電容(rong)(rong)觸(chu)摸(mo)屏(ping)的(de)漂移問(wen)題(ti)。在觸(chu)摸(mo)屏(ping)產(chan)品(pin)(pin)中，電容(rong)(rong)觸(chu)摸(mo)屏(ping)是(shi)我們常用的(de)觸(chu)摸(mo)屏(ping)方式，那么，對于(yu)電容(rong)(rong)觸(chu)摸(mo)屏(ping)來(lai)說，其產(chan)品(pin)(pin)本身應用比較(jiao)廣泛，但是(shi)也存(cun)在著不少問(wen)題(ti)。而且由于(yu)現(xian)在科技的(de)發展程度還無法(fa)完全解決觸(chu)摸(mo)屏(ping)產(chan)品(pin)(pin)在相關原理上出現(xian)的(de)問(wen)題(ti)，所以對于(yu)這些(xie)問(wen)題(ti)，目(mu)前還是(shi)普遍(bian)存(cun)在的(de)。
在這(zhe)里武漢(han)公司要跟(gen)大家討論(lun)的(de)(de)(de)是(shi)關于電(dian)(dian)容觸(chu)(chu)(chu)摸屏(ping)的(de)(de)(de)"漂移"問(wen)(wen)(wen)題(ti)，這(zhe)個問(wen)(wen)(wen)題(ti)比較常見，也(ye)是(shi)我們在解決(jue)產品問(wen)(wen)(wen)題(ti)時主要考慮的(de)(de)(de)方(fang)(fang)面。 電(dian)(dian)容觸(chu)(chu)(chu)摸屏(ping)的(de)(de)(de)漂移問(wen)(wen)(wen)題(ti)介紹！ 武漢(han)觸(chu)(chu)(chu)摸屏(ping)公司提示(shi)，電(dian)(dian)容觸(chu)(chu)(chu)摸屏(ping)本身實際是(shi)一套(tao)精密的(de)(de)(de)漏電(dian)(dian)傳(chuan)感器，帶(dai)手套(tao)的(de)(de)(de)手不(bu)能觸(chu)(chu)(chu)摸，由于使用電(dian)(dian)容方(fang)(fang)式，導(dao)致有(you)(you)漂移現象(xiang)。電(dian)(dian)容觸(chu)(chu)(chu)摸屏(ping)和電(dian)(dian)阻觸(chu)(chu)(chu)摸屏(ping)都是(shi)電(dian)(dian)原理工(gong)作方(fang)(fang)式，電(dian)(dian)工(gong)作方(fang)(fang)式對于多點觸(chu)(chu)(chu)摸，不(bu)管是(shi)多少點，也(ye)不(bu)管是(shi)連續(xu)的(de)(de)(de)還是(shi)不(bu)連續(xu)的(de)(de)(de)都是(shi)取多點觸(chu)(chu)(chu)摸的(de)(de)(de)中(zhong)心(xin)點判(pan)斷(duan)，因為(wei)電(dian)(dian)流疊加是(shi)分不(bu)出來誰是(shi)誰的(de)(de)(de)，沒有(you)(you)辦法(fa)。
但是(shi)(shi)(shi)(shi)(shi)，目前(qian)來說，電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)觸摸屏(ping)(ping)仍(reng)然有不(bu)少問題(ti)存在(zai)。武漢(han)公司信(xin)為，觸摸屏(ping)(ping)目前(qian)的(de)(de)(de)(de)(de)(de)透明導電(dian)(dian)(dian)(dian)(dian)(dian)材料ITO--氧化(hua)金屬非常脆弱(ruo)，觸摸幾(ji)下就(jiu)會(hui)損壞，還(huan)不(bu)能直接(jie)用(yong)來作工(gong)作層(ceng)(ceng)。材料的(de)(de)(de)(de)(de)(de)問題(ti)一時還(huan)難以解(jie)(jie)決，只(zhi)好(hao)委(wei)曲求全：在(zai)外部增加(jia)一層(ceng)(ceng)非常薄的(de)(de)(de)(de)(de)(de)堅硬(ying)玻璃，它(ta)顯然是(shi)(shi)(shi)(shi)(shi)不(bu)能導電(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)(de)(de)(de)，直流(liu)是(shi)(shi)(shi)(shi)(shi)不(bu)行了(le)，改(gai)用(yong)高頻交流(liu)信(xin)號，靠人(ren)的(de)(de)(de)(de)(de)(de)手指頭（隔著薄玻璃）與(yu)工(gong)作面形成的(de)(de)(de)(de)(de)(de)耦合(he)電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)來吸走一個交流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)，這就(jiu)是(shi)(shi)(shi)(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)屏(ping)(ping)"電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)"名字的(de)(de)(de)(de)(de)(de)由(you)來。 