KR20140028605A - Method of fabricating thin liquid crystal display device having touch panel - Google Patents

Abstract

The present invention provides a method for manufacturing a thin liquid crystal display device having a touch panel to manufacture a thin touch panel having improved performance with low costs using an auxiliary substrate to perform processes of treating thin glass substrate when manufacturing a thin touch panel by applying a hybrid in cell structure. The method for manufacturing a thin liquid crystal display device comprises the steps of supplying first and second thin main substrates and first, second and third auxiliary substrates; respectively attaching the first and second auxiliary substrates to the first and second thin main substrates; applying an array process to the first main substrate to which the first auxiliary substrate is attached; forming a first touch electrode in the first main substrate during the array process; forming a second touch electrode in one surface of the second main substrate to which the second auxiliary substrate is attached; attaching a third auxiliary substrate to one surface of the second main substrate having the second touch electrode formed therein and then separating the second auxiliary substrate from the second main substrate; reversing the second main substrate to which the third auxiliary substrate is attached; applying a color filter process to the other surface of the second main substrate; bonding the first main substrate to which the array process is applied and the second main substrate to which the color filter process is applied; and separating the first and third auxiliary substrates from the first and second main substrates. [Reference numerals] (S210) Attach a first auxiliary substrate to a first thin glass substrate; (S220) Attach a second auxiliary substrate to a second thin glass substrate; (S230) Perform a TFT array process (Form a first touch electrode); (S240-1) Form a second touch electrode; (S240-2') Attach a third auxiliary substrate to the second glass substrate; (S240-3') Separate the second auxiliary substrate; (S240-4) Perform a color filter proceess; (S250,S260) Perform an alignment process; (S270) Load a liquid crystal; (S280) Coat a sealing agent; (S290-1) Perform a bonding process; (S290-2) Separate the first and third auxiliary substrates; (S290-3) Process and Inspect

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method of manufacturing a thin liquid crystal display device having a touch panel,

The present invention relates to a method of manufacturing a thin liquid crystal display device, and more particularly, to a method of manufacturing a thin liquid crystal display device having a touch panel.

2. Description of the Related Art Recently, the display field for processing and displaying a large amount of information has been rapidly developed as society has entered into a full-fledged information age. Recently, thin-film transistors (thin A liquid crystal display (LCD) has been developed to replace a conventional cathode ray tube (CRT).

In recent years, a touch panel, which has the advantage of being able to input letters and pictures more conveniently and precisely, has been widely used in an electronic notebook or personal information processing apparatus. Recently, There is provided a liquid crystal display device provided with a touch panel.

A liquid crystal display device having such a touch panel is formed by separately forming a touch panel and a liquid crystal panel, and attaching them to each other through an adhesive layer.

Hereinafter, a liquid crystal display device having the touch panel will be described in detail with reference to the drawings.

1 is a cross-sectional view schematically showing the structure of a liquid crystal display device having a general touch panel.

As shown in the figure, a liquid crystal display device having a touch panel is largely composed of a liquid crystal panel 10 with polarizing films 1 and 11 attached thereto and a touch panel 30 constituting a touch sensor TS.

The touch panel 30 is disposed on the upper portion of the liquid crystal panel 10 and the touch panel 30 is attached to the liquid crystal panel 10 through the adhesive layer 20.

The liquid crystal panel 10 mainly comprises a color filter substrate 5 and an array substrate 15 and a liquid crystal layer (not shown) formed between the color filter substrate 5 and the array substrate 15.

At this time, although not shown, the color filter substrate 5 is formed between a color filter composed of red (R), green (G), and blue (B) colors, and the sub-color filter. And a black matrix for blocking light passing through the liquid crystal layer, and a transparent common electrode for applying a voltage to the liquid crystal layer.

Further, a gate line and a data line are formed on the array substrate 15 so as to be vertically and horizontally arranged to define a pixel region. At this time, a thin film transistor, which is a switching element, is formed in a crossing region between the gate line and the data line, and pixel electrodes are formed in the pixel regions.

The color filter substrate 5 and the array substrate 15 constructed as described above are adhered to each other by a sealant formed on the periphery of the image display area to constitute the liquid crystal panel 10, And upper and lower polarizing films (11, 11) are respectively attached to the outside.

The touch panel 30 includes a cover film 35 formed with an upper electrode 32 and a lower film 31 having a lower electrode 33 formed thereon, And an insulating layer 34 formed therebetween so as to have a predetermined space therebetween.

Accordingly, the liquid crystal display device having a general touch panel has a thicker overall thickness, which causes a disadvantage of lowering the transmittance and color of the liquid crystal display device having the touch panel, Thereby reducing the reliability of the apparatus. That is, as described above, since the touch panel is attached to the liquid crystal panel with a predetermined space, the light loss increases due to the empty space, and the thickness of the liquid crystal display device increases.

Further, it causes a problem that the process cost is increased and the efficiency of the process is lowered.

Accordingly, when the touch panel is attached to the liquid crystal panel, the space generated between the touch panel and the liquid crystal panel is removed to minimize the light loss and thickness caused by the void space, and a polarizing film, And an embedded touch panel capable of minimizing surface reflection and loss of contrast ratio by positioning the touch panel at the outermost periphery of the display device.

