Resistive touchscreens are touch-sensitive panels composed of two flexible layers coated with a transparent conductive material and separated by an air gap or microdots. Functionality is triggered when the two layers are pressed together. There is a constant uniform, unidirectional voltage gradient applied to one layer. When the two sheets are pressed together, the second layer measures the voltage as distance along the first layer, providing the X coordinate. When this coordinate has been identified, the voltage gradient is applied to the second layer to ascertain the Y coordinate. These operations occur within a few milliseconds, registering the exact touch location as contact is made. The touchscreen must be properly calibrated for variations in resistivity.
Aspects of resistive technology:
Can be activated with a gloved hand
Low cost solution
Not as sensitive as capacitive
Not as durable as other technologies
Projected Capacitive Touchscreens
Projected capacitive or PCAP touchscreen technology is a capacitance system that delivers a sensitive, accurate two-touch actuation. The glass surface is extremely robust, is nearly impossible to "wear out" and is easy to clean. Projected capacitive touchscreens combine high resolution with excellent transparency, making it an excellent choice for most retail and hospitality environments.
Aspects of projected capacitive technology:
Can be activated by fingers or gloved hands
Fast, accurate, touch response