what is the use of a screen saver?

Answer 1

A screensaver is a computer program originally designed to conserve the image quality of computer displays by blanking the screen or filling them with moving images or patterns when the computers are not in use. Today, screensavers are primarily used for entertainment or security purposes.

Before the proliferation of LCD screens, most computer screens depended on cathode ray tubes (CRTs). Images on a CRT monitor are generated using electron beams which are emitted from electron guns at the back of the tube, and manipulated by electromagnetic fields to form images line-by-line on the phosphorescent screen many times per second. In some situations the images displayed on the screen constantly change, but in other cases some areas of the screen, or the screen as a whole, change very little (the taskbar in Microsoft Windows, for example). When the same image is displayed on a CRT screen for long periods of time, the properties of the exposed areas of phosphor coating on the inside of the screen gradually and permanently change, eventually leading to a darkened shadow or "ghost" image on the screen. Televisions, oscilloscopes and other devices that use CRTs are all susceptible to phosphor burn-in, as are plasma displays to some extent.

Screensaver programs were originally designed to help avoid these effects by automatically changing the images on the screen when the computer was not in use (thus "saving" the screen). They can be usually set up to launch automatically, waiting a specified amount of time after the last keystroke or the last mouse movement made by a user. The screensaver then blanks the screen, or more commonly produces animation effects, thus avoiding any "fixed" images. The screensaver remains active until a user presses a key or makes a mouse movement. At that moment, the screensaver closes and the former screen contents are restored, allowing the user to work again.

For CRTs used in public embedded applications such as ATMs and railway ticketing machines, the risk of burn-in is especially high because a stand-by display is shown whenever the machine is not in use. Older machines designed without burn-in problems taken into consideration often display evidence of screen damage, with images or text such as "Please insert your card" (in the case of ATMs) visible even when the display changes while the machine is in use. Blanking the screen is out of the question as it would make the machine look out of service. Thus, in these applications, burn-in is prevented by moving the contents of the display around every few seconds, or by having a number of different images that are changed regularly.

Modern CRTs are much less susceptible to burn-in than older models due to improvements in phosphor coatings, and because modern computer images are generally lower contrast than the stark green- or white-on-black text and graphics of earlier machines. LCD computer monitors, including the display panels used in laptop computers, are not susceptible to burn-in because the image is not directly produced by phosphors (although they can suffer from a less extreme and usually non-permanent form of image persistence). For these reasons, screensavers today are primarily decorative or for entertainment, and usually feature moving images or patterns and sometimes sound effects.

Answer 2

The tube maintains to be on even once you're making use of a demonstrate screen saver. as long because of the fact the tube is on then it consumes power. The demonstrate screen saver in basic terms makes specific that the tube does not develop into etched with a definite photograph or words. If this have been to ensue then the tube could could get replaced. for this reason the photograph from a demonstrate screen saver strikes around continuously. to shop power turn the set off off each and every time no longer in use.

Answer 3

Screensaver programs were originally designed to help avoid these effects by automatically changing the images on the screen when the computer was not in use (thus "saving" the screen). They can be usually set up to launch automatically, waiting a specified amount of time after the last keystroke or the last mouse movement made by a user. The screensaver then blanks the screen, or more commonly produces animation effects, thus avoiding any "fixed" images. The screensaver remains active until a user presses a key or makes a mouse movement. At that moment, the screensaver closes and the former screen contents are restored, allowing the user to work again.

Modern CRTs are much less susceptible to burn-in than older models due to improvements in phosphor coatings, and because modern computer images are generally lower contrast than the stark green- or white-on-black text and graphics of earlier machines. LCD computer monitors, including the display panels used in laptop computers, are not susceptible to burn-in because the image is not directly produced by phosphors (although they can suffer from a less extreme and usually non-permanent form of image persistence). For these reasons, screensavers today are primarily decorative or for entertainment, and usually feature moving images or patterns and sometimes sound.

