Organic electroluminescent light emitting device for restoring normal operation after low-voltage errors

摘要

Provision of a light emitting device having functionality for restoring to normal even if a low-voltage error occurs, by temporarily applying a reverse current to a low-voltage error light emitting element using a direction inverting circuit, and repairing portions in which impedance has fallen by applying the current.;An illuminating device of a light emitting device using a lamp (light emitting element) is provided with a control power source circuit for generating a control voltage, a step-down chopper circuit for converting a direct-current voltage into power needed for the lamps comprising organic electroluminescent elements as light emitting elements, a lamp current detecting circuit for detecting a current flowing to the lamps, a direction inverting circuit including a plurality of lamps and capable of inverting the direction of the connection of the plurality of lamps, a control circuit for generating a control signal for supplying desired power to the lamps, and the lamp current command circuit for controlling the current flowing to the lamps.