The screen brightness automatically changes on my HUAWEI phone/tablet

If the screen brightness automatically changes, it may be because you have enabled Automatic for brightness adjustment. Once enabled, the screen brightness will automatically change to a suitable level based on the environmental lighting conditions detected by the ambient light sensor on the top of the phone. (The screen brightness will decrease if the ambient light sensor is covered.) Perform the following operations to troubleshoot:

1. Check whether the ambient light sensor on the phone/tablet is covered by a protective film or any foreign objects.
2. In a dim environment or an environment with a single light source, the detected ambient brightness is low. Therefore, the system brightness is low. It is recommended that you manually adjust the brightness to a proper value.
3. If you wish the screen brightness to remain unchanged, go to Settings > Display & brightness/Brightness, disable Automatic, and adjust the screen brightness to your desired level. If you cannot find this switch, please refer to this link.

If the issue persists after the automatic adjustment feature is disabled, perform the following operations based on the scenario:

1. If the screen brightness automatically increases or decreases when you open or exit an app, the possible causes are as follows:

a. The app has adjusted the screen brightness itself. This is because the system brightness adjustment permission is open to third-party apps such as video, reader, and payment apps. For example, when scanning a QR code in Alipay, the screen brightness increases instantly. This is a normal phenomenon.

b. To save power and for an optimal user experience, the system automatically changes the screen brightness in some scenarios. For example, the screen brightness automatically changes when using apps such as WeChat, Browser, Contacts, and Messaging, even if automatic brightness adjustment is disabled. This is a designed feature of your device.

2. If your device heats up and the screen brightness automatically dims when you use an app (for example, a game app), the brightness is reduced to prevent overheating. The screen brightness will return to normal after the temperature drops. This is a designed feature of your device.

· When the sensor detects that the ambient light reaches a certain level, your device will automatically increase its screen brightness to improve your viewing experience. This is normal and please do not be concerned.

· To protect your eyesight, avoid staring at your device when the ambient light is strong (such as in direct sunlight) for long periods of time.

To prevent the screen from being turned on during a call when the proximity sensor incorrectly detects that the device is far away from your ear, a mechanism has been added so that it will take a short while for your device screen to wake up in the preceding case.

When Eye Comfort is enabled, the screen will switch between white and yellow background colors, which resembles a change of screen brightness.