<div dir="ltr"><div>I have used coloured cellophane from craft/stationery shops.<br><br></div>Works well.<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Jan 13, 2017 at 11:06 PM, Volker Kuhlmann <span dir="ltr"><<a href="mailto:list0570@paradise.net.nz" target="_blank">list0570@paradise.net.nz</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">On Fri 13 Jan 2017 22:20:50 NZDT +1300, Colin Isenman wrote:<br>
<br>
> You could consider a plain grey polarizing film instead of colour<br>
> filters. The polarization should significantly reduce reflections and<br>
> hence improve the contrast of the display. To be really slick, an<br>
> antireflective coating on top would be nice. But maybe not necessary<br>
> unless you want sunlight readable.<br>
<br>
</span>In a bright sunlit room I find the white/grey background of the display<br>
front and the LED-segments when not lit to be close to indistinguishable<br>
from lit segments. Removing the light refelcted from unlit segments<br>
would go a very long way.<br>
<br>
I'm not sure the polarizing would help, because neither the LED light<br>
nor the ambient diffuse light is polarized, but it'd be worth a try.<br>
<br>
If someone has polarizing sheets like this, could they possibly bring<br>
one on Monday to hold in front of the display for comparison?<br>
<br>
Thanks Peter, I'll get some photo/flash filters if I can't find anything<br>
suitable in town.<br>
<br>
Thanks,<br>
<br>
Volker<br>
<span class="im HOEnZb"><br>
--<br>
Volker Kuhlmann<br>
<a href="http://volker.top.geek.nz/" rel="noreferrer" target="_blank">http://volker.top.geek.nz/</a> Please do not CC list postings to me.<br>
<br>
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