WO2013080841A1

WO2013080841A1 - Dispenser for liquid crystal display panel and dispensing method

Info

Publication number: WO2013080841A1
Application number: PCT/JP2012/080075
Authority: WO
Inventors: 泰典渡邉
Original assignee: シャープ株式会社
Priority date: 2011-11-28
Filing date: 2012-11-20
Publication date: 2013-06-06

Abstract

Provided is a dispenser that can draw a sealing pattern so as to accurately keep a gap between a substrate and a nozzle. A dispenser (100) is provided with: a syringe (12) having a nozzle (10) at one end; a vertical drive unit (40) that drives the nozzle (10) in a vertical direction (N1); a gap measuring device (20) that measures a gap between the nozzle (10) and a substrate (70); a rotational drive unit (30) that rotates the gap measuring device (20); and a control unit (35) that drives the nozzle (10) in the vertical direction (N1) so as to keep a gap that corresponds to a gap value measured by the gap measuring device (20), and rotates the gap measuring device (20) in correspondence with the drawing position so as to be positioned forward in the drawing direction (D1) of the nozzle (10).

Description

Dispenser for liquid crystal display panel and dispensing method

The present invention relates to a dispenser for manufacturing a liquid crystal display panel and a dispensing method using the dispenser. In particular, the present invention relates to a seal dispenser for drawing a seal pattern accurately corresponding to a gap between a substrate and a nozzle, and a dispensing method using the same.
This application claims priority based on Japanese Patent Application No. 2011-258533 filed on November 28, 2011, the entire contents of which are incorporated herein by reference. .

In general, a liquid crystal display device displays a desired image by individually supplying a data signal related to image information to each liquid crystal cell arranged in a matrix and adjusting the light transmittance of each liquid crystal cell. This is a display device obtained. Therefore, the liquid crystal display device includes a liquid crystal display panel in which liquid crystal cells in pixel units are arranged in a matrix, and a driver integrated circuit (IC) that drives the liquid crystal cells.

The liquid crystal display panel is composed of a color filter substrate and a thin film transistor substrate (array substrate) facing each other, and a liquid crystal layer filled in a distance between the color filter substrate and the thin film transistor array substrate. In order to manufacture such a liquid crystal display panel, first, a thin film transistor array substrate and a color filter substrate are individually manufactured. Next, the thin film transistor array substrate and the color filter substrate are aligned so as to maintain a uniform cell gap, and then cut into individual liquid crystal display panel units. In particular, in order to match the thin film transistor substrate and the color filter substrate, it is necessary to form a seal pattern on the outer periphery of the image display portion of each liquid crystal display panel.

A seal dispensing method has been proposed for forming this seal pattern (for example, Patent Document 1). According to this method, a predetermined pressure is applied to the syringe filled with the sealant while moving the table on which the substrate (thin film transistor array substrate or color filter substrate) constituting the liquid crystal display panel is placed in the front-rear and left-right directions. By applying, a seal pattern can be formed along the edge of the image display portion of the substrate. When forming a seal pattern in this way, it is required to precisely control the gap between the substrate and the syringe.

FIG. 8 is a conceptual diagram showing a configuration of a seal dispenser used in a conventional seal dispensing method. In the seal dispensing method using the seal dispenser shown in FIG. 8, after the substrate 401 is placed on the table 400, the user manually operates the micro gauge 406 to drive the vertical drive servo motor 405, whereby the main body 404. The syringe 403 attached to is lowered. At this time, the user detects whether or not the nozzle 402 provided at one end of the syringe 403 and the substrate 401 loaded on the table 400 are in contact with each other through monitoring of the value measured by the first sensor 407. To do.

When contact between the substrate 401 and the nozzle 402 is detected by the first sensor 407, the user manually operates the micro gauge 406 again to drive the vertical drive servo motor 405, whereby the syringe 403 attached to the main body 404. To raise. At this time, the user detects whether the gap between the substrate 401 and the nozzle 402 has reached a preset value through monitoring of the value measured by the second sensor 408, thereby operating the micro gauge 406. Interrupt. In this way, the gap between the substrate 401 and the nozzle 406 is controlled by a manual operation method.

