Patent ID: 8111272
Filing Date: 2012-02-07
Classification: G03G,H04N

Abstract:
1. A method for compensating misalignment errors associated with a laser beam in an electrophotographic (EP) device, the method comprising: determining a first value of a time-of-flight of the laser beam, the first value of the time-of-flight being associated between a first value of a start-of-scan (SOS) time and a first value of an end-of-scan (EOS) time of the laser beam; determining a second value of the time-of-flight of the laser beam, the second value of the time-of-flight being associated with a current value of the SOS time and a current value of the EOS time of the laser beam; comparing the second value of the time-of-flight of the laser beam with the first value of the time-of-flight of the laser beam; monitoring a duty cycle of a fuser of the EP device, the duty cycle associated with an ‘on-time’ of the fuser over a first predetermined time interval; determining an average value of the duty cycle of the fuser for a second predetermined time period; and adjusting one or more alignment conditions of the laser beam based on at least one of the comparison of the second value of the time-of-flight and the first value of the time-of-flight of the laser beam, and the determined average value of the duty cycle of the fuser, wherein the adjusting of the one or more alignment conditions of the laser beam compensates for the misalignment errors of the laser beam in the EP device.