PSA: Viewing strobing images has caused temporary (lasting hours) backlight issues on my 2021 Macbook Pro, in the past. Somehow, it causes the backlight to continue flickering for some time afterwards, even when looking at static images. It is barely perceptible, but quite noticeable at the edges of the screen - enough to be annoying.
I have no idea if this is a hardware issue with my specific unit, or a more widespread thing.
I caught the flickering on camera (see my other reply). Furthermore setting the display to 60fps (as opposed to 120Hz "ProMotion" VRR) made the flickering go away, and it would come back when I switched back to 120Hz.
That still might be to your eyes. The relevant effects are:
1. effects from your eyes (from looking at the strobing image)
2. PWM brightness controls causing your recordings to look like they strobe
The site in the OP wasn't working, so I tried a demo site instead: https://www.da.vidbuchanan.co.uk/strobegate.html. I looked at the strobing image, closed the tab, and sure enough my monitor (IPS, 60hz) was showing some signs of flickering. It disappeared after a few minutes. However, I performed a second test where I opened the site and didn't look at it with my eyes. The strobe after effect did not show up. Even though I didn't look at the monitor, I verified afterwards that a strobe was shown by a phone video recording. I also did a slo-mo video recording of my monitor without any visible strobe effect, and there was visible strobing in the recording, probably from the shitty PWM. You should follow a similar procedure to rule out whether it's something with your eyes or not.
I've seen this on my phone's 120hz display too (S21 Ultra) and haven't yet determined the cause, but maybe it is related to strobing content. Will have to remember that the next time I notice it.
Threw together a couple PNG files. They look good against a 50% gray background. Perhaps a lighter gray for light_on, a darker gray light_off. Not as hard on the eyes.
I appreciate the strobe warning! Not gonna open it so I have no idea what it is but congrats on whatever it is. Anyway have an up vote for the strobe warning
It is a page with a schematic depiction of a floor lamp. "Click anywhere to turn the light on/off" is written below. When you click, the light turns on or off depending on the previous state, and background color changes accordingly between dark and light. The on/off state is the same for all visitors of the page, so, since this is on the front page of HN, it flickers quickly. Hence the strobe warning.
It's a webpage with a simple picture of a lamp and the text "40 people in the room, click anywhere to turn the light on/off". The page background alters between dark gray and white depending on whether the light is off and on. It's essentially a collective online light flickering exercise and it's about as strobe as you imagine that would be.
Seems to have been killed, there's just question marks everywhere there should be a dynamic value, and I can't interact with anything (Chrome for Android).
> ? in the room, click anywhere to turn the light ?
It's still running, with currently 393 Users and a total of 250000 Clicks. The organic User average seems to be around 50, so i think someone is trying to stress test the System.
That's a good idea. Or you could have a grid of squares, with each person getting their own color when they click each one. Any of these ideas would work much better if you could prevent scripting of course.
We've lived in that world for at least a couple of decades, if limiting to “any one person”. Heck, a thousand is a rookie number: look at all the crap on youtube/tictok getting millions of views.
If you stretch the definition to “any one person with some money” we've been in that world a lot longer.
There is a company that is selling a LED Lamp that blinks at 40 Hz.
They claim it can mitigate Alzheimer's.
This line of devices has become known as 'Gamma Flashers', lots of knockoffs today. From Gamma brain wave state.
There is some, small amount, of science to back this up.
So who is going to be the first person to put up a 40 Hz flashing website?
With appropriate warnings about Photosensitive Epilepsy before showing the page.
Didn't the Dutch ISP Xs4all have this in past where you could remote control the lamps of a Christmas tree in their office? That's a long time ago, before WebSockets or IoT existed. And the server, while being absolutely hammered, kept up.
those who made the web stadards capable of doing _anything_ with the user's computing environment, let it be any useless/arbitrary, and those who forced this arbitrary code execution platform to be the same as the information browsing / catalogue system / document viewer platform what the web originally meant to be.
today users can not manage their bank account, enlist to classes, read newspapers online without the real fear of mining bitcoin for someone involuntarely, DDoS-ing goverment sites by hidden pixels, presenting unsolicited unrelated content to his audience on a presentation, and now, having sight damage...
You've been breaking the site guidelines repeatedly lately. We ban accounts that do that. If you'd please review https://news.ycombinator.com/newsguidelines.html and stick to the rules when posting here, we'd appreciate it. We've already had to ask you about this before.
I have no idea if this is a hardware issue with my specific unit, or a more widespread thing.