LAMP WITH ADJUSTABLE COLOR
First Claim
1. A white-light electro-luminescent lamp having an adjustable spectral power distribution, comprising:
- a. a first light-emitting element which emits light within each of three wavelength bands, including a first wavelength band between 440 and 520 nm, a second wavelength band between 520 and 600 nm, and a third wavelength band between 600 and 680 nm wherein an integrated spectral power within the first wavelength band is higher than the second wavelength band and the integrated spectral power within the second wavelength band is higher than the third wavelength band;
b. a second light-emitting element which emits light within each of three wavelength bands, including a first wavelength band between 440 and 520 nm, a second wavelength band between 520 and 600 nm, and a third wavelength band between 600 and 680 nm wherein the integrated spectral power within the third wavelength band is higher than the integrated spectral power of the second wavelength band and the integrated spectral power within the second wavelength band is higher than the integrated spectral power within the first wavelength band; and
c. a controller that modulates the integrated spectral power of the light produced by the first and the second light-emitting elements such that the spectral power distribution of the light formed by combining the light produced by the modulated first and second light-emitting elements is substantially equal to a CIE standard daylight spectral power distribution for correlated color temperatures between 4000K-9500K.
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Accused Products
Abstract
A white-light electro-luminescent lamp having an adjustable spectral power distribution, including a first light-emitting element which emits light within each of three wavelength bands, 1) between 440 and 520 nm, 2) between 520 and 600 nm, and 3) between 600 and 680 nm. A second light-emitting element emits light within each of three wavelength bands, 1) between 440 and 520 nm, 2) between 520 and 600 nm, and 3) between 600 and 680 nm. A controller modulates the integrated spectral power of the light produced by the first and the second light-emitting elements such that the spectral power distribution of the light formed by combining the light produced by the modulated first and second light-emitting elements is substantially equal to a CIE standard daylight spectral power distribution for correlated color temperatures between 4000K-9500K.
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Citations
20 Claims
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1. A white-light electro-luminescent lamp having an adjustable spectral power distribution, comprising:
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a. a first light-emitting element which emits light within each of three wavelength bands, including a first wavelength band between 440 and 520 nm, a second wavelength band between 520 and 600 nm, and a third wavelength band between 600 and 680 nm wherein an integrated spectral power within the first wavelength band is higher than the second wavelength band and the integrated spectral power within the second wavelength band is higher than the third wavelength band; b. a second light-emitting element which emits light within each of three wavelength bands, including a first wavelength band between 440 and 520 nm, a second wavelength band between 520 and 600 nm, and a third wavelength band between 600 and 680 nm wherein the integrated spectral power within the third wavelength band is higher than the integrated spectral power of the second wavelength band and the integrated spectral power within the second wavelength band is higher than the integrated spectral power within the first wavelength band; and c. a controller that modulates the integrated spectral power of the light produced by the first and the second light-emitting elements such that the spectral power distribution of the light formed by combining the light produced by the modulated first and second light-emitting elements is substantially equal to a CIE standard daylight spectral power distribution for correlated color temperatures between 4000K-9500K. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 17, 18)
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12. A controller for adjusting the spectral power distribution of a white-light electro-luminescent lamp;
- comprising;
a. a control means for increasing or decreasing a ratio of integrated spectral power from the light produced by a first light-emitting element to the integrated spectral power of the light produced by a second light-emitting element to control the spectral power distribution of the light produced by the lamp for a correlated color temperature range between 4000K-9500K; and b. a signal receiving means for receiving input signals from an external source. - View Dependent Claims (13, 14, 15, 16)
- comprising;
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19. An image capture device containing a lamp producing light with an adjustable spectral power distribution, wherein the spectral power of the light produced by the lamp is comprised of:
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a. a first light-emitting element which emits light within each of three wavelength bands, including a first wavelength band between 440 and 520 nm, a second wavelength band between 520 and 600 nm, and a third wavelength band between 600 and 680 nm wherein an integrated spectral power within the first wavelength band is higher than the second wavelength band and the integrated spectral power within the second wavelength band is higher than the third wavelength band; b. a second light-emitting element which emits light within each of three wavelength bands, including a first wavelength band between 440 and 520 nm, a second wavelength band between 520 and 600 nm, and a third wavelength band between 600 and 680 nm wherein the integrated spectral power within the third wavelength band is higher than the integrated spectral power of the second wavelength band and the integrated spectral power within the second wavelength band is higher than the integrated spectral power within the first wavelength and a controller that modulates the integrated spectral power of the light produced by the first and the second light-emitting elements such that the spectral power distribution of the light formed by combining the light produced by the modulated first and second light-emitting elements is substantially equal to a CIE daylight spectral power distribution for correlated color temperatures between 4000K-9500K. - View Dependent Claims (20)
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Specification