KR20190028058A - Display Device - Google Patents

Abstract

According to the present invention, a display device comprises: a display panel displaying an image; a cover unit disposed on the lower side of the display panel; a gap holding member disposed between the display panel and the cover unit; and a bonding member located outside the gap holding member and bonding the display panel and the cover unit. The bonding member includes a first bonding portion and a second bonding portion outside the first bonding portion. The storage modulus of the first bonding portion is smaller than that of the second bonding portion, the elongation of the first bonding portion is larger than that of the second bonding portion, and the strength of the second bonding portion is larger than that of the first bonding portion. Therefore, the peeling of the bonding member can be prevented by relieving the warpage of the display panel and the cover unit by the first bonding portion. The second bonding portion can prevent the outer surface from being pressed and scratched. When the application failure occurs, the separation process of the display panel and the cover unit can be facilitated. Further, since the first bonding portion includes a pigment or a dye to form a specific color, various designs of display devices can be provided.

Description

[0001]

The present invention relates to a display apparatus, and more particularly to a display apparatus having a narrow bezel.

In view of the information age, the display field has also been rapidly developed. As a flat panel display device (FPD) having the advantages of thinning, light weight, and low power consumption in response to the information age, ) And an electroluminescent display device (ELD) have been developed and widely used.

Such a flat panel display device is widely used in a portable device such as a smartphone, a monitor of a computer, or a television. The display panel of each flat panel display device is modularized, manufactured, and supplied through various devices such as a case or a cover .

At this time, the display panel of the flat panel display has a display area for displaying an image and a non-display area surrounding the display area, and a case or a cover located on the front surface of the display panel covers the non-display area. Here, the case or the cover portion covering the non-display region is a bezel region of the product.

This bezel area is an area where no image is displayed, which increases the size of the product and deteriorates the appearance of the product.

Therefore, in recent years, by omitting or minimizing a mechanism such as a case, it is possible to reduce the thickness and weight and reduce the bezel area, maximize the size of the display area in the same size display device, borderless products are being researched and developed.

To this end, a structure has been proposed in which an adhesive tape is applied between a display panel and an instrument supporting the display panel, and the adhesive tape fixes the display panel on the instrument by strong adhesive force.

However, if adhesion failure occurs, the display panel and the structure must be separated from each other, and separate equipment is required for separation, which increases the cost. In addition, it is difficult to separate the display panel and the mechanism from each other due to the strong adhesive force of the adhesive tape, and the display panel is damaged in the process of separating the display panel and the apparatus. Therefore, the display device in which the adhesion failure occurs can not be recycled, which lowers the productivity and increases the cost.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to solve a problem of a decrease in productivity and an increase in cost due to adhesion failure of a display device.

In order to achieve the above object, a display device of the present invention includes a display panel for displaying an image, a cover unit below the display panel, a gap holding member between the display panel and the cover unit, And a bonding member for bonding the panel and the cover unit, wherein the bonding member includes a first bonding portion and a second bonding portion outside the first bonding portion.

At this time, the storage modulus of the first bonding portion is smaller than that of the second bonding portion, the elongation of the first bonding portion is larger than that of the second bonding portion, and the strength of the second bonding portion is larger than that of the first bonding portion.

Further, the first bonding portion may include a pigment or a dye, and the second bonding portion is transparent.

In the present invention, the weight and thickness of the display device can be reduced by fixing the display panel to the structure using the adhesive member.

In addition, the bezel area can be reduced and the borderless structure can be realized, thereby making it possible to differentiate the design.

Further, since the adhesive member of the present invention is made of an adhesive resin, the cost can be reduced as compared with the conventional method using an adhesive tape. By applying the adhesive member to the external appearance of a display device without a separate component, Can achieve excellent design.

Further, in the present invention, when the adhesion failure occurs, the display panel can be easily separated from the structure without damaging it, so that the productivity and the cost can be improved by recycling the display panel and the structure.

1 is a cross-sectional view schematically showing a display device according to an embodiment of the present invention.
2 is a plan view schematically showing a display device according to an embodiment of the present invention.
3A and 3B are schematic cross-sectional views illustrating an example of a display panel of a display device according to an embodiment of the present invention.
4A to 4F are cross-sectional views schematically showing a manufacturing process of a display device according to an embodiment of the present invention.
5A to 5C are cross-sectional views schematically showing a display device according to another embodiment of the present invention.

A display device according to an embodiment of the present invention includes a display panel for displaying an image, a cover unit under the display panel, a gap holding member between the display panel and the cover unit, And a bonding member for bonding the display panel and the cover unit, wherein the bonding member includes a first bonding portion and a second bonding portion outside the first bonding portion.

The storage modulus of the first adhesive portion is smaller than that of the second adhesive portion.

And the elongation of the first bonding portion is larger than that of the second bonding portion.

The strength of the second bonding portion is larger than that of the first bonding portion.

