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1887

access icon free Study and implementation of the LED headlight driver with auto-start function in specific location

© The Institution of Engineering and Technology
Received 08/03/2016, Accepted 05/09/2016, Revised 17/08/2016, Published 05/09/2016

Conventional automatic headlight devices determine whether to switch vehicle headlights on or off according to the brightness of the environment. These devices cannot automatically switch on headlights during daytime unless the headlights are required in specific road conditions (e.g. mountainous or foggy areas), thus compromising the safety of road users and drivers. This study develops a light-emitting diode (LED) headlight system that integrates the global positioning system (GPS) and a controller area network (CAN) bus communication interface. This system uses the GPS system to analyse the geographic location and then determines whether to switch on the LED headlight. To reduce the system complexity, a CAN bus is used to limit the number of control wires required. The LED headlight driver also uses an interleaved boost converter that has low conduction losses and input ripple currents, which improves the conversion efficiency of the headlight drivers and extends the battery lifetime. The feasibility of the proposed technology is verified using experimental results.

Inspec keywords: controller area networks; automotive electronics; lighting control; field buses; road vehicles; geographic information systems; driver circuits; LED lamps; power convertors; road safety; Global Positioning System

Other keywords: light-emitting diode headlight system; driver safety; geographic location analysis; battery lifetime; road users safety; vehicle headlights; interleaved boost converter; control wires; automatic headlight devices; environment brightness; road conditions; CAN bus communication interface; LED headlight driver; input ripple currents; controller area network; GPS system; system complexity reduction; conversion efficiency improvement; global positioning system; autostart function; conduction losses

Subjects: Automobile electronics and electrics; Geography and cartography computing; Instrumentation buses; Control engineering computing; Power electronics, supply and supervisory circuits; Light sources; Road-traffic system control; Light emitting diodes; Radionavigation and direction finding; Instrumentation buses and protocols

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