Automobile headlights, commonly known as "headlights.". The "soul" of headlight is its light bulb. Its performance will affect the effect of night lighting, directly related to driving safety. The service life of ordinary halogen headlamp is about 4 to 6 years. It depends on the night you drive and the time you use the headlights (day or night). HID light bulbs have no filament, so they have a longer life (10 years or more), while LED headlights have no filament or glass bulb, and will last tens of thousands of hours, which is usually the life of the vehicle.

The automobile has been born for more than 100 years, and it is also an era of rapid development of human scientific and technological capabilities. With the advent of the electrical age, the electrical components of the car have also undergone tremendous changes, the most representative of which is the development and evolution of the vehicle headlights. Do you know its functions?

The design principle of automobile headlamp is to determine the refractive index of astigmatic mirror glass, the required diffusion angle and the width of the folding surface of small astigmatic mirror, and then calculate the surface size of the inner surface of the astigmatic mirror.

The headlamp mainly includes semi enclosed, enclosed, detachable and projection type headlamps. The semi enclosed headlamp is fixed on the mirror by the teeth on the edge of the mirror. There is a rubber sealing ring between the two.

The demand for automobile lighting is getting higher and higher. Is it better to choose LED lamp or xenon lamp when refitting? Xenon lamp and LED headlamp are the most common lamps for lamp modification, but which one should be selected for low beam lamp modification?

​Many domestic cars are equipped with LED lights, even fog lights also use LED light source. The reason why the headlights are not popular is because of the cost. The configuration of headlights is different for different grades of cars.

Through appearance, it can distinguish the automobile bulb, the welding spot is smooth and firm, the lamp head is bright and free of scratches; the bubble shell has good transparency and no obvious gas lines and bubbles; the assembly of the visual filament, lamp head and bubble shell should be correct and symmetrical.

It is also easy to cause traffic accidents at night, so the headlight should be inspected regularly and the brightness of the headlight should be adjusted.

The automobile bulb indicator lights are respectively reverse gear indicator lights. When the reverse gear is engaged, the indicator lights up and the buzzer rings; when the reverse gear is exempted, the indicator lights down; the brake indicator lights and the brake indicator lights are installed in the instrument panel to indicate whether the automobile braking is normal or not; the parking brake indicator lights up when the parking brake lever is placed in the braking direction; when the lever is released, the indicator lights up.

Automobile lamps and lanterns are widely used in daily life. In 1985, LED automobile signal lamp first appeared on the bus. In 1986, the use of LED high mounted brake lamp on Nissan 300ZX automobile marked the official beginning of the era of LED automobile lamps.

The automobile light system is composed of low beam light, high beam light, driving light, fog light, reversing light and turning light. Low beam lamp, used when driving in urban area at night. In urban areas, there is a large traffic flow.

In case of heavy fog and haze, the car owner shall turn on the fog light clearance light in time to remind the rear car to pay attention to the position and size of the front car and avoid rear end collision. Under the condition of haze, do not use the high beam lamp, because the fog has a reflection effect.

Single light and double light on the automobile refer to a reflector or lens, which has the function of single low beam or high beam, or both. A double lens is also a single lens.

In order to increase the purchase mode of low, medium and high configuration of the vehicle, when the customer purchases the vehicle, he can purchase the bulb and lens by himself.

According to the data report, 70% of automobile accidents happen at night, of which 50% are caused by headlight source, water in headlight, low beam fading, yellow shade, too low light source, not far high beam, etc.

Take Audi laser headlamp as an example. The light source of laser headlamp is laser diode. Blue laser converts it into white light through scales, and irradiates it on a 3mm lens.

Now more and more people are refitting xenon headlights, but after refitting into xenon headlights, many car owners will have such concerns, whether it can pass the test? There are two headlamp tests. The first is appearance test.

The reason why the xenon lamp can't solve the problem is that the xenon lamp breaks through the gas in the bulb at a high voltage, while the battery in our car is only 12V. So we need to install something called ballast, which can increase the voltage at the moment of start-up.

There are the following provisions for automobile headlamp: the luminous capacity of low beam headlamp with rated voltage of 12V of motor vehicle shall be more than 1000-1200lm (LM is luminous flux unit: lumen), and the luminous capacity of high beam headlamp shall be more than 1450-1900lm.

Japan, which belongs to Asia, does not stipulate that fog lamps must be installed in vehicles, but decides whether to install them according to the needs of users. South Korea also does not force the installation of fog lights.