SCREEN SAVERS

   SCREEN SAVERS:

Screensavers were originally designed to 'save the screen' the monitor. Today, their function is primarily decorative. There are always parts of a computer screen that change less than others for example, the Start button. Earlier CRT monitors could be damaged by this, as electrons were constantly hitting that part of the screen. This damage could be anything from poor image quality and burnt lines to ghost images. Screensavers were designed to avoid these problems by replacing static images with dynamic (moving) images even a blank screen would do. Screen savers remain active until a user moves the mouse or presses a key. Today's monitors don't really need this protection, which has resulted in screensavers taking on a new role of entertainment. They can act as basic security tools as well; you can be set a screensaver to ask for a password when stopping it. This way you don't have to Log off or shut down your system every time you are called away from your computer, the screen saver automatically takes over after a specified time period, and can only be deactivated by your password. r fills it with moving images or patterns when the computer has been idle for a designated time. The original purpose of screensavers was to prevent phosphor burn-in on CRT or plasma computer monitors. Though most modern monitors are not susceptible to this issue (with the notable exception of OLED technology, which has individual pixels vulnerable to burnout), screensaver programs are still used for other purposes. Screensavers are often set up to offer a basic layer of security by requiring a password to re-access the device. Some screensaver programs also use otherwise-idle computer resources to do useful work, such as processing for volunteer computing projects. As well as computers, modern television operating systems, media players, and other digital entertainment systems may include optional screensavers.