| 摘要 |
PURPOSE:To enable the indication of a hazard even if an ignition switch is off, by providing a hazard switch in parallel with the ignition switch to put a constant voltage generator into operation in response to the signal of the turn-on of either of the switches. CONSTITUTION:When an ignition switch 11 is turned off at the stoppage of a vehicle, a constant voltage vanishes from a constant voltage generator 23 so that an input processing circuit 50, an AD converter 60, a microcomputer 70 and a drive circuit 80 are put out of operation. As a result, an indicator 90 cannot perform indication. A hazard switch 12 is then turned on to generate the constant voltage again in response to the signal of the turn-on of the switch so that the microcomputer 70 resumes the execution of an indication control program. As a result, a hazard can be shown by the indicator 90 comprising liquid crystal display elements, a CRT and field-effect light emission elements or fluorescent display tubes. The hazard can thus be indicated even if the ignition switch 11 is off. |
