Regarding OLED... Does screen curtain reduce power drain?

Hi,

so probably in the same quandary as most of you, which new iPhone to get. Pros have nothing particularly interesting on them aside from the LIDAR which, for the time being, isn't a useful tool to the blind. I'm left weighing up the iPhone 12 and the iPhone 12 mini. Form factor wise, until I hold both, I'l not be able to say which is right for me. If anything, the mini sounds a little small as I'm used to the iPhone 8. Anyway, the main thing for me, as I'm sure it is for most, is battery life.

the Mini comes in at 10 hours of video streaming whilst the iPhone 12 comes in at 11. This is probably the best metric as it is everything on, 5g, processor, screen etc rather than just the local video playback. Naturally these will translate to very different real world result dependent on use, but we can safely say that the iPhone 12 will last approximately 10% longer than the mini.

My question is, this is to people with iPhones with the OLED displays which I believe are the Pros from last year, does screen curtain have a baring on battery life? I realise that with the LCD it doesn't as the screen is still on, but OLED, as far as I understand it, switches elements off to get those deeper blacks etc, so, in theory, with screen curtain on, the screen is actually off, reducing power drain.

What are peoples thoughts, experiences or knowledge on this?

thanks

O