How to Fix Brightness Keeps Going Down on iPhone Screen

iphone automatically adjust brightness

Are you experiencing the brightness keeps going down on iPhone screen issue? There are several factors that can cause this problem such as a setting issue, low battery life, or even the device overheating. To fix this you will need to perform several troubleshooting steps.

The iPhone is a line of smartphones designed and marketed by Apple since 2007. It runs on Apple’s iOS operating system and has become one of the most popular and iconic smartphones in the world. Each new release of the iPhone brings new features and improvements, with the latest model being the iPhone 14. From its sleek design to its advanced camera technology and powerful processing capabilities, the iPhone continues to push the boundaries of mobile technology.

Why does my iPhone keep going back to low screen brightness?

One of the issues that you might experience with your iPhone is when the iPhone screen dims on its own.

Here are some possible reasons why an iPhone screen brightness may dim on its own:

  • Auto-Brightness: iPhones have a feature called “Auto-Brightness,” which adjusts the screen’s brightness based on the lighting conditions in the environment. If the lighting changes, the screen brightness may adjust accordingly.
  • Low Power Mode: When an iPhone enters Low Power Mode, the screen brightness is automatically dimmed to help conserve battery life.
  • Battery Health: If an iPhone’s battery health is poor, it may not be able to sustain the same level of screen brightness for as long as it used to. In this case, the screen may dim to help conserve battery life.
  • Device overheating: In order to protect your iPhone from physical damage due to overheating, its screen will automatically dim once the device temperature exceeds 40°C, even if you have disabled the auto-brightness feature.
  • True Tone: If your iPhone’s True Tone feature is enabled, it can adjust the screen brightness based on the surrounding environment, similar to the auto-brightness feature, even if you have manually disabled the latter.
  • Night Shift: If your iPhone’s Night Shift feature is activated, it could be another reason why your screen keeps dimming. This feature adjusts the display’s color temperature to reduce blue light emissions according to your schedule, as well as shift the screen brightness to a more comfortable level for nighttime use.

Here’s what you can do to fix the iPhone screen dimming issue.

Solution 1: Turn off auto brightness feature

The auto-brightness feature on an iPhone adjusts the display brightness according to the lighting conditions in the surrounding environment.

The iPhone uses its light sensors to detect changes in ambient light and automatically adjusts the display brightness to compensate. For example, in a bright environment, the screen will increase its brightness to make it easier to read, and in a dim environment, the screen will lower its brightness to avoid eye strain and conserve battery life.

If you’re experiencing unwanted dimming on your iPhone, turning off the Auto-Brightness feature may be necessary to resolve the issue.

Disabling auto brightness

  • Open the Settings app.
  • Tap Display & Text Size.
  • Scroll to Auto-Brightness and tap to turn the feature off.

After you disable auto brightness try checking if this fix iPhone screen auto brightness issue.

Solution 2: Disable True Tone feature

True Tone is a display feature on Apple devices that adjusts the color temperature of the screen based on the ambient lighting conditions.

The technology uses advanced sensors to measure the ambient light temperature and color, and then adjusts the display’s color temperature to match the surrounding environment. This results in a more natural and comfortable viewing experience for users, with colors that appear more accurate and vibrant.

If your iPhone screen is still dimming with auto brightness turned off then try turning off True Tone.

Turn off True Tone

  • Open the Settings app.
  • Go to Display & Brightness.
  • Turn True Tone off.

You can also turn off True Tone from the control center. Open the control center then touch and gold the brightness slider. Turn off the True Tone switch.

Solution 3: Disable Night Shift feature

Night Shift is an iPhone feature that adjusts the color temperature of the display to reduce blue light emissions, which can disrupt sleep patterns. The feature works by shifting the color spectrum of the display to the warmer end of the spectrum, which can make the screen appear more orange or yellow.

If your iPhone is still dimming with auto brightness off then try turning off Night Shift as well.

Turn off Night Shift

  • Open the Settings app.
  • Go to Display & Brightness.
  • Tap Night Shift.
  • Turn off any schedule for Night Shift.

Solution 4: Disable low power mode

Low Power Mode is a feature available on iPhones that helps to conserve battery life by reducing power consumption.

When this mode is enabled, the iPhone will automatically reduce or turn off some features that consume a lot of energy, such as automatic downloads, background app refresh, and some visual effects. Additionally, the screen brightness is also reduced, and the device may enter into sleep mode more quickly.

If your iPhone’s brightness is auto dimming then try turning off low power mode.

Turn off low power mode

  • Open the Settings app.
  • Go to Battery.
  • Turn off low power mode.

