via PiMyLifeUp
By default, Raspberry Pi OS uses screen blanking to hide the screen after a certain amount of time has passed. This method, simply put, stops video from being output by the Pi’s graphics processor.
If you prefer that your display remains on but still want the contents of the display hidden, you can use a screensaver.
A screensaver was originally designed to prevent burn-in from occurring on a CRT monitor by constantly changing what is being displayed. If you have ever looked into OLED displays, you will be familiar with burn-in as they face a similar issue.
Each Friday is PiDay here at Adafruit! Be sure to check out our posts, tutorials and new Raspberry Pi related products. Adafruit has the largest and best selection of Raspberry Pi accessories and all the code & tutorials to get you up and running in no time!
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