DRIVING CIRCUIT FOR LIGHT EMITTING DIODE FOR CAMERA

摘要

PURPOSE:To commonly use the external connecting terminals of a control circuit and driving circuit with other actuators in the light emitting diode driving circuit for controlling the light emitting diode used in a camera by the integrated control circuit. CONSTITUTION:A motor 2 for opening and closing a shutter and a motor 3 for feeding a film are biclirectionally driven by transistors Q1 to Q6 controlled by the external connecting terminals P1 to P6 of the integrated control circuit 4 as the driving circuit. For example, the TR Q5 among the TRs constituting the driving circuit is built onto a current loop for supplying a driving current to the light emitting diode 5. The light emitting diode 5 is made to emit light without operating the other actuators 2, 3 if the TR Q5 is made conducting while the other TRs are held nonconducting. The driving of the light emitting diode 5 is thus controlled by commonly using the external connecting terminal P5 and the TR Q5.