KR100548779B1 - An apparatus for dispensing liquid crystal in substrate having panels of various standard and method of fanricating liquid crystal panel using thereof - Google Patents

An apparatus for dispensing liquid crystal in substrate having panels of various standard and method of fanricating liquid crystal panel using thereof Download PDF

Info

Publication number
KR100548779B1
KR100548779B1 KR1020020015738A KR20020015738A KR100548779B1 KR 100548779 B1 KR100548779 B1 KR 100548779B1 KR 1020020015738 A KR1020020015738 A KR 1020020015738A KR 20020015738 A KR20020015738 A KR 20020015738A KR 100548779 B1 KR100548779 B1 KR 100548779B1
Authority
KR
South Korea
Prior art keywords
liquid crystal
panel
substrate
dropping
formed
Prior art date
Application number
KR1020020015738A
Other languages
Korean (ko)
Other versions
KR20030076080A (en
Inventor
김완수
Original Assignee
엘지.필립스 엘시디 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘지.필립스 엘시디 주식회사 filed Critical 엘지.필립스 엘시디 주식회사
Priority to KR1020020015738A priority Critical patent/KR100548779B1/en
Publication of KR20030076080A publication Critical patent/KR20030076080A/en
Application granted granted Critical
Publication of KR100548779B1 publication Critical patent/KR100548779B1/en

Links

Images

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/1303Apparatus specially adapted to the manufacture of LCDs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3033Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
    • B05B1/304Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve
    • B05B1/3046Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05CAPPARATUS FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02Apparatus 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
    • B05C5/0225Apparatus 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 characterised by flow controlling means, e.g. valves, located proximate the outlet
    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362Active matrix addressed cells
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00Control of flow
    • G05D7/01Control of flow without auxiliary power

Abstract

The liquid crystal dropping apparatus of the present invention is for dropping a liquid crystal onto a substrate on which a plurality of liquid crystal panels of various specifications are formed in order to manufacture a small quantity of liquid crystal panels. The liquid crystal is filled and gas is supplied to the liquid crystal panel through a nozzle. The liquid crystal is dropped onto the substrate on which a plurality of liquid crystal panels having various specifications are formed, and the needle is moved up and down by the magnetic force of the solenoid coil and the tension of the spring, and the discharge hole connected to the nozzle is opened and closed to control the amount of liquid crystal dropping. In the dropping apparatus, an optimum liquid crystal dropping amount corresponding to liquid crystal panels of various standards formed on a substrate is calculated and dropped.
Liquid crystal dropping, liquid crystal panel, substrate, specification, loading amount

Description

Liquid crystal dropping apparatus for dropping liquid crystal on a substrate on which panels of various standards are formed, and a method of manufacturing a liquid crystal panel using the same.

1 is a cross-sectional view of a general liquid crystal display device.

2 is a flowchart showing a conventional method for manufacturing a liquid crystal display device.

3 is a view showing liquid crystal injection of a conventional liquid crystal display device.

4 is a view showing a liquid crystal display device manufactured by the liquid crystal dropping method according to the present invention.

5 is a flowchart illustrating a method of manufacturing a liquid crystal display device by the liquid crystal dropping method.

6 is a view showing a basic concept of the liquid crystal dropping method.

Figure 7 is a view showing the structure of the liquid crystal dropping apparatus according to the present invention, Figure 7 (a) is a view of the liquid crystal dropping and Figure 7 (b) is a view of the liquid crystal dropping.

FIG. 8 is a block diagram illustrating a structure of a control unit of FIG. 7.

9 is a flow chart showing a liquid crystal dropping method according to the present invention.

10 is a view showing a substrate in which a plurality of liquid crystal panels of various standards are formed.

Explanation of symbols on the main parts of the drawings

101: liquid crystal panel 103, 105: substrate

107: liquid crystal 120: liquid crystal dropping device

122: case 124: liquid crystal container

128: spring 130: solenoid coil

132: magnetic rod 134: gap adjustment unit

136: Needle 143: Needle Sheet

146: outlet 150: power supply

152: gas supply unit 154: flow control valve

160: control unit 162: panel information input unit

164: panel identification unit 166: load calculation unit

168: power control unit 169: flow control unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal dropping device, and in particular, a liquid crystal dropping device capable of manufacturing liquid crystal display devices having various standards on a single substrate by dropping liquid crystals onto liquid crystal panels having different specifications on a large area substrate and a liquid crystal panel using the same. It is about a method.

Recently, with the development of various portable electronic devices such as mobile phones, PDAs, and notebook computers, there is a growing demand for flat panel display devices for light and thin applications. Such flat panel displays are being actively researched, such as LCD (Liquid Crystal Display), PDP (Plasma Display Panel), FED (Field Emission Display), VFD (Vacuum Fluorescent Display), but mass production technology, ease of driving means, Liquid crystal display devices (LCDs) are in the spotlight for reasons of implementation.

