JPH0635191B2 - Recording device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a recording device, and more particularly to a recording device including a read head in which a plurality of reading elements are arranged.

[Prior Art] For example, in a recording apparatus provided with a reading head in which a plurality of reading elements are arranged in a vertical row, an image read by scanning a document with a reading head in a plane is converted into an electric signal, and a plurality of the same are read. Sent to the recording head side where the recording elements of
We are recording.

In such an apparatus, the recording head is moved in a fixed direction, and when reading for one scanning is completed, the recording head is stepwise fed in a direction perpendicular to the moving direction up to now.

When recording is performed with such a recording device, it is difficult to perform stepwise feeding with high accuracy, and adjacent dots overlap or separate between the recording range corresponding to the part read by the previous scan and the part of the next recording range. Will end up.

As a result, black streaks and white streaks occur in the recorded image.

Even if adjustment is performed at the beginning of recording so as not to cause such an inconvenience, the adjustment is lost due to the deviation of the recording paper and the like, and a high-quality image cannot be obtained.

Such a state is shown in FIG. In FIG. 1, the white circles indicate the previously recorded state, and the black circles indicate the later recorded state. As is clear from FIG. 1, if there is a gap between the previously recorded portion and the currently recorded portion when the recording head steps forward, white streaks become linear and continuous, and the image quality is remarkably improved. It will result in damage.

[Object] The present invention has been made in order to eliminate the above-mentioned conventional defects, and a recording apparatus configured to perform high-quality image recording without generation of white lines or black lines. Is intended to provide.

[Examples] Hereinafter, details of the present invention will be described based on Examples shown in the drawings.

FIG. 2 and the following figures are for explaining one embodiment of the present invention.
FIGS. 2A and 2B are diagrams for explaining a schematic configuration of a recording apparatus to which the present invention is applied, and FIG. 2A is an apparatus for performing recording by scanning a recording head on a recording paper in x and y directions. FIG. 2B shows an example of a recording device that feeds recording paper instead of advancing the recording head stepwise.

In principle, the apparatus of the present invention can be applied to both structures. However, in the following description, a structure having a recording paper fixed as shown in FIG. 2 (A) will be described as an example.

In FIGS. 2A and 2B, the same parts or corresponding parts are designated by the same reference numerals.

In FIG. 2 (A), reference numeral 1 denotes a recording paper, and a carriage 4 on which a recording head having 128 nozzle arrays 4a shown as an example of a recording element is mounted is arranged along the guide rail 2 above the recording paper. It is arranged so that it can slide in the x direction.

The movement of the carriage 4 is performed by an endless wire 3a run by the motor 3.

The guide rail 2 travels in the y direction along a guide rail 5 arranged orthogonally thereto, but the travel is performed via an endless wire 7 driven by a motor 9.

Under such a structure, after the recording area 6 is obtained by one scanning in the x direction, the recording area 6 is stepped in the y direction and the next scanning is performed.

By repeating such scanning, recording is performed by dots within the target range of the recording paper 1.

In the case of the recording apparatus shown in FIG. 2 (B), recording is performed in exactly the same manner except that the recording paper 1 is fed instead of stepwise feeding of recording dots.

When performing color recording, a nozzle array 4a consisting of 128 nozzles is arranged in parallel for four sets of four colors of yellow, magenta, cyan and black, and recording is performed by scanning the fixed recording paper 1 in x and y. Done.

Then, in the case of performing multiplex recording in which each color is overlapped, recording is performed by an independent complementary uneven pattern for each color so that the seam portion is not conspicuous at the seam portion of the previous recording area and the next recording area.

In order to simplify the description, an example of the case of performing such recording will be described by taking the case of recording in a single color as an example.

FIG. 3 is a diagram for explaining the outline of the driving method of the apparatus of the present invention, in which the nozzle array 4 having the array length b is scanned on the recording paper 1 in the x direction, stepwisely fed in the y direction, stopped, and then again x. Direction scan.

The step-wise feed distance c is made shorter than the nozzle length b in accordance with the degree of unevenness of the joint.

In this embodiment, the step-feeding distance c is shorter than the nozzle array length b by 2 dots in order to form the unevenness of 2 dots.

When scanning is performed using all the dots as it is and the stepwise feeding is performed, the shaded portions are overlapped and recorded as indicated by reference numeral 13 in FIG.

Therefore, if recording is performed by selecting each dot so that such overlap does not occur in the front and rear recording areas, complementary recording of the seam portion as shown in FIG. 4 can be performed.

That is, in FIG. 4, at the joint portion of the first scan and the second scan, 1
A selection drive signal is given to the nozzles so that the printing of the second scan and the printing of the second scan are complementary.

FIG. 6 shows a control circuit diagram of such selective driving.

That is, the input data is ANDed with the inverted output of the selective drive ROM 60 to determine whether or not to use it as output data.

The input data continues from 1st to 1st to 1st to 128th dots in the n-th row, one scan is performed, and then the step data is advanced to 2
The scan lines are arranged so as to have 1 to 128 dots in the 1st to nth rows. This data is also stored in the selective drive ROM as shown in FIGS. 7 (A) and 7 (B).

In FIGS. 7A and 7B, when the data value is "1", it is not output, and when it is "0", it is output.

The ROM address value is a counter value that is incremented each time one dot is advanced.

FIG. 7 (A) defines the output stop dot for the first scan,
FIG. 6B defines the output stop dot for the next scan.

That is, in FIG. 7 (A), output stop dots are defined at 127th and 128th dots, and this portion is used as a concave-convex recording pattern.

In the next scan, the selective driving is performed so that only the two dots which were not printed in the first scan are printed.

