KR20070065664A - Method for fabricating liquid crystal display and liquid crystal display fabricated by the same - Google Patents

Abstract

A method for manufacturing an LCD(Liquid Crystal Display) and an LCD manufactured by the same are provided to improve manufacturing productivity of the LCD and reduce a limitation in design by electrically connecting display panels through a conductive balls harder than an alignment layer. A first display panel(100) including a first electric-field generating electrode and a transfer electrode(190), and a second display panel(200) including a second electric-field generating electrode are provided. A conductive ball(500) is formed on at least one of the transfer electrode of the first display panel and the second electric-field generating electrode of the second display panel. A first alignment layer(410) and a second alignment layer(420) are formed on the first display panel and/or the second display panel where the conductive ball is formed. The first and second display panels are bonded to each other to burst the first and second alignment layers by the conductive ball, so that the conductive ball come in contact with the transfer electrode and the second electric-field generating electrode.

Description

The manufacturing method of a liquid crystal display device, and the liquid crystal display device manufactured by this method {Method for fabricating liquid crystal display and liquid crystal display fabricated by the same}

1 is a schematic longitudinal cross-sectional view of a liquid crystal display according to an exemplary embodiment of the present invention.

2A to 2C illustrate the shape of conductive balls included in a liquid crystal display according to an exemplary embodiment of the present invention.

3 is a schematic longitudinal cross-sectional view of a liquid crystal display according to another exemplary embodiment of the present invention.

4 is a schematic longitudinal cross-sectional view of a liquid crystal display according to another exemplary embodiment of the present invention.

5A through 8 are cross-sectional views illustrating intermediate structures of respective stages of a liquid crystal display device manufactured by a method of manufacturing a liquid crystal display device according to an exemplary embodiment of the present invention.

9A to 10 are cross-sectional views of intermediate structures of respective stages of a liquid crystal display device manufactured by a method of manufacturing a liquid crystal display device according to still another embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

100: first display panel 190: transfer electrode

200: second display panel 410, 420: first and second alignment layers

500: conductive ball

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a flat panel display device and a flat panel display device manufactured thereby, and more particularly, to a method for manufacturing a liquid crystal display device and a liquid crystal display device produced thereby.

In the liquid crystal display device, for example, liquid crystal molecules are filled with a predetermined thickness between two glass substrates to form a liquid crystal layer. For example, a thin film transistor, a pixel electrode, and an alignment layer are formed on the glass substrate on which light is incident. On the other glass substrate, a color filter, a common electrode, and an orientation film are formed, for example, and the polarizing plate is affixed on the outer side of two glass substrates.

Various methods for orienting liquid crystal molecules to a substrate in a vertical direction and a horizontal direction have been developed, but an alignment film made of a polymer material, for example, polyimide, is widely used in most liquid crystal display devices. However, in the alignment film made of a polymer compound such as polyimide, light degradation may occur due to the use environment, use time, or the like. When such light deterioration occurs, constituent materials such as an alignment film and a liquid crystal layer are decomposed, and the decomposition product may adversely affect the performance of liquid crystal molecules and the like.

Therefore, in order to overcome the material limitation of the alignment film composed of a high molecular compound, the research of the inorganic alignment film is in progress. In the case of the inorganic alignment film, it may be formed by a dry method such as chemical vapor deposition. When the alignment film is formed by such a dry method, a separate process for removing the alignment film in an unnecessary region is required.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a method of manufacturing a liquid crystal display device in which display panels are connected to each other without removing unnecessary alignment layers.

Another object of the present invention is to provide a liquid crystal display device manufactured by the method as described above.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following substrate.

According to another aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device, including a first display panel including a first field generating electrode and a transfer electrode and a second display panel including a second field generating electrode. Forming a conductive ball on at least one of the transfer electrode of the first display panel or the second field generating electrode of the second display panel; and the first display panel and / or the second conductive ball formed thereon. Forming a first alignment layer and a second alignment layer on the display panel, respectively, and bonding the first and second display panels together to rupture the first and second alignment layers with the conductive balls so that the conductive balls are transferred to the transfer electrode and the second. Contacting each of the electric field generating electrodes.

