0
How long does it take to burn an image into a rear projection TV screen?
Wiki User
∙ 13y ago
Rear projection televisions use a variety of technologies. The latest technologies are LCD and DLP which do not suffer from image burn. The older technology uses CRTs (cathode ray tubes) that are high brightness television tubes. These tubes are driven very hard to produce high light outputs and as a result, static images have been known to leave a permanent shadow on the tubes after a relatively short period.
The time taken for the effect to be seen varies greatly. In some instances, a one week old projector has shown signs of previous static images. In other cases, where static images are used only for short periods of time and are relatively low contrast, the effect isn't visible after many years.
To prolong the life of CRT projection tubes, avoid displaying static images for long periods. Do not over drive the brightness of the projector. Do not use static high contrast images and avoid computer generated images where the same image is shown in the same place repeatedly.
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
Why is there a boat floating on your Blu-ray screen?
Older TVs were prone to what was called a "Burn In" where if an image appeared on the screen for too long it would become burnt into the screen. Newer TVs don't have this problem, but these "Screen Savers" still exist as a legacy purpose.
What is burn-in?
Burn-in is the reason computer screensavers were invented. Burn-in happens when an image is displayed too long on a screen. This only happens with traditional CRT "tube" televisions and monitors and plasma TVs and monitors. It has been an especially big problem with rear-projection TVs. On these TVs and monitors, the tubes beam electrons onto the back of a phosphor-coated screen. If the images don't move for an extended period of time they can become permanently etched on the screen. FYI rear projection TVs now use light passing through an LCD. Burn in isn't nearly as big an issue with modern rear projection and LCD projection screens as it was with the older ones. It's also not nearly as big an issue as with plasma and LCD TVs, which have some pretty intense burn ins. The biggest problem you have to worry about with LCDs is dead pixels. Pixels die and just turn black, or sometimes white. The biggest problem with Plasmas is the fact that the actual plasma in the TV weakens over time and the brightness of the screen is drastically reduced over time. We have three at work that we bought about a year ago and they've lost approximagely 25-35% of their brightness already. LCD projection TVs have LCDs in them, so they can suffer from pixel death as well. Rear projection TVs without LCD projection can have their R, G, and B guns burn out - but those guns can be replaced (although it's sometimes expensive).
Will an LCD be hurt by leaving it on for too long What is the longest a LCD should be left on consecutively?
Many are aware that if you leave a static image for a prolonged period on a plasma TV, you may risk phosphor burn-in. The result is that once you remove the static image, you would still be able to see a faint outline, or ghosting of the original image, even when you change the picture content. LCD TVs do not suffer from burn-in, yet surprising as it may seem, they still suffer from image retention when a static or semi-static image is left displayed on the screen for too long. The intensity of image retention depends on various factors, not just the duration the static image remains displayed on the screen. Issues such as image makeup, operating temperature, and the LCD panel brand itself, should also be factored in.
Why does your monitor have a video on it when not in use?
I assume you are talking about the screen saver. In "traditional" monitors, the large bulky ones that are CRT or Cathode Ray Tubes they were sensitive to a stationary image being displayed too long. An image left stationary would 'burn' an image into the screen and effectively ruin the monitor. Screen savers were developed so that when left with a stationary image for a certain amount of time it would put up another moving image to preserve the monitor. Newer LCD or flat screen monitors don't need this as they use an entirely different process. Newer screens no longer need Screen Savers, but are kept largely for aesthetic reasons.
What is the primary purpose for a screen saver in Windows?
To save the screen.
Does the laptops need a screensaver?
NOT REALLY, Older displays used technology that used Phosphors that were charged to make colors display. When an image was on the screen too long the phosphors would sometimes "burn out" with the constant energy and leave that ghastly image on the screen called "BURN IN". A LCD screen uses a completely different technology, (liquid crystals that are charged). A LCD screen can sometimes get what is called "IMAGE PERSISTANCE" which kinda creates a ghost image on the screen. This is usually only a temporary problem which can be easily fixed. The best way is to make a background that is completely white and have the screen display that for a few hours. When you do this you can bring up the brightness on your display to its max setting. This should solve any persistant images on the screen. SO.... a screen saver wouldn't hurt, but it won't cause as many problems as going without used to. Hope this helps Cheers
Can LCD screens experience pixel burn in?
Yes, they can. I've seen it in my repair ventures, but it's very, very seldom that it happens. It's also not known as ghosting, but is known as burn-in. Ghosting is what's known as another image that appears on the screen, the same as the one you're watching. It can be very close to the original images or a few inches away from the original image. This is usually cause by a reflection in the signal path, allowing the same signal to be received a bit later than the original, or it can occur in the cables used to connect the TV. LCD (Liquid Crystal Display) screens do not experience pixel burn-in, also known as "ghosting" like older plasma models could. Pixel burn-in occurs when an image is left on the television for a long period of time. When the TV is later turned off, the image that was previously on the screen can be faintly seen on the screen, known as ghosting.
Can an image burn into the screen on a plasma television?
It can happen, but is unlikely. If you adjust your televison sets brightness down, then this won't be anything to worry about. It is smart to not leave electronics running for a long time without use, as it can wear them down, but this is an uncommon problem.
A month back my close neighbor bought a sony 3D TV and they have some issue like burn-in static image So as I too want to get a 3D TV how will I avoid this problem?
Image burn is a feature of plasma televisions but it is almost impossible to see it after just one month. Don't keep static images on a plasma screen for long periods of time and this problem will never appear.
What is a purpose of a screensaver?
Back in the day, older CRT monitors had a problem with memory-effect -- if you left an image or text in the same position on the screen long enough, it would "burn into" the screen. Even if you turned the monitor off, you could still see the burned-in images. To prevent this, screen savers change the display on a more or less random basis. It's not as great a problem with LCD monitors, but a better solution exists -- use the power-saver option of the monitor to shut the screen down when it's not in use. Not only does this preserve the screen, it also saves energy and money.
Does LED Plasma still have issues of burning the image into the screen?
Plasma televisions use phosphors to generate visible light. Although the technology is different to older CRT based televisions, the phosphor is common to both of them. Plasma televisions gained a poor reputation when they were first introduced because static images could cause phosphor burn in a short period of time. Phosphor burn is caused by high brightness levels on certain parts of the screen with the result that the phosphor is no longer as effective as it was, showing a dark shadow of the image that was left on the display for too long. Since their introduction, the screens are far more stable and phosphor burn is not as much of a problem as it was. Despite the improvements, showing a high contrast static image for long periods of time can still cause image burning. For domestic use, this shouldn't be an issue.
Can using an lcd tv for gaming use ruin it and does it need to be given breaks during use?
Playing for too long on ANY TV is a bad idea (for you, the console and the TV) however, modern LCD TV's won't really be affected by long use. You MIGHT get burn in if you leave the screen on the same image for long periods of time (ie the pause screen) but otherwise, you're good to go.
