Patent ID: 9185761
Filing Date: 2015-11-10
Classification: H01L,H05B

Abstract:
1. A white Light-Emitting Diode (LED) device, said LED device comprising: an LED chip and a light emitting material capable of emitting light when excited by said LED chip, said LED chip comprising a single light emitting PN junction, and wherein said LED chip is driven directly by Alternating Current (AC) with a frequency of not more than 100 Hz, wherein a luminous lifetime of the light emitting material is 1 to 100 ms, wherein a luminous brightness under a non-constant current condition is compensated for through afterglow of the light emitting material, and wherein light emitted by the LED chip is mixed with light emitted by the light emitting material to form white light, wherein said light emitting material is selected from the group consisting of (1) a combination of Zn 2 P 2 O 7 :Tm 3+ ; and Zn 3 (PO 4 ) 2 :Mn 2+ , Ga 3+ ; (2) CaAl (3) a combination of Sr (4) a combination of Sr (5) a combination of SrMg (6) a combination of Sr (7) a combination of SrAl (8) a combination of Y