KR102604221B1 - Display device - Google Patents

Abstract

A display device includes a display panel, a light source, and light source components. The optical component receives the light from the light source, and outputs the provided light toward the display panel. The optical component includes a light guide film, an optical sheet, and a reinforcement part. The light guide film guides the light toward the display panel, the optical sheet is coupled to the light guide film, and the optical sheet is disposed between a base film and the base film and the light guide film to control the direction of travel of the light. It has optical patterns. The reinforcement portion is filled between the base film and the light guide film corresponding to the edge of the optical component.

Description

Display device {DISPLAY DEVICE}

The present invention relates to optical components and display devices, and more specifically, to optical components that control the direction of light provided from a light source and a display device including the same.

A display device, such as a liquid crystal display, includes a backlight assembly and a display panel that displays an image using light output from the backlight assembly. The backlight assembly may include a light emitting unit, a light guide plate, and optical sheets that control a path of light emitted from the light guide plate.

The light guide plate guides light generated from the light emitting unit toward the display panel. Examples of the optical sheets include a diffusion sheet and a prism sheet. The diffusion sheet diffuses the light emitted from the light guide plate, and the prism sheet condenses the light emitted from the light guide plate toward the front of the display panel.

The purpose of the present invention is to provide a display device including optical components with improved durability by integrating a light guide film and an optical sheet.

A display device for achieving the object of the present invention described above includes a display panel, a light source, and light source components. The light source generates light, and the display panel receives the light and displays an image. The optical component receives the light, and the optical component outputs the provided light toward the display panel.

The optical component includes a light guide film, an optical sheet, and a reinforcement part. The light guide film guides the light toward the display panel, the optical sheet is coupled to the light guide film, and the optical sheet is disposed between a base film and the base film and the light guide film to control the direction of travel of the light. It has optical patterns. The reinforcement portion is filled between the base film and the light guide film corresponding to the edge of the optical component.

Another display device for achieving the object of the present invention described above includes a display panel, a light source that generates light, and an optical component that receives the light from the light source and outputs it to the display panel.

The optical component includes a light guide film and an optical sheet coupled to the light guide film.

The optical sheet includes a base film, optical patterns, and reinforcement patterns. The optical patterns are disposed between the base film and the light guide film. Additionally, the reinforcement patterns are disposed between the base film and the light guide film, and each of the reinforcement patterns has a reflective layer adhered to the light guide film.

According to an embodiment of the present invention, in an optical component in which a light guide film and an optical sheet are integrated, by filling a reinforcement portion between the light guide film and the optical sheet, the space between the optical component and the optical sheet can be supported by the reinforcement portion. . Accordingly, the light guide film in the optical component can be prevented from being separated from the optical sheet.

Additionally, according to another embodiment of the present invention, as a light blocking layer is disposed on the outer surface of the reinforcement part, light flowing into the interior of the optical component through the reinforcement part may be blocked by the light blocking layer. Accordingly, the luminance of the light output from the optical component due to the introduced light can be prevented from becoming non-uniform, and the amount of light output in a diagonal direction with respect to the front direction of the optical component due to the introduced light is reduced. The light-gathering effect of the optical component can be improved.

Figure 1A is a perspective view of a display device in one embodiment of the present invention.
FIG. 1B is a perspective view of the optical component shown in FIG. 1A.
FIG. 2 is a plan view showing the back of the light emitting unit and optical components shown in FIG. 1A.
FIG. 3A is a cross-sectional view showing a surface cut along II′ shown in FIG. 1A.
FIG. 3b is a cross-sectional view showing a surface cut along II-II′ shown in FIG. 1b.
FIG. 4 is a diagram explaining the optical function of one of the optical patterns shown in FIG. 3A.
Figure 5a is a plan view of an optical component and a light emitting unit according to another embodiment of the present invention.
FIG. 5b is a cross-sectional view showing a section taken along line III-III′ shown in FIG. 5a.
Figure 6 is a plan view of an optical component and a light emitting unit according to another embodiment of the present invention.
Figure 7 is a cross-sectional view of an optical component according to another embodiment of the present invention.
Figure 8 is a plan view of a display device according to another embodiment of the present invention.
FIG. 9 is a cross-sectional view taken along line IV-IV of FIG. 8.
Figure 10 is a plan view of a light source unit and optical components of a display device according to another embodiment of the present invention.
Figure 11 is a cross-sectional view of a display device according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be examined in detail with reference to the attached drawings. The purpose, features and effects of the present invention described above can be easily understood through the drawings and related embodiments. However, the present invention is not limited to the embodiments described herein, and may be applied and modified in various forms. Rather, the embodiments of the present invention, which will be described later, are provided to make the technical idea disclosed by the present invention clearer and further to enable the technical idea of the present invention to be sufficiently conveyed to those skilled in the art with average knowledge in the field to which the present invention pertains. Accordingly, the scope of the present invention should not be construed as limited by the embodiments described later. Meanwhile, the same reference numbers in the following examples and drawings indicate the same components.

