WO2019208918A1

WO2019208918A1 - Liquid crystal panel and method for etching liquid crystal panel

Info

Publication number: WO2019208918A1
Application number: PCT/KR2019/001492
Authority: WO
Inventors: 이경찬
Original assignee: (주)코텍
Priority date: 2018-04-26
Filing date: 2019-02-07
Publication date: 2019-10-31

Abstract

Disclosed are a liquid crystal panel and a method for etching the liquid crystal panel. A liquid crystal panel according to the present invention is characterized by comprising: a first substrate; a second substrate installed spaced apart from the first substrate; a liquid crystal layer positioned between the first substrate and the second substrate; and a sealing part which seals the outside of the liquid crystal layer while the edges of the first substrate and the second substrate are attached by means of thermal bonding.

Description

Liquid crystal panel and etching method for liquid crystal panel

The present invention relates to a liquid crystal panel and an etching method for the liquid crystal panel, and more particularly to the liquid crystal panel and the liquid crystal panel etching method which can be easily bent because the liquid crystal panel is uniformly etched by the etching liquid. It is about.

Due to the development of the information society, display devices capable of displaying information have been actively developed. The display device includes a liquid crystal display device, an organic electro-luminescence display device, a plasma display panel, and a field emission display device.

Among these, liquid crystal displays have advantages such as light weight, small size, low power consumption, and full color video, and are widely applied to mobile phones, navigation, monitors, and televisions.

The liquid crystal display displays an image corresponding to the video signal by adjusting the light transmittance of the liquid crystal cells on the liquid crystal panel. Typically, the liquid crystal panel includes a lower substrate, an upper substrate, and a liquid crystal layer interposed between these substrates.

As the liquid crystal display device, a TFT-LCD using a thin film transistor (TFT) as a switching element is mainly used. A plurality of display signal lines, such as a gate line, a data line, a plurality of thin film transistors, and a pixel electrode, are formed on a lower substrate of two substrates of a liquid crystal panel disposed to face each other, and a color filter and a common electrode are formed on an upper substrate of two substrates. Is formed.

Since the liquid crystal panel is generally manufactured in a flat shape, when a curved display is required, an etching liquid is sprayed onto the liquid crystal panel to thin the liquid crystal panel to a predetermined thickness and then bend the liquid crystal panel.

A driving circuit unit may be installed at an edge of the liquid crystal panel, and the driving circuit unit may include a printed circuit board (PCB) for transmitting signals and a tape carrier package (TCP) for connecting the printed circuit board and the liquid crystal panel. do. In addition, when the etchant is injected into the edge of the liquid crystal panel, the edge portion of the liquid crystal panel may be easily broken, so that the masking operation is performed to prevent the etchant from being injected into the edge of the liquid crystal panel.

Conventionally, when bending an etched liquid crystal panel, since the edge portion of the liquid crystal panel which is not etched has a thicker thickness than the portion where the etch is performed, the edge portion is damaged during bending. Therefore, there is a need for improvement.

The background art of the present invention is Republic of Korea Patent Registration No. 10-1333770 (Nov. 21, 2013 registered, name of the invention: an etching apparatus, a curved display panel manufacturing apparatus including the same, a curved display panel manufacturing method using the same, and thereby Manufactured curved display panel).

The present invention has been made to improve the above problems, and an object of the present invention is that the liquid crystal panel is uniformly etched by the etching solution, so that the bending of the liquid crystal panel can be easily performed. To provide.

According to the present invention, a liquid crystal panel includes: a first substrate, a second substrate spaced apart from the first substrate, a liquid crystal layer positioned between the first substrate and the second substrate, and a first substrate and a second substrate. It is characterized in that the edge of the sealing by sealing the outer side of the liquid crystal layer is attached by heat fusion.

In addition, the sealing portion is characterized in that formed by the irradiation of the laser beam.

In addition, the edge of the first substrate and the second substrate is characterized in that it is cut by laser cutting after the etching is completed.

