| abstract |
A white LED light-emitting device driven by pulse current comprises an LED chip (2) and a light-emitting material (1) which can emit light by the excitation of the LED chip (2). The luminous life of the light-emitting material (1) is 1-100ms, preferably, 5-20ms. The mixed color of the light emitted by the LED chip (2) and the light-emitting material (1) is white. Preferably, the driving frequency of the white LED light-emitting device is 50-150 Hertz. When the current cycle changes, the light emitted by the light-emitting device will not disappear with the disappearance of the light emitted by the LED chip (2), but will last until the beginning of the next cycle, thus the flicker effect of the light emitted by the LED chip (2) generated by the turn-off of the pulse current is compensated. The light output of the white light-emitting device is kept stable during the pulse cycle, and the damage to human eyes caused by the flicker is eliminated. |