KR101444034B1 - Packaging film for display apparatus and display apparatus comprising the same - Google Patents

Abstract

The present application relates to a packaging film for a display device and a display device including the same. The present invention relates to a film for packaging a back surface element provided on the rear surface of a display panel, the film comprising: a first region located on the front surface of the rear surface element; And a second region extending from the first region, the second region being located on a side surface of the backside device, and a display panel including the packaging film. According to the present application, an improved display device can be realized.

Description

TECHNICAL FIELD [0001] The present invention relates to a packaging film for a display device, and a display device including the packaging film. [0002]

The present application relates to a packaging film for a display device capable of implementing an improved display device and a display device including the same.

The display device is useful for various electronic products and the like. For example, devices such as liquid crystal displays (LCDs) are used in various products such as mobile phones, personal digital assistants (PDAs), electronic game machines, monitors, and TVs.

The display device has a display panel for displaying an image. Further, most of the display devices include backside elements provided on the back surface of the display panel. For example, a liquid crystal display (LCD) device includes a backlight unit (BLU) as a backside device.

1 is a cross-sectional view showing an example of a display device according to the related art, which specifically shows a liquid crystal display (LCD) device.

Referring to Fig. 1, a liquid crystal display (LCD) device has a liquid crystal display panel 10 for displaying an image. Generally, the liquid crystal display panel 10 can not emit light itself, and receives light from the outside to realize an image. Accordingly, a backlight unit 20 is provided on the back surface of the liquid crystal display panel 10 as a back surface element.

The backlight unit 20 includes a light source 22 such as a light emitting diode (LED) and a light source 22 for guiding the light of the light source 22 to the liquid crystal display panel 10. [ And a diffusion sheet 26 for diffusing the light emitted from the light guide plate 24. The light guide plate 24 is provided with a light guide plate 24,

In addition, the liquid crystal display panel 10 has a liquid crystal cell layer 12 made of liquid crystal in which light transmittance is changed as an electrical signal is applied. The liquid crystal display panel 10 changes or keeps the polarization direction of the linearly polarized light passing through the liquid crystal according to the arrangement state of the liquid crystal, thereby transmitting or blocking the light. To this end, the liquid crystal display panel 10 has a front polarizer 14 formed on the upper part of the liquid crystal cell layer 12 and a back polarizer 16 formed on the lower part of the liquid crystal cell layer 12.

In addition, a conventional display device including a liquid crystal display (LCD) device and the like includes a molding frame 30 for assembling the respective components. 1, the backlight unit 20 is stacked on the back surface of the liquid crystal display panel 10 and then assembled and fixed through a molding frame 30 made of a resin material.

For example, Korean Patent No. 10-0824866, Korean Patent No. 10-0876236, Korean Patent No. 10-0876248, and Korean Patent No. 10-1178577 disclose techniques related to the above.

However, due to the use of the molding frame 30 as described above, the display device according to the related art has a bezel B and a large area of the bezel B as shown in Fig. There is a problem that a screen on which an actual image is displayed compared to the surface area of the liquid crystal display panel 10 due to the bezel B is reduced.

In addition, the display device according to the related art may have problems such as handling and assembling of the back surface element, that is, the backlight unit 20, and the like. Optical members such as the light guide plate 24 and the diffusion sheet 26 are inserted and fixed in the molding frame 30 and are stacked on the back surface of the liquid crystal display panel 10 and assembled through the molding frame 30 An excessive time is required in the process, and the optical members 24 and 26 may be damaged. In addition, the assembly through the molding frame 30 may have a poor sealability, and a shape of a light beam may be generated. Such a problem causes an increase in cost and yield of the display device, and may adversely affect performance.

Korean Patent No. 10-0824866 Korean Patent No. 10-0876236 Korean Patent No. 10-0876248 Korean Patent No. 10-1178577

Accordingly, the present application provides a packaging film for a display device capable of implementing an improved display device and a display device including the same.

The present application provides a packaging film for a display device capable of minimizing a bezel area, for example, and a display device including the packaging film.

In order to achieve the above object,

A first region corresponding to a front surface of a rear surface element provided on a rear surface of the display panel; And

And a second region extending from the first region and corresponding to a side surface of the rear surface element.

According to an exemplary embodiment, the packaging film further comprises a third region extending from the second region and corresponding to a backside of the backside element. For example, the first region is light transmissive and the second region is light-permeable. The third area has, for example, an overlap prevention processing section.

In addition,

A display panel;

A rear surface element provided on a rear surface of the display panel;

A packaging film for packaging the backside element; And

And a pressure-sensitive adhesive layer formed between the display panel and the packaging film. The packaging film is attached to the back surface of the display panel through the pressure-sensitive adhesive layer by packaging the back surface element.

The back surface element includes, for example, an optical element. The optical element includes, for example, a light guide plate for converting a point light source emitted from a light source into a surface light source; And a diffusion sheet for diffusing the light emitted from the light guide plate. Further, the optical element may further include, for example, a light source.

According to an exemplary embodiment, a barrier layer is formed on a side surface of the display panel. The barrier layer may have at least a moisture barrier property. The barrier layer may include at least one selected from, for example, a moisture barrier resin layer, a metal thin film layer, and a vapor deposition layer.

According to the present application, an improved display device can be realized. For example, the bezel area can be minimized. Further, in the manufacturing (assembling) process of the display device, the damage of the components can be prevented, and the process can be simplified.

1 is a cross-sectional view showing an example of a conventional display device.
2 is a cross-sectional view of a display device according to the first embodiment.
3 is a cross-sectional view of the display device according to the second embodiment.
4 is a cross-sectional view of the display device according to the third embodiment.
5 is a plan view (developed view) showing a first embodiment of a packaging film for a display device.
6 is a cross-sectional view taken along line A-A 'in FIG.
7 is a plan view (developed view) showing a second embodiment of a packaging film for a display device.
8 is a plan view (developed view) showing a packaging film for a display device according to a third embodiment.
9 is a plan view (developed view) showing a fourth embodiment of a packaging film for a display device.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

2 to 4 show exemplary embodiments of a display device according to the present application. 5 to 9 show exemplary embodiments of a packaging film for a display device according to the present application.

In the drawings, the same reference numerals as used in the appended drawings denote the same elements in the drawings.

The terms "first "," second ", "third ", and the like are used herein to distinguish one element from another, no. In this specification, the terms indicating directionality, "front", "side", "rear" and the like refer to a direction in which the display device is viewed from an observer (viewer) side unless otherwise specified. 2, an observer (viewer) is positioned above the display panel 100 and looks at the display panel 100. As shown in FIG.

In the present specification, the meaning of "correspondence" includes those corresponding to some or all of the surfaces facing each other. As used herein, "light transmission" may mean that the irradiated visible light has a transmittance above a straight line, for example greater than or equal to 60%, for example greater than or equal to 80%, for example greater than or equal to 90%. As used herein, "light pulsed transmission" may mean that the visible light being irradiated has a transmittance on a straight line of, for example, not more than 40%, for example not more than 30%, for example not more than 20%, for example not more than 10% have.

In the present specification, the terms "formed on top," " formed on the bottom, " and "formed on the side surface" mean only laminated in contact with the member and other members are formed between the members do.

The present application provides a packaging film for a display device, for example, a packaging film for a backside device and a display device including the same. A packaging film for a display device according to the present application (hereinafter, abbreviated as a 'packaging film') packages the backside device 200 installed on the backside of the display panel 100. The packaging film 300 encapsulates at least the front surface 201 and the side surface 202 of the backside element 200 to be packaged. The packaging film 300 includes a first region 310 corresponding to the front surface 201 of the rear element 200 and a second region 320 corresponding to the side surface 202 of the rear element 200 . The second region 320 extends from the first region 310.

Further, the display device according to the present application includes the packaging film 300 of the present application as described above. Specifically, the display device according to the present application includes a display panel 100; A backside element 200 installed on a rear surface of the display panel 100; A packaging film 300 for packaging the backside element 200; And a pressure sensitive adhesive layer 400 formed between the display panel 100 and the packaging film 300.

