KR20140145448A - Method of fabricating thin liquid crystal display device having touch panel - Google Patents

Method of fabricating thin liquid crystal display device having touch panel Download PDF

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KR20140145448A
KR20140145448A KR1020130067907A KR20130067907A KR20140145448A KR 20140145448 A KR20140145448 A KR 20140145448A KR 1020130067907 A KR1020130067907 A KR 1020130067907A KR 20130067907 A KR20130067907 A KR 20130067907A KR 20140145448 A KR20140145448 A KR 20140145448A
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South Korea
Prior art keywords
substrate
liquid crystal
auxiliary
mother
thin
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KR1020130067907A
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Korean (ko)
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KR102038847B1 (en
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신우섭
이대훈
오재영
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엘지디스플레이 주식회사
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/13338—Input devices, e.g. touch panels
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices

Abstract

The present invention relates to a method for manufacturing a thin liquid crystal display device with a touch panel. In manufacturing a thin touch panel by applying a hybrid-in-cell structure, a process of a thin glass substrate is performed by using an auxiliary substrate, thereby manufacturing a thin touch panel having enhanced performance at low costs. In particular, according to the method for manufacturing a thin liquid crystal display device with a touch panel of the present invention, a conductive film for a touch electrode is deposited on a color filter substrate and thermally treated so as to be crystallized, an auxiliary substrate is subsequently attached, the auxiliary substrate is separated from a liquid crystal panel which has completely undergone a cell process, and the conductive film is then patterned, thereby introduction of bubbles due to a step of the conductive film pattern is prevented and the number of processes can be reduced.

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,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a thin liquid crystal display device having a touch panel, and more particularly, to a method of manufacturing a thin liquid crystal display device including a touch panel of a hybrid in-cell structure .

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, though not shown, the color filter substrate 5 includes a color filter composed of sub-color filters of red (R), green (G), and blue (B) A black matrix for separating the liquid crystal layer from the liquid crystal layer and blocking light transmitted 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 in a state having a predetermined space above the liquid crystal panel, 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, An embedded touch panel capable of minimizing surface reflection and loss of contrast ratio by being positioned at an outermost position of a display device is being developed.

However, in this case, the characteristics of the cover glass are different from the current mass production model, and equipment and process are required to be improved. In case of the on-cell type touch panel, since the liquid crystal and the sealant are damaged at 150 ° C or more, Lt; RTI ID = 0.0 > ITO < / RTI > At this time, if the upper electrode is formed by low-temperature ITO deposition as in the prior art, the resistance to the touch problem (for example, the resistance of ITO having a thickness of 550 A does not satisfy the resistance condition of less than 50? /? On the other hand, when the thickness of the ITO is increased in order to reduce the resistance, the transmittance decreases.

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.

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 that prevents inflow of air bubbles due to steps of conductive film patterns and reduces the number of processes.

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

According to an aspect of the present invention, there is provided a method of manufacturing a thin liquid crystal display device having a touch panel according to an embodiment of the present invention includes providing first and second thin mother boards, first and second auxiliary substrates, ; Attaching the first auxiliary substrate to the thin first mother substrate; 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 conductive film for a second touch electrode on one surface of the second mother substrate; Attaching the second auxiliary substrate to a second mother substrate on which the conductive film for the second touch electrode is formed; Performing a color filter process on the other surface of the second mother substrate to which the second auxiliary substrate is attached; 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; Separating the first and second auxiliary substrates from the first and second mother substrate plates; And forming a second touch electrode by patterning the conductive film for the second touch electrode.

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

At this time, the first and second auxiliary substrates may have a thickness of 0.3 mm to 0.7 mm.

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

The conductive film for the second touch electrode may be formed of a transparent conductive material of indium-tin-oxide (ITO) or indium-zinc-oxide (IZO)

The method may further include forming a conductive film for the second touch electrode on one surface of the second mother substrate, and then performing a heat treatment to crystallize the conductive film for the second touch electrode.

At this time, when the oven is used, the heat treatment may be performed at a temperature of 150 to 300 ° C for 15 to 60 minutes.

At this time, after the conductive film for the second touch electrode is deposited using a roll sputter, the conductive film for the second touch electrode can be crystallized continuously through an in-line oven or a vacuum heat treatment.

The conductive film for the second touch electrode may be deposited at a temperature of 200 to 350 ° C to be crystallized at the same time as the deposition.

According to another aspect of the present invention, there is provided a method of manufacturing a thin liquid crystal display device including a touch panel, the method comprising: providing first and second thin mother boards 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 conductive film for a second touch electrode on one surface of a second mother substrate to which the second auxiliary substrate is attached; Attaching the third auxiliary substrate to one surface of a second mother substrate having the conductive film for the second touch electrode, and 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; Separating the first and third auxiliary substrates from the first and second mother substrate plates; And forming a second touch electrode by patterning the conductive film for the second touch electrode.

