How long plasma break in

Due to uneven wear on the phosphors, if you let a static image sit on your screen for too long, that image can end up leaving a ghost of itself behind--it appears burned in to the screen.

The biggest potential for burn-in occurs when you have a high-contrast image -- such as bright text set against a dark or black background -- because some pixels are turned on to the max while others nearby are completely turned off.

A good example is when you watch aspect video on a widescreen display and have black bars framing the image on either side the pillarbox effect. Also, you get black bars on the top and bottom of a picture when you watch 2. Then, of course, there are the news and stock tickers that run across the bottom of the screen when you watch various news channels, including Bloomberg, CNN, and ESPN.

Watch TV for a few hours with those images sitting there, and you could end up with an after-image of the bars or the ticker visible on other scenes.

These after-images will be most evident when you're watching a brighter scene with the picture filling the whole screen. Why is burn-in much less of an issue than it used to be? For starters, many new plasmas include burn-in reduction features, such as screensavers and "pixel shifting" that help prevent burn-in. Some of these features are invisible to the viewer. For instance, newer Panasonic plasmas call it "pixel wobbling", while Pioneer Kuro plasmas have something called "pixel orbiting", but both do the same thing: They ever-so-slightly shift the image on the screen a pixel or two at set intervals.

The shift is virtually unnoticeable. Many sets also have settings for treating burn-in should it occur. Often, this involves simply blasting the screen with a white image from several minutes to hours, which usually eradicates the ghost. Are TV broadcasters and cable and satellite service providers doing their part to prevent burn-in?

Most TV broadcasters and cable and satellite service providers are quite aware that there are a lot of plasma owners out there, and they've taken steps to help you avoid burn-in.

Some hardware, such as the upcoming TiVo DVR and Pioneer's plasma range, gives you the option of changing those pillarbox bars from black to grey, which keeps the pixels within the bar turned on and thus helps prevent burn-in.

In a lot of cases, broadcasters are also pretty good about moving things elements such as tickers or station logos around -- or removing them altogether -- to make sure static images don't linger too long.

That said, some broadcasters seem to do a better job than others in this regard. Are there some simple tips to follow to prevent burn-in? He personally has a three-year-old inch plasma at home and notices that, after his wife watches the TV in the mode with black bars on either side of the image for hours on end with no widescreen shows, he sometimes detects those after-images of the bars.

Worst case, stretch out that TV or movie so it fills the screen oh, the horror, I know. And again, this is just for the first month or so. This also constitutes abnormal. Video games are another problem. While the game itself is a lot of varied motion and brightness, the user interface at the bottom of the screen the HUD if you will is static. Static is bad. So if you just bought a new plasma so you can play 50 hours straight of Mists of Pandaria , your Panda love might lead to some severe image retention.

If that happens, watch something else for a while. I'm not going to recommend specific test patterns or any such nonsense. It's not needed, and borders on OCD. Just watch the TV like a TV. Bottom line Talk of burn in is largely fear mongering. I review plasma TVs all the time, and never have a problem, despite playing games on them.

That said, I also know all the details of how they work, so I know not to only play games or only watch 2. So for the first hours or so less than a month for most people , don't just watch one thing. It's that easy. The reality is, modern plasmas are significantly more resilient than old models.

So when you hear someone freaking out about plasma "burn in," ask them when was the last time they owned a plasma. I played some Day Z on a high-end plasma I recently reviewed just a few hours after taking the TV out of the box, and even after several hours of play, I saw no signs of image retention. They've gotten that good, or at least some have. Like I mentioned in the burn in article , you're going to see image retention long before it's a serious issue.

During the donation, if a person has either a large bruise or a small bruise that occurs with pain, the attendant should stop the donation and apply a cold compress. The person may benefit from continuing to apply cold compresses for the next 12—24 hours and warm compresses after that.

If bleeding occurs, the person should apply pressure to the area and raise their arm. If symptoms worsen or the bleeding does not stop, seek medical attention right away. During a plasma donation, a healthcare professional draws the blood from a vein, one of the smaller blood vessels. If they accidentally puncture an artery instead:. If this happens, the attendant will stop the donation immediately and apply firm pressure to the area for at least 10 minutes.

Emergency medical help may be necessary. A person may attend a follow-up to ensure that any associated issues receive appropriate attention. Citrate is a substance added to the blood during plasma donation to prevent clotting. Some people have a reaction to this substance. One study has suggested that citrate could affect bone density, as it binds to calcium.

However, other research does not appear to confirm this. This medical term refers to the destruction of red blood cells, which can happen during a plasma donation. The damage can cause hemoglobin, a protein in red blood cells, to leak into the bloodstream. This can cause the plasma to turn pink and the blood to be darker than usual. Also, a person may see blood in their urine.

If the attendant notices signs of hemolysis, they will stop the procedure and may call for additional help. Sometimes, an air bubble can enter the bloodstream during apheresis. This may occur, for example, if there is a problem with the machine. If a bubble reaches the lungs or brain, it can become life threatening.

It takes longer to donate plasma than blood. Overall, donating plasma takes around 1 hour and 15 minutes , though the procedure itself only takes about 40 minutes. Also, on their first visit, a person should plan to spend extra time registering and filling out paperwork. The body replaces the donated plasma within 48 hours , in a healthy adult. Eat something : Having a small meal or a snack beforehand can reduce the chances of feeling dizzy or lightheaded during or after the donation.

Take it easy : It may be a good idea to rest, or at least avoid strenuous activity, for the rest of the day. Donating plasma is usually safe. Still, to ensure high standards of care and hygiene, only donate at accredited centers.