KR20170077795A - Apparatus for applying ink and method therefor - Google Patents

Abstract

(EN) An ink applying device capable of landing a specified droplet number without leaving a cell even when the dimension of a cell in the column direction (X) is shortened.
A non-ejection nozzle data portion for storing the position of the non-ejection nozzle; and a non-ejection nozzle data portion for storing the position of the non-ejection nozzle, And a nozzle direction discharge number information section for holding the nozzle direction discharge number information based on the discharge direction information of the nozzles in the discharge direction of the discharge cell when the number of the nozzles for discharging the ink in the cell is insufficient, And an ink application device having a control section for driving the head to eject the ink plural times before and after the ejection timing of the nozzle is used.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an ink applying apparatus and an ink applying method,

The present invention relates to an ink applying apparatus and an ink applying method. In particular, the present invention relates to an ink applying apparatus and an ink applying method provided with an ink jet head used for a light emitting layer of a display panel for a display device such as an organic EL (Electro Luminescence) or other application processes.

As a method of forming the organic light emitting layer of the organic EL display panel, there is a method of coating a low molecular organic material or a high molecular organic material together with a solvent. One typical means of forming an organic light emitting layer by applying a solvent is a method of discharging a droplet of an ink containing an organic light emitting material onto a cell of a display substrate using an ink application device. At this time, the droplets of the ink to be ejected include an organic light emitting material and a solvent.

A general ink applying apparatus has an ink jet head having a plurality of nozzles. In the ink applying apparatus, ink is ejected from the nozzles while controlling the positional relationship between the nozzles of the inkjet head and the object to be printed. As a result, ink is applied to the printing object (see, for example, Patent Document 1). Patent Document 1 discloses that a liquid droplet deposited on a substrate spreads in a concave portion called a cell in the same direction to form a pixel having a predetermined line width.

When a plurality of pixels having a line width are formed by using a plurality of nozzles of an inkjet head, a plurality of nozzles arranged in a columnar shape is used from the viewpoint of manufacturing efficiency. The number of nozzles to be used increases with the increase in the resolution of the display and the increase in the size of the display. When dry ink or foreign matter adheres to this nozzle, the application position or amount of ink is deviated from the designed value. As a result, this nozzle becomes a defective nozzle.

The non-discharge nozzle which can not discharge the ink is generated only by stopping the discharge of the droplet even a little (for example, discharge stop for 60 seconds). There is a case where a non-discharge nozzle which can not discharge ink may be generated even in the continuous discharge state. Therefore, in general, a recovery operation for sucking ink from the non-discharge nozzle is performed (see, for example, Patent Document 2).

In order to omit this recovery operation, when a defective nozzle or a non-discharge nozzle is generated, a method of compensating the application amount of the ink to other nozzles which are close to each other instead of discharging the ink from the defective nozzle or the non-discharge nozzle (See, for example, Patent Document 3).

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a diagram showing the relationship between an ink jet head disclosed in Patent Document 3 and a discharge result to a substrate at an object to be coated. FIG. 1, the inkjet head 51 is provided with a plurality of nozzles for application to the substrate 52. In Fig. The plurality of nozzles are disposed such that the cells 53a, 53b, and 53c surrounded by the lattice-shaped walls in the scanning operation are in the ink adhering position (so-called landing point). The direction indicated by the column direction X is the scanning direction (scanning direction) of the ink-jet head 51 or the substrate 52. Thereafter, it is set in the column direction (X). The arrangement direction of the nozzles is defined as the row direction (Y).

Three cells are described as an example. And eight droplets are ejected to each of the cells 53a, 53b, and 53c. The cell 53a represents the discharge state in the case where all of the cells 53a are applied by the normal discharge nozzles 1 to 8. FIG. As shown in the cell 53a, the ink is normally discharged from all the nozzles. The cell 53b shows the discharge state in the case where the non-discharge nozzles 12 alone occur in the same cell. As shown in the cell 53b, when the non-discharge nozzle is generated singly, the quantity of liquid discharged from the discharge nozzle 13 in the cell to be coated by the non-discharge nozzle is doubled, that is, twice The application data is prepared by applying the ink by the droplet to complement it. At this time, the discharge frequency is doubled as usual. The cell 53c shows the discharge state in the case where two non-discharge nozzles are consecutively formed in the same cell. As shown in the cell 53c, when two unfilled nozzles 25 and 26 occur in the same cell, in the single scan, the other two discharge nozzles in the cell to be coated with the two unfit discharge nozzles (No. 24 and No. 27) are applied by two droplets to prepare application data for supplementing the ink. The black circle in each of the cells 53a, 53b, and 53c indicates the ejected droplet, and the white circle indicates that the corresponding nozzle does not eject.

Japanese Patent Application Laid-Open No. 2003-266669 Japanese Patent Application Laid-Open No. 2004-142422 Japanese Patent Application Laid-Open No. 2011-018632

The number of times that each nozzle can be discharged for the same application region is progressing in a direction in which the display panel is made to have a high resolution. In order not to lower the manufacturing efficiency, it is necessary to set the preparation time required for completing the discharge nozzle at the time of occurrence of the discharge failure nozzle as short as possible.

It is necessary to shorten the length of the column direction X of the cell 53a of FIG. 1, and it is impossible to eject more than two in the column direction X. In this case, when the non-discharge nozzle is generated in the cells 53b and 53c, if two dischargers are discharged, there is a possibility that the cells will be coated on the outside of the cell, or a specified amount of liquid droplets will not land on the cell, There is a problem that it causes cell or mixed color emission.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and it is an object of the present invention to provide a liquid discharge device capable of discharging liquid droplets of a non-discharge nozzle And an ink application method that can complement the ink application device.

In order to solve the above-described problems, there is provided a liquid ejection head comprising: a head for ejecting ink from a plurality of linearly arranged nozzles; a stage which moves in a scanning direction relative to the head to hold an object to be coated; A non-discharge nozzle data portion for storing the position of the non-discharge nozzle among the plurality of nozzles, and a non-discharge nozzle data portion for storing the position of the non-discharge nozzle among the plurality of nozzles, The number of the cells in the nozzle array direction of the object to be coated and the nozzle direction discharge number information indicating the application start point nozzle number, the coating end point nozzle number, and the application number of each cell in the nozzle arrangement direction A position of the non-discharge nozzle, a position of the discharge nozzle, From the nozzles that can be applied to the same cell as the non-discharge nozzles, the discharge timing of the other discharge nozzles is not ejected from the nozzles, And a control section for driving the head so as to compensate for insufficient droplets for the non-discharge nozzle.

