What is the difference between "Screen On" and "Awake"? I can possibly understand why the phone can be Awake without having the screen on (background stuff), but how can the screen be on without it being awake?



If relevant my device is the Nexus 4 running Android Jelly Bean 4.3.
This part of your screenshot you can find explained (partly) in my answer to What is Cell standby and how can I keep it from eating my battery?. But more specifically to your question, here's what it is about:


Network signal: Quality of the signal (colors are explained in this answer)
GPS on: Whether GPS was actively used
Awake: some app requested a Wakelock (see: How to deal with (orphaned) WakeLocks?). At least that's the best logical explanation to your question, though I cannot name a reference for that.
Screen on: the screen was turned on (either manually by the user, or automatically by an app). If the user turns the screen on, that doesn't necessarily mean a wake lock being aquired.
Charging: a charger was connected and supplied the device with energy