Method of driving print head in ink jet printer and ink jet printer

An ink jet printer for ejecting and dropping ink drops from a plurality of nozzles onto a recording medium and recording information including a character and/or an image in the form of dots based on the ink drops,

• the ink jet printer comprising a print head having a driving element for ejecting ink drops from the nozzles,
• wherein the print head is controlled by pulse number modulation and driven by time-divisional driving, the print head is caused to scan a same portion on the recording medium only once in one print is driven to modulate a diameter of the dot by the number of ink drops, using one or a plurality of ink drops for forming one dot and is a line head immovably fixed on the ink jet printer and extending in a page-width direction thereacross, the plurality of nozzles arranged in blocks alternating in a zigzag manner across the entire print head in the page-width direction.

A method for driving a print head in an ink jet printer in which ink drops are ejected from a plurality of nozzles and dropped on a recording medium so that information including a character and/or an image is recorded in the form of dots based on the ink drops, the method comprises the steps of

• causing the print head controlled by pulse number modulation and having a plurality of driving elements for ejecting the ink drops from the plurality of nozzles and driving the driving elements in a time-divisional manner, to scan a same portion on the recording medium only once in one print and driving the print head to modulate a diameter of the dot by the number of ink drops, using one or a plurality of ink drops for forming one dot, wherein the print head is a line head immovably fixed on the ink jet printer and extending a page-width direction thereacross, the plurality of nozzles arranged in blocks alternating in a zigzag manner across the entire print head in the page-width direction.

An ink jet printer for ejecting and dropping ink drops from a plurality of nozzles onto a recording medium and recording information including a character and/or an image in the form of dots based on the ink drops,

• the ink jet printer comprising a print head having driving elements for ejecting ink drops from the plurality of nozzles and driving the driving elements in a time-divisional manner,
• wherein the print head is controlled by pulse number modulation and driven by time-divisional driving and is caused to scan a same portion on the recording medium only once in one print, is driven to modulate a diameter of the dot by the number of ink drops, using one or a plurality of ink drops for forming one dot and is a line head immovably fixed on the ink jet printer and extending in a page-width direction thereacross, the plurality of nozzles arranged in blocks alternating in a zigzag manner across the entire print head in the page-width direction.