This is showing your router's signal. It doesn't clearly indicate whether your internet get disconnected or not. Check your internet connection, you can try connecting the internet cable directly to PC.
Probably your ISP only set connection to your router. This is possible as whenever ISP give you connection they can bind the device's MAC address and only that device can connect to the internet. I'm guessing they did this to your router, as a result only your router can get direct access to the network. Your devices are okay, contact with your ISP to solve this issue.