Importance

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Abstract

To record a multi-valued image by an ink-jet head, an ink droplet is jetted from a recording element (nozzle) for the number of times corresponding to the density of a pixel to be reproduced. Accordingly, the pixel data to determine the number of ink-jet operation is expressed by a plurality of bits and the data of each bit are transferred to a plurality of shift registers at a time. Each shift register has storage capacity based on bit data corresponding to the number of recording elements of a recording head. When data transfer is completed, a driving signal is supplied to the recording head. The driving signals are counted and each recording element is driven based on the count result and the data stored in each register.

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First Claim