KR101957977B1 - Flexible Display Device and Manufacturing Method the same - Google Patents

Abstract

The present invention relates to a flexible substrate; Subpixels formed on one surface of the flexible substrate; A protective film attached to one surface of the flexible substrate to protect the subpixels; A reinforcing substrate located on the other surface of the flexible substrate; And a bonding member for attaching the flexible substrate and the reinforcing substrate, wherein the bonding member has a rectangular shape so that a space layer is formed between the flexible substrate and the reinforcing substrate.

Description

TECHNICAL FIELD [0001] The present invention relates to a flexible display device and a manufacturing method thereof.

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

As the information technology is developed, the market of the flat panel display, which is a medium connecting between the user and the information, is getting bigger. Accordingly, an organic light emitting display (OLED), a liquid crystal display (LCD), an electrophoretic display (EPD), and a plasma display panel (PDP) And the like have been increasing in recent years.

Flat panel displays are becoming thinner and easier to use, and are being used in a wide variety of applications, from household appliances such as TVs and videos to handheld devices such as notebooks and mobile phones.

Some of the flat panel display devices listed above, for example, organic light emitting display devices, liquid crystal display devices, and electrophoretic display devices, are not only thin and easy to implement, but also can be implemented as flexible display devices, It is continuing.

When a flexible display device is manufactured using an organic electroluminescence display device, a liquid crystal display device, and an electrophoretic display device, a flexible substrate such as a polyimide film is used compared with plastic or glass. However, substrates with good flexibility, such as polyimide films, are required to be improved in resistance to external impacts and high defect rate due to foreign matter.

Disclosure of Invention Technical Problem [8] The present invention for solving the problems of the background art described above is to provide a flexible display device having a strong resistance to an external impact and having a low rate of occurrence of defects due to foreign matter, and a method of manufacturing the same. The present invention also provides a flexible display device having a structure capable of effectively discharging foreign matter introduced therein and a structure capable of providing ease of rework, and a method for manufacturing the same.

According to the present invention, there is provided a flexible substrate comprising: a flexible substrate; Subpixels formed on one surface of the flexible substrate; A protective film attached to one surface of the flexible substrate to protect the subpixels; A reinforcing substrate located on the other surface of the flexible substrate; And a bonding member for attaching the flexible substrate and the reinforcing substrate, wherein the bonding member has a rectangular shape so that a space layer is formed between the flexible substrate and the reinforcing substrate.

The bonding member may be formed corresponding to the outer frame corresponding to the non-display area of the flexible substrate.

The reinforcing substrate may have a rectangular groove along the outer rim on the surface facing the flexible substrate.

The adhesive member may be formed by two adhesive members so that the first through hole and the second through hole are separately formed on one side and the other side of the flexible substrate and the reinforcing substrate.

The adhesive member may further include a sub-adhesive member for sealing the hole formed by the first through hole and the second through hole.

In another aspect, the present invention provides a method comprising: forming subpixels on one side of a flexible substrate; Attaching a protective film to one surface of the flexible substrate to protect the subpixels; Forming an adhesive member on one surface of the reinforcing substrate; And attaching the flexible substrate and the reinforcing substrate using a bonding member by positioning one surface of the reinforcing substrate on the other surface of the flexible substrate, wherein the bonding member has a rectangular shape such that a space layer is formed between the flexible substrate and the reinforcing substrate The present invention also provides a method of manufacturing a flexible display device.

The bonding member may be formed corresponding to the outer frame corresponding to the non-display area of the flexible substrate.

The reinforcing substrate may have a rectangular groove along the outer rim on the surface facing the flexible substrate.

The adhesive member may be formed by two adhesive members so that the first through hole and the second through hole are separately formed on one side and the other side of the flexible substrate and the reinforcing substrate.

The step of attaching the reinforcing substrate may include blowing air through the first through hole when foreign matter is found between the flexible substrate and the reinforcing substrate, discharging the foreign material through the second through hole, and attaching the first through hole and the second through hole And sealing the formed hole with the sub-adhesive member.

The present invention has the effect of providing a flexible display device having a strong resistance to an external impact and having a low rate of occurrence of defects due to foreign matter, and a method of manufacturing the same. In addition, the present invention provides a flexible display device capable of dramatically reducing the rate of occurrence of defects due to foreign matter or the like, having a strong resistance from an impact or the like by using a structure capable of effectively discharging foreign matter introduced therein and a structure capable of providing ease of rework And a method for producing the same.

