KR101721476B1 - Vector printing system for printed electronics - Google Patents

Abstract

A vector printing system according to an embodiment of the present invention includes: a discharge head for discharging ink; An object on which a printing pattern is printed by the ejection head; A discharge actuator for moving the discharge head or the discharge object; A first encoder for sensing a movement distance of the ejection head or the object in the X axis direction; A second encoder for sensing a movement distance of the ejection head or the object in the Y-axis direction or a movement distance of the object in the Y-axis direction; And an encoder processing unit for counting the signals of the first and second encoders and controlling whether the ejection head is ejected or not, wherein the encoder processing unit uses encoder signals of two or more axes, Can be generated.

Description

Vector printing system for printed electronics

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vector printing system, and more particularly, to a printing electronic vector printing system capable of preventing ink from being accumulated in a region where a head is accelerated or decelerated during high speed vector printing.

With the development of inkjet (Inkjet) technology, application range from office to electronic parts and display manufacturing has been expanded. Unlike office inkjet machines, it is necessary to precisely control the size of an ink drop and to precisely eject ink droplets at a desired position with accuracy within a few micrometers . Unlike conventional semiconductor processes, such inkjet technology can be processed without wasting expensive materials and can be easily enlarged. Therefore, researches are actively being made to apply inkjet to a mass production process, particularly in the field of electronic printing.

In addition, as the application range of the inkjet technology becomes wider as the display is manufactured, there is an increasing need to pattern and discharge an accurate amount of ink at an accurate position. Therefore, it is necessary to use a file such as CAD to accurately print a pattern. The printing method using CAD includes a raster printing method of converting a CAD drawing into a bitmap image and printing, and a raster printing method of converting a CAD drawing into a bitmap image (bitmap image) and a stage (a dxf file, a Drawing Exchange file Format file) stage printing is carried out. A Dxf file is an ASCII file. It is a file format widely used for exchanging drawings between various CADs. It is a file having all drawing information such as dimensions and line types of drawings.

On the other hand, raster printing is more suitable for a discharge head having a multi-nozzle, which is suitable for printing a more complicated image in such a manner that the discharge head prints only in the main direction and moves only in the sub direction. Contrary to raster printing method, vector printing method is suitable for printing when two axes move simultaneously and the number of nozzles is small. It is also an effective and superior method for printing relatively simple images such as oblique lines, circles, arcs or shapes rather than complex images.

However, in the case of the vector printing, the printing speed is too slow or the ink is gathered at the end, so it is not easy to perform high-speed and high-quality vector printing. There is also a method of printing using a trigger signal after the head stops at the discharge position in order to prevent the ink from collecting at the end. This method has a limitation that the printing speed is very slow.

Accordingly, there is a growing need for a technique for preventing high-quality vector printing, which prevents the ink from being clustered at the end when performing high-speed vector printing.

The applicant of the present invention has proposed the present invention to solve the problems of the related art as described above, and references related to the related art are Korean Patent Application No. 10-2012-0119430 entitled "Vector Printing Method of Electronic Printing System Using CAD Drawing "There is.

The present invention provides a vector printing system capable of performing vector printing at a high speed and preventing ink from collecting at a point where the speed of the head changes.

The present invention provides a vector printing system in which the jetting characteristics are not changed according to the ejection frequency even if ink is ejected at regular intervals.

The present invention provides a vector printing system capable of realizing high quality printing even if vector printing is performed at high speed.

According to an aspect of the present invention, there is provided a vector printing system including: a discharge head for discharging ink; An object on which a printing pattern is printed by the ejection head; A discharge actuator for moving the discharge head or the discharge object; A first encoder for sensing a movement distance of the ejection head or the object in the X axis direction; A second encoder for sensing a movement distance of the ejection head or the object in the Y-axis direction; And an encoder processing unit for counting signals of the first and second encoders and controlling whether the ejection head is ejected or not, wherein the encoder processing unit is configured to receive encoder signals from the first and second encoders First and second encoder signal receiving units; A first encoder counter and a second encoder counter for counting the encoder signals received by the first and second encoder signal receivers, respectively; A movement distance determination unit for obtaining a movement distance of the ejection head based on a count value of the first and second encoder counters; An ejection trigger generating unit for generating an ejection trigger when the movement distance of the ejection head obtained by the movement distance determination unit is equal to the ejection interval; And an ejection trigger control unit for determining whether the ejection trigger generated by the ejection trigger generation unit is output, and can generate an ejection trigger for every predetermined vector ejection interval using encoder signals of two or more axes.

