Capacitive And Resistive Touch Systems

 

Capacitive:

 

Existing work on Touch Systems:

Touch screens have subsequently become familiar in everyday life. Companies use touch screens for kiosk systems in retail and tourist settings, point of sale systems, ATMs, and PDAs, where a stylus is sometimes used to manipulate the GUI and to enter data.

The popularity of smart phone’s , tablet computers, portable video game consoles and many types of information appliances is driving the demand and acceptance of common touch screens, for portable and functional electronics. With a display of a simple smooth surface, and direct interaction without any hardware (keyboard or mouse) between the user and content, fewer accessories are required.

Resistive touch is used in restaurants, factories and hospitals due to its high resistance to liquids and contaminants. A major benefit of resistive touch technology is its low cost. Disadvantages include the need to press down, and a risk of damage by sharp objects. Resistive touch screens also suffer from poorer contrast, due to having additional reflections from the extra layer of material placed over the screen.

A Capacitive stylus is a special type of stylus that works on capacitive touch screens primarily designed for fingers, as on iPhone and most Android devices. They are different from standard styli designed for resistive touch screens.
According to a report by ABI Research, styli are especially needed in China for handwriting recognition because of the nature of its writing system.

Resistive touch screen technology works well with almost any stylus-like object, and can also be operated with gloved fingers and bare fingers alike. In some circumstances, this is more desirable than a capacitive touch screen, which has to be operated with a capacitive pointer, such as a bare finger (gloves will not work on capacitive touch screens). The costs are relatively low when compared with active touchscreen technologies. Resistive touchscreen technology can be made to support multi-touch input. gesture is fed through a computer. One way gesture recognition is being used is to help the physically impaired to interact with computers, such as interpreting sign language.