Rollable backsheet for light-emitting device and light-emitting device using same

Abstract

The present invention relates to a rollable backsheet for a light-emitting device and a light-emitting device using the same. [Solution] More specifically, the present invention relates to a rollable backsheet for a light-emitting device which comprises a base film and a light-guiding pattern formed on the base film, and which has a line printing section for adhering the base film to a release paper, and which prevents air from flowing between the manufactured base film and the release paper, thereby preventing the gap between the release paper and the base film from widening even when the base film is produced, distributed, stored, and used in roll form, enabling long-term storage. However, when the base film is unrolled from the roll for use, its unique multi-layer structure allows it to be unrolled easily and smoothly, making it easy to cut and wear, and to a light-emitting device using the same.

Description

[Technical field]

[0001] The present invention relates to a rollable backsheet for a light-emitting device and a light-emitting device using the same, and more specifically, to a rollable backsheet for a light-emitting device which comprises a base film and a light-guiding pattern formed on the base film, and which is formed with a line printing section for adhering the base film to a release paper, and which prevents air from flowing between the manufactured base film and the release paper, thereby preventing the gap between the release paper and the base film from widening even when the base film is produced, distributed, stored, and used in rolled form, enabling long-term storage, while when the base film is unrolled from the roll for use, it can be easily and smoothly unrolled due to its unique multi-layer structure, making it easy to cut and wear, and to a light-emitting device using the same. [Background technology]

[0002] The backsheet of a display device is generally formed by laminating various kinds of laminated or composite films, such as a reflective film, a light-guiding film, a diffusion film, a prism sheet, and the like.

[0003] In this case, the light guiding film or light guiding panel is a component that provides a path for uniformly scattering and diffusing light irradiated from a light source, and is applied to non-emissive flat panel display devices such as liquid crystal display elements, or surface light source devices used in illuminated signs, etc.

[0004] Prior art in this regard includes Korean Utility Model No. 20-0270488, "Pattern sheet for manufacturing LCD backlight light guide plate." The above-mentioned conventional technology involves adhering a dry film onto a sus sheet, placing a pattern film on the dry film, exposing it to light, developing and etching the exposed sus sheet, and then removing the film to obtain a pattern sheet engraved with a pattern. The pattern sheet is then attached to a mold and resin is injected and molded to manufacture an acrylic light guide panel, which allows for repeated production, improves productivity, reduces costs, and has the advantage of showing excellent reproducibility.

[0005] In addition, Korean Patent Publication No. 10-2012-0017340 entitled "Diffusion sheet and light guide plate having irregular pattern, backlight unit including the same, and manufacturing method thereof" includes a transparent synthetic resin sheet body and an irregular pattern formed of a plurality of discontinuous linear grooves arranged in parallel on at least one surface of the body to diffuse or focus light. This has the characteristic of significantly reducing defects caused by scratches and foreign matter that may occur during the manufacturing process compared to conventional methods, and improving light diffusion and brightness.

[0006] Another prior art is the Korean Utility Model No. 20-0453058 entitled "Reflective sheet with light guide pattern" The above technique provides a technique that can reduce the manufacturing cost of a backlight unit and improve the brightness and illuminance uniformity by forming a pattern on a reflective sheet to guide light generated from a light source.

[0007] As described above, various technologies related to light guide sheets or light guide plates that aim to improve luminance, brightness, illuminance, etc. have been presented. However, when considering the conventional technologies, when removing and attaching the light guide sheet (back sheet), the pattern of the back sheet attached to the light-transmitting panel sticks to the light guide sheet, requiring high skill on the part of the worker, which causes major dissatisfaction among users and therefore requires continuous improvement.

