JP2010243532A - Droplet discharge device, droplet discharge method, and method for fabricating color filter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a droplet discharge device excelling in production efficiency for suppressing deterioration of image quality, by making streak irregularity non-prominent, and to provide a droplet discharge method and a method for fabricating a color filter. <P>SOLUTION: The droplet discharge device includes: a droplet discharge head 5, having a plurality of nozzles and a plurality of drive elements; a supply reel 12 for supplying a sheet member 15; a winding reel 13 for winding the sheet member 15; an imaging device 14 for photographing images of a discharged functional liquid; an analyzing means 32 for image-treating images photographed with an imaging device 14, measuring an impact area on the sheet member 15 of the functional liquid, and obtaining distribution of a discharge amount of the functional liquid discharged from the plurality of the nozzles; and a control means 31 for regulating, from the distribution, a voltage applied on the plurality of the drive elements so that the discharge amount in the plurality of the nozzles approximates a prescribed proper amount. The sheet member 15 includes a sheet base material; a partition layer, having a plurality of openings larger than an impact diameter of the functional liquid; and ink receiving layers provided in each opening. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a droplet discharge device, a droplet discharge method, and a color filter manufacturing method.

  2. Description of the Related Art In recent years, electro-optical devices such as liquid crystal devices and organic EL (Electro-Luminescent) devices have been used for display units of electronic devices such as mobile phones and portable computers. These electro-optical devices generally perform full color display. For example, full color display by a liquid crystal device is displayed by passing light modulated by a liquid crystal layer through a color filter. Such a color filter is formed by ejecting ink on the surface of a substrate in a dot shape by a film forming technique using a droplet discharge method.

  By the way, in the film forming technique using the droplet discharge method, the ink discharge amounts of the plurality of nozzles vary slightly. When the ink is drawn with variations in the ink discharge amount, streaky shading unevenness (straight unevenness) may occur in the color filter. Such uneven stripes are easily visible, and the image quality displayed through the color filter may be degraded.

  A technique for solving such a problem has been studied. For example, in Patent Document 1, a medium to be colored is colored with a plurality of different ink discharge densities, and the color density of the colored portion is measured to obtain a plurality of colors. The relationship between the color density of each colored portion colored with a different ink discharge density and the corresponding ink discharge density is calculated. Based on this relationship, a reduction in the image quality of the display image is suppressed by correcting the ink discharge density to obtain a desired color density.

JP-A-10-260306

  In Patent Document 1, the color density of each colored portion colored with different ink discharge densities is represented by the absorbance of the colored portion of the medium to be colored. If an error occurs during the measurement of the absorbance, correction with high accuracy cannot be performed, and it may be difficult to suppress deterioration in image quality.

  On the other hand, a method of measuring the weight of ink ejected from a plurality of nozzles is conventionally used. However, measuring the weight of the ink is not preferable in terms of mass production because it is not easy to measure and requires a large number of man-hours, and is inferior in production efficiency.

  Further, in the film forming technique using the droplet discharge method, when drawing using ink discharged from a plurality of nozzles, a predetermined amount (for example, 30 to 70 ng) of ink is discharged for each dot formation. The For this reason, the ejected ink wets and spreads, and enters the ink landing area at the adjacent position, resulting in variations in the ink landing area.

  The present invention has been made in view of such circumstances, and it is possible to suppress deterioration in image quality by making stripes inconspicuous, and further, a droplet discharge device, a droplet discharge method, and It is an object to provide a method for producing a color filter.

  In order to solve the above problems, a droplet discharge apparatus according to the present invention includes a plurality of nozzles that discharge a functional liquid and a plurality of drive elements that are provided corresponding to the plurality of nozzles. A supply reel that supplies a sheet member on which the functional liquid ejected from the plurality of nozzles is landed, a take-up reel that winds up the sheet member supplied from the supply reel, the supply reel, and the winding An imaging device that captures an image of the functional liquid ejected from the plurality of nozzles with respect to the sheet member between the take-up reel and the image of the functional fluid that is image-processed by the image processing performed by the imaging device. Analyzing means for measuring a landing area on the sheet member and obtaining a distribution of the discharge amount of the functional liquid discharged from the plurality of nozzles, and the discharge amount at the plurality of nozzles from the distribution Control means for adjusting a voltage applied to the plurality of drive elements so as to approach a fixed appropriate amount, and the sheet member includes a sheet base material and the functional liquid provided on the sheet base material A partition layer having a plurality of openings having an opening interval larger than the landing diameter of the ink, and a porous ink receiving layer in which a pigment provided in each opening of the partition layer is bound with a binder. Features.

  According to this configuration, an image in which ink (functional liquid) ejected from a plurality of nozzles is landed on the sheet member by the imaging device is photographed. Then, the distribution of the ejection amount of the ink ejected from the plurality of nozzles is obtained based on the landing area of the ink ejected from the plurality of nozzles by the analyzing means. Then, the voltage applied to the drive element is adjusted by the control means so that the ink discharge amount at the plurality of nozzles approaches a predetermined appropriate amount. That is, the variation in the ink discharge amount at the plurality of nozzles is corrected by the control means. For this reason, a uniform amount of ink can be ejected from all nozzles of the droplet ejection head. In addition, the sheet member is provided with a partition layer having a plurality of openings with opening intervals larger than the ink landing diameter. For this reason, when drawing is performed by ejecting ink from a plurality of nozzles, even if a predetermined amount (for example, 30 to 70 ng) of ink is ejected for each dot formation, the inside of the plurality of openings provided in the partition wall layer By landing the ink on the ink, it is possible to prevent the discharged ink from spreading and entering the ink landing area at the adjacent position. As a result, a partition layer having a plurality of openings with an opening interval larger than the ink landing diameter is provided in the measurement region that contributes to image display, so that the ink landing area is uniform for all nozzles of the droplet discharge head. Can be realized. Accordingly, it is possible to suppress the deterioration of the image quality by making the stripes inconspicuous. Further, ink is landed in a plurality of openings of a partition wall layer provided in a measurement region on a sheet base material constituting the sheet member, and is ejected from a plurality of nozzles based on an ink landing area in the plurality of nozzles. The method for obtaining the distribution of the amount of ink discharged is superior in production efficiency because it does not require an enormous man-hour as compared with the conventional method for measuring the weight of ink ejected from a plurality of nozzles. In addition, since the sheet member on which the ink ejected from the plurality of nozzles has landed is appropriately conveyed, the landing area can be measured efficiently.

