explainthatstuff
How a touchscreen works#3
Here's a closeup of the main circuit board. The big hole at the top is where the battery normally goes. But of most interest are all those little yellow/white dots around the screen. Those are the light emitters and detectors that shoot infrared beams across the surface of the screen to detect your fingers.
This photo is from our article on how touchscreens work.
Our images are published under a Creative Commons Licence (see opposite) and are free for noncommercial use. We also license our images for commercial use. Please contact us directly via our website for more details.
How a touchscreen works#3
Here's a closeup of the main circuit board. The big hole at the top is where the battery normally goes. But of most interest are all those little yellow/white dots around the screen. Those are the light emitters and detectors that shoot infrared beams across the surface of the screen to detect your fingers.
This photo is from our article on how touchscreens work.
Our images are published under a Creative Commons Licence (see opposite) and are free for noncommercial use. We also license our images for commercial use. Please contact us directly via our website for more details.