KR101569206B1 - Curved Display Device And Method Of Fabricating The Same - Google Patents

Abstract

The present invention provides a curved display device which includes a first substrate and a second substrate which include a plurality of sub pixel regions and are separated to face each other, a liquid crystal layer which is formed between the first substrate and the second substrate, and a backlight unit which is arranged on the outer side of the first substrate. The first and second substrates have curved shapes to be bent in a first direction. The size of the sub pixel region of the first substrate is different from the size of the sub pixel region of the second substrate.

Description

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a curved display device,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a curved surface display device, and more particularly, to a curved surface display device in which color crosstalk is improved and a manufacturing method thereof.

2. Description of the Related Art In recent years, as the society has become a full-fledged information age, a display field for processing and displaying a large amount of information has been rapidly developed, and various flat panel displays (FPDs) . 2. Description of the Related Art In general, a flat panel display comprises a display panel that displays an image using an external video signal, a backlight unit that supplies light to the display panel, and a driver that drives the display panel and the backlight unit.

In recent years, a curved display device has rapidly emerged as a next-generation display device instead of a flat panel display device. The curved display device allows the user to further improve the degree of immersion and make the image more realistic, thereby making the user feel comfortable .

However, in such a curved display device, image quality degradation such as color crosstalk occurs due to compressive stress and tensile stress depending on the curved surface shape, and this will be described with reference to the drawings.

1 is a cross-sectional view of a conventional curved surface display device.

1, the conventional curved surface display device 10 includes a display panel 20 for displaying an image, a backlight unit (not shown) for supplying light from the back surface of the display panel 20, And includes first and second frames 40 and 50 surrounding and modularizing the panel 20 and the backlight unit.

The display panel 20 includes a liquid crystal layer (not shown) formed between the first and second substrates 22 and 24 and the first and second substrates 22 and 24 facing each other, A seal pattern (not shown) for holding the liquid crystal layer by attaching the first and second substrates 22 and 24 to each other is formed on the rim between the first and second substrates 22 and 24.

Each of the first and second substrates 22 and 24 has a curved surface shape that curves along the horizontal direction so as to be concave when viewed from the front surface C of the curved surface display device 10, As shown in Fig.

2A and 2B) are formed in the respective sub-pixel regions on the inner surface of the first substrate 22, and in each sub-pixel region on the inner surface of the second substrate 24 corresponding thereto, (R, G, B) color filters (CF in Figs. 2A and 2B) of blue (Figs. 2A and 2B) are formed sequentially and repeatedly.

The first frame 40 covers an outer frame of the first substrate 22 and the second frame 50 is disposed to cover an outer frame edge and a side surface of the second substrate 24.

The first and second frames 40 and 50 are coupled to each other to form and maintain a curved shape of the display panel 20.

That is, the first and second frames 40 and 50 have a curved shape with a specific curvature when viewed in cross section, and the first and second frames 40 and 50 are disposed on the first and second substrates 22 and, respectively, It is possible to form and maintain the curved surface shape of the display panel 20 by applying pressure P to the outer surfaces of the first and second substrates 22 and 24 while being in close contact with the outer surface of the display panel 20.

Therefore, the display panel 20 has a curved surface shape that is the same as that of the curved surfaces of the first and second frames 40 and 50.

In the conventional curved surface display device 10, a compressive stress CS and a tensile stress TS are respectively applied to the inner surfaces of the first and second substrates 22 and 24 by the curved surface shape, And as a result, the lengths of the inner surfaces of the first and second substrates 22 and 24 in the horizontal direction change.

That is, the compressive stress CS is generated on the inner surface of the first substrate 22, the length of the inner surface of the first substrate 22 along the horizontal direction decreases, and tensile stress TS is generated on the inner surface of the second substrate 24 The length of the inner surface of the second substrate 24 along the horizontal direction increases.

