LIGHTING CONTROL SYSTEM HAVING A TRIM CIRCUIT
First Claim
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1. A lighting control system for a lighting device, the system comprising:
- a primary controller;
a plurality of drive controllers electrically connected with the primary controller;
a plurality of drive outputs electrically connected with a drive controller, each drive controller controlling at least one drive output;
a plurality of LED modules, each LED module electrically connected with a drive output and having a plurality of series-connected LEDs, wherein at least one of said plurality of LED modules include;
a trim circuit to compensate for forward voltage variations among said LEDs of the LED module, said trim circuit balancing voltage drop differences across the series-connected LEDs thereby providing substantially uniform lighting for said plurality of LED modules.
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Abstract
A lighting control system suitable for a surgical lighting device. The lighting control system includes circuitry that compensates for the effects of temperature changes in a lighting device, and that compensates for forward voltage variations among LED lighting modules to provide substantially uniform light output.
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Citations
8 Claims
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1. A lighting control system for a lighting device, the system comprising:
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a primary controller; a plurality of drive controllers electrically connected with the primary controller; a plurality of drive outputs electrically connected with a drive controller, each drive controller controlling at least one drive output; a plurality of LED modules, each LED module electrically connected with a drive output and having a plurality of series-connected LEDs, wherein at least one of said plurality of LED modules include; a trim circuit to compensate for forward voltage variations among said LEDs of the LED module, said trim circuit balancing voltage drop differences across the series-connected LEDs thereby providing substantially uniform lighting for said plurality of LED modules. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification