Want to know about the screen saver what is there function?

Question

Why do I need a screen saver I want to know how does the picture on the screen of my computer save it.

Answer 1

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

Purpose

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.
Mac OS X Screen Saver
Mac OS X Screen Saver

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 from burn-in). 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 the machine would appear to be out of service. In these applications, burn-in is prevented by shifting the position of the display contents 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.


One increasingly popular application is for screensavers to activate a useful background task, such as a virus scan or a distributed computing application (such as the SETI@home project). This is convenient because these applications only use resources when the computer would be otherwise idle.

Answer 2

The screen saver came about because the monitors would mark the screen. The old t.v.v where made of cathode ray tubes. If you lefty a still image on the screen the image would get burnt into the screen. It then became very annoying and the screen did not look good. This is when the screen saver came about. All a screen saver is is a moving object on the screen. As long as the image is moving the screen the rays won't stay in one position long enough to burn it.

I don't know if this still hold true today because monitors and new t.v.s are now being made out of different technologies. i.e plasma, LCd etc etc.

Be weary of screensavers you download from the web. A lot of them contain viruses, or spyware. Just used the screen saver included with your P.C. or just turn the screen off.

Answer 3

Screen savers used to be necessary because if the same picture stayed on a screen for a long time it would "burn" that picture on the screen, so you would always see it when you were trying to use the computer. Nowadays, with modern monitors, this doesn't happen, but I guess people just think they're cool. You don't need one, but you can put one if you want.
It doesn't "save" the picture that was on the screen; the "saver" referred to how it saved the monitor from having an image burned onto it.

Answer 4

You don't need a screensaver if you shut down your pc / laptop after using it. Screensavers are (programs) designed to protect your screen from an image being "burned" into the screen. When any image exists for long period of times on your screen, they could become permanently engraved into your screen (you'd always see some of that image). Screensavers keep images changing periodically (you usually sets the time period) or they may just make the screen blank. The screen doesn't save the picture, it's a program that runs, like any other program.

Answer 5

It's not as much of an issue these days, but it still happens.

When you have a computer screen, especially with the old green/black kind with just writing on them, it can sometimes have a static image displayed for long periods of time.

If you left the same image for a long time, it would be there faintly even when it wasnt supposed to be.

Some cheaper old tvs did this too. Newer plasma tvs can sometimes do this (like with a stock ticker, or channel logo).

The screensaver gives it random images to display, so it isnt showing the same thing all of the time, and burning the image into your screen.

Answer 6

this would properly be a snap. suitable click everywhere on the laptop opt for residences from the drop down menu - opt for the screensaver tab and you have finished administration over your screensavers

Answer 7

first are you serious but if you dont know if you leave your screen on with out moving images or opeing windows it will burn on your screen

Answer 8

try to screensever.com