According to another aspect of the present invention, there is provided a method of manufacturing a thin liquid crystal display device including a touch panel, the method comprising: providing thin first and second mother substrates 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 conductive film for a second touch electrode on one surface of a second mother substrate to which the second auxiliary substrate is attached; Separating the second auxiliary substrate from a second mother substrate on which the conductive film for 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; Separating the first and third auxiliary substrates from the first and second mother substrate plates; And forming a second touch electrode by patterning the conductive film for the second touch electrode.

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

At this time, the first, second, and third auxiliary substrates may have a thickness of 0.3 mm to 0.7 mm.

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.

And separating the first and third auxiliary substrates from the first and second mother substrates, and then performing the heat treatment to crystallize the conductive film for the second touch electrode.

At this time, when the oven is used, the heat treatment may be performed at a temperature of 150 to 300 DEG C for 15 to 60 minutes.

As described above, in the method of manufacturing a thin liquid crystal display device having a touch panel according to an embodiment of the present invention, in manufacturing a thin touch panel by applying the hybrid in-cell structure, It is possible to manufacture a thin touch panel with improved performance at low cost by carrying out the process of the substrate.

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.

According to another aspect of the present invention, there is provided a method of manufacturing a thin liquid crystal display device having a touch panel, comprising: depositing a conductive film for a touch electrode on a color filter substrate; The patterning of the conductive film is performed after the auxiliary substrate is separated from the liquid crystal panel, thereby preventing the inflow of bubbles due to the step of the conductive film pattern and reducing the number of processes.

At this time, the thickness can be reduced by decreasing the resistance of ITO due to crystallization, thereby improving the transmittance and reducing the cost of equipment investment due to the decrease of adhesion and desorption processes.

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 illustrating a structure of a liquid crystal display device having a hybrid in-cell type touch panel according to the present invention.
3A and 3B are cross-sectional views schematically illustrating the principle of operation of a touch panel in a liquid crystal display device having a hybrid in-cell type touch panel according to the present invention.
4 is a flowchart schematically showing a method of manufacturing a thin liquid crystal display device having a touch panel according to a first embodiment of the present invention.
5A to 5C are perspective views schematically showing a part of an array process in a manufacturing method of a thin type liquid crystal display device having a touch panel according to a first embodiment of the present invention shown in FIG.
6A to 6F are perspective views schematically showing a part of a color filter process in a manufacturing method of a thin liquid crystal display device having a touch panel according to the first embodiment of the present invention shown in FIG.
7A to 7C are perspective views schematically showing a part of a cell process in a manufacturing method of a thin liquid crystal display device having a touch panel according to the first embodiment of the present invention shown in FIG.
8A and 8B are plan views schematically showing first and third auxiliary boards and first and second mother boards having corner cuts formed according to the present invention.
FIG. 9 is a plan view schematically showing first and second mother boards in a state in which first and third auxiliary boards having edge cuts are formed and a push pin region is formed according to the present invention. FIG.
10 is a flowchart schematically showing a method of manufacturing a thin liquid crystal display device having a touch panel according to a second embodiment of the present invention.
11A to 11C are perspective views schematically showing a part of an array process in a 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.
12A to 12F are perspective views schematically showing a part of a color filter process in a manufacturing method of a thin liquid crystal display device having a touch panel according to a second embodiment of the present invention shown in FIG.
13A to 13C are perspective views schematically showing a part of a cell process in a 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.
FIG. 14 is a flowchart schematically showing a method of manufacturing a thin liquid crystal display device having a touch panel according to a third embodiment of the present invention; FIG.
15A to 15C are perspective views schematically showing a part of an array process in a manufacturing method of a thin type liquid crystal display device having a touch panel according to a third embodiment of the present invention shown in FIG.
16A to 16D are perspective views schematically showing a part of a color filter process in a manufacturing method of a thin liquid crystal display device having a touch panel according to a third embodiment of the present invention shown in FIG.
17A to 17C are perspective views schematically showing a part of a cell process in a method of manufacturing a thin liquid crystal display device having a touch panel according to a third 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.

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

It will be understood that when an element or layer is referred to as being another element or "on" or "on ", it includes both intervening layers or other elements in the middle, do. On the other hand, when a device is referred to as "directly on" or "directly above ", it does not intervene another device or layer in the middle.

