電(dian)容觸(chu)摸(mo)屏(ping)的(de)(de)漂移問(wen)(wen)題。在(zai)(zai)觸(chu)摸(mo)屏(ping)產(chan)(chan)品中,電(dian)容觸(chu)摸(mo)屏(ping)是(shi)(shi)我們(men)常用(yong)的(de)(de)觸(chu)摸(mo)屏(ping)方式,那(nei)么,對(dui)于(yu)電(dian)容觸(chu)摸(mo)屏(ping)來說,其(qi)產(chan)(chan)品本身(shen)應(ying)用(yong)比較廣泛,但是(shi)(shi)也存在(zai)(zai)著不(bu)少問(wen)(wen)題。而且由于(yu)現(xian)在(zai)(zai)科技(ji)的(de)(de)發展程度(du)還無法完全解決觸(chu)摸(mo)屏(ping)產(chan)(chan)品在(zai)(zai)相關原理上出現(xian)的(de)(de)問(wen)(wen)題,所以對(dui)于(yu)這些問(wen)(wen)題,目前還是(shi)(shi)普遍存在(zai)(zai)的(de)(de)。
在這里武(wu)(wu)漢(han)公(gong)司(si)要(yao)(yao)跟大家討論(lun)的(de)是關于電容(rong)觸(chu)(chu)摸屏的(de)"漂(piao)移(yi)(yi)"問題(ti),這個問題(ti)比較常見,也是我們在解決產品問題(ti)時主要(yao)(yao)考慮的(de)方(fang)面。 電容(rong)觸(chu)(chu)摸屏的(de)漂(piao)移(yi)(yi)問題(ti)介紹(shao)! 武(wu)(wu)漢(han)觸(chu)(chu)摸屏公(gong)司(si)提示,電容(rong)觸(chu)(chu)摸屏本身實(shi)際(ji)是一套精(jing)密的(de)漏電傳(chuan)感器,帶手(shou)套的(de)手(shou)不(bu)(bu)能(neng)觸(chu)(chu)摸,由于使用(yong)電容(rong)方(fang)式,導(dao)致有(you)漂(piao)移(yi)(yi)現(xian)象。電容(rong)觸(chu)(chu)摸屏和電阻觸(chu)(chu)摸屏都是電原理工(gong)作方(fang)式,電工(gong)作方(fang)式對于多點觸(chu)(chu)摸,不(bu)(bu)管(guan)是多少點,也不(bu)(bu)管(guan)是連續(xu)的(de)還是不(bu)(bu)連續(xu)的(de)都是取多點觸(chu)(chu)摸的(de)中心點判斷,因為(wei)電流(liu)疊加是分不(bu)(bu)出來誰(shui)是誰(shui)的(de),沒有(you)辦法。
但是(shi)(shi)(shi),目(mu)前來(lai)(lai)說,電(dian)(dian)(dian)(dian)(dian)容觸(chu)(chu)摸(mo)屏(ping)(ping)仍然有不(bu)(bu)(bu)少問題(ti)存(cun)在。武漢公(gong)司信(xin)為(wei),觸(chu)(chu)摸(mo)屏(ping)(ping)目(mu)前的(de)(de)(de)(de)(de)(de)(de)(de)(de)透明導電(dian)(dian)(dian)(dian)(dian)材料(liao)ITO--氧化金屬非常脆弱,觸(chu)(chu)摸(mo)幾下(xia)就會(hui)損(sun)壞,還(huan)不(bu)(bu)(bu)能(neng)直(zhi)(zhi)接(jie)用來(lai)(lai)作(zuo)(zuo)(zuo)工(gong)(gong)作(zuo)(zuo)(zuo)層(ceng)。材料(liao)的(de)(de)(de)(de)(de)(de)(de)(de)(de)問題(ti)一時還(huan)難以(yi)解決,只好委曲求全:在外部增加一層(ceng)非常薄的(de)(de)(de)(de)(de)(de)(de)(de)(de)堅(jian)硬(ying)玻璃,它(ta)顯(xian)然是(shi)(shi)(shi)不(bu)(bu)(bu)能(neng)導電(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)(de)(de)(de)(de)(de)(de),直(zhi)(zhi)流(liu)是(shi)(shi)(shi)不(bu)(bu)(bu)行了(le),改用高頻交流(liu)信(xin)號,靠人的(de)(de)(de)(de)(de)(de)(de)(de)(de)手(shou)指頭(隔著(zhu)薄玻璃)與工(gong)(gong)作(zuo)(zuo)(zuo)面形(xing)成的(de)(de)(de)(de)(de)(de)(de)(de)(de)耦合電(dian)(dian)(dian)(dian)(dian)容來(lai)(lai)吸走(zou)一個(ge)交流(liu)電(dian)(dian)(dian)(dian)(dian)流(liu),這就是(shi)(shi)(shi)電(dian)(dian)(dian)(dian)(dian)容屏(ping)(ping)"電(dian)(dian)(dian)(dian)(dian)容"名字的(de)(de)(de)(de)(de)(de)(de)(de)(de)由來(lai)(lai)。 