通过良好的设计改善触摸屏的性能

　　通过良好的设计改善触摸屏的性能

　　作为触摸屏的日益成熟，他们变得更具挑战性的设计。幸运的是，好的设计规则并没有改变，而且有一些解决方案来帮助我们迎接挑战。

　　人机界面（HMI）在经历了近几年的一场革命。机械的QWERTY键盘与鼠失宠被光滑的触摸屏取代。人们只需考虑手机的演变，看看制造商如何在键盘抛弃的同时，匆忙推出更大更好的触摸屏产品。

　　触控已经使用多年，那么光鲜的应用。例如，触摸功能的许多家用电器如微波炉、洗碗机的键盘很受欢迎，取代昂贵的和不可靠的机械键盘。触摸屏在工业控制环境中被广泛采用，因为它们非常适合通常遇到的恶劣操作环境。

　　These advantages aside， one of the main motivations for touch screen adoption is that mechanical parts wear out and break down with extended use. While keyboards and mice， for example， have proven to be relatively durable HMIs for computer systems， they do eventually break. Dirty， dusty， or humid environments increase the likelihood of early failure because particles and moisture can get into mechanical parts and accelerate wear.

　　Finally， keyboards and switches are hardly the most hygienic devices. While this may not be such a big problem for industrial or domestic environments， it‘s certainly a major issue in medical applications.

　　This article will take a look at capacitive touch sensing， the most popular technology for touch screens in use today， and will describe design techniques that improve the user experience by improving response and minimizing false touches， whereby the device reacts to a finger in close proximity to a sensor button rather than a deliberate touch by the user.