Ink jet head driving device
A technology of driving device and inkjet head, which can be applied in the directions of inking device and printing, etc., can solve the problems of rising production cost and so on
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no. 1 approach ）
[0028] [About inkjet head]
[0029] First, through Figure 7 to Figure 15 , the inkjet head used in such an inkjet head recording apparatus will be described.
[0030] Figure 7 to Figure 10 It is an example of an arrangement pattern of a plurality of inkjet heads 1 included in the inkjet head recording apparatus, Figure 7 is an example using three inkjet heads 1a, 1b, 1c, Figure 8 and Figure 9 is an example using two inkjet heads 1d, 1e, Figure 10 This is an example using four inkjet heads 1f, 1g, 1h, and 1i. The length, the number of nozzles, and the nozzle pitch of each inkjet head 1a-1i are the same.
[0031] Figure 7 This is an example of an arrangement pattern when the length of the inkjet heads 1 a , 1 b , and 1 c is short relative to the width of the printing paper 2 . In this example, three inkjet heads 1a, 1b, and 1c arranged so that the arrangement direction of the nozzles coincide with the paper width direction perpendicular to the conveyance direction...
no. 2 approach ）
[0103] In the above-described first embodiment, the random number generator 34A is composed of a plurality of linear feedback shift registers 341, 342, and 343, and generates bits whose numbers are compared to the correction data input in the drive waveform generator circuits 31-1 to 31-N. A random number composed of a smaller number of bits. Then, the bits b0 to bm of the pseudo-random numbers respectively generated by the linear feedback shift registers 341, 342, and 343 follow the logic of "do not repeat the same output bit of the pseudo-random number among the bits of the same weight input to the correction data", It is assigned to the respective driving waveform generating circuits 31-1 to 31-N. Therefore, the minimum required linear feedback shift register is calculated from the total number of correction data inputs to the drive waveform generating circuits 31-1 to 31-N and the bit length of the pseudo-random number generated by one linear feedback shift register. numb...
no. 3 approach ）
[0109] In the second embodiment described above, the random number generator 34B is constituted by one linear feedback shift register 344 . The random number generator is not limited to the first or second configuration described above.
[0110] Figure 17 A random number generating unit 34C having another configuration is shown as a third embodiment. In addition, to and Figure 4 Common parts are marked with the same symbols, and their descriptions are omitted.
[0111] Such as Figure 17 As shown, the random number generator 34C is composed of N linear feedback shift registers 340 - 1 to 340 -N equal in number to the discharge channels ch.1 to ch.N of the inkjet head 1 . The respective linear feedback shift registers 340 - 1 to 340 -N correspond to the respective drive waveform generating circuits 31 - 1 to 31 -N provided corresponding to the discharge channels ch.1 to ch.N in a one-to-one manner.
[0112] The linear feedback shift registers 340-1 to 340-N share the inp...
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