Patent ID: 7581799

Claim:
A printing method according to a type of print media using an inkjet printer, which includes a wide printhead having a width longer than a width of the print media and disposed perpendicularly to a media conveying direction, the method comprising the steps of: picking up the print medium and feeding the medium toward under the wide printhead; determining a type of the fed medium; and printing on the medium in a predetermined resolution and in a predetermined ink dropping speed according to the determined type of the medium, wherein the determining of the type of the medium comprises: detecting a characteristic value of the fed medium; and determining the type of the medium by comparing a characteristic value of the medium to values stored in a look-up table; and extracting the predetermined resolution and the predetermined ink dropping speed from the look-up table according to the type of medium; wherein the characteristic value is an optical output value that is measured by an optical sensor by irradiating light onto the fed medium and receiving the light reflected from the medium; and wherein in the printing of the medium, vertical resolution is formed by controlling a feeding speed of the medium using a feeding roller driver, and horizontal resolution and the ink dropping speed are controlled using a printhead driver that controls nozzles of the printhead.