10 replies to this topic

[ProDigit]

Ok,
Basically what I did was a brightness mod, but also removing the polarization filter (All filters on top of the screen).
(see here: )

Then I bought some polarization foil, and cut out shapes which I inserted in my sunglasses.

Now only a person seeing through a polarization filter (like me when I'm wearing the glasses) can see what's on my screen.

To all other users the screen looks blank (white).

It may be a 'useless' hack, but I thought of 2 things I could do with my broken screen:
Either replace the filter, or just build the filter in my sunglasses.

I did the latter.

Thank you, & I hope my idea might be good to some.

ciao

Edited by ProDigit, 25 July 2008 - 10:34 PM.

[barry99705]

That's kinda cool. Wonder if it works with just regular polarized sunglasses?

[Vinhtvu2]

Wait a minute... so how do I do this?

I too have a shitty failed attempt polarization removal screen...

the corner is peeled a little. So what do I do? remove the rest of it? then take that, and trace it on my sunglasses and attach it the polarization screen to the sunglass? this is a neat trick! I can sit there using the computer and people would be like wtf!?

Haha.... give me a little more details please, me likey the mod!

[ProDigit]

Well, basically there are 3 types of polarization filters out there that I know of.
The first is the circular polarization used eg: in photography for the lenze.
The second is a polarization filter to blank the screen for anyone sitting next to you ( a little plastic foil over your screen, to give you a smaller viewing angle)
The third polarization filter, gives the effect I showed you on the video; it's the most simple of all; a lineair polarization filter.

LCD screen uses 2 of them.

I'm not a pro in this area, but I only get things as far as I explain here.
I might be off here or there, but I think for most part the following info is correct:

When light is emitted from the back of the lcd panel, it first goes through the first polarization filter.
Basically this filter only allows certain waves of light to enter.
If the filter is held horizontal, and it will allow eg: horizontal light waves to pass through,then rotating the filter 90 degrees will make it only allow vertical light waves to enter. And so it works for any angle you can think of (set the filter at 45 degrees, then the filter will only pass lightwaves at 45 degrees angle...)

Normal eyes can not differenciate between horizontal or vertical light waves, as it sees any angle of lightwaves as light. But this type of filter somehow seems to only allow light in one angle to pass.

Then the light passes the LCD screen.
In the LCD screen, there is a substance in every pixel that causes the horizontal lightwaves to be rotated a few degrees (from 0 to 90 degrees) all the way to the point where the horizontal waves can be rotated to become vertical ones.
When the vertical lightwaves hits the top Polarization filter which is set identical to the first one (set to pass horizontal light beams), the light won't pass, and you'll see a dark screen.
If the controller sends a signal to a location on the LCD (eg a group of pixels), to not let the lightwaves be rotated you end up with a light screen (or light spot on the screen).

Anyways leaving the basics of LCD behind, I would not encourage you to remove the polarization filter, unless you are missing like more then 10% of the screen.
Seeing that the polarizationfilter applied by Asus uses some silicon based glue, to glue the filter on the screen, I would not suggest you using the filter for your sunglasses.
First of all, because when removing the filter you will most likely destroy the filter. I mean, the filter is harder then the plastic (Kind of like a 0,2mm layer of glass between .3mm of plastic.).

Even if you succeed to get a piece of the filter out unharmed, the filter is inbetween plastic layers, and glue that will hinder your sight visually (make the screen look blurry).
The glue and filter being less then 1mm from the LCD screen doesn't really blurr the screen, however, if you use the filter in your glasses (about 1-2feet away from the screen) probably the screen might look blurry.

So far I have tried 2 lineair filters from that store, the LCD one with and without glue.
I would recommend the one without glue for the glasses.
The one with glue seems nice to restore your screen however it does leave bubbles in the screen.
Probably using a hairdryer to warm up the glue, and slowly pust the bubbles out with a small tissue might work, but I haven't really tried it.

I do say a mini notebook like the Eee 701 still catches people's eyes!
Especially if there's a guy typing furiously on it, having a blank screen! lol
Yes having a white screen seems to attract more people's gaze then a black screen!

cheers!

[TranSonicX]

Howdy

Anybody got an idea of a source of this polarizer film?
I am in South Africa and to source something like this will be impossible.

I to have a nice chuck out of the corner of my 2GB Surf screen and would like to get it working again.

Ross

[markp1989]

i have an lcd with a damaged polarizer, i may have to try this lol

[AYE-SUS THIS]

Quote

Ok,
Basically what I did was a brightness mod, but also removing the polarization filter (All filters on top of the screen).
(see here: )

Then I bought some polarization foil, and cut out shapes which I inserted in my sunglasses.

Now only a person seeing through a polarization filter (like me when I'm wearing the glasses) can see what's on my screen.

To all other users the screen looks blank (white).

It may be a 'useless' hack, but I thought of 2 things I could do with my broken screen:
Either replace the filter, or just build the filter in my sunglasses.

I did the latter.

Thank you, & I hope my idea might be good to some.

ciao

Man I wanna see these glasses, upload a picture hehe..

[gtisingh]

The sunglasses are shown in the youtube link.
They are pretty cool, would be better if the filters were stiff instead on flimy.

[markp1989]

adding this with one of them privicy screens would be awsome, looks black to every one else, and looks normal to you when you wear the glases

[ProDigit]

that'd be impossible;since the other filter will block the screen.
Whatever is black on the screen can't become light with the glasses. Reverse is possible though.

[carmenara]

This must be one of the most innovative mods there, bravo :)