The position of the pixel electrode PE formed on the inner surface of the first substrate 22 is shifted in the horizontal direction and the position of the pixel electrode PE in the horizontal direction of the color filter CF formed on the inner surface of the second substrate 24 is shifted And this positional variation causes misalignment between the pixel electrode PE and the color filter CF, which will be described with reference to the drawings.

2A and 2B are sectional views of a display panel of a central portion A and an edge portion B of the curved surface display device of Fig. 1, respectively. Fig. 3A and Fig. 3B respectively show a central portion A of the curved surface display device of Fig. And the edge portion (B), which will be described with reference to FIG.

2A and 3A, since the influence of compressive stress and tensile stress is small in the central portion A of the display panel 20, the pixel electrode E formed on the inner surface of the first substrate 22 is formed of the The color filter CF formed on the inner surface of the substrate 24 is aligned with the color filter CF so that each sub-pixel area in the central portion A of the display panel 20 displays a normal color.

The influence of the compressive stress and the tensile stress on the edge B of the display panel 20 increases to reduce the length of the inner surface of the first substrate 22 and decrease the length of the second substrate 24 The pixel electrode E formed on the inner surface of the first substrate 22 is misaligned with the color filter CF formed on the inner surface of the second substrate 24. As a result, The color crosstalk occurs in each of the sub-pixel regions by displaying the hue of the adjacent sub-pixel region together.

In order to prevent such color crosstalk, when the seal pattern is formed on the rim between the first and second substrates 22 and 24 of the display panel 20 with a material having a relatively high elastic modulus, It is possible to prevent variations in the length of the substrates 22 and 24 in the horizontal direction but to prevent the stresses of tens of MPa from being left on the display panel 20 and to prevent deformation of the first and second substrates 22 and 24 Or damage such as breakage.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a curved surface display device in which stress is relaxed and color crosstalk due to stress is minimized by applying pressure to a side surface of a display panel to form and maintain a curved surface shape. The purpose is to provide.

According to the present invention, the frame is brought into direct contact with the side surface of the display panel to apply pressure to the display panel so that the display panel has different curvatures in directions and magnitudes for different positions, thereby providing a curved surface display in which stress relaxation is maximized and color crosstalk due to stress is minimized It is another object to provide an apparatus and a method of manufacturing the same.

In order to solve the above problems, the present invention provides a display device comprising: a display panel having a curved surface shape bent along a horizontal direction and displaying an image; A first frame having a rectangular ring shape covering a rear edge of the display panel; And a second frame coupled to the first frame and having a rectangular ring shape including a flat surface portion and a side wall portion covering the front and side surfaces of the display panel, Wherein the side wall portion is in direct contact with the horizontally facing side surface of the display panel and applies pressure to the display panel, and the display panel includes a curved surface having a curved surface shape having a curvature different in position by the pressure in the horizontal direction, A display device is provided.

The curvature of the curved shape may have a different size and direction for each position.

In addition, the curvature may be determined by the size, thickness, and material of the display panel.

The display panel has a curved surface shape concave from the central portion to the front and has a curved surface shape convex to the front from the edge portion. The rear surface of the display panel has a rear surface that is partially separated from the rear edge of the edge portion, And a front space partially separated from the front edge of the central portion of the display panel and the second frame may be formed.

The curved surface display device may further include a gate driving unit and a data driving unit connected to the edges facing each other in the vertical direction of the display panel.

The curved surface display device may further include a polarizing plate including a stretching layer sequentially formed on the entire surface of the display panel and a PET protective layer, and the stretching axis of the stretching layer may be parallel to the horizontal direction .

On the other hand, the present invention provides a method of manufacturing a display panel, comprising: placing both ends of a display panel having a first width in a horizontal direction on first and second jigs, respectively; Moving the first and second jigs such that the display panel has a second width smaller than the first width to apply pressure to both the horizontally facing sides of the display panel; Wherein the display panel includes a curved surface having a curved surface shape having a different curvature according to positions by the pressure in the horizontal direction provided from the first and second jigs, A method of manufacturing a device is provided.

