[chbot] LED displays coloured filters

[Peter Ellens]

something like 
https://www.aliexpress.com/item/Hot-12pcs-Colorful-Strobist-Flash-Color-Lighting-Gel-Pop-Up-Filter-Diffuser-Lighting-for-Lighting-Effects/32457417936.html

On 13/01/17 20:21, Volker Kuhlmann wrote:
> It has become obvious with my display experiments that the appearance
> and conttrast of LED displays is significantly improved by the use of
> colouored filters. That's why commercial clocks etc always have a dark
> tinted front panel - it transmits the display colour but blocks the
> background, significantly increasing contrast and readability.
>
> Has anyone come across coloured tinted translucent plastic foils? I have
> a feeling I've seen them a long time ago.
>
> I'll need them in blue, pure green (not yellow-green), dark yellow, and
> red, and would appreciate a note if someone happens to have seen
> something like this, before I trawl all the shops...
>
> Thanks,
>
> Volker
>
> I'll have it with me on Monday.
>