The first bonding portion includes a pigment or a dye, and the second bonding portion is transparent.

The second adhesive portion is thicker than the first adhesive portion.

The first adhesive portion is in contact with the lower surface of the display panel and the upper surface of the cover unit.

The second adhesive portion is in contact with the side surface of the display panel and the upper surface of the cover unit.

A side sealing portion is formed on a side surface of the display panel, and the first bonding portion is spaced apart from the side sealing portion or overlaps with a part of the side sealing portion.

Hereinafter, a display device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view schematically showing a display device according to an embodiment of the present invention, and FIG. 2 is a plan view schematically showing a display device according to an embodiment of the present invention.

1 and 2, a display device according to an embodiment of the present invention includes a display panel 110, a cover unit 120 positioned on the rear surface side of the display panel 110, A gap holding member 130 between the cover 110 and the cover unit 120 and an adhesive member 140 outside the gap holding member 130.

The display panel 110 includes a plurality of pixels, and displays an image through a front surface. For example, the display panel 110 may be an electroluminescent display panel including a light emitting diode or a liquid crystal display panel including a liquid crystal capacitor, but the present invention is not limited thereto.

Such a display panel 110 will be described in more detail with reference to FIGS. 3A and 3B. 3A and 3B are schematic cross-sectional views showing an example of a display panel of a display device according to an embodiment of the present invention, and show one pixel region.

First, as shown in FIG. 3A, the display panel 110 of the present invention may be an electroluminescent display panel.

That is, the display panel 110 includes a substrate 150, a thin film transistor Tr disposed on the substrate 150, a light emitting diode D connected to the thin film transistor Tr, D of the encapsulation film 190.

In more detail, a semiconductor layer 154 is formed on the substrate 150. The substrate 150 may be made of glass or plastic, and may have flexibility. A buffer layer (not shown) may be formed between the substrate 150 and the semiconductor layer 154, and the buffer layer may be formed of an inorganic insulating material such as silicon oxide or silicon nitride.

Meanwhile, the semiconductor layer 154 may be formed of an oxide semiconductor material or polycrystalline silicon.

When the semiconductor layer 154 is made of an oxide semiconductor material, a light shielding pattern (not shown) may be formed under the semiconductor layer 154, and the light shielding pattern may prevent light from being incident on the semiconductor layer 154 Thereby preventing the semiconductor layer 154 from being deteriorated by light. Alternatively, the semiconductor layer 154 may be made of polycrystalline silicon. In this case, impurities may be doped on both edges of the semiconductor layer 154.

A gate insulating layer 156 made of an insulating material is formed on the semiconductor layer 154. The gate insulating layer 156 may be formed of an inorganic insulating material such as silicon oxide or silicon nitride.

A gate electrode 160 made of a conductive material such as metal is formed on the gate insulating layer 156 to correspond to the center of the semiconductor layer 154.

3A, the gate insulating layer 156 is formed on the entire surface of the substrate 150, but the gate insulating layer 156 may be patterned to have the same shape as the gate electrode 160.

An interlayer insulating layer 162 made of an insulating material is formed on the gate electrode 160. The interlayer insulating film 162 may be formed of an inorganic insulating material such as silicon oxide or silicon nitride, or an organic insulating material such as benzocyclobutene or photo-acryl.

The interlayer insulating layer 162 has first and second contact holes 164 and 166 that expose both sides of the semiconductor layer 154. The first and second contact holes 164 and 166 are spaced apart from the gate electrode 160 on both sides of the gate electrode 160.

Here, the first and second contact holes 164 and 166 are also formed in the gate insulating film 166. Alternatively, when the gate insulating film 166 is patterned in the same shape as the gate electrode 160, the first and second contact holes 164 and 166 may be formed only in the interlayer insulating film 162.

A source electrode 170 and a drain electrode 172 made of a conductive material such as a metal are formed on the interlayer insulating layer 162.

The source electrode 170 and the drain electrode 172 are spaced apart from each other around the gate electrode 160 and are connected to both sides of the semiconductor layer 154 through the first and second contact holes 164 and 166, / RTI >

The semiconductor layer 154 and the gate electrode 160, the source electrode 170 and the drain electrode 172 constitute the thin film transistor Tr, and the thin film transistor Tr includes a driving element ).

The thin film transistor Tr has a coplanar structure in which the gate electrode 160, the source electrode 170, and the drain electrode 172 are positioned above the semiconductor layer 154.

Alternatively, the thin film transistor Tr may have an inverted staggered structure in which a gate electrode is positioned below the semiconductor layer and a source electrode and a drain electrode are located above the semiconductor layer. In this case, the semiconductor layer may be made of amorphous silicon.

Although not shown, a gate line and a data line cross each other to define a pixel region, and a switching element connected to the gate line and the data line is further formed. The switching element is connected to the thin film transistor Tr which is a driving element.

