How to find out the screen manufacturer Xiaomi Redmi Note 9 Pro

Buying a new smartphone or replacing broken glass always comes with the risk of getting a display from a lesser-quality supplier. Owners of the popular Redmi Note 9 Pro often face a lottery, as Xiaomi uses components from different vendors for the same device model. This is standard practice for optimizing supply chains, but for the end user, the difference in color reproduction and power consumption can be significant.

In this article, we will explore proven methods for identifying a display provider without having to disassemble a gadget or have special programming skills. You will learn how to use hidden codes, software utilities, and even macro photography to get accurate information about who exactly made your matrix.

Understanding which component supplier was used in your instance will help you better adjust the brightness or reasonably require a replacement device in the event of a defect.

Why Xiaomi is changing screen providers

Large electronics manufacturers like Xiaomi never rely on a single supplier of critical components. It's a security strategy: if one factory stops, production won't stop. For the Redmi Note 9 Pro, the main suppliers are Tianma, Huaxing and, in some rare cases, Samsung, the difference between them is production technology, viewing angles and energy efficiency.

Most often users argue about the benefits IPS-Some argue that Tianma screens have a warmer shade, while Huaxing can go into the cold spectrum. Color calibration in the factory is also different, which affects the final perception of the picture without third-party settings.

⚠️ Note: Having a specific logo or code on a plume does not always guarantee 100% identity of the characteristics of the entire batch.

The differences may also be in the backlighting technology: more expensive arrays often have better uniformity of glow throughout the area, which is especially noticeable on a white background at low brightness, which is why knowing the manufacturer helps to understand whether the "light" in the corner is a defect or a feature of a particular screen model.

Owners often wonder if the manufacturer is affecting autonomy. Yes, different arrays consume different amounts of energy at the same brightness. If you're critical to operating time, then vendor identification can be the first step to optimizing.

Using the CIT Engineering Menu to Check

The easiest and safest way to get information about your smartphone hardware is to use a built-in engineering menu, called the CIT (Customer Integration Test) in the MIUI shell, which is designed to test all the phone modules in the factory and contains detailed technical information.

To get into the menu, open the standard Phone app and type the combination ##6484##. If the code is entered correctly, the test list will open. We're interested in the item associated with the display, which can be called Version Information, Hardware Info or simply Display.

In the window that opens, look for a line that contains the acronym LCM (Liquid Crystal Module) or Panel. This is often where the manufacturer's code is written. However, the interface may differ depending on the version of MIUI installed on your Redmi Note 9 Pro.

Sometimes the information is hidden in a general system report. Go to Version Information and look carefully at the list. You need to find a line that mentions a display model. Often there are codes like NT36523 or ILI9881 that point to the controller, but indirectly can hint at the matrix manufacturer.

⚠️ Note: Do not press the "Fail" or "Pass" button in the tests CIT It's not necessary, if you're just checking the data, it can affect the factory test statistics in the device logs.

If the CIT menu doesn't explicitly indicate a brand (e.g., it says simply "LCD"), try going to a color test. Click on the Color test and look closely at the bottom of the screen or corners. Some firmware versions display technical information in fine print directly over the test image.

Analysis through ADB and Command Prompt

For a deeper immersion in the system, you can use the Android debugging bridge (ADB). This method requires connecting the smartphone to the computer through USB-It allows you to count system logs that are not displayed in the normal interface.

First, activate Developer Mode. Go to Settings → About Phone and quickly press 7 times on MIUI Version. Then, in advanced settings, enable USB Debugging. Connect your phone to your PC and start the terminal or command line.

adb shell dumpsys display | grep -i"panel\|lcd\|vendor"

This command will display the current state of the display. See (output) for lines that contain company names.=tianma panel_supplier=huaxing will give you an accurate answer. If the standard dumpsys doesn't work, you can try to count the properties of the system.

An alternative way to use ADB is to use the getprop command. Enter in the terminal:

adb shell getprop | grep -i lcd

It will return a list of display properties. Look for values that contain the names of known panel manufacturers. This method is more reliable because it reads data directly from the Android system properties that are generated when drivers are loaded.

Definition by codes in logs and system properties

If you don't want to connect the cable, you can use applications to view system information, such as Device Info HW or AIDA64. However, they often only show the resolution and density of the pixels.

In the Android file system, the /sys/class/ section often stores files with information about the connected hardware. Using a root-rights file manager (or through the terminal on the device itself), you can go on the /sys/class/drm/ or similar path and find text files describing the panel.

Note the following keywords in file titles or their content:

• 📱 Tianma – often marked with codes TM or NT.
• 📱 Huaxing – can be referred to as HX or CSOT.
• 📱 Samsung – usually has a labeling AMS or SDC.
• 📱 BOE — It is less common, the codes begin in B.

It's important to understand that the display driver may be called something different than the matrix manufacturer itself. For example, the controller may be from Ilitek, but the matrix itself is from Tianma. So look for the brand name in the hardware ID description.

Visual analysis and macrography of the plume

The most reliable, but also the most risky method is a physical examination of the display plume. This requires partially or completely disassembling the Redmi Note 9 Pro smartphone. If you are not confident in your abilities, it is better to resort to the software methods described above.

When you open the door carefully (after heating the edges of the case and removing the back cover), you need to disconnect the display plume. On a flexible cable, next to the contact group, often the logo or the manufacturer's code is printed. Tianma can have the "T" logo, Huaxing has a specific font.

If you don't have a logo, you can take a macro snapshot of a pixel grid with a white background on, and different manufacturers use different subpixel structures (PenTile, RGB stripe), but it's very difficult for the average user to distinguish them in a photo without reference patterns.

⚠️ Warning: Disassembling your smartphone automatically voids your warranty. Be extremely careful with the battery - damage to it can lead to fire!

The sleeve can also be applied QR-Scanning these codes sometimes gives information about the batch and the manufacturer, but most often it is the internal codes of the assembly plant Xiaomi, not the manufacturer of the matrix.

Comparative matrix characteristics table

To make it easier for you to navigate the technical differences, we have prepared a summary table of the main parameters that can be found in the Redmi Note 9 Pro. Remember that the real figures can vary from instance to instance.

As you can see from the table, the differences in basic characteristics (type of matrix, frequency) are minimal, since Xiaomi sets strict technical requirements.

Users often note that Huaxing’s screens have slightly higher maximum brightness, which is noticeable when used in the sun. At the same time, Tianma matrices can perform better at producing natural colors without saturation.

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The difference between different manufacturers’ matrices in a single smartphone is often subtle in everyday use, but can be critical for professional color work.

Manufacturer's influence on calibration and adjustment

Knowing the manufacturer of your screen, you can customize the device to your preferences. MIUI has hidden calibration options available through an engineering menu or special applications. If you know you have Tianma, you can add more warm tones to compensate for the cold hue.

To access the advanced color settings, go to Settings → Screen → Color Scheme. You can select Standard, Saturated or Classic modes. For each type of matrix, one of these modes will be closest to the reference sRGB.

Also worth mentioning is the DC Dimming feature, which works differently on different matrices, and on some screens, enabling it can cause "noise" or black irregularities, and if you notice such artifacts, try turning it off in the engineering menu or through the app.

Remember that over time, display performance can degrade. OLED screens burn out, but the Redmi Note 9 Pro uses IPS, which is more stable, but can turn yellow around the edges.

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To save the life of any manufacturer's matrix, use a dark interface theme and automatic brightness adjustment, which will reduce heating and backlight load.

Frequently Asked Questions (FAQ)