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Bouncing DVD Logo

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Re: Bouncing DVD Logo

#201

Post by ChrisMarshallNY »

katzgrau wrote: post #69
kens wrote: post #60

As a historical note, the bouncing logo wasn't just for fun, but was important to prevent screen burn-in on CRTs. If you had a static image on a CRT for a long time, it could damage the phosphor. Sometimes you could even see the image when the screen was off! This was the original purpose of screensavers, which saved your screen from damage. Displaying a dynamic image prevented one part of the screen from being overu…

Just following this thread to see if anyone here thought screensavers were just for fun :)

Anybody remember Todd Rundgren’s Utopia Softworks?

They were going to redesign the Apple operating system, and started with the screensaver.

It was a very cool screensaver, but I’m not sure how much progress they made beyond that.

Re: Bouncing DVD Logo

#202

Post by Dahoon »

segfaultbuserr wrote: post #198
kens wrote: post #60

As a historical note, the bouncing logo wasn't just for fun, but was important to prevent screen burn-in on CRTs. If you had a static image on a CRT for a long time, it could damage the phosphor. Sometimes you could even see the image when the screen was off! This was the original purpose of screensavers, which saved your screen from damage. Displaying a dynamic image prevented one part of the screen from being overu…

Ironically, the increased popularity of OLED displays in television, computer and smartphone screens has brought this problem back. If this trend continues, perhaps those 3D maze, tubes, fish, will come back to everyone's computers soon.

Actually it was Plasma that did that a long time before OLED.

Re: Bouncing DVD Logo

#203

Post by navaati »

segfaultbuserr wrote: post #198
kens wrote: post #60

As a historical note, the bouncing logo wasn't just for fun, but was important to prevent screen burn-in on CRTs. If you had a static image on a CRT for a long time, it could damage the phosphor. Sometimes you could even see the image when the screen was off! This was the original purpose of screensavers, which saved your screen from damage. Displaying a dynamic image prevented one part of the screen from being overu…

Ironically, the increased popularity of OLED displays in television, computer and smartphone screens has brought this problem back. If this trend continues, perhaps those 3D maze, tubes, fish, will come back to everyone's computers soon.

But hey, raytraced !

Re: Bouncing DVD Logo

#204

Post by dawnerd »

ricardobeat wrote: post #143
jsf01 wrote: post #109

Earlier quoted context omitted.

This is definitely not smooth on iOS, on a brand new iPhone that’s arguably way faster than whatever system played the original DVD screensaver. On a technical note, not that there’s much you can do about this, but because you’re reading clientWidth and clientHeight each frame, you’re forcing reflow. A performant implementation would probably require avoiding the DOM altogether within the draw loop, so that would mea…

There are no elements in the page for style to be recalculated, so I doubt the reflow is what's slowing it down. I'm curious on what could cause bad performance for you though. It runs smoothly at 60fps on an iPhone 11 and the iPad, using Safari. Did you open the standalone page at https://wwpzj.csb.app/ ? My only guess would be that the CodeSandbox UI is too heavy for mobile. For science, I went ahead and converted…

Not smooth here either. Can tell it wants to but will hiccup every now and then.

Re: Bouncing DVD Logo

#205

Post by segfaultbuserr »

Tepix wrote: post #200
segfaultbuserr wrote: post #198

Earlier quoted context omitted.

Ironically, the increased popularity of OLED displays in television, computer and smartphone screens has brought this problem back. If this trend continues, perhaps those 3D maze, tubes, fish, will come back to everyone's computers soon.

Let's hope we just stick to black screens to save some power and prevent burn-in at the same time.

Why didn't we do this back in the CRT era, and invented screensaver instead, then? TV is understandable, you don't want a DVD player to show a black screen, otherwise it appears dead. But what about screensavers on computers, why did it come into being? (I know turning a CRT on takes time, but we don't have to turn it off completely to blank the screen either?)

Update: It appears that the original motivation was public terminals/machines.

Re: Bouncing DVD Logo

#207

Post by goblin89 »

Talanes wrote: post #140
toomanybeersies wrote: post #116

Earlier quoted context omitted.

I wonder if 2000n years from now, scholars will be wondering over the meaning of that sentence, the same way that they currently discuss the meaning of "wine-dark sea" in the Iliad and the Odyssey ( https://en.wikipedia.org/wiki/Wine-dark_sea_(Homer) )

That section on ancient languages tending to lack blue is very interesting. I wonder if there was just a lack of blue in their environment. If the local birds and flowers don't contain any blue, then you just have the sky and the sea(or whatever large body of water.) If the majority of the blue you see in the world is the sky and the sea, would you just start to think of blue as a blank? If you just consider blue as…

Homer’s wine-dark sea leads down an interesting rabbit-hole of thinking about perception, other minds, shared labels for sensations, how one individual consciousness is shaped by (exists only in context of?) others, and the implications of the information age with more extensive inter-mind connections and increasingly numerous and specific shared labels.

Re: Bouncing DVD Logo

#208

Post by [deleted] »

epse wrote: post #184
z3t4 wrote: post #179

Earlier quoted context omitted.

I visited a TV shop about 5 years ago and some of the TV's up on display had the demo image burned in. So it's probably still a problem.

LCD can definitely have burn in

[deleted]

Re: Bouncing DVD Logo

#209

Post by nelblu »

chrisseaton wrote: post #191
tunnuz wrote: post #89

Earlier quoted context omitted.

Aren’t DVDs popular anymore?

No, they’re low resolution and bulky. Do many people even own an old DVD player anymore?

I still buy DVDs because I like classic movies and for those movies it doesn't matter whether you watch in dvd quality or Blu-ray. Plus DVD rips are significantly smaller in size and even though I have Blu-rays for some movies I don't have a Blu-ray player on my computer to rip them. So effectively my preference is to buy DVD, unless it's a relatively modern movie (post 90s)

Re: Bouncing DVD Logo

#210

Post by 72deluxe »

epse wrote: post #184
z3t4 wrote: post #179

Earlier quoted context omitted.

I visited a TV shop about 5 years ago and some of the TV's up on display had the demo image burned in. So it's probably still a problem.

LCD can definitely have burn in

My Honor Play phone has this problem if the screen is higher than 50% brightness. It's very bad.
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