Patent ID: 6102510
Filing Date: 2000-08-15
Classification: B41J,G06K

Abstract:
A recording head system for an ink jet recording apparatus which performs recording in accordance with recording data, said system comprising:a recording head including a plurality of discharging portions for discharging ink, a plurality of ink passages each of which communicates to one of said discharging portions, a common ink chamber for storing ink supplied to said ink passages, and a plurality of ejecting means each of which is disposed in one of said ink passages for discharging ink droplets from said discharging portions in response to the recording data, said plurality of ejecting means being divided into two or more blocks;comparing means for comparing a number of said ejecting means to be driven in each of the blocks in accordance with the recording data to a predetermined reference number, which is an average number of said ejecting means to be driven in each of the blocks, to obtain a result of comparison of the number of said ejecting means to the predetermined reference number in each of the blocks; andcontrol means for controlling timings of driving of the blocks such that 1) an interval between driving a first block and driving a second block next to the first block is determined in accordance with the result of comparison of the first block generated by said comparing means, and 2) a variation in an amount of ink ejected by driving the second block, which variation is caused by driving the first block, is decreased relative to an amount of ink elected when driving the average number of said electing means in the second block.