1 is a block diagram schematically showing a flexible display device according to a first embodiment of the present invention;
Figure 2 is an illustration of the subpixel shown in Figure 1;
3 is a partially exploded perspective view of a flexible display device according to a first embodiment of the present invention;
4 is a cross-sectional view of the flexible display device shown in Fig.
FIGS. 5 and 6 are enlarged views of the EA region of FIG. 4 to show a cross-sectional structure of the organic light emitting device. FIG.
7 is a cross-sectional view for explaining a comparison between a flexible display device according to a comparative example and a flexible display device according to the first embodiment;
8 is a view showing a structure of a display panel according to a second embodiment of the present invention.
9 is a view showing a structure of the reinforcing board and the adhesive member shown in Fig.
10 is a sectional view of one side of a display panel according to a second embodiment of the present invention.
11 is a view showing a structure of a display panel according to a third embodiment of the present invention.
12 is a view showing the structure of the reinforcing board shown in Fig.
13 is a view showing a structure in which an adhesive member is formed on the reinforcing substrate shown in Fig.
14 is a sectional view of one side of a display panel according to a third 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.

≪ Embodiment 1 >

FIG. 1 is a block diagram schematically showing a flexible display device according to a first embodiment of the present invention, and FIG. 2 is an exemplary view of the subpixel shown in FIG.

The flexible display device according to the first embodiment of the present invention includes a timing controller 120, a gate driver 130, a data driver 140, and a display panel 150.

The timing controller 120 collects device information (Extended Display Identification Data (EDID), compensation data, etc.) including the resolution, frequency, and timing information of the display panel 150 from an external memory unit through an I2C interface or the like. The timing controller 120 outputs a gate timing control signal GDC for controlling the operation timing of the gate driver 130 and a data timing control signal DDC for controlling the operation timing of the data driver 140. [ The timing controller 120 supplies the data driver 140 with the data signal DATA along with the data timing control signal DDC.

The data driver 140 samples and latches the data signal DATA in response to the data timing control signal DDC supplied from the timing controller 120, and converts the sampled data signal into a gamma reference voltage. The data driver 140 may be implemented as an integrated circuit (IC), mounted on the display panel 150, or mounted on an external substrate connected to the display panel 150. The data driver 140 supplies the data signal DATA to the sub-pixels SP included in the display panel 150 through the data lines DL.

The gate driver 130 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 120. The gate driver 130 may be mounted on the display panel 150 or may be mounted on an external substrate connected to the display panel 150. Also, the gate driver 130 may be formed on the display panel 150 in the form of a gate-in-panel. The gate driver 130 supplies a gate signal to the sub-pixels SP included in the display panel 150 through the gate lines GL.

The display panel 150 displays an image corresponding to the gate signal supplied from the gate driver 130 and the data signal DATA supplied from the data driver 140. The display panel 150 includes sub-pixels SP for controlling light to display an image. The subpixels SP included in the display panel 150 may be implemented as an organic light emitting device, a liquid crystal display device, and an electrophoretic display device. Hereinafter, in the present invention, it is assumed that the subpixels SP are composed of organic light emitting devices.

The sub-pixel composed of the organic light emitting device includes a switching transistor SW, a capacitor Cst, a driving transistor DR, a compensation circuit CC and an organic light emitting diode OLED. The switching transistor SW transfers the data signal DATA supplied through the data line DL1 to the capacitor Cst in response to the gate signal supplied through the gate line GL1. The capacitor Cst stores the data signal DATA as a data voltage. The driving transistor DR operates so that a driving current flows between the first power supply line VDD and the second power supply line GND in accordance with the data voltage stored in the capacitor Cst. The organic light emitting diode OLED emits light corresponding to the driving current supplied through the driving transistor DR. The compensation circuit CC compensates the threshold voltage of the driving transistor DR and the like. The compensation circuit CC consists of one or more transistors and a capacitor. The configuration of the compensation circuit (CC) is very various, and a detailed illustration and description thereof are omitted.

Meanwhile, a subpixel composed of an organic light emitting diode is formed of a 2T (Transistor) 1C (Capacitor) structure including a switching transistor SW, a driving transistor DR, a capacitor Cst, and an organic light emitting diode OLED. However, when the compensation circuit (CC) is added, it is composed of 3T1C, 4T2C, 5T2C, and the like. The subpixels having the above-described structure may be formed by a top emission method, a bottom emission method, or a dual emission method according to the structure.