According to the present application, an improved display device can be realized. For example, the packaging film 300 and the pressure-sensitive adhesive layer 400 attach and fix the display panel 100 and the back-surface element 200 to minimize a bezel area. That is, according to the present application, the use of the molding frame 30 (see Fig. 1) is excluded, and a display device having almost no bezel can be realized. Further, problems that may occur in handling and assembling of the back surface element 200, for example, an optical element on a film (or sheet), etc., are improved.

Hereinafter, exemplary embodiments of the present application will be described with reference to the accompanying drawings. In explaining the present application, the packaging film 300 of the present application will be described together with the description of the display device according to the present application.

2 to 4, a display device according to the present application includes a display panel 100, a rear element 200 provided on the rear surface of the display panel 100, A packaging film 300 for packaging the display panel 200 and a pressure sensitive adhesive layer 400 for attaching and fixing the display panel 100 and the packaging film 300.

In the present application, the display panel 100 is not particularly limited. The display panel 100 may be any one capable of displaying an image.

The display panel 100 may include an element that displays an image by changing the light transmittance, for example, or an element that emits light to display an image. The display panel 100 may include a liquid crystal display panel (LCD Panel) for displaying an image through a liquid crystal whose light transmittance is changed, for example; A plasma display panel (PDP) in which a gas discharge occurs between two electrodes, and a phosphor emits light by ultraviolet rays generated by the gas discharge to display an image; And an organic electroluminescent display panel in which an organic light emitting diode (OLED) emits light to display an image by electrical excitation applied from an electrode.

2 to 4 illustrate an exemplary form of the display panel 100. In FIG. Figures 2-4 specifically illustrate a liquid crystal display (LCD) panel.

2 to 4, the display panel 100 includes at least one liquid crystal cell layer 120 and a polarizer formed on both sides of the liquid crystal cell layer 120, A front polarizer 140 formed on the upper portion of the liquid crystal cell layer 120 and a back polarizer 160 formed on the lower portion of the liquid crystal cell layer 120.

The liquid crystal cell layer 120 may include a thin film transistor (TFT) substrate, a color filter substrate facing the TFT substrate, and a liquid crystal layer interposed between the two substrates. And may include a liquid crystal cell in which a light transmittance is changed as an electrical signal is applied.

The front (upper) polarizing plate 140 and the rear (lower) polarizing plate 160 may have polarizing properties, and their optical axes may be orthogonal to each other. For example, the optical axis of the front polarizer 140 may be the longitudinal direction of the display panel 100, and the optical axis of the back polarizer 160 may be the lateral direction of the display panel 100. In addition to these, a pixel electrode or the like for driving a pixel is formed in the display panel 100, and is not shown in the drawing.

The display panel 100 may further include a functional film or layer other than the liquid crystal cell layer 120, the front polarizer 140, and the back polarizer 160. For example, a light diffusion layer, a viewing angle compensation film, a retardation film, an antireflection layer, an antiglare layer and / or a protective film layer for protecting them. These films or layers may be formed on the front polarizer 140 or the back polarizer 160, for example. For example, at least one selected from a light diffusion layer, an antireflection layer, an anti-glare layer, and a protective film layer for protecting them may be formed on the front polarizing plate 140. They may be laminated on the front polarizer 140 as a separate member, or formed directly on the upper surface of the front polarizer 140. For example, the anti-glare layer may be formed directly on the upper surface of the front polarizer 140 through a surface treatment such as a haze treatment.

In the present application, the back surface element 200 is not particularly limited as long as it is provided on the back surface of the display panel 100. The backside element 200 may be composed of one member or may have a multi-layer structure including two or more members. The shapes and functions of the members constituting the back surface element 200 are not limited. The backside element 200 may have, for example, a film, sheet, plate, and / or shape of a three-dimensional device. For example, the backside element 200 may include an electric / electronic element having an electric / electronic function; An optical element having an optical function; And / or a heat dissipation element having a heat dissipation function. The backside element 200 is wrapped and packaged by the packaging film 300 as described later.

2 illustrates an example of a backside element 200 constituted by one member. At this time, the back surface element 200 shown in FIG. 2 can be selected from, for example, the optical element 200A, the electronic circuit board, the heat sink, and the like. As a specific example, the backside element 200 can be selected from the optical element 200A.

In the present application, the optical element 200A is not limited as long as it has an optical function. The optical element 200A may be, for example, an element having functions such as light diffusion, light collection, polarization, and / or reflection, but is not limited thereto. Further, the optical element 200A may include a light source that generates light. In the present application, optical element 200A includes a light source for generating light and / or any kind of apparatus, film or sheet used for processing light.

The optical element 200A may be at least one selected from a light guide plate, a diffusion sheet, a brightness enhancement film, a prism film, a lens film, a polarizing film, a reflection film, a viewing angle compensation film, a retardation film, And may include an optical member 200a. In addition, the optical element 200A may be selected from a light source assembly that further includes a light source 240 in the optical member 200a. At this time, the specific form of the light source assembly is not particularly limited, and may be selected from, for example, conventional direct type or edge type light source assemblies. As a specific example, the light source assembly as optical element 200A can be selected from a backlight unit (BLU) commonly used in liquid crystal display (LCD) devices.

In Figs. 3 and 4, a multilayered optical element 200A is illustrated as the backside element 200. Fig. 3 shows an optical element 200A including a plurality of optical members 200a and FIG. 4 includes a plurality of optical members 200a and a light source 240 The optical element 200A shown in Fig.

Referring to FIG. 3, the optical element 200A includes an optical member 200a, which includes a light guide plate 210 for converting a point light source emitted from a light source into a surface light source; And a diffusing sheet 220 formed on the light guide plate 210 and diffusing light emitted from the light guide plate 210. In addition, the optical element 200A may further include a brightness enhancement film 230 formed on the diffusion sheet 220. Each of the optical members 200a may be formed of one layer or two or more layers. 3 illustrates a case where the brightness enhancement film 230 is formed in two layers. Such an optical element 200A is packaged by the packaging film 300 as shown in FIG. 3, and is installed on the rear surface of the display panel 100. 3, the light source for supplying the light to the light guide plate 210 is not shown, but the light source may be separately provided outside the light guide plate 210 to supply light to the light guide plate 210, for example.

4, the optical element 200A may be packaged by the packaging film 300 by forming a plurality of optical members 200a and the light source 240 in an assembly. Specifically, the optical element 200A is a light source assembly including a light source 240, which includes at least one light source 240; A light guide plate 210 formed on the light source 240 and converting the point light source emitted from the light source 240 into a surface light source; And a diffusion sheet 220 formed on the light guide plate 210 and diffusing light emitted from the light guide plate 210. As shown in FIG. 4, the optical element 200A may further include a brightness enhancement film 230 formed on the diffusion sheet 220. FIG.

In the present application, the light source 240 is not limited as long as it can emit light, and may be selected from, for example, a light emitting diode (LED) or the like.

The packaging film 300 packages the above-described back surface element 200, for example, the optical element 200A. At this time, in the case of the light source 240, it may not be packaged by the packaging film 300 as shown in FIG. 3, or may be packaged together with the optical member 200a as shown in FIG.

The packaging film 300 includes a first region 310 and a second region 320 extending from the first region 310. The first region 310 corresponds to the front surface 201 of the backside element 200 and the second region 320 corresponds to the side surface 202 of the backside element 200. In this case, The packaging film 300 further includes a third region 330, preferably for a rigid fixation of the backside element 200. The third region 330 extends from the second region 320 and corresponds to the backside 203 of the backside element 200. 5 to 9 illustrate exemplary embodiments of a packaging film 300. FIG.

At least a first region 310 and a second region 320 of the packaging film 300 have the same or similar area as the portion corresponding to the backside element 200, Lt; / RTI > For example, the area of the first area 210 is the same as or similar to the area of the front surface 201 (see FIG. 2) of the back-surface element 200, (See Fig. 2).

In addition, the second region 320 may be two or more. The second region 320 is, for example, two to four. That is, the second region 320 may extend from the first region 310 and may be formed on at least two of the four regions of the first region 310. In addition, the third area 330 may be, for example, two to four, which may be the same as the number of the second areas 320. For example, three second regions 320 are formed in FIG. 5, and a third region 330 is also shown in a similar manner.