Answer 4

the screen saver was initially a time pass affair when not in use people used to enjoy but lately it became a essential one because it has two main purposes
1. when u are away your work wont be noticed by colleague or friend , 2. the computer screen is vulnerable for etching the letters on the display area. thus by using screen saver this computer display can be maintained with out scares or marks like punch marks. in fact it is an aide to save screen.

Answer 5

A screensaver is a computer program originally designed to conserve the image quality of computer displays by blanking the screen or filling them with moving images or patterns when the computers are not in use. Today, screensavers are primarily used for entertainment or security purposes.

Before the proliferation of LCD screens, most computer screens depended on cathode ray tubes (CRTs). Images on a CRT monitor are generated using electron beams which are emitted from electron guns at the back of the tube, and manipulated by electromagnetic fields to form images line-by-line on the phosphorescent screen many times per second. In some situations the images displayed on the screen constantly change, but in other cases some areas of the screen, or the screen as a whole, change very little (the taskbar in Microsoft Windows, for example). When the same image is displayed on a CRT screen for long periods of time, the properties of the exposed areas of phosphor coating on the inside of the screen gradually and permanently change, eventually leading to a darkened shadow or "ghost" image on the screen. Televisions, oscilloscopes and other devices that use CRTs are all susceptible to phosphor burn-in, as are plasma displays to some extent.

Screensaver programs were originally designed to help avoid these effects by automatically changing the images on the screen when the computer was not in use (thus "saving" the screen). They can be usually set up to launch automatically, waiting a specified amount of time after the last keystroke or the last mouse movement made by a user. The screensaver then blanks the screen, or more commonly produces animation effects, thus avoiding any "fixed" images. The screensaver remains active until a user presses a key or makes a mouse movement. At that moment, the screensaver closes and the former screen contents are restored, allowing the user to work again.

For CRTs used in public embedded applications such as ATMs and railway ticketing machines, the risk of burn-in is especially high because a stand-by display is shown whenever the machine is not in use. Older machines designed without burn-in problems taken into consideration often display evidence of screen damage, with images or text such as "Please insert your card" (in the case of ATMs) visible even when the display changes while the machine is in use. Blanking the screen is out of the question as it would make the machine look out of service. Thus, in these applications, burn-in is prevented by moving the contents of the display around every few seconds, or by having a number of different images that are changed regularly.

Modern CRTs are much less susceptible to burn-in than older models due to improvements in phosphor coatings, and because modern computer images are generally lower contrast than the stark green- or white-on-black text and graphics of earlier machines. LCD computer monitors, including the display panels used in laptop computers, are not susceptible to burn-in because the image is not directly produced by phosphors (although they can suffer from a less extreme and usually non-permanent form of image persistence). For these reasons, screensavers today are primarily decorative or for entertainment, and usually feature moving images or patterns and sometimes sound effects.

the screen saver was initially a time pass affair when not in use people used to enjoy but lately it became a essential one because it has two main purposes
1. when u are away your work wont be noticed by colleague or friend , 2. the computer screen is vulnerable for etching the letters on the display area. thus by using screen saver this computer display can be maintained with out scares or marks like punch marks. in fact it is an aide to save screen.

Answer 6

In the old days the images of what ever was on the screen be it icons, games,or a document would be burnt on to the screen. With today's modern equipment it no longer does that, but people do not like change and hold on to the practice. Now days it is more personal satisfactionor showing off your interest telling people who or what you are! God bless you and the Southron People.

Answer 7

The older type of computer screen, CRT or cathode ray tube (not unlike your TV picture tube) can burn an image in the phosphor coating on the inside of the glass because your desktop doesnt have any motion like a tv set does. If you let it sit too long it will burn a permanent image on your screen.

Answer 8

It used to keep screens from burning the image permanently into them, but today's monitors don't have a big problem with this. Plasma screens do though if you run a program on them for a couple of days without turning them off.

Answer 9

If you leave your monitor on and don't use a screensaver the icons on the desktop can "burn" into the screen. Save your screeen and use a saver OR turn your monitor.

Answer 10

to save ur crt based monitor fronm burning out,not very useful now,in older days the power management control was not too good(it hardly worked)so u have screeen savers to prevent ur crt from getting burnt out from inside