LCD is a device for displaying information on the screen using the refractive anisotropy of the liquid crystal. As shown in FIG. 1, the LCD 1 is composed of a lower substrate 5 and an upper substrate 3 and a liquid crystal layer 7 formed between the lower substrate 5 and the upper substrate 3. The lower substrate 5 is a drive element array substrate. Although not shown in the figure, a plurality of pixels are formed on the lower substrate 5, and a driving element such as a thin film transistor (hereinafter referred to as TFT) is formed in each pixel. The upper substrate 3 is a color filter substrate, and a color filter layer for real color is formed. In addition, a pixel electrode and a common electrode are formed on the lower substrate 5 and the upper substrate 3, respectively, and an alignment film for aligning liquid crystal molecules of the liquid crystal layer 7 is coated.

The lower substrate 5 and the upper substrate 3 are bonded by a sealing material 9, and a liquid crystal layer 7 is formed therebetween by a driving element formed on the lower substrate 5. Information is displayed by controlling the amount of light passing through the liquid crystal layer by driving the liquid crystal molecules.

The manufacturing process of the liquid crystal display device can be largely divided into a driving element array substrate process of forming a driving element on the lower substrate 5, a color filter substrate process of forming a color filter on the upper substrate 3, and a cell process. However, the manufacturing process of such a liquid crystal panel will be described with reference to FIG. 2.

First, a plurality of gate lines and data lines arranged on the lower substrate 5 to define a pixel region are formed by a driving element array process, and the gate line and the data are formed in each of the pixel regions. A thin film transistor which is a driving element connected to the line is formed (S101). In addition, the pixel electrode is connected to the thin film transistor through the driving element array process to drive the liquid crystal layer as a signal is applied through the thin film transistor.

In addition, the upper substrate 3 is formed with a color filter layer and a common electrode of R, G, B to implement the color by the color filter process (S104).

Subsequently, an alignment layer is applied to the upper substrate 3 and the lower substrate 5, respectively, and then the alignment control force or surface fixing force (ie, the liquid crystal molecules of the liquid crystal layer formed between the upper substrate 3 and the lower substrate 5). In order to provide a pretilt angle and an orientation direction, the alignment layer is rubbed (S102 and S105). Subsequently, a spacer is disposed on the lower substrate 5 to maintain a constant cell gap, and a sealing material 9 is applied to an outer portion of the upper substrate 3, and then the lower substrate 5 is disposed. And the upper substrate 3 by applying pressure (S103, S106, S107).

On the other hand, the lower substrate 5 and the upper substrate 3 is made of a large area glass substrate. In other words, a plurality of panel regions are formed on a large area glass substrate, and a TFT and a color filter layer, which are driving elements, are formed in each of the panel regions. Must be processed (S108). Thereafter, the liquid crystal is injected into the liquid crystal panel processed as described above through the liquid crystal inlet, and the liquid crystal inlet is encapsulated to form a liquid crystal layer. Then, the liquid crystal display is manufactured by inspecting each liquid crystal panel (S109 and S110). .

The liquid crystal is injected through the liquid crystal inlet formed in the panel. At this time, the injection of the liquid crystal is made by the pressure difference. 3 shows an apparatus for injecting liquid crystal into the liquid crystal panel. As shown in FIG. 3, a container 12 filled with liquid crystal is provided in a vacuum chamber 10, and a liquid crystal panel 1 is positioned on an upper portion thereof. The vacuum chamber 10 is connected to a vacuum pump to maintain a set vacuum state. In addition, although not shown in the drawing, an apparatus for moving the liquid crystal panel is installed in the vacuum chamber 10 to move the liquid crystal panel 1 from the upper part of the container 12 to the container. 16) is brought into contact with the liquid crystal 14 (this method is referred to as a liquid crystal dipping injection method).

As described above, when nitrogen (N 2 ) gas is supplied into the vacuum chamber 10 while the injection port 16 of the liquid crystal panel 1 is in contact with the liquid crystal 14, the vacuum degree of the chamber 10 is reduced. The liquid crystal 14 is injected into the panel 1 through the injection hole 16 by the pressure difference between the pressure inside the liquid crystal panel 1 and the vacuum chamber 10 and the liquid crystal is completely filled in the panel 1. The liquid crystal layer is formed by sealing the injection hole 16 with a sealing material (this method is called vacuum injection of liquid crystal).

However, the method of forming the liquid crystal layer by injecting liquid crystal through the injection hole 16 of the liquid crystal panel 1 in the vacuum chamber 10 as described above has the following problems.

First, the liquid crystal injection time to the panel 1 is long. In general, the distance between the driving element array substrate and the color filter substrate of the liquid crystal panel is very narrow, such as several μm, so that only a very small amount of liquid crystal is injected into the liquid crystal panel per unit time. For example, when manufacturing a liquid crystal panel of about 15 inches takes about 8 hours to completely inject the liquid crystal, the liquid crystal panel manufacturing process is lengthened by the long-term liquid crystal injection, the manufacturing efficiency is lowered.

Second, the liquid crystal consumption rate is high in the liquid crystal injection method as described above. Of the liquid crystals 14 filled in the container 12, the amount injected into the liquid crystal panel 1 is a very small amount. On the other hand, the liquid crystal reacts with the gas when exposed to the atmosphere or a specific gas, and is degraded by impurities introduced upon contact with the liquid crystal panel 1. Therefore, even when the liquid crystal 14 filled in the container 12 is injected into the plurality of liquid crystal panels 1, the liquid crystal 14 remaining after the injection must be discarded. This leads to an increase in manufacturing cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and an object thereof is to provide a liquid crystal dropping apparatus and a method for dropping liquid crystal directly onto a large area substrate including at least one liquid crystal panel.

