| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a light-emitting element drive circuit that can shorten delay time from the input of a light emitting signal to sufficient light emission by the light emitting element. <P>SOLUTION: A power supply circuit 2 is brought into operation in advance so that so small a current (a primary current) as not to cause a Light Emitting Diode 3 (LED 3) to emit light may flow through the LED 3, and by entering a light emitting signal SL, the current running through the LED 3 is changed to a current (a secondary current) with a current value required for the LED 3 to emit light. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
