White LED light source and LED lamp comprising same
A technology of LED light source and white color, which is applied in the direction of light source, semiconductor device of light-emitting element, lighting device, etc. It can solve the problems of high requirements for bracket material, inability to reduce blue light hazard, low color fidelity Rf, etc., and improve light efficiency , improve learning and work efficiency, and avoid material degradation
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Embodiment 1
[0050] A white LED light source, its spectrum is as follows figure 1 As shown, the color temperature is 5000K, there is a first spectral peak in the wavelength range of 459-495nm, the maximum light intensity is A (denoted as 100%), and the corresponding wavelength λ A It is 469nm, the ratio of light intensity to A in the wavelength range of 459-495nm is (0.50-1):1; there is a second spectral peak in the wavelength range of 400-450nm, and the maximum light intensity is B (recorded as 43.8%) , the corresponding wavelength is 438nm; there is a trough between the first spectral peak and the second spectral peak, the minimum light intensity is C (recorded as 21.2%), and the corresponding wavelength is 448nm.
[0051] The white LED light source is a dual-wavelength blue light chip that excites phosphor powder to emit light, and the wavelengths of the dual-wavelength blue light chip are 440-445nm and 470-480nm respectively;
[0052] The composition of the fluorescent powder accordin...
Embodiment 2
[0061] A white LED light source, the phosphor powder is excited by a dual-wavelength blue light chip, and the wavelengths of the dual-wavelength blue light chip are 435-440nm and 460-465nm respectively;
[0062] The composition of the fluorescent powder according to the mass percentage content is: 75-97% halophosphate green fluorescent powder (Sr, Ba) with an emission peak wavelength of 450-490nm 5 (PO4) 3 Cl:Eu 2+ , 2-15% nitrogen oxide-based green phosphor BaSi with emission peak wavelength of 490-520nm 2 o 2 N 2 :Eu 2+ and 1-10% of the nitride-based red phosphor CaAlSiN with an emission peak wavelength of 620-670 nm 3 :Eu 2+ .
[0063] Spectral diagrams of the white LED light source at different color temperatures (5000K, 4000K, 3000K, 2700K) are as follows Figure 4 As shown, there is the first spectral peak in the wavelength range of 459-495nm, the maximum light intensity is A, and the corresponding wavelength λ A It is 460nm; there is a second spectral peak in t...
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