電容觸摸(mo)(mo)屏(ping)的(de)漂移問(wen)(wen)題(ti)(ti)。在觸摸(mo)(mo)屏(ping)產品(pin)中，電容觸摸(mo)(mo)屏(ping)是(shi)我們常用的(de)觸摸(mo)(mo)屏(ping)方式，那么(me)，對(dui)于電容觸摸(mo)(mo)屏(ping)來說，其(qi)產品(pin)本身(shen)應用比較廣(guang)泛，但是(shi)也存在著(zhu)不少問(wen)(wen)題(ti)(ti)。而且(qie)由于現在科技(ji)的(de)發(fa)展程(cheng)度還無法完全解(jie)決(jue)觸摸(mo)(mo)屏(ping)產品(pin)在相關原(yuan)理上出(chu)現的(de)問(wen)(wen)題(ti)(ti)，所(suo)以對(dui)于這些問(wen)(wen)題(ti)(ti)，目前還是(shi)普遍存在的(de)。
在(zai)這里武漢(han)公(gong)(gong)司要跟大家討(tao)論的是(shi)(shi)關于(yu)電(dian)(dian)容觸(chu)(chu)摸(mo)(mo)(mo)屏(ping)的"漂移"問(wen)題(ti)(ti)，這個問(wen)題(ti)(ti)比較常見，也是(shi)(shi)我們在(zai)解決產品(pin)問(wen)題(ti)(ti)時(shi)主要考慮的方(fang)面。 電(dian)(dian)容觸(chu)(chu)摸(mo)(mo)(mo)屏(ping)的漂移問(wen)題(ti)(ti)介紹！ 武漢(han)觸(chu)(chu)摸(mo)(mo)(mo)屏(ping)公(gong)(gong)司提示(shi)，電(dian)(dian)容觸(chu)(chu)摸(mo)(mo)(mo)屏(ping)本身實際(ji)是(shi)(shi)一(yi)套精密的漏(lou)電(dian)(dian)傳感器，帶手套的手不(bu)能觸(chu)(chu)摸(mo)(mo)(mo)，由于(yu)使用電(dian)(dian)容方(fang)式，導致有(you)漂移現象。電(dian)(dian)容觸(chu)(chu)摸(mo)(mo)(mo)屏(ping)和電(dian)(dian)阻觸(chu)(chu)摸(mo)(mo)(mo)屏(ping)都是(shi)(shi)電(dian)(dian)原理工(gong)作方(fang)式，電(dian)(dian)工(gong)作方(fang)式對于(yu)多(duo)點(dian)(dian)觸(chu)(chu)摸(mo)(mo)(mo)，不(bu)管(guan)是(shi)(shi)多(duo)少點(dian)(dian)，也不(bu)管(guan)是(shi)(shi)連續的還是(shi)(shi)不(bu)連續的都是(shi)(shi)取多(duo)點(dian)(dian)觸(chu)(chu)摸(mo)(mo)(mo)的中心點(dian)(dian)判斷，因為電(dian)(dian)流(liu)疊加是(shi)(shi)分不(bu)出來誰(shui)是(shi)(shi)誰(shui)的，沒有(you)辦法。
但是(shi)，目(mu)前(qian)來說，電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)觸(chu)(chu)(chu)摸(mo)屏(ping)(ping)仍然有(you)不(bu)(bu)(bu)少(shao)問(wen)(wen)題存在(zai)。武漢公司信(xin)為，觸(chu)(chu)(chu)摸(mo)屏(ping)(ping)目(mu)前(qian)的(de)(de)透明導電(dian)(dian)(dian)(dian)(dian)材(cai)料(liao)ITO--氧化金屬(shu)非(fei)常脆弱(ruo)，觸(chu)(chu)(chu)摸(mo)幾下就會損壞(huai)，還(huan)不(bu)(bu)(bu)能(neng)直(zhi)接(jie)用(yong)來作(zuo)(zuo)工作(zuo)(zuo)層(ceng)。材(cai)料(liao)的(de)(de)問(wen)(wen)題一(yi)時還(huan)難(nan)以解(jie)決，只(zhi)好委曲求全(quan)：在(zai)外部增加一(yi)層(ceng)非(fei)常薄的(de)(de)堅硬玻璃，它顯然是(shi)不(bu)(bu)(bu)能(neng)導電(dian)(dian)(dian)(dian)(dian)的(de)(de)，直(zhi)流是(shi)不(bu)(bu)(bu)行(xing)了(le)，改用(yong)高頻交流信(xin)號(hao)，靠人(ren)的(de)(de)手(shou)指頭（隔(ge)著薄玻璃）與工作(zuo)(zuo)面形成(cheng)的(de)(de)耦合(he)電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)來吸走一(yi)個交流電(dian)(dian)(dian)(dian)(dian)流，這(zhe)(zhe)就是(shi)電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)屏(ping)(ping)"電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)"名(ming)字(zi)的(de)(de)由(you)來。 