Light source device and electronic device

An electronic device comprising:

• a first resistor that is connected to a given potential;
• a light emitting element that is connected in series to the first resistor;
• a second resistor that is connected to the given potential;
• and
• a first current source that is connected in series to the second resistor and that is configured to supply a freely-selected current within a given range,
• a controller configured to generate a drive current that drives the light emitting element and performs drive control on the light emitting device;
• and
• a detector configured detect the drive current based on a first voltage that is taken out from a first connection part where the first resistor and the light emitting element are connected to each other, a second voltage that is taken out from a second connection part where the second resistor and the first current source are connected to each other, and the freely-selected current,
• wherein the controller is configured to determine whether an overcurrent is supplied to the light emitting element based on the drive current that is detected by the detector.