Also, another conventional seal dispensing method has been proposed in order to overcome the problems of an increase in the defect occurrence rate of the liquid crystal display panel and a decrease in productivity when the above-described manual operation type seal dispensing method is used. FIG. 9 is a conceptual diagram showing a configuration of a seal dispenser used in another conventional seal dispensing method.

In the seal dispensing method using the seal dispenser shown in FIG. 9, the main body 504 to which the syringe 503 is attached is lowered by the vertical drive stepping motor 505 to determine whether the nozzle 502 of the syringe 503 and the substrate 501 are in contact with each other. To detect. When contact between the nozzle 502 and the substrate 501 is detected, the main body 504 is raised. Next, the gap between the nozzle 502 and the substrate 501 is detected, and the vertical drive stepping motor 505 is controlled so that the nozzle 502 and the substrate 501 have a desired gap. In this way, the gap between the substrate 501 and the nozzle 502 is controlled.

Japanese Patent Laid-Open No. 2004-199076

However, in the configuration of the seal dispenser shown in FIG. 8, the gap measuring device that is the second sensor 408 that detects the gap between the substrate 401 and the nozzle 402 is a fixed type, so when drawing a desired seal pattern, There is a case where the gap measuring device is located behind the nozzle 402 in the drawing direction D400. In such a case, the control of the gap of the nozzle 402 located behind the gap measuring device cannot catch up at a location where the substrate deflection changes sharply. As a result, since drawing is performed with a gap having a narrower interval than a gap having a desired interval, there is a problem in that an unstable seal having a cut shape or a narrow shape is formed. In particular, this problem has become prominent due to the influence of thinning of the substrate due to the recent increase in size and cost of the substrate. Further, in the configuration in which the opening portion exists in the stage of the seal dispenser, the influence of the deflection of the thinned substrate is large.

In the configuration of the seal dispenser shown in FIG. 9 as well, the gap measuring device that is a sensor 508 for detecting the gap between the substrate 501 and the nozzle 502 is a fixed type, and this fixed type gap measuring device is located immediately below the nozzle 502. A gap with the substrate 501 is measured. However, in this case as well, the gap control of the nozzle 502 corresponding to the substrate deflection cannot catch up at the location where the substrate deflection changes sharply. As a result, similarly, there may be a problem that the seal is broken or a narrow and unstable seal is formed.

The present invention has been made in view of such a point, and a main object thereof is to provide a seal dispenser and a seal dispensing method capable of drawing a seal pattern accurately following a gap between a substrate and a nozzle.

A dispenser according to the present invention is a dispenser for producing a liquid crystal display panel, a syringe having a nozzle at one end thereof, a vertical drive unit for driving the nozzle in the vertical direction along a vertical axis, the nozzle and the substrate. A gap measuring device for measuring a gap value of the nozzle, a rotary driving unit for rotating the gap measuring device, and the vertical driving unit so as to correspond to the gap value measured by the gap measuring device. And a control unit that rotates the gap measuring device so as to be positioned in front of the nozzle drawing direction by the rotation driving unit. A syringe having a nozzle at one end, a vertical drive unit that drives the nozzle in the vertical direction along the vertical axis, and a gap between the nozzle and the substrate at the front position provided in front of the drawing direction of the nozzle The nozzle is driven in the vertical direction so as to follow the gap measured by the gap measuring device by the gap measuring device that measures the gap, the rotation driving unit that rotates the gap measuring device, and the vertical driving unit. And a control unit that rotates the gap measuring device so as to be positioned in front of the drawing direction of the nozzle by the rotation driving unit.

In a preferred embodiment, the syringe is filled with a sealing material, and a sealing pattern surrounding an outline of an image display unit of the liquid crystal display panel is formed by the sealing material discharged from the nozzle of the syringe. .

In a preferred embodiment, the rotation driving unit rotates the gap measuring device at a corner portion of the seal pattern.

In a preferred embodiment, the seal pattern has a curved shape at the corner portion, and the control unit executes control to rotate the gap measuring device so as to correspond to the curved shape.

In a preferred embodiment, the gap measuring device includes a light emitting unit that irradiates the surface of the substrate with a laser, and a light receiving unit that receives the laser reflected from the substrate.

In a preferred embodiment, the substrate is a mother glass substrate in which a plurality of regions defining a liquid crystal display panel are arranged, and the mother glass substrate has a bending portion.