In this case, the characteristics of the cover glass are different from those of current mass production, and equipment and process are required to be improved. In the case of the on-cell type, since the liquid crystal and the sealant are damaged at 150 ° C or higher, Deposition technology is needed. If the upper electrode is formed by low-temperature ITO deposition as in the conventional method, the touch visibility deteriorates due to the resistance problem. In addition, when the ITO thickness is increased or the heat treatment process is added to reduce the resistance, the transmittance decreases or the process increases Occurs.

The built-in touch panel can be roughly divided into an on-cell type and an in-cell type. In the on-cell type, a touch panel is disposed between a lower portion of the upper polarizer film and an upper glass substrate of the liquid crystal panel, Or a vacuum thin film deposition technique. The in-cell type includes a touch sensor capable of performing a touch function in the liquid crystal panel.

On the other hand, since the liquid crystal display device having such a touch panel is widely used in portable electronic devices, the size and weight of the liquid crystal display device can be improved to improve the portability of the electronic device. Therefore, efforts are also needed to reduce the size and weight of the liquid crystal display device itself.

There are various methods for reducing the thickness and weight of the liquid crystal display device, but there are limitations in reducing the structure and the essential components of the liquid crystal display device in the current state of the art. Moreover, since these essential components are small in weight, it is very difficult to reduce the thickness and weight of the entire liquid crystal display device by reducing the weight of these essential components.

A method for reducing the thickness and weight of a liquid crystal display device by reducing the thickness of a color filter substrate and an array substrate constituting a liquid crystal panel has been actively studied. However, since a thin substrate must be used, The substrate is bent or broken during the process.

In addition, in order to implement the on-cell type built-in touch panel using such a thin substrate, it is necessary to improve the equipment and process to pattern the ITO upper electrode.

An object of the present invention is to provide a method of manufacturing a thin liquid crystal display device having a touch panel in which a thin type touch panel is manufactured by applying a hybrid in-cell structure .

It is another object of the present invention to provide a method of manufacturing a thin liquid crystal display device having a touch panel that prevents breakage of a thin glass substrate by attaching an auxiliary substrate to a thin glass substrate.

It is still another object of the present invention to provide a method of manufacturing a thin liquid crystal display device having a touch panel on which a thin touch panel having improved performance at a low cost is obtained by using the process of the thin glass substrate.

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

In order to achieve the above object, a method of manufacturing a thin liquid crystal display device with a touch panel of the present invention comprises the steps of providing a thin first, second mother substrate and first, second, third auxiliary substrate; Attaching the first and second auxiliary substrates to the first and second thin mother boards, respectively; Performing an array process on the first mother substrate to which the first auxiliary substrate is attached; Forming a first touch electrode on the first mother substrate during the array process; Forming a second touch electrode on one surface of the second mother substrate to which the second auxiliary substrate is attached; Attaching the third auxiliary substrate to one surface of the second mother substrate on which the second touch electrode is formed, and then separating the second auxiliary substrate from the second mother substrate; Inverting a second mother board to which the third auxiliary board is attached; Performing a color filter process on the other surface of the second mother substrate; Attaching a first mother board on which the array process is performed and a second mother board on which the color filter process is performed; And separating the first and third auxiliary substrates from the first and second mother substrate.

In addition, another method for manufacturing a thin liquid crystal display device having a touch panel according to the present invention includes the steps of providing a thin first, second mother substrate and first, second, third auxiliary substrate; Attaching the first and second auxiliary substrates to the first and second thin mother boards, respectively; Performing an array process on the first mother substrate to which the first auxiliary substrate is attached; Forming a first touch electrode on the first mother substrate during the array process; Forming a second touch electrode on one surface of the second mother substrate to which the second auxiliary substrate is attached; Separating the second auxiliary substrate from the second mother substrate on which the second touch electrode is formed; Attaching the third auxiliary board to one surface of the second mother board where the second auxiliary board is separated, and then reversing the second mother board; Performing a color filter process on the other surface of the second mother substrate; Attaching a first mother board on which the array process is performed and a second mother board on which the color filter process is performed; And separating the first and third auxiliary substrates from the first and second mother substrate.

At this time, the thin first and second mother boards have a thickness of 0.1 mm to 0.4 mm.

In this case, the first, second, and third auxiliary substrates have a thickness of 0.3 mm to 0.7 mm.

In this case, after providing the thin first, second mother substrate and the first, second, third auxiliary substrate, the edge of the first, second mother substrate and the first, second, third auxiliary substrate. And cutting the inclined angle to form an edge cut.

In this case, the first mother substrate is cut in the inner direction more than the first auxiliary substrate of the lower portion is characterized in that the edge portion of the first auxiliary substrate of the lower portion is exposed.

In this case, the second mother substrate is cut in a more inward direction than the second and third auxiliary substrates of the lower portion, characterized in that the edge portion of the second and third auxiliary substrates of the lower portion is exposed.

The thin first and second mother substrates and the first and second auxiliary substrates may be bonded to each other in a vacuum state.

At this time, the bonding of the thin second mother substrate and the third auxiliary substrate may be performed by contacting the two substrates in a vacuum state.

