This single digit display is an old edge-lit module that [Ty_Eeberfest] has been working with. The modules were built for General Radio Company and have a really huge PCB to control just one digit.

Thin LCD-LED TVs are appealing because they’re easy to find space for and are aesthetically pleasing. To stay slim, most thin TVs, like Samsung’s The Frame pictured above, use edge-lit backlights. But ...