| 摘要 |
The present invention has two aspects. In both aspects, a nominal, fixed matrix of droplet print positions is. no longer rigidly adhered to when deciding which droplets to print. A first aspect relates to a continuous stream ink jet printing system generating a plurality of streams of ink droplets. The second aspect relates to an impulse ink jet printing system comprising a plurality of droplet generators. In both the first and second aspects, the nominal matrix is defined corresponding to the positions at which droplets can be deposited on a substrate moving at a predetermined speed relative to a print head of the system. In the first and second aspects, a control means of the printing system is arranged to create a set of droplet print positions ideal for representing an image to be printed, which set is permitted to include print positions offset from print positions of the nominal matrix, at speeds of operation less than the predetermined speed the control means comparing the positions at which droplets can be deposited at the lower speed with the set of ideal positions, the control means deciding which droplets to print in dependence on the comparison. <IMAGE> <IMAGE>
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