JP2015230860A - Method and apparatus of manufacturing organic el display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and apparatus for manufacturing an organic EL display panel that can solve a problem that dispersion of liquid droplets of a nozzle is reflected to dispersion of cells when an organic EL panel is coated according to a vertical coating method by an ink jetting method.SOLUTION: An ink coating method comprises: an arranging step of arranging, on one glass substrate, a first panel along one direction and a second panel which is along another direction and different from the first panel; and a coating step of simultaneously coating ink on the first panel and the second panel by using one ink jet head containing plural first nozzles for coating a first cell of the first panel, and plural second nozzles for coating a second cell of the second panel. In the coating step, a coating condition for plural first nozzles for the first cell is determined, then the difference between a coating amount of the plural first nozzles to the first cell and a target coating amount is determined, and the coating amount is increased or reduced so that the difference is nullified at one nozzle out of the first nozzles for coating one cell.

Description

  The present invention relates to a method for manufacturing an organic EL display panel using an inkjet apparatus, and more particularly to a volume adjustment method applied from nozzles of a plurality of inkjet heads.

  In recent years, a method of manufacturing an electronic device using an ink jet technique has attracted attention.

Manufacturing using inkjet technology is simpler and cheaper than equipment such as vapor deposition technology. In addition, since the inkjet technique is a direct patterning technique, a mask in the vapor deposition technique is not required and the size can be increased. For example, in display electronic devices, market demands for large screens have increased, and expectations for electronic device manufacturing technology by inkjet coating have increased.

  Hereinafter, a patterning method using the inkjet technique will be described with reference to FIG.

  FIG. 5 is a plan view of the ink jet apparatus. There are an inkjet head 20 and a substrate 10. There is a method in which an organic functional layer is formed by applying ink droplets containing an organic functional material from a nozzle 21 of an inkjet head 20 to a coloring region 12 surrounded by a bank 11 on a substrate 10 (for example, a patent) Reference 1). The inkjet head 20 applies ink to the color development region 12 while relatively moving in the direction of the arrow on the substrate 10.

The ink containing the organic functional material is applied to the color development region 12 arranged on the display substrate.
Here, the color development region means a region in which any one of red (R), green (G), and blue (B) subpixels is arranged in a line. That is, on the display substrate, three types of color development regions (R, G, B) are arranged in parallel to each other along a specific direction.

  When an organic functional layer is to be formed on a display substrate using an inkjet device, the following process is performed.

  (1) The ink jet head 20 of the ink jet apparatus is arranged at the upper part (or the lower part) in the figure with respect to the long axis of the color development region 12 defined by the bank 11 on the substrate 10. At this time, the arrangement is preferably made so that the long axis of the coloring region 12 and the arrangement direction of the nozzles 21 are perpendicular to each other.

  (2) The inkjet head 20 is relatively moved in parallel with the long axis of the coloring area 12.

  (3) A droplet is applied from the nozzle 21 to the coloring region 12 to form an organic functional layer.

  A method of moving the inkjet head 20 relative to the long axis of the color development region 12 in this manner is hereinafter referred to as “vertical coating”.

  However, as described above, the size of the liquid droplets applied from the nozzles 21 of the inkjet head 20 varies from nozzle 21 to nozzle 21. Therefore, when the substrate 10 is applied vertically, it is applied between the coloring regions 12. Variation occurs in the amount of ink applied.

  In particular, the case of variation will be described with reference to the plan view of FIG. FIG. 6 corresponds to FIG. When the inkjet head 20 has a nozzle 21a that does not apply ink, the amount of ink applied to the coloring area 12a is smaller than the amount of ink applied to the coloring area 12b. The variation in the amount of ink between the coloring regions 12a and 12b leads to the variation in the film thickness of the organic functional layer between the coloring regions 12a and 12b. Furthermore, the variation in the film thickness of the organic functional layer between the color development regions 12a and 12b leads to uneven brightness between the color development regions 12a and 12b, and causes so-called “straightness” in the organic EL display panel.