In a preferred embodiment, the syringe is filled with one selected from the group consisting of a liquid crystal material, an alignment film material, and a conductive material.

A dispensing method for a liquid crystal display panel according to the present invention is a dispensing method for a liquid crystal display panel using a dispenser of the liquid crystal display panel, and a step of measuring a gap between the nozzle of the dispenser and a substrate at a front position in the drawing direction (a And (b) rotating the gap measuring device for measuring the gap so that the nozzle is driven in the vertical direction so as to follow the measured gap and is positioned in front of the drawing direction. including.

In a preferred embodiment, the nozzle discharges a sealing material, and a sealing pattern of the liquid crystal display panel is formed by the sealing material.

In a preferred embodiment, the substrate is a mother glass substrate in which a plurality of regions defining a liquid crystal display panel are arranged, and the plurality of seal patterns are simultaneously formed by the seal material discharged from the plurality of nozzles. Is done.

In a preferred embodiment, one selected from the group consisting of a liquid crystal material, an alignment film material, and a conductive material is discharged from the nozzle.

According to the present invention, the nozzle is driven in the vertical direction so as to correspond to the gap value measured by the gap measuring device, and is positioned in front of the nozzle drawing direction by the rotation driving unit that rotates the gap measuring device. Rotate the gap meter as follows. Therefore, pattern drawing can be performed in a form that accurately corresponds to the gap value between the substrate and the nozzle.

It is a conceptual diagram which shows the structure of the seal dispenser of the liquid crystal display panel which concerns on one Embodiment of this invention. 4 is a flowchart for explaining a seal dispensing method using a seal dispenser of a liquid crystal display panel according to an embodiment of the present invention. It is a top view which shows the structure of the board | substrate (mother glass) 70 for demonstrating the seal | sticker dispensing method using the seal | sticker dispenser of the liquid crystal display panel which concerns on one Embodiment of this invention. It is a conceptual diagram which shows drawing of the seal pattern for demonstrating the seal dispensing method which concerns on one Embodiment of this invention. It is a conceptual diagram which shows drawing of the corner part of the seal pattern for demonstrating the seal | sticker dispensing method which concerns on one Embodiment of this invention. It is a conceptual diagram for demonstrating the modification of the dispensing method using the dispenser of the liquid crystal display panel which concerns on one Embodiment of this invention. It is a conceptual diagram for demonstrating the modification of the dispensing method using the dispenser of the liquid crystal display panel which concerns on one Embodiment of this invention. It is a figure which shows the structure of the seal dispenser of the conventional liquid crystal display panel. It is a figure which shows the structure of the seal dispenser of the conventional liquid crystal display panel.

Several preferred embodiments of the present invention will be described with reference to the drawings. Note that matters other than those specifically mentioned in the present specification and necessary for the implementation of the present invention (for example, the configuration and construction method of the liquid crystal panel) are designed by those skilled in the art based on the prior art in the field. It can be grasped as a matter. The present invention can be carried out based on the contents disclosed in the present specification and common general technical knowledge in the field.

Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS. In addition, in the following drawings, the same code | symbol is attached | subjected to the member and site | part which show the same effect | action, and the overlapping description may be abbreviate | omitted or simplified. In addition, the dimensional relationship (length, width, thickness, etc.) in each drawing does not necessarily accurately reflect the actual dimensional relationship. In addition, hatching in the drawing is given mainly for the purpose of easy understanding of the constituent elements, and does not necessarily represent the elements of the material. The present invention is not limited to the following embodiment.

FIG. 1 is a cross-sectional view showing a configuration of a seal dispenser 100 of a liquid crystal display panel according to an embodiment of the present invention. A seal dispenser 100 shown in FIG. 1 has a nozzle 10 at one end, and includes a syringe 12 that is filled with a sealing material 50 and a vertical drive unit 40 that drives the nozzle 10 in the vertical direction along a vertical axis. .

Also, the seal dispenser 100 of the present embodiment includes a gap measuring device 20 that measures the value of the gap G1 between the nozzle 10 and the substrate 70. The gap measuring device 20 of the present embodiment is provided in front of the drawing direction D1 (the drawing direction of the sealing material 50 of the seal dispenser 100) in the nozzle 10, and the nozzle 10 and the substrate 70 at a position in front of the drawing direction D1. The value of the gap G1 is measured.

