Vertical alignment correction apparatus and method

摘要

A vertical alignment correction apparatus and method includes a central processing unit for reading a vertical alignment correction program, detecting scanning distances during bidirectional scanning using a vertical reference line, and outputting a control signal for correcting a scanning distance difference; a print driver for receiving the correction control signal and for outputting a control signal for controlling the scanning distances; and a carriage return motor whose rotation number is controlled according to the control signal output from the print driver.