KR20140017161A - Method for manufacturing display panel with curved shape and display panel with curved shape using the method - Google Patents

Abstract

The present invention relates to a manufacturing method of a curved display panel using a flat display panel and a curved display panel using the same. A manufacturing method of a curved display panel includes: a step of cutting a part of outer side to reduce the thickness of one between a first substrate and a second substrate to a predetermined thickness in a flat display panel having the first substrate, the second substrate and a liquid crystal layer which is formed in between the first and second substrates; a step of forming a distance maintenance layer by attaching a semi-solid reinforcement material to the outer side of a protection member which is manufactured to be suitable for a predetermined curve shape; a step of bending the flat display panel which has the cut outer side into a display panel which has a curved shape with a predetermined radius of curvature; and a step of adhering the flat display panel and protection member to make the outer side of the flat display panel cut into the predetermined thickness and the distance maintenance layer.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a curved display panel manufacturing method and a curved display panel using the curved display panel,

The present invention relates to a method of manufacturing a curved display panel and a curved display panel using the same, and more particularly, to a method of manufacturing a curved display panel using a flat display panel and a curved display panel using the same.

As display technology has developed, various kinds of display devices have been developed and used. Among them, there is a liquid crystal display device which implements an image by using a liquid crystal.

A liquid crystal panel of a general liquid crystal display (LCD) includes two substrates and a liquid crystal layer having a dielectric anisotropy therebetween. A desired image is obtained by applying an electric field to the liquid crystal layer and adjusting the intensity of the electric field to adjust the transmittance of light passing through the liquid crystal layer. Such liquid crystal displays are typical among portable flat panel displays (FPDs) that are easy to carry. Among them, TFT-LCDs using thin film transistors (TFTs) as switching elements are mainly used.

A plurality of display signal lines, that is, a gate line and a data line, a plurality of thin film transistors and a pixel electrode, are formed on the lower one of the two substrates of the liquid crystal panel disposed to face each other, and a color filter is disposed on the upper one of the two substrates. ) And a common electrode are formed.

Since the liquid crystal panel is usually manufactured in a flat form, when a curved display is required, a conventional flat liquid crystal panel cannot be used.

In order to solve such a problem, a flexible liquid crystal panel has been developed which can be bent when an external force is applied by employing a substrate of a flexible material instead of a glass substrate of a conventional liquid crystal panel.

However, the conventional flexible liquid crystal panel has a problem in that the manufacturing process is difficult and the manufacturing cost is high.

Therefore, there is a need for a method of manufacturing a curved display panel that is easy to manufacture and inexpensive to manufacture.

It is an object of the present invention to provide a curved display panel manufacturing method capable of manufacturing a curved display panel by attaching a flat display panel to a curved protective member so that the flat display panel is equidistantly maintained and a curved display panel using the same.

According to an aspect of the present invention, there is provided a method of manufacturing a curved display panel, including: forming a first substrate, a second substrate, and a liquid crystal layer formed between the first substrate and the second substrate, Cutting a part of the outer surface of the panel such that a thickness of at least one of the first substrate and the second substrate is reduced to a predetermined thickness; Attaching a reinforcing material in a semi-solid state to an outer surface of a protective member made to conform to a predetermined curved shape to form a gap-holding layer; Bending a flat panel display panel including the cut faced outer surface in a predetermined curved shape; And attaching the flat panel display panel and the protection member such that the outer surface of the flat display panel is bent to the predetermined thickness and the gap holding layer are in contact with each other, .

According to an aspect of the present invention, there is provided a curved display panel manufactured by the curved display panel manufacturing method.

A method of manufacturing a curved display panel according to an embodiment of the present invention and a curved display panel using the curved display panel according to an exemplary embodiment of the present invention include a curved protective member and a flat display panel .

1 and 2 are views for explaining a step of cutting a flat panel display panel in a method of manufacturing a curved display panel according to an embodiment of the present invention.
3 is a view for explaining a step of forming a gap-holding layer on a protection member in a method of manufacturing a curved display panel according to an embodiment of the present invention.
4 is a view illustrating a step of bending a flat display panel in a method of manufacturing a curved display panel according to an embodiment of the present invention.
5 is a view for explaining a step of attaching a curved display panel and a curved display panel according to an embodiment of the present invention.
6 is a perspective view illustrating a curved display panel manufactured by a method of manufacturing a curved display panel according to an embodiment of the present invention.

