JPS58194540A - Recording apparatus - Google Patents

Abstract

PURPOSE:To obtain a picture of high quality, by arranging groups of N recording elements in the sub-scanning direction at a resolution element interval of K, while arranging them in the main scanning direction in M columns each being set back from other at a resolution element interval l, in a printer of a dot- matrix system. CONSTITUTION:Each of nozzle heads 15Y-15BK of a recording head has nozzles of N=3 each arranged at an interval of K=4 dots, and is arranged at every interval of L=2 dots in stages being set back from each other at an interval of l=1 dot, and it discharges ink of each color of yellow Y, magneta M, cyanide C and balck BK, respectively. Each of the recording heads 15Y-15BK conducts a reciprocating scan of each line SLn intermittently at an interval of one dot from other for recording, and then, paper being fed by three dots, the same scanning is repeated. By this constitution, the deterioration of the quality of a picture can be avoided since another color is applied after the ink discharged previously is dried. In addition, no difference in the tone of colors appears since the ink of different colors is applied in the same sequence in both courses of reciprocation, and thus a colored picture of high quality can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a recording apparatus such as a thermal printer or an jet/jet printer which forms an image m on a recording member using a pixel matrix of recording dots.

In recent years, in cases where high-speed recording using individual recording means is not possible, such as the heat-sensitive recording method, I/KJETO/DIMMER/DO recording method, etc., high-speed recording has been developed by arranging the recording means in a matrix configuration. can be done. A recording device with a built-in construction has been proposed. .

FIG. 1 shows an example of a recording head unit of a multicolor inkjet recording apparatus having such a configuration.

As shown in the figure, the print head unit / is a print head Y that ejects yellow, maze/yellow, cyan, and black ink in the main scanning direction (arrow X direction).

-M, JC 28K are arranged, and each of these heads has three nozzles arranged in the sub-scanning direction (arrow Y direction). In this design, the recording head pre-printed with a matrix configuration of 3 rows and 3 columns performs main scanning on the recording paper, and performs predetermined interlaced scanning in the axial scanning direction. It is formed on recording paper.

However, in a recording device that achieves a multi-color image by scanning multiple i-recording heads that eject all different color inks at the same position on the recording paper and superimposing colored inks, If you overlay other color inks before the color ink that was previously ejected onto the recording paper has sufficiently dried, the color inks will bleed between each other, resulting in a decrease in the image quality of the paper. .

In order to eliminate this problem, as shown in FIG. 7, it is necessary to provide a sufficiently wide interval between each recording head, but the required interval may be limited due to the configuration of the recording head unit. High-speed recording and high-resolution gI depending on the configuration
There was a drawback in that the advantage of the multi-color recording device could not be fully utilized.

In view of the above-mentioned points, an object of the present invention is to provide a recording device capable of performing high-speed recording with high resolution and high image quality. It is about providing.

The present invention will be described in detail below with reference to the drawings.

FIG. 2 shows an example of a multicolor inkjet printer to which the present invention is applied, where // is recording paper and /2 is recording paper/
/l A paper feed roller that feeds in the Y direction, /3r1 a paper feed roller/, a paper feed pulse motor that drives two groups, and /4t a paper guide roller that guides two groups of recording sheets. /j is a multi-nozzle jet head unit that moves parallel to the opposing recording paper /, and is a yellow (Y) nozzle head /j.
jY, Magenta (goods) nozzle head /'', Sear 7 (
It consists of a nozzle head for C)/jC and a nozzle head for black (BK)/jBK for y color.

Here, in the apparatus of the present invention, a recording element group in which N recording elements are arranged at a dot interval in the #1 scanning direction is arranged in M rows at an L dot interval in the main scanning direction, and each recording element group is arranged in M rows at an L dot interval in the main scanning direction. The recording head is constructed by sequentially shifting the dots by t intervals in the sub-scanning direction. Also, the values of t, M and N are AM≦K ・・・・・・・・・・・・・・・・・・・・・
・・・・・・・・・・・・(A) C/) The amount of money involved in one or the other of the ω-types shall be determined as follows.