In addition, for a coating object having a plurality of cells separated in the row direction and the column direction, a head having a plurality of nozzles arranged in the row direction is relatively scanned in the column direction, And obtaining ejection number information in the nozzle direction indicating the application time point nozzle number, the coating end point nozzle number and the application number for each cell in the row direction on the basis of the application image for each nozzle indicating the target application pattern From the ejection failure information in the direction of the nozzle and the non-ejection nozzle position information specifying the non-ejection nozzles in a plurality of the nozzles, the ejection amount information necessary for ejecting the ejection nozzles from the non-ejection nozzles And a discharging step of discharging the ink to the cell in the determining step, Wherein when the nozzle is deficient, the nozzle is discharged from the nozzle in the same cell as the non-discharge nozzle a plurality of times in a column direction different from the discharge timing of the other discharge nozzle so as to compensate for the deficient droplet of the non- And an ink applying method including a complementary process of driving.

According to the present invention, the specific nozzle for discharging droplets of the discharged water of the non-discharge nozzle replaces the deficient droplet of the non-discharge portion a plurality of times before and after the discharge timing in the column direction of the adjacent nozzles of the discharge allocation , Even if the dimension of the cell in the column direction (X) is shortened due to the high resolution, the droplet number of the non-discharge nozzle can be compensated by landing the specified droplet number without leaving the cell.

Since it is possible to cope with a change in the generation of the non-discharge nozzle by simply modifying a part of the original data on the basis of the nozzle discharge number data, the non-discharge nozzle position data, and the timing data, (Write) to hardware such as a memory of the application data, and does not require replacement of the application data at the occurrence of non-discharge, so that the manufacturing efficiency can be maintained without increasing the print preparation time.

FIG. 1 is a schematic view for explaining a method of supplementing a non-discharge nozzle of an ink jet head disclosed in Patent Document 3. FIG.
Fig. 2 (a) is an enlarged plan view of a conventional substrate for a display panel, Fig. 2 (b) is a sectional view taken along the line AA in Fig. Sectional view taken along CC line segment.
3 is an explanatory diagram of (a) a dimension of a cell of a conventional display panel and an enlarged view showing a pixel pitch (P) of each pixel, (b) a dimension of a conventional pixel pitch of a display panel and a possible number of discharges.
Fig. 4 (a) is a view showing a discharge state when droplets are discharged at a discharge frequency of 15 kHz at a speed of 50 mm / s to a 100 ppi cell of a conventional display panel, Fig. 4 (b) s at a discharge frequency of 15 kHz. Fig.
Fig. 5 is a diagram showing the arrangement of the N3 part and the landing grid of Fig. 3 (b), the arrangement of the application data of (b) (a) (C) shows the arrangement of the cell and the landing grid when the discharge nozzle is generated, and (d) the arrangement of the application data in (c).
6 is a conceptual diagram of an ink application device according to the first embodiment of the present invention.
7 is an explanatory diagram of a target coated image and non-discharge nozzle information in the first embodiment of the present invention.
8 is a flowchart of a nozzle discharge number data generating method according to the first embodiment of the present invention.
9 is a waveform diagram of the discharge drive waveform signal in the first embodiment of the present invention.
10 is a circuit diagram of the discharge instruction data calculator and the nozzle drive controller according to the first embodiment of the present invention.
11 is an input / output state diagram of the nozzle drive controller according to the first embodiment of the present invention.
12 is an explanatory diagram of the in-cell landing spread for each discharge stroke in the first embodiment of the present invention.
FIG. 13 is a graph showing the relationship between the ejection nozzle number in the first embodiment of the present invention from the states 2, 3, and 6 to the states 2, 3, 6, 8, 9, 12, and information on the landing position.
Fig. 14 is an explanatory view of a head in a case where a plurality of nozzles arranged in the row direction Y in the first embodiment of the present invention are arranged in the row direction X. Fig.
Fig. 15 is a plan view of a substrate to be coated according to a second embodiment of the present invention, and Fig. 15 (b) is a cross-sectional view showing a relationship between a discharge position of ink and a cell of a substrate to be coated in the second embodiment of the present invention (C) is a plan view showing the relationship between the discharge position of the ink and the representative cell of the substrate to be coated in the second embodiment of the present invention.
16 is a conceptual diagram of an ink application device according to the second embodiment of the present invention.
17 is an explanatory diagram of a target coated image and non-discharge nozzle information in the second embodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<Detailed description of the task>

 First, before describing the first embodiment of the present invention, a description will be given of a state of high-definition display of the display panel and a state of realization in the conventional method so as to follow it, and the details of the problem Describe.

Fig. 2 (a) is an enlarged plan view of the display panel substrate in the first embodiment. Fig. In the substrate 1, a plurality of cells 1c are provided along the column direction X (scanning direction) and the row direction Y (nozzle array direction). The cell 1c is partitioned for each luminous color at the position by the bank 1b (wall) extending in the row direction Y. [

Fig. 2B is a sectional view taken along line A-A of the display panel, Fig. 2C is a sectional view taken along line B-B of the display panel, and Fig. 2D is a sectional view taken along line C-C of the display panel.

The bank 1b is formed on the liquid repellent film 1a formed on the substrate 1. [ The liquid repellent film 1a is not formed in the cell 1c. A liquid repellent film 1a is formed between adjacent cells 1c in the row direction Y.

Fig. 3 (a) shows the dimensional relationship of the cell 1c and the adjacent cell 1c in the first embodiment. One pixel of the display panel is composed of one cell 1c of each of R cells, G cells, and B cells, and is made up of three cells 1c in total. Fig. 3A shows the pixel pitch P, the color cell width H, and the droplet landing possible range L of each pixel. In this case, one pixel pitch P is formed by three cells 1c.

Fig. 3 (b) is a list of the dimensions for the pixel pitch and the number of discharging times. Here, the resolution of the pixel is changed from 100 to 400 ppi every 50 ppi, and the corresponding dimension condition and the number of discharging times for each printing operation condition are listed in the table.

The ejection pixel pitch P and the color cell width H were calculated to calculate the droplet landing possible range L when the ejected droplet was 1.0 pl (picoliter) and the droplet diameter was 12.5 占 퐉.

The number of discharging times was determined by changing the printing speed (the relative moving speed of the nozzle and the substrate 1) to 50 mm / s, 100 mm / s, and 200 mm / s to set the discharging frequency , The number of discharging times that can be discharged without flowing over from the inside of the cell 1c at 30 kHz is described.

For example, when the resolution is 100 ppi, the discharge pixel pitch P is 254 m, the color cell width H is 64 m, and the droplet landing possible range L is 51 m. When the printing speed is 50 mm / s and the discharge frequency is 15 kHz, the number of discharging times is 16.3 (N1 portion).

Similarly, when the resolution is 400 ppi, the discharge pixel pitch P is 64 m, the color cell width H is 16 m, and the droplet landing possible range L is 3 m. When the printing speed is 50 mm / s and the discharge frequency is 15 kHz, the number of discharging times is 2.0 (N2 portion).

