KR20140074744A - 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
KR20140074744A
KR20140074744A KR1020120143039A KR20120143039A KR20140074744A KR 20140074744 A KR20140074744 A KR 20140074744A KR 1020120143039 A KR1020120143039 A KR 1020120143039A KR 20120143039 A KR20120143039 A KR 20120143039A KR 20140074744 A KR20140074744 A KR 20140074744A
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nozzle
resin
liquid crystal
dispenser
cleaning
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KR1020120143039A
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Korean (ko)
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KR102037055B1 (en
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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

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Nonlinear Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

Dispenser preventing contamination of nozzle according to the present invention, gap filling dispensing method using same, and method of manufacturing liquid crystal display device in gap filling dispensing for protecting a pad portion and coupling a cover glass of a touch panel with a panel, The present invention relates to a method for effectively preventing nozzle contamination by cleaning a nozzle by vertically injecting air by providing a cleaning device on an upper portion of the nozzle and by preventing nozzle clogging through a sensor during dispensing, The dispenser includes a nozzle for applying the resin; And a cleaning device installed on the nozzle and spraying air vertically toward the nozzle.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a dispenser for preventing contamination of nozzles, a gap filling dispensing method using the dispenser, and a manufacturing method of a liquid crystal display device using the dispenser. 2. Description of the Related Art DISPENSER CAPABLE OF PREVENTING POLLUTION OF NOZZLE AND DISPENSING METHOD 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 in gap filling dispensing for protecting a pad portion, a gap filling dispensing method using the dispenser, and a manufacturing method of a liquid crystal display device.

In recent information society, display device is more emphasized as a visual information delivery medium and it is necessary to meet requirements such as low power consumption, thinning, light weight, and high image quality in order to take a major position in the future.

The display device may include a cathode ray tube (CRT), an electroluminescence (EL), a light emitting diode (LED), a vacuum fluorescent display (VFD) Light emitting devices such as organic light emitting display (OLED), field emission display (FED), plasma display panel (PDP), electrophoresis display, And can be divided into a non-light emitting type, such as a liquid crystal display (LCD), which itself can not emit light.

The liquid crystal display device is a display device which can display a desired image by individually supplying data signals according to image information to pixels arranged in a matrix form and adjusting the light transmittance of the pixels.

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

The liquid crystal panel is composed of a color filter substrate, an array substrate, and a liquid crystal layer formed in a cell gap between the color filter substrate and the array substrate so as to face each other to maintain a uniform cell gap. do.

At this time, a common electrode and a pixel electrode are formed on the liquid crystal panel in which the color filter substrate and the array substrate are bonded together 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 is rotated by dielectric anisotropy according to the electric field between the common electrode and the pixel electrode And a character or an image is 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 drawings.

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

As shown in the figure, a typical liquid crystal display device includes a liquid crystal panel 10 in which pixels are arranged in a matrix form to output an image, drivers 15 and 16 for driving the pixels, And a panel guide 45 for receiving and fixing the liquid crystal panel 10 and the backlight unit.

Although not shown, the liquid crystal panel 10 includes a color filter substrate, an array substrate, and a liquid crystal layer formed in a cell gap between the color filter substrate and the array substrate so as to maintain a uniform cell gap so as to face each other.

A common electrode and a pixel electrode are formed on the liquid crystal panel 10 to which the color filter substrate and the array substrate are attached to each other. An electric field is applied to the liquid crystal layer. Data applied to the pixel electrode When the voltage of the signal is controlled, the liquid crystal of the liquid crystal layer rotates by dielectric anisotropy according to an 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 on a pixel-by-pixel basis, a switching element such as a thin film transistor (TFT) is individually provided in the pixels.

The upper and lower polarizers (not shown) are attached to the outside of the liquid crystal panel 10, respectively, and the lower polarizer polarizes the light transmitted through the backlight unit. The upper polarizer is disposed on the liquid crystal panel 10 Polarized light.

A light emitting diode (LED) assembly 30 for generating light is provided on one side of a light guide plate 42. The backlight unit 30 includes a light guide plate 42, A reflection plate 41 is provided.

