submitted 8 months ago by [email protected] to c/[email protected]
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[-] [email protected] 20 points 8 months ago* (last edited 8 months ago)

It's not trivial. An LED only needs power to light up, an OLED Pixel always needs the GPU to be powered on and it would be a significant power loss to implement a pixel sadly

[-] [email protected] 17 points 8 months ago

The full Always On Display (which shows the clock + some notifications) uses less than 1% battery per hour on my ancient S7, are new phones not any better than that?

[-] WhoRoger 5 points 8 months ago

It doesn't if the screen is connected directly to the frame buffer which can refresh independently. Whether that's actually implemented this way in hardware, well who knows, but I suspect it is as that's useful to display any static image. Then just power up the display driver for a microsecond to refresh the image if needed.

[-] MooseBoys 7 points 8 months ago

None of this is true. It may happen in practice on some poorly-designed devices, but the “GPU” in the SoC can remain powered off, and the display controller remain in low-power mode.

[-] [email protected] 5 points 8 months ago

I mean there's a ton of phones that have always on displays (AOD)

this post was submitted on 17 Sep 2023
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