The manufacturing method of the curved surface display device may further include a step of pressing the side walls of the second frame in direct contact with the opposite side surfaces of the display panel in the horizontal direction so that the display panel maintains the curved shape .

The manufacturing method of the curved surface display device may further include: measuring a curved shape of the display panel; And forming the first and second frames using the measured curved shape.

The second frame may include first and second partial frames corresponding to both ends of the display panel facing each other in the horizontal direction and third and fourth partial frames corresponding to opposite ends of the display panel in the vertical direction, Wherein the step of embedding both ends of the display panel in the first and second jigs comprises: placing the first and second partial frames on the first and second jigs, respectively; Wherein the step of attaching the first and second frames to the display panel includes placing the first and second partial frames facing the horizontally opposite ends of the display panel in the first and second partial frames, respectively, And assembling a fourth partial frame to the first and second partial frames, and combining the first frame and the assembled second frame.

The polarizing plate including a stretching layer is formed on the front surface of the display panel, and the stretching axis of the stretching layer is parallel to the horizontal direction. The method of manufacturing the curved display device is characterized in that the stretching layer is stretched in the horizontal direction And heating and humidifying the display panel including the stretch layer.

The present invention has the effect of maximizing stress relaxation and minimizing color crosstalk due to stress by applying pressure to the side surface of the display panel to form and maintain a curved surface shape.

In the present invention, the frame is brought into direct contact with the side surface of the display panel to apply pressure to the display panel so that the display panel has different curvatures in directions and magnitudes for different positions, thereby maximizing stress relaxation and minimizing color crosstalk due to stress .

1 is a sectional view of a conventional curved surface display device.
2A and 2B are cross-sectional views of a display panel of a central portion A and an edge portion B, respectively, of the curved display device of Fig.
3A and 3B are respectively photographs of the sub-pixel regions of the central portion A and the edge portion B of the curved display device of Fig. 1, respectively. Fig.
4 is an exploded perspective view of a curved display device according to a first embodiment of the present invention;
5 is a sectional view of a curved surface display device according to a first embodiment of the present invention;
6 is a plan view of a first substrate of a curved display device according to the first embodiment of the present invention.
7 is a sectional view of a first substrate of a curved display device according to a first embodiment of the present invention;
8 is a flowchart illustrating a method of manufacturing a curved display device according to a first embodiment of the present invention.
9 is a view showing a curved surface forming apparatus used for manufacturing a curved surface display device according to the first embodiment of the present invention.
10 is a flowchart illustrating a method of manufacturing a curved display device according to a second embodiment of the present invention.
11 is a flowchart illustrating a method of manufacturing a curved display device according to a third embodiment of the present invention.
12 is a view showing a curved surface forming apparatus used in manufacturing a curved surface display apparatus according to a third embodiment of the present invention.

A curved surface display device and a manufacturing method thereof according to the present invention will be described with reference to the accompanying drawings.

FIG. 4 is an exploded perspective view of a curved surface display device according to a first embodiment of the present invention, FIG. 5 is a sectional view of a curved surface display device according to a first embodiment of the present invention, FIG. 6 is a cross- 1 is a plan view of a first substrate of a curved surface display device according to the present invention.

4, 5 and 6, the curved display device 110 according to the first embodiment of the present invention includes a display panel 120 for displaying an image, a display panel 120 for displaying an image on the back surface of the display panel 120, (Not shown) for supplying light, and first and second frames 140 and 150 surrounding and modulating the display panel 120 and the backlight unit.

The display panel 120 includes first and second substrates 122 and 124 facing each other and a liquid crystal layer (not shown) formed between the first and second substrates 122 and 124, (Not shown) for preventing leakage of the liquid crystal layer while keeping the thickness (cell gap) of the liquid crystal layer and the first and second substrates 122 and 124 attached to the rim between the first and second substrates 122 and 124 Is formed.