In addition, a storage capacitor is formed so that the power wiring is spaced apart in parallel to the gate wiring or the data wiring, and the voltage of the gate electrode of the thin film transistor (Tr), which is a driving element during one frame, Lt; / RTI >

A protective layer 174 having a drain contact hole 176 exposing the drain electrode 172 of the thin film transistor Tr is formed to cover the thin film transistor Tr.

A first electrode 180 connected to the drain electrode 172 of the thin film transistor Tr through the drain contact hole 176 is formed on the passivation layer 174 for each pixel region. The first electrode 180 may be an anode and may be formed of a conductive material having a relatively large work function value. For example, the first electrode 170 may be made of a transparent conductive material such as indium-tin-oxide (ITO) or indium-zinc-oxide (IZO) .

Meanwhile, when the display panel 110 of the present invention is a top emission type electroluminescent display panel, a reflective electrode or a reflective layer may be further formed under the first electrode 170. For example, the reflective electrode or the reflective layer may be formed of an aluminum-palladium-copper (APC) alloy.

A bank layer 186 covering the edge of the first electrode 180 is formed on the passivation layer 174. The bank layer 186 exposes the center of the first electrode 180 corresponding to the pixel region.

A light emitting layer 182 is formed on the first electrode 180. The light emitting layer 182 may be a single layer structure of a light emitting material layer made of a light emitting material. Alternatively, the light emitting layer 182 may have a multilayer structure. For example, the light emitting layer 182 may include a hole injection layer, a hole injection layer, and a hole injection layer sequentially stacked on the first electrode 180. a transporting layer, a light emitting material layer, an electron transporting layer, and an electron injection layer. Here, the light emitting material of the light emitting material layer may be an organic light emitting material or an inorganic light emitting material such as a quantum dot.

A second electrode 184 is formed on the substrate 150 on which the light emitting layer 182 is formed. The second electrode 184 is disposed on the entire surface of the display region and is made of a conductive material having a relatively small work function value and can be used as a cathode. For example, the second electrode 184 may be formed of any one of aluminum (Al), magnesium (Mg), and aluminum-magnesium alloy (AlMg).

The first electrode 180, the light emitting layer 182, and the second electrode 184 form a light emitting diode (D).

An encapsulation film 190 is formed on the second electrode 184 to prevent external moisture from penetrating the light emitting diode D. The encapsulation film 190 may have a laminated structure of a first inorganic insulating layer 192, an organic insulating layer 194, and a second inorganic insulating layer 196, but is not limited thereto.

When the display panel 110 of the present invention is a top emission type electroluminescence display panel, a polarizing plate (not shown) for reducing external light reflection may be attached on the encapsulation film 190. For example, the polarizer may be a circular polarizer.

Meanwhile, as shown in FIG. 3B, the display panel 110 of the present invention may be a liquid crystal display panel.

That is, the display panel 110 includes first and second substrates 210 and 250 facing each other, and a liquid crystal layer 262 interposed between the first and second substrates 210 and 250, Layer 260 and the first and second polarizers 272 and 274 may be disposed on the outer surfaces of the first and second substrates 210 and 250, respectively.

The first substrate 210 may be made of glass or plastic, and may have flexibility. In addition, a buffer layer (not shown) may be further formed on the first substrate 210.

A gate electrode 222 is formed on the first substrate 210 and a gate insulating film 224 is formed to cover the gate electrode 222. A gate wiring (not shown) connected to the gate electrode 222 is formed on the first substrate 110.

A semiconductor layer 226 is formed on the gate insulating layer 224 in correspondence with the gate electrode 222. The semiconductor layer 226 may be made of an oxide semiconductor material. Meanwhile, the semiconductor layer 226 may include an active layer made of amorphous silicon and an ohmic contact layer made of impurity amorphous silicon.

A source electrode 230 and a drain electrode 232 are formed on the semiconductor layer 226. In addition, a data line (not shown) connected to the source electrode 230 intersects the gate line to define a pixel region.

The gate electrode 222, the semiconductor layer 226, the source electrode 230, and the drain electrode 232 constitute a thin film transistor Tr.

A protective layer 234 having a drain contact hole 236 exposing the drain electrode 232 is formed on the thin film transistor Tr.

A pixel electrode 240 connected to the drain electrode 232 through the drain contact hole 236 and a common electrode 242 alternately arranged with the pixel electrode 240 are formed on the passivation layer 234, .

On the second substrate 250, a black matrix 254 covering the non-display regions such as the thin film transistor Tr, the gate line, and the data line is formed. Further, a color filter layer 256 is formed corresponding to the pixel region. A buffer layer (not shown) may be further formed between the second substrate 250 and the color filter layer 256.

