Synchronization of printing and print media in a printer module

Abstract

A method of printing an image from image storage memory in a printer module includes the steps of a print generator unit of a printhead interface retrieving the image from the image storage memory and transforming the image to a form suitable for a printhead. A first synchronization signal is generated to advance a paper drive stepper motor then a second related synchronization signal is generated to synchronize transfer of the image to the printhead. The transformed image is transferred to the printhead for printing by the printhead on a printable media advanced by the paper drive stepper motor in a synchronous manner.

1 . A method of printing an image from image storage memory in a printer module including the steps of: 
 a print generator unit of a printhead interface retrieving said image from said image storage memory and transforming said image to a form suitable for a printhead;    generating a first synchronization signal to advance a paper drive stepper motor;    generating a second related synchronization signal to synchronize transfer of said image to said printhead; and    transferring said transformed image to said printhead for printing by said printhead on a printable media advanced by said paper drive stepper motor in a synchronous manner.    
   
   
       2 . The method of  claim 1  wherein the step of transforming said image further includes the steps of: 
 up-interpolating said image to a suitable resolution for printing;    dithering pixels in said image; and    formatting said image so that said image is represented by a dot function, each dot corresponding to an ink nozzle of said printhead.