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SED display tech explained. - Adventures in Engineering — LiveJournal
The wanderings of a modern ronin.

Ben Cantrick
  Date: 2006-10-30 02:26
  Subject:   SED display tech explained.

SED (hereafter "SCEED" because that's the acronym really ought to be) is basically CRT TV moving to the modern era. Here's a picture worth 10 million ad-copy soundbites to any geek with a knowledge of TV electronics:

They're tossing out all that 18th century "steer the electron beam with electromagnets!" crap, and setting up a grid of thousands of little electron emitters, one behind each pixel. Very nice. Those of you who know how a plasma display works will see that this is a lot like a simpler version of that.

The tech won't be here for 5 years, but when it arrives... this combines the image quality of a CRT with the form factor of an LCD. And it's going to wipe the floor with both of them, if the engineers can get the cost to reasonable levels.

More slobbering marketingspeak here.
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Alex Belits
  User: abelits
  Date: 2006-10-30 03:15 (UTC)
  Subject:   Obvious questions:
1. Longevity of electron emitters.
2. Operating temperature.
3. Is it REALLY necessary to develop a new way to accelerate electrons toward the CRT-like phosphor, as opposed to developing a light emitter that matches it without a need for such acceleration? Say, how does it compare with a LED laser?
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  User: jigenm4c
  Date: 2006-10-30 07:40 (UTC)
  Subject:   (no subject)
Yeah, but you've gotta admit that's a pretty BIG "if". :) I'm just hoping that once these LCD displays finally die, SED displays will be cheap enough to fit on my desktop and have a fast enough refresh rate that I'll be happy with the radiation coming from the displays. I like the fact that LCDs have no harmful rays being projected from them, but whether or not this is a fact with SED displays also remains to be seen.
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  User: nickhalfasleep
  Date: 2006-10-30 16:26 (UTC)
  Subject:   (no subject)
It may be too late if in the same timeframe organic LED's do the whole process in one layer. Electron->phosphor only win out when they produce a brighter picture and better contrast. Add to that the weight of an (I assume) evacuated glass container and the weight also gets pretty heavy.
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Ben Cantrick
  User: mackys
  Date: 2006-10-30 21:45 (UTC)
  Subject:   (no subject)
It may be too late if in the same timeframe organic LED's do the whole process in one layer.

If OLED stuff can get really cheap, in order to offset its relatively short lifetime (~10k hours last I heard) then OLED should definitely win...
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May 2015