本文選題：LED　切入點：前照燈　出處：《天津大學》2014年博士論文　論文類型：學位論文

【摘要】：LED由于節(jié)能、壽命長、響應(yīng)速度快等優(yōu)點，成為新一代汽車照明的理想光源。近幾年由于LED技術(shù)上的巨大進步，高亮度LED已經(jīng)可以具備了作為前照燈主光源包括近光燈、遠光燈光源的條件。然而LED光源與傳統(tǒng)汽車照明中的光源相比，在光、電、熱、以及機械方面都具有完全不同的特性。這些特性決定了必須采用全新的方法進行前照燈的設(shè)計。 本文研究了高效率LED前照燈光學設(shè)計方法，采用高效率的光學設(shè)計實現(xiàn)了LED前照燈，同傳統(tǒng)汽車前照燈相比消耗更低的功率。在研究LED前照燈驅(qū)動電路基礎(chǔ)上還對基于前照燈的可見光通信進行了初步探索，采用基于熱管的散熱技術(shù)，有效地解決了LED前照燈的散熱問題。采用器件模擬工具SilvacoTCAD進行了LED光、電、熱性能分析，模擬了光子晶體表面結(jié)構(gòu)對LED出光的影響，以提高LED光源效率。論文的主要創(chuàng)新點如下： （1）以LED為光源實現(xiàn)了符合LED汽車前照燈國家標準的全LED前照燈。采用多橢球反射面和非球面透鏡進行了近光燈的光學設(shè)計，在光學理論分析研究的基礎(chǔ)上，采用ASAP光學設(shè)計軟件進行仿真，建立了前照燈光學系統(tǒng)模型。 （2）基于半導體理論，建立了功率型白光LED的光-電-熱學模型，進行了仿真。采用FDTD算法，分析了采用光子晶體結(jié)構(gòu)對提高LED光引出效率的影響�；跓釋W理論，建立了基于熱管散熱技術(shù)的LED前照燈系統(tǒng)模型。 （3）在研究汽車用LED驅(qū)動電源的基礎(chǔ)上，利用LED響應(yīng)速度快的特點，初步研究了基于LED前照燈的智能控制與可見光通信，為新一代智能汽車智能照明進行了探索。 所設(shè)計的近光燈采用三顆多芯片封裝功率型LED，實現(xiàn)投射式配光，消耗功率45W，，光通量1620流明。遠光燈采用2顆LED，消耗功率30瓦，光通量1080流明，而鹵素燈近光需要55瓦，遠光60瓦。光學測試結(jié)果符合課題組起草的LED前照燈國家標準。測試結(jié)果表明在環(huán)境溫度為30度條件下，100mA電流條件下，結(jié)溫為48攝氏度，在700mA額定電流下，結(jié)溫測得為120攝氏度。
[Abstract]:Due to the advantages of energy saving, long life and fast response, LED has become the ideal light source for the new generation of automobile lighting. Due to the great progress of LED technology in recent years, the high brightness LED can be used as the main light source of headlamp, including near-light lamp. However, the LED light source has completely different characteristics in terms of light, electricity, heat, and machinery compared with the traditional automotive lighting source. These characteristics make it necessary to adopt a new method to design the headlight. In this paper, the optical design method of high efficiency LED headlamp is studied, and the LED headlamp is realized by high efficiency optical design. Compared with the traditional automobile headlamp, the power consumption is lower. On the basis of studying the driving circuit of the LED headlamp, the visible light communication based on the headlamp is preliminarily explored, and the heat dissipation technology based on the heat pipe is adopted. The heat dissipation problem of LED headlamp is effectively solved. The optical, electrical and thermal properties of LED are analyzed by means of SilvacoTCAD, and the influence of photonic crystal surface structure on the output of LED is simulated. In order to improve the efficiency of LED light source. The main innovation of this paper is as follows:. Using LED as the light source, the full LED headlamp is realized according with the national standard of LED vehicle headlamp. The optical design of near-light lamp is carried out by using multi-ellipsoidal reflector and aspherical lens. Based on the analysis of optical theory, The optical system model of headlamp is established by using ASAP optical design software. Based on semiconductor theory, a photoelectric-thermal model of power white light LED is established and simulated. The effect of photonic crystal structure on improving the efficiency of optical extraction of LED is analyzed by using FDTD algorithm. The model of LED headlamp system based on heat pipe heat dissipation technology is established. Based on the research of LED driving power supply for automobile, the intelligent control and visible light communication based on LED headlight are preliminarily studied by using the characteristics of fast response speed of LED, and the exploration is made for the new generation intelligent lighting of intelligent vehicle. The designed near-light lamp uses three multi-chip encapsulated power type LEDs to achieve projective light distribution. The power consumption is 45W and the luminous flux is 1620 lumens. The far-light lamp uses 2 LEDs, consumes 30 watts of power, and has a luminous flux of 1080 lumens, while the halogen lamp needs 55 watts of near-light. The optical test results are in accordance with the national standards for LED headlamps drafted by the research group. The results show that the junction temperature is 48 degrees Celsius under the ambient temperature of 30 degrees and the junction temperature is 48 degrees Celsius at the rated current of 700mA. The junction temperature was measured at 120 degrees Celsius.
【學位授予單位】：天津大學
【學位級別】：博士
【學位授予年份】：2014
【分類號】：U463.651;TM923.34

【參考文獻】

相關(guān)期刊論文 前9條

1 趙光華;陳海燕;;一種非接觸大功率白光LED結(jié)溫測量方法[J];電路與系統(tǒng)學報;2010年01期

2 顏峻,于映;基于蒙特卡羅模擬方法的光源用LED封裝光學結(jié)構(gòu)設(shè)計[J];發(fā)光學報;2004年01期

3 申屠偉進,胡飛,韓彥軍,薛松,羅毅,錢可元;GaN基發(fā)光二極管芯片光提取效率的研究[J];光電子·激光;2005年04期

4 燕坤善;牛萍娟;付賢松;;一種LED汽車頭燈驅(qū)動電路[J];天津工業(yè)大學學報;2008年06期

5 羅毅,郭文平,邵嘉平,胡卉,韓彥軍,薛松,汪萊,孫長征,郝智彪;GaN基藍光發(fā)光二極管的波長穩(wěn)定性研究[J];物理學報;2004年08期

6 王橋立;夏志清;文靜;;LED結(jié)溫、熱阻構(gòu)成及其影響[J];現(xiàn)代顯示;2008年06期

7 張亮;寇曉艷;;FDTD算法的Matlab語言實現(xiàn)[J];延安大學學報(自然科學版);2009年02期

8 鄭代順;錢可元;;功率型白光LED研究進展[J];中國照明電器;2006年03期

9 陳海燕;趙光華;趙福利;;大功率白光LED的結(jié)溫與發(fā)光光譜特性研究[J];中山大學學報(自然科學版);2009年03期

相關(guān)博士學位論文 前3條

1 屠其非;白光LED應(yīng)用于汽車前照燈照明中的研究[D];復旦大學;2007年

2 于新剛;GaN基功率型LED器件及汽車前照燈散熱研究[D];清華大學;2008年

3 劉宗源;大功率LED封裝設(shè)計與制造的關(guān)鍵問題研究[D];華中科技大學;2010年

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