[0008] In addition, when manufacturing such a back sheet, if a release paper is used to protect the light guiding pattern of a sheet on which the light guiding pattern is printed, the release paper is rolled up and stored, and then fed to a sheet feeder to minimize space and improve work efficiency. However, when the back sheet with the release paper for protecting the pattern is rolled up, the edge of the back sheet often lifts up due to bending. Air flows into the lifted space, causing the adhesive liquid to harden or dry, which reduces the adhesive strength during actual use, and this often causes a problem of increasing the defective rate of the product. Summary of the Invention [Problem to be solved by the invention]

[0009] Therefore, the present invention has been made to solve such problems, To provide a rollable back sheet for a light emitting device, which comprises a base film and a light guide pattern repeatedly formed on the base film, and which has a line printed section formed on the base film to allow the base film to adhere closely to a release paper, thereby preventing air from flowing in between the base film and the release paper.

[0010] Specifically, the objective is to provide a rollable backsheet for light-emitting devices that can be stored for long periods by preventing air from flowing between the base film and the release paper, thereby preventing gaps from widening even when the sheet is produced, distributed, stored, and used in roll form.

[0011] In particular, the line printing portion is formed using ink mixed with an adhesive, like the light guiding pattern, but is printed in such a way that the light guiding pattern is not formed, thereby further improving adhesive strength and providing an object to provide a rollable backsheet for a light emitting device that can enhance manufacturing convenience.

[0012] Another object of the present invention is to provide a rollable back sheet for a light emitting device, which is configured such that the base film has a multi-layer structure and can be easily and smoothly unrolled during unrolling.

[0013] Another object of the present invention is to provide a light emitting device using the rollable backsheet for a light emitting device. [Means for solving the problem]

[0014] In order to achieve the above object, the rollable back sheet for a light emitting device according to the present invention comprises: A base film; a light-guiding pattern having adhesiveness, which is printed with a light-emitting ink mixed with an adhesive so as to be repeatedly formed on the base film; A line printed portion formed on the base film and adhering the base film to a release paper, A light emitting device using the rollable backsheet for a light emitting device is A frame, a light-transmitting panel provided on the frame and having a patterned portion and a back sheet having a light-guiding pattern formed on one surface; a light-emitting unit provided on the frame and configured to irradiate light onto a side surface of the translucent panel, the light-emitting unit including a PCB and a light-emitting member; and a cover that is detachably attached to the frame. Effect of the Invention

[0015] As described above, the rollable backsheet for a light-emitting device according to the present invention and the light-emitting device using the same are Light guide patterns are formed at intervals on the surface of the base film, particularly the reflective film, and these patterns are formed by printing luminescent ink mixed with an adhesive. When the adhesive backsheet is attached to a light-emitting device, particularly a display (such as a signboard or guide plate) or a light-transmitting panel that constitutes a surface lighting device, it can be attached by simply applying pressure, which is a feature that dramatically improves productivity.

[0016] In addition, when manufacturing this base film, an adhesive line printing section is further configured to prevent the lifting phenomenon between the release paper protecting the light guiding pattern and the base film, which solves the problem of air entering between the release paper and the base film, causing a decrease in adhesive strength, and thus enabling long-term storage.

[0017] In addition, the base film has a multi-layer structure, so that when the rolled base film is unrolled for use, it can be easily and smoothly unrolled, and is therefore easy to cut and wear.

[0018] Furthermore, by improving the luminescent ink mixed with an adhesive for printing the light-guiding pattern, not only can the ink maintain its adhesiveness even when repeatedly attached and detached, but the pattern of the backsheet attached to the light-transmitting panel does not stick, which can dramatically improve workability and quality.The light-guiding performance is maintained even when backsheets are attached in succession, and a groundbreaking technology can be provided that can produce not only dot-type light-guiding patterns that must be aligned with the direction of the light source irradiation part, but also lattice-type light-guiding patterns that are unrelated to the direction of the light source irradiation part.

