1:21  Privacy Screen?  A privacy filter, or privacy protector.  You put it on your phone or your computer, and it will limit the viewing angle of your phone or screen to make it hard for people nearby to see what's on it.  Think about all the sensitive information we access on our devices we view banking details and passwords we read private conversations.  We watch hentai.  Did she just?

Our private activities are broadcast brightly from our glowing screen, making it super easy for those around us to see what we're doing. I've sat at the back of conference halls and seen the private activity on laptops and phones even from the other side of the room.

2:00.  At 25 meters you can clearly see the detail on both screens.

2:04.  I've sat in movie theaters and read the private conversations of the people in front of me I would have much rather than than watching the movie by the way put your damn phone away!

On public transport people these days use their devices constantly and those nearby can all participate in what I'm sure are not meant to be group activities.  Strangers shoulder surfing on what we do on our devices can be dangerous.  --Wall Street Journal

Thieves are using the iPhone passcode to get into stolen phones and loot they're victims bank accounts and money apps.

He grabbed the phone and then disappeared. 

In fact, just yesterday I was on a plane and a lady a few rows in front had a spreadsheet open, labeled [insert company name here] passwords.  A list.  Of passwords.  That I could read from my seat.

Ha ha ha.  Oh wait, you're serious. 

I almost tapped her on the shoulder to initiate a lengthy conversation about password managers but one simple often overlooked tool that would have also helped her as a humble privacy screen.  With one of these filters attached to her laptop screen, only she could have been able to see what's on the screen preventing people like me looking from the sides from snooping.  

HOW IT WORKS

Let's briefly talk about how the technology works.  Most privacy screens will either use micro-louver tech or polarization tech, and sometimes they have a combination of both.  Micro- louver privacy screens have microscopic slats that work similarly to window blinds by controlling the direction of light.  These screens use the physical structure of micro-louvers to refract, or bend, the light as it passes through the screen directing it straight ahead allowing only the person directly in front of the screen to see the content. When viewed from an angle the light is blocked or refracted in such a way that the screen appears dark or completely black.  Polarized lenses on the other hand are designed to filter the actual light waves, allowing only light traveling in a specific direction to pass through.  The molecules in the polarized film are aligned to block horizontal light waves while permitting vertical waves.  You can also get screens that combine