Carbon footprint of unwanted data use by smartphones

Re:Carbon footprint of unwanted data use by smartphones by xnx on Wednesday September 14, 2022 @02:09PM (#32840929)

This reminds me of the obscure campaign to change the Google homepage background to black to save electricity. There are much higher value things to spend our time and attention on.

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Re:Carbon footprint of unwanted data use by smartphones by NotYourLawyer on Wednesday September 14, 2022 @02:20PM (#32841104)

It’s not the biggest waste in the world, but it’s a particularly galling one. “You want to spy on me, use my data cap, use my battery, and generate CO2? No thanks.”

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Re:Carbon footprint of unwanted data use by smartphones by jeffbee on Wednesday September 14, 2022 @02:15PM (#32841028)

Black is a high power state for LCDs.

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Re:Carbon footprint of unwanted data use by smartphones by always2slow on Wednesday September 14, 2022 @02:51PM (#32841566)

Not for OLEDs. I just tested my LG C1, 64 watt difference between full screen black #0000000 and full screen white #FFFFFF at 120hz

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Re:Carbon footprint of unwanted data use by smartphones by scrollaway on Wednesday September 14, 2022 @08:19PM (#32845332)

The campaign referenced by GP is very old. It dates from before OLEDs. LCDs were the most common screen type and CRTs second most common at the time.

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Re:Carbon footprint of unwanted data use by smartphones by Melatonic on Wednesday September 14, 2022 @09:14PM (#32845762)

How much does it draw in total before / after? Curious how much of a percentage change this is

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Re:Carbon footprint of unwanted data use by smartphones by always2slow on Thursday September 15, 2022 @11:12AM (#32853254)

228w - total system draw with LG C1 off/standby

270w - #000000 fullscreen

332w - #FFFFFF fullscreen

270w-228w = 42w #000000 fullscreen power draw

332w-228w = 104w #FFFFFF fullscreen power draw

( 104w - 42w ) / 42w = 2.4761

so ~248% more power usage from the screen for full #FFFFFF.

One thing to note is I have the OLED pixel brightness set to 50/100 and the brightness set to 50/100. 2.2 Gamma, black level: full. The LG C1 has some auto brightness baked into the firmware and it fluctuates, I tried to measure it at full brightness but as you can see today it's at 62w over #000000 compared to before so there is some deviation. However, I think it's safe to say that darker colors do actually save substantial power on OLED displays. Plus the black levels really are just amazing. Black is actually black and not a weird grayish with backlight shining through like TN/IPS LCDs.

edit: formatting.

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Re:Carbon footprint of unwanted data use by smartphones by Dma54rhs on Wednesday September 14, 2022 @03:58PM (#32842552)

What was the difference?

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Re:Carbon footprint of unwanted data use by smartphones by always2slow on Wednesday September 14, 2022 @06:51PM (#32844539)

64 watts?

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