For every one of a certain age has a favorite screensaver, ranging from the classic display where blobs rebound off the screen, approaching ever closer to the corners, to variations featuring slightly distinct blobs engaged in identical actions.
Even today, these screensavers continue to be used, yet unlike the vintage blobs and the sinuous line that meanders across the screen, they no longer serve a purpose.
Hence, what was the initial intent behind screensavers? As the name suggests, it aimed to save your screens.
In the case of earlier cathode ray tube (CRT) computer monitors and televisions, prolonged display of the same image could result in a phenomenon known as screen burn-in, imprinting a lasting phantom image of the displayed content.
In the context of television broadcasting, when channels would cease airing overnight and display a test card, leaving your set on could lead to that card being indelibly etched on your screen
The persistent exhibition of a singular image resulted in the degradation of the phosphor coating on the screen's interior, causing it to burn in and impair regular functionality. This rendered the screen incapable of being reactivated to present a fresh image. The remedy involved the activation of a screensaver that would engage after a designated duration, continuously altering the content being displayed.
While the original function of screensavers is no longer relevant, individuals still employ them for their alternative advantages, like concealing their on-screen content from inquisitive coworkers or family members.
