Difference between Capacitive touch and Resistive touch


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Difference between Capacitive touch and Resistive touch

2015-07-13 Technology

In the touch panel world, there are two main types of technology: capacitive touch panel (CTP) and resistive touch panel (RTP). Each has its own advantages and disadvantages.

1. Capacitive touch panel

Capacitive touch panel register a touch whenever it comes in contact with a conductive object, such as human fingers. As such, CTP is highly responsive, as they do not require any pressure to register a touch. Even the slightest touch will activate the screen. CTP can use glass as the front panel, which makes them highly durable, easy to clean and resistant to scratches. CTP can also implement multi-touch gestures. In general, CTP is considered to be capable of faster typing speed. However, given the sensitivity of a touch panel, you may have difficulty with typos. The size of the keyboard and the amount of space between keys will deeply affected typing accuracy as well. CTP can be used with a screen protector to keep them clean and scratch-free. 

The disadvantages of CTP comes with accuracy. Most CTP do not respond to objects other than naked human fingers, and thus do not work with a stylus or a fingernail or a gloved hand. Because fingers are far wider than a stylus, this makes handwriting and other precise actions rather difficult. CTP is also more expensive.

2. Resistive touch panel 

Resistive touch panel is constructed from two layers of material with a space between them. When you push on the outer screen, the two layers are pressed into contact, thus registering a touch. Because the system works on pressure, it can be activated using inanimate objects such as a stylus, fingernail or a gloved finger. This makes RTP useful for handwriting and other high precision functions. RTP is also preferable in colder climates, where smartphone and tablet users often wear gloves. RTP is considerably less expensive than CTP. 

The drawbacks of RTP include its inability to support multi-touch gestures, its poor visibility in direct sunlight and its lesser durability. The top layer on a RTP is made of soft, flexible material which can be damaged much more easily than glass. It also may need recalibrating from time to time.

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