Illumination device with light emitting diodes (LED) and an LED support
element on which a number of light pixels are arranged which emit light are disclosed.
The light pixels each comprise a number of LEDs with emission wavelengths suitable
for additive color mixing of the light from the light pixels. A controller is provided
on the LED support element, for setting a color temperature and intensity parameter
of the additively color mixed light of each individual light pixel. The controller
assigns electrical LED currents to the color temperature and intensity parameters
and controls the LEDs in the light pixels using the assigned LED currents. Control
devices measure the color temperature and intensity of the emitted light of at
least one light pixel, compare the measured and the pre-set color temperature and
intensity parameters of the light pixel and in the case of a difference in the
measured and pre-set color temperature and intensity parameters regulates the controller
such that the emitted light from the light pixel has the pre-set color temperature
and intensity parameters.
