KR102037055B1 - Dispenser capable of preventing pollution of nozzle, and dispensing methode for gap filling using thereof and fabricating method of liquid crystal display device - Google Patents

Dispenser capable of preventing pollution of nozzle, and dispensing methode for gap filling using thereof and fabricating method of liquid crystal display device Download PDF

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Publication number
KR102037055B1
KR102037055B1 KR1020120143039A KR20120143039A KR102037055B1 KR 102037055 B1 KR102037055 B1 KR 102037055B1 KR 1020120143039 A KR1020120143039 A KR 1020120143039A KR 20120143039 A KR20120143039 A KR 20120143039A KR 102037055 B1 KR102037055 B1 KR 102037055B1
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South Korea
Prior art keywords
nozzle
resin
liquid crystal
air
dispenser
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KR1020120143039A
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Korean (ko)
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KR20140074744A (en
Inventor
손해준
전우혁
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엘지디스플레이 주식회사
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/1303—Apparatus specially adapted to the manufacture of LCDs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/01—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with manually mechanically or electrically actuated piston or the like
    • B05C17/0143—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with manually mechanically or electrically actuated piston or the like comprising means for cutting or cleaning the cartridge nozzle tip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0204—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work for applying liquid or other fluent material to the edges of essentially flat articles

Abstract

The dispenser of which the nozzle contamination is prevented, the gap filling dispensing method using the same, and the manufacturing method of the liquid crystal display device are provided in the gap filling dispensing for bonding the cover glass of the panel and the touch panel while protecting the pad part. The cleaning device is installed on the nozzle to spray the air vertically to clean the nozzle, thereby effectively preventing the nozzle contamination, and to prevent the resin unapplied defect by detecting the nozzle clogging through the sensor during dispensing. The dispenser comprises a nozzle for applying the resin; And a cleaning device installed on the nozzle to inject air vertically toward the nozzle.

Description

DISPENSER CAPABLE OF PREVENTING POLLUTION OF NOZZLE, AND DISPENSING METHODE FOR GAP FILLING USING THEREOF AND FABRICATING METHOD OF LIQUID CRYSTAL DISPLAY DEVICE}

The present invention relates to a dispenser in which nozzle contamination is prevented, a gap filling dispensing method using the same, and a manufacturing method of a liquid crystal display device in gap filling dispensing for protecting a pad part.

In today's information society, display devices are increasingly being emphasized as visual information transmission media, and in order to gain a major position in the future, display devices must satisfy requirements such as low power consumption, thinness, light weight, and high quality.

The display device includes a cathode ray tube (CRT), an electroluminescent element (EL), a light emitting diode (LED), a vacuum fluorescence display (VFD), Emission type and liquid crystal such as organic light emitting device (OLED), field emission display (FED), plasma display panel (PDP), electrophoresis display Like a liquid crystal display (LCD), it can be divided into a non-light emitting type which does not emit light by itself.

Among them, a liquid crystal display device is a display device in which data signals according to image information are individually supplied to pixels arranged in a matrix, and a desired image is displayed by adjusting light transmittance of the pixels.

Accordingly, the liquid crystal display includes a liquid crystal panel in which pixels are arranged in a matrix and a driving unit for driving the pixels.

The liquid crystal panel includes a color filter substrate and an array substrate bonded together to maintain a uniform cell gap facing each other, and a liquid crystal layer formed in a cell gap between the color filter substrate and the array substrate. do.

In this case, a common electrode and a pixel electrode are formed in the liquid crystal panel to which the color filter substrate and the array substrate are bonded to apply an electric field to the liquid crystal layer.

Therefore, when the voltage of the data signal applied to the pixel electrode is controlled while the voltage is applied to the common electrode, the liquid crystal of the liquid crystal layer rotates by dielectric anisotropy according to the electric field between the common electrode and the pixel electrode. Characters or images are displayed by transmitting or blocking light for each pixel.

Hereinafter, a general liquid crystal display device will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view schematically illustrating a structure of a general liquid crystal display device.

As shown in the drawing, a general liquid crystal display device includes a liquid crystal panel 10 in which pixels are arranged in a matrix to output an image, driving units 15 and 16 for driving the pixels, and a rear surface of the liquid crystal panel 10. It is configured to include a backlight unit for emitting light over the entire surface of the liquid crystal panel 10 and a panel guide 45 for storing and fixing the liquid crystal panel 10 and the backlight unit.

In this case, although not shown, the liquid crystal panel 10 includes a color filter substrate and an array substrate bonded together to maintain a uniform cell gap facing each other, and a liquid crystal layer formed in a cell gap between the color filter substrate and the array substrate.

