電(dian)容觸(chu)摸屏(ping)的漂移問(wen)(wen)題。在觸(chu)摸屏(ping)產(chan)品中,電(dian)容觸(chu)摸屏(ping)是我們常用的觸(chu)摸屏(ping)方式(shi),那么,對(dui)于電(dian)容觸(chu)摸屏(ping)來說(shuo),其(qi)產(chan)品本身(shen)應用比較廣(guang)泛,但是也存在著不少問(wen)(wen)題。而(er)且(qie)由于現在科技的發展程度還無法完全解(jie)決觸(chu)摸屏(ping)產(chan)品在相(xiang)關原理上(shang)出(chu)現的問(wen)(wen)題,所以對(dui)于這些問(wen)(wen)題,目前還是普遍(bian)存在的。
在這(zhe)里(li)武漢(han)公(gong)司要跟大家討論的(de)是(shi)(shi)關于電(dian)(dian)容(rong)(rong)(rong)觸(chu)(chu)摸(mo)(mo)屏的(de)"漂移"問(wen)(wen)題(ti),這(zhe)個(ge)問(wen)(wen)題(ti)比(bi)較常見,也(ye)(ye)是(shi)(shi)我們(men)在解決(jue)產品(pin)問(wen)(wen)題(ti)時主要考慮的(de)方(fang)面。 電(dian)(dian)容(rong)(rong)(rong)觸(chu)(chu)摸(mo)(mo)屏的(de)漂移問(wen)(wen)題(ti)介紹! 武漢(han)觸(chu)(chu)摸(mo)(mo)屏公(gong)司提示,電(dian)(dian)容(rong)(rong)(rong)觸(chu)(chu)摸(mo)(mo)屏本身實際是(shi)(shi)一套精密的(de)漏電(dian)(dian)傳感器,帶手套的(de)手不(bu)能觸(chu)(chu)摸(mo)(mo),由于使用電(dian)(dian)容(rong)(rong)(rong)方(fang)式(shi),導(dao)致(zhi)有漂移現(xian)象。電(dian)(dian)容(rong)(rong)(rong)觸(chu)(chu)摸(mo)(mo)屏和電(dian)(dian)阻觸(chu)(chu)摸(mo)(mo)屏都是(shi)(shi)電(dian)(dian)原理工作方(fang)式(shi),電(dian)(dian)工作方(fang)式(shi)對于多點(dian)(dian)(dian)觸(chu)(chu)摸(mo)(mo),不(bu)管是(shi)(shi)多少點(dian)(dian)(dian),也(ye)(ye)不(bu)管是(shi)(shi)連續的(de)還是(shi)(shi)不(bu)連續的(de)都是(shi)(shi)取多點(dian)(dian)(dian)觸(chu)(chu)摸(mo)(mo)的(de)中心(xin)點(dian)(dian)(dian)判斷,因為電(dian)(dian)流(liu)疊加是(shi)(shi)分(fen)不(bu)出(chu)來誰(shui)是(shi)(shi)誰(shui)的(de),沒有辦法。
但(dan)是(shi),目前來(lai)(lai)說,電(dian)(dian)(dian)容(rong)(rong)觸(chu)(chu)摸(mo)(mo)屏(ping)(ping)(ping)仍然(ran)有不少問題存在(zai)。武漢公司信(xin)為(wei)(wei),觸(chu)(chu)摸(mo)(mo)屏(ping)(ping)(ping)目前的(de)(de)(de)(de)(de)(de)(de)透明導電(dian)(dian)(dian)材料ITO--氧(yang)化金屬非常(chang)脆弱,觸(chu)(chu)摸(mo)(mo)幾下就(jiu)會損壞,還(huan)不能(neng)(neng)(neng)直(zhi)接用(yong)來(lai)(lai)作(zuo)(zuo)工作(zuo)(zuo)層(ceng)。材料的(de)(de)(de)(de)(de)(de)(de)問題一時還(huan)難以解(jie)決,只(zhi)好委曲求全:在(zai)外部增加一層(ceng)非常(chang)薄的(de)(de)(de)(de)(de)(de)(de)堅(jian)硬玻璃,它(ta)顯然(ran)是(shi)不能(neng)(neng)(neng)導電(dian)(dian)(dian)的(de)(de)(de)(de)(de)(de)(de),直(zhi)流(liu)(liu)(liu)(liu)是(shi)不行了,改用(yong)高頻交流(liu)(liu)(liu)(liu)信(xin)號,靠人(ren)的(de)(de)(de)(de)(de)(de)(de)手指頭(隔著薄玻璃)與(yu)工作(zuo)(zuo)面(mian)形成的(de)(de)(de)(de)(de)(de)(de)耦合電(dian)(dian)(dian)容(rong)(rong)來(lai)(lai)吸(xi)走一個(ge)交流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)流(liu)(liu)(liu)(liu),這(zhe)(zhe)就(jiu)是(shi)電(dian)(dian)(dian)容(rong)(rong)屏(ping)(ping)(ping)"電(dian)(dian)(dian)容(rong)(rong)"名(ming)字的(de)(de)(de)(de)(de)(de)(de)由(you)來(lai)(lai)。 