Patent ID: 6565180
Filing Date: 2003-05-20
Classification: B41J

Abstract:
An ink jet printer for printing a document, the ink jet printer comprising:an ink jet printing head comprising a plurality of nozzles; an ink jet compensation controlling device for driving the ink jet printing head so that the nozzles are capable of forming a plurality of linear printing strips on the document, each printing strip comprising a plurality of ink jet points; and a detecting device for detecting a working status of the nozzles; wherein when the nozzles work normally, the ink jet compensation controlling device uses the nozzles to form the printing strips, and when the detecting device detects at least a malfunctioning nozzle in the nozzles, the ink jet compensation controlling device selects a group of normal nozzles according to the position of the malfunctioning nozzle, the group of normal nozzles comprising a plurality of normal nozzles that excludes the malfunctioning nozzle, and the ink jet compensation controlling device controls the group of normal nozzles to form corresponding printing strips on the document, the printing strips formed by the group of normal nozzles covering an area of the printing strips that is formed by the malfunctioning nozzle if the malfunctioning nozzle is working.