How to reduce the brightness on the Xiaomi TV: all the ways from simple to hidden

You just turned on the new Xiaomi Mi TV 4S or Redmi Smart TV X Series, but does the picture blind your eyes even in the evening? Or did the brightness automatically go down after the firmware update? The problem of over-lighting is familiar to many owners of the brand’s smart TVs – especially if you use the device in a dark room or to watch movies with dark scenes.

In this article, we’ll look at all the possible ways to reduce brightness on Xiaomi TVs, from basic settings through the remote to hidden engineering menus and calibration via ADB. You’ll learn why automatic adjustment sometimes doesn’t work properly, how to bypass firmware restrictions, and what to do if brightness settings are blocked. And at the end, answers to frequent questions, including screen flickering problems after changing brightness on models from 2023 to 2026.

1. Basic brightness setting via remote control

The most obvious way is to use the standard TV menu. On most Xiaomi models (including the Mi TV Q1E, Redmi TV A2 and Mi TV P1), the path to brightness settings is the same, but may vary slightly depending on the PatchWall version.

Here's the step-by-step instruction:

• 📺 Press the Settings button on the remote control.
• 🖥️ Go to the Display & Sound section → Picture (or Screen and Sound) → Image in Russian firmware).
• 🌓 Find the Brightness slider – it’s usually located at the top of the list.
• ➖ Reduce the value to a comfortable level (recommended range: 30-50% for home use).

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⚠️ Note: On some models (e.g. Mi) TV 4A with firmware below 2.0.186), the brightness slider can be locked in Sport or Game modes. Switch to Standard or Movie before setting up.

If the brightness changes, check the Backlight setting, which is responsible for the intensity of the LEDs, not the software processing of the image. Optimal ratio: Backlight = 60-70%, Brightness = 40-50%.

2. Hidden brightness settings in the engineering menu

If the standard settings don't offer enough flexibility, you can use the engineering menu, which is suitable for power users and allows you to calibrate the screen more accurately, but you need to be careful - incorrect changes can lead to image crashes.

To open the engineering menu on Xiaomi TVs:

1. Turn on the TV and go to any channel or menu.
2. On the remote control, quickly press the sequence: Menu → Up. → Up. → Down. → Down. → Left. → Right. → Left. → Right (some models have a Menu combination) → 1147).
3. You can find the Factory Menu section of Picture Settings or Backlight Control.

In the engineering menu you will find additional parameters:

⚠️ Warning: Changes to the engineering menu are not saved after the firmware update. OTA-update, all parameters will be reset to factory. To avoid this, write down the current values on paper or take a picture of the screen.

3. Brightness adjustment via the Mi Home app

If you have an Android or iOS smartphone, you can control the brightness of your TV through the official Mi Home app, which is convenient when the remote is lost or not working, and also allows you to create automation scenarios (for example, reduce brightness in the evening).

Instructions:

• 📱 Install Mi Home from Google Play or App Store.
• 🔗 Connect your TV to the same Wi-Fi network as your smartphone.
• 🔍 In the app, click Add Device → Television and follow the instructions for pairing.
• ☀️ After connecting, go to the TV card, select Screen Settings. → Brightness.

In Mi Home, additional options are available:

• 🌙 Night mode: automatically reduces brightness and blue light after sunset.
• 🎮 Game profile: Optimizes brightness for dynamic scenes (good for Xiaomi) TV Stick or when connecting the console).
• 🔄 Schedule: You can program the brightness change over time (e.g., from 100% during the day to 30% at night).

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⚠️ Note: In some regions (e.g. Europe) the Mi Home TV functionality is limited due to the requirements of the Mi Home TV. GDPR. If the app does not have a screen settings section, upgrade your TV firmware to the latest version or use alternative methods from this article.

4. Brightness calibration via ADB (for advanced users)

If you want the best possible accuracy (for example, for professional color correction or using your TV as a monitor), you can use the ADB (Android Debug Bridge) method, which requires a PC and basic command line knowledge.

Step-by-step:

1. 🖥️ Install Platform Tools on your computer.
2. 🔌 Turn on the TV to debug. USB: Go to Settings. → On TV. → Software version. Press the Software version 7 times until you have a message that says you're a developer. Go back to Settings. → Additionally. → For developers and enable debugging by USB.

USB 3.0

cmd

adb devices

If the TV is displayed in the list, follow the command to change the brightness (value from 0 to 255):

adb shell settings put system screen_brightness 100

For more subtle settings, you can use commands:

• 🔦 The brightness of the backlight: adb shell echo 50 > /sys/class/leds/lcd-backlight/brightness
• 🎨 Change gamma profile (root rights required): adb shell setprop persist.sys.gamma 2.2

1. Enable Wi-Fi debugging in the developer settings.
2. Run on the PC adb tcpip 5555.
3. Connect by IP: adb connect 192.168.x.x:5555 (you can find IP in the settings of the TV network).

⚠️ Note: Change of parameters through ADB It can cause the TV to work in an unstable way if the values are incorrect. screen_brightness 0 Make the screen completely black, and returning to factory settings will require resetting via Recovery.

5.Brightness problems after firmware update

Many users of Xiaomi Mi TV 5 Pro and Redmi Smart TV X55 are faced with the fact that after updating the firmware brightness is reduced to a maximum, and the slider in the settings becomes inactive, this is due to a bug in the firmware PatchWall versions 2.1.100-2.1.120.

Here's how to solve the problem:

• 🔄 Firmware rollback: If the update is installed recently, you can return the previous version through Recovery. To do this: Download the desired firmware from xiaomifirmware.com. Place the file update.zip flash-drive FAT32. Insert the flash drive into the TV, pinch the Menu + Volume Down on the remote and turn on the power.

Reset to factory:

Settings → System → Resetting settings

Attention:

Manual patch:

/system/build.prop

ADB

ro.vendor.display.brightness_hal=1

(requires root).

If none of these methods worked, check if Auto Brightness is activated (may be hidden in Settings → Special Opportunities → Adaptive Brightness) and some models are in conflict with manual settings.

💡

Before rolling back the firmware, be sure to check the compatibility of the version with your TV model. Installing firmware from another model (for example, from Mi TV 4X to Redmi TV A65) will lead to a "brick" of the device!

6.Alternative ways to reduce eye strain

If the dimming doesn’t help (for example, due to the matrix or firmware), try these methods:

• 🌡️ Warm color profile: In image settings (Picture) → Color Temperature) Choose Warm or Custom with a reduction in the blue channel.
• 🔳 Reading Mode: Some firmware has a Reading Mode option (included in Settings) → Screens that reduce brightness and increase text contrast.
• 🖥️ External LED filter: Physical anti-reflective films (e.g, 3M Privacy Filter: Decrease brightness by 20 to 30% without changing the settings of the TV.
• 🌑 Nightglasses: If the TV is used as a PC monitor, set up Night Light in Windows or f.lux to automatically reduce blue light.