The display-standard specialist group TÜV Rheinland has announced its new Dynamic Privacy Filter certification, and that 2021's ThinkPads X1 Carbon and X1 Yoga are the first 2 devices to officially match up to it. The 2 business PCs have done so by passing a battery of tests on their ability to protect sensitive data under a variety of lighting conditions.
https://www.notebookcheck.net/Lenovo-s-latest-ThinkPad-X1-Carbon-and-Yoga-models-are-the-first-PCs-with-the-new-TUEV-Rheinland-Dynamic-Privacy-Filter-certification.528714.0.html