電容(rong)觸(chu)(chu)摸屏的漂移(yi)問(wen)題(ti)。在觸(chu)(chu)摸屏產品(pin)中,電容(rong)觸(chu)(chu)摸屏是我們常用(yong)的觸(chu)(chu)摸屏方式,那么,對于電容(rong)觸(chu)(chu)摸屏來說,其產品(pin)本(ben)身應用(yong)比較廣(guang)泛,但是也存在著不少問(wen)題(ti)。而且由(you)于現在科技的發展程(cheng)度還無法完全解決觸(chu)(chu)摸屏產品(pin)在相關原理上(shang)出現的問(wen)題(ti),所(suo)以對于這些問(wen)題(ti),目前還是普(pu)遍存在的。
在(zai)這(zhe)里武(wu)漢(han)公司要跟大家討論(lun)的是關(guan)于電(dian)(dian)(dian)容(rong)觸(chu)(chu)(chu)摸(mo)(mo)屏(ping)的"漂移"問(wen)(wen)題,這(zhe)個問(wen)(wen)題比較常見,也(ye)是我們在(zai)解決產品問(wen)(wen)題時主(zhu)要考慮的方(fang)面。 電(dian)(dian)(dian)容(rong)觸(chu)(chu)(chu)摸(mo)(mo)屏(ping)的漂移問(wen)(wen)題介紹! 武(wu)漢(han)觸(chu)(chu)(chu)摸(mo)(mo)屏(ping)公司提示,電(dian)(dian)(dian)容(rong)觸(chu)(chu)(chu)摸(mo)(mo)屏(ping)本身實際是一套精密的漏(lou)電(dian)(dian)(dian)傳感(gan)器,帶手套的手不(bu)(bu)能觸(chu)(chu)(chu)摸(mo)(mo),由于使用電(dian)(dian)(dian)容(rong)方(fang)式,導致有漂移現象。電(dian)(dian)(dian)容(rong)觸(chu)(chu)(chu)摸(mo)(mo)屏(ping)和電(dian)(dian)(dian)阻(zu)觸(chu)(chu)(chu)摸(mo)(mo)屏(ping)都是電(dian)(dian)(dian)原(yuan)理工作方(fang)式,電(dian)(dian)(dian)工作方(fang)式對于多(duo)點(dian)觸(chu)(chu)(chu)摸(mo)(mo),不(bu)(bu)管是多(duo)少點(dian),也(ye)不(bu)(bu)管是連續的還是不(bu)(bu)連續的都是取(qu)多(duo)點(dian)觸(chu)(chu)(chu)摸(mo)(mo)的中心點(dian)判斷,因為電(dian)(dian)(dian)流疊(die)加是分不(bu)(bu)出(chu)來誰是誰的,沒(mei)有辦法(fa)。
但是(shi)(shi)(shi)(shi),目(mu)前(qian)來(lai)(lai)(lai)說,電(dian)容(rong)(rong)(rong)觸(chu)(chu)摸屏仍然有不(bu)(bu)(bu)(bu)(bu)少問題(ti)存在(zai)。武漢(han)公(gong)司信(xin)為,觸(chu)(chu)摸屏目(mu)前(qian)的(de)(de)透明導電(dian)材料ITO--氧化(hua)金屬非(fei)(fei)常脆弱,觸(chu)(chu)摸幾下就(jiu)會損(sun)壞(huai),還不(bu)(bu)(bu)(bu)(bu)能(neng)直(zhi)(zhi)接(jie)用來(lai)(lai)(lai)作(zuo)工作(zuo)層(ceng)。材料的(de)(de)問題(ti)一(yi)時還難以解決,只好委曲求(qiu)全:在(zai)外部增加一(yi)層(ceng)非(fei)(fei)常薄的(de)(de)堅硬玻璃,它顯然是(shi)(shi)(shi)(shi)不(bu)(bu)(bu)(bu)(bu)能(neng)導電(dian)的(de)(de),直(zhi)(zhi)流(liu)(liu)是(shi)(shi)(shi)(shi)不(bu)(bu)(bu)(bu)(bu)行(xing)了,改用高頻交流(liu)(liu)信(xin)號(hao),靠人(ren)的(de)(de)手指(zhi)頭(隔著薄玻璃)與工作(zuo)面形成(cheng)的(de)(de)耦合(he)(he)電(dian)容(rong)(rong)(rong)來(lai)(lai)(lai)吸走一(yi)個(ge)交流(liu)(liu)電(dian)流(liu)(liu),這就(jiu)是(shi)(shi)(shi)(shi)電(dian)容(rong)(rong)(rong)屏"電(dian)容(rong)(rong)(rong)"名字的(de)(de)由來(lai)(lai)(lai)。 