《液晶屏知识简介》PPT课件

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1、液晶屏知识简介TheBriefIntroductionForLCDPanel培训目的Targets1、熟悉液晶显示屏的基本结构ToknowthebasicconfigurationofLCDpanel2、掌握液晶显示屏各接口的意义Tohandlethemeaningsofeachport3、掌握液晶显示屏工作条件TohandletheworkingconditionsofLCDpanel4、熟悉液晶屏的常见故障ToknowthegeneralfaultonLCDpanel目录Contents1、液晶屏的基本组成Theb

2、asicconfigurationofLCDpanel2、液晶屏接口的意义ThemeaningsofLCDpanel’sports3、液晶屏的工作条件TheworkingconditionsofLCDpanel4、液晶屏的常见故障ThegeneralfaultonLCDpanel一、液晶屏的基本组成Basicconfiguration所有的液晶屏（TFT-LCD）都包括：AllTFT-LCDpanelincludes:显示屏单元PanelunitTFT驱动板TFTdrivingboard背光板Backlightboar

3、d冷镜色轮光源屏幕投影镜头处理器存储器光学1、显示屏单元Panelunit液晶基片：主要由液晶、TFT、TFT电极、彩色滤光片、玻璃基板和偏光片等组成。LiquidCrystalModule:ConsistofLiquidcrystal,ThinFilmTransistor,TFTelectrodesheets,Colorfiltersheet,GlasssheetsandPolarizingfilter.光源模组：主要由灯管、反射板、导光板、散射板、棱镜片和保护膜等组成。Lightsourcemodule:consi

4、stofCCFL,Reflectionsheet,LightGuidePlate(LGP),Diffusersheet,PrismsheetsandProtectionsheet.2、TFT驱动板TFTDrivingboard主要包括：输入信号连接器、时序控制器、帧缓冲器、DC-DC转换及基准电压、扫描驱动IC和数据驱动IC等。Including:Inputconnector,Timingcontroller,Framebuffer,DC-DCconverter&referencevoltage,ScandriverI

5、CandDatadriverIC.3、背光板Backlightboard主要包括：输入连接器、背光控制IC、N沟道双MOSFET、变压器、输出连接器和检测保护电路等。Including:Inputconnector,Invertercontroller,N-channeldualMOSFET,Transformer,Outputconnector,Overcurrent&voltagedetectionandprotection.4、液晶屏的拆解Disassemblethepanelunit（以奇美27寸屏为例take

6、examplefor27-incheCHIMEIpanel）拆去背光板屏蔽罩后轻轻拔掉7个灯管插头和一个公共插头，拿开背光板。Disassemblethebacklightshieldandputofftheplugs,thenremovethebacklightboard.拆去TFT驱动板屏蔽罩DisassembletheTFTdrivingboardshield.拆去TFT驱动板排线DisassembletheTFTdrivingboardcables.拿开TFT驱动板TakeawaytheTFTdrivingbo

7、ard.将液晶屏翻转过来，拆去屏框上的10颗螺钉Overturnthepanelunit,disassemblethe10screwsontheframe.将屏框拆掉后Afterdisassembledtheframe.拆去接口板上的螺钉Removethescrewsonthecircuitboard.将液晶板翻起，并拿开Putupthepanelunitandremoveit.背光源组件Backlightsourcemodule.将背光源组件翻转过来，撕开黑胶纸。Overturnthebacklightmodule,

8、riveofftheblacktape.用一字起轻轻撬开卡扣Lightlyprizeupthefastenerswithascrewdriver.翻起反射板，可以看到灯管CCFLPutupthereflectionsheet,theCCFLsappear.完整的灯管排列AlltheCCFLs.CCFL简介CCFL是ColdCath