The Lenovo 3M ThinkPad X240 Series Touch Privacy Filter and the Lenovo 23.0W 16:9 Privacy Filter from 3M use 3M's patented Microlouver privacy technology so that the screen can only be read by people directly in front of the display. Anyone walking by or looking at the display from an angle will see a blank, dark screen. As identity theft becomes a growing concern and laws regarding the release of information become more stringent, the need to protect sensitive data is especially critical. Thanks to unique connection systems, the security filter remains in place even when the laptop is closed.