Of course, first I tried to control backlight by raspberry gpio. PIR send signal to raspberry, and by some python script open NPN bipolar tranzistor which turns backlight on.

But there was a problem with hight current, and any other problems.

In the invertor the are 4 cables: ground, brightness 3,1-3,5V, backlight 5V, power 12V.

Fortunately the backlight si possible to control via any voltage (not any, but 3V-12V is ok). The PIR has output 5V, so I connected the output from PIR directly to LVDS converter. Be carefull, you have to hook up the groud in raspberry and in LVDS!

Now I have there only foil (film), it was really cheap (20€) http://www.dcfix.cz/detail.php?kod=F3398050

But my wife don’t like this, because it isn’t real mirror and you are seeing things like in fog.

Now, I ask some glass companies for price offer and try the real mirror. The price is about 55€. http://glassolutions.cz/cs/produkty/mirastar-chromove-zrcadlo You can translate page via google translator.

Hi guys,

after 6 months I finally completed my mirror. I used IKEA LILLÅNGEN mirror.

Components:

• 14’’ LCD panel LP154W02 (from old HP notebook)
• LVDS controler http://www.ebay.com/itm/LP154W02-LP154WE2-LTN154MT02-B154SW01-V-0-screen-TV-HDMI-controller-board-KIT-/221989744241
• Raspberry pi 3
• HC-SR501 Infrared PIR Motion Sensor Module for Raspberry pi

Because LCDs high consumption I’d like to switching on/off LCD panel, but the boot up time is almost 8 sec, so the PIR is controling only backlight.

Here some photos. If you have any question, feel free to ask :)

https://goo.gl/photos/8mwrdMqRnGwHfEqa7