JPH06127032A - Recording device - Google Patents

Abstract

(57) [Abstract] [Purpose] The interlaced recording method, multiple output dots, and dot correction processing are used in combination to reduce the invalid recording area as much as possible, and stabilize against unstable factors such as device mechanism variations. To provide a recording device capable of high-resolution recording and high-speed recording. [Structure] A recording element group 206 composed of N recording elements at K dot intervals in the sub-scanning direction, a buffer memory 203 for storing information data as image data, and a correction process according to the recording element arrangement from the buffer memory. The processing means 204 for selecting and processing the image data to be processed and supplying it to the printing element, and the control means 205 for controlling the main scanning operation and the sub-scanning operation for printing in the printing element group are provided as a printing operation by the control means. , P for each main scan of a row of multiple recording elements
After the feed in the sub-scanning direction for the dot interval is (K-1) times, the operation for feeding the sub-scan feed for the S dot interval once is repeated. The value of S is S = K × N− (K−1) × P dots.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus for forming an image or characters on a recording material such as paper by a set of recording dots such as an ink jet printer.

[0002]

2. Description of the Related Art Ink-jet color recording has been put into practical use as a mainstream technology for low-priced color printers because it can be structurally easily achieved by providing inks of respective colors. In a general serial printer as shown in FIG. 1, in order to express a monochrome or color image at high speed and with high quality, the density of the nozzle of the printer head is increased to increase the density, and the head is lengthened in the sub-scanning direction. Therefore, it is necessary to increase the number of nozzles and increase the speed. However, the higher density of the head requires higher precision of the mechanism mechanism including the head, which increases the manufacturing cost.

Therefore, an interlace driving method has been disclosed as a countermeasure against this. This is a structure in which a plurality of identical comb-shaped heads are arranged side by side in the main scanning direction and are shifted in the sub scanning direction. By this, the sub scanning is performed, so that one dot line is not recorded. It becomes possible to sequentially record and fill the part. Different colors such as Y, M, and C are put in each head. Japanese Patent Publication No. 3-76226 is an example of this interlaced driving method. This is a unit recording element group in which N recording elements are arranged at K dot intervals and is a multiple of N in the main scanning direction.
The dots are staggered and arranged on the stairs, and N is set for each main scan.
This is a method of feeding by sub-scanning for dots and recording. As a result, it is possible to prevent the other color inks from overlapping with each other before the color inks ejected onto the recording paper have dried sufficiently, and the order of the recording colors can be kept constant. After that, N for each main scan
This interlace drive method of performing sub-scan feed for dots is called an equal-interval sub-scan feed interlace drive method.

FIG. 14 shows the driving situation when the number N of nozzles is relatively large, N = 15, in this equal-interval sub-scan feed interlace driving. The square frame on the left side of 1401 is a recording element head composed of unit recording element groups in four rows, and each unit recording element group has a nozzle number N = 15 dots and a nozzle interval K = 4 dots. Further, each unit recording group is arranged at H = 15 dot intervals in the sub-scanning direction. 1
The black circle dots M1, M2, M3, and M4 of 402 indicate the recording positions of each unit recording element group, and different colors are prepared for these recording element groups. Reference numeral 1403 indicates the number of sub-scans, which is T1, T2, T3, T.
At step 4, one stroke is completed and the same operation is repeated. When the main scanning of T1 is completed, the recording element group is fed by P = 15 dots in the sub scanning direction, and the next main scanning of T2 is performed. The dots indicated by black circles are recording dots. For M1 color, six main scans are performed, and for M2 and M3 colors, only T1 is used.
For the M4 color, T1 to T4 are described. As can be seen from the figure, the dots corresponding to the recording nozzles are printed by scanning T1, T2, ... And the interface driving is performed so that the vacant portions are gradually filled. A portion indicated by C is an invalid recording area generated due to the comb tooth nozzle head. The details will be described later.

