How to make Samsung Tab 2 10.1 screen always on? In settings, they only give 15 secs to 30 mins options. But in my scenario, I need make it like an ads screen to present information forever, until the screen dead. 

Is there any way to achieve that? Do I need unlock the bootloader?
Download tasker from play store

Import the following task to tasker (save as .xml ) and then import

Download tasker task.

You will get the following screen on time 
23 hrs 59mins 59 secs

Put a profile to run everyday, so it gets repeated everyday.