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 <[email protected]> wrote: > On 2016-Jul-20, at 12:52 PM, Ian Finder wrote: > > > 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.) > > -- Ian Finder (206) 395-MIPS [email protected]
