Display panel

Abstract

A display panel is disclosed. The display panel comprises a panel layer; a composite sheet on a rear surface of the panel layer, the composite sheet including a planar portion and an inclined portion; and a housing in which the panel layer and the composite sheet are disposed, where the composite sheet comprises: a first support layer comprising a first material; a first light refractive layer on the first support layer, the first light refractive layer including a second material; a second support layer on the first light refractive layer, the second support layer including a third material formed of the same material as the first material; and a side cover on the inclined portion of the composite sheet, where the side cover includes a first extension material extending from the first material and a second extension material extending from the third material, and where the second extension material covers a side surface of the first light refractive layer and a side surface of the second support layer.

Description

[0001] This application is a divisional application of patent application No. 202211344860.8, filed on October 31, 2022, entitled "Method for producing composite sheet and display panel including the composite sheet".

[0002] Cross-references to related applications

[0003] This application claims priority to Korean Patent Application No. 10-2021-0191443, filed on December 29, 2021, which is incorporated herein by reference in its entirety. Technical Field

[0004] This disclosure relates to a method for producing a composite sheet and a display panel including the composite sheet. More specifically, this disclosure relates to a method for producing a composite sheet capable of preventing or at least reducing moisture penetration by forming side covers, and a display panel including the composite sheet. Background Technology

[0005] Liquid crystal displays (LCDs) are among the most widely used display devices. Typically, an LCD device includes a liquid crystal display panel, which comprises a light source and a liquid crystal layer.

[0006] In order to make the light moving from the light source to the liquid crystal display panel evenly distributed across the entire liquid crystal display panel, optical sheets with multiple thick layers and diffuser plates with relatively large thicknesses are used.

[0007] The optical sheet can be configured with multiple prisms arranged in a triangular prism shape. In this case, spaces are formed between the prisms. Moisture can easily seep into these spaces. When moisture seeps into the optical sheet, it diffuses throughout the entire sheet due to capillary action. As a result, the optical sheet's performance is reduced, and the screen quality of the display panel deteriorates. Summary of the Invention

[0008] This disclosure addresses the above-mentioned problems and provides a method for producing composite sheets and a display panel including the composite sheet, which can reduce or prevent quality degradation by preventing or at least reducing the penetration of moisture into the optical sheet.

[0009] In one embodiment, a method for producing a composite sheet includes: forming a first support layer; forming a light-refracting layer on the first support layer, the light-refracting layer including a plurality of light-refracting elements; forming a second support layer on the light-refracting layer, wherein the first support layer, the light-refracting layer and the second support layer together form a composite sheet; attaching the composite sheet to the rear surface of a panel layer; and obliquely cutting the composite sheet by irradiating it with a laser beam that penetrates the second support layer, the light-refracting layer and the first support layer, the irradiation of the laser beam covering an opening at the edge of the light-refracting layer.

[0010] In one embodiment, the display panel includes: a panel layer; a composite sheet on the rear surface of the panel layer, the composite sheet including a planar portion and a sloped portion; and a housing in which the panel layer and the composite sheet are disposed, wherein the composite sheet includes: a first support layer on the rear surface of the panel layer, the first support layer including a first material; a light-refracting layer on the rear surface of the first support layer, the light-refracting layer including a second material; a second support layer on the rear surface of the light-refracting layer, the second support layer including the first material; and a side cover on the sloped portion of the composite sheet, the side cover covering an opening at the edge of the light-refracting layer.

[0011] In one embodiment, the composite sheet includes: a first support layer comprising a first material; a light-refracting layer on the first support layer comprising a plurality of light-refracting elements of a second material different from the first material; a second support layer on the light-refracting layer comprising the first material; and a side cover disposed at an angle on the first support layer, the light-refracting layer, and the second support layer, the side cover covering an opening at the edge of the light-refracting layer due to the shape of the plurality of light-refracting elements.

[0012] In the composite sheet according to this disclosure, the side cover can reduce or prevent moisture penetration.

[0013] The composite sheet according to this disclosure can reduce or prevent the degradation of the screen quality of the display panel. Attached Figure Description

[0014] Figure 1 This is an exploded perspective view showing a display panel according to an embodiment of the present disclosure;

[0015] Figure 2 It is based on the implementation of this disclosure. Figure 1 A cross-sectional view taken from line II in the diagram;

[0016] Figure 3 This is an implementation method based on the content of this disclosure. Figure 2 Enlarged views of parts B and C in the image;

[0017] Figures 4 to 6 This is a view illustrating a method for producing composite sheets according to an embodiment of the present disclosure;

[0018] Figure 7 This is a perspective view showing a composite sheet according to an embodiment of the present disclosure;

[0019] Figures 8 to 10 It is along Figure 7 A cross-sectional view taken by cutting line A-A' in the composite sheet;

[0020] Figure 11It is based on the implementation of this disclosure. Figure 7 A cross-sectional view taken from the cutting line B1-B1' in the composite sheet;

[0021] Figure 12 It is based on the implementation of this disclosure. Figure 7 A cross-sectional view taken from the cutting line B2-B2' in the composite sheet;

[0022] Figure 13 This is a perspective view showing a composite sheet according to another embodiment of the present disclosure;

[0023] Figure 14 This is an implementation method based on the content of this disclosure. Figure 13 An enlarged view of part D of the composite sheet shown;

[0024] Figure 15 This is a perspective view showing a composite sheet according to another embodiment of the present disclosure;

[0025] Figure 16 The following embodiments according to this disclosure are shown. Figure 15 The cross-section of the composite sheet in the E-E' direction;

[0026] Figure 17 This is a perspective view showing a composite sheet according to another embodiment of the present disclosure; and

[0027] Figure 18 The following embodiments according to this disclosure are shown. Figure 17 The cross section of the composite sheet in the F-F' direction. Detailed Implementation

[0028] In the following description, embodiments will be illustrated with reference to the accompanying drawings. In this document, when a component (or region, layer, portion, etc.) is referred to as being "on another component," "connected to," or "coupled to" another component, this may mean that the component can be directly connected to / coupled to the other component, or that a third component may be disposed therein.

[0029] The same reference numerals refer to the same parts. Throughout the drawings, the thickness, proportions, and dimensions of parts are enlarged for effective description of technical matters. "And / or" may include one or more combinations that can be defined by the related parts.

[0030] Various components may be described using terms such as first, second, etc., but these components are not limited to these terms. These terms may be used for the purpose of distinguishing one component from another. For example, without departing from the scope of the claims described herein, a first element may be named a second element, and similarly, a second element may be named a first element. Singular forms include plural forms unless the context clearly indicates otherwise.

[0031] Terms such as "below," "under," "above," and "over" are used to describe the relationships between the components shown in the accompanying drawings. These terms have related concepts and are described based on the directions shown in the drawings.

[0032] The terms “comprising,” “having,” etc., indicate the presence of the features, numbers, steps, operations, elements, parts, or combinations thereof described herein, and do not exclude the presence or addition of one or more other features, numbers, steps, operations, elements, parts, or combinations thereof.

[0033] Furthermore, for ease of description, this disclosure will be described as an exemplary liquid crystal display (LCD) panel. However, the spirit of this disclosure is not limited to liquid crystal display panels, but can be equally applied to other types of display panels, such as organic light-emitting display panels, mini LED display panels, etc.

[0034] Furthermore, for ease of description, this disclosure will be exemplarily described with respect to direct-light type liquid crystal display panels. However, the spirit of this disclosure can also be applied to other types, such as side-light type liquid crystal display panels.

