explainthatstuff
How a touchscreen works#4
Look closely and you'll also spot that there are light diffusers in the screen surround, lined up exactly with the light emitters and detectors. So I'm assuming light beams fan up and out from the emitters along these little grooves, which turn them into fairly precise parallel lines of invisible light.
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#4
Look closely and you'll also spot that there are light diffusers in the screen surround, lined up exactly with the light emitters and detectors. So I'm assuming light beams fan up and out from the emitters along these little grooves, which turn them into fairly precise parallel lines of invisible light.
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.