電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)觸摸屏(ping)(ping)之(zhi)所以出現"漂移"的(de)(de)(de)(de)(de)(de)問題(ti)，是(shi)(shi)(shi)(shi)(shi)因(yin)為耦合(he)電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)的(de)(de)(de)(de)(de)(de)方(fang)式是(shi)(shi)(shi)(shi)(shi)不(bu)穩定的(de)(de)(de)(de)(de)(de)，它(ta)直接(jie)受溫(wen)度、濕(shi)度、手指濕(shi)潤(run)程度、人(ren)體(ti)體(ti)重(zhong)、地面干(gan)燥(zao)程度影(ying)響，受外界大(da)(da)面積(ji)物體(ti)的(de)(de)(de)(de)(de)(de)干(gan)擾也非常大(da)(da)，帶來了(le)不(bu)穩定的(de)(de)(de)(de)(de)(de)結果，這些都直接(jie)違背了(le)作為觸摸屏(ping)(ping)這種坐標系統的(de)(de)(de)(de)(de)(de)基本(ben)(ben)要(yao)求，不(bu)可避免的(de)(de)(de)(de)(de)(de)要(yao)產生漂移，有的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)觸摸屏(ping)(ping)欲(yu)求通過25點校準(zhun)法(fa)甚至96點校準(zhun)法(fa)來解(jie)(jie)決漂移問題(ti)，其實是(shi)(shi)(shi)(shi)(shi)不(bu)可能的(de)(de)(de)(de)(de)(de)，漂移是(shi)(shi)(shi)(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)工(gong)作的(de)(de)(de)(de)(de)(de)這種方(fang)式決定的(de)(de)(de)(de)(de)(de)，即使(shi)(shi)(shi)是(shi)(shi)(shi)(shi)(shi)在(zai)控制器的(de)(de)(de)(de)(de)(de)單片程序上利用(yong)動(dong)態(tai)計算和經驗值查表，也只(zhi)能是(shi)(shi)(shi)(shi)(shi)治(zhi)標不(bu)治(zhi)本(ben)(ben)。 其實，多(duo)點校準(zhun)法(fa)最早是(shi)(shi)(shi)(shi)(shi)大(da)(da)屏(ping)(ping)幕投影(ying)觸摸板使(shi)(shi)(shi)用(yong)的(de)(de)(de)(de)(de)(de)方(fang)法(fa)，目的(de)(de)(de)(de)(de)(de)是(shi)(shi)(shi)(shi)(shi)消(xiao)除坐標對應(ying)的(de)(de)(de)(de)(de)(de)線xing失真，電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)觸摸屏(ping)(ping)的(de)(de)(de)(de)(de)(de)線xing失真也非常厲害(hai)，主要(yao)是(shi)(shi)(shi)(shi)(shi)因(yin)為電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)屏(ping)(ping)的(de)(de)(de)(de)(de)(de)計算建立在(zai)四個電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)量與(yu)觸摸點到四個電(dian)(dian)(dian)(dian)(dian)(dian)極的(de)(de)(de)(de)(de)(de)距離成比例的(de)(de)(de)(de)(de)(de)理想(xiang)狀態(tai)上，實際(ji)由(you)于(yu)受環境(jing)電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)、線路寄生電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)和不(bu)同人(ren)使(shi)(shi)(shi)用(yong)的(de)(de)(de)(de)(de)(de)影(ying)響。