  As a method for solving the problem of “straight spot”, there is a method described in FIG. FIG. 7 is a plan view corresponding to FIGS. The inkjet head 20 in FIG. 7 includes a nozzle 21a that does not apply and a nozzle 21b that applies more ink.

  The application process is as follows.

  (1) The inkjet head 20 having a plurality of nozzles 21 is disposed on the side of the color development region of the substrate 10 with respect to the long axis.

  (2) The inkjet head 20 is relatively moved perpendicularly to the long axis of the coloring area 12.

  (3) An organic functional layer is formed by applying droplets of an organic functional material from the nozzle 21 to the coloring region 12.

  The method of moving the inkjet head 20 relative to the long axis of the coloring area 12 in this manner is hereinafter referred to as “horizontal coating”. In the horizontal coating, a larger amount of ink applied from the nozzles 21 is applied to the coloring area 12 than in the vertical coating of FIG.

  Thus, by applying by the horizontal coating method, it becomes possible to apply droplets with more nozzles 21 in one cell (coloring region 12). By applying droplets with a larger number of nozzles 21, variations in volume fluctuations of the droplets in the cell are alleviated.

  Even if there is a nozzle 21a that does not apply and a nozzle 21b that applies more ink, there is only one variation for nine nozzles. In addition, the application amount of the nozzles is adjusted in the initial stage, and the nozzles in the vicinity do not clog or apply much.

  In either case of “vertical coating” in FIG. 6 or “horizontal coating” in FIG. 7, the amount of droplets applied from the nozzles 21 of the inkjet head 20 in order to uniformize the amount of droplets hit in the cell. The method of adjusting in advance has been taken. For example, in Patent Document 2, switching between the selected nozzle group that is driven for drawing and the non-selected nozzle group that is not driven is performed, and the variation in the coating amount of the nozzles 21 in the nozzle group is applied to the coating amount data of each nozzle 21 in the nozzle group. Based on this, the color filter was formed by adjusting the coating amount for each nozzle.

  On the other hand, in the organic EL panel, the substrate size to be applied is increasing year by year, and the glass size is as follows. G1 glass substrate (400 mm × 300 mm), G2 glass substrate (470 mm × 370 mm), G3 glass substrate (650 mm × 550 mm), G4 glass substrate (880 mm × 680 mm), G5 glass substrate (1300 mm × 1100 mm), G6 glass substrate (1850 mm) × 1500 mm), G7.5 glass substrate (2250 mm × 1950 mm), G8 glass substrate (2500 mm × 2200 mm), and G10 glass substrate (2850 mm × 3050 mm).

  The organic EL panel is formed by forming a plurality of EL panels on one large glass substrate and then separating the organic EL elements.

  For example, the planar arrangement shown in FIG. On the substrate 32, three 65-inch panels 33 and two 55-inch panels 34 are arranged. By arranging in this way, the panel can be arranged on the substrate 32 without waste. The ink-jet head 36 is relatively moved in the direction 35 to apply ink to three 65-inch panels 33 and two 55-inch panels 34 simultaneously.

Here, when coating is performed with the inkjet head 36, coating in the direction 35 means that the vertical coating and the horizontal coating must be mixed.
Regarding horizontal coating, as shown in FIG. 7, even if the volume of droplets coming out from the nozzles 21 of the inkjet head 20 varies, the number of nozzles 21 that can be dropped into the cell is large. , The film thickness becomes uniform.

  However, as shown in FIG. 6, regarding the vertical coating, since the number of nozzles 21 is small, it is difficult to make the film thickness uniform after applying droplets and drying.

JP 2004-362818 A Japanese Patent No. 2967052

  As mentioned above, when the panel size is large and there are vertical and horizontal coated panels on the glass substrate, even if the volume applied from each nozzle is adjusted in the same way, There is a problem that the volume adjustment accuracy differs in the cells of the horizontal coating panel.

  An object of the present invention is to provide an organic EL panel having a uniform organic functional layer and a method for manufacturing the same even during vertical coating, which is more variable than horizontal coating.

