JP2003232912A - Method and device for manufacturing picture display element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device for manufacturing a picture display element which can uniformly spread ink emitted in a color area on a glass substrate and can prevent color mixture. <P>SOLUTION: Ink is emitted to a color area 21 synchronously with relative scanning of an ink jet head 2 and a glass substrate 1, and ink is emitted to the same color area 21 by plurality of times of scanning, and ink is emitted to another color area 21, which is adjacent to the color area 21 and requires to be colored with ink different by property, after 5 to 180 seconds after the completion of ink emission to the optional color area 21. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for manufacturing an image display device using an inkjet head.

[0002]

2. Description of the Related Art Conventionally, an ink jet method has been known as a method for manufacturing a highly accurate image display element (color filter). However, the conventional inkjet method has a problem in that it is difficult for the ink to uniformly spread to every corner of each colored region that constitutes a pixel, and a pixel with uneven ink is generated. To solve this problem, JP-A-11
There is a method disclosed in 153709 (color filter manufacturing method).

This conventional invention will be described with reference to FIG. In FIG. 17, a colored region 21 is a region formed on a glass substrate where coloring is performed with the ejected ink, and is a constituent element of each pixel of the image display element. The ink droplet 23 is an ink droplet ejected from the inkjet head. In this conventional invention, the ink droplets 23 are made to adhere to each colored area 21 while overlapping the ink droplets 23 in the longitudinal direction, and the plurality of ink droplets 23 are evenly applied to every corner of each colored area 21. Is characterized by.

FIG. 18 is a diagram showing a state when the ink droplets 23 ejected from the ink jet head adhere to the colored region 21 (immediately after ejection). In FIG. 18, 1 is a glass substrate, and 22 is a boundary portion of each colored region. Further, R indicates red ink, G indicates green ink, and B indicates blue ink. L represents the distance (horizontal direction distance) between each colored area. The size of the colored region 21 is about 90 in recent technology.
Although a product of about μm × about 270 μm is manufactured, it is expected that the distance L between the colored regions will be shortened synergistically due to further miniaturization with technological progress. Therefore,
A technique for manufacturing a more accurate image display element without causing color mixture between adjacent colored regions 21 is expected.

[0005]

However, in the conventional invention, when the ink droplets 23 are actually continuously ejected to the colored region 21, the liquid is not sufficiently wet immediately after the ink droplets 23 are adhered to the colored region 21. Not spread evenly. Therefore, when the ink droplets 23 are continuously discharged and adhered to a predetermined amount, the ink droplets 23 bounce and the like,
In addition, due to the displacement of the ejection position and the unevenness of the liquid repellency of the colored region boundary portion 22, the ink droplets 23 are deposited on the colored region boundary portion 22.
Rides up, and the ink droplets 23 of other adjacent colored areas 21
May cause color mixing. Generally, in the colored area boundary portion 22, color mixing often occurs in the portion A of FIG.

The present invention has been made to solve the above problems, and an apparatus and apparatus for manufacturing an image display device capable of uniformly spreading ink ejected in a colored region and preventing color mixture. The purpose is to provide a method.

[0007]

In order to solve the above problems, an image display device manufacturing apparatus and a manufacturing method thereof according to the present invention have the following configurations. The invention according to claim 1 is an inkjet head having a plurality of ink ejection nozzles,
A scanning unit that relatively scans the inkjet head and a substrate on which a colored region to which ink is attached is scanned, and the inkjet head synchronizes with the colored region in synchronization with scanning by the scanning unit. An apparatus for manufacturing an image display element, characterized in that ink is ejected and the ink is ejected to the same colored region in a plurality of divided scans.

According to a second aspect of the present invention, there is provided an ink jet head having a plurality of ink ejection nozzles, and a scanning means for relatively scanning the ink jet head and a substrate on which a colored region for adhering ink is formed. Have,
The inkjet head ejects ink to the colored region in synchronization with the scanning by the scanning unit and completes ink ejection to an arbitrary colored region, and then ink adjacent to the colored region and having different properties. The apparatus for producing an image display element is characterized in that ink is ejected to a colored region requiring coloring by a predetermined period of time.

According to a third aspect of the present invention, there is provided an ink jet head having a plurality of ink ejection nozzles, and a scanning means for relatively scanning the ink jet head and a substrate on which a colored region for adhering ink is formed. Have,
The inkjet head ejects ink onto the colored region in synchronism with the scanning by the scanning means, and ejects the ink onto the same colored region in a plurality of divided scans, and further onto an arbitrary colored region. An image display device manufacturing apparatus, characterized in that, after ink ejection is completed, ink is ejected to a colored region adjacent to the colored region and requiring coloring with inks of different properties after a predetermined time has elapsed.

According to a fourth aspect of the present invention, there is provided the image display element manufacturing apparatus according to the second or third aspect, wherein the predetermined time is 5 to 180 seconds.

According to a fifth aspect of the present invention, the ink color to be ejected is changed every time the scanning is performed by the scanning means, and the image display according to any one of the first to fourth aspects. This is a device manufacturing apparatus.

According to a sixth aspect of the invention, one is provided for each scan.
The number of droplets ejecting one color to each of the one colored region is obtained by subtracting n (n is a positive integer satisfying m> n) from the number m of droplets to be ejected to one of the colored regions (m is a positive integer). Minutes (m-
6. The apparatus for manufacturing an image display element according to claim 5, wherein the remaining n drops of ink are ejected when ejecting ink of another color in another scan.

