Searching \ for '[OT] EL Backlit LCD' in subject line. ()
Make payments with PayPal - it's fast, free and secure! Help us get a faster server
FAQ page: www.piclist.com/techref/lcds.htm?key=lcd
Search entire site for: 'EL Backlit LCD'.

Exact match. Not showing close matches.
PICList Thread
'[OT] EL Backlit LCD'
1999\09\08@181206 by Wesley Moore (Yallara)

flavicon
picon face
Hi All,
I have just bought an LCD with EL backlighting. The datasheet doesn't seem to
mention anything about how to power the backlight, if it is switchable at all.
I was wondering if anyone knew anything about the functionality of EL
backlights on such LCD's. I haven't yet fired it up, so I'm assuming it's
not on all the time.

Wesley

1999\09\08@182251 by Dan Larson

flavicon
face
I have some of those too.  Supposedly, they can be driven
directly from 120Vac!, although that kind of makes me
nervous.  The LCD board would burn up real fast if
the EL backlight terminals became shorted to the
main LCD board.

They act like a capacitor.   I'm told that they like to
operate around 400hz or so best.  Electronics Now just
did a write-up on them.

For other than just experimenting, a proper EL driver is called for,
but don't ask me about those... But you will get much better
efficiency especially if driven from a battery.

On Thu, 9 Sep 1999 08:10:14 +1000, Wesley Moore (Yallara) wrote:

>Hi All,
>I have just bought an LCD with EL backlighting. The datasheet doesn't seem to
>mention anything about how to power the backlight, if it is switchable at all.
>I was wondering if anyone knew anything about the functionality of EL
>backlights on such LCD's. I haven't yet fired it up, so I'm assuming it's
>not on all the time.
>
>Wesley
>

1999\09\08@182301 by paulb

flavicon
face
Wesley Moore (Yallara) wrote:

> I have just bought an LCD with EL backlighting.  The datasheet doesn't
> seem to mention anything about how to power the backlight, if it is
> switchable at all.

 From Vorlac by any chance?

 Gotcha!  The backlight connection is two pads, separate from the main
ones (for protection).  You need a power converter for the backlight,
this is generally *extra*.  How you switch it is your own determination.

> I was wondering if anyone knew anything about the functionality of EL
> backlights on such LCD's.  I haven't yet fired it up, so I'm assuming
> it's not on all the time.

 They work.  They have a limited lifetime in the order of 1k hours.
That's why on the alarm consoles and such, they are not on all the time.
In practice, E-L backlights are more-or-less *obsolete*, if you want to
make something serious you use LED backlit modules.  Far cheaper, more
durable and easier.
--
 Cheers,
       Paul B.

1999\09\09@100213 by Wesley Moore (Yallara)

flavicon
picon face
Thanks a lot, I'll have to check out those VFD's they sound interesting.

Wesley

On Thu, 9 Sep 1999, Paul B. Webster VK2BZC wrote:

{Quote hidden}

1999\09\09@192146 by Jerry Iacobucci

flavicon
face
Where did you purchase the VFD Displays?

Do they have a web site.

Thanks

Jerry

1999\09\09@193638 by paulb

flavicon
face
Wesley Moore (Yallara) wrote:

> Thanks a lot, I'll have to check out those VFD's they sound
> interesting.
> Wesley
> On Thu, 9 Sep 1999, Paul B. Webster VK2BZC wrote:

 Blow it!  Did I go and send that to the list?
--
 Cheers,
       Paul B.

1999\09\09@193843 by paulb

flavicon
face
Jerry Iacobucci wrote:

> Where did you purchase the VFD Displays?

 OK, looks like I *did* send it to the list!

> Do they have a web site.

 http://www.vorlac.com.au  It's not very friendly though.  In fact,
it's quite muddled.   You'll see!
--
 Cheers,
       Paul B.

More... (looser matching)
- Last day of these posts
- In 1999 , 2000 only
- Today
- New search...