This is possible using algorithms that filter out interference caused by external electrical activity.

ECONOMIST: Brainwave controllers

With the addition of a new Louver filter, the ZT Series line delivers improved external light shading, clarity and light transmittance.

ENGADGET: Sixteen new plasma TVs from Panasonic for 2013, none that break into larger classes

The new Louver filter and new high performance panel result in improved external light shading, improved clarity and improved light transmittance.

ENGADGET: Panasonic unveils Infinite Black Ultra Panel plasmas for 2012 (eyes-on)