In the droplet discharge device, the height of the partition wall layer may be higher than the height of the ink receiving layer.
According to this configuration, when ink is drawn from a plurality of nozzles for drawing, even if a predetermined amount (for example, 30 to 70 ng) of ink is ejected for each dot formation, the height of the ink receiving layer is higher. By landing the ink in the plurality of openings of the high partition layer, the discharged ink is greatly prevented from getting wet and spreading into the ink landing area at the adjacent position. As a result, in the measurement region that contributes to the display of the image, it is possible to remarkably uniform the ink landing area at all the nozzles of the droplet discharge head.

The droplet discharge method of the present invention is a droplet discharge method using a droplet discharge head having a plurality of nozzles for discharging a functional liquid and a plurality of drive elements provided corresponding to the plurality of nozzles. A first landing step of landing the functional liquid on the sheet member; and a first landing area of the functional liquid landed on the sheet member after the first landing step; A first analysis step of obtaining a distribution of the discharge amount of the functional liquid discharged from the nozzle, and a voltage applied to the plurality of drive elements so that the discharge amount at the plurality of nozzles approaches a predetermined appropriate amount from the distribution The sheet member has a plurality of openings having a larger opening interval than the landing diameter of the functional liquid provided on the sheet substrate. Partition wall and each opening of the partition layer A porous ink receiving layer in which a pigment provided inside is bound with a binder, and in the first landing step, the functional liquid is landed in each opening of the partition wall layer of the sheet member. It is characterized by.
According to this manufacturing method, since ink is landed in each opening of the partition wall layer on the sheet base material constituting the sheet member by the first landing step, the discharged ink spreads out and the ink at the adjacent position is spread. Intrusion into the landing area is prevented. Thereby, the variation of the ink landing area in each opening of the partition wall layer of the sheet member is reduced. Then, the distribution of the ink discharge amount at the plurality of nozzles is obtained by the first analysis step after the first landing step. In the first control step, the ink discharge amount at the plurality of nozzles is adjusted to approach a predetermined appropriate amount. As a result, the variation in the ink discharge amount among the plurality of nozzles is corrected. For this reason, it is possible to discharge a uniform amount of ink from all the nozzles of the droplet discharge head and make the ink landing area uniform in all the nozzles. Accordingly, it is possible to suppress the deterioration of the image quality by making the stripes inconspicuous.

In the droplet discharge method, after the first control step, after the second landing step of landing the functional liquid in each opening of the partition layer of the sheet member, and after the second landing step, A second analysis step of measuring a second landing area of the functional liquid landed in each opening of the partition layer of the sheet member and obtaining a distribution of the discharge amount of the functional liquid discharged from the plurality of nozzles; It is desirable to have at least one second control step of adjusting a voltage applied to the plurality of drive elements so that the discharge amount from the plurality of nozzles approaches a predetermined appropriate amount from the distribution.
According to this manufacturing method, after the first control step, the landing step, the analysis step, and the control step are repeated a plurality of times, so that the variation in the ink discharge amount of the plurality of nozzles and the landing area of the plurality of nozzles can be reduced. Variations are reliably adjusted. For this reason, it is possible to discharge a substantially uniform amount of ink from all the nozzles of the droplet discharge head, and to make the ink landing area in all the nozzles extremely uniform. Therefore, it is possible to make the unevenness more inconspicuous and to suppress the deterioration of the image quality.

The method for producing a color filter of the present invention is characterized in that the functional liquid is disposed in a predetermined region provided on a base material to form a color filter using the droplet discharge method described above.
According to this manufacturing method, as described above, a uniform amount of ink is ejected from all nozzles of the droplet ejection head, and the landed area of ink at all nozzles is made uniform. Color filters can be manufactured.

It is a schematic diagram which shows schematic structure of the droplet discharge apparatus of this invention. It is a schematic diagram which shows schematic structure of a droplet discharge head. It is explanatory drawing of the method of forming a color filter on a color filter board | substrate. It is a flowchart which shows the process of a droplet discharge method. It is a figure which shows the state of the ink receiving layer of the sheet | seat member surface before and behind moisture permeation. It is a figure which shows the arrangement | positioning state of the ink before and behind the correction | amendment of the landing area dispersion | variation. It is a figure which shows the arrangement | positioning state of the ink in the measurement area | region of this invention. It is a figure which shows the discharge characteristic of the droplet discharge head before and after dispersion | variation correction | amendment of an ink discharge amount.

  Embodiments of the present invention will be described below with reference to the drawings. This embodiment shows one aspect of the present invention, and does not limit the present invention, and can be arbitrarily changed within the scope of the technical idea of the present invention. Moreover, in the following drawings, in order to make each structure easy to understand, an actual structure and a scale, a number, and the like in each structure are different.

  In the following description, the XYZ rectangular coordinate system shown in FIG. 1 is set, and each member will be described with reference to this XYZ rectangular coordinate system. In the XYZ orthogonal coordinate system, the X axis and the Y axis are set in a direction parallel to the work stage 16, and the Z axis is set in a direction orthogonal to the work stage 16. In the XYZ coordinate system in FIG. 1, the XY plane is actually set to a plane parallel to the horizontal plane, and the Z axis is set to the vertically upward direction.

(Droplet discharge device)
FIG. 1 is a schematic diagram showing a schematic configuration of a droplet discharge device 1 according to the present invention. The droplet discharge device 1 is a device that forms a color filter layer by discharging droplets of a color filter material (functional liquid) onto a predetermined region of a color filter substrate (base material) P by, for example, an inkjet method. The droplet discharge device 1 also performs the droplet discharge method of the present invention.

  The droplet discharge device 1 includes a work stage 16, a droplet discharge head 5, a tube 44, a tank 33, a sheet member transport table 11, a supply reel 12, a take-up reel 13, an area measurement camera (imaging device) 14, and a control unit. (Control means) 31, analysis unit (analysis means) 32, first wiring 41, second wiring 42, and third wiring 43 are provided.

  The work stage 16 is installed so as to be movable in the X-axis direction by a stage moving device (not shown). The work stage 16 holds the color filter substrate P transported from a transport apparatus (not shown) on the XY plane by a vacuum suction mechanism (not shown).

  The droplet discharge head 5 is electrically connected to the control unit 31 via the first wiring 41. The droplet discharge head 5 has a plurality of nozzles N (see FIG. 2), and discharges droplets of color filter material based on drawing data and drive control signals input from the control unit 31. The droplet discharge heads 5 are provided corresponding to the color filter materials R (red), G (green), and B (blue). The droplet discharge head 5 is connected to the tank 33 via a tube 44.

  The droplet discharge head 5 includes a bearing mechanism (not shown) such as a pole screw or a linear guide in the Y-axis direction and the Z-axis direction. The droplet discharge head 5 is movable in the Y-axis direction and the Z-axis direction based on the position control signal indicating the Y coordinate and the Z coordinate input from the control unit 31.