According to another aspect of the present invention, a liquid crystal display device includes: a first display panel including a first field generating electrode and a transfer electrode; and a first display panel facing the first display panel; A first alignment layer covering the second display panel, the conductive ball in contact with the transfer electrode and the common electrode, the first display panel and the conductive ball, and exposing a contact portion of the conductive ball with the common electrode; A second alignment layer covering the second display panel and exposing a contact portion of the second field generating electrode with the conductive ball.

According to another aspect of the present invention, there is provided a liquid crystal display device including a first display panel including a first field generating electrode and a transfer electrode, facing the first display panel, and disposing the second field generating electrode. A second display panel including a conductive ball in contact with the transfer electrode and the common electrode, a first alignment layer covering the first display panel, and exposing a contact portion of the transfer electrode with the conductive ball; A second alignment layer covering the conductive ball and exposing a contact portion of the conductive ball with the transfer electrode.

According to another aspect of the present invention, there is provided a liquid crystal display device including a first display panel including a first field generating electrode and a transfer electrode, opposing the first display panel, and including a second field generating electrode. A second display plate, a first conductive ball formed on the transfer electrode, a second conductive ball in contact with the first conductive ball, and formed on the second field generating electrode, the first display panel, and the A first alignment layer exposing a first conductive ball and exposing a contact portion of the first conductive ball with the second conductive ball and the second display panel and the second conductive ball, wherein the second conductive ball The 1st orientation film which exposes the contact part with 1 electroconductive ball is included.

Specific details of other embodiments are included in the detailed description and the drawings.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the present embodiments are intended to complete the disclosure of the present invention, and those skilled in the art to which the present invention pertains. It is provided to fully inform the scope of the invention, and the invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout. In the drawings, the sizes and relative sizes of layers and regions may be exaggerated for clarity.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. Also referred to herein as "above", "top", "top" or "bottom", "bottom" of a layer or film includes intervening another layer or film. In addition, unless there is another definition for the terminology used herein, all terms (including technical and scientific terms) used herein have a meaning that can be commonly understood by those skilled in the art. Could be used. In addition, the terms defined in the commonly used dictionaries are not ideally or excessively interpreted unless they are specifically defined clearly.

Hereinafter, a liquid crystal display according to an exemplary embodiment of the present invention will be described with reference to FIG. 1. 1 is a schematic longitudinal cross-sectional view of a liquid crystal display according to an exemplary embodiment of the present invention.

As shown in FIG. 1, the liquid crystal display according to the exemplary embodiment of the present invention is positioned between the first display panel 100, the second display panel 200, and the first and second display panels 100 and 200. The liquid crystal layer 300 for changing the transmittance of light introduced from the outside, the first and second alignment layers 410 and 420 for regulating the initial alignment of the liquid crystal molecules constituting the liquid crystal layer 300, and the first and second display panels ( Conductive balls 500 for conducting 100 and 200.

The first display panel 100 is formed of a gate electrode, a gate insulating film, a semiconductor layer, an ohmic contact layer, and a source / drain electrode on the first substrate 110 made of a transparent insulating material such as, for example, glass, in the form of a matrix. A thin film transistor (not shown) and a pixel electrode 180 which is electrically connected to the thin film transistor and receives an image signal voltage are included. In this case, the thin film transistor is connected to a gate line (not shown) that transmits a scan signal and a data line (not shown) that transmits an image signal, respectively, to turn on or off the pixel electrode 180 according to the scan signal. (off) The pixel electrode 180 is formed of, for example, a transparent conductive oxide such as indium tin oxide (ITO) or indium zinc oxide (IZO).

In addition, a common voltage applied to the first display panel 100 through the first display panel 100 side may be applied to the common electrode 280 of the second display panel 200 on the first substrate 110. And a transfer electrode 190. The transfer electrode 190 is formed of a transparent conductive oxide such as, for example, indium tin oxide (ITO) or indium zinc oxide (IZO).

The conductive ball 500 is positioned on the transfer electrode 190, and the conductive ball 500 electrically conducts the first display panel 100 and the second display panel 200. That is, the conductive ball 500 is in direct contact with the transfer electrode 190 of the first display panel 100 and the common electrode 280 of the second display panel 200, and applied to the first display panel 100. Is transferred to the common electrode 280 of the second display panel 200.

