How to increase screen lighting on Xiaomi: from basic settings to hidden features

Xiaomi smartphone screen dims with time? the picture has become less contrasting, and the text is difficult to understand in the bright sun? The problem is not always in the wear of the matrix – most often the fault of the wrong brightness settings, activated energy saving mode or software limitations of MIUI. In this article, we will discuss 7 working ways to increase the screen illumination on Xiaomi, Redmi and POCO devices – from standard parameters to hidden engineering menus.

It’s important to understand that the maximum brightness on Xiaomi smartphones depends on the model. For example, the flagship Xiaomi 14 Ultra or Redmi K70 Pro support peak brightness up to 3000 nits, while the budget Redmi Note 12 is limited to 1200 nits. But even within one model you can squeeze more — if you know where to look. We tested all methods on current versions of MIUI 14/15 (including HyperOS for new devices) and weed out outdated tips that stopped working after the updates.

We warn you beforehand that some of these things require a superuser or a developer mode activation. If you're a beginner, start with the first three. ADB-commands and modification of system files.

1. Basic brightness setting in MIUI

To start with the obvious, check if the brightness is set to minimum manually, and in MIUI, the brightness control is hidden in two places:

• 📱 Notification panel: swipe down from top to bottom and find the brightness slider. If it's not there, tap the icon «⚙️» (set the panel settings) and add the element manually.
• ⚙️ System settings: Go to Settings → Display. → Brightness. You can also turn on/off auto-regulation here.

If the slider is already at its maximum, but the screen is still dim, the problem may be adaptive brightness, which analyzes the light through the sensor and automatically dims the backlight to turn it off.

1. Open the settings → Display → Adaptive brightness.
2. Transfer the slider to the “Off” position or reset the training settings (Reset button).
3. Restart your smartphone – sometimes changes are only applied after a reboot.

💡

If the adaptive brightness has turned off, use the Night Mode feature (Settings → Display → Night Mode) for comfortable reading in the evening.

On some models (such as the Xiaomi 13T or POCO F5), the display menu has an additional option “Contrast” or “Saturation”, raising these values will visually brighten the picture, although the physical backlight of the matrix will not change.

Disconnection of energy saving modes

One of the common causes of dim screens is activated charge saving, which is aggressive in MIUI, not only restricting processor performance, but also forcibly reducing brightness to 50-70% of the maximum.

• 🔋 Go to Settings. → Battery. → Energy saving regime.
• 🔄 Make sure you choose Performance or Balanced mode. Turn off Super Power Saving, which blocks maximum brightness.
• ⚡ If you use ultra-mode (on some models), deactivate it – it limits backlighting to 30%.

On HyperOS devices (such as Xiaomi 14 or Redmi K70), the power saving menu looks different.

1. Go to Settings → Battery and performance.
2. Select the “No Limits” profile.
3. In the "Additional" section, disable the "Limitation of Brightness" option (if any).

In the models with AMOLED-screens (for example, Xiaomi 12 Pro or Redmi) K60) Power saving mode can block Adaptive refresh rate, which indirectly affects brightness perception.

3. Checking the light sensor

If the screen spontaneously dims or the brightness jumps, the light sensor is to blame, and it's located next to the front camera, and it can get contaminated or fail.

1. Close the sensor with your finger (usually this is a small hole to the left or right of the selfie camera).
2. If the brightness has not changed, the sensor is defective or disabled in the settings.
3. Wipe the area around the camera with a dry wipe – sometimes it is enough to remove the dust.

To completely disable the sensor (if it fails):

• 🛠️ Activate Developer Mode: Go to Settings → About the phone and 7 times tap on the "Version" MIUI».
• 🔧 Back to Settings → Additionally. → For developers.
• 🔍 Find the option “Disable the light sensor” and activate it.

On some devices (e.g., the POCO X5 Pro), the light sensor can be calibrated:

1. Go to Settings → Display → Adaptive Brightness → Calibration.
2. Follow the instructions on the screen, placing the smartphone under different light sources.

⚠️ If the sensor is physically damaged (for example, after a phone crash), it will cost between 1,500 and 3,000 to replace it. ₽ On models with infrared sensors (for example, Xiaomi Mix 4), the cost of repair is higher.