The first and second substrates 210 and 250 are bonded together with the liquid crystal layer 260 interposed therebetween and the liquid crystal layer 260 is formed by an electric field generated between the pixel electrode 240 and the common electrode 242. [ Of the liquid crystal molecules 262 are driven. The pixel electrode 240, the common electrode 242, and the liquid crystal layer 260 form a liquid crystal capacitor, and the liquid crystal capacitor is connected to the thin film transistor Tr.

Although not shown, an alignment layer may be formed on each of the first and second substrates 210 and 250 in contact with the liquid crystal layer 260.

On the other hand, first and second polarizers 272 and 274, which transmit only linear polarized light in a specific direction, are attached to the outer surfaces of the first and second substrates 210 and 250, respectively. Polarizing plate 274 and the light-transmitting axis of the polarizing plate 274.

The common electrode 242 is arranged on the first substrate 210 in an alternating manner with the pixel electrode 240. Alternatively, the common electrode 242 may be disposed on the entire surface of the second substrate 250 And the pixel electrode 240 may be formed in a plate shape in the pixel region.

Referring to FIGS. 1 and 2 again, a side sealing part 112 is formed on a side surface of the display panel 110 to prevent light leakage generated from the side surface of the display panel 110. [ A portion of the light output from the display panel 110 proceeds to the side of the display panel 110. In the present invention, since the side sealing portion 112 is provided on the side surface of the display panel 110, Suppresses light leakage due to light traveling to the side. Further, the side sealing portion 112 protects the side surface of the display panel 110 from an external impact.

The side sealing part 112 may be formed of a material that absorbs light, and may be formed by applying a sealing liquid to the side surface of the display panel 110 and then curing the sealing liquid.

This side sealing portion 112 can completely cover the side surface of the display panel 110. [ Alternatively, the side sealing portion 112 may cover only a part of the side surface of the display panel 110, and the side sealing portion 112 may partially expose the upper and lower surfaces of the side surface of the display panel 110.

Next, the cover unit 120 is positioned on the rear side of the display panel 110, that is, below the display panel 110. [ This cover unit 120 may have a hemming structure with its ends folded.

In more detail, the cover unit 120 includes a first portion 122 and a second portion 124. The first part 122 has a plate shape corresponding to the back surface of the display panel 110 and the second part 124 is connected to the first part 122 and the inner surface thereof is connected to the inner surface of the first part 122 And the second portion 124 overlaps with the first portion 122. In this way, The cover unit 120 having such a hemming structure has a curved side surface. Thus, by exposing the cover unit 120 to the outside without a separate component, it is possible to provide a display device having differentiated and excellent design, and it is possible to prevent the user from being injured by angled corners.

When the display panel 110 is an electroluminescent display panel, the cover unit 120 may be a back cover. Alternatively, when the display panel 110 is a liquid crystal display panel, the cover unit 120 may be a bottom cover. In this case, a backlight unit (not shown) may be used as a light source between the display panel 110 and the butter cover. ) Can be located.

The cover unit 120 may be made of a metal material having a relatively high stiffness, but is not limited thereto. For example, the cover unit 120 may be formed of an electrolytic galvanized iron (EGI) containing iron (Fe) as a main component.

Alternatively, the cover unit 120 may be a middle frame between the back cover and the display panel 110 or between the bottom cover and the display panel 110.

Although not shown in the drawings, between the display panel 110 and the cover unit 120, more specifically, between the display panel 110 and the first portion 122 of the cover unit 120, Plates and the like can be further positioned.

The driving unit is connected to at least one side of the display panel 110 to apply various signals to the display panel 110. The driving unit may include a printed circuit board (PCB) and at least one integrated circuit (IC) on a printed circuit board. The integrated circuit may be, but is not limited to, a timing controller (T-Con) or a power IC. The driving unit may further include a resistor, a capacitor, or a transistor on the printed circuit board.

The driving unit is connected to the display panel 110 through an intermediate means and is placed on the rear surface of the display panel 110 in the modularization process. At this time, the printed circuit board is positioned between the display panel 110 and the integrated circuit. Here, the intermediate means may be a flexible printed circuit (FPC), a tape or a film, but is not limited thereto.

The heat dissipating member is in contact with the integrated circuit of the driving unit or the display panel 110 to quickly transfer heat generated from the integrated circuit of the driving unit or the display panel 110 to the outside, thereby preventing the device from being deteriorated by heat.

The auxiliary plate increases the rigidity of the display device to prevent the occurrence of warpage. That is, in the case of a display device having a large screen size, warping of the display device may occur. By adding an auxiliary plate to increase the rigidity of the display device, it is possible to prevent the display device from warping.

The gap holding member 130 is positioned between the display panel 110 and the cover unit 120 and more particularly between the display panel 110 and the second portion 124 of the cover unit 120, The interval between the panel 110 and the cover unit 120 is kept constant. Here, the gap holding member 130 may be a single-sided tape having adhesiveness on one side, and the gap holding member 130 may contact the cover unit 120 with a surface having adhesiveness .

