| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a power supply circuit that, even in a case where one of a plurality of LED illumination lights is removed during energization, has no change in brightnesses of the remaining LED illumination light, and that prevents the life from being affected.SOLUTION: A power supply circuit comprises: a parallel circuit part 20 in which connectors 28X and 28Y attached and connected with a plurality of LED illumination lights 7X and 7Y are electrically connected in parallel; and a constant current supply circuit part 10 for supplying a specified current Ia to the parallel circuit part 20. The power supply circuit comprises detection control means 3 detecting the removal instantaneously when one of the plurality of LED illumination lights 7X and 7Y is removed from the connector 28X during energization, and performing current limitation of a specified current Ia to a specification current of the remaining LED illumination light 7Y.</p> |
