Why are screensavers necessary?

Answer 1

Computers these days do not need a screen saver at all, the monitors and screens have developed since the start. Originally the screens used to be CRT green screens which displayed the characters and information by sending a beam of light against a florescent background. When the computers were left displaying the same information time and time again (say when the user needed the toilet/coffee or even lunch breaks) the repeated image was burned into this florescent screen. So even when you were displaying other information you could still see the burned image in the background. To prevent this newer systems allowed the use of s program that blanked out the screen when the computer had not been used for a set time, this saved the 'burn' of the image. Hence the screen was saved - thus a screensaver. Today a screensaver is used primarily to prevent other users/information being accessed without authority. Most screensavers have a password protection.

Answer 2

If you have a monitor that uses a cathode ray tube (CRT), and you display the same unmoving image for a long time, you will damage the phosphors in the screen, so that a ghostly image will be permanently burned into the screen. However, this problem does not happen with the more modern liquid crystal displays (LCD) so screen savers are not as necessary as they once were. They can still be fun to look at.

Answer 3

In the "Old days" of computers (say, 10+ years ago), screen savers were important to keep the same image from staying on the screen so long that it burned in.

However, with the new LCD flat-panel displays, image burn-in doesn't happen like it used to (however, plasma displays are susceptible to image burn-in).

However, from a security standpoint, if you are in a work environment working with sensitive information (such as health care or banking), a screen saver with a password is a good idea to keep someone from sitting down at your computer while you're up getting a cup-o-joe or going to the bathroom.

Answer 4

There are multiple purposes:

1) to protect your screen from burnout,

2) keep prying eyes off your programs (or make it harder), and

3) sometimes it can look really good! :D

Answer 5

According to my knowledge this is because screen savers increases the life of your monitor

Updated 6/7/10

your knowledge is correct

Answer 6

It keeps the computer screen from being burned of a still image on the glass because of the radiation of the catharay tubes.

Answer 7

because it expresses your self and shows things that you like and doesn't look dull.

Answer 8

for entertaiment purposes

Answer 9

to keep other peoples from coming in