Transcription of AnExplanationofLCDViewingAngle - HANTRONIX
1 ApplicationNoteCrystalClearandVisiblySup eriorLCDM odulesAnExplanationofLCDV iewingAngleGeneralDefinitionofbiasanglea ndviewingangleFigure# , , "biasangle"isoftenusederroneouslywiththe term"viewingangle".Thebiasangleistheangl efromtheperpendicularfromwhichthedisplay isbestviewed.(Seefigure#1)Thisangleisdet erminedwhenthedisplayisdesigned, ,itisreferredtoasa"12:00"or"top" :00or6:00viewingposition, , 20degrees, ,assumethedisplayisa12:00(topviewing) ,itwillhaveitsmaximumcontrastandbest look .Iftheviewermoveshiseyefurtherabovethedi splaybyanadditional30degrees,hewillseeth edisplayreduceincontrast(butstillbeeasil yreadable). 30 25 BIAS60 VIEWINGANGLE60 VIEWINGANGLE12:00(TOP)6:00(BOTTOM)DEFINI TIONOFVIEWINGANGLE(SIDEVIEWS)Copyright20 00, HANTRONIX , #2 Choosingtherightmoduleforyourapplication ConclusionAdjustingthecontrastvoltage,V, willeffectthebiasangletosomeextent, :00displaycanbeoptimizedfora6 :00displaysetfor6:00viewingpositionwilln othaveasgreatacontrastasa6:00displaysetf or6:00viewingposition, :00ora6:00modulecanbeused; ,theviewinganglesofboththe6:00and12:00mo dulesactuallyoverlaptheperpendicular(ors traighton) , , (Seefigure#2)TheLCDispositionedatthenomi nalviewingposition, , ,suchasacalculator, , ,a12 , +5v+5v-5v10K10 KVDDVDDVLVLVSSVSSSINGLEVOLTAGEDUALVOLTAG ELCDMODULELCDMODULEC opyright2000, HANTRONIX .
