Magnets use to mess up all my screens. How can Apple put one in their phone, right next to the screen?
In: Technology
Old screens used to blast a stream of electrons at little pixels to light them up and steered that stream using electromagnets in the side. If you put a magnet beside it you could permanently magnetize part of the screen which pushed the beam off target
Most modern screens use lots of tiny wires that carry tiny electrical signals to tiny crystals that twist when electrified, we use these little crystals to filter the light coming up from the backlight. Little crystals aren’t magnetic, they don’t care what you do
Higher end screens like OLED use little blobs that glow when electricity is applied to them and lots of tiny wires running to all the blobs and they turn the blobs on and off as needed. Again, no magnetic things in the system so nothing cares about magnets in the phone or speaker or in your hand.
Phones use completely different screen technology than old TVs. Magnets used to mess up cathode ray tube (CRT) screens because those used a set of magnets to steer a single beam of electrons back and forth across the screen’s surface in the process of drawing an image. Modern screens use LCD or OLED technology, where each pixel is individually instructed on what it should display using an electric current, no magnets involved.
Because screens now are LED.
Tube tvs are different, electrons travel and project the picture, a magnet messes up the course of travel.
Screens used to use magnets to direct a beam of electrons at the screen.
Adding a different magnet would mess things up.
Now-a-days screens use liquid crystal, which don’t depend on magnets.
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