Furthermore, the seal dispenser 100 includes a rotation drive unit 30 such as a rotation motor that rotates the gap measuring device 20. In addition, the seal dispenser 100 includes a control unit 35 that controls the operations of the vertical drive unit 40 and the rotation drive unit 30. The control unit 35 of the present embodiment drives the nozzle in the vertical direction N1 by the vertical driving unit 40 so as to correspond to the value of the gap G1 measured by the gap measuring device 20, and uses the rotary driving unit 30 to drive the nozzle 10. Control is performed to rotate the gap measuring device 20 so as to be positioned in front of the drawing direction D1. That is, in the seal dispenser 100 of the present embodiment, the height of the nozzle 10 can be automatically adjusted to an appropriate position following the gap G1 that changes for each position of the substrate 70, and the value of the gap G1. Can use what is located ahead of the drawing direction D1 of the nozzle 10.

The gap measuring device 20 in the present embodiment includes a light emitting unit 20A that irradiates the surface of the substrate 70 with a laser 21 and a light receiving unit 20B that receives the laser 21 reflected from the substrate 70. The light emitting unit 20A is, for example, a semiconductor laser, and the light receiving unit 20B is, for example, a photodiode.

Further, the substrate 70 shown in FIG. 1 is a glass substrate (glass substrate for a liquid crystal display panel) constituting the liquid crystal display panel. In the illustrated example, the substrate 70 is a mother glass substrate before being cut out to the dimensions of the liquid crystal display panel, and the substrate 70 has a bending portion 70A. The thickness of the substrate 70 is, for example, 0.7 mm or less, and the flexible portion 70A is likely to occur due to its thinness.

The dimension of the mother glass substrate 70 shown in the figure is 1 meter or more on one side. Specifically, when the substrate 70 is a 10th generation mother glass, the dimension is 2880 mm (W) × 3130 mm (L). The substrate 70 is not limited to the mother glass substrate before being cut out to the dimensions of the liquid crystal display panel, but may be glass having the size of the liquid crystal display panel after being cut out. Further, the substrate 70 may be an array substrate on which a thin film transistor (TFT) is manufactured (or a product in the middle of manufacturing), or a CF substrate on which a color filter (CF) is formed (or a device in the middle of manufacturing thereof). It may be.

The syringe 12 of the seal dispenser 100 of this embodiment is filled with the seal material 50, and the seal material 50 is discharged from the nozzle 10 located at the tip of the syringe 12. The discharged seal material 50 forms a seal pattern that surrounds the outline of the image display portion of the liquid crystal display panel. The image display unit of the liquid crystal display panel is an area for displaying an image in the liquid crystal display panel. In the case of the configuration of the present embodiment, each color of red (R), green (G), and blue (B) is displayed. The pixel area is arranged and an image is displayed by the plurality of pixel areas. A seal pattern made of the seal material 50 is formed between the array substrate and the CF substrate so as to surround the outer shell of the image display portion.

FIG. 2 shows a flowchart for executing the seal dispensing method using the seal dispenser 100 of the present embodiment.

As shown in FIG. 2, first, in step S1, the gap measuring device 20 is used to measure the gap G1 between the nozzle 10 and the substrate 70 at the front position of the nozzle 10 in the drawing direction D1. The gap G1 measured by the gap measuring device 20 is, for example, in the range of 0.03 mm to 0.05 mm.

Next, in step S2, based on the control of the control unit 35, the vertical driving unit 40 moves the nozzle 10 in the vertical direction N1 based on the gap G1 measured in step S1, along the seal pattern forming region. Then, the sealing material 50 is drawn. Here, the nozzle 10 is adjusted so as to have a predetermined interval (for example, 0.035 mm) with respect to the substrate 70.

Next, in step S3, it is determined whether or not the drawing position of the seal material 50 has arrived at the corner portion of the seal pattern. If the drawing position has arrived at the corner of the seal pattern (Yes in step S3), the process proceeds to step S4. On the other hand, when the drawing position has not arrived at the corner portion of the seal pattern (No in step S3), the process returns to step S2, and the same operation as described above is repeated.

