電容觸摸(mo)屏(ping)(ping)的(de)漂移問題(ti)。在觸摸(mo)屏(ping)(ping)產品中,電容觸摸(mo)屏(ping)(ping)是(shi)我們常用的(de)觸摸(mo)屏(ping)(ping)方式,那么,對(dui)于(yu)(yu)電容觸摸(mo)屏(ping)(ping)來說,其(qi)產品本身應用比較廣泛,但(dan)是(shi)也存在著不(bu)少問題(ti)。而(er)且由于(yu)(yu)現在科技的(de)發(fa)展程度(du)還無法完(wan)全解決觸摸(mo)屏(ping)(ping)產品在相(xiang)關原理(li)上出現的(de)問題(ti),所以對(dui)于(yu)(yu)這(zhe)些(xie)問題(ti),目前還是(shi)普(pu)遍存在的(de)。
在這(zhe)里(li)武(wu)(wu)漢公(gong)司(si)要跟大家討(tao)論的是(shi)(shi)(shi)關于電(dian)(dian)容(rong)觸(chu)(chu)(chu)(chu)(chu)摸(mo)(mo)屏的"漂移"問題(ti)(ti),這(zhe)個(ge)問題(ti)(ti)比較常見,也(ye)是(shi)(shi)(shi)我們在解(jie)決產品問題(ti)(ti)時主要考(kao)慮的方(fang)面(mian)。 電(dian)(dian)容(rong)觸(chu)(chu)(chu)(chu)(chu)摸(mo)(mo)屏的漂移問題(ti)(ti)介紹! 武(wu)(wu)漢觸(chu)(chu)(chu)(chu)(chu)摸(mo)(mo)屏公(gong)司(si)提示,電(dian)(dian)容(rong)觸(chu)(chu)(chu)(chu)(chu)摸(mo)(mo)屏本身實際(ji)是(shi)(shi)(shi)一套(tao)(tao)精(jing)密的漏電(dian)(dian)傳感器,帶(dai)手(shou)套(tao)(tao)的手(shou)不(bu)(bu)能觸(chu)(chu)(chu)(chu)(chu)摸(mo)(mo),由(you)于使用電(dian)(dian)容(rong)方(fang)式(shi),導致有漂移現(xian)象。電(dian)(dian)容(rong)觸(chu)(chu)(chu)(chu)(chu)摸(mo)(mo)屏和電(dian)(dian)阻觸(chu)(chu)(chu)(chu)(chu)摸(mo)(mo)屏都(dou)是(shi)(shi)(shi)電(dian)(dian)原理工作方(fang)式(shi),電(dian)(dian)工作方(fang)式(shi)對于多(duo)(duo)點(dian)觸(chu)(chu)(chu)(chu)(chu)摸(mo)(mo),不(bu)(bu)管(guan)(guan)是(shi)(shi)(shi)多(duo)(duo)少點(dian),也(ye)不(bu)(bu)管(guan)(guan)是(shi)(shi)(shi)連(lian)續的還是(shi)(shi)(shi)不(bu)(bu)連(lian)續的都(dou)是(shi)(shi)(shi)取多(duo)(duo)點(dian)觸(chu)(chu)(chu)(chu)(chu)摸(mo)(mo)的中心(xin)點(dian)判斷,因(yin)為電(dian)(dian)流(liu)疊加是(shi)(shi)(shi)分(fen)不(bu)(bu)出來誰是(shi)(shi)(shi)誰的,沒有辦法。
但(dan)是,目前來(lai)(lai)說,電(dian)(dian)(dian)(dian)容(rong)觸(chu)摸(mo)屏(ping)(ping)仍然有(you)不(bu)(bu)(bu)少問(wen)題(ti)存在(zai)。武漢(han)公司信為(wei)(wei),觸(chu)摸(mo)屏(ping)(ping)目前的(de)(de)(de)透明導(dao)電(dian)(dian)(dian)(dian)材(cai)料ITO--氧化金屬非(fei)常脆弱(ruo),觸(chu)摸(mo)幾下就會損(sun)壞,還不(bu)(bu)(bu)能(neng)直(zhi)接用(yong)(yong)來(lai)(lai)作(zuo)工作(zuo)層。