KR20170064129A - Display Device and Method of Manufacturing the same - Google Patents

Abstract

The present invention provides a display device capable of improving the production yield and lifetime of a display panel in addition to the implementation of a display panel of Narrow Bezel by reducing the adhesion area while improving the adhesive strength. To this end, according to the present invention, a planarizing layer having depressed portions on an inclined region is formed on a lower substrate, an adhesive member is formed on the planarizing layer, and a lower substrate and an upper substrate are adhered to each other using an adhesive member.

Description

DISPLAY DEVICE AND METHOD FOR MANUFACTURING THE SAME

The present invention relates to a display device and a method of manufacturing the same.

As the information technology is developed, the market of display devices, which is a connection medium between users and information, is getting larger. Accordingly, a flat panel display (FPD) such as a liquid crystal display (LCD), an organic light emitting diode (OLED) display and a plasma liquid crystal display (PDP) ) Have been increasing.

The above-described display apparatus includes a display panel including sub-pixels, a driver for outputting a drive signal for driving the display panel, and a power supply for generating power to be supplied to the display panel or the driver.

The display panel includes a lower substrate for forming subpixels, an upper substrate for protecting the subpixels together with the lower substrate, and an adhesive member for cohesively sealing the lower substrate and the upper substrate.

In order to jointly seal the lower substrate and the upper substrate, an adhesive member must be formed on one surface of the two substrates. The width of the adhesive member is a factor for determining the bonding area and also influences the size (or width) of the bezel area (or non-display area).

In the past, various methods for reducing the adhesive force or the adhesive area of the adhesive member to reduce the size of the bezel area of the display panel have been proposed. However, the method proposed in the prior art is insufficient for realizing a narrow bezel, and its improvement is required.

In order to solve the above problems, the present invention provides a display device capable of improving the production yield and lifetime of a display panel in addition to the display panel of Narrow Bezel, .

According to an aspect of the present invention, there is provided a display device including a lower substrate, a planarization layer, a depression, an adhesive member and an upper substrate. The lower substrate has a display area including subpixels and a non-display area. The planarization layer is located on the non-display area of the lower substrate. The depressions are recessed from the planarization layer toward the lower substrate. The adhesive member is located on the depression. The upper substrate is bonded to the lower substrate by an adhesive member. The depressions include inclined regions.

The depressed portion includes an outer portion adjacent to the outer periphery of the lower substrate, an inner portion adjacent to the display region, an inclined portion connecting the outer portion and the inner portion, and a bottom portion having a flat surface like the lower substrate. And an inclined portion.

The outer side, medial side, and sloped portion may take the form of a triangle, a saw tooth, a hemisphere, a polygon, or a non-linear shape on a plane.

The inclined region may be symmetrical with respect to the bottom portion.

The bottom may expose underlying layers present in the lower portion of the planarization layer.

In another aspect, the present invention provides a method of manufacturing a display device. A method of manufacturing a display device includes defining a display region and a non-display region on a lower substrate, forming a planarization layer on a display region and a non-display region of the lower substrate, forming a slit pattern portion and a non- Aligning the mask having the recessed portions and patterning the planarization layer so as to form depressed depressions in the direction from the planarization layer toward the lower substrate, forming an adhesive member on the depressions, and preparing an upper substrate on the lower substrate, And joining the lower substrate and the upper substrate using the recesses, wherein the depressions include inclined regions. The non-slit pattern portion is provided in a closed curve shape surrounding the display region, and the slit pattern portion is provided so as to protrude to the outside of the non-slit pattern portion.

The present invention has the effect of reducing the size of the bezel area of the display panel and improving the narrow bezel by reducing the bonding area while improving the adhesive strength. In addition, the present invention has the effect of reducing the separation distance between the substrates constituting the display panel, lowering the moisture permeability, preventing the adhesive member from flowing or overflowing, and improving the production yield and lifetime of the display panel.