The LED assembly 30 includes an LED array 31 and an LED housing 32 to which an LED printed circuit board (PCB) (not shown) for driving the LED array 31 is attached. Lt; / RTI >

The light emitted from the LED array 31 is incident on a side surface of the light guide plate 42 of transparent material and the reflection plate 41 disposed on the back surface of the light guide plate 42 is transmitted to the back 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 the uniformity.

The liquid crystal panel 10 composed of the color filter substrate and the array substrate is mounted on the upper part of the backlight unit thus configured through the panel guide 45. The liquid crystal panel 10, the panel guide 45, and are coupled to each other by a lower case 50 and an upper case 60 through a screw so as to constitute a liquid crystal display device.

In this case, mobile products such as mobile phones are vulnerable to an external impact such as a drop. When such an impact is applied, the impact is concentrated on the edge of the pad region of the array substrate, causing damage to the product or damage to the pad portion.

In other words, as described above, the liquid crystal panel 10 is constructed such that the upper color filter substrate and the lower array substrate are bonded together, and one side of the array substrate is formed to protrude from the color filter substrate. This is because the pad area is formed on one side of the array substrate which is not overlapped with the color filter substrate. The pad region remains as an empty space when the liquid crystal panel 10 is coupled with the cover glass of the touch panel (not shown), so that the impact is concentrated when an external impact is applied.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a gap filling dispensing method for protecting a pad portion from an external impact and a manufacturing method of the liquid crystal display device using the same.

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

Other objects and features of the present invention will be described in the following description of the invention and the claims.

In order to accomplish the above object, the present invention provides a dispenser for preventing contamination of a nozzle, which forms a pressure-sensitive adhesive layer for bonding with a cover glass of a touch panel by applying resin to an edge of a pad area of an array substrate, A nozzle for applying the resin; And a cleaning device installed on the nozzle and spraying air vertically toward the nozzle.

In this case, the cleaning device has a circular shape to surround the nozzle.

The cleaning apparatus further includes an air passage connected from the outside to surround the periphery of the nozzle.

In this case, when the cross section of the nozzle has a rectangular shape, the air passage surrounds the periphery of the nozzle in the form of a rectangle.

The cleaning device further comprises a control device capable of setting the pressure of the air and the cleaning time.

The gap filling dispensing method of the present invention includes: loading a liquid crystal panel on a table; Detecting whether a residual resin is present through the sensor when the dispenser is located in the cleaning section; Performing preliminary application of the resin in the cleaning part and simultaneously detecting whether the resin is not applied 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 resin to an edge of the panel region of the liquid crystal panel.

At this time, when residual resin is detected, the nozzle of the dispenser is cleaned by using a cleaning device.

When the uncoated resin is detected, the system is down, and the system is normalized after the cause of the uncoated resin is determined.

According to another 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 for outputting an image by attaching a color filter substrate and an array substrate; Loading the liquid crystal panel onto a table; Detecting whether a residual resin is present through the sensor when the dispenser is located in the cleaning section; Performing preliminary application of the resin in the cleaning part and simultaneously detecting whether the resin is not applied 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 resin to an edge of the panel region of the array substrate; And curing the applied resin to form an adhesive layer, thereby attaching a cover glass of the touch panel to the upper portion of the liquid crystal panel.

At this time, when residual resin is detected, the nozzle of the dispenser is cleaned by using a cleaning device.

When the uncoated resin is detected, the system is down, and the system is normalized after the cause of the uncoated resin is determined.

And a reflection plate is provided on the opposite side of the sensor to detect whether the resin is applied through the sensor and the reflection plate and whether residual resin remains.

And the nozzle of the dispenser is cleaned using a cleaning device installed on the nozzle.

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

As described above, the dispenser in which the nozzle is not contaminated according to the present invention, the gap filling dispensing method using the same, and the manufacturing method of the liquid crystal display device according to the present invention are characterized in that in the gap filling dispensing, a cleaning device is installed above the nozzle of the dispenser, The nozzles are cleaned by spraying in the vertical direction to effectively prevent contamination of the nozzles, while detecting the clogging of the nozzles through the sensors during dispensing, thereby preventing defective resin coating failure.