The conductive balls 500 may have a conductivity and preserve shape with respect to the compressive force acting on the outside of the first and second display panels 100 and 200, and have a hardness higher than the hardness of the alignment layers 410 and 420 described later. If it has a material is not particularly limited. For example, the conductive ball 500 may be in the form of a ball of metal material 500a composed of gold, silver, copper, or an alloy thereof, as shown in FIG. 2A. In addition, the conductive ball 500 is electrically conductive with a metal material 500a such as gold, silver, copper, or an alloy thereof on the outer surface of the ball made of a rigid polymer resin material 500b, as shown in FIG. 2B. The sexual material may be coated. In addition, the conductive ball 500 may have a shape including a plurality of protrusions 500c on the surface of the ball as shown in FIG. 2A or 2C, as shown in FIG. 2C. Such conductive balls 500 may have a diameter of, for example, 4 to 10 μm.

The second display panel 200 positioned opposite to the first display panel 100 may include a black matrix for preventing light leakage on the lower surface of the second substrate 210 made of a transparent insulating material such as, for example, glass. And a common electrode 280 that is an electric field generating electrode formed of a color filter (not shown) of red, green, and blue and a transparent conductive oxide such as indium tin oxide (ITO) or indium zinc oxide (IZO). .

The first and second alignment layers 410 and 420 are formed on the inner surfaces of the first and second display panels 100 and 200 as described above, that is, the field generating electrodes, and the first and second display panels 100, The first and second polarizers (not shown) are attached to the outer surface. The transmission axis of the two polarizing plates is orthogonal or parallel. In the case of a reflective liquid crystal display, one of two polarizers may be omitted.

The first and second alignment layers 410 and 420 are used to regulate the initial alignment of the liquid crystal molecules 310, and may be, for example, alignment layers including an inorganic material. Since the inorganic material has excellent chemical stability compared to the organic material, the alignment film containing the inorganic material has excellent stability to light compared to the alignment film containing the organic material. As inorganic material, for example SiO ₂ Alternatively, silicon oxide (SiOx) such as SiO, metal oxides such as MgO, ITO, amorphous silicon, and the like may be included in the alignment layer, and for example, silicon oxide may be included. In addition, the first and second alignment layers 410 and 420 may include, for example, DLC or FDLC. The first and second alignment layers 410 and 420 are harder than conventional alignment layers, and may be partially broken by external physical forces.

The first alignment layer 410 is in contact with the common electrode 280 of the second display panel 200 and the entire surface of the first display panel 100 except for a portion of the transfer electrode 190 which is in contact with the conductive ball 500. The outer side of the conductive ball 500 is formed except a part of the ball 500. In addition, the second alignment layer 420 is formed on the entire surface of the second display panel 200 except for a part of the common electrode 280 that is in contact with the conductive ball 500.

The thicknesses of the first and second alignment layers 410 and 420 may be particularly limited as long as the thickness of the first and second alignment layers 410 and 420 is easy to regulate the alignment of the liquid crystal molecules 310 at each portion, and may have a thickness capable of driving the liquid crystal display without increasing the driving voltage. May be, for example, 500 to 3000 kPa, preferably 700 to 2500 kPa.

The liquid crystal layer 300 is formed between the first and second display panels 100 and 200 on which the first and second alignment layers 410 and 420 are formed, respectively. The liquid crystal layer 300 may be, for example, a twisted nematic mode liquid crystal molecule having positive dielectric anisotropy, but is not limited thereto. The liquid crystal layer may include liquid crystal molecules having various modes according to the mode of the liquid crystal display. It may include.

In addition, a spacer for maintaining a constant gap between the display panels 100 and 200 between the first and second display panels 100 and 200 where the first and second alignment layers 410 and 420 are formed, respectively. 550 is formed. The spacer 550 has a spherical shape, for example, is made of an elastic plastic material, and has an adhesive property. The spacer 550 absorbs an impact from the outside of the liquid crystal display or a stress generated inside the liquid crystal display due to its elasticity. In the present specification, a spherical spacer has been described as an example. However, the present invention is not limited thereto, and a column spacer may be used to maintain the gap between the display panels.

In addition, a seal pattern 560 for bonding the first and second display panels 100 and 200 to each other is formed around the first and second display panels 100 and 200. The seal pattern 560 may be made of, for example, silver paste.

Subsequently, a liquid crystal display according to another exemplary embodiment of the present invention will be described with reference to FIG. 3. 3 is a schematic longitudinal cross-sectional view of a liquid crystal display according to another exemplary embodiment of the present invention.

