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电子系统设计线阵LED图文显示电子系统设计信科院线阵LED图文显示I线阵LED图文显示摘要LED旋转显示器时基于视觉暂留原理,开发的一种旋转式LED显示屏。本设计基于STC89C52单片机,通过直流电机带动旋转,在具有一定转速地载体上安装16个LED发光器件,各LED发光管等间距排位一条直线,随着旋转速度的加快,不断扫描出预设的文字,图案等。使用一个霍尔传感器作为定位传感器,当旋转一周时,霍尔传感器与电磁铁相遇,霍尔传感器输出低电平,当离开时,输出端再次输出高电平,从而给单片机一个下降沿的跳变型号,产生一个中断,从而更新显示。针对传统LED显示屏视角单一、体积较大、需要的发光二极管数目较多等特点,利用电机带动LED显示阵列高速旋转实现环形显示,达到360全视角,在相同显示信息量上降低产品体积,减少对发光二极管的使用,设计一个可以经常方便变换内容、能够携带方便、信息容量大、价格低廉、结构简单的信息播放系统,即旋转LED显示屏实际制作的LED旋转显示屏技术参数的测试结果,以及实际的运行效果表明,本文设计和制作的旋转显示屏符合设计要求,具有一定的创新性和实际应用价值。关键字:STC89C52视觉暂留旋转霍尔传感器直流电机LineararrayLEDgraphicdisplayAbstract:LEDrotatingdisplayisbasedontheprincipleofpersistenceofvision,thedevelopmentofarotatingLEDdisplay.ThedesignisbasedSTC89C52microcontroller,throughDCmotordrivenrotatingatacertainspeedtothecarrierinstalled16LEDdevices,LEDlighttubespacingeachqualifyingastraightline,withtherotationspeedincreasescontinuouslyscanthepresettext,graphicsandsoon.UsingaHallsensorasapositioningsensor,whentherevolution,theHallsensorandsolenoidencounter,Hallsensoroutputlow,whileleavingtheoutputterminaloutputhighagain,givingthemicrocontrollerafallingjumpchangemodels,aninterruptisgenerated,therebyupdatingthedisplay.PerspectiveoftraditionalLEDdisplaysingle,larger,andweneedalargernumberoflight-emittingdiodesandothercharacteristics,theuseofmotordrivenLEDdisplayarraytoachievehigh-speedrotatingringdisplay,wideviewingangleof360,thesameamountofinformationdisplayedonthelowerproductvolumeandreducetheuseoflight-emittingdiodes,todesignaconvenientconversioncanoftencontenttoportable,informationcapacity,lowcost,simplestructureoftheinformationbroadcastsystem,namelytheactualproductionofrotatingLEDdisplayLEDrotatingdisplaytechnologyparametersofthetestresults,aswellasactualoperatingresultsshowthattheproposeddesignandproductionofrotaryscreenwiththedesignrequirements,withacertaindegreeofinnovationandpracticalvalue.Keywords:STC89C52PersistenceofvisionRotateHallsensorDCmotorrotation0目录前言:..............................................................................................................................................1一、任务要求...........................................................................................................................1二、系统方案论证与比较.......................................................................................................11.系统供电选择...................................................................................................................12.电机选择...........................................................................................................................13.控制核心选择...................................................................................................................14.LED选择...........................................................................................................................35.定位元件旋转...................................................................................................................3三、系统总体设计...................................................................................................................31.系统总体硬件框图...........................................................................................................32.程序设计框图...................................................................................................................3四、系统整体测试、分析与计算...........................................................................................41.线状点阵LED驱动参数分析与计算...........................................................................42.线阵LED运动参数分析与计算...................................................................................43.指针式秒表分析与计算...............................................................................................5五、核心程序设计...................................................................................................................51.定时器秒定时设计...........................................................................................................52.时、分、秒针显示程序...................................................................................................53.汉字显示程序...................................................................................................................6六、结论与系统设计感想.......................................................................................................7七、附录...................................................................................................................................7八、参考文献...........................................................................................................................7电子系统设计信科院线阵LED图文显示1前言:本系统是利用人眼视觉暂留效应的线阵LED图文显示系统.该系统由电机带动一列16个LED高速旋转,以STC公司的MCUstc89c52处理器为核心,精确控制LED的亮灭时间,从而实现字符及简单动态画面的显示.。采用通用LED取模软件,将要显示的内容取模转换为数字信号,并将该信号传输给线阵LED。系统由STC89C52控制电路、线阵LED、标志杆等部分组成,能够开机自动检测,通过按键切换来控制显示不同的内容。实验表明该系统基本达到了设计的各项要求。一、任务要求1.在本系统自检阶段实现流水灯式的显示。2.在第二个测试阶段,是显示16个同心圆。3.显示图形“成都理工大学”并且要求显示不抖动、无漂移。4.初步定为显示数字时钟,拓展显示指针型时钟。并要求显示稳定。二、系统方案论证与比较1.系统供电选择方案一:本系统电机使用电源供电,旋转部分使用无线供电。电机由于功率较大所以使用电源供电,旋转部分无线供电模块以减少旋转部分的重量,但是此方
本文标题:线阵LED图文显示
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