TI-H: EL backlighting
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TI-H: EL backlighting
Huh? How do you get behind the LCD that way..?
On Thu, 2 Oct 1997, John Fraser wrote:
>
> Why not go thoughthe front? I have. The font is simply glued on. Make
> sure you don't pull hrd but sneak a knife along the edges and peal. This is
> their becuase ti knows that after a while dust can biuld up under the seal.
>
> ----------
> > From: Greg Hill <gregh@xmission.com>
> > To: ti-hardware@lists.ticalc.org
> > Subject: Re: TI-H: lots of ideas
> > Date: Wed, 1 Oct 1997 20:08:42 -0700 (PDT)
> >
> > On Wed, 1 Oct 1997, Bryan Christopher Turner wrote:
> > > >
> > > > I think that a better idea would be to skip the LED thing (tried it
> > > > already), and get an actual backlighting panel. I'm researching this
> > > > right now, I'll send updates when I make progress...
> > > >
> > > > I've looked into Indeglow panels of that size, they would be
> wonderful!
> > > Problem is that the screen unit is not separable from the backing
> without some
> > > serious hacking. The LCD screen is stuck to a foil backing and removal
> of the
> > > backing may damage the LCD (it's delecate). (BTW: I'm referring to a
> TI-92
> > > mostly)
> > >
> > > If anyone can find a way to separate the backing from the LCD, please
> let me
> > > know!
> >
> > There is a product sold as a night light that has an electroluminescent
> > panel (EL or Indiglo) in it. It is about 5 mm (if I remember correctly)
> > smaller than the LCD screen in each direction. It is about 1.5mm thick.
> >
> > The EL panel could be inserted behind the LCD panel, but it isn't very
> > bright when powered from 120 VAC. I suppose if you could get it up to
> > about 150 or 200 VAC it would be brighter, but will not last as long.
> > Supplying power to the panel is the biggest problem: how do would you go
> > about feeding it in there? Inverters exist which convert DC (like 5V) to
> > AC for the panel, but one big enough to supply power to the EL panel would
> > be rather large (and expensive.. about $15, I think).
> >
> > Getting the LCD off isn't particularly difficult, it just takes a while. I
> > used a razor knife (sometimes known as a utility knife) to cut the
> > double-sided foam mounting tape that holds my LCD to its circuit board.
> > Just be careful not to hit the ribbons, that'd cause a really bad day.
> >
> > --
> > Greg Hill
> > greg-hill@bigfoot.com
> > www.comports.com/link
> >
> >
> >
>
>
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