On the other hand, a subpixel constituted by an organic light emitting device may be implemented with a subpixel structure including a white subpixel, a red subpixel, a green subpixel, and a blue subpixel in order to prevent luminance decline and color degradation of pure- have. In this case, the white subpixel, the red subpixel, the green subpixel, and the blue subpixel may be implemented using a white organic light emitting diode and an RGB color filter, or may be implemented by a method in which a light emitting material included in an organic light emitting diode is formed in white, Or the like.

Hereinafter, the configuration of a flexible display device according to the first embodiment of the present invention will be described. However, for convenience of explanation, the display panel included in the flexible display device is shown as a small model.

FIG. 3 is a partially exploded perspective view of a flexible display device according to a first embodiment of the present invention, and FIG. 4 is a cross-sectional view of the flexible display device shown in FIG.

According to the first embodiment, the display panel 150 is composed of a flexible substrate 151, a protective film 152, an adhesive member 155, and a reinforcing substrate 157. The data driver 140 is mounted on one side of the flexible substrate 151 and the connection substrate 180 is mounted on the lower side of the flexible substrate 151. Here, the gate driver is not shown because it is formed on the left side, the right side, or the left and right sides of one side of the flexible substrate 151 in the form of a gate-in-panel.

The flexible substrate 151 is made of a material that gives flexibility and has excellent restoring force such as polyester sulfone (PES), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyimide (PI) and polycarbonate But is not limited thereto. The reinforcing substrate 157 may be selected from materials similar to or the same as the flexible substrate 151, but is not limited thereto.

On one surface of the flexible substrate 151, subpixels composed of organic light emitting elements are formed. Subpixels composed of organic light emitting devices are vulnerable to outside air such as oxygen or moisture. Therefore, on the flexible substrate 151, a protective film 152 or a flexible protective substrate that can seal the organic light emitting element is attached.

In the protective film 152, a region where light of the organic light emitting device emits light is defined as a display region AA, and other regions are defined as a non-display region NA. The display area AA and the non-display area NA are displayed only on the protective film 152. However, in the flexible substrate 151 attached to the protective film 152, other areas except for the display area AA Are all defined as non-display areas (NA).

The display panel 150 according to the first embodiment attaches the reinforcing substrate 157 to the other surface (or back surface) of the flexible substrate 151 in order to reinforce the flexibility of the flexible substrate 151 and the rigidity thereof. The reinforcing substrate 157 is attached to the flexible substrate 151 by an adhesive member 155.

The adhesive member 155 is selected from a double-sided tape, a pressure-sensitive adhesive, a sealant, or the like. The adhesion member 155 is formed on one surface of the reinforcing substrate 157 so as to correspond to the non-display area NA of the flexible substrate 151. More specifically, the adhesive member 155 is formed on one surface of the reinforcing substrate 157 in correspondence with the outer frame corresponding to the non-display area NA of the flexible substrate 151.

The adhesive member 155 is formed in a square (or frame) shape having a space therein. A space layer AG is formed between the flexible substrate 151 and the reinforcing substrate 157 when the flexible substrate 151 and the reinforcing substrate 157 are attached as the adhesive member 155 has a rectangular shape having a space do. The space layer AG may be filled with air or filled with gas or the like. The space layer AG formed between the flexible substrate 151 and the reinforcing substrate 157 may serve as an air cushion.

Hereinafter, the structure of the organic light emitting device formed on one side of the flexible substrate 151 and the structure of the protective film will be described.

FIGS. 5 and 6 are enlarged views of the EA region of FIG. 4 to show the cross-sectional structure of the organic light emitting device.

A buffer layer 161 is formed on one surface of the flexible substrate 151. The buffer layer 161 may be formed to protect a thin film transistor or the like formed in a subsequent process from impurities such as alkali ions or the like flowing out from the flexible substrate 151. The buffer layer 161 may be formed of silicon oxide (SiOx), silicon nitride (SiNx), or the like, which may be omitted.

On the buffer layer 161, a driving transistor DR and an organic light emitting diode OLED are formed. The driving transistor DR includes a gate electrode 162, a semiconductor layer 164, a source electrode 165a, and a drain electrode 165b. A gate electrode 162 is formed on the buffer layer 161. A first insulating film 163 is formed on the gate electrode 162. The semiconductor layer 164 is formed on the first insulating film 163. The source electrode 165a and the drain electrode 165b are formed so as to be in contact with one side and the other side of the semiconductor layer 164, respectively. A second insulating film 166 is formed on the source electrode 165a and the drain electrode 165b. A switching transistor (not shown), a capacitor (not shown), various wirings, and the like are formed on the buffer layer 161 in addition to the driving transistor DR.

