System and method of operating a constant current light-emitting diode pulsing drive circuit

One or more computer-readable media having computer-executable instructions thereon that, when executed by one or more processors, cause the one or more processors to perform a method of periodically tuning a voltage supplied to a constant current LED pulsing drive circuit having one or more LEDs in series, wherein each of the one or more LEDs has a variable forward voltage that is less than a maximum forward voltage rating, and wherein each of the pulsed currents supplied to the constant current LED pulsing drive circuit lasts less than 300 microseconds, the method comprising:

• sending a first indication to set a bias voltage applied to the one or more LEDs to a test value, the test value being at least equal to a sum of a secondary drive voltage necessary to drive other components of the constant current LED pulsing drive circuit and the maximum forward voltage rating of each of the one or more LEDs;
• from a node positioned between the one or more LEDs and the other components, receiving a voltage measurement from the node to ground;
• determining if the voltage measurement is greater than the secondary drive voltage;
• and
• upon determining that the voltage measurement is greater than the secondary drive voltage, sending a second indication to reduce the bias voltage supplied to the constant current LED pulsing drive circuit to reduce the voltage from the node to ground to the secondary drive voltage.

A constant current LED pulsing drive circuit comprising:

• a voltage supply configured to supply a bias voltage;
• one or more LEDs in series with the voltage supply, each of the one or more LEDs having a first drive voltage requirement necessary for lighting each of said one or more LEDs, the first drive voltage requirement being within a range of forward voltages between a minimum forward voltage and a maximum forward voltage;
• one or more other components in series with the one or more LEDs, the one or more other components having a second drive voltage requirement;
• a controller configured to control pulses of current passing through the one or more LEDs, wherein each of the pulses lasts less than 300 microseconds;
• and
• a sensor configured to determine an intermediate voltage of the constant current LED pulsing drive circuit at a node between the one or more LEDs and the one or more other components and, based upon the intermediate voltage, cause a signal to be sent to adjust the bias voltage.