The gap holding member 130 may be formed on the display panel 110 except for a portion to which the driving unit is connected. That is, the gap holding member 130 may be formed to correspond to three surfaces of the display panel 110 and may have a 'C' shape, but is not limited thereto.

The gap holding members 130 are spaced apart from the side surface of the display panel 110 by a predetermined distance d1. In one example, the spacing d1 of the gap retaining members 130 may be between 0.5 mm and 1.5 mm, preferably between 0.7 mm and 1.0 mm, but is not limited thereto.

An adhesive member 140 is formed on the outer side of the gap holding member 130 so that the display panel 110 and the cover unit 20 are fixed to each other via an adhesive member 140. [ The adhesive member 140 includes a first adhesive portion 142 and a second adhesive portion 144 outside the first adhesive portion 142. [

Here, the first adhesive portion 142 surrounds the gap holding member 130 and has a substantially rectangular frame shape. The first adhesive portion 142 is in contact with the lower surface of the edge of the display panel 110 and the upper surface of the second portion 124 of the cover unit 120. The first adhesive portion 142 may be spaced apart from the gap holding member 130. Alternatively, the first adhesive portion 142 may be in contact with the gap holding member 130.

The first thickness t1 of the first adhesive portion 142 corresponds to the thickness of the gap holding member 130. [ In one example, the first thickness t1 of the first adhesive portion 142 may be 0.5 mm to 1 mm, but is not limited thereto.

The first adhesive portion 142 may be spaced apart from the side sealing portion 112 on the side of the display panel 110. Alternatively, the first adhesive portion 142 may contact and / or overlap with a portion of the side sealing portion 112.

On the other hand, the second adhesive portion 144 contacts the first adhesive portion 142 to surround the first adhesive portion 142 and has a substantially rectangular shape. The second adhesive portion 144 is in contact with the side surface of the display panel 110 where the side sealing portion 112 is located and the upper surface of the second portion 124 of the cover unit 120. The second adhesive portion 144 can completely cover the side sealing portion 112.

The second thickness t2 of the second adhering portion 144 corresponds to the thickness of the display panel 110 and the second thickness t2 of the second adhering portion 144 corresponds to the first thickness t2 of the first adhering portion 142 t2). In one example, the second thickness t2 of the second adhesive portion 144 may be 1 mm to 3 mm, but is not limited thereto.

The first adhesive portion 142 should be easy to separate when the display panel 110 and the cover unit 120 are adhered to each other and serve as a buffer against warping of the display panel 110 in the environmental reliability evaluation. Accordingly, the first adhesive portion 142 has a relatively soft characteristic. On the other hand, since the second adhesive portion 144 is exposed to the outside, the second adhesive portion 144 has a relatively hard characteristic in order to prevent the appearance of the adhesive portion 144 and scratch.

The storage modulus of the first adhesive portion 142 is smaller than that of the second adhesive portion 144 and the hardness of the second adhesive portion 144 is larger than that of the first adhesive portion 142, The elongation of the second adhesive portion 144 is preferably larger than the elongation of the second adhesive portion 144.

For example, the storage modulus of the first adhesive portion 142 may be less than 10 ⁵ Pa and the storage modulus of the second adhesive portion 144 may be greater than 10 ⁷ Pa, but is not limited thereto. It is preferable that the hardness of the second adhesive portion 144 is not less than 30 and the elongation of the first adhesive portion 142 is not less than 300%.

On the other hand, the first adhesive portion 142 may include a pigment and / or a dye to realize a particular color. On the other hand, the second adhesive portion 144 does not include a pigment or a dye and is transparent. The first and second adhesive portions 142 and 144 are formed by applying a resin composition and then curing using UV. Since the relatively thick second adhesive portion 144 may not be completely cured when opaque, The second adhesive portion 144 is preferably transparent. In addition, when the second adhesive portion 144 includes a pigment or a dye, a color drop phenomenon occurs due to environmental reliability evaluation, external contact, or the like, and a desired color can not be realized.

The resin composition of the first and second adhesive portions 142 and 144 includes an oligomer and a monomer, a photo-initiator, and other additives. Here, the resin composition preferably has a viscosity of 20,000 cp to 40,000 cp.

As the oligomer, trifunctional urethane acrylate, 6-functional urethane acrylate and bifunctional epoxy acrylate may be used, and these may be used alone or in combination of two or more.

As the trifunctional urethane acrylate, an aliphatic urethane triacrylate may be used. As the hexafunctional urethane acrylate, an aliphatic urethane hexaacrylate may be used, and a bifunctional epoxy As the acrylate, bisphenol A epoxy diacrylate may be used, but it is not limited thereto.

Examples of the monomer include 2-phenoxyethyl acrylate, isobornyl acrylate, pentaerythritol triacrylate, and 1,6-hexanediol diacrylate (1,6 -hexanediol diacrylate), and the like, or a combination of two or more thereof.

