For the blue light filter (comfort view), a schedule can be set in addition to manual activation/deactivation, or the filter can be automatically controlled from sunset to sunrise.

Android 9 | LG UX 9.0
Step 1:  Open the  Settings
Step 2:  Tap on  Display
Step 3:  Tap on  Comfort view
Step 4:  Tap on  Schedule
Step 5:  Enable or Disable  Schedule
Step 6:  Choose between  From sunset to sunrise  and  Set time
  1. Open the Settings
  2. Tap on Display
  3. Tap on Comfort view
  4. Tap on Schedule
  5. Enable or Disable Schedule
  6. Choose between From sunset to sunrise and Set time

LG Instructions
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