See the auto show on May 1st to understand the dev

2022-10-24
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Looking at the May Day Auto Show to understand the automotive lighting technology and industrial development

Abstract: for vehicles, in order to improve driving safety, in addition to strengthening the active/passive safety system, such as the number of airbags, rigid body structure, ABS/EBD/TCS and other intelligent braking systems, if you can provide good lighting effect at night, let the driver see the road ahead clearly, and believe that the chance of collision accidents can be reduced, Therefore, foreign car manufacturers, especially in Europe, have spared no effort in the research and development of headlighting systems

for vehicles, in order to improve driving safety, in addition to strengthening the active/passive safety system, such as the number of airbags, the rigid structure of the car body, ABS/EBD/TCS and other intelligent braking systems, if it can provide good lighting effect at night, so that drivers can see the road ahead clearly, it is believed that the chance of collision accidents can be reduced. Therefore, foreign car manufacturers, especially in Europe, have spared no effort in the research and development of headlighting systems, From the early kerosene lamps, later tungsten filament lamps, hid and LED headlights, to the latest laser headlights, the current development has exceeded most people's imagination. What is the difference between these headlights? Let me introduce it one by one

1886

kerosene lantern

when the car was first born, it had almost no function and ran very slowly. In addition, few people drove out at night, so it was not equipped with lights at the beginning. However, it is said that in 1887, when a driver got lost in the dark wilderness, he used kerosene lantern to illuminate the way home, so it became the earliest light equipment in the history of the car

1905

fuel is the main fuel

perhaps because the illumination brightness is too low, so that the kerosene lamp is soon replaced by acetylene lamp. Acetylene lamp is also known as electro soil lamp, which is different from kerosene lamp. Kerosene lamp uses kerosene as fuel, and the light is weak; Using the chemical reaction produced by adding water to the battery as the fuel, the lighting degree of the battery lamp is brighter than that of the kerosene lamp, and the acetylene lamp is less likely to be blown out by strong winds, so it is very suitable for lamp lighting

1925

tungsten filament lamp

with the invention of tungsten filament lamp, the durability was improved, and acetylene lamp began to withdraw from the stage of lamp history, replaced by increasingly mature spiral tungsten filament lamp. Compared with carbon filament lamp, the lighting brightness of this bulb was fully increased by 50%, which really began the history of the development of automotive lighting electrification

1990

hid bulb

in the 1990s, the professional lamp manufacturer Hella introduced the mature technology h Xinte experimental machine company, which specializes in consuming all kinds of experimental machine equipment ID bulbs to the market, which brought the lamp lighting to a new level, and also broke through the brightness limit of tungsten light-emitting bulbs, making the lamp lighting brightness significantly exceed the past level, but the newly applied hid will cause glare to the driving of vehicles, This is a hidden danger for driving safety, so the automatic headlamp height adjustment system will be introduced later

2009

the fourth generation of lighting source LED lamps

hid xenon headlights because the cost reduction speed is too slow, coupled with the current white LED luminous efficiency gradually surpassing hid, the price is also declining in multiples year by year, and the commercialization maturity is also getting higher and higher. Therefore, it is expected that hid will gradually be replaced by LED lighting technology in the future market development, which also makes LED lamps known as the fourth generation of vehicle lighting sources

2014

laser headlights

what is laser (laser) headlights called after LED headlights? Whether it is the equipment can depend on the noise of the equipment "reasonable next step". The principle is that the blue light of the laser LED will penetrate the fluorescent powder material in the headlamp unit and convert it into a diffused white light. It is more energy-saving and fuel-efficient, and it will be popularized for a long time

in the future, the development of headlights will be carried out in the way of combining hardware with software. In the hardware part, through the application of LED or laser lighting technology, headlights will not only have higher brightness and longer irradiation distance, but also be more energy-saving and more avantgarde in appearance. The software part began to be combined with the electronic detection system, so that the position of the vehicle in the opposite direction or in front that cannot be illuminated can automatically block out light (turn off some LED bulbs), so that they and others can have a safer night driving environment. This development is believed to continue to evolve in the future, and it is also expected that LED headlights, like the HID headlights in the past, can be gradually popularized on affordable vehicles

four kinds of automotive lamps, the most critical of which is the comparison of human transformation and upgrading performance

1, halogen headlights

nowadays, halogen lamps used in cars are upgraded versions of incandescent lamps, but halogen elements are added to them. Halogen lamps can improve brightness and have a long service life

when driving at night, if you find the light yellow, it is a halogen light. Halogen lamps are not as conspicuous as xenon lamps, but normal lighting needs can still be met