The terms spatially relative, "below," "lower," "above," "upper," and the like, And may be used to easily describe the correlation with other elements or components. Spatially relative terms should be understood to include, in addition to the orientation shown in the drawings, terms that include different orientations of the device during use or operation. For example, when inverting an element shown in the figures, an element described as "below" or "beneath" of another element may be placed "above" another element. Thus, the exemplary term "below" can include both downward and upward directions.

The terminology used herein is for the purpose of describing embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. &Quot; comprise "and / or" comprising ", as used in the specification, means that the presence of stated elements, Or additions.

2 is a cross-sectional view illustrating a structure of a liquid crystal display device having a hybrid in-cell type touch panel according to the present invention.

As shown in the figure, a liquid crystal display device having a hybrid in-cell type touch panel includes a liquid crystal panel 110 having polarizing films 101 and 111 attached to the outside thereof, And a touch panel constituting a touch sensor.

In the hybrid in-cell type touch panel, the upper electrode 132 is formed on the rear surface of the color filter substrate 105 while the lower electrode 133 is formed on the upper surface of the array substrate 115, 133 are all located within the liquid crystal panel 110, the existing void space is reduced and the thickness is reduced. At this time, the upper polarizing film 101 having the insulating layer 134 is adhered to the cover glass 135 through the adhesive layer 120.

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.

Although not shown, the color filter substrate 105 includes a black matrix for separating a color filter composed of sub-color filters of red, green, and blue and the sub-color filter and blocking light transmitted through the liquid crystal layer, And 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 (TN) method. In the case of an in-plane switching (IPS) method using a transverse electric field, 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 (not shown) formed on the periphery of the image display area to constitute the liquid crystal panel 110, And upper and lower polarizing films 101 and 111 are attached to the outer side of the polarizing film.

The upper panel 132 is formed on the rear surface of the color filter substrate 105 while the lower panel electrode 133 is formed on the array substrate 115 to form the upper and lower electrodes 132, 133 are all located within the liquid crystal panel 110.

That is, the upper electrode 132 is formed on the rear surface of the color filter substrate 105, and may be formed of indium-tin-oxide (ITO) or indium-zinc-oxide (IZO), which are transparent conductive materials. However, the present invention is not limited thereto.

The lower electrode 133 is formed on the array substrate 115 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 132 and the lower electrode 133 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 132 and the lower electrode 133 and a gap 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.

3A and 3B are cross-sectional views schematically illustrating the principle of operation of a touch panel in a liquid crystal display device having a hybrid in-cell type touch panel according to the present invention.

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.

3A, 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 135 of the touch panel The fringe field formed between the upper electrode 132 and the lower electrode 133 is maintained constant, so that there is no change in capacitance of the capacitor, so that the operation is not performed.

3B, when a user's finger or the like is touched on the surface of the cover glass 135 of the touch panel, the fringe field formed between the upper electrode 132 and the lower electrode 133 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 106, 107, and 116 denote a liquid crystal, a color filter, and a protective layer, 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.

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

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

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

6A to 6F are perspective views schematically showing a part of a color filter process in a manufacturing method of a thin type liquid crystal display device having a touch panel according to the first embodiment of the present invention shown in FIG.

7A to 7C are perspective views schematically showing a part of a cell process in a method of manufacturing a thin liquid crystal display device having a touch panel according to a first embodiment of the present invention shown in FIG.

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. 5A and 6A, before thin-type glass substrates of 0.1 t to 0.4 t are put into a manufacturing line of an array process and a color filter process, The first and second auxiliary substrates 150a and 150b of about 0.3t to 0.7t are respectively attached to the two glass substrates 115 and 105 (S110 and S120). However, the present invention is not limited to the thicknesses of the first and second glass substrates 115 and 105 and the first and second auxiliary substrates 150a and 150b.

Coalescence of the first and second glass substrates 115 and 105 and the first and second auxiliary substrates 150a and 150b can be achieved by bringing the two substrates 115, 105, 150a and 150b into contact with each other in a vacuum state. The bonding force between the two substrates 115, 105, 150a, 150b can be estimated by electrostatic force, vacuum force, intermolecular bonding force or surface tension.

After the first and second auxiliary substrates 150a and 150b are attached to the thin first and second glass substrates 115 and 105 as shown in Figs. 5B and 5C, A thin first glass substrate 115 (hereinafter, referred to as an array substrate for convenience of explanation) on which an auxiliary substrate 150a is mounted is arranged on the array substrate 115 by an array process to define a pixel region And a thin film transistor which is a driving element connected to the gate line and the data line is formed in each of the pixel regions. 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 (S130). Here, for convenience, these array components are represented schematically at 140.

At this time, a first touch electrode 133 for a touch sensor is formed on the array substrate 115 through deposition and patterning of an ITO thin film in the array process.

