電容觸摸(mo)屏(ping)(ping)的(de)(de)漂移問(wen)題。在觸摸(mo)屏(ping)(ping)產品(pin)(pin)中，電容觸摸(mo)屏(ping)(ping)是我們常用的(de)(de)觸摸(mo)屏(ping)(ping)方(fang)式，那么，對(dui)于電容觸摸(mo)屏(ping)(ping)來說，其(qi)產品(pin)(pin)本身應用比較廣泛，但是也存在著(zhu)不少問(wen)題。而且由于現在科技的(de)(de)發展程度還無法完全解決(jue)觸摸(mo)屏(ping)(ping)產品(pin)(pin)在相關原理上(shang)出(chu)現的(de)(de)問(wen)題，所以對(dui)于這些問(wen)題，目前還是普遍存在的(de)(de)。
在這里(li)武(wu)漢(han)公司(si)要跟大(da)家(jia)討論的是(shi)(shi)關于(yu)電(dian)(dian)(dian)容(rong)觸(chu)摸(mo)屏的"漂移(yi)"問題(ti)(ti)，這個問題(ti)(ti)比較常見，也是(shi)(shi)我們在解決產品問題(ti)(ti)時主要考(kao)慮的方面。 電(dian)(dian)(dian)容(rong)觸(chu)摸(mo)屏的漂移(yi)問題(ti)(ti)介紹！ 武(wu)漢(han)觸(chu)摸(mo)屏公司(si)提示(shi)，電(dian)(dian)(dian)容(rong)觸(chu)摸(mo)屏本身實際(ji)是(shi)(shi)一套精密的漏電(dian)(dian)(dian)傳感器，帶手套的手不能(neng)觸(chu)摸(mo)，由(you)于(yu)使用電(dian)(dian)(dian)容(rong)方式，導(dao)致有漂移(yi)現象。電(dian)(dian)(dian)容(rong)觸(chu)摸(mo)屏和電(dian)(dian)(dian)阻觸(chu)摸(mo)屏都是(shi)(shi)電(dian)(dian)(dian)原(yuan)理工作(zuo)方式，電(dian)(dian)(dian)工作(zuo)方式對于(yu)多點觸(chu)摸(mo)，不管是(shi)(shi)多少點，也不管是(shi)(shi)連續的還是(shi)(shi)不連續的都是(shi)(shi)取多點觸(chu)摸(mo)的中心點判斷，因為電(dian)(dian)(dian)流(liu)疊加是(shi)(shi)分不出來誰是(shi)(shi)誰的，沒有辦法。
但是(shi)(shi)(shi)，目(mu)前(qian)來說，電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)觸(chu)(chu)(chu)摸(mo)(mo)屏(ping)(ping)仍(reng)然有(you)不(bu)(bu)少問(wen)題(ti)存在(zai)。武漢公司信為(wei)，觸(chu)(chu)(chu)摸(mo)(mo)屏(ping)(ping)目(mu)前(qian)的(de)(de)(de)(de)(de)(de)透明導電(dian)(dian)(dian)(dian)材(cai)料(liao)ITO--氧化金屬非常脆弱，觸(chu)(chu)(chu)摸(mo)(mo)幾下就(jiu)會損壞，還不(bu)(bu)能(neng)直(zhi)(zhi)(zhi)接用來作(zuo)工(gong)作(zuo)層。材(cai)料(liao)的(de)(de)(de)(de)(de)(de)問(wen)題(ti)一(yi)時還難以解決，只(zhi)好(hao)委曲求(qiu)全(quan)：在(zai)外部增加一(yi)層非常薄的(de)(de)(de)(de)(de)(de)堅(jian)硬玻璃(li)，它(ta)顯然是(shi)(shi)(shi)不(bu)(bu)能(neng)導電(dian)(dian)(dian)(dian)的(de)(de)(de)(de)(de)(de)，直(zhi)(zhi)(zhi)流(liu)是(shi)(shi)(shi)不(bu)(bu)行了，改用高頻交流(liu)信號(hao)，靠人(ren)的(de)(de)(de)(de)(de)(de)手(shou)指(zhi)頭（隔著(zhu)薄玻璃(li)）與工(gong)作(zuo)面形(xing)成的(de)(de)(de)(de)(de)(de)耦合電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)來吸走一(yi)個交流(liu)電(dian)(dian)(dian)(dian)流(liu)，這就(jiu)是(shi)(shi)(shi)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)屏(ping)(ping)"電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)"名字的(de)(de)(de)(de)(de)(de)由來。 