Android Tablet with Screen Stream Mirroring application installed. WiFi connection on same network from Android Tablet running personal Hotspot to laptop. Laptop video output via HDMI cable to LED Screen. Done! Tablet and laptop must be fairly close to make sure WiFi personal hotspot can connect and has stable signal. If you use this method I would setup Screen Stream Mirroring to stream to a URL and then install VLC on the laptop and VLC connect to the URL that is being provided.
Pro's - No pesky cables to worry about tripping over or coming undone.
Cons - Must purchase tablet with HDMI video output.
WiFi can be spotty at a distance with personal hotspot signals on phones and tablets.
Hardwired:
Laptop with HDMI output like Nvidia Shield K1 - Output from long HDMI cable directly to LED Screen HDMI input. Hardwired!
Pro's- Hardwiring will provide less chance of lost video feed due to WiFi disconnection. Stable video feed.
Con's-
Must purchase tablet with HDMI Video output.
Less mobility depending on length of HDMI cable. Tripping hazard. Cable pulls out unexpectedly.