Re: Defective Laptop Display Panels - Possible Source of Polarizing Film?????
I have tried to use LCD panels as polarizers with mixed results:
- Peeling of the polarizing film from the glass panels.
- Cut out useful disks from the glass panels+polarizing films.
Peeling off the polarizing film works quite well, but the film is not clear. It also acts as diffuser.
Cutting disks out from the glass panels adds 1 more problem:
- The rear panel has the Red/Green/Blue pixel filter printed on it.
- The front panel has a pixel grid printed on it.
Both interfere with light transmission. Finally I gave it up after cutting up 2 LCD panels.
The LCD liquid can be washed off easily. I do not know if it is toxic.
Behind the LCD glass panels are a number of quite useful plastic sheets that act as diffuser for the LED or plasma back lighting.
I hope this helps.
--- In Microscope@yahoogroups.com, "Pete W." <enwode@...> wrote:
> Hi there, all,
> I recently replaced the display panel in a friend's lap-top (He'd dropped the computer and it became a tartan generator!)
> I know that an LCD panel works by twisting the plane of polarization of pre-polarized light. I wonder if this means such defective panels could usefully be 'mined' for their polarizing film?
> Possible problems: is the liquid crystal material toxic or hazardous or just prohibitively messy???
> In 'LED' screens, do the LEDs merely replace the cold-cathode back-lights or do they actually generate the light for each pixel?
> Might small segments of the electronic 'works' of these panels make interesting/useful microscopical subjects?
> Have any group members trod this path? I'd welcome members' views on this topic.
> Best regards,
> Pete W.
> (aka 'Enwode')