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> There are many CRTs in your TV or monitor. They are each aimed to deliver electrons to a precise spot on the back of your TV where they excite the phospor in
by roelschroeven 3y ago
> There are many CRTs in your TV or monitor. They are each aimed to deliver electrons to a precise spot on the back of your TV where they excite the phospor in the tiny spot on your TV that the electron hits. Magnets are used to guide the electrons to that precise (and tiny) spot. The excited phosphor molecules at that spot then emit light. All the CRTs working together generate the picture on your TV.
That's incorrect: there aren't many CRTs in a TV or monitor. There's just one in monochrome displays or three in color displays. That paragraph even seems to imply that there is one CRT per dot. I don't think you would even need magnets to guide electrons (much less one set of magnets for all the CRTs): just aim each CRT at the correct location. Seems a weird misconception from someone who calls themselves a physicist.
- kylebenzle 3y agoThe author did not seem to be concerned with the facts or explaining how CRTs actually work :(
- tverbeure 3y agoNot the only incorrect statement in the article. > For example, LED TV use individual LEDs to switch on and off to construct a picture. Nope. Unless they're talking about microLED TVs, which is almost certainly not the case.
- ace2358 3y agoAnd they only recently came into existence! (In tv sizes that is, plenty of large ‘macro’ led panels for large sizes.
- fsckboy 3y ago> There's just one in monochrome displays or three in color displays. the CRT is the giant glass picture tube, cathode ray tube, there is only one of those in a TV. For color TV there are 3 "guns" shooting electrons at the different colored phosphors. There is a single system to guide all three electron beams to their respective right parts of the display. http://www.learnersplanet.com/sites/all/sites/default/files/images/CRT-Television-2.jpg http://www.learnersplanet.com/sites/all/sites/default/files/...