In addition, the first substrate and the second substrate, the etching is completed is characterized in that the curved surface is fixed.

Etching method for a liquid crystal panel according to the present invention comprises the steps of: supplying a liquid crystal panel having a liquid crystal layer between the first substrate and the second substrate, and irradiated with light along the edge of the liquid crystal panel sealed on the outside of the liquid crystal panel Forming a portion and etching the liquid crystal panel in which the sealing portion is formed.

In the forming of the sealing unit, the edge of the liquid crystal panel is irradiated with a laser beam to heat-bond the edges of the first substrate and the second substrate.

In addition, in the step of etching the liquid crystal panel, the front surface of the first substrate and the second substrate in contact with the etchant is uniformly etched, characterized in that no step is formed.

The method may further include cutting an edge of the liquid crystal panel after etching the liquid crystal panel.

In the cutting of the edge of the liquid crystal panel, the liquid crystal panel is cut by irradiating a laser to the edge of the liquid crystal panel.

The method may further include bent and fixing the liquid crystal panel whose edges are cut in a curved shape.

In the liquid crystal panel and the etching method for the liquid crystal panel according to the present invention, since the surface of the liquid crystal panel including the edge of the liquid crystal panel is uniformly etched, the bending of the liquid crystal panel can be easily performed and the phenomenon of preventing the liquid crystal panel from being damaged can be prevented. Can be.

In addition, since the present invention eliminates a separate masking operation for protecting the edge of the liquid crystal panel before etching, productivity can be improved by shortening the production time.

1 is a flowchart illustrating an etching method of a liquid crystal panel according to an exemplary embodiment of the present invention.

2 is a perspective view illustrating a liquid crystal panel according to an embodiment of the present invention.

3 is a perspective view illustrating a state in which a sealing unit is formed on an edge of a liquid crystal panel according to an exemplary embodiment of the present invention.

4 is a cross-sectional view illustrating a state in which a sealing unit is formed on an edge of a liquid crystal panel according to an exemplary embodiment of the present invention.

5 is a view illustrating a state in which an etchant is sprayed on the outside of the liquid crystal panel according to an exemplary embodiment of the present invention.

6 is a perspective view showing a state of cutting the edge of the liquid crystal panel according to an embodiment of the present invention.

FIG. 7 is a cross-sectional view illustrating a curved state of the liquid crystal panel according to the exemplary embodiment of the present invention. FIG.

Hereinafter, a liquid crystal panel and an etching method for a liquid crystal panel according to an embodiment of the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description.

In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to a user's or operator's intention or custom. Therefore, the definitions of these terms should be made based on the contents throughout the specification.

1 is a flowchart illustrating an etching method of a liquid crystal panel according to an embodiment of the present invention, FIG. 2 is a perspective view showing a liquid crystal panel according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention. 4 is a perspective view illustrating a state in which a sealing unit is formed at an edge of a liquid crystal panel according to an embodiment of the present invention. FIG. 4 is a cross-sectional view illustrating a state in which a sealing unit is formed at an edge of a liquid crystal panel according to an embodiment of the present invention. FIG. 6 is a view illustrating a state in which an etchant is injected to the outside of the liquid crystal panel according to an exemplary embodiment. FIG. 6 is a perspective view illustrating a state of cutting the edge of the liquid crystal panel according to the exemplary embodiment. FIG. A cross-sectional view illustrating a state in which a liquid crystal panel according to an embodiment of the present invention is bent in a curved shape.

As shown in FIG. 2 to FIG. 4, the liquid crystal panel 1 according to the exemplary embodiment of the present invention includes a first substrate 10 and a second substrate spaced apart from the first substrate 10. 20 and the liquid crystal layer 30 positioned between the first substrate 10 and the second substrate 20 and the

edges

12 and 22 of the first substrate 10 and the second substrate 20. The sealing part 40 which adheres by heat fusion and seals the outer side of the liquid crystal layer 30 is included.

