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US 2022/0190211 A1Published application
Tunable lighting system with preferred color rendering
AssigneeLumileds LLC
InventorWouter SOER
Life of this patent
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Abstract
Light emitting devices having a first LED with a first phosphor, a second LED with a second phosphor and a third LED with a third phosphor to emit a composite white light are described. The first LED and first phosphor emit the red spectral component, the second LED and the second phosphor emit the blue spectral component and the third LED and third phosphor emit the green spectral component of the composite white light. The green spectral component has at least 30% radiant flux in a deep red spectral wavelength region.
Claims20
A light emitting device comprising:
- a first LED and a first phosphor configured to emit a red spectral component light having a red color point;
- a second LED and a second phosphor configured to emit a blue spectral component light having a blue color point, the second LED and second phosphor separate from the first LED and first phosphor;
- and
- a third LED and a third phosphor configured to emit a green spectral component light having a green color point, the third LED and third phosphor separate from the first and second LEDs and first and second phosphors, the third phosphor comprising a green phosphor having a peak wavelength between 500 nm and 580 nm and a red phosphor having a peak wavelength greater than 630 nm,
- the red spectral component light, the blue spectral component light, and the green spectral component light combine to form a composite white light.
2 more elements
A light emitting device comprising:
- a first LED and a first phosphor configured to emit a red spectral component light having a red color point;
- a second LED and a second phosphor configured to emit a blue spectral component light having a blue color point, the second LED and second phosphor separate from the first LED and first phosphor;
- a third LED and a third phosphor configured to emit a green spectral component light having a green color point, the third LED and third phosphor separate from the first and second LEDs and first and second phosphors, the third phosphor comprising a green phosphor having a peak wavelength between 500 nm and 580 nm and a red phosphor having a peak wavelength greater than 630 nm;
- and
- a controller configured to independently control an input power for the first LED, the second LED and the third LED,
- the red spectral component light, the blue spectral component light, and the green spectral component light combine to form a composite white light.
3 more elements
A light emitting device comprising:
- a plurality of first LEDs and first phosphors configured to emit a red spectral component light having a red color point;
- a plurality of second LEDs and second phosphors configured to emit a blue spectral component light having a blue color point, the second LEDs and second phosphors separate from the first LEDs and first phosphors;
- a plurality of third LEDs and a third phosphors configured to emit a green spectral component light having a green color point, the third LEDs and third phosphors separate from the first and second LEDs and first and second phosphors, each third phosphor comprising a green phosphor having a peak wavelength between 500 nm and 580 nm and a red phosphor having a peak wavelength greater than 630 nm;
- and
- a controller configured to independently control an input power for the first LEDs, the second LEDs and the third LEDs,
- the red spectral component light, the blue spectral component light, and the green spectral component light combine to form a composite white light.
3 more elements
Dependencies are inferred from the claim text.