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Electronic signs may be used indoors or outdoors. The display technologies are varied and changing quickly. Because of new display technologies, electronic signs are able to present more clear, colorful, and vivid images. Animated electronic signs gradually replace traditional static signs and increasingly take signage market share.
The next major technological innovation in neon lighting and signs was the development of fluorescent tube coatings. [22] Jacques Risler received a French patent in 1926 for these. [5] Neon signs that use an argon/mercury gas mixture emit a good deal of ultraviolet light. When this light is absorbed by a fluorescent coating, preferably inside ...
Built-up letters made from rocks and concrete are the most common. Other materials such as wood, old car tires, metal, and vinyl have also been used. The M in Missoula, Montana, for the University of Montana, is an example of a built-up letter. Painted letters are typically found on bare rock faces and cliffs, as is the G in The Gap, Arizona.
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