iPad's screen goes black

Your iPad will automatically sleep (and lock the iPad) when you are not interacting with the screen - this being a feature intended to keep you personal and private information secure.

Consider changing your iPad’s Auto-Lock setting:

Settings > Display & Brightness > Auto-Lock - select from 2/5/10/15 minutes

Extending the auto-lock period should provide a longer period before the screen initially dims - and then turns-off.

Reply padraigeen ; iPad Screen Black

This article tells the what to do if your screen is black :

If your iPad won't turn on or is frozen - Apple Support

You are very welcome. I hope the provided information successfully addressed your need.