Hello Malcolm,
>I am a bit confused with LCD backlight diffuser.
>It has a really nasty looking thin film on top which appears to be protective only then below it another matt white
>thin film which appears to be attached at LED ends of the diffuser only.
>Looking at the instructions it appears to say that I should not remove any of these.
>Help please. Do I remove the top one which looks awful, both or none?
My LCD diffuser had 4 layers. The back side was thin as paper and was white. Next was a thick, water clear, plastic
sheet, same thickness as printed circuit board material. Next was a thin, soft, white diffusing layer that was only
attached at the LED ends of the plastic plate. Next was a really crummy thin film, like you'd wrap a sandwich in for
lunch. This was buckled up in places, and looked like it might show up in the display. I tried to make it be flat,
but that made it worse.
The way the thing is supposed to work is light bounces around in the clear plastic plate. Some scatters off
of the back side white layer and shines through the front. Some gets caught by the front white layer and also
shines through the front. The idea is to pipe the light around in the clear plate so that it spreads out evenly,
and then lets some of the light leak out the front by scattering from the top and bottom films.
So, don't damage or remove the bottom (backside) white film. Don't damage or remove the top (frontside) matt white film.
I don't think the crummy, slightly cloudy looking film that protects the top matt white film should be there, but
I could be wrong. I took mine off. My display looks just fine, but I can see a little extra brightness at the left
and right edges from the LEDs.
73 and GL, Michael, AB9GV
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