As another interlace drive, one dot line sub-scanning is sent in the sub-scanning direction for recording,
When the head width is filled up, there is a method of feeding in the sub-scanning direction of the next recording unit. For example, when N = 15 and K = 4, the main scanning is performed four times by 1-dot line feeding, and the last fourth scanning is performed by 47-dot line feeding. This interlace drive method is called a 1-dot line sub-scan feed interlace drive method.

In these interlaced drives,
The interval of the final recording dots is determined by the sub-scan feed pitch, and it becomes possible to perform recording with the interval narrowed by the nozzle interval of the head, which is effective for increasing the density.

Now, when recording is performed using the above two interlaced drives and the interval of recording dots is increased,
In order to express images and characters with high quality, the relationship between dot spacing and dot size is important.

Now, let us consider the relationship between the dot pitch and the dot size with reference to FIG. In this example, one dot interval is 360 dpi (dots / inch: the number of dots per inch). The case where the dot size and the dot interval are equal is 15A, and a blank portion that cannot be recorded is generated, which deteriorates the character quality. Therefore, generally, as shown by 15B, the dot size is set larger than the dot interval so that a blank portion does not occur and the connection between dots is smooth.

[0009]

However, in the case of the interlace driving method in which the dot size is arranged larger than the dot interval, the line reproducibility becomes poor. That is, in the interlace drive, the deviation amount of the feed for each dot line due to the feed accuracy of the sub-scan feed is likely to be large in the interlace drive method, and the results shown in the standard recording results of FIGS. 16B and D are obtained. Even if it is desired, a situation occurs in which the thin line to be recorded as shown in the variation recording result is not expressed. Since the dot size is large in FIGS. 16B and 16D, when the displacement amount W = 1/3 dot is generated, an image like a variation recording result which is significantly different from the standard recording result is obtained. That is, the white line between the black lines disappears. Also, 2
In the case of 16C of dot line black and 2 dot line white, the black line becomes thick and the white line becomes thin.

When the sub-scanning is performed, this deviation always occurs as a mechanical variation even if interlaced driving is avoided. Generally, the non-interlaced driving method causes a larger sub-scan shift. Further, as described above, the non-interlaced drive method requires high density of the head. Therefore, the non-interlaced drive is not effective as a low-priced recording device. Therefore, interlace driving and increasing the dot size are necessary conditions for high-density and high-quality recording in a recording method with a low price range.

As described above, when the dot size is made sufficiently larger than the dot interval and recording is performed by the interlace drive,
A deviation caused by a mechanical precision error in driving in the sub-scanning, or a linear deviation in the main scanning called skew or the like causes deterioration of recording such as two thin lines.

Further, there is a recording missing line (ineffective recording area) at the start and end of recording which occurs due to interlaced driving by the comb tooth nozzle head. This is a drawback of the conventional interlaced driving method.

The recording apparatus of the present invention is intended to solve such a problem, and an object thereof is to solve mechanical variations by using an interlace driving method, a one-pixel plural-dot structure, and a correction process. It is an object of the present invention to provide a recording apparatus that has a high degree of tolerance and that does not cause quality deterioration even with some variations. Furthermore, this system is intended to achieve high density and high quality by incorporating a drive for reducing the recording invalid area.

[0014]

In order to solve such a problem, in the recording apparatus of the present invention, a recording material (paper or the like) of the recording apparatus for recording based on an image or character information data.
And a recording element group (nozzles in the head) are arranged at a substantially right angle, and in a recording apparatus that forms an image by moving the head in main scanning and moving the recording material in sub-scanning, K dot intervals in the sub-scanning direction. A unit recording element group composed of N recording elements, or a single recording element group,
A buffer memory that stores the information data as image data, selecting image data that matches the recording element arrangement from the buffer memory, and supplying the recording element together with selecting the image data,
The recording means includes processing means for generating correction data for recording based on peripheral image data, and control means for controlling main scanning and sub-scanning operations for recording by the recording element group. Sub-scan feed is performed by repeating (K-1) times in the sub-scanning direction for the P dot interval and once for the S dot interval in each main scan of the rows of the plurality of recording element groups. It is characterized by However, the following conditions are satisfied.

In the above K and N, K / N is an irreducible fraction.

