| 摘要 |
<p>PURPOSE: A light-emitting element drive controlling circuit is provided to suppress the sub harmonic oscillation by making a transistor turned off for a predetermined time. CONSTITUTION: A light-emitting element drive control circuit(10) comprises control circuits(43,44), peak detection circuits(40,41), and a control signal generation circuit. The control circuit turns the transistor(30) on/off. The transistor controls the variation of a driving current of the emitting device. The control circuit is serially connected to the emitting device and an inductor. The peak detection circuit detects the maximum value of the driving current. The control signal generation circuit generates a control signal. The transistor is turned on/off by the control signal.</p> |