電(dian)(dian)(dian)(dian)(dian)容觸(chu)(chu)摸(mo)屏(ping)(ping)之所以(yi)出現"漂(piao)移(yi)"的(de)(de)(de)(de)(de)(de)(de)(de)(de)問題(ti),是(shi)(shi)(shi)因為(wei)耦合電(dian)(dian)(dian)(dian)(dian)容的(de)(de)(de)(de)(de)(de)(de)(de)(de)方(fang)(fang)式(shi)是(shi)(shi)(shi)不(bu)(bu)(bu)穩定(ding)的(de)(de)(de)(de)(de)(de)(de)(de)(de),它(ta)直(zhi)(zhi)接(jie)受溫度(du)、濕度(du)、手(shou)指濕潤程度(du)、人體體重、地面干燥程度(du)影(ying)響(xiang),受外界大(da)面積物(wu)體的(de)(de)(de)(de)(de)(de)(de)(de)(de)干擾也非常大(da),帶來(lai)(lai)了(le)不(bu)(bu)(bu)穩定(ding)的(de)(de)(de)(de)(de)(de)(de)(de)(de)結(jie)果(guo),這些(xie)都直(zhi)(zhi)接(jie)違背了(le)作(zuo)(zuo)(zuo)為(wei)觸(chu)(chu)摸(mo)屏(ping)(ping)這種坐標系統的(de)(de)(de)(de)(de)(de)(de)(de)(de)基本要(yao)求,不(bu)(bu)(bu)可(ke)(ke)避免的(de)(de)(de)(de)(de)(de)(de)(de)(de)要(yao)產生(sheng)漂(piao)移(yi),有的(de)(de)(de)(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)容觸(chu)(chu)摸(mo)屏(ping)(ping)欲求通過25點(dian)(dian)校(xiao)(xiao)準法(fa)甚至(zhi)96點(dian)(dian)校(xiao)(xiao)準法(fa)來(lai)(lai)解決漂(piao)移(yi)問題(ti),其(qi)實是(shi)(shi)(shi)不(bu)(bu)(bu)可(ke)(ke)能(neng)的(de)(de)(de)(de)(de)(de)(de)(de)(de),漂(piao)移(yi)是(shi)(shi)(shi)電(dian)(dian)(dian)(dian)(dian)容工(gong)(gong)作(zuo)(zuo)(zuo)的(de)(de)(de)(de)(de)(de)(de)(de)(de)這種方(fang)(fang)式(shi)決定(ding)的(de)(de)(de)(de)(de)(de)(de)(de)(de),即使(shi)是(shi)(shi)(shi)在控制器的(de)(de)(de)(de)(de)(de)(de)(de)(de)單片程序(xu)上(shang)利用動態計(ji)算(suan)和(he)經驗值查表,也只能(neng)是(shi)(shi)(shi)治標不(bu)(bu)(bu)治本。 其(qi)實,多點(dian)(dian)校(xiao)(xiao)準法(fa)最早(zao)是(shi)(shi)(shi)大(da)屏(ping)(ping)幕投影(ying)觸(chu)(chu)摸(mo)板使(shi)用的(de)(de)(de)(de)(de)(de)(de)(de)(de)方(fang)(fang)法(fa),目(mu)的(de)(de)(de)(de)(de)(de)(de)(de)(de)是(shi)(shi)(shi)消(xiao)除坐標對應的(de)(de)(de)(de)(de)(de)(de)(de)(de)線(xian)(xian)xing失(shi)真,電(dian)(dian)(dian)(dian)(dian)容觸(chu)(chu)摸(mo)屏(ping)(ping)的(de)(de)(de)(de)(de)(de)(de)(de)(de)線(xian)(xian)xing失(shi)真也非常厲害,主要(yao)是(shi)(shi)(shi)因為(wei)電(dian)(dian)(dian)(dian)(dian)容屏(ping)(ping)的(de)(de)(de)(de)(de)(de)(de)(de)(de)計(ji)算(suan)建立(li)在四個(ge)電(dian)(dian)(dian)(dian)(dian)流(liu)量(liang)與觸(chu)(chu)摸(mo)點(dian)(dian)到四個(ge)電(dian)(dian)(dian)(dian)(dian)極(ji)的(de)(de)(de)(de)(de)(de)(de)(de)(de)距離成比(bi)例的(de)(de)(de)(de)(de)(de)(de)(de)(de)理想(xiang)狀態上(shang),實際由于受環境電(dian)(dian)(dian)(dian)(dian)容、線(xian)(xian)路寄生(sheng)電(dian)(dian)(dian)(dian)(dian)容和(he)不(bu)(bu)(bu)同人使(shi)用的(de)(de)(de)(de)(de)(de)(de)(de)(de)影(ying)響(xiang)。