A common electrode and a pixel electrode are formed on the liquid crystal panel 10 where the color filter substrate and the array substrate are bonded to each other to apply an electric field to the liquid crystal layer, and the data is applied to the pixel electrode while a voltage is applied to the common electrode. When the voltage of the signal is controlled, the liquid crystal of the liquid crystal layer rotates by dielectric anisotropy according to the electric field between the common electrode and the pixel electrode to transmit or block light for each pixel to display characters or images.

In order to control the voltage of the data signal applied to the pixel electrode for each pixel, a switching element such as a thin film transistor (TFT) is individually provided in the pixels.

Upper and lower polarizers (not shown) are attached to the outer side of the liquid crystal panel 10 configured as described above, the lower polarizer polarizes light passing through the backlight unit, and the upper polarizer is the liquid crystal panel 10. Polarize the light via).

In detail, the backlight unit is provided with a light emitting diode (LED) assembly 30 for generating light on one side of a light guide plate 42 and a rear surface of the light guide plate 42. The reflector 41 is provided.

In this case, the LED assembly 30 is an LED housing (32) to which the LED array 31 and an LED printed circuit board (PCB) (not shown) for driving the LED array 31 are attached. Is done.

The light emitted from the LED array 31 is incident on the side of the light guide plate 42 made of a transparent material, and the reflective plate 41 disposed on the rear surface of the light guide plate 42 is transmitted to the rear surface of the light guide plate 42. The light is reflected toward the optical sheets 43 on the upper surface of the light guide plate 42 to reduce light loss and improve uniformity.

The liquid crystal panel 10 including the color filter substrate and the array substrate is seated on the upper portion of the backlight unit configured as described above through the panel guide 45, and the liquid crystal panel 10, the panel guide 45, and the backlight unit are screwed. A screw is coupled to each other by the lower case 50 and the upper case 60 to form a liquid crystal display device.

In this case, a mobile product such as a mobile phone is vulnerable to an external shock such as a drop, and when such a shock is applied, a shock is concentrated at the edge of the pad region of the array substrate, thereby causing a product to be broken or a pad part to be damaged.

That is, as described above, the liquid crystal panel 10 is formed by combining an upper color filter substrate and a lower array substrate, and one side of the array substrate is formed to protrude relative to the color filter substrate. This is because the pad region is formed on one side of the array substrate that does not overlap the color filter substrate. Since the pad region is left as an empty space when the liquid crystal panel 10 is combined with the cover glass of the touch panel (not shown), the pad region becomes a portion where the impact is concentrated when an external impact is applied.

An object of the present invention is to provide a gap filling dispensing method and a method of manufacturing a liquid crystal display device using the same to protect the pad part from external impact.

Another object of the present invention is to provide a dispenser capable of preventing nozzle contamination or nozzle clogging in the gap filling dispensing, a gap filling dispensing method using the same, and a method of manufacturing a liquid crystal display device.

Other objects and features of the present invention will be described in the configuration and claims of the invention which will be described later.

In order to achieve the above object, the dispenser of the nozzle contamination prevention of the present invention in the dispenser to form a pressure-sensitive adhesive layer for bonding to the cover glass of the touch panel by applying a resin to the edge of the pad region of the array substrate, The nozzle for applying the resin; And a cleaning device installed on the nozzle to inject air vertically toward the nozzle.

At this time, the cleaning device is characterized in that it has a circular shape surrounding the nozzle.

The cleaning device is further characterized in that it further comprises an air passage having a form that is connected from the outside to surround the nozzle.

In this case, when the cross section of the nozzle has a rectangular shape, the air passage is characterized in that the surrounding of the nozzle in the form of a rectangle.

The cleaning device is characterized in that it further comprises a control device for setting the pressure and the cleaning time of the air.

The gap filling dispensing method of the present invention comprises the steps of loading a liquid crystal panel on a table; Sensing whether there is residual resin through the sensor while the dispenser is located in the cleaning unit; Proceeding with preliminary application of the resin in the cleaning unit, and simultaneously detecting whether or not the resin is uncoated through the sensor; Cleaning the nozzle of the dispenser using a cleaning device; And moving the dispenser to an application position of the table, and applying a resin to a corner of the panel region of the liquid crystal panel.

In this case, when residual resin is detected, the nozzle of the dispenser is cleaned using a cleaning device.

When the unapplied resin is detected, the system is down, and after determining the cause of the unapplied resin, the system is normalized.

