| 摘要 |
<p>PURPOSE: A circuit for an empty light of a taxi is provided to increase reliability by dealing with the variation of power using a current limit unit. CONSTITUTION: A controller(30) outputs a control signal for controlling a light emitting diode(50), which represents the current state. An output unit(40) outputs an output signal according to the control signal of the controller. The light emitting diode generates light according to power supplied from the power supply unit and displays the current state according to the output signal of the output unit. A current limit unit(60) outputs the limited current to the output unit by limiting the current of the light emitting diode. A semiconductor switch unit(70) performs the switching operation for supplying the external power to the external load according to the control signal of the controller.</p> |
