KR101254600B1 - Flat Panel Display Divice and Method For Fabricating The Same - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat panel display device and a method of manufacturing the same, and more particularly, to a flat panel display device having a flat panel display panel formed by bonding two substrates together, wherein at least one corner is formed on an outer surface of the two substrates. By providing a flat panel display device having a portion and incorporating an optical film in its concave portion, the step of reducing the weight of the flat panel display device and generating a step on the surface of the flat panel display panel due to the optical film attached to the surface of the flat panel display panel. It is characterized by preventing that.

Flat Panel Display, Concave, Optical Film

Description

Flat Panel Display Divice and Method For Fabricating The Same

1A is a perspective view of a flat panel display device according to the prior art.

FIG. 1B is a cross-sectional view illustrating a cross section taken along the line II ′ of FIG. 1A; FIG.

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

FIG. 2B is a cross-sectional view taken along the line II-II 'of FIG. 2A;

3 is a perspective view of a liquid crystal display according to another exemplary embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat panel display device and a method of manufacturing the same, and more particularly, to a flat panel display device having a flat panel display panel formed by joining two substrates, each of the two substrates having recesses formed to open at least one edge thereof. By providing a flat panel display device, it is desirable to reduce the weight of the flat panel display device and to prevent a step from occurring on the surface of the flat panel display panel by an optical film attached to the surface of the flat panel display panel.

As the information society develops, the demand for display devices for outputting various kinds of information is diversified.PDP (Plasma Display Panel), FED (Field Emission Display), and OLED (Organic) are used to replace existing CRT (Cathode Ray Tube). Various flat panel display devices such as a light emitting diode (LCD) and a liquid crystal display (LCD) have emerged.

Such flat panel display apparatuses generally include a flat panel display panel for realizing an image, and the flat panel display panel is formed by bonding two substrates together.

In addition, optical films are generally attached to both surfaces of the flat panel display panel.

Next, a configuration of a liquid crystal display device, which is a typical flat panel display device, will be described with reference to the drawings.

 1A is a perspective view showing a liquid crystal display device according to the prior art.

The liquid crystal display according to the related art is bonded to the first substrate 11 having the first and second surfaces, and the first surface facing the first surface of the first substrate 11 with a predetermined gap therebetween. The second substrate 13, the first polarizing film 15 attached to the second surface of the first substrate 11, and the second polarizing film attached to the second surface of the second substrate 13 ( 17).

Such a liquid crystal display device is divided into a display unit for displaying an image and a non-display unit for blocking light transmitted from an area other than the display unit.

The first polarizing film 15 and the second polarizing film 17 are previously cut to a size that can cover the display portions of the first substrate 11 and the second substrate 13.

1B is a cross-sectional view illustrating a cross section taken along the line II ′ of FIG. 1A.

As shown in FIG. 1B, the size of the first polarizing film 15 and the second polarizing film 17 is the size of the first substrate 11 and the second substrate 13, respectively. Since not larger, a step is formed between the portion where the polarizing film is attached and the portion where the polarizing film is not attached to the surface of the liquid crystal display device.

Next, a manufacturing method of the liquid crystal display device according to the prior art will be described.

According to the related art, a method of manufacturing a liquid crystal display device includes forming a thin film transistor array including a thin film transistor on a first surface of a first substrate, and forming a color filter array including a color filter layer on a first surface of a second substrate. And bonding the first substrate and the second substrate to have a predetermined gap with the first surface of the first substrate so that the first surface of the second substrate faces the first surface, and first polarization on the second surface of the first substrate. Attaching a film, attaching a second polarizing film to a second surface of the second substrate.

The first polarizing film and the second polarizing film have sizes corresponding to the display unit of the liquid crystal panel formed by bonding the first substrate and the second substrate together.

Although the liquid crystal display device has been described as an example, other flat panel display devices in which an optical film is attached to at least one surface of the flat panel display panel and the flat panel display panel, such as a PDP or an OLED, have a similar configuration.

However, the flat panel display device according to the prior art has the following problems.

As the optical film is attached to the surface of the flat panel display panel, the thickness of the flat panel display device increases as much as the thickness of the optical film, making it difficult to reduce the thickness of the flat panel display device.

 In addition, there is a problem that a step is formed between a portion to which the optical film is attached and a portion to which the optical film is not attached in the flat panel display panel.

The present invention has been made to solve the above problems, by forming a recess in the substrate of the flat panel display panel to attach the optical film to the recess, eliminating the step on the surface of the flat panel panel and the thickness and weight of the flat panel display device To increase the thickness of the flat panel display device and seek to reduce the weight.

According to an aspect of the present invention, there is provided a flat panel display device including: first and second substrates bonded to each other with a predetermined gap therebetween, a first recess formed in the first substrate so that at least one edge thereof is opened, and A first optical film attached to the first recessed portion to cover the display portion of the first substrate, a second recessed portion formed on the second substrate so that at least one edge is opened, and the first optical film to overlap with the first optical film And a second optical film attached to the second concave portion.