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Wherein the movement distance determination unit determines whether or not the encoder position value obtained in the first and second encoder counters is equal to the ejection interval and controls the ejection trigger so that the ejection trigger is generated only when the ejection head moves by the ejection interval. The determination result can be transmitted to the generation unit.

The ejection trigger control section may output the ejection trigger only when the ejection head moves at a constant speed so that ink is ejected from the ejection head.

When the ejection head is moved at a constant speed, the ejection trigger is output through the ejection trigger output unit and transmitted to the ejection head. When the ejection head is accelerated or decelerated, the ejection trigger is set to a dummy period And is not transmitted from the encoder processing unit to the ejection trigger output unit.

The encoder processing unit can be operated only when the discharge head is moving at a constant speed.

The ejection trigger generator may generate one ejection trigger for each ejection interval.

The sum of a section in which the discharge head moves at a constant speed and a section in which the discharge head moves in acceleration or deceleration may be longer than a length of the printing pattern.

The printing electron vector printing system according to the present invention can speed up vector printing and prevent ink from being collected even at a point where the speed of the head changes. The vector printing system according to the related art often discharges at the same frequency in the discharge section. In this case, the printing speed is reduced in the acceleration / deceleration section, and the discharge interval is narrowed. Therefore, the end portion of the printing section is agglomerated, so that a desired quality can not be obtained. In the present invention, such disadvantages can be overcome. In addition, the method of moving and stopping printing by the ejection interval to solve end clustering may be unsuitable for actual production because the printing speed is too slow. Since the present invention can print while moving the printing section at a constant speed, can do.

It is possible to perform equal-interval ejection by using ejection trigger every equal interval in vector motion. However, there is a case where the discharge frequency is changed in the acceleration / deceleration section and the constant velocity section in equidistant discharging. The printing electron vector printing system according to the present invention can prevent the ink discharge amount from being changed according to the size of the discharge frequency since the ink is discharged only in the constant velocity section in which the discharge frequency is constant .

The vector printing system according to the present invention can print at a high speed without changing the ejection frequency even if ink is ejected at regular intervals, so that a high-quality printing result can be obtained.

The vector printing system according to the present invention can be applied not only to a general inkjet but also to an electrohydraulic ink jet technology (EHD) and a dispenser for jetting ink using a trigger signal.

1 and 2 are schematic views of a vector printing system according to the present invention.
3 is a diagram illustrating the configuration of a vector printing system according to the present invention.
4 is a diagram showing a configuration of an encoder processing unit according to FIG.
FIG. 5 is a diagram showing a moving interval and a moving speed when the vector printing system according to the present invention is applied.
6 is a flowchart illustrating a printing method using a vector printing system according to the present invention.
7 is a diagram illustrating a software screen for operation of the encoder processing unit in the vector printing system according to the present invention.
8 and 9 are views illustrating printing patterns to which a vector printing system and a printing method according to the present invention can be applied.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to or limited by the embodiments. Like reference symbols in the drawings denote like elements.

FIG. 3 is a diagram showing the configuration of a vector printing system according to the present invention. FIG. 4 is a diagram showing the configuration of the encoder processing unit according to FIG. 6 is a flowchart illustrating a printing method using a vector printing system according to the present invention. FIG. 7 is a flowchart illustrating a printing method using a vector printing system according to an embodiment of the present invention. FIGS. 8 and 9 are views illustrating a printing pattern to which a vector printing system and a printing method according to the present invention can be applied. FIG. to be.

Referring to FIGS. 1 to 4, a vector printing system 100 according to an embodiment of the present invention includes: a discharge head 110 for discharging ink; A head driving part 130 for moving the discharging head 110, a discharging part 120 for printing a printing pattern by the discharging head 110, a discharging part 140 for moving the discharging part 120; A first encoder 150 for sensing a movement distance of the ejection head 110 or the object 120 in the X axis direction; A second encoder 160 for sensing a movement distance of the ejection head 110 or the object 120 in the Y-axis direction; And an encoder processing unit 170 for counting signals of the first and second encoders 150 and 160 and controlling whether the discharge head 110 is discharged or not. In this case, according to the XY stage construction method, the object 120 moves in both the X-axis direction and the Y-axis direction, or the object 120 is fixed and the discharge head 110 moves in both the X- And may include a system configured to move.

In some cases, only one of the head driving unit 130 and the pitot drain driving unit 140 may be provided to move both the discharging head 110 and the pit 120.

The vector printing system 100 according to the present invention can be applied not only to a general inkjet but also to a dispenser for jetting ink using an electrohydraulic inkjet or a trigger signal.

The vector printing system 100 according to the present invention is a vector printing system capable of simultaneously printing and moving the discharge head 110 having at least one nozzle to the designated coordinates (i.e., the point at which ink is to be discharged) in the XY direction. At this time, the necessary position information to be moved to the designated coordinates can be obtained by using the information of the CAD drawing or by using an observation camera (not shown) or the like to obtain the XY coordinate information of the position at which ink is to be ejected. The movement path of the discharge head 110 can be designated as a straight line or a curved path.

The ink jet and electrohydraulic ink jet or the like ejects by using each trigger signal for each ink ejection position, and the same applies to the printing system 100 according to the present invention.

The vector printing system 100 according to the present invention can generate an ejection trigger every predetermined ejection interval by counting encoder signals in an encoder processing unit (EPU) 170. [ The encoder processing unit 170 can generate an ejection trigger every predetermined vector ejection interval using encoder signals of two or more axes.

Since the vector printing system 100 according to the present invention performs vector printing, the ejection head 110 or the object 120 (i.e., the substrate) must be simultaneously moved in the X-axis and Y-axis directions. The X stage 130 moves the ejection head 110 in the X axis direction and the Y stage 140 moves the object 120 in the Y axis direction Direction. In some cases, the Y stage 140 may not move the object 120 but may move the ejection head 110.

In addition, depending on the configuration of the stage, the discharge head 120 may be fixed to the discharge head 110 and the XY stage moving part may be fixed to the discharge object 120, or the head 110 may be fixed.

An encoder is used to sense the travel distance of the X and Y stages 130 and 140 and an encoder signal (encoder pulse) generated in the encoder can be used in the encoder processing unit 170 to output a trigger signal 190. The encoder processing unit 170 may be connected to a separate computer 200 or the like and its operation may be controlled.

When the encoder processing unit 170 is turned on and off and the encoder signal is counted according to the driving of the X and Y stages 130 and 140 and the ejection trigger is transmitted to the head driver 115, The ink can be ejected from the nozzle 117 of the ink jet recording head. The X and Y stages may be the head driving unit 130 and the pit body driving unit 140, respectively.

3, the head driving unit 130 for moving the discharging head 110 can move the discharging head 110 in the X-axis direction or the Y-axis direction on the object 120. FIG. Also, the phyto-discharge driving part 140 can move the object 120 in the X-axis direction or the Y-axis direction.

The first and second encoders 150 and 160 may be provided to detect the distance of movement of the head 110 or the object 120 by the head driving unit 130 or the object driving unit 140. The first encoder 150 senses the movement distance of the ejection head 110 in the X axis direction and the second encoder 160 senses the movement distance of the ejection head 110 in the Y axis direction or the Y axis direction The moving distance can be sensed.

When the discharge head 110 or the object 120 moves in two dimensions, a two-axis encoder having two encoders is sufficient. However, when moving in three dimensions, a multi-axis encoder is used for three axes with three encoders or more .