  The tube 44 is a tube for supplying a color filter material that connects the tank 33 and the droplet discharge head 5. The tank 33 stores three color filter materials: a color filter material for R (red), a color filter material for G (green), and a color filter material for B (blue). The tank 33 stores the color filter materials of three colors and supplies the color filter materials to the droplet discharge heads 5 corresponding to the three colors via the tubes 44.

  The sheet member transport table 11 is movable in the X-axis direction by a transport table moving device (not shown). The sheet member conveying table 11 is a conveying table for the sheet member 15 that conveys the belt-shaped sheet member 15 supplied from the supply reel 12. The sheet member 15 supplied from the supply reel 12 is taken up by the take-up reel 13.

  The sheet member 15 is a recording medium on which dot-shaped landing areas of ink (functional liquid) ejected from a plurality of nozzles N of the droplet ejection head 5 can be recorded. The sheet member 15 is partitioned into a measurement area Ta where ink is landed at a predetermined interval and a dummy area Tb provided outside the measurement area Ta and where ink is discarded. Here, the measurement region Ta is a region corresponding to a color filter layer CF for each pixel PX, which will be described later, and is a region contributing to display. The dummy area Tb is an area that does not contribute to the display provided adjacent to the measurement area Ta. This dummy area Tb is also an area for discharging a plurality of drops of ink and discarding them for a while from the start of drawing where the ink discharge amount is unstable until the ink discharge amount becomes stable.

  As the sheet member 15, for example, recording paper such as roll paper can be used. In addition, as the sheet member 15, a substrate having water repellency such as a glass substrate can be used instead of the roll paper. Further, as the other sheet member 15, for example, a sheet provided with an ink receiving layer on a sheet base material such as paper or a plastic film can be used.

  In the present embodiment, as the sheet member 15, a sheet having a partition layer having a plurality of openings in a measurement region Ta on a plastic film (sheet base material) and having an ink receiving layer in the plurality of openings is used ( (See FIG. 7). The ink receiving layer will be described later (see FIG. 5).

  Further, the sheet member 15 may be used for confirming the discharge state (nozzle omission and bending) of the plurality of nozzles N of the droplet discharge head 5 before production, that is, before drawing on the color filter substrate P. is there.

  The area measuring camera 14 is disposed at a position facing the recording surface (upper surface) of the sheet member 15 on the sheet member conveying table 11. The area measurement camera 14 is a camera that photographs the landing area of the ink ejected from the plurality of nozzles N to the measurement area Ta of the sheet member 15. The area measurement camera 14 is electrically connected to the analysis unit 32 via the second wiring 42. The area measurement camera 14 outputs image data of the shot ink landing area to the analysis unit 32.

  The analysis unit 32 measures the landing area by image processing the ink landing area image data photographed by the area measurement camera 14, and discharges ink from the plurality of nozzles N based on the obtained landing area measurement data. It has a function for obtaining a distribution of quantities. The analysis unit 32 is electrically connected to the control unit 31 via the third wiring 43. The analysis unit 32 outputs the measurement data of the ink discharge amount distribution at the plurality of nozzles N to the control unit 31.

  The control unit 31 adjusts the voltage to be applied to the drive element PZ (see FIG. 2) based on the measurement data of the ink discharge amount at the plurality of nozzles N input from the analysis unit 32. Specifically, the control unit 31 adjusts the voltage applied to the drive element PZ so that the ink discharge amount from the plurality of nozzles N approaches a predetermined appropriate amount. Then, the variation in the ink discharge amount of the plurality of nozzles N is adjusted by the drive element PZ. That is, the variation in the ink discharge amount among the plurality of nozzles N is corrected.

  After the variation in the ink discharge amount at the plurality of nozzles N is corrected, the droplets of the color filter material are discharged from the plurality of nozzles N of the droplet discharge head 5 to a predetermined position on the color filter substrate P.

  FIG. 2 is a schematic diagram showing a schematic configuration of the droplet discharge head 5. 2A is a plan view of the droplet discharge head 5 viewed from the work stage 16, FIG. 2B is a partial perspective view of the droplet discharge head 5, and FIG. It is a fragmentary sectional view of 1 nozzle.

As shown in FIG. 2A, the droplet discharge head 5 includes a plurality of (for example, 180) nozzles N _{1 to} N ₁₈₀ arranged in the Y-axis direction. A nozzle row NA is formed by the nozzles N _{1 to} N ₁₈₀ . Although FIG. 2A shows one row of nozzles, the number of nozzles and the number of nozzle rows provided in the droplet discharge head 5 can be arbitrarily changed, and the nozzles for one row arranged in the Y-axis direction are arranged as X. A plurality of rows may be provided in the axial direction.

2B, the droplet discharge head 5 includes a vibration plate 20 provided with a material supply hole 20a connected to a tube 44, and a nozzle plate 21 provided with nozzles N _{1 to} N _180. A liquid reservoir 22 provided between the vibration plate 20 and the nozzle plate 21, a plurality of partition walls 23, and a plurality of storage chambers 24 are provided. Drive elements PZ _{1 to} PZ ₁₈₀ are arranged on the vibration plate 20 corresponding to the nozzles N1 to N180. The drive elements PZ _{1 to} PZ ₁₈₀ are, for example, piezo elements.

The liquid reservoir 22 is filled with a liquid color filter material supplied through the material supply hole 20a. The storage chamber 24 is formed so as to be surrounded by the vibration plate 20, the nozzle plate 21, and a pair of partition walls 23. The storage chamber 24 is provided in a one-to-one correspondence with each of the nozzles N _{1 to} N ₁₈₀ . In addition, the color filter material is introduced into the respective storage chambers 24 from the liquid reservoir 22 through a supply port 24 a provided between the pair of partition walls 23.

As shown in FIG. 2C, the drive element PZ ₁ is obtained by sandwiching a piezoelectric material 25 between a pair of electrodes 26. The drive element PZ ₁ is configured such that the piezoelectric material 25 contracts when a drive signal is applied to the pair of electrodes 26. The vibration plate 20 such drive elements PZ ₁ is disposed, wrinkles become integral with the drive element PZ ₁ applies a driving signal to the pair of electrodes 26 to the outside (opposite side of the accommodating chamber 24) at the same time It bends, and thereby the volume of the storage chamber 24 is increased.

Accordingly, the color filter material corresponding to the increased volume in the storage chamber 24 flows from the liquid reservoir 22 through the supply port 24a. Further, when the application of the drive signal to the drive element PZ ₁ is stopped from such a state, the drive element PZ ₁ and the diaphragm 20 both return to the original shape, and the storage chamber 24 also returns to the original volume. Accordingly, accommodation chamber pressure of the color filter material 24 is increased, the droplet L of the color filter material is ejected toward the nozzle N ₁ on the color filter substrate P. In addition, by using the drive element PZ ₁ , it is possible to cause fine vibration in the storage chamber 24 and adjust the ink discharge amount with high accuracy.