[0035] Figure 1 This is an exploded perspective view showing a display panel according to an embodiment of the present disclosure. Figure 2 It is based on the implementation of this disclosure. Figure 1 The cross-sectional view taken from line II in the diagram. Figure 3 This is an implementation method based on the content of this disclosure. Figure 2 Enlarged views of parts B and C in the image.

[0036] Reference Figures 1 to 3 A display panel is described according to an embodiment of this disclosure.

[0037] The display panel according to this disclosure may include a panel layer 100, a composite sheet 200, a backlight driver 300, and a housing 400.

[0038] The panel layer 100 may include a lower substrate 130 with switching elements, an upper substrate 120 disposed on the lower substrate 130, and an upper polarizing film 110 disposed on the upper part of the upper substrate 120 and a lower polarizing film 140 disposed on the lower part of the lower substrate 130. The display panel may be a liquid crystal panel, and the panel layer 100 may include a liquid crystal layer. In the lower substrate 130, pixels may be formed in each intersection region of the gate line and the data line. A pixel may include a thin-film transistor, a common electrode, and a pixel electrode. The thin-film transistor may be used as a switching device to transmit electrical signals to each pixel and control the electrical signals. A common voltage for driving the liquid crystal is applied to the common electrode. The pixel electrode may be disposed on a passivation layer covering the common electrode and connected to the thin-film transistor. The upper substrate 120 may include a color filter and a black matrix. R (red), G (green), and B (blue) patterns may be formed on the color filter. The black matrix may be disposed between the R, G, and B patterns of the color filter. Columnar spacers for maintaining cell gaps may be disposed between the upper substrate 120 and the lower substrate 130.

[0039] The upper polarizing film 110 can be attached to the upper part of the upper substrate 120, and the lower polarizing film 140 can be disposed on the lower part of the lower substrate 130. The upper polarizing film 110 and the lower polarizing film 140 can have different polarization functions by stretching processes performed in opposite directions, and can have contraction forces in opposite directions depending on the stretching. Due to the opposite contraction forces, the panel layer 100 can achieve a planar state without bending upward or downward.

[0040] Composite sheet 200 can be formed on the rear surface of panel layer 100. The rear surface refers to the downward direction of the display panel, specifically the -Z axis direction. For example... Figure 2 As shown, an adhesive layer AH is formed on the rear surface (-Z direction) of the lower polarizing film 140 formed on the lower part of the panel layer 100, and the composite sheet 200 can be attached to the rear surface of the adhesive layer AH.

[0041] The adhesive layer AH can be, for example, a pressure-sensitive adhesive PSA or an optically transparent adhesive OCA, and can be a transparent material to allow light emitted from the light source module 320 to pass through it.

[0042] The composite sheet 200 may include a first support layer 210, a light-refracting layer 220, a second support layer 230, and a side cover 270. Specifically, the first support layer 210 may be formed on the rear surface of the panel layer 100 and may be formed of a first material. For example, the first material may be polyethylene terephthalate (PET). The light-refracting layer 220 may be formed on the rear surface of the first support layer 210. The light-refracting layer 220 may refract light emitted from the lower light source module 320 and diffuse the light upward. The light-refracting layer 220 may include a plurality of prisms 221 arranged at regular intervals. The light-refracting layer 220 may be formed of a second material. That is, the plurality of prisms 221 may be formed of a second material. For example, the second material may be a transparent material, such as glass or plastic. The second support layer 230 may be formed on the rear surface of the light-refracting layer 220. The second support layer 230 may be formed of a first material that is the same material as the first support layer 210. That is, in one example, the second support layer 230 may be formed of PET material.

[0043] In this disclosure, the materials constituting the support layers 210 and 230 are referred to as the "first material," and the material constituting the light-refracting layer 220 is referred to as the "second material." The first material and the second material may be different from each other or the same as each other.

[0044] Reference Figure 3 The composite sheet 200 may include a planar portion P and an inclined portion S. Specifically, the inclined portion S may be formed along the outer peripheral surface of the composite sheet 200 (e.g., at the edge of the composite sheet 200). Additionally, the inclined portion S may be formed in a closed-loop shape. The planar portion P may be the remaining portion of the composite sheet 200 other than the inclined portion S, and may be a planar portion having a shape that is horizontal relative to the XY plane. The planar portion P lies between the inclined portions S. The inclined portion S of the composite sheet 200 may be formed in an inverted conical shape. For example, see reference... Figure 2 and Figure 3 The composite sheet 200 may have an inverted conical shape, wherein the width of the upper surface is greater than the width of the lower surface. Here, the upper surface of the composite sheet 200 may refer to the upper surface of the first support layer 210, and the lower surface of the composite sheet 200 may refer to the lower surface of the second support layer 230.

[0045] Side cover 270 can be formed on the inclined portion S. Side cover 270 can be formed along the periphery of composite sheet 200. Therefore, side cover 270 can be formed along the side surface of composite sheet 200 in the XY plane. Therefore, side cover 270 can be formed in a closed-loop shape. Side cover 270 can close (e.g., cover) a space H that can be formed in light refractive layer 220. Specifically, when light refractive layer 220 includes a plurality of prisms 221, due to the triangular shape of prisms 221, space H can be an opening formed between prisms 221. Such a space can be an exposed space in the periphery (e.g., edge) of composite sheet 200. Moisture may seep into this space H. In addition, due to capillary action, moisture may diffuse throughout composite sheet 200, which leads to degradation of the display panel quality. Side cover 270 according to this disclosure can be used to cover such a space H. Side cover 270 will be described in detail below.

[0046] like Figure 3 As shown, the size of the prism 221 located in the outermost region can differ from the size of the prisms 221 located in the other regions between the outermost regions of the composite sheet 200. For example, the prism 221 located in the outermost region can have the smallest size among the prisms 221. (Refer to...) Figure 3 The width of the prism 221 located in the outermost region can be smaller than the width of the prism 221 located in the central region of the composite sheet 200. Specifically, the width of the prism 221 adjacent to the side cover 270 can be smaller than the width of the prism 221 located at the position corresponding to the central region of the panel.

[0047] Return to reference Figure 2 The composite sheet 200 can be directly attached to the rear surface of the panel layer 100. Direct attachment may mean that there is no space between the composite sheet 200 and the panel layer 100. Figure 2 As shown, the composite sheet 200 can be directly attached to the panel layer 100 via the adhesive layer AH. In contrast to this disclosure, in conventional technology, the composite sheet 200 and the panel layer 100 are typically spaced apart by a predetermined distance to ensure a predetermined optical path. Unlike conventional technology, the display panel of this disclosure, based on its structural characteristics, ensures that light passing through the composite sheet 200 is sufficiently diffused; therefore, the composite sheet 200 can be directly attached without needing to be separated from the panel layer 100.

[0048] Meanwhile, as described below, the housing 400 may include at least one of a housing top 410, a guide panel 420, and a cover bottom 430. Since the optical layers and diffuser plates included in a conventional display panel are thick and heavy, the housing that forms the appearance of the display panel must support the diffuser plate in the vertical direction. For example, there is a general structure in which the guide panel has a protrusion or horizontal portion projecting in the horizontal direction, and the optical layer or diffuser plate is supported in the vertical direction by the protrusion or horizontal portion. When a conventional display panel is exposed to high or low temperature environments, the display panel, optical layers, and diffuser plate shrink or expand. The problem is that the brightness of the light decreases because the degree of shrinkage or expansion of the display panel differs from the degree of shrinkage or expansion of the optical layers or diffuser plate. Furthermore, the problem exists that the diffuser plate is damaged due to friction caused by shrinkage and expansion at the portions where the diffuser plate and the housing contact each other (so that the diffuser plate is supported by the housing).

