초록 ▼

A drive circuit system includes an opening control circuit Eo adapted to close an opening relay to drive a motor in a window opening direction by operation of a control switch to an opening position, and a closing control circuit Es adapted to close a closing relay to drive the motor in a window clo

A drive circuit system includes an opening control circuit Eo adapted to close an opening relay to drive a motor in a window opening direction by operation of a control switch to an opening position, and a closing control circuit Es adapted to close a closing relay to drive the motor in a window closing direction by operation of the control switch to a closing position. The opening control circuit Eo and the closing control circuit Es include final output stage transistors To and Ts, respectively, each of which comprises a PNP-type transistor. When the drive circuit system becomes wet due to the entry or condensation of water or liquid, a leak current I is permitted to flow simultaneously between bases of the final output stage transistors To and Ts and ground 2. Both of the transistors To and Ts are simultaneously turned on to close the opening relay and the closing relay. As a result, opposite ends of a motor are brought into high-potential states, so that the motor cannot be driven, thereby preventing the unintended opening and closing of the power window.

대표청구항 ▼

[ What is claimed is:] [1.] A drive circuit system for a power window for driving a motor for opening and closing the power window, the drive circuit system comprising:an opening relay for connecting said motor to a power source in order to drive said motor in a window opening direction;a closing re

[ What is claimed is:] [1.] A drive circuit system for a power window for driving a motor for opening and closing the power window, the drive circuit system comprising:an opening relay for connecting said motor to a power source in order to drive said motor in a window opening direction;a closing relay for connecting said motor to said power source in order to drive said motor in a window closing direction; anda control switch connects a coil of said opening relay to said power source by operation thereof in the window opening direction and to connect a coil of said closing relay to said power source by the operation thereof in the window closing direction,wherein when said drive circuit system becomes wet, said opening relay and said closing relay are simultaneously closed by a leak current.