Electron tube screens found in classic TVs use high voltage in vacuum capsules just as the classic X-ray machine does.
But x-ray emission has several frequencies, the higher being the problematic (energetic) ones.
B&W TV's didn't have emission problems because the high voltaje used was under 10000 volts, and at that voltage no X-ray is produced.
Color TV's, use 21000 and even 22000 volts. More is prohibited, as at that voltages X-rays are produced in huge quantities.
At 21000-22000 volts the X-rays produced are low power and rather scarce, but if next to the screen, where they're concentrated, it's been suggested that they might be harmful to health. Which it is.
Plasmas are made out of low emission cells, and no radiation is generated toward the viewer.
LCD's are almost powerless, except for the fluorescent tubes used as backlight, which make no problem at all.
Mind X-rays don't harm eyes only, but every cell they can reach.
Then, you can watch closer Plasmas and LCD's with no risk, except for visual fatigue.
But x-ray emission has several frequencies, the higher being the problematic (energetic) ones.
B&W TV's didn't have emission problems because the high voltaje used was under 10000 volts, and at that voltage no X-ray is produced.
Color TV's, use 21000 and even 22000 volts. More is prohibited, as at that voltages X-rays are produced in huge quantities.
At 21000-22000 volts the X-rays produced are low power and rather scarce, but if next to the screen, where they're concentrated, it's been suggested that they might be harmful to health. Which it is.
Plasmas are made out of low emission cells, and no radiation is generated toward the viewer.
LCD's are almost powerless, except for the fluorescent tubes used as backlight, which make no problem at all.
Mind X-rays don't harm eyes only, but every cell they can reach.
Then, you can watch closer Plasmas and LCD's with no risk, except for visual fatigue.
