Maelmoro

If you enable the auto-brightness iPad should turn the brightness down
or up depending on brightness all around.

However in my opinion it doesn't work, or it works not too much: try
to turn the light off in your room, then iPad should turn the
brightness down, but it seems (almost) the same.

My Panasonic TV has an excellent auto-brightness, infact you can see
so good the automatic regulation if you turn off the light in the
room.

So strange..