| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light supply module that is low in cost and fast in reaction speed. <P>SOLUTION: A light supply module comprises a light emitting diode 2 and a power supply switching device 1. The power supply switching device 1 includes: an input port 10 electrically connected to a power supply 100; an output port 20 electrically connected to the light emitting diode 2; a power supply conversion circuit 30; and a switching circuit 40. The power supply conversion circuit 30 receives electric power by being electrically connected to the input port 10 and the output port 20 and converts the power into constant voltage or constant current electric energy to output it. The switching circuit 40 is formed by a self-excited fly-back converter system and electrically connected to the power supply conversion circuit 30, and conducts or cuts off the electric energy output from the power supply conversion circuit 30. This allows the current value of the current output from the power supply conversion circuit 30 to the light emitting diode 2 to be controlled such that the current value will be constant. <P>COPYRIGHT: (C)2013,JPO&INPIT |