By such a processing, a recorded image as shown in FIG. 4 in which the seam portion is complemented by 2 dots is obtained.

By the way, in the driving method described above, it is determined whether or not to output all the dots of 1 to 128 dots.
Since selective driving is required only for the two overlapping dots in the seam portion, output stop dots of only two dots in this portion may be determined.

A circuit configuration in this case is shown in FIG.
The contents of the above are shown in FIGS. 9 (A) to 9 (C).

That is, a clock of 1 and 2 dots and a clock of 127 and 128 dots are input to the counter and the
The dot 1 is associated with the ROM address 1, the second dot is associated with the address 2, the 127 dot is associated with the address 3, and the 128 dot is associated with the address 4, and the data for determining the output stop dot is output as 1, 2 and 127. , 128 dots data output is stopped.

FIG. 9A shows a data value used for the selective drive of the first scan, where "0" is the output and "1" is the output stop.

Then, one scan has a pattern for 16 columns, and when one pattern is completed, a refresh signal is input, and this pattern is repeated to obtain an uneven pattern.

Further, FIG. 9B shows the contents of the selective drive ROM of the second scan, the high address contains the counter value of the number of scans, and the low address is 1, 2, 127, 12
It is incremented every time the eighth dot comes.

What should be noted here is that in the overlapping area of the seam portion, "0" in the previous scan was "1", and "1" in the previous scan.
The point was that this time it should be "0".

127th, 128th dot of the second scan and 1, 2 of the 3rd scan
Regarding the dots, the 1st dot is "1" for the 127th dot "0" column, the "0" for the 1st dot, and the 2nd dot for the 128th "0" column at the corresponding address. Data is input in the ROM so that the columns of "1" and "1" are "0".

Even if such a processing method is adopted, a recorded image as shown in FIG. 4 can be obtained.

By the way, FIG. 5 shows a state in which, when recording is performed by the apparatus of the present invention, even if the seams of the front and rear recording areas are deviated, they are inconspicuous.

That is, when complementary recording is not performed, white stripes are linearly continuous on the joint as shown in FIG. 1, which is conspicuous, but when the apparatus of the present invention is used, the gap diffuses as a separated point. Therefore, white streaks are less noticeable.

In the above-described embodiment, the processing is performed using a large capacity memory, but the present invention is also applied to a reading / recording apparatus that requires almost no buffer memory.

FIG. 10 shows an example of this, and in this apparatus, an original image (not shown) is read by the reading element 1 via the imaging lens 12.
An image is read by forming an image on No. 3, and a read signal is sent to a recording element 20 having the same number of recording elements as the reading element 13 to perform recording.

The imaging lens 12 and the reading element 13 are provided inside the carriage 11, and the carriage 11 performs scanning while moving along the guide rail 16 in the x direction, and when one scanning is completed, the carriage 11 indicates both ends of the guide rail 16. The carriage 14 is stepped on the guide rail 17 in the y direction via the carriage 14.

Further, the reading element 20 also scans in the x direction along the guide rails 22 via the carriage 21 for recording, and at the same time, a carriage 23 supporting both ends of the guide rails 22.
Is stepped forward on the guide rail 24 in the y direction via.

In such an apparatus, the read image information is immediately sent to the recording element side as recording information and the nozzle array or the like can be driven to perform recording, and a buffer memory is hardly required.

Even in such an apparatus, it is possible to obtain a recorded image as shown in FIG. 4 in which the seams are complementary to each other by redundantly reading the images during reading and selectively driving the reading elements during recording.

[Effect] As is apparent from the above description, according to the present invention, when recording is performed using the recording head having a plurality of recording elements, the previous recording range and the next recording range are overlapped and the overlapping portion is not overlapped. Since it is configured so that it can be recorded complementarily between the previous time and the next time, dots are distributed and recorded at the recording boundary between the previous time and the next time, so there is no white or black stripes at the boundary portion. The recording quality can be greatly improved.

[Brief description of drawings]

FIG. 1 is an explanatory view of a recording state by a conventional apparatus, and FIG. 2 and the following figures are for explaining one embodiment of the present invention.
(B) is a perspective view showing an example of different recording apparatuses to which the present invention is applied, FIG. 3 is an explanatory view of an overlapping recording area, FIG. 4 is an explanatory view showing complementary recording areas, and FIG. 6 is an explanatory view of a complementary recording state, FIG. 6 is a block diagram of a selection drive circuit, FIGS. 7A and 7B are tables showing the contents of the selection drive ROM, and FIG. 8 is another drive method. A block diagram of a selective drive circuit used, FIGS. 9A to 9C are table diagrams showing the contents of a selective drive ROM when the circuit shown in FIG. 8 is used, and FIG. FIG. 11 is a perspective view of another recording apparatus that is used. 1 ... Recording paper, 2, 5 ... Guide rails 3, 9 ... Motor, 4 ... Carriage 4a ... Nozzle array, 6 ... Recording area 60 ... Selective drive ROM

Continuation of front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical display location G06F 3/12 H H04N 1/23 Z 9186-5C 8703-2C B41J 3/12 C 8703-2C L

Claims (2)

[Claims] 1. A recording head having a plurality of recording elements forming dots is relatively scanned with respect to a recording medium, and after the recording by one scanning is completed, the recording medium is relatively moved with respect to the recording head in a direction orthogonal to the relative scanning direction. In a printing apparatus for sending and connecting printing areas to perform printing, a previous printing area and a next printing area by the relative scanning are overlapped by at least one dot, and the overlapping area is selectively printed by a conversion table. A recording apparatus characterized in that the recording states of the previous scanning and the next scanning are complementary. 2. The recording apparatus according to claim 1, wherein the recording head is a nozzle array.