Local contrast in Xiaomi TV: A complete guide to customization and optimization

If you've ever looked at the settings of your Xiaomi TV, you've probably come across a mysterious parameter, local contrast, which often raises questions: what does it mean, how does it affect picture quality and should it be turned on? Unlike global contrast, which changes the ratio of light to shadow uniformly throughout the screen, local contrast works point-by-point, analyzing individual areas of the image.

In this article, we will understand how local contrast works in Xiaomi Mi TVs. TV, Redmi Smart TV And other models of the brand, what technologies are behind it (including Local Dimming and image processing algorithms), and how to properly configure it for different scenarios – from watching movies to playing games. You will also learn why it is sometimes better to disable this feature, and how it relates to parameters such as brightness, gamma and gamma. HDR.

Spoiler: Local contrast can greatly improve the detail of dark scenes, and can also spoil the picture with artifacts if used illiterately. Next, a detailed analysis of examples, tables and instructions.

What is local contrast and how does it work in Xiaomi TVs

Local Contrast or Local Dimming is a technology that dynamically adjusts the brightness of individual sections of a screen. Unlike global contrast, which changes the parameters for the entire image, local contrast analyzes the picture by zone (sometimes by pixel) and adjusts the backlight or signal processing in real time.

In Xiaomi TVs, this feature is implemented in two ways:

• 🔦 Local Dimming – used in models with LED-lighting (e.g. Mi) TV Q2 75" or Redmi" MAX 98), where LEDs are divided into zones (8 to 128 in the premium segment).The system dims or amplifies the backlight depending on the content of the scene.
• 🖥️ Software processing – algorithms artificially enhance contrast in dark and light areas through a chipset (used in low-end models without zone lighting, for example, Redmi Smart). TV A Series).

The main goal of the technology is to improve detail in the shadows (so that dark scenes do not lose objects) and prevent illumination (when bright areas blur neighboring dark areas). For example, in a film with night shooting, local contrast will help to see the faces of actors against the background of the sky, without turning them into silhouettes.

Differences between local contrast and global HDR

Users often confuse local contrast with other image parameters, and let's look at the key differences:

Important: Xiaomi TVs have local contrast and HDR They can work together, but they don't replace each other. HDR-Local contrast will help you better capture details in very dark or very light scenes that will otherwise merge due to screen limitations.

HDR defines the format of the content (how the video is recorded) and local contrast determines how the TV displays the content, for example, a movie in Dolby Vision will look better on a Mi TV Q2 with Local Dimming enabled than on a budget model without this feature.

How to enable and configure local contrast on Xiaomi TV

The menu interface on Xiaomi TVs may vary depending on the PatchWall model and version, but the general algorithm for setting up local contrast looks like this:

1. Open Settings (cog in the upper right corner of the main screen).
2. Go to the Display and Sound section → Image.
3. Select an image profile (usually Standard, Movie or Game).
4. Find the Local Dimming (or Local Dimming) option in English-language firmware.
5. Activate the function and adjust the intensity (if available).

In some models (e.g. Mi TV P1), local contrast is hidden in additional settings:

Settings → Display and sound → Image → Additional → Local contrast

Set a profile for "Cinema"

Include local contrast (50-70% level)

Turn off "Dynamic Contrast"

Activate HDR (if the content supports)

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Tip: If your model doesn't have a clear Local Contrast item, but you have Dynamic Backlight or Adaptive Brightness, it's probably its equivalent. On budget TVs (like Redmi Smart TV A Series), the feature may be called Contrast Optimization.

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To test local contrast, turn on a test video with alternate dark and light bars (for example, on YouTube for "local dimming test"). The screen should clearly see the boundaries without lighting.

When local contrast is useful and when it is best to turn it off

Despite the obvious advantages, local contrast is not suitable for all scenarios, here is when to use it and when not:

• 🎬 Useful to include:
• 🌃 For watching movies with dark scenes (thrillers, fiction, noir).
• 🎮 High dynamic range games (such as Cyberpunk 2077 or The Last of Us).
• 📺 When you watch it. HDR-content (Netflix, Disney)+, 4K Blu-ray).
• ❌ Better turn it off:
• 📊 To work with graphics, texts or interfaces (can distort colors).
• 🎞️ When watching old low-resolution movies (will enhance compression artifacts).
• 🔄 If you notice the "shimmering" of the backlights in dynamic scenes (typical for budget models).

Be especially careful about setting local contrast in game mode. Many Xiaomi TVs automatically turn off image processing to reduce input lag, but if the feature remains active, it can add lags. Check this in the Settings menu → Display and sound → Game mode.

⚠️ Attention: In models with OLED-screens (e.g., Mi) TV Master OLED) Local contrast works differently, where every pixel is illuminated, so there is no problem with halos. However, prolonged display of static elements (channel logos, interface) can lead to pixel burnout.

Comparison of local contrast in different Xiaomi models

Not all Xiaomi TVs are equally good at local contrast, depending on the type of backlight, number of zones and processor power, and the comparison of key models is as follows:

The table shows that real Local Dimming with more zones is only available in top models (Q and Master series); on budget TVs (Redmi or A series), the feature is software-based and often does more harm than good. If your model is in the latter, try to include local contrast at a minimum level (20-30%) and evaluate the result.

For Mi TV Q2 or Mi TV Master owners, we recommend experimenting with settings in the 50-80% range, these TVs have enough backlight zones to avoid artifacts, and a powerful processor for image processing.

Frequent Local Contrast Problems and How to Fix Them

Even in advanced Xiaomi models, local contrast may not work properly. Consider typical problems and ways to solve them:

• 🌑 "Black becomes grey": If dark scenes appear faded, check the setting "Black level" in the image menu. Set the value "Low" (for the image). HDMI) High (for embedded applications).
• 🔆 Halos around bright objects: Reduce the intensity of local contrast to 30-40% Or turn it off altogether. LED This effect is inevitable.
• 🎛️ Screen flicker: Update the TV firmware (path: Settings) → On TV. → System updates. Older versions of software had dynamic lighting bugs.
• 🖼️ Color distortion: Reset the image settings to factory (Settings) → Display and sound → Reset your image settings and reset local contrast.

⚠️ Attention: If after turning on local contrast, the TV spontaneously changes brightness (for example, in the menu or when watching normal transmissions), this is a sign of a malfunction of the light sensor.

You can use YouTube test videos to diagnose problems:

• For black level check: search for "black level test pattern".
• The first is the local dimming bloom test.
• The dynamic scene test is called the 4K Motion Contrast Test.

If the artifacts are saved even after setting up, there may be a hardware problem (e.g., faulty LEDs backlighting), in which case, contact Xiaomi's service center.

FAQ: Answers to Frequent Questions About Local Contrast