POWER SUPPLY CIRCUIT AND FLAT-SCREEN TELEVISION SET

摘要

PROBLEM TO BE SOLVED: To provide a power supply circuit which stops power supply by a power supply circuit without allowing a new microcomputer or an IC to monitor the failure of a microcomputer for control or temporary malfunction, and safely stopping the power supply when latch-up owing to a noise or a failure due to breakage occurrs, and also to provide a flat-screen television set employing the power supply circuit.;SOLUTION: A safety circuit 16 for monitoring the waveform of a start signal outputted from a microcomputer 40a is provided in the power supply circuit. If a start signal inputted to the safety circuit 16 is not a pulse wave, a power supply cutoff section 16c cuts off the output of the start signal to a DC/AC circuit 13. In this way, the DC/AC circuit 13 cuts off the supply of power from a primary side to a secondary side.;COPYRIGHT: (C)2008,JPO&INPIT