Summary

I designed this to act as a case for an AMOLED screen made by DFRobot. It is described here:

https://wiki.dfrobot.com/5.5%20Inches%20HDMI%20OLED-Display%20with%20Capacitive%20Touchscreen%20V2.0%20%20SKU%3A%20DFR0524

and sold here:

https://www.dfrobot.com/product-1893.html

I wanted to make it a general use case, and so added in mounting point on the rear and included a bracket, nut and bolt, and then a 90 degree turn mechanism. Multiple prints of these should allow for many mounting positions. I remixed or borrowed much of the mounting hardware from here https://www.printables.com/model/37231-mechanically-articulated-arm . There's more options there. Namely I shortened the bracket for my specific use.

I designed the case itself to be as thin/small as I could possibly make it, and for compatibility with as many micro-usb and hdmi connectors as I could.