طراحی نوری لامپ های جلو خودرو مبتنی بر LED
|کد مقاله||سال انتشار||مقاله انگلیسی||ترجمه فارسی||تعداد کلمات|
|58127||2013||5 صفحه PDF||سفارش دهید||2147 کلمه|
Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)
Journal : Optics & Laser Technology, Volume 45, February 2013, Pages 262–266
In order to solve the problem of high cost and low optical efficiency of current LED-based headlamps, we introduced a new optical design approach for LED-based automotive headlamps. In this configuration, 48 pieces of LEDs are used to build a LED array and the measuring screen is divided into multiple blocks to allow each LED to illuminate a block. A kind of secondary optical lens for a single LED is used so that the lights radiated from a single LED can form a rectangular beam region, whose optical efficiency is above 85% in theory. Lighting up different LEDs can illuminate different blocks, so as to realize low-beam and high-beam lighting. Ray tracing simulation results fulfill the low-beam and high-beam optical demands of the regulation. Since low-power LEDs need no additional reflectors, cost lower and obtain higher efficiency than high-power LEDs, this configuration achieves high reliability installation and can partially realize the functions of Adaptive Front-Lighting System (AFS).