Re: TI-H: Backlight
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Re: TI-H: Backlight
When you peel off that gray "mirror" from your LCD and compare it to the EL
panel that I use. You can't tell a difference. When it is off, everything looks
like a stock calculator. When the unit is on, it looks like an indiglo watch.
You just have to adjust the contrast a little to make up for the extra light.
It actually looks damn good.
Richard Piotter wrote:
> 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>
> >>
> >> ______________________________________________________
> >> Get Your Private, Free Email at http://www.hotmail.com
> >
>
> ______________________________________________________
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