[0019] Furthermore, since the line printing portion extends to the light guiding pattern or is formed adjacent to the edge of the light guiding pattern so that they can be printed together, it is possible to improve workability, simplify the manufacturing process, and reduce the required time. [Brief description of the drawings]

[0020] [Figure 1] FIG. 4 is a detailed view of a line printed portion of the rollable back sheet for a light emitting device according to the present invention. [Diagram 2] 1 is a dot-shaped embodiment of the rollable backsheet for a light-emitting device according to the present invention. [Diagram 3] 1 is a lattice-type embodiment of a rollable backsheet for a light-emitting device according to the present invention. [Figure 4] 1 is a perspective view and an exploded perspective view of a rollable backsheet for a light emitting device according to the present invention and a light emitting device using the same; [Diagram 5] 1 shows a joining device used for the rollable back sheet for a light emitting device according to the present invention. [Figure 6] FIG. 2 is an exploded plan view of a light emitting device according to the present invention. [Figure 7] FIG. 2 is a detailed view of the frame of the light-emitting device according to the present invention. [Figure 8] FIG. 2 is a detailed view of the cover of the light emitting device according to the present invention. [Figure 9]4 is a view showing an embodiment of the combination of a frame and a cover of the light emitting device according to the present invention; [Figure 10] 1 is a diagram illustrating an embodiment of a light-emitting unit of a light-emitting device according to the present invention; [Figure 11] 1 is a side cross-sectional view of a light emitting device according to the present invention. [Figure 12] 1 is a diagram illustrating an embodiment of a light emitting device according to the present invention; [Figure 13] 1 is a diagram illustrating an embodiment of a light emitting device according to the present invention; [Figure 14] 13 is a modified example of the light emitting device according to the present invention. [Figure 15] 13 is a modified example of the light emitting device according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] The present invention will now be described in detail with reference to the accompanying drawings.

[0022] Since the present invention can be modified in various ways and can have various forms, the aspects (or embodiments) are described in detail in the present text. However, this is not intended to limit the present invention to the specific disclosed form, and it should be understood that the present invention includes all modifications, equivalents, or alternatives within the spirit and technical scope of the present invention.

[0023] In each drawing, the same reference symbols, especially reference symbols having the same tens digit and ones digit, or the same tens digit, ones digit and alphabet, indicate components having the same or similar functions, and unless otherwise specified, the components indicated by each reference symbol in the drawings may be understood to conform to such standards.

[0024] In addition, in each drawing, the size and thickness of the components are exaggerated or simplified for ease of understanding, but this should not be construed as limiting the scope of protection of the present invention.

[0025] The terms used in this specification are used to describe a particular aspect (or embodiment) and are not intended to limit the present invention. A singular expression includes a plural expression unless otherwise specified in the context. In this application, the terms "comprise" or "comprise" are intended to specify the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and should be understood not to preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0026] Unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted to have a meaning consistent with the meaning they have in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense unless expressly defined in this application.

[0027] As shown in Figures 1 to 4, the rollable backsheet BS for a light emitting device according to the present invention mainly comprises a base film BF, a light guide pattern repeatedly formed on the base film BF, and a line printed portion 80 formed on the base film BF.

[0028] In the side-light type light-emitting device, the base film (BF) is preferably a reflective film. The reflective film is preferably configured so that it can effectively reflect the light emitted from the light source by the back sheet (BS) (the reflective performance is determined by the reflectance of the mirror reflection) and can also be used as a back surface protection film for the light-emitting device, and furthermore, a known reflective film can be adopted that has the function of reflecting the diffused light leaking from the back sheet (BS) back to the back sheet (BS) again and changing the direction of the light moving parallel through the back sheet BS to a direction perpendicular to the plate so as to deviate from the light guide sheet.

[0029] It is preferable that such a base film (BF) or reflective film has a flexible property for workability, and in order to increase smoothness and facilitate cutting and attachment when unrolling the roll-shaped base film (BF), it is preferable that the base film is composed of a first layer made of a polypropylene (PP) material, a second layer made of a polyethylene terephthalate (PET) material provided on one side of the first layer, and a third layer made of the same PP material as the first layer and provided on one side of the second layer.

[0030] The first to third layers can be laminated and formed using methods such as pressure bonding and adhesion, but other methods can also be used. Therefore, the scope of the rights should not be interpreted in a restrictive manner.

