KR102116715B1 - Seal dispenser and gap controlling method thereof - Google Patents

Abstract

The gap control method of the seal dispenser according to the present invention includes: performing a gap control in a first period in a gap control unit, and performing a gap control in a second period in a corner portion in the gap control unit, and in the second period Is characterized in that it is longer than the first cycle.

Description

Seal dispenser and its gap control method {SEAL DISPENSER AND GAP CONTROLLING METHOD THEREOF}

The present invention relates to a seal dispenser and a gap control method therefor.

The liquid crystal display device includes a first substrate provided with a color filter layer, a second substrate arranged with driving elements, a sealant (also known as paste) pattern for attaching the first substrate and the second substrate, and first and second substrates And a liquid crystal layer positioned between them. When manufacturing a liquid crystal display, a sealant pattern is formed on a first substrate or a second substrate. The first substrate or the second substrate on which the sealant pattern is formed is collectively referred to as a substrate. A seal dispenser is a device that forms a sealant pattern by applying a sealant to such a substrate. In order to form an accurate sealant pattern, the seal dispenser includes a displacement sensor that measures the distance from the substrate to the head unit that applies the sealant. In general, the displacement sensor is configured to measure a distance from an object including a light emitting unit that outputs light and a light receiving unit that receives light reflected by an object to be measured.

Conventional seal dispensers operate to apply a sealant to a substrate while measuring the distance to the substrate using a displacement sensor. However, in the conventional seal dispenser, there is a problem in that the quality of the sealant is poor in the process of applying the sealant.

Registered Patent: 10-0965903, Registration Date: June 16, 2010, Title: Control method of the seal dispenser device.

An object of the present invention is to provide a yarn dispenser and a method of operating the same, which prevents a distance measurement error and enables a more accurate distance measurement in a yarn dispenser that applies a sealant by measuring a distance to a substrate using a displacement sensor. .

A gap control method of a seal dispenser according to an exemplary embodiment of the present invention includes: performing a gap control in a first cycle in a gap control unit; And performing a gap control in a second period from the corner portion in the gap control unit, wherein the second period is longer than the first period.

In an embodiment, the step of performing the gap control in the first period is characterized in that it further comprises the step of measuring the distance between the nozzle and the substrate in the first period in the displacement sensor.

In an embodiment, the step of performing the gap control in the second period is characterized in that it further comprises the step of measuring the distance between the nozzle and the substrate in the second period in the displacement sensor.

In an embodiment, the method further includes maintaining a first gap height at a distance between the nozzle and the substrate in a section other than the corner portion.

In an embodiment, the method further includes maintaining a distance between the nozzle and the substrate at the corner at a second gap height, and the second gap height is lower than the first gap height.

In an embodiment, the corner portion is characterized by including the applied seal line.

In an embodiment, the gap correction period is varied when riding on the coated seal line.

In an embodiment, when performing the gap control in the first period, it characterized in that it further comprises the step of moving the dispensing head unit at a first motion speed.

In an embodiment, when performing the gap control in the second cycle, further comprising moving the dispensing head unit at a second motion speed, the second motion speed is slower than the first motion speed Is done.

Seal dispenser according to an embodiment of the present invention, provided on the top of the frame, a stage for loading a substrate on which a predetermined liquid is dispensed; A head support provided on an upper portion of the stage; And at least one dispensing head unit provided on the head support and dispensing a predetermined liquid, wherein the at least one dispensing head unit includes: a displacement sensor measuring a distance between a nozzle and the substrate; And a gap control unit adjusting a distance between the substrate and the nozzle, wherein the gap control unit varies a gap control period in a corner portion having a previously applied seal line.

In an embodiment, the gap control unit is characterized in that the gap control is performed in a first period in a region other than the corner portion.

In an embodiment, the gap control unit is characterized in that the corner portion performs gap control in a second period slower than the first period.

In an embodiment, the gap control section is characterized in that the first gap height is maintained in an area other than the corner portion.

In an embodiment, the gap control unit is characterized in that the corner portion maintains a second gap height lower than the first gap height.

In an embodiment, the at least one dispensing head unit is characterized in that application is performed at a first motion speed in an area other than the corner portion.

In an embodiment, the at least one dispensing head unit is characterized in that the corner portion is applied at a second motion speed slower than the first motion speed.

In an embodiment, the gap control unit is characterized in that the nozzle receives information related to a gap control cycle through a separate input / output pin before entering the corner portion.

In an embodiment, the gap control unit is characterized in that, whenever data is output from the input / output pins, a predetermined number is incremented by one step and adjusted to a target gap corresponding to a corresponding predetermined number.

In an embodiment, the displacement sensor is characterized in that it outputs the measured distance data to the gap control unit in a first cycle in a region other than the corner portion.