  FIG. 3 is an explanatory diagram of a method for forming a color filter layer (color filter) CF on the color filter substrate P using the droplet discharge head 5. FIG. 3A is a schematic plan view of a color filter substrate P that is an ink discharge target. FIG. 3B is a partially enlarged plan view of the color filter substrate P.

  In FIG. 3A, a plurality of panel areas CA are set on the surface of a large-area color filter substrate P formed of glass, plastic or the like. Each panel area CA is separated (cut) from each other and provided as an individual color filter substrate. In each panel area CA, as shown in FIG. 3B, a plurality of pixels PX (predetermined areas) arranged in a dot shape are provided. The pixels PX are arranged in a matrix in each panel area CA, and a color filter layer (colored layer) CF is formed for each pixel PX.

  The vertical direction (indicated by arrows A1 and A2) in FIG. 3B is the main scanning direction, and the direction orthogonal to the main scanning direction (left and right direction in the drawing) is the sub-scanning direction. Arranged on the filter substrate P. Then, while moving (scanning) the color filter substrate P relative to the droplet discharge head 5 in the main scanning direction and the sub-scanning direction, ink containing a coloring material from a plurality of nozzles N of the droplet discharge head 5 ( Color filter material) is discharged, and a color filter layer CF is formed on each pixel PX on the color filter substrate P.

  The droplet discharge head 5 is scanned a plurality of times for one panel area CA. For example, after the droplet discharge head 5 is scanned in the main scanning direction, the droplet discharge head 5 is moved (scanned) in the sub-scanning direction, and scanning is performed again in the main scanning direction. After moving (sub-scanning) from the left end to the right end of one panel area CA, it returns to the left end of the panel area CA again, and scans in the main scanning direction at a position slightly different from the position where the ejection has already been performed. Then, by performing such scanning a plurality of times, the color filter layer CF having a desired film thickness is formed on all the pixels PX in the panel area CA.

  In FIG. 3B, the reason why the droplet discharge head 5 is inclined with respect to the sub-scanning direction is to match the pitch of the nozzles N of the droplet discharge head 5 with the pitch of the pixels PX. If the pitch of the nozzles N and the pitch of the pixels PX are set so as to satisfy a predetermined correspondence relationship, it is not necessary to tilt the droplet discharge head 5 obliquely.

  The color filter layer CF is formed by arranging R, G, and B colors in an appropriate arrangement form such as a so-called stripe arrangement, delta arrangement, mosaic arrangement, or the like. Therefore, in the ink ejection process shown in FIG. 3B, the droplet ejection heads 5 that eject R, G, and B color filter materials are prepared in advance for the three colors R, G, and B. Then, an array of three color filter layers CF of R, G, and B is formed on one color filter substrate P using these droplet discharge heads 5 in order.

  By the way, in general, in a liquid droplet ejection head, when drawing using ink ejected from a plurality of nozzles N, a predetermined amount (for example, 30 to 70 ng) of ink is ejected for each dot formation. For this reason, there is a case where the ejected ink wets and spreads and enters an ink landing area at an adjacent position. Then, the landing area of the ejected ink will vary. (See FIG. 6 (a)). As described above, when the ink ejected at the time of drawing enters the landing area of the adjacent ink, the arrangement amount (landing area) of the ink on the color filter substrate P varies due to this, and the color filter is not smooth. It will cause to generate.

  FIG. 6 is a diagram illustrating an ink arrangement state on the sheet member 15 before and after the correction of the variation in the ink landing area at the plurality of nozzles N. FIG. FIG. 6A shows an ink arrangement state before correction of variation in landing area. FIG. 6B shows the ink arrangement after correction of the variation in the landing area. In FIG. 6, M (M1 to M5) indicates the arrangement state of the ink corresponding to the plurality of nozzles N arranged in the Y-axis direction described above. Further, MA (MA1 to MA5) indicates an ink arrangement row corresponding to a plurality of nozzle rows NA in which a plurality of rows of nozzles arranged in the Y-axis direction are provided in the X-axis direction. As shown in FIG. 6A, when the arrangement state of the ink corresponding to the plurality of nozzles N and the plurality of nozzle arrays NA is seen, it is confirmed that there is a variation in the landing area as a whole.

  Therefore, in the droplet discharge method of the present invention, the voltage applied to the drive element PZ of the droplet discharge head 5 is adjusted before drawing on the color filter substrate P before correction (before production), and a plurality of nozzles A step of adjusting the ejection characteristics of the ink in N, and ink is landed in a plurality of openings of the partition layer provided in the measurement region on the sheet base material constituting the sheet member, so that the ink in the plurality of nozzles N There is a step of adjusting the landing area. Hereinafter, an example of the droplet discharge method of the present invention will be described.

(Droplet ejection method)
FIG. 4 is a flowchart showing the steps of the droplet discharge method of the present invention. According to the droplet discharge method of the present invention, the apparatus is positioned at a predetermined position and the apparatus is aligned (step S1), and ink is discarded in the dummy area Tb of the sheet member 15. The “first landing step” (step S2) and the “first landing step” (step S3) in which the voltage applied to the drive element PZ is made constant and ink is landed in the plurality of openings in the measurement region Ta of the sheet member 15. ), And the first landing process that measures the first landing area landed on the measurement region Ta of the sheet member 15 after the first landing process and obtains the distribution of the ink discharge amount at the plurality of nozzles N (step S4). And a “sheet member winding step” (step S5) for winding the sheet member 15 and an electric current applied to the drive element PZ so that the ink discharge amount at the plurality of nozzles N approaches a predetermined appropriate amount. And adjusting the "first control step" (step S6), and having a.

  First, the apparatus is positioned at a predetermined position to align the apparatus (step S1 in FIG. 4). Specifically, the sheet member conveyance table 11 is moved in the X-axis direction toward the work stage 16 and is disposed immediately below the droplet discharge head 5. As a result, the sheet member 15 on the sheet member conveyance table 11 is disposed so as to face the plurality of nozzles N of the droplet discharge head 5. At this time, the dummy region Tb of the sheet member 15 is disposed so as to face the plurality of nozzles N of the droplet discharge head 5.

  Next, with the voltage applied to the drive element PZ being constant, the ink is ejected to the dummy area Tb of the sheet member 15 and discarded. Specifically, the droplet discharge head 5 moves relative to the sheet member 15 in the main scanning direction (X-axis direction) that intersects the arrangement direction (Y-axis direction) of the plurality of nozzles N, and moves toward the drive element PZ. The applied voltage is made constant, and a plurality of ink droplets are ejected from each nozzle of the plurality of nozzles N to the dummy region Tb of the sheet member 15 and discarded. As a result, ink can be discharged and discarded to the dummy area Tb of the sheet member 15 from the start of drawing where the ink discharge amount is unstable to the predetermined drawing number at which the ink discharge amount is stabilized. The discarding of the ink to the dummy area Tb is performed by continuously ejecting the ink so that a plurality of inks overlap with each other while the droplet ejection head 5 is stopped from the viewpoint of efficiently using the sheet member 15. May be.

