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Making a Privacy Monitor From an Old LCD
ryzvonusef writes "Instructables Member 'Dimovi' utilized a spare LCD monitor and converted it into a 'privacy' monitor. He took apart the monitor's plastic frame, cutting out the polarized film with a utility knife and removed the film adhesive from the glass panel before reassembling the monitor, which now shines a bright white regardless of what is actually being displayed on the screen. He then removed the lenses from a pair of theater 3D glasses, and replaced it with the polarized film he had just removed from the monitor. Now, he is the only one who can see what he is doing on his computer."
Sure, unless anyone else is wearing polarized sunglasses in the vicinity.
Iirc polarizing sun glasses always have horizontal polarization (or was it vertical, can't remember, it's basically aimed at removing the rays reflected off water surface).
You can require exact opposite polarization here, meaning that sunglasses wouldn't work.
I'd be willing to bet that the minute someone on an airplane sees you staring at an all white screen for any period of time there will be an Air Marshal tapping you on the shoulder.