This article has good details on how the pixel refresher (or equivalent) runs. interesting things is some TVs  waits for few hours to run it after the TV is “aswitched off via remote”
	
	
		
			
				
					
						
					
				
			
			
				
					
						
							
						
					
					arstechnica.com
				
			
		
	
	
		
			
		
		
	
				
			
					
				Not burn-in: Scary OLED TV image retention may stem from “buggy” feature
TV compensation cycles can auto-fix the problem in minutes—assuming they run.
				
						
					
					arstechnica.com