Here, the seal pattern is made of a material having a relatively low modulus of elasticity so as to accommodate the increase and decrease of the length of the first and second substrates 122 and 124 in the curved surface direction due to the stress.

Each of the first and second substrates 122 and 124 has a curved shape curving along the horizontal direction so as to be concave when viewed from the front surface C of the curved display device 110, As shown in Fig.

Each of the first and second substrates 122 and 124 includes a plurality of sub-pixel regions SP. On the inner surface of the first substrate 122, a plurality of sub- A wiring GL and a data wiring DL are formed.

Each of the plurality of sub pixel regions SP includes a thin film transistor T connected to the gate line GL and the data line DL and a pixel electrode PE connected to the thin film transistor T and a storage capacitor Is formed.

A black matrix (not shown), red, green, blue color filters (not shown) and common electrodes (not shown) are formed on the inner surface of the second substrate 124.

When the thin film transistor T is turned on by the gate signal of the gate line GL, the data signal of the data line DL is applied to the pixel electrode PE, An electric field is generated between the pixel electrode PE of the second substrate 124 and the common electrode of the second substrate 124. [

According to the electric field generated between the common electrode of the pixel electrode PE and the common electrode of the second substrate 124, liquid crystal molecules (not shown) of the liquid crystal layer are rearranged to adjust the phase delay of the liquid crystal layer, The image is displayed by adjusting the transmittance of the liquid crystal layer.

The first and second frames 140 and 150 are formed integrally with each other. The first frame 140 has a rectangular ring shape covering an outer frame of the first substrate 122, The first substrate 122 and the second substrate 124 may have a rectangular shape including a planar portion 152 that covers the outer surface of the substrate 122 and a side wall 154 that covers the sides of the substrate 122 and 124.

The first and second frames 140 and 150 are coupled to each other to form and maintain a curved shape of the display panel 120.

That is, the opposite side wall portions 154 facing the horizontal direction of the second frame 150 directly apply pressure P to both sides of the display panel 120 facing the horizontal direction, and the second frame 150 Of the second frame 150 serve to provide the pressure P by maintaining a constant distance between the opposite side wall portions 154 in the horizontal direction of the second frame 150 .

The first frame 140 is coupled to the second frame 150 to help maintain a constant distance between the opposite side wall portions 154 in the horizontal direction of the second frame 150 .

The width of the display panel 120 in the horizontal direction is reduced by the pressure P applied to both sides of the display panel 120 in the horizontal direction so that a curved surface is formed and maintained. The width between the flat portions 152 of the second frame 150 is formed to be larger than the width between the back surface and the front surface of the display panel 120 (the thickness of the display panel 120) It is possible to have a curvature of magnitude.

A rear space RS is partially formed between the first substrate 122 and the first frame 140 and a rear space RS is partially formed between the second substrate 124 and the second frame 150. [ The front space FS and the rear space RS may correspond to the center portion A and the edge portion B of the curved display device 110, respectively.

Although not shown, the curved display device 110 may further include a third frame covering the back and sides of the backlight unit, and the third frame may be coupled with the first and second frames 140 and 150.

Curvatures different for each position of the curved surface of the display panel 120 will be described with reference to the drawings.

FIG. 7 is a cross-sectional view of a first substrate of a curved display device according to the first embodiment of the present invention, which will be described with reference to FIGS. 4, 5, and 6. FIG.

7, the first substrate 122 of the curved display device 110 according to the first embodiment of the present invention has a first width W1 between two opposite sides in the horizontal direction A pressure P is applied to both side surfaces facing each other in the horizontal direction so that the distance between both sides facing each other in the horizontal direction is reduced to a second width W2 smaller than the first width W1, The curved surface shape of the curved surface is different.

Herein, as the width of the first substrate 122 in the horizontal direction decreases, compressive stress CS and tensile stress TS are generated on the back surface and the front surface of the first substrate 120, And a frame such as a frame for forcibly determining the curvature of the first substrate 122 on the back surface, the first substrate 122 is bent so that the stress is minimized or the generated stress is relaxed to the maximum, As a result, the first substrate 122 has a different curvature for each position.

