Biometric authentication system and living body information detection device

A biometric authentication system comprising:

• a detection device configured to acquire living body information;
• and
• an authentication device coupled to the detection device via a network and configured to perform personal authentication, wherein
• the detection device has
• a plurality of sensor elements,
• a plurality of gate lines and a plurality of signal lines provided in correspondence with the sensor elements, and
• a gate line drive circuit scanning the gate lines,
• the authentication device has
• a memory storing therein a sensor control code controlling the sensor elements and registered living body information as living body information registered in advance,
• a sensor control code setter configured to set the sensor control code when receiving, from the detection device, an authentication request signal to start authentication, and
• a communicator configured to transmit the sensor control code to the detection device,
• the sensor control code includes a plurality of selection modes of the gate lines, and
• the gate line drive circuit scans the gate lines based on the sensor control code received from the authentication device.