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

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a dispenser preventing contamination of nozzles according to the present invention, a gap filling dispensing method using the dispenser, and a method of manufacturing a liquid crystal display device according to the present invention will be described with reference to the accompanying drawings, So that it can be easily carried out.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

FIGS. 2 and 3 are plan views schematically showing a structure of a liquid crystal display device according to an embodiment of the present invention, and a liquid crystal display device is shown as a display device by way of example.

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

Referring to the drawings, a liquid crystal display according to an embodiment of the present invention includes a liquid crystal panel 110 in which pixels are arranged in a matrix form to output an image, a liquid crystal panel 110 installed on a rear surface 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 receiving and fixing the liquid crystal panel 110 and the backlight unit.

The liquid crystal panel 110 includes a color filter substrate 101 and an array substrate 102 bonded to each other such that a uniform cell gap is maintained so as to face the liquid crystal panel 110. The liquid crystal panel 110 includes a liquid crystal panel 110 formed in a cell gap between the color filter substrate 101 and the array substrate 102, Layer (not shown).

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

The array substrate 102 includes a plurality of gate lines and data lines arranged vertically and horizontally to define a plurality of pixel regions, a thin film transistor serving as a switching element formed in a crossing region between the gate lines and the data lines, And a pixel electrode. In this case, in the case of an in-plane switching (IPS) liquid crystal display device, a common electrode is formed on the array substrate 102 instead of the color filter substrate 101.

The upper and lower polarizers (not shown) are attached to the outside of the liquid crystal panel 110, respectively. The lower polarizer polarizes the light passing through the backlight unit, and the upper polarizer is disposed on the liquid crystal panel 110 Polarized light.

Although not shown, the backlight unit will be described in detail. A light emitting diode (LED) array for emitting light is provided on at least one side of the reflection plate, A light guide plate for emitting light generated in the LED array toward the liquid crystal panel 110 is installed in the outgoing direction of the array.

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 a side surface of the light guide plate having a transparent material. The reflection plate disposed on the back surface of the light guide plate reflects light transmitted to the back surface of the light guide plate toward the optical sheets on the upper surface of the light guide plate, And the uniformity is improved.

A liquid crystal panel 110 composed of the color filter substrate 101 and the array substrate 102 is mounted on a top of the backlight unit thus configured through a panel guide (not shown) 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 a screw to constitute a liquid crystal display device.

At this time, a touch panel (not shown) is provided on the liquid crystal panel 110 to input letters and pictures more conveniently and precisely. At this time, a cover glass 111 of the touch panel is adhered Layer 118 to the edge of the liquid crystal panel 110.

As described above, the liquid crystal panel 110 includes a color filter substrate 101 and an array substrate 102 disposed therebelow. The array substrate 102 has a color filter substrate 101 As shown in FIG. This is because the pad region 102a on which the pad portion 115 is formed is located on one side of the array substrate 102 which is not overlapped with the color filter substrate 101. [

An integrated circuit chip (not shown) may be mounted on the pad region 102a of the liquid crystal panel 110 by using a chip on glass method. A protection film (not shown) may be formed around the integrated circuit chip, So as to cover and protect the pad electrodes (not shown) formed in the pad region 102a. Electronic devices (not shown) for processing a driving signal are connected to a chip-on-a-chip (FPCB) 117 on a flexible printed circuit board (FPCB) 117 connected to the pad unit 115 of the liquid crystal panel 110. [ and a connector (not shown) for transmitting an external signal to the flexible circuit board 117 may be provided.

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

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

At this time, in the embodiment of the present invention, the adhesive layer 118 made of resin having an elastic force and an adhesive force is filled in the empty space between both sides of the pad area 102a and the cover glass 111, It is possible to prevent breakage of the product or damage of the pad portion 115 due to the contact portion.

That is, the pad portion 115 of the liquid crystal panel 110 is protected during a direct bonding process of the cover glass 111 and external impact, and at the same time, the gap between the cover glass 111 and the liquid crystal panel 110 A resin having an elastic force and an adhesive force is filled in the void space between both sides of the pad region 102a and the cover glass 111. The filled resin is cured to form a predetermined adhesive layer 118, And the process of forming the adhesive layer 118 is referred to as gap filling in order to fill the void space.