Fig. 4 (a) shows the N1 portion in Fig. 3 (b). That is, in the case where the resolution is 100 ppi, the printing speed is 50 mm / s, and the ejection frequency is 15 kHz, the number of ejection possible times is 16.3 times.

Fig. 4 (b) shows the N2 portion in Fig. 3 (b). In other words, the number of ejection possible times is 2.0 times when the resolution is 400 ppi, the printing speed is 50 mm / s, and the ejection frequency is 15 kHz.

As described above, when the super-high resolution is about 400 ppi, the number of discharges into the cell 1c is about 0.0 mu m, which is twice the discharge deviation of the discharged liquid droplets. In addition, when the landing deviation of the ejected droplets is 3.0 占 퐉, the number of discharging times into the cell 1c becomes about one time. As a result, it is inevitable to apply the coating in a single coating in the X direction (scanning direction) and in a linear shape in the Y direction.

Fig. 5 (a) shows the cell arrangement of the N3 portion and the landing grid in Fig. 3 (b). In this embodiment, 12 ink nozzle heads are arranged at regular intervals in the row direction (Y), and the substrate 1 is relatively moved in the column direction X to land the ink on the cell 1c .

That is, when the resolution is 300 ppi, the print speed is 200 mm / s (Vx), the droplet discharge frequency is 30 kHz (Fn), and the dischargeable number is 2.3 times, the pitch between the nozzles is 21.2 μm ), And is a grid of dashed lines with a scanning direction pitch (ejection interval) of 6.7 mu m (Px).

The black circle at the intersection of the landing grid represents the ink discharge point 2a and the white circle represents the non-greening point 2b of the ink. In Fig. 5 (a), if the landing deviation is added, the number of discharging times into the cell 1c becomes about one time. As a result, a linear discharge arrangement is obtained.

In this example, three discharge points are arranged in each cell 1c. Numbers 1, 5, and 9 in the lower part indicate the number of the corresponding nozzle. That is, 1, 5, and 9 indicate nozzles 1, 5, and 9, respectively.

Fig. 5 (b) shows the arrangement of the application data in Fig. 5 (a). The ejection was denoted by 1 and the non-ejection by 0.

5 (c), the nozzles No. 2, No. 3, and No. 6 become the non-discharge opening 2c in the nozzle distribution of FIG. 5 (a), and the nozzles No. 4 and No. 8, It is used as a nozzle. And the discharge grating 2d of the replacement discharge nozzle is shown.

Fig. 5 (d) shows the arrangement of the application data in Fig. 5 (c). The numerical portion surrounding each of the black frame J shows the coating data portion in which the non-discharging state is not shown in Fig. 5 (a) and the coating data portion in which the discharging state is different in Fig. 4 (c) in which there is no discharging. It is necessary to change the data by the discharge state. A data replacement portion occurs in an unspecified discontinuous region in the application data depending on the position of the non-discharge nozzle and the position of the prepared replacement nozzle. For this reason, it is necessary to reconstruct (re-create) the entire application data.

&Lt; Problem: Insufficient discharge discharge in the cell at the time of supplementing fire discharge &gt;

 5 (a) and 5 (c), it can be seen that, in the case of the non-discharge nozzle of Fig. 5 (c) And it becomes three enemies for three enemies of demand. However, in the cells in which the nozzles # 1 to # 4 are in operation, even if the compensating action is performed, the number of the required number of the enemy is three.

(Embodiment Mode 1)

Next, Embodiment 1 of the present invention will be described.

Fig. 6 is a conceptual diagram of an ink application device according to the first embodiment. Fig. 7 shows the non-discharge nozzle information of the nozzle to be used and the application image 3 in which the ink discharge position is indicated two-dimensionally when printing is performed by the ink application device.

It is assumed that the number of cells 1c is nine in this example, and each cell 1c satisfies the required amount of ink by three discharges. The black circles are the ejection positions, and the white circles are the non-ejection positions.

The coated image 3 shown in Fig. 7 is made up of a two-dimensional coordinate system of the nozzle arrangement direction (row direction Y) and the nozzle scanning direction (column direction X). In the coated image 3, points to be ejected from the nozzles were connected in a lattice shape by broken lines. The intersection is the point at which the droplet is ejected. In this example, three discharge points are allocated in the cell 1c from the left end. The display of the first column, the second column and the third column on the upper side of the coated image 3 shows the arrangement of the cells 1c in order from the left in the column numbers. The display of the first row, the second row and the third row of the left side of the coated image 3 shows the arrangement of the cells 1c in the order of the row numbers from the top.

The scan direction ejection position information 4a is position information on which the coated image 3 is projected in the row direction Y of the substrate 11. The black circle is the position on the substrate to be discharged, and the white circle is the position not discharging. The numerical value shown on the left side of the scanning direction discharge position information 4a is the discharge position number in the column direction X discharged onto the substrate 1. [

7, the discharge direction number information 7a in the nozzle direction described above on the application image 3 is information on the basis of the application image 3, and is information on the number of cells held by the nozzle, The nozzle number of the end point, and the information of the number of fires. Specifically, the number of cells is three in the first to third columns, and the cells in the first column correspond to the nozzle number 1 in the viewpoint nozzle, the nozzle number 4 in the end point nozzle, the number 3 in the cell 1c in the first column Therefore, the information on the cell in the first column is represented by (1, 4, 3).

Similarly, the information on the cell in the second column is indicated by (5, 8, 3). Information on the cell in the third column is indicated by (9, 12, 3). This figure is represented by a nozzle number that ejects a black circle and a nozzle that does not eject a white circle. The numerical values described above are modeled by nozzle numbers with nozzle number 1 and nozzle number 12.

The non-discharge nozzle position information 8a described above on the discharging number information 7a in the nozzle direction is information on the nozzle number of the discharging number information 7a in the nozzle direction, to be. The white circles are the ejectable nozzles and the x is the non-ejecting nozzles. The numerical values given above are nozzle numbers with nozzle number 1 and nozzle number 12. This information is obtained in advance based on the result of printing by the nozzle in advance.

<Configuration of whole>

 In Fig. 6, the substrate 11, which is an object to be coated, is mounted on the moving stage 12. Fig. The inkjet head 18 and the substrate 11 are relatively moved in the X direction (scanning direction), and the ink droplet is ejected from the nozzle of the inkjet head 18 to the substrate 11. [

The substrate 11 has a plurality of cells 1c separated in the row direction Y (arrangement direction of the nozzles) and the column direction X (scanning direction). The nozzle discharge frequency Fn (period of ink discharge) and the interval Px of discharge positions in the column direction X are predetermined. The moving stage 12 is moved in the stage scanning direction X direction by the stage scan speed Vx calculated from the nozzle discharging frequency Fn and the interval Px between the discharging positions in the column direction X ) And the moving stage 12 move relatively).