The organic light emitting diode OLED includes a lower electrode 171, an organic light emitting layer 173, and an upper electrode 174. The lower electrode 171 is formed on the second insulating film 166. The lower electrode 171 is formed to be connected to the drain electrode 165b of the driving transistor DR exposed through the second insulating film 166. [ The lower electrode 171 is formed separately for each subpixel. The lower electrode 171 is selected as an anode electrode or a cathode electrode. On the lower electrode 171, a bank layer 172 is formed. The bank layer 172 is a layer that defines the opening region of the subpixel. An organic light emitting layer 173 is formed on the lower electrode 171.

The organic light emitting layer 173 includes a hole injection layer (HIL), a hole transport layer (HTL), a light emitting layer (EML), an electron transport layer (ETL) and an electron injection layer (EIL). At least one other functional layer (HIL, HTL, ETL, EIL) other than the light emitting layer (EML) of the organic light emitting layer 173 may be omitted. The organic light emitting layer 173 may further include a blocking layer or a barrier layer for adjusting energy levels of holes and electrons. The upper electrode 174 is formed on the organic light emitting layer 173. The upper electrode 174 is formed in the form of a face-to-face electrode that is commonly connected to all the sub-pixels. The upper electrode 174 is selected as a cathode electrode or an anode electrode.

A protective film 152 is formed on the upper electrode 174. The protective film 152 may be formed in the form of a single layer film as shown in FIG. In this case, the protective film 152 may be formed of a transparent face sealant or a transparent film.

Alternatively, the protective film 152 may be formed in the form of a multilayer film as shown in FIG. In this case, the protective film 152 may be formed of an organic-inorganic hybrid layer composed of the organic layer 152a, the inorganic layer 152b, the organic layer 152c, and the inorganic layer 152d. Although not shown, the interior of the organic / inorganic composite layer may further include a moisture absorption layer or the like for absorbing moisture or oxygen.

Hereinafter, the flexible display device according to the comparative example and the flexible display device according to the first embodiment will be described in comparison.

7 is a cross-sectional view for explaining a comparison between a flexible display device according to a comparative example and a flexible display device according to the first embodiment.

As shown in FIG. 7A, in the flexible display device according to the comparative example, the flexible substrate 151 and the reinforcing substrate 157 are attached by the front bonding member 158. When the flexible substrate 151 and the reinforcing substrate 157 are attached using the front adhesive member 158, the adhesive force of the front adhesive member 158 acts on all areas of the flexible substrate 151 and the reinforcing substrate 157 It is possible to increase the adhesion and rigidity.

However, when the flexible substrate 151 and the reinforcing substrate 157 are attached using the front bonding member 158, foreign matter (PT) flows from the outside during the attaching process. For reference, the foreign object PT flows through various paths in various processes as well as the flexible substrate 151, the front adhesion member 158, and the like.

When the flexible substrate 151 and the reinforcing substrate 157 are attached using the front bonding member 158, the air layer AL is formed between the flexible substrate 151 and the reinforcing substrate 157 during the attaching process. For reference, since the flexible substrate 151 and the reinforcing substrate 157 have a flat structure, removal of the air layer AL is not easy unless a separate suction equipment or the like is provided. Even if a suction device is provided, it is not easy to remove the air layer AL formed at the center of the display area AA or the like.

As a result, since the flexible display device according to the comparative example uses the front adhesive member 158 when the flexible substrate 151 and the reinforcing substrate 157 are attached, the foreign substance PT or the air layer AL ) Is formed, it is judged that there is a display failure or a foreign matter defect thereafter. However, since the flexible display device according to the comparative example uses the front bonding member 158, the flexible substrate 151 and the reinforcing substrate 157, which have already been attached, are difficult to peel off and are highly likely to be discarded.