1 is a block diagram schematically showing a liquid crystal display device.
Fig. 2 is a schematic view showing the subpixel shown in Fig. 1. Fig.
3 is a perspective view schematically showing a liquid crystal panel;
4 is a sectional view of a liquid crystal panel;
5 to 8 are cross-sectional views for explaining the problems of the joint seal method proposed in the related art.
9 is a plan view showing a design model of a sealing region according to the first embodiment of the present invention.
10 is a cross-sectional view illustrating a sealing region of a liquid crystal panel according to the first embodiment of the present invention.
11 is a cross-sectional view for explaining the difference in adhesion area between the experimental example and the first embodiment.
12 is a schematic view of a mask for forming a depression according to the first embodiment of the present invention;
13 is a plan view showing a depression according to the first embodiment of the present invention.
14 is a plan view showing a depression according to a second embodiment of the present invention.
15 is a plan view showing a depression according to a third embodiment of the present invention.
16 is a plan view showing a depression according to a fourth embodiment of the present invention;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The display device according to the present invention is implemented as a television, a set-top box, a navigation device, a video player, a Blu-ray player, a personal computer (PC), a home theater and a mobile phone.

The display panel of the display device may be selected from a liquid crystal display panel, an organic light emitting display panel, a quantum dot display device, an electrophoretic display panel, a plasma display panel, and the like, but is not limited thereto. Hereinafter, a liquid crystal display device will be described as an example for convenience of explanation.

FIG. 3 is a perspective view schematically showing a liquid crystal panel, and FIG. 4 is a cross-sectional view schematically illustrating a liquid crystal panel according to an embodiment of the present invention. FIG. Sectional view.

1 to 3, a liquid crystal display includes a timing controller 130, a gate driver 140, a data driver 150, a liquid crystal panel 160, and a backlight unit 170.

The timing controller 130 receives timing signals such as a vertical synchronization signal, a horizontal synchronization signal, a data enable signal, and a clock signal from the outside. The timing controller 130 controls the operation timings of the data driver 150 and the gate driver 140 using timing signals such as a vertical synchronization signal, a horizontal synchronization signal, a data enable signal, and a clock signal.

The timing controller 130 can determine the frame period by counting the data enable signal of one horizontal period, so that the vertical synchronizing signal and the horizontal synchronizing signal supplied from the outside can be omitted. The control signals generated by the timing controller 130 include a gate timing control signal GDC for controlling the operation timing of the gate driver 140 and a data timing control signal DDC for controlling the operation timing of the data driver 150. [ ) May be included.

The gate driver 140 outputs a gate signal while shifting the level of the gate voltage in response to the gate timing control signal GDC supplied from the timing controller 130. The gate driver 140 supplies a gate signal to the liquid crystal panel 160 through the gate lines GL. The gate driver 140 may be formed in the form of an IC or a gate in panel in the liquid crystal panel 160.

The data driver 150 samples and latches the data signal DATA in response to the data timing control signal DDC supplied from the timing controller 130 and converts the digital data signal into an analog data voltage and outputs the same . The data driver 150 supplies a data voltage to the liquid crystal panel 160 through the data lines DL. The data driver 150 is formed in an IC form.

The liquid crystal panel 160 displays an image corresponding to the gate signal supplied from the gate driver 140 and the data voltage supplied from the data driver 150. The liquid crystal panel 160 includes subpixels SP for controlling light provided through the backlight unit 170. [

One sub-pixel includes a switching transistor TFT, a storage capacitor Cst, and a liquid crystal layer Clc. The gate electrode of the switching transistor TFT is connected to the gate line GL1 and the source electrode thereof is connected to the data line DL1. One end of the storage capacitor Cst is connected to the drain electrode of the switching transistor TFT and the other end is connected to the common voltage line Vcom. The liquid crystal layer Clc is formed between the pixel electrode 1 connected to the drain electrode of the switching transistor TFT and the common electrode 2 connected to the common voltage line Vcom.

The liquid crystal panel 160 includes a lower substrate SUB1 on which thin film transistors and the like are formed, an upper substrate SUB2 on which color filters and the like are formed, and a liquid crystal layer interposed therebetween. A lower polarizer 181 is attached to the lower surface of the lower substrate SUB1 and an upper polarizer 185 is attached to the upper surface of the upper substrate SUB2.

The liquid crystal panel 160 is implemented in a TN (Twisted Nematic) mode, VA (Vertical Alignment) mode, IPS (In Plane Switching) mode, FFS (Fringe Field Switching) mode or ECB (Electrically Controlled Birefringence) mode.

The backlight unit 170 provides light to the liquid crystal panel 160. The backlight unit 170 includes a light emitting diode (hereinafter, LED), an LED driver for driving the LED, a light guide plate for converting light emitted from the LED into a surface light source, and optical sheets for condensing and diffusing light emitted from the light guide plate .

The liquid crystal panel 160 includes a lower substrate SUB1 for forming a display area AA including subpixels SP, an upper substrate SUB2 for protecting the display area AA together with a lower substrate SUB1, And an adhesion member SEA for sealingly bonding the lower substrate SUB1 and the upper substrate SUB2.

