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摘要摘要摘要摘要对LED显示屏的均匀性进行评估和校正的过程中,需要采集LED显示屏上每一颗灯的亮度信息。但亮度信息采集工作并不在LED的光轴方向上进行,由此会引入因为方向角的差异带来的亮度信息采集的误差。因此,需要建立LED显示屏光学模型来对LED显示屏的照度信息等进行采集和研究。本文在辐射度学和光度学的理论基础上,分析了LED的结构、发光原理和光学特性,推导出了LED的光强分布函数;并结合LED显示屏的显示原理,针对LED显示屏发光的特点,得出了LED显示屏上每一颗等的照度分布规律。基于此分布规律,利用计算机高级语言编程实现了LED显示屏光学模型。实验证明,利用该光学模型可以采集和研究LED显示屏在某一点处的照度分布信息,进而评估其均匀性。关键词:发光二极管关键词:发光二极管关键词:发光二极管关键词:发光二极管LEDLEDLEDLED显示屏显示屏显示屏显示屏光学模型光学模型光学模型光学模型照度照度照度照度ABSTRACTABSTRACTABSTRACTABSTRACTWiththeceaselessdevelopmentofLEDdisplaytechnology,theLEDdisplayhasbeenbecomingmoreandmoreimportantindisplayfield.Inordertoachievebetterdisplayimpression,LEDdisplayneedsevaluationandcorrection,inwhichtheimageinformationofLEDdisplayneedstobecollected.HoweverthecollectionofimageinformationisnotdoneintheopticaxisdirectionofLED.Thus,itisneededtoestablishanopticalmodelofLEDdisplaytocollectandresearchtheilluminationinformationofLEDdisplayandsoon.Thetextanalyzesthestructure,luminescentprincipleandopticalcharacteristicsofLED,deducestheLEDluminousintensitydistributionfunction,basedonthetheoriesofradiationandphotometry;combinesthedisplayprincipleofLEDdisplay,establishesanopticalmodelofLEDdisplaybasedonidealconditions,consideringitsluminouscharacteristics,andgainstheilluminationdistributionlawofLEDdisplaysomewhereintheend.Byutilizingtheopticalmodel,theilluminationdistributioninformationofLEDdisplaysomewherecanbecollectedandresearched,thenitsdisplayqualitycanbeevaluated.KeywordsKeywordsKeywordsKeywords::::lightlightlightlightemittingemittingemittingemittingdiodediodediodediodeLEDLEDLEDLEDdisplaydisplaydisplaydisplayopticalopticalopticalopticalmodelmodelmodelmodelilluminationilluminationilluminationillumination目目目目录录录录第一章绪论...................................................................................................................11.1研究背景与目的..................................................................................................11.1.1LED显示屏的发展历程与趋势...................................................................11.1.2LED显示屏的应用背景...............................................................................21.1.3研究目的......................................................................................................31.2国内相关技术现状..............................................................................................31.3研究内容与章节安排..........................................................................................41.3.1研究内容......................................................................................................41.3.2章节安排......................................................................................................4第二章光学基础与LED显示屏...................................................................................72.1基本概念..............................................................................................................72.1.1辐射度学与光度学......................................................................................72.1.2辐射通量......................................................................................................72.1.3视在函数与光通量......................................................................................72.1.4光源发光强度及光通量的计算..................................................................92.1.5光亮度与光照度........................................................................................102.1.6立体角........................................................................................................112.2光传输过程中的基本规律................................................................................112.2.1距离平方反比定律....................................................................................112.2.2朗伯余弦定理............................................................................................122.2.3立体角投影定理........................................................................................132.2.4光亮度的传递............................................................................................142.3LED与LED显示屏.............................................................................................152.3.1LED的发光原理与结构.............................................................................152.3.2单个LED的光学模型[14]............................................................................162.3.3LED的光学特性.........................................................................................182.3.4LED的不一致性及其校正原理.................................................................202.3.5LED显示屏的显示模式.............................................................................212.3.6视角对LED显示屏均匀性的影响............................................................222.4本章小结..............................................................................................................25第三章LED显示屏光学性能测试模型........................................................................273.1模型的建立..........................................................................................................273.1.1建立LED显示屏照度检测模型.............................
本文标题:LED显示屏检测技术研究与实现_蒲华
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