Modern Xiaomi and Redmi smartphones have powerful processors and bright AMOLED or IPS displays that consume significant amounts of power. By default, the system is set to aggressively save charge, automatically locking the device after a short downtime. However, in some scenarios, the user requires the display to remain active for a long period without human intervention.
The need to leave the screen on may arise when reading long texts, viewing navigation charts while moving, or using a smartphone as a desktop clock. This is also true for those who use the phone as a display or monitor to monitor cameras. Standard MIUI settings often do not allow flexible control of the sleep timer in such specific cases.
In this article, we will discuss all available methods, from basic system settings to the use of specialized utilities and engineering menus, you will learn how to prevent accidental locking and customize the device to your individual needs without sacrificing the durability of the matrix.
Standard settings of the sleep timer in MIUI
The first step is always to check the basic parameters of the operating system. In the MIUI shell or the new HyperOS, the time management before locking is in the display settings section, where the user can choose the time after which the backlight goes out. Usually the range varies from 15 seconds to 10 minutes.
To change the setting, go to Settings → Screen and Brightness → Sleep mode. If you choose the maximum value of 10 minutes, the phone will remain active for quite a long time. However, it is worth considering that this is not a complete solution to the problem, since the timer will still work.
Some Xiaomi smartphones have a hidden option “No limit” or “No turn off”, but it is often not available in the standard menu for ordinary users.
It's important to understand the difference between turning off the backlight and locking the device completely. The timing affects the backlight, then the lock screen is triggered. For some tasks, such as showing a presentation, this may not be enough and you will need to turn off the lock itself.
⚠️ Attention: Constant operation of the display at maximum brightness leads to uneven wear of the pixels. AMOLED-In matrices, this can cause a burn-in effect, when static interface elements remain permanently visible even on the screen turned off.
Use the Keep Screen On app for Xiaomi
If standard tools are not enough, the best solution is to install specialized software, one of the easiest and most effective tools is the Keep Screen On application. It does not require root rights and works over the system constraints, keeping the backlight active.
Once installed, the utility adds a handy switch to the notification curtain, so you can activate the "Always On" mode at any time. The app is smart: it can ignore video players or navigators, but turn off the screen when reading books if you don't need to.
- 📱 Flexible rules: the ability to create profiles for different applications so that the screen goes out only in unnecessary cases.
- 🔋 Energy savings: a smart algorithm reduces brightness to a minimum if the user does not touch the screen for a long time, but does not allow it to go out completely.
- 🚫 No Advertising: Unlike many analogues, this solution works in the background and does not require permanent permissions.
To work properly, the system needs to be given permissions, and when it first starts, Keep Screen On will request access to surfaces on top of other windows, and without that permission, the app will not be able to intercept the system shutdown timer.
Developer Mode: Debugging by USB
Deep in the Android system settings, there's a developer menu that contains a feature that's perfect for our task: the "Do not turn off screen" option when charging, a native OS feature that doesn't require third-party software installation.
To activate this menu, go to Settings → About Phone and quickly click 7 times on the “MIUI Version” option. After the “You have become a developer” notification appears, a new “Additional” or “Extended Settings” section will appear in the settings menu.
Inside the Developer section, you need to find the "Stay awake" item and activate it. Now, as long as the phone is connected to the charger, the display will burn forever, ideal for using a smartphone as a stationary information board or a smartwatch at a docking station.
☑️ Setting up the developer mode
It's worth noting that this function only works when you have an active connection to the power source, and once you turn off the cable, the standard sleep timer goes back into effect, and it's a protective mechanism that prevents the battery from running out of your pocket.
Using Developer Mode is the most stable method, as it is integrated into the core of the system, but be sure to turn this option off if you plan to use the phone in normal mode to avoid accidental discharge if the charger moves away from contact.
Comparison of methods of preserving the activity of the screen
So the way you choose to do it depends on your specific goals, and somebody wants to look at recipes in the kitchen, somebody wants to keep the navigator on the road, and let's compare the basic approaches so you can choose the best one.
| Method | Requires installation | It works without charging. | Impact on the battery |
|---|---|---|---|
| Timer settings | No. | Yes (up to 10 minutes) | Average. |
| Keep Screen On appendix | Yes. | Yes. | High. |
| Developer mode | No. | No (only charging) | Critical (constant current) |
| Video content | No. | Yes. | Low (systemic ban) |
As you can see from the table, native settings are time-limited, and developer mode is socket-bound, and third-party applications offer the most freedom, but require additional software to be installed, and you have to choose from the use case.
If you just want to watch a long video, most players (YouTube, VLC, MX Player) automatically block the sleep timer, in which case no additional action is necessary, the system will understand that the media content is playing.
Why does the screen go out while reading in the browser?
The problem of burnout and overheating of the device
Long-term display performance at high brightness is stressful for the hardware of Xiaomi smartphone. Modern matrices, especially organic ones (OLED, AMOLED), are prone to degradation of organic compounds. A static picture hanging for hours can leave a “ghost” trail.
Also, the processor and video chip are constantly working to render the image, and in the summer heat or when using a case with poor heat transfer, this can cause trottling (decreased performance) or even emergency shutdown of the device.
- 🔥 Heat threshold: When the critical temperature is reached, the system will force the brightness to decrease or turn off the screen, ignoring your settings.
- 🎨 Color shift: Some blue subpixels may deplete their resource more quickly, causing a change in white balance.
- 🔋 Battery degradation: Constant charge-discharge cycles when the screen is on (cycling) harm battery chemistry.
To minimize the risks, it is recommended to reduce the brightness to a comfortable minimum if you leave the phone on for a long time, it is also useful to periodically change a static image or turn on a screensaver with moving elements.
⚠️ Warning: Never leave your smartphone with the screen on in direct sunlight or charging in a hot room.This can cause battery bloating and permanent damage to the display.
Automation through scripts and macros
For advanced users, Xiaomi offers powerful automation tools. In the Security app or through Google Assistant, you can customize scripts that will change the screen settings depending on the context.
For example, you can create a rule: “If you run the Google Maps app and your phone is connected to the Bluetooth of the car, you can set a screen timeout for 30 minutes,” which eliminates the need to change the settings every time you get into the car.
Another option is to use macros over time, and if you know you're reading the news from 20:00 to 21:00, the automation itself will turn on the "don't turn off" mode at that time, which requires a deeper setup, but it greatly improves the comfort of use.
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Use the one-handed control function or gestures to quickly reset the activity timer. Light tapping on the screen or double tapping (if supported) can extend the backlight time without changing the system settings.
Automation allows you to combine convenience and energy efficiency, so you don't have to remember to put your settings back when you don't need a permanent screen, but the system will do it for you.
Remember that some scenarios may conflict with MIUI energy saving. If automation doesn't work, add the automating app to the battery exception list and allow auto-start.
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The optimal strategy is to combine methods: use a native timer for tasks, a developer mode for stationary use, and helper applications for specific scenarios.