We’ve always noticed an intriguing fact about our TVs: with every signal error or possible glitch, colored bars immediately appear on the screen. This still sometimes happens at the end of a stream. This frozen image (pattern) is now anchored in our minds. But do you know its origin? Many people don’t know why these colored stripes suddenly appear on the screen. If you are one of them, we will unravel this mystery for you.
Look: Where do these colored bars come from on the TV screen?
There is no signal on television – Source: spm
Since the advent of televisions, test charts have always been around. For those of you who don’t know, this type of colored image was used to adjust the TV screen which then had an antenna at the time. The most famous of these images was the one created in 1938 by RCA (a company that sold electronic products): it was easily recognizable as it showed a small image of an American Indian.
The RCA Chart – Source: spm
Subsequently, the appearance of color television will mean a change in the design of these models. Then SMPTE color bars, the invention of Norbert Larky and David Holmes, will be adopted. This is a very common television test in countries that use the NTSC standard video format, one of the most popular. What was the role of these colored bars? They were tasked with calibrating the signage and adjusting the receiver for light and color palette. Interesting fact: the design of this colorful pattern is quite simple and only has vertical lines. In this format there are seven color bars at 75% intensity (gray, yellow, cyan, green, magenta, red, and blue). The rest of the image is made up of calibrations and settings so you can adjust them to the TV.
SMTPE Chart – Source: spm
But, over time, these patterns began to gradually fade from the television landscape. Simply because television technology has come a long way, advancing by leaps and bounds in recent years. Therefore, this type of adjustment is no longer necessary. However, some channels still use them sometimes, just to mark the end of the broadcast.
From now on, the origin of these famous bands of colors that appear on your screens becomes clear to you. Now, we are going to give you some tips to preserve the longevity of your television. Because, like any other device, its useful life is limited, but it depends above all on its maintenance. By adopting good habits, you can enjoy them for a few more years.
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Bet on a suitable location
Choose TV location – Source: spm
Where you place your TV is critical. It is especially important to avoid placing it near the window: if it is exposed to the sun, it can get hot and this could damage some of its components. In the same direction, keep it away from any heat sources where the temperature is high, such as radiators. The ideal is to install it in a cool and ventilated corner. But also avoid damp areas that attract insects. These can lurk and damage your TV’s internal circuitry.
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Unplug the TV when not in use
Leaving the device constantly plugged in is a very common mistake. However, it’s important to completely unplug your TV overnight and even when you leave the house. This will not only allow you to save energy, but also protect it against power surges. Not to mention, standby tends to wear out your smart TV. Therefore, it is preferable to take the reflex of unplugging it as soon as you are no longer in front of it.
Finally, although you rarely think about it, it helps to properly clean your TV on a regular basis. Because, like any electrical device, dust and smudges accumulate on the screen. If you want your TV to stay as efficient as ever and last over time, a little cleaning won’t hurt. However, you must apply the right products: it is better to avoid chemicals such as sprays and disinfectants that can damage your components over time. Opt for white vinegar (diluted with water), a natural detergent proven to effectively dust and clean your device. To do this, we advise you to always use a soft microfiber cloth to avoid scratching the screen.
read also What do the colors on food packaging mean? A little known but very useful function.
