After this tedious step, he designed a PCB that hosts an Arduino Nano to accept input, two MCP23017 GPIO expanders to give it enough outputs, and CD4066BE CMOS switches to trigger the connections.

And while it’s not without flaws (poor battery life being the biggest), it’s a solid evolution. We loved the larger 7.9in 1080p LCD screen. No OLED here (yet), but the bump to 120Hz and HDR support ...

The main takeaway is that QLED is closer to regular old LCD than it is to OLED, which I (and most other experts) consider a distinctly different class of television, much like plasma before it.