What Is an IR LED Illuminator?

LED car lights refer to car lights using LED (light emitting diode) as the light source. Because LEDs have the characteristics of high brightness, rich colors, low power consumption, and long life, LEDs are widely used in the automotive field.

LED Car Light

LED car lights refer to the use of LED (

Most ideal

1: Long life, generally up to tens of thousands or even 100,000 hours. Some people think that if future car lighting uses LEDs, the entire life of the car will not need to be replaced.

Two: high efficiency and low energy consumption. The LED light source can directly produce red, amber and other colors required by automotive lamps without color filtering, without loss, and the power utilization rate is over 80%.

Three: The light quality is high, and it belongs to environmentally friendly products. There is basically no radiation and "green" light source.

Four: The structure of the LED is simple, the internal bracket structure is sealed with transparent epoxy resin around the periphery, and the seismic performance is good.

Five: No delay in lighting, fast response speed (nanosecond level), suitable for fast moving objects.

Six: suitable for low voltage work, can be applied to cars.

Seven: The LED occupies a small volume, and the designer can freely change the lamp mode to diversify the car shape. Car manufacturers favor LEDs, which is entirely determined by the advantages of LEDs themselves.

One: the cost is high. Take the LED reversing light as an example, one LED reversing light is nearly 30 yuan, and the price of a light bulb is only 3 yuan. Many of them are the cost of LED lights. High prices cause ordinary cars to be unable to mount LED lights, and the market cannot be promoted.

Two: LED car headlights are difficult to popularize, the heat dissipation is not good, and the heat treatment is not easy to cause light decay. Affects the service life of the lights.

3: There are no industry standards, and product quality is uneven;

Fourth, the light design is a little difficult;

5. It is not suitable for long-term lighting. If long-term lighting is used, simple heat dissipation design should be considered;

6. Poor maintenance performance;

7. The point light source has a certain gap between the appearance of the lamp and the bulb we are used to, and people's acceptance is challenged.

Reliability and service life

2. Efficiency / lumen per watt

Compared to standard incandescent lamps, LEDs consume more light output per unit of power consumed. But when compared with halogen lamps, the actual light output advantage of LEDs is not obvious. The latest LEDs have excellent lumens per watt, but some values are obtained under optimized conditions and are usually not obtained at the highest output conditions. Generally speaking, when the LED current increases, the light output does not increase linearly. Therefore, even if the LED outputs x lumens at a current of 0.5A, it will not output 2x lumens at a current of 1.0A.

3. Response speed

Take the brake light and the direction indicator tube as an example. Assuming the vehicle speed is 125 km / h, that is, 35 meters / second, the hot start time of the incandescent lamp is about 250 milliseconds, and the fast-responding LED can be emitted at a distance of about 8 meters earlier. Brake warning to effectively avoid car collision. The same goes for the lights.

Directionality

Another key feature is how the LED emits light. Unlike incandescent lamps, LEDs only emit light through one surface, which is good for headlight and chart light applications, but may not be suitable for other lighting applications for cabin lighting.

LED driving methods can use resistance current limiting, linear regulator and switching converter 3 types. The resistor current limiting scheme is suitable for low efficiency applications, so it requires high efficiency and this method is not used in automotive lighting with a wide input voltage range; linear regulators are suitable for low current or LED forward voltage drop slightly lower than the power In the case of voltage, there are also problems of small efficiency and input voltage range. Switching converters have the characteristics of flexible circuit topology, high efficiency and wide input voltage. Therefore, comprehensive consideration of work efficiency, installation size,

Pay particular attention to the thickness of the wiring when selecting LED car lights. It is recommended to choose a thicker wiring harness. This can ensure that it is not easy to be burned out during use. At the same time, pay attention to the concealment of the wiring during installation and do not expose it Outside, avoid leaving safety hazards. In addition, the factors that affect the lighting efficiency and life of LED cars are mainly temperature. Therefore, owners who want to modify LED lights are advised to choose LED lights with good thermal conductivity, and pay attention to the heat dissipation environment of the surrounding environment of LED lights in the future during installation. It is worth mentioning that the modified owner must not damage the appearance of the original car. Once the appearance is changed, there will be trouble during the annual inspection. "

It is an extremely quick and simple task to check the LED car lights and lighting bulbs for burnout. However, it is not so simple to perform a comprehensive system maintenance on the car's external lamps. The timely maintenance of external lights is important for the driver, because it not only affects the comfort of the vehicle, but also directly affects the safety of the vehicle. It's often difficult for owners to realize that headlights, taillights, turn signals, or parking lights are no longer functioning before being alerted. Incidentally, the work of replacing burned out bulbs is very simple, and the cost of DIY is lower than the charging standard for maintenance of lighting systems in repair stations.

In many cases, the failure of a car light is not limited to small problems such as burned bulbs, rusted sockets or damaged plugs. Professional diagnostic techniques are often required to analyze the root cause of the failure. Even for low-priced cars, the internal and external lighting is controlled by the host computer. For those luxury cars, the headlights are controlled by three computers.

If the car is equipped with a DRL, you must first understand how these devices work. For example, some daytime running light systems cannot turn on the daytime running light before the engine is started; and some daytime running light systems, if the parking brake has not been cancelled, even if the engine has been started, the daytime running lights still cannot work normally. If the vehicle is equipped with light control lights (that is, the system has the function of automatically turning on the headlights when the ambient light is dim to a certain degree), it may be useful to check the working conditions of the lights during the process from the weakest to the strongest, of course Also don't ignore checking the auto-off timer. If your system is equipped with a timer, set it to the maximum delay.

If the headlights are damaged, they are usually replaced with similar ones. Some cars are equipped with a high-intensity discharge headlight HID, which generates high-density light sources through high-voltage arc discharges generated by its predesigned electronic system. Note that ordinary quartz-halogen bulbs cannot be used here. In addition, check whether there are cracks in the headlights, because although the surface cracks will not affect the lighting performance of the headlights, moisture will penetrate the lamps along the cracks, which will inevitably reduce the service life of the bulb.

The calibration of the headlight light direction should also be included in the list of maintenance items, because in order to ensure the maximum safety of the driver, the headlights must be able to provide good forward lighting for the driving vehicle.

While seizing the key, you must not forget to check other lights, such as turn signals, license plate lights, width lights, parking lights, reversing lights, and brake lights (including the middle high brake light CHMSL). In addition, many vehicles also use fog lights as standard equipment or popular options. Fog lights are generally installed in a lower position on the car, so they are extremely susceptible to stone damage. In addition to checking the lighting system, In addition, the cracks of the headlights should not be ignored.

Automotive headlights mainly include halogen, xenon, and LED. Among them, halogen headlights are mainly used in low-end cars. Xenon headlights are common in some high-end vehicles, and LED headlights are only used in a very small number of new vehicles.

Due to the fast volatilization speed of halogen headlamps, the brightness will decrease with the increase of the use time until the fuse is blown. The general design life is 2-3 years, and the life of xenon lamps is generally doubled, which can reach 5-6 years. As for the life of the LED is relatively long, it can fully support the car scrap.