Patent ID: 7777703

Claim:
An illuminating device, comprising: an LED light source, composed of at least one light-emitting diode (LED), wherein the LED light source has a plurality of light-emitting states; a changeover switch, for switching the light-emitting states of the LED light source, wherein the changeover switch has a plurality of switching modes corresponding to the light-emitting states; a detecting circuit, directly electrically connected to the changeover switch, for detecting the switching modes of the changeover switch; a memory unit, electrically connected to the detecting circuit, for storing luminance values of the LEDs of the LED light source corresponding to the switching modes of the changeover switch detected by the detecting circuit, converting the luminance values of the LEDs into a luminance control signal, and transmitting the luminance control signal to the detecting circuit; and a power conversion circuit, directly electrically connected to the LED light source, for receiving the luminance control signal transmitted from the detecting circuit, such that the LEDs produce luminance of the light-emitting states corresponding to the switching modes.