According to a seventh aspect of the present invention, in the case of coloring a substrate in which the colored regions are arranged in a delta shape, the ink jet head is determined based on a mutual distance between a plurality of colored regions forming pixels. The apparatus for manufacturing an image display element according to any one of claims 1 to 4, wherein the ink is ejected in the specified order.

According to an eighth aspect of the present invention, the ink jet head has one of a plurality of colored regions forming triangular or inverted triangular pixels at the time of scanning or the forward path of scanning. 8. The ink is ejected to a plurality of colored areas forming pixels, and the ink is ejected to a plurality of colored areas forming pixels of other shapes during another scanning or a returning path of the scanning. The manufacturing apparatus of the image display element described in 1.

According to a ninth aspect of the present invention, the ink jet head ejects red, green and blue inks, and the image display according to any one of the first to eighth aspects. This is a device manufacturing apparatus.

According to a tenth aspect of the present invention, the ink jet head uses a piezo element to eject ink, and the image display element according to any one of the first to ninth aspects. Manufacturing equipment.

The image display device according to any one of claims 1 to 9, wherein the ink jet head ejects ink by utilizing thermal energy. This is a device manufacturing apparatus.

According to a twelfth aspect of the present invention, in the image display element manufacturing apparatus according to any one of the first to eleventh aspects, the image display element is a color filter. is there.

According to a thirteenth aspect of the present invention, a scanning step of relatively scanning an ink jet head having a plurality of ink ejection nozzles and a substrate on which a colored region for adhering ink is formed, and in synchronization with the scanning step. An ejecting step of ejecting ink to the colored region and ejecting ink to the same colored region by dividing the scanning into a plurality of scans.

According to a fourteenth aspect of the present invention, there is provided a scanning step of relatively scanning an ink jet head having a plurality of ink ejection nozzles and a substrate on which a colored region for adhering ink is formed, and in synchronization with the scanning step. After ejecting ink to the colored area and completing ink ejection to an arbitrary colored area, predetermined ink ejection is performed to a colored area adjacent to the colored area and requiring coloring with ink of different properties. And a discharging step performed after a lapse of time, which is a method for manufacturing an image display element.

According to a fifteenth aspect of the present invention, a scanning step of relatively scanning an ink jet head having a plurality of ink ejection nozzles and a substrate on which a colored region to which ink is attached is performed, and in synchronization with the scanning step. After the ink is ejected to the colored area and the ink is ejected to the same colored area by dividing the scanning into plural times, and the ink is ejected to an arbitrary colored area, the adjacent colored area is different. An ejecting step of ejecting ink to a colored region that requires coloring with an ink having the above property after a predetermined time has elapsed, and a method for manufacturing an image display element.

According to a sixteenth aspect of the invention, there is provided the image display element manufacturing method according to the fourteenth aspect or the fifteenth aspect, wherein the predetermined time is 5 to 180 seconds.

According to a seventeenth aspect of the present invention, the method of manufacturing an image display element according to any one of the thirteenth to sixteenth aspects is characterized in that the ink color to be ejected is changed for each scanning. Is.

In the eighteenth aspect of the present invention, in the discharging step, the number of droplets for discharging one color of ink to one of the colored areas for each scanning is the number of droplets to be discharged to one of the colored areas. From m (m is a positive integer) to n (n is m> n)
Is a value obtained by subtracting (a positive integer) that is (mn), and the remaining n drops of ink further include a process of ejecting ink of another color in another scan. The method for manufacturing an image display device according to claim 17.

According to a nineteenth aspect of the present invention, in the discharging step, when coloring the colored regions on the substrate arranged in a delta shape, based on a mutual distance between a plurality of colored regions forming pixels. 17. The method of manufacturing an image display device according to claim 13, further comprising a process of ejecting ink in a predetermined order.

According to a twentieth aspect of the invention, in the discharging step, one of a plurality of colored regions forming triangular or inverted triangular pixels is formed at the time of scanning or at the time of forward scanning. The method further includes a process of ejecting ink to a plurality of colored regions forming pixels, and ejecting ink to a plurality of colored regions forming pixels of other shapes during another scan or a return pass of scanning. Claim 1
9 is a method for manufacturing the image display element described in 9.

The invention according to claim 21 is characterized in that the ink jet head discharges red, green and blue inks, and the image display according to any one of claims 13 to 20. It is a method of manufacturing an element.

According to a twenty-second aspect of the present invention, the ink jet head uses a piezo element to eject ink, and the image display element according to any one of the thirteenth to the twenty-first aspects. Is a manufacturing method.

According to a twenty-third aspect of the invention, the image display according to any one of the thirteenth to twenty-first aspects is characterized in that the ink jet head ejects ink by utilizing thermal energy. It is a method of manufacturing an element.

According to a twenty-fourth aspect of the present invention, in the method of manufacturing an image display element according to any one of the thirteenth to twenty-third aspects, the image display element is a color filter. is there.

The present invention has the effect that it is possible to provide an image display element manufacturing apparatus and a manufacturing method thereof that can uniformly spread ink in a region to be colored. Further, the present invention has an effect of providing an image display element manufacturing apparatus and a manufacturing method thereof capable of preventing color mixing between adjacent colored regions. Further, the present invention has an effect of providing a manufacturing apparatus and a manufacturing method thereof capable of efficiently manufacturing a high quality image display element.