Additionally, in this specification, terms such as 'first' and 'second' are used not in a limiting sense but for the purpose of distinguishing one component from another component. In addition, when a part such as an act, area, or component is said to be ‘on’ or ‘on’ another part, it does not only mean that it is directly on top of the other part, but also that there is another act, area, component, etc. in between. Also includes cases.

FIG. 1A is a perspective view of a display device 600 according to an embodiment of the present invention, FIG. 1B is a perspective view of the optical component 300 shown in FIG. 1A, and FIG. 2 shows the light emitting unit 100 shown in FIG. 1A and This is a plan view showing the back of the optical component 300.

1A, 1B, and 2, the display device 600 may be a liquid crystal display device, and the display device 600 includes a display panel 200, a light emitting unit 100, and an optical component 300. Includes.

The display panel 200 displays an image using light generated from the light emitting unit 100. In this embodiment, the display panel 200 includes a first display substrate 201, a second display substrate 202, and a liquid crystal interposed between the first display substrate 201 and the second display substrate 202. It may include a layer (not shown).

In this embodiment, the first display substrate 201 may include a plurality of pixel electrodes (not shown) arranged in one-to-one correspondence with the plurality of pixel areas, and the second display substrate 202 may include the plurality of pixel electrodes. It may include a common electrode (not shown) facing the pixel electrodes. However, the present invention is not limited to the structures of the first display substrate 201 and the second display substrate 202. For example, in another embodiment, the second display substrate 202 may not include the common electrode, and instead, the first display substrate 201 may include the common electrode, in which case the In the first display substrate 201, the common electrode may be spaced apart from the plurality of pixel electrodes.

The light emitting unit 100 includes a driving circuit board (PB) and a plurality of light sources (LG) mounted on the driving circuit board (PB). In this embodiment, each of the plurality of light sources LG may be a light emitting diode package, and the plurality of light sources LG receives power from the driving circuit board PB and generates light LT0.

In this embodiment, the plurality of light sources LG may be arranged along one side of the optical component 300. In another embodiment, a number of other light sources may be further arranged along the other side of the optical component 300.

In this embodiment, the optical component 300 includes a light guide film (LGF), light collection layers (LP), an optical sheet (ST), and a reinforcement portion 50. The optical component 300 receives the light LT0 from the plurality of light sources LG, and outputs the provided light LT0 toward the display panel 200 .

In this embodiment, the light guide film (LGF) includes a polymer material, and the light guide film (LGF) has a thin film shape and may be flexible. For example, the light guide film (LGF) may include polyethylene terephthalate (PET), polymethyl methacrylate (PMMA), or poly carbonate (PC), and the thickness of the light guide film (LGF) is 100 micrometers to 500 micrometers. It can have a thickness of meters.

The light guide film (LGF) includes an incident surface (LS1), an opposing surface (LS2) opposing the incident surface (LS1), a first connection surface (LS3), a second connection surface (LS4), and an exit surface (see Figure 3c). LS5) is defined. The light LT0 is incident toward the light guide film LGF through the incident surface LS1, and the incident light LT0 is emitted to the outside of the light guide film LGF through the emission surface. The first connection surface LS3 connects the incident surface LS1 to the opposing surface LS2, and the second connection surface LS4 faces the first connection surface LS3, and the incident surface (LS3) connects the incident surface LS1 to the opposing surface LS2. LS1) is connected to the opposing surface (LS2).

When the thickness of the light guide film (LGF) is smaller than the width of the light emitting surface of each of the light sources (LG), the width of the incident surface (LS1) is designed to be larger than the width of the opposing surface (LS2), or the light guide An optical member connecting the incident surface LS1 of the film LGF and the light sources LG may be disposed. Accordingly, the efficiency with which the light LT0 is incident on the light guide film LGF can be improved.

The light collection layers LP are disposed on the back side of the light guide film LGF. In this embodiment, each of the light collection layers (LP) has a shape that protrudes from the back of the light guide film (LGF), and each of the light collection layers (LP) transmits light traveling inside the light guide film (LGF). It is refracted or reflected in the front direction of the display panel 200.

In this embodiment, each of the light collection layers LP may have a prism or lenticular shape. In addition, when a first direction D1 heading from the incident surface LS1 to the opposing surface LS2 and a second direction D2 perpendicular to the first direction D1 are defined, in this embodiment, the Each of the light collection layers LP may be extended in the first direction D1. Accordingly, each of the light collection layers LP has a longitudinal direction in the first direction D1, and each of the light collection layers LP has a width direction in the second direction D2.

In this embodiment, the display device 600 may further include a reflective sheet (not shown) facing the display panel 200 with the optical component 300 interposed therebetween. In another embodiment, instead of the reflective sheet, the back side of the light guide film (LGF) may be coated with a reflective material, thereby preventing the light (LT0) from leaking through the back side of the light guide film (LGF). This can be prevented.

The optical sheet (ST) may be combined with the light guide film (LGF) to have an integrated shape with the light guide film (LGF). In this embodiment, the optical sheet (ST) includes a base film (BS), optical patterns (TL), and an adhesive layer (AS in FIG. 3A).

