Techniques for dynamic headroom control in a light emitting diode (LED) system are disclosed. An output voltage is provided to drive a plurality of LED strings. A feedback controller monitors the tail voltages of the LED strings to identify the minimum tail voltage and adjusts the output voltage based...http://www.google.com/patents/US8115414?utm_source=gb-gplus-sharePatent US8115414 - LED driver with segmented dynamic headroom control