7 (b), the flexible display device according to the first embodiment is attached by a rectangular bonding member 155 having a flexible substrate 151 and a reinforcing substrate 157 having a space therein . If the flexible substrate 151 and the reinforcing substrate 157 are attached to each other using the rectangular shaped bonding member 155, even if the foreign matter PT flows from the outside during the attaching process (or after the attaching process) brush can be used to remove and reattach. That is, since the rectangular shaped adhesive member 155 is easy to remove in accordance with the material (when the double-sided tape or the like is selected), if the foreign matter PT is found, the attached rectangular shaped adhesive member 155 is removed, It is easy to carry out a re-work process.

On the other hand, when using the rectangular shaped bonding member 155, it is possible to attempt reattachment, so that only a very small foreign body (PT) can exist. For reference, even if the foreign object PT having a small size is located in the display area AA or the like, it can not be judged as display failure, foreign object defect, or the like.

In addition, when the flexible substrate 151 and the reinforcing substrate 157 are attached to each other using the rectangular-shaped adhesive member 155, the problem that the air layer AL is formed during the attaching process can be prevented. Even if the air layer AL is formed, since the air layer AL is formed in the non-display area NA, it can not be judged as display defects, foreign matter defects, or the like.

≪ Embodiment 2 >

FIG. 8 is a view showing a structure of a display panel according to a second embodiment of the present invention, FIG. 9 is a view showing the structure of the reinforcing substrate and the adhesive member shown in FIG. 8, and FIG. 1 is a cross-sectional view of one side of a display panel according to an example.

According to the second embodiment, the rectangular bonding member 155 formed between the flexible substrate 151 and the reinforcing substrate 157 is divided into two parts. Specifically, a first bonding member 155a is attached to one side of the reinforcing substrate 157 (or the rear surface of the flexible substrate), and a second bonding member 155b is attached to the other side of the reinforcing substrate 157 (or the back surface of the flexible substrate) Respectively.

The two adhesive members 155a and 155b have a spaced space rather than a closed curve shape. Accordingly, when the first and second adhesive members 155a and 155b are attached between the flexible substrate 151 and the reinforcing substrate 157, the first through hole 155IN and the second through hole 155OUT are formed .

It is preferable that the first through hole 155IN and the second through hole 155OUT are formed so as to correspond to each other in the middle region between the flexible substrate 151 and the reinforcing substrate 157 as shown in the figure, .

8, if a foreign matter PT is found between the flexible substrate 151 and the reinforcing substrate 157, air (air) is applied to the display panel 150 using an air brush Removing foreign matter (PT) adhering to the inside or blowing the formed foreign matters (PT). That is, the first through hole 155IN and the second through hole 155OUT are used as holes for removing foreign matters (PT) and the like. The structure for forming the through-hole in this manner can be adopted when the first and second adhesive members 155a and 155b are selected as a material having strong adhesion such as a sealant, but is not limited thereto.

On the other hand, after removing the foreign material PT, the first through hole 155IN and the second through hole 155OUT are sealed by the sub adherent member 159 as shown in FIG. The sub-adhesive member 159 may use the same material as the first and second adhesive members 155a and 155b, but is not limited thereto.

≪ Third Embodiment >

11 is a view showing a structure of a display panel according to a third embodiment of the present invention, FIG. 12 is a view showing the structure of the reinforcing substrate shown in FIG. 11, Fig. 14 is a sectional view of one side of a display panel according to the third embodiment of the present invention. Fig.

According to the third embodiment, a groove 157H is formed on one surface of the reinforcing substrate 157 facing the flexible substrate 151. [ The groove 157H is formed in a rectangular (or frame) shape. When the grooves 157H are formed in the reinforcing substrate 157, the adhesive force by the adhesive member 155 can be increased. For example, in order to increase the adhesive force using the groove 157H, if the inside of the groove 157H is formed in an upright convex shape without being formed flat, the adhesive force can be further improved. Further, when the groove 157H is formed in the reinforcing substrate 157, the thickness of the adhesive member 155 can be prevented from increasing, so that the flexible display device can be further thinned.

Third Embodiment The rectangular bonding member 155 formed between the flexible substrate 151 and the reinforcing substrate 157 is also divided into two parts. Specifically, a first bonding member 155a is attached to one side of the reinforcing substrate 157 and a second bonding member 155b is attached to the other side of the reinforcing substrate 157. [

The two adhesive members 155a and 155b have a spaced space rather than a closed curve shape. Accordingly, when the first and second adhesive members 155a and 155b are attached between the flexible substrate 151 and the reinforcing substrate 157, the first through hole 155IN and the second through hole 155OUT are formed .