This ink applying device has an ink jet head 18 having a plurality of nozzles arranged in the row direction (Y). The ink jet head 18 is a head that discharges ink from the nozzles to the cell 1c. Further, the arrangement of the nozzles is not limited to a straight line. They may be arranged in a zigzag manner. It can be corrected by adjusting the timing of ejection.

The discharge timing holding section 21 maintains the timing of the reference to be applied with the target coated pattern from the coated image 3 and the stage scan speed.

The ink applying device has a non-discharge nozzle data portion 8 for storing non-discharge nozzle position information 8a indicating a non-discharge nozzle position specifying a non-discharge nozzle among a plurality of nozzles.

The ink application device is configured to calculate the number of cells in the row direction Y and the number of cells in the row direction Y on the basis of the application image 3, And a nozzle direction ejection number information section 7 for retaining the number information 7a.

When the number of nozzles for ejecting ink to the cell 1c is insufficient from the output of the nozzle direction ejection number information section 7, the output of the non-ejection nozzle data section 8, and the ejection timing holding section 21, Which is different from the ejection timing of the other ejection nozzles, from the other specific nozzles to be applied to the same cell, and drives the inkjet head 18 so as to compensate for the deficient droplets of the non-ejection fractions (22).

6, ink is printed on each cell 1c of the substrate 11 set on the movable stage 12 by the inkjet head 18. [ The ink jet head 18 is driven as follows.

The discharge timing holding section 21 has a scan direction discharge position information retainer 4, a scan direction ejection timing data generator 5 and a scan direction ejection timing data retainer 6. [

The scan direction discharge position information retainer 4 holds the scan direction discharge position information 4a.

The scan direction ejection timing data generator 5 converts the scan direction ejection position information 4a received from the scan direction ejection position information retainer 4 into the interval Px of ejection positions in the designated column direction X, And outputs it as scan direction ejection timing data 6a.

The scan direction ejection timing data retainer 6 receives and holds scan direction ejection timing data 6a from the scan direction ejection timing data generator 5. [

The scan direction ejection timing data 6a indicates the ejection state at each timing in 1/0.

The control unit 22 includes a nozzle discharge number data generator 9, a nozzle discharge number data retainer 10, a position detector 13, a discharge timing generator 14, a drive signal generator 15, A discharge instruction data calculator 16, and a nozzle drive controller 17.

The nozzle discharge number data generator 9 calculates the nozzle discharge number information 7a from the nozzle discharge number information section 7 and the discharge nozzle position information 8a from the discharge failure nozzle data section 8 And determines the discharge method to each nozzle and outputs it as the nozzle discharge number data 10a.

The nozzle discharge number data retainer 10 receives and holds the nozzle discharge number data 10a from the nozzle discharge number data generator 9. [ The nozzle discharge number data 10a indicates the discharge number of each nozzle in terms of two, one, and zero values.

The position detector 13 converts the position information of the moving stage 12 into a pulse signal to generate a position information pulse.

The discharge timing generator 14 divides the position information pulse signal outputted from the position detector 13 based on the interval Px of the discharge positions in the predetermined column direction X to generate and output the discharge timing signal do.

The driving signal generator 15 outputs three kinds of driving waveform signals for ejecting ink from the nozzles of the inkjet head based on the ejection timing signal from the ejection timing generator 14. [

The discharge instruction data calculator 16 calculates the discharge direction of the nozzle 11 in accordance with the data of the scan direction discharge timing data 6a from the scan direction discharge timing data retainer 6 and the data of the nozzle discharge number data 10a ), Performs logic operation, forms a discharge timing signal from the discharge timing generator 14, and outputs a waveform selection signal.

The nozzle drive controller 17 selects the drive waveform from among the three types of drive waveform signals from the drive signal generator 15 in accordance with the waveform selection signal from the discharge instruction data calculator 16, To the nozzles. The inkjet head 18 ejects droplets from the nozzles inside the heads in accordance with the drive waveform for each nozzle from the nozzle drive controller 17. [

<Application Method>

 Next, an example in which a specified number of droplets can be landed even when a non-discharge nozzle is generated at the time of single discharge in the column direction X will be described with reference to Figs. 6 and 7. Fig.

First, prior to printing, a printing operation is performed to obtain the occurrence situation of the non-discharge nozzle in the ink-jet head 18. In this example, it is assumed that the nozzles 2, 3, and 6 are non-ejection like the non-ejection nozzle position information 8a in Fig.

5 (a) is applied to the substrate 11 at a pixel pitch of 300 ppi. The printed pattern at this time is the coated image 3. The print pattern is a plan view showing the relationship between the discharge position and the non-discharge position and the position of the cell 1c. First, the manner of printing on the substrate 11 in accordance with the application image 3 in the ink jet head 18 having the non-discharge nozzle position information 8a will be described.

The coated image 3 is projected in the row direction Y to obtain the scan direction discharge position information 4a. As a result, it can be seen that the ejection is performed at the scan position numbers 1, 5, and 9, and the ejection is not performed at the other numbers.

Next, the coated image 3 is projected in the column direction X to obtain discharge number information 7a in the nozzle direction. As a result, the total number of the cells 1c is 3, the cell 1 (the usable time nozzle number is 1, the end point nozzle number is 4, The number of the nozzles is 8, and the number of injected injections is 3), the cell 3 (the usable time nozzle number is 9, the end point nozzle number is 12, and the number of injections is 3).

As described earlier, in this example, since the pixel pitch is high at 300 ppi, the cell 1c is coated in a straight line in the column direction (X). The application of two droplets for two cycles from the same nozzle is not possible because it comes out from the cell 1c. That is, the coated image 3 is formed from a discharge point or a clearing point of a straight line in the cell 1c.

In the column direction X, the straight discharge specification point in the cell 1c is always discharged or non-discharged in the same nozzle. For example, the cell 1 column (1, 4, 3) in Fig. 6 is for a cell of 1 row 1 column, a cell of 2 row 1 column, and a cell of 3 row 1 column. In the three cells, the ejection and non-ejection operations of the nozzles are the same. In this way, the coated image 3 can be accurately described from the discharge direction number information 4a in the scan direction and the discharge number information 7a in the nozzle direction. The use of this characteristic makes it unnecessary to provide the total discharge and non-discharge information (108 points by the product of the 12 nozzles and 9 positions) of the coated image 3 and the discharge position information 4a in the scan direction in the column direction X, (9 points) and the discharge direction number information 7a (12 nozzles) in the nozzle direction (21 points as the sum of 9 and 12).