2. Xenon headlamp

the abbreviation of xenon lamp is hid, which is a lamp form used in high-end models. The brightness of xenon lamp is higher, which is three times that of halogen lamp, and it is more power-saving. It is different from the light-emitting principle of halogen lamp. There is no filament, and the xenon in the bulb is stimulated by high-voltage positive and negative electricity to produce chemical reaction and light-emitting with rare metals. When you meet someone, you will feel that others' car is dazzling, but in rainy and foggy weather, the penetration of xenon lamp will decline, and the irradiation effect is not as good as halogen lamp. Xenon lamp is favored by many consumers because of its high brightness and easier recognition

3. LED headlights

led lights are also used in cars after they are popularized in offices, homes and other places. LED headlights are energy-saving and environmental friendly, and their energy consumption is 1/20 of that of halogen lamps. They are low-cost, long-life, and do not love bad. In fact, they are light-emitting diodes, which use solid semiconductor chips as light-emitting materials to emit light through carrier recombination and photon emission

now many cars use LED lights as daytime running lights and clearance lights. It saves electricity and has a long service life, and it is also the brightest of the three lamps. Therefore, many models will choose it as the lamp

4. Laser headlights

the light source of laser headlights is generated by laser diode, which is widely used in measurement, electronics, communications, medicine, processing and other industries. Laser headlights have most of the advantages of LED headlights, such as fast response, low brightness attenuation, small size, low energy consumption, long service life and so on

compared with LED headlights, laser headlights have advantages especially in volume. The length of a single laser diode element can reach 10 microns, only 1/100 of the size of conventional LED elements, which means that as long as designers are willing, the size of traditional car headlights can be greatly reduced, which may bring revolutionary changes to the design proportion of various elements on the front face of the car

laser lamps have the characteristics of fast response, energy saving, small size, long service life, low brightness attenuation, which is also the inevitable trend of future lamps. Its irradiation range is 600 meters, which is unmatched by the other three kinds of lamps. At present, both BMW and Audi have launched models equipped with laser lights

led automotive lighting industry chain

according to the statistics of the Traffic Management Bureau of the Ministry of public security, by the end of 2016, the number of motor vehicles in the country had reached 290 million, including 194 million vehicles. The huge car ownership brings imagination space for the development of automotive aftermarket and interconnected car maintenance, and also brings broad development prospects for automotive lighting

1. Chip

due to the high requirements of automotive LED for chip power and reliability, and the advance layout of major international chip and packaging manufacturers, the current LED chip manufacturers in the market are mainly Lumileds, OSRAM, Nichia, etc., especially high-power chips for automotive headlamps

2. Packaging

in the packaging link, cob packaging can meet the needs of high system integration of automotive lighting light source modules, so it accounts for an increasing share in automotive LED devices. At present, automotive LED device suppliers are dominated by international major manufacturers such as Kerui, Nichia, Lumileds, especially for headlamp devices

Taiwan, China enterprises Yiguang, tongmingliang, etc. are also actively expanding the market. The main packaging enterprises in the mainland, Mu Linsen and Guoxing optoelectronics, have also begun to layout the automotive LED market, mainly seizing market share in taillights and other fields. China's major LED packaging enterprises are also making efforts in various ways. Note: when the experimental machine has special requirements, the lighting market attempts to gradually break the monopoly situation, but it is still mainly installed later, and the market share is small, so it will take time to enter the front installation market

3. LED light source module

vehicle LED light source module includes one or more LED chips, mechanical and optical components and drive modules, connectors, radiators, etc., with a high degree of integration

internationally renowned OSRAM, Toyota synthetic, Xiaosi, Lumileds, Kerui and other manufacturers began the research and development of automotive LED as early as the 1990s, and have invested heavily in research and development in recent years, forming a complete production system of automotive LED light source series products

at present, there are only a few manufacturers of LED automotive light source modules in China. BYD has a complete industrial chain, so the lamp modules in its brand models are self-produced. Taiwanese manufacturers such as Liqing actively enter the field of automotive lighting, cooperate with major lamp manufacturers in the mainland, and layout the front loading market

4. Lamps

in the part of lamps, due to the relatively closed supply chain between lamp manufacturers and automobile manufacturers, especially the high threshold requirements of automobile headlamps in terms of heat dissipation, reliability, brightness and so on, the largest market share of LED automotive lighting is the large traditional lamp manufacturers, such as Xiaosi, Haila, Valeo, Stanley and so on. These manufacturers have a relatively fixed supply relationship with most international first-line car manufacturers, so it is difficult for Chinese lamp manufacturers to enter

nevertheless, Chinese lamp manufacturers are still actively looking for entry opportunities, starting with interior lamps with low technical threshold, gradually turning to applications such as fog lamps and tail lamps, and finally developing high margin headlamps

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