電容觸(chu)(chu)摸(mo)屏(ping)的(de)(de)(de)漂移問題。在(zai)觸(chu)(chu)摸(mo)屏(ping)產品中，電容觸(chu)(chu)摸(mo)屏(ping)是(shi)我們常用(yong)的(de)(de)(de)觸(chu)(chu)摸(mo)屏(ping)方式，那么，對于電容觸(chu)(chu)摸(mo)屏(ping)來(lai)說(shuo)，其產品本身應用(yong)比較廣泛，但是(shi)也存(cun)(cun)在(zai)著(zhu)不少問題。而且(qie)由(you)于現在(zai)科(ke)技的(de)(de)(de)發展程度(du)還(huan)(huan)無法完全解(jie)決觸(chu)(chu)摸(mo)屏(ping)產品在(zai)相(xiang)關(guan)原理(li)上出(chu)現的(de)(de)(de)問題，所(suo)以對于這(zhe)些問題，目前還(huan)(huan)是(shi)普遍存(cun)(cun)在(zai)的(de)(de)(de)。
在這(zhe)里武漢公(gong)司要跟(gen)大家討論的(de)(de)(de)是(shi)(shi)關于(yu)電(dian)(dian)容(rong)觸(chu)(chu)摸屏(ping)的(de)(de)(de)"漂移(yi)"問(wen)題(ti)，這(zhe)個問(wen)題(ti)比(bi)較常(chang)見，也(ye)是(shi)(shi)我(wo)們在解(jie)決(jue)產品問(wen)題(ti)時主要考慮的(de)(de)(de)方(fang)面。 電(dian)(dian)容(rong)觸(chu)(chu)摸屏(ping)的(de)(de)(de)漂移(yi)問(wen)題(ti)介(jie)紹！ 武漢觸(chu)(chu)摸屏(ping)公(gong)司提(ti)示，電(dian)(dian)容(rong)觸(chu)(chu)摸屏(ping)本身實(shi)際是(shi)(shi)一套精密(mi)的(de)(de)(de)漏電(dian)(dian)傳(chuan)感(gan)器，帶(dai)手(shou)套的(de)(de)(de)手(shou)不能觸(chu)(chu)摸，由于(yu)使用(yong)電(dian)(dian)容(rong)方(fang)式(shi)，導(dao)致有(you)漂移(yi)現象。電(dian)(dian)容(rong)觸(chu)(chu)摸屏(ping)和電(dian)(dian)阻觸(chu)(chu)摸屏(ping)都是(shi)(shi)電(dian)(dian)原理工(gong)作方(fang)式(shi)，電(dian)(dian)工(gong)作方(fang)式(shi)對于(yu)多點觸(chu)(chu)摸，不管是(shi)(shi)多少點，也(ye)不管是(shi)(shi)連續的(de)(de)(de)還(huan)是(shi)(shi)不連續的(de)(de)(de)都是(shi)(shi)取(qu)多點觸(chu)(chu)摸的(de)(de)(de)中心點判斷，因為電(dian)(dian)流疊加是(shi)(shi)分(fen)不出(chu)來誰(shui)是(shi)(shi)誰(shui)的(de)(de)(de)，沒有(you)辦法。
但是(shi)(shi)(shi)，目前來(lai)說，電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)觸(chu)(chu)摸(mo)(mo)屏(ping)(ping)仍(reng)然(ran)有不(bu)少問題存在(zai)。武漢公(gong)司信為(wei)(wei)，觸(chu)(chu)摸(mo)(mo)屏(ping)(ping)目前的(de)(de)(de)(de)(de)(de)透(tou)明導電(dian)(dian)(dian)(dian)(dian)材(cai)料ITO--氧化金屬非(fei)(fei)常(chang)脆弱，觸(chu)(chu)摸(mo)(mo)幾下就會損壞，還不(bu)能(neng)直(zhi)接用(yong)來(lai)作工(gong)作層。材(cai)料的(de)(de)(de)(de)(de)(de)問題一時(shi)還難以解決(jue)，只好委(wei)曲求(qiu)全：在(zai)外(wai)部增(zeng)加一層非(fei)(fei)常(chang)薄的(de)(de)(de)(de)(de)(de)堅硬玻璃，它(ta)顯然(ran)是(shi)(shi)(shi)不(bu)能(neng)導電(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)(de)(de)(de)，直(zhi)流是(shi)(shi)(shi)不(bu)行了(le)，改用(yong)高頻交流信號，靠人(ren)(ren)的(de)(de)(de)(de)(de)(de)手指(zhi)(zhi)頭(tou)（隔著薄玻璃）與工(gong)作面(mian)(mian)形成(cheng)的(de)(de)(de)(de)(de)(de)耦(ou)合(he)電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)來(lai)吸走一個(ge)交流電(dian)(dian)(dian)(dian)(dian)流，這(zhe)(zhe)就是(shi)(shi)(shi)電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)屏(ping)(ping)"電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)"名字的(de)(de)(de)(de)(de)(de)由來(lai)。 