Elitneon

This led to British and American experiments in the 1950s that used Gallium Arsenide (GaAs) as a substitute for Zinc Sulphide (ZnS) and the creation of an LED that produced invisible, infrared light at room temperature. These LEDs butik skyltar immediately found use in photoelectric, sensing applications. The first “visible spectrum” LED butik skyltar , producing “red” light was created in 1962 by Nick Holonyak, Jr. (b. 1928) of the General Electric Company who used Gallium Arsenide Phosphide (GaAsP) in place of Gallium Arsenide (GaAs). Once in existence, they were quickly adopted for use as indicator lights.

Before long these red LEDs butik skyltar were producing brighter light and even orange-colored electroluminescence when Gallium Phosphide (GaP) substrates were used. By the mid 1970s, Gallium Phoshide (GaP) itself along with dual Gallium Phosphide (GaP) substrates were being used to produce red, green, and yellow light. This ushered in the trend “towards [LED butik skyltar use in] more practical applications” such as calculators, digital watches and test equipment, since these expanded colors addressed the fact that “the human eye is most responsive to yellow-green light.