The amount of data is about one-fifth of that in the conventional case, and the communication time of the change data becomes short. For this reason, the method and apparatus of this embodiment have high production efficiency.

The ejection position information 4a in the scan direction in the column direction X is stored in the ejection position information storage unit 4 in the scan direction in the column direction X and the ejection number information 7a in the nozzle direction is stored in the nozzle direction ejection number information unit 4. [ (7). The non-discharge nozzle position information 8a (second, third and sixth nozzles) is stored in the non-discharge nozzle data portion 8, which is obtained first.

The scan direction ejection position information 4a of the column direction X held in the scan direction ejection position information retainer 4 in the column direction X is input to the scan direction ejection timing data generator 5, do. Since the ejection position information 4a in the scan direction in the column direction X is described in the ejection / non-ejection manner at the column direction X pitch (ejection interval) 6.7 占 퐉 (Px) described above with reference to Fig. 4 , And the data is converted so that the pitch and the ejection timing signal generated by the ejection timing generator 14 are matched with each other. In this example, data conversion is performed one by one. The data converted into and outputted from the scan direction discharge timing data generator 5 is stored as the scan direction discharge timing data 6a in the scan direction discharge timing data retainer 6. [

Discharge number information 7a in the nozzle direction stored in the nozzle direction ejection number information section 7 and non-ejection nozzle position information 8a stored in the non-ejection nozzle data section 8 are input to the nozzle ejection number data generator 9 To determine the discharge method for each nozzle, and output as the nozzle discharge number data.

&Lt; Generation of nozzle discharge number data &gt;

 In the nozzle discharge number data generator 9, the discharge method is determined based on the flowchart of FIG.

In the step S1, "Is there a fire ejection nozzle in the current cell?", Ejection number information 7a in the nozzle direction is stored in the cell 1 column (the usable time nozzle number is 1, the end point nozzle number is 4, ), And obtains the number 1, 2, 3, and 4 of the used nozzle number. Next, the presence or absence of the used nozzle number in the non-discharge nozzle position information 8a is checked. In the case of the cell 1 column, it can be seen that the nozzle numbers 2 and 3 used are non-discharge nozzles. As a result, the process branches to "exist" and executes step S2.

(In the cell) is equal to or less than the total number of nozzles (in the cell)? &Quot; in the step S2,? And the step S3 is executed.

Injection number + injecting nozzle = 3 + 2 = 5> total number of nozzles = 4 (Equation 1)

(2) &quot; (2), &quot; 1 &quot; in the nozzle number 4, (1) in the nozzle number 1, and &quot; 2, and 3 are non-ejection (0), and the number of nozzles in the cell 1 column is finished. Next, step S4 is executed.

In step S4, "Complete all cells?", There are two rows of cells. Therefore, the flow branches to step S1 in order to jump to the generation of the nozzle discharge number data for the cell 2 column in the "next cell" in step S5.

In the case of the cell 2 column, the cell rows (5, 8, 3) and the non-discharge nozzle are six. Is applied to Expression 1, and in Step S2, the process branches to &quot; below &quot; and executes Step S6.

In step S6, &quot; make ejection data one by one from the ejection-enabled nozzles &quot;, one ejection (1) is performed in nozzle numbers 5, 7 and 8 and no ejection (0) The number of nozzles in cell 2 is allotted.

Next, step S4 is executed. In the step S4, in the case of the cell 2 row, the flow branches to the incomplete state and returns to the step S1 to move to the nozzle discharge number data generation for the cell 3 column in the &quot; next cell &quot;

In the case of the cell 3 column, since there is no cell 3 column (9, 12, 3) and no discharge nozzle, step S1 is branched to "none" and step S7 is executed.

In the "normal discharge number data generation" in step S7, the discharge number (1) is assigned to nozzles No. 9, 10 and 11 and the discharge number (0) is assigned to nozzle No. 12, and the number of nozzles in cell 3 is allotted. Next, step S4 is executed.

In step S4, in the case of the cell 3 column, since all three cells have been completed, the process branches to &quot; complete &quot;, and the generation of the nozzle discharge number data in the nozzle discharge number data generator 9 is terminated.

When the generation of the nozzle discharge number data in the nozzle discharge number data generator 9 is ended, the discharge number allocation information of the nozzle numbers 1 to 12 is outputted as the nozzle discharge number data, and the nozzle discharge number data retainer 10 And is stored as nozzle discharge number data 10a.

Since the scan direction ejection timing data 6a is stored in the scan direction ejection timing data retainer 6 and the nozzle ejection number data 10a is stored in the nozzle ejection number data retainer 10, And printing is performed.

<Printing start>

 3 (b), which is a condition of the N3 portion, at a printing speed of 200 mm / s.

The print data equivalent to the embodiment of the coated image 3 corresponding to this 300 ppi printing explained earlier is stored in the scan direction ejection timing data D2 before the movement stage 12, on which the substrate 11 is mounted, The retainer 6, and the nozzle ejection number data retainer 10, respectively.

When the moving stage 12 on which the substrate 11 is mounted starts moving in the column direction X at a stage scan speed of 200 mm / s (Vx), the moving stage 12 outputs position information made of a sinusoidal signal in a time series .

This positional information is input to the position detector 13, is arranged as a position information pulse, and is input to the ejection timing generator 14. [

The discharge timing generator 14 divides the inputted position information pulse based on the interval 6.7 占 퐉 (Px) of the preset scan direction discharge positions and outputs the data clear signal * CLR, A signal LD, and a clock signal CLKn for each nozzle. The load clock signal LD, which is the basic cycle of the ejection timing, becomes 30 kHz (Fn) = 0.033 ms (Tn) in terms of time intervals. The drive signal generator 15 generates three kinds of discharge drive signals from the discharge timing generator 14 on the basis of the load clock signal LD.

<Discharge Driving Waveform>

 The operation of the drive signal generator 15 will be described with reference to Fig.

9 shows the load clock signal LD input to the drive signal generator 15 and the three kinds of discharge drive signals 0, 1 and 2 (WB: 2 to 0) to be outputted. The discharge drive signal 0 (WB: 0) is a signal used when discharging is not performed, and is a waveform that keeps a constant direct current potential from the rise timing of the load clock signal LD to the rise timing of the next copper signal.

The load clock signal LD is a signal which is a basic cycle of the ejection timing.

The discharge drive signal 1 (WB: 1) is a signal used in the case of performing one ejection, and after the rise timing of the load clock signal LD is maintained at a constant DC potential, the potential is lowered after a prescribed time, This is a waveform that rises rapidly afterwards and returns to a constant DC potential.

The discharge driving signal 2 (WB: 2) is a signal used when two discharging operations are performed. After a lapse of one half of the load clock cycle Tn from the rising timing of the load clock signal LD, Which is the same signal as the drive signal 1.

