一種便于電源驅(qū)動(dòng)控制的LED光電模型
何楊，徐玉珍
（福州大學(xué) 電氣工程與自動(dòng)化學(xué)院，福建 福州 350108）
摘 要：根據(jù)LED電路等效模型和光、電、熱相互作用原理，研究了LED正向電壓Ud（Tj，Id）數(shù)學(xué)模型。通過將結(jié)溫Tj等溫度變量轉(zhuǎn)換為易于控制的電學(xué)量，得到以正向電壓Ud與正向電流Id為變量的LED發(fā)光系數(shù)ηopt（Ud，Id）數(shù)學(xué)模型，和光通量φ（Ud，Id）光電數(shù)學(xué)模型。通過對兩種不同LED芯片的光學(xué)實(shí)驗(yàn)，驗(yàn)證了所提光電模型的正確性。
關(guān)鍵詞：LED光電模型；正向電壓；正向電流
中圖分類號：TN312+.8 文獻(xiàn)標(biāo)識碼：A 文章編號：1007-3175(2019)12-0005-05
An LED Photoelectric Model for Power Driving Control
HE Yang, XU Yu-zhen
（College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, China）
Abstract: According to the equivalent model of LED circuit and the principle of interaction of light, electricity and heat, this paper studied on the mathematical model of LED forward voltage Ud (Tj, Id). By converting the temperature variables such as the junction temperature Tj into electrical quantity which were easy to control, the mathematical model of LED illuminance coefficient ηopt (Ud, Id) and the photoelectric model of luminous flux φ (Ud, Id) with forward voltage Ud and forward current Id as variables were obtained. The optical experiment of two different LED chips is used to verify the correctness of the proposed photoelectric model.
Key words: LED photoelectric model; forward voltage; forward current
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