Re: VFD Questions

["patricklidstone" <patrick@xxxxxxx>]

--- In ukha_d@xxxxxxx, Martin Greenwood <martin@p...> wrote:
> At 17:07 14/03/2003 +0000, Paul wrote:
> >I looked at the noritake-elec web site but the words 'burn-in'
made me
> >think VFD isn't the way I'd want to go. Is this a real problem? I
could
> >see me using it for security state etc, which doesn't change much
and
> >stays on-screen for long periods.
>
> VFD and EL do suffer from burn-in and reduced brightness.
> Some controllers have a brightness level, you can extend life by
running at
> less than max.
> In our products we blank display after 5 minutes of inactivity, but
with a
> security display this would not be so easy. Animating the text
would reduce
> burn-in.
> 5 year old panels are noticeably dimmer, but they still work so I
wouldn't
> worry too much.
> This is the trade-off, but they are much more readable than lcd.

A couple of comments:

- the SlimMp3 uses VFD displays, and they have not had any reports of
burn in apparently.

- legibilgity of VFD in terms of both viewing angle and contrast is
fantastic, much better than the various LCD technologies

- the nori VFD I have automatically dims if the display is static for
more than a minute or so. It shows no signs of burn in after a few
months use.

- do go for the biggest display you can afford/will fit in your
intended application. I find 20x2 too limiting to be of much use,
20x4 if you scroll one or two lines is a good compromise and still
fits in a double UK wall box.

HTH

Patrick


http://www.automatedhome.co.uk
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