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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
 
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Step 1: 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.

Step 2: Cut the polarized film

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Most LCD monitors have two films on the glass - a polarized one to filter out the light you are not supposed to see, and a frosted anti-glare film. The anti-glare film we don't need, the polarized one we do - it is used for the glasses. 

So, grab you cutting tool and cut the films along the edge. Don't be afraid to press, metal wont scratch the glass, unless there is sand or other abrasives on it.

Then, start peeling. Make sure to save the polarized film, also remember the orientation.

Step 3: Clean the film adhesive

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After you remove the film, the glue will likely remain stuck to the glass, so here comes the messy part.
With some solvent, soften the glue and wipe it off with paper towels.
I started with OOPS, but that was not fast enough so I got some paint thinner.
I found out that if you cover the screen with paper towels and then soak them in paint thinner you can let it sit longer and dissolve the adhesive without running and evaporating.
Scrape off the soft glue with a piece of plastic or wood.
Be careful not to get paint thinner on the plastic frame, because it will dissolve it.

Step 4: Monitor - done

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After cleaning the adhesive, assemble everything back the way it was. Before even making the glasses, you can test the monitor with the polarized film!
Notice how the upper left corner looks clear, because it has the anti-glare film removed. That is the part we are going to use to make the glasses.

Step 5: Pop the lenses out

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For the glasses, I used single use 3D glasses from the movie theater, but you can use whatever you want.
Pop out the lenses or take the glasses apart if you can.

Step 6: Scan, Trace, Cut

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If you are going to use a cnc blade or laser cutter, scan and trace the parts.
You can find a local vinyl or laser cutting service, or you could send them to an online service like Outfab.com
I scanned the frames so I can use them as a reference for the lens orientation.
Remember, this is a polarized film so the angle is critical. Back and front also matters.
If you don't have access to a cnc cutter or you don't want to wait for an online service, you can probably tape the old lenses on the film and then cut them out with an x-acto knife.

Step 7: Reassemble glasses and enjoy!

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Finally assemble the glasses and you are ready for some fun!
People might think you are crazy, staring at a blank white screen wearing sunglasses!
But I guess that makes it even more fun!
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BaronVonBAMF10 months ago

Hey I need some help. So I removed polarizing filter, and removed the glue from the screen.The Glasses work but only when there up against. Any farther then that it's burly. Anyone know the problem?

Yes, you have the two pieces of film stuck together. The Anti-glare (clear) and the polarizing (gray). Put the piece of film in hot water, and wait for the water to cool, then carefully!! (I cut my finger on the edge) peel the two pieces apart. Tada!

JulieHenriksen11 months ago

Is this possible to do on a laptop?

I SO want to be that crazy local girl at the cafeteria, working and staying bussy looking at her white blank screen all day long.

For all you people reading today, the answer is yes. Just did it to my hp pavilion-g7

LOL Julie that would be pretty epic!!!!

elliotnash24 days ago

This is pure genius! Not exactly a practical invention, but impressive nevertheless.

How did you come up with this idea?

coyo182 years ago
I found out how to remove the polarized sheet from the anti-glare sheet if they're attached to each other. What you do is put the films that you obtained from the monitor in some hot water. Leave it in there until the water cools and the sheet should curve. Pick at one of the corners or edges until you can manage to peel off the polarized layer. Only the area that was submerged will be able to be peeled off.

I hope this is helpful

I love you so much it's probably a crime.

Thank You!

Thanks man, was wondering how to get the films separated.

Wow, thanks! Will definitely try this! I just recently got a little 14" VGA monitor for $20 at a thrift store and I was planning on trying this (the Instructable) out on it when I have some spare time. Thanks for your comment!

tayl coyo181 year ago
Hey bud, just wanted to say a big thank you. I can confirm, if your polarized sheet is seemingly bonded with the anti-glare layer, microwave a mug of water for 2-3 minutes and let the cutouts soak for half an hour or so.