In the present application, the packaging film 300 is not limited as long as it further includes the first region 310 and the second region 320, and preferably the third region 330 as described above. In addition, each of the regions 310, 320, and 330 may be integrally formed. The packaging film 300 is cut so that a single film has the regions 310, 320 and 330 as described above so that the regions 310, 320 and 330 are integrally formed .

The packaging film 300 may be selected from a resin film, and the kind of the resin film is not limited. The packaging film 300 may be formed of a material such as polycarbonate, polyester, polyolefin, cyclo-olefin polymer, acrylic, urethane, epoxy, polyamide, And derivatives thereof, and the like can be used. For example, the packaging film 300 may be a polycarbonate (PC) film, a polyethylene terephthalate (PET) film, a polyethylene naphthalate (PEN) film, a polybutylene terephthalate (PBT) film, a polybutylene naphthalate ) Film, a polyethylene (PE) film, a polypropylene (PP) film, a cyclic polyethylene (PE) film, a cyclic polypropylene (PP) film, an acrylic film, a triacetylcellulose (TAC) film and / But are not limited thereto. In addition, the films listed above may be stretched or non-stretched, and more specifically, for example, the packaging film 300 may be made of a non-oriented polycarbonate (PC) film or the like.

The packaging film 300 may have optical transparency. In addition, the packaging film 300 may have optical properties such as polarization, light condensation and / or diffusion depending on the case, and may have isotropy in some cases. At least the first region 310 may have this property. In this case, it may be useful for packaging of the optical element 200A.

In the present application, the isotropy means that there is only a phase difference that does not have a phase difference or is very small even in the presence of a phase difference and does not substantially affect the phase of light passing through the film.

The packaging film 300 may have a planar phase difference (Rin) of 10 nm or less, for example. The packaging film 300 may have a planar phase difference Rin calculated by, for example, the following equation (1): 10 nm or less, for example, 5 nm or less, specifically 0 to 5 nm, , 0.1 to 3 nm, 0.2 to 2, or 0.5 to 2 nm. Further, the packaging film 300 may have a thickness direction retardation (Rth) of 10 nm or less, for example. The packaging film 300 is a film having a thickness direction retardation Rth calculated by, for example, the following formula (2), for example, 10 nm or less, for example, 5 nm or less, 0 to 4 nm, 0.1 to 3 nm, 0.2 to 2, or 0.5 to 2 nm. In this application, the phase difference (Rin) (Rth) is an absolute value.

[Equation 1]

Rin = dx (nx - ny)

In the above Equation 1, Rin is the retardation in the plane direction, d is the thickness of the packaging film 300, nx is the refraction index in the slow axis direction of the packaging film 300 with respect to light having a wavelength of 400 to 600 nm, Axis refractive index of the packaging film 300 with respect to a wavelength of 400 to 600 nm.

&Quot; (2) "

Rth = dx (ny - nz)

Dy is the thickness of the packaging film 300, ny is the refractive index in the fast axis direction of the packaging film 300 with respect to light having a wavelength of 400 to 600 nm, nz is the refractive index in the fast axis direction of the packaging film 300, Is the refractive index in the thickness direction of the packaging film 300 with respect to the wavelength of 400 to 600 nm.

The packaging film 300 may be made of, for example, a non-oriented polycarbonate film, a non-oriented polyester film, a non-oriented acrylic film, a non-oriented triacetylcellulose film, and / Polyolefin-based films, and the like.

When packaging the backside element 200, the regions 310, 320, and 330 are bent at the boundaries C1 and C2. In the drawing, the boundary lines C1 and C2 between the regions 310, 320 and 330 are indicated by dotted lines. At this time, each of the boundary lines C1 and C2 is shown for convenience of explanation, and it may be displayed substantially on the packaging film 300 or not.

In packaging the rear surface element 200 using the packaging film 300, for example, first the first area 310 is first positioned corresponding to the front surface 201 of the rear element 200, The second region 320 is bent in the first region C1 so that the second region 320 is positioned corresponding to the side surface 202 of the backside element 200. When the third region 330 is further included, the third region 330 may be bent at the second boundary line C2 so that the third region 330 may contact the rear surface 203 of the rear surface element 200, And then packaged.

According to one exemplary embodiment, the packaging film 300 and the backside element 200 may have mutual adhesion. The adhesive force may be, for example, at the contact interface of the film 300 and the element 200. The method of attaching the packaging film 300 and the back surface element 200 is not particularly limited and may be performed by, for example, applying a heat and / or optical laminating method. For example, the packaging film 300 may be heat-sealed and fused, or may be fused to each other by light irradiation to be mutually attached. At this time, the packaging film 300 may be adhered to the back-surface element 200 by, for example, at least one selected from the second region 320 and the third region 330. In the attachment through the laminating method, the irradiation condition of heat and light may be appropriately selected depending on the type of the packaging film 300, and is not particularly limited.

According to another exemplary embodiment, the packaging film 300 and the backside element 200 can be adhered to each other through separate attachment means. The attachment means may include, for example, a pressure-sensitive adhesive layer (not shown) formed between the packaging film 300 and the back-surface element 200. In order to distinguish the pressure sensitive adhesive layer from the pressure sensitive adhesive layer 400 formed between the packaging film 300 and the display panel 100, the second pressure sensitive adhesive layer is hereinafter referred to as a 'second pressure sensitive adhesive layer'.

The second pressure sensitive adhesive layer may be formed on the contact interface between the packaging film 300 and the back surface element 200 so as to provide a bonding force therebetween. The second pressure sensitive adhesive layer may be formed by coating the packaging film 300 and / or the backside element 200. For example, the second pressure sensitive adhesive layer may be formed on at least one selected from at least the second region 320 and the third region 330. More specifically, the second pressure sensitive adhesive layer is formed on the inner surface of at least the second region 320 and / or the third region 330 among the respective regions 310, 320 and 330 of the packaging film 300 .

As described above, the packaging film 300 and the back surface element 200 are bonded to each other by at least a second region 320 and a side surface 202 , And / or between the third region 330 and the backside 203. As shown in FIG.

Further, the attachment means may be, for example, a double-sided or one-sided adhesive tape. At this time, the double-sided adhesive tape may be interposed between the packaging film 300 and the backside element 200. More specifically, the double-sided adhesive tape may be interposed between the second area 320 and the side surface 202 and / or between the third area 330 and the back surface 203. [ In the case of the one-sided pressure-sensitive adhesive tape, for example, it may be taped at the outer surface of the third region 330 to provide a bonding force with the backside element 200.

Referring to FIGS. 5 and 6, a notch 350 may be formed on a boundary line C1 between the first and second regions 310 and 320. 6, when the packaging film 300 further includes the third region 330, the notch portion 350 may be formed as a boundary line between the second region 320 and the third region 330 C2. 6 is a sectional view taken on line A-A 'in Fig.

In the present application, the notch portion 350 may be such that the second region 320 and the third region 330 can be easily bended at each of the boundary lines C1 and C2. The notch portion 350 may be formed through a notch process that can generate a thickness step at, for example, the boundary lines C1 and C2. For example, the notch portion 350 may be selected from an osmosis treatment portion formed by pressing the boundary lines C1 and C2 and a half cutting portion formed by half-cutting the boundary lines C1 and C2 . In the present application, the half does not only mean half the thickness of the packaging film 300.

The notch 350 may be formed to a depth of, for example, 1/3 to 2/3 of the thickness of the packaging film 300 by ozone treatment or half cutting, but is not limited thereto. In addition, the notch 350 may be formed continuously along the boundary lines C1 and C2 or discontinuously formed at predetermined intervals. That is, the notch 350 may be formed discontinuously in the form of a dotted line as shown by the boundary lines C1 and C2. For example, the notch 350 may be selected from a plurality of fine holes drilled at predetermined intervals along the boundary lines C1 and C2. In the present application, Is not particularly limited as long as the regions 310, 320, and 330 are easily bended at each of the boundary lines C1 and C2.

In addition, each of the regions 310, 320, and 330 may have a bending strength of, for example, 1.0 gf to 10.0 gf at each of the boundary lines C1 and C2. This bending strength can be set by the notch 350. At this time, if the bending strength is less than 1.0 gf, it may be too easy to bend at the boundary lines C1 and C2 or overlap the areas 310, 320 and 330, which may make handling uncomfortable. If the bending strength exceeds 10.0 gf, the bending process may not be easy. In the present application, the bending strength may mean, for example, a value measured according to ASTM D790 or the like.

