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Home > Archive > Electrical Engineering > May 2007 > LCD driver on digital clocks
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LCD driver on digital clocks
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| Hello all,
I have two reasonably new digital LCD clocks that have a display that is
green background and black characters. On my wife's clock, it was so bright
at nite to keep her awake. I toned it down a bit by dimming the LED's that
lit it from behind. Now it is somewhat hard to read.
I think it would be better if I could reverse the display so that only the
characters are lit. I am not that familiar with LCD drivers, but is there
usually a pin on some (or all) of them that will reverse the display, or is
there some other trick I can use?
Sorry I dont have more info on the chips at this point, but if it isn't
possible, no sense cracking it open again. Thanks for any insight.
--
-bye,
Rick
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--
"Rick" <rick@nowhere.com> wrote in message
news:F6Odnebiao5C19zbnZ2dnUVZ_r-onZ2d@comcast.com...
> Hello all,
> I have two reasonably new digital LCD clocks that have a display that is
> green background and black characters. On my wife's clock, it was so
bright
> at nite to keep her awake. I toned it down a bit by dimming the LED's that
> lit it from behind. Now it is somewhat hard to read.
> I think it would be better if I could reverse the display so that only the
> characters are lit. I am not that familiar with LCD drivers, but is there
> usually a pin on some (or all) of them that will reverse the display, or
is
> there some other trick I can use?
> Sorry I dont have more info on the chips at this point, but if it isn't
> possible, no sense cracking it open again. Thanks for any insight.
> --
> -bye,
> Rick
>
>
I've fiddled with watches some years ago, and if you remove the plastic
polarising filter in front of the display and reverse it, i.e. put the
outside to the inside, it will make what was black clear and what was clear
black. I think this is what you want.
You may be able to do it electrically too, but if you can remove the filter,
it may be easier.
Regards
Barry
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