LIGHTING FACILITY BASED ON WHITE LIGHT-EMITTING DIODES AND EXCITED BY PULSE CURRENT Russian patent published in 2014 - IPC H01L33/50 C09K9/00 C09K11/00 

FIELD: electricity.

SUBSTANCE: invention is related to a lighting facility based on white light-emitting diodes and excited by pulse current. The facility includes blue, violet and ultraviolet LED chips packed inside and a luminescent coating using a luminescent material. The luminescent material represents a combination (1) or (2) of the luminescent material A with blue afterglow and of a yellow luminescent material. The yellow luminescent material B is capable of light emission when blue, violet and ultraviolet LED chips and/or the luminescent material A with blue afterglow are excited. The combination (1) represents the following combination: 5% Sr₂MgSi₂O₇:Eu²⁺,Dy³⁺ + 15% CaSrS:Bi³⁺ + 20% Sr₄Al₁₄O₂₅:Eu²⁺,Dy³⁺ and 15% Sr₃SiO₅:Eu²⁺,Dy³⁺ + 20% Ca₂MgSi₂O₇:Eu²⁺,Dy³⁺ + 25% Y₃Al₅O₁₂:Ce, while the combination (2) is represented in the following way: 35% CaS:Br³⁺,Na⁺ and 25% Y₂O₃·Al₂O₃·SiO₂:Ce·B·Na·P + 10 %CaS:Sm³⁺ + 15% Y₂O₂S:Mg,Ti + 5% Sr₃SiO₅:Eu²⁺,Dy³⁺ + 10% Ca₂MgSi₂O₇:Eu²⁺,Dy³⁺. At that the lighting facility based on white light-emitting diodes excites the LED chips by pulse current with a frequency of at least 50 Hz.

EFFECT: invention allows improving stability of luminescence and reducing the thermal effect.

5 cl, 6 dwg, 3 tbl, 2 ex