觸控筆的原理是什么

觸(chu)控(kong)(kong)(kong)(kong)筆(bi)的(de)原(yuan)(yuan)理與觸(chu)摸(mo)(mo)屏技術(shu)差不多，目前，市場(chang)上各種觸(chu)控(kong)(kong)(kong)(kong)筆(bi)大(da)概可歸為電(dian)(dian)阻式觸(chu)控(kong)(kong)(kong)(kong)筆(bi)和(he)電(dian)(dian)容(rong)式觸(chu)控(kong)(kong)(kong)(kong)筆(bi)這兩種類型(xing)，它們(men)分(fen)別適用于(yu)電(dian)(dian)阻式和(he)電(dian)(dian)容(rong)式觸(chu)摸(mo)(mo)屏終端。電(dian)(dian)阻觸(chu)摸(mo)(mo)屏主(zhu)要是(shi)通過壓(ya)力感(gan)應原(yuan)(yuan)理來實現對屏幕內容(rong)的(de)操作和(he)控(kong)(kong)(kong)(kong)制的(de)，因此電(dian)(dian)阻式觸(chu)控(kong)(kong)(kong)(kong)筆(bi)只需要保證(zheng)能(neng)夠提(ti)供足夠的(de)壓(ya)力就行了，大(da)部分(fen)普通的(de)手寫(xie)筆(bi)也能(neng)達到要求。

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電(dian)(dian)(dian)容式(shi)觸(chu)(chu)(chu)摸(mo)(mo)屏技術是(shi)利用人(ren)體(ti)的電(dian)(dian)(dian)流(liu)感應進行(xing)工作的，因(yin)此(ci)電(dian)(dian)(dian)容式(shi)觸(chu)(chu)(chu)控筆必須采用導(dao)體(ti)材料制作，要有導(dao)電(dian)(dian)(dian)特性。當(dang)觸(chu)(chu)(chu)控筆接(jie)觸(chu)(chu)(chu)到電(dian)(dian)(dian)容式(shi)觸(chu)(chu)(chu)摸(mo)(mo)屏時(shi)，人(ren)體(ti)會通過(guo)觸(chu)(chu)(chu)控筆和(he)觸(chu)(chu)(chu)摸(mo)(mo)屏表面形成以一(yi)(yi)個耦合電(dian)(dian)(dian)容，對于(yu)高頻(pin)電(dian)(dian)(dian)流(liu)來說，電(dian)(dian)(dian)容是(shi)直(zhi)接(jie)導(dao)體(ti)，于(yu)是(shi)觸(chu)(chu)(chu)控筆從接(jie)觸(chu)(chu)(chu)點(dian)(dian)吸走一(yi)(yi)個很小的電(dian)(dian)(dian)流(liu)。這個電(dian)(dian)(dian)流(liu)分別從觸(chu)(chu)(chu)摸(mo)(mo)屏的四角(jiao)上的電(dian)(dian)(dian)極(ji)中(zhong)流(liu)出(chu)，并且流(liu)經(jing)這四個電(dian)(dian)(dian)極(ji)的電(dian)(dian)(dian)流(liu)與手指到四角(jiao)的距離(li)成正(zheng)比，控制器(qi)通過(guo)對這四個電(dian)(dian)(dian)流(liu)比例(li)的精確計算，從而得出(chu)觸(chu)(chu)(chu)摸(mo)(mo)點(dian)(dian)的位置。

如何自制電容觸控筆

1、事先準備好(hao)材(cai)料，包括膠帶、剪刀、鋁(lv)箔紙、棉簽、錫紙、圓珠(zhu)筆等等。

2、將圓珠筆(bi)的(de)筆(bi)芯取出，只留筆(bi)筒待(dai)用。

3、將棉簽一(yi)頭帶(dai)棉的部分剪斷，試(shi)著(zhu)把這(zhe)一(yi)頭棉簽插入筆頭處的孔(kong)，如(ru)果孔(kong)太小(xiao)，就用小(xiao)刀切掉一(yi)小(xiao)塊(kuai)來擴大孔(kong)的范圍。

4、棉簽頭(tou)(tou)塞進筆(bi)頭(tou)(tou)后(hou)，將(jiang)(jiang)筆(bi)頭(tou)(tou)擰緊(jin)，把(ba)錫紙(zhi)包在筆(bi)頭(tou)(tou)上(shang)，將(jiang)(jiang)錫紙(zhi)擰緊(jin)，筆(bi)頭(tou)(tou)保持平(ping)整。之所以用(yong)鋁箔紙(zhi)，是(shi)因為它能傳導(dao)人體(ti)電流，且比較結(jie)實耐磨。

5、用膠帶固定好筆(bi)(bi)頭，筆(bi)(bi)桿用鋁箔紙包緊，接頭處也要用膠帶纏緊，這(zhe)樣(yang)自制觸摸筆(bi)(bi)就制作完成了。