Many users who like to read e-books are very envious of having readers such as Kindle. The black and white e-ink screen saves power and protects the eyes. It is very pleasant to read books for a long time. In fact, our mobile phone can also change to a black and white "ink screen" in seconds, bringing a different visual experience.
First, we need to enter "System→Settings→About Phone" and click on the version number to activate the developer mode. Then enter the developer options and find "simulated color space".
Click this option and set it to the "full color blindness" mode, you will find that the entire phone screen loses its color and is displayed in only black, white, and gray. The overall visual effect is very similar to the ink screen.
It should be noted that this setting can only get a look and feel similar to the ink screen, but it does not have the characteristics of the ink screen that does not hurt the eyes (the screen will still emit blue light), and you need to pay attention to rest after reading for a long time.
Relatively speaking, the "full color blindness" mode is more suitable for environments with dim brightness at night, and it can be used to reduce eye fatigue to a certain extent when the screen brightness is appropriately reduced.
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