As described above, in the case of a mobile product such as a mobile phone, a predetermined adhesive layer 118 is provided at the edge of the pad region 102a of the array substrate 102 to absorb the external shock even when an external impact such as dropping is applied, Or the pad portion 115 can be prevented from being damaged.

The adhesive layer 118 may be formed by applying a resin with a dispenser and then curing the adhesive layer 118. In the present invention, a cleaning device is installed above the nozzle of the dispenser to spray air vertically, It is possible to effectively prevent contamination of the nozzle while sensing the clogging of the nozzle through the sensor during dispensing, thereby preventing defective coating of the resin in advance. The method of manufacturing the liquid crystal display device according to the embodiment of the present invention, Will be described in detail.

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

5 is a flowchart specifically showing the module process in the method of manufacturing the liquid crystal display device according to the embodiment of the present invention shown in FIG.

4 illustrates a method of manufacturing a liquid crystal display device in the case where a liquid crystal layer is formed by a liquid crystal dropping method. However, the present invention is not limited thereto, and the present invention can be applied to a liquid crystal display The present invention can be applied to a manufacturing method of a liquid crystal display device.

In addition, although a liquid crystal display device is described as an example of a 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 can be largely divided into a driving element array process for forming driving elements on a lower array substrate, a color filter process for forming a color filter on the upper color filter substrate, a cell process and a module process.

At this time, the cell process includes a step of forming an alignment film, a liquid crystal, a sealant, and spacers, and aligning and bonding the array substrate and the color filter substrate to each other in order to inject and adhere liquid crystals using the completed array substrate and the color filter substrate .

In addition, the module process is a process of manufacturing a circuit for signal processing, connecting a liquid crystal panel and a signal processing circuit portion by a mounting technique, and attaching an apparatus to manufacture a module.

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

In addition, the color filter substrate is formed with a color filter layer composed of red, green, and blue sub-color filters that implement color by the color filter process and a common electrode (S102). At this time, when the transverse electric field type liquid crystal display device is manufactured, the common electrode is formed on the array substrate on which the pixel electrode is formed through the array process.

Next, in the cell process, the orientation film is printed on the color filter substrate and the array substrate, respectively, and then the alignment regulating force or the surface fixing force (that is, 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 the alignment direction), the alignment film is rubbed (S103, S104).

A sealing material is applied to the rubbed color filter substrate to form a predetermined seal pattern, and a liquid crystal layer is formed by dropping liquid crystal on the array substrate (S105, S106).

At this time, a plurality of the color filter substrate and the array substrate are divided into a large-sized mother substrate. In other words, a plurality of panel regions are defined in a large-sized mother substrate, and thin film transistors and color filters, which are driving elements, are formed in each of the panel regions.

At this time, the dropping system dispenses liquid crystal to an image display area of a large-area first mother substrate on which a plurality of array substrates are arranged or a second mother substrate on which a plurality of color filter substrates are arranged using a dispenser, And the liquid crystal is uniformly distributed over the entire image display area by the pressure for attaching the first and second mother substrates to each other, thereby forming a liquid crystal layer.

Therefore, when the liquid crystal layer is formed on the second mother substrate through the dropping method, the seal pattern must be formed in a closed pattern surrounding the periphery of the pixel region so as to prevent the liquid crystal from leaking out of the image display region.

The dropping method can drop the liquid crystal in a shorter time than the vacuum injection method, and even when the liquid crystal panel is enlarged, the liquid crystal layer can be formed very quickly. In addition, since only a necessary amount of liquid crystal is dropped onto the substrate, an increase in the price of the liquid crystal panel due to disposal of expensive liquid crystal such as a vacuum injection method is prevented, thereby enhancing the price competitiveness of the product.

Thereafter, the first mother substrate and the second mother substrate are bonded together by applying a pressure in a state in which the first mother substrate and the second mother substrate, to which the liquid crystal is dropped and the sealing material is coated, are aligned, The liquid crystal dropped by application of pressure is uniformly spread over the entire liquid crystal panel (S107).