The two layers will separate like stickers from a sheet :)
crogshockey4 months ago

yes it works for all LCD, cellphones and LED's. and TFT screen too. I did in my child hood with small "digital calculator". None of my friend could use my calculator, But was master then in making calculations using the same calculator

mfarooqi5 months ago

yes it works for all LCD, cellphones and LED's. and TFT screen too. I did in my child hood with small "digital calculator". None of my friend could use my calculator, But was master then in making calculations using the same calculator

can it work tft moniter

yes it works for all LCD, cellphones and LED's. and TFT screen too. I did in my child hood with small "digital calculator". None of my friend could use my calculator, But was master then in making calculations using the same calculator

LogernH5 months ago

Can you use polarized sunglasses instead of putting the polarized film in the glasses?

mfarooqi LogernH5 months ago

you can try. polarized films and glasses works in the same way. but glass are great built quality.

borg.borjal5 months ago

does this work on all LCD panels? on cellphones? and what about LED?

Snellingkorey6 months ago

Haha, brilliant, this would be great in reception at work for employees only!

GsmM7 months ago

I've got a new (NEW) Qosmio 3d laptop that I would love to do this on, does anyone know if it can be done on this type of screen? If I touch my screen, it will show a variety of colors under my finger that is touching the screen, so I don't know if that's anything special as far as taking it apart and removing the anti glare screen and the polarized film?????

Can anyone help me, I'd hate to ruin it right off the bat!!!!

gio.s2.ariane made it!7 months ago

Fiz o teste, com o material retirado do monitor ficou bem ruim a qualidade de visualização, somente se eu colocar o "óculos" bem próximo do monitor pra ficar com uma qualidade boa, a uns 10/15cm já fica ilegível...

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davidbarcomb8 months ago

Simple project yet very useful. Thanks

Mark250218 months ago
Do you thing this would be possible to do on a smartphone screen? I have an old 50 phone and would love to make people think im crazy using a blank screen!
yieldlymph8 months ago

Hey I need some help. So I removed polarizing filter, and removed the glue from the screen.The Glasses work but only when there up against. Any farther then that it's burly. Anyone know the problem?

FletchINKy1 year ago
Is it possible to do the reverse?

Glasses that block out everything except the computer screen?

#foreveralone

Haha! Just get distracted too easily! This way I would be able to work on the couch with my wife while she watches the TV without having the constant flickering in my vision, drawing my eyes away from the work I'm doing on my laptop.

Self control shades B)

Blocking the TV is definitely possible. After removing the polarized
film try to look at the TV through it, if it appears black, you're done.
If it does not, rotate your display and film 90° and it will.

Ohhh I see :) Good idea

ktrantham10 months ago
To be honest im not 100% sure! but I would imagine they would, I doubt they have invested all the $$ to make a different type of LCD IMO YES

Will this work with all monitors?

hex i beleive he said LCD monitor

okay then will it work with all LCD monitors?

NewBlake11 months ago
I saw this back in 2012 and wanted to do it but find a way to do it for a client as an advertising campaign. I was beaten to it by a company in Sydney who used this technique for Axe (the deodorant). good results.

as anyone tried this with other people round? What are people's reactions to the white screen and you looking with sunglasses :)

good

wonderful

cgosh1 year ago

There's more than one kind of 3-D glasses in theaters, so shop around if yours don't satisfy. Polaroid-brand sunglasses (and some other brands) are polarized. You can tell if yours are polarized by putting one lens in front of another (you'll need two pairs, or pieces of polarizing material), so light passes through both before you see it. If they're both polarized lenses, spinning one of them around will make your view go light, dark, light, dark, light for a 360-degree spin. Polarized sunglasses are the ones that let you peer into the water in a lake or ocean by eliminating the surface reflections. Their neutral color is also reported to be better for your health than typical colored sunglass lenses (see John Ott, "Light, Radiation, and You").

Good afternoon, you can fill with any type of lens?, Not to worry if I damage the polarized. Thank you.

calmlunch1 year ago

super

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