The encoder processing unit 170 may count the encoder signals (or encoder pulses) of the first and second encoders 150 and 160 to control whether the ejection head 110 is ejected or not. That is, the encoder processing unit 170 can determine the distance traveled by the discharge head 110 using the counted value of the encoder signal, and determine whether the discharge trigger is output. The encoder processing unit 170 may be connected to the ejection trigger output unit 190 to determine whether or not the ejection trigger is output.

4, the encoder processing unit 170 includes first and second encoder signal receivers 171 and 172 that respectively receive encoder signals from the first and second encoders 150 and 160, first and second encoders 150 and 160, The moving distance of the discharging head 110 is obtained based on the count values of the first and second encoder counters 173 and 174 and the first and second encoder counters 173 and 174 counting the encoder signals received by the signal receiving units 171 and 172, A discharge trigger generating section 176 for generating a discharge trigger when the travel distance of the discharge head 110 obtained by the travel distance determining section 175 is equal to the constant discharge interval, And an ejection trigger control unit 177 for determining whether the ejection trigger generated in the generation unit 176 is output.

The encoder processing unit 170 compares the ejection interval of the ejection head 110 that is known in advance, the length of the printing pattern to be printed, the speed of the ejection head 110, and the XY stage encoder signal count value, A discharge trigger is generated for each discharge interval of the discharge trigger 110, and whether or not the generated discharge trigger is output is determined. The difference between the conventional raster printing method and the vector printing method according to the present invention is that the discharge signal is not generated using only a single axis encoder but a single discharge trigger is made using vector lengths of two or more axes. In other words, there is a major difference in that when vector printing using two or more stages of stages, one vector ejection trigger is outputted in the printing section using the encoder of each axis.

In addition, the encoder processing unit 170 can designate the output ON / OFF of the ejection trigger by software so as to separate the printing pattern for ejecting the ink and the stage motion for movement of the head 110 without ejecting the ink. The count value of the first and second encoder counters 173 and 174 can be used to be discharged at a specified distance. In this manner, the discharge trigger can be generated every designated discharge interval by designating the distance, that is, the discharge interval.

As mentioned above, unlike the raster printing method, vector printing moves simultaneously in the XY-axis direction, so that it is difficult to print at a constant interval with the encoder signal of one axis. Therefore, there is a need for an encoder processing unit 170 that causes an ejection trigger to be generated for each constant length (i.e., ejection interval) from two axes or multiple encoders. The encoder processing unit 170 can cause one trigger pulse for ejection to occur every designated ejection interval based on two or more encoder signals.

If a discharge trigger occurs at the same interval, a low frequency appears in the acceleration section and the deceleration section. In the low section and the high section, the discharge frequency exists from the low frequency to the high frequency in proportion to the speed. In inkjet or electrohydraulic inkjet (EHD), the ejection frequency is closely related to the ejection amount of the ink. For example, even when discharging is performed at a constant discharge interval, the discharge frequency becomes small in the deceleration section, so that the discharge quantity can be reduced or increased. Particularly, in the case of the electrohydraulic ink jet (EHD), the discharge amount may vary greatly depending on the discharge frequency. Therefore, in order to perform uniform printing, the discharge frequency must be uniformly discharged in the discharge region.

In addition, since the ejection is performed at the same frequency in the section where the ejection head 11 moves at a constant speed, the ejection amount is constant and uniform pattern printing is possible. Accordingly, a system and method for printing a printing pattern only in a constant speed section is required, and in the present invention, the encoder processing unit 170 can perform this function.

5 (a) shows the length of the printing pattern (a section between (x1, y1) and (x2, y2)) and a section between the entire movement section (x1 ', y1' And FIG. 5B shows the moving speed of the discharging head 110 with respect to the entire moving section of the discharging head 110. As shown in FIG.

As shown in FIG. 5 (b), the discharge head 110 moves over the acceleration section, the constant velocity section and the deceleration section, but discharges the ink only in the constant velocity section. Referring to FIG. 5A, the printing pattern to which the ink is to be discharged, that is, the printing section is in the constant velocity section, and the dummy section includes dummy1 and dummy2 sections before and after the printing pattern, and the dummy section may include the acceleration section and the deceleration section . The dummy section is a section in which the ink is only ejected without movement.