電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)觸(chu)(chu)(chu)摸(mo)(mo)屏(ping)(ping)之(zhi)所(suo)以出現(xian)"漂(piao)(piao)移(yi)"的(de)(de)(de)(de)(de)(de)問(wen)題(ti)，是(shi)(shi)(shi)因為(wei)耦合電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)的(de)(de)(de)(de)(de)(de)方式是(shi)(shi)(shi)不(bu)(bu)穩定的(de)(de)(de)(de)(de)(de)，它(ta)直(zhi)(zhi)(zhi)接受溫度、濕度、手(shou)指(zhi)濕潤程度、人(ren)體體重、地(di)面干燥程度影(ying)響(xiang)，受外界(jie)大面積物體的(de)(de)(de)(de)(de)(de)干擾也(ye)(ye)非常大，帶(dai)來了不(bu)(bu)穩定的(de)(de)(de)(de)(de)(de)結(jie)果，這些(xie)都直(zhi)(zhi)(zhi)接違背了作(zuo)為(wei)觸(chu)(chu)(chu)摸(mo)(mo)屏(ping)(ping)這種(zhong)坐標系統的(de)(de)(de)(de)(de)(de)基本(ben)要求(qiu)，不(bu)(bu)可避免的(de)(de)(de)(de)(de)(de)要產生漂(piao)(piao)移(yi)，有(you)的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)觸(chu)(chu)(chu)摸(mo)(mo)屏(ping)(ping)欲求(qiu)通過25點(dian)(dian)(dian)校準法甚至96點(dian)(dian)(dian)校準法來解決漂(piao)(piao)移(yi)問(wen)題(ti)，其實(shi)(shi)(shi)是(shi)(shi)(shi)不(bu)(bu)可能(neng)的(de)(de)(de)(de)(de)(de)，漂(piao)(piao)移(yi)是(shi)(shi)(shi)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)工(gong)作(zuo)的(de)(de)(de)(de)(de)(de)這種(zhong)方式決定的(de)(de)(de)(de)(de)(de)，即使是(shi)(shi)(shi)在(zai)控制器的(de)(de)(de)(de)(de)(de)單片程序上利用動態(tai)計算和經驗值查表(biao)，也(ye)(ye)只(zhi)能(neng)是(shi)(shi)(shi)治標不(bu)(bu)治本(ben)。 其實(shi)(shi)(shi)，多點(dian)(dian)(dian)校準法最早是(shi)(shi)(shi)大屏(ping)(ping)幕投影(ying)觸(chu)(chu)(chu)摸(mo)(mo)板使用的(de)(de)(de)(de)(de)(de)方法，目(mu)的(de)(de)(de)(de)(de)(de)是(shi)(shi)(shi)消(xiao)除坐標對應的(de)(de)(de)(de)(de)(de)線xing失真，電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)觸(chu)(chu)(chu)摸(mo)(mo)屏(ping)(ping)的(de)(de)(de)(de)(de)(de)線xing失真也(ye)(ye)非常厲害，主要是(shi)(shi)(shi)因為(wei)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)屏(ping)(ping)的(de)(de)(de)(de)(de)(de)計算建立在(zai)四個電(dian)(dian)(dian)(dian)流(liu)量與觸(chu)(chu)(chu)摸(mo)(mo)點(dian)(dian)(dian)到四個電(dian)(dian)(dian)(dian)極(ji)的(de)(de)(de)(de)(de)(de)距離成比例(li)的(de)(de)(de)(de)(de)(de)理想(xiang)狀態(tai)上，實(shi)(shi)(shi)際由于受環境電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)、線路寄生電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)和不(bu)(bu)同人(ren)使用的(de)(de)(de)(de)(de)(de)影(ying)響(xiang)。