The base film (BS) may have light transparency and flexibility. In this embodiment, the base film (BS) includes a polymer material such as PET, PMMA, and PC, and the base film (B2) has a thickness of tens of micrometers to hundreds of micrometers and may have a thin film shape. .

The optical patterns TL may include a polymer material having light transparency, such as PET, PEN, PC, and PMMA. The optical patterns TL are disposed on the base film BS and come into contact with the light guide film LGF. As a result, the optical patterns TL that totally reflect the inside of the light guide film LGF are the optical patterns TL. It may be emitted to the outside of the light guide film (LGF) through the patterns (TL). Additionally, the light LT0 is refracted by the optical patterns TL and focused toward the front of the display panel 200.

In this embodiment, the optical patterns TL may be arranged to be spaced apart from each other, and each of the optical patterns TL may have a dot shape on a plane. In FIG. 2, each of the optical patterns TL is shown as a circle, but each of the optical patterns TL may have a dot shape different from the circle. For example, each of the optical patterns TL may have a dot shape of an ellipse or a polygon.

As described above, the optical patterns TL emit light that is totally reflected inside the light guide film LGF to the outside, so the density of the optical patterns TL in the light guide film LGF increases. As the amount increases, the amount of light LT0 emitted from the light guide film LGF through the optical patterns TL may increase. Therefore, as shown in FIG. 2, the density of the optical patterns TL may decrease as it approaches the incident surface LS1, and may increase as it approaches the opposing surface LS2.

The reinforcement portion 50 is filled between the base film BS and the light guide film LGF corresponding to the edge of the optical component 300. In this embodiment, the reinforcement portion 50 includes a first reinforcement pattern 51, a second reinforcement pattern 52, a third reinforcement pattern 53, and a fourth reinforcement pattern 54. The first reinforcement pattern 51 has a linear shape extending along the incident surface LS1, and the second reinforcement pattern 52 has a linear shape extending along the opposing surface LS2, The third reinforcement pattern 53 has a linear shape extending along the first connection surface LS3, and the fourth reinforcement pattern 54 has a linear shape extending along the second connection surface LS4. It has a shape.

In this embodiment, two of the first to fourth reinforcement patterns 51 to 54 adjacent to each other have a shape connected to each other, so that the first to fourth reinforcement patterns 51 to 54 have an integrated shape. You can.

In this embodiment, the lower end of the reinforcing part 50 may be adhered to the adhesive layer AS, and the upper end of the reinforcing part 50 may be in contact with the base film BS. That is, the reinforcing part 50 may function as a spacer to support between the light guide film (LGF) and the base film (BS), and accordingly, the optical sheet (ST) is strengthened by the reinforcing part 50. And the bonding force between the light guide film (LGF) is improved, so that the optical sheet (ST) can be prevented from being peeled off from the light guide film (LGF).

In this embodiment, the reinforcement portion 50 may include the same material as the optical patterns TL. In terms of the manufacturing method of the reinforcing portion 50, when manufacturing the optical patterns TL on the base film BS by an imprint method, the reinforcing portion 50 is formed with the optical patterns TL. They can be formed by imprinting together.

In another embodiment, the reinforcement portion 50 may include a different material from the optical patterns TL. More specifically, the reinforcement portion 50 may include a polymer material colored with black pigment or dye. Accordingly, the optical patterns TL can block light flowing into the optical component 300.

FIG. 3A is a cross-sectional view showing a surface cut along II-I′ shown in FIG. 1A, and FIG. 3B is a cross-sectional view showing a surface cut along II-II′ shown in FIG. 1B.

Referring to FIGS. 3A and 3B, the optical sheet ST is disposed on the light guide film LGF and has an integrated shape with the light guide film LGF. Light collection layers (LP) are disposed on the back of the light guide film (LGF), and an adhesive layer (AS) is disposed on the top of the light guide film (LGF). In this embodiment, the adhesive layer (AS) may include an adhesive material having light transparency. For example, the adhesive layer (AS) may be an optical clear adhesive (OCA).

The optical patterns TL and the first reinforcement pattern 51 are disposed on the adhesive layer AS and adhered to the adhesive layer AS, and the optical patterns TL and the first reinforcement pattern 51 are A base film (BS) is laminated on top, and a diffusion layer (DL) is disposed on the base film (BS).

The optical patterns TL are arranged to be spaced apart from each other between the light guide film LGF and the base film BS, and an air layer AR is formed between two adjacent optical patterns among the optical patterns TL. This is included. In this embodiment, the optical patterns TL may include polymer materials such as PET, PMMA, and PC, and accordingly, the refractive index of the optical patterns TL is greater than that of the air layer AR. Accordingly, total reflection may occur at the interface depending on the angle at which light emitted from the light guide film (LGF) is incident on the interface of the optical patterns (TL) and the air layer (AR).

