White light color changing solid state lighting and methods
First Claim
1. A solid state lighting (SSL) luminaire, comprising:
- a first plurality of light emitting diodes (LEDs);
a second plurality of light emitting diodes emitting light with characteristics different from the first plurality of LEDs; and
a current control mechanism configured to control the intensity of light from said first and second pluralities of LEDs, said current control mechanism capable of separately and disproportionately changing the emission intensity of said first and second pluralities of LEDs, such that said SSL luminaire emits light having desired characteristics;
wherein said first and second pluralities of LEDs can be turned off by said current control mechanism;
wherein one of said first or second pluralities of LEDs has higher emission efficiency than the other; and
wherein said current control mechanism can turn off the one of said first and second pluralities of LEDs with lower emission efficiency.
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Accused Products
Abstract
Solid state lighting (SSL) luminaries are disclosed wherein the emission intensity of discrete light sources within the SSL luminaire can be varied to produce luminaire light having different characteristics. The present invention can utilize the unique circuit topology of SSL luminaires to vary the emission intensity of different types of LEDs in the luminaire. In some embodiments, the different types of LEDs are connected in respective serial strings, and the intensity of emission of the LEDs in each of the strings can be varied by changing the electrical signal driving the strings. In some of these embodiments, white light is emitted from the SSL luminaire by combining emission from BSY and red LEDs. For these embodiments the color changing solutions according to the present invention can include, as an example, changing color while dimming the luminaire, changing color between daytime and nighttime modes, and changing between most efficient and points in between.
224 Citations
38 Claims
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1. A solid state lighting (SSL) luminaire, comprising:
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a first plurality of light emitting diodes (LEDs); a second plurality of light emitting diodes emitting light with characteristics different from the first plurality of LEDs; and a current control mechanism configured to control the intensity of light from said first and second pluralities of LEDs, said current control mechanism capable of separately and disproportionately changing the emission intensity of said first and second pluralities of LEDs, such that said SSL luminaire emits light having desired characteristics; wherein said first and second pluralities of LEDs can be turned off by said current control mechanism; wherein one of said first or second pluralities of LEDs has higher emission efficiency than the other; and wherein said current control mechanism can turn off the one of said first and second pluralities of LEDs with lower emission efficiency. - View Dependent Claims (2, 3, 4, 5)
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6. A solid state lighting (SSL) luminaire, comprising:
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a first plurality of light emitting diodes (LEDs); a second plurality of LEDs emitting light with characteristics different from the first plurality of LEDs; and a current control mechanism configured to control the intensity of light from said first and second pluralities of LEDs, said current control mechanism capable of separately changing the emission intensity of said first and second pluralities of LEDs, such that said SSL luminaire emits light having desired characteristics, wherein said first plurality of LEDs comprises blue shifted yellow (BSY) LEDs and said second plurality of LEDs comprises red emitting LEDs, wherein said BSY LEDs emit light more efficiently than said red LEDs and wherein said current control mechanism can turn off said red LEDs for high efficiency lighting operation.
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7. A solid state lighting (SSL) luminaire, comprising:
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a first plurality of light emitting diodes (LEDs); a second plurality of light emitting diodes emitting light with characteristics different from the first plurality of LEDs; and a current control mechanism configured to control the intensity of light from said first and second pluralities of LEDs, said current control mechanism capable of separately changing the emission intensity of said first and second pluralities of LEDs, such that said SSL luminaire emits light having desired characteristics, wherein said current control mechanism controls the intensity of said first and second pluralities of LEDs during dimming of said SSL luminaire such that said first plurality of LEDs are disproportionally dimmed compared to said second plurality of LEDs.
