The 3M privacy filters from Lenovo utilize patented 3M microlouver privacy technology, ensuring that the screen can only be viewed by individuals directly in front of it. Bystanders or those viewing the display from an angle see a blank, dark screen. As identity theft becomes an increasing concern and laws regarding the disclosure of information grow stricter, the need to protect confidential data is particularly critical. Thanks to unique attachment systems, the security filter remains in place even when the laptop is closed.