材(cai)料的(de)(de)(de)問(wen)題(ti)一(yi)時還難以(yi)解(jie)決,只好委曲求(qiu)全:在(zai)外部增加一(yi)層非(fei)常薄(bo)的(de)(de)(de)堅(jian)硬玻(bo)璃,它(ta)顯然是不(bu)(bu)(bu)能(neng)導(dao)電(dian)(dian)(dian)(dian)的(de)(de)(de),直(zhi)流是不(bu)(bu)(bu)行了(le),改用(yong)(yong)高(gao)頻交(jiao)流信號(hao),靠人的(de)(de)(de)手指頭(隔著薄(bo)玻(bo)璃)與(yu)工作(zuo)面形成的(de)(de)(de)耦合電(dian)(dian)(dian)(dian)容(rong)來(lai)(lai)吸(xi)走一(yi)個(ge)交(jiao)流電(dian)(dian)(dian)(dian)流,這就是電(dian)(dian)(dian)(dian)容(rong)屏(ping)(ping)"電(dian)(dian)(dian)(dian)容(rong)"名字的(de)(de)(de)由來(lai)(lai)。 電(dian)(dian)(dian)(dian)容(rong)觸(chu)摸(mo)屏(ping)(ping)之(zhi)所以(yi)出現"漂移"的(de)(de)(de)問(wen)題(ti),是因為(wei)(wei)耦合電(dian)(dian)(dian)(dian)容(rong)的(de)(de)(de)方式是不(bu)(bu)(bu)穩定(ding)的(de)(de)(de),它(ta)直(zhi)接受(shou)溫度、濕(shi)度、手指濕(shi)潤程度、人體體重、地面干(gan)燥程度影響,受(shou)外界大(da)面積物體的(de)(de)(de)干(gan)擾也非(fei)常大(da),帶(dai)來(lai)(lai)了(le)不(bu)(bu)(bu)穩定(ding)的(de)(de)(de)結果,這些(xie)都直(zhi)接違(wei)背了(le)作(zuo)為(wei)(wei)觸(chu)摸(mo)屏(ping)(ping)這種(zhong)坐(zuo)標系統的(de)(de)(de)基本(ben)要求(qiu),不(bu)(bu)(bu)可(ke)避免的(de)(de)(de)要產生(sheng)漂移,有(you)的(de)(de)(de)電(dian)(dian)(dian)(dian)容(rong)觸(chu)摸(mo)屏(ping)(ping)欲(yu)求(qiu)通過25點(dian)校(xiao)準法(fa)(fa)(fa)甚至96點(dian)校(xiao)準法(fa)(fa)(fa)來(lai)(lai)解(jie)決漂移問(wen)題(ti),其實是不(bu)(bu)(bu)可(ke)能(neng)的(de)(de)(de),漂移是電(dian)(dian)(dian)(dian)容(rong)工作(zuo)的(de)(de)(de)這種(zhong)方式決定(ding)的(de)(de)(de),即使是在(zai)控制器(qi)的(de)(de)(de)單片程序(xu)上(shang)利用(yong)(yong)動(dong)態計算和(he)(he)經(jing)驗(yan)值(zhi)查表,也只能(neng)是治標不(bu)(bu)(bu)治本(ben)。 其實,多點(dian)校(xiao)準法(fa)(fa)(fa)最(zui)早是大(da)屏(ping)(ping)幕投影觸(chu)摸(mo)板使用(yong)(yong)的(de)(de)(de)方法(fa)(fa)(fa),目的(de)(de)(de)是消(xiao)除(chu)坐(zuo)標對應(ying)的(de)(de)(de)線(xian)(xian)xing失真,電(dian)(dian)(dian)(dian)容(rong)觸(chu)摸(mo)屏(ping)(ping)的(de)(de)(de)線(xian)(xian)xing失真也非(fei)常厲(li)害,主(zhu)要是因為(wei)(wei)電(dian)(dian)(dian)(dian)容(rong)屏(ping)(ping)的(de)(de)(de)計算建立(li)在(zai)四個(ge)電(dian)(dian)(dian)(dian)流量與(yu)觸(chu)摸(mo)點(dian)到四個(ge)電(dian)(dian)(dian)(dian)極的(de)(de)(de)距離成比例的(de)(de)(de)理想(xiang)狀態上(shang),實際由于受(shou)環(huan)境電(dian)(dian)(dian)(dian)容(rong)、線(xian)(xian)路寄生(sheng)電(dian)(dian)(dian)(dian)容(rong)和(he)(he)不(bu)(bu)(bu)同人使用(yong)(yong)的(de)(de)(de)影響。