It is very important to use the constant velocity section as the printing section. For this purpose, the Dummy1 section and the Dummy2 section are used. In the dummy section, when the speed is increased or decelerated without discharging, the printing pattern interval (x1, y1) and (x2, y2) It is possible to obtain a uniform printing pattern. Here, for the distance between the acceleration section and the deceleration section, the distance is further increased by a distance dummy1 section (x1 ', y1') and (x1, y1) on the same straight line as the printing pattern, (a section between (x2, y2) and (x2 ', y2')).

The total length of the printing pattern length ((x1, y1) and (x2, y2)) in which the section (printing section) in which the discharging head 110 moves at a constant speed and the section in which the discharging head 110 is accelerated or decelerated and moves (dummy section) The interval between the first and second ends may be longer.

On the other hand, at the designated vector velocity over the entire section (x1 ', y1') and (x2 ', y2') during which the ejection head 110 or the object 120 must move simultaneously, ). The ejection trigger is generated by the encoder processing unit 170, whether or not the ejection head 110 moves by the designated ejection trigger interval, whether or not the ejection trigger is generated, and the like. . ≪ / RTI >

이 10um가 될 때 토출간격 만큼 이동했다고 판단하고 토출 트리거 생성부(176)에서 1개의 토출 트리거를 발생시키게 된다.The movement distance determination unit 175 of the encoder processing unit 170 determines whether the vector distance calculated from the encoder count values obtained from the first and second encoder counters 173 and 174 is equal to the ejection interval del, The determination result can be transmitted to the discharge trigger generating unit 176 so that the discharge trigger is generated only when the head 110 moves by the discharge interval del. For example, when the first and second encoders 150 and 160 are 0.5 um encoders and the movement interval (ejection trigger interval) is 10 um, the movement distance in the X-axis direction is dx and the movement distance in the Y- dy,

The ejection trigger generating unit 176 generates one ejection trigger.

In this way, the ejection trigger generator 176 can generate one ejection trigger for each ejection interval.

Here, the ejection trigger is a signal for ejecting the ink in the ejection head 110, but ink should not be ejected when the ejection head 110 is in the dummy section. The ejection trigger control unit 177 controls the ejection trigger generated at every ejection interval so that the ejection timing of the ejection head 110 in the ejection interval when the ejection head 110 moves at a constant speed, that is, when the ejection head 110 or the object 120 moves the vector using the XY stage So that ink can be ejected from the ejection head 110. [0050] FIG. Such ejection triggers can be counted and printed only in the printing section of the constant velocity section. The ejection trigger control unit 177 internally generates the ejection trigger generated when the ejection head 110 is in the ejection interval in the acceleration section and the deceleration section, that is, the dummy section, and does not output the ejection trigger to the outside, that is, to the ejection head 110 side .

In this way, when the discharge head 110 moves at a constant speed, the discharge trigger is output through the discharge trigger output unit 190 and is transmitted to the discharge head 110 or the head driver (115 in FIG. 2) The ejection trigger is not transmitted from the encoder processing unit 170 to the ejection trigger output unit 190. In this case,

The ejection position from the position (x1 ', y1') counts the ejection trigger signal output from the encoder processing unit 170 at a predetermined ejection interval (distance) using the encoder counters 173 and 174, A trigger signal is output from the point at which the Dummy 1 section ends, and a trigger signal is output for the length of the printing section corresponding to the length of the printing pattern (trigger signal out, on). Since the trigger signal is not output after the printing is finished (jetting trigger off), printing is not performed in the Dummy 2 section.

In this manner, the ejection trigger is generated internally from the position (x1 ', y1') for the same ejection interval del, but the trigger output for jetting is turned on only in the printing section, The processing unit 170 is controlled.

The encoder processing unit 170 can be operated only when the discharge head 170 is moving at a constant speed or in a printing section. In addition, it is possible to transmit the trigger signal to the head 110 only in the section for printing although it is operated in the whole section.

Hereinafter, a printing method using the printing electronic vector printing system 100 according to the present invention will be described with reference to the drawings.