  Next, as in the first discarding step described above, the voltage applied to the drive element PZ is made constant, and ink is landed on the measurement region Ta of the sheet member 15 at a predetermined interval (step S3 in FIG. 4). Specifically, the droplet discharge head 5 is moved in the Y-axis direction along the sheet member conveyance table 11. Thereby, the measurement region Ta of the sheet member 15 is arranged so as to face the plurality of nozzles N of the droplet discharge head 5. Then, since the ink discharge amount is stabilized from the unstable state by the first discarding process, the ink discharge amount is landed on the measurement region Ta in a stable state.

  In addition, the ink is preferably landed in an appropriate arrangement form such as a stripe arrangement, a delta arrangement, or a mosaic arrangement in accordance with the color filter layer CF. Thereby, the ink ejection state before correction (when ejecting to the sheet member 15) and the ink ejection state after correction (when ejecting to the color filter substrate P) at the plurality of nozzles N of the droplet ejection head 5 , Will ensure alignment.

  In addition, when the ink is landed on the sheet member 15, it is preferable to land the ink in a plurality of times. Specifically, first, the first ink is landed on a predetermined area on the sheet member 15. Next, the second ink is landed on a region where the first ink is not landed. Thereby, since ink can be repeatedly landed on the sheet member 15 a plurality of times, the sheet member 15 can be used effectively without waste.

  In the present embodiment, in contrast to the conventional method of measuring the weight of ink ejected from a plurality of nozzles, a plurality of partition walls 15b provided in the measurement region Ta on the sheet base material 15a constituting the sheet member 15 are provided. A method is used in which ink is landed in the opening 15 c and the distribution of the ejection amount of the ink ejected from the plurality of nozzles N is obtained based on the ink landing area at the plurality of nozzles N. As a result, it is not necessary to measure the weight of the ink as in the conventional case, and a huge number of man-hours are not required.

  In addition, since ink is landed in the plurality of openings 15c in the measurement region Ta of the sheet member 15, the variation in the ink landing area in the measurement region Ta of the sheet member 15 is reduced. This is because when the ink lands in the plurality of openings 15c of the partition wall layer 15b provided in the measurement region Ta, the discharged ink wets and spreads and enters the ink landing region in the adjacent position. This is because the permeability to the ink on the surface of the sheet member 15 is made uniform. Hereinafter, the permeability of the sheet member 15 to the ink will be described with reference to the state of the ink receiving layer of the sheet member 15 before and after moisture absorption.

  FIG. 5 is a diagram illustrating the state of the ink receiving layer of the sheet member 15 before and after moisture absorption. FIG. 5A is a diagram illustrating a state of the ink receiving layer 50a before moisture absorption. FIG. 5B shows the state of the ink receiving layer 50b after moisture absorption.

  As shown in FIGS. 5A and 5B, the ink receiving layers 50 a and 50 b include a plurality of pigments 51 and binders 52. The pigment 51 is included in the binder 52. The ink receiving layers 50 a and 50 b have a porous structure having a large number of voids 53 between the plurality of binders 52. In the ink receiving layer 50b, the size of the gap 53 is smaller than that of the ink receiving layer 50a. This is because the pigment 51 and the binder 52 constituting the ink receiving layer expand due to moisture absorption.

  Examples of pigments that can be used in the porous ink receiving layer include light calcium carbonate, heavy calcium carbonate, magnesium carbonate, kaolin, talc, calcium sulfate, barium sulfate, titanium dioxide, zinc oxide, zinc sulfide, zinc carbonate, White inorganic such as satin white, aluminum silicate, diatomaceous earth, calcium silicate, magnesium silicate, synthetic amorphous silica, colloidal silica, alumina, hydrated alumina, aluminum hydroxide, lithopone, zeolite, hydrohalosite, magnesium hydroxide Examples thereof include organic pigments such as pigments, styrene plastic pigments, acrylic plastic pigments, polyethylene, microcapsules, urea resins, and melamine resins. In the ink receiving layer, one of these may be contained alone, or two or more thereof may be used in combination.

  The binder contained in the ink receiving layer as the binder for the pigment may contain a water-soluble or water-insoluble polymer compound having affinity with the ink. Examples of the water-soluble polymer compound include cellulose-based adhesives such as methylcellulose, methylhydroxyethylcellulose, methylhydroxypropylcellulose, and hydroxyethylcellulose, starch and modified products thereof, gelatin and modified products thereof, casein, pullulan, gum arabic, And natural polymer resins such as albumin or derivatives thereof, polyvinyl alcohol and modified products thereof, styrene-butadiene copolymer, styrene-acrylic copolymer, methyl methacrylate-butadiene copolymer, ethylene-vinyl acetate copolymer, etc. Latex, emulsions, vinyl polymers such as polyacrylamide and polyvinylpyrrolidone, polyethyleneimine, polypropylene glycol, polyethylene glycol, and maleic anhydride Coalescence, and the like.

  Examples of the water-insoluble polymer compound include water-insoluble adhesives that dissolve in alcohols such as ethanol and 2-propanol and mixed solvents of these alcohols and water. Examples of such a water-insoluble adhesive include acetal resins such as vinylpyrrolidone / vinyl acetate copolymer, polyvinyl butyral, and polyvinyl formal.

  Incidentally, the sheet member 15 is generally stored in a predetermined atmosphere so that moisture does not penetrate into the ink receiving layer. However, the pigment 51 and the binder 52 constituting the ink receiving layer have good hygroscopicity. For this reason, when drawing using ink ejected from the plurality of nozzles N of the droplet ejection head 5, if a predetermined amount (for example, 30 to 70 ng) of ink is ejected for each dot formation, the ink is ejected. Ink is easily penetrated into the pigment 51 and the binder 52 and spreads. If the ejected ink penetrates into the pigment 51 or the binder 52 and spreads out, the ink may enter the landing area of the ink at an adjacent position. Then, the permeability of the surface of the sheet member 15 becomes uneven due to the penetration of the ink into the pigment 51 and the binder 52. If the permeability of the surface of the sheet member 15 is not uniform, it may cause a problem in the measurement of the ink landing area on the sheet member 15.