As shown in FIG. 3, in the liquid crystal display according to another exemplary embodiment, the first display panel 100 except for a part of the transfer electrode 190, in which the first alignment layer 410 is in contact with the conductive ball 500. The second alignment layer 420 is formed on the entire surface, and the second alignment layer 420 is in contact with a portion of the common electrode 280 that is in contact with the conductive ball 500 and the transfer electrode 190 of the first display panel 100. Since it is the same as the liquid crystal display according to the exemplary embodiment of the present invention, except that the conductive ball 500 is formed on the outer surface of the conductive ball 500 except for a part of), overlapping description is omitted.

Subsequently, a liquid crystal display according to still another embodiment of the present invention will be described with reference to FIG. 4. 4 is a schematic longitudinal cross-sectional view of a liquid crystal display according to another exemplary embodiment of the present invention.

As shown in FIG. 4, the liquid crystal display according to the exemplary embodiment of the present invention includes the transfer electrode 190 of the first display panel 100 and the common electrode 280 of the second display panel 200 positioned opposite thereto. The first and second conductive balls 510 and 520 are formed in each of the first and second conductive balls 510 and the second conductive balls positioned on the side of the first display panel 100 and the second display panel 200, respectively. 520 is in contact with each other. In addition, the first alignment layer 410 may have an entire surface of the first display panel 100 except for a portion of the transfer electrode 190 in contact with the first conductive ball 510, the transfer electrode 200, and the second conductive ball 520. It is formed on the outer surface of the 1st electroconductive ball 510 except the part of the 1st electroconductive ball 510 which contact | connects with each other. In addition, the second alignment layer 420 may include a part of the common electrode 280 in contact with the second conductive ball 520 and a part of the second conductive ball 520 in contact with the first conductive ball 510. 2 is formed on the outer surface of the conductive ball 520. Except as described above, the liquid crystal display according to the exemplary embodiment of the present invention is the same as the liquid crystal display according to the exemplary embodiment of the present invention, and thus, the overlapping description thereof will be omitted.

Subsequently, a method of manufacturing a liquid crystal display according to an exemplary embodiment of the present invention will be described with reference to FIGS. 1 and 5A to 8. 5A through 8 are cross-sectional views illustrating intermediate structures of respective stages of a liquid crystal display device manufactured by a method of manufacturing a liquid crystal display device according to an exemplary embodiment of the present invention.

First, as shown in FIGS. 5A and 5B, first and second display panels are provided.

The first display panel 100 includes a gate electrode, a gate insulating film, a semiconductor layer, an ohmic contact layer, and a source / drain electrode on the first substrate 110 made of a transparent insulating material, and is formed of a thin film transistor (shown in a matrix). Of the pixel electrode 180 and the second display panel 200 formed of a transparent conductive oxide such as indium tin oxide (ITO) or indium zinc oxide (IZO), and electrically connected to the thin film transistor to receive an image signal. And a transfer electrode 190 for applying a common voltage to the common electrode 280.

In addition, the second display panel 200 includes a black matrix (not shown), a red, green, and blue color filter (not shown) and an indium tin oxide on the second substrate 210 made of a transparent insulating material to prevent light leakage. And a common electrode 280 which is an electric field generating electrode formed of a transparent conductive oxide such as (ITO) or indium zinc oxide (IZO).

Next, as illustrated in FIGS. 7A to 7C, conductive balls are formed on the first display panel.

As shown in FIGS. 2A to 2C, the conductive ball 500 has a ball shape of a metal material 500a composed of gold, silver or copper, or an alloy thereof, and gold on the outer surface of the ball of the polymer resin material 500b. The conductive material of the metal material 500a such as silver or an alloy thereof may be coated, or the protrusion 500c may be included on the surface of the ball as described above.

As a method of forming the conductive ball 500 as described above on the transfer electrode 190 of the first display panel 100, there are a dispensing method, an inkjet printing method, a roll printing method, and the like.

As shown in FIG. 7A, after the first display panel 100 is positioned on the table 610 that is movable up, down, left, and right, the transfer electrode 190 of the first display panel 100 is moved by moving the table 610 up, down, left, and right. The dispenser 620 is positioned on the. Next, the conductive ball 500, which is mixed with the adhesive solvent from the dispenser 620, is provided to the transfer electrode 190 to form the conductive 500 on the transfer electrode 190 of the first display panel 100. can do.