In K and P, K / P is an irreducible fraction (P≤N
Is a positive integer).

The S is S = K × N- (K-1) × P dots.

The processing means processes one piece of the image data corresponding to the plurality of dots.

Further, the values of K and P are characterized in that K / P is a irreducible fraction (a positive integer such that P <N and P ≠ 1).

[0020]

According to the present invention, the interlace drive method, which is highly effective in improving the image quality, is applied to the recording apparatus to make a plurality of recording dots correspond to the input data, and the recording data correction process is performed to determine the dot recording data. It is taken in, and the effect is brought out by the combined action.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the drawings.

FIG. 1 shows a color or monochrome serial printer to which the present invention can be applied. 10
1 is a monochrome or color head including recording elements, 1
Reference numeral 02 is a recording paper which is a non-recording material, and 103 is a platen. The head 101 performs the main scanning recording operation on the area A in the direction of the arrow. The main scanning operation is performed at a constant speed by using a pulse motor, a DC motor or the like as a power source to record at a predetermined position, and each color is simultaneously recorded during monochrome recording or color recording. After the main scan, the recording paper 102 is rotated by rotating the platen 103 or the paper feed roller (not shown).
Moves in the sub-scanning direction, recording main scanning is performed again,
Recording is done.

FIG. 2 is an embodiment of this patent and shows a block diagram of the components. Reference numeral 201 denotes a processing-related configuration unit, which includes a buffer memory 203, a processing unit 204, and a control unit 205. Reference numeral 202 denotes a mechanism-related constituent means, in which a recording element group 206 is arranged. Upon receiving a recording instruction from a personal computer, a workstation, or the like, the printer recording processing such as character data expansion and graphic expansion is performed in the apparatus, and the recording data is temporarily recorded in the buffer memory 203. The buffer memory is a memory in which the print data is partially aligned, and the processing means 204 calls from this memory according to the print order.
Follow the instructions in. At this time, in order to generate the 1-dot data for recording, the 1-pixel data in the buffer memory 203 is not called and generated as it is, but the 1-dot data for recording and non-recording is performed by referring to the calling of peripheral pixel data. To decide. This processing method will be described later. The data determined by the processing unit 204 is the recording element group 2
The data is transferred to a 06 latch circuit (temporary holding circuit (not shown)). The control unit 205 is a unit that controls all operations such as the operation of the recording head associated with recording, the recording operation instruction to the recording element group, and the movement of the recording paper. In this control means, the interlaced scanning of recording, which will be described later, is carried out.

FIG. 3 shows an embodiment of the recording element group shown by 206 in FIG. 2, and FIG. 3-A shows an example of the monochrome recording element group.
-B and C are examples of color recording element groups. Reference numeral 301 denotes a nozzle unit that ejects ink of the recording element group, and 302 to 305.
Is an ink ejection element portion for causing the recording element group to perform an operation for recording, 306 and 309 are recording element holding portions, and an ink supply portion, 307 is a hole for a shaft that holds the recording element portion,
Reference numeral 308 is a cable for supplying an electric signal to the recording element group and a tube for supplying ink. A plurality of nozzles 301 are arranged at regular intervals, and the recording element group is arranged in one line or in a plurality of lines to form a head as a whole. These heads are attached to the main scanning axis by holes 307 and perform the main scanning operation. A signal associated with data corresponding to a recording position is supplied to the ink ejecting unit 302 and the like through the cable 308 during main scanning to eject ink from the nozzles 301 and perform recording on recording paper or the like. 3-B is an example in which the color nozzles are arranged in the main scanning direction, and 3-C is an example in which they are arranged in the sub-scanning direction. The present invention can be applied to any configuration by setting the nozzle configuration in the sub-scanning direction to the conditions described below. The ink tank may be arranged outside the head or inside the head. However, in FIG. 3, ink is supplied to the head by the supply tube 308.

