1. Technical Field
The disclosure relates to a driving device, and more particularly to a light emitting device (LED) driving device.
2. Related Art
Generally, LED driving device usually first coverts an AC voltage to a DC voltage, and then drives LEDs and controls the brightness of LEDs using a stable DC voltage or a stable DC current.
However, to turn on two or more than two LEDs connected in series, LED driving device must supply the voltage greater than the totality of the turned-on voltages of two or more than two LEDs. Thus, the power source with higher voltage value is required. This may cause higher power consumption. Moreover, if the current passing through LEDs is unstable, the brightness of LEDs may be affected. Thus, it is desirous to develop a new LED driving device, which may improve LED's illumination quality and have less power consumption.