The manufacturing method of the optical component 300 having the structure described above with further reference to FIG. 1 is as follows. A reinforcement portion 50 including the optical patterns TL and the first reinforcement pattern 51 is formed on one side of the base film BS, and the diffusion layer is formed on the other side of the base film BS. (DL) is formed to complete the manufacture of the optical sheet (ST). In addition, the light collection layers LP are formed on one side of the light guide film LGF, and the adhesive layer AS is provided on the other side of the light guide film LGF. Afterwards, the optical sheet (ST) is pressed toward the adhesive layer (AS) to adhere the optical patterns (TL) and the reinforcement portion (50) to the adhesive layer (AS). As a result, manufacturing of the optical component 300 in which the optical sheet (ST) and the light guide film (LGF) are integrated can be completed.

Additionally, a method of manufacturing a large number of the optical components 300 is as follows. A plurality of optical patterns including the optical patterns TL on a preliminary base film having a size of several to hundreds of times that of the base film BS, a plurality of reinforcing portions including the reinforcing portion 50, and Manufacturing of the preliminary optical sheet is completed by forming a plurality of diffusion layers including the diffusion layer (DL). In addition, a plurality of light collecting layers including the light collecting layers (LP) and a plurality of adhesive layers including the adhesive layer (AS) are placed on a preliminary light guiding film having a size several to hundreds of times that of the light guiding film (LGF). The manufacturing of the preliminary light guide film is completed by forming them. After that, the spare optical sheet is adhered to the spare light guide film using the plurality of adhesive layers to form spare optical parts, and the spare optical parts are cut multiple times to the size of the optical part 200. Optical components 200 may be formed in multiple numbers.

Unlike the embodiment of the present invention, when the optical component 300 does not include the reinforcement portion 50, the light guide film (LGF) is cut by the pressure applied to the position where the spare optical components are cut. A peeling phenomenon may occur where the optical sheet (ST) is peeled off. In particular, when the position where the spare optical parts are cut overlaps the air layer (AR), support is provided between the light guide film (LGF) and the optical sheet (ST) in response to the pressure applied to the spare optical parts. Since there is no means to do so, the peeling phenomenon may occur. However, in an embodiment of the present invention, the reinforcing part 50 is arranged to overlap the position where the spare optical parts are cut, and the reinforcing part 50 is used to form a space between the light guide film LGF and the optical sheet ST. Since is supported, the peeling phenomenon can be prevented from occurring.

The diffusion layer DL is disposed on the base film BS, and the diffusion layer DL faces the optical patterns TL with the base film BS interposed therebetween. The diffusion layer DL diffuses light that sequentially passes through the optical patterns TL and the base film BS. Accordingly, after the light is concentrated in the front direction of the display panel 200 by the optical patterns TL, the light may be diffused in the front direction by the diffusion layer DL.

As described above, when the preliminary optical sheet and the preliminary light guide film are cut simultaneously to manufacture the optical component 300, the outer surface (BSS) of the base film on one side of the optical component 300, The outer surface 50S of the reinforcement part and the incident surface LS1, which is the outer surface of the light guide film, may be located on one virtual surface SS0. This may mean that the virtual surface SS0 is a cutting surface where the preliminary optical sheet and the preliminary light guide film are cut simultaneously.

In this embodiment, the diffusion layer DL may include a binder and diffusion particles dispersed within the binder. The diffusing particles may include a semi-transparent material such as titanium oxide (TiO ₂ ) and aluminum oxide (Al ₂ O ₃ ).

Hereinafter, the structure and function of the optical patterns TL will be described with further reference to FIG. 4 as follows.

FIG. 4 is a diagram explaining the optical function of one of the optical patterns TL shown in FIG. 3A. Since the optical patterns TL have similar structures and optical functions, in describing FIG. 4, the structure and optical functions of one of the optical patterns TL will be described, and the remaining optical patterns TL will be described. Description of patterns is omitted.

Referring to FIGS. 3A and 4, the optical pattern (TL) has an upper surface (S1), a lower surface (S2), and a side surface (SS) connecting the upper surface (S1) to the lower surface (S2). . The upper surface (S1) is in contact with the base film (BS) along the first width (W1), and the lower surface (S2) is in contact with the adhesive layer (AS) across the second width (W2).

In this embodiment, the optical pattern TL has a tapered shape, the width of the optical pattern TL increases as it approaches the upper surface S1, and the width of the optical pattern TL increases as it approaches the upper surface S1. The closer it is to the surface (S2), the smaller it becomes. Accordingly, the first width W1 may be the maximum width of the optical pattern TL, and the second width W2 may be the minimum width of the optical pattern TL.

The side surface (SS) of the optical pattern (TL) is in contact with the air layer (AR). Accordingly, light may be reflected from the side surface (SS) due to a difference in refractive index between the optical pattern (TL) and the air layer (AR) at the side surface (SS).

In this embodiment, the side surface (SS) may have a round shape. More specifically, the side surface (SS) may have a round shape that is convex toward the air layer (AR). Additionally, when defining the tangent line (TLE) of the side surface (SS), in this embodiment, the acute angle (a1) between the tangent line (TLE) and the exit surface (LS3) may be about 30 degrees to about 70 degrees. However, the present invention is not limited to the size of the acute angle (a1), and the size of the acute angle (a1) is the size of the light guide film (LGF) or between the optical pattern (TL) and the light source (LG in FIG. 2). It may change depending on the distance.

