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ID:38565858
大小:463.00 KB
页数:28页
时间:2019-06-15
《InCell触摸屏原理1》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、In-Cell触摸屏原理2010.3.15Introductionoftouchpanel1.Resistivetouchpanel1.1traditionalresistivetouchpanel(directlyglueonLCDmodule)a.4/5/6/8-wireresistivetouchpanelb.digitalresistivetouchpanel(touchswitches,matrix)1.2integrateresistivetouchpanelintoLCDcell(betw
2、eentopandbottomglasses)2.Capacitivetouchpanel2.1capacitancechangedbydeformationoftopglass2.2capacitancechangedbyinducedcurrentfromfinger2.2.1surfacecapacitivetouchpanel2.2.2projectivecapacitivetouchpanel2.2.2.1detectselfcapacitance2.2.2.2detectmutualcapa
3、citance3.Othertouchpanel(Infrared,SAW,Electromagnetic,Optical…)Resistivetouchpanel基本原理:触摸时,两层ITO互相接触,从而在两层ITO之间形成电阻通路根据上下基板材料,可分为filmonglass,glassonglass,filmonfilm等结构。1.14-wireresistivetouchpanel在两电极上加5V直流电在ITO均匀电阻平面上形成均匀稳恒电流场在另一面的ITO电极上测量电压根据测得电压值(0-5V
4、)确定触摸点的位置用同样方法测量Y坐标1.14-wireresistivetouchpanelLowlifetime(around1milliontimes)Lowtransmissivity(75%-85%)NotresistscratchLowestcostEasydetectcircuitWorkswithanystylus1.2Incellresistivetouchpanel—samsung(1)Basicprinciple:Whenpressed,thesensorswitchison(co
5、nductivecolumnspacercontactsensorelectrode)Fromplanview,attouchpoint,commonelectrodecontacttwosensinglinesperpendicularwitheachotherrespectively2.Capacitivetouchpanel2.1capacitancechangedbydeformationoftopglass2.2capacitancechangedbyinducedcurrentfromfin
6、ger2.2.1surfacecapacitivetouchpanel2.2.2projectivecapacitivetouchpanel2.2.2.1detectselfcapacitance2.2.2.2detectmutualcapacitance2.1Capacitivetouchpanel(压力式)Thisintegratetypehassomedifferentstructures,includes:CellgapchangetypeSamsungfiledapatent(US200800
7、48994).AUOhasmadeademo.LCalignmentchangetypeSamsungfiledpatent(US20050094038)veryearly,butSamsung’sdemoappliedanotherdetectcircuit(SID0724.3),andEpsonmadeademo(SID0855.2)basedonSamsung’sstructurebyusingLTPS,IPSandactivematrixsensorsothatimprovedtheperfor
8、mance.Cellgapchangetype(1)Samsung’spatent(US20080048994)onlyposedabasicprinciple,itslayerstructureanddetaileddetectmethodisnotshowninthepatent.ThoughAUOhasmadeademo,thereareveryfewopenmaterialsofitsdetectprinciple.Theyuset
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