Before going into the actual topic, Lets know something about
BLUE LIGHT.
Firstly, the smartphone screens, other displays units and even Sunlight etc. emit BLUE LIGHT.
BLUE LIGHT which is high intensity(380-500)nanometer which during day time which will not affect that much but during night time if you use smartphone or other device beyond recommended level/ time it may possibly cause to fall asleep and at night expose to BLUE LIGHT may effect MELATONIN a harmone that is linked to wake-sleep cycle.More exposure to BLUE LIGHT may even cause damage to eye's retina.
So, to over come those side affects to some level AMOLED diplays were introduced.AMOLED displays reduces exposure to BLUE LIGHT without compromise in the picture quality.Since AMOLED don't light up black so there is possibility of saving BATTERY CHARGE also.
What is blue light filter?
BLUE LIGHT filter decreases the amount of blue light displayed on the screen of a device. Blue lighter filter may be more effective in night time than in day time.
NOTE:
But blue light filter may not be applied while watching HDR videos from HDR exclusive video series.
BLUE LIGHT filter is available in some devices running on android 7 or above.Others who do not have blue light filter on their device may download it from play store.
