The led lights lamp structure of the modern automobile is increasingly complex, increasingly sophisticated technology, the functions become more perfect. The heart of the automotive lamp light source, the evolution of the automotive lighting has gone through four stages, the fourth generation of the LED automotive light sources, and far-reaching impact on the change of car lighting.
The first generation of automotive light sources is the direct combustion of fuels (candles, kerosene or acetylene) light, it can meet the requirements of the early lights, but there are low luminous efficiency, light intensity, performance, instability, complexity of obvious shortcomings.
The second generation of automotive lighting is incandescent: 1879 Edison invented the incandescent lamp, 1913, the first incandescent lamp technology used in the Cadillac automobile headlamp, auto lamps have undergone a revolutionary change, from the automotive lighting into the electrical age. Then, has appeared in the car mirror, starter, generator and battery technology, the 1925 car is truly entered the era of incandescent automotive lamps. 1950s, halogen, it soon became the car strong light bulb such as led street lights.
The third-generation automotive lighting gas discharge lamps (HID): It has the advantages of high luminous efficiency, high brightness and high reliability, will replace incandescent, halogen and a new headlamp light.
The fourth generation of automotive lighting is LED: LED is a semiconductor PN junction diode, the PN junction when a forward bias imposed by the PN junction at both ends, are excited carrier by low-energy state transition to the high-energy state, when in the energy state of the instability of the carrier back to the low-energy state complex, according to the conservation of energy
Management, the excess energy will be the photon released in the form, it is LED electroluminescence principle. It is not warming through the heat can make objects glow, direct conversion from electricity to light, the energy difference of the emission wavelength depends on the carrier that is, the high-energy states and the difference between the low-energy state.
As for the interior light, more and more use of the LED, auxiliary lighting, LED interior lights, and dashboard LED backlight.
LED auto lamps before the basic structure consists of five parts: 1.LED array, two mirrors, 3. With light microscopy, 4 radiators, 5. Drive circuit.
LED car lamps directly associated with the development of the LED light source, only when the technology advances in LED lighting, LED light source applications in front of the car lights will be more popular. Future LED lamps with the LED to improve the quality, the price drop, LED light will break out again lighting revolution, a landmark, it will further affect the change of car lighting.