Just been looking at making up a smart mirror and intend on using a Raspberry Pi with a laptop LCD screen.
I intend on using the following parts:
Window Film Paper Insulation Stickers One Way Mirror:
https://www.amazon.co.uk/gp/product/B01HLRXZCO/
GENUINE LG 17.1" LCD CCFL LAPTOP SCREEN DISPLAY GLOSSY LP171WP4 (TL)(R4)
http://www.ebay.co.uk/itm/172589039356
HDMI+DVI+VGA LCD LED Screen Controller board Converter Kit for LP171WP4(TL)(N1)
http://www.ebay.co.uk/itm/162382181142
12V 1A AC/DC Adapter Charger Power Supply
http://www.ebay.co.uk/itm/201472545453
I will then use some wood (possibly an old photo frame) to size up the mirror and tidy up with 3D printed components / duck tape.
Has anyone else done this the same / a similar way, and if so what difficulties did you encounter?