[0049] According to this disclosure, the composite sheet 200 can be directly attached to the panel layer 100. Therefore, the composite sheet 200 can be configured to be non-contact with the housing 400. That is, the composite sheet 200 does not contact the housing 400. Even when the display panel is exposed to high or low temperature environments, the degree of contraction or expansion of the panel layer 100 is the same as the degree of contraction or expansion of the composite sheet 200, thus reducing or preventing brightness reduction problems. Furthermore, since the composite sheet 200 according to this disclosure does not need to be supported by the housing 400, friction with the housing 400 will not occur when the composite sheet 200 contracts or expands.

[0050] The backlight driver 300 may include a lens 310, a light source module 320, a backlight circuit unit 330, and a reflector 340.

[0051] Each light source module 320 is arranged side-by-side to space it from each other. The light source modules 320 illuminate the lower surface of the panel layer 100. Each light source module 320 can emit light simultaneously or individually according to a light source drive signal output from the backlight driver 330. For example, the light source modules 320 can use local dimming to partially control brightness. According to an example, the light source modules 320 can be formed by a chip-scale package and can be directly mounted on the upper surface of the backlight circuit unit 330.

[0052] Lens 310 can be disposed on light source module 320, and thus can diffuse light incident from light source module 320. Lens 310 can be formed aspherical, and therefore can have optical axis asymmetry. Lens 310 can prevent or at least reduce aberrations by having an aspherical surface. For example, lens 310 can be configured to prevent or at least reduce hot spots and diffuse light by forming the upper surface into an elliptical shape and the central portion of the lower surface into a conical shape.

[0053] The reflector 340 is positioned below the light source module 320 and can be formed of a material with reflective properties. A portion of the light emitted from the light source module 320 can travel in a downward direction, and the reflector 340 can reflect such light in an upward direction.

[0054] The housing 400 may include a top housing 410, a guide panel 420, and a bottom cover 430. The bottom cover 430 may define the lower portion of the display panel. The bottom cover 430 may house the backlight circuit unit 330 on its upper portion. The guide panel 420 may be coupled to a side surface of the bottom cover 430. The top housing 410 may define the side portion of the display panel. The top housing 410 may be coupled to a side surface of the guide panel 420. The top housing 410 may partially cover the upper portion of the panel layer 100. For this purpose, an adhesive member 150 may be inserted between the top housing 410 and the panel layer 100.

[0055] As described above, the housing 400 according to this disclosure does not contact the composite sheet 200. That is, the housing 400 may not have a structure for supporting the composite sheet 200. For example, a guide panel of a conventional display panel, wherein the guide panel has a horizontal portion or protrusion supporting the panel layer, may be omitted. For another example, the guide panel 420 according to this disclosure may not include a horizontal portion or protrusion for supporting the panel layer 100.

[0056] Figures 4 to 6 This is a view illustrating a method for producing composite sheets according to embodiments of the present disclosure. Specifically, Figure 4 This is a perspective view of the production of a composite sheet according to an embodiment of this disclosure. Figure 5 This is a plan view taken from the XZ plane when producing a composite sheet according to an embodiment of this disclosure, and Figure 6 This is a plan view taken from the YZ plane when producing a composite sheet according to an embodiment of this disclosure.

[0057] Reference Figures 4 to 6 A method for producing composite sheets according to embodiments of the present disclosure is described.

[0058] First, refer to Figure 4 The composite sheet 200P, including the first support layer 210P, the light refraction layer 220P, and the second support layer 230P, can be attached to the rear surface of the panel layer 100.

[0059] Specifically, the first support layer 210P can be a planar layer including a first material. For example, the first material can be PET material.

[0060] The light-refracting layer 220P can be formed on the first support layer 210P. The light-refracting layer 220P can include a plurality of light-refracting elements 221 and can be a planar layer. For example, the light-refracting element 221 can be a prism. The light-refracting layer 220P can be formed of a second material. That is, the light-refracting element 221 can be formed of a second material. In other words, the prism 221 can be formed of a second material.

[0061] The second support layer 230P can be formed on the light-refracting layer 220P. The second support layer 230P can be a planar layer including the first material. For example, the first material can be PET material.

[0062] The composite sheet 200P thus formed can have a space H exposed on its side surface. When the light refraction element is exemplarily described as a prism 221, an unfilled space H may exist between a particular prism 221 and adjacent prisms 221, and this space H may be exposed on the side surface of the composite sheet 200P. As mentioned above, this space H may lead to problems with moisture seepage.

[0063] The composite sheet 200P formed as described above can be attached to the rear surface of the panel layer 100. The rear surface refers to the downward direction of the display panel and can be a reference surface. Figure 4 In the Z-axis direction. For example, composite sheet 200P can be inserted onto adhesive layer AH applied to the rear surface of panel layer 100, and adhesive layer AH can be cured. Adhesive layer AH can be OCA material or PSA material.

[0064] The composite sheet 200P can be obliquely cut by irradiating it with a laser beam L that penetrates the second support layer 230P, the light-refracting layer 220P, and the first support layer 210P. (Refer to...) Figure 4 The laser beam L can be directed above the composite sheet 200P and move along the cutting line CL. (See reference...) Figure 5 and Figure 6 The laser beam L can irradiate light at a predetermined angle relative to the vertical direction (Z-axis). The irradiated light can have a wavelength capable of melting the second support layer 230P, the light-refracting layer 220P, and the first support layer 210P. Furthermore, because the laser beam L is tilted at a predetermined angle, the cross-section of the cut composite sheet 200P can have an inclined portion relative to the vertical direction (Z-axis). In one embodiment, the predetermined angle relative to the X-axis is greater than 0 degrees and less than 90 degrees.

[0065] In the above-described inclined cutting step, at least one of the second support layer 230P, the light-refracting layer 220P, and the first support layer 210P can be melted, and a side cover can be formed by melting (see...). Figure 7(e.g., 270 in the example). According to this disclosure, the inclined cutting step can have the following technical significance. As mentioned above... Figures 2 to 3 As described, the composite sheet 200 according to this disclosure may have a slanted portion S at its edge. See below for reference. Figure 7 As will be described, the side cover 270 formed on the inclined portion S may include a first extended material formed by melting and extending a first material of the first support layer 210P, a second extended material formed by melting and extending a second material of the light-refracting layer 220P, and a third extended material formed by melting and extending a first material of the second support layer 230P. The molten first, second, or third extended material can be solidified while flowing downward along the inclined surface to form the side cover. The side cover formed in this way can be used to enclose the space H exposed at the side surface of the composite sheet 200P. Unlike what is presented in this disclosure, when a vertical cut is performed, such as by irradiating a laser beam L in the vertical direction (Z-axis direction), the composite sheet 200P will be divided into left and right only relative to the vertical plane irradiated by the laser beam L, and the first, second, or third extended material to be formed on the inclined portion S will not be formed thereon. Furthermore, unlike what is presented in this disclosure, when vertical cutting is performed using a laser beam L, the molten first or second extension material may fall due to gravity and deposit only on the first support layer 210P, without depositing on the light-refracting layer 220P. Therefore, the space exposed on the side surface of the composite sheet 200P may not be properly sealed. According to this disclosure, by obliquely cutting the composite sheet 200P, a side cover capable of sealing all spaces H can be formed.

[0066] In addition, refer to Figure 4 The side cover can be formed to create a closed loop along the periphery of the composite sheet 200P. That is, the laser beam L can move along the cutting line CL, thereby forming a closed loop along the periphery of the composite sheet 200P, and thus the side cover can be formed to create a closed loop along the periphery of the composite sheet 200P. Therefore, the space H exposed at the side surface of the composite sheet 200P can be completely enclosed or covered.

