JPS58194541A - Recording method - Google Patents

Abstract

PURPOSE:To obtain a colored picture of excellent quality, by conducting intermittent dot recording of each line and/or each column of a recording dot matrix in the forward passage of the main scanning and by conducting intermittent recording of the remainder of the matrix in the backward passage of the scanning in a dot matrix printer. CONSTITUTION:A multiple recording head being supplied with three complement picture signals Y, M and C and having 128 recording elements arranged in lines conducts intermittent recording of white or black dots in the first reciprocating scan for each page under the control of a control device which conducts sequential transfer from a page memory to a buffer memory in every step advance at an interval of one line and also sequential shifting. Next, in the backward passage, recording of the remaining lines is made intermittently. Subsequently, in the second reciprocating scan, the same dot recording is performed with the scanning line slided by one from that in the first reciprocating scan. These intermittent scans may be performed so that they form a checkered pattern. By this close mixed presence of dual overlapping dot records, the shift of the tone of color is made inconspicuous, and thus a colored picture of excellent quality can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a recording method that performs main scanning of Don Tomato Links Records by reciprocating a multi-print head, which is a plurality of print element rows arranged parallel to each other, in a direction perpendicular to the print element rows. In particular, the method is designed to prevent image quality deterioration due to color tone deviations between recordings due to overlapping recording by a plurality of recording element arrays.

Various types of recording devices are known as recording devices that perform donto-to-link recording using this multi-recording hand, such as ink-end printers, wire dot printers, and length-to-multiple hand printers.
An ink side printer serving as a self-recording device is generally constructed as shown in FIG. For example, the first to fifth multi-nozzles are arranged in order from the left, and the fans (CJ, magenta (M), yellow CY) and black Ink of each color (K) is ejected, and ink of each color is supplied to each multi-nozzle head from an ink tanker through a flexible pipe J, and a large number of inks are supplied to each multi-nozzle head. Drive signals are supplied to the arrayed and buried OJ flexible insulating belts 5-/-j-e, the relay terminal board 6, and the integrated power supply belt 7, respectively. Endless bell (endless bell) in which a Φ-yringe l with a configuration of 1 and 2 is placed on a guide rail l and connected together. is driven by a pulse motor 70 to perform main scanning by reciprocating the carriage l in the X direction in the figure, and connects the stretched recording paper 12 via roller pair /3 and lch to roller pair /+1 vc. A sub-travel is performed by feeding the ink in the Y direction in FIG. 1 using the pulse motor /S, and a color image is recorded on the recording paper /2 with each color ink jetted from each of the multi-nozzle printers 1 to 2. In addition.

On both 14 of the round trip route of the carriage l, there are stombas//
The main scanning range is determined by arranging -/ and //-.

The manner in which a color image is recorded by the ink side printer configured as described above is illustrated in FIG. 1. In other words, when recording a color image CP by sequentially scanning the head in the left and right directions while feeding the recording paper/2 in the direction of the arrow in a stepwise manner, , - The order of double wI logs of the same dont performed sequentially from the left in row 5 hend run f/ in the middle right gyrus is shown in Figure 3 (A). (Y).

Magenta (M) and cyan (C) are applied in this order, and then in the head scan λ which is performed to the left in the figure, the same dont is overlapped by the marten nozzle hand λ-1-co JK, which is also arranged in order from the left. Change the recording order to 1. Figure 3 (BJ
K') Ic, cyan (C), magenta CM), yellow (Y) are on the recording paper/2 in this order, and the heavy I on the forward and backward passes of main scanning and VC! The order of recording is reversed.

