Patent ID: 6331040
Filing Date: 2001-12-18
Classification: G06K,H04N

Abstract:
An apparatus for driving an ink jet record head, wherein a pressure generating element and an opening is provided for each of a plurality of nozzles and said pressure generating element is actuated to cause an ink droplet to spout from the opening, said apparatus comprising:a driving signal generation unit that generates a driving signal, which includes a first driving pulse for causing a first ink droplet to spout from said nozzle and a second driving pulse for causing a second ink droplet to spout from said nozzle that is greater in size than the first ink droplet;a driving pulse selection unit that selects at least one driving pulse from the first driving pulse and the second driving pulse in one recording period corresponding to the recording of one pixel;an element driving unit that drives said pressure generating element in response to the selected at least one driving pulse; anda dot creation unit configured to select both the first driving pulse and the second driving pulse in one recording period corresponding to the recording of one pixel so as to create a larger dot than dots formed by the first and second ink droplets.