As the photoinitiator, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide or bis (2,4,6-trimethylbenzoyl) -phenyl-phosphine oxide (bis (2 , 4,6-trimethylbenzoyl) -diphenyl-phosphine oxide) may be used alone or in combination, but the present invention is not limited thereto.

Other additives include N, N-dimethyl acrylamide, 4-acryloyl morpholine, N-vinyl caprolactam, N-vinyl acrylate, N-vinylpyrrolidone, hexanediol diacrylate, ethoxylated (30) bisphenol A diacrylate, octadecyl 3- (3,5-di Octadecyl-3- (3,5-di-tertbutyl-4-hydroxyphenyl) -propionate), which may be used singly or in combination of two or more kinds. And is not limited to these.

Here, the resin composition of the first adhering portion 142 contains more trifunctional urethane acrylate than the resin composition of the second adhering portion 144, and contains fewer hexafunctional urethane acrylate.

For example, the first adhesive portion 142 may be formed of a mixture of 60 wt% of aliphatic urethane triacrylate and 7 wt% of aliphatic urethane hexaacrylate, 5 wt% of bisphenol A epoxy diacrylate, 10 wt% of 2-phenoxyethyl acrylate, 3 wt% of 2,4,6-trimethylbenzoyldiphenylphosphine oxide, 3 wt% of N, N-dimethylacrylamide, 5 wt% of hexanediol diacrylate, 6.5 wt% of ethoxylated (30) bisphenol A (3,5-di-tert-butyl-4-hydroxyphenyl) -propionate and 0.5 wt% of octadecyl 3- Is a mixture of 10 wt% aliphatic urethane triacrylate, 45 wt% aliphatic urethane hexaacrylate, 20 wt% bisphenol A epoxy diacrylate, 11.5 wt% pentaerythritol triacrylate, 3 wt% 2,4,6-trimethylbenzoyl Diphenylphosphine oxide, 5 wt% N, N-dimethylarc Amide, 5 wt% of hexanediol diacrylate, and 0.5 wt% of octadecyl 3- (3,5-di-tert-butyl-4-hydroxyphenyl) -propionate .

As described above, in the display device according to the embodiment of the present invention, the weight and thickness of the display device can be reduced by fixing the display panel 110 to the cover unit 120 using the adhesive member 140, Can be reduced.

Since the adhesive member 140 of the present invention includes the first adhesive portion 142 and the second adhesive portion 144 having different physical properties and the first and second adhesive portions 142 and 144 are formed using the resin composition, The cost can be reduced as compared with the adhesive tape.

In addition, by applying the adhesive member 140 to the outer surface of the display device without a separate component, it is possible to realize a light and thin design different from the conventional one. At this time, the first adhesive portion 142 can provide a display device of various designs by implementing a specific color including pigments and / or dyes if necessary.

In addition, in the display device according to the embodiment of the present invention, the display panel 110 and the cover unit 120 are bonded together by the first bonding portion 142 having a relatively low storage modulus and a high elongation at the time of environmental reliability evaluation under a certain temperature, The delamination of the adhesive member 140 can be prevented.

Further, when the adhesive member 140 is formed, defective coating due to air bubbles occurs at a portion adjacent to the gap holding member 130. In the case of defective coating, only the first adhesive portion 142 needs to be removed, .

On the other hand, since the second adhesive portion 144 exposed to the outside has a relatively high hardness, it is possible to prevent the appearance from being pressed or scratched.

Hereinafter, a manufacturing process of a display device according to an embodiment of the present invention will be described with reference to the drawings.

4A to 4F are cross-sectional views schematically showing a manufacturing process of a display device according to an embodiment of the present invention.

First, as shown in FIG. 4A, a cover unit 120 having a first portion 122 and a second portion 124 and having a hemming structure is prepared, and a second portion 124 of the cover unit 120 The gap holding member 130 is disposed. The gap holding member 130 has adhesion to the bottom surface and is adhered to the second portion 124 of the cover unit 120.

Next, as shown in FIG. 4B, the display panel 110 having the side sealing portion 112 formed on the side thereof is prepared, and the display panel 110 is arranged on the gap holding member 130. Next, as shown in FIG.

Next, as shown in Fig. 4C, the first resin composition is applied between the display panel 110 and the second portion 124 of the cover unit 120 so as to surround the gap holding member 130, and then UV And the first bonded portion 142a is formed by curing the applied first resin composition. The first adhesive portion 142a contacts the lower surface of the edge of the display panel 110 and the upper surface of the second portion 124 of the cover unit 120 to fix the display panel 110 and the cover unit 120.

The first adhesive portion 142a may be spaced apart from the side sealing portion 112 on the side of the display panel 110. [ Alternatively, the first adhesive portion 142a may contact and / or overlap with a portion of the side sealing portion 112.

However, when applying the first resin composition, air bubbles may be generated, or the position of the display panel 110 and the cover unit 120 may be displaced.