The thickness of the packaging film 300 is not particularly limited. The thickness of the packaging film 300 may be variously set in consideration of the bending workability of each of the regions 310, 320, and 330, the handling properties during packaging, and / or the film thickness of the film 300. According to an exemplary embodiment, the thickness of the packaging film 300 may satisfy the following equation (3) with the area of the first region 310. [

&Quot; (3) "

y [m] = x [m2] + a

In Equation 3, y is the thickness (unit: 占 퐉) of the packaging film 300, x is the area of the first region 310 (width x length, unit: m2, When the thickness of the packaging film 300 satisfies the above formula (3), the bending workability of each of the regions 310, 320, and 330, the handling property at the time of packaging And film thickness of the film 300. The thickness of the packaging film 300 may vary depending on the area of the first region 310. However, the thickness of the packaging film 300 may be, for example, 50 탆 to 500 탆, 60 탆 to 400 탆 , Or about 80 to 200 mu m.

The packaging film 300 may also have one or more properties selected from, for example, (a) a tensile modulus of at least 1,200 MPa, (b) a tensile strength of at least 40 MPa, and (c) . In the case of having such physical properties, the back surface element 200 can be packaged and favorably supported.

However, when the tensile modulus is less than 1,200 MPa or the tensile strength is less than 40 MPa, the supporting force of the back-surface element 200 may be insignificant. The upper limit of the tensile modulus and the tensile strength is not particularly limited. The packaging film 300 may have a specific tensile modulus of, for example, 1,200 to 5,000 MPa, 1,500 to 4,000 MPa, 1,800 to 3,000 MPa, 1,900 to 2,500 MPa, or 2,000 to 2,400 MPa. Further, the packaging film 300 may have a tensile strength of, for example, 40 to 200 MPa, 45 to 150 MPa, 50 to 100 MPa, or 55 to 75 MPa. In addition, if the elongation is less than 20%, for example, handling during packaging may be deteriorated. The upper limit of the elongation is not limited, but may be 200% or less, for example, in consideration of the supporting force of the rear element 200. In view of this, the packaging film 300 may have an elongation of, for example, 20% to 200%, 30% to 180%, 50% to 180%, or 80% to 150%.

The method of measuring the tensile modulus, tensile strength and elongation is not limited. For example, the tensile modulus and tensile strength can be measured according to a tensile tester commonly used in the field of film production. In the case of the elongation, for example, A is the initial gauge distance of the film 300 in the tensile tester, B is the gauge distance at the time of breaking after stretching, %) = (AB) / AX 100].

In addition, the packaging film 300 may have a small strain so as to secure a firm fixing force and durability. In the packaging film 300, for example, it is preferable that the strain E measured by the following formula (4) is 5% or less. The strain E is preferably as close to zero as possible.

&Quot; (4) "

E (%) = [(L2 - L1) / L1] X 100

L 1 is the initial length (width or length) of the packaging film 300 and L 2 is the length of the packaging film 300 after being left for 24 hours with a load of 3 kg at a temperature of 80 캜. . The packaging film 300 has a stretchability of 2 mm or more when left for 24 hours with a load of 3 kg at a temperature of 80 캜, for example, on the basis of a size of 60 x 25 mm (width x length) Or less.

In addition, the packaging film 300 may have an endurance strength of, for example, at least 200 times, at least 300 times, or at least 400 times of an endurance index (MIT) measured by a test prescribed in JIS P8115 Lt; / RTI >

Referring to FIG. 5, the third area 330 may be formed with an overlap prevention processing unit 360. That is, when the third area 330 is bent and attached to the back surface 203 of the rear surface element 200, the third area 330 is provided with the overlap prevention processing section 330 so that the adjacent third areas 330 do not overlap with each other, (360) may be formed.

The overlap prevention processing unit 360 can be selected from the cut-out portion 361 cut at a predetermined angle?, For example. At this time, the angle [theta] of the chamfered portion 361 may be, for example, from 15 degrees to 85 degrees, or from 30 degrees to 60 degrees. More specifically, for example, the angle? Of the incised portion 361 may be 30 degrees or more, or 45 degrees or more. The overlapping portion 361 can be prevented from overlapping with the adjacent third region 330. The angle? Of the cut-out portion 361 in the present application means the side inclination angle of the third region 360 with reference to the straight line extending line of the second region 320 as shown in Fig. 5 .

7 shows another embodiment of the overlap prevention processing unit 360. The overlap prevention processing unit 360 shown in Fig. Referring to FIG. 7, the overlap prevention processing unit 360 can be selected from the cut portion 362 cut and removed to a predetermined length L. FIG. At this time, the length L of the cutting portion 362 may be equal to or greater than the width W ₃₃₀ of the adjacent third region 330, for example. This overlapping with the third area 330 adjacent to the cutting area 362 can also be prevented.

Also, according to an exemplary embodiment, at least the first region 310 among the respective regions 310, 320, and 330 may have light transmittance (transparency). The first region 310 may have light transmittance of, for example, 80% or more, specifically 90% or more of light transmittance, for example. In this case, it is advantageous in packaging the optical element 200A.

In addition, in the second region 320 and the third region 330, at least the second region 320 may have light-transparency. That is, it is preferable that the second region 320 has a light-transmitting property so that light leakage to the side is prevented. The second region 320 may have a light transmittance of, for example, 10% or less, 5% or less, 1% or less, 0.1% or less, or 0%. In addition, in the present application, the light-transmittance includes the meaning of light shielding for blocking light, and reflection for reflecting light. For this light-permeability, at least the second region 320 may comprise at least one light-scattering layer selected from, for example, a light-shielding layer and a reflective layer. Also in the case of the third region 330, it may have the above-mentioned light-transparency.

The light shielding layer may be formed by coating a light shielding material on the second region 320, for example. In addition, the reflective layer may be formed by coating a reflective material on the second region 320, for example. In this application, the term "coating" includes general coatings such as bar coating or spray coating as well as coating methods such as printing or deposition, as well as general coatings .

The materials constituting the light-shielding layer and the reflective layer are not particularly limited. As the light-shielding material, for example, a material having a color such as black can be used. Specific examples of the light-blocking material include inorganic materials selected from carbon black, graphite, iron oxide, azo-based pigment and / or phthalocyanine- And the like. Further, the reflective material may be a reflective material such as a metal selected from aluminum, titanium, silica, alumina, and / or titania, and a metal oxide, for example. These light-shielding and reflective materials may be coated by a printing process in combination with, for example, a binder and / or a solvent. And in the case of metal and metal oxides for reflectivity, can be deposited through deposition.

Referring to FIG. 8, a photodeflective processing unit 314 may be formed at the edge of the first region 310. 8, the first region 310 has a main region 312 of light transmittance (transparency), and a light-permeable treatment portion 314 is formed along the periphery of the main region 312 . The light-permeable treatment portion 314 may have a light-permeable property (light-shielding ability), which may be selected, for example, from a print layer formed by printing a light-permeable paint. In addition, the light-transmittance treatment section 314 may be selected from the light-shielding layer and the reflective layer as described above. For example, the light-transparency treatment unit 314 may be formed by coating a light-shielding material (colored material) such as an inorganic material and an organic material selected from carbon black, graphite, iron oxide, azo-based pigment and phthalocyanine-based pigment.

In the case where the light-emitting unit 314 is formed at the magnetic field of the first region 310 as described above, it is possible to completely block the light leakage to the side. The second region 320 may be light-permeable so that the light leakage to the side is prevented. However, when bending the packaging film 300, for example, the second region 320 may not be accurately bent at the boundary lines C1 and C2, A light ray may be generated on the side surface. In addition, in the process of packaging the packaging film 300, the first region 310 may be offset to one side so that the edge of the first region is located on the side surface 202 of the optical element 200A, . In such a case, the light-permeable treatment unit 314 can cut off the light to the side by blocking the light.