According to an aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device, the method including: providing a liquid crystal panel in which an image is bonded by a color filter substrate and an array substrate; Loading the liquid crystal panel on a table; Sensing whether there is residual resin through the sensor while the dispenser is located in the cleaning unit; Proceeding with preliminary application of the resin in the cleaning unit, and simultaneously detecting whether or not the resin is uncoated through the sensor; Cleaning the nozzle of the dispenser using a cleaning device; Moving the dispenser to an application position of the table and applying a resin to a corner of the panel region of the array substrate; And curing the applied resin to form an adhesive layer, and attaching the cover glass of the touch panel to the liquid crystal panel.

In this case, when residual resin is detected, the nozzle of the dispenser is cleaned using a cleaning device.

When the unapplied resin is detected, the system is down, and after determining the cause of the unapplied resin, the system is normalized.

The opposite side of the sensor is installed with a reflector is characterized in that it detects whether the resin is applied through the sensor and the reflector and whether the remaining resin remains.

The cleaning of the nozzle of the dispenser is characterized by using a cleaning device provided on the nozzle.

At this time, the cleaning device is characterized in that for vertically injecting air toward the nozzle.

As described above, the dispenser in which the nozzle contamination is prevented, the gap filling dispensing method using the same, and the manufacturing method of the liquid crystal display device according to the present invention, in the gap filling dispensing, by installing a cleaning device on the nozzle of the dispenser to provide air By spraying vertically to clean the nozzle, it effectively prevents the nozzle contamination, while detecting the clogging of the nozzle through the sensor during dispensing, it provides the effect of preventing the unpainted defect.

1 is an exploded perspective view schematically illustrating a structure of a general liquid crystal display device.
2 and 3 are plan views schematically illustrating the structure of a liquid crystal display according to an exemplary embodiment of the present invention.
4 is a flowchart sequentially illustrating a method of manufacturing a liquid crystal display device according to an exemplary embodiment of the present invention.
FIG. 5 is a flowchart specifically illustrating a module process in the method of manufacturing a liquid crystal display according to the exemplary embodiment of the present invention shown in FIG. 4.
6 is a cross-sectional view schematically showing a gap filling dispensing method according to an embodiment of the present invention.
7 is a flowchart sequentially illustrating an example of a gap filling dispensing method according to an embodiment of the present invention.
8 is a cross-sectional view schematically showing the structure of a gap filling dispenser according to an embodiment of the present invention.
9 is a view illustrating a lower structure of the cleaning device in the gap filling dispenser according to the embodiment of the present invention shown in FIG. 8.
10 is a flowchart sequentially illustrating another example of a gap filling dispensing method according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the dispenser prevented nozzle contamination according to the present invention, a gap filling dispensing method using the same and a method of manufacturing a liquid crystal display device having a common knowledge in the art It will be described in detail so that it can be easily performed.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, only the present embodiments to make the disclosure of the present invention complete, and common knowledge in the art to which the present invention pertains. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

2 and 3 are plan views schematically illustrating the structure of a liquid crystal display according to an exemplary embodiment of the present invention, and show a liquid crystal display as an example of the display device.

3 illustrates a structure of the liquid crystal display device in which the cover glass of the touch panel is coupled to the liquid crystal panel shown in FIG. 2.

Referring to the drawings, a liquid crystal display device according to an embodiment of the present invention is a liquid crystal panel 110 that is arranged in a matrix form to output an image, the liquid crystal panel 110 is installed on the rear of the liquid crystal panel 110 A backlight unit (not shown) for emitting light over the entire surface of the liquid crystal panel 110 and a case component (not shown) for accommodating and fixing the backlight unit.

The liquid crystal panel 110 is a liquid crystal formed in the cell gap between the color filter substrate 101 and the array substrate 102 and the color filter substrate 101 and the array substrate 102 bonded together so as to maintain a uniform cell gap facing each other. It consists of layers (not shown).

Although not shown, the color filter substrate 101 distinguishes between a color filter composed of a plurality of sub-color filters for implementing red, green, and blue colors and the sub-color filters. And a black matrix for blocking light passing through the liquid crystal layer, and a transparent common electrode for applying a voltage to the liquid crystal layer.

In addition, the array substrate 102 is formed on the pixel region and the thin film transistor, which is a switching element formed in a cross-section of the gate line and the data line, the plurality of gate lines and data lines, which are arranged vertically and horizontally to define a plurality of pixel regions. It consists of a pixel electrode. In this case, in the case of an in-plane switching (IPS) type liquid crystal display, a common electrode is formed on the array substrate 102 instead of the color filter substrate 101.

Upper and lower polarizers (not shown) are attached to the outside of the liquid crystal panel 110 configured as described above, the lower polarizer polarizes light passing through the backlight unit, and the upper polarizer is the liquid crystal panel 110. Polarize the light via).

