Lying on the bed, looking at the ceiling, feeling that the day is just like this, it is inevitable that the day will end a little unwillingly, simply play with the mobile phone, look at some things that cannot be seen during the day, and then... Then I couldn't sleep anymore.
Not being able to sleep at night is not only a psychological and physiological factor, but also has a certain relationship with your mobile phone. According to reports, as long as the optic nerve cells are stimulated by blue light for 8 minutes, they will continue to excite the body for more than 1 hour, causing chaos in the biological clock. If you use your mobile phone excessively before going to bed, it will cause people to have problems such as difficulty falling asleep and delayed time to fall asleep.
It's like saying that every day before going to bed: be sure to go to bed early today. As a result, I put down my phone and looked at it, it was dawn, and the vigil champion belonged to yes. The best habit is, of course, not to play with the phone before going to bed, and to sleep upside down, but if we can't put the phone down, then we have to play the phone in the right position.
Turn on DC dimming
This recommendation is mainly for OLED screen mobile phone users, now OLED screen mobile phone mainly uses DC + low frequency PWM dimming strategy, mobile phone screen only in the middle and high brightness is DC dimming, low brightness is more eye-hurting low frequency PWM dimming.
Due to the low frequency of this dimming method, the frequent movement of human eye muscles is not only easy to lead to fatigue, but also has a certain damage to vision over time. If you have sensitive eyes, you may be prone to physiological problems such as headaches, nausea, and visual disturbances.
In a low-light environment, the automatic brightness setting of the mobile phone will reduce the brightness, so that the screen brightness is in line with the current environment, which is also considered for the comfort of the glasses, so it is recommended to open the "DC dimming mode" in the mobile phone under this low brightness, sometimes referred to as the "anti-strobe switch", to reduce the harm to the human eye due to strobe.
And one thing to make clear is that the eye protection mode and the "anti-strobe switch" are two concepts, the former is the target of the screen blue light, the latter is the strobe. Not only for daily use, but also pay attention to this problem when purchasing a mobile phone. Anti-strobe switch or DC mode can generally be found in settings - eye protection mode or "Lab Function".
Some netizens said that the reaction to turn on DC dimming will affect the color accuracy of the screen, but now the screen will go through color correction before leaving the factory, even if the color accuracy has an offset is also within the acceptable range, and it can be restored after closing.
At this time, some students asked, what if my mobile phone does not have an anti-strobe switch or DC dimming?
Turn on dark mode
Starting from 2021, the mobile phone screen, especially the screen of the flagship mobile phone, has a more immoral setting - full brightness low-frequency PWM dimming, regardless of brightness, will not change their own dimming method, and there is no DC dimming mode.
So how to judge this kind of screen?
Left: Low frequency PWM dimming Right: DC dimming after turning on anti-strobe dimming (shutter 1600)
Quite simply, you go to another phone, set the camera shutter above 1000 in Pro mode, and point the lens at the screen of your phone. And then. You can try to adjust the screen brightness manually, if you find that no matter how you adjust, you can see a few "big black bars" on the screen that will move, which is basically low-frequency PWM dimming. Although this method is a bit rough, it can be seen in general.
If your phone's screen is dimmed in this way, it is recommended to turn on the dark mode of your phone. Because the essence of PWM dimming is a change in brightness, it is the most obvious when displaying white, then you only need to change the phone to a dark color (dark mode) to greatly reduce the depth of fluctuations and reduce the strobe hazard.
Further, if you don't like the black interface, put a desk lamp at the head of the bed to increase the brightness of the environment. Because when the screen is high brightness, the strobe is relatively less serious, and the ambient light is bright enough to reduce the impact of OLED strobe.
Or rely on self-discipline
The two methods mentioned above are essentially to alleviate the damage of the screen to the human eye, and the real healthy sleep is still that sentence - don't play with mobile phones.
I know it's hard, but it's the same as exercise, or rely on self-discipline, if you can't do it, you may wish to use the "screen health time" function in the phone, if the use of time is too long, the function will remind you, limit your screen use time, or paste a note at the bedside "Go to bed early today" to give yourself a psychological hint.
As for the problem of mobile phones, it is recommended that in the future purchase, give priority to mobile phones that support DC dimming or high-frequency PWM dimming, fortunately, mobile phones that support these two dimming methods will increase this year. When the mobile phone screen can not open the gap in color accuracy, brightness, color gamut, perception, etc., the performance of eye protection should be more valued by you and me.