Referring to FIG. 6, a printing electron vector printing method according to an embodiment of the present invention is a printing method using the printing electronic vector printing system 100, Step 1100; Dividing the moving section into an ejection section and a non-ejection section (1200); Obtaining (1300) a vector ejection interval of the ejection head (110) or the object (120) over a moving interval; Counting the encoder signal and generating an eject trigger (1400); Determining (1500, 1700) whether a point of occurrence of the ejection trigger exists between the ejection section or the exit of the via hole; And a step (1800) of outputting an ejection trigger to eject the ink when the ejection trigger is located between the ejection openings.

In the step 1100 of determining the moving period of the discharging head 110, the moving period means a section from the position (x1 ', y1') to (x2 ', y2') in Fig. 5A.

In addition, in the step 1100 of determining the moving interval of the discharging head 110, the moving interval may be determined to be longer than the length of the printing pattern.

In the step 1200 of dividing the moving section into the discharging section and the non-discharging section, the discharging section corresponds to the printing section in FIG. 5 (b), and the non-discharging section corresponds to the dummy section (Dummy1, Dummy2). That is, in the step 1200 of dividing the moving section into an ejection section and a non-ejection section, the ejection section includes a section in which the ejection head 110 or the object 120 moves vector at a constant velocity, And may include a period during which the ejection head 110 or the object 120 is accelerated or decelerated.

Meanwhile, in the step 1200 of dividing the moving section into an ejection section and a non-ejection section, the non-ejection section may include a section in which the ejection head moves at a constant speed. Referring to FIG. 5 (b), in the non-ejection period, that is, during the dummy period, the ejection head 110 may not only accelerate or decelerate, but also move at a constant speed. Also, as shown in FIG. 8, the constant velocity section may be longer than the printing section.

In the step 1200 of dividing the moving section into an ejection section and a non-ejection section, the ejection section and the non-ejection section convert an encoder signal generated in the two XY axis encoders into a pulse signal for each single vector distance, And the number of ejection trigger or digital pulse signals obtained by counting the number of trigger pulses generated at each ejection interval.

In the step 1300 of finding the discharge interval of the discharge head 110 over the moving interval, as shown in Fig. 5 (a), the discharge interval del is obtained by finding the discharge interval having the same length over the entire moving interval need. That is, in step 1300 of obtaining the ejection interval of the ejection head over the movement interval, since vector axes move more than two axes during vector printing, the vector ejection interval is found, and the ejection interval can have the same value over the movement interval.

In the step 1400 of counting the encoder signal and generating the ejection trigger, the encoder signal generated in the encoders 150 and 160 is counted while the ejection head 110 moves the distance corresponding to the ejection interval, 110 or the object 120 is moved, the discharge trigger can be generated.

In the steps 1500 and 1700 of determining whether a discharge trigger occurrence point exists between the discharge section and the discharge port, if the point where the discharge trigger is generated is in the non-discharge section (dummy section or acceleration section or deceleration section) , The ejection trigger generated is not turned on and sent to the ejection head 110 even if it is outputted. On the other hand, when the point at which the ejection trigger occurs is in the ejection section (printing section or constant speed section), the ejection trigger can be output or sent to the ejection head 110 to eject the ink. At this time, since the position of the ejection moves by moving the ejection head 110 or the object 120 at the same time, the ejection interval must generate the ejection trigger using the vector distance of XY.

Referring to FIG. 6, after the step 1400 of generating an ejection trigger at every ejection interval, it is determined whether a point where the ejection trigger is generated exists between the exit ports (1500). That is, it is determined whether the discharge head 110 is in a dummy section where acceleration or deceleration is performed. In the case where the discharge head 110 is located in the dummy section, a step 1600 of not outputting the generated discharge trigger, that is, a step in which no ink discharge occurs even when the discharge trigger is generated is performed. If the ejection head 110 does not exist in the dummy section, it is determined whether the ejection head 110 is between the printing section or the constant velocity section, that is, the ejection opening (1700).

