電(dian)容(rong)(rong)觸(chu)摸屏的(de)(de)(de)漂移問題(ti)。在(zai)觸(chu)摸屏產品中，電(dian)容(rong)(rong)觸(chu)摸屏是(shi)我(wo)們常用的(de)(de)(de)觸(chu)摸屏方式，那么，對于電(dian)容(rong)(rong)觸(chu)摸屏來說，其產品本(ben)身應用比較(jiao)廣泛，但(dan)是(shi)也存在(zai)著不(bu)少問題(ti)。而且由于現(xian)在(zai)科(ke)技的(de)(de)(de)發展程度還無法完全解決觸(chu)摸屏產品在(zai)相關(guan)原(yuan)理(li)上(shang)出現(xian)的(de)(de)(de)問題(ti)，所以對于這些問題(ti)，目前還是(shi)普遍存在(zai)的(de)(de)(de)。
在這里武漢公(gong)司要跟大家討論的(de)(de)是(shi)(shi)關于電(dian)容(rong)觸(chu)摸(mo)屏(ping)(ping)的(de)(de)"漂移(yi)(yi)"問題(ti)(ti)，這個問題(ti)(ti)比較(jiao)常見，也是(shi)(shi)我(wo)們在解決產(chan)品問題(ti)(ti)時(shi)主(zhu)要考慮的(de)(de)方面。 電(dian)容(rong)觸(chu)摸(mo)屏(ping)(ping)的(de)(de)漂移(yi)(yi)問題(ti)(ti)介(jie)紹(shao)！ 武漢觸(chu)摸(mo)屏(ping)(ping)公(gong)司提示，電(dian)容(rong)觸(chu)摸(mo)屏(ping)(ping)本身(shen)實際是(shi)(shi)一套(tao)精(jing)密的(de)(de)漏電(dian)傳感器，帶手套(tao)的(de)(de)手不(bu)能觸(chu)摸(mo)，由(you)于使用(yong)電(dian)容(rong)方式，導致有漂移(yi)(yi)現象。電(dian)容(rong)觸(chu)摸(mo)屏(ping)(ping)和電(dian)阻(zu)觸(chu)摸(mo)屏(ping)(ping)都(dou)是(shi)(shi)電(dian)原理工作(zuo)方式，電(dian)工作(zuo)方式對于多(duo)點(dian)觸(chu)摸(mo)，不(bu)管是(shi)(shi)多(duo)少點(dian)，也不(bu)管是(shi)(shi)連(lian)續(xu)(xu)的(de)(de)還是(shi)(shi)不(bu)連(lian)續(xu)(xu)的(de)(de)都(dou)是(shi)(shi)取多(duo)點(dian)觸(chu)摸(mo)的(de)(de)中(zhong)心(xin)點(dian)判斷，因為電(dian)流疊加是(shi)(shi)分不(bu)出來誰是(shi)(shi)誰的(de)(de)，沒有辦法。
但是(shi)(shi)(shi)(shi)(shi)，目前(qian)來(lai)說，電(dian)(dian)(dian)(dian)容(rong)(rong)觸(chu)(chu)(chu)(chu)摸(mo)(mo)(mo)屏(ping)(ping)仍(reng)然有(you)不(bu)(bu)少問題(ti)存在(zai)。武漢公司信為，觸(chu)(chu)(chu)(chu)摸(mo)(mo)(mo)屏(ping)(ping)目前(qian)的(de)(de)(de)(de)(de)透明導電(dian)(dian)(dian)(dian)材料ITO--氧(yang)化金屬非常脆弱，觸(chu)(chu)(chu)(chu)摸(mo)(mo)(mo)幾(ji)下就(jiu)會損(sun)壞，還(huan)不(bu)(bu)能直(zhi)接用(yong)(yong)來(lai)作(zuo)工作(zuo)層。材料的(de)(de)(de)(de)(de)問題(ti)一時(shi)還(huan)難以解決，只好(hao)委曲求(qiu)(qiu)全(quan)：在(zai)外部(bu)增加一層非常薄的(de)(de)(de)(de)(de)堅硬(ying)玻(bo)璃，它顯然是(shi)(shi)(shi)(shi)(shi)不(bu)(bu)能導電(dian)(dian)(dian)(dian)的(de)(de)(de)(de)(de)，直(zhi)流是(shi)(shi)(shi)(shi)(shi)不(bu)(bu)行了，改用(yong)(yong)高頻交流信號，靠人(ren)的(de)(de)(de)(de)(de)手指頭（隔(ge)著(zhu)薄玻(bo)璃）與工作(zuo)面(mian)形成的(de)(de)(de)(de)(de)耦合電(dian)(dian)(dian)(dian)容(rong)(rong)來(lai)吸走一個(ge)交流電(dian)(dian)(dian)(dian)流，這(zhe)就(jiu)是(shi)(shi)(shi)(shi)(shi)電(dian)(dian)(dian)(dian)容(rong)(rong)屏(ping)(ping)"電(dian)(dian)(dian)(dian)容(rong)(rong)"名字(zi)的(de)(de)(de)(de)(de)由來(lai)。 