COMPUTER HARDWARE
INPUT DEVICES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Capacitive
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Infra-red
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Resistive
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None of the above
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Detailed explanation-1: -The infrared touchscreen works by detecting interruptions of infrared beams emitted by LEDs embedded in the frame around the touchscreen overlay. There are two rows of IR LEDs, which generate horizontal and vertical invisible IR beams. They form a large beam grid that covers the surface of the overlay.
Detailed explanation-2: -Resistive sensors are the most common form of touch sensors and are used for distance and pressure applications. They can be operated with finger touch or mechanical stylus.
Detailed explanation-3: -Infrared. Just like the magic eye beams in an intruder alarm, an infrared touchscreen uses a grid pattern of LEDs and light-detector photocells arranged on opposite sides of the screen. The LEDs shine infrared light in front of the screen-a bit like an invisible spider’s web.