FIG. 4 shows an example of the arrangement of recording element groups according to the present invention. The recording element group is a constituent element in the head shown in FIG. 3, and ink is ejected from this nozzle,
Dots are recorded on recording paper. 4-A is a recording element group having a single-color single-row configuration, 4-B is a recording element group having a single-color two-row configuration, and 4-C is a color recording element group having a four-row configuration. In each configuration example, the number of nozzles per color N = 15 and the nozzle interval K = 4. As for K and N at this time, K / N is an irreducible fraction.

4-A is simply 15 dots with a 4 dot pitch per row.
The nozzles are arranged. With this configuration, for example, when the nozzle interval is 180 dpi (dots / inch) = 141 μm, it is possible to provide a recording device capable of expressing 1 dot recording up to 720 dpi.

4-B is of a single color and has two columns,
The nozzle spacing in the sub-scanning direction is the same in both rows, the positions in the main scanning direction are displaced from each other, and the spacing in the sub-scanning direction for both rows is K = 4. Due to the manufacturing difficulty of finely arranging in one row, it is arranged in a plurality of rows. Similar to the above, it is achieved with an arrangement of 90 dpi per row to enable the expression power of 720 dpi. In the present embodiment, the interval in the sub-scanning direction is defined, the interval in the main scanning direction may be any interval, and the recording data matched with the main scanning interval is read from the buffer memory and recorded. To do.

4-C is a configuration for color printing of four colors. Ink dots of different colors are recorded on each of M1, M2, M3, and M4. The colors M1, M2, M3, and M4 are, for example, magenta, cyan, yellow, and black. The sub-scanning direction nozzle pitch in one row of each color is K = 4 dots, and each color is printed at intervals of 4 dots in one main scan printing. The nozzle spacing in the sub-scanning direction for each color is H = 7. In this head, interlaced scanning for recording, which will be described later, is performed.

When the respective element groups A, B, and C shown in FIG. 4 are attached to the printer, they are arranged so as to be substantially orthogonal to the non-recording material (recording paper).

FIG. 5 shows one structural example of the embodiment of the present patent.
By the means of the above-mentioned claims, an actual interlace driving method is shown. In the case of a single color, only M1 is used, and in the case of color recording, it is the whole.

First, the case of a single color will be described using the M1 portion of FIG. As described above, the unit recording element group includes the number of nozzles N = 15 and the nozzle pitch K = 4. As in the description of FIG. 14, the number of main scanning prints is represented by T, and 15 dots are printed in the first scan T = 1.
In the second scan, P dot feed is performed in the sub-scanning direction, and T
= 2 scanning is performed. The value of this sub-scan feed amount P is K
/ P is a irreducible fraction (a positive integer of P ≦ N), and P = 7 is selected here. By the feeding of P, the printing portion of the second time is printed on a line which does not overlap with the dot line printed in the first time. Similarly, T = 3 and T = 4 are fed by P dots and then printing scanning is performed. A single stroke is completed by these four scans, and the missing print dot line disappears from the center portion in the sub-scanning direction, and the next stroke is entered to successively fill the missing print dot line. The number of P dot feeds is (K
-1) times, which is 3 times in this embodiment. In the next feed, the feed amount S is fed so as to reach the next dot line. The value of S is S = N × K− (N−1) × P (1), and thus S = 4 × 15−3 × 7 = 39 dots in this embodiment. After performing this S feed once, P feed again (K-
1) Repeat once. In summary, in the interlaced drive of the present invention, after repeating P dot sub-scan feed K-1 times,
S-dot sub-scan feed is performed once.

However, K / N and K / P are irreducible fractions, P is a positive integer value P ≦ N, and S is S = N × K- (N-1) × P.

To describe the conventional example and the present invention from this relational expression, the case of P = 1 is the above-mentioned 1-dot line sub-scan feed interlace drive method, and the case of P = N is the equal-interval sub-scan feed interlace drive. Is the law. It becomes effective by combining the interlace driving method including the conventional driving method and the conditions described later. These recording operations are performed by giving an operation instruction from the CPU or the like by the control unit 205 shown in FIG.

This monochromatic operation has been described for the case of one column in the sub-scanning direction. However, even in the case of a plurality of monochromatic columns as shown in 4-B of FIG. When the value is defined, it can be handled in the same manner as a unit recording element group having one column in the main scanning direction.

