![]() ![]() If only all of our technology problems could be wiped away like so much dirt.Dboy999: Growing up here, and in the Parkside specifically, this f-ing sucks. If you happen to fall into this filthy category, follow your manufacturer's recommendations for cleaning the screen, and be glad for such an easy solution. There's literally too much dust on the screen. In some cases, there's nothing wrong with the product at all. Lastly, once in a while in online forums, users will complain of a hazy effect that they see when watching their favorite movies. If your screen is tilted away from your eyes, or if it's not at eye level, you're more likely to see vignetting or blotchiness. Alternately, in very bright rooms, cranking the brightness to max might be your best bet. You might also find that installing bias lighting behind the TV helps to minimize the annoyances of DSE. If your viewing room is very dark, you may benefit from turning down the display's brightness. Some TVs are equipped with variable brightness controls. In general, the overall picture quality isn't quite as good as a backlit screen, but manufacturers still use it because it allows them to build substantially slimmer TVs.įurther trial and error may also improve your circumstances. Other models incorporate what's called edge lighting, which positions the LEDs along the edges of the screen. Some models have what's called full-array backlighting, in which the LEDs are stationed in regular intervals behind the screen, creating even lighting and excellent picture quality. More modern TVs rely on LEDs (light-emitting diodes) as a light source. They provide generally smooth and even illumination, but they make the final product rather bulky. Older LCD TVs, for example, used multiple cold cathode fluorescent lamps (CCFL) to light LCDs from the rear. There are a variety of factors that affect LCD quality, notably illumination source. ![]() What's important to realize is that both categories rely on LCDs (liquid crystal displays), which act as shutters that either block light or allow it to pass, depending on the image that's being rendered on the screen. LED units could be more accurately described as "LED-backlit LCD televisions," but salespeople and consumers alike are too lazy to utter that tongue-wearying phrase while haggling in a big-box store. Before we proceed, it's worth mentioning that although marketing-speak often treats LED and LCD TVs as completely different technologies, they're not different beasts. In LCD and LED TVs, DSE is typically a bigger issue, one that's due to the way these units are illuminated. Furthermore, as the display ages, the phosphors in the screen may begin to wear out or malfunction, all of which can contribute to less uniform images, which is often apparent particular in scenes with fast panning shots. Still, DSE may afflict cheaper versions, particularly if the anti-reflective coating on the glass that overlays the screen is of low quality or poorly applied. This tends to make DSE less visible in these devices, particularly in high-end models. ![]() If you own a plasma TV, the pixels are individually illuminated and all capable of achieving the same level of brightness. A vast majority of TV watchers will never notice this lack of uniformity, which is visible mostly in specific circumstances: during moments of bright colors or whites (such as during snowy white or desert scenes), or when the screen should look entirely black or gray but instead shows uneven, cloudy splotches and sometimes stripes or banding. This is commonly called the dirty screen effect and to varying degrees it's evident in every flat-screen LED/LCD and plasma TV on the market.ĭirty screen effect, or DSE to TV geeks, refers to a lack of uniformity in solid colors displayed on LED/LCD and plasma televisions. But for those of you who are intrigued by the inner workings of your high-tech television and wonder why images may look just a bit grayish sometimes, this story's for you. Spoiler alert: if you really love your pricy flat-screen TV, with its brilliant colors and perfect contrast, stop reading - because we don't want to ruin it for you. Dirty screen effect, or DSE to TV geeks, refers to a lack of uniformity in solid colors displayed on LED/LCD and plasma televisions. ![]()
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