[0067] Additionally, refer to Figure 4The side cover can be formed such that circles R1, R2, R3, and R4 are formed at the corners of the composite sheet 200P. That is, the laser beam L can move along the cutting line CL, which draws circles R1, R2, R3, and R4 at the four corners of the plane of the composite sheet 200P. According to this disclosure, forming circles at the corners of the composite sheet 200P has the following technical advantages. When the laser beam L does not move along with drawing circles at the corners, the composite sheet 200P receives the laser beam twice at the corners. For example, when the laser beam L moves counterclockwise, corner R1 receives the laser beam once in the -Y axis direction and once again in the X axis direction. The two receptions of the laser beam can also occur in the remaining corners R2, R3, and R4. Therefore, the panel layer 100 inserted below the composite sheet 200P is irradiated twice by the laser beam at the corners. This may result in damage to the panel layer 100 from multiple laser beam irradiations. Furthermore, since two melting processes occur at the corners of the composite sheet 200P, the side cover may form irregularly. According to this disclosure, by forming the side cover in a manner that forms circular R1, R2, R3, and R4 at the corners of the composite sheet 200P, damage to the panel layer 100 can be reduced or prevented, and the problem of irregular formation of the side cover can be prevented.

[0068] Figure 7 This is a perspective view showing a composite sheet according to an embodiment of the present disclosure. Figures 8 to 10 It is based on the implementation of this disclosure. Figure 7 The cross-sectional view taken by the cutting line A-A' in the composite sheet. Figure 11 It is based on the implementation of this disclosure. Figure 7 The cross-sectional view taken from the cutting line B1-B1' in the composite sheet. Figure 12 It is based on the implementation of this disclosure. Figure 7 The cross-sectional view taken from the cutting line B2-B2' in the composite sheet.

[0069] Reference Figures 7 to 12 A composite sheet is described according to an embodiment of the present disclosure.

[0070] The composite sheet 200 may include a first support layer 210, a light refraction layer 220, a second support layer 230, and a side cover 270. Figure 7 This is a perspective view, and the side cover 270 formed around the outer peripheral surface of the composite sheet 200 is omitted. (Refer to...) Figures 8 to 12 Description of side cover 270.

[0071] The first support layer 210 may be formed on the rear surface of the panel layer 100. The rear surface refers to the downward direction of the display panel 100, and may be a reference surface. Figure 7In the Z-axis direction. The first support layer 210 can be attached to the rear surface of the panel layer 100 via the adhesive layer AH. The adhesive layer AH can be a transparent material, such as PSA or OCA.

[0072] The first support layer 210 may be formed of a first material. The first material may be PET.

[0073] A light-refracting layer 220 may be formed on the rear surface of the first support layer 210. The light-refracting layer 220 may refract light emitted from the lower light source module and diffuse the light upwards. The light-refracting layer 220 may include a plurality of prisms 221 arranged at regular intervals. The light-refracting layer 200 may be formed of a second material. That is, the plurality of prisms 221 may be formed of a second material. For example, the second material may be a transparent material, such as glass or plastic. The first material and the second material may be the same material or different materials.

[0074] The second support layer 230 can be formed on the rear surface of the light-refracting layer 220. The second support layer 230 can be formed of a first material that is the same material as the first support layer 210. That is, the second support layer 230 can be formed of PET material.

[0075] like Figures 8 to 12 As shown, the composite sheet 200 may include an inclined portion S and a planar portion P. A side cover 270 may be formed on the inclined portion S. The inclined portion S may be formed along the outer peripheral surface of the composite sheet 200. The inclined portion S may be formed in a closed-loop shape around the periphery of the composite sheet 200. The planar portion P may be a portion other than the inclined portion S of the composite sheet 200, and may be a planar portion extending horizontally relative to the XY plane. The inclined portion S of the composite sheet 200 may have an inverted conical shape in the Z-axis direction. That is, the width of the upper surface of the composite sheet 200 (the surface in contact with the panel layer 100) may be longer than the width of the lower surface. The side cover 270 may close all spaces H exposed to the outside along the periphery of the composite sheet 200. This will be referred to below. Figures 8 to 12 Describe it.

[0076] Return to reference Figure 7 The side cover 270 may have circular shapes R1, R2, R3, and R4 at the corners of the composite sheet 200. Because the side cover 270 has circular shapes R1, R2, R3, and R4, damage to the panel layer 100 that may occur during laser beam cutting can be reduced or prevented. Furthermore, the side cover 270 with circular shapes R1, R2, R3, and R4 can prevent surface irregularities that may occur during laser beam cutting.

[0077] Figures 8 to 10 It is based on various implementation methods. Figure 7The cross-sectional view taken by the cutting line A-A' in the composite sheet. Figure 11 It is based on one implementation method along Figure 7 The cross-sectional view taken from the cutting line B1-B1' in the composite sheet. Figure 12 It is based on one implementation method along Figure 7 A cross-sectional view taken from the cutting line B2-B2' in the composite sheet. Figures 8 to 12 In the description, descriptions that are repeated above will be omitted.

[0078] Reference Figure 8 A composite sheet 200 is shown attached to the rear surface of a panel layer 100 via an adhesive layer AH. The composite sheet 200 may include a planar portion P and a sloped portion S. The composite sheet 200 may include, in the planar portion P, a first support layer 210 formed on the rear surface of the panel layer 100 and made of a first material, a light-refracting layer 220 formed on the rear surface of the first support layer 210 and made of a second material, and a second support layer 230 formed on the rear surface of the light-refracting layer 220 and made of the first material. The composite sheet 200 may also include a side cover 270 formed on the sloped portion S. The side cover 270 may include a first extension material 210S and a third extension material 230S. The first extension material 210S may be a material formed by melting the material of the first support layer 210 and extending it into the sloped portion S. The first extension material 210S may be a first material constituting the first support layer 210. The third extension material 230S may be a material formed by melting the material of the second support layer 230 and extending it into the sloped portion S. The third extension material 230S can be the first material constituting the second support layer 230. The space H formed on the side surface of the composite sheet 200 can be completely closed by the side cover 270 formed in this way. Since the side cover 270 is formed in a closed-loop shape along the periphery of the side surface of the composite sheet 200, the composite sheet 200 can be completely sealed. Therefore, any inflow of moisture that could permeate through the space H can be completely blocked.

[0079] At the same time, Figure 8 In the cross-sectional view shown, the second material constituting the light-refracting layer 220 may not melt. For example, the cutting line CL of the laser beam may be formed so as not to pass through the prism 221. For another example, the laser beam may have a wavelength that melts only the support layers 210 and 230 without melting the prism 221. Therefore, the side cover 270 may include a third extension material 230S formed to penetrate the light-refracting layer 220 and the first support layer 210. That is, when assuming a virtual line VL1 between the second support layer 230 and the light-refracting layer 220 and assuming a virtual line VL2 between the light-refracting layer 220 and the first support layer 210, the third extension material 230S may be formed to penetrate (e.g., pass through) the virtual lines VL1 and VL2.