The lower substrate SUB1 and the upper substrate SUB2 may be made of glass or plastic. The adhesive member SEA is formed in the non-display area NA (or bezel area) located outside the display area AA.

In order to jointly seal the lower substrate SUB1 and the upper substrate SUB2, an adhesive member SEA must be formed on one surface of the two substrates. The width of the adhesive member SEA becomes a factor for determining the bonding area and also influences the size (or width) of the non-display area (or the bezel area).

Hereinafter, the problems of the conventionally proposed method will be discussed.

5 to 8 are cross-sectional views for explaining the problems of the joint seal method proposed in the related art.

The structure shown in FIG. 5 forms a rectangular protrusion PRO1 in the sealing region of the lower substrate SUB1 and the upper substrate SUB2 in order to improve the adhesive force while lowering the moisture permeability. However, in the structure of FIG. 5, it is necessary to form a quadrangular protrusion PRO1 in the sealing region of the lower substrate SUB1 and the upper substrate SUB2, respectively, which causes an increase in the number of process steps.

The structure shown in Fig. 6 forms circular protrusions PRO2 in the sealing region of the lower substrate SUB1 to improve the adhesive force while lowering the moisture permeability. However, the structure of Fig. 6 causes a wider area occupied by the circular protrusions PRO2, resulting in an increase of the bezel area.

The structure shown in FIG. 7 forms rectangular protrusions PRO3 in the sealing region of the lower substrate SUB1 to improve the adhesive force while lowering the moisture permeability. However, the structure of Fig. 7 also widens the occupation of the quadrangular protrusions PRO3, resulting in an increase of the bezel area.

In the structure shown in Fig. 8, a quadrangular groove HM is formed in the sealing region of the lower substrate SUB1 in order to improve the adhesive force while reducing the bonding area. However, the structure of FIG. 8 is not easy to form the grooves HM in the lower substrate SUB1, and is subject to the constraints of applicable structures.

Conventionally, various methods have been proposed for reducing the adhesive force and the adhesive area of the adhesive member (SEA) in order to reduce the size of the bezel area of the liquid crystal panel. However, the conventional method is insufficient to implement Narrow Bezel. In addition, the conventionally proposed method has a problem that a dam (dam) or a partition wall is to be additionally formed to prevent the problem that the adhesive member SEA flows or overflows to the sealing region or the adjacent region, .

≪ Embodiment 1 >

10 is a cross-sectional view illustrating a sealing region of a liquid crystal panel according to a first embodiment of the present invention, and FIG. 11 is a cross-sectional view illustrating a sealing region of a sealing region according to the first embodiment of the present invention. FIG. 12 is a mask design diagram for forming a depression according to the first embodiment of the present invention, and FIG. 13 is a cross-sectional view of a mask according to the first embodiment of the present invention. Fig.

As shown in FIG. 9, a sealing region SL is defined on the lower substrate SUB1. The sealing region SL means a region where the adhesive member is coated or formed. The sealing region SL may be defined not only on the lower substrate SUB1 but also on the upper substrate. The sealing area SL may have the same line width SLx in the first direction (horizontal direction) and the line width SLy in the second direction (vertical direction), but a certain area (e.g., edge area) .

The sealing region SL is formed in a rectangular shape in the non-display region NA located outside the display region AA. The sealing region SL may have an oblique shape corresponding to a corner region of the display region AA as shown in the figure, but may be formed in various shapes such as a round shape. The sealing region SL is formed by a planarization layer as follows.

As shown in Fig. 10, a gate metal layer GAT is formed on the non-display area NA of the lower substrate SUB1. The gate metal layer GAT may be formed of a material selected from metal materials such as molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni) and copper Alloy, and may be composed of a single layer or multiple layers.

The gate metal layer GAT positioned on the non-display area NA is a wiring for transmitting (or supplying) a signal or a power source such as a gate line, a signal line, or a power supply line. The gate metal layer GAT is formed not only in the non-display area NA but also in the display area (not shown). The gate metal layer formed in the display region (not shown) becomes the gate electrode of the transistor, the lower electrode of the capacitor, and the like.

An insulating layer GI covering the gate metal layer GAT is formed on the non-display area NA of the lower substrate SUB1. The insulating layer GI may be a single layer or multiple layers of a silicon oxide film (SiOx) or a silicon nitride film (SiNx). The insulating layer GI may be defined as a gate insulating layer insulating the gate metal layer GAT.

