Patent ID: 7681979
Filing Date: 2010-03-23
Classification: B41J

Abstract:
1. An inkjet printing system capable of automatically calibrating non-uniform speed of a printhead carriage, including: a test pattern generator, which generates at least one test pattern; a printing device, which is connected to the test pattern generator in order to print the at least one test pattern on a recording medium; an image extractor, which captures an image of the test pattern from the recording medium; a processor, which is connected to the image extractor in order to read and analyze the image of the test pattern to accordingly generate a look-up table; and a printhead carriage control signal generator, which receives an encoder signal with respect to a printhead travel and generates an inkjet control signal for the printhead carriage in accordance with the encoder signal; wherein the printhead carriage control signal generator adjusts a clock of the inkjet control signal in accordance with the look-up table to thereby generate an adjusted inkjet control signal for the printhead carriage to perform an automatic calibration.