Next, when it is determined that the drawing position of the seal material 50 has arrived at the corner portion of the seal pattern, the rotation drive unit 30 performs the gap measurement while continuing the drawing based on the control of the control unit 35 in step S4. The vessel 20 is rotated.

Next, in step S5, it is determined whether or not the drawing of the seal pattern in the region corresponding to one liquid crystal display panel (that is, one liquid crystal cell) is completed. When it is determined that the drawing of the seal pattern for one liquid crystal cell is completed, the process proceeds to step S6. On the other hand, when it is determined that it has not been completed, the process returns to step S2, and the same operation as described above is repeated.

Next, when it is determined that the drawing of the seal pattern for one liquid crystal cell has been completed, the process moves to the next liquid crystal cell in step S6, and steps S1 to S5 are repeated. Thereafter, in step S7, it is determined whether or not drawing up to the last liquid crystal cell is completed. When the drawing up to the last liquid crystal cell has been completed (Yes in step S7), the series of steps is completed. On the other hand, if the drawing up to the last liquid crystal cell has not been completed (No in step S7), the process returns to step S6 to complete the drawing up to the last liquid crystal cell.

Further, the seal dispensing method of the present embodiment will be described with reference to FIGS.

FIG. 3 is a plan view of the substrate 70 for explaining a seal dispensing method using the seal dispenser 100 of the present embodiment. FIG. 3 shows a configuration in which regions (each liquid crystal cell) 90 corresponding to one liquid crystal display panel are arranged in a matrix on a substrate (mother glass substrate) 70. In the configuration shown in FIG. 3, a plurality of nozzles 10 are arranged.

FIG. 4 is a conceptual diagram for explaining the seal dispensing method according to the present embodiment, and shows the drawing of the seal pattern 50P in one liquid crystal cell 90. FIG. 5 shows a drawing of the corner portion R40 of the seal pattern 50P.

As shown in FIG. 3, in the seal dispensing method using the seal dispenser 100 according to the present embodiment, a substrate 70 (for example, a 10th generation mother glass substrate) is held on a table (gantry table) provided with a gantry 80. Yes. On the substrate 70, regions (liquid crystal cells) 90 corresponding to one liquid crystal display panel are arranged in a matrix. Then, the seal pattern 50P is drawn so as to surround the outline of the image display unit of the liquid crystal cell 90 in order for each liquid crystal cell 90.

Here, the drawing method of the seal pattern 50P in one liquid crystal cell 90 will be described in detail. As shown in FIG. 4, the drawing of the sealing material 50 is started from the start point ST of the seal pattern 50P, and the drawing is ended at the end point EP of the seal pattern 50. Specifically, first, the nozzle 10 of the seal dispenser 100 is set to the start point ST, and is arranged so that the gap measuring device 20 is positioned at the head and the nozzle 10 is positioned behind the head in the drawing direction D1 of the seal pattern 50P. .

Next, a gap between the substrate 70 and the nozzle 10 is measured by the gap measuring device 20, and the vertical driving unit 40 moves the nozzle 10 in the up and down direction N1 (see FIG. 1) corresponding to the gap. Specifically, the vertical drive unit 40 moves the nozzle 10 in the vertical direction N1 (see FIG. 1) based on the control of the control unit 35, and discharges the sealing material 50 from the nozzle 10 while performing the control. Then, the image is drawn in the drawing direction D1 (here, the horizontal direction).

Next, horizontal drawing is continued while moving the gantry 80 in the horizontal direction (vertical direction) X1 (see FIG. 3) until the drawing position of the sealing material 50 reaches the region R40 at the corner of the liquid crystal cell 90. . When the corner region R40 is reached, based on the control of the control unit 35, the rotation driving unit 30 rotates the gap measuring device 20 leftward by, for example, 90 °. In this way, the gap measuring device 20 can always measure the gap between the substrate 70 and the nozzle 10 in front of the nozzle 20 along the shape of the seal pattern 50P.

Also, when reaching the corner region R40, the nozzle 10 is moved in the vertical direction X1 and in the width direction Y1. In this way, the drawn seal pattern 50P can be formed in a curved shape as shown in FIG. 5 in the corner region R40.