The thickness and the width W ₃₁₄ of the light-permeable treatment portion 314 are not particularly limited. The width W ₃₁₄ may be, for example, 0.05 mm or more. At this time, when the width W ₃₁₄ is less than 0.05 mm, the tolerance prevention function may be insignificant. The upper limit is not particularly limited, but if the width W ₃₁₄ is excessively large, the screen may be excessively clogged. For example, the upper limit is preferably 10 mm or less. In consideration of this point, the light-transmitting portion 314 may have a width (W ₃₁₄ ) of, for example, 0.05 mm to 5 mm, and more specifically a width W ₃₁₄ of 0.1 mm to 3.0 mm . The area of the photodiode 314 may be, for example, 0.01 to 5% of the total area of the first area 310, more specifically 0.5 to 2%.

Referring to FIG. 9, according to an exemplary embodiment, the first region 310 may be provided with a protrusion 315 in which the second region 320 is not extended. 9, the second region 320 may be formed to extend from the first region 310 and have a step 316 without extending from the vertex 310a of the first region 310. In other words, So that the first region 310 may be provided with the protrusion 315. That is, the vertex 310a of the first region 310 may protrude.

In the case where the protrusion 315 is provided as described above, that is, when the first region 310 is provided with the protrusion 315 that does not extend the second region 320, Can be prevented. The thickness of the first region 310 may be different from that of the first region 310 when the second region 320 is bent in the absence of the protrusion 315 as shown in FIG. Stress may be exerted and lifting may occur. When the projecting portion 315 is provided, the lifting phenomenon as described above can be prevented.

2 to 4, the packaging film 300 is attached and fixed to the display panel 100 through a pressure-sensitive adhesive layer 400.

According to an exemplary embodiment, the front surface of the packaging film 300 may be easily adhered to the surface. Specifically, adhesion can be easily handled at least on the front surface of the first area 310, that is, the surface (upper surface in the drawing) contacting with the pressure-sensitive adhesive layer 400. [ In the present application, the easy-to-attach treatment is not limited as long as it can improve the adhesion of the packaging film 300 and the pressure-sensitive adhesive layer 400. This adhesion facilitating treatment improves the adhesion at the contact interface between the packaging film 300 and the pressure-sensitive adhesive layer 400, which ultimately increases the fixing force between the display panel 100 and the packaging film 300.

The easy-to-attach treatment may include at least one selected from, for example, corona treatment and primer treatment. The manner of the corona treatment and the primer treatment is not particularly limited, and they can be applied to any known method for improving adhesion in the field of film processing. For example, the primer treatment may include a method of forming a primer layer by coating primers such as acrylic, urethane, and epoxy. The primer layer may have a thickness of, for example, 0.1 to 50 탆.

In addition, the back surface of the packaging film 300 may have an uneven surface. Concretely, at least the uneven surface may be formed on the back surface of the first region 310, that is, the surface (lower surface in the drawing) contacting with the back surface element 200. This uneven surface can prevent fusion of the first area 310 and the back surface element 200 after packaging. More specifically, referring to FIG. 3, fusion between the back surface (lower surface in the drawing) of the first region 310 and the front surface (upper surface in the drawing) of the brightness enhancement film 230 can be prevented.

The uneven surface may be formed in various ways, and may be formed, for example, by a mat process and a haze process. Through such processing, the roughness of the uneven surface, for example, RMS roughness may be 0.1 탆 or more, 0.5 탆 or more, or 1.0 탆 or more. For example, it may be a surface having a thickness of 0.1 to 10 μm, 0.5 to 8 μm, or 1.0 μm to 5 μm. The uneven surface may have a haze of 80% or less, or 70% or less. For example, the haze may be 40% to 80% or 50% to 70%. In some cases, the uneven surface may be a high hardness surface having a high hardness, for example, a pencil hardness of 1B or more, or 2B or more. For example, the pencil hardness may be about 1B to 4B, or about 2B to 4B.

The uneven surface can be formed using another resin layer, for example. For example, an uneven surface may be formed by a method of transferring an uneven shape by an imprinting process or a frame during the process of forming a resin layer, or a bead or the like capable of forming unevenness in a resin layer having an appropriate thickness Thereby forming an uneven surface.

The resin layer may include, for example, a room temperature curable type, a moisture curing type, a thermosetting type or a light curing type resin composition in a cured state. In one example, the resin layer may include a thermosetting or photocurable resin composition or a photocurable resin composition in a cured state. The room temperature curable, moisture curable, thermosetting or photocurable resin composition as used herein means a composition which can be induced in the cured state at room temperature or in the presence of appropriate moisture by application of heat or irradiation of an active energy ray .

For example, the resin composition may include an acrylic compound, an epoxy compound, a urethane compound, a phenol compound, or a polyester compound as a main component. In the above, the "compound" may be a monomeric, oligomeric or polymeric compound.

As another example, as the resin composition, an acrylic resin composition excellent in optical properties such as transparency and excellent in resistance to yellowing, for example, a photo-curable acrylic resin composition can be used. The photocurable acrylic composition may comprise, for example, an active energy ray polymerizable polymer component and a reactive diluent monomer.

Examples of the polymer component include a component known as an active energy pre-polymerizable oligomer such as urethane acrylate, epoxy acrylate, ether acrylate or ester acrylate, or a monomer such as a (meth) acrylic acid ester monomer or the like Can be exemplified. Examples of the (meth) acrylic acid ester monomer include alkyl (meth) acrylate, (meth) acrylate having an aromatic group, heterocyclic (meth) acrylate or alkoxy (meth) acrylate.

Examples of the reactive diluting monomer which can be contained in the photocurable acrylic composition include monomers having one or more photocurable functional groups such as an acryloyl group or a methacryloyl group. As the reactive diluting monomer, for example, the above (meth) acrylic acid ester monomers, multifunctional acrylates, and the like can be used.

The selection of the above-mentioned components for producing the photocurable acrylic composition, the blending ratio of the selected components and the like are not particularly limited and can be adjusted in consideration of the hardness and other physical properties of the desired resin layer.

Unevenness can be formed in the resin layer in an appropriate manner in the process of forming the resin layer using the resin composition, or the uneven surface can be realized by including beads in the resin layer. In this case, when the beads are included, the beads may have a refractive index that is different from or substantially equivalent to that of the resin layer. If the bead has a refractive index different from that of the resin layer, a side effect of inducing light diffusion through the resin layer can be obtained.

The shape of the beads contained in the resin layer is not particularly limited and may be, for example, spherical, elliptical, polyhedral, amorphous or other shapes. Examples of the specific types of beads include various inorganic or organic beads. Examples of the inorganic beads include silica, amorphous titania, amorphous zirconia, indium oxide, alumina, amorphous zinc oxide, amorphous cerium oxide, barium oxide, calcium carbonate, amorphous barium titanate, barium sulfate, Examples of the beads include, but are not limited to, crosslinked or non-crosslinked particles of an organic material such as an acrylic resin, a styrene resin, a urethane resin, a melamine resin, a benzoguanamine resin, an epoxy resin or a silicone resin .

The method of forming the uneven surface in the resin layer without using the bead is not particularly limited. For example, the resin composition may be cured in a state in which the coating layer of the resin composition is brought into contact with a mold having a desired concavo-convex structure, or an uneven surface may be realized through an imprinting method or the like.

In some cases, the resin composition may be constituted so that the resin layer has a high hardness, so that the resin layer functions as a high hardness layer. In this case, the hardness of the resin layer can be adjusted to have, for example, a pencil hardness in the range described above.

Meanwhile, in the present application, the pressure-sensitive adhesive layer 400 may be formed between the display panel 100 and the packaging film 300 so that they can be attached and fixed. The pressure-sensitive adhesive layer 400 may be formed, for example, by coating on the packaging film 300, that is, coating the first region 310 of the packaging film 300. In addition, the pressure-sensitive adhesive layer 400 may be formed on the display panel 100 by coating a coating, for example, on the back polarizing plate 160. As another example, the pressure-sensitive adhesive layer 400 may be formed by a transfer method. That is, the pressure-sensitive adhesive layer 400 may be coated on a separate release film and then transferred onto the display panel 100 or the packaging film 300.

