電(dian)(dian)容觸(chu)(chu)(chu)摸(mo)屏(ping)的(de)(de)漂(piao)移問(wen)題(ti)。在觸(chu)(chu)(chu)摸(mo)屏(ping)產品(pin)(pin)中,電(dian)(dian)容觸(chu)(chu)(chu)摸(mo)屏(ping)是我們常用的(de)(de)觸(chu)(chu)(chu)摸(mo)屏(ping)方式,那么,對(dui)于電(dian)(dian)容觸(chu)(chu)(chu)摸(mo)屏(ping)來說(shuo),其產品(pin)(pin)本身應用比(bi)較廣泛,但(dan)是也存在著(zhu)不少問(wen)題(ti)。而(er)且由于現(xian)在科(ke)技的(de)(de)發(fa)展程度(du)還(huan)無法完(wan)全解決(jue)觸(chu)(chu)(chu)摸(mo)屏(ping)產品(pin)(pin)在相關原理上出現(xian)的(de)(de)問(wen)題(ti),所以對(dui)于這些(xie)問(wen)題(ti),目前(qian)還(huan)是普遍存在的(de)(de)。
在這(zhe)里武漢(han)(han)公司要跟大(da)家討論的(de)(de)是(shi)關于電(dian)(dian)容(rong)(rong)觸摸(mo)(mo)屏(ping)(ping)(ping)的(de)(de)"漂移"問題(ti),這(zhe)個問題(ti)比(bi)較常見,也是(shi)我們在解決產品問題(ti)時(shi)主要考(kao)慮(lv)的(de)(de)方(fang)面(mian)。 電(dian)(dian)容(rong)(rong)觸摸(mo)(mo)屏(ping)(ping)(ping)的(de)(de)漂移問題(ti)介紹(shao)! 武漢(han)(han)觸摸(mo)(mo)屏(ping)(ping)(ping)公司提示,電(dian)(dian)容(rong)(rong)觸摸(mo)(mo)屏(ping)(ping)(ping)本身實際(ji)是(shi)一(yi)套精密的(de)(de)漏電(dian)(dian)傳感器,帶手(shou)套的(de)(de)手(shou)不(bu)能觸摸(mo)(mo),由于使用電(dian)(dian)容(rong)(rong)方(fang)式(shi),導致有(you)漂移現象。電(dian)(dian)容(rong)(rong)觸摸(mo)(mo)屏(ping)(ping)(ping)和電(dian)(dian)阻觸摸(mo)(mo)屏(ping)(ping)(ping)都是(shi)電(dian)(dian)原(yuan)理工作(zuo)方(fang)式(shi),電(dian)(dian)工作(zuo)方(fang)式(shi)對于多(duo)點觸摸(mo)(mo),不(bu)管是(shi)多(duo)少點,也不(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(duo)點觸摸(mo)(mo)的(de)(de)中心點判(pan)斷,因為電(dian)(dian)流疊加是(shi)分不(bu)出來誰(shui)是(shi)誰(shui)的(de)(de),沒有(you)辦法。
但(dan)是(shi)(shi)(shi),目(mu)前來(lai)(lai)說,電(dian)容(rong)(rong)(rong)(rong)(rong)(rong)觸(chu)摸(mo)(mo)屏仍然(ran)有(you)不(bu)(bu)少問(wen)題(ti)(ti)(ti)存在(zai)。武漢(han)公司信為(wei),觸(chu)摸(mo)(mo)屏目(mu)前的(de)(de)(de)(de)(de)(de)透明導電(dian)材(cai)料ITO--氧化金屬非(fei)常(chang)脆弱,觸(chu)摸(mo)(mo)幾下就會損壞,還(huan)不(bu)(bu)能直(zhi)接(jie)用(yong)來(lai)(lai)作(zuo)工(gong)作(zuo)層(ceng)。材(cai)料的(de)(de)(de)(de)(de)(de)問(wen)題(ti)(ti)(ti)一時還(huan)難以(yi)解(jie)決(jue),只好委曲求全:在(zai)外(wai)部增加一層(ceng)非(fei)常(chang)薄的(de)(de)(de)(de)(de)(de)堅硬玻璃(li),它(ta)顯然(ran)是(shi)(shi)(shi)不(bu)(bu)能導電(dian)的(de)(de)(de)(de)(de)(de),直(zhi)流(liu)是(shi)(shi)(shi)不(bu)(bu)行(xing)了,改用(yong)高頻交(jiao)流(liu)信號,靠人的(de)(de)(de)(de)(de)(de)手(shou)指(zhi)頭(隔著薄玻璃(li))與(yu)工(gong)作(zuo)面(mian)形(xing)成(cheng)的(de)(de)(de)(de)(de)(de)耦(ou)合電(dian)容(rong)(rong)(rong)(rong)(rong)(rong)來(lai)(lai)吸走(zou)一個(ge)交(jiao)流(liu)電(dian)流(liu),這(zhe)就是(shi)(shi)(shi)電(dian)容(rong)(rong)(rong)(rong)(rong)(rong)屏"電(dian)容(rong)(rong)(rong)(rong)(rong)(rong)"名(ming)字的(de)(de)(de)(de)(de)(de)由來(lai)(lai)。 