《InCell触摸屏原理》PPT课件

《《InCell触摸屏原理》PPT课件》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(betweentopandbottomglasses)2.Capacitivetouchpane

2、l2.1capacitancechangedbydeformationoftopglass2.2capacitancechangedbyinducedcurrentfromfinger2.2.1surfacecapacitivetouchpanel2.2.2projectivecapacitivetouchpanel2.2.2.1detectselfcapacitance2.2.2.2detectmutualcapacitance3.Othertouchpanel(Infrared,SAW,Electromagnetic,Optical…)Resistivetouchpanel基本原理：触

3、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）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%)NotresistscratchLowestcostE

4、asydetectcircuitWorkswithanystylus1.2Incellresistivetouchpanel—samsung(1)Basicprinciple:Whenpressed,thesensorswitchison(conductivecolumnspacercontactsensorelectrode)Fromplanview,attouchpoint,commonelectrodecontacttwosensinglinesperpendicularwitheachotherrespectively2.Capacitivetouchpanel2.1capacit

5、ancechangedbydeformationoftopglass2.2capacitancechangedbyinducedcurrentfromfinger2.2.1surfacecapacitivetouchpanel2.2.2projectivecapacitivetouchpanel2.2.2.1detectselfcapacitance2.2.2.2detectmutualcapacitance2.1Capacitivetouchpanel(压力式)Thisintegratetypehassomedifferentstructures,includes:Cellgapchan

6、getypeSamsungfiledapatent(US20080048994).AUOhasmadeademo.LCalignmentchangetypeSamsungfiledpatent(US20050094038)veryearly,butSamsung’sdemoappliedanotherdetectcircuit(SID0724.3),andEpsonmadeademo(SID0855.2)basedonSamsung’sstructurebyusingLTPS,IPSandactivematrixsensorsothatimprovedtheperformance.Cell

7、gapchangetype(1)Samsung’spatent(US20080048994)onlyposedabasicprinciple,itslayerstructureanddetaileddetectmethodisnotshowninthepatent.ThoughAUOhasmadeademo,thereareveryfewopenmaterialsofitsdetectprinciple.Theyuset