電容觸摸(mo)屏(ping)的(de)漂移問(wen)題。在(zai)觸摸(mo)屏(ping)產(chan)品(pin)中(zhong),電容觸摸(mo)屏(ping)是(shi)我們常用的(de)觸摸(mo)屏(ping)方式,那么(me),對(dui)于電容觸摸(mo)屏(ping)來說,其產(chan)品(pin)本身應用比較(jiao)廣泛(fan),但是(shi)也存在(zai)著不少問(wen)題。而且由于現(xian)在(zai)科技的(de)發展程(cheng)度還(huan)(huan)無法完全解決觸摸(mo)屏(ping)產(chan)品(pin)在(zai)相關(guan)原理上出現(xian)的(de)問(wen)題,所以(yi)對(dui)于這些(xie)問(wen)題,目(mu)前還(huan)(huan)是(shi)普遍存在(zai)的(de)。
在(zai)這里(li)武(wu)漢公(gong)司要跟大(da)家討(tao)論的(de)(de)(de)是(shi)(shi)關于(yu)電(dian)(dian)(dian)(dian)容(rong)觸(chu)(chu)摸(mo)屏的(de)(de)(de)"漂移"問題(ti),這個問題(ti)比較常見,也是(shi)(shi)我們(men)在(zai)解(jie)決產品問題(ti)時主要考慮的(de)(de)(de)方(fang)面。 電(dian)(dian)(dian)(dian)容(rong)觸(chu)(chu)摸(mo)屏的(de)(de)(de)漂移問題(ti)介紹! 武(wu)漢觸(chu)(chu)摸(mo)屏公(gong)司提示,電(dian)(dian)(dian)(dian)容(rong)觸(chu)(chu)摸(mo)屏本身(shen)實際(ji)是(shi)(shi)一套精密的(de)(de)(de)漏(lou)電(dian)(dian)(dian)(dian)傳感器,帶手(shou)套的(de)(de)(de)手(shou)不(bu)能觸(chu)(chu)摸(mo),由于(yu)使用電(dian)(dian)(dian)(dian)容(rong)方(fang)式(shi),導致有漂移現象(xiang)。電(dian)(dian)(dian)(dian)容(rong)觸(chu)(chu)摸(mo)屏和電(dian)(dian)(dian)(dian)阻觸(chu)(chu)摸(mo)屏都是(shi)(shi)電(dian)(dian)(dian)(dian)原理工作(zuo)方(fang)式(shi),電(dian)(dian)(dian)(dian)工作(zuo)方(fang)式(shi)對于(yu)多點(dian)觸(chu)(chu)摸(mo),不(bu)管是(shi)(shi)多少點(dian),也不(bu)管是(shi)(shi)連續的(de)(de)(de)還是(shi)(shi)不(bu)連續的(de)(de)(de)都是(shi)(shi)取多點(dian)觸(chu)(chu)摸(mo)的(de)(de)(de)中(zhong)心點(dian)判斷,因(yin)為電(dian)(dian)(dian)(dian)流(liu)疊加(jia)是(shi)(shi)分不(bu)出來誰(shui)是(shi)(shi)誰(shui)的(de)(de)(de),沒有辦法。
但是(shi)(shi)(shi),目(mu)前(qian)來(lai)(lai)(lai)(lai)說,電(dian)(dian)容(rong)(rong)(rong)觸(chu)(chu)(chu)(chu)摸(mo)(mo)屏仍然有不(bu)(bu)(bu)少問(wen)題(ti)存在。武漢公司信為,觸(chu)(chu)(chu)(chu)摸(mo)(mo)屏目(mu)前(qian)的(de)(de)(de)(de)(de)(de)透明導電(dian)(dian)材料ITO--氧(yang)化金屬非(fei)常(chang)脆弱,觸(chu)(chu)(chu)(chu)摸(mo)(mo)幾(ji)下就會損(sun)壞,還不(bu)(bu)(bu)能(neng)直接(jie)用(yong)來(lai)(lai)(lai)(lai)作(zuo)(zuo)工(gong)(gong)作(zuo)(zuo)層。材料的(de)(de)(de)(de)(de)(de)問(wen)題(ti)一時還難以(yi)解決,只好委曲求(qiu)全:在外部增(zeng)加一層非(fei)常(chang)薄的(de)(de)(de)(de)(de)(de)堅(jian)硬玻(bo)璃(li),它(ta)顯然是(shi)(shi)(shi)不(bu)(bu)(bu)能(neng)導電(dian)(dian)的(de)(de)(de)(de)(de)(de),直流(liu)是(shi)(shi)(shi)不(bu)(bu)(bu)行了,改用(yong)高頻交流(liu)信號,靠(kao)人的(de)(de)(de)(de)(de)(de)手指頭(隔(ge)著(zhu)薄玻(bo)璃(li))與工(gong)(gong)作(zuo)(zuo)面形成(cheng)的(de)(de)(de)(de)(de)(de)耦合(he)電(dian)(dian)容(rong)(rong)(rong)來(lai)(lai)(lai)(lai)吸(xi)走(zou)一個交流(liu)電(dian)(dian)流(liu),這(zhe)就是(shi)(shi)(shi)電(dian)(dian)容(rong)(rong)(rong)屏"電(dian)(dian)容(rong)(rong)(rong)"名字的(de)(de)(de)(de)(de)(de)由來(lai)(lai)(lai)(lai)。 