Recording head in this embodiment/! An example of the configuration is shown in Fig. 3, in which each nozzle head /7 tube' to /3BK is arranged in the sub-scanning direction (upper F direction of the figure small) at an interval of 4 dots.
= each nozzle head with j nozzles /, h
'～/jBK is L= in the main scanning direction (left and right direction of the inner surface)
λ dot spacing spacing head /jY, /J'M.

Direction rct = each nozzle head with setback for each dot interval /! Place Y~73BK. In this embodiment, K=g, t=/, M=da&k, N=3, and ty=, which satisfies the above-mentioned (1) (2). In addition, the third
The dashed-dotted lines in the figure indicate the main scanning lines of each nozzle head /jY to /jBK. Each nozzle head /3Y, #M, /l
c.

/j'BK Fi, by an off-demand method in which ink is ejected every time a pressure pulse is applied, or by a bubble jet method in which a heating element is placed in the nozzle and ink is ejected using bubbles generated by heat generation. Performs a jet of ink.

Next, in FIG. 2, 76 is a carriage unit that loads an inkjet head unit (Jf) and moves back and forth in the L and R directions, and /2 is a head transport unit that moves the carriage unit /6 via a timing belt 7tk. 9 pulse motor, /9 is the guide rail that guides the carriage unit /6, J is the head unit /! The moving position of the sound is detected, and υ is the ink supply pipe,
A flexible wiring board (□□□ electric cable) which supplies a drive signal to each BK of n via 21, J is a flexible wiring board, and a relay chain board that relays between the flexible wiring board 241 and the driver circuit printed board, U. Head unit/! is scanned during reciprocating movement or forward movement, and based on the drive signal (iii. monate acid formation signal) supplied by the two flexible wiring boards, all ink is selectively ejected from the nozzle which is the recording element, and the recording paper/
/ Color original picture fan P4 current record full.

Here, record head/! To explain the entire recording operation, the main scanning direction is driven by a pulse motor 7.
Recording is performed by moving forward or backward at dot intervals, that is, each nozzle of each nozzle head /3Y~/jBK is moved as shown in the third figure to y/, y, 2Y, ? , M/, M
62 goods, CI, C, 2C3 & engineering BK/, BK42
Assuming that the B port is assumed and the nozzle BK/ of the nozzle head /jBK is located on the main scanning line HsL of the recording paper //,
For forward or backward scanning, L9 and main ff1f line ST,
, (st, +x), (SL+f) KU black, 1
Run as a line (SL+/), (st, +4), (st, +
9) includes cyan, main scanning line (SL+J), (';L+
4), (SLY/θ) is magenta, main scanning line CsL
+3), (SL+7), (SL+//) For K, yellow ink is ejected.

After the forward or backward scanning is completed, the pulse motor/3
Then, the CQ recording paper // is fed by the dot interval corresponding to the number of nozzles in each head, that is, the 3-dot interval. 3 (is recording paper/
/ will be interlaced scanned at 3-dot intervals, and the main scanning line (SL +
j) move up. The other nozzles also move uniformly, and each color is printed at the corresponding position of each nozzle by scanning in the subsequent forward and backward movements.

As a result, focusing on the head/JBK shown in Figure 3, by interlacing scanning at 3-dot intervals in the sub-scanning direction, each main scanning line has 1 for each nozzle BK/~BK3 as shown in Figure 3. In general, when N nozzles are arranged in a row in the sub-scanning direction at dot intervals, each of the N When the r nozzle prints Δ at the same time every hour, the condition to prevent double printing and printing omissions is that it is an irreducible fraction.0 In this example, N=3°K= N=g/3, which satisfies the above requirements.

Next, as described above, the main scanning and sub-scanning steps are repeated to perform rainbow recording, but in order to form a multicolor image, each main scanning line must eject a different colored ink. In this example, heads /n to /J'BK must be scanned 19 times per head, which is 19 scans per head.

