Patent ID: 7835127

Claim:
A driver device for driving an external device comprising: a drive circuit which provides a driving potential to said external device; an input terminal to which power for activating said drive circuit is supplied from a power source; a mechanical switch connected to said drive circuit and said input terminal and capable of switching connection and disconnection between said drive circuit and said input terminal; a switch control circuit for controlling the connection and disconnection operation of said mechanical switch; and a temperature detection circuit for detecting a temperature of said drive circuit, wherein said drive circuit, said input terminal, said mechanical switch, said switch control circuit, and said temperature detection circuit are constructed as MEMS, said mechanical switch switches from the connection to disconnection when an overcurrent flows into said drive circuit, and said switch control circuit controls said mechanical switch to switch from the connection to disconnection when the temperature detected by said temperature detection circuit is equal to or higher than a predetermined temperature.