Re: TI-H: EL Backlight installed!
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Re: TI-H: EL Backlight installed!
From: Richard Piotter <richfile@prairie.lakes.com>
>> I use goof off to get the sticky stuff from the mirror off... Then
I
>> reliazed there was some stupid green thing on the screen, so I took
a razor
>> to it and peeled it off... Now my LCD is white clear... The true
color
>> from the el shows through, and isn't difused...
>
>Front of back??? If it's the front, then you removed the diffuser.
There may
>be a second diffuser on the back of the LCD too! I'm suprised it
works! Oh
>well, if it works, it works!
Ok, I looked at these 'diffusers' that you guys keep refering to.
There are
two, one of the front, and one on the back. I'm pretty sure they are
both
polarizing filters. This LCD is constructed exactly the same way as
every
other calculator LCD I have ever taken apart. Like this:
[--Filter--]
[--Glass---]
[----LC----]
[--Glass---]
[--Filter--]
[---Foil---]
The two filters are oriented 90 degrees to each other. Apparently the
LC (Liquid Crystal) or glass layers make a third filter or just rotate
the polarization (unless the pixel is on).
Anyway, you can see that the 'diffusers' are really polarizers by
getting
another polarizing filter and putting it on the LCD. The edges of the
LCD, where the green filter is not, is clear, the green filter itself
will turn black (if you turn your filter the right way).
Here is a thought experiment for you:
You have three polarizing filters, one at 0 degrees, one at 45, and
one at 90, relative to each other. If you stack them 0,90,45, with
a light source behind the 0, the stack will be black, because the 0
and 90 will block all the light.
What happens if you put the 45 between them?? 0,45,90 ?
DK
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