Devices for colour control (DT-8)
Manual DALI gateway S64 KNX/S128 KNX
12
Figure 1: Colour space chromaticity diagram according to CIE 1931 (Source: Wikipedia)
In devices that support the XY coordinates method, the colour is set via two values between 0.0
and 1.0. However, because of the physical properties of an LED, even in an RGB LED module not
every colour is practically possible. In practice, it is common to set the value which is closest.
Please pay attention to the instructions of the ECG or light manufacturer. Usually the XY
values, which are supported by the lamp, are specified here. Values outside of the
specified range can generate non-reproducible colours.
4.3
Colour dislay via colour temperature
A subset of all possible colours in the colour space are the different white tones. The white
tones are found on one line across the whole colour space.
Figure 2: White tone on Black-Bodyline (Source: Wikipedia)