![]() ![]() Melexis already has considerable experience in the development of LIN-based LED automotive systems. The Melexis solution for smart automotive lighting At the same time, manufacturers do not wish to limit such exciting new features to their high-end cars, and so are looking for high performance at a low cost.įurther challenges include: ensuring the necessary flexibility in the car architecture for smart lighting without reprogramming the body control module managing safety-critical applications ensuring overall system EMC and ESD robustness in such a harsh environment and fulfilling space requirements to fit smart lighting in any location within the car. In parallel, the number of RGB-LED stripe manufacturers is increasing, making system integration even more complex, especially when different color sensitivities need to be adjusted separately. The communication speed and architecture of LIN makes it a feasible solution for slow animations, but not for high-speed applications. The latest CAN protocol – CAN-FD – has sufficient bandwidth, but because of its architecture and requirements it is too expensive from a Bill of Materials point of view and too limited in regard to the number of possible connected LED drivers. To put it simply, tomorrow’s cars are likely to contain too many LEDs changing color too rapidly and too frequently for the current CAN and LIN technologies to control efficiently. LIN is the Local Interconnect Network a supplement to CAN which allows for further expansion to peripheral devices. ![]() CAN is the Controller Area Network the bus that allows components in an automobile to talk to each other seamlessly. Notably, the capabilities of the current CAN and LIN communication protocols are insufficient. Once smart lighting effects become specified for both styling and communication purposes, certain technical challenges arise. ![]() The challenges inherent in smart lighting Consequently there is a growing trend towards increased static lighting, multi-color ambient lighting, and more complex animated lighting in cars, all of which could be grouped under the description “smart lighting.” In addition, visual signals are vital for people with hearing disabilities. In such cases, the interior suddenly changing red could alert the driver to take control of the car. Typical examples could be when the driver is using headphones, or is in a telephone conversation. With the arrival of autonomous driving, this aspect of lighting is likely to intensify, to address situations in which audio signals may be unheard. We are all familiar with lights that warn of a hazard or emergency. Light has an ever-increasing role to play in the communication of information. Light has long been allied with comfort, due to its strong influence on a person’s emotions: warm colors can induce passion cold colors can bring calm. Never before has the spotlight shone so brightly on automotive lighting. Melexis has addressed the difficulties OEMs are facing when handling high-speed bus and multi-channel LED and RGB-LED drivers, by developing their own innovative standard protocol. ![]()
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