And forming an overcoat layer on the entire surface of the second mother substrate on which the second touch electrode is formed.

And cutting the first and second mother substrates, from which the first and third auxiliary substrates are separated, into a plurality of liquid crystal panels.

As described above, in the method of manufacturing a thin liquid crystal display device having a touch panel according to the present invention, in manufacturing a thin touch panel by applying a hybrid in-cell structure, the process of thin glass substrate is performed using an auxiliary substrate. By proceeding, it is possible to manufacture a thin touch panel with improved performance at low cost.

Accordingly, the thickness of the entire liquid crystal display device becomes thinner than that of the conventional liquid crystal display device, and the thickness and weight of the television, monitor model, and portable electronic device can be reduced.

1 is a cross-sectional view schematically showing a structure of a liquid crystal display device having a general touch panel.
2 is a cross-sectional view schematically illustrating a structure of a liquid crystal display device having an on cell type touch panel.
3 is a cross-sectional view schematically illustrating a structure of a liquid crystal display device having a hybrid in cell type touch panel.
4A and 4B are cross-sectional views schematically illustrating a principle of operation of a touch panel in a liquid crystal display device having a hybrid in-cell type touch panel.
5 is a flowchart schematically illustrating a method of manufacturing a thin liquid crystal display device having a touch panel according to a first embodiment of the present invention.
6A to 6C are perspective views schematically illustrating a part of an array process in the method of manufacturing a thin liquid crystal display device having a touch panel according to the first embodiment of the present invention shown in FIG.
7A to 7G are perspective views schematically illustrating a part of a color filter process in the method of manufacturing a thin liquid crystal display device having a touch panel according to the first embodiment of the present invention shown in FIG.
8A to 8C are perspective views schematically illustrating a part of a cell process in the method of manufacturing a thin liquid crystal display device having a touch panel according to the first embodiment of the present invention shown in FIG. 5.
9A and 9B are plan views schematically illustrating first and third auxiliary substrates and first and second mother substrates having corner cuts according to the present invention;
FIG. 10 is a plan view schematically illustrating first and second mother substrates in which a push pin region is formed by attaching first and third auxiliary substrates having edge cuts according to the present invention; FIG.
FIG. 11 is a flowchart schematically illustrating a method of manufacturing a thin liquid crystal display device having a touch panel according to a second embodiment of the present invention. FIG.
12A to 12C are perspective views schematically showing a part of an array process in the method of manufacturing a thin liquid crystal display device having a touch panel according to a second embodiment of the present invention shown in FIG.
13A to 13G are perspective views schematically illustrating a part of a color filter process in the method of manufacturing a thin liquid crystal display device having a touch panel according to a second embodiment of the present invention shown in FIG.
14A to 14C are perspective views schematically illustrating a part of a cell process in the method of manufacturing a thin liquid crystal display device having a touch panel according to a second embodiment of the present invention shown in FIG.

Hereinafter, preferred embodiments of a method of manufacturing a thin liquid crystal display device having a touch panel according to the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. do. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

2 is a cross-sectional view schematically illustrating a structure of a liquid crystal display device having an on-cell type touch panel.

As shown in the drawing, a liquid crystal display device having an on-cell type touch panel includes a liquid crystal panel 110 and an upper polarizing film 101, to which polarizing films 101 and 111 are attached, And a touch panel 130 disposed between the upper color filter substrate 105 and the upper color filter substrate 105 to form a touch sensor.

As the on-cell type touch panel 130 is positioned between the upper polarizing film 101 and the upper color filter substrate 105 of the liquid crystal panel 110, the existing empty space is reduced and the thickness is reduced. The upper polarizing film 101 on which the panel 130 is formed is adhered to the cover glass 135 through the adhesive layer 132.

The liquid crystal panel 110 includes a color filter substrate 105 and an array substrate 115 and a liquid crystal layer (not shown) formed between the color filter substrate 105 and the array substrate 115.

At this time, although not shown, the color filter substrate 105 is a black matrix for distinguishing between the color filter consisting of red, green, blue sub-color filter and the sub-color filter and block the light transmitted through the liquid crystal layer, And it consists of a transparent common electrode for applying a voltage to the liquid crystal layer. However, the present invention is not limited to the twisted nematic (TN) method. In the case of the in-plane switching (IPS) method, the common electrode is formed on the lower array substrate 115.

Further, a gate line and a data line, which are vertically and horizontally arranged to define a pixel region, are formed on the array substrate 115. At this time, a thin film transistor, which is a switching element, is formed in a crossing region between the gate line and the data line, and pixel electrodes are formed in the pixel regions.

The color filter substrate 105 and the array substrate 115 constituted as described above are adhered to each other by a sealant formed on the outer periphery of the image display area to constitute a liquid crystal panel 110. Outside the liquid crystal panel 110, Upper and lower polarizing films 101 and 111 are attached.

The touch panel 130 is disposed between the upper polarizing film 101 and the upper color filter substrate 105 of the liquid crystal panel 110 and includes the upper electrode 132 and the lower electrode 133, And an insulating layer 134 formed between the upper electrode 132 and the lower electrode 133.