  In order to solve the above-mentioned problems, a single glass substrate having a first panel along one direction and a second panel along the other direction unlike the first panel is applied to one first cell of the first panel. Ink is applied to the first panel and the second panel using one inkjet head including a plurality of first nozzles and a plurality of second nozzles applied to one second cell of the second panel. A first condition setting step for determining application conditions of the plurality of first nozzles to the first cell; a total amount of application by the plurality of first nozzles to the first cell; A first calculation step for obtaining a difference between the target application amount and a first adjustment for increasing or decreasing the application amount so that there is no difference in one first nozzle among a plurality of first nozzles applied to one cell. And manufacturing an organic EL display panel The law is used.

  Also, unlike the first panel, a holding unit that holds one glass substrate having a second panel along the other direction unlike the first panel, and one first cell of the first panel One ink jet head including a plurality of first nozzles to be applied and a plurality of second nozzles to be applied to one second cell of the second panel. A first condition setting unit that determines application conditions for a plurality of first nozzles, a first for obtaining a difference between a total of application amounts of the plurality of first nozzles to the first cell and a target application amount to the first cell. A device for manufacturing an organic EL display panel, comprising: a calculation unit; and a first adjustment unit that increases or decreases a coating amount so as to eliminate a difference in one of the plurality of first nozzles applied to one cell. Is used.

  The present invention is a method for adjusting the volume of droplets so that it can be uniformly applied even during vertical coating. That is, first, the amount of droplets applied from the nozzle is adjusted within a certain range. Next, by adjusting the volume of the entire cell to a certain amount with a certain nozzle in the cell, the volume in the cell can be made constant even during vertical coating. In this way, by changing the volume adjustment method between vertical coating and horizontal coating, the volume can be adjusted to be constant even when the number of nozzles applied during vertical coating is reduced.

The top view which shows the multiple types of panel in the inkjet apparatus of embodiment Top view showing droplets in a cell using inkjet vertical and horizontal coating methods The figure which shows the volume adjustment flow at the time of the vertical painting of embodiment Plan view when non-application occurs during vertical coating in the embodiment Plan view of a conventional ink jet device Plan view showing vertical coating with a conventional inkjet device Plan view showing horizontal coating by a conventional inkjet apparatus A plan view showing a plurality of types of panels in a conventional inkjet apparatus

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
FIG. 1 is a plan layout view when coating is performed by the inkjet head 36. In one inkjet head 36, a vertically-coated inkjet head nozzle group 37 and a horizontally-coated inkjet head nozzle group 38 for applying a horizontally-coated portion are separately provided. By doing in this way, it is because the volume from each nozzle group can be adjusted separately.

<Problems with "Vertical painting" and "Horizontal painting">
The reason why the difference between `` vertical coating '' and `` horizontal coating '' differs when the volume of droplets applied from the inkjet head is adjusted in the same way for the `` vertical coating '' and `` horizontal coating '' methods Will be described in detail.

  FIG. 2 is a plan view showing the relationship between the inkjet head 36 and the cells 43 and 44. 1 is an enlarged view of one cell of the 65-inch panel 33 and one cell of the 55-inch panel 34 in FIG. When applying to the cell 43 of the 65-inch panel 33 with the ink jet head 36 having a nozzle pitch of a certain interval, the nozzles 55, 56, 57, and 58 respectively use the droplet 45, the droplet 46, the droplet 47, and the liquid. Drops 48 are applied.

  The volume variation within each cell is calculated.

(1) In the case of cell 43
When coating with four different nozzles in the cell 43, the standard deviation of the entire coating variation is σ _mean , and the standard deviation of the coating variation of the four different nozzles is σ ₁ , σ ₂ , σ ₃ , σ ₄ .

σ ₁ ² + σ ₂ ² + σ ₃ ² + σ ₄ ² = σ _mean ² ( _Expression 1)
In (Equation 1), assuming that the application variation of each nozzle is equal,
σ ₁ = σ ₂ = σ ₃ = σ ₄ (Equation 2)
And
4σ ₁ ² = σ _mean ² (Expression 3)
Here, the variation of n% of the average value of standard deviations (where, n is 10 or less) is denoted by, the variation in each nozzle unit ^{_{σ 1 2 = σ mean 2/}} 4 ··· ( Equation 4)
σ ₁ = σ _mean / 2 ( _Expression 5)
Σ ₁ = n / 2. For example, when n = 3%, σ ₁ = 1.5%.