[0032]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments specifically showing preferred modes for carrying out the present invention will be described below with reference to the drawings.

<< Embodiment 1 >> An apparatus and method for manufacturing an image display device according to Embodiment 1 will be described with reference to FIGS. First Embodiment FIG. 1 is a schematic view showing an image display device manufacturing apparatus according to a first embodiment of the present invention. In FIG. 1, a glass substrate 1 is a glass substrate that serves as a base material of an image display element, and is typically used for a color filter or the like. Further, the present invention is effective not only when using glass but also when using a resin material. On the glass substrate 1, a colored region to be colored by ejecting ink is formed.

The ink jet head 2 is an ink jet head having a plurality of nozzles. The ink jet head 2 is typically an ink jet head unit including a plurality of ink jet heads, and is used for a plurality of types of colors, for example, R (red), G (green), and B (blue). It has an inkjet head.

In the inkjet head 2, the pitch between adjacent inkjet heads can be adjusted arbitrarily. Typically, the pitch is set to be the same as the pitch of the colored area. Alternatively, the pitch may be set to be wider than the pitch of the colored area. For example, when the pitch between the inkjet heads arranged in a row is wider than the pitch of the colored area, the inkjet heads 2 are rotated about the Z axis (the axis perpendicular to the glass substrate 1) to center the plurality of inkjet heads. The line connecting the lines is inclined with respect to the scanning direction of the inkjet head 2 (the direction parallel to the glass substrate 1). By appropriately setting the oblique angle, the pitch of the loci of ink ejected from the plurality of inkjet heads can be set to be the same as the pitch of the colored region. Control of ink ejection by the inkjet head 2 is performed by the inkjet head drive controller 8.

The XYθ table 3 has respective degrees of freedom of the rotation angle θ (centered on the Z axis) in the X and Y axis directions and in the XY plane, and the glass substrate 1 and the ink jet head 2 on the XYθ table 3 are provided. Allows relative scanning with. XY
The drive control of the θ table 3 is performed by the XYθ table drive control unit 9. If you can relatively scan,
The inkjet head 2 side may have a degree of freedom. Four
Is the pedestal of the device.

The input unit 5 is a device such as a keyboard for receiving a command input by the user. The display unit 6 is a display used for displaying an input menu when inputting with the input unit 5 and for monitoring the drive state of the device. It is a device.
The control unit 7 is a control device such as a CPU that controls each component, and typically uses a personal computer or the like.

2 and 3 are front views of the glass substrate 1. 2 and 3, each colored area is enlarged and displayed. FIG. 2 shows a glass substrate on which colored regions 21 are formed in an array called a stripe array.
FIG. 3 shows a glass substrate in which the colored regions 21 are formed in an array called a delta array. 2 and 3
Here, R represents a region colored with a red ink, G represents a region colored with a green ink, and B represents a region colored with a blue ink. In addition, each colored area 21
The upper left corner of is missing because the driving transistor is placed there.

The color filter of the stripe arrangement is RG
B is arranged in a stripe shape, suitable for displaying lines, figures, and characters, and is applied to a high-precision display used in a personal computer or the like. On the other hand, the delta array color filter
RGB are arranged so as to form a triangle, and a natural image display can be obtained, which is applied to a small-sized television or the like.
The effect of the present invention can be recognized in any of the sequences.

FIGS. 4 and 5 show how ink droplets are adhered to the same colored area 21 when the ink is ejected to each colored area 21 in plural times. In the present embodiment, the number of times ink is ejected to the same colored region 21 is two, and the time-dependent changes in the landed ink droplets are indicated by 23A to 23E. Colored area boundary 22
Indicates a portion other than the colored region 21 on the glass substrate 1.
In FIG. 4, when the ink is ejected during the first scan, the colored area 2
In No. 1, the ink droplet lands with a size of 23A (dotted line portion) (FIG. 4A). For example, when the nozzle diameter of the inkjet head 2 is Φ30 μm, the size is about Φ30 μm when it is separated from the nozzle, which is almost the same as the nozzle diameter. However, as soon as it adheres to the colored region 21, it spreads to the inner width for a predetermined time (about 20
After a lapse of (seconds), the state becomes like 23B.

After that state (23B), when the ink is ejected in the second scanning until the ink ejection amount reaches a predetermined amount, the landed ink droplet becomes an appropriate state like 23C. (FIG.4 (b)). This is because it is empirically estimated that the ink attached during the first scanning absorbs the ejection energy of the ink droplets that are ejected during the second scanning, and the rebound of the ink is reduced.

FIG. 5A shows how ink is ejected during the first scan (the same as FIG. 4A). As shown in FIG. 5B, even when the landing position is displaced due to the ink ejection during the second scanning (23D), it is appropriate as shown in 23E until the ink is solidified. It will be in a state. As for such a state change, it is empirically estimated that the surface tension of the ink adhered during the first scan attracts the ink ejected during the second scan, resulting in the state of 23E.