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8. A solid state lighting (SSL) luminaire, comprising:
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a plurality of first light emitting diodes (LEDs); a plurality of second light emitting diodes emitting light with characteristics different from the first LEDs; and a current control mechanism configured to control the intensity of light from said first and second pluralities of LEDs, said current control mechanism capable of separately changing the emission intensity of said first and second pluralities of LEDs, such that said SSL luminaire emits light having desired characteristics, wherein said current control mechanism varies the emission of said first and second pluralities of LEDs so that the emission from said SSL luminaire is on a point on a CIE diagram tie line between the emission points for said first and second pluralities of LEDs.
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9. A solid state lighting (SSL) luminaire, comprising:
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a first plurality of light emitting diodes (LEDs); a second plurality of light emitting diodes emitting light with characteristics different from the first plurality of LEDs; and a current control mechanism configured to control the intensity of light from said first and second pluralities of LEDs, said current control mechanism capable of separately changing the emission intensity of said first and second pluralities of LEDs, such that said SSL luminaire emits light having desired characteristics, wherein said current control mechanism controls the intensity of said first and second pluralities of LEDs during dimming of said SSL luminaire such that said first plurality of LEDs are disproportionally dimmed compared to said second plurality of LEDs, wherein said current control mechanism controls the intensity of said first and second pluralities of LEDs during dimming of said SSL luminaire such that said SSL luminaire mimics dimming of incandescent based lighting fixtures. - View Dependent Claims (10, 11)
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12. A solid state lighting (SSL) luminaire, comprising:
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a first plurality of blue shifted yellow (BSY) light emitting diodes (LEDs); a second plurality of BSY LEDs emitting light with different characteristics than said first plurality of BSY LEDs; and a third plurality of red LEDs, wherein the relative emission intensities of the first, second and third pluralities of LEDs can be separately varied at different rates when adjusting the intensity of light of the SSL luminaire, such that said SSL luminaire emits a combination of light from said first, second and third pluralities of LEDs with desired lighting characteristics. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A solid state lighting (SSL) luminaire, comprising:
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a first plurality of blue shifted yellow (BSY) light emitting diodes (LEDs); a second plurality of BSY LEDs emitting light with different characteristics than said first BSY LEDs; and a third plurality of LEDs which is red, wherein the relative emission intensities of the first, second and third pluralities of LEDs can be separately varied when adjusting the intensity of light of the SSL luminaire, such that said SSL luminaire emits a combination of light from said first, second and third pluralities of LEDs with desired lighting characteristics, wherein one of said first and second pluralities of LEDs emits light more efficiently that the other, wherein said third plurality of LEDs and the least efficient ones of said first and second pluralities of LEDs are turned off for high efficiency SSL luminaire operation.
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19. A solid state lighting (SSL) luminaire, comprising:
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a first plurality of blue shifted yellow (BSY) light emitting diodes (LEDs); a second plurality of BSY LEDs emitting light with different characteristics than said first BSY LEDs; and a third plurality of LEDs which is red, wherein the relative emission intensities of the first, second and third pluralities of LEDs can be separately varied when adjusting the intensity of light of the SSL luminaire, such that said SSL luminaire emits a combination of light from said first, second and third pluralities of LEDs with desired lighting characteristics, wherein the intensity of said first, second and third pluralities of LEDs reduces disproportionately during dimming of said SSL luminaire.
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20. A solid state lighting (SSL) luminaire, comprising:
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a first plurality of blue shifted yellow (BSY) light emitting diodes (LEDs); a second plurality of BSY LEDs emitting light with different characteristics than said first plurality of BSY LEDs; and a third plurality of LEDs which is red, wherein the relative emission intensities of the first, second and third pluralities of LEDs can be separately varied when adjusting the intensity of light of the SSL luminaire, such that said SSL luminaire emits a combination of light from said first, second and third pluralities LEDs with desired lighting characteristics, wherein the intensity of said first, second and third pluralities of LEDs reduces disproportionately during dimming of said SSL luminaire, mimicking the dimming of an incandescent based light.
