, industry-leading polarizer technology provides 25x better off-axis contrast than a typical LCD display. Reference modes • Industry-standard reference mode...

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

To determine HRV, Apple Watch captures a tachogram—a plot of the time between heartbeats—every two to four hours. Beginning with watchOS 5.1.2, users may al...

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