Device and method for protecting light-emitting diode (LED) light source used by projector

The invention relates to a technology for protecting a light-emitting diode (LED) light source, in particular to a device and a method for protecting the LED light source used by a projector. The device comprises a system control unit and an LED drive unit and is characterized by also comprising a timer, a storage unit, a protection control unit, a detection unit and an LED drive protection unit; the system control unit is connected with the storage unit and the protection control unit respectively; the storage unit is connected with the protection control unit; the timer is connected with the protection control unit; the protection control unit is connected with the LED drive protection unit and the detection unit respectively; the LED drive unit is connected with the LED drive protection unit and the detection unit respectively; and according to the method, the LED light source can be protected in real time by detecting the working state of an LED light source drive circuit in real time. The method has the advantages of capacities of protecting the LED light source used by the protector in real time and preventing the LED light source from being burnt. The method is suitable for the projector using the LED light source.