The invalid recording area B in monochrome is B = (K-1) .times. (P-1) (2), which is 18 dot lines. In the same condition, evenly spaced sub-scan feed interlace drive P = N = 18,
Since it is B = 42 dot lines, it is reduced. For the sub-scan feed line, P = 7 and S = 3
9 and P for S is slightly less than 6 times, while 1 for
Dot line sub-scan feed feed P for interlace drive
= 1 and S = 47, P for S becomes 47 times. As a result, variations in the feed amount during feeding are reduced.

Here, as described above, the interval between the columns in the main scanning direction can be freely set, and the alignment process for recording the dots required at the time of recording is performed by the processing means 204 of FIG. It is set by the selected address from 203.

Next, the case of color printing will be described.
When in color, the whole of FIG.
The recording element group is composed of the number of nozzles N = 15, the nozzle pitch K = 4, and the nozzle spacing H = 7 of each color for the colors M1, M2, M3, and M4. Basically, the driving of M1 is configured with each color shifted by H = 7 dots, and the idea is the same as in the case of a single color. The invalid area C in color is C = (K−1) × (P + H−1) (3) in the superposition of four colors, and C = 39 dot lines are reduced (equal-interval sub-scan feed interlace). In the driving example, C = 87). here,
The deviation amount H of the nozzle arrangement of the color recording element is not specified. Generally, when the value of H is 0, the arrangement is parallel to the main scanning direction, and in that case, simultaneous recording is performed at the same position of each color, which is disadvantageous in terms of color mixing effect. H = 1
In the case of, it is advantageous that simultaneous recording on a simultaneous line does not occur on the color mixing surface, but since the positions of the nozzle ends in the sub-scanning direction are close to each other, it may occur due to some error in feeding accuracy. The shift becomes easy to see. Therefore, it is desirable that the selection of the value of H be large to some extent. H = P
When = N is selected, it corresponds to the interlace drive with equal-interval sub-scan feed of the conventional example.

Regarding the method of selecting P, the range of positive integers such that P ≦ N is specified when the conventional example is not used. However, when the value of N approaches, the values of P and S approach and the feed accuracy It is useful for improving, but invalid range B = (K−1) × (P−
1) becomes large. Further, when P approaches 1, the opposite relationship occurs. Therefore, P is selected based on various conditions of printer components such as the length in the sub-scanning direction of the head, mechanical precision variations, and the capacity of the buffer memory for storing data. In this case, P = N or 1 of the conventional example is also included.

FIG. 6 is an explanatory view of the embodiment of the present patent, showing an example of correspondence between dots to be recorded and pixel data stored in the buffer memory 203. The figure on the left side is the pixel information to be recorded, and each mask shows one pixel data. The figure on the right shows the recorded dots corresponding to that pixel. In the case of recording 601 pixels, one mask is composed of dots as shown in the examples of 651, 652, 653, and 654. Generally, if 601 is binary data, the output is recorded as 1-dot binary data.
In the present invention, one pixel is composed of a plurality of dots. The configuration of a plurality of dots is selected based on conditions such as dot size, shape, and recording speed. By using the interlace drive method described above, the dot width in the sub-scanning direction can be set not by the head dot width but by the sub-scanning drive condition. Since it can be set, the rationalization of multiple recording dots in this patent is created. Further, the dot size can be set to be smaller than the conventional one-pixel one-dot configuration by making the dots plural.

FIG. 7 shows a concrete example of the processing means 204 of the patented components. Reference numeral 701 is original data of an image to be recorded, 702 is a pattern matching table for correction, 703 is comparison processing means, and 704 is output data. The final recording dot is not determined by the input data itself, but new data is generated by calculation or table conversion from data around the recording data. That is, in this embodiment, the correction pattern 70 in which the 9-pixel data 701 that is the entire periphery of one dot is stored in advance.
2, the optimum table is selected and the comparison processing means 7 is selected.
Then, the output data 704 is obtained.

