電容(rong)觸摸屏(ping)(ping)的(de)漂移問題(ti)。在觸摸屏(ping)(ping)產品(pin)(pin)中，電容(rong)觸摸屏(ping)(ping)是我們常用的(de)觸摸屏(ping)(ping)方式，那么，對于(yu)電容(rong)觸摸屏(ping)(ping)來(lai)說，其產品(pin)(pin)本身應用比較廣泛，但是也存(cun)在著不少問題(ti)。而且由于(yu)現在科技的(de)發展程度還(huan)無法完全解決觸摸屏(ping)(ping)產品(pin)(pin)在相關原理(li)上出現的(de)問題(ti)，所以對于(yu)這些問題(ti)，目前還(huan)是普(pu)遍存(cun)在的(de)。
在這里武(wu)漢公司要跟(gen)大(da)家(jia)討論的(de)(de)(de)(de)是(shi)(shi)關于電(dian)(dian)(dian)容(rong)(rong)觸(chu)(chu)摸(mo)屏的(de)(de)(de)(de)"漂移"問題(ti)，這個(ge)問題(ti)比較常見，也(ye)是(shi)(shi)我們在解決產品問題(ti)時主要考慮(lv)的(de)(de)(de)(de)方(fang)面。 電(dian)(dian)(dian)容(rong)(rong)觸(chu)(chu)摸(mo)屏的(de)(de)(de)(de)漂移問題(ti)介紹！ 武(wu)漢觸(chu)(chu)摸(mo)屏公司提示，電(dian)(dian)(dian)容(rong)(rong)觸(chu)(chu)摸(mo)屏本身實際是(shi)(shi)一套(tao)精密的(de)(de)(de)(de)漏(lou)電(dian)(dian)(dian)傳感器，帶手套(tao)的(de)(de)(de)(de)手不(bu)能觸(chu)(chu)摸(mo)，由于使用電(dian)(dian)(dian)容(rong)(rong)方(fang)式(shi)，導致有漂移現象。電(dian)(dian)(dian)容(rong)(rong)觸(chu)(chu)摸(mo)屏和電(dian)(dian)(dian)阻(zu)觸(chu)(chu)摸(mo)屏都(dou)是(shi)(shi)電(dian)(dian)(dian)原理工作方(fang)式(shi)，電(dian)(dian)(dian)工作方(fang)式(shi)對于多點觸(chu)(chu)摸(mo)，不(bu)管(guan)是(shi)(shi)多少(shao)點，也(ye)不(bu)管(guan)是(shi)(shi)連續的(de)(de)(de)(de)還是(shi)(shi)不(bu)連續的(de)(de)(de)(de)都(dou)是(shi)(shi)取多點觸(chu)(chu)摸(mo)的(de)(de)(de)(de)中(zhong)心點判斷，因為電(dian)(dian)(dian)流疊加(jia)是(shi)(shi)分不(bu)出來誰是(shi)(shi)誰的(de)(de)(de)(de)，沒有辦法。
但是(shi)，目(mu)前(qian)來(lai)(lai)說，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)觸(chu)摸(mo)(mo)屏仍然有不(bu)少問(wen)題存(cun)在。武漢公司信為，觸(chu)摸(mo)(mo)屏目(mu)前(qian)的(de)(de)(de)(de)(de)(de)(de)(de)透明(ming)導(dao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)材料ITO--氧(yang)化金屬非常脆弱，觸(chu)摸(mo)(mo)幾(ji)下(xia)就(jiu)會損壞，還(huan)不(bu)能(neng)直(zhi)接(jie)(jie)用來(lai)(lai)作(zuo)(zuo)(zuo)工作(zuo)(zuo)(zuo)層。材料的(de)(de)(de)(de)(de)(de)(de)(de)問(wen)題一時還(huan)難以解(jie)決，只好(hao)委曲求全：在外部增加一層非常薄的(de)(de)(de)(de)(de)(de)(de)(de)堅硬玻璃，它顯然是(shi)不(bu)能(neng)導(dao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)(de)(de)(de)(de)(de)，直(zhi)流(liu)是(shi)不(bu)行(xing)了，改用高(gao)頻交流(liu)信號，靠人(ren)的(de)(de)(de)(de)(de)(de)(de)(de)手(shou)指(zhi)(zhi)頭（隔著(zhu)薄玻璃）與工作(zuo)(zuo)(zuo)面(mian)(mian)(mian)形成(cheng)的(de)(de)(de)(de)(de)(de)(de)(de)耦合電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)來(lai)(lai)吸走一個交流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)，這(zhe)就(jiu)是(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)屏"電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)"名字的(de)(de)(de)(de)(de)(de)(de)(de)由來(lai)(lai)。 