Apple has been working on a Touch ID system designed to be set under the display since at least 2013 (patent published in 2015). We've covered a series of patents since then (01, 02, 03, 04, 05 and 06). Apple analyst Ming-Chi Kuo first predicted that this feature would emerge in 2022 and then changed it again to it emerging in 2023. While we await this feature to arrive in a future iPhone, today the U.S. Patent and Trademark Office officially granted Apple yet another patent relating to Touch ID under the display that focuses on the use of "shortwave infrared" technology.