Light emitting device
First Claim
1. A light emitting device comprising at least three light emitting sources and a phosphor, with the three light sources consisted by following light emitting diodes (LED) emitting lights having different wavelength;
- wherein;
a first light source is formed by at least one first LED capable of emitting a blue light having a wavelength ranging between 360 nm and 480 nm;
a second light source is formed by at least one second LED capable of emitted a blue to green light having a wavelength ranging between 480 nm and 570 nm;
a third light source is formed by at least one third LED capable of emitting a red light having a wavelength ranging between 585 nm and 780 nm;
and the phosphor is for absorbing lights having different wavelengths and emitted by the first and second light sources, and is excited to emit a light having a wavelength distinct from those of the first and second light sources;
wherein, the distinct light is blended with the red light emitted from the third light source and the lights emitted from the first and second light sources, and a blended light is released to obtain a white light having an excellent color rendering index.
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Abstract
A light emitting device includes at least three light emitting source and a phosphor, with the three light sources consisted of following light emitting diodes (LED) emitting lights having different wavelengths. Wherein, two light sources are used to excite the phosphor to produce a distinct wavelength different from those of the two light sources. The distinct wavelength is blended with portions of the two light sources and a light source from another independent light source, and a blended light is released to obtain a white light having an excellent color rendering index.
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Citations
5 Claims
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1. A light emitting device comprising at least three light emitting sources and a phosphor, with the three light sources consisted by following light emitting diodes (LED) emitting lights having different wavelength;
- wherein;
a first light source is formed by at least one first LED capable of emitting a blue light having a wavelength ranging between 360 nm and 480 nm;
a second light source is formed by at least one second LED capable of emitted a blue to green light having a wavelength ranging between 480 nm and 570 nm;
a third light source is formed by at least one third LED capable of emitting a red light having a wavelength ranging between 585 nm and 780 nm;
and the phosphor is for absorbing lights having different wavelengths and emitted by the first and second light sources, and is excited to emit a light having a wavelength distinct from those of the first and second light sources;
wherein, the distinct light is blended with the red light emitted from the third light source and the lights emitted from the first and second light sources, and a blended light is released to obtain a white light having an excellent color rendering index. - View Dependent Claims (2, 3, 4, 5)
- wherein;
Specification