6B, a thin second glass substrate 105 (hereinafter referred to as a color filter substrate) for the color filter substrate to which the second auxiliary substrate 150b described above is attached A conductive film 130 for a second touch electrode, for example, an ITO thin film, is deposited on one surface (S140-1).

At this time, the second conductive layer 130 for a touch electrode may be deposited by clamping to the outside of the color filter substrate 105, or may be deposited on the entire surface of the color filter substrate 105 And then patterning is performed to remove the outer periphery.

As described above, in the present invention, the conductive film 130 for the second touch electrode is deposited on one surface of the color filter substrate 105, the auxiliary substrate is separated from the liquid crystal panel after the cell process is completed, 2 touch electrode. This is to prevent stain failure due to inflow of air bubbles into the outer frame and the inside of the color filter process due to the step difference of the ITO thin film pattern.

Then, as shown in FIG. 6C, the second auxiliary substrate 150b is separated from the color filter substrate 105 (S140-2).

Next, as shown in FIGS. 6D and 6E, a third auxiliary substrate 150c having a thickness of about 0.3t to 0.7t is formed on the surface of the color filter substrate 105 on which the conductive film 130 for the second touch electrode is deposited, The color filter substrate 105 to which the third auxiliary substrate 150c is attached is reversed so that the other surface of the color filter substrate 105 faces upward (S140-3).

6F, on the other side of the color filter substrate 105, a color filter layer composed of sub-color filters of red, green, and blue that realize color by the color filter process, a black matrix and a common electrode To form an electrode (S140-4). At this time, these color filter components are briefly shown at 145 for convenience.

At this time, when the transverse electric field type liquid crystal display device is manufactured, the common electrode is formed on the array substrate 115 on which the pixel electrode is formed through the array process.

7A, an alignment film (not shown) is printed on the color filter substrate 105 and the array substrate 115, respectively, and then an alignment film (not shown) is formed between the color filter substrate 105 and the array substrate 115 The alignment film is subjected to rubbing treatment (S150, S160) so as to provide an alignment regulating force or surface fixing force (i.e., pretilt angle and alignment direction) to the liquid crystal molecules of the liquid crystal layer.

A sealant is applied to the rubbed color filter substrate 105 to form a predetermined seal pattern, and a liquid crystal layer is formed by dropping liquid crystal on the array substrate 115 (S170, S180).

On the other hand, the color filter substrate 105 and the array substrate 115 are formed on a 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, the dropping method uses a dispenser to apply a liquid crystal to the image display area of a first mother substrate on which a plurality of array substrates 115 are arranged or a second mother substrate on which a plurality of color filter substrates 105 are arranged 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.

Thereafter, as shown in FIG. 7B, pressure is applied in a state in which the first mother substrate and the second mother substrate, to which the liquid crystal is dropped and the sealant is applied, are aligned as described above, 2 mother substrate, and at the same time, the liquid crystal dropped by application of pressure is uniformly spread over the entire liquid crystal panel (S190-1).

By this process, a plurality of liquid crystal panels having liquid crystal layers are formed on the large-area first and second mother substrate, and as shown in FIG. 7C, the first and second large- 2 The first and third auxiliary substrates are separated from the mother substrate (S190-2).

After the conductive film 130 for the second touch electrode deposited on the color filter substrate 115 is crystallized through a predetermined heat treatment, a second touch electrode (not shown) for the touch sensor is formed through patterning S190-3).

At this time, when the ITO thin film is used as the conductive film 130 for the second touch electrode, for example, the thickness thereof can be reduced compared to the conventional case. That is, the ITO thin film is thickly deposited to have a thickness of 1500 ANGSTROM considering the resistance and the transmittance. In the present invention, since the ITO thin film is crystallized through the heat treatment to reduce the resistance, the ITO thin film is deposited to a thickness of about 500 ANGSTROM Can be used.

For example, when the oven is used, the heat treatment may be carried out at a temperature of 150 to 300 ° C, preferably 230 ° C for 15 to 60 minutes, preferably 30 minutes.

For reference, the amorphous ITO has a resistance of 200? /? Whereas the crystalline ITO has a resistance of 50? /?, Which indicates that the resistance is reduced by about 75%. In addition, in the case of amorphous ITO having a thickness of 500 ANGSTROM, the transmittance of crystalline amorphous ITO is 80% or less, whereas the transmittance of crystalline ITO is 83%, which is 85% or more.

Thereafter, the liquid crystal panel is processed and cut into a plurality of liquid crystal panels, and each liquid crystal panel is inspected to manufacture a liquid crystal display device (S190-4).

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.

8A and 8B are plan views schematically showing first and third auxiliary boards and first and second mother boards having corner cuts formed according to the present invention.

