development included a diverse population of research participants — across a range of ages, sexes, races, ethnicities, and body mass indexes (BMI) — in bot...

https://www.apple.com/jp/healthcare/docs/site/Estimating_Sleep_Stages_from_Apple_Watch_Sept_2023.pdf

depth provide over a billion colors and incredibly smooth gradients. Extreme Dynamic Range (XDR) • Extreme Dynamic Range takes brightness and contrast to a ...

https://www.apple.com/jp/pro-display-xdr/pdf/Pro_Display_White_Paper_Feb_2020.pdf