一般是不能多點觸控，即只能支持單點，若同時按壓兩個或兩個以上的觸點，是不能被識別和找到坐標的。在電阻屏上要將一幅圖片放大，就只能多次點擊“+”，使圖片逐步進階式放大，這就是電阻屏的基本技術原理。 利用壓力感應進行控制。當手指觸摸屏幕時，兩層導電層在觸摸點位置就有了接觸，電阻發(fā)生變化。在X和Y兩個方向上產生信號，然后傳送到觸摸屏控制器。控制器偵測到這一接觸并計算出(X，Y)的位置，再根據模擬鼠標的方式運作。電阻式觸摸屏不怕塵埃、水及污垢影響，能在惡劣環(huán)境下工作。但由于復合薄膜的外層采用塑膠材料，抗爆性較差，使用壽命受到一定影響。 電阻式觸摸屏利用壓力感應進行控制，它的表層是一層塑膠，底層是一層玻璃，能承受惡劣環(huán)境因素的干擾，但手感和透光性較差，適合佩帶手套和不能用手直接觸摸的場合。
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