In addition, as illustrated in FIG. 7B, an inkjet head 630 including a plurality of cartridges 631 and 632 is positioned on the transfer electrode 190 of the first display panel 100 using an inkjet printing apparatus. The conductive balls 500 can be formed on the transfer electrode 190 of the first display panel 100 by providing the conductive balls mixed with the adhesive solvent from the inkjet head 630 on the transfer 190 electrodes. have.

In addition, as illustrated in FIG. 7C, the conductive ball 500 mixed with the adhesive solvent is transferred to the roller 640 provided with the transfer sheet 645 at a predetermined interval, and then rolled on the first display panel. Rolling may provide the conductive electrode 500 to the transfer electrode 190 to form the conductive ball 500 on the transfer electrode 190 of the first display panel 100.

Next, as shown in FIGS. 7A and 7B, first and second alignment layers 410 and 420 are formed on the first display panel 100 and the second display panel 200 on which the conductive balls 500 are formed. do. The first and second alignment layers 410 and 420 are, for example, alignment layers including inorganic materials, and may be formed by plasma thin film deposition such as chemical vapor deposition or sputtering. In this case, as the inorganic target, a silicon oxide (SiOx) such as SiO ₂ or SiO, a metal oxide such as MgO, ITO, or the like may be used. For example, silicon oxide may be used. For example, to form an alignment film to be formed when the alignment layer containing SiO ₂ include a may be used that composed of SiO ₂ as a target, SiO may be used that composed of SiO as a target. In addition, the first and second alignment layers 410 and 420 are alignment layers including, for example, DLC or FDLC, and may be formed by a plasma thin film deposition method such as chemical vapor deposition or sputtering.

The first and second alignment layers 410 and 420 formed by the plasma thin film deposition method are conformally formed on the first display panel 100 and the second display panel 200 on which the conductive balls 500 are formed to have a uniform thickness. . In this case, the thicknesses of the first and second alignment layers 410 and 420 are, for example, 500 to 3000 kPa, preferably 700 to 2500 kPa, but are not limited thereto.

Subsequently, as illustrated in FIG. 8, the first and second display panels 100 and 200 may be disposed on one of the first display panels or the second display panels 100 and 200, for example, the first display panel 100. In order to bond, the seal pattern 560 is formed of a silver paste or the like, and the liquid crystal molecules 310 are dropped on the first display panel 100 on which the seal pattern 560 is formed to form the liquid crystal layer 300. In addition, when the seal pattern 560 and the liquid crystal layer 300 are formed on any one of the first display panel 100 or the second display panel 200, for example, the first display panel 100. The spacer 550 is formed on the display panel 200.

Next, the first display panel 100 may be aligned with the side on which the first alignment layer 410 is formed and the side on which the second alignment layer 420 of the second display panel 200 is formed to face each other. The conductive ball 500 formed on the transfer electrode 190 of the first display panel 100 and the second display panel 200 and 100 are bonded to each other and the common electrode 280 of the second display panel 200. In order to be able to contact, pressure and heat are applied to the extent that the first and second alignment layers positioned between the conductive balls 500 and the second common electrode can be destroyed. For example, the substrate may be pressed at a load of about 10 kg to 2000 kg, and then fired at about 100 ° C. to 200 ° C. for 5 minutes to 300 minutes to bond the first and second display panels 100 and 200 to each other. As a result, as shown in FIG. 1, the conductive balls 500 harder than the first and second alignment layers 410 and 420 penetrate through the first and second alignment layers 410 and 420 and contact the second common electrode. Will be.

Then, the manufacturing method of the liquid crystal display device which concerns on another Example of this invention is demonstrated. In the liquid crystal display according to the exemplary embodiment of the present invention, as shown in FIG. 3, instead of forming the conductive balls 500 on the transfer electrode 190 of the first display panel 100, the liquid crystal display device of the first display panel 100 is formed. Method of manufacturing a liquid crystal display according to an exemplary embodiment of the present invention except that the conductive balls 500 are formed on the common electrode 280 of the second display panel 200 at a position corresponding to the transfer electrode 190. Since it can be manufactured by performing the same as, duplicate description is omitted.