Hereinafter, a method of manufacturing a curved display panel according to an embodiment of the present invention will be described with reference to the accompanying drawings.

The curved display panel manufacturing method according to an embodiment of the present invention may include a method of manufacturing a curved display panel having a predetermined curved shape using a flat panel display panel.

The flat panel display panel may include an LCD panel, an organic electroluminescent panel, and the like. In the case of an LCD panel, a liquid crystal layer may exist between substrates, and in the case of an organic electroluminescent panel, an organic light emitting layer may exist between substrates.

Hereinafter, an embodiment of the present invention will be described a method of manufacturing a curved display panel using the LCD panel as a flat display panel. However, the flat display panel related to the embodiment of the present invention is not limited to the LCD panel.

1 is a view for explaining a step of cutting a flat panel display panel in a method of manufacturing a curved display panel according to an embodiment of the present invention.

Fig. 1 (a) shows a flat display panel 110. Fig. The flat panel display panel 110 is formed of glass and includes a first substrate 111 and a second substrate 112 and a liquid crystal layer 113 formed between the first substrate 111 and the second substrate 112 ). Either the first substrate 111 or the second substrate 112 may be referred to as a thin film transistor array panel and the other may be referred to as a color filter array panel.

Although not shown in the drawing, a sealing material may be disposed at the edges of the two substrates 111 and 112 to form a space filled with liquid crystal, which is made of a material for bonding the two substrates 111 and 112, It is possible to prevent the liquid crystal filled by the liquid crystal panel 20 from leaking.

A method of manufacturing a curved display panel according to an exemplary embodiment of the present invention includes cutting out a portion of an outer surface of the first substrate 111 and the second substrate 112 such that a thickness of at least one of the first substrate 111 and the second substrate 112 is reduced to a predetermined thickness .

Hereinafter, a method of cutting out a part of the outer surface of the first substrate 111 and a part of the outer surface of the second substrate 112 will be described in the following embodiments, but the present invention is not limited thereto.

At this time, the method of carving out the first substrate 111 and the second substrate 112 in the step of cutting out a part of the outer surface (FIGS. 1 (a) to (b)) may be various. For example, it may be a mechanical polishing method or an etching method using an etching solution.

When cutting out a part of the outer surface of the first substrate 111 and the second substrate 112, the uppermost and lowermost ends of the substrate can be left without being cut off. This is because a driver circuit for driving a display panel and a printed circuit board (PCB) having various circuit elements attached thereto can be connected to the top or bottom of the substrate.

Also, as shown in the figure, the first substrate 111 and the second substrate 112 can be scraped off while leaving a part of the outer surface of the first substrate 111 and the second substrate 112. The remaining portions may be spaced apart from the substrates 111 and 112 and the protective members 120 and 130, which are formed in a curved shape having a predetermined curvature.

For example, when a part of the outer surface of the first substrate 111 and the second substrate 112 is scraped off, the thickness of the side surface of the flat panel display panel 110 before the part of the outer surface is scored, The thickness of the side surface of the flat panel display panel 110 after the part of the flat panel display panel 110 is cut may be equalized.

Fig. 2 (a) is a side view when viewed from the direction A in Fig. 1 (a flat display panel 110 before a part of the outer surface is cut), Fig. 2 (b) (The flat panel display panel 110 after a part of the outer surface is cut away) from the A 'direction. As shown in the figure, the thickness of the side surface of the flat panel display panel 110 before the part of the outer surface is cut and the thickness of the side surface of the flat panel display panel 110 after the part of the outer surface are cut are the same. The side shown may be a surface having a curved shape when the flat display panel 110 is bent.

Meanwhile, according to one embodiment of the present invention, the outer side of the cut-away portion to a predetermined thickness can be divided into a plurality of spaced regions. The number of divided areas shown in Fig. 1 (b) is three. Wherein the plurality of regions are divided by unshaved portions.

