1. Field of the Invention
The present invention relates to lighting circuits, more particularly, the present invention relates to LED (Light Emitting Diode) lighting circuits.
2. Description of the Related Art
LEDs (Light Emitting Diodes) are recently replacing traditional incandescent and fluorescent illuminating devices as main lighting sources in many applications such as automobiles and home appliances because of their long lifespan, high optic efficiency, and low profile, etc.
Traditional arts of LED dimming control are generally achieved by adjusting the forward current flowing through the LED. Taking a white-light LED for instance, its color temperature will become lower when the forward current flowing through it becomes smaller than its regular forward current. The aforementioned color temperature variance is not desired by the industry. Therefore, there is a need to provide a LED dimming control with stable color temperature performance.