| 摘要 |
PURPOSE:To give the scanning to the state of the serial connection of the switch and the diode provided at intersections of the m-row and n-column wiring along with the detection given at several areas and then to drive the load corresponding to the switch and via the signal. CONSTITUTION:The pairs formed by inserting the diodes in series to switches S11-S55 within switch blocks 25-28 are connected to the intersections between row wirings l10-l50 and column wirings l01-l05. Active junction box AJB29 and 40 turn one of the row wirings, such as l10 the positive potential, and then give the zero-potential to l20-l50. Then the positive potential is secured for l20, and the zero-potential is given to others to carry out the scanning. And the monitor is given to the potential of wirings l01-l05 at each time point, thus driving loads L11-L55 corresponding to switches. In such wiring method, the operation switch close to the driver's seat is defined as the switch part, and AJB29 and 40 are attached to both walls of the driver's seat. Thus the number of pieces can be reduced for the wirings at the cowl part. |