Generally, if the spatial coordinate of the recording position on the recording paper by the m/th recording head is t Zml, and the spatial coordinate of the <m2*th recording head is 2m2, then In order for the recording head to scan the same position on the No. 19 paper, the following condition must be satisfied: 2m1=2m2 (ml"x; m2).

In this example, for example, in the main scanning line (SL+//) shown in the third figure, nozzles Y3. BK3 This main scanning line (SL+//) is scanned in the order of C, 2, M/, yellow,
Color inks are superimposed in the order of black, cyan, and maze to form a multicolor image. The same goes for other main scanning lines, and each head /, i'~/! The spatial coordinates where the BK sonnozzle is located are ZY, ZMI ZCI Z
ll, the relationship ZY ” ZM ” ZC” ZBK is established for each main scanning line. In other words, the colors yellow, maze, cyan, and yellow are superimposed on the recording paper. A polychrome painting of one elephant is created.

Here, the overlapping of color ink at each printing position on the recording paper // is performed each time the recording head moves forward and backward, as described in 1 above, so the color ink is ejected onto the recording paper //. After one colored ink is sufficiently dried, another colored ink is superimposed on top of another, so there is no bleeding caused by the overlapping of colored inks as in the conventional method.

Next, in this example, it is assumed that the reading head (not shown) for reading on the image of the original is composed of D-7/n. In the figure,
In such a case, the recording head shown in the third diagram /! An example of a control circuit for recording is shown below.

In the figure, BS, C8, MSL, and Y8 correspond to the original i** read through a reading head (not shown), and are color signals of 9 black, cyan, maze/rio 1, and yellow. ! 7 to 60 are delay circuits, 67 to g4It are switching circuits, and the recording head/! When moving forward, it is set to the position shown by the solid line in the figure, and when moving back, it is set to the position shown by the broken line. ≦! ~7.2 is a delay circuit, Y/~Yj,
M/~Phantom, C/~C3 BK/~BKj are one example of the delay circuit for each nozzle of the nine nozzle heads In, 16M, /jc and /J'BK described above, respectively! /~
In 6θ, the supplied color signal is delayed by 2 dot intervals, and in J-72, the yellow signal YS is delayed by 9 main scanning lines. A signal YS is supplied to the nozzle Y3 via the switching circuit 64 and delayed by a main scanning amount line via the delay circuit 77 to the nozzle Y2.
through delay circuit 7/, 72k? The color signals YS are supplied at the same time with a delay of a main scanning line. On the other hand, when the maze/return signal M8tf is forward, the switching circuit 63
Through the delay circuit! After being supplied to the nozzle and delayed by the dot interval, the No. C8L delay circuit is supplied to the nozzle. ! niL
Each nozzle C3 to C is delayed by the jig dot interval.
The black signal B8 is supplied to the delay circuit! /,
zx, by '3≦dora, between li%e! □□”C-
% /

As a result, each nozzle Y/~Y3.
M/-4? , C/~C3o! Hi BK/ ~B
Signals of the image of the original document corresponding to the 6 portions at position KjO are supplied. head/! If ink is ejected according to the supplied color signal in synchronization with the forward movement of the
/ The original image is played above. In addition, during the backward movement, the switching circuit 6/-6 is set to the position shown by the broken line, and a delay operation opposite to that during the forward movement is performed, and the original
m' is reproduced on the recording paper //.

In this example, the head configuration satisfies the above-mentioned set, but the values of K, M, N, and t are each such that tw ) K, K, (N-/)+/ > t. In the case of head configuration, each nozzle head /n~/jB
In order for K not to print on the same main scanning paper above /recording the scanning amount, Vt must be an irreducible fraction.In other words, even in the case of a head configuration that satisfies the above set, even if the head configuration satisfies the above set, The control circuit shown in the figure 19 easily records the original image on the sickle paper//recording head/! Recordings can be reproduced by reciprocating motion.

