this post was submitted on 23 Jul 2024
0 points (NaN% liked)

Technology

66067 readers
4727 users here now

This is a most excellent place for technology news and articles.

Our Rules

  1. Follow the lemmy.world rules.
  2. Only tech related content.
  3. Be excellent to each other!
  4. Mod approved content bots can post up to 10 articles per day.
  5. Threads asking for personal tech support may be deleted.
  6. Politics threads may be removed.
  7. No memes allowed as posts, OK to post as comments.
  8. Only approved bots from the list below, this includes using AI responses and summaries. To ask if your bot can be added please contact a mod.
  9. Check for duplicates before posting, duplicates may be removed
  10. Accounts 7 days and younger will have their posts automatically removed.

Approved Bots

founded 2 years ago
MODERATORS
L3s@lemmy.world
enu@lemmy.world
technopagan@lemmy.world
L4s@lemmy.world
0
Ancient CRT monitor hits astonishing 700Hz — resolution reduced to just 120p to reach extraordinary refresh rate (www.tomshardware.com)
submitted 7 months ago by schizoidman@lemmy.ml to c/technology@lemmy.world
6 comments fedilink hide all child comments
 

cross-posted from: https://lemmy.ml/post/18305395

top 6 comments
sorted by: hot top controversial new old
[–] bionicjoey@lemmy.ca 0 points 7 months ago (1 children)

It makes sense you'd be able to get a much higher refresh rate on a tube if you reduce the resolution, since you would be reducing the beam's travel.

[–] deranger@sh.itjust.works 0 points 7 months ago* (last edited 7 months ago) (1 children)

Changing the resolution on a CRT normally doesn’t make the picture smaller. There is no native resolution, phosphors are not pixels. My Viewsonic would display 640x480 or 1600x1200 on the whole 21” regardless. You can also watch the video, it’s not using a smaller area.

I believe the limitation is bandwidth, not the electron beam.

[–] bionicjoey@lemmy.ca 0 points 7 months ago (1 children)

Yeah I didn't think it would make the "pixels" smaller, but the beam would need to pulse less often and therefore could travel more. Maybe I'm misunderstanding what they did.

[–] deranger@sh.itjust.works 0 points 7 months ago (1 children)

Electron beams scan insanely fast, that isn’t the limiting factor. Getting that much bandwidth across a VGA cable is tough. If you wanted super high refresh rates on old CRTs you’d have to drop the resolution. Same concept.

[–] bionicjoey@lemmy.ca 0 points 7 months ago (1 children)

Ah. I see, so reducing the resolution was more about sending frames to the monitor faster, not about optimizing the tube hardware's behaviour

[–] dgriffith@aussie.zone 1 points 7 months ago* (last edited 7 months ago)

Yeah basically you can only signal "on-off" so many times a second in a vga cable before the ons and offs get blurry and unusable. So you can trade lower resolution for a higher frame rate as long as you keep the total number of on-offs below the limits.