A planarizing layer (PAC) covering the insulating layer GI is formed on the non-display area NA of the lower substrate SUB1. The planarization layer (PAC) may be made of an organic material such as photo-acryl. The planarization layer (PAC) has a thicker thickness than the insulating layer (GI).

The planarization layer PAC is formed not only in the non-display area NA but also in the display area (not shown). The planarization layer PAC formed in the non-display area NA and the display area (not shown) serves to planarize a surface covering a transistor array (a lower structure including transistors, capacitors, signal lines, and the like).

A depression (PACO) having an inclined region is formed in the planarization layer (PAC) located on the non-display area (NA). The width of the depression PACO corresponds to the width of the sealing region. The depression PACO is an area where a part of the planarization layer PAC is removed so as to be recessed in the direction of the lower substrate SUB1 or the insulating layer GI.

The depressed portion PACO has an outer portion PACO1, a medial portion PACO2, an inclined portion PACO3, and a bottom portion PAC04.

The outer portion PACO1 of the depression PACO is a portion adjacent to the outer periphery of the lower substrate SUB1. The outer portion PACO1 of the depression PACO corresponds to the surface height of the planarization layer PAC.

The inner portion PACO2 of the depression PACO is a portion adjacent to the display region. The inner side PACO2 of the depression PACO has a lower height than the outer side PACO1 of the depression PACO.

The sloped portion PACO3 of the depression PACO connects the outer portion PACO1 of the depression PACO and the inner portion PACO2 of the depression PACO. The inclined portion PACO3 of the depression PACO is a main constituent that defines the angle of the inclined region a.

The inclined region a of the depression PACO is defined by the lateral portion PACO1, the medial portion PACO2, and the inclined portion PACO3. The angle of the inclined region (a) can be changed corresponding to the size of the sealing region to be implemented. The longer the inclined portion PACO3 of the depression PACO becomes, the more gradually the angle of the inclined region a becomes. On the other hand, the longer the angle of the inclined region a is, the shorter the length of the inclined portion PACO3 of the depression PACO is.

The bottom portion PACO4 of the depression PACO is a portion having a flat surface like the lower substrate SUB1 or the planarization layer PAC. The bottom portion PACO4 of the depression PACO is formed in such a manner that the insulating layer GI (lower layer) existing under the planarization layer PAC is exposed or not exposed depending on the angle and the length of the inclined region a . That is, the bottom portion PACO4 of the depression PACO may be removed to a region adjacent to the insulating layer GI without exposing the insulating layer GI.

An adhesion member (SEA) is formed on the depression PACO. The adhesive member SEA may be made of an organic material including an acrylic-based, silicone-based, urethane-based, or epoxy-based sealant, or an inorganic material including a frit.

As shown in FIG. 11A, the structure of the experimental example in which the adhesive member SEA is formed on the planarization layer PAC can improve the adhesive strength only by increasing the sealing area SL. On the other hand, in the structure of the first embodiment in which the adhesive member SEA is formed on the depression PACO of the planarization layer PAC as shown in FIG. 11 (b), the size of the sealing region SL is smaller The adhesive strength can be improved.

As a result of the evaluation, in the first embodiment, since the substrates are bonded and sealed using the depression (PACO) of the planarization layer (PAC), the line width of the corner area + the contact area is increased, It is possible to reduce the size of the sealing region SL while having an adhesive force. The first embodiment can reduce the size of the bezel area of the display panel to realize Narrow Bezel.

In the first embodiment, the depression (PACO) of the flattening layer (PAC) also serves as a dam, and thus the problem that the adhesive member SEA flows or overflows to the outside of the sealing area SL or the adjacent area . The first embodiment can improve the production yield and lifetime of the display panel.

On the other hand, the structure of the experimental example in which the adhesion member SEA is formed on the planarization layer PAC and the structure of the first embodiment in which the adhesion member SEA is formed on the depression PACO of the planarization layer PAC, The reason for the difference is as follows. Hereinafter, the planarizing layer (PAC) will be described as having a negative-type organic photosensitive material (an organic material in which a light-receiving portion remains in exposure) as an example.

10, 12 and 13, depressions PACO formed on the planarization layer PAC are formed by using a mask MSK having a slit pattern portion SPTN and a non-slit pattern portion NPTN And is formed by a patterning process (photolithography process).