The pressure-sensitive adhesive layer 400 may be formed from a pressure-sensitive adhesive composition. At this time, the pressure-sensitive adhesive composition may be exemplified as follows. The pressure-sensitive adhesive composition illustrated below includes a pressure-sensitive adhesive layer 400 formed between the display panel 100 and the packaging film 300 as well as the pressure-sensitive adhesive layer 400 between the display panel 100 and the packaging film 300, And the second adhesive layer that can be formed between the backside element 200 and the second adhesive layer.

In the present application, the pressure-sensitive adhesive composition includes, for example, a photocurable type and a thermosetting type. The pressure-sensitive adhesive composition may include, for example, a monomer or a polymer component. The monomer or polymer component may undergo a curing process to form the base of the pressure-sensitive adhesive layer. The term " polymer " in the present application is a generic term of a compound in which two or more monomers are polymerized, and includes, for example, a component commonly referred to as an oligomer. In the field of the production of a pressure-sensitive adhesive, various monomers or polymer components used for constituting the pressure-sensitive adhesive composition are known, and these components can be used without limitation. The monomer or polymer includes, for example, an acrylic type, a urethane type, an epoxy type, and the like.

In the thermosetting pressure-sensitive adhesive composition, the monomer or the polymer component may be, for example, an acrylic polymer having a crosslinkable functional group. As the acrylic polymer, for example, a polymer having a weight average molecular weight (Mw) of about 1.5 million or more and a glass transition temperature of about -24 ° C to -16 ° C can be used. The specific kind of the polymer is not particularly limited, and a polymer commonly used as a pressure-sensitive adhesive resin, for example, a (meth) acrylic acid alkyl ester and a copolymerizable monomer capable of providing a crosslinkable functional group at the side chain or terminal of the polymer Acrylic polymers may be used that are included in polymerized form. Specific examples of the alkyl (meth) acrylate include alkyl groups having 1 to 14 carbon atoms such as methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate or ethyl (Meth) acrylate and the like. As the polymerizable monomer, a monomer having both a copolymerizable functional group such as an ethylenic double bond and a crosslinkable functional group such as a hydroxyl group, a carboxyl group, an epoxy group, an isocyanate group or an amide group at the same time can be used.

The weight ratio of each monomer contained in the acrylic polymer having a crosslinkable functional group is not particularly limited and can be adjusted in consideration of the initial adhesive force, adhesive force and cohesive force of the desired pressure-sensitive adhesive layer. In addition, the acrylic polymer may contain, if necessary, various copolymerizable monomers other than those described above in a polymerized form. The polymer can be prepared by conventional polymerization methods in this field, for example, solution polymerization, photo polymerization, bulk polymerization, suspension polymerization or emulsion polymerization. And the like.

The thermosetting pressure-sensitive adhesive composition may further comprise a multifunctional crosslinking agent capable of crosslinking the polymer together with the acrylic polymer. In this case, the type of the specific crosslinking agent is not particularly limited, and for example, known crosslinking agents such as an isocyanate crosslinking agent, an epoxy crosslinking agent, an aziridine crosslinking agent and a metal chelating crosslinking agent can be used. The ratio of the cross-linking agent in the composition is not particularly limited and can be appropriately adjusted in consideration of the desired cohesive force.

The pressure-sensitive adhesive composition may be a photocurable pressure-sensitive adhesive composition. The term "photocurable pressure-sensitive adhesive composition" in the present application means a composition which is irradiated with light, that is, a curing process is induced by irradiation of an electromagnetic wave to be converted into a pressure-sensitive adhesive. The electromagnetic waves may include electromagnetic waves such as microwaves, infrared (IR), ultraviolet (UV), X-rays, gamma rays or alpha-particle beams, proton beams, neutron beams, (electron beam) is used to collectively refer to the particle beam.

In the photocurable pressure-sensitive adhesive composition, the monomer or polymer component may comprise a photocurable oligomer and a reactive diluting monomer. Photocurable oligomers may include all oligomer components used in the manufacture of photocurable pressure sensitive adhesive compositions such as ultraviolet curable type in the art. For example, the oligomer may be a urethane acrylate obtained by reacting a polyisocyanate having two or more isocyanate groups in a molecule and a hydroxyalkyl (meth) acrylate; Ester type acrylate obtained by dehydration condensation reaction of polyester polyol and (meth) acrylic acid; Ester-based urethane acrylate obtained by reacting ester-based urethane resin obtained by reacting polyester polyol and polyisocyanate with hydroxyalkyl acrylate; Ether-based acrylates such as polyalkylene glycol di (meth) acrylate and the like; Ether-based urethane acrylate obtained by reacting an ether-based urethane resin obtained by reacting a polyether polyol and a polyisocyanate with a hydroxyalkyl (meth) acrylate; Or an epoxy acrylate obtained by addition reaction of an epoxy resin and (meth) acrylic acid, but not limited thereto.

As the reactive diluting monomer, monomers having reactive functional groups such as (meth) acryloyl groups in the molecular structure can be used without any particular limitation. These monomers can serve to control the viscosity of the composition and to achieve adhesion after curing. Examples of such monomers include alkyl (meth) acrylates; Hydroxy group-containing monomers such as hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate or hydroxybutyl (meth) acrylate; Carboxyl group-containing monomers such as (meth) acrylic acid or beta-carboxyethyl (meth) acrylate; Alkoxy group-containing monomers such as 2- (2-ethoxyethoxy) ethyl (meth) acrylate and the like; Aromatic group-containing monomers such as benzyl (meth) acrylate or phenoxyethyl (meth) acrylate; Monomers containing a heterocyclic residue such as tetrahydrofurfuryl (meth) acrylate or (meth) acryloyl morpholine; and the like; Or polyfunctional acrylates, but are not limited thereto.

The specific types and blending ratios of the photocurable oligomer and the reactive diluting monomer are not particularly limited and may be suitably selected in consideration of the viscosity of the intended composition and the adhesive property to be achieved after curing.

In another example of a photocurable pressure-sensitive adhesive composition, the monomer or polymer component may be a photocurable syrup. The photocurable syrup may be a monomer mixture or a partial polymer thereof including a (meth) acrylic acid ester monomer such as alkyl (meth) acrylate and the like.

Examples of the (meth) acrylic esters contained in the monomer mixture include alkyl (meth) acrylates having a straight chain or branched alkyl group having 1 to 14 carbon atoms, such as methyl (meth) acrylate, ethyl (Meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (Meth) acrylate, n-octyl (meth) acrylate, hexyl (meth) acrylate, 2-ethylhexyl (meth) (Meth) acrylate, lauryl (meth) acrylate, and tetradecyl (meth) acrylate, copolymerizable monomers or other copolymerizable monomers capable of providing the above-mentioned crosslinkable functional groups, for example, , Oligomers or reactive diluting monomers described above, and the like.

When the pressure-sensitive adhesive composition contains, as the syrup, a partial polymer of the above-mentioned monomer mixture, the polymerization rate of the monomer mixture or the conversion ratio of the monomer is not particularly limited. For example, the polymerization rate or the conversion rate can be controlled in consideration of process efficiency, desired adhesive property, and the like.

Another example of the photocurable pressure-sensitive adhesive composition is a pressure-sensitive adhesive composition capable of forming a pressure-sensitive adhesive layer containing a so-called Interpenetrating Polymer Network (hereinafter, sometimes referred to as " IPN "). The term " IPN " in this application may refer to a state in which at least two or more crosslinking structures exist in the pressure-sensitive adhesive layer, and in one example, the crosslinking structures may be entanglement, It can be in a state of penetrating. When the pressure-sensitive adhesive layer contains IPN, a pressure-sensitive adhesive layer having excellent durability under severe conditions and excellent workability, light-shielding ability, and the like can be realized.

In the pressure-sensitive adhesive composition capable of forming the pressure-sensitive adhesive layer comprising the IPN structure, the monomer or the polymer component may be an acrylic polymer. In this case, as the acrylic polymer that can be used, an acrylic polymer used in the above-mentioned thermosetting adhesive composition may be exemplified. The photocurable pressure sensitive adhesive composition may further comprise the multifunctional crosslinking agent and the photocurable multifunctional compound mentioned in the item of the thermosetting pressure-sensitive adhesive composition together with the acrylic polymer. The photo-curable polyfunctional compound may mean a compound containing two or more functional groups that can be polymerized by irradiation with light. The pressure-sensitive adhesive layer formed by such a composition may include, for example, a crosslinked structure containing an acrylic polymer crosslinked by a polyfunctional crosslinking agent and a crosslinked structure containing the polymerized polyfunctional compound.