In addition, in order to achieve the above object, the flat panel display device according to the present invention comprises the step of bonding the first substrate and the second substrate, and forming a recessed portion on the opposite surface of the first and second substrate facing each other; And attaching an optical film to the concave portion.

Next, an embodiment according to the present invention will be described using a liquid crystal display as an example among various flat panel display devices.

2A is a perspective view of a liquid crystal display according to an exemplary embodiment of the present invention.

As shown in FIG. 2A, a liquid crystal display according to an exemplary embodiment of the present invention has a first surface on which a thin film transistor array including a plurality of thin film transistors and pixel electrodes is formed, and a first surface having a concave portion on a second surface on the opposite side thereof. A second substrate 113 and a first substrate having a recessed portion formed on the substrate 111, a first surface facing the first surface of the first substrate, and a color filter layer and a black matrix, and a second surface opposite the first substrate. A liquid crystal layer (not shown) formed between the first and second substrates bonded to face each other, a first optical film 115 attached to a recess provided on the second surface of the first substrate, and And a second optical film 117 attached to the second surface of the second substrate.

The liquid crystal display is divided into a display unit in which the color filter layer is formed, and a non-display unit in which a light shielding layer is formed to prevent light from being transmitted.

In this case, the first and second recesses have a size of a region to which the optical film is attached, and the second optical recesses are overlapped with the first optical film and the first optical film attached to the first recess. The second optical film 117 attached to the concave portion covers a predetermined region including the display portion of the liquid crystal display device.

The first and second recesses may have a first concave portion formed to open one corner of four corners, and the second surface of the second substrate 113 may also be formed to open one corner, which is incorrectly attached. It is to be able to easily remove the optical film.

The first and second recesses may apply a photoresist onto a substrate, form a predetermined photoresist pattern through exposure and development of the photoresist, and then use the photoresist pattern as a mask, such as hydrofluoric acid (HF). An etchant may be used to etch exposed areas of the substrate.

The optical film includes a polarizing film or a retardation film.

FIG. 2B is a cross-sectional view taken along the line II-II 'of FIG. 2A.

As it can be seen in Figure 2b, the liquid crystal display according to the embodiment of the present invention is a first recessed portion formed to have a predetermined depth on the first substrate 111, and also a predetermined depth on the second substrate 113 It is provided with a second recess formed to have.

In addition, a second optical film 117 is attached to the second recess to cover the display of the liquid crystal display, and the first optical film 115 is overlapped with the second optical film 117 to the first recess. ) Is attached.

The first and second recesses may be formed to have the same depth as that of the first and second optical films 115 and 117, respectively. However, the first and second substrates 111 and 113 may be formed as necessary during the process. The liquid crystal layer formed therebetween may be formed within a depth not exposed through the recess of the substrate.

When the depths of the first and second recesses are formed to be the same as the thicknesses of the first and second optical films 115 and 117, the surface of the liquid crystal display is formed so as not to have a step as shown in FIG. 2B. .

In addition, since the first and second recesses are formed by etching the first and second substrates, and the first and second optical films are attached to the first and second recesses, respectively, the liquid crystal through the etching of the substrate. As the display device becomes lighter and the thickness of the liquid crystal display device does not increase even when the optical film is attached, it is possible to implement a slimmer liquid crystal display device.

In addition, when the reworking of the optical film is wrongly attached, the edges of the first and second recesses are opened, so that the optical film may be removed along the open edges, thereby facilitating the rework of the optical film. will be.

In addition, in FIG. 2A, the first and second recesses are formed so that the corners of the substrate are formed to have a shape of 'C' except for the recesses. It may be possible to form the shape of the '┌', or to open the corners so that the two adjacent corners of the first and second recesses, such as '└', '┘', '┐' shape. will be..

In addition, although not shown, it may be formed so that the three corners of the first and second recesses are opened so that the shape of the portion of the substrate except for the recess is 'l' and '-'.

2A and 2B, recesses are formed in both the first substrate and the second substrate, but the recesses are formed only in the second substrate having the display portion and the display portion is exposed to the outside of the flat panel display device. It may be possible to attach the optical film.

Next, another embodiment of the flat panel display device according to the present invention will be described.

Another embodiment of the flat panel display device according to the present invention is the first and second substrates bonded to each other with a predetermined gap, and the first and second formed on opposite surfaces of the first surface facing each other on the two bonded substrates, respectively. And a recess and an optical film attached to the first and second recesses, wherein the optical film is a functional film.

More specifically, in another embodiment of the flat panel display according to the present invention, the optical film is a protective film (Protective Film), an anti-glare film (AG: Anti-glare Film), an anti-reflection film (AR: Anti) By using functional films such as Reflecting Film) or Low Reflecting Film (LR), Anti Static Film (AS), Anti Glare Static Film (AGS), It will be possible to protect the image or to implement a higher quality image.

