How does a touch screen sense touch?

I recently overheard a woman on the subway telling her friend that her toddler “swipes” everything in their house – the coffee table, books, plates and even her own mother, trying to make her disappear like an image on a touch screen. read more

Touch panels based on this method are called pressure-sensitive or analog-resistive film touch panels. In addition to standalone LCD monitors, this technology is used in a wide range of small to mid-sized devices, including smartphones, mobile phones, PDAs, car navigation systems, and the Nintendo DS. read more

Majorly there are two basic types of touch screens, 1: Resistive 2: Capacitive Resistive: Firstly, the touchscreen you use at the local ATM and the one on your smartphone are completely different types of technology. read more

Newer touch screen technologies are under development, but capacitive touch remains the industry standard for now. The biggest challenge with touch screens is developing them for larger surfaces – the electrical fields of larger screens often interfere with its sensing capability. read more