4.Using hidden MIUI settings

V MIUI There are hidden parameters that allow you to increase the brightness above the standard maximum. ADB-team.

First, connect your smartphone to your PC and execute in the command line (cmd):

adb shell settings put system screen_brightness 255

This command is forced to set the brightness to a maximum of 255, the maximum value in Android. If there is no change, try:

adb shell settings put system screen_brightness_mode 0

This command disables automatic brightness control at the system level.

For models with HyperOS (e.g. Xiaomi 14), use an alternative method:

adb shell am start -n com.android.settings/.display.BrightnessPreferenceActivity

This will open a hidden brightness setting menu with extended options.

⚠️ Note: On some devices (e.g. Xiaomi Mi 11) after use ADB-When you reset, you reset your brightness. To record the changes, create a task in Automation. MIUI) Automatically apply the command when the screen is turned on.

5 Modification of system files (for advanced)

If standard methods don't work, you can manually edit the system files that are responsible for brightness, which requires root rights and is only suitable for advanced users!

Instructions for devices on MIUI 14/15:

1. Install Root Explorer or any other file manager with root support.
2. Go to /system/vendor/overlay/ and find the framework-miui-res.apk file.
3. Copy it on your PC and open it with APK Editor.
4. In a file. res/values/ find the file integers.xml and change the parameters: <integer name="config_screenBrightnessDoze">5</integer> <integer name="config_screenBrightnessDim">10</integer> Replace the values with 255 (maximum).
5. Save the file, overwrite it on your phone and restart the device.

For HyperOS, the path may be different: look for files in the /product/overlay/ or /vendor/overlay/. On some models (e.g. Xiaomi) 13) brightness limits the file power_profile.xml file /system/etc/ — You need to increase the screen.on.power setting.

💡

Editing system files without a backup can lead to a "bootloop" (locked boot).Always back up via TWRP before changes!

An alternative method is to use a Magisk module called Brightness Control, which allows you to set the brightness above the standard maximum without manually editing files. Install the module through Magisk Manager and restart the smartphone.

6. Virus testing and optimization

Rarely, it happens that the brightness of the screen is limited by viruses or optimizers installed from third-party sources, for example, some “cleaners” of cache (such as Clean Master) forcefully reduce the brightness, masquerading this as “charge savings”.

What to do:

• 🛡️ Scan for viruses using Google Play Protect or Malwarebytes.
• 🗑️ Remove suspicious applications, especially those that request permissions to “Change system settings».
• 🔄 Reset the Battery Optimization settings for all applications: Settings → Battery. → Optimization → Drop it.

On some firmware (such as custom LineageOS or PixelExperience for Xiaomi), brightness can limit the core of the system.

1. Installation of an alternative core (e.g., FrancoKernel for POCO F1).
2. Use Kernel Adiutor to manually adjust display settings.

If the problem has occurred after the MIUI update, try to roll back to the previous version via Fastboot or Recovery.For downgrade instructions, look for the thematic sections of the 4PDA or XDA-Developers forum.

7. Hardware problems and service center

If none of the software methods worked, the cause of the dim screen could be hardware.

• 💡 Degradation of backlight: over time LED-The matrix is losing brightness (especially on older models like Xiaomi Mi 9).
• 🔌 Problems with the plume of the display: after falling or repairing, the light connector could move away.
• 🔋 Battery wear: at low voltage (3.4V) the system forcibly reduces brightness.
• 📱 Damage to the matrix: AMOLED-screens can “burn out” pixels, which visually makes the image dull.

How to diagnose:

1. Connect your smartphone to charging – if the brightness has increased, the battery is a problem.
2. Light a flashlight on the screen at an angle - if you can see the image, but it is dull, the backlight is to blame.
3. Check the screen for broken pixels using the Screen Test app.

The cost of repairs in the service center Xiaomi:

⚠️ Note: If your Xiaomi is guaranteed, do not try to disassemble it yourself - this will void warranty obligations.

FAQ: Frequent questions about Xiaomi screen brightness