That is, until the drawing position of the seal pattern 50P enters the corner area R40, the seal pattern 50P is moved in the drawing direction D1a which is the vertical direction X1. When the drawing position of the seal pattern 50P enters the corner region R40, the drawing direction of the seal pattern 50P draws the corner R by moving the nozzle 10 in the vertical direction X1 and simultaneously moving in the width direction Y1. The drawing direction is D1b. When the drawing position of the seal pattern 50P exits the corner region R40, the nozzle 10 is moved in the drawing direction D1c, which is the width direction Y1. By making the corner region R40 into a curved shape in this way, the seal pattern 50P can be drawn continuously as compared with the case of forming a 90 ° right-angled corner, and as a result, the shape of the seal pattern 50P is stable. It can be made.

Then, when the drawing position of the nozzle 10 moving in the drawing direction D1c enters the next corner area, the rotation driving unit 30 further controls the gap measuring device 20 based on the control of the control unit 35 as described above. Turn 90 ° counterclockwise. At this time, the seal pattern 50P in the region of the corner portion 40R can be formed in a curved shape by moving the nozzle 10 in the width direction Y1 and in the vertical direction X1.

By repeating such an operation, the drawing for one liquid crystal cell is completed when the drawing of the seal pattern 50P reaches the end point EP. In this way, drawing for one liquid crystal cell for 90 minutes can be executed continuously. Thereafter, the head of the nozzle 10 is lifted up once, moved to the next liquid crystal cell 90, and drawing for the liquid crystal cell 90 is performed in the same manner as described above, and finally drawing for all the liquid crystal cells 90 is performed. Complete.

It should be noted that the position where the gap measuring instrument 20 is rotated is preferably registered as a pattern recipe in the control unit 35 in advance by specifying the XY coordinates and the movement amount as position information. That is, when the position registered as the pattern recipe is reached, the gap measuring device 20 is rotated based on the position information.

As described above, according to the dispenser 100 of this embodiment, the nozzle 10 is driven in the vertical direction N1 so as to correspond to the value of the gap G1 measured by the gap measuring device 20, and the rotation for rotating the gap measuring device 20 is performed. The gap measuring device 20 is rotated by the drive unit 30 so as to be positioned in front of the drawing direction D1 of the nozzle 10. Therefore, it is possible to perform pattern drawing that accurately follows the gap between the substrate 70 and the nozzle 10 regardless of the position of the nozzle 10 in the seal pattern 50P. That is, since the gap measuring device 20 is always located in front of the drawing direction of the nozzle 10, the gap G1 between the nozzle 10 and the substrate 70 in the front position of the nozzle 10 is always measured regardless of the shape of the drawing pattern. can do. As a result, by moving the nozzle 10 in the vertical direction according to the measured gap G1, drawing can be realized in a form that accurately corresponds to the gap G1 between the nozzle 10 and the substrate 70.

In particular, due to the recent increase in the size of the substrate 70 and / or the reduction in the thickness of the substrate 70 resulting from cost reduction, the substrate 70 is likely to have a bending portion 70A. Under such circumstances, the embodiment of the present invention. The technical significance of is great. That is, even when the bending portion 70A of the substrate 70 exists and there is a steep change there, according to the technique of the present embodiment, the accurate seal pattern 50P can be formed stably.

(Modification example)
6 and 7 are cross-sectional views for explaining a modified example of the dispenser 100 and the dispensing method using the dispenser 100 according to the embodiment of the present invention. In the above-described embodiment, the dispenser 100 is used for forming the seal pattern 50P. However, the dispenser 100 according to the embodiment of the present invention is not limited thereto, and can be used for other applications.

In a modified example of the present embodiment, a liquid crystal material is applied on the substrate using the dispenser 100. Specifically, instead of the nozzle 10 filled with the sealing material 50 described above, the liquid crystal dropping nozzle 10 filled with the liquid crystal material 150 is used as shown in FIG. Apply to. Also in this modified example, even if the deflection portion 70A exists in the substrate 70 and the gap between the nozzle 10 and the substrate 70 changes steeply, the gap measuring device 20 positioned in front of the application direction in front of the nozzle 10 will be described. By the measurement, the interval between the nozzle 10 and the substrate 70 can be made appropriate. That is, by rotating the gap measuring device 20 in accordance with the application direction, the application process is executed while adjusting the distance between the nozzle 10 and the substrate 70 even if the bending portion 70A exists on the substrate 70. Can do.

