LED lighting apparatus with colour mixing

摘要

In comparison with thermal light sources, LED lighting has the advantage that it is very small and at the same time commercially available in different colors, so that colored lighting can be produced inexpensively and at the same time in a manner that saves installation space. It is an object of the present invention to equip an LED lighting apparatus with a color mixing functionality that is distinguished by high efficiency and at the same time a small number of components.

主权项

1. An LED lighting apparatus comprising:
a colour mixing unit, wherein the colour mixing unit comprises at least a first colour group of LEDs and a second colour group of LEDs, wherein the LEDs in the colour groups differ by virtue of the light colour; a power supply for supplying a supply voltage to the colour mixing unit, wherein the supply voltage is in the form of a rectified AC voltage, wherein a repetition rate of half cycles of the supply voltage defines a voltage frequency; and a control device for selectively activating and deactivating the colour groups, wherein the colour mixing unit produces a mixed colour by means of the selectively activated and deactivated colour groups, wherein a repetition rate of a colour time window defines a colour mixing frequency, wherein the control device is configured to actuate the colour groups, such that the colour groups are activated within the colour time window in succession to produce the mixed colour during the colour time window.