One possible reason why your iPhone goes dark even when the brightness is up is due to a feature called auto-lock. Auto-lock is designed to conserve battery life by automatically turning off the screen after a certain period of inactivity. This can be set in the iPhone’s settings, with options ranging from 30 seconds to never.
If your auto-lock setting is set to a short duration, such as 30 seconds or 1 minute, the screen will go dark quickly if you’re not actively using your iPhone. This can give the impression that the brightness is up, but the screen is still dimming.
To check and adjust your auto-lock settings, follow these steps:
1. Open the Settings app on your iPhone.
2. Scroll down and tap on “Display & Brightness.”
3. Tap on “Auto-Lock.”
4. You will see a list of time intervals ranging from 30 seconds to “Never.” Choose the desired duration or select “Never” if you prefer the screen to never turn off automatically.
Another possible reason for your iPhone’s screen dimming even when the brightness is up is the auto-brightness feature. As mentioned earlier, this feature adjusts the screen brightness based on the ambient light conditions. The iPhone uses an ambient light sensor located near the front-facing camera to measure the surrounding light level. If the sensor detects low light, it will automatically reduce the screen brightness to make it easier on the eyes and conserve battery life.
To check and adjust your auto-brightness settings, follow these steps:
1. Open the Settings app on your iPhone.
2. Scroll down and tap on “Display & Brightness.”
3. Disable the “Auto-Brightness” toggle switch if it is enabled. This will prevent the iPhone from automatically adjusting the screen brightness based on ambient light conditions.
By disabling auto-brightness, you will have full control over the screen brightness and it will no longer dim automatically. However, keep in mind that manually setting the brightness to a high level can consume more battery power.
If the issue persists even after adjusting the auto-lock and auto-brightness settings, there may be a hardware issue with the ambient light sensor on your iPhone. In such cases, it is recommended to contact Apple Support or visit an authorized service center for further assistance.
The iPhone may go dark even when the brightness is up due to the auto-lock feature, which automatically turns off the screen after a certain period of inactivity. Additionally, the auto-brightness feature adjusts the screen brightness based on ambient light conditions. By adjusting the auto-lock and auto-brightness settings, you can control the screen behavior and prevent automatic dimming.