Then, when ink of different tones was sequentially deposited on the recording paper 12 to form a layer 8, it was written directly onto the recording paper /2!
Since the ink coated on the recording paper 72 is collected by the recording paper 72, the size of the recording dot is the same as the thickness of the thread of the ink that was ejected, whereas Since the first ink is well absorbed and spreads without any ink, the size of the recorded dot is larger than the first ejected ink.If the order of the color tones of the ink recorded in the same way is different, the size of each color ink dot will be different. In addition, the state of absorption and reflection of the incident white light by each color ink that is repeatedly recorded also differs depending on the order in which each color ink is repeatedly recorded. Therefore, the color tone obtained by subtractive color mixing of the three complementary colors, quan (C), magenta (M), and yellow (Y), will differ due to the difference in the order of overlapping recording of each complementary color ink, and the above-mentioned head scanning l 21, that is, in the forward and return passes of the main scan,
Even if subtractive color mixing of three complementary colors is performed at the same mixing ratio, there will be a deviation in the actual recorded color tone, and horizontal stripes due to the color tone deviation will occur in the recorded color image due to the reciprocating movement of the multi-nozzle head, which will affect the quality of the recorded color image. The disadvantage of this conventional aiI shaft blade shaft method was that it could lead to damage to the shaft.

The object of the invention is to obviate the above-mentioned drawbacks of the prior art.

An object of the present invention is to provide a recording method that prevents deterioration in the image quality of recorded color images due to deviations in subtractive color mixture tone caused by differences in the order of non-alarm recording in the forward and backward passes of main scanning due to the reciprocating movement of a multi-recording head. .

In other words, in the recording method of the present invention, it is possible to eliminate the deviation of the reduced color mixture tone caused by the difference in the order of overlapping printing in the forward and backward passes of the main scan due to the reciprocating movement of the multi-recording head without being accompanied by a low recording speed. , by skillfully dispersing fine VC in the recorded color image to make it virtually invisible, deterioration in the quality of the recorded color image is prevented.

Referring to the drawings below, present invention 1! ! r: Explain in detail.

First, based on the above-mentioned difference in the order of heavy Il recording between the outbound and return passes of the printing section 11F due to the reciprocating movement of the multi-recording head, when using the conventional method No. An example of the generation of horizontal stripes is shown in Fig. 1. That is, each recording dot of the head scan l indicated by the white circle in the figure is, for example, yellow (Y), magenta (M), cyan (C). On the other hand, for each recording ton of head scanning indicated by the black circles in the figure, one recording is performed in the order of cyan (C), magenta (M), and yellow (Y). As the order of duplication of each color in the duplication recording is alternately reversed every time the hand scans, horizontal stripes due to color tone deviation appear as shown in the figure, with a width corresponding to the length of the recording element row of the multi-recording head. The quality of recorded color images is significantly impaired.

On the other hand, in the recording method of the present invention, for example,
As shown in FIG. Main red scans are performed intermittently on both the outward and return passes so that the recorded dot rows on the return pass shown by are alternately mixed. As a result, the II! caused by the difference in scanning direction!
The color tone deviation of the recorded dots is finely dispersed in the recorded image and becomes inconspicuous, and image quality deterioration due to such color tone deviation can be prevented. Regarding the multi-recording head, which is normally an on-demand type, -1: The ink ejection response speed of the head is lower than the head movement speed key, so even if a reciprocating scan is performed every 1M head scans, the recording will not be possible. As for the overall speed, there is not much difference (1 point) compared to the conventional hend movement, which is performed only in one direction alternately.

An example of a schematic configuration of a recording control circuit according to the method of the present invention that performs intermittent recording as described above is shown in the sixth factor. In the illustrated configuration 11, for example, processing such as complementary color conversion and masking is performed on each daisymel primary color signal converted from a three primary color image signal obtained from an image ψ reading device such as a color television camera,
1m of each color! Three complementary color recording signals -1'+(Y), (M), (C) for each pixel consisting of a 1×41 dot matrix formed by a signal color pattern generator are stored in a page memory for each color of the recorded image. C, access is made by address signal ADH from the control device, and D
Similarly, from the control table @2/, each complementary color (Y), CM), (C) is summarized for 4L111 elements of the /line number reference focus of each stroke signal consisting of the DADONTO matrix, in a word unit of /6 bits. In response to the application of the read signal READ,
"+1" is read out sequentially, supplies 23 VC of Batzer memory for each complementary color (Y), (M), and (C), and outputs a built-in launch signal LkTCH from the same control table *2/. (b) We had lunch on the road, and then we went to yj 1 as well.
Shift signal from 1*2/1auxyTcyoQffi
lEb(.