1/2 of the present load clock cycle Tn is used, but it may be within one cycle. However, it is within a range that can be applied in the cell 1c.

These three kinds of discharge drive signals 0, 1, and 2 are repeatedly generated each time the load clock signal LD comes. This signal is input to the nozzle drive controller 17.

Depending on the liquid droplet number, the discharge drive signal 1 and the discharge drive signal 2 are used.

&Lt; Operation of discharge instruction data calculator 16 and nozzle drive controller 17 &gt;

 10 and 11 will be described until the drive waveform for each nozzle is output to the inkjet head 18 via the ejection instruction data calculator 16 and the nozzle drive controller 17. Fig.

10 is an electric circuit for one nozzle of the discharge instruction data calculator 16 and the nozzle drive controller 17. Fig. The discharge instruction data calculator 16 has AND gates 30a and 30b, D flip-flops 30c, 30e and 30f, and an OR gate 30d. The nozzle drive controller 17 has a NOR gate 30g and a drive waveform changeover switch 30h. In this example, since the ink jet head 18 has 12 nozzles, the number of the circuits in Fig. 10 is 12 in total.

Here, the AND gates 30a and 30b are logic multiplication elements whose outputs increase when all the input 2 signals are at the high level (H).

The OR gate 30d is an OR gate element whose output increases when one or both of the input 2 signals are at a high level (H).

The NOR gate 30g is a logical sum element of negative logic in which the output becomes high when one or both of the input 2 signals are at a low level (L).

The D flip-flops 30c, 30e and 30f hold the input signal D0 at the high level H and the low level L at the timing at which the clock signal CK rises from L to H in the D flip-flop , And outputs it to the output Q0. Holds the H level value and the L level value of the input signal D1 in the D flip-flop at the timing when the clock signal CK rises from L to H, and outputs it to the output Q1.

The holding continues until the rise of the next clock signal (CK). However, when the negative logic clear / CLR signal becomes the L level, the holding value becomes the L level, and the outputs (Q0, Q1) also become the L level.

A signal commonly input to all twelve nozzles is output from the nozzle discharge number data retainer 10 by a 2-bit discharge number signal TC: 1 to 0, a load clock signal LD from the discharge timing generator 14, 1 and 2 (WB: 2) from the drive signal generator 15, a data clear signal (* CLR: negative logic), a discharge timing signal TT from the scan direction discharge timing data retainer 6, ~ 0).

Signals input to and output from each nozzle correspond to a clock signal (CLKn: n = nozzle number) for each nozzle input from the ejection timing generator 14 and an n signal (WVn: n = nozzle number).

11 shows the relationship between the input TD value and the output: nozzle drive waveform WV of the nozzle drive controller 17 and the value of the control input Cn of the nozzle drive controller 17 to determine which waveform input WB ) Is selected and the waveform output WVn is obtained.

TT, TC, CLKn, LD, and * CLR are input signals to the discharge instruction data calculator 16, Cn are output signals from the discharge instruction data calculator 16, and input signals to the nozzle drive controller 17 . WB is an input signal to the nozzle drive controller 17, and the nozzle drive waveform WV is an output signal.

Using the above-described mechanism of the discharge instruction data calculator 16 and the nozzle drive controller 17, an ink discharge signal is sent to each nozzle, and ink is applied to each cell 1c.

In this example, when the nozzle to be supplemented is complementary to one nozzle, one nozzle is ejected with the same waveform as the ejection nozzle. In the case where the complementary nozzles are complementary in two, the same waveform as that of the ejection nozzles is ejected in two while shifting by 1/2 of the load clock cycle Tn. The average position in the scanning direction of the two ejection nozzles is set to be one ejection position of the ejection nozzles. However, even if the range of application in the cell 1c is three or more, It is preferable to set the discharge position.

&Lt; Spread of droplets discharged into the cell &

 Fig. 12 shows a state in which three nozzles are landed from the nozzle numbers 1 to 12 in the discharge position 1 in the column direction X. Fig.

12 (a) shows a planned position to be landed in three cells from nozzle numbers 1 to 12 in discharge position 1 in the column direction X. Black circles indicate landing, and white circles indicate no landing.

Figs. 12 (b) to 12 (i) are schematic diagrams showing the state of the landing into the cell at predetermined time intervals. Figs. 12 (e) to (g) show how droplets are landed in a cell corresponding to a large droplet when two droplets are continuously ejected from nozzle No. 1.

&Lt; Example of data change at the time of non-discharge nozzle change &gt;

 13 (a) to 13 (c) are diagrams for explaining the case where the non-discharge nozzles are changed from the nozzle numbers 2, 3 and 6 to the nozzle numbers 2, 3, 6, 8, 9, and 12, the nozzle discharge number data 10a is changed, and the nozzle drive waveform is selected to be 2/1 / non-discharge in the discharge instruction data calculator 16 (see FIG. 6) And is coated on the substrate 11.

13A shows a case in which 12 nozzles are used in total on the substrate 11 made of 3 x 3 cells and the cells in the row direction Y are used in the same manner as described in the printing example of Figs. , The total number of cells = 3, the cell 1 (the usable time nozzle number is 1, the end point nozzle number is 4, , And the print scan position is designated by the number of the row direction (Y) and the discharge timing in the column direction (X) for the discharge at positions 1, 5, and 9.

Fig. 13 (b) shows the state of nozzle discharge number data and the state of landing on the substrate when the non-discharge nozzles are nozzle numbers 2, 3, and 6. Fig. The non-discharge nozzles 2 and 3 are triple in the cell by ejecting the nozzle number 1 in two, and the non-ejection nozzles 6 are used as non-ejection nozzles in the cell.

13 (c) is a graph showing the relationship between the number of nozzles 8 and 9 in addition to the non-ejection nozzles in Fig. 13 (b) and the number of ejection nozzles in the case where the total ejection failures are 2, 3, 6, 8, And a state of landing on the substrate. The non-discharge nozzles 2 and 3 are supplemented three times in the cell by ejecting the nozzle number 1 in two, and the non-ejection nozzles 6 and 8 are supplemented three times in the cell by ejecting the nozzle number 7 in two, , And nozzle number 11 is duplicated in the cell three times.

As described above, even when the total number of injected liquid droplets required in the cell and the total number of non-discharge nozzles in the nozzles disposed in the cell exceeds the number of nozzles disposed in the cells, the ink is discharged twice from the discharge- It is possible to secure the adhered liquid droplet volume. Even when the number of non-discharge nozzles or the number of discharge nozzles changes, it is not necessary to update the entire application image data, and only the small-scale data of the discharge direction number information 4a in the scan direction and the discharge direction number information 7a in the nozzle direction are updated do. Therefore, even when the number of non-discharge nozzles is large, it is not necessary to prepare the data, and the ink can be discharged from the cell without ejecting the ink, It is possible to maintain the manufacturing efficiency of the device regardless of whether or not the occurrence of fire discharge is present.