By this process, a large number of unit liquid crystal panels having liquid crystal layers are formed on the large-area first and second mother substrate, and the first and second mother substrates are processed and cut into a plurality of unit liquid crystal panels (S108).

Next, in the module process, the unit liquid crystal panel and the signal processing circuit portion are connected by a mounting technique, and then a module is attached by attaching an apparatus (S109).

That is, in order to do so, a cleaning process for removing foreign matter existing on the surface of the liquid crystal panel is performed before attaching the polarizer to the upper and lower surfaces of the liquid crystal panel (S109-1).

After the cleaned liquid crystal panel is aligned, the release film of the polarizer is peeled off, and a polarizer is attached to the upper and lower surfaces of the liquid crystal panel (S109-2).

A TAB (Tape Automatic Bonding) is attached to the pad portion of the liquid crystal panel. The TAB has a driving integrated circuit (IC) in itself, (S109-3). The process of punching in the TCP (Tape Carrier Package) state to make it attachable to the liquid crystal panel, and attaching it to the pad portion of the liquid crystal panel using the anisotropic conductive film is referred to as a TAB attaching process.

Then, after a predetermined defoamation is performed, a signal input from the outside is divided into a control signal and a data signal and is sent to the TCP. In order to supply a voltage for driving the liquid crystal panel, (S109-4, S109-5).

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

The panel guide, the lower case, and the upper case are assembled to protect the product from external pressures such as impact or vibration and external environments such as high temperature, low temperature, high humidity and the like by assembling the backlight assembly at the bottom of the liquid crystal panel (S109-7).

After completing the remaining module processes, the respective liquid crystal panels are inspected to manufacture a liquid crystal display device (S109-8, S110).

At this time, in order to prevent breakage of the product or damage of the pad portion due to an external impact before the cover glass is attached, a gap filling process is performed in which a resin having an elastic force and adhesive force is applied to both sides of the pad region of the liquid crystal panel S109-6).

6 is a cross-sectional view schematically illustrating 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, the liquid crystal panel 110 is loaded on a predetermined table 122 to perform the gap filling process (S201).

At this time, a dispenser 120 having a nozzle 121 is disposed on the table 122 to apply a resin 129 to a pad area of the liquid crystal panel 110, And a sensor 123 and a reflection plate 124 such as a laser for detecting whether or not the resin is applied and remaining resin remains.

However, the present invention is not limited thereto, and a sensor and a reflector may be installed to detect whether the resin is applied to one side and the opposite side of the table of the washing unit for cleaning the nozzle, and whether remaining resin remains. In this case, the sensor 123 and the reflection plate 124 for sensing whether the resin is coated on one side and the opposite side of the cleaner, and whether the remaining resin remains, ) May be installed.

Further, a sensor and a reflector may be installed to detect whether the resin is applied to the table of the cleaner and whether any remaining 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, S203). At this time, the resin 129 is applied to both sides of the pad region, and the applied resin 129 is cured to form an adhesive layer 118.

After the application of the resin 129 is completed, the liquid crystal panel 110 is unloaded and the dispenser 120 is moved to the cleaning section (S204). At this time, when the cleaner is installed in the table 122 as described above, the dispenser 120 is moved to the cleaner in the table 122.

Next, in order to prevent the occurrence of resin non-applied material, the sensor 123 and the reflection plate 124 are used to detect whether the resin is not applied (S205) before the dispensing operation is purged.

In this case, when the application of the resin is not detected, that is, when the application of the resin is not detected, an alarm is activated to bring down the facility, and when the application of the resin is due to clogging of the nozzle 121, After the nozzle 121 of the nozzle 120 is cleaned, the dispensing operation is performed again (S206).

In the absence of such an uncoated detection step, even if the resin is not applied due to clogging of the nozzle 121 or mono pump, defects are continuously generated until the inspector recognizes the uncoated coating. For example, when the mono pump is assembled by excessive force when assembling the bubble-removing screw of the mono pump, the sealing rubber pad may be deformed and rotated when the bubble-removing screw of the mono pump is assembled with excessive force. A crack may be generated by a screw.

