| 摘要 |
A wiper control device comprising a wiper driving motor, a wiper switch having a continuous mode, a stop mode position, and an intermittent mode position, a predetermined position stop switch for detecting whether a wiper is placed in a predetermined standby position or not, the stop switch is placed in a detection state when the wiper is moved to the predetermined standby position, a driving circuit for holding an operation thereof for each period until the predetermined position stop switch is placed in the detection state, a main semiconductor switching element for switching the wiper driving motor, the switching element being inserted in a powering path provided for the driving circuit when the wiper switch is set in the intermittent mode position, an interval control circuit for periodically starting an operation of the driving circuit, an auxiliary semiconductor switching element for turning on to short-circuit both terminals of the wiper driving motor when the operation of the driving circuit is suspended, a current detecting circuit for detecting a load current flowing in the main semiconductor switching element, a response circuit for outputting a trip signal when a load current detected by the current detecting circuit exceeds a predetermined value, and a hold circuit for stopping the operation of the driving circuit when the response circuit outputs the trip signal.
|
