| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a light-emitting element drive device capable of saving power even in a case where there are variations in productions in forward voltage of a plurality of light-emitting element rows.SOLUTION: A light-emitting element drive device configured by one light-emitting element or a plurality of series-connected light-emitting elements to drive a plurality of light-emitting element rows 101-103 connected in parallel, comprises: a constant current drive circuit 200 applying a constant current to each of the light-emitting element rows; and a constant current value selection circuit 500 determining a current value of the constant current to be applied to each of the light-emitting element rows on the basis of a difference in forward voltage of the light-emitting element row.</p> |
