Xiaomi’s modern smartphones have become an integral part of our lives, and many users spend a significant part of their time behind the screen, especially in the evening. Night mode is not just a function of reducing brightness, but a set of software solutions designed to minimize the load on vision and not disrupt the circadian rhythms of the body. MIUI and HyperOS devices often confuse reading mode, dark theme mode and automatic brightness control, although each of these elements plays a role in the comfort of using the gadget after sunset.
Understanding how the blue light filter works and when to activate it can significantly improve sleep quality. Standard brightness in the dark can cause spasms of accommodation and headaches, so Xiaomi engineers have implemented flexible image adaptation algorithms. In this article, we will discuss in detail all aspects of night use of the smartphone, from basic settings to hidden features of the system.
The principle of operation of the blue light filter in MIUI
The basis of the night mode in Xiaomi smartphones is software filtering of the spectrum of radiation matrix. IPS and AMOLED screens emit light in a wide range, including the high-energy blue part of the spectrum. These waves are most strongly scattered in the eye and suppress the production of melatonin, the hormone responsible for falling asleep. Reading mode, often called nighttime, shifts color temperature to a warm, yellowish area.
MIUI allows you to adjust the intensity of this effect. You can choose to tint lightly or to tint as warm as possible, resembling the color of old paper. This is especially true for models with high-frequency PWM adjustment, where an additional warm filter makes the picture more natural with low light levels. It is important to note that this feature does not affect the application, but only changes the final color display.
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For maximum eye comfort, try the combination: turn on Dark Theme in the system and set the reading mode to a minimum intensity.
Note that filter activation can distort the color reproduction of photos and videos. Therefore, for multimedia content, the system often offers a temporary shutdown or automatic adaptation. On some models with DC Dimming technology, night mode also helps to smooth out the flickering of the screen at minimum brightness, which is critical for people with increased eye sensitivity4.
How to turn on and set up an automatic schedule
Manually turning on functions every evening is inconvenient, so Xiaomi offers a flexible automation system. To activate night mode, you need to go to the display settings menu. Here you will find a switch that can be programmed in time or sunrise and sunset using the device's geolocation.
The schedule allows the system to determine when to change color temperature. The algorithm takes into account your location and time of year, which is especially convenient in regions with a large difference between summer and winter light days. You can set specific hours, for example, from 22:00 to 07:00, so that the mode is activated strictly according to your sleep schedule.
☑️ Setting up night mode
In Settings → Screen and Brightness → Reading mode, an intensity slider is available. You should not twist it to the maximum right away, as the image may become too yellow, which will cause the opposite effect of fatigue. The optimal balance is one in which the white background of documents becomes creamy, but the text remains contrasting and readable.
Dark theme vs. Night mode: what is the difference
Users often confuse Dark Mode and Reading Mode, although they are fundamentally different tools. Dark theme inverts the interface colors, making the background black and the text white. This reduces the overall glow of the screen and saves battery power on AMOLED matrices where black pixels are turned off. Reading mode changes color temperature by adding a yellow filter on top of any image.
Using these features simultaneously provides the best result for protecting vision in the dark: a dark theme removes the bright white background of applications, and a blue light filter softens the remaining glow. In HyperOS, these settings can be combined into automation scenarios, allowing the phone to switch between profiles on its own depending on the time of day.
| Characteristics | Dark subject matter | Reading mode | Avoir-brightness |
|---|---|---|---|
| Substantive function | Interface color inversion | Blue spectrum filter | Adjustment of illumination |
| Impact on the battery | Substantial (on AMOLED) | Minimum | Average. |
| Impact on colours | Changing the design of applications | Makes the image yellow. | It only changes the brightness. |
| Recommended time | Evening and night | Reading text, night | Anytime. |
It's important to distinguish between these concepts when setting up a device for children or people with visual impairments, and the combination of tools allows you to create the safest environment for using the gadget, but it's worth remembering that even with filters on, content and bedtime play a key role.
Paper text regime and additional functions
Recent versions of the MIUI have introduced a feature that mimics the texture of paper, which is not just a color change, but an overlay of light noise or texture, which reduces the contrast between the sharp boundaries between letters and the background. For many users, this mode is the most comfortable for long-term reading of books or news in the Mi Video app or browser.
It also has the ability to customize individual applications, and it can remember that you need the maximum warm filter for your reader, and it's better to turn it off to view photos in the gallery, through smart scripts or third-party applications that integrate with the system settings of the display.
⚠️ Attention: When using read mode in photo editing or design applications, color perception is impaired. You may not notice color errors in the image because you see it through the yellow filter. Always check the result when the mode is off.
Some Xiaomi models support Sunlight Mode with night mode, brighter and contrastier in the daytime, and softer in the evening, and the switching between these states should be smooth so as not to cause discomfort when looking at the screen.
Hidden possibilities of the engineering menu
Impact on autonomy and operation of AMOLED matrices
The use of night modes indirectly affects battery life. Because the blue light filter is often accompanied by a decrease in the overall brightness of the backlight, power consumption drops. On AMOLED screens, which are found in most Xiaomi flagships, black does not consume energy, so the combination of dark theme and night mode is most efficient.
But software overhead is important. Real-time color recounting can theoretically create microloads on the GPU, even though it's not noticeable on today's Snapdragon or Dimensity chips. More important, psychological comfort is the ability to less strain your eyes and, as a result, to complete your phone sessions faster.
- 🌙 Reducing brightness directly saves battery power.
- 🎨 Dark subject on AMOLED The screen can save up to 30% of energy.
- 👁️ Blue light filter does not affect battery consumption, but protects vision.
For users who read from their phone for hours, it is also recommended to pay attention to the frequency of the sensor survey. At night, some phones reduce the frequency of touches to prevent accidental taps, which is also part of the energy saving and comfort system.
Solution: If the regime doesn't work or dims
Sometimes users are faced with a situation where the night mode is turned on, but the screen remains too bright or, conversely, becomes unreadable. Often the problem lies in conflict with the autobrightness function. If the light sensor is covered with a cover or contaminated, it may not correctly assess the environment.
In such cases, it is recommended to calibrate the sensor or temporarily disable automatic adjustment by setting the brightness level manually, and it is also worth checking the system updates, since in early versions of MIUI there were bugs when the read mode was not applied to the system menus or notification windows.
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If after turning on the reading mode, the colors have become unnatural, reset the display settings to factory ones in the "Color Scheme" menu and recalibrate the reading mode slider.
Another reason could be the activated "Brightness" mode in games or when watching videos, which forcefully twists the backlight to the maximum, ignoring the night mode settings.
⚠️ Warning: Do not use third-party filter apps from Google Play if you have built-in system mode.They may conflict with display drivers, causing flickering or increased CPU heat.