基础液晶显示器驱动原理.ppt

《基础液晶显示器驱动原理.ppt》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、基礎液晶顯示器驅動原理Topic液晶分類液晶光電特性STN液晶顯示原理APT矩陣驅動原理MLS矩陣驅動原理2021/8/111WritebyHersingYangTypesofLiquidCrystal2021/8/112WritebyHersingYangLiquidCrystalPhasesNematicPhasesSmecticPhasesIsotropicPhasesCrystallinePhasesTemperature2021/8/113WritebyHersingYangOpticalcharacteristicof

2、LiquidCrystalN1N2N1>N2N1=Nparallel=NextraordinaryN2=Nperpendicular=NordinaryOpticalAnisotropy:Birefringence△N=Nparallel-NperpendicularPositiveBirefringenceN1>N2PositiveLiquidCrystalεparallel>εperpendicular2021/8/114WritebyHersingYangOperationTheoryofTNTwist90液晶分子Field

3、OFFFieldON利用液晶的旋光特性調變穿透光線液晶的旋光特性消失2021/8/115WritebyHersingYangOperationTheoryofSTNTwist270液晶分子FieldOFFFieldON利用液晶的雙折射特性調變穿透光線2021/8/116WritebyHersingYangV-TCurveofTN/STN100%90%10%VnsSTNVsSTNVsTNVnsTNTV2021/8/117WritebyHersingYangTheStructureofSimple/ActiveMatrixDrive

4、SystemsSimpleActive2021/8/118WritebyHersingYangTheEvolutionofDrivingSystems直接驅動法(DirectAddressing)靜態驅動法(StaticAddressing)多工驅動法(MultiplexAddressing)主動驅動法(ActiveAddressing/Multi-LineSelection)主動矩陣驅動法(ActiveMatrixAddressing)兩端元件(MIM,Diode..)三端元件(A-Si:HTFT,Ploy-SiTFT..)Pl

5、asmaAddressing(PALC)熱掃描驅動法(雷射掃描)光掃描驅動法(電子速掃描)2021/8/119WritebyHersingYangLCDDirectDriveTechniques2021/8/1110WritebyHersingYang多工驅動法(振幅選擇驅動法,APT)1234N123Frame1Frame2F0DT水平掃描訊號+D-D0垂直影像訊號Row1Row2Row3RowNColumn1ONOFFONOFFF+DF-DF+DF-D+D-D0+D-D0+D-D0+D-D01234NFrame1液晶畫素電壓

6、T2021/8/1111WritebyHersingYang多工驅動法的限制1.01.11.21.31002002021/8/1112WritebyHersingYangIAPT驅動波形2021/8/1113WritebyHersingYang主動驅動法(ActiveAddressing)R1(t)R2(t)R3(t)Rn(t)C1(t)R1(t),R2(t),...Rn(t)是一組兩兩正交的向量函數2021/8/1114WritebyHersingYangMultipleLineSelectionSTNForthepurpose

7、ofdrivingthefastrespondingSTNLCDswithoutdecreasingcontrastMLSRequired3-LevelRowDriverand(L+1)levelsColumnDriver.L=RowSelectionsattime2021/8/1115WritebyHersingYang4-LineSelectionV4V3V2V5V1ColumnWaveform2021/8/1116WritebyHersingYangInverseRowFunction1Frame1Sub-FrameTime

8、Row1Row2Row3Row4Row5Row62021/8/1117WritebyHersingYang2-LevelsMLSwithDummyRowSUM2021/8/1118WritebyHersingYang2-LevelsMLSWavef