The lower electrode 133 is formed on the rear surface of the color filter substrate 105 and is made of indium-tin-oxide (ITO), indium-zinc-oxide (IZO) , Aluminum alloy, molybdenum (Mo), a double layer of molybdenum and aluminum, magnesium (Mg), gold (Au), silver (Ag)

An upper electrode 132 is formed on the lower electrode 133 with the insulating layer 134 interposed therebetween, and a transparent conductive material such as indium-tin-oxide (ITO), indium-zinc- (Al), an aluminum alloy, molybdenum (Mo), a double layer of molybdenum and aluminum, magnesium (Mg), gold (Au), silver (Ag), or the like which is an opaque conductive material.

The upper electrode 132 and the lower electrode 133 form a touch sensor.

3 is a cross-sectional view schematically illustrating a structure of a liquid crystal display device having a hybrid in-cell type touch panel.

As shown in the figure, a liquid crystal display device having a hybrid in-cell type touch panel includes a liquid crystal panel 210 having polarizing films 201 and 211 attached to the outside thereof, And a touch panel constituting a touch sensor.

In the hybrid in-cell type touch panel, the upper electrode 232 is formed on the rear surface of the color filter substrate 205 while the lower electrode 233 is formed on the upper surface of the array substrate 215 and is located in the liquid crystal panel 210 And the upper polarizing film 201 on which the insulating layer 234 is formed is adhered to the cover glass 235 through the adhesive layer 220.

The liquid crystal panel 210 includes a color filter substrate 205 and an array substrate 215 and a liquid crystal layer (not shown) formed between the color filter substrate 205 and the array substrate 215 .

At this time, although not shown, the color filter substrate 205 is a black matrix for distinguishing between the color filter consisting of a red, green, blue sub-color filter and the sub-color filter and block the light transmitted through the liquid crystal layer, And it consists of a transparent common electrode for applying a voltage to the liquid crystal layer. However, the present invention is not limited to such a twisted nematic scheme, and in the case of the transversal electric field type, the common electrode is formed on the lower array substrate 215.

Further, a gate line and a data line are formed on the array substrate 215 so as to be vertically and horizontally arranged to define a pixel region. At this time, a thin film transistor, which is a switching element, is formed in a crossing region between the gate line and the data line, and pixel electrodes are formed in the pixel regions.

The color filter substrate 205 and the array substrate 215 configured as described above are adhered to each other by a sealant formed on the periphery of the image display area to constitute a liquid crystal panel 210. Outside the liquid crystal panel 210, Upper and lower polarizing films 201 and 211 are attached.

The upper panel 232 is formed on the rear surface of the color filter substrate 205 and the lower panel electrode 233 is formed on the upper surface of the array substrate 215 to be positioned in the liquid crystal panel 210 .

That is, the upper electrode 232 is formed on the rear surface of the color filter substrate 205 and is made of a transparent conductive material such as indium-tin-oxide (ITO), indium-zinc-oxide (IZO) Al, an aluminum alloy, molybdenum (Mo), a double layer of molybdenum and aluminum, magnesium (Mg), gold (Au), silver (Ag)

The lower electrode 233 is formed on the array substrate 215 and is made of indium-tin-oxide (ITO), indium-zinc-oxide (IZO) , Aluminum alloy, molybdenum (Mo), a double layer of molybdenum and aluminum, magnesium (Mg), gold (Au), silver (Ag)

The upper electrode 232 and the lower electrode 233 form a touch sensor.

In the touch panel of the hybrid in-cell type according to the present invention having the above-described configuration, the touch sensor of the touch panel includes the upper electrode 232 and the lower electrode 233 and a gap spaced by a predetermined distance therebetween And when the finger or the like comes into contact with the capacitor, the capacitive change due to the variation of the fringe field of the capacitor is recognized and the capacitor acts as a touch sensor.

4A and 4B are cross-sectional views schematically illustrating a principle of operation of a touch panel in a liquid crystal display having a hybrid in-cell type touch panel.

In this case, for the sake of convenience of explanation, the switching thin film transistor is omitted and only the touch sensor TS is shown briefly.

4A, in a liquid crystal display device having a hybrid in-cell type touch panel according to the present invention, when a user's finger or the like is not touched to the surface of the cover glass 235 of the touch panel The fringe field formed between the upper electrode 232 and the lower electrode 233 is kept constant, so that there is no change in capacitance of the capacitor, so that the operation is not performed.

4B, when a touch of a user's finger or the like is generated on the surface of the cover glass 235 of the touch panel, the fringe field formed between the upper electrode 232 and the lower electrode 233 is touched The touch sensor senses that the touch sensor has been touched by the change caused by the influence of the finger or the like, thereby performing the operation at the time of touch.

For reference, reference numerals 206, 207, and 216 denote liquid crystals, color filters, and protective layers, respectively.

2. Description of the Related Art [0002] Recently, various applications of liquid crystal display devices have been gaining interest in lightweight and thin liquid crystal display devices, and attention has been paid to thinning of substrates that occupy the largest portion of the thickness of liquid crystal panels. In addition, in the 3D or touch system, a retarder or a touch panel of a touch function is added to the liquid crystal panel, thereby increasing the demand for further thinning. However, in the case of a thin substrate, the process progress is limited due to weak physical properties such as warpage and rigidity.