電(dian)(dian)(dian)(dian)容(rong)(rong)觸(chu)(chu)(chu)(chu)摸(mo)(mo)(mo)屏(ping)(ping)之所以出現"漂(piao)移(yi)"的(de)(de)(de)(de)(de)問題(ti)，是(shi)(shi)(shi)(shi)(shi)因為耦合電(dian)(dian)(dian)(dian)容(rong)(rong)的(de)(de)(de)(de)(de)方(fang)(fang)式是(shi)(shi)(shi)(shi)(shi)不(bu)(bu)穩(wen)定的(de)(de)(de)(de)(de)，它直(zhi)接受溫度(du)、濕度(du)、手指濕潤程(cheng)度(du)、人(ren)體(ti)(ti)(ti)體(ti)(ti)(ti)重(zhong)、地面(mian)干(gan)燥程(cheng)度(du)影(ying)響，受外界大(da)(da)面(mian)積物(wu)體(ti)(ti)(ti)的(de)(de)(de)(de)(de)干(gan)擾(rao)也(ye)(ye)非常大(da)(da)，帶來(lai)了不(bu)(bu)穩(wen)定的(de)(de)(de)(de)(de)結果，這(zhe)些都(dou)直(zhi)接違背(bei)了作(zuo)為觸(chu)(chu)(chu)(chu)摸(mo)(mo)(mo)屏(ping)(ping)這(zhe)種坐標(biao)(biao)系統(tong)的(de)(de)(de)(de)(de)基本要(yao)求(qiu)(qiu)，不(bu)(bu)可避免(mian)的(de)(de)(de)(de)(de)要(yao)產生(sheng)漂(piao)移(yi)，有(you)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)容(rong)(rong)觸(chu)(chu)(chu)(chu)摸(mo)(mo)(mo)屏(ping)(ping)欲求(qiu)(qiu)通(tong)過25點校準(zhun)法甚至(zhi)96點校準(zhun)法來(lai)解決漂(piao)移(yi)問題(ti)，其(qi)(qi)實是(shi)(shi)(shi)(shi)(shi)不(bu)(bu)可能的(de)(de)(de)(de)(de)，漂(piao)移(yi)是(shi)(shi)(shi)(shi)(shi)電(dian)(dian)(dian)(dian)容(rong)(rong)工作(zuo)的(de)(de)(de)(de)(de)這(zhe)種方(fang)(fang)式決定的(de)(de)(de)(de)(de)，即(ji)使是(shi)(shi)(shi)(shi)(shi)在(zai)控制器的(de)(de)(de)(de)(de)單片程(cheng)序上利用(yong)(yong)動態(tai)計算和經驗值查表(biao)，也(ye)(ye)只能是(shi)(shi)(shi)(shi)(shi)治(zhi)標(biao)(biao)不(bu)(bu)治(zhi)本。 其(qi)(qi)實，多點校準(zhun)法最早(zao)是(shi)(shi)(shi)(shi)(shi)大(da)(da)屏(ping)(ping)幕投影(ying)觸(chu)(chu)(chu)(chu)摸(mo)(mo)(mo)板使用(yong)(yong)的(de)(de)(de)(de)(de)方(fang)(fang)法，目的(de)(de)(de)(de)(de)是(shi)(shi)(shi)(shi)(shi)消除(chu)坐標(biao)(biao)對應的(de)(de)(de)(de)(de)線xing失真，電(dian)(dian)(dian)(dian)容(rong)(rong)觸(chu)(chu)(chu)(chu)摸(mo)(mo)(mo)屏(ping)(ping)的(de)(de)(de)(de)(de)線xing失真也(ye)(ye)非常厲害，主要(yao)是(shi)(shi)(shi)(shi)(shi)因為電(dian)(dian)(dian)(dian)容(rong)(rong)屏(ping)(ping)的(de)(de)(de)(de)(de)計算建立(li)在(zai)四個(ge)電(dian)(dian)(dian)(dian)流量與觸(chu)(chu)(chu)(chu)摸(mo)(mo)(mo)點到四個(ge)電(dian)(dian)(dian)(dian)極的(de)(de)(de)(de)(de)距離成比例的(de)(de)(de)(de)(de)理(li)想狀態(tai)上，實際由于受環境電(dian)(dian)(dian)(dian)容(rong)(rong)、線路寄生(sheng)電(dian)(dian)(dian)(dian)容(rong)(rong)和不(bu)(bu)同(tong)人(ren)使用(yong)(yong)的(de)(de)(de)(de)(de)影(ying)響。
