White light-emitting diode (LED) lighting device powered by pulse current

摘要

A white LED lighting device activated by a pulse current, characterized in that the white LED lighting device comprises a blue LED chip and a luminescent coating made of a luminescent material, the luminescent material being any one of the following combinations (1 ) and (2) of material A luminescent of remaining blue luminosity and material B of yellow luminescence, being material B of yellow luminescence capable of emitting light under the excitation of the blue LED chip and excitation of material A luminescent of remaining blue luminosity, combination (1) the combination of 5% by weight of Sr2MgSi2O7: Eu2 +, Dy3 + + 15% by weight of CaSrS: Bi3 + + 20% by weight of Sr4Al14O25: Eu2 +, Dy3 + and 15% by weight of Sr3SiO5: Eu2 +, Dy3 + + 20 % by weight of Ca2MgSi2O7: Eu2 +, Dy3 + + 25% by weight of Y3Al5O12: Ce, combination (2): the combination of 35% by weight of CaS: Bi3 +, Na + and 25% by weight of Y2O3 · Al2O3 · SiO2: Ce · B · Na · P + 10% by weight of C aS: Sm3 + + 15% by weight of Y2O2S: Mg, Ti + 5% by weight of Sr3SiO5: Eu2 +, Dy3 + + 10% by weight of Ca2MgSi2O7: Eu2 +, Dy3 +; the white LED lighting device activated by the LED chips with a pulse current having a frequency of not less than 50 Hz.