A Fast-Paced Smart Auto Lighting Technology: LED
As one of the most important active safety devices, automotive lighting plays a very important role in ensuring a safe driving experience. New technologies are developing very fast and today we see extensive use of new light sources including LED / LED modules, “smart” automotive lighting systems such as automatic bending lighting, headlamps that alternately provide driving beam and passing beam and adaptive front-lighting systems (AFS). But what are the challenges the LED poses to the Automotive industry?
These technologies bring us many advantages: better performance, less energy consumption, better reliability, shorter ramp up time, anti-vibration and shock, smaller size and more design possibilities.
Challenges of LED technologies
LED lighting solutions also bring some new problems. For LED light sources, the sensitive thermal characteristic influences the stability of photometric performance and UV-radiation from LED light sources may deteriorate light transmitting components.
Threrefore, thermal design, stability tests, usage of low-UV-type LED modules and UV-resistance tests of internal materials become extremely important. The newer versions of ECE Regulation No. 6, No. 7, etc., for signal lamps require one minute and thirty minute photometric tests for vehicles equipped with light sources other than filament lamp(s). Also, new ECE Regulation No. 112 introduces a set of tests for LED modules including color rendering measurement, UV-radiation measurement and temperature stability tests.
For these “smart” lighting systems, more complex structures and lighting “modes” are introduced. In a newer version of ECE Regulation No. 112 and No. 123, mechanical, electromechanical or other devices for headlamps, alternately providing driving beam and passing beam or bend lighting, are required to withstand endurance tests and function failure tests. For AFS, different “modes” are defined, Class C, E, V, W for passing beam. Each system shall provide a Class C passing beam and one or more additional class(es), and each class should fulfill the photometric requirements specified in ECE Regulation No. 123.
SGS-TUV Saar Homologation Experts in China are dedicated to research the new technology and requirements of automotive lighting testing and homologation. We offer consulting, training, testing, certification services for an increasing number of indigenous and foreign automotive lighting manufactures.
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