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21. A solid state lighting (SSL) luminaire, comprising:
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a first plurality of serially connected light emitting diodes (LEDs); a second plurality of serially connected LEDs; and a third plurality of serially connected LEDs, said first, second and third pluralities of LEDs having different emission characteristics and capable of emitting a range of emission intensities, wherein the relative emission intensities of the first, second and third pluralities of LEDs can be varied disproportionately such that said SSL luminaire can be controlled to emit light with different lighting characteristics. - View Dependent Claims (22, 23, 25, 26, 27)
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24. A solid state lighting (SSL) luminaire, comprising:
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a first plurality of serially connected light emitting diodes (LEDs); a second plurality of serially connected LEDs; and a third plurality of serially connected LEDs, said first, second and third pluralities of LEDs having different emission characteristics, wherein the relative emission intensities of the first, second and third pluralities of LEDs can be varied such that said SSL luminaire can be controlled to emit light with different lighting characteristics, wherein the emission of said first, second or third pluralities of LEDs can be turned off manually.
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28. A solid state lighting (SSL) luminaire, comprising:
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a first plurality of serially connected light emitting diodes (LEDs); a second plurality of serially connected LEDs; and a third plurality of serially connected LEDs, said first, second and third pluralities of LEDs having different emission characteristics, wherein the relative emission intensities of the first, second and third pluralities of LEDs can be varied such that said SSL luminaire can be controlled to emit light with different lighting characteristics, wherein the emission intensity of said first, second and third pluralities of LEDs can be reduced disproportionately during dimming of said SSL luminaire.
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29. A solid state lighting (SSL) luminaire, comprising:
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a first plurality of serially connected light emitting diodes (LEDs); a second plurality of serially connected LEDs; and a third plurality of serially connected LEDs, said first, second and third pluralities of LEDs having different emission characteristics, wherein the relative emission intensities of the first, second and third pluralities of LEDs can be varied such that said SSL luminaire can be controlled to emit light with different lighting characteristics, the emission of said first, second and third pluralities of LEDs can be varied so that the emission from said SSL luminaire is on a point on a CIE diagram within a triangle formed by a tie line between the emission points for said first, second and third LEDs.
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30. A solid state lighting (SSL) luminaire, comprising:
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a first plurality of serially connected light emitting diodes (LEDs); a second plurality of serially connected LEDs; and a third plurality of serially connected LEDs, said first, second and third pluralities of LEDs having different emission characteristics, wherein the relative emission intensities of the first, second and third pluralities of LEDs can be varied such that said SSL luminaire can be controlled to emit light with different lighting characteristics, wherein the emission of said first, second and third pluralities of LEDs can be varied so that the emission from said SSL luminaire is on a point on a CIE diagram within a triangle formed by a tie line between the emission points for said first, second and third pluralities of LEDs, wherein the emission of said first, second and third pluralities of LEDs is varied automatically in response to changing lighting conditions.
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31. A solid state lighting (SSL) luminaire, comprising:
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a first plurality of light emitting diodes (LEDs); and a second plurality of LEDs emitting light with characteristics different from the first plurality of LEDs, wherein the intensity of light from said first and second pluralities of LEDs can be separately controlled at different rates so that said SSL luminaire produces a dominant emission from one of said first and second pluralities of LEDs in response to changing lighting conditions; wherein said first plurality of LEDs and said plurality of second LEDs can emit a range of emission intensities. - View Dependent Claims (32)
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33. A solid state lighting (SSL) luminaire, comprising:
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a first plurality of red light emitting diodes (LEDs); a second plurality of LEDs emitting light with characteristics different from the first plurality of LEDs; and a current control mechanism configured to control the intensity of light from said first and second pluralities of LEDs, said current control mechanism capable of separately and disproportionately changing the emission intensity of said first and second pluralities of LEDs, such that said SSL luminaire emits light having desired characteristics; wherein said current control mechanism can turn off said second plurality of LEDs. - View Dependent Claims (34, 35, 36, 37, 38)
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Specification