電容(rong)觸(chu)(chu)摸(mo)屏(ping)的漂移(yi)問(wen)題。在(zai)觸(chu)(chu)摸(mo)屏(ping)產品中(zhong)，電容(rong)觸(chu)(chu)摸(mo)屏(ping)是我們(men)常用(yong)的觸(chu)(chu)摸(mo)屏(ping)方(fang)式，那么，對于電容(rong)觸(chu)(chu)摸(mo)屏(ping)來說(shuo)，其(qi)產品本身應用(yong)比較廣泛，但是也存(cun)在(zai)著(zhu)不少問(wen)題。而且由于現在(zai)科技的發展程度(du)還(huan)無法完(wan)全解決(jue)觸(chu)(chu)摸(mo)屏(ping)產品在(zai)相關原理(li)上出現的問(wen)題，所以對于這些問(wen)題，目(mu)前還(huan)是普遍存(cun)在(zai)的。
在這里武(wu)漢(han)(han)公司(si)要跟大家討論的(de)是(shi)關(guan)于電(dian)(dian)容觸(chu)(chu)摸(mo)(mo)屏(ping)(ping)的(de)"漂移"問(wen)題，這個(ge)問(wen)題比較常見，也(ye)是(shi)我們(men)在解(jie)決產品問(wen)題時主要考慮的(de)方(fang)面。 電(dian)(dian)容觸(chu)(chu)摸(mo)(mo)屏(ping)(ping)的(de)漂移問(wen)題介紹！ 武(wu)漢(han)(han)觸(chu)(chu)摸(mo)(mo)屏(ping)(ping)公司(si)提示(shi)，電(dian)(dian)容觸(chu)(chu)摸(mo)(mo)屏(ping)(ping)本(ben)身實際是(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)容方(fang)式(shi)，導(dao)致有漂移現象。電(dian)(dian)容觸(chu)(chu)摸(mo)(mo)屏(ping)(ping)和(he)電(dian)(dian)阻觸(chu)(chu)摸(mo)(mo)屏(ping)(ping)都是(shi)電(dian)(dian)原理工(gong)作方(fang)式(shi)，電(dian)(dian)工(gong)作方(fang)式(shi)對于多(duo)點(dian)觸(chu)(chu)摸(mo)(mo)，不(bu)管是(shi)多(duo)少點(dian)，也(ye)不(bu)管是(shi)連續(xu)的(de)還是(shi)不(bu)連續(xu)的(de)都是(shi)取多(duo)點(dian)觸(chu)(chu)摸(mo)(mo)的(de)中(zhong)心點(dian)判斷，因為(wei)電(dian)(dian)流疊加是(shi)分不(bu)出來(lai)誰(shui)是(shi)誰(shui)的(de)，沒有辦法。
但是(shi)(shi)(shi)，目(mu)前來(lai)(lai)說，電(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)觸(chu)摸屏(ping)(ping)(ping)仍然有不(bu)(bu)(bu)少問(wen)題(ti)存(cun)在。武漢公司信(xin)為(wei)，觸(chu)摸屏(ping)(ping)(ping)目(mu)前的(de)(de)(de)(de)(de)(de)(de)透明導(dao)電(dian)(dian)材料ITO--氧化金(jin)屬非(fei)(fei)常(chang)脆(cui)弱，觸(chu)摸幾下就會損(sun)壞，還不(bu)(bu)(bu)能(neng)直接(jie)用(yong)來(lai)(lai)作(zuo)工作(zuo)層。材料的(de)(de)(de)(de)(de)(de)(de)問(wen)題(ti)一時(shi)還難以解決，只(zhi)好(hao)委(wei)曲求全：在外部增加一層非(fei)(fei)常(chang)薄的(de)(de)(de)(de)(de)(de)(de)堅(jian)硬玻璃(li)，它顯然是(shi)(shi)(shi)不(bu)(bu)(bu)能(neng)導(dao)電(dian)(dian)的(de)(de)(de)(de)(de)(de)(de)，直流(liu)(liu)是(shi)(shi)(shi)不(bu)(bu)(bu)行了，改用(yong)高(gao)頻交流(liu)(liu)信(xin)號，靠人(ren)的(de)(de)(de)(de)(de)(de)(de)手(shou)指頭(tou)（隔著薄玻璃(li)）與工作(zuo)面(mian)形(xing)成的(de)(de)(de)(de)(de)(de)(de)耦合電(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)來(lai)(lai)吸走一個(ge)交流(liu)(liu)電(dian)(dian)流(liu)(liu)，這就是(shi)(shi)(shi)電(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)屏(ping)(ping)(ping)"電(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)"名字的(de)(de)(de)(de)(de)(de)(de)由來(lai)(lai)。 