The optical function of the optical pattern TL having the above-described structure will be described as follows. The light LT0 that is totally reflected inside the light guide film LGF is divided into a first light LT1 and a second light LT2. The first light LT1 is totally reflected inside the light guide film LGF, passes through the adhesive layer AS, and is incident on the optical pattern TL at a first incident angle a11.

Since the light guide film (LGF), the adhesive layer (AS), and the optical pattern (TL) each contain a polymer material and have a similar refractive index to each other, the first light (LT1) is transmitted through the light guide film (LGF) and the optical pattern (TL). Total reflection at the interface between the adhesive layer (AS) and the interface between the adhesive layer (AS) and the optical pattern (TL) can be minimized. Accordingly, most of the first light LT1 may be incident on the optical pattern TL through the adhesive layer AS.

After the first light LT1 is incident on the optical pattern TL, the first light LT1 is reflected from the side surface SS of the optical pattern TL. As described above, the side surface (SS) is in contact with the air layer (AR), and the air layer (AR) has a smaller refractive index than the optical pattern (TL), so the first light (LT1) is transmitted from the side surface (SS). can induce reflection.

The side surface (SS) has a round shape that is convex toward the air layer (AR). Therefore, when the first light LT1 that reaches the side surface SS in a diagonal direction with respect to the normal line of the light guide film LGF on the side is reflected from the side surface SS, the first light LT1 is reflected from the side surface SS. The traveling direction may be approximately changed to the front direction of the display panel 200. After that, the first light LT1 is diffused as it passes through the diffusion layer TL, and as a result, the first light LT1 may be finally emitted from the optical component 300.

The second light LT2 is totally reflected inside the light guide film LGF, then passes through the adhesive layer AS and is incident on the optical pattern TL at a second incident angle a12. The angle of incidence (a12) is greater than the first angle of incidence (a11). In this case, unlike the first light LT1, the second light LT2 incident on the optical pattern TL may be reflected multiple times from the side surface SS. As the number of times the second light LT2 is reflected from the side surface SS increases, the traveling direction of the second light LT2 may become closer to the front direction of the display panel.

FIG. 5A is a plan view of the optical component 301 and the light emitting unit 100 according to another embodiment of the present invention, and FIG. 5B is a cross-sectional view taken along line III-III′ shown in FIG. 5A. In describing FIGS. 5A and 5B, the reference numerals for the components described above are given together, and duplicate descriptions of the components are omitted.

5A and 5B, the optical component 301 includes a light guide film (LGF), light collection layers (LP), and an optical sheet (ST1), and the optical sheet (ST1) includes a base film (BS). , optical patterns (TL1) and an adhesive layer (AS). Since the optical patterns TL1 have similar structures, the structure of one of the optical patterns TL1 will be described as an example, and descriptions of the remaining optical patterns will be omitted.

In this embodiment, in plan view, the optical pattern TL1 has an upper surface S11, a lower surface S22, and a side surface SS2 connecting the upper surface S11 to the lower surface S22. In this embodiment, the longitudinal direction of each of the upper surface (S11) and the lower surface (S22) is parallel to the second direction (D2), and the width direction of each of the upper surface (S11) and the lower surface (S22) is parallel to the second direction (D2). is parallel to the first direction (D1). That is, in the embodiment previously shown in FIG. 2, the optical pattern (TL in FIG. 2) has the shape of a dot on a plane, but in the embodiment shown in FIGS. 5A and 5B, the optical pattern (TL1) has an elongated shape. The longitudinal direction and the width direction may be defined on each of the upper surface (S11) and the lower surface (S22).

In this embodiment, the optical component 301 further includes a light blocking layer (RL). The light blocking layer RL is disposed on the outer surface 50S of the reinforcement portion 50, and the light blocking layer RL blocks the light LT0. As in this embodiment, when the reinforcement portion 50 includes the first to fourth reinforcement patterns 51, 52, 53, and 54, the light blocking layer RL includes the first to fourth reinforcement patterns 51, 52, 53, and 54. Four reinforcement patterns 51, 52, 53, and 54 are disposed on each outer surface.

The light blocking layer RL is located on the outermost side of the optical component 301. Accordingly, when the light blocking layer RL is omitted from the optical component 301, the outer surface 50S of the reinforcement portion is exposed to the outside, but the optical component 301 includes the light blocking layer RL. In this case, the outer surface 50S of the reinforcement portion 50 is covered by the light blocking layer RL.

In this embodiment, the light blocking layer RL may include a metal material such as silver (Ag) and aluminum (Al). Therefore, when the light LT0 is provided to the light blocking layer RL, the light blocking layer RL reflects the light LT0 so that the light LT0 enters the interior of the optical component 301. Inflow can be prevented.

In another embodiment, the light blocking layer RL may include a polymer material containing titanium oxide or a white pigment, and the light blocking layer RL may reflect the light LT0 so that the light LT0 is It may be prevented from flowing into the optical component 301.

In another embodiment, the light blocking layer RL may include a polymer material including carbon or black pigment. Accordingly, the light blocking layer RL may absorb the light LT0 and prevent the light LT0 from flowing into the optical component 301 .