9 is a plan view schematically showing first and second mother boards in a state where first and third auxiliary boards having corner cuts formed thereon are attached and a push pin area is formed according to the present invention.

Referring to the drawings, as described above, in the present invention, a glass substrate having a thickness of 0.1 t to 0.4 t, that is, first and second mother substrates 115a and 105a, The first and third auxiliary substrates 150a and 150c having a thickness of about 0.7t can be attached to each of the first and third auxiliary substrates 150a and 150c so as to have the same or further improved warp generation characteristics as those of a glass substrate having a thickness of about 0.7t, It is possible to prevent problems such as deflection of the substrate during the process.

At this time, the edges of the first and second mother substrates 115a and 105a and the first and third auxiliary substrates 150a and 150c, to which the plurality of liquid crystal panels 103 are allocated, are aligned at a predetermined oblique angle , Which is referred to as a corner cut.

In particular, at least two corners of the thin first and second mother substrates 115a and 105a are cut in a further inward direction than the first and third auxiliary substrates 150a and 150c for directional distinction and post- The edge portions of the first and third auxiliary substrates 150a and 150c are exposed in order to start the separation process of the first and third auxiliary substrates 150a and 150c, push pin regions A and B to which a push pin is applied.

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

10 illustrates a method of manufacturing a liquid crystal display device in which a liquid crystal layer is formed by a liquid dropping method. However, the present invention is not limited to the above-described method, The present invention is also applicable to a liquid crystal display device manufacturing method for forming a liquid crystal layer.

In addition, the thin liquid crystal display device having the touch panel according to the second embodiment of the present invention shown in FIG. 10 has the same structure as that of the liquid crystal display device described above except for the order of separating the second auxiliary substrate and attaching the third auxiliary substrate Can be produced in substantially the same manner as the first embodiment of the present invention.

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

12A to 12F are perspective views schematically showing a part of a color filter process in a manufacturing method of a thin type liquid crystal display device having a touch panel according to a second embodiment of the present invention shown in FIG.

FIGS. 13A to 13C are perspective views schematically showing a part of a cell process in a manufacturing method of a thin liquid crystal display device having a touch panel according to a second embodiment of the present invention shown in FIG.

First, as shown in Figs. 11A and 12A, before thin-type glass substrates of 0.1 t to 0.4 t are put into a manufacturing line of an array process and a color filter process, The first and second auxiliary substrates 150a and 150b of about 0.3t to 0.7t are respectively attached to the two glass substrates 115 and 105 (S110 and S120). However, the present invention is not limited to the thicknesses of the first and second glass substrates 115 and 105 and the first and second auxiliary substrates 150a and 150b.

As described above, the first and second glass substrates 115 and 105 and the first and second auxiliary substrates 150a and 150b are bonded together by bonding the two substrates 115, 105, 150a and 150b in vacuum At this time, the bonding force between the two substrates 115, 105, 150a and 150b can be estimated by electrostatic force, vacuum force, intermolecular bonding force, surface tension, or the like.

After the first and second auxiliary substrates 150a and 150b are attached to the thin first and second glass substrates 115 and 105 as shown in Figs. 11B and 11C, The thin first glass substrate 115, that is, the array substrate, for the array substrate to which the auxiliary substrate 150a is attached is arranged on the array substrate 115 by an array process to form a plurality of gate lines and data lines And a thin film transistor which is a driving element connected to the gate line and the data line is formed in each of the pixel regions. 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 (S130). Here, for convenience, these array components are represented schematically at 140.

At this time, a first touch electrode 133 for a touch sensor is formed on the array substrate 115 through deposition and patterning of an ITO thin film in the array process.

12B, a thin second glass substrate 105 for the color filter substrate to which the second auxiliary substrate 150b is attached, that is, a conductive film for a second touch electrode is formed on one surface of the color filter substrate, (130), for example, an ITO thin film is deposited (S140-1).

At this time, as described above, the conductive film 130 for the second touch electrode is deposited by being clamped to the outside of the color filter substrate 105, or deposited on the entire surface of the color filter substrate 105 And patterning is performed to remove the outer portion.

As described above, in the present invention, the conductive film 130 for the second touch electrode is deposited on one surface of the color filter substrate 105, the auxiliary substrate is separated from the liquid crystal panel after the cell process is completed, 2 touch electrode. This is to prevent stain failure due to inflow of air bubbles into the outer frame and the inside of the color filter process due to the step difference of the ITO thin film pattern.

Next, as shown in FIGS. 12C and 12D, a third auxiliary substrate 150c of about 0.3t to 0.7t is formed on the surface of the color filter substrate 105 on which the conductive film for a second touch electrode 130 is deposited, And then the second auxiliary substrate 150b is separated from the color filter substrate 105 (S140-2 ', S140-3').