In an embodiment, the displacement sensor is characterized in that it outputs the measured distance data from the corner to the gap control unit in a second period slower than the first period.

The seal dispenser according to an embodiment of the present invention and its gap control method can improve the gap control precision by controlling according to a separate gap control method in the applied corner portion while maintaining the gap height substantially constant.

1 is a view showing a typical seal dispenser (1) by way of example.
2 is a view showing an exemplary dispensing head unit 100 according to an embodiment of the present invention.
3 is a timing diagram exemplarily showing an operation of controlling a gap height between a nozzle and a substrate in the gap control unit 160 according to an embodiment of the present invention.
4 is a timing diagram exemplarily showing an operation of controlling an application motion speed in the gap control unit 160 according to an embodiment of the present invention.
5 is a view exemplarily showing results before and after applying a gap control method according to an embodiment of the present invention.
6 is a flowchart exemplarily showing a gap control method of a seal dispenser according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, when adding reference numerals to the components of each drawing, it should be noted that the same components have the same reference numerals as possible even though they are displayed on different drawings. In addition, in describing the present invention, when it is determined that detailed descriptions of related well-known structures or functions may obscure the subject matter of the present invention, detailed descriptions thereof will be omitted. In addition, a preferred embodiment of the present invention will be described below, but the technical spirit of the present invention is not limited to or limited thereto, and can be variously implemented by a person skilled in the art.

1 is a view showing a typical seal dispenser (1) by way of example. Referring to FIG. 1, the seal dispenser 1 is provided on the upper part of the frame 3 and the frame 3, and the stage 5 and the stage 5 for loading the substrate S on which a predetermined liquid is dispensed. It may include a head support (7) provided on the top, a dispensing head unit (9) provided on the head support (7) for dispensing a predetermined liquid. In an embodiment, the stage 5 may be configured to be driven in the X-axis or Y-axis direction. In an embodiment, the head support 7 may be installed to be movable linearly in the Y-axis direction from the top of the frame 3 by the drive motor 8. In an embodiment, the dispensing head unit 9 may be positioned in the Z-axis direction to adjust the relative position with the substrate, and may also be driven in the X-axis or / and Y-axis direction.

The seal dispenser 1 may move the stage 5 in the X-axis and Y-axis directions to form a sealant pattern along the periphery of the edge region of the substrate S. Of course, the dispensing head unit 9 may move in the X-axis and Y-axis directions to apply the sealant to the substrate S. In addition, both the stage 5 and the dispensing head unit 9 may move in the X-axis and Y-axis directions to apply the sealant, the stage 5 moves in one axial direction, and the dispensing head unit 9 ) May be applied in the direction of the other axis to apply the sealant. At this time, the transfer unit moves the stage 5 or the dispensing head unit 9 using a motor, a rail, or the like. Of course, various other means of transportation can be used.

2 is a view showing an exemplary dispensing head unit 100 according to an embodiment of the present invention.

 Dispensing head unit 100 is provided with a nozzle 110, the syringe 120 to provide a sealant to the substrate (S), the syringe 120 is mounted fixed body portion 130, the nozzle 110 and the substrate ( Displacement sensor 140 for detecting a gap between S), a driving unit 150 for moving the body portion 130 in the vertical direction, and a gap control unit 160 for adjusting the gap between the substrate S and the nozzle 110 It may include.

The dispensing head unit 100 may apply the sealant in the syringe 120 to the substrate S through the nozzle 110 while the body 130 moves in the X-axis and Y-axis directions. At this time, the displacement sensor 140 measures the gap between the substrate S and the nozzle 110, and moves the body portion 320 up and down through the driving unit 150 according to the measurement result, and the substrate S and The gap between the nozzles 110 can always be kept constant. Through this, the sealant pattern formed along the circumference of the edge of the substrate S may be formed in a constant line shape.

The displacement sensor 140 may use a distance measuring sensor using light (for example, a laser displacement sensor). In particular, the displacement sensor 140 may be implemented to generate and receive a laser beam, and to calculate a distance corresponding to a time corresponding thereto. That is, the displacement sensor 140 may be a time of flight (TOF) sensor. The displacement sensor 140 may include a light emitting part and a light receiving part. The light emitting unit may be implemented to output a laser beam. The light receiving unit may be implemented to detect a laser beam.

In an embodiment, the displacement sensor 140 may measure the distance between the nozzle 110 and the substrate S according to a gap control period (or frequency).

Seal dispenser according to an embodiment of the present invention, while maintaining a substantially constant gap height in the corner (corner area) by controlling according to a separate gap control method, it is possible to increase the gap control precision. In an embodiment, the corner portion may be an area that intersects when the Y-direction seal line is applied to the X-direction applied seal line. In another embodiment, the corner portion may be a portion that meets when applying the seal line in the X-axis direction and the seal line in the Y-axis direction. It should be understood that the corner portion of the present invention is not limited to this, and the corner portion may include a previously applied seal line.