FIG. 6 is a flow chart showing the manufacturing process of the image display device in Example 1 (the control unit 7 automatically controls it). In step S61, the glass substrate 1
Are mounted on the XYθ table 3. In step S62,
Position adjustment is performed to match the position of each nozzle of the inkjet head 2 with the position of the colored region 21 on the glass substrate 1 that ejects ink. In step S63, the XYθ table drive controller 9 drives the XYθ table 3 to start relative scanning of the inkjet head 2 with respect to the glass substrate 1. In step S64, the inkjet head drive controller 8 causes the inkjet head 2 to eject ink to the corresponding colored region 21. Step S65
Then, the process is branched depending on whether the first scan is completed. When the scanning is completed, the process proceeds to step S66, and when the scanning is not completed, the process returns to step S64.

In step S66, the time elapsed after the first scan is completed is compared with a predetermined time (for example, 20 seconds). If the predetermined time has been reached, step S
67, and if the specified time has not been reached,
The process of step S66 is repeated. In step S67, the XYθ table drive control unit 9 drives the XYθ table 3 again to start relative scanning of the inkjet head 2 with respect to the glass substrate 1. In step S68,
The same colored area 21 on which ink is ejected during the first scan
Then, the ink is ejected again. In step S69, the process branches depending on whether the second scan is completed. If the scanning is completed, this process is terminated, and if not completed, the process returns to step S68.

As described above, in the image display device manufacturing apparatus and the manufacturing method thereof according to the first embodiment, a predetermined time (for example, 20 times) is performed after the ink is ejected to the arbitrary colored region 21 by the first scanning. Second), the ink adhering during the first scanning absorbs the ejection energy of the ink ejected during the second scanning, or the surface tension of the ink adhering during the first scanning causes 2
Due to the attraction of the ink ejected during the second scan,
The ink can be spread evenly on the colored regions 21, and color mixing with the adjacent colored regions 21 can be prevented.

The present invention has the same effect regardless of the type of inkjet method, the structure of the inkjet head, and the type of arrangement of the colored regions. That is,
In the inkjet method, it is effective for both the method of coloring by making the colored area have ink absorbency called the receptive layer and allowing the ink to soak into it, and the method of applying, drying and curing the resin in which the pigment is dispersed in the colored area. Is.

Further, the ink jet head 2 is an ink jet head having a structure in which the ink is ejected by the volume change in the actuator utilizing the deformation of the piezo element,
Alternatively, it is effective in any case of an inkjet head that ejects ink by utilizing thermal energy. In this embodiment, an example of a color filter manufacturing apparatus has been described, but materials other than ink, for example, organic EL elements are also effective.

<< Embodiment 2 >> An apparatus and method for manufacturing an image display device of Embodiment 2 will be described with reference to FIGS. The image display element manufacturing apparatus of the second embodiment has the same configuration as the image display element manufacturing apparatus of the first embodiment.
The image display device manufactured by the manufacturing apparatus of the second embodiment is the same as that of the first embodiment. In the image display device manufacturing apparatus and the manufacturing method thereof according to the second embodiment, ink of different properties (colors) is ejected from completion of ink ejection to an arbitrary colored region 21 to another colored region 21 adjacent to the colored region 21. It is characterized by having the function of adjusting the time until the start. In FIG. 7A, ink is ejected onto the colored region 21 (G),
Immediately after landing, the ink droplets are in a state like 23F, run off from the colored region 21 (G), and ride on the colored region boundary portion 22.

The colored area boundary portion 2 is set after a predetermined time.
The ink droplet 23F on 2 is repelled by the liquid repellency of the colored region boundary portion 22 and gradually pushed back into the colored region 21 (G), resulting in a state like 23G (FIG. 7B). Figure 7
In (c), after a predetermined time has passed (23G state), an ink having a property different from the ink ejected to the colored area 21 (G) is applied to the colored area 21 (B) adjacent to the colored area 21 (G).
The state immediately after being discharged is shown. In FIG. 7C, the ink droplet 23H runs off the colored area 21 (B) and rides on the colored area boundary portion 22, but is not mixed with the ink droplet 23G.

The predetermined time is, for example, 5 to 180 seconds when the ink in which the pigment is dispersed is used. This requires at least 5 seconds from immediately after landing (23F) to the state of 23G, and if the time difference after ink ejection of each colored region 21 is not 180 seconds or less, the solvent component in the components evaporates, and This is because it is empirically required that the thickness of the ink layer is not stable after drying in the process. Tables showing the relationship are shown in FIGS. 8 and 9.

FIG. 10 is a flow chart showing the manufacturing process of the image display element in Example 2 (the control section 7 automatically controls it). The colored regions 21 formed on the glass substrate 1 are assumed to have a stripe arrangement (FIG. 2). In step S101, the glass substrate 1 is mounted on the XYθ table 3. In step S102, position adjustment for matching the position of each nozzle of the inkjet head 2 with the position of the colored region 21 on the glass substrate 1 that ejects ink is performed. In step S103, the XYθ table drive controller 9 drives the XYθ table 3 to start relative scanning of the inkjet head 2 with respect to the glass substrate 1. In step S104, the inkjet head drive controller 8 causes the inkjet head 2 to eject the first ink (for example, red) to the corresponding colored region 21.