  Therefore, in the droplet discharge device 1 of the present invention, a partition wall layer having a plurality of openings for partitioning the ink receiving layer is provided in advance in the measurement region Ta of the sheet member 15 before the ink is landed. Then, ink is landed in the plurality of openings of the measurement area Ta, so that the discharged ink is prevented from spreading and entering the ink landing area at the adjacent position, thereby forming the ink receiving layer. By uniformly uniforming the size of the plurality of voids 53 existing between the plurality of binders 52, the surface permeability is uniformized. This makes it possible to accurately measure the ink landing area on the sheet member 15. That is, the variation in the landing area of the ink that has occurred between the plurality of nozzles N in the initial state (before correction) in FIG. 6A can be approximately averaged as shown after correction in FIG. . Hereinafter, the configuration of the sheet member 15 will be described with reference to the arrangement state of the ink in the measurement region Ta of the sheet member 15.

  FIG. 7 is a diagram showing an arrangement state of ink in the measurement region Ta of the sheet member 15 in the present invention. FIG. 7A is a plan view illustrating an ink arrangement state in the measurement region Ta of the sheet member 15. FIG.7 (b) is sectional drawing along the KK line | wire of Fig.7 (a). In FIG. 7, the symbol D is the landing diameter of the ejected ink. The symbol Wa is the ink landing interval, and the symbol Wb is the opening interval. Further, the symbol Ha is the height of the ink receiving layer, and the symbol Hb is the height of the partition wall layer. The ink landing interval Wa is the distance between the centers of adjacent inks. The opening interval Wb is the distance between the rib centers of the partition wall layer 15b adjacent to the opening 15c. The height Ha of the ink receiving layer is the distance from the upper surface of the sheet base material 15a to the upper surface of the receiving layer 50. The height Hb of the partition wall layer is a distance from the upper surface of the sheet base material 15a to the upper surface of the partition wall layer 15b.

  As shown in FIG. 7A, the sheet member 15 has a sheet base material 15a serving as a base material in a region where ink is landed, and ink is landed on the sheet base material 15a at a predetermined landing interval Wa. The measurement area Ta, the dummy area Tb, a partition layer 15b provided in the measurement area Ta on the sheet base material 15a and having a plurality of openings 15c, and an alignment mark 70 are configured. The opening interval Wb of the plurality of openings 15c is larger than the ink landing diameter D. The alignment mark 70 is provided at a predetermined position on two opposite sides on the sheet base material 15a. With this alignment mark 70, the partition wall layer 15b is accurately formed on the sheet base material 15a. Further, it is possible to accurately eject ink into the plurality of openings 15c of the partition wall layer 15b.

  As shown in FIG. 7B, the partition layer 15b is formed such that the height Hb of the partition layer is higher than the height Ha of the ink receiving layer (Hb> Ha). As a result, when drawing is performed by ejecting ink from a plurality of nozzles N, even if a predetermined amount (for example, 30 to 70 ng) of ink is ejected for each dot formation, the ejected ink spreads and is adjacent. Intrusion into the ink landing area at the matching position is greatly prevented. Specifically, when the ink ejected from the plurality of nozzles N is landed in the opening 15c, the ink receiving layer 50 has good hygroscopicity as described above, so that the ink solvent 60a It penetrates into the ink receiving layer 50. However, since the partition layer 15b that partitions the ink receiving layer 50 is provided higher than the height Ha of the ink receiving layer on the sheet base material 15a, even if the ink solvent 60a penetrates into the ink receiving layer 50. , It is reliably prevented from penetrating into the ink receiving layer 50 at the adjacent position.

  As the partition wall layer 15b, for example, a laser metal mask manufactured by laser processing can be used. The sheet member 15 can be manufactured by attaching the laser metal mask to the sheet base material 15a and disposing the ink receiving layer 50 in the opening 15c.

  Further, as the material for forming the partition wall layer 15b, a material having excellent chemical resistance can be used. Examples of the material excellent in chemical resistance include thermosetting acrylic resin, melamine resin, epoxy resin, alkyd resin, unsaturated polyester resin, and polyimide resin.

  Thermosetting acrylic resins include acrylic acid, methacrylic acid or esterified products thereof copolymerized with styrene, vinyltoluene, vinyl acetate, acrylonitrile, that is, generally called acrylic resins, and isocyanate compounds as curing agents. , A melamine resin, a resin using an epoxy resin, or a resin obtained by copolymerizing a functional monomer such as N-methylolacrylamide, alkoxy-N-methylolacrylamide, etc. with the above acrylic resin.

  As the melamine resin, 1 to 6 hydrogenated amino group (-NH2) melamines, water-soluble melamine resins composed of quantifiers thereof, or methylol groups are esterified with C1 to C4 aliphatic alcohols. Examples include melamine, an oil-soluble melamine resin comprising a quantifier thereof, a polyester resin, and an acrylic resin crosslinked with melamine resin.

  Epoxy resins include bisphenol A type epoxy resins which are oligomers or polymers obtained by reaction of bisphenol A and epichlorohydrin, novolak type epoxy resins obtained by reaction of novolak resin and epichlorohydrin, or tetrabromobisphenol. Brominated epoxy resins which are oligomers or polymers obtained by the reaction of A or brominated phenol novolac and epichlorohydrin, or glycidylamine type epoxy resins of carboxylic acid and epichlorohydrin, or amines and / or aminophenols And epichlorohydrin glycidylamine type epoxy resin, or alicyclic epoxy resin obtained by oxidizing an alicyclic compound having a double bond with peracid.

  Alkyd resins include fatty acid-modified alkyd resins composed of fatty acids and polybasic acids, polyhydric alcohols, oil-free alkyd resins that do not contain fatty acids, those that are cross-linked with unsaturated fatty acid radical initiators, polyisocyanates, or melamines And those that are cured by cross-linking.

  Examples of the unsaturated polyester resin include those obtained by dissolving a polyester composed of an unsaturated dibasic acid such as maleic anhydride or a derivative thereof and a polyhydric alcohol in a liquid vinyl monomer, or unsaturated 1 such as acrylic acid or methacrylic acid in an epoxy resin. What dissolved the compound which added the basic acid in the liquid vinyl monomer (vinyl ester resin) is mentioned.

  Examples of the polyimide resin include polycondensation-type polyimides obtained by polycondensation of tetracarboxylic dianhydride and diamine, or those obtained by addition polymerization of maleimide or bismaleimide.

  Examples of the resin that is a photosensitive resin and excellent in chemical resistance include a photocrosslinkable acrylic resin, a photosensitive polyimide, and a novolak resin containing naphthoquinone diamide as a photosensitive group.

  Examples of the photocrosslinkable acrylic resin include a photocurable acrylic resin obtained by adding a polyfunctional acrylate, a monomer or an oligomer, and a photoinitiator to the acrylic resin.

