LIGHT-EMITTING DEVICE WITH A TUNABLE LIGHT EMISSION SPECTRUM
First Claim
1. A light emitting device with a tunable light emission spectrum, the light emitting device comprising:
- one or more blue light emitting diodes (LED) in optical communication with n different red phosphor compositions, each of the n different red phosphor compositions including a different amount of strontium (Sr) and comprising light emission in a wavelength range from about 600 nm to about 675 nm, the one or more blue LEDs comprising light emission in a wavelength range from about 400 nm to about 475 nm,wherein an mth different red phosphor composition has a formula Ca1-x-ySrxEuyAlSiN3, with 0<
x<
1 and 0<
y<
1, and x=xm and 1≦
m≦
n, andwherein a light emission spectrum of the light emitting device comprises a blue spectral component from the one or more blue LEDs and a red spectral component from the n different red phosphor compositions, the red spectral component comprising n overlapping light emission profiles each having a different peak emission wavelength λ
m.
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Abstract
A light emitting device with a tunable light emission spectrum includes one or more blue LEDs in optical communication with n different red phosphor compositions. Each of the n different red phosphor compositions includes a different amount of strontium (Sr) and comprises light emission in a wavelength range from about 600 nm to about 675 nm. Each of the blue LEDs comprises light emission in a wavelength range from about 400 nm to about 475 nm. An mth different red phosphor composition has a formula Ca1-x-ySrxEuyAlSiN3, with 0<x<1 and 0<y<1, and x=xm and 1≦m≦n. A light emission spectrum of the light emitting device comprises a blue spectral component from the one or more blue LEDs and a red spectral component from the n different red phosphor compositions, where the red spectral component comprises n overlapping light emission profiles each having a different peak emission wavelength λm.
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Citations
21 Claims
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1. A light emitting device with a tunable light emission spectrum, the light emitting device comprising:
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one or more blue light emitting diodes (LED) in optical communication with n different red phosphor compositions, each of the n different red phosphor compositions including a different amount of strontium (Sr) and comprising light emission in a wavelength range from about 600 nm to about 675 nm, the one or more blue LEDs comprising light emission in a wavelength range from about 400 nm to about 475 nm, wherein an mth different red phosphor composition has a formula Ca1-x-ySrxEuyAlSiN3, with 0<
x<
1 and 0<
y<
1, and x=xm and 1≦
m≦
n, andwherein a light emission spectrum of the light emitting device comprises a blue spectral component from the one or more blue LEDs and a red spectral component from the n different red phosphor compositions, the red spectral component comprising n overlapping light emission profiles each having a different peak emission wavelength λ
m. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification