A completely black screen is the ultimate tool for focus and energy saving. For users with OLED or AMOLED displays, a pure black screen turns off the individual pixels entirely, saving significant battery life on mobile devices or laptops.
It is also widely used by multi-monitor users who want to 'turn off' a secondary display without actually powering it down or messing up their window arrangements. A black screen reduces glare and eye strain in dark environments.
If you have an OLED or AMOLED display, yes! These screens turn off pixels completely to display pure black, which saves battery. On traditional LCD screens, the backlight stays on, so the battery savings are minimal.
Turning a monitor off can cause your operating system to rearrange all your open windows. A black screen keeps the monitor active to the OS while appearing dark to you.
Simply press the 'Escape' key or click anywhere to bring up the control bar, then click the back arrow.