[0080] Reference Figure 9 A composite sheet 200 is shown attached to the rear surface of a panel layer 100 via an adhesive layer AH. The composite sheet 200 may include a planar portion P and a sloped portion S. The composite sheet 200 may include, in the planar portion P, a first support layer 210 formed on the rear surface of the panel layer 100 and made of a first material, a light-refracting layer 220 formed on the rear surface of the first support layer 210 and made of a second material, and a second support layer 230 formed on the rear surface of the light-refracting layer 220 and made of the first material. The composite sheet 200 may also include a side cover 270 formed on the sloped portion S. The side cover 270 may include a first extension material 210S, a second extension material 220S, and a third extension material 230S. The first extension material 210S may be a material formed by melting the material of the first support layer 210 and extending it into the sloped portion S. The first extension material 210S may be a first material constituting the first support layer 210. The second extension material 220S may be a material formed by melting the material of the light-refracting layer 220 and extending it into the sloped portion S. The second extending material 220S can be a second material constituting the light-refracting layer 220 or the prism 221. The third extending material 230S can be a material formed by melting the material of the second support layer 230 and extending it towards the inclined portion S. The third extending material 230S can be a first material constituting the second support layer 230. The space H formed on the side surface of the composite sheet 200 can be completely closed by the side cover 270 formed in this way. Since the side cover 270 is formed in a closed-loop shape along the periphery of the side surface of the composite sheet 200, the composite sheet 200 can be completely sealed. Therefore, any inflow of moisture that can permeate through the space H can be completely blocked.

[0081] At the same time, Figure 9 In the cross-sectional view shown, with Figure 10 Compared to the cross-sectional view, the second material constituting the light-refracting layer 220 can be melted relatively less, as will be described below. For example, the cutting line CL of the laser beam can be formed such that a small portion of the prism 221 remains on the inclined portion S, and the majority of the prism 221 remains on the planar portion P. Therefore, the side cover 270 may include a third extension material 230S formed to penetrate (e.g., through) the light-refracting layer 220 and the first support layer 210, and a second extension material 220S formed to penetrate the first support layer 210. That is, when assuming a virtual line VL1 between the second support layer 230 and the light-refracting layer 220 and assuming a virtual line VL2 between the light-refracting layer 220 and the first support layer 210, the third extension material 230S can be formed to penetrate (e.g., through) the virtual lines VL1 and VL2. Furthermore, the second extension material 220S can be formed to penetrate the virtual line VL2.

[0082] Reference Figure 10 A composite sheet 200 is shown attached to the rear surface of a panel layer 100 via an adhesive layer AH. The composite sheet 200 may include a planar portion P and a sloped portion S. The composite sheet 200 may include, in the planar portion P, a first support layer 210 formed on the rear surface of the panel layer 100 and made of a first material, a light-refracting layer 220 formed on the rear surface of the first support layer 210 and made of a second material, and a second support layer 230 formed on the rear surface of the light-refracting layer 220 and made of the first material. The composite sheet 200 may also include a side cover 270 formed on the sloped portion S. The side cover 270 may include a first extension material 210S, a second extension material 220S, and a third extension material 230S. The first extension material 210S may be a material formed by melting the material of the first support layer 210 and extending it into the sloped portion S. The first extension material 210S may be a first material constituting the first support layer 210. The second extension material 220S may be a material formed by melting the material of the light-refracting layer 220 and extending it into the sloped portion S. The second extending material 220S can be a second material constituting the light-refracting layer 220 or the prism 221. The third extending material 230S can be a material formed by melting the material of the second support layer 230 and extending it towards the inclined portion S. The third extending material 230S can be a first material constituting the second support layer 230. The space H formed on the side surface of the composite sheet 200 can be completely closed by the side cover 270 formed in this way. Since the side cover 270 is formed in a closed-loop shape along the periphery of the side surface of the composite sheet 200, the composite sheet 200 can be completely sealed. Therefore, any inflow of moisture that can permeate through the space H can be completely blocked.

[0083] At the same time, Figure 10 In the cross-sectional view shown, with Figure 9 Compared to the cross-sectional view, the second material constituting the light-refracting layer 220 can be melted in greater quantities. For example, the cutting line CL of the laser beam can be formed such that most of the prism 221 remains on the inclined portion S, and a small portion of the prism 221 remains on the planar portion P. Therefore, the side cover 270 may include a third extension material 230S formed to penetrate the light-refracting layer 220 and a second extension material 220S formed to penetrate the first support layer 210. Figure 9 Compared to the cross-sectional view, the third extended material 230S differs in that it does not intrude (e.g., penetrate) the first support layer 210. That is, in Figure 10 In, with Figure 9In contrast, a relatively large amount of the second material is melted, so the second extension material 220S can be formed to be wider, and thus, the third extension material 230S can be formed on the upper part of the material 220S, such that the second extension material 220S is between the first extension material 210S and the third extension material 230S.

[0084] In other words, when assuming a virtual line VL1 between the second support layer 230 and the light-refracting layer 220, and assuming a virtual line VL2 between the light-refracting layer 220 and the first support layer 210, the third extension material 230S can be formed to penetrate the virtual line VL1 but not the virtual line VL2. Furthermore, the second extension material 220S can be formed to penetrate the virtual line VL2. That is, the third extension material 230S can be formed without penetrating the virtual line VL2.

[0085] Reference Figure 11 A composite sheet 200 is shown attached to the rear surface of a panel layer 100 via an adhesive layer AH. The composite sheet 200 may include a planar portion P and a sloped portion S. The composite sheet 200 may include, in the planar portion P, a first support layer 210 formed on the rear surface of the panel layer 100 and made of a first material, a light-refracting layer 220 formed on the rear surface of the first support layer 210 and made of a second material, and a second support layer 230 formed on the rear surface of the light-refracting layer 220 and made of the first material. The composite sheet 200 may also include a side cover 270 formed on the sloped portion S. The side cover 270 may include a first extension material 210S, a second extension material 220S, and a third extension material 230S. The first extension material 210S may be a material formed by melting the material of the first support layer 210 and extending it into the sloped portion S. The first extension material 210S may be a first material constituting the first support layer 210. The second extension material 220S may be a material formed by melting the material of the light-refracting layer 220 and extending it into the sloped portion S. The second extending material 220S can be a second material constituting the light-refracting layer 220 or the prism 221. The third extending material 230S can be a material formed by melting the material of the second support layer 230 and extending it towards the inclined portion S. The third extending material 230S can be a first material constituting the second support layer 230. The space H formed on the side surface of the composite sheet 200 can be completely closed by the side cover 270 formed in this way. Since the side cover 270 is formed in a closed-loop shape along the periphery of the side surface of the composite sheet 200, the composite sheet 200 can be completely sealed. Therefore, any inflow of moisture that can permeate through the space H can be completely blocked.

[0086] At the same time, due to Figure 11 The cross-sectional view shown is along Figure 7The cross-sectional view is in the direction B1-B1', therefore the prism 221 is inserted above the entire cross-section of the second refractive layer 220. That is, the cross-section of the second refractive layer 220 in the planar portion P can completely encompass the prism 221. Therefore, the cross-section of the inclined portion S can be... Figure 10 The cross-sections are the same or similar. The cutting line CL of the laser beam can be formed to pass through all portions of the prism 221. Therefore, the side cover 270 may include a third extension material 230S formed to penetrate the light refraction layer 220 and a second extension material 220S formed to penetrate the first support layer 210. That is, the third extension material 230S may only be formed to the upper part of the second extension material 220S. When assuming a virtual line VL1 between the second support layer 230 and the light refraction layer 220 and assuming a virtual line VL2 between the light refraction layer 220 and the first support layer 210, the third extension material 230S may be formed to penetrate only the virtual line VL1. Furthermore, the second extension material 220S may be formed to penetrate the virtual line VL2. That is, the third extension material 230S may be formed not to penetrate the virtual line VL2.

