Untitled topic • Hacker News Board

#1

Post by andreitp1 » Mon, Dec 20, 2021, 9:54 AM UTC

No post body was provided.

Re: undefined

#2

Post by totetsu » Mon, Dec 20, 2021, 11:08 AM UTC

Is anyone else getting a certificate error?

also.. tangentially I have been experimenting with directly exposing photo paper with my phone screen, and pulling it away in a fraction of a second. Do any android devs out there know if it would be feasible for me to whip up an app that flashed the screen including backlight on and off to show an image for a fraction of a second at a specific brightness?

Re: undefined

#3

Post by onion2k » Mon, Dec 20, 2021, 11:24 AM UTC

Making your screen all black saves energy.

For many monitors this is not true. For a screen where the resting state of the LCD pixels are open displaying black means the monitor has to switch the diffuser to closed in order to block the light, which uses more energy than displaying white. There are lots of different LCD technologies which affect whether black or white is more efficient. For CRT screens black is always better.

https://www.scientificamerican.com/article/fact-or-fiction-b...

Re: undefined

#4

Post by mirekrusin » Mon, Dec 20, 2021, 11:41 AM UTC

There should be "where's waldo?" option to find 1 pixel that's off.

Re: undefined

#5

Post by wiz21c » Mon, Dec 20, 2021, 11:43 AM UTC

the mouse pointer is still there... So not completely black :-)

Re: undefined

#6

Post by beardyw » Mon, Dec 20, 2021, 11:45 AM UTC

totetsu wrote: post #2

Is anyone else getting a certificate error? also.. tangentially I have been experimenting with directly exposing photo paper with my phone screen, and pulling it away in a fraction of a second. Do any android devs out there know if it would be feasible for me to whip up an app that flashed the screen including backlight on and off to show an image for a fraction of a second at a specific brightness?

My guess would be a 'display over other apps' app which swapped from black to transparent and back might be more responsive than trying to use the backlight. Just a guess though.

Re: undefined

#7

Post by noisy_boy » Mon, Dec 20, 2021, 11:46 AM UTC

I use a completely black image as my desktop background just to avoid the background light around windows with dark/night mode (the impact is more pronounced at night because I like to turn-off the lights in my room at night while using the computer). Also makes watching movies nicer when I don't want them full screen.

Re: undefined

#8

Post by omgitsabird » Mon, Dec 20, 2021, 12:01 PM UTC

    
    
      document.addEventListener('click', () => document.body.requestFullscreen())

Re: undefined

#9

Post by mellosouls » Mon, Dec 20, 2021, 12:06 PM UTC

I like this, though would be useful for a bookmarkable (ie. clickable with url) version of the individual colours.

Re: undefined

#10

Post by littlestymaar » Mon, Dec 20, 2021, 12:11 PM UTC

This is kind of creepy: for some reason Firefox only displays the “Full screen” pop-up warning several seconds after the website has actually gone full screen. I don't know what causes this delay, but if there's a way to raise it high enough, it completely defeats the point of the warning, and could lead to fishing.