| 摘要 |
PROBLEM TO BE SOLVED: To provide an LED drive circuit that allows preventing an increase in power caused by an excessively high input voltage from an AC power supply by forming a protection circuit through the uses of feedback current detection means.SOLUTION: An LED drive circuit includes: protection means 10 connected to an AC power supply 60; a rectifier 20 electrically connected to the protection means 10; control means 30 having one end electrically connected to the rectifier 20; LED drive means 40 including a light-emitting diode, a first capacitor, and a transistor, the light-emitting diode having a positive electrode and a negative electrode and being connected in parallel to the first capacitor, the positive electrode of the light-emitting diode being electrically connected to the rectifier 20 and the control means 30; and feedback current detection means 50 provided between the LED drive means 40 and the control means 30. |