In addition, the predetermined thickness may be determined in consideration of warping of the flat panel display panel 110. For example, it is possible to allow the flat display panel 110, which is partially cut off from the outer surfaces of the substrates 111 and 112, to be bent properly, and to prevent the flat display panel 110 from being bent The thickness can be determined.

The method of manufacturing a panel of a curved display according to an embodiment of the present invention may include the step of attaching a reinforcing material in a semi-solid state to a protective member made to conform to a predetermined curved shape to form a gap holding layer in the protective member.

3 is a view for explaining a step of forming a gap-holding layer on a protection member in a method of manufacturing a curved display panel according to an embodiment of the present invention.

3 (a) shows an example in which the gap-retaining layer 140 is formed on the first protection member 120, and FIG. 3 (b) shows an example in which the space-retaining layer 140 is formed on the second protection member 130 .

The protective member attached to the first substrate 111 may be referred to as a first protective member 120 and the second protective member 120 may be attached to the second substrate 112 And the protective member will be referred to as a second protective member 130. [

The first protective member 120 and the second protective member 130 are members for guiding the flat display panel 110 to maintain a curved shape having a predetermined curvature and protecting the liquid crystal layer 113.

The first protection member 120 and the second protection member 130 may be formed of a transparent or semi-transparent material such as glass, synthetic resin, or the like.

The cavity-holding layer 140 is a layer formed by adhering semi-solid reinforcing materials. In the present specification, a semi-solid state means a gel state in a state where it can be flexibly bent while maintaining its shape. Examples of semi-solid reinforcing materials are silicone sheet reinforcing materials. The semi-solid reinforcing material may be a light-transmitting material.

The gap holding layer 140 is formed on the first substrate 111 and the second substrate 112 so as to correspond to a plurality of regions (three regions in FIG. 1B) Three regions).

The gap holding layer 140 may be formed so that the thickness of the gap holding layer 140 may be set to a value larger than the thickness of the first substrate 111 and the second substrate 112 so that the gap holding layer 140 can be inserted into the cut portions of the first substrate 111 and the second substrate 112. [ The spacer layer 140 may be formed so as to be equal to the thickness of the substrate 112 (original substrate thickness - predetermined thickness).

The method of manufacturing a panel on a curved display according to an embodiment of the present invention may include bending the flat display panel 110 (Fig. 1 (b)) according to the curved shape of the protective member shown in Fig.

4 is a view illustrating a step of bending a flat display panel in a method of manufacturing a curved display panel according to an embodiment of the present invention.

The predetermined curved shape shown is a curved shape without an inflection point. However, an S-shaped curved surface or a curved surface having one or more inflection points may be used. In this case, the protective member may be manufactured in the form of a curved surface having one or more S-shaped curved surfaces and inflection points.

A method of manufacturing a panel in a curved display according to an exemplary embodiment of the present invention can display a flat display panel (FIG. 1 (b)) according to the curved shape of the protective member shown in FIG.

The method of manufacturing a curved display panel according to an embodiment of the present invention may include attaching the curled display panel 110 and the protection members 120 and 130 in a bent state.

5 is a view for explaining a step of attaching a curved display panel and a curved display panel according to an embodiment of the present invention.

4, a flat display panel 110 in a bent state is formed by a first protective member 120 (shown in Fig. 3 (a) in which a gap keeping layer 140 is formed) and a gap holding layer 140 Can be attached to the second protective member 130 (shown in Fig. 3 (b)). In this case, the gap-holding layer 140 formed on the protective members 120 and 130 may be in contact with the portions cut off from the substrates 111 and 112.

In addition, the portions of the protective members 120 and 130 where the gap holding layer 140 is not formed may be in contact with the portions of the substrates 111 and 112 where the outer surfaces are not clipped.

That is, the flat display panel 110 and the protection members 120 and 130 may be attached so that the gap-holding layer 140 is inserted into the portion where the substrates 111 and 112 are cut.

Accordingly, the gap-holding layer 140 may maintain a gap of a space corresponding to the thickness of the substrate 111 or 112. The space-maintaining layer 140 may keep the protective members 120 and 130 and the substrates 111 and 112 equally spaced. The cavity-holding layer 140 is formed by attaching the semi-solid reinforcing material to the outer surfaces of the protection members 120 and 130, thus facilitating the manufacturing process.

