I imagine it will be oled or something similar. Any black pixels will simply be off. Not sure how a white pixel saves power though, since it needs all three RGB to make white.
good observation! with this contrast 10% backlight is enough for almost 80% of lighting conditions.
we initially used OLED and our phones after testing managed to use on average around 65% of the energy with our ui. We're dropping it unfortunately as its a supply-chain nightmare.. (for now). Black and white mainly increases your focus sharply
