Advantages of CRT over LCD • Hacker News Board

Re: Advantages of CRT over LCD

#91

Post by timonoko » Wed, Aug 31, 2022, 10:30 AM UTC

We are still waiting for the infinite precision displays "pixels are dying at alarming level, but they are individual atoms so no matter". Was this from William Gibson?

Anyways. I have already planned how this display is constructed. Instead of individually addressing every pixel, the display is backed with layered pyramid of guad-decoders, which divide the display to four smaller displays. The picture or quad-message Q={Q,Q,Q,Q} can be of any precision, but when the decoder does not see sub-decoders but just pixels, it just calculates the average and turns the pixel on.

The beauty of display of mine is that they can be stacked. You just add another decoder-level behind the display. Or may they are constructed that way, so you can repair a display by replacing one 64x64 pixel module.

Re: Advantages of CRT over LCD

#92

Post by davidgerard » Wed, Aug 31, 2022, 10:34 AM UTC

bironran wrote: post #17

The biggest advantage of CRT is that my cat could sit on one. He would be drawn to that heat generating machine, lay on top of it with his fore legs dangling over the edge of the screen and snooze while I played whatever video game was the current hit well into the night. I miss that cat-butt-warmer. I miss my cat too.

the death of the monitor toy

not sure about cat hair in the vents though!

Re: Advantages of CRT over LCD

#93

Post by rsecora » Wed, Aug 31, 2022, 10:38 AM UTC

>>>> Usually when there are limitations, the computer and display are able to negotiate compatible options and hide the incompatible ones.

Ejem... there was a time were X configuration was black magic, and only the bold venture to change it.

Re: Advantages of CRT over LCD

#94

Post by MorrisMinor » Wed, Aug 31, 2022, 10:39 AM UTC

The best thing about CRTs was holding a magnet near the screen to twist the electron beam. Gives you an intuitive understanding of the sideways force experienced in a magnetic field.

EDIT: Also, it was heaps of fun!

Re: Advantages of CRT over LCD

#95

Post by Zardoz84 » Wed, Aug 31, 2022, 10:43 AM UTC

wheybags wrote: post #75

asciimov wrote: post #71

Things I don't miss from CRTS: Their weight, the heat they put off, eye strain caused by low refresh rates (below 75hz for me), having to adjust the rabbit ears or outdoor antenna when one of the 4 channels got too snowy, image burn in. Things that I miss from CRTS: black is black not grey, console tvs and tv's as furniture, better viewing angles as people didn't mount their damned tv over a fireplace or up high in g…

Adding one not-missed item to the list: the annoying high pitch whine

15KHz aprox. Not every body notices it

Re: Advantages of CRT over LCD

#96

Post by sgt » Wed, Aug 31, 2022, 10:44 AM UTC

Dalewyn wrote: post #27

Veliladon wrote: post #2

The biggest advantage is that CRTs can have variable geometry pixels which match a lot of older resolutions and aspect ratios. While it's a lot easier to deal with non-square pixels on higher resolution displays (i.e. 1600x1200 can properly emulate a 1.2:1 rectangular pixel of a 320x200 display) CRTs still have effectively infinitely variable shaped pixels.

LCDs and their ineptitude with non native resolutions deeply annoys me. Sure, pixels in an LCD are fixed, but even resolutions that are multiples of 2 of their native resolution look like crap. 4K monitor? Surely it can handle 1080p, it's just dividing by 2; four physical pixels for one logical pixel, right? Nope! Looks like horseshit. Seemingly LCD monitors can't divide by 2. CRTs can handle any resolution within th…

Isn't this less of a problem nowadays as most LCD's are high density (retina)?

Re: Advantages of CRT over LCD

#97

Post by ygra » Wed, Aug 31, 2022, 10:58 AM UTC

wheybags wrote: post #75

asciimov wrote: post #71

Things I don't miss from CRTS: Their weight, the heat they put off, eye strain caused by low refresh rates (below 75hz for me), having to adjust the rabbit ears or outdoor antenna when one of the 4 channels got too snowy, image burn in. Things that I miss from CRTS: black is black not grey, console tvs and tv's as furniture, better viewing angles as people didn't mount their damned tv over a fireplace or up high in g…

Adding one not-missed item to the list: the annoying high pitch whine

That's only for TVs, though. Computer monitors had higher refresh rates and were not audible.

Re: Advantages of CRT over LCD

#98

Post by timonoko » Wed, Aug 31, 2022, 11:00 AM UTC

timonoko wrote: post #91

We are still waiting for the infinite precision displays "pixels are dying at alarming level, but they are individual atoms so no matter". Was this from William Gibson? Anyways. I have already planned how this display is constructed. Instead of individually addressing every pixel, the display is backed with layered pyramid of guad-decoders, which divide the display to four smaller displays. The picture or quad-messag…

BTW. This display is many ways similar to CRT or rather vector displays. When gaming you can send Q-messages to areas of intense activity and the rest remains the same. Q-message needs to have ignore flag (Ign).

As an example this message turns the lowest-rightmost pixel Red on 256x256-display:

    (Ign Ign Ign
     (Ign Ign Ign 
      (Ign Ign Ign
       (Ign Ign Ign
        (Ign Ign Ign Red)))))

Q-messages are in Lisp, of course.

Re: Advantages of CRT over LCD

#99

Post by nicoburns » Wed, Aug 31, 2022, 11:03 AM UTC

nottorp wrote: post #90

xwolfi wrote: post #74

Earlier quoted context omitted.

Try OLED it solved the black, the viewing angle, the video games look insane, the near zero bezels make the image seem floating and well a remote control can adapt brightness well.

It did? I thought they're advertising themselves based on how effectively they can blind you. You could turn down the brightness on a CRT down to 10% or less at night and still use it.

Why can’t you turn the brightness down on your lcd?

Re: Advantages of CRT over LCD

#100

Post by grumbel » Wed, Aug 31, 2022, 11:03 AM UTC

jagger27 wrote: post #4

Have there been any attempts to make something like a CRT with phosphors and an electron gun in a thinner form factor? What if we had a grid of smaller electron beams targeting a small display section instead of a single large one? Can it be done without vacuum tubes today?

The Sony Watchman[1] had the electron gun at the bottom shooting at a tilted screen instead of shooting at it from the back. This allowed to make a GameBoy-sized portable CRT TV.

There is also an interesting LCD/CRT hybrid from JVC[2], it's not flat by itself, but the way it adds color to an otherwise black&white screen could be used in slim designs.

[1] https://www.youtube.com/watch?v=c5ZTQ5BvNIQ

[2] https://www.youtube.com/watch?v=z-q8ehzHeQQ