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后視鏡是駕駛員坐在駕駛室座位上直接獲取汽車后方、側方和下方等外部信息的工具。為了駕駛員操作方便，防止行車安全事故的發生，保障人身安全，各國均規定了汽車上必須安裝后視鏡，且所有后視鏡都必須能調整方向。
在夜間受到后車的前照燈照射時，后視鏡的反射光進入駕駛員的眼簾，易于造成炫目狀態，所以開發出防炫目內后視鏡。防炫目內后視鏡大致可以分為兩種：
（1）成本低且成為主流的截面為楔型的內后視鏡；
（2）從功能效用的觀點出發，僅在必要的景物時使用的采用了電控彩色發光元件或液晶元件的內后視鏡。
防眩目(mu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動后視(shi)鏡(jing)(jing)由(you)1個(ge)(ge)特(te)殊的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)化層(ceng)鏡(jing)(jing)面、2個(ge)(ge)光(guang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)傳感器以及電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子控(kong)制(zhi)器組成。電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子控(kong)制(zhi)器接收(shou)光(guang)敏二極管傳送的(de)燈(deng)光(guang)照射(she)強(qiang)(qiang)度信號，如果后車(che)燈(deng)光(guang)強(qiang)(qiang)于(yu)前車(che)燈(deng)光(guang)，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子控(kong)制(zhi)器將(jiang)輸出一個(ge)(ge)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓到鏡(jing)(jing)面，改變(bian)鏡(jing)(jing)面電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)化層(ceng)的(de)顏(yan)色。這(zhe)個(ge)(ge)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓越高(gao)，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)化層(ceng)顏(yan)色的(de)改變(bian)越大。電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)化層(ceng)的(de)顏(yan)色改變(bian)后，經過電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動后視(shi)鏡(jing)(jing)反射(she)到駕(jia)駛員眼(yan)睛的(de)光(guang)線就(jiu)顯(xian)著減弱，不但不影(ying)響駕(jia)駛員的(de)視(shi)力，反而提高(gao)了駕(jia)乘車(che)輛的(de)舒適性和安全(quan)性。
幫手汽(qi)(qi)配(pei)網(wang)(www.zhiyenongfu.com)是(shi)中(zhong)國領先(xian)的汽(qi)(qi)車(che)配(pei)件(jian)網(wang)站(zhan)，擁有全球領先(xian)的汽(qi)(qi)車(che)配(pei)件(jian)大(da)全數據，為廣大(da)車(che)主提供汽(qi)(qi)車(che)配(pei)件(jian)報價和(he)汽(qi)(qi)車(che)零部件(jian)訂購服(fu)務，是(shi)您(nin)咨詢汽(qi)(qi)車(che)配(pei)件(jian)價格和(he)疑難件(jian)的理想網(wang)站(zhan)
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