For example, the first substrate 122 may have a curved shape that is curved along the horizontal direction so as to be concave when viewed from the front of the curved display device 110 as a whole, The second region A2 having the first curvature and the second curvature having the second curvature and the third region A3 having the third curvature convex toward the front surface, The occurrence of the stress as a whole can be minimized or the relaxation of the generated stress can be maximized.

That is, a tensile stress TS is generated on the inner surface of the first substrate 122 of the first area A1, compressive stress CS is generated on the inner surface of the first substrate 122 of the second area A2, A tensile stress TS is generated on the inner surface of the first substrate 122 of the third region A3 and the tensile stress TS and the compressive stress CS are opposite to each other, The entire stress is relaxed to the maximum and occurs at a minimum.

It is also possible to form the curved surface having a different curvature for each position on the first substrate 122 due to the side pressing. This is also applicable to the second substrate 124. As a result, the first and second substrates 122 and 124, And a curved shape having different curvatures according to positions can be formed and maintained on the display panel 120 by pressing against both sides of the display panel 120. In addition,

Since the stress of the entire display panel 120 is relaxed to the maximum and is minimized, a change in length in the horizontal direction of the inner surfaces of the first and second substrates 122 and 124 is minimized, The color filters on the inner surface of the pixel electrode PE and the inner surface of the second substrate 124 are minimized in positional variation along the horizontal direction to prevent misalignment.

Therefore, the color crosstalk of the curved display device 110 is minimized.

Here, the positions of the first to third regions A1, A2, and A3 and the directions and sizes of the first to third curvatures are determined by the difference between the intrinsic factors such as the size, thickness, and material of the first substrate 122, Such as a flexible printed circuit (FPC), which is connected to the power supply 122 and the power supply.

In the above, the direction of the curvature is defined as the projecting direction of the curved surface shape. For example, the curved surface shape concave to the front surface and the curved surface shape convex to the front surface have curvatures opposite to each other.

7, the first substrate 122 has a curvature in a direction and a size different from each other in the first to third regions A1, A2, and A3. However, in another embodiment, the first substrate 122 has a curvature There may be two or more regions having the same number of regions.

A method of manufacturing such a curved display device will be described with reference to the drawings.

FIG. 8 is a flowchart illustrating a method of manufacturing a curved surface display device according to a first embodiment of the present invention, and FIG. 9 is a view illustrating a curved surface forming device used in manufacturing a curved surface display device according to the first embodiment of the present invention Referring to Fig. 4, Fig. 5 and Fig. 6, Fig.

8 and 9, a first substrate 122 including a gate line GL, a data line DL, a thin film transistor T, a pixel electrode PE, and a storage capacitor and a first substrate 122 including a black matrix, A liquid crystal layer is formed between the first and second substrates 122 and 124 to complete the display panel 120 and then the display panel 120 (Not shown).

The driving unit may include a gate driver (not shown) for supplying a gate signal to the gate line GL and a data driver (not shown) for supplying a data signal to the data line DL. The gate driver and the data driver may be attached to both sides of the display panel 120 facing each other in the vertical direction so as not to interfere with side pressure.

Then, the display panel 120 is brought into the curved surface forming apparatus 180.

The curved surface forming apparatus 180 includes first and second jigs 182 and 184 which are opposed to and spaced apart from each other so that the first and second jigs 182 and 184 are spaced apart from each other in the horizontal direction Can move along.

The first and second jigs 182 and 184 may have a "C" -shaped cross section having a horizontal portion and a vertical portion, respectively. In another embodiment, the first and second jigs 182 and 184 may have &Quot; C "shaped cross-section.

Both end portions of the display panel 120 having the first width W1 facing in the horizontal direction are positioned in the first and second jigs 182 and 184 of the curved surface forming apparatus 180, The front edge is in contact with the horizontal portions of the first and second jigs 182 and 184 and both side surfaces of the display panel 120 are in contact with the vertical portions of the first and second jigs 182 and 184.

