Abstract: A method of calibrating inkjet print head is disclosed to print a specially designed test pattern, including a plurality of first stripe patterns and several second patterns continuously printed and overlapped with each other. The overlapping between the first stripe patterns and the second patterns is checked. One overlapping state is extracted to find an optimal alignment condition, thereby calibrating the inkjet print head and enhancing the printing quality.

Abstract: A method and apparatus for detecting faulty nozzles is applied to a multi-function peripheral (MFP). The method is to print a predefined test pattern by an inkjet component of a printing unit. A scanning unit connecting with the printing unit scans the predefined test pattern to generate an image data of the predefined test pattern. Afterwards, an analyzing unit analyzes the image data of the predefined test pattern to see if any one of the nozzles is clogged. Finally, the analyzing unit reports the result to the printing unit. The printing unit will avoid using the clogged nozzles during the printing process to improve the quality of printing.