[0031] The light-guiding pattern 70 formed on the base film (BF) is formed by a printing method using luminescent ink mixed with an adhesive. The adhesive makes the pattern-forming surface of the base film (BF) sticky, so that when it is attached to a light-transmitting panel to manufacture a light-emitting device, the back sheet BS is laminated on the light-transmitting panel, and the panel is rotated by a motor and passed through a joining device P2 having a pressing drum P1 arranged on a table P2, allowing easy attachment (see FIG. 5).

[0032] The luminescent component of the luminescent ink composition for the light guide pattern 70 can be that of a general light guide sheet, for example, ceramic particles such as titanium oxide or glass.

[0033] Also, the adhesive may be made of acrylic or silicone having the adhesive component, or any of other urethane-based, polysynthetic resin, urethane vinyl-based synthetic resin, etc. may be selected and used. It has a property of being printed in a liquid or paste form and being hardened in a gel form, and preferably has repeated adhesiveness like the well-known Post-it. It is preferable that the adhesive has natural hardening or UV hardening properties to ensure the stability of the bond between the back sheet BS and the light-transmitting panel.

[0034] Also, it is preferable that the back sheet BS can be produced and sold separately by attaching a release paper to the surface on which the light guide pattern 70 is formed.

[0035] In addition, the method of printing a pattern with luminescent ink on the base film BF, especially the reflective film, can utilize a roll-type printing technique, as presented in Korean Utility Model Registration No. 20-0451991 (Registration date: January 18, 2011) [Apparatus for manufacturing reflective sheet with light-guiding pattern].

[0036] The present invention is characterized in that, when the back sheet BS is manufactured and stored in a roll form as described above, a line printed section 80 is further provided so that the back sheet BS can be stored for a long period of time while maintaining its adhesiveness. Each configuration will be described in more detail below with reference to Figs. 1 to 4.

[0037] Before describing the line printing unit 80, the light guide pattern 70 is formed on one surface of the base film BF, and a plurality of patterns are repeatedly formed. When the portion where the pattern 70 is formed is defined as a pattern forming unit, the line printing unit 80 is formed to extend to the edge of the pattern forming unit or to be adjacent to the edge of the pattern forming unit, and more precisely, is characterized in that it is provided in at least one of the pattern forming units. More preferably, the back sheet BS is wound in a roll shape and is provided on both sides of the longitudinal direction of the back sheet BS.

[0038] The line printing portion 80 has adhesive properties and may be formed using a separate adhesive tape having adhesive properties like Post-it notes. However, in consideration of ease of manufacture, it is preferable that the line printing portion 80 is formed by printing ink mixed with adhesive, similar to the light guiding pattern 70.

[0039] At this time, it is preferable that the line printing portion 80 is formed with a higher (stronger) adhesive strength than the light-guiding pattern 70, and the release paper AF attached to the base film BF is completely adhered to the base film BF, thereby completely preventing the lifting phenomenon from occurring.

[0040] In addition, the line printed portion 80 is formed at a distance inward from the edge of the base film BF, and when the release paper is attached, it is preferable that the release paper is attached from the line printed portion 80 without being attached to the edge, thereby improving adhesion.

[0041] The light guiding pattern 70 will be described in more detail with reference to FIGS. 2 and 3. The light guiding pattern 70 may be a dot pattern D1, D2, D3, D4 or a lattice pattern L1, L2, and is preferably configured such that the density increases as it is farther away from the light emitting member, so that the light from the light source exhibits uniform brightness throughout the light emitting device.

[0042] The first dot type D1 of the dot pattern of the light-guiding pattern 70 is a dot type pattern having the same density per unit area of ​​the base film BF, and is composed of a number of similar circular (rectangles with rounded corners) or circular shapes arranged adjacent to each other.

[0043] The second dot type D2 is similar to the first dot type D1 and is configured in a similar circular or circular shape, but has a smaller diameter than the first dot type D1 and can be configured to have a different density per unit area.

