JP2522766B2 - Recording device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a recording apparatus, and more particularly to a recording apparatus including a plurality of recording heads.

[Prior art]

For example, an inkjet recording apparatus as a recording apparatus supplies ink to a plurality of ink ejection openings formed in a recording head (hereinafter, also referred to as a print head) and drives the ink ejection openings based on a data signal, Ink droplets are attached to a sheet for recording.

In addition, as a model of the ink jet recording apparatus, a line print model in which an ink discharge port for one line is arranged in a print head to record while scanning in the paper feeding direction, and a print head mounted on a carriage to measure the width direction of the paper There is a serial print type that records while scanning.

Further, in the case of color printing such as a color graphic recorder, a plurality of print heads are mounted according to ink colors such as yellow, magenta, cyan and black.
In such an ink jet recording apparatus, generally, a print head unit including a print head, a head drive circuit and the like is unitized so that each unit can be replaced.

However, in the ink jet recording apparatus, a mechanical deviation between the heads of each color or a mechanical deviation after replacement of the head unit causes a color deviation when the respective colors are overlapped. The deviation must be adjusted to be as small as possible.

However, in such a conventional technique, there is a problem in that it is difficult to accurately adjust the mechanical offset adjustment work.

〔Purpose〕

An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a recording apparatus capable of easily and easily correcting the positional deviation of each recording head with respect to all of the plurality of recording heads. Especially.

The present invention makes it possible to input data according to the amount of positional deviation of each recording head for all of the plurality of recording heads, and based on the input data according to the amount of positional deviation of each recording head, each recording head The above-mentioned object is achieved by changing the recorded data for.

〔Example〕

Hereinafter, a case where the present invention is applied to a line print type color ink jet recording apparatus will be specifically described with reference to the drawings.

FIG. 1 (A) shows a head assembly 8 of this embodiment, which includes yellow 4 _Y , magenta 4 _M , and cyan.
4 _C, and has a structure replaceable (detachable) in an assembly of the print head unit of black 4 _B. Further, ink droplets are attached to the paper (not shown) that is scanned and fed on the front surface of each print head unit _{4Y, M, C, B} to record an image.

In the illustrated example, the head elements 9 are arranged in a zigzag pattern in two rows above and below each head unit, one element is formed with 128 bits (corresponding to the number of ink ejection ports), and 14 sheets above and below are used. ing.

In FIG. 2, the print data Sa sent from the host computer 1 passes through the lateral registration adjusting circuit 2 and then is transferred to the data memories 3 _Y , 3 _M , 3 _C and 3 _B corresponding to the head units 4 _Y to 4 _B. Written. The data written in the data memories 3 _{Y to} 3 _B is sent to the head unit, and the dots corresponding to the data are printed. The switch 7 selects one of the switch data 6Y, 6M, 6C, 6B in synchronization with the select signal Sf from the timing circuit 5 and outputs it as a select signal Sm. The select signal Sm is input to the lateral registration adjusting circuit 2 as a lateral registration adjusting signal.

FIG. 3 shows the data structure of the signal Sa from the host computer 1. The yellow (Y), magenta (M), cyan (C), and black (B) serial signals are printed on the printing paper 10.
The head units 4 _{Y, M, C and B of the} respective colors correspond to each other as shown in the figure.

FIG. 4 is a block diagram of the lateral registration adjusting circuit, and FIG. 6 is an embodiment of the lateral registration adjusting circuit 2.

Serial data Sa from the host computer is input to the 8-bit shift register 11a. The shift outputs Sb 0 to ₁₅ of 11a _{1 and 2} are input to the selector 12 and select Sc by the select signal Sm.

The selected Sc is input to the shift register 11b,
By latching the shift output Sd by the data latch 13, parallel data Se is obtained. That is, since the data in the latch 13 can be changed by changing the select signal Sm, the lateral registration adjustment can be performed.

For example, as shown in FIG. 1 (B), if the cyan print head unit 4 _C is displaced by 2 dots as shown in the figure, the data printed at 4 _C must be data shifted by 2 dots. I have to.