(2) In the case of the cell 44 Similarly, in the case of the cell 44, when applying with seven different nozzles,
σ ₁ ² + σ ₂ ² + σ ₃ ² + σ ₄ ² + σ ₅ ² + σ ₆ ² + σ ₇ ² = σ _mean ² ( _Equation 6)
Σ ₁ = n / √7. For example, when n = 3%, σ ₁ = 1.1%. That is, even if the volume of the nozzle is adjusted to the same level, it is possible to suppress variations by applying with a method having a large number of nozzles.

  For this reason, when the amount of ink applied from the nozzle changes, the level of variation differs between “vertical coating” and “horizontal coating”. In the case of the cell 43 having a small number of nozzles, the variation becomes large. There is a possibility of uneven brightness.

<Example>
Therefore, in the embodiment, a method for suppressing variation even when “vertical coating” and “horizontal coating” are performed simultaneously will be described below. Here, the inkjet head 36 is configured as shown in FIG. In other words, the inkjet head 36 has a configuration in which a vertically-coated inkjet head nozzle group 37 that is vertically coated from the longitudinal direction of the panel and a horizontally-coated inkjet head nozzle group 38 that is horizontally coated from the short direction of the panel are different. And

  By dividing the inkjet head 36 into the vertically coated inkjet head nozzle group 37 and the horizontally coated inkjet head nozzle group 38 in this way, the volume of each nozzle can be adjusted by different methods.

  When adjusting the volume from the nozzle of the inkjet head 36, it is possible to adjust the volume applied from each nozzle of the inkjet head 36 by changing the voltage of the portion related to application.

The reproducibility of the volume variation in the inkjet head 36 becomes a certain value or less. Here, it is considered that the horizontal coating is performed by n horizontal coating nozzles. That is, if the volume of the droplet applied from the target k-th nozzle (volume of application reproducibility) is V _k , and the volume amount ΔV _k varies depending on the application reproducibility, the adjusted droplet is measured. The volume V (k) can be represented by the sum of V _k and ΔV _k . Here, it is assumed that ΔV _k <V _k .
V (k) = ΔV _k + V _k (Expression 7)
The volume V _total of the droplets applied by n nozzles is
_Vtotal = V (1) + V (2) +. + V (k) +. + V (n)
= (ΔV ₀ + ΔV ₁ + • + ΔV _k + • + ΔV _m ) + (V ₁ + V ₂ + V ₃ + • + V _k + •• + V _n ) (Equation 8)
It becomes. When the volume in the cell is considered, the variation of the whole cell can be reduced by adjusting the volume with many nozzles.

However, when the total volume entering the cell is considered, an error (ΔV ₀ + ΔV ₁ + • + ΔV _k + • + ΔV _k ) occurs due to the reproducibility of each nozzle, and (V ₁ + V ₂ + V ₃ + • + V _k). The volume in the sum cell of (+ .. + V _n ) changes.

Therefore, in the vertical coating method, the number of nozzles less than n in the horizontal coating is applied with m. The volume when applied with m nozzles is
_Vtotal = V (1) + V (2) +. + V (k) +. + V (m)
= (ΔV ₀ + ΔV ₁ + • + ΔV _k + • + ΔV _m ) + (V ₁ + V ₂ + V ₃ + • + V _k + •• + V _m ) (Equation 9)
Can be written as: Since m is less than n, the influence of one variation on the whole is larger than horizontal coating.

  Therefore, once the application volume from each nozzle is adjusted, the volume is further adjusted by one nozzle applied to the cell in each cell.

  However, adjusting the volume amount with any one nozzle when the target volume of the determined cell is fixed, the volume adjustment amount can be greatly changed by the certain nozzle, and the volume It is easy to change the amount of change greatly.