12E, the color filter substrate 105 to which the third auxiliary substrate 150c is attached is inverted so that the other surface of the color filter substrate 105 faces upward.

Next, as shown in Fig. 12F, on the other side of the color filter substrate 105, a color filter layer composed of red, green, and blue sub-color filters that implement color by the color filter process and a black matrix and Thereby forming a common electrode (S140-4). At this time, these color filter components are briefly shown at 145 for convenience.

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 115 on which the pixel electrode is formed through the array process.

13A, an alignment film (not shown) is printed on the color filter substrate 105 and the array substrate 115, respectively, and then an alignment film (not shown) is formed between the color filter substrate 105 and the array substrate 115 The alignment layer is rubbed (S150, S160) so as to provide an alignment regulating force or a surface fixing force (i.e., a pretilt angle and alignment direction) to the liquid crystal molecules of the liquid crystal layer.

A sealant is applied to the rubbed color filter substrate 105 to form a predetermined seal pattern, and a liquid crystal layer is formed by dropping liquid crystal on the array substrate 115 (S170, S180).

On the other hand, as described above, the color filter substrate 105 and the array substrate 115 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, the dropping method uses a dispenser to apply a liquid crystal to the image display area of a first mother substrate on which a plurality of array substrates 115 are arranged or a second mother substrate on which a plurality of color filter substrates 105 are arranged 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. 13B, pressure is applied in a state in which the first mother substrate and the second mother substrate, to which the liquid crystal is dropped and the sealing material is coated as described above, are aligned and the first mother substrate 2 mother substrate, and at the same time, the liquid crystal dropped by application of pressure is uniformly spread over the entire liquid crystal panel (S190-1).

As shown in FIG. 13C, a plurality of liquid crystal panels having liquid crystal layers are formed on the first and second large-sized mother substrates by such a process, 2 The first and third auxiliary substrates are separated from the mother substrate (S190-2).

After the conductive film 130 for the second touch electrode deposited on the color filter substrate 115 is crystallized through a predetermined heat treatment, a second touch electrode (not shown) for the touch sensor is formed through patterning S190-3).

At this time, when the ITO thin film is used as the conductive film 130 for the second touch electrode, for example, the thickness thereof can be reduced compared to the conventional case. That is, as described above, the ITO thin film is thickly deposited to a thickness of 1500 ANGSTROM considering the resistance and the transmittance. In the present invention, since the ITO thin film can be crystallized through the heat treatment to reduce the resistance, It can be used by being deposited.

For example, when the oven is used, the heat treatment may be performed at a temperature of 150 to 300 ° C, preferably 230 ° C for 15 to 60 minutes, preferably 30 minutes.

Thereafter, the liquid crystal panel is processed and cut into a plurality of liquid crystal panels, and each liquid crystal panel is inspected to manufacture a liquid crystal display device (S190-4).

As described above, according to the present invention, by applying the process of the thin glass substrate using the auxiliary substrate, the ITO thin film for the electrode of the touch panel can be deposited before applying the sealant or the liquid crystal alone. A liquid crystal display device having an improved thin type touch panel can be manufactured.

On the other hand, in the first and second embodiments of the present invention, since the ITO thin film for the electrode of the touch panel is deposited on the color filter substrate and the ITO thin film is further patterned after the cell process, Will be added somewhat. Therefore, in the present invention, the deposition of the ITO thin film on the color filter substrate and the attachment of the second auxiliary substrate to the surface of the color filter substrate on which the ITO thin film is deposited can eliminate the attachment of the third auxiliary substrate and the separation process of the second auxiliary substrate Which will be described in detail through the following third embodiment of the present invention.

14 is a flowchart schematically showing a method of manufacturing a thin liquid crystal display device having a touch panel according to a third embodiment of the present invention.

14 illustrates a method of manufacturing a liquid crystal display device in which a liquid crystal layer is formed by a liquid crystal dropping method. However, the present invention is not limited to the above-described method, The present invention is also applicable to a liquid crystal display device manufacturing method for forming a liquid crystal layer.

14, a thin liquid crystal display device having a touch panel according to a third embodiment of the present invention includes a tactile display device including a tactile display device Can be produced in substantially the same manner as in the first and second embodiments of the present invention.

15A to 15C are perspective views schematically showing a part of an array process in a manufacturing method of a thin type liquid crystal display device having a touch panel according to a third embodiment of the present invention shown in FIG.

FIGS. 16A to 16D are perspective views schematically showing a part of a color filter process in a manufacturing method of a thin liquid crystal display device having a touch panel according to a third embodiment of the present invention shown in FIG.