FIG. 8 illustrates the processing means 204. The data 801 taken out from the buffer memory 203 is compared by the selection data extracting means 802, compared with the pattern matching means 803, the output data is generated by the correction data generating means 804, and the recording data rearranging means 805 is used. Sort according to the order of recording elements,
Alternatively, it is selected, output as output data 806, and transferred to a latch circuit or the like of the recording element group.

FIG. 9 is an explanatory diagram of the embodiment and shows the arrangement of the processing result of the output data. The numbers H and V are the numbers of the dots at the time of recording being numbered in the arrangement order. First, the configuration of one pixel is an example of the two-dot configuration shown by 651 in FIG. 6, and its arrangement is shown by 901. When the circular dots shown in the figure exist as the processing output, and when K = 4 printing as shown in FIG. 4A is performed at the time of printing, in this example, the dots are arranged to be shifted by half a dot in the main scanning direction. Further, since the output recording dots are composed of two dots, the simultaneous recording at the time of recording is performed by giving the data for every one dot in the sub-scan shown by the hatched circle in the drawing to the recording element. When viewed in the sub-scanning direction, it means that data is generated at 2-dot intervals. This data generation can be generated sequentially and stored, or can be generated each time necessary data is generated, and is selected depending on the processing time and the margin of memory.

FIG. 10 shows an example of the processing order in the case of the dot configuration of FIG. The reference pixel is a data generation method adapted to output required data in the case of having a processing unit for outputting 1 dot by referring to 9 pixels. The left side is the original data and the right side is the generated data, and the arrangement of the recording results is arranged in the order of vertical V and horizontal H. The details will be described.

Two dots corresponding to one central pixel are generated from the nine pixels in the diagonally shaded block on the left by table matching processing such as table comparison. That is, the output is H
002, V002 position H data or L data is generated. Next, the input 9-pixel block is moved by 2 pixels in the sub-scanning direction, the same processing is performed, and the output H002, V00
4 H data or L data is generated. In the same manner, the same number of processes as the number of simultaneous recording nozzles are performed, and one generation of recording data is performed. After the data is collected once, the same process is performed in the main scanning direction, and the data process for one main scanning line is performed. After the one-line main scanning process is completed, the feeding in the sub-scanning direction is performed. The position corresponding to the feed amount is selected by the address of the memory, and the same processing is performed again. In the dot generation processing shown in this embodiment, recording dots are generated and transferred to the latch circuit of the recording element group, etc., so that a memory for rearranging is unnecessary, but the sub-scanning direction processing cannot be performed continuously. Therefore, the number of processing times increases. It can be determined by the time margin and the memory margin.

FIG. 11 shows an example of a comparison pattern when 1 dot is generated from 9 pixels. With this correction pattern, it is possible to make a correction that is strong against variations in the elements of the printing apparatus. In the example of this pattern, the dot corresponding to the central pixel is generated from the nine pixels shown in FIG. 7. In this example, one pixel corresponds to two dots. Generate 3 dots,
The final dot is determined by OR processing or AND processing of a plurality of results. The left side of the figure is the reference pixel, and the right side is the generated dot. 11A to 11E are shown as examples of the reference pixels, and the respective reference patterns correspond to the recording and non-recording of the central 3 dots. The pattern shown in this figure is an example of the contents of the pattern matching table 703 in FIG. 7.

FIG. 12 shows the corrected recording result output in the pattern example shown in FIG. 11 and the standard recording recorded without correction.
Regarding the characteristics of the original recorded raw data,
12A to 12D are shown. In standard printing when one pixel corresponds to two dots, black and white one-line recording 12B cannot separate lines, but correction recording enables separation. In the black and white 2-line recording 12C, the thickness of black and white can be corrected by the correction. This example includes a case in which even the details of the thickness correction cannot be faithfully expressed due to the way the pattern of FIG. 10 is adopted. However, in terms of practical use, it does not matter because of the visual acuity determination. 11D is an example in which one black line and one white line are continuously arranged, and reproducibility faithful to visual acuity is expected by correction recording.