[0044] More specifically, the second dot type D2 gradually increases the number of pattern elements per unit area, and the third and fourth dot types D3 and D4 gradually increase the individual size of each pattern element. The second and fourth dot types D2 and D4 have a low density portion Dl at one end (the light emitting member side) and a high density portion Dh at the other end. The third dot type D3 has low density portions D1 located at both ends (light emitting members are provided at both ends) and a high density portion Dh located in the center.

[0045] 3, the lattice-type light guide patterns L1 and L2 are each composed of a plurality of pattern elements densely packed within a rectangular pattern outline 70L. Moreover, each pattern element of the two lattice-type light guide patterns L1 and L2 has a triangle or a similar triangle (with rounded corners).

[0046] The first lattice-type light-guiding pattern L1 has pattern elements in which the corners 73a and the sides 73b are separated from each other, and it is preferable that the corners 73a are located at each corner of a rectangular pattern contour 70L, and that one of the vertices of a triangle corresponds to the vertex of the corner 73a.

[0047] In addition, the first lattice light guide pattern L1 has two pattern elements gathering to form one side 73b, and the side 73b is configured in a diamond shape with the bases of the pattern elements gathering in parallel so as not to come into contact with each other. A plurality of diamond-shaped side portions 73b are provided within the rectangular pattern outline 70L. The side portion 73b may be configured in a square shape according to the length of the side of each pattern element.

[0048] Four side portions 73b are provided within the rectangular pattern outline 70L, and each side portion 73b is configured to have the same shape in the 12 o'clock and 6 o'clock directions (vertical direction) and the 3 o'clock and 9 o'clock directions (horizontal direction) based on the clockwise direction.

[0049] That is, the two side portions 73b arranged in the horizontal direction have the same shape, and the two side portions 73b arranged in the vertical direction also have the same shape, but the shape in the horizontal direction and the shape in the vertical direction are formed to be different from each other.

[0050] Unlike the first lattice-type light guide pattern L1, the second lattice-type light guide pattern L2 has a form in which, in one pattern element, a part of the pattern element covers a corner portion 73a and the remaining part of the pattern element covers a side portion 73b.

[0051] The inventor conducted experiments using a device incorporating a backsheet BS having such lattice-type light guiding patterns L1 and L2, and found that the lattice-type light guiding patterns L1 and L2 exhibited uniform brightness and high quality characteristics throughout the light emitting device, even if the light source was provided on only one side and even if the density of the pattern elements was uniform overall without increasing or decreasing.

[0052] Furthermore, it has been found that the backsheet BS having such a rectangular pattern contour 70L, when arranged in an inclined form with respect to the light source, provides excellent luminance quality.

[0053] That is, the angle θ between the positions of the light emitting members and the lattice-type light guide patterns L1, L2 is preferably 20 to 80 degrees, and more preferably 30 to 70 degrees.

[0054] Furthermore, even when the backsheets BS are arranged in succession, the light guiding performance is maintained as it is, and as shown in the photograph in which the joints can be seen for the first and second dot-type light guiding patterns D1 and D2, this is the same not only for the light emitting device using the backsheet BS having this, but also for the lattice-type light guiding patterns L1 and L2. However, it is preferable that the lattice-type light guiding patterns L1 and L2 are matched with each other at the joints.

[0055] 4, 6 to 13 are diagrams related to a light-emitting device using the rollable backsheet BS for a light-emitting device according to the present invention. The light-emitting device is characterized by including a frame, a light-transmitting panel provided on the frame and having the backsheet BS of claim 1 on which a pattern portion is formed and on one surface of which a light-guiding pattern 70 is formed, a light-emitting unit provided on the frame and made of a PCB and a light-emitting member so as to irradiate light to a side surface of the light-transmitting panel, and a cover detachably provided on the frame.

