Multi-chip light emitting diode light device
AssigneePhotonic Developments LLC
InventorsMartin A. ALPERT, Edward F. CAROME, Richard L. HANSLER, Vilnis E. KUBULINS
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Abstract
An electric lamp includes a first light source and a second light source and power circuitry configured to selectively energize the first light source and the second light source. The first light source is configured to produce light that is substantially free of wavelengths below about 530 nanometers, and the second light source is configured to product light having wavelengths of less than about 530 nanometers. The electric lamp is configured to produce white or near-white light in a variety of color temperatures, while retaining good color rendering index.
Claims25
A lamp comprising:
- a first light source;
- a second light source;
- and
- power circuitry configured to selectively energize the first light source and/or the second light source;
- wherein the first light source is configured to produce light that is substantially free of wavelengths below about 530 nanometers (nm), and the second light source is configured to produce light having wavelengths of less than about 530 nm.
A lamp comprising:
- a plurality of light emitting diodes (LEDs);
- circuitry operatively coupled to the plurality of LEDs and configured to selectively energize each of the plurality of LEDs;
- and
- a filter positioned to receive light output from at least some of the plurality of LEDs, wherein the filter is configured to absorb light within a wavelength range of about 450 nm to about 480 nm.
A lamp comprising:
- a housing at least partially covered by a conversion material;
- a first excitation light emitting diode (LED) disposed within the housing;
- a second LED disposed within the housing;
- and
- a controller configured to selectively energize the first excitation LED and the second LED;
- wherein the first excitation LED is positioned to provide light to the conversion material, and the conversion material is configured to produce white light substantially free of visible wavelengths below about 530 nanometers (nm) in response to light from the first excitation LED.
Dependencies are inferred from the claim text.