[0087] Reference Figure 12 A composite sheet 200 is shown attached to the rear surface of a panel layer 100 via an adhesive layer AH. The composite sheet 200 may include a planar portion P and a sloped portion S. The composite sheet 200 may include, in the planar portion P, a first support layer 210 formed on the rear surface of the panel layer 100 and made of a first material, a light-refracting layer 220 formed on the rear surface of the first support layer 210 and made of a second material, and a second support layer 230 formed on the rear surface of the light-refracting layer 220 and made of the first material. The composite sheet 200 may also include a side cover 270 formed on the sloped portion S. The side cover 270 may include a first extension material 210S and a third extension material 230S. The first extension material 210S may be a material formed by melting the material of the first support layer 210 and extending it into the sloped portion S. The first extension material 210S may be a first material constituting the first support layer 210. The third extension material 230S may be a material formed by melting the material of the second support layer 230 and extending it into the sloped portion S. The third extension material 230S can be the first material constituting the second support layer 230. The space H formed on the side surface of the composite sheet 200 can be completely closed by the side cover 270 formed in this way. Since the side cover 270 is formed in a closed-loop shape along the periphery of the side surface of the composite sheet 200, the composite sheet 200 can be completely sealed. Therefore, any inflow of moisture that could permeate through the space H can be completely blocked.

[0088] At the same time, due to Figure 12 The cross-sectional view shown is along Figure 7The cross-sectional view in the direction B2-B2' shows that prism 221 is not inserted above the entire second refractive layer 220. Therefore, the cross-section of the inclined portion S can be compared with... Figure 8 The cross-sections are the same or similar. The cutting line CL of the laser beam can be formed so as not to pass through the prism 221. Therefore, the side cover 270 may include a third extension material 230S formed to penetrate the light refraction layer 220 and the first support layer 210. That is, the side cover 270 does not include a second extension material in which the second material of the light refraction layer 220 is melted. When assuming a virtual line VL1 between the second support layer 230 and the light refraction layer 220 and assuming a virtual line VL2 between the light refraction layer 220 and the first support layer 210, the third extension material 230S may be formed to penetrate the virtual lines VL1 and VL2.

[0089] Figure 13 This is a perspective view showing a composite sheet according to another embodiment of the present disclosure. Figure 14 Other embodiments based on this disclosure Figure 13 An enlarged view of part D of the composite sheet shown.

[0090] Reference Figure 13 and Figure 14 Another implementation of the present disclosure is described.

[0091] Figure 13 and Figure 14 With reference Figure 7 The difference in the described embodiment is that the light refraction layer 220 includes hetero prisms 221 and 222. Descriptions that are repeated in the above embodiments will be omitted.

[0092] The composite sheet 200 may include a first support layer 210, a light refraction layer 220, and a side cover 270. Figure 13 This is a perspective view, and the side cover 270 formed around the outer peripheral surface of the composite sheet 200 is omitted. (See reference...) Figures 8 to 12 The description will help you understand the side cover 270.

[0093] A first support layer 210 is formed on the rear surface of the panel layer 100 and can be attached to the rear surface of the panel layer 100 by an adhesive layer AH. The first support layer 210 can be formed of a first material, and the first material can be PET.

[0094] The light-refracting layer 220 may be formed on the rear surface of the first support layer 210. The light-refracting layer 220 may include a plurality of irregularly shaped prisms 221 and 222 arranged at regular intervals.

[0095] The first prism 221 may have a first height H1. The second prism 222 may have a second height H2. Each of the plurality of prisms 221 and 222 may be spaced apart from each other by a predetermined distance P. For example, the height H1 of the first prism 221 may be 70 μm, and the height of the second prism 222 may be 60 μm. The distance P between prisms 221 and 222 may be 35 μm.

[0096] The width W of the first prism 221 can be the same as the width W of the second prism 222. That is, the first prism 221 can have a first width W, and the second prism 222 can also have a first width W. By way of example, the first width W can be 35 μm. Since the first prism 221 and the second prism 222 have the same width W and different heights H1 and H2, they can have different tilt angles a and b. That is, the tilt angle a of the first prism 221 may be different from the tilt angle b of the second prism 222. (Refer to...) Figure 14 Light traveling from the bottom to the top is refracted horizontally as it passes through the first prism 221 and the second prism 222. At this time, due to the different tilt angles α and b of the first prism 221 and the second prism 222, the angles of refraction of the light passing through the first prism 221 and the light passing through the second prism 222 are different from each other. Therefore, the diffusion rate of light passing through the composite sheet 200 can be increased.

[0097] Figure 15 This is a perspective view showing a composite sheet according to another embodiment of the present disclosure. Figure 16 Other embodiments according to this disclosure are shown along the path. Figure 15 The cross section of the composite sheet in the E-E' direction.

[0098] Reference Figure 15 and Figure 16 Another implementation of the present disclosure is described. Figure 15 This is a perspective view according to this embodiment, omitting the side cover 270 formed around the outer peripheral surface of the composite sheet 200. (See reference...) Figure 16 The cross-section will be understood as side cover 270.

[0099] The first support layer 210 may be formed on the rear surface of the panel layer 100. The rear surface refers to the downward direction of the display panel 100, and may be a reference surface. Figure 15 In the Z-axis direction. The first support layer 210 can be attached to the rear surface of the panel layer 100 via the adhesive layer AH.

[0100] The first support layer 210 may be formed of a first material. The first material may be PET.

[0101] The light-refracting layer 220 can be formed on the rear surface of the first support layer 210. The light-refracting layer 220 can refract and diffuse light traveling along the Z-axis. The light-refracting layer 220 may include a plurality of prisms 221 arranged at regular intervals. The light-refracting layer 220 can be formed of a second material. That is, the plurality of prisms 221 can be formed of a second material. The second material can be glass or plastic, and can be a transparent material. The first material and the second material can be the same material or different materials.

[0102] The second support layer 230 may be formed on the rear surface of the light-refracting layer 220. The second support layer 230 may be formed of a first material that is the same material as the first support layer 210. The second support layer 230 may be formed of PET material.

[0103] The second light-refracting layer 240 can be formed on the rear surface of the second support layer 230. The second light-refracting layer 240 may include a plurality of prisms 221 arranged at regular intervals. The second light-refracting layer 240 can refract and diffuse light traveling along the Z-axis. The second light-refracting layer 240 can be formed of a second material. That is, the plurality of prisms 221 can be formed of a second material.

[0104] The third support layer 250 may be formed on the rear surface of the second light-refracting layer 240. The third support layer 250 may be formed of a first material that is the same as the first support layer 210 and the second support layer 230. The third support layer 250 may be formed of PET material.

[0105] like Figure 15 As shown, the light refraction layer 220 may include a plurality of prisms 221 extending along the Y-axis direction, which is a first direction. The second light refraction layer 240 may also include a plurality of prisms 221 extending along the Y-axis direction, which is also the first direction. That is, the plurality of prisms 221 disposed on the light refraction layer 220 may be formed to extend along the same direction as the plurality of prisms 221 disposed on the second light refraction layer 240.

[0106] Reference Figure 16 The composite sheet 200 may include an inclined portion S and a planar portion p. A side cover 270 may be formed on the inclined portion S. The inclined portion S may be formed along the outer peripheral surface of the composite sheet 200. The inclined portion S may be formed in a closed-loop shape. The planar portion P may be a portion other than the inclined portion S of the composite sheet 200, and may be a planar portion extending horizontally relative to the XY plane. The inclined portion S of the composite sheet 200 may have an inverted conical shape in the Z-axis direction. That is, the width of the upper surface of the composite sheet 200 (the surface in contact with the panel layer 100) may be longer than the width of the lower surface. The side cover 270 may close all spaces H exposed to the outside along the periphery of the composite sheet 200.

[0107] Return to reference Figure 15 The side cover 270 may have circular shapes R1, R2, R3, and R4 at the corners of the composite sheet 200. Because the side cover 270 has circular shapes R1, R2, R3, and R4, damage to the panel layer 100 that may occur during laser beam cutting can be reduced or prevented. Furthermore, the side cover 270 with circular shapes R1, R2, R3, and R4 can prevent surface irregularities that may occur during laser beam cutting.