  Among the photosensitive polyimides, the photocurable polyimide has a photosensitive group such as a methacryl group in a varnish of a polyimide precursor that is generally produced in a dipolar aprotic solvent by combining tetracarboxylic acid and a diamine. A mixture of amino compounds, dimerized or polymerizable groups introduced by light through ester bonds, N-methylol acrylamide compound mixed with polyimide precursor varnish, or acrylic monomer as polyimide precursor What was mixed with the body varnish is mentioned.

  Among the photosensitive polyimides, examples of the light-soluble polyimide include those obtained by introducing a photodegradable photosensitive group into a polyamic acid through an ester bond, and those obtained by adding a naphthoquinone diazide compound to the polyamic acid.

  As the novolak resin containing naphthoquinone diamide as a photosensitive group, for example, polyhydroxybenzophenone and an ester of o-naphthoquinone diazide sulfonic acid mixed with cresol novolac resin, or phenol novolac resin naphthoquinone-1,2-diazide-5-sulfone Acid ester.

  On the other hand, the dot-like ink solute 60 remains on the upper surface of the ink receiving layer 50. The opening interval Wb between the plurality of openings 15c is larger than the diameter of the dot-like ink solute 60, that is, the ink landing diameter D (Wb> D). For example, if the ink landing diameter D is 30 to 50 μm, the plurality of openings 15c of the partition wall layer 15b are designed so that the opening interval Wb is 100 to 150 μm. In this way, the landing diameter D of the ink discharged from the plurality of nozzles N of the droplet discharge head 5 to the measurement area Ta of the sheet member 15 is made uniform.

  Next, the landing area of the ink landed on the measurement region Ta of the sheet member 15 is measured, and the average area is set as the landing area of the ink ejected from each nozzle N. Based on the obtained landing area measurement data Then, the distribution of the ink discharge amount at the plurality of nozzles N is obtained (step S4 in FIG. 4). Specifically, the landed area of the ink ejected from the plurality of nozzles N to the sheet member 15 is photographed by the area measurement camera 14 arranged at a position facing the upper surface of the measurement area Ta of the sheet member 15. At this time, the magnification of the lens of the area measurement camera 14 is preferably set to 4 to 10 times, for example, in terms of measurement accuracy and measurement time. Further, the N number for measuring the ink landing area is preferably set to N = 20 to 30 from the viewpoint of measurement accuracy.

  The ink landing area image data photographed by the area measurement camera 14 is output to the analysis unit 32. Then, the ink landing area at the plurality of nozzles N is measured by the analysis unit 32, and the distribution of the ink discharge amount at the plurality of nozzles N is obtained based on the measurement data of the landing area. The distribution data of the ink discharge amount at the plurality of nozzles N is output to the control unit 31.

  Next, the sheet member 15 is wound up (step S5 in FIG. 4). Specifically, the sheet member 15 on which ink is landed is taken up by the take-up reel 13. That is, a new sheet member 15 that is not landed with ink is supplied from the supply reel 12.

  Next, the voltage applied to the drive element PZ is adjusted (step S6 in FIG. 4). Specifically, the voltage applied to the drive element PZ provided for each of the plurality of nozzles N is adjusted by the control unit 31 so that the ink discharge amount at the plurality of nozzles N approaches a predetermined appropriate amount.

  FIG. 8 is a diagram showing the ejection characteristics of the droplet ejection head before and after correcting the variation in the ink ejection amount. In FIG. 8, the horizontal axis indicates the nozzle numbers 1 to 180 of the nozzle row NA, and the vertical axis indicates the discharge amount of the nozzle corresponding to each nozzle number. As shown in FIG. 8, when the solid line before the correction of the variation in the ink discharge amount is seen, it can be seen that the ink discharge amount tends to be relatively large at the nozzles at both ends and the central portion.

  For example, a predetermined voltage is applied to the drive element PZ corresponding to the nozzle in the region where the ink ejection amount is relatively small in the initial state (see the solid line before correction in FIG. 8). On the other hand, no voltage is applied to the drive element PZ corresponding to the nozzle in the region where the ink discharge amount is relatively large in the initial state.

  In this way, the variation in the discharge amount generated between the plurality of nozzles N is adjusted by the drive element PZ. As a result, the variation in the ink ejection amount among the plurality of nozzles N is corrected. That is, the variation in the ink discharge amount that has occurred between the plurality of nozzles N in the initial state (solid line before correction) can be approximately averaged as indicated by the solid line after correction.

  According to the droplet discharge device 1 of the present embodiment, an image in which ink discharged from a plurality of nozzles N is landed on the measurement region Ta in the sheet member 15 is captured by the area measurement camera 14. Then, based on the landing area of the ink ejected from the plurality of nozzles N by the analysis unit 32, the distribution of the ejection amount of the ink ejected from the plurality of nozzles N is obtained. Then, the voltage applied to the drive element PZ by the control unit 31 is adjusted so that the ink discharge amount at the plurality of nozzles N approaches a predetermined appropriate amount. That is, the control unit 31 corrects the variation in the ink discharge amount of the plurality of nozzles N. For this reason, it is possible to discharge a uniform amount of ink from all the nozzles N of the droplet discharge head 5. A partition layer 15b having a plurality of openings 15c having an opening interval Wb larger than the ink landing diameter D is provided in the measurement region Ta of the sheet member 15. Therefore, when drawing is performed by ejecting ink from a plurality of nozzles N, even if a predetermined amount (for example, 30 to 70 ng) of ink is ejected for each dot formation, the plurality of nozzles N provided on the partition wall layer 15b. By landing the ink in the opening 15c, it is possible to prevent the discharged ink from spreading and entering the ink landing area at the adjacent position. This makes it possible to make the ink landing area uniform in all nozzles N of the droplet discharge head 5 in the measurement region Ta that contributes to image display. Accordingly, it is possible to suppress the deterioration of the image quality by making the stripes inconspicuous. Further, ink is landed in the plurality of openings 15c of the partition wall layer 15b provided in the measurement region Ta on the sheet base material 15a constituting the sheet member 15, and based on the ink landing area in the plurality of nozzles N. The method for obtaining the distribution of the ejection amount of the ink ejected from the plurality of nozzles N does not require enormous man-hours as compared with the conventional method for measuring the weight of the ink ejected from the plurality of nozzles N, so that the production efficiency Excellent. Further, since the sheet member 15 on which the ink ejected from the plurality of nozzles N has been landed is appropriately transported, the landed area can be measured efficiently.

  According to this configuration, since the height Hb of the partition wall layer is higher than the height Ha of the ink receiving layer, when drawing is performed by ejecting ink from the plurality of nozzles N, a predetermined amount (for example, for each dot formation) , 30 to 70 ng), even when the ink is ejected, the ink is landed in the plurality of openings 15c of the partition wall layer 15b which is higher than the height of the ink receiving layer 50. Intrusion into the ink landing area at the position is markedly prevented. As a result, in the measurement area Ta that contributes to image display, it is possible to make the ink landing area at all the nozzles N of the droplet discharge head 5 extremely uniform.