It is preferable that the first through hole 155IN and the second through hole 155OUT are formed so as to correspond to each other in the middle region between the flexible substrate 151 and the reinforcing substrate 157 as shown in the figure, .

According to the above structure, if a foreign object (PT) is found between the flexible substrate 151 and the reinforcing substrate 157 after the display panel 150 is manufactured, if air (air) It is possible to remove foreign matter (PT) that is adhered to or formed on the substrate. That is, the first through hole 155IN and the second through hole 155OUT are commonly used as holes for removing foreign objects (PT) and the like.

On the other hand, after the foreign object PT is removed, the first through hole 155IN and the second through hole 155OUT are sealed by the sub-adhesive member 159 as shown in FIG. The sub-adhesive member 159 may use the same material as the first and second adhesive members 155a and 155b, but is not limited thereto.

INDUSTRIAL APPLICABILITY The present invention provides a flexible display device having a strong resistance to an external impact and having a low rate of occurrence of defects due to foreign matter and a manufacturing method thereof. In addition, the present invention provides a flexible display device capable of dramatically reducing the rate of occurrence of defects due to foreign matter or the like, having a strong resistance from an impact or the like by using a structure capable of effectively discharging foreign matter introduced therein and a structure capable of providing ease of rework And a method for producing the same.

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.

120: timing controller 130: gate driver
140: Data driver 150: Display panel
151: flexible substrate 152: protective film
155: Adhesive member 157: Reinforced substrate
AG: space layer PT: foreign matter
AL: air layer 155IN: first through hole
155OUT: second through hole

Claims (11)

A flexible substrate;
Subpixels formed on one surface of the flexible substrate;
A protective film attached to one surface of the flexible substrate to protect the sub pixels;
A data driver disposed on one surface of the flexible substrate;
A reinforcing substrate located on the other surface of the flexible substrate and corresponding to the size of the flexible substrate; And
And a bonding member for attaching the flexible substrate and the reinforcing substrate,
Wherein the flexible substrate has one side longer than the protective film so that the data driver is disposed,
Wherein the adhesive member has a rectangular shape corresponding to the outer edges of the flexible substrate and the reinforcing substrate such that a space layer is formed between the flexible substrate and the reinforcing substrate. The method according to claim 1,
The adhesive member
Wherein the flexible substrate is formed to correspond to an outer frame corresponding to a non-display area of the flexible substrate. The method according to claim 1,
The reinforcing substrate
Wherein the flexible substrate has a rectangular shape along an outer rim on a surface facing the flexible substrate. The method according to claim 1,
The adhesive member
Wherein the flexible substrate and the reinforcing substrate are divided into two bonding members such that the first through hole and the second through hole are separately formed on one side and the other side of the flexible substrate and the reinforcing substrate. 5. The method of claim 4,
The adhesive member
And a sub-adhesive member for sealing the hole formed by the first through hole and the second through hole. Forming subpixels on one side of the flexible substrate;
Attaching a protective film to one surface of the flexible substrate to protect the sub-pixels;
Disposing a data driver on one surface of the flexible substrate;
Forming an adhesive member on one surface of the reinforcing substrate corresponding to the size of the flexible substrate; And
Positioning the one surface of the reinforcing substrate on the other surface of the flexible substrate and attaching the flexible substrate and the reinforcing substrate using the adhesive member,
Wherein the flexible substrate has one side longer than the protective film so that the data driver is disposed,
Wherein the adhesive member has a rectangular shape corresponding to an outer edge of the flexible substrate and the reinforcing substrate such that a space layer is formed between the flexible substrate and the reinforcing substrate. The method according to claim 6,
The adhesive member
Wherein the flexible substrate is formed to correspond to an outer frame corresponding to a non-display area of the flexible substrate. The method according to claim 6,
The reinforcing substrate
Wherein the flexible substrate has a rectangular shape along an outer rim on a surface facing the flexible substrate. The method according to claim 6,
The adhesive member
Wherein the flexible substrate and the reinforcing substrate are divided into two adhesive members so that the first through hole and the second through hole are separately formed on one side and the other side of the flexible substrate and the reinforcing substrate. 10. The method of claim 9,
The step of attaching the reinforcing substrate
Wherein when foreign matter is found between the flexible substrate and the reinforcing substrate, air is blown through the first through hole to discharge the foreign matter through the second through hole,
And sealing the hole formed by the first through hole and the second through hole using a sub adhesive member. The method of claim 3,
The groove
A flexible display device having a convex shape.

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