電容(rong)觸(chu)摸屏(ping)(ping)的(de)漂移(yi)問題。在(zai)觸(chu)摸屏(ping)(ping)產(chan)品(pin)中，電容(rong)觸(chu)摸屏(ping)(ping)是我(wo)們(men)常用(yong)的(de)觸(chu)摸屏(ping)(ping)方式，那么，對于電容(rong)觸(chu)摸屏(ping)(ping)來(lai)說，其產(chan)品(pin)本身(shen)應用(yong)比(bi)較廣泛，但(dan)是也存(cun)在(zai)著不少問題。而且由于現在(zai)科(ke)技的(de)發展程度還(huan)無法(fa)完全(quan)解(jie)決(jue)觸(chu)摸屏(ping)(ping)產(chan)品(pin)在(zai)相關原理上出現的(de)問題，所以對于這些(xie)問題，目前還(huan)是普遍存(cun)在(zai)的(de)。
在(zai)這里武(wu)漢公司要(yao)跟大家討論的(de)(de)(de)(de)是(shi)關于(yu)電(dian)(dian)容(rong)觸(chu)(chu)摸(mo)屏的(de)(de)(de)(de)"漂移"問(wen)(wen)題，這個問(wen)(wen)題比較(jiao)常(chang)見，也是(shi)我們(men)在(zai)解決(jue)產品問(wen)(wen)題時(shi)主要(yao)考慮的(de)(de)(de)(de)方(fang)面。 電(dian)(dian)容(rong)觸(chu)(chu)摸(mo)屏的(de)(de)(de)(de)漂移問(wen)(wen)題介紹！ 武(wu)漢觸(chu)(chu)摸(mo)屏公司提(ti)示，電(dian)(dian)容(rong)觸(chu)(chu)摸(mo)屏本身實(shi)際是(shi)一套(tao)精密(mi)的(de)(de)(de)(de)漏電(dian)(dian)傳(chuan)感器，帶手套(tao)的(de)(de)(de)(de)手不能觸(chu)(chu)摸(mo)，由于(yu)使用電(dian)(dian)容(rong)方(fang)式(shi)(shi)，導(dao)致有漂移現象。電(dian)(dian)容(rong)觸(chu)(chu)摸(mo)屏和(he)電(dian)(dian)阻(zu)觸(chu)(chu)摸(mo)屏都是(shi)電(dian)(dian)原理工作方(fang)式(shi)(shi)，電(dian)(dian)工作方(fang)式(shi)(shi)對于(yu)多(duo)點(dian)觸(chu)(chu)摸(mo)，不管是(shi)多(duo)少點(dian)，也不管是(shi)連(lian)續的(de)(de)(de)(de)還是(shi)不連(lian)續的(de)(de)(de)(de)都是(shi)取多(duo)點(dian)觸(chu)(chu)摸(mo)的(de)(de)(de)(de)中心點(dian)判斷，因(yin)為電(dian)(dian)流疊加(jia)是(shi)分不出來(lai)誰是(shi)誰的(de)(de)(de)(de)，沒有辦法。
但是(shi)(shi)(shi)(shi)(shi)，目(mu)(mu)(mu)前來說(shuo)，電(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)觸(chu)(chu)(chu)摸屏(ping)(ping)(ping)仍然有(you)不(bu)(bu)少問題(ti)存在。武漢公司信為(wei)，觸(chu)(chu)(chu)摸屏(ping)(ping)(ping)目(mu)(mu)(mu)前的(de)(de)(de)(de)(de)(de)透明導(dao)電(dian)(dian)(dian)材料(liao)ITO--氧化(hua)金屬非(fei)(fei)常脆弱(ruo)，觸(chu)(chu)(chu)摸幾下(xia)就會損壞，還不(bu)(bu)能(neng)直(zhi)接(jie)用來作工(gong)作層。材料(liao)的(de)(de)(de)(de)(de)(de)問題(ti)一(yi)(yi)時還難以解決，只好委曲求全：在外部增加(jia)一(yi)(yi)層非(fei)(fei)常薄的(de)(de)(de)(de)(de)(de)堅硬(ying)玻璃，它顯然是(shi)(shi)(shi)(shi)(shi)不(bu)(bu)能(neng)導(dao)電(dian)(dian)(dian)的(de)(de)(de)(de)(de)(de)，直(zhi)流(liu)是(shi)(shi)(shi)(shi)(shi)不(bu)(bu)行了，改用高頻交流(liu)信號，靠(kao)人的(de)(de)(de)(de)(de)(de)手指頭(tou)（隔著薄玻璃）與工(gong)作面形成的(de)(de)(de)(de)(de)(de)耦合電(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)來吸走一(yi)(yi)個(ge)交流(liu)電(dian)(dian)(dian)流(liu)，這就是(shi)(shi)(shi)(shi)(shi)電(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)屏(ping)(ping)(ping)"電(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)"名字的(de)(de)(de)(de)(de)(de)由來。 