In order to solve this problem, a method of attaching an auxiliary substrate to a thin glass substrate has been tried, and a method of separating an auxiliary substrate from a thin glass substrate after completion of the process has been tried. In the present invention, by using an electrostatic force, a vacuum force, The process is performed by attaching an auxiliary substrate to a thin glass substrate, and an air injection path is formed between the thin glass substrate and the auxiliary substrate by using an edge cut formed on the glass substrate, And the auxiliary substrate is easily separated from the auxiliary substrate.

In particular, in the present invention, by applying the process of the thin glass substrate using the auxiliary substrate described above, it is possible to deposit ITO for electrode of the touch panel before application of the sealant or the liquid crystal alone. Therefore, And a liquid crystal display device having an improved thin type touch panel can be manufactured. That is, in the case of the present invention, ITO can be deposited at a high temperature because ITO deposition for the electrode of the touch panel can be performed before coating of the liquid crystal or sealing material, and the completed touch panel has a low resistance ITO electrode While it can utilize existing equipments and processes and can be manufactured at low cost.

Hereinafter, a method of manufacturing a thin liquid crystal display device having a touch panel according to the present invention will be described in detail with reference to the accompanying drawings.

5 is a flowchart schematically illustrating a method of manufacturing a thin liquid crystal display device having a touch panel according to a first embodiment of the present invention.

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

6A to 6C are perspective views schematically illustrating a part of an array process in the method of manufacturing a thin liquid crystal display device having a touch panel according to the first embodiment of the present invention illustrated in FIG. 5.

7A to 7G are perspective views schematically illustrating a part of a color filter process in the method of manufacturing a thin liquid crystal display device having a touch panel according to the first embodiment of the present invention shown in FIG. 5.

8A to 8C are perspective views schematically illustrating a part of a cell process in the method of manufacturing a thin liquid crystal display device having a touch panel according to the first embodiment of the present invention illustrated in FIG. 5.

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

As described above, there are various factors that determine the thickness and weight of the liquid crystal display device. Among them, the color filter substrate or the array substrate made of glass is the heaviest component among the other components of the liquid crystal display device. Therefore, it is most effective to reduce the thickness and weight of the glass substrate in order to reduce the thickness and weight of the liquid crystal display device.

There is a method of reducing the thickness or weight of the glass substrate by etching the glass substrate or using a thin glass substrate. In the first method, the glass etching process is further performed after the completion of the cell to reduce the thickness thereof.

Therefore, in the present invention, a thin glass substrate having a thickness of about 0.1 t to 0.4 t is used to carry out the array process, the color filter process and the cell process. At this time, a thin glass substrate is adhered to an auxiliary substrate, So as to minimize the influence of the warp of the glass substrate and to prevent the breakage of the thin glass substrate during movement. In this case, it is possible to deposit the ITO film for the electrode of the touch panel before applying the sealant and the liquid crystal alone, so that it is possible to manufacture a liquid crystal display device having a thin touch panel improved in performance at a low cost without requiring a low temperature ITO deposition technique . In this case, t stands for mm, 0.1t stands for a thickness of 0.1 mm, and 0.4 t stands for a thickness of 0.4 mm. In the following description, mm is denoted by t for convenience of explanation.

That is, when a thin glass substrate having a thickness of about 0.1 t to 0.4 t is introduced into a general liquid crystal display device manufacturing line, the occurrence of warpage is large and the substrate is severely deflected. Therefore, In addition, when the unit is loaded and unloaded in the unit process equipment, the occurrence of warpage occurs rapidly due to a small impact, resulting in frequent positional errors. As a result, failure failure increases due to collision, etc., .

Therefore, in the present invention, by attaching the auxiliary substrate before putting the thin glass substrate of 0.1 t to 0.4 t into the production line, it is possible to obtain the same or further improved warpage as that of the glass substrate having the thickness of about 0.7 t used in general liquid crystal display So that it is possible to prevent the problems such as the movement of the substrate or the deflection of the substrate during the unit process.

First, as shown in Figs. 6A and 7A, before the thin glass substrates of 0.1t to 0.4t are put into the manufacturing line of the array process and the color filter process, the thin first and second thinner substrates of 0.1t to 0.4t are made. The first and second auxiliary substrates 250a and 250b having a thickness of about 0.3 to 0.7t are attached to the glass substrates 215 and 205, respectively (S210 and S220). However, the present invention is not limited to the thicknesses of the first and second glass substrates 215 and 205 and the first and second auxiliary substrates 250a and 250b.

The thin first and second glass substrates 215 and 205 and the first and second auxiliary substrates 250a and 250b may be bonded to each other by contacting the two substrates 215, 205, 250a and 250b in a vacuum state. The bonding force between the two substrates 215, 205, 250a, and 250b may be estimated by electrostatic force, vacuum force, intermolecular bonding force or surface tension.