In step S105, the time elapsed from the ejection of the first ink is compared with a predetermined time (for example, 5 seconds). If the predetermined time has been reached, step S
When the process proceeds to 106 and the predetermined time has not been reached, the process of step S105 is repeated again. Step S1
In 06, the inkjet head drive control unit 8 causes the inkjet head 2 to eject the second ink (for example, green) to the corresponding colored region 21. Step S10
In 7, a comparison is made between the elapsed time from the ejection of the second ink and a predetermined time (for example, 5 seconds). If the predetermined time has been reached, the process proceeds to step S108, and if the predetermined time has not been reached, the process of step S107 is repeated again.

In step S108, the inkjet head drive controller 8 causes the inkjet head 2 to eject the third ink (for example, blue) onto the corresponding colored region 21. In step S109, the process branches depending on whether the scanning is completed. If the scanning has been completed, this processing is terminated, and if not completed, step S10.
Returning to step 4, the other area on the glass substrate 1 is colored.

As described above, in the image display device manufacturing apparatus and the manufacturing method thereof according to the second embodiment, from the completion of ink ejection to an arbitrary colored region 21 to another colored region 21 adjacent to the colored region 21. By setting the time to start the ejection of the ink of the above property from 5 seconds to 180 seconds,
It is possible to prevent ink color mixing between the adjacent colored regions 21.

The ink jet head 2 is either an ink jet head having a structure in which the volume of the actuator changes to eject ink by utilizing deformation of a piezo element, or an ink jet head in which ink is ejected by using thermal energy. Even if it is effective. Further, the present invention is effective in both the stripe arrangement and the delta arrangement. Further, although the present embodiment has described an example of a color filter manufacturing apparatus, it is also effective for materials other than ink, for example, organic EL elements.

<< Embodiment 3 >> An apparatus and method for manufacturing an image display device according to Embodiment 3 will be described with reference to FIGS. The image display element manufacturing apparatus of the third embodiment has the same configuration as the image display element manufacturing apparatus of the first embodiment. The image display device manufactured by the manufacturing apparatus of the third embodiment is the same as that of the first embodiment. The image display device manufacturing apparatus and the manufacturing method thereof according to the third embodiment include, in addition to the image display device manufacturing apparatus and the manufacturing method according to the first or second embodiment, one scan when ejecting ink onto the glass substrate 1. It is characterized by having the function of changing the ink color every time. One scan means that the inkjet head 2 moves one reciprocal movement relative to the glass substrate 1.

FIG. 11 is a diagram for explaining an example of a method of ejecting ink onto the glass substrate 1 in the third embodiment. Figure 1
In FIG. 1, the arrow indicates the scanning direction. In FIG.
For example, it indicates that R (red) is ejected on the first scan, B (blue) is ejected on the second scan, and G (green) is ejected on the third scan to be attached to a predetermined colored region 21.

FIG. 12 shows how ink droplets change with time when ink is ejected and adhered to each colored area 21 by the above method. FIG. 12A shows a state immediately after completion of ink ejection in the second scanning, and shows immediately after landing when ejection is performed to the colored region 21 (G) in the second scanning (ink color is green). The ink drops are in a state like 23F. At this time, the ink droplet 23F instantaneously spills over the colored region boundary portion 22, but as described in the second embodiment, the ink that spills out within the colored region boundary portion 22 within about 5 seconds. It is repelled by the liquid repellency and gradually pushed back to the colored region 21.
Here, the time required for one scan is about 30 seconds. Therefore, at the start of the third scan (ink color is blue), as shown in FIG.
As shown in (b), the state becomes 23G.

Therefore, as shown in FIG. 12C, even if the blue ink is ejected to the adjacent colored region 21 (B) and the state of 23H is reached immediately after the landing, the colored region 21 (G).
Color does not mix with the ink droplet 23G. Here, when a head of a certain color ejects ink, the other heads have a minimum number of ink droplets (when the head ejects ink It is possible to prevent clogging of the nozzle due to ink hardening by subtracting the amount and ejecting. For example, assuming that the number of ink droplets required to color a certain colored area 21 is m, when the head ejects ink to the colored area 21, (mn) ink droplets are ejected,
When another head ejects ink, the head
A droplet (n is the minimum number; m> n) of ink is ejected.

FIG. 13 is a flow chart showing the manufacturing process of the image display device in Example 3 (the control unit 7 automatically controls it). In step S1301, the glass substrate 1 is mounted on the XYθ table 3. Step S13
In 02, position adjustment is performed to match the position of each nozzle of the inkjet head 2 with the position of the colored region 21 on the glass substrate 1 that ejects ink. Step S1303
Then, the XYθ table drive control unit 9 causes the XYθ table 3 to operate.
Is driven to start relative scanning of the inkjet head 2 with respect to the glass substrate 1. In step S1304,
The inkjet head drive controller 8 causes the inkjet head 2 to eject the first ink (for example, red) to the corresponding colored region 21. In step S1305,
The process branches depending on whether the first scan is completed.
If the scanning is completed, the process proceeds to step S1306, and if not completed, the process returns to step S1304.

In step S1306, the XYθ table drive controller 9 drives the XYθ table 3 to start the second relative scanning of the ink jet head 2 with respect to the glass substrate 1. In step S1307, the inkjet head drive control unit 8 causes the inkjet head 2 to print the second ink (for example, green) on the corresponding colored region 21.
Is discharged. In step S1308, the process branches depending on whether the second scan is completed. If the scanning is completed, the process proceeds to step S1309, and if not completed, the process returns to step S1307.