電(dian)(dian)容(rong)(rong)(rong)觸(chu)(chu)(chu)(chu)摸(mo)(mo)屏之(zhi)所以(yi)出現"漂(piao)移(yi)"的(de)(de)(de)(de)(de)(de)問(wen)題(ti),是(shi)(shi)(shi)因(yin)為耦合(he)電(dian)(dian)容(rong)(rong)(rong)的(de)(de)(de)(de)(de)(de)方式是(shi)(shi)(shi)不(bu)(bu)(bu)穩(wen)(wen)定的(de)(de)(de)(de)(de)(de),它(ta)直接(jie)受溫度(du)(du)、濕度(du)(du)、手指濕潤程度(du)(du)、人體(ti)體(ti)重、地面干(gan)燥(zao)程度(du)(du)影(ying)響,受外界大面積物體(ti)的(de)(de)(de)(de)(de)(de)干(gan)擾也(ye)非(fei)常(chang)大,帶來(lai)(lai)(lai)(lai)了不(bu)(bu)(bu)穩(wen)(wen)定的(de)(de)(de)(de)(de)(de)結果,這(zhe)些都直接(jie)違背了作(zuo)(zuo)為觸(chu)(chu)(chu)(chu)摸(mo)(mo)屏這(zhe)種(zhong)坐標(biao)系(xi)統的(de)(de)(de)(de)(de)(de)基(ji)本要(yao)求(qiu),不(bu)(bu)(bu)可避免的(de)(de)(de)(de)(de)(de)要(yao)產(chan)生(sheng)漂(piao)移(yi),有的(de)(de)(de)(de)(de)(de)電(dian)(dian)容(rong)(rong)(rong)觸(chu)(chu)(chu)(chu)摸(mo)(mo)屏欲求(qiu)通過(guo)25點(dian)校準(zhun)(zhun)法甚(shen)至96點(dian)校準(zhun)(zhun)法來(lai)(lai)(lai)(lai)解決漂(piao)移(yi)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),漂(piao)移(yi)是(shi)(shi)(shi)電(dian)(dian)容(rong)(rong)(rong)工(gong)(gong)作(zuo)(zuo)的(de)(de)(de)(de)(de)(de)這(zhe)種(zhong)方式決定的(de)(de)(de)(de)(de)(de),即使是(shi)(shi)(shi)在控制(zhi)器的(de)(de)(de)(de)(de)(de)單片程序(xu)上(shang)利(li)用(yong)動態計算(suan)和經驗(yan)值查表,也(ye)只能(neng)是(shi)(shi)(shi)治標(biao)不(bu)(bu)(bu)治本。 其實(shi),多點(dian)校準(zhun)(zhun)法最(zui)早是(shi)(shi)(shi)大屏幕投影(ying)觸(chu)(chu)(chu)(chu)摸(mo)(mo)板(ban)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(chu)坐標(biao)對(dui)應的(de)(de)(de)(de)(de)(de)線xing失真,電(dian)(dian)容(rong)(rong)(rong)觸(chu)(chu)(chu)(chu)摸(mo)(mo)屏的(de)(de)(de)(de)(de)(de)線xing失真也(ye)非(fei)常(chang)厲害,主要(yao)是(shi)(shi)(shi)因(yin)為電(dian)(dian)容(rong)(rong)(rong)屏的(de)(de)(de)(de)(de)(de)計算(suan)建立在四(si)個電(dian)(dian)流(liu)量與觸(chu)(chu)(chu)(chu)摸(mo)(mo)點(dian)到四(si)個電(dian)(dian)極的(de)(de)(de)(de)(de)(de)距離成(cheng)比(bi)例(li)的(de)(de)(de)(de)(de)(de)理想(xiang)狀態上(shang),實(shi)際由于(yu)受環境電(dian)(dian)容(rong)(rong)(rong)、線路寄生(sheng)電(dian)(dian)容(rong)(rong)(rong)和不(bu)(bu)(bu)同(tong)人使用(yong)的(de)(de)(de)(de)(de)(de)影(ying)響。