Therefore, the volume is adjusted with only one nozzle applied to the same cell with respect to the target volume. If the target cell volume is V _target , the volume entering the cell is V _total , and the difference is ΔV _cell ,
ΔV _cell = V _target −V _total ( _Equation 10)
It becomes. In order to adjust this ΔV _cell , the k-th nozzle volume V (k) that is one nozzle is the actual nozzle volume V (k with the reproducibility of the k-th nozzle as ΔV _k and the adjusted volume Vk. ) ′ To which ΔV _cell is added to control the volume in the entire cell to be close to a certain target value.

That is, the adjustment amount of ink is generated at the k-th nozzle.
V (k) ′ = (ΔV _k + V _k ) + ΔV _cell (Equation 11)
By controlling in this way,
V _target ≈ V _total ( _Expression 12)
Thus, even in the case of vertical coating, it is possible to improve the volume adjustment accuracy by adjusting the volume of the entire cell.

<Overall process>
The overall process is described below. Make the following adjustments with the vertical nozzle. The volume adjustment step is shown in FIG.

  (1) First, application conditions to be applied to the cell are determined (condition setting step).

  (2) Next, the difference between the target application amount to the cell and the actual application amount to the cell is calculated (calculation step).

  (3) The application amount is increased or decreased by using one of the nozzles applied to the cell so that the above difference is eliminated (adjustment process).

In (1), which nozzle is applied to one cell is determined.
In (2), the difference between the coating amount required for the cell and the coating amount when applied by the nozzle determined in (1) is obtained.
In (3), the coating amount of one nozzle is determined so that the difference is eliminated.

  That is, the volume is adjusted so that the volume is constant with one nozzle applied to the cell in the cell.

  Here, the volume adjustment is performed using a single nozzle. However, when the volume is increased, control is performed using a nozzle near the center. When reducing the volume, it is preferable to use a nozzle near the end. This is because applying a large droplet near the center tends to form the same droplet shape in the cell, and drying unevenness can be suppressed.

  Here, the nozzle in the vicinity of the center is a nozzle that applies from the center position of the cell to a half area from the center position of the cell to the end of the cell. The coating nozzle is located in the center of the cell and half the area of the cell.

  On the other hand, the nozzle at the end is a nozzle that is located outside the vicinity of the center and that applies the end of the cell.

  Further, before (2), the application amount of each nozzle may be adjusted to be uniform. Or you may calculate using the application amount of each nozzle before, without adjusting. Or you may apply | coat and obtain | require the application amount from each nozzle, and may use the value.

In the cell 43 of FIG. 2, in the vertically coated inkjet head, the cell is applied to the cell 43 with four nozzles, and is applied with the droplet 45, the droplet 46, the droplet 47, and the droplet 48. On the other hand, in the case of horizontal coating, similarly, a plurality of droplets are applied to the cells 44 by the horizontal coating inkjet head group. Considering vertical painting in the cell 43, the following equation 13 is obtained.
V _total = (ΔV ₁ + ΔV ₂ + ΔV ₃ + ΔV ₄ ) + (V ₁ + V ₂ + V ₃ + V ₄ ) (Equation 13)
Therefore, the target volume in the cell and the actual volume difference are expressed by Equation 14.
ΔV _cell = V _target −V _total ( _Expression 14)
When the value of ΔV _cell is a negative value, it is necessary to increase the value of Vtotal. When the amount of droplets is increased, the volume is increased by a nozzle near the center. That is, the droplet 46 or the droplet 47 is increased.

When ΔV _cell is a positive value, the volume is reduced by the nozzles near both ends. That is, the number of droplets 45 or droplets 48 is reduced.

  The reason for this is that the amount of ink applied to the center of the cell tends to spread throughout the cell, and may be increased. This is because the number of droplets applied to the cell edge is difficult to spread over the entire cell, and is therefore small.

  In this example, the volume is adjusted with one representative nozzle, but the volume may be adjusted with a nozzle in a plurality of cells. That is, both the increase of the central droplet and the decrease of the droplets at both ends may be combined.

  As a result, it is possible to apply to a plurality of types of panels at the same time with an inkjet head including the vertically coated inkjet head nozzle group 37 and the laterally coated inkjet head nozzle group 38.

