電容觸(chu)摸(mo)屏的(de)漂移(yi)問(wen)題。在(zai)觸(chu)摸(mo)屏產(chan)品中,電容觸(chu)摸(mo)屏是(shi)(shi)我們常用的(de)觸(chu)摸(mo)屏方式(shi),那么,對(dui)(dui)于電容觸(chu)摸(mo)屏來說(shuo),其(qi)產(chan)品本身(shen)應用比較廣泛,但(dan)是(shi)(shi)也存(cun)在(zai)著不少問(wen)題。而且由于現在(zai)科技的(de)發展程度還(huan)無法完全解決觸(chu)摸(mo)屏產(chan)品在(zai)相(xiang)關原理(li)上出現的(de)問(wen)題,所以對(dui)(dui)于這些問(wen)題,目前還(huan)是(shi)(shi)普遍(bian)存(cun)在(zai)的(de)。
在(zai)這里(li)武(wu)(wu)漢公(gong)司(si)(si)要(yao)跟大家討論的是(shi)(shi)關于電(dian)(dian)容觸(chu)摸(mo)屏(ping)的"漂移"問(wen)題,這個問(wen)題比較常(chang)見,也(ye)是(shi)(shi)我們在(zai)解決產品問(wen)題時主要(yao)考慮的方(fang)面。 電(dian)(dian)容觸(chu)摸(mo)屏(ping)的漂移問(wen)題介紹! 武(wu)(wu)漢觸(chu)摸(mo)屏(ping)公(gong)司(si)(si)提示(shi),電(dian)(dian)容觸(chu)摸(mo)屏(ping)本身實際是(shi)(shi)一套(tao)精密的漏電(dian)(dian)傳感器(qi),帶手(shou)套(tao)的手(shou)不能觸(chu)摸(mo),由于使用電(dian)(dian)容方(fang)式,導致有(you)漂移現(xian)象。電(dian)(dian)容觸(chu)摸(mo)屏(ping)和電(dian)(dian)阻觸(chu)摸(mo)屏(ping)都是(shi)(shi)電(dian)(dian)原理工(gong)作(zuo)方(fang)式,電(dian)(dian)工(gong)作(zuo)方(fang)式對于多點觸(chu)摸(mo),不管是(shi)(shi)多少點,也(ye)不管是(shi)(shi)連續的還是(shi)(shi)不連續的都是(shi)(shi)取多點觸(chu)摸(mo)的中心點判斷,因為電(dian)(dian)流疊加是(shi)(shi)分不出(chu)來誰(shui)是(shi)(shi)誰(shui)的,沒有(you)辦(ban)法。
但是,目(mu)前來(lai)(lai)說,電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)觸(chu)(chu)(chu)摸(mo)(mo)屏(ping)(ping)(ping)仍然有(you)不(bu)少問題存在(zai)。武漢(han)公司信為,觸(chu)(chu)(chu)摸(mo)(mo)屏(ping)(ping)(ping)目(mu)前的(de)(de)(de)(de)(de)(de)(de)透明(ming)導電(dian)(dian)(dian)(dian)材料(liao)ITO--氧化金(jin)屬非(fei)(fei)常(chang)(chang)脆弱,觸(chu)(chu)(chu)摸(mo)(mo)幾(ji)下(xia)就會損壞,還不(bu)能(neng)(neng)直(zhi)接用(yong)來(lai)(lai)作工作層(ceng)。材料(liao)的(de)(de)(de)(de)(de)(de)(de)問題一時還難(nan)以解決(jue),只好委曲求(qiu)全:在(zai)外部增加一層(ceng)非(fei)(fei)常(chang)(chang)薄的(de)(de)(de)(de)(de)(de)(de)堅硬玻璃(li),它顯然是不(bu)能(neng)(neng)導電(dian)(dian)(dian)(dian)的(de)(de)(de)(de)(de)(de)(de),直(zhi)流(liu)(liu)是不(bu)行(xing)了(le),改用(yong)高頻交流(liu)(liu)信號,靠人的(de)(de)(de)(de)(de)(de)(de)手(shou)指頭(tou)(隔著薄玻璃(li))與(yu)工作面(mian)(mian)形成的(de)(de)(de)(de)(de)(de)(de)耦合(he)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)來(lai)(lai)吸走一個(ge)(ge)交流(liu)(liu)電(dian)(dian)(dian)(dian)流(liu)(liu),這(zhe)(zhe)就是電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)屏(ping)(ping)(ping)"電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)"名字的(de)(de)(de)(de)(de)(de)(de)由(you)來(lai)(lai)。 