In the above examples, the plurality of nozzles of the ink jet head 18 are arranged in a row in the row direction Y. However, as shown in Fig. 14, a plurality of nozzles arranged in the row direction Y Even when the nozzles are inclined in the column direction (X) and arranged in the oblique direction, the above method and apparatus can be used. In addition, the nozzles need not be a straight line in the row direction Y but may have a straight line shape in the row direction (Y). In both cases, the ejection timings are calculated assuming that the nozzles are arranged in a straight line in the row direction (Y), and the ejection timings are calculated by shifting the ejection timings in the column direction X in accordance with the positions of the nozzles, .

(Embodiment 2)

In the second embodiment, a case of ejecting onto different types of panels will be described. Items which are not described are the same as those of the first embodiment.

15 (a) is a plan view of the substrate 40 of the second type display panel in which the second embodiment is the object of the second embodiment. On the substrate 40, three small-sized display panels 41a to 41c are arranged on the left side, and a large-sized display panel 42 is arranged on the right side. In the small display panels 41a to 41c, a 2k panel of 300 ppi is arranged. In the large display panel 42, a 4k panel of 200 ppi is disposed. As a result, a cell 1c of 300 ppi and 200 ppi is placed in each panel area.

15B is a view showing the discharge of ink in the vertical direction (scanning direction, X direction) of each cell 1c of the small display panels 41a to 41c and the cells 1c of the large display panel 42 And the positional relationship between them.

In the cell 1c of the small display panel 41a, ink is ejected to the cell 1c of the large display panel 42 before one ejection cycle.

In the cell 1c of the small display panel 41b, the ink is ejected at the same ejection cycle as the cell 1c of the large-size display panel 42. [

In the cell 1c of the small display panel 41c, the cell 1c of the large display panel 42 is discharged after one discharge cycle.

Unlike the first embodiment, when the panel is changed, it is necessary to set the discharging condition to the cell in the meantime.

15 (c) is a schematic view showing a state in which a representative cell arrangement of two types of display panels deviating in the column direction (X) is cut out from a substrate 40 of a dual display panel, in order to facilitate description in Embodiment 2 And is a plan view of the substrate 43 of mixed cell. Three cells from the cell 1c at the head of the small display panel 41a and three cells from the cell 1c of the large display panel 42 are cut out and allocated to 12 nozzles.

16 is a conceptual diagram of an ink application device according to the second embodiment. Fig. 17 is a graph showing the relationship between the target dispensed image 3 in which ink ejection aimed at printing by the ink dispensing apparatus, that is, the dispensing position where printing is performed is expressed two-dimensionally, Information 8a, discharge number information 7a in the nozzle direction, and discharge timing map data 46a.

Figs. 16 and 17 correspond to Figs. 6 and 7 of the first embodiment, respectively.

The discharge timing map data 46a is different from the first embodiment. In the scan direction ejection timing data 6a in Fig. 6 of the first embodiment, one-dimensional data was obtained. On the other hand, in the second embodiment, the two-dimensional discharge timing map data 46a is used. This is because there are a plurality of kinds of panels of the object to be coated and there are different types of discharge timings. And is two-dimensional in order to specify at which position each discharge timing is used.

The ejection timing map data 46a is obtained by dividing the ejection candidate positions of the cell 1 and the cell 2 obtained by cutting out the representative cell arrangement of the two types of display panels which are deviated in the column direction X defined by Fig. 15 (c) .

The cell 1 has all three ejection timings and the intersecting coordinates of 1, 2, 3, and 4 in the row direction Y at the timing of 1, 5, and 9 in the column direction X are the ejection candidate positions do. The cell 2 has three ejection timings in all, and the intersecting coordinates of 7, 8, 9, 10, 11, and 12 in the row direction (Y) are ejected at the timing of 2, And becomes a candidate position.

The coated image 3 is composed of a two-dimensional coordinate system of the nozzle arrangement direction (row direction Y) and the scanning direction (column direction X). The lattice where the arrangement position of the nozzle and the discharge position cross each other is shown by a broken line. At the intersection, ink is ejected.

In this example, the ejection candidate position from the ejection timing map data 46a and the ejection number information 7a in the nozzle direction (the number of times the nozzle takes charge, the usable time point nozzle number, the end point nozzle number, Of the coated image 3).

In this example, the cell 1 has the nozzle number 1 at the time point nozzle, the nozzle number 4 at the end point nozzle, and the number of the injections into the cell is three. Therefore, the nozzles 1, 2, and 3 are the discharge positions in the columns 1, 5, and 9 in which the nozzle numbers 1 to 4 are the discharge candidate columns from the discharge timing map data 46a. Similarly, in the cell 2, the nozzle numbers 7, 8, 9, 10, and 11 are the ejection positions in the columns 2, 8, and 14.

Ejection nozzle positional information 8a described on the ejection number information 7a in the nozzle direction is a non-ejection nozzle in the present example in which the nozzle numbers 2, 3, 6, 8, 9 and 12 are used.

<Configuration of whole>

 16, the first embodiment differs from the first embodiment in that the timing data in the column direction X is changed from one-dimensional data to two-dimensional data. 6 is replaced with the scan direction ejection map information retainer 44 and the scan direction ejection timing data generator 5 shown in Fig. And the scan direction ejection timing data 6a and the scan direction ejection timing data 6a shown in Fig. 6 to the ejection timing map data retainer 46 and the ejection timing map data retainer 46, , And discharge timing map data 46a.

The scan direction discharge map information retainer 44 holds the column direction discharge timing for each cell as the total number of scans (the number of rows), the total number of cells, and discharge position information for each cell. In this example, the total number of scans is 14 (14 rows), all the cells are 2, the cell 1 is in the column direction 1, 5, 9, the row direction is 1 to 4, 8, 14, and 7 to 12 in the row direction.

The ejection timing map data generator 45 generates the ejection timing map data based on the scan position for each cell from the scan direction ejection map information holder 44 in the column direction X and the nozzle direction ejection number information (Scan position) and row (nozzle position) of the ejection candidate nozzle position for each cell from the nozzle 7, and outputs the ejection candidate pixel as map information.

The discharge timing map data retainer 46 holds the discharge candidate pixels from the discharge timing map data generator 45 as the discharge timing map data 46a.

Information on the scan position for each cell from the scan direction discharge map information retainer 44 and the discharge candidate nozzle position for each cell from the nozzle direction discharge number information section 7 in the nozzle direction are ANDed in rows and columns, And outputs the pixel as map information.

