GCM 754 Lecture Notes - Lecture 9: Light-Emitting Diode, Gallium Nitride, Semiconductor Device
9 Aug 2017
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Accessible from front with a key and also back (latching system) Light emitting diode (led) is a semiconductor device that emits light when an electric current is passed through it. Until the mid 90"s leds had a limited range of colours, and in particular commercial blue and white leds did not exist. Able to use white leds and blue leds. Led technology has revolutionized the sign industry because of its. Less weight long life and low maintenance. Outdoor led display advertising vs other media advertising. Businesses have found that with television, the capture rate of outdoor advertising is much longer span than any of the other types of advertising. If you see an ad on tv, you switch. When you are on the highway and caught in traffic, you can"t avoid advertisement. This is why outdoor advertising gets more hits. More money in budgets in outdoor advertising. Combinations of concave, convex, and sculpted sections.
