We have always noticed an intriguing fact on our televisions: with each bug in the signal or possible failure, colored bars immediately appear on the screen. This still happens sometimes at the end of a transmission. This frozen image (pattern) is now anchored in our minds. But do you know its origin? Many people do not know why these colored stripes suddenly appear on the screen. If you are one of them, we are going to unravel this mystery for you.
Mire: Where do these colored bars on the TV screen come from?
No signal on television – Source: spm
Since the advent of televisions, test charts have always existed. For those who do not know, this type of colored image was used to adjust the display of the television which then had an antenna at that time. The most famous of these images was the one created in 1938 by the RCA (a company that marketed electronic products): it was easily recognizable since it displayed a small image of an American Indian.
La mire RCA – Source : spm
Later, the appearance of TV color will cause the design of these models to change. SMPTE color bars, the invention of Norbert Larky and David Holmes, will then be adopted. This is a very common television test in countries that use the standard NTSC video format, one of the most popular. What was the role of these colored bars? They had the task of calibrating the signaling and adjusting the receiver in terms of light and color palette. Interesting fact: the design of this colorful pattern is rather 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 picture is made up of calibrations and setups so you can adjust them to the TV.
Mire SMTPE – Source : spm
But, over time, these patterns began to gradually disappear from the television landscape. Simply because television technology has evolved a lot, progressing by leaps and bounds in recent years. Therefore, this type of adjustment is no longer necessary. However, some channels still use them sometimes, only to mark an end of transmission.
From now on, you are enlightened on the origin of these famous colored bands which appear on your screens. Now, we are going to provide you with some tips to preserve the longevity of your television. Because, like any other device, its lifespan is limited, but it depends above all on its maintenance. By adopting good habits, you will be able to 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 may heat up and this might damage some of its components. In the same direction, keep it away from any heat source where the temperature is high, such as radiators. Ideally, it should be installed in a cool and ventilated corner. But, also avoid wet areas that attract insects. These can lurk around and damage the internal circuitry of your television.
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Disconnect the TV when not in use
Leaving the device constantly plugged in is an often very common mistake. However, it is important to completely unplug the television during the night and even when you leave the house. This will not only allow you to save energy, but you will also protect it once morest power surges. Not to mention that the standby mode tends to wear down your smart TV. It is therefore preferable to take the reflex to unplug it as soon as you are no longer in front of it.
Finally, even if you hardly ever think regarding it, it is useful clean the television properly regularly. Because, like any electrical device, dust and smudges accumulate on the screen. If you want your television to remain as efficient as ever and to last over time, a little wipe down will do you no harm. However, you must apply the right products: it is better to avoid chemicals such as sprays and disinfectants which may damage its components over time. Opt for white vinegar (diluted in water), a natural and proven detergent to dust and clean your device effectively. To do this, we advise you to always use a soft, microfiber cloth so as not to scratch the screen.
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