Re: TI-H: Backlight
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Re: TI-H: Backlight
it's not better, in my own opinion, if you HAVE to have it plugged into
an external supply to run it. My option costs only $40 (maybe less), and
it lights the entire screen nicely. You will STILL have the SAME PROBLEM
with the DIMMER pixels and DARKER background. It has to do with the
polarizer. I hope you figure it out, but as long as mine works, it's
fine. I will have to use a different brand or model screen, cause these
are nolonger sold, but many monochrome displays use this setup to light
up, so I just need to look!
>
>I have found a better way to do the backlight. The only problem is it
>costs $95.00 and it HAS to have an external power supply. It has to
>because it needs an inverter to use DC power. I forget the name of the
>company right now, when I remember I will post. To install the thing is
>really simple though. You just pull the gray "mirror" from your screen
>and put place this screen behind your LCD. It sticks using that static
>kinda thing.
>
>Gregory
>
>
>
>
>Richard Piotter wrote:
>>
>> Hi!
>>
>> I want to post it, but time and work have prevented me from even
>> updating the battery expander page. I took a Sharp LM64P something
>> backlit monochrome LCD apart. It is 640x480 pixsels, and the
>> diffratction panel is really good. Lights the whole screen if cut
right!
>> I don't guarantee your screen will work WELL with it, but I do
guarantee
>> it will light it up. The screen lights fine. The problem comes in
with
>> some newer screens (maybe it's newer screens, but I'm not sure). The
>> problem is that to properly install the backlight, you need to cut
the
>> rubber that holds the screen off and then peel the mirror off. You
put
>> the mirror on the back (rough) side of the difractor and put a
diffuser
>> on top, then the LCD. The problem is that some screens use the mirror
>> and polarizer at a different angle, and it isn't compatible with the
>> diffuser. It dimms the pixels and darkens the background. It isn't
bad
>> on some calcs, but it gets fairly annoying on others. Austin butler
had
>> a "dim" calc, but he got it and said it took a while to get used to,
but
>> that it wasn't too bad. All I can say is you can try. The problem is
it
>> it is a dim one and you decide not to do it, it is nearly impossible
to
>> put the mirror back on without looking VERY strange. It will have air
>> bubles and dust, no mater how you replace it. If you like you can try
>> with just the corner, but my experience shows that if the mirror is a
>> piece of thick plastic and the one that doesn't work as well (It
works,
>> just dimmer pixels when the light is off) is a very flexible piece of
>> plastic foil. You'll know by pulling the corner off. If it is thick,
go
>> for it. if it is thin, you may want to think about it. Try it if you
get
>> a panel. I charge $40 for the whole job (it has to cover the cost of
the
>> LCD panel I took apart). I got it from ALL electronics, but they
>> nolonger sell it, so it is kindof my last priority. I have enough for
4
>> calcs, and will need 2 or three for myself, so you, austin, and I
could
>> end up being the only person with these backlights unless someone had
>> the misfortune of ordering the wrong LCD or thinking they could use
it,
>> but couldn't. I was on an LCD list before, so maybe I can purchase
some.
>> It would be best to find a black ON white backlit screen. It would
look
>> better, but I havn't found one yet.
>>
>> If you want it done, I can do it for you. I could send the piece (fit
it
>> to my 82 first) but It is difficult and requires patience. I have
taken
>> over half an hour just cutting the screen off, cause you obviously
can't
>> crack it, and you can't cut those plastic ribbon wires. Tell me what
you
>> want to do. I'll do my TI-82 before I do your TI-82, just to see if
it
>> works well!
>>
>> Respond soon!
>>
>> Richard Piotter
>>
>> E-Mail:
>> richfiles1@hotmail.com
>> richfiles@usa.net
>>
>> The Richfiles:
>> <A
>>
HREF="http://www.geocities.com/SiliconValley/Lakes/5081/Richfiles.html">The
>> Richfiles TI Page</A>
>> <A
HREF="http://www.geocities.com/Area51/Lair/8510/Richfiles.html">The
>> Richfiles Model Building Page</A>
>>
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