The screen brightness on my OLED TV suddenly changes

IMPORTANT: This article applies only to specific products and/or operating systems. Check Applicable Products and Categories for details.

If your TV screen's brightness suddenly changes (gets brighter or darker), you may need to adjust your TV's Display settings.

Check the Light sensor setting

Depending on your model, check the Auto luminance level, Ambient light sensor, Light and Color sensor, or Light sensor settings. If the sensor setting is On, the brightness of the TV screen changes to match the ambient lighting. 

To access these settings, follow the steps below:

1. Open the  Settings screen. How to access Settings
   • If the remote control has a Quick Settings ( or ) button, press the Quick Settings button and select Settings.
   • If the remote control does not have a Quick Settings ( or ) button, press the HOME button and select Settings.
2. The next steps will depend on your TV menu options:
   • Select Display & Sound → Ambient Optimisation Pro → Auto adjust according to ambient light → Advanced settings → Auto luminance level.
   • Select Display & Sound → Picture → Ambient light sensor or Light sensor → Auto luminance level.
   • Select Display & Sound → Picture → Light and Color sensor → Brightness.
   • Select Display & Sound → Picture → Light sensor.
   • Select Display → Picture → Light sensor.

Notes: The Ambient light sensor or Light sensor is located near the centre of the bottom part of the TV screen.

Check the Peak Luminance setting

If an image that is likely to cause image retention is displayed on the screen, the brightness gradually dims to protect the TV. The brightness returns to normal if you change the screen or perform another action that eliminates the risks of image retention.

If you want to manually reduce the brightness, simply lower the Peak Luminance setting:

1. Open the  Settings screen. How to access Settings
   • If the remote control has a Quick Settings ( or ) button, press the Quick Settings button and select Settings.
   • If the remote control does not have a Quick Settings ( or ) button, press the HOME button and select Settings.
2. The next steps will depend on your TV menu options:
   • Select Display & Sound → Picture & Sound → Picture → Brightness → Peak luminance → Medium or Low.
   • Select Display & Sound → Picture → Brightness → Peak luminance → Medium or Low.
   • Select Display & Sound → Picture → Advanced settings → Brightness → Peak luminance → Medium or Low.
   • Select Display → Picture → Advanced settings → Brightness → Peak Luminance → Medium or Low.

Notes:  The brightness dims more frequently on screens with bright, still images, such as the HOME screen and the app's top screen.