Privacy screen protectors typically employ micro louver technology, which allows light from the screen to pass through only at specific angles, similar to the operation of Venetian window blinds, but at a microscopic level. These protectors feature a filter layer with a narrow front angle, usually set at 60 or 90 degrees. When viewing the screen from outside this angle, the content becomes obscured or invisible to onlookers, ensuring that only the intended user can see the displayed information, effectively safeguarding privacy in crowded or public spaces.