[0108] According to this disclosure, the side cover 270 may include a material formed by melting at least one of the first support layer 210, the light refraction layer 220, the second support layer 230, the second light refraction layer 240 and the third support layer 250 to extend to the inclined portion S. Figure 16 This is an exemplary view in which the side cover 270 is shown to include a first extended material 210S formed by melting and extending a first support layer 210, a third extended material 230S formed by melting and extending a second support layer 230, a fourth extended material 240S formed by melting and extending a second light-refracting layer 240, and a fifth extended material 250S formed by melting and extending a third support layer 250. However, as referenced above... Figures 8 to 10 As described, the side cover 270 can have a cross-section with different shapes depending on the cutting position and the position of the cutting line of the laser beam.

[0109] Figure 17 This is a perspective view showing a composite sheet according to another embodiment of the present disclosure. Figure 18 It shows along Figure 17 The cross section of the composite sheet in the F-F' direction.

[0110] Reference Figure 17 and Figure 18 Another implementation of the present disclosure is described. Figure 17 This is a perspective view according to this embodiment, omitting the side cover 270 formed around the outer peripheral surface of the composite sheet 200. (See reference...) Figure 18 The cross-section will be understood as side cover 270.

[0111] The first support layer 210 may be formed on the rear surface of the panel layer 100. The rear surface refers to the downward direction of the display panel 100, and may be a reference surface. Figure 17 In the Z-axis direction. The first support layer 210 can be attached to the rear surface of the panel layer 100 via the adhesive layer AH.

[0112] The first support layer 210 may be formed of a first material. The first material may be PET.

[0113] The light-refracting layer 220 can be formed on the rear surface of the first support layer 210. The light-refracting layer 220 can refract and diffuse light traveling along the Z-axis. The light-refracting layer 220 may include a plurality of prisms 221 arranged at regular intervals. The light-refracting layer 220 can be formed of a second material. That is, the plurality of prisms 221 can be formed of a second material. The second material can be glass or plastic, and can be a transparent material. The first material and the second material can be the same material or different materials.

[0114] The second support layer 230 may be formed on the rear surface of the light-refracting layer 220. The second support layer 230 may be formed of a first material that is the same material as the first support layer 210. The second support layer 230 may be formed of PET material.

[0115] The second light-refracting layer 240 can be formed on the rear surface of the second support layer 230. The second light-refracting layer 240 may include a plurality of prisms 221 arranged at regular intervals. The second light-refracting layer 240 can refract and diffuse light traveling along the Z-axis. The second light-refracting layer 240 can be formed of a second material. That is, the plurality of prisms 221 can be formed of a second material.

[0116] The third support layer 250 may be formed on the rear surface of the second light-refracting layer 240. The third support layer 250 may be formed of a first material that is the same as the first support layer 210 and the second support layer 230. The third support layer 250 may be formed of PET material.

[0117] like Figure 17 As shown, the light refraction layer 220 may include a plurality of prisms 221 extending along the X-axis direction, which is a first direction. The second light refraction layer 240 may include a plurality of prisms 221 extending along the Y-axis direction, which is a second direction. That is, the plurality of prisms 221 disposed on the light refraction layer 220 may be formed to extend along a different direction than the plurality of prisms 221 disposed on the second light refraction layer 240.

[0118] Reference Figure 18 The composite sheet 200 may include an inclined portion S and a planar portion P. A side cover 270 may be formed on the inclined portion S. The inclined portion S may be formed along the outer peripheral surface of the composite sheet 200. The inclined portion S may be formed in a closed-loop shape. The planar portion P may be a portion other than the inclined portion S of the composite sheet 200, and may be a planar portion extending horizontally relative to the XY plane. The inclined portion S of the composite sheet 200 may have an inverted conical shape in the Z-axis direction. That is, the width of the upper surface of the composite sheet 200 (the surface in contact with the panel layer 100) may be longer than the width of the lower surface. The side cover 270 may close all spaces H exposed to the outside along the periphery of the composite sheet 200.

[0119] Return to reference Figure 17 The side cover 270 may have circular shapes R1, R2, R3, and R4 at the corners of the composite sheet 200. Because the side cover 270 has circular shapes R1, R2, R3, and R4, damage to the panel layer 100 that may occur during laser beam cutting can be reduced or prevented. Furthermore, the side cover 270 with circular shapes R1, R2, R3, and R4 can prevent surface irregularities that may occur during laser beam cutting.

[0120] According to this disclosure, the side cover 270 may include a material formed by melting at least one of the first support layer 210, the light refraction layer 220, the second support layer 230, the second light refraction layer 240 and the third support layer 250 to extend to the inclined portion S. Figure 18 This is an exemplary view in which the side cover 270 is shown to include a first extended material 210S formed by melting and extending a first support layer 210, a second extended material 220S formed by melting and extending a light-refracting layer 220, a third extended material 230S formed by melting and extending a second support layer 230, a fourth extended material 240S formed by melting and extending a second light-refracting layer 240, and a fifth extended material 250S formed by melting and extending a third support layer 250. However, as referenced above... Figures 8 to 10 As described, the side cover 270 can have a cross-section with different shapes depending on the cutting position and the position of the cutting line of the laser beam.

[0121] In addition, this disclosure also includes the following implementation methods.

[0122] Implementation Method 1. A method for producing composite sheets, comprising:

[0123] Form the first support layer;

[0124] A light-refractive layer is formed on the first support layer, the light-refractive layer comprising a plurality of light-refractive elements;

[0125] A second support layer is formed on the light-refracting layer, wherein the first support layer, the light-refracting layer, and the second support layer together form a composite sheet;

[0126] Attach the composite sheet to the rear surface of the panel layer; and

[0127] The composite sheet is obliquely cut by irradiating it with a laser beam that penetrates the second support layer, the light-refracting layer, and the first support layer, the laser beam covering the opening at the edge of the light-refracting layer.

[0128] Implementation Method 2. The method for producing a composite sheet according to Implementation Method 1, wherein cutting includes forming a side cover by melting at least one of the second support layer, the light-refracting layer and the first support layer.

[0129] Embodiment 3. The method for producing a composite sheet according to Embodiment 2, wherein the side cover is formed around the periphery of the composite sheet.

[0130] Embodiment 4. The method for producing a composite sheet according to Embodiment 2, wherein forming the side cover includes forming rounded corners of the composite sheet.

[0131] Implementation method 5. A display panel, comprising:

[0132] Panel layer;

[0133] A composite sheet on the rear surface of the panel layer, the composite sheet comprising a planar portion and an inclined portion; and

[0134] The outer casing, wherein the panel layer and the composite sheet are disposed within the outer casing.

[0135] The composite sheet includes:

[0136] A first support layer on the rear surface of the panel layer, the first support layer comprising a first material;

[0137] A light-refracting layer on the rear surface of the first support layer, the light-refracting layer comprising a second material;

[0138] A second support layer on the rear surface of the light-refracting layer, the second support layer comprising the first material; and

[0139] A side cover on the inclined portion of the composite sheet, the side cover covering the opening at the edge of the light-refracting layer.

[0140] Embodiment 6. The display panel according to Embodiment 5, wherein the side cover includes at least one of a first extending material extending from a first material of the first support layer, a second extending material extending from a second material of the light refraction layer, and a third extending material extending from the first material of the second support layer.

[0141] Embodiment 7. The display panel according to Embodiment 6, wherein the third extending material passes through a virtual line extending from the light refraction layer to the inclined portion and a virtual line extending from the first support layer to the inclined portion.