Further, in the configuration shown in FIG. 6, the alignment film material dropping nozzle 10 is used instead of the liquid crystal dropping nozzle 10 filled with the liquid crystal material 150 instead of the nozzle 10 filled with the alignment film material. It is also possible to apply the alignment film material onto the substrate 70.

In addition, instead of the nozzle 10 filled with the sealing material 50 described above, a conductive layer is formed on the substrate 70 using the nozzle 10 filled with a conductive material 160 (for example, silver particles) as shown in FIG. It can also be applied to forming. When the conductive layer is formed of the conductive material 160, since the control of the thickness and width of the conductive layer is required to be more precise, the bending portion 70A is applied to the substrate 70 using the technique of the embodiment of the present invention. Even in the case where there is, there is great technical significance in that a stable and accurate application process can be executed by making the interval between the nozzles 10 constant.

As mentioned above, although the specific example of this invention was demonstrated referring drawings, these are only illustrations and do not limit a claim. The technology described in the claims includes various modifications and changes of the specific examples illustrated above. For example, the elements of the above-described embodiments can be applied to each other.

According to the present invention, it is possible to provide a seal dispenser and a seal dispensing method capable of drawing a seal pattern accurately following the gap between the substrate and the nozzle.

DESCRIPTION OF SYMBOLS 10 Nozzle 12 Syringe 20 Gap measuring device 20A Light emission part 20B Light reception part 21 Laser 30 Rotation drive part 35 Control part 40 Vertical drive part 50 Seal material 50P Seal pattern 70 Substrate (mother glass substrate)
70A Deflection site 80 Gantry 90 Liquid crystal cell 100 Seal dispenser 150 Liquid crystal material 160 Conductive material

Claims

A dispenser for producing a liquid crystal display panel,
A syringe having a nozzle at one end;
A vertical drive unit for driving the nozzle in the vertical direction along the vertical axis;
A gap measuring device for measuring a value of a gap between the nozzle and the substrate;
A rotation drive for rotating the gap measuring device;
The vertical driving unit drives the nozzle in the vertical direction so as to correspond to the gap value measured by the gap measuring device, and the rotational driving unit positions the nozzle in front of the drawing direction of the nozzle. And a controller for rotating the gap measuring device.
The syringe is filled with a sealing material,
2. The dispenser according to claim 1, wherein a seal pattern surrounding an outline of an image display unit of the liquid crystal display panel is formed by the seal material discharged from the nozzle of the syringe.
The dispenser according to claim 2, wherein the rotation driving unit rotates the gap measuring device at a corner portion of the seal pattern.
The seal pattern has a curved shape at the corner portion,
The dispenser according to claim 3, wherein the control unit executes control to rotate the gap measuring device so as to correspond to the curve shape.
The gap measuring device
A light emitting unit for irradiating the surface of the substrate with a laser;
The dispenser according to any one of claims 1 to 4, further comprising: a light receiving unit that receives the laser reflected from the substrate.
The substrate is a mother glass substrate in which a plurality of regions defining a liquid crystal display panel are arranged,
The dispenser according to any one of claims 1 to 5, wherein the mother glass substrate has a deflection portion.
The dispenser according to claim 1, 5 or 6, wherein the syringe is filled with one selected from the group consisting of a liquid crystal material, an alignment film material and a conductive material.
A dispensing method using a dispenser for producing a liquid crystal display panel,
A step (a) of measuring a value of a gap between the nozzle of the dispenser and the substrate at a front position in a drawing direction;
(B) rotating the gap measuring instrument for measuring the gap so that the nozzle is driven in the vertical direction so as to correspond to the measured value of the gap and is positioned in front of the drawing direction; Dispensing method including.
The nozzle discharges a sealing material;
The dispensing method according to claim 8, wherein a seal pattern of the liquid crystal display panel is formed by the seal material.
The substrate is a mother glass substrate in which a plurality of regions defining a liquid crystal display panel are arranged,
The dispensing method according to claim 9, wherein a plurality of the seal patterns are simultaneously formed by the seal material discharged from the plurality of nozzles.
10. The dispensing method according to claim 9, wherein one selected from the group consisting of a liquid crystal material, an alignment film material, and a conductive material is discharged from the nozzle.