RGB vs. RRGB LEDwalls

Last week we received a question from a visitor of the Euro Display website, concerning a particular feature of the LEDwall: "Some LED manufacturers speak about using 1R, 1G and 1B LED in their displays whereas others talk about 2R, 1G and 1B. What is the difference between these?"

Let's start by clarifying what 1R, 1G and 1B means: it is the description of the number and color of the LEDs in each single pixel. Therefore it should be read "1 Red + 1 Green + 1 Blue LED For Each Pixel".

Red Green and Blue are the three basic colors used on LEDwalls to enable the Additive Color Synthesis. The Additive Color Synthesis is the method of creating color by mixing various proportions of two or three distinct stimulus colors of light. These primary colors are commonly red, green, and blue, however they may be any wavelengths to stimulate distinct receptors on the retina of the eye.

The distinguishing features of additive color synthesis are that it deals with the color effects of light rather than with pigments, used in the digital printing. The most common example of additive color synthesis is the color television screen, (or RGB monitor), which is a mosaic of red, green, and blue phosphor dots.

And exactly the same principle is applied to LEDwalls; at normal viewing distances the eye does not distinguish the single LEDs, but blends or adds their stimulus effects to obtain a composite color effect.

As our visitor pointed out, some LEDwalls manufacturers prefer to use a RRGB combination with (2 Red lights per pixel) rather then the most common RGB. So what is the difference? Mainly it is a difference of technical approach but basically there are no or little differences in terms of performances.

Just to be clear: I am not saying that there are no differences in performances between the manufactures, I am just saying that these differences between LEDwalls are not due to the number/color combination of LEDs per pixel!