Thereafter, the first and second jigs 182 and 184 move along the horizontal direction to reduce the interval therebetween, and apply pressure P to both sides of the display panel 120 (st10).

At this time, the first and second jigs 182 and 184 may be formed to rotate in accordance with the angular variation of both ends of the display panel 120 which is bent.

The first pressure P is applied to the back surface of the display panel 120 by using the rotation of the first and second jigs 182 and 184 so that the display panel 120 has a curved surface shape concave on the front surface. In another embodiment, the first pressure P may be directed to the rear surface of the display panel 120 by using a third jig that pushes the front center portion of the display panel 120 toward the rear side.

Thereafter, the first and second jigs 182 and 184 are brought close to the predetermined interval to make the display panel 120 have the second width W2, so that the curved surface shape having a different curvature for each position on the display panel 120 (St20).

Thereafter, the first and second frames 140 and 150 are coupled to the display panel 120 having the curved surface shape (st30), and both side wall portions 154 facing in the horizontal direction of the second frame 150 are displayed It should be in direct contact with the opposite sides of the panel in the horizontal direction.

At this time, a third frame surrounding the backlight unit may be further coupled to the first and second frames 140 and 150.

Thereafter, the first and second frames 140 and 150 apply pressure P to both sides of the display panel 120 (st40) and the display panel 120 continues to maintain the curved shape (st50) The curved surface display device 110 is completed.

In another embodiment, the polarizing plate is formed on the outer surface of the second substrate 124, which is the front surface of the display panel 120, and the curved surface forming device 180 can perform the heating and humidifying process together with the curved surface forming process.

That is, by providing a polarizing plate including a stretched layer on the outer surface of the second substrate 124 and providing a specific temperature and specific humidity to the stretching layer of the polarizing plate through the curved surface forming device 180, .

For example, the polarizing plate may be formed so that the stretching axis of the stretching layer is parallel to the horizontal direction, and the stretching layer may be contracted in the horizontal direction in the stretching axis direction through the heating and humidifying step. It is possible to provide a compressive stress on the entire surface.

The compressive stress of such a stretched layer suppresses the restoring force of the display panel 120 to the plane and can help maintain the curved surface shape of the curved surface display device 110.

In another embodiment, the polarizing plate is formed on the outer surface of the second substrate 124, which is the front surface of the display panel 120, and the curved surface forming process and the heating and humidifying process are performed in the curved surface forming device 180, A protective layer made of PET (polyethylene terephthalate) can be formed.

Here, the restoring force to the plane of the display panel 120 is suppressed by the compressive stress generated in the stretching layer, and the heat and moisture penetrating into the stretching layer of the polarizing plate are blocked by the protective layer and the compressive stress of the stretching layer is maintained .

In the first embodiment, the display panel 120 is fixed by side pressure in a state of having spaced spaces RS and FS between the front and rear surfaces of the display panel 120 and the first and second frames 140 and 150 However, in another embodiment, it is possible to improve the durability of the curved surface display device by measuring the different curvatures according to the positions and using the same in the formation of the first and second frames. .

10 is a flowchart illustrating a method of manufacturing a curved display device according to a second embodiment of the present invention. The same components as those in the first embodiment are denoted by the same reference numerals, and descriptions of the same steps as those of the first embodiment Is omitted.

10, after the first and second substrates 122 and 124 are bonded together and a liquid crystal layer is formed between the first and second substrates 122 and 124 to complete the display panel 120, The display panel 120 is brought into the curved surface forming apparatus 180.

The curved surface forming apparatus 180 includes first and second jigs 182 and 184 which are opposed to and spaced apart from each other so that the first and second jigs 182 and 184 are spaced apart from each other in the horizontal direction Can move along.

