How to calibrate the screen Xiaomi Mi 9T: professional setting

Smartphone Xiaomi Mi 9T gorgeous AMOLED-It's a matrix that provides deep black and rich shades, but even high-quality panels can have factory variations in color reproduction that are visible to the naked eye. Many users notice that the white color goes yellow or, conversely, has a cold blue hue, which significantly affects the perception of content.

The Redmi K20 Pro screen calibration (the global version of the Mi 9T) is a process that allows you to adjust the display temperature and gamma curves to achieve maximum accuracy. Unlike budget models, an advanced set of tools is available for fine-tuning, but the standard menu often hides the possibilities from the average user. Understanding how your device's color engine works will help you get a studio-quality image.

In this article, we will take a look at all the methods available, from built-in MIUI functions to hidden engineering codes, how to safely change parameters without obtaining root rights, and why standard "reading modes" can interfere with correct color reproduction.

Diagnostics of the current state of the display

Before making any changes, we need to objectively assess the current situation. The human eye is highly adaptable, and we often stop noticing obvious distortions in colors after prolonged use of the device.

Turn on any white image or open a browser with a white page. Pay attention to the corners of the screen: if there is a noticeable greenish or pink tide on the edges, this can be a feature of AMOLED technology, the so-called "mura" effect or uneven backlighting. In the case of the Xiaomi Mi 9T, the panel is usually free of serious defects, but the temperature balance can be disturbed.

⚠️ Warning: Don't confuse software calibration with physical pixel burnout. If there are permanent icon or keyboard marks on the screen that don't disappear when you change the picture, the software methods are powerless - that's the physical wear and tear of the matrix.

To make a more accurate diagnosis, you can use specialized test images. Upload a gray scale photo and check if details are lost in light and dark areas. It's also important to check if you have Night Light enabled, which automatically adds a warm filter in the evening, distorting real colors.

Standard MIUI settings for color correction

The MIUI shell provides basic color profile tools that are available right out of the box. This is the first step to start (optimizing) an image without having to resort to complex manipulations. Go to the Settings menu → Screen → Colors and saturation.

Here you'll see a few (preset) modes. Standard Mode is usually closest to sRGB color space, making it a preferred mode for web browsing and document processing. Vivid Mode artificially upsizes saturation, which many users like, but distorts the actual colors of photos.

Inside each mode, additional color temperature settings are often available. The slider allows you to shift the balance from cold blue to warm yellow. To calibrate the Xiaomi Mi 9T, it is recommended to set the slider to a neutral position if you are not using the device in specific lighting conditions.

It's important to understand that standard settings affect the entire color gamut globally, and if you choose a warm hue, both red and green channels will shift, which is a rough setting that doesn't allow you to adjust individual colors, but it's safe and reversible at any time.

Using the CIT Engineering Menu for Deep Customization

For more advanced calibration, Xiaomi smartphones have a hidden CIT (Customer Integration Test) engineering menu designed for factory testing, but it contains useful features for testing and resetting display parameters, accessed through a set of special code in the Phone app.

Type ##6484## into the dialer. You can open the test menu. You can find a item associated with Display or Color. You can run a cyclic test of the display of primary colors (Red, Green, Blue, White, Black), which helps to identify broken pixels or uneven backlights that you can not see in a static picture.

##6484##

In some firmware versions, you can recalibrate the screen to factory values through this menu if previous settings were corrupted by third-party apps. However, beware: this menu is designed for engineers, and changing unknown parameters can lead to incorrect touchscreen operation.

⚠️ Attention: In the engineering menu CIT Don't change the values of parameters that you don't understand, recalibration can cause the screen to become too dim or take on an unnatural shade that is difficult to fix without flashing.

Use of the CIT-The menu is a great way to make sure that the hardware of the matrix is working before the software correction. If you see obvious spots or stripes on a white background in test mode, no software calibration will help - you need to replace the module.

Calibration through ADB and third-party utilities

The most accurate result is the use of the command line. ADB (Android Debug Bridge or specialized applications that require debugging permission USB. This method allows you to change the color temperature values in a wider range than the standard menu. To work, you need to turn on Developer Mode and activate Debugging by Debugging. USB».

One of the popular solutions is to use commands to change values. white_balance. If you connect your phone to your computer, you can send commands that force you to change the white balance, for example, commands like service call can affect the display drivers, but the syntax of commands depends heavily on the version of Android and the processor (Snapdragon). 730 mi 9T).

A safer and more convenient way to do this is to use Google Play calibration apps like Color Calibration or Screen Balance, which create a translucent color-correcting filter over the image, and while that doesn't change the native matrix settings, the visual effect can be very close to perfect.

When using ADB, Root rights are often required to save settings, the receipt of which deprives of warranties.

💡

Before use ADB-commands must make a backup of important data. An error command can lead to a software interface failure, which will have to be corrected by a complete reset of settings.

Elimination of yellowness and blue gamma

One of the most common problems of Xiaomi Mi owners 9T It's called the yellowness of the bottom of the screen. It's a design feature of many people. AMOLED-So it's hard to software out the whole effect, but you can minimize the contrast between the top and the bottom.

To combat yellowness, try shifting the overall color balance toward colder shades (blue) that make the top of the screen more "sterile," but visually level the color reproduction across the area. Don't be afraid to experiment with the temperature slider in the Colors and saturation section.

If the screen is too blue ("ice"), which is often found in Vivid mode, shifting the slider to the warm side will restore the naturalness of the skin in photos and the texture of the paper in the readers. The human eye tires more quickly from the excess of the blue spectrum, so warm calibration is preferable for long reading.

⚠️ Warning: Avoid setting temperature extremes. A screen that is too warm will make an image look dirty, and a screen that is too cold will make it look unnaturally pale. Look for a balance where a white sheet of paper looks white instead of cream or blue.

It’s also worth checking out the Safety app –> Eye Protection, which sometimes makes users forget that they’ve turned on automatic adjustment that dynamically changes colors depending on the time of day, creating the illusion of poor calibration.

The Impact of Reading Mode and Dark Mode on Colors

Reading Mode in MIUI works as a powerful filter that desaturates colors and adds a warm hue to simulate electronic paper, and if you want to calibrate to view photos or videos, you have to turn it off completely, and it override all system color settings.

Dark Mode also influences the perception of calibration. AMOLED-However, the interface in a dark theme often uses dark gray shades (#121212), which can be illuminated unevenly. When calibrating, always switch to a light theme to see the real picture.

There is an advanced read mode with a Color or Monochrome setting, which keeps the color saturation, but the temperature stays warm, a compromise for those who want to protect their eyes but are not willing to sacrifice the colorfulness of the interface.

💡

For professional color work, always use a standard profile, turn off all eye protection filters, and adjust at 70-80% brightness.

Frequently Asked Questions (FAQ)