Although not shown, the backlight unit will be described in detail. A reflector is installed on a lower case, and an array of light emitting diodes (LEDs) for generating light is provided on at least one side of the reflector. A light guide plate for emitting light generated by the LED array toward the liquid crystal panel 110 is installed in the light emitting direction of the array.

In this case, the LED assembly may include a plurality of LED arrays and an LED housing to which an LED printed circuit board (PCB) for driving the LED array is attached.

The light emitted from the LED array is incident on the side of the light guide plate made of a transparent material, and the reflector disposed on the rear surface of the light guide plate reflects the light transmitted through the rear surface of the light guide plate toward the optical sheets on the upper surface of the light guide plate to reduce the loss of light. Reduce and improve uniformity.

The liquid crystal panel 110 formed of the color filter substrate 101 and the array substrate 102 is seated on the upper portion of the backlight unit configured as described above through a panel guide (not shown), and the liquid crystal panel 110 and the panel guide and The backlight unit is coupled to each other by a lower case and an upper case (not shown) through a plurality of fastening means such as screws to form a liquid crystal display.

In this case, a touch panel (not shown) is attached to the liquid crystal panel 110 to input letters or pictures more easily and elaborately, wherein the cover glass 111 of the touch panel is adhered. The layer 118 is attached to the corner of the liquid crystal panel 110.

As described above, the liquid crystal panel 110 is formed by combining the color filter substrate 101 positioned above and the array substrate 102 positioned below, wherein one side of the array substrate 102 is a color filter substrate 101. It is formed to protrude compared to). This is because the pad region 102a in which the pad portion 115 is formed is located at one side of the array substrate 102 that does not overlap the color filter substrate 101.

An integrated circuit chip (not shown) may be mounted in the pad region 102a of the liquid crystal panel 110 configured as described above in a chip on glass manner, and a protective film (not shown) is disposed around the integrated circuit chip. The pad electrode is formed to cover and protect pad electrodes (not shown) formed in the pad region 102a. In addition, a flexible printed circuit board (FPCB) 117 connected to the pad unit 115 of the liquid crystal panel 110 includes chip-on-film electronic components (not shown) for processing driving signals. It may be mounted in an on film), and a connector (not shown) for transmitting an external signal to the flexible circuit board 117 may be installed.

The flexible circuit board 117 may be folded to the rear of the liquid crystal panel 110 so that the flexible circuit board 117 may face the rear surface of the liquid crystal panel 110.

Anisotropic conductive film (ACF) may be used to electrically connect the pad portion 115 of the array substrate 102 and the connection portion of the flexible circuit board 117 to each other.

In this case, in the exemplary embodiment of the present invention, an empty space between both sides of the pad region 102a and the cover glass 111 is filled with an adhesive layer 118 made of a resin having elasticity and adhesive strength, and thus external impact. It is characterized in that it is possible to prevent damage to the product or damage to the pad unit 115 by.

That is, the pad portion 115 of the liquid crystal panel 110 may be protected from external impact during the direct bonding process of the cover glass 111 and at the same time between the cover glass 111 and the liquid crystal panel 110. In order to improve the degree of adhesion of the resin, the space between the sides of the pad region 102a and the cover glass 111 is filled with a resin having elasticity and adhesion. The resin thus filled is cured to form a predetermined adhesive layer 118. And a process of forming the adhesive layer 118 is referred to as gap filling in the sense of filling empty spaces.

As described above, in the case of a mobile product such as a mobile phone, even if an external impact such as a drop is applied, a predetermined adhesive layer 118 is provided at the edge of the pad region 102a of the array substrate 102 and thus the product is damaged by absorbing the external impact. Or damage to the pad unit 115 can be prevented.

On the other hand, the adhesive layer 118 may be formed by applying a resin to the dispenser (dispenser) after curing, the present invention by installing a cleaning device on the nozzle of the dispenser by spraying the air (vertical) vertically By effectively cleaning the nozzle, it is possible to effectively prevent contamination of the nozzle, and by detecting the nozzle clogging through the sensor during dispensing, thereby preventing the resin unapplied defect in advance. This method of manufacturing a liquid crystal display device according to an embodiment of the present invention It will be described in detail through.

4 is a flowchart sequentially illustrating a method of manufacturing a liquid crystal display device according to an exemplary embodiment of the present invention.

5 is a flowchart specifically illustrating a module process in the method of manufacturing a liquid crystal display device according to an exemplary embodiment of the present invention illustrated in FIG. 4.