Then, each complementary color image signal g(Y), CM) is sequentially supplied to the built-in shift register, and each complementary color image signal (g(Y), CM) is supplied to the built-in shift register.

(C) is stored in the shift register, each of the complementary color image signals of 7 1/1 focus is sent to each of the multiple recording heads on the multi-recording head by the recording command signal PliINT of the controller 1c2/Kaya. VCs are issued one after another at an appropriate timing according to the I14 of the recorder row.

Each complementary color (Y), (M) is sent to a multi-recording head B in which l recording elements are arranged in a row through two head drivers for each complementary color (Y), CM), and (C). .

(C) and sequentially supply each complementary color (YJ, CM) onto a recording paper (not shown), every (C) #'clk! Record.

As described above, each complementary color image signal (YJ, (MJ
.

tC) to the multi-recording head 23 at the same time.

Each counter counts one in preparation for the control device I12/.

Valve the pulse motor drive drums formed respectively for the hend movement direction Px and the hend movement direction I#I DIR'r to supply the hend feed pulse motor 1 to move the multi-recording head B in the desired direction. As the device is moved one by one, the recording paper advance signal PY is supplied to the paper feeding Hals motor JLIC via the pulse motor driver I, and the recording paper (not shown) is moved by the recording width of the multi recording head J. send. The head step signal PXt)/pulse advances the head by 1, that is, 16 # of white circles or black circles in the recorded image.

Next, the processing steps of the recording method of the present invention in which 1cj+5 is recorded using the recording control circuit #lty as described above with the dot configuration shown in FIG. The process will be explained according to the flowchart shown in (C).

FIG. 7 LA) shows the entire process of recording an image in the manner shown in FIG. The number of times, that is, the number of paper feeds, is O.
rlII that the image record of the page was reset to the beginning of the image recording.
After the confirmation, the process moves to step 782 and the tC
A one-way run in either the left or right direction as described later* CALL
In the processing process by the "5CAN" subroutine, white circle dots are sequentially recorded in the rightward forward path of the hand scan l shown in FIG. Then step 87 K C
In the configuration shown in FIG. 6, the multi-recording hect is moved by l pinch from the position of the white circle in the forward scan to the position of the black circle in the backward scan according to the head walk signal PX from the control device I, and then the process moves to step 841. Then, the scanning direction is reversed based on the head movement direction instruction signal DIRT K from the control device, and the process moves to backward scanning. Then, in step 8j, the one-way scanning CALL "8CAM" subroutine is executed.
Black circle dot recording is performed sequentially in the leftward return path of head scan l, and then, in step 8≦, reciprocating scan N5C is performed.
After increasing the number of AH steps to 4, move to step 7187K, and perform 16 round trip scans N to record images for 1 page.
It is determined whether or not 8CAM has been performed, and since the end scan 1 has just been completed and the state is N8CAN=/, the process moves to step 81. In step 8rVc, the recording paper advance signal PY from the control device U is
Accordingly, the paper is fed by the length of the recorder element row of the head in order to transition from head scan 1 to head scan 2VC, and then.

Step S? Then, the scanning direction is reversed by the head movement direction instruction signal DIR'l' from the control device l, and the head scan moves to forward scanning. Then, in the process from step 8IO to step 81j, the steps from step S2 described above are performed. After performing the same reciprocating scan as in the process up to step 7787, the number of times of reciprocating scanning NSCAM has not reached 1, so step 8#;

Step 1117, step 718F, step 8? After performing the same paper feed and reversal of the scanning direction as in step 7182, the reciprocating scan of head scan 3 is performed, and the same head scan is repeated thereafter to perform reciprocating scan N8CAN.
When the number of times reaches /6K, it means that image recording for 1 page has been completed.

Next, the above-mentioned one-way scan CALL @8C■" subroutine consists of the 71st (B) A counter CNT that counts the number of times the
In step 821, it is determined that the count value of IL/ is O and that the multi-record hect is reset to the starting point of the reciprocating scan.
Then, in step S here, the configuration shown in FIG. 6 is transferred from page memory B to banker memory 2? For #mentioned! Each complementary color field image signal of word tit focus (
For the data bank transfer CALL "DPACK" with Y), CM), and CC) as one bank, the image signal for recording is transferred according to the subroutine described later in FIG. In response to the application of the recording command signal PRINT from I.

