Monitor filter

From Wikipedia, the free encyclopedia

A monitor filter is an accessory to the computer display to filter out the light reflected from the smooth glass surface of a CRT or flat panel display.[1] Many also include a ground to dissipate static buildup. A secondary use for monitor filters is privacy as they decrease the viewing angle of a monitor, preventing it from being viewed from the side; in this case, they are also called privacy screens.

The standard type of anti-glare filter consists of a coating that reduces the reflection from a glass or plastic surface.[2] These are manufactured from polycarbonate or acrylic plastic.[1] An older variety of anti-glare filter used a mesh filter that had the appearance of a nylon screen. Although effective, a mesh filter also caused degradation of the image quality.[2]

Marketing names of privacy filters:

Support for privacy screen is available since Linux kernel 5.17 that expose it through Direct Rendering Manager and is used by GNOME 42.


  1. ^ a b Kruegle, Herman (2006). CCTV surveillance: analog and digital video practices and technology (2nd ed.). Butterworth-Heinemann. pp. 271–272. ISBN 0-7506-7768-6.
  2. ^ a b Anshel, Jeffrey (2005). Visual ergonomics handbook. CRC Press. p. 56. ISBN 1-56670-682-3.
  3. ^ "HP SureView Whitepaper" (PDF).
  4. ^ "ThinkPad PrivacyGuard with PrivacyAlert". Lenovo. Archived from the original on 2021-12-14.