Patent ID: 11924948
Assignee: LUTRON TECHNOLOGY COMPANY LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A control module for use in a load control system for controlling a cumulative light emitted by a plurality of light-emitting diodes (LEDs), the control module comprising:
a first branch that includes a first controllably conductive device electrically coupled in series with a first LED of the plurality of LEDs;
a second branch that includes a second controllably conductive device configured to be electrically coupled in series with a second LED of the plurality of LEDs, the second branch in coupled in electrical parallel with the first branch;
a third branch that includes a third controllably conductive device electrically coupled in series with an artificial load circuit, the third branch in coupled in electrical parallel with the first branch and the second branch; and
a control circuit configured to, in response to receipt of at least one control instruction via a first communication circuit:
generate a first drive signal for rendering the first controllably conductive device conductive and non-conductive to control a magnitude of a first LED current through the first LED;
generate a second drive signal for rendering the second controllably conductive device conductive and non-conductive to control a magnitude of a second LED current through the second LED;
adjust the magnitude of the first LED current and the magnitude of the second LED current to adjust the cumulative light emitted by the plurality of LEDS in response to the at least one control instruction;
a second communication circuit communicatively coupled to an LED driver via a second communication link;
wherein the control circuitry is configured to control the LED driver via the second communication circuit;
wherein the control instruction includes a requested intensity for the plurality of LEDs;
wherein the control circuit is configured to adjust the magnitude of an output current of the LED driver as a function of the requested intensity in response to receipt of the at least one control instruction;
wherein, when the requested intensity is greater than the low-end intensity of the LED driver, the control circuit is configured to control the duty cycle of the third drive signal to zero, and adjust the respective duty cycles of the first and second drive signals in dependence upon a requested color temperature; and

generate a third drive signal for rendering the third controllably conductive device conductive to divert at least a portion of the first and second LED currents away from the first and second LEDs of the plurality of LEDs.