When adaptive brightness is turned on, your iPhone can judge the intensity of the surrounding light using its ambient light sensors and change the display brightness accordingly. When you’re outside, surrounded by bright daylight, the display’s brightness goes up automatically. Conversely, when you’re scrolling on your iPhone in your bed at night, the brightness goes down to reduce the strain on your eyes. If your iPhone keeps dimming automatically for no reason, try these 6 fixes.
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In This Article
What’s causing your iPhone display to dim?
The cause of this issue may not become apparent instantly, but here are some of the reasons why your iPhone may be acting this way.
- Immediate movement from bright to shady areas can cause the brightness to go down abruptly.
- Your iPhone automatically dims the display when it has been operating in maximum brightness all day. This is done to prevent screen burn-in.
- Your iPhone is overheating.
- The automatic brightness function is malfunctioning.
- Attention Aware is enabled.
- True Tone and Night Shift are messing with the display’s colour temperature and brightness.
- Your iPhone’s ambient light sensor is broken.
Turn off auto-brightness
Step 1: Go to Settings and select Accessibility.
Step 2: Tap on Display & Text Size.
Step 3: Scroll down and turn off the toggle switch next to Auto-Brightness.
Turn off Attention Aware features
Step 1: Go to Settings and select Accessibility.
Step 2: Tap on Face ID and Attention.
Step 3: Turn off the toggle switch next to Attention Aware Features.
Step 4: Enter your passcode to execute the change.
Turn off True Tone and Night Shift
Step 1: Go to Settings and select Display & Brightness.
Step 2: Turn off the toggle switch next to True Tone.
Step 3: Go to Night Shift and turn off its toggle switch.
Let your iPhone cool down in case it overheats
It is not unusual for your iPhone to warm up when you’re using it in bright outdoor conditions. On hot, sunny days, your iPhone might overheat. In this situation, an overheating warning is displayed on the device. You won’t be able to use the camera or carry out other power-intensive tasks until the device cools down. To cut down on power consumption and reduce the strain on the battery, your iPhone automatically dims the display. Cool down your device to restore the brightness level.
Disable Adaptive Power Mode
Adaptive Power Mode is a new feature on iOS 26. It dims the display and takes longer to complete certain background tasks when your iPhone is using the battery at a higher rate than usual. Here’s how you can disable it.
Step 1: Go to Settings.
Step 2: Select Battery.
Step 3: Tap on Power Mode.
Step 4: Turn on the toggle switch next to Adaptive Power.
Update your iPhone
Step 1: Go to Settings.
Step 2: Tap on General.
Step 3: Tap on Software Update.
Step 4: Your iPhone will update automatically. Hit Update Now.
Frequently Asked Questions (FAQs)
Why does my iPhone keep dimming automatically?
Your iPhone dims its display automatically if it is not surrounded by intense lighting. The ‘Attention Aware’ feature also automatically dims the display when you’re not looking at the device. Features like True Tone and Night Shift can change the colour temperature of the display based on the surrounding conditions.
How do I stop my iPhone from dimming automatically?
Go to Settings>Accessibility>Display & Text Size and turn off the toggle switch next to Auto-Brightness. Turn off ‘Attention Aware in Face ID’ and Attention settings on the Accessibility page. Finally, turn off True Tone and Night Sight from the display settings.
Why is my iPhone screen dark even on full brightness?
When your iPhone’s internal temperature crosses a certain limit, it automatically dims the display to reduce the strain on the battery.
Why does my iPhone screen go dark in bright sunlight?
If you’ve been using your iPhone in maximum brightness all day in bright sunlight, it will automatically lower the brightness to prevent burn-in.
Is auto-brightness good for the iPhone?
Yes, enabling auto-brightness on your iPhone is good for its battery life since the display only uses more power when it needs it.
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Final Thoughts
This is how you can fix the ‘iPhone keeps dimming automatically’ issue. While you’re here, check out how you can make WhatsApp the default messaging and calling app on your iPhone. If you have any questions, let us know in the comments!
