I needed a small display for my fridge, but couldn't find the perfect one (besides in some places these are damn expensive) and I wondered how a printed seven segment display would work? The answer is that the printed display works very sweet!
As an extra bonus notice in the openscad code that I adapted most of the led sizes based on a logaritmic and quadratic formula (to define the led height and flange size based on the diameter) rather than hard-coding every set of parameters, quite nice eh?
Customize the module, fit your leds (no glue needed but you could block the back residual light with some dark silicone,), connect all the anodes or cathodes and use as an off the shelf module, enjoy!
For an added bonus stack them to create a larger display.
The diffuser layer is just a thin printed layer that should allow light to pass thru (and the extra one is just in case the leds emit a very focalized point of light).
In my actual thingomatic printer the 0.3 layer height generates 1 layer of plastic (perfect translucency) but check your own slicer/printer limits to get a nice print.