LED-based light sources for light emitting devices and lighting arrangements with photoluminescence wavelength conversion
First Claim
1. A lighting arrangement comprising:
- at least one light source for generating light having a selected dominant wavelength comprising a plurality LEDs comprising at least one first LED from a first wavelength bin and at least one second LED from a second wavelength bin, wherein the first wavelength bin comprises LEDs having a dominant wavelength that is within a first wavelength range and the second wavelength bin comprises LEDs having a dominant wavelength that is within a second wavelength range; and
a wavelength conversion component located remotely to the at least one source and operable to convert at least a portion of the light generated by the at least one source to light of a different wavelength, wherein the emission product of the arrangement comprises the combination of light generated by the source and the wavelength conversion component; and
wherein the wavelength conversion component comprises a light transmissive substrate and at least one photoluminescence material.
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Abstract
An LED-based light source for generating light having a selected dominant wavelength λds comprises a package housing a plurality of LEDs consisting of LEDs from first and second wavelength bins. The first wavelength bin comprises LEDs having a dominant wavelength λd1 that is within a first wavelength range and the second wavelength bin comprises LEDs having a dominant wavelength λd2 that is within a second wavelength range. The first wavelength bin can comprise LEDs having a dominant wavelength that is shorter than the selected dominant wavelength while the second wavelength bin comprises LEDs having a dominant wavelength that is longer than the selected dominant wavelength. The wavelength bins and number of LEDs are selected such that in operation the dominant wavelength of the combined light emitted by the source is the selected dominant wavelength. Lighting arrangements and light emitting devices incorporating such light sources are disclosed.
118 Citations
12 Claims
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1. A lighting arrangement comprising:
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at least one light source for generating light having a selected dominant wavelength comprising a plurality LEDs comprising at least one first LED from a first wavelength bin and at least one second LED from a second wavelength bin, wherein the first wavelength bin comprises LEDs having a dominant wavelength that is within a first wavelength range and the second wavelength bin comprises LEDs having a dominant wavelength that is within a second wavelength range; and a wavelength conversion component located remotely to the at least one source and operable to convert at least a portion of the light generated by the at least one source to light of a different wavelength, wherein the emission product of the arrangement comprises the combination of light generated by the source and the wavelength conversion component; and wherein the wavelength conversion component comprises a light transmissive substrate and at least one photoluminescence material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An LED-based light emitting device comprising:
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at least one light source for generating light having a selected dominant wavelength comprising a plurality LEDs comprising at least one first LED from a first wavelength bin and at least one second LED from a second wavelength bin, wherein the first wavelength bin comprises LEDs having a dominant wavelength that is within a first wavelength range and the second wavelength bin comprises LEDs having a dominant wavelength that is within a second wavelength range; and at least one photoluminescence material that is operable to convert at least a portion of the light generated by the at least one source to light of a different wavelength, wherein the emission product of the device comprises the combination of light generated by the source and the at least one photoluminescence material.
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Specification