Methods and devices for an electrically efficient green laser diode drive system with boost servo

An imaging engine utilizing a laser diode, the imaging engine comprising:

• an imaging assembly;
• an image processing assembly for decoding indicia;
• and
• an aiming pattern assembly that includes a laser drive subassembly comprising:
• a laser diode configured to output light within a wavelength range of 495 nanometers (nm) to 570 nm,
• a boost regulator configured to output a maximum boost voltage to drive the laser diode, and
• a boost servo, configured to be electrically coupled with the laser diode and the boost regulator, wherein the boost servo is further configured to:
• measure a laser voltage of the laser diode,
• calculate a voltage difference between the laser voltage and the maximum boost voltage,
• compare the voltage difference to a drive voltage corresponding to a laser drive circuit to determine whether or not the voltage difference exceeds the drive voltage,
• responsive to determining that the voltage difference exceeds the drive voltage by an excess voltage, cause the boost regulator to output an optimum voltage based on the excess voltage,
• calculate a low voltage configured to drive at least one additional component that is electrically coupled to the boost regulator when the laser diode is inactive, and
• responsive to the laser diode being inactive, cause the boost regulator to output the low voltage to power the at least one additional component.

A tangible machine-readable medium comprising instructions that, when executed, cause a machine to at least:

• measure a laser voltage of a laser diode, wherein the laser diode is configured to output light within a wavelength range of 495 nanometers (nm) to 570 nm;
• calculate a voltage difference between the laser voltage and a maximum boost voltage supplied to drive the laser diode;
• compare the voltage difference to a drive voltage corresponding to a laser drive circuit to determine whether or not the voltage difference exceeds the drive voltage;
• responsive to determining that the voltage difference exceeds the drive voltage by an excess voltage, cause a boost regulator to output an optimum voltage based on the excess voltage;
• calculate a low voltage configured to drive at least one additional component that is electrically coupled to the boost regulator when the laser diode is inactive;
• and
• responsive to the laser diode being inactive, cause the boost regulator to output the low voltage to power the at least one additional component.