For each color (Y), CM), (C) / Punk / 2! Read out the in-focus image signals all at once from banker memory B,
Each color (Y) is captured through the head driver J.

(MJ, (C) is supplied to each recording element row, and dot recording of one row of white circles or one black circle in the mark #1lilK shown in the first diagram is performed. Next, in step 8J da, a hect increment signal is The force sensor CNTR/in the control device 3 forming PX
Add the count @VCJ and get the number! As shown in the figure, find a new count value when the step YL/of the first column of VC% is obtained, and then, in step 8, perform one-way scanning with the new step signal PXσ' count value given in advance. The total count value Pil
D) No, 1 one-way scan is completed and 1 is n-100. Since the &1 one-way scan subroutine has been completed at the second time, it moves to the next step of the main routine. Send Px11' and increment one column Il[.

Next, the process returns to step S and the above-described process is repeated until the one-way scan is completed.

Next, the above-mentioned one-way run 1 (data bank transfer CALL of step 8-2 in the CALL subroutine)
DFACK ” (7) IF” k -f 7 f@
, Fig. 7 (C, l K consists of a flowchart shown in Fig. 7, and as will be described later for #!1 figure, the image for %ll squares is I/co x 5/co pixel matrix). 1 pixel of 1 bit in 1 row of 1 pixel consisting of 1 pixel) t focus for / word, 1 word
When the col focus is set to L bank, the recording data bank DPACK for 7 times of the recording element array is scanned in one way. The data is sequentially transferred to the memory 2J, 77 copies are sequentially generated, and the data are sequentially output in parallel and sent out all at once. That is, in step 3/, 1# image data from page memory n is panned word by word from page memory 2? If the launch signal LATCH is launched at Specify the data address of page memory n, then step 877
At , the read signal READ is supplied from the control device I.
Read the data of word 16 bits, and then, at step 83, send the control device IJ/karau7 signal @LATCHY
Panzer memory n is supplied to launch image data of 7 l words/6 bints. Next, step 8Jj
K.

After confirming that the count value of the counter CN'f'RJ in the control device 1J/ that counts the bit address of the next l word 14 pinto is reset to O, the process moves to step 874, and the control device I [1 to Zobuto signal 8H
IFT is sent to soften the image data in Panzer Memory n sequentially by VC16 focus, and then step S
At 37, the address counter CNTR, ? l to the count value of
Add up to find the next bit address.

Next, at step 71831K, the count value of the focus address counter CNTRj is displayed! It is determined whether words/≦bits have been counted, and this process is repeated /4 times to count the next l
Repeat with 1, which completes the 76-bit word focus address specification. Then, in step 839, the lunch counter C
NTRJ (Add D count value Kl and store Baku7T memory n
Increment the number of lunches per word, and then proceed to step 7.
18170 K, launch signal LATCH to launch l word 16 bit image data in Panzer memory n
It is determined whether the count value of the counter CNTRr in the control device 12/ which counts the number of sends (b) has reached the number of launches IK for l punctures and l words.
until it reaches.

Repeat the above process. An example of how image data is stored for each complementary color (Y), CM), and (C) in the page memory in the configuration shown in FIG. 6 is shown in the r-th page. In other words, the image data for one page is expressed by representing each pixel using a 4IX dot matrix, assigning a bit address to each dot, and arranging the pixels in a matrix of St pixels in both the vertical and horizontal directions. Focus addresses are sequentially assigned to the right, with the end being the focus address O. A data bank corresponding to the hend width in which the recording element array in the multi-recording head simultaneously records seven l words and 76 bits of l words, where each pixel's dah element of one row dubint in the reference Let l punk JJ image g/col bit be a data bank of # image data.