Another object of the present invention is to provide a liquid crystal dropping apparatus and a method which can produce a liquid crystal panel having a large number of specifications on one substrate by dropping an optimal liquid crystal on each panel of a substrate having a plurality of liquid crystal panels of various standards.

Still another object of the present invention is to provide a method of manufacturing a liquid crystal panel using the apparatus.

In order to achieve the above object, the liquid crystal dropping apparatus according to the present invention is a liquid crystal is filled with a liquid crystal is dropped onto a substrate on which a plurality of liquid crystal panels having various specifications are formed through a nozzle by the pressure of the gas is supplied, The liquid crystal dropping means adjusts the amount of liquid crystal dropping by opening and closing the discharge hole connected to the nozzle by moving the needle up and down by the magnetic force of the solenoid coil and the tension of the spring installed therein, a power supply unit for supplying power to the solenoid coil, A liquid crystal calculated on each liquid crystal panel formed on the substrate by calculating a dropping amount of a gas supply unit supplying gas to the dropping means and a liquid crystal corresponding to each of the plurality of liquid crystal panels formed on the substrate, and controlling the power supply unit and the gas supply unit; It is composed of a control unit for dropping.

The control unit includes a panel checking unit which checks the liquid crystal panel to be loaded based on the input panel information, a dropping amount calculating unit which calculates a drop amount of the liquid crystal to be loaded onto the liquid crystal panel based on the input panel information, and a power supply. And a power control unit for dropping the calculated drop amount of liquid crystal onto the panel by controlling the unit, and a flow rate control unit dropping the calculated drop amount of liquid crystal onto the corresponding panel by controlling a gas supply unit. The position of the panel to be formed, the area of the panel and the cell gap of the panel.

In addition, the liquid crystal dropping method according to the present invention comprises the steps of preparing a substrate formed with a plurality of liquid crystal panels of various standards, identifying a liquid crystal panel to be dropped, and the liquid crystal drop amount of the liquid crystal panel based on the information of the panel And calculating the dropping amount of the liquid crystal of the drop amount calculated on the liquid crystal panel. When the dropping of one panel is finished, the above process is repeated with respect to the other panel to perform dropping of the liquid crystal on the liquid crystal panels of various standards formed on the substrate.

In addition, the liquid crystal panel manufacturing method according to the present invention comprises the steps of preparing a first substrate and a second substrate formed with a plurality of liquid crystal panels of various standards, identifying a liquid crystal panel to be dropped among the liquid crystal panel formed on the first substrate, Calculating a liquid crystal drop amount of the liquid crystal panel based on the information of the panel, dropping the liquid crystal of the drop amount calculated on the liquid crystal panel, and bonding the first substrate and the second substrate to each other. do.

In order to overcome the shortcomings of the conventional liquid crystal injection method such as the liquid crystal dipping method or the liquid crystal vacuum injection method, a method proposed in recent years is a liquid crystal layer forming method by the liquid crystal dropping method. The liquid crystal dropping method does not inject the liquid crystal by the pressure difference between the inside and the outside of the panel, but directly drops and dispenses the liquid crystal onto the substrate, and uniformly spreads the liquid crystal dropped by the bonding pressure of the panel. The liquid crystal layer is formed by distribution. Since the liquid crystal dropping method directly drops the liquid crystal onto the substrate for a short time, the liquid crystal layer formation of the large area liquid crystal display device can be performed very quickly, and only the required amount of liquid crystal is directly dropped onto the substrate. Since it is possible to minimize the consumption of the liquid crystal display device has the advantage that can significantly reduce the manufacturing cost.

4 is a view showing a basic concept of the liquid crystal dropping method. As shown in the figure, in the liquid crystal dropping method, before the lower substrate 105 and the upper substrate 103 on which the driving element and the color filter are formed, respectively, the liquid crystal 107 is droplet-shaped on the lower substrate 105. Dropping The liquid crystal 107 may be dropped on the substrate 103 on which the color filter is formed. In other words, the substrate to be the liquid crystal dropping method in the liquid crystal dropping method can be either a TFT substrate or a CF substrate. However, when the substrates are bonded, the substrate on which the liquid crystal is dropped must be placed at the bottom.

In this case, a sealing material 109 is applied to the outer region of the upper substrate 103 to apply pressure to the upper substrate 103 and the lower substrate 105 so that the upper substrate 103 and the lower substrate 105 are bonded together. At the same time, droplets of the liquid crystal 107 are spread out by the pressure to form a liquid crystal layer having a uniform thickness between the upper substrate 103 and the lower substrate 105. In other words, the biggest feature of the liquid crystal dropping method is that the liquid crystal 107 is previously dropped on the lower substrate before the panel 101 is bonded, and then the panel is bonded by the sealing material 109.

The liquid crystal display device manufacturing method to which the above liquid crystal dropping method is applied is shown in FIG. 5. As shown in the figure, TFT and color filter layers, which are driving elements, are formed on the lower substrate 105 and the upper substrate 103 through the TFT array process and the color filter process (S201 and S202). The TFT array process and the color filter process are the same as those of the conventional manufacturing method shown in FIG. 2 and are collectively performed on a large-area glass substrate on which a plurality of panel regions are formed. In particular, since the liquid crystal dropping method is applied in the manufacturing method, it can be usefully used in a larger glass substrate, for example, a large area glass substrate having an area of 1000 × 1200 mm 2 or more compared with the conventional manufacturing method.