電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)觸(chu)(chu)摸(mo)(mo)屏(ping)(ping)之所以出現(xian)"漂(piao)移"的(de)(de)(de)(de)(de)(de)問題，是(shi)(shi)(shi)因(yin)為(wei)(wei)耦(ou)合(he)電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)的(de)(de)(de)(de)(de)(de)方(fang)式是(shi)(shi)(shi)不(bu)穩定(ding)(ding)的(de)(de)(de)(de)(de)(de)，它(ta)直(zhi)接受(shou)(shou)溫度、濕度、手指(zhi)(zhi)濕潤程度、人(ren)(ren)體體重、地面(mian)(mian)干燥(zao)程度影響(xiang)(xiang)，受(shou)(shou)外(wai)界大(da)面(mian)(mian)積物體的(de)(de)(de)(de)(de)(de)干擾(rao)也(ye)非(fei)(fei)常(chang)大(da)，帶來(lai)了(le)不(bu)穩定(ding)(ding)的(de)(de)(de)(de)(de)(de)結果，這(zhe)(zhe)些都直(zhi)接違背了(le)作為(wei)(wei)觸(chu)(chu)摸(mo)(mo)屏(ping)(ping)這(zhe)(zhe)種坐(zuo)標系統的(de)(de)(de)(de)(de)(de)基本(ben)要(yao)求(qiu)，不(bu)可避免的(de)(de)(de)(de)(de)(de)要(yao)產生(sheng)漂(piao)移，有的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)觸(chu)(chu)摸(mo)(mo)屏(ping)(ping)欲(yu)求(qiu)通過(guo)25點(dian)校準法甚(shen)至96點(dian)校準法來(lai)解決(jue)漂(piao)移問題，其實是(shi)(shi)(shi)不(bu)可能(neng)的(de)(de)(de)(de)(de)(de)，漂(piao)移是(shi)(shi)(shi)電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)工(gong)作的(de)(de)(de)(de)(de)(de)這(zhe)(zhe)種方(fang)式決(jue)定(ding)(ding)的(de)(de)(de)(de)(de)(de)，即使(shi)是(shi)(shi)(shi)在(zai)控制器的(de)(de)(de)(de)(de)(de)單片程序上利(li)用(yong)動(dong)態計(ji)算(suan)和(he)經驗值查表，也(ye)只能(neng)是(shi)(shi)(shi)治標不(bu)治本(ben)。 其實，多點(dian)校準法最(zui)早是(shi)(shi)(shi)大(da)屏(ping)(ping)幕投影觸(chu)(chu)摸(mo)(mo)板使(shi)用(yong)的(de)(de)(de)(de)(de)(de)方(fang)法，目的(de)(de)(de)(de)(de)(de)是(shi)(shi)(shi)消(xiao)除坐(zuo)標對應的(de)(de)(de)(de)(de)(de)線(xian)xing失真(zhen)，電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)觸(chu)(chu)摸(mo)(mo)屏(ping)(ping)的(de)(de)(de)(de)(de)(de)線(xian)xing失真(zhen)也(ye)非(fei)(fei)常(chang)厲(li)害(hai)，主要(yao)是(shi)(shi)(shi)因(yin)為(wei)(wei)電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)屏(ping)(ping)的(de)(de)(de)(de)(de)(de)計(ji)算(suan)建立在(zai)四(si)個(ge)電(dian)(dian)(dian)(dian)(dian)流量(liang)與觸(chu)(chu)摸(mo)(mo)點(dian)到四(si)個(ge)電(dian)(dian)(dian)(dian)(dian)極的(de)(de)(de)(de)(de)(de)距(ju)離成(cheng)比例的(de)(de)(de)(de)(de)(de)理想狀態上，實際(ji)由于受(shou)(shou)環(huan)境電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)、線(xian)路寄生(sheng)電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)和(he)不(bu)同人(ren)(ren)使(shi)用(yong)的(de)(de)(de)(de)(de)(de)影響(xiang)(xiang)。