Figure 6 is a plan view of the optical component 302 and the light emitting unit 100 according to another embodiment of the present invention. Except for the reinforcement portion 50-1 in the optical component 302, the optical component 302 includes the same components as the previously described optical component (300 in FIG. 1B), so in describing FIG. 6 Redundant descriptions of the above components are omitted.

Referring to FIG. 6, the optical component 302 includes a light guide film (not shown), light collection layers (LP), an optical sheet (not shown), and a reinforcement portion 50-1.

In this embodiment, the reinforcement portion 50-1 includes a first reinforcement pattern 50-1, a second reinforcement pattern 52, a third reinforcement pattern 53, and a fourth reinforcement pattern 54. . Each of the second to fourth reinforcement patterns 52, 53, and 54 has a continuous linear shape, and the first reinforcement pattern 50-1 has a plurality of dots arranged in the second direction D2. It can have a shape.

In this embodiment, each of the plurality of dots defining the first reinforcement pattern 50-1 may have a polygonal shape, and in another embodiment, each of the plurality of dots may have a circular or oval shape.

Similar to the previously described embodiments, in this embodiment, the reinforcement portion 50-1 supports the space between the light guide film and the optical sheet of the optical component 302, and thus the optical sheet 302 The light guide film and the optical sheet can be prevented from being separated from each other.

Figure 7 is a cross-sectional view of an optical component 303 according to another embodiment of the present invention. In describing FIG. 7, the reference numerals for the components described above are given together, and duplicate descriptions of the components are omitted.

Referring to FIG. 7, the optical component 303 includes a light guide film (LGF), light collection layers (LP), an optical sheet (TL), and a reinforcement portion 50-2.

In this embodiment, the outer surface of the reinforcement portion 50-2 has a concavo-convex pattern (CXP). Therefore, before the light generated from the light source LG or provided from the outside of the optical component 303 flows into the interior of the optical component 303 through the reinforcement portion 50-2, the light It can be spread by the concavo-convex pattern (CXP). As a result, even if the light flows into the optical component 303, the luminance of the light output from the optical component 303 due to the introduced light can be prevented from becoming non-uniform.

FIG. 8 is a plan view of a display device according to another embodiment of the present invention, and FIG. 9 is a cross-sectional view taken along line IV-IV of FIG. 8. In describing FIGS. 8 and 9, the reference numerals for the components described above are given together, and duplicate descriptions of the components are omitted.

Referring to FIGS. 8 and 9 , the display device includes a display panel 200, a light emitting unit 100, and optical components 304.

In this embodiment, the optical component 304 includes a light guide film (LGF), light collection layers (LP), and an optical sheet (ST1), and the light guide film (LGF) and the optical sheet (ST1) are coupled to each other. It has an integrated shape.

In this embodiment, the optical sheet ST1 includes a base film BS, an adhesive layer AS, optical patterns TL, and reinforcement patterns 60.

As previously described with reference to FIGS. 2 and 3A, the optical patterns TL may include a polymer material having light transparency, and the optical patterns TL may be connected to the base film BS and the light guide. It is disposed between the films (LGF) and combined with the base film (BS) and the light guide film (LGF). Accordingly, the light LT0 provided from the light emitting unit 100 and totally reflected inside the light guide film LGF may be incident on the optical patterns TL, and the light LT0 incident on the optical patterns TL may be incident on the optical patterns TL. The light LT0 may be refracted by the optical patterns TL and focused toward the approximate front of the display panel 200 .

In this embodiment, as the density of the optical patterns TL in the light guide film LGF increases, the amount of light LT0 emitted from the light guide film LGF through the optical patterns TL increases. This can be increased. Accordingly, the density of the optical patterns TL decreases as it approaches the incident surface LS1 of the light guide film LGF, and the density of the optical patterns TL decreases as the density of the optical patterns TL approaches the incident surface LS1 of the light guide film LGF. ), the closer it is, the more it can increase.

The reinforcement patterns 60, like the optical patterns TL, are disposed between the base film BS and the light guide film LGF and are combined with the base film BS and the light guide film LGF. .

In this embodiment, the reinforcement patterns 60 may be arranged to be spaced apart from the optical patterns TL, and each of the reinforcement patterns 60 may have a dot shape on a plane. In FIG. 8, each of the reinforcement patterns 60 is shown as a circle, but each of the reinforcement patterns 60 may have the shape of an elliptical or polygonal dot.

In this embodiment, each of the reinforcement patterns 60 includes a base layer 61 and a reflective layer 62. The base layer 61 may include a polymer having light transparency, and the shape of the base layer 61 may be similar to each shape of the optical patterns TL. More specifically, the base layer 61 has a tapered shape, the width of the base layer 61 increases as it approaches the upper surface (S1-1), and the width of the base layer 61 is The closer it is to the lower surface (S2-1), the smaller it becomes.

The reflective layer 62 is disposed on the lower surface S2-1 of the base layer 61 and between the base layer 61 and the light guide film LGF. Additionally, the reflective layer 62 is adhered to the light guide film (LGF) by the adhesive layer (AS).