The liquid crystal panel 1 may be variously modified within a technical concept of contacting a plurality of glasses. The liquid crystal panel 1 according to the exemplary embodiment is coupled in a state where the first substrate 10 and the second substrate 20 face each other, and the liquid crystal layer is interposed between the first substrate 10 and the second substrate 20. 30 is provided.

According to an embodiment, the first substrate 10 is a TFT substrate and the second substrate 20 is a CF substrate. The first substrate 10 and the second substrate 20 are spaced at set intervals, and a liquid crystal is injected between the first substrate 10 and the second substrate 20 to form the liquid crystal layer 30.

As shown in FIG. 3 and FIG. 4, the sealing part 40 is attached after the edge 12 of the first substrate 10 and the edge 22 of the second substrate 20 are melted by heat fusion. It may be formed in various shapes within the technical spirit of sealing the outside of the layer (30). Sealing unit 40 according to an embodiment is formed by the irradiation of the laser beam irradiated from the sealing device (50).

As illustrated in FIG. 6, the liquid crystal panel 1 is etched to a predetermined thickness using a method of spraying or applying an etchant to the liquid crystal panel 1 having the sealing portion 40 formed thereon. The liquid crystal panel 1 according to the exemplary embodiment is etched by the etchant injected from the etching apparatus 70.

In addition, the edge 12 of the first substrate 10 and the edge 22 of the second substrate 20 are cut by laser cutting after the etching is completed. The laser generated by the cutting device 60 is irradiated to a point within 1 mm from the end of the liquid crystal panel 1 so that cracks may occur or the edge 12 of the first substrate 10 having an uneven plane and the second substrate. The edge 22 of 20 is cut off.

In addition, the first substrate 10 and the second substrate 20 having completed etching have the same thickness over the entire area. Therefore, as illustrated in FIG. 7, the bending operation of bending the liquid crystal panel 1 in a curved shape may be more easily performed.

Hereinafter, an etching method for a liquid crystal panel according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, an etching method for a liquid crystal panel according to the present invention includes a liquid crystal panel 1 having a liquid crystal layer 30 between a first substrate 10 and a second substrate 20. It has a step (S10) of supplying.

1, 3, and 4, irradiating light rays along

edges

12 and 22 of the liquid crystal panel 1 to form the seal 40 on the outside of the liquid crystal panel 1. (S20). In the forming of the sealing part 40, the

edges

12 and 22 of the first and

second substrates

10 and 20 are irradiated by irradiating a laser beam to the

edges

12 and 22 of the liquid crystal panel 1. Since it is thermally fused to form a sealing portion (40). The laser irradiated from the sealing device 50 provided above the liquid crystal panel 1 is irradiated to the

edges

12 and 22 of the liquid crystal panel 1 in which the liquid crystal layer 30 is formed. The edge 12 of the first substrate 10 and the edge 22 of the second substrate 20 to which the laser is irradiated are melted and fused to form a sealing portion 40 on the outer side of the liquid crystal layer 30. Therefore, the liquid crystal layer 30 may be prevented from being damaged from the etchant, and the liquid crystal layer 30 may be prevented from leaking to the outside of the liquid crystal panel 1. In addition, due to the installation of the sealing part 40, a time and a cost required for installing or removing a separate masking tape may be reduced.

1 and 5, the liquid crystal panel 1 in which the sealing part 40 is formed is etched (S30). After moving the liquid crystal panel 1 having the sealing portion 40 formed around the

edges

12 and 22 to a position facing the etching apparatus 70, the liquid crystal panel 1 by the etching liquid sprayed from the etching apparatus 70. Both sides of are etched. In the step of etching the liquid crystal panel 1, since the entire area of the first substrate 10 and the second substrate 20 in contact with the etchant is etched uniformly so that no step is formed, the defective rate of post processing may be reduced.