After the first and second auxiliary substrates 250a and 250b are attached to the thin first and second glass substrates 215 and 205 in this manner, as shown in FIGS. 6B and 6C, the above-described first The thin first glass substrate 215 (hereinafter, referred to as an array substrate for convenience of description) for the array substrate to which the auxiliary substrate 250a is attached is arranged on the array substrate 215 by an array process to define a pixel region. A plurality of gate lines and data lines are formed, and thin film transistors, which are driving elements connected to the gate lines and the data lines, are formed in the pixel regions. 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 (S230). At this time, these array elements are briefly represented by reference numeral 240 for the sake of convenience.

At this time, the first touch electrode 233 for a touch sensor is formed on the array substrate 215 through deposition and patterning of ITO at a high temperature during the array process.

In addition, as shown in FIG. 7B, the thin second glass substrate 205 (hereinafter, referred to as a color filter substrate for convenience of description) for the color filter substrate to which the second auxiliary substrate 250b described above is attached. The second touch electrode 232 for the touch sensor is formed through deposition and patterning of ITO at a high temperature by a color filter process on one surface (S240-1).

As illustrated in FIG. 7C, an overcoat layer 234 is formed on the entire surface of the color filter substrate 205 on which the second touch electrode 232 is formed.

Thereafter, as illustrated in FIG. 7D, the second auxiliary substrate 250b is separated from the color filter substrate 205 (S240-2).

Next, as shown in FIGS. 7E and 7F, after attaching the third auxiliary substrate 250c having a thickness of about 0.3 to 0.7t to the surface of the color filter substrate 205 on which the overcoat layer 234 is formed, The color filter substrate 205 to which the third auxiliary substrate 250c is attached is inverted so that the other side of the color filter substrate 205 faces upward (S240-3).

Subsequently, as shown in FIG. 7G, the color filter layer including the red, green, and blue sub-color filters on the other surface of the color filter substrate 205 is implemented by the color filter process. An electrode is formed (S240-4). Here, for the sake of convenience, these color filter components are represented schematically at 245.

At this time, when a transverse electric field type liquid crystal display device is manufactured, the common electrode is formed on the array substrate 215 on which the pixel electrode is formed through the array process.

Subsequently, as shown in FIG. 8A, an alignment film (not shown) is printed on the color filter substrate 205 and the array substrate 215, and then formed between the color filter substrate 205 and the array substrate 215. The alignment layer is rubbed to provide alignment control force or surface fixation force (that is, pretilt angle and orientation direction) to the liquid crystal molecules of the liquid crystal layer (S250 and S260).

A sealant is applied to the rubbed color filter substrate 205 to form a predetermined seal pattern, and a liquid crystal layer is formed by dropping liquid crystal on the array substrate 215 (S270, S280).

On the other hand, the color filter substrate 205 and the array substrate 215 are each formed on a large mother substrate. In other words, a plurality of panel regions are formed on each of the large-sized mother substrate, and a thin film transistor or color filter layer serving as a driving element is formed on each of the panel regions.

At this time, in the dropping method, a liquid crystal is supplied to the image display area of the first mother substrate of the large area on which the plurality of array substrates 215 are arranged or the image of the second mother substrate on which the plurality of color filter substrates 205 are arranged using a dispenser And the liquid crystal layer is formed by distributing the liquid crystal uniformly throughout the image display area by the pressure of attaching the first and second mother substrates to each other.

Therefore, when the liquid crystal layer is formed on the liquid crystal panel 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.

Subsequently, as shown in FIG. 8B, the first mother substrate and the first mother substrate are formed by the sealing material by applying pressure while the liquid crystal is dropped and the first mother substrate and the second mother substrate are coated with the sealing material as described above. 2, the mother substrate is bonded together and the liquid crystal dropped by the application of pressure is uniformly spread over the entire liquid crystal panel (S290-1).

By such a process, a plurality of liquid crystal panels in which a liquid crystal layer is formed are formed on the first and second mother substrates having a large area. As shown in FIG. 8C, the first and second large areas in which the plurality of liquid crystal panels are formed are formed. After separating the first and third auxiliary substrates from the mother substrate, the substrate is processed, cut into a plurality of liquid crystal panels, and the respective liquid crystal panels are inspected to produce liquid crystal display devices (S290-2 and S290-3).

At this time, if the push pin region is formed by using the corner cut of the substrate as described above, the first, second, and third auxiliary substrates can be easily separated, which will be described in detail with reference to the drawings.

9A and 9B are plan views schematically illustrating first and third auxiliary substrates and first and second mother substrates having corner cuts according to the present invention.

FIG. 10 is a plan view schematically illustrating first and second mother substrates in which a push pin region is formed by attaching first and third auxiliary substrates having edge cuts according to the present invention.

Referring to the drawings, as described above, in the present invention, a thin glass substrate of 0.1t to 0.4t, that is, 0.3t to 0.7t before the first and second mother substrates 215a and 205a are introduced into the manufacturing line. By attaching the first and third sub-substrates 250a and 250c each having a thickness, the movement or unit can be made to have the same or better warpage generation characteristics as the glass substrate having a thickness of about 0.7t used for a general liquid crystal display device. It is characterized in that it is possible to prevent problems such as substrate sag during the process progress.

In this case, the corners of the first and second mother substrates 215a and 205a and the first and third auxiliary substrates 250a and 250c in the bonded state, to which the plurality of liquid crystal panels 203 are assigned, have predetermined angles. This is called cutting, which is called edge cutting.

