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US 8,575,642 B1Granted
Optical devices having reflection mode wavelength material
AssigneeSoraa, Inc.
InventorFrank Shum
Life of this patent
Estimating the term…
Abstract
Techniques are disclosed for transmitting electromagnetic radiation such as ultra-violet, violet, blue, blue and yellow, and/or blue and green electromagnetic radiation, from LED devices fabricated on bulk semipolar or nonpolar materials and using phosphors. The substrate may include polar gallium nitride.
Claims20
An optical device comprising:
- a substrate member having an upper surface;
- a light emitting diode (LED) device configured to emit light in a first selected wavelength range, the LED device mounted on the upper surface of the substrate member;
- a reflective member surrounding the LED device, the reflective member comprising:
- a dichroic reflection coating;
- and
- a transparent dome;
- a first wavelength-selective material disposed on the upper surface of the substrate member, an upper surface of the wavelength-selective material being below an upper surface of the LED device;
- a second wavelength-selective material disposed on the upper surface of the substrate member;
- and
- a third wavelength-selective material disposed on the upper surface of the substrate member;
- wherein the first wavelength-selective material emits light in a second selected wavelength range in response to light at the first selected wavelength range emitted from the LED device;
- and
- wherein the reflective member transmits substantially all of the light at the second selected wavelength range from the optical device.
10 more elements
A method of fabricating an optical device comprising:
- providing a substrate member having an upper surface;
- providing a light emitting diode (LED) device configured to emit light in a first selected wavelength range, the LED device mounted on the upper surface of the substrate member;
- providing a reflective member surrounding the LED device, the reflective member comprising:
- a dichroic reflection coating;
- and
- a transparent dome;
- providing a first wavelength-selective material disposed on the upper surface of the substrate member around the LED device, an upper surface of the first wavelength-selective material being below an upper surface of the LED device;
- providing a second wavelength-selective material disposed on the upper surface of the substrate member;
- and
- providing a third wavelength-selective material disposed on the upper surface of the substrate member;
- wherein the first wavelength-selective material emits light in a second selected wavelength range in response to light in a first selected wavelength range emitted from the LED device;
- and
- wherein the reflective member transmits substantially all light at the second selected wavelength range e from the optical device.
10 more elements
Dependencies are inferred from the claim text.