  In particular, when a plurality of types of cells are on the same substrate 32 and are applied simultaneously, it is effective to adjust with one nozzle as described above. This is because it is difficult to match the coating amount as a whole because the coating conditions vary greatly.

  Further, this adjustment method may be similarly performed for the horizontal coating. However, for simplicity, it is preferable not to make this adjustment for horizontal coating. In this case, in the horizontal coating, only the coating conditions to be applied to the cells of (1) are determined, and the other (2) and (3) are not performed.

  If this adjustment is not performed for the horizontal coating, the adjustment reference is changed within one ink jet head, which is complicated. However, the adjustment can be simplified.

(Embodiment 2)
The second embodiment is different from the first embodiment in the manner of nozzle adjustment. In this embodiment, the number of coatings is performed a plurality of times instead of changing the coating amount of the nozzles. Other matters not described are the same as those in the first embodiment.

  A method according to the second embodiment will be described. FIG. 4 is a plan layout view of the cell 50 obtained by enlarging one cell of the 65-inch panel 33 of FIG.

  In the cell 50, the respective droplets 51, 552, 53 and 54 applied from the nozzles 55, 56, 57 and 58 are shown. However, this indicates that the droplet 53 is not applied, and the nozzle 57 for applying the droplet 53 is not applied.

When the nozzle is not uncoated, the volume in the cell 50 is as shown in Equation 8 above. Here, when the third nozzle 57 is not applied, it is desirable to adjust the volume with a nozzle in a cell near the center. At this time, the volume V _total 'in the cell can be expressed as follows.
V _total '= (ΔV ₁ + ΔV ₂ + ΔV ₃ + ΔV ₄ ) + (V ₁ + V ₂ + V ₃ + V ₄ ) (Equation 15)
V _total '= V _total −ΔV ₃ −V ₃ (Equation 16)
It can be expressed as. On the other hand, the difference ΔV _cell ′ between the target value V _target of the cell volume and the actual cell volume V _total ′ is as follows.
ΔV _cell ′ = V _target −V _total ′ ( _Expression 17)
Expression 16 is substituted into Expression 17.
ΔV _cell ′ = V _target − (V _total −ΔV ₃ −V ₃ ) = ΔV _cell + ΔV ₄ + V ₄ (Equation 18)
Here, ΔV ₃ is a reproducibility error. When the third nozzle 57 becomes uncoated, the volume in the cell can be brought close to the target volume by hitting the second nozzle twice and performing volume adjustment V ₂ ′ with the nozzle hit twice. It becomes possible. In this embodiment, the application amount is adjusted by the number of times without adjusting the application amount. As a result, from Equation 18, the following is obtained.
V ₂ ′ = V (2) + (ΔV _cell + V ₃ ) / 2 (Equation 19)
As shown in FIG. 4, when the liquid droplet 51, the liquid droplet 52, and the liquid droplet 54 are applied to the cell 50 and the nozzle 57 of the liquid droplet 53 is not applied, the nozzle 56 strikes twice. Do.

In addition, since the nozzle 56 of the droplet 52 performs twice, the target volume is adjusted as (V ₂ + ΔV / 2). Here, it is assumed that ΔV> 0.

  The amount can be adjusted more accurately by increasing the number of times of application than by increasing the amount of application at one time. This is because the proportional relationship between the applied voltage and the coating amount varies.

<Notes>
In the embodiment, as shown in FIG. 1, ink is applied to different types of panels by the vertically-coated inkjet head nozzle group 37 and the horizontally-coated inkjet head nozzle group 38. However, you may apply | coat to the same kind of panel by the method similar to the above.

  Embodiments 1 and 2 can be combined.

  Moreover, the said method can be used for the following ink application apparatuses. Unlike the first panel, a first panel along one direction and a second panel along the other direction, a holding unit that holds one glass substrate, and a plurality of coatings applied to one first cell of the first panel A plurality of second nozzles that apply to one second cell of the second panel, and an ink application apparatus that includes the plurality of second nozzles that apply to one second cell of the second panel, A first condition setting unit for determining a coating condition of the first nozzle, and a first calculation unit for calculating a difference between a total coating amount of the plurality of first nozzles applied to the first cell and a target coating amount applied to the first cell. And a first adjustment unit that increases / decreases the application amount so that there is no difference in one first nozzle among the plurality of first nozzles applied to one cell.