In particular, at least two corners of the thin first and second mother substrates 215a and 205a are cut inwardly in comparison with the first and third auxiliary substrates 250a and 250c for direction discrimination and post-processing. As a result, the edge portions of the first and third sub-substrates 250a and 250c are exposed, and this region is formed by the push pins to start the separation process of the first and third sub-substrates 250a and 250c. Push pins may be used as push pin areas A and B to which the push pins are applied.

11 is a flowchart schematically illustrating a method of manufacturing a thin liquid crystal display device having a touch panel according to a second embodiment of the present invention.

11 illustrates a method of manufacturing a liquid crystal display device in the case of forming a liquid crystal layer by using a liquid crystal dropping method, but the present invention is not limited thereto. It is also applicable to the manufacturing method of a liquid crystal display device in this case.

In addition, the thin liquid crystal display device having the touch panel according to the second embodiment of the present invention shown in FIG. 11 is described above except for the sequence between the separation of the second auxiliary substrate and the attachment of the third auxiliary substrate. It can be produced in substantially the same manner as the first embodiment of the present invention.

12A to 12C are perspective views schematically illustrating a part of an array process in the method of manufacturing a thin liquid crystal display device having a touch panel according to the second embodiment of the present invention shown in FIG. 11.

13A to 13G are perspective views schematically illustrating a part of a color filter process in the method of manufacturing a thin liquid crystal display device having a touch panel according to a second embodiment of the present invention shown in FIG. 11.

14A to 14C are perspective views schematically illustrating a part of a cell process in the method of manufacturing a thin liquid crystal display device having a touch panel according to the second embodiment of the present invention shown in FIG. 11.

First, as shown in Figs. 12A and 13A, 0.1t to 0.4t of thin first and second thin glass substrates of 0.1t to 0.4t before being put into a manufacturing line of an array process and a color filter process. The first and second auxiliary substrates 250a and 250b having a thickness of about 0.3 to 0.7t are attached to the glass substrates 215 and 205, respectively (S210 and S220). However, the present invention is not limited to the thicknesses of the first and second glass substrates 215 and 205 and the first and second auxiliary substrates 250a and 250b.

The thin first and second glass substrates 215 and 205 and the first and second auxiliary substrates 250a and 250b may be bonded to each other by contacting the two substrates 215, 205, 250a and 250b in a vacuum state. The bonding force between the two substrates 215, 205, 250a, and 250b may be estimated by electrostatic force, vacuum force, intermolecular bonding force or surface tension.

After the first and second auxiliary substrates 250a and 250b are attached to the thin first and second glass substrates 215 and 205 in this manner, as shown in FIGS. 12B and 12C, the above-described first The thin first glass substrate 215 for the array substrate having the auxiliary substrate 250a attached thereto, that is, the array substrate is arranged on the array substrate 215 by an array process to form a plurality of gate lines and data lines defining pixel regions. And a thin film transistor which is a driving element connected to the gate line and the data line in each of the pixel regions. 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 (S230). At this time, these array elements are briefly represented by reference numeral 240 for the sake of convenience.

At this time, the first touch electrode 233 for a touch sensor is formed on the array substrate 215 through deposition and patterning of ITO at a high temperature during the array process.

In addition, as shown in FIG. 13B, the thin second glass substrate 205 for the color filter substrate with the second auxiliary substrate 250b described above, ie, one surface of the color filter substrate, at a high temperature by a color filter process. The second touch electrode 232 for the touch sensor is formed through deposition and patterning of ITO (S240-1).

As illustrated in FIG. 13C, an overcoat layer 234 is formed on the entire surface of the color filter substrate 205 on which the second touch electrode 232 is formed.

Next, as shown in FIGS. 13D and 13E, the third auxiliary substrate 250c having a thickness of about 0.3 to 0.7t is attached to the surface of the color filter substrate 205 on which the overcoat layer 234 is formed. The second auxiliary substrate 250b is separated from the color filter substrate 205 (S240-2 ', S240-3').

Thereafter, as shown in FIG. 13F, the color filter substrate 205 to which the third auxiliary substrate 250c is attached is inverted so that the other side of the color filter substrate 205 faces upward.

Next, as shown in FIG. 13G, a color filter layer and a black matrix composed of red, green, and blue sub-color filters that implement color on the other side of the color filter substrate 205 by the color filter process; A common electrode is formed (S240-4). Here, for the sake of convenience, these color filter components are represented schematically at 245.

At this time, when the transverse electric field type liquid crystal display device is manufactured as described above, the common electrode is formed on the array substrate 215 on which the pixel electrode is formed through the array process.

Subsequently, as shown in FIG. 14A, an alignment film (not shown) is printed on the color filter substrate 205 and the array substrate 215, respectively, and then formed between the color filter substrate 205 and the array substrate 215. The alignment layer is rubbed to provide alignment control force or surface fixation force (ie, pretilt angle and alignment direction) to the liquid crystal molecules of the liquid crystal layer (S250 and S260).

A sealant is applied to the rubbed color filter substrate 205 to form a predetermined seal pattern, and a liquid crystal layer is formed by dropping liquid crystal on the array substrate 215 (S270, S280).