4 illustrates a method of manufacturing a liquid crystal display device when the liquid crystal layer is formed by the liquid crystal dropping method, for example. However, the present invention is not limited thereto, and the present invention forms the liquid crystal layer by the liquid crystal injection method. It is also applicable to the manufacturing method of a liquid crystal display device in this case.

In addition, although the liquid crystal display device is described as an example of the display device as described above, the present invention is not limited thereto, and the present invention is also applicable to other flat panel display devices such as an organic light emitting display device and an electrophoretic display device.

The manufacturing process of the liquid crystal display device may be largely divided into a driving element array process of forming a driving element on a lower array substrate, a color filter process of forming a color filter on an upper color filter substrate, a cell process, and a module process.

In this case, the cell process is a general process for injecting and bonding liquid crystals using the completed array substrate and the color filter substrate to form an alignment layer, a liquid crystal, a sealant, and a spacer, and to align and bond the array substrate and the color filter substrate. Means.

In addition, the module process is a process for manufacturing a circuit for signal processing, connecting the liquid crystal panel and the signal processing circuit unit by the mounting technology, and attaching a mechanism to produce a module.

First, a plurality of gate lines and data lines that are arranged on an array substrate to define a pixel region are formed by an array process, and thin film transistors, which are driving elements connected to the gate lines and data lines, are formed in each of the pixel regions (S101). ). In addition, the pixel electrode is connected to the thin film transistor through the array process to drive the liquid crystal layer as a signal is applied through the thin film transistor.

In addition, a color filter layer and a common electrode are formed on the color filter substrate, the color filter layer including red, green, and blue sub-color filters that implement color by a color filter process (S102). In this case, when manufacturing a transverse electric field type liquid crystal display device, the common electrode is formed on an array substrate on which the pixel electrode is formed through the array process.

Subsequently, in the cell process, after the alignment films are printed on the color filter substrate and the array substrate, the alignment control force or the surface fixing force (ie, the pretilt angle) is applied to the liquid crystal molecules of the liquid crystal layer formed between the color filter substrate and the array substrate. ) And an orientation direction) is rubbed on the alignment layer (S103 and S104).

A sealing material is applied to the rubbed color filter substrate as described above to form a predetermined failure turn, and a liquid crystal is dropped on the array substrate to form a liquid crystal layer (S105 and S106).

In this case, the color filter substrate and the array substrate are manufactured by dividing a plurality of the mother substrate with a large area. In other words, a plurality of panel regions are defined in a large area mother substrate, and thin film transistors and color filters, which are driving elements, are formed in each of the panel regions.

In this case, the dropping method uses a dispenser to drop and dispense liquid crystals in an image display area of a first mother substrate having a large area in which a plurality of array substrates are arranged or a second mother substrate in which a plurality of color filter substrates are disposed. The liquid crystal layer is formed by uniformly distributing the liquid crystals to the entire image display region by the pressure for bonding the first and second mother substrates together.

Therefore, when the liquid crystal layer is formed on the second mother substrate through a dropping method, a failure turn should be formed in a closed pattern surrounding the pixel area region to prevent the liquid crystal from leaking out of the image display region.

The dropping method can drop the liquid crystal in a short time compared to the vacuum injection method, and can form the liquid crystal layer very quickly even when the liquid crystal panel is enlarged. In addition, since only the required amount of liquid crystal is dropped on the substrate, the price competitiveness of the liquid crystal panel due to the disposal of the expensive liquid crystal is prevented, such as vacuum injection, thereby strengthening the product's price competitiveness.

Thereafter, the first mother substrate and the second mother substrate are bonded together by the sealing material by applying pressure while the liquid crystal is dropped and the first mother substrate and the second mother substrate coated with the sealing material are aligned as described above. The liquid crystal dropped by the application of pressure is spread evenly over the entire liquid crystal panel (S107).

By such a process, a plurality of unit liquid crystal panels having a liquid crystal layer are formed on the first and second mother substrates having a large area, and the first and second mother substrates are processed and cut and separated into a plurality of unit liquid crystal panels. (S108).

Subsequently, in the module process, the unit liquid crystal panel and the signal processing circuit part are connected by the mounting technology, and then the apparatus is attached to produce the module (S109).

That is, for this purpose, before the polarizers are attached to the upper and lower surfaces of the liquid crystal panel, a cleaning process for removing foreign substances existing on the surface of the liquid crystal panel in advance is performed (S109-1).

Subsequently, the liquid crystal panel is cleaned, and then the release film of the polarizing plate is peeled off to attach the polarizing plates to the upper and lower surfaces of the liquid crystal panel (S109-2).

