Solid state light sources based on thermally conductive luminescent elements containing interconnects
AssigneeGoldeneye, Inc.
InventorsScott M. Zimmerman, William R. Livesay, Richard L. Ross, Eduardo DeAnda
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Abstract
Solid state light sources based on LEDs mounted on or within thermally conductive luminescent elements provide both convective and radiative cooling. Low cost self-cooling solid state light sources can integrate the electrical interconnect of the LEDs and other semiconductor devices. The thermally conductive luminescent element can completely or partially eliminate the need for any additional heatsinking means by efficiently transferring and spreading out the heat generated in LED and luminescent element itself over an area sufficiently large enough such that convective and radiative means can be used to cool the device.
Claims46
A self cooling light source comprising
- a light emitting diode, and
- a thermally conductive luminescent element on said light emitting diode, said thermally conductive luminescent element being a thermal spreading element for heat generated by said light emitting diode and said thermally conductive luminescent element, and said thermally conductive luminescent element being a light extraction means for light emitted by said light emitting diode.
A self cooling light source comprising
- a light emitting diode, and
- a thermally conductive wavelength conversion element on said light emitting diode, said thermally conductive wavelength conversion element being a thermal spreading element for heat generated by said light emitting diode and said thermally conductive wavelength conversion element, and said thermally conductive wavelength conversion element converting the wavelength of light emitted by said light emitting diode.
A self cooling solid state light source, comprising:
- at least one light-emitting diode (LED) die;
- and
- at least one thermally conductive luminescent element, wherein said luminescent element includes an electrical interconnect and functions as a wavelength converter, converting at least a portion of the light emitted by said LED die to a different wavelength range, and also functions as an optical waveguide for light emitted by said LED die, and also functions as a heat spreading element, spreading heat generated by said LED die over a greater cross-sectional area, and finally provides a high emissivity layer, for optimal coupling of emitted light from the light source.
A self cooling solid state light source, comprising:
- at least one light-emitting diode (LED) die;
- and
- at least one thermally conductive luminescent element bonded to the at least one LED die;
- wherein light is emitted from the LED die principally in a direction through the at least one luminescent element, and heat generated in the light source is transmitted principally in the same direction as the direction of light emission, whereby heat is dissipated from the light source by a combination of radiation, conduction and convection from the at least one luminescent element, without the need for a device heat sink.
Dependencies are inferred from the claim text.