shieldfoss:
fnord888:
Thought 1: Hey, yeah, cool.
Thought 2: Wait, do they use more electricity than the rendering the same scene without a lamp? Is it just the background effort of the having the computer on, not the lamp itself? Hmm.
Thought 3: Calculating real-time lighting is one of the computationally expensive parts of modern video games, and power draw goes up with computational load, so adding a lamp to a scene plausibly does make rendering that scene use more electricity. So, yeah, cool.
shieldfoss:
Even with the cheapest simplest light model: A lighter room draws a white, rather than black, screen – achieved with more electricity.
eggman-is-fat-mkay:
Only if you’re using an OLED or one of those fancy multizone LCD panels that are actually more trouble than they’re worth. OLED screens work by starting from black and adding light you do want. LCD screens work by starting out with a bright white screen and filtering out all the light you don’t. They’re not perfect at this which is why OLED screens get deeper blacks. Fun fact! This is also how those cool “snowblind” PC cases work – they’re just LCD screens without a backlight.
Your average run-of-the-mill LCD will use exactly as much power displaying a plain white screen as a black one.
Also, barely tangentially related, but I just want to share a fun fact. You know those blinking nametag keychains they sell in gift shops?
these?
they’re actually LCD screens with a single massive segment! the name is actually a printed page behind the LCD panel, which applies power to turn the LCD cell opaque and make it black. that’s why if you cover the solar cell on the top with your finger, the name stays showing and gets dimmer, and doesn’t completely disappear unless it has power.
If your desktop’s LCD screen works the way these do (some draw power on white, some on black), a plain black screen may in fact draw infinitesimally more power.
shieldfoss:
HUH
Tags:
#fun with loopholes #the more you know #this post was queued because my to-reblog list is too long and I didn’t want to dump it on you all at once