White LED lights

LEDs are not officially white by nature but we see many different colors of LEDs in our daily life. Every color of these lights are created by some variations in the red, green or blue LEDs. White LED light is also depend upon the RGB system. Read below to find out more.

Methods to manufacture white light

White light in LEDs is produced in two different ways. The first way is to convert the blue light into white light by applying a coat of phosphor on to the LED. The second way is to mix and combine the RGB spectrum to produce the white light. But from the second way, we can not only produce white light but any light color by changing the intensity of red, green, and blue lights.

Further Explanation

Basics

Now let’s talk about some relevant but probably irrelevant stuff. LEDs are the most efficient source of lights. We use these lights for almost every use case. This is a common electric device that we see all day everywhere such as street lights. The most common examples for applications of LEDs are LED TVs, smart phone screens, remote controls and other electronic devices.

But for most cases, we need white light to see objects. If we talk about science, we see objects when white light falls on any object. The object then absorbs all the light except the light of its own color. The color which matches its color is reflected back to our eye and then finally we can see that object.

History & Deep Knowledge

LEDs are of multiple colors. In the beginning, LEDs were non-efficient and were of single color only. The very first LED was of red color. Then scientists experimented with this technology further, they developed green LEDs by mixing different impurities. But the most important point we are discussing here is the production of white light. White light is not an ordinary light. You can say that white is the mother of all lights. We can produce any color with a proper combination of three major colors which are RGB i.e. red, green, and blue. RGB makes a spectrum when combined together and this results in a white light. In simple words, when we split white light, it distributes in a rainbow, specifically the RGB spectrum.

The point of telling all this story is to explain to you that white is not a color itself. It is basically the combination of RGB spectrum. So in order to produce white LED light, we need RGBs. as we discussed that red and green lights were invented by scientists but the remaining part was blue light. Blue light was then invented by a Japanese scientist named Shuji Nakamura. After the invention of all three lights it is now possible to produce white light.

The point of telling all this story is to explain to you that LED is not white itself. It is basically the combination of RGB spectrum.