電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)觸(chu)(chu)(chu)摸(mo)(mo)屏(ping)(ping)(ping)之(zhi)所以出現"漂移"的(de)(de)(de)(de)(de)(de)(de)問題,是因為耦合(he)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)的(de)(de)(de)(de)(de)(de)(de)方式是不(bu)穩定(ding)(ding)的(de)(de)(de)(de)(de)(de)(de),它直(zhi)接受溫(wen)度(du)、濕度(du)、手(shou)指濕潤程度(du)、人體(ti)體(ti)重、地(di)面(mian)(mian)干(gan)(gan)燥程度(du)影(ying)(ying)響(xiang),受外界大面(mian)(mian)積(ji)物體(ti)的(de)(de)(de)(de)(de)(de)(de)干(gan)(gan)擾也(ye)非(fei)(fei)常(chang)(chang)大,帶(dai)來(lai)(lai)了(le)不(bu)穩定(ding)(ding)的(de)(de)(de)(de)(de)(de)(de)結果,這(zhe)(zhe)些都直(zhi)接違背了(le)作為觸(chu)(chu)(chu)摸(mo)(mo)屏(ping)(ping)(ping)這(zhe)(zhe)種坐標(biao)(biao)系統的(de)(de)(de)(de)(de)(de)(de)基(ji)本要求(qiu),不(bu)可避免的(de)(de)(de)(de)(de)(de)(de)要產生漂移,有(you)的(de)(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)觸(chu)(chu)(chu)摸(mo)(mo)屏(ping)(ping)(ping)欲求(qiu)通(tong)過25點(dian)校準法(fa)甚至96點(dian)校準法(fa)來(lai)(lai)解決(jue)漂移問題,其實(shi)是不(bu)可能(neng)(neng)的(de)(de)(de)(de)(de)(de)(de),漂移是電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)工作的(de)(de)(de)(de)(de)(de)(de)這(zhe)(zhe)種方式決(jue)定(ding)(ding)的(de)(de)(de)(de)(de)(de)(de),即使(shi)是在(zai)控制(zhi)器的(de)(de)(de)(de)(de)(de)(de)單(dan)片程序(xu)上利用(yong)動態計算(suan)和經驗值查表,也(ye)只能(neng)(neng)是治標(biao)(biao)不(bu)治本。 其實(shi),多點(dian)校準法(fa)最早是大屏(ping)(ping)(ping)幕投影(ying)(ying)觸(chu)(chu)(chu)摸(mo)(mo)板使(shi)用(yong)的(de)(de)(de)(de)(de)(de)(de)方法(fa),目(mu)的(de)(de)(de)(de)(de)(de)(de)是消除坐標(biao)(biao)對應的(de)(de)(de)(de)(de)(de)(de)線xing失真,電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)觸(chu)(chu)(chu)摸(mo)(mo)屏(ping)(ping)(ping)的(de)(de)(de)(de)(de)(de)(de)線xing失真也(ye)非(fei)(fei)常(chang)(chang)厲害(hai),主要是因為電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)屏(ping)(ping)(ping)的(de)(de)(de)(de)(de)(de)(de)計算(suan)建立在(zai)四(si)個(ge)(ge)電(dian)(dian)(dian)(dian)流(liu)(liu)量(liang)與(yu)觸(chu)(chu)(chu)摸(mo)(mo)點(dian)到四(si)個(ge)(ge)電(dian)(dian)(dian)(dian)極的(de)(de)(de)(de)(de)(de)(de)距離(li)成比例(li)的(de)(de)(de)(de)(de)(de)(de)理(li)想狀(zhuang)態上,實(shi)際(ji)由(you)于受環境電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)、線路寄生電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)和不(bu)同人使(shi)用(yong)的(de)(de)(de)(de)(de)(de)(de)影(ying)(ying)響(xiang)。