Subsequently, a method of manufacturing a liquid crystal display device according to still another exemplary embodiment of the present invention will be described with reference to FIGS. 4, 5A, 5B, and 9A through 11. 9A to 11 are cross-sectional views of intermediate structures of respective stages of a liquid crystal display device manufactured by a method of manufacturing a liquid crystal display device according to still another embodiment of the present invention.

As shown in FIGS. 5A and 5B, first and second display panels 100 and 200 formed up to the pixel electrode 180, the transfer electrode 190, and the common electrode 280, respectively, are provided.

Next, as illustrated in FIGS. 9A and 9B, a ball having a metallic material, a ball coated with a conductive material of a metal material on a polymer resin ball, or a conductive ball 510 having protrusions on the surface of the ball as described above. , 520 on the common electrode 280 of the second display panel 200 corresponding to the position where the transfer electrode 190 of the first display panel 100 and the transfer electrode 190 of the first display panel 100 are formed. To form each. Here, the conductive ball 510 formed on the side of the first display panel 100 is called the first conductive ball 510, and the conductive ball 520 formed on the side of the second display panel 200 is referred to as the second conductive ball 520. It is called). In this case, the first and second conductive balls 510 and 520 may be placed at a desired position by a dispensing method, an inkjet printing method, a roll printing method, or the like. do.

Subsequently, as shown in FIGS. 10A and 10B, the same method as described above is performed on the first and second display panels 100 and 200 on which the first and second conductive balls 510 and 520 are formed, respectively. First and second alignment layers 410 and 420 are formed.

Next, as shown in FIG. 11, the first and second display panels 100 and 200 may be disposed on either one of the first display panel 100 or the second display panel 200, for example, the first display panel 100. In order to bond them together, the seal pattern 560 is formed of a silver paste or the like, and the liquid crystal molecules 310 are dropped on the first display panel 100 on which the seal pattern 560 is formed to form the liquid crystal layer 300. In addition, when the seal pattern 560 and the liquid crystal layer 300 are formed on any one of the first display panel 100 or the second display panel 200, for example, the first display panel 100. The spacer 550 is formed on the display panel 200.

Next, the first display panel 100 is disposed so that the side on which the first alignment layer 410 of the first display panel 100 is formed and the side on which the second alignment layer 420 of the second display panel 200 is formed face each other. After the first conductive ball 510 on the transfer electrode 190 and the second conductive ball 520 on the common electrode 280 of the second display panel 200 are aligned to correspond to each other, the first and second display panels First and second positioned between the first and second conductive balls 510, 520 such that the 100, 200 are bonded to each other and the first conductive balls 510 are in contact with the second conductive balls 520. Pressure and heat are applied such that the alignment layers 410 and 420 may be destroyed. For example, after pressing at a load of about 10 kg to 2000 kg, the first and second display plates 100 and 200 may be bonded by firing at about 100 ° C. to 200 ° C. for 5 minutes to 300 minutes. As a result, as shown in FIG. 4, the first and second conductive balls 510 and 520 that are harder than the first and second alignment layers 410 and 420 are formed through the first and second alignment layers 410 and 420. The first conductive balls 510 and the second conductive balls 520 are in contact with each other.

As described above, the liquid crystal display device manufactured according to each embodiment of the present invention does not require a separate removal process for an unnecessary portion of the alignment layer, for example, a photolithography process, so that the process efficiency can be increased, and the design It is possible to reduce the constraint of the phase.

In the present specification, the bottom gate type in which the semiconductor layer of the thin film transistor included in the liquid crystal display is positioned below the gate electrode has been described, but the top gate type in which the semiconductor layer is positioned above the gate electrode is described. A gate type thin film transistor is also applicable to the liquid crystal display device according to each embodiment of the present invention.

Further, in the present specification, a method of manufacturing a liquid crystal display device in which liquid crystal molecules are dropped on one of the display panels to form a liquid crystal layer, and then the display panels are bonded to each other is described. A liquid crystal display device can also be manufactured by the method of encapsulating liquid crystal molecules and forming a liquid crystal layer in between.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above embodiments but may be manufactured in various forms, and having ordinary skill in the art to which the present invention pertains. It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive.

According to the present invention as described above, by using conductive balls harder than the alignment layer, the display panels can be connected to each other without removing unnecessary alignment layers, thereby increasing productivity in manufacturing a liquid crystal display, and reducing design constraints.

