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How Tri-color and RGB LEDs Work

This article about Tri-Color and RGB LEDs explains about the benefits and uses of Tri-Color and RGB LEDs.
Tri-color and RGB LEDs use three different color lights put together in one design. Instead of producing one solid color light, these LEDs will produce three or more depending on which type of light system you purchase. There are two types of tri-color and RGB LEDs to choose from. Of course, there are many different products that each type is used in.

The tri-color with the red and green color combination is the most popular and the simplest. These are classified as tri-color LEGs because they are designed with three leads and when the red and green lights are both turned on at the same time, it produces a yellow color thus, giving you the third color. The RGB tri-color design is the second type and it allows you to set the controller to display one particular color at a time or it can run through a cycle that changes colors continuously.

These actually contain three different colors which are red, green and blue and this is where the name RGB LEDs came from. The combined colors create many more colors so it appears as if you have more than three. For example, the red and green will make yellow, green and blue will make white and a turquoise color can be produced by a blue and green combination. These are just the basic colors, there are many more.

The number of combinations that can be created will depend on the type of controller you have. Some of them are very simple and will cycle through the colors automatically without a controller. Others have sophisticated designs with controllers that can create numerous color schemes depending on the setting.

A white light can be created by mixing certain colors together and the red, green and blue combination is the simplest way to create white light. This type of LEDs offer the user more flexibility when it comes to color but there are a few key factors needed to create a good quality tri-color LED.

To start with they need to have good color rendering capabilities. In other words, they need to be able to reproduce the colors realistically in the same way they would be seen naturally. They need to have stability, which simply means they need to have the ability to reproduce these colors repeatedly without failure. The luminous efficacy is also important, which is the quantity of light sources used to create the colors.

Most all of these designs have three leads running from each color to the ground connection. However, some designs have four leads that will include the three for each color and one for the ground connection that is attached to all three colors. The amount of current that reaches each LED is what determines the amount of light it puts out. Therefore, you can create a variety of different colors by controlling the amount of current running to each LED.

Tri-color and RGB LEDs have many different uses but some of the most noticeable are commercial marketing applications. These include bill-boards and other types of signs that display messages to consumers. It can be anything from the flashing lottery sign telling you what this week’s jack-pot is to signs advertising specific products.