When the discharge head 110 is present between the discharge ports, the discharge trigger output unit 190 outputs the discharge trigger to discharge the ink (1800). If the ejection head 110 does not exist between the ejection openings, step 1500 may be performed again.

After the ejection trigger is output by the ejection trigger output unit 190 and the ink is ejected (1800), it is determined whether the ejection head 110 is moving at a constant speed (1900). Step 1900 is a step of determining whether the discharge head 110 is still in the printing section.

FIG. 7 illustrates a screen of software for operation of the encoder processing unit 170 of the printed electronic vector printing system 100 according to the present invention.

Meanwhile, the printing electronic vector printing system 100 and the printing method according to the present invention can be applied not only to vector printing of the printing pattern P2 shown in FIG. 8, but also to the case of vector printing of the printing pattern P2 shown in FIG. 9 . ≪ / RTI >

In the case of FIG. 9, the printing pattern P2 to be finally printed is a rectangular shape. Printing is performed in the interval P2, and printing is not performed in the intervals P1 and P3. That is, the interval P2 is a constant velocity interval, and the intervals P1 and P3 are dummy intervals. As described above, the printing electronic vector printing system 100 and the printing method according to the present invention can be applied to vector printing of various patterns. The acceleration and velocity information of the stage can be used to calculate the dummy section. For example, the dummy section can be calculated from the length to make the speed constant, and it is only necessary to move the stage by adding the dummy section of the front part and the dummy section of the rear part in the printing area. At this time, the calculated dummy section area needs to be set to the encoder processing unit 170 by using the PC communication before printing, and if the printing area is moved in this state, printing can be automatically performed at the constant speed section.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Accordingly, the spirit of the present invention should not be construed as being limited to the embodiments described, and all of the equivalents or equivalents of the claims, as well as the following claims, belong to the scope of the present invention .

100: Vector printing system
110: Discharge head 120:
130: head driving part 140:
150: first encoder 160: second encoder
170: Encoder processing unit 190: Discharge trigger output unit

Claims (8)

An ejection head for ejecting ink;
An object on which a printing pattern is printed by the ejection head;
A discharge actuator for moving the discharge head or the discharge object;
A first encoder for sensing a movement distance of the ejection head or the object in the X axis direction;
A second encoder for sensing a movement distance of the ejection head or the object in the Y-axis direction; And
And an encoder processing unit for counting signals of the first and second encoders to control whether the ejection heads are ejected or not and generating ejection triggers at constant ejection intervals using encoder signals of two or more axes,
Wherein the encoder processing unit comprises: first and second encoder signal receiving units respectively receiving encoder signals in the first and second encoders; A first encoder counter and a second encoder counter for counting the encoder signals received by the first and second encoder signal receivers, respectively; A movement distance determination unit for obtaining a movement distance of the ejection head based on a count value of the first and second encoder counters; An ejection trigger generating unit for generating an ejection trigger when the movement distance of the ejection head obtained by the movement distance determination unit is equal to the ejection interval; And a discharge trigger controller for determining whether the discharge trigger generated by the discharge trigger generator is output,
Wherein the movement distance determination unit determines whether or not the vector distance calculated from the encoder count value obtained in the first and second encoder counters is equal to the ejection interval, and only when the ejection head moves by the ejection interval, To the discharge trigger generating unit,
Wherein the ejection trigger control section outputs the ejection trigger only when the ejection head moves at a constant speed to eject ink from the ejection head.
delete delete delete The method according to claim 1,
When the ejection head moves at a constant speed, the ejection trigger is outputted through the ejection trigger output part and transmitted to the ejection head,
Wherein when the ejection head is accelerated or decelerated, the ejection trigger is not transmitted from the encoder processing unit to the ejection trigger output section in a length section set as a dummy in the acceleration / deceleration section.
6. The method of claim 5,
And the encoder processing unit is operated only when the discharge head is moving at a constant speed.
The method according to claim 1,
Wherein the ejection trigger generating unit generates one ejection trigger for each ejection interval.
6. The method of claim 5,
Wherein a sum of a section in which the discharge head moves at a constant speed and a section in which the discharge head moves in acceleration or deceleration is longer than a length of the printing pattern.

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