The mask MSK is designed so that the transmittance of the region corresponding to the slit pattern portion SPTN and the non-slit pattern portion NPTN is 0% and the transmittance of the remaining region is 100%. However, when the planarizing layer (PAC) has a positive-type organic photoresist material other than a negative-type organic photoresist material, the transmittance thereof is reversed.

The slit pattern portion SPTN can be realized by forming a slit shape in the mask MSK or applying a halftone shape and a slit shape together. The slit pattern portion SPTN is a portion forming the outer side portion PACO1, the inner side portion PACO2 and the inclined portion PACO3 of the depressed portion PACO and the non-slit pattern portion NPTN is the portion forming the depression PACO (PACO4).

The non-slit pattern portion NPTN is provided in the form of a closed curve surrounding the display region in a linear or quadrangular shape along the sealing region SL of the non-display region NA. The slit pattern portion SPTN is provided so as to protrude outside (in the lateral direction or in the minor axis direction) of the non-slit pattern portion NPTN. The shape of the slit pattern portion SPTN is selected from one or a combination of the shapes described below.

12 and 13, when the mask MSK is aligned on the lower substrate SUB1 on which the planarization layer PAC is formed and the patterning process is performed, the outer portion PACO1 of the depression PACO, (PACO2) and the inclined portion (PACO3) are patterned in a triangular shape. The triangular shape is laterally symmetrical (or non-symmetric) with respect to the bottom portion (PACO4) of the depression PACO.

In the region defining the sealing line SL of the planarization layer PAC, triangular wrinkles (triangular concave and convex) are formed by the outer portion PACO1, the inner portion PACO2, and the inclined portion PACO3 of the depression PACO . This crease appears on a plane, providing a region that can further improve the contact area over a flat surface.

With this structure, the first embodiment can improve the adhesive force even if the size of the sealing region SL is reduced compared with the experimental example. As a result of the comparison in FIG. 11 and the structure in FIG. 13 indicate, the structure of the first embodiment can reduce the bonding area while improving the adhesive force. Since the adhesion member SEA is formed on the planarization layer PAC, the separation distance between the upper surface of the lower substrate SUB1 and the upper surface of the upper substrate SUB2 can be reduced, and the moisture permeability can also be lowered.

Hereinafter, other embodiments of the present invention will be described. However, in order to avoid repetition of the description, the distinguishing features of the first embodiment of the present invention will be mainly described below.

≪ Embodiment 2 >

14 is a plan view showing a depression according to a second embodiment of the present invention.

As shown in Figs. 12 and 14, the outer side PACO1, the inner side PACO2 and the inclined portion PACO3 of the depression PACO have a sawtooth shape. The sawtooth shape is laterally symmetrical (or non-symmetric) with respect to the bottom portion (PACO4) of the depressed portion (PACO).

In the region defining the sealing line SL of the flattening layer PAC, serrated wrinkles (sawtooth-like irregularities) of sawtooth shape are formed by the outer portion PACO1, the inner portion PACO2 and the inclined portion PACO3 of the depressed portion PACO. Is formed. This crease appears on a plane, providing a region that can further improve the contact area over a flat surface.

With this structure, the second embodiment can also improve the adhesive force even if the size of the sealing region SL is reduced compared with the experimental example. As a result of the comparison in FIG. 11 and the structure in FIG. 14 indicate, the structure of the second embodiment can also reduce the bonding area while improving the adhesive strength. Since the adhesion member SEA is formed on the planarization layer PAC, the separation distance between the upper surface of the lower substrate SUB1 and the upper surface of the upper substrate SUB2 can be reduced, and the moisture permeability can also be lowered.

≪ Third Embodiment >

15 is a plan view showing a depression according to a third embodiment of the present invention.

12 and 15, the outer portion PACO1, the inner portion PACO2, and the inclined portion PACO3 of the depression PACO are formed in a hemispherical shape. The hemispherical shape is laterally symmetrical (or non-symmetric) with respect to the bottom portion (PACO4) of the depression PACO.

The hemispherical wrinkles (hemispherical concave and convex) of the hemispherical shape are formed by the outer portion PACO1, the inner portion PACO2 and the inclined portion PACO3 of the depression PACO in the region defining the sealing line SL of the flattening layer PAC . This crease appears on a plane, providing a region that can further improve the contact area over a flat surface.