In this embodiment, the reflective layer 62 may include a metal material such as silver (Ag) and aluminum (Al). In another embodiment, the reflective layer 62 may include titanium oxide or a polymer material containing white pigment.

The reflective layer 62 reflects light traveling from the light guide film (LGF) toward the reinforcement patterns 60. More specifically, if we define the first light LT0-1 traveling toward the reinforcement patterns 60 through the incident surface LS1, the first light LT0-1 is transmitted through the reinforcement pattern LS1. Instead of being incident on the field 60, the first light LT0-1 is reflected by the reflection layer 62 and is totally reflected again inside the light guide film LGF.

In this embodiment, silver ink (Ag ink) is provided on the surface of the transfer roller, and the transfer roller rolls the lower surface (S2-1) of the base layer 61 so that the silver ink is applied to the base layer 61. ), the reflective layer 62 may be formed.

Unlike the reinforcement patterns 60, if the second light LT0-2 is defined to proceed toward the optical patterns TL through the incident surface LS1, the light as described above with reference to FIG. 4 is defined. As shown, the second light LT0-2 is incident on the optical patterns TL, and the second light LT0-2 incident on the optical patterns TL is the optical component 304. is released outside of.

Referring to the paths of the first light LT0-1 and the second light LT0-2 described above, the optical patterns TL guide the light totally reflected inside the light guide film LGF. Although the light is emitted to the outside of the film (LGF), the reinforcement patterns 60 do not emit the light that is totally reflected inside the light guide film (LGF) to the outside of the light guide film (LGF).

Since the reinforcement patterns 60 and the optical patterns TL are located between the base film BS and the light guide film LGF and are combined with the base film BS and the light guide film LGF, The bonding force between the optical sheet ST1 and the light guide film LGF may be improved by the optical patterns TL and the reinforcement patterns 60 in the optical sheet ST1.

As described above, the density of the optical patterns TL becomes smaller as it approaches the incident surface LS1 of the light guide film LGF, and the density of the optical patterns TL decreases as the density approaches the incident surface LS1 of the light guide film LGF. It can increase as it gets closer to the opposing surface (LS2). Accordingly, the bonding force between the optical sheet (ST1) and the light guide film (LGF) due to the optical patterns (TL) may become weaker as the surface approaches the incident surface (LS1) from the opposing surface (LS2). However, in this embodiment, the bonding force between the optical sheet (ST1) and the light guide film (LGF) is supplemented not only by the optical patterns (TL) but also by the reinforcement patterns 60, and in particular, the reinforcement patterns 60 ), the bonding force between the optical sheet (ST1) and the light guide film (LGF) corresponding to the incident surface (LS1) can be supplemented.

When an imaginary line CL dividing the optical component 304 into two is defined in parallel with the incident surface LS1 and the emission surface LS2 on a plane, in this embodiment, the reinforcement patterns 60 are It may be located between the incident surface LS1 and the virtual line CL. Figure 10 is a plan view of the light source unit 100 and the optical component 305 of a display device according to another embodiment of the present invention. In describing FIG. 10, the reference numerals for the components described above are given together, and duplicate descriptions of the components are omitted.

In the optical component shown in FIG. 9 (304 in FIG. 9), the reinforcement patterns (60 in FIG. 9) are formed on the incident surface of the light guide film (LS1 in FIG. 9) and an imaginary line dividing the light guide film into two (CL in FIG. 9). ) is located between. However, in the optical component 305 shown in FIG. 10, the reinforcement patterns 60 are located from the incident surface LS1 to the opposing surface LS2, and the reinforcement patterns per unit area of the optical component 305 ( The density of 60) increases from the opposing surface LS2 to the incident surface LS1.

As previously explained with reference to FIG. 9, the density of the optical patterns TL decreases as it approaches the opposing surface LS2 from the incident surface LS1 of the light guide film, so that the density of the optical patterns TL decreases as the density of the optical patterns TL increases. The bonding force between the optical sheet and the light guide film of the optical component 305 may become weaker as the surface approaches the incident surface LS1 from the opposing surface LS2. However, in this embodiment, the density of the reinforcement patterns 60 increases as it approaches the incident surface LS1 from the opposing surface LS2 of the light guide film, so that the optical The bonding force between the optical sheet and the light guide film of the component 305 may become stronger as the light guide film approaches the incident surface LS1 from the opposing surface LS2. Therefore, the bonding force between the optical sheet and the light guide film, especially the bonding force between the optical sheet and the light guide film adjacent to the incident surface LS1, can be supplemented by the reinforcement patterns 60, and thus the optical sheet And peeling between the light guide films can be prevented.

Figure 11 is a cross-sectional view of a display device according to another embodiment of the present invention. In describing FIG. 11, reference numerals are used for the components described above, and duplicate descriptions of the components are omitted.

Referring to FIG. 11, the display device includes a display panel 200, an optical component 306, and a light source unit 100, and the optical component 306 includes a light guide film (LGF), light collection layers (LP), and Includes an optical sheet (ST1). Additionally, the optical sheet (ST2) includes a base film (BS), an adhesive layer (AS), optical patterns (TL), reinforcement patterns 60, and a reinforcement portion 50.