電(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)觸(chu)(chu)(chu)摸屏(ping)(ping)(ping)之所以出現"漂(piao)移(yi)(yi)"的(de)(de)(de)(de)(de)(de)問題(ti)，是(shi)(shi)(shi)(shi)(shi)因為(wei)耦合電(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)的(de)(de)(de)(de)(de)(de)方(fang)式(shi)是(shi)(shi)(shi)(shi)(shi)不(bu)(bu)穩(wen)定的(de)(de)(de)(de)(de)(de)，它直(zhi)接(jie)受(shou)溫度(du)、濕度(du)、手指濕潤程(cheng)度(du)、人體體重、地面干燥程(cheng)度(du)影響，受(shou)外界大面積物體的(de)(de)(de)(de)(de)(de)干擾也非(fei)(fei)常大，帶(dai)來了不(bu)(bu)穩(wen)定的(de)(de)(de)(de)(de)(de)結(jie)果，這些都直(zhi)接(jie)違背了作為(wei)觸(chu)(chu)(chu)摸屏(ping)(ping)(ping)這種(zhong)坐標(biao)系(xi)統的(de)(de)(de)(de)(de)(de)基(ji)本要(yao)求，不(bu)(bu)可避免(mian)的(de)(de)(de)(de)(de)(de)要(yao)產(chan)生(sheng)漂(piao)移(yi)(yi)，有(you)的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)觸(chu)(chu)(chu)摸屏(ping)(ping)(ping)欲求通(tong)過25點校準(zhun)法(fa)(fa)(fa)甚至(zhi)96點校準(zhun)法(fa)(fa)(fa)來解決漂(piao)移(yi)(yi)問題(ti)，其(qi)實(shi)是(shi)(shi)(shi)(shi)(shi)不(bu)(bu)可能(neng)的(de)(de)(de)(de)(de)(de)，漂(piao)移(yi)(yi)是(shi)(shi)(shi)(shi)(shi)電(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)工(gong)作的(de)(de)(de)(de)(de)(de)這種(zhong)方(fang)式(shi)決定的(de)(de)(de)(de)(de)(de)，即使(shi)(shi)是(shi)(shi)(shi)(shi)(shi)在控制器的(de)(de)(de)(de)(de)(de)單片(pian)程(cheng)序(xu)上利用動態計算和(he)經驗值查表，也只能(neng)是(shi)(shi)(shi)(shi)(shi)治(zhi)標(biao)不(bu)(bu)治(zhi)本。 其(qi)實(shi)，多點校準(zhun)法(fa)(fa)(fa)最早是(shi)(shi)(shi)(shi)(shi)大屏(ping)(ping)(ping)幕投(tou)影觸(chu)(chu)(chu)摸板使(shi)(shi)用的(de)(de)(de)(de)(de)(de)方(fang)法(fa)(fa)(fa)，目(mu)(mu)(mu)的(de)(de)(de)(de)(de)(de)是(shi)(shi)(shi)(shi)(shi)消除坐標(biao)對應的(de)(de)(de)(de)(de)(de)線(xian)xing失(shi)真(zhen)，電(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)觸(chu)(chu)(chu)摸屏(ping)(ping)(ping)的(de)(de)(de)(de)(de)(de)線(xian)xing失(shi)真(zhen)也非(fei)(fei)常厲(li)害，主要(yao)是(shi)(shi)(shi)(shi)(shi)因為(wei)電(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)屏(ping)(ping)(ping)的(de)(de)(de)(de)(de)(de)計算建立在四個(ge)電(dian)(dian)(dian)流(liu)量(liang)與觸(chu)(chu)(chu)摸點到四個(ge)電(dian)(dian)(dian)極的(de)(de)(de)(de)(de)(de)距離(li)成比(bi)例的(de)(de)(de)(de)(de)(de)理想(xiang)狀態上，實(shi)際(ji)由于受(shou)環(huan)境(jing)電(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)、線(xian)路寄生(sheng)電(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)和(he)不(bu)(bu)同人使(shi)(shi)用的(de)(de)(de)(de)(de)(de)影響。
