25 Oct
2016
25 Oct
'16
9:16 p.m.
Update: I've swapped the displays and drivers around, and the "tunnel"
effect seems to be a property of the panel and not drive electronics.
Perhaps they are all high-hour examples?
Anyone here an electroluminescent display expert?
On Wednesday, July 20, 2016, Ian Finder <ian.finder at gmail.com> wrote:
--
Ian Finder
(206) 395-MIPS
ian.finder at gmail.com
No, I'm not convinced the EL repro isn't
a driver electronics issue.
I'm just a little confused about why the issue congregates at the edges
of the displays. Any ideas why that might be?
I may try swapping the panels around this evening if I am feeling brave.
On Wednesday, July 20, 2016, Brent Hilpert <hilpert at cs.ubc.ca> wrote:
--
Ian Finder
(206) 395-MIPS
ian.finder at gmail.com
On 2016-Jul-20, at 12:52 PM, Ian Finder wrote:
--
Ian Finder
(206) 395-MIPS
ian.finder at gmail.com
I have a few GRiD compass systems and some are
suffering from massively
decreased contrast on the edges of the displays:
[See the system on the left]
https://www.instagram.com/p/BIGGzUzgat-/?taken-by=tr1nitr0n
[Or this one:]
http://www.ripstick.com/USCM/images/Grid_Compass_1101_
Laptop_in_Box_002.jpg
Meanwhile, other EL systems I have- like my HP integral PC- haven't
succumbed to this.
I have seen similar issues on amLCD displays in my Tadpole, Toshiba and
other machines, so this is something we all may have to confront.
-------
I was wondering if the folks here had theories?
I'm thinking moisture (or air) might be leaking in from the edges of
the
glass panes, perhaps from a compromised seal-
sorry for the silly
picture
but you can see the composition of the display
here:
https://www.instagram.com/p/6BXaLBtSzd/?taken-by=tr1nitr0n
Does anyone know how one might prevent this from progressing- storage
tips?
Could it be reversed?
Better yet, does anyone have ideas on how to rapidly dehydrate the
display?
Perhaps there is even a way to re-seal them.
I think all two-glass-pane displays that don't have a vacuum may
eventually
succumb to this.
Perhaps it is just oxidation and not moisture, but I'd love to hear any
theories.
Are you convinced this is a panel problem rather than a driver
electronics problem?
In one picture it looks like the sort of thing that happens when you
have to turn up the brightness (for some types of display), resulting in
partial illumination in other areas of the screen.
I've never had opportunity to repair or work on EL flat-panel displays,
I'm not familiar with the driving techniques and requirements, so this is
just a query/guess. (I see it's an X/Y matrix drive scheme, but the
voltages & timing & phasing I don't know about.)