電(dian)容(rong)(rong)(rong)(rong)(rong)(rong)觸(chu)摸(mo)(mo)屏之所以(yi)出現"漂移(yi)"的(de)(de)(de)(de)(de)(de)問(wen)題(ti)(ti)(ti),是(shi)(shi)(shi)因為(wei)耦(ou)合電(dian)容(rong)(rong)(rong)(rong)(rong)(rong)的(de)(de)(de)(de)(de)(de)方式是(shi)(shi)(shi)不(bu)(bu)穩(wen)定的(de)(de)(de)(de)(de)(de),它(ta)直(zhi)接(jie)受(shou)(shou)溫度(du)、濕度(du)、手(shou)指(zhi)濕潤程度(du)、人體(ti)(ti)體(ti)(ti)重、地面(mian)干燥程度(du)影響,受(shou)(shou)外(wai)界大面(mian)積物體(ti)(ti)的(de)(de)(de)(de)(de)(de)干擾也非(fei)常(chang)大,帶來(lai)(lai)了不(bu)(bu)穩(wen)定的(de)(de)(de)(de)(de)(de)結果,這(zhe)些都(dou)直(zhi)接(jie)違背了作(zuo)為(wei)觸(chu)摸(mo)(mo)屏這(zhe)種(zhong)坐標系統的(de)(de)(de)(de)(de)(de)基本要(yao)求,不(bu)(bu)可(ke)避免(mian)的(de)(de)(de)(de)(de)(de)要(yao)產(chan)生漂移(yi),有(you)的(de)(de)(de)(de)(de)(de)電(dian)容(rong)(rong)(rong)(rong)(rong)(rong)觸(chu)摸(mo)(mo)屏欲(yu)求通過25點校準(zhun)法甚至96點校準(zhun)法來(lai)(lai)解(jie)決(jue)漂移(yi)問(wen)題(ti)(ti)(ti),其實(shi)是(shi)(shi)(shi)不(bu)(bu)可(ke)能的(de)(de)(de)(de)(de)(de),漂移(yi)是(shi)(shi)(shi)電(dian)容(rong)(rong)(rong)(rong)(rong)(rong)工(gong)作(zuo)的(de)(de)(de)(de)(de)(de)這(zhe)種(zhong)方式決(jue)定的(de)(de)(de)(de)(de)(de),即使是(shi)(shi)(shi)在(zai)控制器的(de)(de)(de)(de)(de)(de)單片(pian)程序上利用(yong)動(dong)態(tai)計(ji)算和經驗值查表,也只能是(shi)(shi)(shi)治標不(bu)(bu)治本。 其實(shi),多(duo)點校準(zhun)法最(zui)早是(shi)(shi)(shi)大屏幕投影觸(chu)摸(mo)(mo)板使用(yong)的(de)(de)(de)(de)(de)(de)方法,目(mu)的(de)(de)(de)(de)(de)(de)是(shi)(shi)(shi)消除坐標對應的(de)(de)(de)(de)(de)(de)線(xian)(xian)xing失真(zhen),電(dian)容(rong)(rong)(rong)(rong)(rong)(rong)觸(chu)摸(mo)(mo)屏的(de)(de)(de)(de)(de)(de)線(xian)(xian)xing失真(zhen)也非(fei)常(chang)厲害(hai),主要(yao)是(shi)(shi)(shi)因為(wei)電(dian)容(rong)(rong)(rong)(rong)(rong)(rong)屏的(de)(de)(de)(de)(de)(de)計(ji)算建立在(zai)四(si)個(ge)電(dian)流(liu)量與(yu)觸(chu)摸(mo)(mo)點到四(si)個(ge)電(dian)極的(de)(de)(de)(de)(de)(de)距離成(cheng)比例的(de)(de)(de)(de)(de)(de)理(li)想(xiang)狀(zhuang)態(tai)上,實(shi)際由于受(shou)(shou)環(huan)境電(dian)容(rong)(rong)(rong)(rong)(rong)(rong)、線(xian)(xian)路寄(ji)生電(dian)容(rong)(rong)(rong)(rong)(rong)(rong)和不(bu)(bu)同人使用(yong)的(de)(de)(de)(de)(de)(de)影響。