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Picture of Privacy monitor hacked from an old LCD Monitor
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Finally you can do something with that old LCD monitor you have in the garage.
You can turn it into a privacy monitor! It looks all white to everybody except you, because you are wearing "magic" glasses!
All you really have to have is a pair of old glasses, x-acto knife or a box cutter and some solvent (paint thinner)




Here is what I used:
an LCD monitor of course
single use 3D glasses from the movie theater (old sunglasses are just fine)
paint thinner (or some other solvent such as toluene, turpentine, acetone, methyl acetate, ethyl acetate etc)
box cutter (and CNC laser cutter :) but that you don't really need, I'm sure x-acto knife and a steady hand would do just fine)
screwdriver or a drill
paper towels
superglue

Step 1: Take the monitor apart

Picture of Take the monitor apart
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Find an old monitor that you are willing to sacrifice.
Take off the plastic frame by unscrewing all screws from the back.

 
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calmlunch1 year ago

super

i made it but after remove the polarized sheet LCD view is like nagitive on three sides how to hide this

clickyummy1 year ago

nice

bearblue1 year ago

super

bearblue1 year ago

super

This looks amazing but might be a bit above my DIY level. Has anyone tried this with other people round? What are people's reactions to the white screen and you looking with sunglasses :)

MrOrsh1 year ago

I am in the middle of trying this at the moment and I have gotten as far as getting the polarized film that is attached to the anti-glare-filter off the screen. I am doing the "put in hot water"-trick to separate the two films and it works great. However getting them separate does nothing for the blurryness! Even with the completely transparent film removed and only the shadowy-one left if I move an inch away from the screen everything goes blurry.

Could it maybe be three filters joined togehter? I have tried peeling on the darker film to see if something else comes off but there seem to be no more to peel off :-/

What can be wrong?

account3r2 made it!1 year ago

Here's my result... turned out pretty well. I bought film online and the pieces I bought were just slightly smaller than my glasses frame...

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chimplost1 year ago

what kind of film is in the lenses? i want to just buy a new sheet of it.

Linear polarization film. It's somewhat expensive, and can be bought online.

account3r21 year ago

My dad got the whole film off in one piece except for a little corner piece by using a credit card and dipping it in alcohol to carefully peel off the film :) Also, this glue is VERY stubborn. I let the film soak in acetone for 15 minutes and the glare filter dissolved completely but most of the polarization filter was left, but nothing happened to the glue. It barely even softened.

Oh, and I can still kinda see stuff on the monitor while looking directly at it, and I can see everything if I look at it from an angle

As in, the image rendered on the screen.

I have found that the this method will work with just about any form of LCD screen. I purchased a $15 phone and removed the polarized screen. I rigged a pair of non-obtrusive reading glasses with a polarized piece of film from a monitor. Now I am the only one who can see my screen.

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cool!!!

kballdy1 year ago

what kind of film is in the lenses? i want to just buy a new sheet of it.

TheKrister22 years ago
I was hoping anyone could tell me if this kind of screen would work with this:

BenQ GL2750

I am going to test this on my old screen (a 19" screen) to get it all in my system so I know what to do.
I have read the comments and the "creator" said that it would work on any lcd screen but I have also read in the comments that some lcd screens have their "film" like almost glued on or something.
So I hoped anyone could tell me this.

It'll work on any LCD, and both that I've done it on had the films glued together and to the screen.

Can you do that with a smartphone?
No, since a smart phone doesn't have enough filter material to make a proper set of glasses.

I know this is a year late but I felt I should point out that you can just buy polarization film online that would work just fine :)

why the hell would you want to?
Very cool project! I recently learned about polarizers in physics class so I asked the tech guys at my school if they had any old LCD monitors around. They handed me a beat up old laptop with no hard drive or battery, but a working screen. I cut around the edges but ended up chiseling off the film (didn't scratch surprisingly) because it was very brittle from aging. Don't worry about saving the film, you can buy polarizing plastic squares online.

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Awesome! Great work repurposing/learning from/experimenting with old/obsolete electronics!

sadikerd1 year ago
i did this thing. But i have a problem. i you put polarized film further, the screen is getting cloudy. it means it is not clear. In your movie it is so clear. How can we fix this problem?
Good afternoon, you can fill with any type of lens?, Not to worry if I damage the polarized. Thank you.
pmudd2 years ago
Does this work on the dell inspiron mini 10 Nickelodeon edition.
marchlo pmudd1 year ago
that sounds like a very bad idea, do not take your net book apart.
Hey is the polarized film supposed to be SUPER hard to get off the screen? I've been trying for hours with no luck :/
Trading1 year ago
Good afternoon, you can fill with any type of lens?, Not to worry if I damage the polarized. Thank you.
I have read the comments and the "creator" said that it would work on any lcd screen but I have also read in the comments that some lcd screens have their "film" like almost glued on or something.
pmudd2 years ago
Cool that is a good idea
This is something that i should try at least once in my life!!
kwilliams382 years ago
Would this removal allow for UV to pass thru the screen? I am working towards a 3D printing process using DLP projectors. If I were to construct this and backlight it with uv lamps would I get passthru?
dimovi (author)  kwilliams382 years ago
I don't think so. I believe the glass blocks most UV light.
timothymh2 years ago
I've removed the film from the monitor (works great!), but the polarized film and anti-glare film are still stuck to each other. How did you separate them?
Chloe82 years ago
no more privacy screen protecter needed haha
Tastache2 years ago
This is something that i should try at least once in my life!!
Shateebough2 years ago
One million of different uses for this monitor, definitly i have to build one
kwinters22 years ago
destroyed my computer..... good thing i tried it on my OLD one first...
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