A50s Screen is dimming !

[NewuserA50s]

My Screen white background  is lightened but the Status Bar is normal white.

Cant Explain  see in pics .

I have to restart after  that it becomes to normal but after hours  or two same thing occurs

[hedgehog]

try the factory reset and update your apps and clear phone cache from recovery mode

[hedgehog]

press power and volume up button till logo appears then go to wipe cache and then select wipe data factory reset
https://www.ubergizmo.com/how-to/boot-android-recovery-mode/

[NewuserA50s]

Will give it a try !