dependent Claims (29, 30)
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Specification