[0142] Embodiment 8. The display panel according to Embodiment 6, wherein the third extending material passes through the virtual line extending from the light refraction layer to the inclined portion and the virtual line extending from the first support layer to the inclined portion, and the second extending material passes through the virtual line extending from the first support layer to the inclined portion, but does not pass through the virtual line extending from the light refraction layer to the inclined portion.

[0143] Embodiment 9. The display panel according to Embodiment 6, wherein the third extending material passes through a virtual line extending from the light refraction layer to the inclined portion, and the second extending material passes through a virtual line extending from the first support layer to the inclined portion.

[0144] Embodiment 10. The display panel according to Embodiment 5, wherein the side cover is disposed around the periphery of the composite sheet.

[0145] Embodiment 11. The display panel according to Embodiment 5, wherein the side cover includes at least one rounded corner.

[0146] Implementation 12. The display panel according to Implementation 5, wherein the light refraction layer includes a plurality of prisms.

[0147] Embodiment 13. The display panel according to Embodiment 12, wherein the plurality of prisms includes a first prism having a first height and a first width, and a second prism having a second height and the first width, wherein the second height is different from the first height.

[0148] Embodiment 14. The display panel according to Embodiment 5 further includes:

[0149] A second light-refracting layer on the second support layer, the second light-refracting layer comprising the second material; and

[0150] A third support layer on the second light-refracting layer, the third support layer comprising the first material.

[0151] Embodiment 15. The display panel according to Embodiment 14, wherein the side cover includes at least one of a first extending material extending from a first material of the first support layer, a second extending material extending from a second material of the light refraction layer, a third extending material extending from the first material of the second support layer, a fourth extending material extending from the second material of the second light refraction layer, and a fifth extending material extending from the first material of the third support layer.

[0152] Embodiment 16. The display panel according to Embodiment 14, wherein the light refraction layer includes a first plurality of prisms extending along a first direction, and the second light refraction layer includes a second plurality of prisms extending along the first direction.

[0153] Embodiment 17. The display panel according to Embodiment 14, wherein the light refraction layer includes a first plurality of prisms extending along a first direction, and the second light refraction layer includes a second plurality of prisms extending along a second direction different from the first direction.

[0154] Embodiment 18. The display panel according to Embodiment 17, wherein the first direction and the second direction form an angle between 0 degrees and 90 degrees.

[0155] Embodiment 19. The display panel according to Embodiment 5, wherein the composite sheet has an inverted conical shape.

[0156] Embodiment 20. The display panel according to Embodiment 5, wherein the housing includes at least one of a bottom cover, a guide panel, and a top cover, wherein the lower surface of the composite sheet does not contact the housing.

[0157] Implementation Method 21. A composite sheet, comprising:

[0158] A first support layer, comprising a first material;

[0159] A light-refracting layer on the first support layer, the light-refracting layer comprising a plurality of light-refracting elements of a second material, the second material being different from the first material;

[0160] A second support layer on the light-refracting layer, the second support layer comprising the first material; and

[0161] A side cover is disposed at a certain angle on the first support layer, the light refraction layer and the second support layer, the side cover covering the opening at the edge of the light refraction layer due to the shape of the plurality of light refraction elements.

[0162] Embodiment 22. The composite sheet according to Embodiment 21, wherein the side cover includes at least one of a first extension material extending from a first material of the first support layer, a second extension material extending from a second material of the light refraction layer, and a third extension material extending from the first material of the second support layer.

[0163] Embodiment 23. The composite sheet according to Embodiment 21, wherein the plurality of light refraction elements include a plurality of prisms.

[0164] Embodiment 24. The composite sheet according to Embodiment 23, wherein the plurality of prisms includes a first prism having a first height and a first width, and a second prism having a second height and the first width, the second height being different from the first height.

[0165] Implementation Method 25. The composite sheet according to Implementation Method 21, wherein the angle of the side cover is greater than 0 degrees and less than 90 degrees.

[0166] Although embodiments of the invention have been described with reference to the accompanying drawings, those skilled in the art will understand that the technical configuration of the invention can be implemented in other detailed forms without altering the technical spirit or essential characteristics of the invention. Therefore, it should be noted that the above embodiments are provided as examples and should not be construed as limiting. Furthermore, the scope of the invention should be defined by the appended claims rather than the detailed description provided above. Moreover, the meaning and scope of the claims, as well as all changes or modifications derived from their equivalents, should be interpreted as falling within the scope of the invention.

Claims

1. A display panel, comprising: Panel layer; A composite sheet on the rear surface of the panel layer, the composite sheet comprising a planar portion and an inclined portion; as well as The outer casing, wherein the panel layer and the composite sheet are disposed within the outer casing. The composite sheet includes: A first support layer, comprising a first material; A first light-refractive layer on the first support layer, wherein the first light-refractive layer comprises a second material; A second support layer on the first light-refractive layer, the second support layer comprising a third material formed of the same material as the first material; and The side cover on the inclined portion of the composite sheet, The side cover includes a first extension material extending from the first material and a second extension material extending from the third material, and The second extension material covers the side surface of the first light-refracting layer and the side surface of the second support layer.

2. The display panel according to claim 1, wherein, The first extension material covers the side surface of the first support layer.

3. The display panel according to claim 2, wherein, The composite sheet also includes: A second light-refracting layer on the second support layer, the second light-refracting layer comprising a fourth material formed of the same material as the second material; and A third support layer on the second light-refracting layer, the third support layer comprising a fifth material formed of the same material as the first material.

4. The display panel according to claim 3, wherein, The side cover also includes a third extension material extending from the fourth material and a fourth extension material extending from the fifth material. The third extension material covers the side surface of the second light-refracting layer, and The fourth extension material covers the side surface of the third support layer.

5. The display panel according to claim 4, wherein, One end of the third extension material is covered by the fourth extension material and the second extension material.

6. A display panel, comprising: Panel layer; A composite sheet on the rear surface of the panel layer, the composite sheet comprising a planar portion and an inclined portion; as well as The outer casing, wherein the panel layer and the composite sheet are disposed within the outer casing. The composite sheet includes: A first support layer, comprising a first material; A first light-refractive layer on the first support layer, wherein the first light-refractive layer comprises a second material; A second support layer on the first light-refractive layer, the second support layer comprising a third material formed of the same material as the first material; and The side cover on the inclined portion of the composite sheet, The side cover includes a first extension material extending from the first material, a second extension material extending from the second material, and a third extension material extending from the third material. The first extension material covers the side surface of the first support layer. Wherein, the second extended material covers the side surface of the first light-refracting layer, and The third extension material covers the side surface of the second support layer.

7. The display panel according to claim 6, wherein, One end of the second extension material is covered by the first extension material and the third extension material.

8. The display panel according to claim 6, wherein, The composite sheet also includes: A second light-refracting layer on the second support layer, the second light-refracting layer comprising a fourth material formed of the same material as the second material; and A third support layer on the second light-refracting layer, the third support layer comprising a fifth material formed of the same material as the first material.

9. The display panel according to claim 8, wherein, The side cover also includes a fourth extension material extending from the fourth material and a fifth extension material extending from the fifth material. The fourth extension material covers the side surface of the second light-refracting layer, and The fifth extension material covers the side surface of the third support layer.

10. The display panel according to claim 9, wherein, One end of the fourth extension material is covered by the third extension material and the fifth extension material.

11. The display panel according to claim 1 or claim 6, wherein, The first light-refracting layer includes multiple prisms.

12. The display panel according to claim 11, wherein, The plurality of prisms includes a first prism and a second prism, the first prism having a first height and a first width, and the second prism having a second height and the first width, wherein the second height is different from the first height.

Images