I've been doing bed rest for 5 years now. Ever since I started, I had an idea of how to use my laptop while laying flat but kept putting it off until last week and finally figured it out. I first thought of some sort of hasp-like hinge to do the job but after searching for different things, I found this mount on Amazon.
https://www.amazon.com/gp/product/B0...1?ie=UTF8&th=1
I figured that it would need to be adapted but wasn't sure just how much until I got it and tried it.
Anyhow, it came in and was a little tricky to adjust, so I drew up a design and my dad took it partly apart and reconfigured it. It now works excellently while sitting up or when flat. I can't reach my mouse clicker switch very well when flat so I use my homemade sip-and-puff switch when laying down.
Its a little difficult for one person to adjust it from one angle to the other but not impossible and frankly I'm glad because I don't worry about it falling on my head in the middle of the night.
If you have any questions, let me know...