As the photocurable multifunctional compound, for example, a multifunctional acrylate may be used. As the polyfunctional acrylate, any compound having two or more (meth) acryloyl groups in the molecule can be used without limitation. (Meth) acrylate, 1,6-hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, neopentyl Acrylate, neopentylglycol adipate di (meth) acrylate, hydroxyl puivalic acid neopentyl glycol di (meth) acrylate, dicyclopentanyl di (meth) acrylate, caprolactone- (Meth) acrylates such as cyclopentenyl di (meth) acrylate, ethylene oxide modified di (meth) acrylate, di (meth) acryloxyethyl isocyanurate, allyl cyclohexyl di (Meth) acrylates such as dimethanol (meth) acrylate, dimethylol dicyclopentanedi (meth) acrylate, ethylene oxide modified hexahydrophthalic acid di (meth) acrylate, tricyclodecanedimethanol Adamantane di (meth) acrylate or 9,9-bis [4- (2-acryloyloxyethoxy) phenyl] fluorene (meth) acrylate or neopentyl glycol modified trimethyl propane di bifunctional acrylates such as fluorine and the like; (Meth) acrylates such as trimethylolpropane tri (meth) acrylate, dipentaerythritol tri (meth) acrylate, propionic acid modified dipentaerythritol tri (meth) acrylate, pentaerythritol tri Trifunctional acrylates such as modified trimethylolpropane tri (meth) acrylate, trifunctional urethane (meth) acrylate or tris (meth) acryloxyethylisocyanurate; Tetrafunctional acrylates such as diglycerin tetra (meth) acrylate or pentaerythritol tetra (meth) acrylate; Pentafunctional acrylates such as propionic acid-modified dipentaerythritol penta (meth) acrylate; And dipentaerythritol hexa (meth) acrylate, caprolactone-modified dipentaerythritol hexa (meth) acrylate or urethane (meth) acrylate (e.g., an isocyanate monomer and trimethylolpropane tri Hexafunctional acrylates such as acrylonitrile, acrylonitrile, methacrylonitrile, acrylonitrile, methacrylonitrile and the like can be used. In some cases, various types of urethane acrylates, polycarbonate acrylates, polyester acrylates, polyether acrylates Or an epoxy acrylate may also be used.

The ratio of the acrylic polymer, the crosslinking agent and the photo-curable polyfunctional compound in the pressure-sensitive adhesive composition is not particularly limited and can be controlled by the physical properties of the desired pressure-sensitive adhesive.

The pressure-sensitive adhesive composition may further include, in addition to each component described above, a radical initiator such as a photoinitiator or a thermal initiator, and may contain a conventional photo-radical initiator. The photo radical initiator is not particularly limited as long as it can generate a radical by irradiation of an electromagnetic wave and initiate a curing reaction. The proportion of the radical initiator is also not particularly limited and may be selected within a range in which an appropriate curing reaction of the photo-curable components contained in the composition can be induced.

The pressure-sensitive adhesive composition may further contain at least one additive selected from the group consisting of a silane coupling agent, a tackifier resin, an epoxy resin, a curing agent, a UV stabilizer, an antioxidant, a colorant, a reinforcing agent, a filler, a defoamer, a surfactant and a plasticizer As shown in FIG.

The method of forming the pressure-sensitive adhesive layer using the pressure-sensitive adhesive composition as described above is not particularly limited. In the process of forming the pressure-sensitive adhesive layer, a curing process may be performed by applying heat and / or irradiating light. In this curing process, the packaging film 300 and the adherend are adhered to each other through the adhesive layer, Or may be performed after attaching the display panel 300 and the display panel 100 to each other. The heat application conditions and the light irradiation conditions are not particularly limited, and can be performed, for example, under conditions that ensure the properties of the intended pressure-sensitive adhesive layer. The irradiation of the light can be performed by means of, for example, a high-pressure mercury lamp, a non-electrode lamp, or a xenon lamp. The illuminance at the time of light irradiation is controlled within a range of, for example, 50 mW / cm ² to 2,000 mW / cm ² , and the light amount is controlled within a range of 10 mJ / cm ² to 1,000 mJ / cm ² But is not limited thereto.

2 to 4, a barrier layer 500 may be formed on a side surface of the display panel 100. Referring to FIG. It is sufficient that the barrier layer 500 can prevent at least external moisture from penetrating into the display panel 100. To this end, the barrier layer 500 may have at least water impermeability (moisture barrier properties). In addition, the barrier layer 500 should be capable of blocking moisture such as moisture, as well as preventing gas such as outside air from penetrating. For this purpose, the barrier layer 500 may have gas impermeability.

The barrier layer 500 is not particularly limited as long as it has at least moisture barrier property. The barrier layer 50 may include at least one selected from, for example, a moisture-barrier resin layer, a metal thin film layer, and a vapor deposition layer.

The resin layer may be, for example, a film layer formed by attaching a moisture barrier resin film to the side surface of the display panel 100, or a resin coating layer having a moisture barrier resin composition coated on a side surface of the display panel 100 . The resin composition constituting such a resin layer is not limited, and includes a thermosetting type and a light-curing type. Further, the resin layer may have, for example, one layer or two or more layers.

The resin layer may be formed of, for example, a styrene resin, a polyolefin resin, a thermoplastic elastomer, a polyoxyalkylene resin, a polyester resin, a polyvinyl chloride resin, a polycarbonate resin, a polyphenylene sulfide resin, A polyamide resin, an acrylate resin, an epoxy resin, a silicone resin, a fluorine resin, or a mixture thereof.

Examples of the styrene resin include styrene-ethylene-butadiene-styrene block copolymer (SEBS), styrene-isoprene-styrene block copolymer (SIS), acrylonitrile-butadiene-styrene block copolymer (ABS) , Acrylonitrile-styrene-acrylate block copolymer (ASA), styrene-butadiene-styrene block copolymer (SBS), styrene homopolymer or mixtures thereof. As the olefin-based resin, for example, a high-density polyethylene-based resin, a low-density polyethylene-based resin, a polypropylene-based resin, or a mixture thereof can be exemplified. As the thermoplastic elastomer, for example, an ester type thermoplastic elastomer, an olefin type thermoplastic elastomer or a mixture thereof can be used. Of these, a polybutadiene resin or a polyisobutene resin can be used as the olefinic thermoplastic elastomer. As the polyoxyalkylene resin, for example, a polyoxymethylene resin, a polyoxyethylene resin or a mixture thereof can be exemplified. As the polyester resin, for example, a polyethylene terephthalate resin, a polybutylene terephthalate resin or a mixture thereof can be exemplified. As the polyvinyl chloride resin, for example, polyvinylidene chloride and the like can be mentioned. As the mixture of the hydrocarbons, for example, hexatriacotane or paraffin can be exemplified. As the polyamide-based resin, for example, nylon and the like can be mentioned. As the acrylate resin, for example, polybutyl (meth) acrylate and the like can be mentioned. Examples of the epoxy resin include bisphenol type epoxy resins such as bisphenol A type, bisphenol F type, bisphenol S type and water additives thereof; Novolak types such as phenol novolac type and cresol novolak type; Nitrogen-containing cyclic rings such as triglycidyl isocyanurate type and hydantoin type; Alicyclic type; Fat type; Aromatic types such as naphthalene type and biphenyl type; Glycidyl types such as glycidyl ether type, glycidyl amine type and glycidyl ester type; Dicyclopentane type such as dicyclopentadiene type; Ester type; Ether ester type, mixtures thereof, and the like. As the silicone resin, for example, polydimethylsiloxane and the like can be mentioned. Examples of the fluororesin include polytrifluoroethylene resin, polytetrafluoroethylene resin, polychlorotrifluoroethylene resin, polyhexafluoropropylene resin, polyfluorinated vinylidene, polyfluorinated vinyl, polyfluoro Ethylene propylene oxide, ethylene propylene ethylene oxide, ethylene propylene ethylene oxide, ethylene propylene oxide, and the like.

