LED測光式楔形導光條應用於車尾燈設計

Design of LED Edge-lit Wedge Light Guide Bar for Taillight Applications

本研究在於探討LED結合側光式導光條於汽車尾燈的應用，利用透鏡縮小LED發光角度，使光進入楔形導光條，並分析其導光特性做結構最佳化，以符合應用於汽車車尾燈裝置。運用3D繪圖軟體Solidworks設計導光條模型，再利用幾何光學之光線追跡法做分析，依據分析結果修正模型的導光結構，進而改善光利用率與照明均勻性，經過設計後不僅提升整體光利用率達82.16％，且照明均勻性也大幅提高達93.45％。

We introduce an automotive vehicles taillights module, which consists of a wedge light guide bar, lens, and light emitted diode (LED). The LED light is focusing coupled to the edge of the light guide bar by a lens. The wedge light guide bar is designed with a prism structure at the bottom to ensure light rays come out from the top face. The overall light utilization efficiency is improved by the combination of a small divergence light source and a wedge light guide bar. This taillights module is designed by a 3D graphics software Solidworks and analyzed by the ray tracing method. We propose an efficient algorithm to increase the lighting uniformity by modifying the prism structure. The overall light utilization efficiency is 82.16% and the lighting uniformity is substantially increased to 93.45%.