電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)觸(chu)摸(mo)(mo)屏之(zhi)所以出現"漂移"的(de)(de)(de)(de)(de)(de)(de)(de)問(wen)題，是(shi)因為耦合電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)的(de)(de)(de)(de)(de)(de)(de)(de)方式是(shi)不(bu)穩定(ding)的(de)(de)(de)(de)(de)(de)(de)(de)，它直(zhi)接(jie)(jie)受溫度、濕(shi)度、手(shou)指(zhi)(zhi)濕(shi)潤(run)程(cheng)度、人(ren)體(ti)體(ti)重(zhong)、地面(mian)(mian)(mian)干燥(zao)程(cheng)度影響，受外界大面(mian)(mian)(mian)積(ji)物體(ti)的(de)(de)(de)(de)(de)(de)(de)(de)干擾也非常大，帶來(lai)(lai)了不(bu)穩定(ding)的(de)(de)(de)(de)(de)(de)(de)(de)結果，這(zhe)些都直(zhi)接(jie)(jie)違(wei)背(bei)了作(zuo)(zuo)(zuo)為觸(chu)摸(mo)(mo)屏這(zhe)種坐標系統的(de)(de)(de)(de)(de)(de)(de)(de)基本要求，不(bu)可(ke)避免的(de)(de)(de)(de)(de)(de)(de)(de)要產生漂移，有的(de)(de)(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)觸(chu)摸(mo)(mo)屏欲(yu)求通過25點(dian)校準法甚至96點(dian)校準法來(lai)(lai)解(jie)決漂移問(wen)題，其實是(shi)不(bu)可(ke)能(neng)的(de)(de)(de)(de)(de)(de)(de)(de)，漂移是(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)工作(zuo)(zuo)(zuo)的(de)(de)(de)(de)(de)(de)(de)(de)這(zhe)種方式決定(ding)的(de)(de)(de)(de)(de)(de)(de)(de)，即(ji)使是(shi)在控制器的(de)(de)(de)(de)(de)(de)(de)(de)單片(pian)程(cheng)序上利(li)用動態計算和經驗值查表，也只能(neng)是(shi)治標不(bu)治本。 其實，多點(dian)校準法最早(zao)是(shi)大屏幕投影觸(chu)摸(mo)(mo)板使用的(de)(de)(de)(de)(de)(de)(de)(de)方法，目(mu)的(de)(de)(de)(de)(de)(de)(de)(de)是(shi)消除坐標對應的(de)(de)(de)(de)(de)(de)(de)(de)線xing失真，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)觸(chu)摸(mo)(mo)屏的(de)(de)(de)(de)(de)(de)(de)(de)線xing失真也非常厲害(hai)，主要是(shi)因為電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)屏的(de)(de)(de)(de)(de)(de)(de)(de)計算建立在四個電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)量與觸(chu)摸(mo)(mo)點(dian)到四個電(dian)(dian)(dian)(dian)(dian)(dian)(dian)極的(de)(de)(de)(de)(de)(de)(de)(de)距離(li)成(cheng)比(bi)例的(de)(de)(de)(de)(de)(de)(de)(de)理想狀態上，實際由于受環境電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)、線路寄生電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)和不(bu)同人(ren)使用的(de)(de)(de)(de)(de)(de)(de)(de)影響。
