Automotive LED lighting development, as well as automotive LED lighting advantages and disadvantages analysis!

With the development of automobile technology, automobile lamps gradually developed from the most primitive incandescent lamp to halogen lamp, xenon lamp and LED lamp. In recent years, LED technology plays an increasingly important role in automotive lighting system, from the initial automotive interior lighting such as instrument lights, backlight lighting, reading lights and other basic lighting applications, gradually developed to external lighting such as near and far lights, daytime running lights, turn signals, high brake lights and combined taillights.

At present, taillights have been basically applied in all car models, and near-far lights are gradually maturing. Intelligent LED headlights and laser headlights will be the development trend of automotive lamps in the future. Although LED light source is a very ideal light source, but completely replace the traditional light source still needs a certain transition period. Due to the high production cost of LED light source, the technology needs to be improved and the regulations are not perfect, so it will take some time for LED to be fully applied in automobile headlights, and it is not realistic to completely replace halogen and xenon lamps at the present stage.

But LED technology in continuous progress, the use of cost decreased year by year, in the automotive lighting wide and comprehensive application is only a matter of time. Safety, environmental protection and intelligence are the development trend of LED car lights. In the future, there will be more advantageous lighting technologies such as laser lighting to drive the continuous progress of automotive lighting technology.

Advantages of automotive LED lamps

At present, the mainstream headlights on most cars are halogen and xenon lamps. Compared with traditional headlights, LED lamps have the following advantages:

(1) Energy saving and environmental protection: LED car lights require low voltage and small current under the same brightness, so they are more energy saving than traditional halogen lamps and xenon lamps, and their energy consumption is only 1/10 of that of traditional lamps. LED lamps do not contain mercury, lead and other environmental pollution elements, and low energy consumption, can reduce fuel consumption, prevent car electricity passing through the current caused by damage.

(2) Adjustable brightness and light color: LED lamp designers can adjust the brightness and light color according to needs, the lamp mode can be changed at will, the shape is more fashionable and diversified.

(3) Long service life, good shock resistance: the theoretical service life of current automotive LED lamps can reach 60,000-100,000 hours, the actual service life of many automotive lamps has reached the current limit; LED structure in less vulnerable parts, good earthquake resistance.

(4) Small size and light weight of LED components: this advantage allows automobile manufacturers to be more flexible in lamp design, with higher luminous purity and clearer and brighter colors.

(5) Outstanding safety: There is no delay in lighting the taillight, and the response time is faster than that of traditional lamps. LED taillight response time is only a few tens of nanoseconds, faster response time can enable the driver behind the earlier response; Prevent blinding interference when meeting the car, will not cause the driver’s visual obstruction, to achieve the purpose of reducing the occurrence of traffic accidents.

Disadvantages of automotive LED lamps

(1) Poor heat dissipation: heat dissipation is one of the technical problems of automotive LED lamps and lanterns, and LED lamps and lanterns will appear light failure because of heat dissipation is not up to standard. Because LED chip is small and heat conduction is poor, LED grain temperature is too high, the luminous efficiency will be reduced or even damaged.

(2) High price: THE production of LED chips is difficult, demanding for the environment such as temperature and humidity, so the production cost is high, the price is relatively high. Higher costs have hampered its popularity in the market. In a mid-range car, for example, the combined LED rear light costs almost twice as much as the traditional incandescent rear light.

(3) High maintenance price: expensive maintenance cost is one of the reasons why LED headlights are difficult to popularize at this stage. Although the theoretical service life of LED is very long, but once an accident occurs, the cost of maintenance will be as high as thousands. Because if the LED lamp bead is damaged, you need to replace the entire headlight assembly if you want to repair it. This has LED many car owners to opt for xenon or halogen lamps instead of LED headlights.

(4) Light radiation: light radiation is a common problem of LED lamps, and LED car lights at this stage are inevitable. In the design of LED headlamp, the potential photobiological radiation hazard of LED products needs to be avoided, among which blue light will cause harm to human cornea to a certain extent, and flicker and photobiological action will also cause harm to human body. With the development of LED technology and automotive lamps, LED car lamps should not only meet the technical requirements of automotive lamp design, but also meet the requirements of automobile users’ aesthetic feelings, and more importantly, meet the safety requirements of no radiation to human body.

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