Claims (31)

Providing a first display panel including a first field generating electrode and a transfer electrode and a second display panel including a second field generating electrode; Forming a conductive ball on at least one of the transfer electrode of the first display panel or the second field generating electrode of the second display panel; Forming a first alignment layer and a second alignment layer on the first display panel and / or the second display panel on which the conductive balls are formed; And Bonding the first and second display panels to rupture the first and second alignment layers with the conductive balls to contact the conductive balls with the transfer electrode and the second field generating electrode, respectively. Way. The method of claim 1, The said 1st and 2nd alignment film is a manufacturing method of the liquid crystal display device which is an inorganic alignment film. The method of claim 1, And the first and second alignment layers include silicon oxide, amorphous silicon, DLC, or FDLC. The method of claim 1, The conductive ball is a metal manufacturing method of a liquid crystal display device. The method of claim 4, wherein The conductive ball further comprises a polymer resin material ball in the metal material. The method according to claim 4 or 5, The conductive ball further comprises a projection on the surface of the liquid crystal display device manufacturing method. The method according to claim 4 or 5, The conductive ball is formed on the transfer electrode or the second field generating electrode by a dispensing method, an inkjet printing method, or a roll printing method. The method of claim 1, And forming a seal line on the first or second display panel before attaching the first and second display panels. The method of claim 8, And forming a liquid crystal layer by dropping liquid crystal molecules on the first or second display panel on which the seal lines are formed after the seal line forming step. The method of claim 8, And after the bonding of the first and second display panels, encapsulating liquid crystal molecules between the first and second display panels to form a liquid crystal layer. A first display panel including a first field generating electrode and a transfer electrode; A second display panel facing the first display panel and including a second field generating electrode; Conductive balls in contact with the transfer electrode and the common electrode, respectively; A first alignment layer covering the first display panel and the conductive ball and exposing a contact portion of the conductive ball with the common electrode; And And a second alignment layer covering the second display panel and exposing a contact portion of the second field generating electrode with the conductive balls. The method of claim 11, And the first and second alignment layers are inorganic alignment layers. The method of claim 11, The first and second alignment layers may include silicon oxide, amorphous silicon, DLC, or FDLC. The method of claim 11, The conductive ball is a metal liquid crystal display device. The method of claim 14, The conductive ball further comprises a ball of a polymer resin material inside the metal material. The method according to claim 14 or 15, The conductive ball further comprises a projection on the surface. The method of claim 11, The liquid crystal display device further comprising a liquid crystal layer between the first and second display panels. A first display panel including a first field generating electrode and a transfer electrode; A second display panel facing the first display panel and including a second field generating electrode; Conductive balls in contact with the transfer electrode and the common electrode, respectively; A first alignment layer covering the first display panel and exposing a contact portion of the transfer electrode with the conductive ball; And And a second alignment layer covering the second display panel and the conductive ball and exposing a contact portion of the conductive ball with the transfer electrode. The method of claim 18, And the first and second alignment layers are inorganic alignment layers. The method of claim 18, The first and second alignment layers may include silicon oxide, amorphous silicon, DLC, or FDLC. The method of claim 19, The conductive ball is a metal liquid crystal display device. The method of claim 21, The conductive ball further comprises a polymer resin ball in the metal material. The method of claim 21 or 22, The conductive ball further comprises a projection on the surface. The method of claim 18, The liquid crystal display device further comprising a liquid crystal layer between the first and second display panels. A first display panel including a first field generating electrode and a transfer electrode; A second display panel facing the first display panel and including a second field generating electrode; A first conductive ball formed on the transfer electrode; A second conductive ball in contact with the first conductive ball and formed on the second electric field generating electrode; A first alignment layer covering the first display panel and the first conductive ball and exposing a contact portion of the first conductive ball with the second conductive ball; And And a second alignment layer covering the second display panel and the second conductive ball and exposing a contact portion of the second conductive ball with the first conductive ball. The method of claim 25, And the first and second alignment layers are inorganic alignment layers. The method of claim 25, The first and second alignment layers may include silicon oxide, amorphous silicon, DLC, or FDLC. The method of claim 25, And the first and second conductive balls are made of metal. The method of claim 28, The first and second conductive balls further include a polymer resin ball in the metal material. The method of claim 28 or 29, The first and second conductive balls further comprise projections on the surface. The method of claim 25, The liquid crystal display device further comprising a liquid crystal layer between the first and second display panels.

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