電(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)觸(chu)摸屏(ping)(ping)(ping)之所以出現"漂移"的(de)(de)(de)(de)(de)(de)(de)問(wen)題(ti)，是(shi)(shi)(shi)因為(wei)耦合電(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)的(de)(de)(de)(de)(de)(de)(de)方式是(shi)(shi)(shi)不(bu)(bu)(bu)穩(wen)定(ding)的(de)(de)(de)(de)(de)(de)(de)，它直接(jie)受(shou)(shou)(shou)溫度(du)、濕(shi)度(du)、手(shou)指濕(shi)潤程(cheng)度(du)、人(ren)體(ti)體(ti)重、地面(mian)干(gan)燥程(cheng)度(du)影響，受(shou)(shou)(shou)外界(jie)大(da)(da)面(mian)積(ji)物體(ti)的(de)(de)(de)(de)(de)(de)(de)干(gan)擾(rao)也非(fei)(fei)常(chang)大(da)(da)，帶(dai)來(lai)(lai)了不(bu)(bu)(bu)穩(wen)定(ding)的(de)(de)(de)(de)(de)(de)(de)結(jie)果(guo)，這些都(dou)直接(jie)違(wei)背了作(zuo)為(wei)觸(chu)摸屏(ping)(ping)(ping)這種坐標(biao)系統(tong)的(de)(de)(de)(de)(de)(de)(de)基本要(yao)求，不(bu)(bu)(bu)可避免的(de)(de)(de)(de)(de)(de)(de)要(yao)產生(sheng)漂移，有的(de)(de)(de)(de)(de)(de)(de)電(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)觸(chu)摸屏(ping)(ping)(ping)欲求通過(guo)25點(dian)(dian)校(xiao)準法(fa)甚(shen)至96點(dian)(dian)校(xiao)準法(fa)來(lai)(lai)解決漂移問(wen)題(ti)，其實(shi)是(shi)(shi)(shi)不(bu)(bu)(bu)可能(neng)的(de)(de)(de)(de)(de)(de)(de)，漂移是(shi)(shi)(shi)電(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)工作(zuo)的(de)(de)(de)(de)(de)(de)(de)這種方式決定(ding)的(de)(de)(de)(de)(de)(de)(de)，即使是(shi)(shi)(shi)在控制器的(de)(de)(de)(de)(de)(de)(de)單片(pian)程(cheng)序(xu)上(shang)利(li)用(yong)動態(tai)計(ji)算和經驗值查表，也只(zhi)能(neng)是(shi)(shi)(shi)治(zhi)(zhi)標(biao)不(bu)(bu)(bu)治(zhi)(zhi)本。 其實(shi)，多點(dian)(dian)校(xiao)準法(fa)最(zui)早是(shi)(shi)(shi)大(da)(da)屏(ping)(ping)(ping)幕(mu)投影觸(chu)摸板使用(yong)的(de)(de)(de)(de)(de)(de)(de)方法(fa)，目(mu)的(de)(de)(de)(de)(de)(de)(de)是(shi)(shi)(shi)消除坐標(biao)對應的(de)(de)(de)(de)(de)(de)(de)線xing失(shi)真，電(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)觸(chu)摸屏(ping)(ping)(ping)的(de)(de)(de)(de)(de)(de)(de)線xing失(shi)真也非(fei)(fei)常(chang)厲害，主要(yao)是(shi)(shi)(shi)因為(wei)電(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)屏(ping)(ping)(ping)的(de)(de)(de)(de)(de)(de)(de)計(ji)算建立在四(si)個(ge)電(dian)(dian)流(liu)(liu)量與觸(chu)摸點(dian)(dian)到四(si)個(ge)電(dian)(dian)極的(de)(de)(de)(de)(de)(de)(de)距離成比(bi)例(li)的(de)(de)(de)(de)(de)(de)(de)理想狀態(tai)上(shang)，實(shi)際由于受(shou)(shou)(shou)環境電(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)、線路(lu)寄生(sheng)電(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)和不(bu)(bu)(bu)同人(ren)使用(yong)的(de)(de)(de)(de)(de)(de)(de)影響。
