SELF-ADJUSTING LIGHTING DRIVER FOR DRIVING LIGHTING SOURCES AND LIGHTING UNIT INCLUDING SELF-ADJUSTING LIGHTING DRIVER

摘要

A lighting unit (100) includes light emitting diode (LED) modules (120, 300) and a lighting driver (110, 200) connected to the LED modules. Each LED module includes LEDs (323) and an identification current source (324) supplying an identification current to an identification current output node(180, 380). All of the identification current output nodes are connected together to supply a total identification current having a magnitude which changes in response to the number of LED modules that are connected to the lighting driver. The lighting driver includes: a controllable current source (220 & 250) to supply an LED driving current to the LEDs of the LED modules, and a controller (230) that responds to the total identification current to control the controllable current source to supply the LED driving current at a magnitude which changes in response to the number of LED modules that are connected to the lighting driver.

主权项

1. A system comprising:
a plurality of light emitting diode (LED) modules; and a lighting driver operatively connected to each of the plurality of LED modules, wherein each LED module includes: a corresponding plurality of LEDs, a driving current input node configured to receive a driving current and to supply the driving current to the plurality of LEDs, an LED module identification current output node, and a corresponding identification current source connected between the driving current input node and the LED module identification current output node and supplying an LED module identification current to the corresponding LED module identification current output node wherein all of the LED module identification current output nodes of the plurality of LED modules are connected together to supply a total LED module identification current having a total LED module identification current magnitude which changes in response to a number of the plurality of LED modules that are operatively connected to the lighting driver, and wherein the lighting driver includes: a controllable current source connected to supply an LED driving current to the LEDs of the LED modules, and a controller configured to respond to the total LED module identification current to control the controllable current source to supply the LED driving current at an LED driving current magnitude which changes in response to the number of the plurality of LED modules that are operatively connected to the lighting driver.