FIGS. 17A to 17C are perspective views schematically showing a part of a cell process in a manufacturing method of a thin type liquid crystal display device having a touch panel according to a third embodiment of the present invention shown in FIG.

First, as shown in Fig. 15A, a thin glass substrate having a thickness of 0.1 t to 0.4 t is applied to a thin first glass substrate 215 having a thickness of 0.1 t to 0.4 t, The first auxiliary substrate 250a of about 0.7t is attached (S210). However, the present invention is not limited to the thickness of the thin first glass substrate 215 and the first auxiliary substrate 250a.

As described above, the attachment of the thin first glass substrate 215 and the first auxiliary substrate 250a is possible by bringing the two substrates 215 and 250a into contact with each other in a vacuum state. At this time, The bonding force can be estimated by electrostatic force, vacuum force, intermolecular bonding force or surface tension.

Next, as shown in Figs. 15B and 15C, the thin first glass substrate 215, that is, the array substrate for the array substrate to which the first auxiliary substrate 250a described above is attached is mounted on the array substrate 215 to form a plurality of gate lines and data lines that define pixel regions and thin film transistors which are driving elements connected to the gate lines and the data lines are formed in the pixel regions, respectively. 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, a first touch electrode 233 for a touch sensor is formed on the array substrate 215 through deposition and patterning of an ITO thin film in the array process.

On the other hand, in the case of the color filter substrate, as shown in FIG. 16A, a conductive film 230 for the second touch electrode, for example, an ITO thin film, is formed on one surface of the thin second glass substrate 205 of 0.1 t to 0.4 t (S220-1).

At this time, as described above, the conductive film for the second touch electrode 230 is deposited except for the outside of the second glass substrate 205 through the clamping process, or is deposited on the entire surface of the second glass substrate 205 And then patterning is performed to remove the outer periphery.

Thereafter, the conductive film 230 for the second touch electrode deposited on the second glass substrate 205 is crystallized through a predetermined heat treatment (S220-2).

In this case, when the ITO thin film is used as the conductive film 230 for the second touch electrode, for example, its thickness can be reduced compared to the conventional case. In the case of using the oven, the heat treatment may be carried out at a temperature of 150 to 300 DEG C, preferably 230 DEG C for 15 to 60 minutes, preferably 30 minutes.

However, the present invention is not limited thereto, and the conductive film 230 for the second touch electrode may be deposited at a temperature of 200 to 350 ° C and crystallized at the same time as the deposition. After the second conductive film 230 for a touch electrode is deposited using a roll sputter, the conductive film 230 for the second touch electrode 230 is continuously formed through an in-line oven or a vacuum heat treatment. It may crystallize.

Next, as shown in FIG. 16B, a second auxiliary substrate 250b of about 0.3 to 0.7t is attached to the surface of the second glass substrate 205 on which the conductive film for a second touch electrode 230 is deposited (S220-3). However, the present invention is not limited to the thicknesses of the thin second glass substrate 205 and the second auxiliary substrate 250b.

As described above, the attachment of the thin second glass substrate 205 and the second auxiliary substrate 250b is possible by bringing the two substrates 205 and 250b into contact with each other in a vacuum state. At this time, The bonding force can be estimated by electrostatic force, vacuum force, intermolecular bonding force or surface tension.

Then, as shown in FIG. 16C, the color filter substrate 205 to which the second auxiliary substrate 250b is attached is reversed so that the other surface of the color filter substrate 205 faces upward.

Next, as shown in FIG. 12B, on the other surface of the color filter substrate 205, a color filter layer composed of red, green, and blue sub-color filters that implement color by the color filter process, A common electrode is formed (S240). 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.

17A, an alignment film (not shown) is printed on the color filter substrate 205 and the array substrate 215, respectively, and then an alignment film (not shown) is formed between the color filter substrate 205 and the array substrate 215 The alignment film is rubbed (S250, S260) so as to provide an alignment regulating force or a surface fixing force (that is, a pretilt angle and alignment direction) to the liquid crystal molecules of the liquid crystal layer.

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. 17B, pressure is applied in a state in which the first mother substrate and the second mother substrate, to which the liquid crystal is dropped and the sealing material is coated, are aligned as described above, 2 mother substrate, and at the same time, the liquid crystal dropped by application of pressure is uniformly spread over the entire liquid crystal panel (S290-1).

By this process, a plurality of liquid crystal panels having liquid crystal layers are formed on the large-area first and second mother substrate, and as shown in Fig. 17C, the first and second large- 2 The first and third auxiliary substrates are separated from the mother substrate (S290-2).

Then, a second touch electrode (not shown) for a touch sensor is formed through predetermined patterning, and then processed and cut into a plurality of liquid crystal panels, and each liquid crystal panel is inspected to manufacture a liquid crystal display device (S290-3 , 290-4).