On the other hand, as described above, the color filter substrate 205 and the array substrate 215 are formed on the large-sized mother substrate. In other words, a plurality of panel regions are formed on each of the large-sized mother substrate, and a thin film transistor or color filter layer serving as a driving element is formed on each of the panel regions.

At this time, in the dropping method, a liquid crystal is supplied to the image display area of the first mother substrate of the large area on which the plurality of array substrates 215 are arranged or the image of the second mother substrate on which the plurality of color filter substrates 205 are arranged using a dispenser The liquid crystal layer is formed by distributing the liquid crystal uniformly throughout the image display area by the pressure of attaching the first and second mother substrate to each other.

Thereafter, as shown in FIG. 14B, the first mother substrate and the first mother substrate are formed by the sealing material by applying pressure while the liquid crystal is dropped and the first mother substrate and the second mother substrate on which the sealing material is applied are aligned as described above. 2, the mother substrate is bonded together and the liquid crystal dropped by the application of pressure is uniformly spread over the entire liquid crystal panel (S290-1).

By such a process, a plurality of liquid crystal panels having a liquid crystal layer are formed on the first and second mother substrates having a large area. As shown in FIG. After separating the first and third auxiliary substrates from the mother substrate, the substrate is processed, cut into a plurality of liquid crystal panels, and the respective liquid crystal panels are inspected to produce liquid crystal display devices (S290-2 and S290-3).

Thus, in the present invention, by applying the process of the thin glass substrate using the auxiliary substrate, it is possible to deposit ITO for the electrode of the touch panel before the liquid crystal is applied, but before the application of the sealing material, so that the performance is improved at low cost without the need for low temperature ITO deposition technology. It is possible to manufacture a liquid crystal display device having a touch 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.

205,215: thin glass substrate 250a, 250b, 250c: auxiliary substrate
232: second touch electrode 233: first touch electrode

Claims (11)

Providing thin first and second motherboards and first, second, and third auxiliary substrates;
Attaching the first and second auxiliary substrates to the first and second thin mother boards, respectively;
Performing an array process on the first mother substrate to which the first auxiliary substrate is attached;
Forming a first touch electrode on the first mother substrate during the array process;
Forming a second touch electrode on one surface of the second mother substrate to which the second auxiliary substrate is attached;
Attaching the third auxiliary substrate to one surface of the second mother substrate on which the second touch electrode is formed, and then separating the second auxiliary substrate from the second mother substrate;
Inverting a second mother board to which the third auxiliary board is attached;
Performing a color filter process on the other surface of the second mother substrate;
Attaching a first mother board on which the array process is performed and a second mother board on which the color filter process is performed; And
And separating the first and third auxiliary substrates from the first and second mother substrates. Providing thin first and second motherboards and first, second, and third auxiliary substrates;
Attaching the first and second auxiliary substrates to the first and second thin mother boards, respectively;
Performing an array process on the first mother substrate to which the first auxiliary substrate is attached;
Forming a first touch electrode on the first mother substrate during the array process;
Forming a second touch electrode on one surface of the second mother substrate to which the second auxiliary substrate is attached;
Separating the second auxiliary substrate from the second mother substrate on which the second touch electrode is formed;
Attaching the third auxiliary board to one surface of the second mother board where the second auxiliary board is separated, and then reversing the second mother board;
Performing a color filter process on the other surface of the second mother substrate;
Attaching a first mother board on which the array process is performed and a second mother board on which the color filter process is performed; And
And separating the first and third auxiliary substrates from the first and second mother substrates. The method for manufacturing a lightweight thin-type liquid crystal display device according to any one of claims 1 and 2, wherein the thin first and second mother substrates have a thickness of 0.1 mm to 0.4 mm. The method of claim 3, wherein the first, second, and third auxiliary substrates have a thickness of 0.3 mm to 0.7 mm. 5. The method of claim 4, wherein the first, second and third auxiliary substrates are provided after the thin first and second mother substrates and the first, second and third auxiliary substrates are provided. And a step of forming an edge cut by cutting at an inclined angle to the edge of the substrate. The light weight thin liquid crystal display of claim 5, wherein the first mother substrate is cut inwardly in comparison with the lower first auxiliary substrate to expose an edge portion of the lower first auxiliary substrate. Manufacturing method. The method of claim 6, wherein the second mother substrate is cut in the inner direction more than the second, the second auxiliary substrate of the lower side, characterized in that the lower edge portion of the second, third auxiliary substrate is exposed. Light weight thin liquid crystal display device manufacturing method. The method of claim 4, wherein the bonding of the thin first and second mother substrates to the first and second auxiliary substrates is performed by bringing the two substrates into contact with each other in a vacuum state. . The method of claim 8, wherein the bonding of the thin second mother substrate and the third auxiliary substrate is performed by bringing the two substrates into contact with each other in a vacuum state. 5. The method of claim 4, further comprising forming an overcoat layer on an entire surface of the second mother substrate on which the second touch electrode is formed. 6. The liquid crystal display device according to claim 4, further comprising a step of cutting the first and second mother substrates, from which the first and third auxiliary substrates are separated, into a plurality of liquid crystal panels Way.

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