Then, the TAB (Tape Automatic Bonding) is attached to the pad portion of the liquid crystal panel, and the TAB has an integrated circuit (IC) therein and is separated from the flexible printed circuit board in each pixel region of the liquid crystal panel. It is a medium that serves to supply a signal (S109-3). Punching in a TCP (Tape Carrier Package) state to a size that can be attached to the liquid crystal panel, and attaching it to the pad portion of the liquid crystal panel using an anisotropic conductive film is called a TAB attachment process.

Subsequently, after a predetermined defoamation, a signal input from the outside is divided into a control signal and a data signal and sent to the TCP, and the printed circuit board is supplied to the TCP to supply a voltage to drive the liquid crystal panel. (S109-4, S109-5).

Subsequently, a cover glass of the touch panel is attached on the liquid crystal panel (S109-6).

In addition, the backlight assembly is assembled to the lower part of the liquid crystal panel, and the panel guide, the lower case and the upper case are assembled to protect the product from mechanical pressure such as shock or vibration from outside and changes of external environment such as high temperature, low temperature and high humidity. (S109-7).

Thereafter, after finishing the remaining module process, the liquid crystal display device is manufactured by inspecting the respective liquid crystal panels (S109-8 and S110).

At this time, before the cover glass is attached, a gap peeling process of applying resin having elasticity and adhesion to both sides of the pad region of the liquid crystal panel is performed in order to prevent damage to the product or damage to the pad part due to an external impact ( S109-6).

6 is a cross-sectional view schematically showing a gap filling dispensing method according to an embodiment of the present invention.

7 is a flowchart sequentially illustrating an example of a gap filling dispensing method according to an embodiment of the present invention.

First, in order to proceed with the gap filling process, the liquid crystal panel 110 is loaded on a predetermined table 122 (S201).

In this case, a dispenser 120 having a nozzle 121 is disposed on the table 122 to apply the resin 129 to the pad area of the liquid crystal panel 110. One side of the table 122 is located. And the opposite side is provided with a sensor 123 and a reflecting plate 124 such as a laser for detecting whether the resin is applied and whether the remaining resin remains.

However, the present invention is not limited thereto, and a sensor and a reflecting plate may be installed on one side and the other side of the table of the cleaning unit for nozzle cleaning to detect whether the resin is applied and whether the remaining resin remains. In addition, a cleaning unit may be installed in the table 122. In this case, the sensor 123 and the reflector 124 for detecting whether resin is applied to one side and the other side of the cleaning unit and remaining resin remain. ) May be installed.

In addition, a sensor and a reflecting plate may be installed on the table of the cleaning unit to detect whether resin is applied and whether residual resin remains.

When the liquid crystal panel 110 is loaded on the table 122, the dispenser 120 moves to the application position to apply the resin 129 (S202 and S203). In this case, the resin 129 is applied to both sides of the pad region, and the resin 129 coated in this way forms the adhesive layer 118 through a curing process.

After the application of the resin 129 is performed, the liquid crystal panel 110 is unloaded and the dispenser 120 is moved to the cleaning unit (S204). In this case, when the cleaning unit is installed in the table 122 as described above, the dispenser 120 is moved to the cleaning unit in the table 122.

Subsequently, in order to prevent the unapplied regeneration of the resin, the sensor 123 and the reflector 124 are detected using the sensor 123 and the reflector 124 in the state of purging before dispensing (S205).

At this time, when the uncoated resin is detected, that is, when the application of the resin is not detected during the purge, the alarm is activated to shut down the equipment, while the uncoated resin is caused by the clogging of the nozzle 121, the dispenser After cleaning the nozzle 121 of 120, the dispensing operation is performed again (S206).

If there is no unapplied detection step, even if unapplied resin occurs due to clogging of the nozzle 121 or the mono pump, the defect will continue to occur until the inspector recognizes the unapplied. For example, the mono-pump may be clogged because the sealing rubber pad of the bubble pump screw portion of the mono pump is cleaved, and when the assembly is performed with excessive force when assembling the bubble pump screw of the mono pump, the sealing rubber pad is deformed and rotated. Splitting may be caused by screws.

However, by adding the step of detecting whether or not the resin is uncoated during the gap filling process, the present invention can detect the unapplied, thereby preventing the continuous occurrence of defects.

For example, the unapplied defects were about 1.2% of the total defects, but when the step of detecting whether or not the resin was added as in the present invention, the defect rate was reduced to about 0.013%, indicating that about 1.187% was improved. have.

On the other hand, the cleaning method of the nozzle may be a method of removing the resin agglomeration by removing the air from both sides of the cleaning device, in this case, if the balance of both air is not matched or the cleaning device is not aligned with the cleaning device is not cleaned Rather, the backflow of air may cause the resin to scatter and stick to the nozzle. Such agglomeration of resin causes over-application when the resin is applied to the nozzle.

