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An LED display (in other words, “light-emitting diode display”) is a visual display device based on light-emitting diodes.
History and overview
The first commercially used LED displays of the types 1 and 2 defined above were made from monolithic gallium arsenide single crystal wafers by sawing and contacting.[1] These were used, among other things, to realize digit displays consisting of seven LED segments each (seven-segment displays, type 2), which were used as red luminous displays in products such as the first digital watches or pocket calculators in the early 1970s. These were replaced around the beginning of the 1980s by LCD displays, which had much lower power consumption.
This was later followed by red-colored alphanumeric small displays consisting of discrete, dot-shaped LEDs of type 1 arranged in a matrix. One application example is ticker displays (dynamic type displays), which are still used today, for example, by retailers or small service providers in shop windows, but also at train stations.
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The JumboTron, sometimes called the jumbo vision, is a large video monitor using video wall technology. The original model was developed in the early 1980s by Mitsubishi Electric and Sony, which used JumboTron as a trademark in 1985. Mitsubishi Electric has introduced its own version of this technology called Diamond Vision. It was commonly used in sports stadiums and concert venues to show close-ups of events or even other sporting events taking place at the same time, as well as in outdoor public places (such as Times Square).
How big is the Times Square Jumbotron?
Eidlitz, located at 42nd Street and Broadway in New York City. Due to the large amount of revenue generated by its signage, One Times Square is considered one of the most valuable advertising locations in the world.
Panasonic had an Astro Vision based on fluorescent discharge tubes. These were just three players in the big screen industry.
Ironically, it was Sony that introduced Daktronics into the world of professional and college sports, since Sony sold Daktronics scoreboards and controllers exclusively with its video cards. Eventually, Daktronics completely replaced Sony in this area.
In 1985 Sony introduced the term “JumboTron” to refer to its large-scale video cards. JumboTron was the trademark for the large-scale video boards originally produced by Sony, and is recognized as one of the largest non-projectable video displays ever produced. Sony Creative Director Yasuo Kuroki, who was previously involved in the development of the Walkman, is the author of the JumboTron. It was introduced at Expo ’85, held in Tsukuba, Ibaraki, in May 1985. It had a screen resolution of 450,000 pixels and used a new proprietary Sony technology called Trini-lite. This was a microprocessor lamp developed by one of Kuroki’s colleagues, Betamax chief engineer Yuji Watanabe. Trini-lite technology provided screen clarity and computer control, laying the groundwork for Sony’s first JumboTron.
Although the JumboTron and similar large screens were physically large, their resolution ranged from low to medium. Although the resolution of Sony’s original JumboTron in 1985 was 450,000 pixels, which was comparable to standard definition TVs of the era,[3] some later models had lower resolution. The JumboTron at the now demolished Tampa Stadium in Tampa, Florida, was 30 feet (9 m) diagonal and had a resolution of only 240×192 pixels, lower than VHS resolution. Since then, the screen size has varied depending on the venue. The screen introduced in 1985 was 40 meters wide and 25 meters high. Newer and larger LED-based screens have an order of magnitude higher resolution than the original JumboTron, at a lower cost. For example, the much-publicized center video board at AT&T Stadium in Dallas, where the Cowboys play, is 72 feet tall and 160 feet wide (22 m x 49 m) and displays HDTV at 1920 x 1080 resolution, which is 45 times more pixels.
The largest JumboTron was used at the SkyDome (now Rogers Centre) in Toronto, Ontario, it was 10 m high, 33.5 m wide (33 ft × 110 ft) and cost $17 million. By comparison, an LED system of similar size sold today would cost about $3 million. In 2005, the JumboTron at Rogers Centre was replaced by a Daktronics ProStar as part of the stadium renovation project.
The Sony JumboTron was the first video board in Times Square. It went on like that for almost ten years.