<Application Method>

 And operates in the same manner as in the first embodiment. The data corresponding to the application image 3 is set in the nozzle direction discharge number information section 7 in the nozzle direction and the discharge direction map information holder 44 in the scan direction prior to printing. Then, the non-discharge nozzle data portion 8 is set to the non-discharge nozzle position.

The ejection timing map data generator 45 stores the ejection candidate pixel as the ejection timing map data 46a in the ejection timing map data retainer 46. [ This storage may be performed only once, until the coated image 3 is changed.

In this example, when the non-discharge nozzle is nozzle numbers 2, 3, 6, 8, 9 and 12 as in the non-discharge nozzle positional information 8a in Fig. 17, the non-discharge discharge compensation is performed. As in the nozzle discharge number data 10a in Fig. 16, the nozzle numbers 1, 7, and 10 are calculated as 2, the nozzle numbers 4 and 11 are 1, respectively, and the other nozzles are calculated as no discharge.

At the time of printing, the discharge instruction data calculator 16 sends the discharge candidate scan position for each nozzle from the discharge timing map data retainer 46 and the discharge number per nozzle from the nozzle discharge number data retainer 10, The discharge number is selected at a different timing for each nozzle. As a result, the typical cell 1 of the small display panel and the representative cell 2 of the large display panel are each subjected to the non-discharge discharge compensation, and the cell 1 is discharged in three, and the cell 2 is discharged in five.

In the case where the non-discharge nozzle changes, only the non-discharge nozzle position information 8a to the non-discharge nozzle data portion 8 needs to be changed, so that the discharge timing map data 46a requiring time for rewriting does not need to be changed.

As described above, even when the total number of injected liquid droplets required in the cell and the total number of non-discharge nozzles in the nozzles disposed in the cells exceed the number of nozzles disposed in the cells, the discharged liquid can be discharged twice from the dischargeable nozzles, You can secure your opponent. Also, even when the number of non-discharge nozzles or the number of discharge nozzles changes, only the small-scale data of the discharge direction information in the nozzle direction need be updated without updating the entire application image data (discharge timing map data 46a). Therefore, even when the number of non-discharge nozzles is large, it is possible to land the specified number of droplets without leaving data from the discharge area without requiring data preparation time. Thus, the electronic devices having high- Can be provided while maintaining the manufacturing efficiency regardless of the occurrence of the non-discharge occurrence.

(overall)

It can be combined with Embodiments 1 and 2.

INDUSTRIAL APPLICABILITY The present invention can contribute to improvement of manufacturing efficiency of various high-resolution, high-quality displays and the like.

X: column direction Y: row direction
1: substrate 1a: liquid-repellent film
1b: bank 1c: cell
2: Projected droplet 2a: Discharge point of ink
2b: Non-stick opening of ink 2c: Non-stick opening
2d: discharge grating 3: coated image
4: scan direction ejection position information retainer 4a: scan direction ejection position information
5: scan direction ejection timing data generator
6: scan direction discharge timing data retainer
6a: scan direction ejection timing data
7: nozzle direction ejection number information section 7a: ejection number information in the nozzle direction
8: non-discharge nozzle data portion 8a: non-discharge nozzle position information
9: nozzle ejection number data generator 10: nozzle ejection number data retainer
10a: nozzle discharge number data 11:
12: Moving stage 13: Position detector
14: ejection timing generator 15: driving signal generator
16: discharge instruction data calculator 17: nozzle drive controller
18: inkjet head 21: ejection timing holding portion
22: control unit 25: fire ejection nozzle
30a: AND gate 30c: D flip flop
30d: OR gate 30h: changeover switch
40: Substrate 41a: Small display panel
41b: Small display panel 41c: Small display panel
42: large-sized display panel 43: substrate
44: scan direction ejection map information retainer 45: ejection timing map data generator
46: Discharge timing map data retainer 46a: Discharge timing map data
51: inkjet head 52: substrate
53a: cell 53b: cell
53c: cell CK: clock signal
Cn: Control input D0: Input signal
D1: Input signal EL: Organic
Q0: Output Q1: Output
WB: Waveform input WV: Nozzle drive waveform
WVn: Waveform output

Claims (7)

A head for ejecting ink from nozzles arranged in a plurality of straight lines,
A stage moving in a scanning direction relative to the head to hold an object to be coated,
A discharge timing holding section for outputting a discharge timing which is a reference to be applied to the cells of the object to be coated, on the basis of the application image showing the target application pattern for each nozzle;
A non-discharge nozzle data portion for storing the position of the non-discharge nozzle among the plurality of nozzles,
The number of the cells in the arrangement direction of the nozzles of the object to be coated and the number of the application start point nozzles and the number of the application end nozzles and the application number of the cells in the arrangement direction of the nozzles A nozzle direction ejection number information section for retaining nozzle direction ejection number information,
From the nozzle which can be applied to the same cell as the non-discharge nozzle, when the number of the nozzles for discharging the ink to the cell is insufficient, from the discharge timing, the position of the non-discharge nozzle, And a control section for driving the head so as to compensate for insufficient droplets for the non-discharge nozzle by discharging the ink plural times at the timing before and after the discharge without timing the discharge timing of the discharge nozzle. The method according to claim 1,
Wherein the control section instructs the cell to apply ink only once to the discharge timing when the nozzle is not short. The method according to claim 1,
Wherein the timing before and after the transfer is carried out within one cycle of the discharge timing. The method of claim 3,
Wherein said timing before and after said transfer is carried out at a half cycle of said discharge timing. The method according to claim 1,
In the discharge timing holding portion,
Wherein the plurality of types of ejection timings are the reference. The method of claim 5,
Wherein the plurality of types of ejection timings correspond to different kinds of objects to be coated. A head having a plurality of nozzles arranged in the row direction is relatively scanned in the column direction with respect to an object to be coated having a plurality of cells separated in the row direction and the column direction to eject ink from the nozzle to the cell As a method for coating,
Obtaining discharge number information in the nozzle direction indicating a coating time point nozzle number, a coating end point nozzle number, and a coating number for each cell in the row direction on the basis of the coating image for each nozzle representing the target coating pattern;
Which is required to discharge the non-discharge nozzle by the dischargeable nozzle without using the non-discharge nozzle, from the discharge number information in the nozzle direction and the non-discharge nozzle position information of the plurality of discharge nozzles in the nozzle A step of determining a nozzle,
In the case where the dischargeable nozzle for discharging the ink into the cell is insufficient, in the above-mentioned determination step, from the nozzle that can be discharged into the same cell as the discharge failure nozzle, at a position in the column direction different from the discharge timing of the other discharge nozzle And a supplementing step of driving the head so as to compensate for a deficient droplet of the deficient discharge portion.

Images