Accordingly, in the case of the present invention, by installing the cleaning device on the nozzle to inject air vertically, the above-mentioned resin agglomeration is effectively prevented, which will be described in detail with reference to the accompanying drawings.

8 is a cross-sectional view schematically showing the structure of a gap filling dispenser according to an embodiment of the present invention.

And, Figure 9 is a view showing the lower structure of the cleaning device in the gap filling dispenser according to an embodiment of the present invention shown in FIG.

Referring to the drawings, the gap filling dispenser 120 according to an embodiment of the present invention is installed on the top of the nozzle 121 to apply the resin 129 cleaning device 125 that can be injected with air It features.

The cleaning device 125 may have a circular shape surrounding the nozzle 121, and air passages 126 disposed on both sides of the cleaning device 125 to inject air may be connected to the outside to form the nozzle ( The air supplied through the air passage 126 in a form surrounding the periphery of 121 may be configured to descend the air on the wall surface of the nozzle 121. For example, when the cross section of the nozzle 121 is an elongated rectangular shape, the air passage 126 surrounds the periphery of the nozzle 121 in a rectangular shape.
At this time, as shown in the figure, the wall surface of the nozzle 121 is formed to be inclined toward the end of the nozzle 121, that is, the dispensing unit side of the nozzle 121, the resin is dispensed from the outer surface of the cleaning device 125, Air supplied on the wall surface of the nozzle 121 is applied at an angle to the dispensing part side of the nozzle 121 from the outside.

In this case, contamination of the nozzle 121 due to the aforementioned backflow phenomenon does not occur, and the cleaning time may be improved to 1 to 2 minutes from the existing 10 to 15 minutes.

At this time, the cleaning device 125 may be provided with a control device for setting the pressure and the cleaning time of the air.

The residual resin 129 removed through the air is discharged to the outside through a drain provided at the bottom of the bath 127.

Hereinafter, another example of the gap filling dispensing method using the above cleaning method will be described in detail.

10 is a flowchart sequentially illustrating another example of a gap filling dispensing method according to an embodiment of the present invention. However, the present invention is not limited thereto, and various examples of the gap filling dispensing method may exist.

First, in order to proceed with the gap filling process, a liquid crystal panel is loaded on a predetermined table (S301).

In this case, as described above, a dispenser having a nozzle may be disposed on the upper portion of the table to apply the resin to the pad area of the liquid crystal panel. For example, one side and the other side of the table may be coated with resin or remainder. Sensors such as lasers and reflectors can be installed to detect whether the resin remains.

However, the present invention is not limited thereto, and as another example, a sensor and a reflecting plate may be installed to detect whether the resin is applied to one side and the other side of the table of the cleaning unit for nozzle cleaning and whether the remaining resin remains. . In addition, the cleaning unit may be installed in the table. In this case, the sensor and the reflecting plate may be installed to detect whether the resin is applied to one side and the other side of the cleaning unit and whether the remaining resin remains.

Thereafter, in the state where the dispenser is located in the cleaning unit, the sensor detects whether there is residual resin, and when the residual resin is detected, the nozzle is cleaned using the above-described cleaning apparatus (S301-1).

In addition, when the residual resin is not detected, preliminary application of the resin is performed in the cleaning unit (S302).

At this time, it is detected at the same time whether the resin is unapplied through the sensor, when the unapplied resin is detected, an alarm is activated to shut down the system, and after determining the cause of the unapplied resin, the system is normalized ( S302-1, S302-2). For example, when the uncoated resin is blocked due to the nozzle clogging, the dispensing operation is performed again after cleaning the nozzle 121 of the dispenser 120 (S206).

After the preliminary application of the resin or normalizing the system, the nozzle is cleaned using the above-described cleaning device (S303). That is, the residual resin remaining in the nozzle is removed by vertically injecting air using a cleaning device installed on the nozzle.

Next, the dispenser is moved to the application position of the table to apply the resin (S304, S305). In this case, the resin is applied to both sides of the pad region, and the resin thus applied forms a pressure-sensitive adhesive layer through a curing process.

After the resin is applied, the liquid crystal panel is unloaded, and a new liquid crystal panel is loaded on the table to perform the dispensing operation again (S306).

In this case, the preliminary coating and nozzle cleaning may be performed before loading of the new liquid crystal panel.

Many details are set forth in the foregoing description but should be construed as illustrative of preferred embodiments rather than to limit the scope of the invention. Therefore, the invention should not be defined by the described embodiments, but should be defined by the claims and their equivalents.