Subsequently, after the alignment film is applied to the lower substrate 105 on which the TFT is formed and the upper substrate 103 on which the color filter layer is formed, rubbing is performed (S202 and S205), the liquid crystal panel region of the lower substrate 105 is formed. 107 is dropped and a sealing material 109 is applied to the liquid crystal panel outer region of the upper substrate (S203, S206).

Thereafter, pressure is applied while the upper substrate 103 and the lower substrate 105 are aligned, and the upper substrate 105 and the lower substrate 103 are bonded together by a sealing material 109 and at the same time the application of pressure is applied. The liquid crystal 107 dropped by this is spread evenly over the whole panel (S207). Through this process, a plurality of liquid crystal panels having a liquid crystal layer are formed on glass substrates (lower substrates and upper substrates) having a large area. The glass substrates are processed and cut and separated into a plurality of liquid crystal panels. By inspecting, a liquid crystal display device is produced (S208, S209).

Comparing the difference between the method of manufacturing the liquid crystal display device to which the liquid crystal drop method shown in FIG. 5 is applied and the method of manufacturing the liquid crystal display device to which the conventional liquid crystal injection method shown in FIG. 2 is applied, the difference between the vacuum injection and the liquid crystal drop of the liquid crystal and In addition to the difference in the processing time of the large-area glass substrate it can be seen that there are other differences. That is, in the method of manufacturing a liquid crystal display device to which the liquid crystal injection method shown in FIG. 2 is applied, the injection hole must be sealed by an encapsulant after the liquid crystal is injected through the injection hole. This eliminates the need for sealing of these inlets. In addition, although not shown in FIG. 2, in the manufacturing method to which the liquid crystal injection method is applied, since the substrate contacts the liquid crystal when the liquid crystal is injected, the outer surface of the panel is contaminated by the liquid crystal. In the manufacturing method in which the liquid crystal dropping method is applied, since the liquid crystal is directly dropped on the substrate, the panel is not contaminated by the liquid crystal, and as a result, the cleaning process is unnecessary. As described above, the manufacturing method of the liquid crystal display device by the liquid crystal dropping method is made of a simple process by the manufacturing method by the liquid crystal injection method, so that not only the manufacturing efficiency can be improved but also the yield can be improved.

In the manufacturing method of the liquid crystal display device in which the liquid crystal dropping method is introduced as described above, the most important factors for accurately forming the liquid crystal layer to a desired thickness are the position of the liquid crystal to be dropped and the amount of liquid crystal dropping. In particular, since the thickness of the liquid crystal layer has a close relationship with the cell gap of the liquid crystal panel, the accurate dropping position and the dropping amount of the liquid crystal are very important factors for preventing defects of the liquid crystal panel. Therefore, there is a need for a device for dropping the correct amount of liquid crystal at the correct position, the present invention provides such a liquid crystal dropping device.

6 is a view showing the basic concept of dropping the liquid crystal 107 on the substrate (large area glass substrate) 105 using the liquid crystal dropping apparatus 120 according to the present invention. As shown in the figure, the liquid crystal dropping device 120 is provided above the substrate 105. Although not shown in the drawing, the liquid crystal is filled in the liquid crystal dropping device 120 to fill a predetermined amount on the substrate.

Typically, the liquid crystal is dropped onto the substrate in the form of droplets. Since the substrate 105 moves at a set speed in the x and y directions, and the liquid crystal dropping device discharges the liquid crystal at a set time interval, the liquid crystal 107 dropped on the substrate 105 at regular intervals in the x and y directions. Is placed. Of course, the liquid crystal dropping substrate 105 may be fixed and the liquid crystal dropping apparatus 120 may move in the x and y directions to drop the liquid crystal at a predetermined interval. However, in this case, since the droplet-shaped liquid crystals are shaken by the movement of the liquid crystal dropping device 120, an error may occur in the dropping position and the dropping amount of the liquid crystal. Therefore, the liquid crystal dropping device 120 is fixed and the substrate 105 is moved. It is desirable to.

7 is a view showing a liquid crystal dropping apparatus according to the present invention, Figure 7 (a) is a cross-sectional view of the liquid crystal dropping and Figure 7 (b) is a cross-sectional view of the liquid crystal dropping.

As shown in the figure, in the liquid crystal dropping device 120, a cylindrical liquid crystal container 124 is accommodated in the case 122. The liquid crystal container 124 is made of polyethylene and the liquid crystal 107 is filled therein, and the case 122 is made of stainless steel so that the liquid crystal container 124 is formed therein. It is stored. In general, polyethylene is mainly used as the liquid crystal container 124 because it is easy to form a container having a desired shape because of its excellent moldability and does not react with the liquid crystal when the liquid crystal 107 is filled. However, since the polyethylene is weak in strength, it is easy to be deformed by a weak external shock. In particular, when polyethylene is used as the liquid crystal container 124, the container 124 may be deformed to drop the liquid crystal 107 in the correct position. Since it is not present, the case 122 is made of stainless steel having high strength. The gas supply pipe 153 connected to the external gas supply unit 152 is formed on the upper portion of the liquid crystal container 124. Gas such as nitrogen is supplied from the external gas supply unit 152 through the gas supply pipe 153 to apply pressure to the liquid crystal so that the liquid crystal is dropped by filling the gas into a region where the liquid crystal is not filled in the liquid crystal container 124. .