Therefore, as shown in FIG. 4D, the first bonding portion (142a in FIG. 4D) is removed to separate the display panel 110 and the cover unit 120 from each other. At this time, since the first bonding portion (142a in FIG. 4D) has a relatively soft characteristic and a large elongation, the display panel 110 and the cover unit 120 can be easily separated without failures. In other words, the first bonding portion (142a in FIG. 4D) separates a part from the display panel 110 and the cover unit 120 and removes the remaining portion. The first bonding portion (142a in FIG. 4D) So that the residue of the first bonding portion (142a in FIG. 4D) is not left on the display panel 110 and the cover unit 120. As shown in FIG.

Since the first bonding portion (142a in Fig. 4D) contacts and / or overlaps the side sealing portion 112 or a portion of the side sealing portion 112, the first bonding portion Only the 142a in Fig. 4D can be removed.

Next, as shown in Fig. 4E, the display panel 110 is again placed on the gap holding member 130, and the first resin composition is coated and cured to form the first adhesive portion 142 again. The re-formed first adhesive portion 142 contacts the lower surface of the display panel 110 and the upper surface of the second portion 124 of the cover unit 120 to fix the display panel 110 and the cover unit 120.

4F, when defects such as the generation of bubbles in the first adhesive portion 142 or the displacement of the display panel 110 and the cover unit 120 do not occur, The second resin composition is coated on the outer side and then the second resin composition coated with UV is cured to form a second adhesive portion 144 that contacts the first adhesive portion 142. [

At this time, the second adhesive portion 144 is in contact with the side surface of the display panel 110 where the side sealing portion 112 is located and the upper surface of the second portion 124 of the cover unit 120. The second adhesive portion 144 can completely cover the side sealing portion 112.

Since the second adhesive portion 144 is exposed to the outside, the second adhesive portion 144 has a hardness equal to or higher than the Shore D 30, thereby preventing the appearance of the second adhesive portion 144 and scratching.

On the other hand, when the second resin composition is applied, if the adhesion failure occurs due to the occurrence of bubbles or the like, the first adhesive portion 142 is removed together with the second adhesive portion 144 to separate the display panel 110 and the cover unit 120 And the steps of Figs. 4E and 4F are performed to form the first and second adhesive portions 142 and 144 again.

As described above, in the present invention, the display panel 110 and the cover unit 120 are attached to each other using the first and second adhesive portions 142 and 144 having different physical properties, thereby reducing the occurrence of defective coating due to bubbles or the like . In addition, the coating failure mainly occurs adjacent to the gap holding member 130, but only the first bonding portion 142 needs to be removed when the coating failure occurs, so that the separation between the display panel 110 and the cover unit 120 is facilitated And it is possible to prevent the side sealing portion 112 from being damaged. In addition, since the display panel 110 and the cover unit 120 can be separated without being damaged, the display panel 110 and the cover unit 120 can be recycled to increase the productivity and reduce the cost.

In the above embodiment, the cover unit has a hemming structure. However, the cover unit may have a different structure. The structure of the cover unit of the present invention will be described in more detail with reference to the drawings.

5A to 5C are cross-sectional views schematically showing a display device according to another embodiment of the present invention. The structure except for the cover unit is the same as the previous embodiment, and the same parts are denoted by the same reference numerals and description thereof Is abbreviated or abbreviated.

5A to 5C, a display device according to another embodiment of the present invention includes a display panel 110 having a side sealing portion 112 formed on a side surface thereof, a display panel 110 disposed on a back surface side of the display panel 110, A gap holding member 130 between the display panel 110 and the cover units 320, 420 and 520 and an adhesive member 140 outside the gap holding member 130 do. The adhesive member 140 includes a first adhesive portion 142 surrounding the gap holding member 130 and a second adhesive portion 144 outside the first adhesive portion 142. [

The cover unit 320 according to another embodiment of the present invention may have an inner bending structure in which the end portion is curved inward as shown in FIG. 5A.

More specifically, the cover unit 320 includes first, second, and third portions 322, 324, and 326. The first portion 322 has a plate shape corresponding to the back surface of the display panel 110 and the second portion 324 is parallel to and overlapped with the first portion 322 and the third portion 326 overlaps the first And connects the portion 322 and the second portion 324.

Components such as a driving unit, a heat dissipating member, an auxiliary plate and / or a backlight unit may be disposed between the display panel 110 and the first portion 322 of the cover unit 320. Depending on the type and thickness of the component, The distance between the display panel 110 and the first portion 322 can be adjusted by adjusting the length of the third portion 326.

Here, the third portion 326 is bent substantially vertically upward from the first portion 322, and the second portion 324 is bent substantially vertically inwardly from the third portion 326. At this time, the portion where the third portion 326 and the first portion 322 meet and the outer surface of the portion where the third portion 326 and the second portion 324 meet form a curved surface. Accordingly, by exposing the cover unit 320 to the outside without a separate component, it is possible to provide a display device having differentiated and excellent design, and it is possible to prevent the user from being injured by angled corners.