However, by adding the step of detecting whether the resin is not applied during the gap filling process as in the present invention, even if unapplication occurs, it is possible to detect the unapplication and to prevent the continuous occurrence of defects.

For example, when the step of detecting whether the resin is not applied is added as in the present invention, the defective rate is reduced to about 0.013%, which is about 1.187%, which is about 1.2% of the total defective. have.

Meanwhile, in the cleaning method of the nozzle, a method in which air is discharged from both sides of the cleaning device to remove the resin clusters can be used. However, in this case, if the air is not balanced or the cleaning device and the liner do not match, Rather, the resin may be scattered due to the back flow of air and stick to the nozzle. This aggregation of the resin causes the application of the resin to the nozzle and the overcoating.

Accordingly, in the case of the present invention, a cleaning device is provided on the upper part of the nozzle to vertically inject the air, thereby effectively preventing the above-described resin aggregation, which will be described in detail with reference to the drawings.

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 bottom view of the cleaning apparatus of the gap filling dispenser according to the embodiment of the present invention shown in FIG.

Referring to the drawings, a gap filling dispenser 120 according to an embodiment of the present invention includes a nozzle 121 to which a resin 129 is applied, and a cleaning device 125 to which air can be injected, .

The cleaning device 125 may have a circular shape to enclose the nozzle 121. The air passage 126 through which the air is injected may be connected to the nozzle 121 to surround the nozzle 121, The air can be drawn down through the nozzle 121 through the nozzle 126. For example, when the cross section of the nozzle 121 is an elongated rectangular shape, the air passage 126 surrounds the nozzle 121 in the form of a rectangle.

In this case, contamination of the nozzle 121 by the above-described backflow phenomenon does not occur, and the cleaning time can be improved to 1 to 2 minutes in the conventional 10 to 15 minutes.

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

The residual resin 129 to be removed through the air is discharged to the outside through the 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 the gap filling dispensing method according to the embodiment of the present invention. However, the present invention is not limited thereto, and there may be various examples of the gap filling dispensing method.

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

At this time, as described above, a dispenser having a nozzle for applying resin to a pad region of the liquid crystal panel may be disposed on the upper portion of the table. For example, one side and the opposite side of the table may be coated with resin, A sensor such as a laser and a reflector may be installed to sense whether the resin remains.

However, the present invention is not limited thereto. For example, a sensor and a reflection plate may be installed to detect whether the resin is applied to one side and the opposite side of the table of the washing unit for cleaning the nozzle, and whether residual resin remains. . In addition, the cleaner may be installed in the table. In this case, the sensor and the reflection plate may be installed to detect whether the resin is applied to one side and the opposite side of the cleaner, and whether remaining resin remains.

Thereafter, when the dispenser is located at the cleaner, it is detected whether the residual resin is present through the sensor. If the remaining resin is detected, the nozzle is cleaned using the cleaning device described above (S301-1).

If the remaining resin is not detected, the pre-coating of the resin is performed by the cleaner (S302).

At this time, at the same time, whether or not the resin is applied is detected through the sensor. When the uncoated resin is detected, an alarm is activated to shut down the system, and the system is normalized after determining the cause of unapplication of the resin S302-1, S302-2). For example, if the uncoated resin is caused by clogging of the nozzle, the nozzle 121 of the dispenser 120 may be cleaned before the dispensing operation is performed again (S206).

After pre-application of the resin or normalization of the system, the nozzle is cleaned using the above-described cleaning apparatus (S303). That is, the remaining resin remains in the nozzle by vertically injecting the air using a cleaning device installed on the nozzle.

Then, the dispenser moves to the application position of the table to apply the resin (S304, S305). At this time, the resin is applied to both sides of the pad region, and the resin thus coated is cured to form an adhesive layer.

After the application of the resin is completed, the liquid crystal panel is unloaded, a new liquid crystal panel is loaded on the table, and the dispensing operation is performed again (S306).

At this time, pre-application and nozzle cleaning described above may be performed before loading a new liquid crystal panel.

While a great many are described in the foregoing description, it should be construed as an example of preferred embodiments rather than limiting the scope of the invention. Therefore, the invention should not be construed as limited to the embodiments described, but should be determined by equivalents to the appended claims and the claims.

