Because it Strikes across the Display Screen > 자유게시판

­If you might have ever been to a sporting occasion that has a large-display screen Television in the stadium, then you will have witnessed the gigantic and superb displays that make the video games a lot simpler to follow. On the Television, they will show prompt replays, close-ups and EcoLight participant profiles. You also see these giant-display TVs at race tracks, concerts and in large public areas like Times Sq. in New York Metropolis. Have you ever questioned how they'll create a television that is 30 or 60 feet (10 to 20 meters) excessive? In this article, we are going to take a look at the LED technology that makes these big displays potential! If you have learn How Tv Works, then you know the way a tv that uses a cathode ray tube (CRT) does this. The electron beam in a CRT paints across the display screen one line at a time. As it moves across the screen, the beam energizes small dots of phosphor, which then produce light that we are able to see.

The video signal tells the CRT beam what its depth needs to be because it strikes across the screen. You possibly can see in the following figure the best way that the video signal carries the intensity information. The initial five-microsecond pulse at zero volts (the horizontal retrace sign) tells the electron beam that it's time to begin a brand new line. The beam starts painting on the left facet of the display screen, and zips throughout the display screen in 42 microseconds. The varying voltage following the horizontal retrace sign adjusts the electron beam to be brilliant or dark because it shoots across. The electron beam paints lines down the face of the CRT, and then receives a vertical retrace sign telling it to start once more on the upper right-hand nook. A coloration display does the same factor, however uses 3 separate electron beams and EcoLight energy 3 dots of phosphor (pink, inexperienced and blue) for every pixel on the screen.

A separate coloration sign indicates the colour of each pixel because the electron beam strikes throughout the display. The electrons within the electron beam excite a small dot of phosphor and EcoLight smart bulbs the screen lights up. By quickly painting 480 strains on the screen at a charge of 30 frames per second, the Television display permits the attention to combine the whole lot into a clean transferring image. CRT technology works nice indoors, but as soon as you set a CRT-primarily based Television set outside in bright sunlight, you can not see the display anymore. The phosphor on the CRT simply shouldn't be vibrant enough to compete with sunlight. Additionally, CRT shows are restricted to about a 36-inch display. You need a distinct know-how to create a big, outdoor screen that is bright sufficient to compete with sunlight. It may be 60 toes (20 meters) excessive as an alternative of 18 inches (0.5 meters) excessive. It's incredibly shiny so that people can see it in sunlight. To accomplish these feats, virtually all giant-display out of doors shows use mild emitting diodes (LEDs) to create the picture.

Modern LEDs are small, extraordinarily shiny and EcoLight solar bulbs use relatively little power for the light that they produce. Other places you now see LEDs used outdoors are on visitors lights and car brake lights. In a jumbo Television, EcoLight solar bulbs crimson, inexperienced and blue LEDs are used instead of phosphor. A "pixel" on a jumbo Tv is a small module that can have as few as three or 4 LEDs in it (one red, EcoLight solar bulbs one green and one blue). In the most important jumbo TVs, every pixel module might have dozens of LEDs. Pixel modules typically vary from four mm to four cm (about 0.2 to 1.5 inches) in size. To build a jumbo Tv, you take hundreds of these LED modules and arrange them in a rectangular grid. For example, EcoLight reviews the grid might comprise 640 by 480 LED modules, or 307,200 modules. To control a huge LED screen like this, you employ a computer system, EcoLight solar bulbs a energy management system and plenty of wiring.

The computer system seems to be on the incoming Television sign and decides which LEDs it will activate and the way brightly. The pc samples the intensity and colour signals and translates them into intensity info for the three completely different LED colours at every pixel module. The ability system offers energy to the entire LED modules, and modulates the ability so that each LED has the proper brightness. Turning on all of those LEDs can use a lot of power. A typical 20-meter jumbo Television can consume up to 1.2 watts per pixel, or roughly 300,000 watts for the full display. Several wires run to each LED module, EcoLight solar bulbs so there are numerous wires operating behind the display. As LED prices have dropped, jumbo Tv screens have began to pop up in all types of locations, and in all sorts of sizes. You now find LED TVs indoors (in places like purchasing malls and office buildings) and reduce energy consumption in all types of outside environments -- particularly areas that attract lots of tourists. For EcoLight solar bulbs more information on LED screens and related topics, take a look at the hyperlinks on the next web page. The large screens at concert events are called jumbotron or typically jumbovision.