一般是不能多点触控，即只能支持单点，若同时按压两个或两个以上的触点，是不能被识别和找到坐标的。在电阻屏上要将一幅图片放大，就只能多次点击“+”，使图片逐步进阶式放大，这就是电阻屏的基本技术原理。 利用压力感应进行控制。当手指触摸屏幕时，两层导电层在触摸点位置就有了接触，电阻发生变化。在X和Y两个方向上产生信号，然后传送到触摸屏控制器。控制器侦测到这一接触并计算出(X，Y)的位置，再根据模拟鼠标的方式运作。电阻式触摸屏不怕尘埃、水及污垢影响，能在恶劣环境下工作。但由于复合薄膜的外层采用塑胶材料，抗爆性较差，使用寿命受到一定影响。 电阻式触摸屏利用压力感应进行控制，它的表层是一层塑胶，底层是一层玻璃，能承受恶劣环境因素的干扰，但手感和透光性较差，适合佩带手套和不能用手直接触摸的场合。
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