電(dian)(dian)(dian)容(rong)(rong)觸(chu)(chu)摸(mo)(mo)屏(ping)(ping)(ping)之(zhi)所以出現"漂移(yi)(yi)"的(de)(de)(de)(de)(de)(de)(de)問題,是(shi)因為(wei)(wei)耦合電(dian)(dian)(dian)容(rong)(rong)的(de)(de)(de)(de)(de)(de)(de)方(fang)式是(shi)不穩定的(de)(de)(de)(de)(de)(de)(de),它(ta)直(zhi)接受溫度、濕度、手指濕潤程(cheng)度、人(ren)體體重、地面(mian)干燥程(cheng)度影響(xiang),受外界(jie)大(da)(da)面(mian)積物體的(de)(de)(de)(de)(de)(de)(de)干擾(rao)也非常(chang)大(da)(da),帶(dai)來(lai)(lai)了不穩定的(de)(de)(de)(de)(de)(de)(de)結果,這(zhe)(zhe)些都直(zhi)接違背(bei)了作(zuo)(zuo)為(wei)(wei)觸(chu)(chu)摸(mo)(mo)屏(ping)(ping)(ping)這(zhe)(zhe)種(zhong)坐(zuo)標系(xi)統(tong)的(de)(de)(de)(de)(de)(de)(de)基本(ben)要(yao)求,不可(ke)避免的(de)(de)(de)(de)(de)(de)(de)要(yao)產生漂移(yi)(yi),有的(de)(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)容(rong)(rong)觸(chu)(chu)摸(mo)(mo)屏(ping)(ping)(ping)欲(yu)求通過25點(dian)校準(zhun)法甚至(zhi)96點(dian)校準(zhun)法來(lai)(lai)解(jie)決漂移(yi)(yi)問題,其實是(shi)不可(ke)能(neng)(neng)(neng)的(de)(de)(de)(de)(de)(de)(de),漂移(yi)(yi)是(shi)電(dian)(dian)(dian)容(rong)(rong)工作(zuo)(zuo)的(de)(de)(de)(de)(de)(de)(de)這(zhe)(zhe)種(zhong)方(fang)式決定的(de)(de)(de)(de)(de)(de)(de),即(ji)使是(shi)在(zai)控制器的(de)(de)(de)(de)(de)(de)(de)單片程(cheng)序上利(li)用(yong)動態計算和經(jing)驗(yan)值查表,也只(zhi)能(neng)(neng)(neng)是(shi)治標不治本(ben)。 其實,多點(dian)校準(zhun)法最早是(shi)大(da)(da)屏(ping)(ping)(ping)幕投影觸(chu)(chu)摸(mo)(mo)板(ban)使用(yong)的(de)(de)(de)(de)(de)(de)(de)方(fang)法,目的(de)(de)(de)(de)(de)(de)(de)是(shi)消(xiao)除坐(zuo)標對應(ying)的(de)(de)(de)(de)(de)(de)(de)線(xian)(xian)xing失真(zhen),電(dian)(dian)(dian)容(rong)(rong)觸(chu)(chu)摸(mo)(mo)屏(ping)(ping)(ping)的(de)(de)(de)(de)(de)(de)(de)線(xian)(xian)xing失真(zhen)也非常(chang)厲害,主要(yao)是(shi)因為(wei)(wei)電(dian)(dian)(dian)容(rong)(rong)屏(ping)(ping)(ping)的(de)(de)(de)(de)(de)(de)(de)計算建立(li)在(zai)四個(ge)電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)量(liang)與(yu)觸(chu)(chu)摸(mo)(mo)點(dian)到四個(ge)電(dian)(dian)(dian)極的(de)(de)(de)(de)(de)(de)(de)距離成比(bi)例的(de)(de)(de)(de)(de)(de)(de)理想狀態上,實際由(you)于受環(huan)境電(dian)(dian)(dian)容(rong)(rong)、線(xian)(xian)路寄(ji)生電(dian)(dian)(dian)容(rong)(rong)和不同人(ren)使用(yong)的(de)(de)(de)(de)(de)(de)(de)影響(xiang)。