Of course, using the polarizing film as the optical film, it will be possible to further apply a functional film on the upper or lower surface of the polarizing film.

Such a flat panel display may include preparing two substrates bonded to each other with a predetermined gap, forming recesses at a predetermined depth on opposite surfaces of the first surfaces facing each other on the bonded substrates; It characterized in that it comprises the step of attaching the optical film to.

Next, a description will be given of a method of manufacturing a liquid crystal display device as an embodiment of a method of manufacturing a flat panel display device according to the present invention.

A method of manufacturing a liquid crystal display according to the present invention includes forming a thin film transistor array including a thin film transistor on a first surface of a substrate, and forming a color filter array including a color filter on a first surface of a second substrate. Forming, bonding the first and second substrates to have a predetermined gap, and forming a first recess to open at least one edge on a second surface opposite to the first surface of the first substrate. Forming a second concave in such a manner that at least one edge is opened on a second surface opposite to the first surface of the second substrate, attaching a first optical film to the first concave, And attaching the second optical film to the second concave portion.

The second substrate is divided into a display unit in which the color filter layer is formed, and a non-display unit in which a light shielding layer is formed to prevent light from being transmitted in a region other than the display unit.

The forming of the recesses on the second surfaces of the first and second substrates may include, for example, applying photoresist on the substrate, forming a predetermined photoresist pattern through exposure and development processes of the photoresist, and then It may be possible to etch and form a substrate exposed between the photoresist patterns using an etchant such as hydrofluoric acid (HF) using the photoresist pattern as a mask.

In addition, the depth of the recess is preferably equal to the thickness of the optical film in the forming of the recess, but the depth of the recess may be formed so that the liquid crystal layer is not exposed through the recess.

In addition, the concave portion may be formed so that at least one edge is opened to easily remove the attached optical film when rework occurs after attaching the optical film, but on the surface to which the optical film is attached. It will be preferable to form the recessed portion so that a step by the optical film does not occur.

In addition, in the attaching of the optical film, the second optical film is attached to a second recess formed on the second surface of the second substrate to cover the display of the second substrate, and the first optical film is It is attached to the first recessed portion formed on the second surface of the first substrate so as to overlap the second optical film.

In the attaching of the optical film, the polarizing film is generally attached to the optical film, but the protective film, the anti-glare film, the anti-reflection film or the low reflection film, the anti-static film, the anti-glare and the anti-static film which protects the substrate and It will also be possible to attach the same functional film.

In addition, the functional film may be additionally provided on the upper or lower surface of the optical film to attach the optical film.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents. Will be clear to those who have knowledge of.

In the flat panel display device including two substrates bonded at regular intervals according to the present invention, by forming a recess having a predetermined depth on the substrate of the flat panel display device, by attaching an optical film to the recess has the following effects Can be obtained.

First, by etching the substrate to form a recess, it is possible to reduce the weight of the flat panel display device as much as the substrate is etched.

Second, a step is not formed on the surface of the flat panel display by forming a recess in the substrate and attaching an optical film or a functional film to the recess.

Third, by forming a recess in the substrate and attaching the optical film or the functional film to the groove, even if the optical film or the functional film is attached, the thickness of the flat panel display device does not increase, thereby making it possible to implement a slim flat panel display device.

Fourth, the concave portion formed in the substrate is formed so that at least one edge is opened, it is possible to remove the optical film more easily.

Claims (12)

First and second substrates bonded to each other with a gap therebetween; A recess formed in an outer surface of at least one of the first substrate and the second substrate; And It includes an optical film attached to the recess, The recess is formed so that at least one corner is open, And the optical film is exposed to the outside through an open corner of the recess. delete The method of claim 1, And the optical film is attached to each of the first concave portion formed on the outer surface of the first substrate and the second concave portion formed on the outer surface of the second substrate. The method of claim 1, And the optical film is a polarizing film. The method of claim 1, And the optical film is a functional film. 5. The method of claim 4, And a functional film on the upper or lower surface of the optical film. The method according to claim 5 or 6, The functional film is a flat panel display device, characterized in that any one of the anti-reflection film, anti-glare film and anti-static film. The method of claim 1, And a liquid crystal layer is formed between the first and second substrates. Forming a thin film transistor array comprising thin film transistors on a first side of the first substrate; Forming a color filter array comprising color filters on a first side of the second substrate; Bonding the first and second substrates together; Forming a first recess on a second surface opposite to the first surface of the first substrate; Forming a second recess on a second surface opposite to the first surface of the second substrate; Attaching a first optical film to the first concave portion; And Attaching a second optical film to the second recess; Each of the first and second recesses is formed so that at least one corner is opened, And the first and second optical films are exposed to the outside through open corners of the first and second concave portions. delete The method of claim 9, Wherein each of the first and second optical films is a polarizing film or a functional film. The method of claim 11, The functional film is a flat panel display device, characterized in that any one of an anti-reflection film, anti-glare film and anti-static film.

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