That is, in this embodiment, the reinforcement portion 50 previously described with reference to FIGS. 1A and 1B and the reinforcement patterns 60 described with reference to FIGS. 8 and 9 are formed on the base film BS and the light guide film. (LGF) is placed between. Accordingly, the bonding force between the optical sheet ST2 and the light guide film LGF can be further improved by the reinforcement portion 50 and the reinforcement patterns 60, and the optical sheet adjacent to the incident surface LS1 Delamination between (ST2) and the light guide film (LGF) can be prevented.

Although the present invention has been described above with reference to preferred embodiments, those skilled in the art or have ordinary knowledge in the relevant technical field should not deviate from the spirit and technical scope of the present invention as set forth in the claims to be described later. It will be understood that the present invention can be modified and changed in various ways within the scope not permitted. Therefore, the technical scope of the present invention should not be limited to what is described in the detailed description of the specification, but should be defined by the scope of the patent claims.

Claims (20)

display panel;
A light source that generates light; and
Comprising an optical component that receives the light and outputs the provided light toward the display panel,
The optical components are,
a light guide film that guides the light toward the display panel;
An optical sheet coupled to the light guide film and having a base film and optical patterns disposed between the base film and the light guide film to control the direction of travel of the light; and
Comprising a reinforcing part filled between the base film and the light guide film corresponding to the edge of the optical component,
A display device wherein the reinforcement portion includes an outer surface having a concavo-convex pattern. The display device of claim 1, wherein on one side of the optical component, the outer surface of the light guide film, the outer surface of the base film, and the outer surface of the reinforcement portion are positioned on one virtual surface.
delete delete The display device of claim 1, wherein each of the optical patterns has a dot shape on a plane. The display device of claim 1, wherein the reinforcement portion has a linear shape in a plan view. The display device of claim 1, wherein a portion of the reinforcement portion has a linear shape on a plan view, and another portion of the reinforcement portion has a shape in which a plurality of dots are arranged on a plane view. The display device of claim 1, wherein an incident surface facing the light source is defined on the light guide film, and the reinforcement portion extends along the incident surface. The method of claim 8, wherein an opposing surface facing the incident surface and a connection surface connecting the incident surface to the opposing surface are defined in the light guide film, and the reinforcement portion includes at least one of the opposing surface and the connection surface. A display device characterized in that it is further elongated. The method of claim 9, wherein the optical component is:
The display device further includes light collection layers that have a shape that protrudes from the back surface of the light guide film and have a longitudinal direction in a planar view from the incident surface toward the opposing surface. The method of claim 9, wherein the longitudinal direction of each of the optical patterns on a plane is parallel to the longitudinal direction of the incident surface, and the width direction of each of the optical patterns on a plane is parallel with the longitudinal direction of the connecting surface. display device. The method of claim 1, wherein the optical sheet is:
A display device further comprising a diffusion layer disposed on the base film and facing the optical patterns with the base film interposed therebetween. The display device of claim 1, wherein the optical patterns are arranged to be spaced apart from each other between the light guide film and the base film, and an air layer is defined between two adjacent optical patterns. The display device of claim 1, wherein the width of each of the optical patterns increases as the width approaches the base film from the light guide film. The optical sheet of claim 1, wherein:
Further comprising reinforcement patterns disposed between the base film and the light guide film,
Each of the above reinforcement patterns is,
a base layer that has light transparency and is combined with the light guide film and the base film; and
A display device comprising a reflective layer disposed between the base layer and the light guide film. display panel;
A light source that generates light; and
It includes an optical component that outputs the light provided from the light source toward the display panel,
The optical components are,
light guide film; and
It includes an optical sheet coupled to the light guide film,
The optical sheet is,
base film;
Optical patterns disposed between the base film and the light guide film; and
Comprising reinforcement patterns disposed between the base film and the light guide film,
Each of the above reinforcement patterns is,
a base layer having light transparency and disposed between the light guide film and the base film; and
A display device comprising a reflective layer disposed between the base layer and the light guide film and adhered to the light guide film.
delete The method of claim 16, wherein an incident surface facing the light source and an opposing surface facing the incident surface are defined in the light guide film, and a virtual plane dividing the optical component into two is parallel to the incident surface and the opposing surface on a plane. When a line is defined, the number of the reinforcement patterns located between the incident surface and the virtual line on a plane is greater than the number of the reinforcement patterns located between the opposing surface and the virtual line. The method of claim 18, wherein an incident surface facing the light source and an opposing surface facing the incident surface are defined in the light guide film, and the density of the optical patterns per unit area of the optical component is from the incident surface to the opposing surface. A display device characterized in that it increases as it gets closer. The method of claim 16, wherein the optical sheet is:
Further comprising an adhesive layer adhered to the light guide film,
A display device, wherein the lower surface of each of the optical patterns is adhered to the adhesive layer, and the reflective layer of each of the reinforcement patterns is adhered to the adhesive layer.

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