  According to the droplet discharge method of the present embodiment, ink is landed in the plurality of openings 15c of the partition wall layer 15b provided in the measurement region Ta on the sheet base material 15a constituting the sheet member 15 by the first landing process. Therefore, it is possible to prevent the ejected ink from spreading and entering the ink landing area at the adjacent position. Thereby, the variation of the ink landing area in the measurement region Ta is reduced. Then, the distribution of the ink ejection amount at the plurality of nozzles N is obtained by the first analysis step after the first landing step. In the first control step, the ink discharge amount at the plurality of nozzles N is adjusted to approach a predetermined appropriate amount. As a result, the variation in the ink discharge amount among the plurality of nozzles N is corrected. For this reason, it is possible to discharge a uniform amount of ink from all the nozzles N of the droplet discharge head 5 and to uniformize the ink landing area at all the nozzles N. Accordingly, it is possible to suppress the deterioration of the image quality by making the stripes inconspicuous.

  In the droplet discharge method, after the first control step, ink is landed in the plurality of openings 15c of the partition wall layer 15b provided in the measurement region Ta on the sheet base material 15a constituting the sheet member 15. The second landing process, and after the second landing process, the second landing area of the ink landed in the plurality of openings 15c in the measurement region Ta of the sheet member 15 is measured and discharged from the plurality of nozzles N. A second analysis step for obtaining a distribution of the ink ejection amount, and a second control step for adjusting a voltage applied to the plurality of drive elements PZ so that the ink ejection amount at the plurality of nozzles N approaches a predetermined appropriate amount from the distribution. And at least once.

  According to this manufacturing method, after the first control step, the landing step, the analysis step, and the control step are repeatedly performed a plurality of times, thereby causing variations in the ink discharge amount of the plurality of nozzles N and landing of the plurality of nozzles N. The variation in area is reliably adjusted. For this reason, it is possible to discharge a substantially uniform amount of ink from all the nozzles N of the droplet discharge head 5 and to make the ink landing area in all the nozzles N extremely uniform. Therefore, it is possible to make the unevenness more inconspicuous and to suppress the deterioration of the image quality.

  In the droplet discharge method, the ink that is landed in the second landing process is also arranged in an appropriate arrangement form in the same manner as in the first landing process (step S3 in FIG. 4), following the color filter layer CF. It ’s better to land. Thereby, the ejection state before correction in the plurality of nozzles N of the droplet ejection head 5 and the ejection state after correction are surely matched.

  Further, according to the color filter manufacturing method of the present invention, as described above, a uniform amount of ink is ejected from all nozzles of the droplet ejection head, and the ink landing area at all nozzles is made uniform. It is possible to produce a high-quality color filter without streaking.

  In the above-described embodiment, the case where the color filter is manufactured using the droplet discharge device 1 in which the variation in the landing area of the ink between the nozzles is adjusted has been described. However, the present invention is not limited to this. For example, the droplet discharge device 1 of the present invention can be applied not only to the manufacture of a color filter but also to a film forming process in which uniform film thickness is required and the formation of stripes becomes a problem.

DESCRIPTION OF SYMBOLS 1 ... Droplet discharge apparatus, 5 ... Droplet discharge head, 12 ... Supply reel, 13 ... Take-up reel, 14 ... Area measurement camera (imaging device), 15 ... Sheet member, 15a ... Sheet base material, 15b ... Partition Layer, 15c ... opening, 31 ... control unit (control means), 32 ... analysis unit (analysis means), 50, 50a, 50b ... ink receiving layer, 51 ... pigment, 52 ... binder, CF ... color filter layer (color Filter), D ... landing diameter, Ha ... height of ink receiving layer, Hb ... height of partition wall layer, N ... nozzle, P ... color filter substrate (base material), PZ ... drive element, Wb ... opening distance

Claims (5)

A droplet discharge head having a plurality of nozzles for discharging a functional liquid, and a plurality of drive elements provided corresponding to the plurality of nozzles;
A supply reel for supplying a sheet member on which the functional liquid discharged from the plurality of nozzles is landed;
A take-up reel that winds up the sheet member supplied from the supply reel;
An imaging device that captures an image of the functional liquid ejected from the plurality of nozzles with respect to the sheet member between the supply reel and the take-up reel;
Analysis means for measuring the landing area of the functional liquid on the sheet member by performing image processing on the image photographed by the imaging device, and obtaining a distribution of the ejection amount of the functional liquid ejected from the plurality of nozzles; ,
Control means for adjusting a voltage applied to the plurality of drive elements so that the discharge amount at the plurality of nozzles approaches a predetermined appropriate amount from the distribution,
The sheet member is provided in each opening of the partition wall layer, a partition wall layer having a plurality of openings having an opening interval larger than a landing diameter of the functional liquid provided on the sheet base material, and the partition wall layer. And a porous ink-receiving layer in which the pigment is bound with a binder.   The droplet discharge device according to claim 1, wherein a height of the partition layer is higher than a height of the ink receiving layer. A droplet discharge method using a droplet discharge head having a plurality of nozzles for discharging a functional liquid and a plurality of drive elements provided corresponding to the plurality of nozzles,
A first landing step of landing the functional liquid on a sheet member;
After the first landing step, a first analysis step of measuring a first landing area of the functional liquid landed on the sheet member and obtaining a distribution of the discharge amount of the functional liquid discharged from the plurality of nozzles. When,
A first control step of adjusting a voltage to be applied to the plurality of drive elements so that the discharge amount at the plurality of nozzles approaches a predetermined appropriate amount from the distribution,
The sheet member is provided in each opening of the partition wall layer, a partition wall layer having a plurality of openings having an opening interval larger than a landing diameter of the functional liquid provided on the sheet base material, and the partition wall layer. A porous ink receiving layer in which the pigment is bound with a binder,
In the first landing step, the functional liquid is landed in each opening of the partition layer of the sheet member. A second landing step of landing the functional liquid in each opening of the partition layer of the sheet member after the first control step;
After the second landing step, the second landing area of the functional liquid landed in each opening of the partition layer of the sheet member is measured, and the discharge amount of the functional liquid discharged from the plurality of nozzles is measured. A second analysis step for obtaining a distribution;
2. A second control step of adjusting a voltage applied to the plurality of drive elements so that the discharge amount of the plurality of nozzles approaches a predetermined appropriate amount from the distribution, at least once. 4. The droplet discharge method according to 3.   A method for producing a color filter, comprising: using the droplet discharge method according to claim 3 or 4 to form a color filter by arranging the functional liquid in a predetermined region provided on a substrate.

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