Electronics

Home-built privacy monitor made from an old LCD

Home-built privacy monitor mad...
By following a few simple steps, anyone can turn an old LCD into a privacy monitor with contents visible only to the person wearing a pair of special glasses
By following a few simple steps, anyone can turn an old LCD into a privacy monitor with contents visible only to the person wearing a pair of special glasses
View 8 Images
A shell from the inside of the LCD, which is made of two layers - polarized and anti-glare, has to be cut with the X-Acto knife
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A shell from the inside of the LCD, which is made of two layers - polarized and anti-glare, has to be cut with the X-Acto knife
By following a few simple steps, anyone can turn an old LCD into a privacy monitor with contents visible only to the person wearing a pair of special glasses
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By following a few simple steps, anyone can turn an old LCD into a privacy monitor with contents visible only to the person wearing a pair of special glasses
The anti-glare film needs to be peeled, while you'll need to save a piece of polarized film
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The anti-glare film needs to be peeled, while you'll need to save a piece of polarized film
The adhesive from the inside has to be wiped using a solvent, such as paint thinner before assembling the LCD back
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The adhesive from the inside has to be wiped using a solvent, such as paint thinner before assembling the LCD back
Basically, the secret behind the hack is the polarized film, which is normally used to filter backlight from what's actually visible on the screen
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Basically, the secret behind the hack is the polarized film, which is normally used to filter backlight from what's actually visible on the screen
The privacy hack requires a pair of 3D glasses or sunglasses
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The privacy hack requires a pair of 3D glasses or sunglasses
By following a few simple steps, anyone can turn an old LCD into a privacy monitor with contents visible only to the person wearing a pair of special glasses
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By following a few simple steps, anyone can turn an old LCD into a privacy monitor with contents visible only to the person wearing a pair of special glasses
By following a few simple steps, anyone can turn an old LCD into a privacy monitor with contents visible only to the person wearing a pair of special glasses
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By following a few simple steps, anyone can turn an old LCD into a privacy monitor with contents visible only to the person wearing a pair of special glasses
View gallery - 8 images

Many of us still keep old LCDs that should have been discarded long time ago. There might be a good reason, however, to refrain from disposing of this obsolete equipment. By following a few simple steps, anyone can turn an old LCD into a privacy monitor with contents visible only to the person wearing a pair of special glasses (also home-built), while anyone else can only see a white surface.

An Instructables' user who goes by the nickname dimovi has described this clever LCD hack. Apart from an old LCD, it also requires paint thinner (or some other solvent), 3D glasses or sunglasses frames, as well as an X-Acto knife. Basically, the secret behind the hack is the polarized film, which is normally used to filter backlight from what's actually visible on the screen.

First, you'll need to dismantle the monitor and cut the shell from the inside, which is made of two layers - polarized and anti-glare. The anti-glare coating needs to be peeled off as it's not needed, while you'll need to save a piece of polarized film - it will serve as lenses for the glasses.

The adhesive from the inside has to be wiped using a solvent before assembling the LCD back. The last step is to create glasses, in which the polarized film is used for lenses.

It's hard to say whether anyone will use this monitor to view NSFW contents on a daily basis, but certainly it can be used to surprise your friends and workmates.

There are of course, easier ways to achieve some privacy like 3M Privacy Filters, which darken the screen while viewed from the side. Sure it's more practical, but then you miss out on the fun of tearing apart your old monitor.

Source: instructables

The following video shows the privacy monitor LCD hack in action:

Privacy Monitor Hack

View gallery - 8 images
3 comments
hibni
This might not be very practical, but it\'s really a great hack!
johnweythek
this is techno ghost ink. if anyone remembers that stuff. if i hadn\'t already torn apart my old lcd\'s i would totally have my tools out.
grgogo
We did this back in the early \'80s with our TI 35 calculators. Just pop the polarized lens out of the calculator, mount it in a pair of glasses and only we could see the display on our calculators. Dumb but fun. But not new...