In the 80 s has been widely used in household electrical appliances, such as audio volume indicator, switch directions, and so on. In the 90 s, some new type of domestic automobile instrument also has the LED, mainly used for charging indicator, and later display engine speed conditions, such as hubei xiangfan production a combination of instrument and meter side vertical a row of LED, when the driver step on the gas in LED lights went from the first row in turn light, when loose when the LED light row from up to down, in turn out quite eye-catching good-looking. In the 90 s, China's use of LED to high brake light and installed in the car, due to the LED light on fast, we can let the shadow behind the car drivers know ahead of the vehicle driving condition, reduce car tracing cauda collision accident.