1 and 6, after the etching of the liquid crystal panel 1, the

edges

12 and 22 of the liquid crystal panel 1 are cut (S40). The

edges

12 and 22 of the liquid crystal panel 1 may be cut by a tool having a blade, or may be cut by irradiation of light rays. In the cutting of the

edges

12 and 22 of the liquid crystal panel 1 according to the exemplary embodiment, the liquid crystal panel 1 is cut by irradiating a laser to the

edges

12 and 22 of the liquid crystal panel 1. The cutting device 60 is installed on the upper side facing the liquid crystal panel 1, and the laser beam irradiated from the cutting device 60 is irradiated along the

edges

12 and 22 of the liquid crystal panel 1 and the liquid crystal panel 1. Cut the

edges

12, 22 of the. If the

edges

12 and 22 of the liquid crystal panel 1 are not cut, when the

edges

12 and 22 of the liquid crystal panel 1 do not form a flat surface, the liquid crystal panel 1 is curved. It is more likely to cause cracks.

On the other hand, the laser irradiated from the cutting device 60 is irradiated along the

edges

12 and 22 of the liquid crystal panel 1 so that the sealing portion formed by heat fusion when cutting the

edges

12 and 22 of the liquid crystal panel 1 ( 40 may also be cut together, and if necessary, only the

edges

12 and 22 of the liquid crystal panel 1 may be cut, leaving the seal 40.

1 and 7, the liquid crystal panel 1 in which the

edges

12 and 22 are cut is curved and fixed in a curved shape (S50). In the state where the surface of the liquid crystal panel 1 is etched without uniform step, the

edges

12 and 22 of the liquid crystal panel 1 are removed, and the liquid crystal panel 1 is bent by bending the liquid crystal panel 1. Is formed into a curved shape.

As described above, since the surface of the liquid crystal panel 1 including the

edges

12 and 22 of the liquid crystal panel 1 is uniformly etched, the liquid crystal panel 1 can be bent easily. The phenomenon that the liquid crystal panel 1 is damaged can also be prevented. In addition, since the separate masking operation for protecting the

edges

12 and 22 of the liquid crystal panel 1 is omitted before etching, productivity can be improved by shortening the production time, and the liquid crystal panel 1 is damaged when the masking tape is removed. The phenomenon can also be prevented.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. will be. Therefore, the true technical protection scope of the present invention will be defined by the claims below.

Claims

First substrate;

A second substrate installed spaced apart from the first substrate;

A liquid crystal layer positioned between the first substrate and the second substrate; And

And a sealing part sealing the outer side of the liquid crystal layer by attaching the edge of the first substrate and the second substrate by heat fusion.
The method of claim 1,

The sealing unit is a liquid crystal panel, characterized in that formed by the irradiation of the laser beam.
The method of claim 1,

The edge of the first substrate and the second substrate is a liquid crystal panel, characterized in that after etching is completed by laser cutting.
The method of claim 1,

The first substrate and the second substrate, the etching is completed is curved in a curved shape, characterized in that the liquid crystal panel.
Supplying a liquid crystal panel having a liquid crystal layer between the first substrate and the second substrate;

Irradiating light rays along edges of the liquid crystal panel to form a sealing part on the outside of the liquid crystal panel; And

And etching the liquid crystal panel in which the sealing part is formed.
The method of claim 5,

In the forming of the sealing part, the edge of the liquid crystal panel is irradiated with a laser beam to heat-bond the edge of the first substrate and the second substrate, the etching method for a liquid crystal panel.
The method of claim 5,

And etching the liquid crystal panel to uniformly etch the entire surface of the first substrate and the second substrate in contact with the etchant so that a step is not formed.
The method of claim 5,

And cutting edges of the liquid crystal panel after the etching of the liquid crystal panel.
The method of claim 8,

Cutting the edge of the liquid crystal panel, the liquid crystal panel etching method, characterized in that for cutting the liquid crystal panel by irradiating a laser on the edge of the liquid crystal panel.
The method of claim 8,

Curving the liquid crystal panel cut edges in a curved shape; fixing the liquid crystal panel further comprising a.