We do the private monitor from the old LCD monitor

You can finally do something with your old LCD monitor, which is lying around in your garage. Turn it into a spy monitor! For everyone around, it will look just like a white screen, but not for you, because you will have special “magic” glasses.

All you need is a pair of old glasses, a paper knife and paint thinner.

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Here is what I used:

Of course it's an LCD monitor
disposable 3D glasses from the cinema (old sunglasses are fine)
solvent (or analogues)
paper knife
screwdriver
paper towels
Super glue

Step 1. Take the monitor.

Find an old monitor that you are ready to sacrifice.

Remove the plastic frame by unscrewing all the screws on the back side.

Step 2. Cut out the polarizing film.

Most LCD monitors have a coating of two films on glass: polarizing for filtering light, which you should not see and a matte anti-glare film. We do not need anti-glare, and we use polarization in our glasses.

It's time to take a knife and cut the film on the very edge of the screen. Do not be afraid to press, the metal will not scratch the glass if it does not have any different crumbs and dust.

* Tip from the comments: not all monitors have two films stuck on them, some of them are simply superimposed, and if you remove the protective metal edges of the matrix, you can simply remove them without cutting.

Then tighten the film from the screen. Do not forget to save the polarizing film, just remember its orientation.

Step 3. Clean the screen of adhesive matter.

After you have removed the film, it is likely that glue was left on the screen, we turn to dirty work.

Clean the glue with thinner and paper towels.

I found that if you cover the screen with paper towels dipped in solvent and let them lie, it will be easier to remove the glue. You can also use any piece of plastic or wood to remove the glue by simply scraping the glue off the screen.

Be careful not to get the solvent on the plastic frame.

Step 4. The work on the monitor is completed.

After you have cleaned all the glue, you can assemble the monitor. Even before you make glasses, you can test the monitor with a polarizing film!

Step 5. Remove old lenses.

For creating glasses I used disposable 3D glasses from the cinema, but you can use any others.

Squeeze glass or disassemble glasses if possible.

Step 6. We scan, trace the borders, cut them.

If you plan to use a CNC machine or laser cutting, scan and get an image of the contours of the elements (border tracing).

* the author of the article is engaged in this activity to order, that is why there is such a strange offer for most

I scanned the glass, you can use them as a sample for their location. Remember that its orientation is important for a polarizing film. The sides also matter (front / rear).