| 摘要 |
<p>A light emitting diode driver circuit is disclosed, which is capable of being driven stably. The light emitting diode driver circuit comprises: an LED array unit including a plurality of LED strings in which a plurality of light emitting diodes are connected to one another in series or in series and parallel; a DC-DC converter for supplying a drive voltage to the LED array unit; a regulation correction unit for output correction based on a feedback signal from the LED array unit; and a PWM signal generation unit for controlling an output voltage of the DC-DC converter using a signal supplied from the regulation correction unit, wherein the regulation correction unit includes a comparator, and a corrected voltage supply unit for correcting the output of the comparator during a voltage regulation section to detect the forward voltage difference between the LED strings and controlling the output of the DC-DC converter, based on a reference voltage corresponding to the highest forward voltage or the lowest forward voltage.</p> |
