LEDs have different chemical compositions because of th […]
LEDs have different chemical compositions because of their different colors:
Such as red: aluminum-indium-gallium-phosphide
Green and blue: indium-gallium-nitride
White and other colors are mixed in RGB three primary colors in appropriate proportions;
The manufacturing process of LEDs is similar to that of semiconductors, but the processing accuracy is not as good as that of semiconductors, and the cost is still high.
Optical characteristics of LED
1. The light emitted by the LED is neither monochromatic nor broadband, but the balance between the two;
2. The LED light source is like a point source and a point source;
3. The color of the LED emitting light varies with the direction of the space;
4. The junction temperature of the LED under constant current operation strongly affects the forward voltage VF.