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 (14)

In a dispenser for forming a pressure-sensitive adhesive layer for bonding with a cover glass of a touch panel by applying resin to an edge of a pad region of an array substrate,
The dispenser
A nozzle for applying the resin; And
And a cleaning device installed on the nozzle for spraying air vertically toward the nozzle. The dispenser of claim 1, wherein the cleaning device has a circular shape that wraps the nozzle. The dispenser of claim 1, wherein the cleaning device further includes an air passage connected to the cleaning device to surround the periphery of the nozzle. 4. The dispenser of claim 3, wherein when the cross-section of the nozzle is a rectangular shape, the air passage surrounds the periphery of the nozzle in the form of a rectangle. 4. The dispenser according to claim 3, wherein the cleaning device further comprises a control device capable of setting the pressure of the air and the cleaning time. Loading a liquid crystal panel onto the table;
Detecting whether a residual resin is present through the sensor when the dispenser is located in the cleaning section;
Performing preliminary application of the resin in the cleaning part and simultaneously detecting whether the resin is not applied through the sensor;
Cleaning the nozzle of the dispenser using a cleaning device; And
And moving the dispenser to an application position of the table and applying resin to an edge of the panel area of the liquid crystal panel. The gap filling dispensing method according to claim 6, wherein when the residual resin is detected, the nozzle of the dispenser is cleaned using a cleaning device. The gap filling dispensing method according to claim 6, wherein when the uncoated resin is detected, the system is shut down and the system is normalized after determining the cause of unapplication of the resin. Providing a liquid crystal panel for outputting an image by attaching a color filter substrate and an array substrate;
Loading the liquid crystal panel onto a table;
Detecting whether a residual resin is present through the sensor when the dispenser is located in the cleaning section;
Performing preliminary application of the resin in the cleaning part and simultaneously detecting whether the resin is not applied 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 resin to an edge of the panel region of the array substrate; And
And curing the applied resin to form an adhesive layer, thereby attaching a cover glass of a touch panel to the upper portion of the liquid crystal panel. The method according to claim 9, wherein when the residual resin is detected, the nozzle of the dispenser is cleaned using a cleaning device. 10. The method of claim 9, wherein when the uncoated resin is detected, the system is shut down and the system is normalized after determining the cause of the uncoated resin. 10. The method of claim 9, wherein a reflection plate is provided on the opposite side of the sensor, and whether or not the resin is applied through the sensor and the reflection plate and remaining resin is detected. The method of manufacturing a liquid crystal display device according to claim 9, wherein the cleaning of the nozzle of the dispenser is performed using a cleaning device installed on the nozzle. 14. The method of claim 13, wherein the cleaning device vertically injects air toward 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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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170003244A (en) * 2015-06-30 2017-01-09 엘지디스플레이 주식회사 Display panel and method for manufacturing the same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0929155A (en) * 1995-07-21 1997-02-04 Tokyo Ohka Kogyo Co Ltd Coating nozzle and coater with same
KR20040057676A (en) * 2002-12-26 2004-07-02 엘지.필립스 엘시디 주식회사 Apparatus for Dotting Adhesive and Dotting Method thereof
KR20090109222A (en) * 2008-04-15 2009-10-20 삼성전기주식회사 Dispenser
KR20110058564A (en) * 2009-11-26 2011-06-01 세메스 주식회사 Head cleaning unit and apparatus of dispensing liquid crystal with the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0929155A (en) * 1995-07-21 1997-02-04 Tokyo Ohka Kogyo Co Ltd Coating nozzle and coater with same
KR20040057676A (en) * 2002-12-26 2004-07-02 엘지.필립스 엘시디 주식회사 Apparatus for Dotting Adhesive and Dotting Method thereof
KR20090109222A (en) * 2008-04-15 2009-10-20 삼성전기주식회사 Dispenser
KR20110058564A (en) * 2009-11-26 2011-06-01 세메스 주식회사 Head cleaning unit and apparatus of dispensing liquid crystal with the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170003244A (en) * 2015-06-30 2017-01-09 엘지디스플레이 주식회사 Display panel and method for manufacturing the same

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