Therefore, image data for 1 page both vertically and horizontally:
The St pixel and the word 20 are in focus. The l-page image data configured in the pintomatolinks is scanned back and forth every K1 rows in the vertical direction from the upper right end in units of l data banks, and sequential head scans are performed in accordance with the image recording mode shown in FIG. conduct.

M-horizontal conversion, which requires head scanning, allows you to avoid the hassle of focus access and perform word axes efficiently5.
Make it. For example, in the forward path of the head run *l, as shown in Figure 1, word access is performed every other row sequentially, starting from the image data of the t word of the 1st bank with the word address IO~/27.

Paper is fed stepwise by the width of the head to record an image as shown in FIG.

Therefore, the word address access mode in the reciprocating scan of the multi-recording head is, for example, as follows.

(1) 1 core 0 to 1 core (2) 774 to 313 (3) 6J core to 63q (102 core)
Coro 2001-26 Kois (1) Coro 2/1
6~Koro 2/4'J(2) 26/l#0-2
6/117 (1023)! 0 da ~ I
I/(1024) ko4It ~ koSS head running fko (outbound) (1) kogo ~ kogo7 (2)
da96~jO3 or more [af! When the multi-recording head performs reciprocating scanning as described in A (intermittent recording for dispersing the color tone deviation of the overlapping recorded dots that occurs), as shown in Fig. 5, the relatively simple intermittent scanning of every other column is Crab.

For example, as shown in FIG.
In addition, as shown in FIG. 70, the overlapping recording dots in the head scan can be mixed finely in the direction of one row, that is, in the direction orthogonal to the head scan direction, in the forward and backward directions of the head scan. It is also possible to make overlapping recorded dots appear alternately in every other line.As is clear from the above explanation, according to the present invention, a recording device for recording dot matrix images, such as an inkjet printer, etc. In f, the color tone deviation between the overlapping recording dots that occurs in the forward path of scanning of the multi-recording head and the u circuit can be reduced by VC by densely mixing two types of 11M recording dots. Based on this, it is possible to prevent temporary deterioration due to horizontal stripes, etc., which conventionally occurs in recorded images, by making one color tone shift less noticeable, and it is possible to obtain high-quality recorded color images.

[Brief explanation of the drawing]

11/IW is a perspective view showing the schematic structure of an inkjet printer, FIG. 2 is a line diagram schematically showing the mode of screen scanning of the multi-recording head, and FIGS.
) is a side view comparing and showing the difference in the structure of overlapping recorded dots in the forward and backward passes of the head scan, and Figure 1 shows the same recorded image. . Figure 5 shows the manner in which color tone shift occurs, and Figure 5 also shows the distribution of color tone shift in images recorded by the recording method of the present invention.
Diagram showing an example of i, t! Block diagram showing a configuration example of the mackerel control circuit, FIG. 7(A) ~
(C) Figure 1 is a diagram showing an example of the mode of image data storage in the same recording control circuit; Figures 1 and 10 are diagrams illustrating other examples of dispersion of tone deviation in images recorded by the recording method of the present invention. l...carriage, λ-/-coder...multi-nozzle head, 3...flexible pipe, da...ink tank,! −／−j
-Da--Flexible insulating belt. ≦...Relay terminal board, 7...Comprehensive power supply belt. l...Guide rail, endless belt. 10, /j...pulse motor, //-/,
//-2...Stock 7th (.12...Recording paper % /J, /#--Roller pair. I...Control device, 〃...Page memory,
n...Pants Amemory, 2 Tei...Hent Dry/<
1b...Multi recording head, 藏1...) Kurusu motor dryer, 舊J'? "'Pulse motor. Figure 6 Figure 4 Figure 7 Figure 7 CB) 7th position (S1° o/) 4c" Figure 9

Claims (1)

[Claims] A plurality of recording element arrays are stacked in parallel and moved back and forth in a direction perpendicular to the recording element array to perform main scanning for dot matrix recording. Intermittently record a number of dots smaller than the total dots of the recorder in at least one of the columns, and intermittently record the remaining dots in at least one of each row and each column (III) in the return pass of the main scan (1e). The recording method is characterized in that the forward and backward passes of the main scan are made to differ in the order of 1L of overlapping recording by the plurality of recording element arrays.