My OLED TV screen suddenly gets brighter or darker

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

If your TV screen brightness suddenly changes, check the following:

• Check the 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.

  Check the following:

  1. On the supplied remote, press the HOME button.
  2. Open the Settings screen
     • Using the Quick Settings button (For models released in 2019 or later)
       • Press the (Quick Settings) button on the remote control.
       • Select the Settings icon.
     • Using the HOME button
       • Press the HOME button.
       • Select the Settings icon.
     • This step will depend on your TV menu options:
       • 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.

• Change the channel or the input source to see if the brightness returns to normal. When an image is displayed on the screen that may easily cause image retention, the screen brightness gradually reduces in order to protect the TV from image retention. The brightness returns to normal if you change the screen or perform another action that eliminates the risks of image retention.

  Note: This function activates frequently because the HOME screen and the top screen apps contain bright still images.
  1. Open the Settings screen
     • Using the Quick Settings button (For models released in 2019 or later)
       • Press the (Quick Settings) button on the remote control.
       • Select the Settings icon.
     • Using the HOME button
       • Press the HOME button.
       • Select the Settings icon.
     • This step will depend on your TV menu options:
       • 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.