The liquid crystal container 124 may be formed of a metal such as stainless steel. In this case, since the liquid crystal container 124 is not deformed by an external impact, the outer case 122 is not necessary. Therefore, the manufacturing cost of the liquid crystal dropping device 120 can be reduced. As such, when the liquid crystal container 124 is formed of metal, it is preferable to apply a fluorine resin film therein to prevent the filled liquid crystal 107 from causing a chemical reaction with the metal.

An opening (not shown) is formed at the lower end of the case 122. When the liquid crystal container 124 is accommodated in the case 122, a protrusion (not shown) formed at a lower end of the liquid crystal container 124 is inserted into the opening to couple the liquid crystal container 124 to the case 122. Be sure to In addition, the protrusion is coupled to the first coupling portion 141. Although not shown in the drawings, a nut is formed on the protrusion and a bolt is formed on one side of the first coupling part 141, so that the protrusion and the first coupling part 141 are fastened by the nut and the bolt.

A nut is formed at the other end of the first coupling part 141, and a bolt is formed at one end of the second coupling part 142 to fasten the first coupling part 141 and the second coupling part 142. . In this case, a needle sheet 143 is positioned between the first coupling part 141 and the second coupling part 142. The needle seat 143 is inserted into the nut of the first coupling part 141 and the first coupling part 141 and the second coupling part 142 when the bolt of the second coupling part 142 is inserted and fastened. Are coupled between. A discharge hole (not shown) is formed in the needle sheet 143 so that the liquid crystal 107 filled in the liquid crystal container 124 is discharged through the discharge hole through the second coupling part 142.

In addition, a nozzle is coupled to the second coupling part 142. The nozzle is for dropping a small amount of the liquid crystal 107 filled in the liquid crystal container 124, the bolt is coupled to the nut of one end of the second coupling portion 142 to couple the nozzle to the second coupling portion 142. It comprises a support portion 147 and a discharge port 146 protruding from the support portion 147 to drop a small amount of liquid crystal on the substrate in a drop shape.

A discharge pipe extending from the discharge hole of the needle sheet 143 is formed in the support part 147, and the discharge pipe is connected to the discharge hole 146. Typically, the outlet 146 of the nozzle has a very small diameter (to adjust the fine liquid crystal dropping amount) and protrudes from the support 147.

The needle 136 is inserted into the liquid crystal container 124 so that one end thereof contacts the needle sheet 143. In particular, since the end of the needle 136 in contact with the needle sheet 143 has a conical shape, the end is inserted into the discharge hole of the needle sheet 143 to block the discharge hole.

In addition, a spring 128 is mounted at the other end of the needle 136 positioned in the upper case 126 of the liquid crystal dropping device 120, and a magnetic rod 132 having a gap adjusting unit 134 attached thereon. ) Is installed. The magnetic rod 132 is made of a ferromagnetic material or a soft magnetic material, the outside of the cylindrical solenoid coil 130 is installed. The solenoid coil 130 is connected to the power supply unit 150 and is supplied with power. As the power is applied, magnetic force is generated in the magnetic rod 132.

The needle 136 and the magnetic rod 132 are provided at regular intervals (x). When power is supplied from the power supply unit 150 to the solenoid coil 130 to generate a magnetic force on the magnetic rod 132, the needle 136 contacts the magnetic rod 132 by the magnetic force. When the supply is stopped, it is restored to its original position by the elasticity of the spring 128 installed at the end of the needle 136. The discharge hole formed in the needle sheet 143 is opened or closed by the vertical movement of the needle 136. The end of the needle 136 and the needle seat 143 is repeatedly contacted as power is supplied to the solenoid coil 130 and stopped. Due to such repeated contact, the end of the needle 136 and the needle seat 143 are exposed to a constant impact, so there is a possibility of breakage. Therefore, it is preferable that the end of the needle 136 and the needle sheet 143 is formed of a material resistant to impact, for example, cemented carbide, to prevent breakage due to impact.

As shown in FIG. 7 (b), as the discharge hole of the needle sheet 143 is opened, the gas (ie, nitrogen gas) supplied to the liquid crystal container 124 pressurizes the liquid crystal so that the liquid crystal 107 is released from the nozzle. It begins to be loaded. At this time, the amount of the liquid crystal 107 is dropped depends on the time that the discharge hole is opened and the pressure applied to the liquid crystal, the open time is the interval (x) of the needle 136 and the magnetic rod 132, the solenoid coil It is determined by the magnetic force of the magnetic rod 132 generated by the 130 and the tension of the spring 128 provided on the needle 136. The magnetic force of the magnetic rod 132 may be adjusted according to the number of windings of the solenoid coil 130 installed around the magnetic rod 132 or the size of the power applied to the solenoid coil 130, and the needle 136 and the magnetic rod ( The interval x of the 132 can be adjusted by the gap adjusting unit 134 provided at the end of the magnetic rod 132.