電(dian)容(rong)(rong)(rong)觸(chu)(chu)摸屏之所以出(chu)現"漂移"的(de)(de)問題(ti),是(shi)(shi)(shi)(shi)因為耦合(he)(he)電(dian)容(rong)(rong)(rong)的(de)(de)方式是(shi)(shi)(shi)(shi)不(bu)(bu)(bu)(bu)(bu)穩定的(de)(de),它直(zhi)(zhi)接(jie)受溫度、濕(shi)(shi)度、手指(zhi)濕(shi)(shi)潤程度、人(ren)體體重、地面干燥程度影響,受外界大(da)面積(ji)物體的(de)(de)干擾也(ye)非(fei)(fei)常大(da),帶來(lai)(lai)(lai)了不(bu)(bu)(bu)(bu)(bu)穩定的(de)(de)結果,這些都直(zhi)(zhi)接(jie)違背了作(zuo)為觸(chu)(chu)摸屏這種坐(zuo)標(biao)(biao)系統的(de)(de)基本要(yao)求(qiu),不(bu)(bu)(bu)(bu)(bu)可(ke)(ke)避免(mian)的(de)(de)要(yao)產(chan)生漂移,有的(de)(de)電(dian)容(rong)(rong)(rong)觸(chu)(chu)摸屏欲求(qiu)通過25點(dian)校(xiao)準(zhun)(zhun)法(fa)甚(shen)至96點(dian)校(xiao)準(zhun)(zhun)法(fa)來(lai)(lai)(lai)解決漂移問題(ti),其實(shi)是(shi)(shi)(shi)(shi)不(bu)(bu)(bu)(bu)(bu)可(ke)(ke)能(neng)的(de)(de),漂移是(shi)(shi)(shi)(shi)電(dian)容(rong)(rong)(rong)工作(zuo)的(de)(de)這種方式決定的(de)(de),即(ji)使(shi)是(shi)(shi)(shi)(shi)在(zai)控制(zhi)器的(de)(de)單片程序(xu)上利用動態計算和經(jing)驗值查表,也(ye)只能(neng)是(shi)(shi)(shi)(shi)治標(biao)(biao)不(bu)(bu)(bu)(bu)(bu)治本。 其實(shi),多點(dian)校(xiao)準(zhun)(zhun)法(fa)最早是(shi)(shi)(shi)(shi)大(da)屏幕投影觸(chu)(chu)摸板使(shi)用的(de)(de)方法(fa),目(mu)的(de)(de)是(shi)(shi)(shi)(shi)消除(chu)坐(zuo)標(biao)(biao)對應的(de)(de)線xing失(shi)真(zhen)(zhen),電(dian)容(rong)(rong)(rong)觸(chu)(chu)摸屏的(de)(de)線xing失(shi)真(zhen)(zhen)也(ye)非(fei)(fei)常厲害,主要(yao)是(shi)(shi)(shi)(shi)因為電(dian)容(rong)(rong)(rong)屏的(de)(de)計算建立在(zai)四個(ge)電(dian)流(liu)(liu)量與觸(chu)(chu)摸點(dian)到四個(ge)電(dian)極的(de)(de)距離(li)成(cheng)比(bi)例的(de)(de)理想(xiang)狀態上,實(shi)際由于(yu)受環境(jing)電(dian)容(rong)(rong)(rong)、線路(lu)寄生電(dian)容(rong)(rong)(rong)和不(bu)(bu)(bu)(bu)(bu)同人(ren)使(shi)用的(de)(de)影響。