日前,我国汽车的仪表盘均有汽油表、电流表、水温袭和机油压力表。夜间行车时,由仪表灯照明观察仪表,以了解汽车发动机的工作状态。但我们在长期的实践中体会到,仪表灯照明的效果并不十分理想,致夜间行车过程中观察仪表很困难。机油压力表在仪表盘的诸 Recently, the dashboard of our car has gas meter, ammeter, water temperature and oil pressure gauge. When driving at night, by the instrument lighting observation instruments to understand the working status of the car engine. However, we have realized in the long-term practice that the effect of the instrument light is not very satisfactory and it is very difficult to observe the instrument during the night driving. Oil pressure gauges in the dashboard