Circuit configuration for operating LEDs for a micromirror arrangement

摘要

A circuit configuration for operating at least one LED, comprising: an input with a first input terminal (E1) and a second input terminal (E2) for coupling to a DC voltage supply (UG); an output having a first output terminal (A1) and a second output terminal (A2) for providing an output current (IA) to the at least one LED; a micromirror arrangement (12) comprising a plurality of micromirrors; a first control device (16) configured for providing, at the output thereof, a first control signal (Sa) for the micromirror arrangement (12), the first control signal (Sa) being synchronized to a first clock frequency (fc11); a switching regulator (10), the input thereof being coupled to the first input terminal (E1) and the second input terminal (E2), and the output thereof being coupled to the first output terminal (A1) and the second output terminal (A2), the switching regulator (10) comprising a switch (S1); and a second control device (18) configured for providing, at the output thereof, a second control signal (Sb) for the switch (S1) of the switching regulator (10); wherein the second control signal (Sb) is synchronized to a second clock frequency (fc12), wherein the equation fc12=n*fc11 applies, where nε.

主权项

1. A circuit configuration for operating at least one LED, comprising:
an input with a first input terminal and a second input terminal for coupling to a DC voltage supply; an output having a first output terminal and a second output terminal for providing an output current to the at least one LED; a micromirror arrangement comprising a plurality of micromirrors; a first control device configured for providing, at an output thereof, a first control signal for the micromirror arrangement, the first control signal being synchronized to a first clock frequency (fc11); a switching regulator, an input thereof being coupled to the first input terminal and the second input terminal, and an output thereof being coupled to the first output terminal and the second output terminal, the switching regulator comprising a switch; and a second control device configured for providing, at an output thereof, a second control signal for the switch of the switching regulator; wherein the second control signal is synchronized to a second clock frequency (fc12), wherein the equation
fc12=n*fc11 applies, where nε.