oled (organic light emitting diode) is a variation of the standard led. whilst leds are made up of inorganic material, oled uses organic macromolecules (hydrocarbon compounds) to produce light. unlike leds (light point source), oleds are able to spread light over a specifi c surface. in terms of applications in the lighting world, oled technology is still in its infancy. yet it is obvious that it involves a particularly promising technology. thanks to their perfectly even lighting, oleds are highly suitable for applications such as emergency lighting. the k4 series with oleds is therefore a unique combination of perfectly illuminated signage and ultra slim design.