This paper-like monitor uses a clever trick to cut its power consumption by 80% — Hannspree Hybri uses ambient light and boasts a 75Hz refresh rate

Hannspree Hybri monitor uses ambient light for paper-like readability, reducing energy use while maintaining standard display performance across varying conditions.

source https://www.techradar.com/pro/this-paper-like-monitor-uses-a-clever-trick-to-cut-its-power-consumption-by-80-hannspree-hybri-uses-ambient-light-and-boasts-a-75hz-refresh-rate