In step S1309, the XYθ table drive controller 9 drives the XYθ table 3 to start the third relative scanning of the ink jet head 2 with respect to the glass substrate 1. In step S1310, the inkjet head drive control unit 8 causes the inkjet head 2 to print the third ink (for example, blue) on the corresponding colored region 21.
Is discharged. In step S1311, the process branches depending on whether the third scan is completed. If the scanning is completed, this process is terminated, and if it is not completed,
It returns to step S1310.

As described above, in the image display device manufacturing apparatus and the manufacturing method thereof according to the third embodiment, in addition to the method of the first or second embodiment, the ink color to be ejected is changed each time scanning is performed, and each color is changed. By ejecting in order, the same effect as that of the first or second embodiment is obtained, and further, it is effective for the color mixture defect analysis between colors.

The ink jet head 2 is either an ink jet head having a structure in which the volume of the actuator changes to eject ink by utilizing the deformation of a piezo element, or an ink jet head in which ink is ejected by using thermal energy. Even if it is effective. Further, the present invention is effective in both the stripe arrangement and the delta arrangement. Further, although the present embodiment has described an example of a color filter manufacturing apparatus, it is also effective for materials other than ink, for example, organic EL elements.

<< Embodiment 4 >> An apparatus and method for manufacturing an image display device of Embodiment 4 will be described with reference to FIGS. The image display element manufacturing apparatus of the fourth embodiment has the same configuration as the image display element manufacturing apparatus of the first embodiment. The image display device manufactured by the manufacturing apparatus of the fourth embodiment is the same as that of the first embodiment. The image display device manufacturing apparatus and the manufacturing method thereof according to the fourth embodiment include a glass substrate in which colored regions 21 are arranged in a delta shape in addition to the image display device manufacturing apparatus and the manufacturing method according to the first or second embodiment. It is characterized by having a function of adjusting the ejection order of the colored regions 21 in the ink coloring to 1. Usually, the delta array is
As shown in FIG. 15, colored regions 21 of three colors R (red), G (green), and B (blue) are arranged in a triangular shape or an inverted triangular shape. One pixel is formed by a plurality of groups. In the present embodiment, it is assumed that one group constitutes one pixel.

In the image display device manufacturing apparatus of the fourth embodiment, two distances (horizontal distance and vertical distance) between the colored regions 21 forming one pixel are set before the ink discharge to the glass substrate 1 is started. And the order of ejecting ink is determined so that the colored regions 21 adjacent to each other with the shorter side therebetween are not continuous. This method is effective in preventing color mixing with the ink adhering to the adjacent colored regions 21 when ejecting the ink.

FIG. 14 is a diagram showing groups forming one pixel in the delta array. In FIG. 14, L1 indicates the distance in the horizontal direction (between R and G), and L2 indicates the distance in the vertical direction (R
And between G and B). The user inputs the values of L1 and L2 from the input unit 5, for example, at the timing of changing the glass substrate 1. The control unit 7 compares the input values (L1, L2) and, for example, L1 <L2
In the case of, the discharge order is determined to be R → B → G or G → B → R. That is, when a certain colored area 21 is colored, then the colored area 21 located far from the colored area 21 is colored, and finally the colored area 21 located near the colored area 21 is colored. On the contrary, when L1> L2,
The discharge order is determined to be R → G → B or G → R → B. Information regarding the determined ejection order is transmitted to the inkjet head drive control unit 8, and the inkjet head drive control unit 8 controls the ejection of ink from the inkjet head 2 based on the information.

In order to ensure the effect of determining the ejection order based on the values of L1 and L2, one group and an inversely shaped group adjacent to the group are not colored at the same time (or at extremely short time intervals). . Example 4 (Fig. 1
In 5), the reverse triangular shape group (outgoing side group 24) is colored in the forward scanning path, and the triangular shape group (returning side group 25) is colored in the backward scanning path. The ejection nozzles of the inkjet head 2 may correspond to the respective colored regions 21, or the nozzles may be arranged every few pixels and may be divided into a plurality of ink ejections by reciprocating. Further, in one scan (reciprocal scan), not only on the outward path side,
Ink is ejected also on the return path side. This is because when ink in which pigment is dispersed is used, nozzle clogging may occur due to ink curing if ink is not ejected during backward scanning. By ejecting ink even during the backward scan, the non-ejection time can be shortened, and the number of nozzles can be reduced and the head structure can be simplified.

In FIG. 15, if L1 <L2, for example, the discharge order in the outward path is R → B → G (outgoing path side group 24). In the forward path, ink is ejected only to the colored area 21 of the forward path side group 24.
On the return trip, the order is changed from the forward trip and G → B → R
(Return side group 25). During the return pass, ink is ejected only to the colored region 21 of the return pass side group 25.

In the group, the next colored area 2
The time until ink is ejected to 1 is 5 seconds or more. When ink is ejected by this method, a certain colored region 21
When the ink is ejected onto the colored area 21, the ink that has landed on the colored area 21 that has already been ejected and is adjacent to the colored area 21 is colored to the extent that color mixing does not occur due to the liquid repellency of the substrate (colored area boundary 22). The probability that the ink has already been pushed back to the area 21 becomes higher, and the accuracy of color mixing prevention with the currently ejected ink can be improved. In addition, G → B →
The same effect can be obtained by setting R and the return path as R → B → G.