As described above, in the third embodiment of the present invention, after the ITO thin film is deposited on the color filter substrate, the second auxiliary substrate is attached to the surface of the color filter substrate on which the ITO thin film is deposited, It is possible to omit the separation process, so that the equipment investment cost is reduced and the tact time is reduced.

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.

105, 205: thin second glass substrate 115, 215: thin first glass substrate
150a, 250a: first auxiliary substrate 150b, 250b: second auxiliary substrate
150c: third auxiliary substrate

Claims (16)

Providing thin first and second motherboards and first and second auxiliary substrates;
Attaching the first auxiliary substrate to the thin first mother substrate;
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 conductive film for a second touch electrode on one surface of the second mother substrate;
Attaching the second auxiliary substrate to a second mother substrate on which the conductive film for the second touch electrode is formed;
Performing a color filter process on the other surface of the second mother substrate to which the second auxiliary substrate is attached;
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;
Separating the first and second auxiliary substrates from the first and second mother substrate plates; And
And forming a second touch electrode by patterning the conductive film for the second touch electrode. The method of claim 1, wherein the thin first and second mother substrates have a thickness of 0.1 mm to 0.4 mm. The method of claim 2, wherein the first and second auxiliary substrates have a thickness of 0.3 mm to 0.7 mm. The touch panel according to claim 1, further comprising a step of cutting the first and second mother substrates, from which the first and second auxiliary substrates are separated, into a plurality of liquid crystal panels A method of manufacturing a liquid crystal display device. The touch panel according to claim 1, wherein the conductive film for the second touch electrode is formed of a transparent conductive material of indium-tin-oxide (ITO) or indium-zinc-oxide (IZO) A method of manufacturing a display device. The touch panel of claim 5, further comprising a step of forming a conductive film for a second touch electrode on one side of the second mother substrate, and then performing a heat treatment to crystallize the conductive film for the second touch electrode. Wherein the liquid crystal display device is a thin liquid crystal display device. [7] The method of claim 6, wherein the heat treatment is performed at a temperature of 150 to 300 [deg.] C for 15 to 60 minutes using an oven. The method according to claim 6, characterized in that the conductive film for the second touch electrode is crystallized by continuously in-line oven or vacuum heat treatment after the conductive film for the second touch electrode is deposited using a roll sputter Wherein the liquid crystal display device is a liquid crystal display device. 6. The method of claim 5, wherein the conductive film for the second touch electrode is deposited at a temperature of 200 to 350 DEG C and crystallized at the same time as deposition. 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 conductive film for a second touch electrode on one surface of a second mother substrate to which the second auxiliary substrate is attached;
Attaching the third auxiliary substrate to one surface of a second mother substrate having the conductive film for the second touch electrode, and 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;
Separating the first and third auxiliary substrates from the first and second mother substrate plates; And
And forming a second touch electrode by patterning the conductive film for the second touch electrode. 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 conductive film for a second touch electrode on one surface of a second mother substrate to which the second auxiliary substrate is attached;
Separating the second auxiliary substrate from a second mother substrate on which the conductive film for 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;
Separating the first and third auxiliary substrates from the first and second mother substrate plates; And
And forming a second touch electrode by patterning the conductive film for the second touch electrode. The thin liquid crystal display device manufacturing method according to any one of claims 10 and 11, wherein the thin first and second mother substrates have a thickness of 0.1 mm to 0.4 mm . 13. The method of claim 12, wherein the first, second, and third auxiliary substrates have a thickness of 0.3 mm to 0.7 mm. 13. The touch panel according to claim 12, 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. A method of manufacturing a liquid crystal display device. The method of claim 12, further comprising the step of separating the first and third auxiliary substrates from the first and second mother substrates and then performing a heat treatment to crystallize the conductive film for the second touch electrode The liquid crystal display device comprising: a touch panel; 16. The method of claim 15, wherein the heat treatment is performed at a temperature of 150 to 300 DEG C for 15 to 60 minutes using an oven.
KR1020130067907A 2013-06-13 2013-06-13 Method of fabricating thin liquid crystal display device having touch panel KR102038847B1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100462824B1 (en) * 1996-11-27 2005-04-13 삼성전자주식회사 Manufacturing method of liquid crystal display device for thin film transistor
JP2010181563A (en) * 2009-02-04 2010-08-19 Sony Corp Display device, touch sensor, and method for manufacturing display device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100462824B1 (en) * 1996-11-27 2005-04-13 삼성전자주식회사 Manufacturing method of liquid crystal display device for thin film transistor
JP2010181563A (en) * 2009-02-04 2010-08-19 Sony Corp Display device, touch sensor, and method for manufacturing display device

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