FIG. 13 shows variations in the line in the sub-scanning direction in the corrected recording result in the embodiment of FIG. The line shown in the variation recording result shows the amount of deviation in the sub-scanning direction. Although the tolerance varies depending on the size of the output dot, the expressiveness does not change even when the amount of deviation is large as compared with FIG. 16, indicating that the variation is strong.

In this embodiment, the reference pixel for correction has been described as 9 pixels, but its size can be freely set because it depends on the requirements of the apparatus. Further, regarding the constituent dots of the recording, the output of two dots has been described, but it is effective if it is a plurality of dots as shown in FIG. Also, various values can be selected for the interlace drive head condition, feed condition, and the like.

[0049]

As described above, according to the present invention, K / K interval is set and K / N is set in the recording element group of N nozzles.
N is a irreducible fraction, a positive integer value of P ≦ N, S = N × K−
An interlace drive method in which a process of repeating P dot sub-scan feed (K-1) times and S dot sub-scan feed having a condition of (N-1) x P is repeated once, and recording output dots are input to an input pixel. Since it is configured by using a plurality of dots and adding a correction process to the output dots, the effect of interlace driving, that is, the demand for fine head processing can be reduced, and the effect of making one pixel a plurality of dots. That is, even though the size of one dot is small, white spots such as blurring can be suppressed, at the same time, smooth expression can be performed, and the effect of the output dot correction processing, that is, the expression power for mechanical variation is not reduced. This effect can be achieved at a much higher level than the single effect, and the recording quality can be improved without increasing the overall price. Rukoto can.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of an embodiment of the present invention.

FIG. 2 is a diagram of an embodiment of the present invention.

FIG. 3 is a diagram of a configuration according to an embodiment of the present invention.

FIG. 4 is an explanatory diagram of one configuration according to the embodiment of the present invention.

FIG. 5 is a diagram of an embodiment of the present invention.

FIG. 6 is an explanatory diagram of an example of the present invention.

FIG. 7 is an explanatory diagram of an example of the present invention.

FIG. 8 is an embodiment of one constitution of the present invention.

FIG. 9 is an explanatory diagram of an example of the present invention.

FIG. 10 is an explanatory diagram of an example of the present invention.

FIG. 11 is an explanatory diagram of an example of the present invention.

FIG. 12 is an explanatory diagram of an example of the present invention.

FIG. 13 is an explanatory diagram of an example of the present invention.

FIG. 14 is a diagram of a conventional example.

FIG. 15 is an explanatory diagram of a conventional example.

FIG. 16 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 203 buffer memory 204 processing means 205 control means 206 recording element group 301 recording nozzle

Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI Technical display location B41J 2/485 H04N 1/034 8721-5C 8306-2C B41J 3/04 101 A 8703-2C 3/12 G

Claims (2)

[Claims] 1. A recording material of a recording apparatus for recording based on image or character information data and a head having a recording element group are arranged at substantially right angles, and the head is moved by main scanning and the head is moved by sub scanning. In a recording apparatus for forming an image by moving a recording material, a single unit recording element group configured by having N recording elements at K dot intervals in the sub-scanning direction,
Alternatively, a plurality of recording element groups prepared, a buffer memory for storing the information data as image data, and image data matching the arrangement of the recording element groups are selected from the buffer memory and supplied to the recording element group. And a control means necessary for controlling the main scanning and the sub-scanning operations, and a processing means for generating the correction data for recording based on the peripheral image data when selecting the image data. The processing means processes the plurality of dots corresponding to one of the image data, and the control means performs a recording operation for each main scan of a row of the plurality of recording element groups. A recording apparatus characterized by repeating (K-1) times of feeding in the sub-scanning direction for P dot intervals and then repeating once for S dots interval of sub-scanning feed. However, the following conditions are satisfied. In K and N, K / N is an irreducible fraction. In K and P, K / P is an irreducible fraction (a positive integer P ≦ N) and S is S = K × N− (K−1) × P dots. 2. The recording apparatus according to claim 1, wherein the values of K and P are such that K / P is an irreducible fraction (a positive integer such that P <N and P ≠ 1).