FIG. 16 is a flow chart showing the manufacturing process of the image display element in Example 4 (the control section 7 automatically controls it). In step S1601, the glass substrate 1 is mounted on the XYθ table 3. Step S16
In 02, position adjustment is performed to match the position of each nozzle of the inkjet head 2 with the position of the colored region 21 on the glass substrate 1 that ejects ink. Step S1603
Then, the distances (L1, L2) between the adjacent colored regions 21 are input from the input unit 5. In step S1604, the control unit 7 determines the order of ink types (colors) to be ejected based on the values of L1 and L2. Here, L1 <L2, and R
→ B → G.

In step S1605, the XYθ table drive controller 9 drives the XYθ table 3 to start relative scanning (outward path) of the ink jet head 2 with respect to the glass substrate 1. In step S1606, the inkjet head drive control unit 8 ejects ink from the inkjet head 2 to the corresponding colored region 21 of the outward path group 24 in the order (R → B → G) determined in step S1604. In step S1607, the process is branched depending on whether or not the ink ejection on the outward path is completed. If it is completed, the process proceeds to step S1608, and if it is not completed, the process returns to step S1606.

In step S1608, the XYθ table drive controller 9 drives the XYθ table 3 to start the backward scan of the glass substrate 1 of the ink jet head 2. In step S1609, the inkjet head drive control unit 8 moves the inkjet head 2 from the inkjet head 2 to the corresponding colored region 21 of the backward path group 25 in step S1.
Ink is ejected in a reverse order (G → B → R) to the order determined in 1604. In step S1610, the process is branched depending on whether the ink ejection on the return path is completed. If it is completed, this process is terminated, and if it is not completed, the process returns to step S1609.

As described above, in the image display device manufacturing apparatus and the manufacturing method thereof according to the fourth embodiment, in addition to the method of the first or second embodiment, each colored region forming one pixel in one scan is described. 21, the colored region 2
By deciding on the basis of the distance between 1, the same effect as the first or second embodiment can be obtained, and further, by ejecting the ink not only in the forward path but also in the backward path, the scanning time is not extended, Efficient and stable ink ejection can be performed.

The ink jet head 2 is either an ink jet head having a structure in which the volume of the actuator changes to eject ink by utilizing the deformation of a piezo element, or an ink jet head in which ink is ejected by using thermal energy. Even if it is effective. In addition, although the present embodiment describes the color filter manufacturing apparatus as an example, a material other than ink, for example, organic E
It is also effective for the L element.

[0076]

As described above, according to the image display device manufacturing apparatus and the manufacturing method thereof of the present invention, it is possible to reduce color mixture between pixels and efficiently manufacture a high quality image display device. Becomes

[Brief description of drawings]

FIG. 1 is a schematic view showing an image display device manufacturing apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram showing a glass substrate 1 in which colored regions 21 are formed in a stripe arrangement.

FIG. 3 is a diagram showing a glass substrate 1 in which colored regions 21 are formed in a delta arrangement.

FIG. 4 is a diagram (No. 1) showing a state change of ejected ink droplets in Example 1 of the present invention.

FIG. 5 is a diagram (No. 2) showing a change in state of ejected ink droplets in Example 1 of the present invention.

FIG. 6 is a flowchart showing a manufacturing process of the image display element according to the first embodiment of the present invention.

FIG. 7 is a diagram showing changes in the state of ejected ink droplets in Example 2 of the present invention.

FIG. 8 is a relationship table of a predetermined time and a color mixture state according to the second embodiment of the present invention.

FIG. 9 is a relationship table between a predetermined time and a film thickness state after drying according to the second embodiment of the present invention.

FIG. 10 is a flowchart showing a manufacturing process of the image display device according to the second embodiment of the present invention.

FIG. 11 is a diagram illustrating an example of a method of ejecting ink onto the glass substrate 1 according to the third embodiment of the present invention.

FIG. 12 is a diagram showing changes in the state of ejected ink droplets in Example 3 of the present invention.

FIG. 13 is a flowchart showing a manufacturing process of the image display device according to the third embodiment of the present invention.

FIG. 14 is a diagram showing groups forming one pixel on the glass substrate 1 in a delta arrangement.

FIG. 15 is a diagram illustrating a discharge order to a colored region 21 according to a fourth embodiment of the present invention.

FIG. 16 is a flowchart showing a manufacturing process of the image display device according to the fourth embodiment of the present invention.

FIG. 17 is a diagram illustrating a conventional method of coloring the colored region 21 of the image display element.

FIG. 18 is a diagram showing a state of ejected ink droplets in a conventional example.

[Explanation of symbols]

1 glass substrate 2 inkjet head 3 XYθ table 4 mounts 5 Input section 6 Display 7 control unit 8 Inkjet head drive controller 9 XYθ table drive controller 21 Colored area 22 Colored area boundary 23 ink drops 24 Outbound group 25 Return side group

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Claims (24)

