電容觸摸(mo)(mo)屏的(de)漂(piao)移問題(ti)。在觸摸(mo)(mo)屏產品中,電容觸摸(mo)(mo)屏是(shi)我們常(chang)用(yong)的(de)觸摸(mo)(mo)屏方式,那么,對(dui)(dui)于(yu)(yu)電容觸摸(mo)(mo)屏來說(shuo),其產品本身應用(yong)比較(jiao)廣泛,但是(shi)也存在著不(bu)少問題(ti)。而且由于(yu)(yu)現在科技的(de)發展程度還無法(fa)完全解決觸摸(mo)(mo)屏產品在相關原理上(shang)出現的(de)問題(ti),所以(yi)對(dui)(dui)于(yu)(yu)這些問題(ti),目前還是(shi)普遍存在的(de)。
在這里武(wu)漢公司(si)(si)要跟大家(jia)討論的(de)(de)是(shi)關(guan)于電(dian)容(rong)(rong)觸(chu)(chu)摸(mo)(mo)(mo)(mo)屏(ping)的(de)(de)"漂(piao)移(yi)(yi)"問(wen)(wen)(wen)題,這個(ge)問(wen)(wen)(wen)題比較常見,也(ye)是(shi)我們在解決產品問(wen)(wen)(wen)題時主要考(kao)慮的(de)(de)方(fang)(fang)(fang)面(mian)。 電(dian)容(rong)(rong)觸(chu)(chu)摸(mo)(mo)(mo)(mo)屏(ping)的(de)(de)漂(piao)移(yi)(yi)問(wen)(wen)(wen)題介紹! 武(wu)漢觸(chu)(chu)摸(mo)(mo)(mo)(mo)屏(ping)公司(si)(si)提(ti)示(shi),電(dian)容(rong)(rong)觸(chu)(chu)摸(mo)(mo)(mo)(mo)屏(ping)本(ben)身實際是(shi)一套精(jing)密的(de)(de)漏電(dian)傳感器(qi),帶手(shou)套的(de)(de)手(shou)不(bu)能觸(chu)(chu)摸(mo)(mo)(mo)(mo),由于使(shi)用電(dian)容(rong)(rong)方(fang)(fang)(fang)式(shi),導致(zhi)有漂(piao)移(yi)(yi)現象。電(dian)容(rong)(rong)觸(chu)(chu)摸(mo)(mo)(mo)(mo)屏(ping)和電(dian)阻觸(chu)(chu)摸(mo)(mo)(mo)(mo)屏(ping)都是(shi)電(dian)原理工作方(fang)(fang)(fang)式(shi),電(dian)工作方(fang)(fang)(fang)式(shi)對于多點觸(chu)(chu)摸(mo)(mo)(mo)(mo),不(bu)管是(shi)多少點,也(ye)不(bu)管是(shi)連續(xu)的(de)(de)還是(shi)不(bu)連續(xu)的(de)(de)都是(shi)取多點觸(chu)(chu)摸(mo)(mo)(mo)(mo)的(de)(de)中心點判斷,因為電(dian)流疊加是(shi)分不(bu)出來誰是(shi)誰的(de)(de),沒(mei)有辦(ban)法。
但是(shi)(shi),目前來(lai)(lai)說,電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)觸(chu)(chu)摸(mo)(mo)(mo)屏(ping)(ping)(ping)仍然(ran)有(you)不(bu)少問題(ti)(ti)存(cun)在(zai)(zai)。武漢公司信(xin)為,觸(chu)(chu)摸(mo)(mo)(mo)屏(ping)(ping)(ping)目前的(de)(de)透明導電(dian)(dian)(dian)(dian)材料(liao)ITO--氧化金屬非(fei)常(chang)脆(cui)弱(ruo),觸(chu)(chu)摸(mo)(mo)(mo)幾下就(jiu)會損壞(huai),還(huan)不(bu)能(neng)直(zhi)接(jie)用(yong)來(lai)(lai)作工(gong)作層。材料(liao)的(de)(de)問題(ti)(ti)一(yi)時還(huan)難(nan)以解決(jue)(jue),只好委曲求(qiu)全:在(zai)(zai)外部增加一(yi)層非(fei)常(chang)薄的(de)(de)堅(jian)硬(ying)玻璃(li),它顯然(ran)是(shi)(shi)不(bu)能(neng)導電(dian)(dian)(dian)(dian)的(de)(de),直(zhi)流(liu)是(shi)(shi)不(bu)行了,改(gai)用(yong)高(gao)頻交(jiao)流(liu)信(xin)號,靠人(ren)的(de)(de)手指頭(tou)(隔著(zhu)薄玻璃(li))與工(gong)作面(mian)形成的(de)(de)耦(ou)合(he)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)來(lai)(lai)吸走一(yi)個交(jiao)流(liu)電(dian)(dian)(dian)(dian)流(liu),這(zhe)就(jiu)是(shi)(shi)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)屏(ping)(ping)(ping)"電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)"名(ming)字的(de)(de)由來(lai)(lai)。 