LED structure with a dynamic spectrum and a method
First Claim
1. A method of adjusting an emission spectrum of a light emitting structure, the light emitting structure comprising a first light emitting semiconductor source emitting at a first peak of a first wavelength, and a second light emitting semiconductor source emitting at a second peak of a second wavelength, wherein the first and second light emitting semiconductor sources are electrically connected in series, the method comprising:
- supplying a common current of a first magnitude to the serially-connected first and second light emitting semiconductors sources, wherein the first and second wavelengths excite at least one wavelength conversion material to respectively produce emission peaks in the emission spectrum at third and fourth wavelengths, wherein an intensity of the peaks at the third and fourth wavelengths in the emission spectrum comprises a first ratio in response to the first magnitude of the common current; and
supplying a common current of a second magnitude to the serially-connected first and second light emitting semiconductors sources, wherein the intensity of the peaks at the third and fourth wavelengths in the emission spectrum comprises a second ratio in response to the second magnitude of the common current, wherein the second ratio is different from the first ratio.
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Abstract
An integrated LED structure and a method of adjusting the emission spectrum of an integrated LED structure, for photobiological process is disclosed. The structure comprises a substrate; a plurality of optically isolated and electrically non-independent light emission areas integrated on the substrate; a light emitting semiconductor source of a first type mounted in the emission area(s); a light emitting semiconductor source of a second type mounted in the emission area(s); an electrical circuit layer for connecting the light emitting semiconductor sources in serial fashion for each emission area; and wavelength conversion materials. The emission areas are controlled with a common electrical drive current, and the emission output can be tuned by adjusting the common current value, to enable use of one luminaire for a large variety of biomass growing applications.
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Citations
20 Claims
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1. A method of adjusting an emission spectrum of a light emitting structure, the light emitting structure comprising a first light emitting semiconductor source emitting at a first peak of a first wavelength, and a second light emitting semiconductor source emitting at a second peak of a second wavelength, wherein the first and second light emitting semiconductor sources are electrically connected in series, the method comprising:
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supplying a common current of a first magnitude to the serially-connected first and second light emitting semiconductors sources, wherein the first and second wavelengths excite at least one wavelength conversion material to respectively produce emission peaks in the emission spectrum at third and fourth wavelengths, wherein an intensity of the peaks at the third and fourth wavelengths in the emission spectrum comprises a first ratio in response to the first magnitude of the common current; and supplying a common current of a second magnitude to the serially-connected first and second light emitting semiconductors sources, wherein the intensity of the peaks at the third and fourth wavelengths in the emission spectrum comprises a second ratio in response to the second magnitude of the common current, wherein the second ratio is different from the first ratio. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of adjusting an emission spectrum of a light emitting structure, the light emitting structure comprising a first light emitting semiconductor source emitting at a first peak of a first wavelength, and a second light emitting semiconductor source emitting at a second peak of a second wavelength, wherein the first and second light emitting semiconductor sources are electrically connected in series, the method comprising:
adjusting a magnitude of a common current to the serially-connected first and second light emitting semiconductors sources, wherein the first and second wavelengths excite at least one wavelength conversion material to respectively produce emission peaks in the emission spectrum at third and fourth wavelengths, wherein an intensity of the peaks at the third and fourth wavelengths in the emission spectrum comprises first ratio that varies with the magnitude of the common current. - View Dependent Claims (20)
Specification