As explained above, in the present invention, N recording elements are arranged 1'lk at dot intervals in the thermal scanning direction, and M rows of recording elements are arranged at L dot intervals in the main scanning direction.
A pixel matrix of (NXM) dots was constructed by arranging each recording element group sequentially shifted by t dot intervals in the sub-scanning direction.

The values of t, N and K are determined to be irreducible fractions, and the values of t and M and N are set such that t-M≦ or the number of rL was determined to satisfy one of the relationships.

Further, L9 scans the recording head configured in L L9 M times using a recording element group of M rows on the same main scanning line to form M records based on M signals on the member to be recorded. I made it possible.

As a result, for example, the present invention can be applied to a multicolor recording device that forms a 1 color image by overlapping 1/Mll color inks based on M color signals, and M rows of recording elements can be used. If colored ink is ejected in correspondence to /pair// of group tM color signals, a different color ink is applied on top of the ejected color ink after sufficient time has passed for it to dry. can be superimposed, and deterioration in image quality caused by bleeding between overlapping color inks can be avoided.

As described above, according to the present invention, recording elements can be arranged in a matrix configuration to achieve high speed, ? In a recording apparatus that performs i6 resolution recording, high-quality recorded images can be obtained when recording is performed based on a plurality of signals.

[Brief explanation of drawings]

FIG. 7 is a diagram showing an example of a conventional recording head unit;
FIG. 2 is a perspective view showing an example of the configuration of the device of the present invention, FIG. 3 is a diagram showing an example of the configuration of the recording head unit of the device shown in FIG. 2, and FIG. FIG. 4 is a diagram illustrating printing positions, and FIG. 4 is a block diagram showing an example of a control section for driving the recording head unit shown in FIG. 3. /... Recording head unit 1. 2Y, , 2M, 2C, 2BK...recording head,
//...recording paper, /co...paper feed roller,
/3...pulse motor, /ri...unguide roller,
/j...head unit, 7 mushrooms, /jM, /lc, /JBK...recording head, /6...carriage unit, /7...pulse motor, /! ...Taimi/Kuchert, /9...Guide rail, J, 2/...Position S/
=...Ink tanker group, 3...Ink supply pipe, J...Flexible wiring board, J...Terminal board 1.
2j-...Driver circuit printed board, J″/~W, ≦j
~7.2...Delay circuit, 67~Ren...Switching circuit, BS, C8, MS, Y8...Signal 1゛1, Y/ ~Y,? , M/-4? , C/ ~C
3, BK/ ~BK3...Head nozzle, SL,
8L+/, SL+, 2... Main scanning line. Patent applicant Canon Co., Ltd., 4h Figure 3 Door 7 Tari

Claims (1)

[Claims] 1) Recording based on M types of signals while performing main scanning and single scanning in a second direction that is substantially perpendicular between the recording member and the support to which the recording element is attached. In the recording device for forming an image, the N recording elements are arranged at K #m1te element intervals in the sub-scanning direction, and have M rows of n9 recording element groups in the main scanning direction, and the recording elements are arranged in M rows in the main scanning direction. The groups are arranged in steps with the tH image resolution elements being shifted in the sub-scanning direction. Spatial storage 4#I at the scanning position on the recording member L to the recording elements belonging to each of the recording element groups of the m/th column and the mth column of the recording element group.
A recording device characterized in that Zml = 1m2 (mt) m2) where f:n is Zm1 and 1m2. 2. The recording device according to Claim II/Claim, wherein the value of t, M and K is such that tM≦. 3) In the device according to claim 1, the t
, if the value of K is AM ) K, then K(
N-/) +/> 1 A recording device that takes the fact that /l is an irreducible fraction as a 41IF sign. 4) Scope of claims! , 2JA or 11, wherein a recording image is formed on the recording member by reciprocating the support body to which the recording element is attached in the main scanning direction. 5) In the device according to claims 1 to 9, the M types of signals are yellow. A recording device* that indicates that the image signal is a black image signal.