The flow rate control valve 154 is provided in the gas supply pipe 153 for supplying gas from the gas supply unit 152 to the liquid crystal container 124. The flow control valve 154 supplies gas into the liquid crystal container 124 according to a control signal applied from the controller 160 to apply a pressure set to the liquid crystal 107 of the liquid crystal container 124.

In addition, the power supply unit 150 is connected to the solenoid coil 130, and the power set to the solenoid coil 130 is supplied according to a control signal of the controller 150.

The controller 160 calculates a drop amount to be loaded on the liquid crystal panel, outputs a control signal to the power supply unit 150 to supply the set power to the solenoid coil 130, and then to the liquid crystal container 124. The flow rate control valve 154 is controlled to apply a pressure set to the liquid crystal 107 to supply gas into the liquid crystal container 124.

The liquid crystal dropping apparatus of the present invention configured as described above can drop liquid crystals on panels of various standards. In particular, by calculating the dropping amount of the liquid crystal to be dropped on each liquid crystal panel on a substrate on which a plurality of liquid crystal panels of various standards are formed, it is possible to drop a small amount of production of a large variety of liquid crystal display elements. Calculation of the drop amount for each panel and dropping of the liquid crystal are performed by the control unit 160.

As shown in FIG. 8, the controller 160 inputs the panel information input unit 162 through which panel information such as the area and the cell gap of the panel formed on the substrate is input, and the characteristic information of the liquid crystal such as the type or viscosity of the liquid crystal. A liquid crystal information input unit 163, a panel checking unit 164 for identifying a liquid crystal panel to which current liquid crystals are dropped from among liquid crystal panels included on a substrate, and identifying an area of the liquid crystal panel and a set cell gap; The solenoid coil 130 controls the dripping amount calculation unit 166 for calculating the dripping amount of the liquid crystal to be dropped on the panel based on the area and the cell gap of the liquid crystal panel and the power supply unit 150 according to the calculated dripping amount. A power control unit 168 for supplying power to the flow control unit, and a flow control unit 169 driving the flow control valve 154 according to the calculated dropping amount to supply the gas of the gas supply unit 152 to the liquid crystal container 124. It is composed.

The panel identification unit 164 checks the positions, areas, and cell gaps of the plurality of liquid crystal panels formed on the substrate, and based on the identified information, the drop amount calculation unit 166 is loaded on each of the plurality of liquid crystal panels in the substrate. The liquid crystal of the calculated drop amount is controlled by the power supply control unit 168 and the flow rate control unit 169 to control the power supply unit 150 and the flow rate control valve 154 and drop the liquid crystal onto the corresponding panel.

In general, the amount of liquid crystal dropped onto the substrate is determined by the distance x between the needle 136 and the magnetic rod 132, the tension of the spring 128, the amount of gas supplied to the liquid crystal container 124, and the solenoid coil ( 130, but the distance x between the needle 136 and the magnetic rod 132 and the tension of the spring 128 is fixed by the operator before the liquid crystal dropping, so that the actual liquid crystal dropping Determining the amount is the amount of gas supplied to the liquid crystal container 124 and the amount of power supplied to the solenoid coil 130. The gas supply amount and power supply amount are controlled by the power supply control unit 168 and the flow rate control unit 169, respectively, and the two elements may act simultaneously or only one may be fixed and the other may act to drop the liquid crystal.

As described above, a method of actually dropping a liquid crystal onto a substrate including a liquid crystal panel of various standards in the configured liquid crystal dropping device will be described with reference to FIG. 9.

First, as shown in FIG. 9, when a substrate including a liquid crystal panel having various standards is loaded into the liquid crystal dropping apparatus 120 (S301), the panel checking unit 164 may currently drop a panel among the liquid crystal panels formed on the substrate. Check (S302).

Liquid crystal panels of various standards may be formed on the substrate. As shown in FIG. 10, for example, in the case of a substrate on which nine liquid crystal panels are formed, liquid crystal panels 101 having various areas and cell gaps may be formed. In fact, in the case of forming a liquid crystal panel having a different cell gap on one substrate, if the cell gap is significantly different, a problem occurs when the substrates are bonded. However, liquid crystal display devices of various standards actually manufactured have only large differences in area and a small difference in cell gap. Therefore, it is possible to form a liquid crystal panel of various standards on one substrate.

In addition, in the liquid crystal dropping method, a pattern spacer is mainly used as a spacer. In the manufacturing process of the spacer, an error occurs in the height of the spacer, so that spacers having different heights may be formed in each panel. In this case, since the error of the spacer is very fine, using the liquid crystal dropping device for small quantity production of the multi-type like the present invention will be able to form a liquid crystal layer corresponding to the height (ie, cell gap) of the spacer.

When the liquid crystal panel 101 to be dropped is confirmed, the drop amount calculation unit 166 checks the area and the cell gap of the panel 101 and calculates the drop amount of the liquid crystal to be dropped (S303 and S304). Thereafter, the power control unit 168 and the flow control unit 169 control the power supply unit 150 and the flow control valve 154 to supply the power and gas corresponding to the calculated drop amount to the solenoid coil 130 and the liquid crystal container. Dropping is started by supplying to 124 (S305, S306).