3 is a timing diagram exemplarily showing an operation of controlling a gap height between the nozzle 110 and the substrate S in the gap control unit 160 according to an embodiment of the present invention.

In an embodiment, the gap control period of the present invention may be shorter than that of the conventional one to increase the degree of gapping. The general gap control method has a control period of 1 ms or more, and thus limits the gap control degree. This is because the effect on glass bending is large. On the other hand, the gap control method according to an embodiment of the present invention has a gap control period of 0.1 ms. The gap control period of the present invention can increase the gap control precision as much as it is shorter than the conventional one.

In an embodiment, the gap control unit 160 may be implemented to adjust (adjust) the gap correction period when riding over the seal line as the gap correction period is shortened. In an embodiment, the gap control unit 160 may include a separate IO pin receiving a separate gap correction period (scan delay). For example, the gap control unit 160 receives a separate gap correction period, that is, a corner gap IO control signal, from a predetermined corner portion through a separate IO pin, and responds to the received corner gap IO gap control signal. The calibration period can be varied.

In an embodiment, the gap control unit 160 may be implemented to receive a high level corner gap IO control signal from the corner unit. A scan delay signal may be generated in response to the corner gap IO control signal.

In an embodiment, PT number means an order in which a target gap is determined. A different target gap may be defined for each PT number. In an embodiment, whenever IO (input / output data) is output, the PT number is increased by one step, and a target gap corresponding to the PT number can be adjusted. Although not shown, when performing the application of the seal line, there are a plurality of PT numbers, and the height of the target gap for each PT number can be determined.

In an embodiment, the gap control unit 160 may determine the corner portion based on the IO control signal received before entering the corner portion.

In an embodiment, the gap control unit 160 may be implemented to generate a high level scan delay signal at the corner portion. The gap correction period may be longer in response to the scan delay signal.

In an embodiment, the gap control unit 160 moves the dispensing head unit 100 to the first gap height H1 before entering the corner portion, and after entering the corner portion, dispenses to the second gap height H2 The head unit 100 can be moved. Here, the second gap height H2 is lower than the first gap height H1. In an embodiment, the corner gap may be a value associated with the distance at which the second gap height H2 is maintained.

4 is a timing diagram exemplarily showing an operation of controlling an application motion speed in the gap control unit 160 according to an embodiment of the present invention. Referring to FIG. 4, the application motion speed is gradually increased while starting the gap control. At this time, the applied motion speed is increased from the initial motion speed Vi to a first predetermined motion speed V1, and then remains constant until entering the corner. As it enters the corner, the application motion speed is gradually reduced. At this time, the applied motion speed is reduced to a predetermined second motion speed V2 and then remains constant until it passes the corner. Thereafter, the coating motion speed is gradually increased and increases to the first motion speed V2. In an embodiment, the corner gap may be a distance at which the second motion speed V2 is maintained.

3 and 4, the gap height (gap height) is increased from the corner start (corner start) to the target gap (H1) and then slightly lowered at the corner, the application motion speed is constant velocity (V1) when maintaining the target gap )to be.

5 is a view exemplarily showing results before and after applying a gap control method according to an embodiment of the present invention. Referring to FIG. 5, the difference in the gap height of the conventional gap control method is large, whereas the gap control method of the present invention can maintain the gap height between the nozzle and the substrate substantially constant. According to the gap control method of the present invention, the gap control precision is increased.

6 is a flowchart exemplarily showing a gap control method of a seal dispenser according to an embodiment of the present invention. 1 to 6, the gap control method of the seal dispenser is as follows.

The seal dispenser may perform gap control in the first cycle (S110). Here, the first period may be a period corresponding to high speed. For example, the first period may be 0.1 ms. That is, the displacement sensor 140 (see FIG. 2) can measure the distance between the nozzle 110 (see FIG. 2) and the substrate S every 0.1 ms. However, it should be understood that the first cycle of the present invention is not limited to these values. In an embodiment, when performing the gap control in the first cycle, the dispensing head unit 100 may be moved at the first motion speed V1. The seal dispenser may perform gap control in the second cycle in the applied seal line (S120). Here, the second cycle is longer than the first cycle. Information about the applied seal line is stored in advance. In an embodiment, when performing gap control in a second period, the dispensing head unit 100 may be moved at a second motion speed. Here, the second motion speed V2 is slower than the first motion speed V1.

Seal dispenser according to an embodiment of the present invention is provided on the top of the frame, a stage for loading a substrate on which a predetermined liquid is dispensed, a head support provided on the top of the stage; And at least one dispensing head unit provided on the head support and dispensing a predetermined liquid, wherein the at least one dispensing head unit includes a displacement sensor for measuring a distance between the nozzle and the substrate, and between the substrate and the nozzle. It includes a gap control unit for adjusting the distance, and the gap control unit is characterized by varying the gap control period in a corner portion having a previously applied seal line.

