Green, Blue, Red LED, son los monitores que utilizan un sistema de retroiluminación en el que el blanco se forma a partir de los tres colores primarios, Verde, Azul, Rojo. De esta manera conseguimos un blanco mas puro y equilibrado que los otros sistemas de LED.
Normalmente el 99% de los monitores retroiluminados por LED lo son por luz blanca o azul, conocido como Blue LED.
Solo disponen del sistema RGB LED los monitores destinados a tareas gráficas criticas.
Para calibrar este tipo de monitores se recomienda el uso de dos calibradores, el idealmente el i1 Display PRO o en el caso de los monitores NEC Spectraview el SpectraSensor PRO específicamente calibrado para los monitores NEC.
En general el propio software del i1 Display PRO seria suficiente para la realización de una calibración precisa. Otra opción a considerar es el uso del software Basiccolor Display que proporciona mas opciones para la calibración. Antes de la adquisición de este software es recomendable probarlo con la demo que se facilita de 14 días.
White light can be formed by mixing differently colored lights; the most common method is to use red, green, and blue (RGB). Hence the method is called multi-color white LEDs (sometimes referred to as RGB LEDs). Because these need electronic circuits to control the blending and diffusion of different colors, and because the individual color LEDs typically have slightly different emission patterns (leading to variation of the color depending on direction) even if they are made as a single unit, these are seldom used to produce white lighting. Nevertheless, this method is particularly interesting in many uses because of the flexibility of mixing different colors, and, in principle, this mechanism also has higher quantum efficiency in producing white light.
There are several types of multi-color white LEDs: di-, tri-, and tetrachromatic white LEDs. Several key factors that play among these different methods, include color stability, color rendering capability, and luminous efficacy. Often, higher efficiency will mean lower color rendering, presenting a trade-off between the luminous efficiency and color rendering. For example, the dichromatic white LEDs have the best luminous efficacy (120 lm/W), but the lowest color rendering capability. However, although tetrachromatic white LEDs have excellent color rendering capability, they often have poor luminous efficiency. Trichromatic white LEDs are in between, having both good luminous efficacy (>70 lm/W) and fair color rendering capability.
One of the challenges is the development of more efficient green LEDs. The theoretical maximum for green LEDs is 683 lumens per watt but as of 2010 few green LEDs exceed even 100 lumens per watt. The blue and red LEDs get closer to their theoretical limits.
Multi-color LEDs offer not merely another means to form white light but a new means to form light of different colors. Most perceivable colors can be formed by mixing different amounts of three primary colors. This allows precise dynamic color control. As more effort is devoted to investigating this method, multi-color LEDs should have profound influence on the fundamental method that we use to produce and control light color. However, before this type of LED can play a role on the market, several technical problems must be solved. These include that this type of LED's emission power decays exponentially with rising temperature, resulting in a substantial change in color stability. Such problems inhibit and may preclude industrial use. Thus, many new package designs aimed at solving this problem have been proposed and their results are now being reproduced by researchers and scientists.
Correlated color temperature (CCT) dimming for LED technology is regarded as a difficult task, since binning, age and temperature drift effects of LEDs change the actual color value output. Feedback loop systems are used for example with color sensors, to actively monitor and control the color output of multiple color mixing LEDs.