Solution 5: Disable Zoom Filter

The iPhone Zoom filter is a feature is designed to help individuals who have difficulty seeing the screen content or reading text by magnifying the display.

With this feature, users can pinch or double-tap the screen to zoom in or out, and even customize the zoom level to their specific needs. This feature is particularly useful for people with visual impairments, as it can help make the screen more visible and easier to interact with.

If your iPhone screen is still dimming with auto brightness off then try turning off this feature.

Turn off Zoom Filter

  • Open the Settings app.
  • Go to Accessibility.
  • Go to Zoom.
  • Turn off the Zoom switch.

Try checking if this fix iPhone screen dimming issue.

Solution 5: Disable auto lock feature

The iPhone Auto Lock feature is a setting that automatically locks the screen after a set period of inactivity.

Auto lock helps to secure the device and prevent unauthorized access, as the user must enter their passcode or use biometric authentication to unlock the screen. Additionally, the auto lock feature also helps to conserve battery life by turning off the screen when not in use, thus reducing power consumption.

To prevent your iPhone from dimming before the screen locks, simply disable the Auto-Lock feature.

Turn off auto lock

  • Open Settings.
  • Go to Display & Brightness.
  • Click on Auto-Lock.
  • Set it to Never.

Solution 6: Check if your iPhone is overheating

If you are experiencing iPhone display dimming issues then one possible cause could be overheating. iPhones can overheat due to various reasons such as being exposed to direct sunlight, running too many apps, or having a malfunctioning battery.

If your iPhone is overheating, then try moving it to a cooler location or closing down some apps to reduce its workload. Additionally, you may want to consider replacing your iPhone battery if it is not functioning correctly.

Other troubleshooting steps to consider to fix iPhone dimming problem

In rare cases, your iPhone’s screen may continue to dim even after disabling Auto-Brightness, Night Shift, and Low Power Mode. This issue may be caused by a software glitch or hardware malfunction. To troubleshoot the problem, try some basic software troubleshooting steps.

Restart your iPhone

If you are experiencing screen dimming issues on your iPhone, one simple solution is to restart your device. This can help to clear out any software glitches or bugs that may be causing the dimming issue.

  • Press and hold either volume button and the side button until the power-off slider appears.
  • Drag the slider, then wait 30 seconds for your device to turn off.
  • To turn your device back on, press and hold the side button (on the right side of your iPhone) until you see the Apple logo.

Perform a software update

If you are experiencing issues with the iPhone’s display then one possible solution is to perform a software update. Software updates can help to fix bugs and glitches that may be causing the dimming issue, as well as improve your device’s overall performance and security.

Go to Settings > General > Software Update.

Perform a factory reset

If you are experiencing iPhone brightness issues and the basic troubleshooting steps, such as restarting or updating the software, have not resolved the issue, you may need to perform a factory reset.

A factory reset will erase all data and settings from your device and restore it to its original state, which can help to fix any software-related issues that may be causing the brightness problem.

To reset iPhone, navigate to the Settings app and select “General,” then “Reset.” From there, select “Erase All Content and Settings” and follow the prompts to confirm the reset.

After the reset try checking if the auto dim issue still occurs.

Frequently Asked Questions

  1. Why does my iPhone keep dimming on its own?

    This is a known issue that can occur due to the phone's automatic brightness feature, which automatically adjusts the screen brightness depending on the light conditions. It can also happen when the phone's screen gets overheated, or if there are hardware issues.

  2. Why does my iPhone dim on a sunny day?

    On sunny days, the phone's automatic brightness feature may lower the screen brightness to adjust to the high levels of ambient light. To avoid this, you can turn off the auto-brightness feature in the phone's settings.

  3. Why does my iPhone have the same issues with the automatic brightness feature?

    Some users have reported experiencing the same issues with the phone's automatic brightness feature, such as the screen dimming automatically. This may be due to a software issue, and performing a software update or a factory reset may help to resolve the problem.

  4. What is white point on iPhone, and how does it affect screen brightness?

    White point is a setting on the iPhone that adjusts the color temperature of the phone's screen. Changing the white point can affect the perceived brightness of the screen, so adjusting it may help to resolve any issues with dimming.

  5. How can I fix the iPhone screen dimming issue?

    If you're experiencing issues with your iPhone screen dimming, you can try turning off the auto-brightness feature, adjusting the brightness levels manually, and closing any background apps that may be causing the problem. If these solutions don't work, you can contact Apple support or take your device to a repair center to check for any hardware issues.

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