If the reinforcing material is a liquid state material, the liquid state material flows down, so that it is difficult to form the gap keeping layer 140 having the same thickness. When the material forming the cavity-holding layer 140 is a solid material, the space-holding layer 140 may have the same curvature as that of the protective members 120 and 130 manufactured to have a curved shape having a predetermined curvature, It is difficult to be formed.

Since the space-maintaining layer 140 maintains equal spacing between the protection members 120 and 130 and the substrates 111 and 112,

According to an embodiment of the present invention, the polarizing plate 150 may be further attached to the outer surface of the first protection member 120 and the outer surface of the second protection member 130, respectively. In the present embodiment, they are attached to the outer surfaces of the first protection member 120 and the second protection member 130, respectively.

Also, according to an embodiment of the present invention, the first protective member 120 and the second protective member 130 may be implemented as a polarizing plate.

The curved display panel can be manufactured by the method described in Figs. 1 to 5.

6 is a perspective view showing a curved display panel manufactured by the method described in Figs. 1 to 5. Fig.

The curved display panel 100 shown in FIG. 1 has a polarizing plate 150 separately from the protective members 120 and 130.

However, one embodiment of the present invention may include a curved display panel in which the first protective member 120 and the second protective member 130 are formed of a polarizing plate and a separate polarizing plate 150 is omitted.

As described above, in the curved display panel manufacturing method according to one embodiment of the present invention and the curved display panel manufactured by the manufacturing method, since the semi-solid reinforcing materials are used, the substrates 111 and 112 and the protection members 120 And 130 can be maintained. Therefore, the curved display panel manufacturing method according to the embodiment of the present invention and the curved display panel manufactured by the manufacturing method according to the embodiment of the present invention can be used for a separate display Since a member is not required, the manufacturing cost is low and the manufacturing process is simple.

In addition, according to an embodiment of the present invention, the uncut portions of the substrates 111 and 112 can maintain equal spacing between the substrates 111 and 112 and the protective members 120 and 130.

The above-described method of manufacturing a curved display panel is not limited to the configuration and the method of the above-described embodiments, but the embodiments may be modified such that all or some of the embodiments are selectively combined .

100: curved display panel
110: flat panel display panel
111: first substrate
112: second substrate
113: liquid crystal layer
120: first protection member
130: second protection member
140:
150: polarizer

Claims (6)

As a curved display panel manufacturing method,
In a flat panel display panel including a first substrate, a second substrate, and a liquid crystal layer formed between the first substrate and the second substrate, the thickness of at least one of the first substrate and the second substrate is reduced to a predetermined thickness. Shaving a portion of the outer surface as much as possible;
Attaching a reinforcing material in a semi-solid state to an outer surface of a protective member made to conform to a predetermined curved shape to form a gap-holding layer;
Bending a flat panel display panel including the cut outer surface in a curved shape having a predetermined curvature; And
And attaching the flat panel display panel and the protective member such that the outer surface cut to the predetermined thickness and the spacer layer contact each other while the flat panel display panel is bent. . The method of claim 1, wherein the semi-solid reinforcing material is
A method of manufacturing a curved display panel comprising a silicon sheet, a sheet having optically transparent properties, or a reinforcing material of a translucent material. 3. The method of claim 2,
The step of attaching the flat panel display panel and the protection member
Wherein an uncut portion of the substrate of the flat panel display panel is brought into contact with the protective member. The method according to claim 1, wherein the step of carving out a part of the outer surface
The outer surface of the flat display panel is cut so that the thickness of the side surface of the flat display panel before the part of the outer surface is cut and the thickness of the side surface of the flat display panel after the part of the outer surface is cut off,
Wherein the side surface of the flat display panel is a surface in which a curved surface shape is seen when the flat display panel is bent. The method of claim 1,
The outer surface cut to the predetermined thickness is divided into a plurality of spaced apart area,
Wherein the gap holding layer is spaced apart from the plurality of regions so as to correspond to a plurality of regions constituting the outer surface of the cut portion. The curved display panel manufactured by the curved display panel manufacturing method of any one of Claims 1-5.

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