【正文】 .......................................................................................................... 18 4． 1． 1 循環(huán)燈電路的設(shè)計 ................................................................................... 18 4． 1． 2循環(huán)燈的制作及測試 ................................................................................. 19 4． 2 聲控旋律燈的設(shè)計 ............................................................................................... 19 4． 2． 1 LED旋律燈簡介 ........................................................................................ 19 4． 2． 2基于 LM358的聲控旋律燈的設(shè)計 ............................................................... 19 4． 2． 3驅(qū)動電路的測試 ........................................................................................ 20 5 結(jié)論 ................................................................................................................................. 21 參考文獻 ...............................................................................................................................1 致謝 ......................................................................................................................................1 巢湖學(xué)院 2020 屆本科畢業(yè)論文（設(shè)計） 1 1 引言 LED(發(fā)光二極管 )，它是一種能把電能直接轉(zhuǎn)換成光能的特殊半導(dǎo)體器件。 本文從 LED 的發(fā)展 及 其 應(yīng)用領(lǐng)域 出發(fā)，介紹了 LED 的特點和特性參數(shù) 。 保密的畢業(yè) 論文 (設(shè)計 )在解密后遵守此規(guī)定。對本文巢湖學(xué)院 2020 屆本科畢業(yè)論文（設(shè)計） 1 的研究做出重要貢獻的個人和集體，均已在文中以明確方式標明。除文中已經(jīng)注明引用的內(nèi)容外，本論文不含任何其他個人或集體已經(jīng)發(fā)表或撰寫過的作品成果。學(xué)校 根據(jù)需要， 有權(quán)保留并向國家有關(guān)部門或機構(gòu)送交論文的復(fù)印件和電子版，允許畢業(yè) 論文 (設(shè)計 )被查閱和借閱；學(xué)校可以將畢業(yè) 論文 (設(shè)計 )的全部或部分內(nèi)容編入有關(guān)數(shù)據(jù)庫進行檢索，可以采用影印、縮印或掃描等復(fù)制手段保存、匯編畢業(yè)，并且本人電子文檔和紙質(zhì)論文的內(nèi)容相一致。 LED 不能像普通白熾燈一樣直接用電壓源供電，否則電壓波動稍增，電流就會增大到將 LED 燒毀的程度 。 關(guān)鍵詞 ： 發(fā)光二極管 ；驅(qū)動電路； 燈The Study of the LED’S Driver Circuit Abstract Because LED has the advantages of small volume, low cost, long service life etc. So it has been widely applied to each field of the society. The application of LED cannot do without the drive control circuit what it needs, through the drive circuit to obtain good and steady current, to meet the application requirements of various occasions. LED does not like ordinary incandescent lamp directly with voltage source, otherwise the voltage fluctuation increases slightly, the electric current will increase to the intensity of burning LED. In this paper, from the development of LED and its application in the field of view, characteristics and parameters of LED are introduced. The LED typical drive circuit, integrated drive circuit were studied. Starting from the LED driving circuit, design a LED lamp, and based on the chip LM358 designed a voice melody lamp drive circuit, are analyzed and studied in theory and experiment, elaborated its principle, feasibility and necessity from the experimental point of view. Keywords： light emitting diodes, drive circuit, lamp目錄 摘要 ...................................................................................................................................... I Abstract .................................................................................................................................1 1 引言 ...................................................................................................................................1 1． 1 研究的意義及主要研究內(nèi)容 ....................................................................................1 LED的發(fā)展現(xiàn)狀 ........................................................................................................2 1． 2． 1 LED的發(fā)展 .................................................................................................2 1． 2． 2 LED的應(yīng)用領(lǐng)域 ..........................................................................................3 2 LED原理 ............................................................................................................................5 2． 1 LED發(fā)光原理與結(jié)構(gòu) ...............................................................................................5 2． 2 LED的主要參數(shù)與特性 ...........................................................................................7 2． 2． 1 單向?qū)щ娦? ................................................................................................7 2． 2． 2 VI特性 ....................................................................................................7 2． 2． 3 PN結(jié)的反向擊穿 ........................................................................................8 2． 2． 4 極間電容 ...................................................................................................9 2． 3 LED的優(yōu)缺點 ....................................................................................................... 10 2． 3． 1 LED的優(yōu)點 ............................................................................................... 10 2． 3． 2 LED存在的問題 ........................................................................................ 11 3 LED驅(qū)動電路的研究 ......................................................................................................... 12 3． 1 LED驅(qū)動技術(shù) ....................................................................................................... 12 3． 1． 1電路組成 ..................................................................