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Neon sign. The neon sign is an evolution of the earlier Geissler tube, [11] which is a sealed glass tube containing a "rarefied" gas (the gas pressure in the tube is well below atmospheric pressure). When a voltage is applied to electrodes inserted through the glass, an electrical glow discharge results.
The sign was composed of nine repetitions of the familiar 'circle w' logo, each of which was 17.5 feet (5.3 m) in diameter and initially divided into nine sections—the enclosing circle, the four diagonal strokes of the W, the three dots above the W, and the bar below—meaning that the entire sign comprised eighty-one individual elements. [9]
The 2011 UEFA Champions League Final match between Manchester United and Barcelona was broadcast live in 3D format in Gothenburg (Sweden), on an EKTA screen. It had a refresh rate of 100 Hz, a diagonal of 7.11 m (23 ft 3.92 in) and a display area of 6.192×3.483 m, and was listed in the Guinness Book of Records as the largest LED 3D TV.
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