電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)觸(chu)(chu)摸(mo)(mo)(mo)屏(ping)(ping)(ping)之所以出現"漂移"的(de)(de)問題(ti)(ti),是(shi)(shi)因(yin)為耦(ou)合(he)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)的(de)(de)方式是(shi)(shi)不(bu)穩定的(de)(de),它直(zhi)接(jie)受溫度(du)(du)(du)(du)、濕(shi)度(du)(du)(du)(du)、手指濕(shi)潤程度(du)(du)(du)(du)、人(ren)體(ti)體(ti)重、地(di)面(mian)干燥程度(du)(du)(du)(du)影響,受外界大(da)面(mian)積物體(ti)的(de)(de)干擾也(ye)(ye)非(fei)常(chang)大(da),帶(dai)來(lai)(lai)了不(bu)穩定的(de)(de)結果,這(zhe)些都直(zhi)接(jie)違(wei)背(bei)了作為觸(chu)(chu)摸(mo)(mo)(mo)屏(ping)(ping)(ping)這(zhe)種坐標系(xi)統的(de)(de)基(ji)本要(yao)求(qiu),不(bu)可(ke)避免的(de)(de)要(yao)產(chan)生漂移,有(you)的(de)(de)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)觸(chu)(chu)摸(mo)(mo)(mo)屏(ping)(ping)(ping)欲(yu)求(qiu)通(tong)過25點校(xiao)(xiao)準(zhun)法甚至96點校(xiao)(xiao)準(zhun)法來(lai)(lai)解決(jue)(jue)漂移問題(ti)(ti),其實是(shi)(shi)不(bu)可(ke)能(neng)的(de)(de),漂移是(shi)(shi)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)工(gong)作的(de)(de)這(zhe)種方式決(jue)(jue)定的(de)(de),即使是(shi)(shi)在(zai)(zai)控制器的(de)(de)單片(pian)程序上利用(yong)動(dong)態計(ji)算和經(jing)驗值查表(biao),也(ye)(ye)只能(neng)是(shi)(shi)治標不(bu)治本。 其實,多點校(xiao)(xiao)準(zhun)法最(zui)早是(shi)(shi)大(da)屏(ping)(ping)(ping)幕(mu)投影觸(chu)(chu)摸(mo)(mo)(mo)板使用(yong)的(de)(de)方法,目的(de)(de)是(shi)(shi)消除(chu)坐標對應的(de)(de)線(xian)(xian)xing失真,電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)觸(chu)(chu)摸(mo)(mo)(mo)屏(ping)(ping)(ping)的(de)(de)線(xian)(xian)xing失真也(ye)(ye)非(fei)常(chang)厲害,主(zhu)要(yao)是(shi)(shi)因(yin)為電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)屏(ping)(ping)(ping)的(de)(de)計(ji)算建立在(zai)(zai)四(si)個電(dian)(dian)(dian)(dian)流(liu)量與觸(chu)(chu)摸(mo)(mo)(mo)點到四(si)個電(dian)(dian)(dian)(dian)極的(de)(de)距離成比例的(de)(de)理想狀(zhuang)態上,實際由于受環境(jing)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)、線(xian)(xian)路寄生電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)和不(bu)同(tong)人(ren)使用(yong)的(de)(de)影響。