Patent ID: 8582272
Filing Date: 2013-11-12
Classification: G11B,H01S

Abstract:
1. A protection circuit for protecting light-emitting diodes of a laser emitter, the laser emitter comprising a first light-emitting diode for reading multimedia data stored in a first media and a second light-emitting diode for reading multimedia data stored in a second media, cathodes of the first light-emitting diode and the second light-emitting diode being grounded, anodes of the first light-emitting diode and the second light-emitting diode being connected with soldering tin, the protection circuit comprising: a first protection element with a first breakdown voltage, a first end of the first protection element being grounded; and a second protection element with a second breakdown voltage, a first end of the second protection element being grounded; wherein when the overvoltage protection circuit is connected to the laser emitter, a second end of the first protection element is connected to the anode of the first light-emitting diode, and a second end of the second protection element is connected to the anode of the second light-emitting diode.