Capacitive vs Resistive Touchscreen
Touchscreen technology has invaded our mobile phones, tablet PCs, laptops and even desktop computers. Capacitive touchscreen and resistive touchscreen are two technologies used in touchscreens. The underlying principles in these two technologies are quite different and are well worth knowing. A proper understanding in these technologies is mandatory in fields such as computer hardware development, Operating system designing for computers, Mobile phone application development and many other fields. In this article, we are going to discuss what resistive touchscreen and capacitive touchscreen are, their pros and cons, how resistive touchscreens and capacitive touchscreens are built, their similarities and finally the difference between capacitive touchscreens and resistive touchscreens.
Resistive Touchscreen
电阻触摸屏技术是开发触摸屏设备的广泛使用的技术。在这项技术中，将电阻材料的哑光放在顶层，并将导电板放在底层上。两层之间有一些微电位的气隙。当在表面上施加压力时，在顶层和底层之间形成闭路。可以分别使用垂直线和水平线的电阻来识别触摸的位置。由于电阻触摸屏是基于触摸敏化表面的压力，因此不需要任何特殊的手写笔或任何其他设备才能操作。但是，涉及电阻触摸屏的主要问题是它对不必要的触摸做出了反应。这些不必要的触摸可能会导致手机上的口袋拨号和其他设备上的单击。
Capacitive Touchscreen
Capacitive touchscreens are also widely used as touchscreen devices. In this technology, a transparent conductor is coated on a transparent insulator. Most common of these conductors is Indium tin oxide. The insulator is almost always glass. When a conductor is in contact with the conduction surface of the screen, it will change the electric field of the conducting surface. The determination of the touch location is done using several methods. The surface capacitance method calculates the capacitance of the four corners of the display when a conductor is touching the conducting layer of the screen. The projected capacitance method uses a grid like conductor structure to determine the location with more accuracy than the surface capacitance. The main problem involving the capacitive touchscreen is that it requires a conductor to activate the touch sensitivity. This becomes a real hassle in the winter when the gloves are worn. There are special kinds of gloves made of conducting tips and the inbuilt stylus would also work, but both these items are not convenient. On the pro side, since this is sensitive to the conductivity, it will not pocket dial your phone.
What is the difference between Resistive Touchscreen and Capacitive Touchscreen? •电阻沾creen uses the resistance of the conducting grid to get the location of the touch. The capacitive touchscreen uses the change of capacitance due to an external conductor to locate the touch. •电阻沾creen is a passive technology, whereas the capacitive touchscreen is an active technology. |
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