9 ms·

CRTs also have pretty high drawbacks... High energy use (remember the high energy use of plasma displays which were basically flattened CRTs). Flashing, bulk, h

CRTs also have pretty high drawbacks... High energy use (remember the high energy use of plasma displays which were basically flattened CRTs). Flashing, bulk, high material cost. Radiation (since you were basically looking into a beta-radiation emitter). So no. I don't think it will be back. Modern displays are much easier to make also, more high-tech but use less energy and materials.

perardi 5y ago
They also require somewhat obscure rare-earth elements, which are not getting cheaper. https://en.wikipedia.org/wiki/Phosphor https://en.wikipedia.org/wiki/Phosphor You'd also have to scale strontium mining and refining back up.
formerly_proven 5y ago
> Radiation (since you were basically looking into a beta-radiation emitter). This is completely wrong while technically correct. Sure, electron guns throw electrons around. So you are looking at a beta-emitter. But those electrons can't leave the tube. Even if they could - CRTs have, depending on size and application, an acceleration voltage of somewhere between 10 and 30 kV - this translates to a range of a few centimeters in air at best. CRTs do produce radiation, namely X-rays by way of bremsstrahlung due to the electrons getting, well, bremsed at the screen. This is part of the reason why CRTs are heavy (aside from faceplate structural integrity); leaded glass is heavy. > Flashing Visible flicker is obviously undesirable, but low duty cycle displays are preferable for moving images.
- GekkePrutser 5y ago
  > CRTs do produce radiation, namely X-rays by way of bremsstrahlung due to the electrons getting, well, bremsed at the screen. This is part of the reason why CRTs are heavy (aside from faceplate structural integrity); leaded glass is heavy. True, I didn't want to get into that level of complexity. The electrons are also quite easy to capture with conductive glass. But the bremsstrahlung can be significant.

perardi 5y ago

They also require somewhat obscure rare-earth elements, which are not getting cheaper. https://en.wikipedia.org/wiki/Phosphor https://en.wikipedia.org/wiki/Phosphor You'd also have to scale strontium mining and refining back up.

formerly_proven 5y ago

> Radiation (since you were basically looking into a beta-radiation emitter). This is completely wrong while technically correct. Sure, electron guns throw electrons around. So you are looking at a beta-emitter. But those electrons can't leave the tube. Even if they could - CRTs have, depending on size and application, an acceleration voltage of somewhere between 10 and 30 kV - this translates to a range of a few centimeters in air at best. CRTs do produce radiation, namely X-rays by way of bremsstrahlung due to the electrons getting, well, bremsed at the screen. This is part of the reason why CRTs are heavy (aside from faceplate structural integrity); leaded glass is heavy. > Flashing Visible flicker is obviously undesirable, but low duty cycle displays are preferable for moving images.

GekkePrutser 5y ago
> CRTs do produce radiation, namely X-rays by way of bremsstrahlung due to the electrons getting, well, bremsed at the screen. This is part of the reason why CRTs are heavy (aside from faceplate structural integrity); leaded glass is heavy. True, I didn't want to get into that level of complexity. The electrons are also quite easy to capture with conductive glass. But the bremsstrahlung can be significant.