101: color filter substrate 102: array substrate
110: liquid crystal panel 111: cover glass
115: pad portion 118: adhesive layer
120: dispenser 121: nozzle
122: table 123: sensor
124: reflector 125: cleaning device
126: air passage 129: resin

Claims (15)

In the dispenser for applying a resin to the edge of the pad region of the array substrate to form an adhesive layer for bonding to the cover glass of the touch panel,
The dispenser,
A nozzle including a dispensing unit through which resin is dispensed; And
A plurality of air input units installed on the nozzles and provided on at least both sides to input air, and air passages extending from the plurality of air input units to surround the nozzles and injecting air toward the nozzles; It consists of a cleaning device,
The air passage extends from the air input portion to the periphery of the nozzle and the side wall of the nozzle is formed to be inclined to the dispensing portion of the nozzle, and the air supplied through the air input portion passes through the air passage as it is along the inclined side wall. Dispenser characterized in that the inclined supply to the dispensing unit side of the nozzle from the outside. The dispenser of claim 1, wherein the cleaning device has a circular shape surrounding the nozzle. delete The dispenser of claim 1, wherein when the cross section of the nozzle has a rectangular shape, the air passage surrounds the periphery of the nozzle in a rectangular shape. The dispenser of claim 1, wherein the cleaning device further comprises a control device that can set air pressure and a cleaning time. Loading a liquid crystal panel on a table;
A resin including a dispensing portion for dispensing, a sidewall of which is inclined to the dispensing portion, a plurality of air input portions provided on at least two sides to extend air, and extending from the plurality of air input portions to surround the nozzle Detecting whether there is a residual resin through a sensor in a state where a dispenser including a cleaning device, the cleaning device including an air passage configured to spray air toward the nozzle, is located in the cleaning unit;
Proceeding with preliminary application of the resin in the cleaning unit, and simultaneously detecting whether or not the resin is uncoated through the sensor;
Supplying air from the cleaning device to clean the nozzle; And
Moving the dispenser to an application position of the table, and applying resin to corners of the panel region of the liquid crystal panel;
The air passage extends from the air input portion to the periphery of the nozzle so that the air supplied through the air input portion is inclinedly supplied to the dispensing portion of the nozzle from the outside along the inclined sidewall as it is through the air passage. Gap Filling Dispensing Method. 7. The method of claim 6, wherein if a residual resin is detected, the nozzle of the dispenser is cleaned using a cleaning device. 7. The method of claim 6, wherein when the unapplied resin is detected, the system is shut down and the system is normalized after determining the cause of the unapplied resin. Providing a liquid crystal panel to which the color filter substrate and the array substrate are bonded to output an image;
Loading the liquid crystal panel on a table;
A resin including a dispensing portion for dispensing, a sidewall of which is inclined to the dispensing portion, a plurality of air input portions provided on at least two sides to extend air, and extending from the plurality of air input portions to surround the nozzle Detecting whether there is a residual resin through a sensor in a state where a dispenser including a cleaning device, the cleaning device including an air passage configured to spray air toward the nozzle, is located in the cleaning unit;
Proceeding with preliminary application of the resin in the cleaning unit, and simultaneously detecting whether or not the resin is uncoated through the sensor;
Cleaning the nozzle by supplying air along the sidewall of the nozzle from the cleaning device;
Moving the dispenser to an application position of the table and applying a resin to a corner of the panel region of the array substrate; And
Curing the applied resin to form an adhesive layer, and attaching the cover glass of the touch panel to the liquid crystal panel,
The air passage extends from the air input portion to the periphery of the nozzle so that the air supplied through the air input portion is inclinedly supplied to the dispensing portion of the nozzle from the outside along the inclined sidewall as it is through the air passage. Method of manufacturing a liquid crystal display device. The method of claim 9, wherein when the remaining resin is detected, the nozzle of the dispenser is cleaned using a cleaning device. The manufacturing method of a liquid crystal display device according to claim 9, wherein when the unapplied resin is detected, the system is normalized and the system is normalized after determining the cause of the unapplied resin. 10. The method of claim 9, wherein a reflector is provided on the opposite side of the sensor to detect whether resin is applied through the sensor and the reflector and whether residual resin remains. delete delete The dispenser of claim 1, wherein the air supplied along the inclined sidewall of the nozzle removes the resin in the central area of the dispensing part of the nozzle.

KR1020120143039A 2012-12-10 2012-12-10 Dispenser capable of preventing pollution of nozzle, and dispensing methode for gap filling using thereof and fabricating method of liquid crystal display device KR102037055B1 (en)

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