Both end portions of the display panel 120 having the first width W1 facing in the horizontal direction are positioned in the first and second jigs 182 and 184 of the curved surface forming apparatus 180, The front edge is in contact with the horizontal portions of the first and second jigs 182 and 184 and both side surfaces of the display panel 120 are in contact with the vertical portions of the first and second jigs 182 and 184.

Thereafter, the first and second jigs 182 and 184 move along the horizontal direction so as to decrease the interval therebetween, and apply pressure P to both sides of the display panel 120 (ST110).

Thereafter, the first and second jigs 182 and 184 are brought close to the predetermined interval to make the display panel 120 have the second width W2, so that the curved surface shape having a different curvature for each position on the display panel 120 (St120).

Thereafter, the curved surface shape of the display panel 120 is measured using a curved surface measuring apparatus (not shown) (st130).

The direction and size of the curvature of each display panel 120 may be determined by a design element such as a specific element such as the size, thickness, and material of the display panel 120, and a mounting position of a driving part connected to the display panel 120 When the manufacturing process of the curved display device 110 is stabilized, the curvature of each display panel 120 can be stabilized to a value within an allowable error range.

When the curved surface of the display panel 120 is measured using the curved surface measuring apparatus, the measured curvatures of the display panel 120 are measured by the first and second curved surfaces, The first and second frames having the same curvatures as those of the curved surface of the display panel 120 can be formed by using the first and second frames 140 and 150 in the formation.

Thereafter, the first and second frames 140 and 150 are coupled to the display panel 120 having the curved surface shape (st130), and both side wall portions 154, which face the horizontal direction of the second frame 150, It should be in direct contact with the opposite sides of the panel in the horizontal direction.

Since the first and second frames 140 and 150 have different curvatures and different curvatures according to the positions of the display panel 120, the rear frame of the display panel 120 and the first frame 140 are spaced apart from each other And the front edge of the display panel 120 and the flat portion of the second frame 150 are brought into close contact with each other without a space, so that the durability of the curved display device 110 can be improved.

In this case as well, the first and second frames 140 and 150 do not play a role of forcing the curvature by providing pressure on the back and front surfaces of the display panel 120, and merely serve to support the display panel 120 .

The formation of the first and second frames 140 and 150 using the measurement of the curved surface shape of the display panel 120 and the measured curved surface shape can be performed in a state where the manufacturing process of the curved display device 110 And may be performed each time the manufacturing process of the curved display device 110 is changed.

Thereafter, the first and second frames 140 and 150 apply pressure P to both sides of the display panel 120 (st150) and the display panel 120 continues to maintain the curved shape (st160) The curved surface display device 110 is completed.

In the first and second embodiments, the curved surface display device 110 is manufactured using the integrated second frame 150. However, in another embodiment, the curved surface display device is manufactured using the second frame, which is an assembled type, Which will be described with reference to the drawings.

FIG. 11 is a flowchart illustrating a method of manufacturing a curved surface display device according to a third embodiment of the present invention, and FIG. 12 illustrates a curved surface forming device used in manufacturing a curved surface display device according to a third embodiment of the present invention In the drawing, the same components as those of the first and second embodiments are denoted by the same reference numerals, and the description of the same processes as those of the first and second embodiments is omitted.

11 and 12, the first and second substrates 122 and 124 are bonded together and a liquid crystal layer is formed between the first and second substrates 122 and 124 to form the display panel 120 After completion, the display panel 120 is brought into the curved surface forming apparatus 180.

The curved surface forming apparatus 180 includes first and second jigs 182 and 184 which are opposed to and spaced apart from each other so that the first and second jigs 182 and 184 are spaced apart from each other in the horizontal direction Can move along.

Here, the second frame (not shown) includes first and second partial frames 252 and 254 corresponding to both ends of the display panel 120 facing each other in the horizontal direction and having a planar portion and a side wall portion, And second and fourth partial frames (not shown) each having a flat portion and a side wall portion, the first and second partial frames being combined with each other to complete an assembled second frame can do.

