4 Ways To Stop Brightness From Changing Automatically On iPhone!

Nothing can be more annoying than your display brightness suddenly changing on your iPhone, especially when you are watching movies or playing games. Luckily there are many ways to fix this issue like turning off auto brightness, disabling True Tone, and adjusting the brightness manually.

To stop the brightness from automatically change on your iPhone, go to Settings > Accessibility > Display & Text Size. Scroll to the bottom of this page and toggle off the Auto-Brightness option.

However, sometimes the brightness can go up and down even with the auto-brightness turned off. In this article, I’ll guide you through all the different ways you can stop your iPhone from changing brightness automatically. Let’s get going.

What Is Auto Brightness On iPhone?

Auto brightness is a common feature on all iPhone models which automatically adjusts the screen brightness based on the surrounding light. This feature immediately darkens the screen in bright light and makes it lighter in low light.

The auto brightness feature works by using a sensor which uses ambient light sensing to determine how bright the screen should be to offer the best visibility while preserving battery life.

This feature has some great advantages like it saves your battery life as high brightness can reduce battery life. Moreover, if the brightness level on your screen is too high, especially at night, it can put serious stress on your eyes.

How To Stop Brightness From Changing On iPhone?

Even though auto brightness on the iPhone comes with its own advantages, sometimes without any reason the screen can become dim even under bright sunlight. This can be seriously irritating for any iPhone user but luckily this can be fixed.

Turn off Auto Brightness

Turn off auto brightness

When the auto brightness option is turned on it will automatically dim or brighten the display. Therefore, you must turn off this function if you wish to stop your display from constantly attempting to adapt.

To turn off the auto brightness, go to the settings menu and scroll below to select “Accessibility

Inside the “Accessibility” you will find many different options; select “Display and Text Size”. Once you are inside of this option you will need to scroll down and toggle the Auto brightness bar to turn it off.

Adjust the Brightness Manually

Adjust the brightness manually

Once you turned off auto brightness on your iPhone, you will need to adjust the brightness manually. On your iPhone pull the control center menu down and look for the “Sun” looking icon. Now slide the bar and select the display brightness as per your requirements.

Disable True Tone

If you are using an iPhone from iPhone 8 to the latest 14 pro max, your phone comes with the True Tone feature. True Tone alters the color temperature of the display depending on the surrounding illumination.

Disable True Tone

So, when it is turned on, your display’s brightness will be automatically adjusted just like auto brightness. To run off the true tone on your iPhone follow the process below.

Go to settings on your iPhone and scroll below and select display and brightness. Inside this you will see an option “True Tone”. Slide the toggle to turn it off.

Turn off Night Shift

After turning off auto brightness and True Tone if your iPhone’s brightness is still changing automatically, then it may be because of night shift. To ease eye strain and enhance the quality of sleep, Night Shift dims the blue light generated by the screen.

Turn off Night Shift

So, as a result the display can automatically become dimmer; to turn off the night shift go to the settings on your iPhone. Inside the settings, select “Display and Brightness”. Look for Night Shift, if it is on, simply turn it off.

Why Does My iPhone Screen Keep Dimming With Auto Brightness Off?

Auto brightness isn’t always the main reason for dimming your iPhone screen. So, If your iPhone’s auto brightness feature is turned off but still the screen keeps dimming something else might be triggering this.

iPhone is Overheated

When your phone overheats it can cause many issues on your iPhone so it is designed in such a way that it will try to protect the components inside of your phone.

One such protective method is dimming the brightness on the display. When this happens you should let your phone cool down before you start to use it again. According to Apple, you should only use your iPhone where the temperature rangesOpens in a new tab. between 0 to 35 degree Celsius.

Low Power Mode is Turned On

Low Power mode is turned on

Another common reason for your iPhone screen to keep dimming with auto brightness off is low power mode is enabled. The iPhone’s Low Power Mode is intended to save battery life. The brightness of the iPhone’s screen will be reduced when Low Power Mode is activated.

So, to ensure low power mode doesn’t lower the brightness on the screen on your phone you must turn it off. Enter the settings on your iPhone and select “Battery”.

Inside the battery, you will see “Low Power Mode”; toggle the slider to turn it off.

True Tone and Night Shift is Turned on

As you already know, the brightness can also be affected when the true tone and night shift is turned on in your iPhone. So, turning off auto brightness only will not be enough if you do not want your iPhone’s display to get dimmed automatically.

Turn off the night shift as well as the true tone and the problem should get fixed.

Too Dark Screen Protector

The primary job for any screen protector is to protect the display on your iPhone especially during falls. There are many types of screen protectors available for your iPhone.

Among these privacy and matt screen protectors are really popular. However as these protectors are made to obscure the view of the screen from specific angles, they might make the display look a little darker or less colorful.

Frequently Asked Question

When the display on your iPhone dims suddenly you might think it is due to some internal problems. However, it’s merely because of some settings on your phone. Our FAQs below will help you understand these settings more easily.

Why does my brightness keep going down when Auto brightness and other related settings are off?

Even if True Tone and Night Shift are disabled and the screen still dims on its own, consider turning off the Attention-Aware Features. This will allow you to manually regulate the screen’s brightness. Additionally, make sure that your screen doesn’t have a case or cover that might obstruct the proximity sensor.

Why does my iPhone auto dim after 30 seconds?

In order to prevent unauthorized access, the iPhone is initially designed to automatically lock after a certain period of inactivity, such as 30 seconds. Thus, the screen will begin to dim after a short while of inactivity. However, you change this preset time according to your preferences from the settings, display and brightness and auto lock.

Can I manually set the screen brightness on my iPhone and have it stay fixed?

It is possible to manually set the screen brightness on your iPhone and it will remain fixed if you follow the steps properly. Before setting the screen brightness, make sure to turn off the auto brightness and enter the display and brightness option on the settings. Inside it, slide the brightness slider to your required brightness and it will stay fixed.

How do I put a low light filter on my iPhone?

Your iPhone’s low light filter is a practical accessibility feature that you can use as a shortcut to turn down the screen’s brightness. Use the Zoom Function on Your iPhone to Turn on the Low Light Filter. Locate the Zoom function under the Accessibility features section in the Settings on your iPhone. Inside the settings select low light and this will turn on the low light filter.

Final Words

iPhones are known for their crisp and sharp display but due to some factory settings, your display can dim automatically. The display can also dim when you are trying to take a good photo or a video. Luckily none of these are serious issues and can easily be solved by altering a few different settings.

However, if your display is still causing issues after trying these fixes you will need to visit an Apple service center as there can be internal issues with the screen.

Md Mehedi Hasan

Hello, Mehedi here! I love Apple devices and everything that comes with it. I've been using iPhones from the early days of iPhone 5s, and since then, I've kept myself updated with the latest Apple updates, accessories, different issues, and their fixes. I truly believe that every issue with iPhones can be fixed, and you'll find these solutions here at Techiaid.

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