After the dropping of the panel, if there is a liquid crystal panel 101 of which all the liquid crystal panels 101 formed on the substrate 105 have not finished dropping, the above process is repeated. At this time, the dropping amount is performed by recalculating the dropping amount of the liquid crystal based on the panel area and the cell gap of the liquid crystal panel 101 to be dropped and dropping it.

As described above, the present invention provides a liquid crystal dropping device. In particular, the present invention provides a liquid discharge device capable of dropping liquid crystal on a substrate on which a plurality of liquid crystal panels of various standards are formed, and a liquid crystal panel manufacturing method using the device. To this end, in the present invention, the calculated dropping amount of the liquid crystal is calculated for each panel formed on the substrate, and the calculated dropping amount is dropped into each panel. The present invention is not limited to the liquid crystal dropping device having a specific structure. In the above detailed description, although the liquid crystal dropping device having a specific structure is disclosed, the liquid crystal dropping device is merely an example of the present invention, and does not limit the scope of the present invention. The present invention may be applied to any liquid crystal dropping device having a function of dropping an optimum liquid crystal to a liquid crystal panel of various standards, which is the biggest feature of the present invention.

As described above, in the present invention, when the liquid crystal is dropped onto a substrate on which a plurality of liquid crystal panels of various standards are formed, the amount of dropping dropped on each panel is calculated and then the liquid crystal is dropped. Therefore, it is possible to always drop the optimal dropping amount to all the liquid crystal panels formed on the substrate, and it is possible to manufacture a small amount of a large variety of liquid crystal panels.

Claims (14)

  1. The liquid crystal is filled, the gas is supplied, and the liquid crystal is dropped onto the substrate on which a plurality of liquid crystal panels having various specifications are formed through the nozzle under the pressure of the gas.The needle is moved up and down by the tension of the spring and the magnetic force of the solenoid coil. Liquid crystal dropping means for moving the opening and closing the discharge hole connected to the nozzle to adjust the amount of liquid crystal dropping;
    A power supply unit supplying power to the solenoid coil;
    A gas supply unit supplying gas to the liquid crystal dropping means; And
    A liquid crystal dropping device including a control unit for calculating a drop amount of a liquid crystal corresponding to each of a plurality of liquid crystal panels of various standards formed on the substrate, and controlling the power supply unit and the gas supply unit to drop the calculated liquid crystal on each liquid crystal panel formed on the substrate; .
  2. The method of claim 1, wherein the control unit,
    A panel checking unit which checks a liquid crystal panel to be dropped based on the input panel information;
    A drop amount calculation unit calculating a drop amount of the liquid crystal to be loaded on the liquid crystal panel based on the input panel information; And
    And a power control unit for controlling the power supply unit to drop the calculated drop amount of liquid crystal onto the panel.
  3. The method of claim 1, wherein the control unit,
    A panel checking unit which checks the liquid crystal panel to be loaded based on the input panel information;
    A drop amount calculation unit calculating a drop amount of the liquid crystal to be loaded on the liquid crystal panel based on the input panel information; And
    And a flow rate controller for dropping the calculated drop amount of liquid crystal onto the panel by controlling a gas supply unit.
  4. The method of claim 1, wherein the control unit,
    A panel checking unit which checks a liquid crystal panel to be dropped based on the input panel information;
    A drop amount calculation unit calculating a drop amount of the liquid crystal to be loaded on the liquid crystal panel based on the input panel information;
    A power control unit which controls the power supply unit to drop the calculated drop amount of liquid crystal onto a corresponding panel; And
    And a flow rate controller for dropping the calculated drop amount of liquid crystal onto the panel by controlling a gas supply unit.
  5. The liquid crystal dropping apparatus according to any one of claims 2 to 4, wherein the panel information includes a position of a panel formed on a substrate, an area of the panel, and a cell gap of the panel.
  6. delete
  7. Preparing a substrate on which a plurality of liquid crystal panels of various standards are formed;
    Identifying a liquid crystal panel to be dropped;
    Calculating a liquid crystal drop amount of each of the liquid crystal panels having various standards based on the information of the liquid crystal panel; And
    The liquid crystal of the amount of liquid drop calculated in each of the liquid crystal panels of the various standards by using liquid crystal dropping means for filling the liquid crystal and opening and closing the discharge hole connected to the nozzle by moving the needle up and down by the magnetic force of the solenoid coil installed in the upper part and the tension of the spring. Liquid crystal dropping method comprising the step of dropping.
  8. The liquid crystal dropping method according to claim 7, wherein the panel information includes a position of a panel formed on a substrate, an area of the panel, and a cell gap of the panel.
  9. The method of claim 7, wherein
    Identifying another liquid crystal panel formed on the substrate after the dropping is finished;
    Calculating a liquid crystal drop amount of the liquid crystal panel based on information on the panel; And
    And dropping the liquid crystal of the drop amount calculated on the liquid crystal panel.
  10. Preparing a first substrate and a second substrate on which a plurality of liquid crystal panels of various standards are formed;
    Identifying a liquid crystal panel to be dropped among the liquid crystal panels formed on the first substrate;
    Calculating a liquid crystal drop amount of the liquid crystal panel based on information on the panel;
    The liquid crystal is filled and the dropping amount of liquid crystal calculated in the corresponding liquid crystal panel is dropped by using liquid crystal dropping means for opening and closing the discharge hole connected to the nozzle by moving the needle up and down by the magnetic force of the solenoid coil and the spring tension. ; And
    Liquid crystal panel manufacturing method comprising the step of bonding the first substrate and the second substrate.
  11. The method of claim 10, wherein the first substrate is a thin film transistor substrate on which a thin film transistor is formed, and the second substrate is a color filter substrate on which a color filter is formed.
  12. The method of claim 10, wherein the first substrate is a color filter substrate on which a color filter is formed and the second substrate is a thin film transistor substrate on which a thin film transistor is formed.
  13. delete
  14. delete
KR1020020015738A 2002-03-22 2002-03-22 An apparatus for dispensing liquid crystal in substrate having panels of various standard and method of fanricating liquid crystal panel using thereof KR100548779B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020020015738A KR100548779B1 (en) 2002-03-22 2002-03-22 An apparatus for dispensing liquid crystal in substrate having panels of various standard and method of fanricating liquid crystal panel using thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020020015738A KR100548779B1 (en) 2002-03-22 2002-03-22 An apparatus for dispensing liquid crystal in substrate having panels of various standard and method of fanricating liquid crystal panel using thereof