The first and second partial frames 252 and 254 are respectively placed in the first and second jigs 182 and 184 of the curved surface forming apparatus 180 and the display panel having the first width W1 120 are positioned in the first and second partial frames 252 and 254 so that the front edge of the display panel 120 faces the first and second partial frames 252 and 254 Both side surfaces of the display panel 120 come into direct contact with the side wall portions of the first and second partial frames 252 and 254 in contact with the flat surface portion.

The first and second jigs 182 and 184 on which the first and second partial frames 252 and 254 are placed move along the horizontal direction so as to reduce the interval therebetween and are moved to both sides of the display panel 120 The pressure P is applied (st220).

The first and second jigs 182 and 184 on which the first and second partial frames 252 and 254 are placed are brought close to a predetermined interval so that the display panel 120 has the second width W2 , And forms a curved surface shape having a different curvature for each position on the display panel 120 (st230).

Then, the third and fourth partial frames are assembled to the first and second partial frames 252 and 254 (st240), and the first frame 140 and the assembled second frame are combined.

The first and second partial frames 252 and 254 are brought into close contact with the display panel 120 when the curved surface shape is formed in the curved surface forming apparatus 180 so that both sides of the second frame and the display panel 120 The curved surface shape of the display panel 120 formed in the curved surface forming apparatus 180 can be maintained without being deformed.

Here, the third and fourth partial frames are assembled in a state in which the first and second partial frames 252 and 254 are positioned in the first and second jigs 182 and 184, or the first and second partial frames 252 and 254 And 254 and the display panel 120 can be assembled after being taken out of the curved surface forming apparatus 180. [

The first frame 140 includes first through fourth partial frames assembled with the first through fourth partial frames assembled with the first and second jigs 182 and 184 in a state where the first and second partial frames are assembled with the first and second jigs 182 and 184, 120 can be assembled after being taken out of the curved surface forming apparatus 180. [

Also, the first frame 140 can be formed in an assembled shape.

Thereafter, the first and second frames 140 and 150 apply pressure P to both sides of the display panel 120 (st250), and the display panel 120 continuously maintains the curved shape (st260) The curved surface display device 110 is completed.

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 invention as defined in the appended claims. It can be understood that

110: Surface display device 120: Display panel
122: first substrate 124: second substrate
140: first frame 150: second frame
CS: Compressive stress TS: Tensile stress

Claims (11)

delete delete delete delete delete delete Placing both ends of a display panel having a first width in the horizontal direction on the first and second jigs, respectively;
Moving the first and second jigs such that the display panel has a second width smaller than the first width to apply pressure to both the horizontally facing sides of the display panel;
Coupling the first and second frames to the display panel
Lt; / RTI >
Wherein the display panel has a curved surface shape having different curvatures according to positions by the pressure in the horizontal direction provided from the first and second jigs.
8. The method of claim 7,
Further comprising the step of bringing the sidewalls of the second frame into direct contact with the opposite side surfaces of the display panel facing each other in the horizontal direction so as to maintain the curved surface shape of the display panel.
8. The method of claim 7,
Measuring a curved shape of the display panel;
Forming the first and second frames using the measured curved shape;
The method comprising the steps of:
8. The method of claim 7,
Wherein the second frame includes first and second partial frames corresponding to both ends of the display panel facing each other in the horizontal direction and third and fourth partial frames corresponding to opposite ends of the display panel in the vertical direction, / RTI >
Wherein the step of embedding both ends of the display panel on the first and second jigs comprises: placing the first and second partial frames on the first and second jigs, respectively; Facing the first and second partial frames, respectively,
Wherein combining the first and second frames with the display panel further comprises assembling the third and fourth partial frames to the first and second partial frames, And joining the frame to each other.
8. The method of claim 7,
A polarizing plate including a stretching layer is formed on a front surface of the display panel,
A stretching axis of the stretching layer is parallel to the horizontal direction,
And heating and humidifying the display panel including the stretch layer so that the stretch layer shrinks in the horizontal direction.

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