With this structure, the third embodiment can also improve the adhesive force even if the sealing area SL is reduced in comparison with the experimental example. As the result of the comparison in Fig. 11 and the structure in Fig. 15 indicate, the structure of the third embodiment can also reduce the bonding area while improving the adhesive strength. Since the adhesion member SEA is formed on the planarization layer PAC, the separation distance between the upper surface of the lower substrate SUB1 and the upper surface of the upper substrate SUB2 can be reduced, and the moisture permeability can also be lowered.

<Fourth Embodiment>

16 is a plan view showing a depression according to a fourth embodiment of the present invention.

As shown in Figs. 12 and 16, the outer portion PACO1, the inner portion PACO2, and the inclined portion PACO3 of the depression PACO are formed of a combination of a triangular shape and a hemispherical shape. The triangular and hemispherical shapes are formed by dividing one side (left side: triangle) and the other side (right side: hemispherical shape) with respect to the bottom part PACO4 of the depression PACO.

In the region defining the sealing line SL of the planarizing layer PAC, triangular and hemispherical jagged wrinkles (triangles and triangles) are formed by the outer portion PACO1, the inner portion PACO2 and the inclined portion PACO3 of the depressed portion PACO. Hemispheric concave and convex) are formed. This crease appears on a plane, providing a region that can further improve the contact area over a flat surface.

With this structure, the adhesive strength can be improved even if the size of the sealing region SL is reduced compared to the example of the fourth embodiment. As a result of the comparison in FIG. 11 and the structure in FIG. 16 indicate, the structure of the fourth embodiment can also reduce the bonding area while improving the adhesive strength. Since the adhesion member SEA is formed on the planarization layer PAC, the separation distance between the upper surface of the lower substrate SUB1 and the upper surface of the upper substrate SUB2 can be reduced, and the moisture permeability can also be lowered.

On the other hand, in the second to fourth embodiments, the outer portion (PACO1), the inner portion (PACO2), and the inclined portion (PACO3) formed by the depressed portion (PACO) have been described as serrated or hemispherical. However, this is only one example, and it can be modified into various forms such as a polygonal shape or a non-linear shape in order to increase the contact area.

As described above, the present invention has the effect of reducing the size of the bezel area of the display panel and improving the narrow bezel by reducing the bonding area while improving the adhesive strength. In addition, the present invention has the effect of reducing the separation distance between the substrates constituting the display panel, lowering the moisture permeability, preventing the adhesive member from flowing or overflowing, and improving the production yield and lifetime of the display panel.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood that the invention may be practiced. It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive. In addition, the scope of the present invention is indicated by the following claims rather than the detailed description. Also, all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

130: timing controller 140: gate driver
150: data driver 160: liquid crystal panel
170: Backlight unit SUB1: Lower substrate
GI: insulation layer PAC: planarization layer
PACO: depression PACO1: lateral side
PACO2: medial side PACO3:
PACO4: bottom SEA: adhesive member

Claims (6)

A lower substrate having a display region and a non-display region including subpixels;
A planarization layer positioned on a non-display area of the lower substrate;
A depression recessed from the planarization layer toward the lower substrate;
An adhesive member positioned on the depression; And
And an upper substrate bonded to the lower substrate by the adhesive member,
Wherein the depression includes an inclined region. The method according to claim 1,
The depression
An outer side portion adjacent to an outer edge of the lower substrate,
An inner side portion adjacent to the display region,
An inclined portion connecting the outer side portion and the inner side portion,
And a bottom portion having a flat surface same as the lower substrate,
Wherein the inclined region is defined by the outer side portion, the inner side portion, and the inclined portion. 3. The method of claim 2,
The outer side, the inner side and the inclined portion
Wherein the display device has a shape of a triangle, a saw-tooth, a hemisphere, a polygon, or a non-linear shape on a plane. 3. The method of claim 2,
The inclined region
Wherein the display device is horizontally symmetrical with respect to the bottom. 3. The method of claim 2,
The bottom
And exposing a lower layer existing under the planarizing layer. Defining a display area and a non-display area on the lower substrate;
Forming a planarization layer on the display region and the non-display region of the lower substrate;
Aligning a mask having a slit pattern portion and a non-slit pattern portion on the lower substrate and patterning the planarization layer so as to form a depression depressed from the planarization layer toward the lower substrate;
Forming an adhesive member on the depression; And
Preparing an upper substrate on the lower substrate, and sealing the lower substrate and the upper substrate using the adhesive member,
Wherein the depression comprises an inclined region,
Wherein the non-slit pattern portion is provided in a closed curve shape surrounding the display region, and the slit pattern portion is protruded outside the non-slit pattern portion.

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