In FIG. 3, the cyan head unit 4 _C is displaced from the paper 10 by 2 dots to the left.
In the figure, the print data written in the data memory 3 _M for the cyan head unit must be delayed by 2 dots from the data of the other head unit.

For example, assuming that the serial data Sa sent from the host computer 1 in FIG. 4 is the data shown in FIG. 5, the shift outputs Sb 0 to ₁₅ of the shift register 11a are as shown in FIG. 5 (A). Like

Now, Sb1 is selected as the select signal Sm to the print head units of yellow 4 _Y , magenta 4 _M , and black 4 _B , and the latch clock Sg of the data latch 13 is t7 (Sg) in the figure.
It is supposed to be latched by. The signal Sc selected by the selector 12 when Sm = Sb1 is shifted by the shift register 11b as shown in FIG. 5 (B) to obtain the latch signal Seymb. The Sd7 side of the latch signal Se is on the left side of the sheet 10.

On the other hand, for the select signal Sm for the cyan 4 _C print head unit, by selecting Sb3, Seymb
Sec delayed by 2 dots can be obtained as shown in FIG. 5 (C). That is, the cyan head of FIG. 2 (B)
The shift of 2 dots of 4 _C can be adjusted by changing the value of the select signal Sm.

Generally, as shown in FIG. 4, any lateral registration adjustment can be performed by the number of shift registers 11a.

〔effect〕

As is clear from the above description, according to the present invention, it is possible to input data corresponding to the positional deviation amount of each recording head for all of the plurality of recording heads, and the positional deviation amount of each input recording head. By changing the print data for each print head based on the data according to
It is possible to easily and easily correct the positional deviation of all recording heads in the arrangement direction of the recording elements.

[Brief description of drawings]

FIG. 1 (A) is a perspective view showing an embodiment of an ink jet recording apparatus to which the present invention is applied, and FIG. 1 (B) shows a state when the head unit shown in FIG. 1 (A) is laterally displaced. FIG. 4 is a front view, FIG. 2 is a block diagram illustrating a print data processing system in the present embodiment, FIG. 3 is a view illustrating the structure of print data sent from a host computer, and a print position on paper, and FIG. Is a block diagram showing an example of the lateral registration adjusting circuit according to the present invention, FIGS. 5 (A) to 5 (C) are timing diagrams for explaining the operation of FIG. 4, and FIG. 6 is a more specific example of this embodiment. It is a block diagram showing a typical circuit configuration. 1 ... Host computer, 2 ... Lateral registration adjustment circuit, 3 _Y - _B ... Data memory, 4 _Y - _B ... Print head unit, 5 ... Timing control section, 6 ... Digital switch, 6y- _B ... ... Digital SW data, 7 ... Switch, 8 ... Head assembly, 9 ... Head element, 10 ... Print paper, 11a, b ... Shift register, 12 ... Selector, 13 ... Data latch, Sa ... ... print data from the host computer, Sb ... shift output of the shift register 11a, Sc ... output data of the selector 12, Sd ... shift output of the shift register 11b, Se ... parallel sent to the data memories _3Y to _B data, output from Sf ...... digital Sw data 6y~ output of _B from the timing circuit and selects, Sg ...... latch clock of the shift register 11b, Sm ...... switcher 7 to select the Sc , W _Y ~ _B ...... data memory 3 write signal to the _Y ~ _B.

Claims (1)

(57) [Claims] 1. A recording material having a plurality of recording elements arranged in a first direction, arranged in a second direction different from the first direction, and recording material according to recording data input from a host device. A recording device for recording an image on the recording device, comprising: an input unit capable of inputting data according to a positional deviation amount of each recording head in the first direction for all of the plurality of recording heads; Changing means for changing the print data for each print head based on the data corresponding to the positional deviation amount of each print head inputted from the input means, when the data is inputted; A recording apparatus for recording an image on a recording material by driving each recording head according to recording data.