In an embodiment, the gap control unit 160 (refer to FIG. 2) is characterized in that the gap control is performed in the first period in the region other than the corner portion, and the gap control is performed in the second period slower than the first period in the corner portion.

In an embodiment, the gap control unit 160 maintains the first gap height H1 in an area other than the corner portion, and maintains the second gap height H2 lower than the first gap height H1 in the corner portion. It is characterized by.

In an embodiment, the at least one dispensing head unit 100 (see FIG. 2) performs application at a first motion speed V1 in an area other than a corner, and is slower than a first motion speed V1 at a corner. Characterized in that the coating is performed at a second motion speed (V2).

In an embodiment, the gap control unit 160 is characterized in that it receives information related to the gap control period through a separate input / output pin before the nozzle 110 enters the corner portion. In an embodiment, the gap control unit 160 is characterized in that, whenever data is output from the input / output pins, a predetermined number is incremented by one step and adjusted to a target gap corresponding to a corresponding predetermined number.

In an embodiment, the displacement sensor 140 (refer to FIG. 2) outputs distance data measured to the gap control unit in a first period in a region other than a corner portion, and measures the gap control unit in a second period slower than the first period in the corner portion. Characterized in that it outputs the distance data.

The above description is merely illustrative of the technical spirit of the present invention, and those of ordinary skill in the art to which the present invention pertains may make various modifications, changes, and substitutions without departing from the essential characteristics of the present invention. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical spirit of the present invention, but to explain the scope of the technical spirit of the present invention. . The scope of protection of the present invention should be interpreted by the claims below, and all technical spirits within the equivalent range should be interpreted as being included in the scope of the present invention.

1: thread dispenser
9, 100: Dispensing head unit
110: nozzle
120: syringe
130: body
140: displacement sensor
142: light emitting unit
144: light receiving section
150: driving unit
160: gap control

Claims (20)

In the gap control method of the seal dispenser:
Performing a gap control in a first cycle in the gap control unit; And
And performing a gap control in a second cycle at a corner portion in the gap control unit.
The step of performing the gap control in the first cycle includes measuring a distance between the nozzle and the substrate in the first cycle in the displacement sensor,
The step of performing the gap control in the second cycle includes measuring the distance between the nozzle and the substrate in the second cycle in the displacement sensor,
The method of claim 2, wherein the second period is longer than the first period. delete delete According to claim 1,
And maintaining a first gap height at a distance between the nozzle and the substrate in a section other than the corner portion. The method of claim 4,
Further comprising the step of maintaining the distance between the nozzle and the substrate at the corner portion at a second gap height,
The method of claim 2, wherein the second gap height is lower than the first gap height. According to claim 1,
The corner portion comprises a seal line applied. The method of claim 6,
The method of claim 1, wherein the gap correction period is varied when riding on the coated seal line. According to claim 1,
And when dispensing the gap in the first period, moving the dispensing head unit at a first motion speed. The method of claim 8,
When performing the gap control in the second cycle, further comprising the step of moving the dispensing head unit at a second motion speed,
And the second motion speed is slower than the first motion speed. A stage provided on an upper portion of the frame and loading a substrate on which a predetermined liquid is dispensed; A head support provided on an upper portion of the stage; And at least one dispensing head unit provided on the head support and dispensing a predetermined liquid,
The at least one dispensing head unit includes: a displacement sensor that measures a distance between the nozzle and the substrate; And a gap control unit adjusting a distance between the substrate and the nozzle,
The gap control unit varies the gap control period in a corner portion having a previously applied seal line,
The gap control unit performs gap control in a first period in a region other than the corner portion, and performs gap control in a second period slower than the first period in the corner portion,
The displacement sensor outputs the distance data measured to the gap control unit in a first period in a region other than the corner unit, and outputs the measured distance data to the gap control unit in a second period slower than the first period in the corner unit. Seal dispenser, characterized in that. delete delete The method of claim 10,
The gap control part maintains a first gap height in a region other than the corner portion. The method of claim 13,
The gap control unit maintains a second gap height lower than the first gap height at the corner portion. The method of claim 10,
The at least one dispensing head unit is a yarn dispenser, characterized in that for performing the application at a first motion speed in the area other than the corner. The method of claim 15,
The at least one dispensing head unit seal dispenser, characterized in that for performing the application at a second motion speed slower than the first motion speed in the corner portion. The method of claim 10,
The gap controller receives the information related to the gap control cycle through a separate input / output pin before the nozzle enters the corner portion. The method of claim 10,
The gap controller increases the predetermined number by one step each time data is output from the input / output pins, and adjusts to a target gap corresponding to the corresponding predetermined number. delete delete

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