The resin listed as the component of the resin layer may be grafted with, for example, maleic anhydride or the like, or may be copolymerized with monomers for producing other resin or resin to be listed, and may be modified by other compounds It can also be used. Examples of the other compounds include carboxyl-terminated butadiene-acrylonitrile copolymers and the like.

The resin listed as a component of the resin layer may contain one or more functional groups or moieties capable of being cured by heat such as a glycidyl group, an isocyanate group, a hydroxyl group, a carboxyl group or an amide group so as to exhibit adhesiveness Or a functional group capable of being cured by irradiation with an active energy ray such as an epoxide group, a cyclic ether group, a sulfide group, an acetal group or a lactone group, or One or more sites.

According to one exemplary embodiment, the resin layer may comprise a polyisobutene resin. The polyisobutene resin is hydrophobic and can exhibit low moisture permeability and low surface energy. Specific examples of the polyisobutene resin include homopolymers of isobutylene monomers; Or a copolymer obtained by copolymerizing an isobutylene monomer and other monomer capable of polymerization can be used. Here, the other monomer capable of polymerization with the isobutylene monomer may include, for example, 1-butene, 2-butene, isoprene, or butadiene.

As the component of the resin layer, a base resin having a weight average molecular weight (Mw) to the extent that it can be formed into a film shape can be used. In one example, the range of the weight average molecular weight to such an extent that molding into a film shape can range from about 100,000 to 2,000,000, 100,000 to 1,500,000, or 100,000 to 100,000. The term "weight average molecular weight" as used herein means a value converted to a standard polystyrene measured by GPC (Gel Permeation Chromatograph).

According to an exemplary embodiment, the resin layer may further include a moisture removing agent in addition to the resin component as described above. As a result, the moisture barrier property of the resin layer can be further improved. In one example, the moisture scavenger may be present evenly dispersed in the resin layer. Here, the evenly dispersed state may mean a state where the moisture removing agent is present at the same or substantially the same density at any portion of the resin layer.

Examples of the moisture removing agent include metal oxides, sulfates, and organic metal oxides. Specifically, examples of the metal oxide include magnesium oxide, calcium oxide, strontium oxide, barium oxide, and aluminum oxide. Examples of the sulfate include magnesium sulfate, sodium sulfate, and nickel sulfate. Examples of the organic metal oxides include aluminum oxide octylate and the like. As the moisture removing agent, one kind of the above-mentioned components may be used, or two or more kinds may be used. In one example, calcined dolomite or the like may be used when two or more kinds of water-removing agents are used.

The moisture scavenger may have an appropriate size. In one example, the average particle diameter of the moisture scavenger may have a size on the order of 10 to 15,000 nm. The water-scavenging agent having a size within the above range is not too fast to react with water, so that it is easy to store and can effectively block moisture. The content of such a moisture removing agent can be controlled, for example, in the range of 5 to 250 parts by weight relative to 100 parts by weight of the resin which can be used as the resin layer as described above.

Further, in one example, the resin layer may further include a dispersing agent so that the moisture removing agent can be uniformly dispersed in the resin layer. As the dispersing agent that can be used here, for example, a nonionic surfactant having affinity with a surface of a hydrophilic water-removing agent and having good compatibility with a resin can be used.

According to another exemplary embodiment, the resin layer may include a thermosetting and photo-curable pressure-sensitive adhesive composition as described in the pressure-sensitive adhesive layer 400 as long as the resin layer has moisture barrier properties.

The metal thin film layer may be a metal foil having a thickness of, for example, 1 m to 300 m, and may be attached to the display panel 100 through an adhesive, for example.

The deposition layer is formed by depositing at least one selected from a metal and a metal oxide and is deposited on a base film such as polyethylene terephthalate (PET), polyethylene (PE), or polypropylene (PP) And then attached to the display panel 100 together with the base film.

The metal forming the barrier layer 500, specifically, the metal thin film layer or the deposition layer may be formed of a metal such as aluminum (Al), copper (Cu), nickel (Ni), tin (Sn) (A single metal or a mixture of single metals) selected from the group consisting of zinc (Zn), indium (In), silver (Ag), tungsten (W) and iron Alloys, and the like, but are not limited thereto. Examples of the metal oxide that can be used as the deposition layer include aluminum oxide (Al ₂ O ₃ ), silicon oxide (SiO ₂ ), tin oxide (SnO ₂ ), indium oxide (In ₂ O ₃ ) ZnO) and the like.

In addition, the barrier layer 500 may include a resin layer as described above, and the resin layer may be formed by applying a resin composition (pressure-sensitive adhesive composition) such as a thermosetting type or a light-curing type. (Adhesive force) of 2.5 kgf / inch or more. The upper limit of the peeling force is not limited. In the case of having such a peeling force, for example, it is possible to strengthen the bonding force to the display panel 100 having a multi-layer structure. Specifically, the liquid crystal cell layer 120, the front polarizer 140, and the rear polarizer 160 may be adhered and fixed on the side surface to enhance their bonding force. For example, the peel strength of the resin layer may be 2.5 to 20.0 kgf / inch.

According to the present invention described above, an improved display device is realized. For example, after the backside element 200 such as the optical element 200A is packaged by the packaging film 300, it is attached to the back side of the display panel 100 through the pressure-sensitive adhesive layer 400, The area is minimized. That is, the use of the molding frame for fixing the display panel 100 and the back-surface element 200 is eliminated, and a free-bezel display device having almost no bezel can be realized.

Also, excessive time consuming and damage to the optical element 200A, which may occur in the handling and assembly of the back-surface element 200, for example, the optical element 200A on the film (or sheet) . Then, the optical element 200A is packaged by the packaging film 300 so as to have a sealing property, so that the shape of the light beam is prevented.

100: display panel 120: liquid crystal cell layer
140: front polarizer 160: back polarizer
200: Rear element 200A: Optical element
200a: optical member 210: light guide plate
220: diffusion sheet 230: luminance enhancement film
240: light source 300: packaging film
310: first area 314: light-permeable treatment part
320: second area 330: third area
350: Notch 360: Overlap prevention processor
361: a corner portion 362: a cutting portion
400: pressure-sensitive adhesive layer 500: barrier layer

Claims (13)

A first region corresponding to a front surface of a rear surface element provided on a rear surface of the display panel;
A second region extending from the first region and corresponding to a side surface of the backside element; And
A third region extending from the second region and corresponding to a back surface of the backside element,
Wherein a back surface of the packaging film has an uneven surface,
Wherein the third region is formed with an overlap prevention processing portion for preventing overlapping with the adjacent third region when the third region is positioned corresponding to the back surface of the back surface element by bending,
Wherein the overlap prevention processing section is a cutting section cut at a predetermined angle (?) Or a cut section cut or removed at a predetermined length (L).
The method according to claim 1,
Wherein the uneven surface has an RMS roughness of 0.1 占 퐉 to 10 占 퐉.
The method according to claim 1,
Wherein the uneven surface has a haze of 80% or less.
The method according to claim 1,
Wherein the uneven surface has a pencil hardness of 1B to 4B.
delete The method according to claim 1,
Lt; RTI ID = 0.0 > 2, < / RTI >
A display panel;
A rear surface element provided on a rear surface of the display panel;
A packaging film for packaging the backside element; And
And a pressure-sensitive adhesive layer formed between the display panel and the packaging film,
Wherein the packaging film is the packaging film according to any one of claims 1, 2, 3, 4, and 6.
8. The method of claim 7,
Wherein the back surface element includes an optical element.
9. The method of claim 8,
Wherein the optical element comprises:
A light guide plate for converting the point light source emitted from the light source into a surface light source; And
And a diffusion sheet for diffusing light emitted from the light guide plate.
10. The method of claim 9,
Wherein the optical element further comprises a brightness enhancement film formed on the diffusion sheet.
9. The method of claim 8,
Wherein the optical element comprises:
Light source;
A light guide plate for converting the point light source emitted from the light source into a surface light source; And
And a diffusion sheet for diffusing light emitted from the light guide plate.
12. The method of claim 11,
Wherein the optical element further comprises a brightness enhancement film formed on the diffusion sheet.
8. The method of claim 7,
Wherein the pressure-sensitive adhesive layer comprises a thermosetting or photocurable pressure-sensitive adhesive composition.

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