Patent ID: 7101015
Filing Date: 2006-09-05
Classification: B41J

Abstract:
1. A print control apparatus for inkjet printers, comprising: an encoder sensor for outputting a first and a second signal every time a slit is detected; a direction decision unit for determining a travel direction of a carriage having a printer head therein based on the first and the second signal output from the encoder sensor; an edge detection unit for detecting rising and falling edges of the first and second signals; a position counter for increasing and decreasing a counting value in relation to a direction determination signal from the direction decision unit and an edge detection signal from the edge detection unit; and a control unit for moving the carriage to a predetermined reference position if the value counted by the position counter is equal to a predetermined reference position value, and outputting a print reference signal to the printer head, wherein the control unit outputs the print reference signal based on the same edge detected by the edge detection unit regardless of the travel direction of the carriage.