[Claims] 1. An inkjet head having a plurality of ink ejection nozzles; and a scanning unit that relatively scans the inkjet head and a substrate on which a colored region for adhering ink is formed, the inkjet head comprising: An apparatus for manufacturing an image display element, wherein ink is ejected to the colored region in synchronization with the scanning by the scanning unit, and the ink is ejected to the same colored region in a plurality of scans. 2. An inkjet head having a plurality of ink ejection nozzles, and a scanning unit that relatively scans the inkjet head and a substrate on which a colored region to which ink is attached are formed. After the ink is ejected to the colored area in synchronization with the scanning by the scanning means and the ink is ejected to an arbitrary colored area, it is necessary to color the ink adjacent to the colored area with ink having different properties. An apparatus for manufacturing an image display element, characterized in that the ink is ejected to the colored region after a predetermined time has elapsed. 3. An ink jet head having a plurality of ink ejection nozzles, and a scanning unit that relatively scans the ink jet head and a substrate on which a colored region for adhering ink is formed. , The ink is ejected to the colored area in synchronization with the scanning by the scanning means, and the ink is ejected to the same colored area in a plurality of scans, and the ink is ejected to an arbitrary colored area. After that, the apparatus for manufacturing an image display element is characterized in that the ink is ejected to a colored area adjacent to the colored area and requiring coloring with ink having different properties after a predetermined time has elapsed. 4. The apparatus for manufacturing an image display device according to claim 2, wherein the predetermined time is 5 to 180 seconds. 5. The apparatus for manufacturing an image display element according to claim 1, wherein the ink color to be ejected is changed every time the scanning is performed by the scanning unit. 6. The number of droplets for ejecting one color to each of the colored regions for each scanning is from the number m of droplets to be ejected to one of the colored regions (m is a positive integer) to n (n is m). 6. A positive integer)> n is subtracted (mn), and the remaining n drops of ink are ejected when ejecting ink of another color in another scan. An apparatus for manufacturing an image display device according to item 1. 7. When coloring a substrate in which colored regions are arranged in a delta pattern, the inkjet head ejects ink in a predetermined order based on a mutual distance between a plurality of colored regions forming pixels. The manufacturing apparatus for an image display element according to claim 1, wherein 8. The ink-jet head has a plurality of colored regions forming pixels of any one shape among a plurality of colored regions forming triangular or inverted triangular pixels at the time of scanning or at the time of forward scanning. 8. The image display device according to claim 7, wherein the ink is ejected to the area, and the ink is ejected to a plurality of colored areas forming pixels of other shapes during another scanning or a returning path of the scanning. Manufacturing equipment. 9. The apparatus for manufacturing an image display element according to claim 1, wherein the inkjet head ejects red, green and blue inks. 10. The apparatus for manufacturing an image display element according to claim 1, wherein the ink jet head ejects ink using a piezo element. 11. The apparatus for manufacturing an image display element according to claim 1, wherein the inkjet head ejects ink by utilizing thermal energy. 12. The image display element manufacturing apparatus according to claim 1, wherein the image display element is a color filter. 13. A scanning step of relatively scanning an inkjet head having a plurality of ink ejection nozzles and a substrate on which a colored region for adhering ink is formed, and ink for the colored region in synchronization with the scanning. And a discharge step of discharging the ink to the same colored area by dividing the scan into a plurality of scans. 14. A scanning step of relatively scanning an inkjet head having a plurality of ink ejection nozzles and a substrate on which a colored region for adhering ink is formed, and ink for the colored region in synchronization with the scanning. And a discharge step of performing ink discharge to a colored area adjacent to the colored area that requires coloring with inks of different properties after a predetermined time has elapsed A method of manufacturing an image display device, comprising: 15. A scanning step of relatively scanning an inkjet head having a plurality of ink ejection nozzles and a substrate on which a colored region for adhering ink is formed, and ink for the colored region in synchronization with the scanning. And the ink is ejected to the same colored area by dividing it into a plurality of scans, and after the ink is ejected to an arbitrary colored area, the adjacent colored area is colored with ink of different properties. An ejecting step of ejecting ink to a required colored region after a predetermined time has elapsed, and a method for manufacturing an image display element. 16. The method of manufacturing an image display element according to claim 14, wherein the predetermined time is 5 to 180 seconds. 17. The method of manufacturing an image display element according to claim 13, wherein the ink color to be ejected is changed for each scanning. 18. In the discharging step, the number of droplets for discharging one color ink to one of the colored areas for each scanning is the number m of droplets to be discharged to one of the colored areas (m is a positive integer). ) Is subtracted from n (n is a positive integer satisfying m> n) (mn), and the remaining n drops of ink are discharged when another color of ink is discharged in another scan. The method for manufacturing an image display device according to claim 17, further comprising: 19. In the step of discharging, when coloring the substrate in which the colored regions are arranged in a delta shape,
17. The method for manufacturing an image display element according to claim 13, further comprising a process of ejecting ink in an order determined based on a mutual distance between a plurality of colored regions forming pixels. . 20. In the discharging step, a plurality of colored regions forming pixels of any one shape among a plurality of colored regions forming triangular or inverted triangular pixels at the time of scanning or at the forward path of scanning. 20. The method according to claim 19, further comprising the step of ejecting ink to the area, and ejecting ink to a plurality of colored areas forming pixels of another shape during another scan or a returning path of the scan. Of manufacturing image display element of. 21. The inkjet head is red,
21. The method for manufacturing an image display element according to claim 13, wherein green and blue inks are ejected. 22. The method of manufacturing an image display element according to claim 13, wherein the ink jet head ejects ink using a piezo element. 23. The method of manufacturing an image display element according to claim 13, wherein the ink jet head ejects ink by utilizing thermal energy. 24. The method of manufacturing an image display element according to claim 13, wherein the image display element is a color filter.