電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)觸(chu)(chu)(chu)摸(mo)屏(ping)(ping)之所以出現"漂(piao)移(yi)"的(de)(de)問(wen)(wen)題，是(shi)因為耦合(he)電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)的(de)(de)方(fang)式是(shi)不(bu)(bu)(bu)穩定(ding)的(de)(de)，它直(zhi)接(jie)受溫度、濕(shi)度、手(shou)指濕(shi)潤(run)程度、人(ren)體體重(zhong)、地面干燥程度影(ying)響(xiang)，受外界(jie)大(da)(da)面積(ji)物(wu)體的(de)(de)干擾也非(fei)常大(da)(da)，帶來了(le)不(bu)(bu)(bu)穩定(ding)的(de)(de)結果(guo)，這(zhe)(zhe)些都直(zhi)接(jie)違背了(le)作(zuo)(zuo)為觸(chu)(chu)(chu)摸(mo)屏(ping)(ping)這(zhe)(zhe)種(zhong)坐標(biao)(biao)系統的(de)(de)基本(ben)要求，不(bu)(bu)(bu)可(ke)避免的(de)(de)要產生漂(piao)移(yi)，有(you)的(de)(de)電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)觸(chu)(chu)(chu)摸(mo)屏(ping)(ping)欲求通過25點(dian)(dian)校準(zhun)法(fa)(fa)甚至96點(dian)(dian)校準(zhun)法(fa)(fa)來解(jie)決漂(piao)移(yi)問(wen)(wen)題，其(qi)(qi)實是(shi)不(bu)(bu)(bu)可(ke)能(neng)的(de)(de)，漂(piao)移(yi)是(shi)電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)工作(zuo)(zuo)的(de)(de)這(zhe)(zhe)種(zhong)方(fang)式決定(ding)的(de)(de)，即使是(shi)在(zai)控(kong)制器(qi)的(de)(de)單片程序上利用(yong)動態計算和經驗值查(cha)表(biao)，也只(zhi)能(neng)是(shi)治(zhi)標(biao)(biao)不(bu)(bu)(bu)治(zhi)本(ben)。 其(qi)(qi)實，多點(dian)(dian)校準(zhun)法(fa)(fa)最(zui)早(zao)是(shi)大(da)(da)屏(ping)(ping)幕(mu)投影(ying)觸(chu)(chu)(chu)摸(mo)板使用(yong)的(de)(de)方(fang)法(fa)(fa)，目(mu)的(de)(de)是(shi)消除坐標(biao)(biao)對應的(de)(de)線(xian)xing失真，電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)觸(chu)(chu)(chu)摸(mo)屏(ping)(ping)的(de)(de)線(xian)xing失真也非(fei)常厲害，主(zhu)要是(shi)因為電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)屏(ping)(ping)的(de)(de)計算建(jian)立在(zai)四個電(dian)(dian)(dian)(dian)(dian)流量與觸(chu)(chu)(chu)摸(mo)點(dian)(dian)到四個電(dian)(dian)(dian)(dian)(dian)極的(de)(de)距離成(cheng)比例的(de)(de)理想(xiang)狀態上，實際由(you)于受環境(jing)電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)、線(xian)路(lu)寄生電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)和不(bu)(bu)(bu)同人(ren)使用(yong)的(de)(de)影(ying)響(xiang)。