Publications (2)

Publication Number Publication Date
KR20030076080A KR20030076080A (en) 2003-09-26
KR100548779B1 true KR100548779B1 (en) 2006-02-06

Family

ID=32225932

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020020015738A KR100548779B1 (en) 2002-03-22 2002-03-22 An apparatus for dispensing liquid crystal in substrate having panels of various standard and method of fanricating liquid crystal panel using thereof

Country Status (1)

Country Link
KR (1) KR100548779B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100987910B1 (en) * 2003-11-28 2010-10-13 엘지디스플레이 주식회사 An apparatus and method of dispensing liquid crystal
KR100971089B1 (en) * 2005-05-31 2010-07-16 엘지디스플레이 주식회사 Liquid crystal display device and method for manufacturing lcd
KR101158874B1 (en) * 2005-08-17 2012-06-25 엘지디스플레이 주식회사 Method for manufacturing of the liquid crystal display

Also Published As

Publication number Publication date
KR20030076080A (en) 2003-09-26

Similar Documents

Publication Publication Date Title
US9459498B2 (en) Liquid crystal display device having first seal member and second seal member being directly connected to junction portions
US8031321B2 (en) Methods of manufacturing liquid crystal display devices
KR100526931B1 (en) Formation apparatus and method of thin film, manufacturing apparatus and method of liquid crystal device, liquid crystal device, manufacturing apparatus and method of thin film structure, thin film structure, and electronic equipment
JP4224701B2 (en) Dispenser for liquid crystal display panel and method for controlling gap between nozzle and substrate using the same
US6862072B2 (en) Liquid crystal display and method for manufacturing the same
US7505108B2 (en) Liquid crystal material filling method and liquid crystal material filling apparatus
US5568297A (en) Method of making a liquid crystal display device by measuring the liquid crystal layer thickness and adjusting
JP4212930B2 (en) Bonding apparatus for liquid crystal display element and substrate for manufacturing process of liquid crystal display element
JP4283513B2 (en) System for manufacturing liquid crystal display device and method for manufacturing liquid crystal display device using the same
CN100340910C (en) Liquid crystal distributor with function of determing liquid crystal allowance, and its measuring method
US7808600B2 (en) Liquid crystal display (LCD) device for repairing
US7216782B2 (en) Dispenser for discharging liquid material
US7710534B2 (en) System and method for manufacturing liquid crystal display devices
KR100606446B1 (en) Fabrication method of liquid crystal display device
JP4619734B2 (en) Substrate for liquid crystal display device and liquid crystal display device including the same
US20030112404A1 (en) Liquid crystal display device and method of fabricating the same
US9411178B2 (en) Apparatus for etching substrate and fabrication line for fabricating liquid crystal display using the same
US7518702B2 (en) Electrooptical manufacturing apparatus, electrooptical apparatus, and electronic device
KR100488535B1 (en) Apparatus for dispensing Liquid crystal and method for dispensing thereof
US9285614B2 (en) Liquid crystal dispensing system and method of dispensing liquid crystal material using same
KR100694723B1 (en) Method of manufacturing liquid crystal display apparatus and liquid crystal dripping apparatus
US20020080321A1 (en) Liquid crystal display device manufacturing method and liquid crystal display device manufacturing system
KR20040042275A (en) Seal dispenser of liquid crystal display panel and method for detecting broken part of seal pattern using the same
JP4890971B2 (en) Alignment film rubbing system and alignment film rubbing method for liquid crystal display element
JP3678974B2 (en) Manufacturing method of liquid crystal display device

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
AMND Amendment
E601 Decision to refuse application
J201 Request for trial against refusal decision
AMND Amendment
B701 Decision to grant
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20121228

Year of fee payment: 8

FPAY Annual fee payment

Payment date: 20131227

Year of fee payment: 9

FPAY Annual fee payment

Payment date: 20141230

Year of fee payment: 10

FPAY Annual fee payment

Payment date: 20151228

Year of fee payment: 11

FPAY Annual fee payment

Payment date: 20161214

Year of fee payment: 12

FPAY Annual fee payment

Payment date: 20171218

Year of fee payment: 13

FPAY Annual fee payment

Payment date: 20181226

Year of fee payment: 14