Alternatively, the cover unit 420 according to another embodiment of the present invention may have an outer bending structure in which the end portion is curved outward as shown in FIG. 5B.

More specifically, the cover unit 420 includes first, second, and third portions 422, 424, and 426. The first portion 422 has a plate shape corresponding to the back surface of the display panel 110 and the second portion 424 is parallel and spaced apart from the first portion 422, And connects the portion 422 and the second portion 424.

Components such as a driving unit, a heat dissipating member, an auxiliary plate and / or a backlight unit may be disposed between the display panel 110 and the first portion 422 of the cover unit 420. Depending on the type and thickness of the component, The distance between the display panel 110 and the first portion 422 can be adjusted by adjusting the length of the third portion 426.

Here, the third portion 426 is bent substantially vertically upward from the first portion 422, and the second portion 424 is bent substantially perpendicularly outwardly from the third portion 426. At this time, the portion where the third portion 426 and the first portion 422 meet and the outer surface of the portion where the third portion 426 and the second portion 424 meet form a curved surface. Thus, by exposing the cover unit 420 to the outside without a separate component, it is possible to provide a display device having differentiated and excellent design, and to prevent the user from being injured by the angled edge.

On the other hand, a buffer part 428 may be further formed on the side surface of the second part 424. The cushioning portion 428 is made of an elastic material to prevent damage to the display device due to an external impact and to prevent the user from being injured by angled corners by eliminating the edges of the exposed second portion 424 can do.

Alternatively, the cover unit 520 according to another embodiment of the present invention may include a cover portion 522 and a frame portion 524, as shown in Fig. 5C.

The cover portion 522 is disposed at a lower portion of the display panel 110 with a flat plate shape corresponding to the back surface of the display panel 110 and is provided between the display panel 110 and the cover portion 522, Shaped frame portion 524 is located. The cover portion 422 may be a back cover or a bottom cover, and the frame portion 524 may be a middle frame or a middle cabinet. The cover portion 522 may further include a side surface in addition to the horizontal surface in the form of a flat plate. In addition, the frame portion 524 may include a horizontal portion and a vertical portion, and may have an A-shaped cross-section.

The first gap holding member 130 is positioned between the display panel 110 and the frame portion 524 and more specifically between the display panel 110 and the horizontal portion of the frame portion 524, And the frame portion 524 are fixed through the adhesive member 140 formed outside the first gap holding member 130. [ The first gap holding member 130 may be a single-sided adhesive tape having an adhesive property on one side thereof, and the adhesive surface may contact the frame portion 524.

A second gap holding member 560 is disposed between the cover portion 522 and the frame portion 524 and more specifically between the cover portion 522 and the horizontal portion of the frame portion 524. The second gap retaining member 560 may be a single-sided tape having an adhesive property on one side, and a surface having adhesive property may contact the cover portion 522. [ In this case, the cover portion 522 and the frame portion 524 can be fixed using fixing means (not shown) such as screws.

Alternatively, the second gap retaining member 560 may be a double-sided tape having adhesive properties on both sides. In this case, the cover portion 522 and the frame portion 524 may be fixed to each other without a separate fixing means Can be fixed.

As described above, the structure of the adhesive member 140 of the present invention can be applied to cover units 320, 420, 520 having various structures.

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

100: display device 110: display panel
112: side sealing portion 120: cover unit
122: first part 124: second part
130: Adhesive member 140: Adhesive member
142: first bonding portion 144: second bonding portion

Claims (9)

A display panel for displaying an image;
A cover unit under the display panel;
A gap holding member between the display panel and the cover unit;
An adhesive member which is located outside the gap holding member and adheres the display panel and the cover unit
Lt; / RTI >
Wherein the adhesive member includes a first adhesive portion and a second adhesive portion outside the first adhesive portion.
The method according to claim 1,
Wherein a storage modulus of the first bonding portion is smaller than that of the second bonding portion.
The method according to claim 1,
And the elongation of the first bonding portion is larger than that of the second bonding portion.
The method according to claim 1,
And the strength of the second bonding portion is larger than that of the first bonding portion.
The method according to claim 1,
Wherein the first bonding portion includes a pigment or a dye, and the second bonding portion is transparent.
6. The method of claim 5,
And the second bonding portion is thicker than the first bonding portion.
The method according to claim 1,
Wherein the first adhesive portion is in contact with the lower surface of the display panel and the upper surface of the cover unit.
8. The method of claim 7,
And the second adhesive portion is in contact with a side surface of the display panel and an upper surface of the cover unit.
8. The method of claim 7,
Wherein a side sealing portion is formed on a side surface of the display panel and the first bonding portion is spaced apart from the side sealing portion or overlaps with a part of the side sealing portion.

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