[chbot] LED displays coloured filters

[Charles Manning]

I have used coloured cellophane from craft/stationery shops.

Works well.

On Fri, Jan 13, 2017 at 11:06 PM, Volker Kuhlmann <list0570 at paradise.net.nz>
wrote:

> On Fri 13 Jan 2017 22:20:50 NZDT +1300, Colin Isenman wrote:
>
> > You could consider a plain grey polarizing film instead of colour
> > filters. The polarization should significantly reduce reflections and
> > hence improve the contrast of the display. To be really slick, an
> > antireflective coating on top would be nice. But maybe not necessary
> > unless you want sunlight readable.
>
> In a bright sunlit room I find the white/grey background of the display
> front and the LED-segments when not lit to be close to indistinguishable
> from lit segments. Removing the light refelcted from unlit segments
> would go a very long way.
>
> I'm not sure the polarizing would help, because neither the LED light
> nor the ambient diffuse light is polarized, but it'd be worth a try.
>
> If someone has polarizing sheets like this, could they possibly bring
> one on Monday to hold in front of the display for comparison?
>
> Thanks Peter, I'll get some photo/flash filters if I can't find anything
> suitable in town.
>
> Thanks,
>
> Volker
>
> --
> Volker Kuhlmann
> http://volker.top.geek.nz/      Please do not CC list postings to me.
>
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