  The above embodiment has been described on the premise of a manufacturing method and a manufacturing apparatus of an organic EL display panel. However, it is used in other devices as well.

  In addition to the organic EL display, the display can be generally used. Furthermore, it can be used not only for displays but also for applying ink to cells using inkjet.

DESCRIPTION OF SYMBOLS 10 Substrate 11 Bank 12 Color development area 12a Color development area 12b Color development area 20 Inkjet head 21 Nozzle 21a, 21b Nozzle 32 Substrate 33 65 inch panel 34 55 inch panel 35 Direction 36 Inkjet head 37 Vertically coated inkjet head nozzle group 38 Horizontally coated inkjet head nozzle Group 43 cell 44 cell 45 droplet 46 droplet 47 droplet 48 droplet 50 cell 51, 52, 53, 54 droplet 55, 56, 57, 58 nozzle

Claims (7)

A single glass substrate having a first panel along one direction and a second panel along the other direction, unlike the first panel,
Using one inkjet head including a plurality of first nozzles applied to one first cell of the first panel and a plurality of second nozzles applied to one second cell of the second panel,
A method of applying ink to the first panel and the second panel,
A first condition setting step for determining application conditions of the plurality of first nozzles to the first cell;
A first calculation step for obtaining a difference between a total amount of application by the plurality of first nozzles to the first cell and a target application amount to the first cell;
A first adjustment step of increasing or decreasing the coating amount so as to eliminate the difference in one of the plurality of first nozzles applied to the one cell;
The manufacturing method of the organic electroluminescent display panel containing this. A second condition setting step for determining application conditions of the plurality of second nozzles to the second cell;
A second calculation step of obtaining a difference between a total amount of the plurality of second nozzles applied to the second cell and a target amount applied to the second cell;
A second adjustment step of increasing or decreasing the coating amount so that the difference is eliminated in one second nozzle among the plurality of second nozzles applied to the two cells;
The method for producing an organic EL display panel according to claim 1, further comprising: A second condition setting step for determining application conditions of the plurality of second nozzles to the second cell,
The second calculation step for obtaining the difference between the total amount of application by the plurality of second nozzles to the second cell and the target application amount to the second cell is not included,
Of the plurality of second nozzles applied to the two cells, one second nozzle does not include a second adjustment step for increasing or decreasing the application amount so that the difference is eliminated.
The manufacturing method of the organic electroluminescent display panel of Claim 1. In the first adjustment step of increasing or decreasing the coating amount,
Reducing the amount of ink applied to the first nozzle that applies ink to the end portion of the first cell among the plurality of first nozzles that apply the ink to one first cell; or
Increasing the ink application amount of the first nozzle that applies ink to the central portion of the first cell among the plurality of first nozzles that apply the ink to one first cell;
The manufacturing method of the organic electroluminescent display panel of Claim 1. The central portion of the first cell is a half region from the central position of the first cell to the end of the first cell;
5. The method of manufacturing an organic EL display panel according to claim 4, wherein the end portion of the first cell is a portion other than a central portion of the first cell in the first cell. In the first adjustment step of increasing or decreasing the coating amount,
The method for manufacturing an organic EL display panel according to claim 1, wherein the number of times of ink application of the plurality of first nozzles that apply the ink to one of the first cells is increased. Unlike the first panel, a first panel along one direction, and a holding unit that holds one glass substrate having a second panel along the other direction;
One inkjet head including a plurality of first nozzles that apply to one first cell of the first panel and a plurality of second nozzles that apply to one second cell of the second panel. An ink application device,
A first condition setting unit for determining application conditions of the plurality of first nozzles to the first cell;
A first calculation unit for obtaining a difference between a total amount of application by the plurality of first nozzles to the first cell and a target application amount to the first cell;
An apparatus for manufacturing an organic EL display panel, comprising: a first adjustment unit that increases or decreases a coating amount so as to eliminate the difference in one of the plurality of first nozzles applied to the one cell.

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