[0056] Each of the configurations will be described in more detail with reference to the drawings. The frame 10 is a rectangular frame with an opening in the center. Although the four frame segments 11 can be manufactured integrally, it is preferable to manufacture them separately and then assemble them together to form a single rectangular frame 10, as shown in Figures 4 and 6, in order to improve ease of assembly and production.

[0057] The four frame segments 11 are all of the same shape (although their lengths may differ depending on the position where they are provided, i.e., horizontally and vertically), and for ease of explanation, the side where the cover 40 is provided is referred to as the rear side, and the opposite side is referred to as the front side.

[0058] Again, since the front surface of the frame 10 is flat, after assembly is completed, the edges of the light-transmitting panel 20 are cleaned to provide a beautiful appearance.

[0059] As shown in FIG. 7, the frame 10 is formed with a bracket accommodating portion 12 in which a fixed bracket 13, which will be described later, is pulled in, and a detachment prevention portion 121 is provided on the rear surface of the bracket accommodating portion 12 to narrow the width of the bracket accommodating portion 12 and prevent the fixed bracket 13 from detaching.

[0060] Again, the fixing brackets 13 are provided at each corner to interconnect the four frame segments 11, and for this purpose, the ends of each frame segment 11 are formed in a diagonal shape as shown in Figures 6 and 7, and the fixing brackets 13 are made of a rigid material member that forms a right angle to fix two adjacent frame segments 11 together, maintain the square frame, and improve durability.

[0061] The fixing bracket 13 is a member that is inserted into the bracket receiving portion 12 from the side. During assembly, the user attaches the four fixing brackets 13 to the four frame segments 11 at each corner, and then assembles the frame segments 11 by applying force so that they are adjacent to each other. This makes it structurally impossible for any one of the frame segments 11 to be arbitrarily separated, ensuring the stability of the assembly.

[0062] In addition, a headless bolt 131 (a regular bolt can also be used) is fastened to the fixing bracket 13 and is tightly attached to the bottom surface of the bracket receiving portion 12, thereby firmly fixing the fixing bracket 13 and maintaining a more stable connection.

[0063] In other words, the headless bolt 131 penetrates the fixed bracket 13 and comes into close contact with the bottom surface of the bracket accommodating portion 12, and when the headless bolt 131 is tightened, the anti-detachment portion 121 supporting the rear surface of the fixed bracket 13 prevents the fixed bracket 13 from moving backward, and the headless bolt 131 is pressed against the bottom surface of the bracket accommodating portion 12, thereby firmly fixing the fixed bracket 13 to the frame section 11.

[0064] On the inside of the bracket accommodating portion 12 (meaning the direction in which the translucent panel 20 is provided), a fixing portion 14 to which the light-emitting unit 30 can be fixed is provided in a shape similar to an outer wall, and more precisely, the fixing portion 14 is formed by a wall that forms the bracket accommodating portion 12 and a wall that is formed by the second connection portion 19 described later.

[0065] Further, inside the fixing portion 14, more precisely, on the innermost side of the frame divided body 11, a horizontally flat panel mounting portion 16 is formed, and the edge portion of the translucent panel 20 is mounted to this panel mounting portion 16 for assembly.

[0066] In this case, for more secure fixation, the panel mounting portion 16 may be further provided with an adhesive member such as double-sided tape, and therefore the scope of rights should not be interpreted in a restrictive manner.

[0067] It is obvious that the light-transmitting panel 20 is formed with a pattern such as a word, a design, or the like to be illuminated. Furthermore, the present invention provides a special functional coating treatment on the outer surface of the light-transmitting panel 20 to improve scratch resistance, dirt resistance, fire resistance, etc.

[0068] In addition, the light-transmitting panel 20 further includes a back sheet BS, which is a back sheet BS having a light-guiding pattern 70 formed thereon, as described above, and a detailed description thereof will be omitted as it is the same as described above.

[0069] Again, when the edge portion of the light-transmitting panel 20 is mounted on the panel mounting portion 16, the fixing portion 14 made of a wall is positioned on the side of the light-transmitting panel 20, and the light-emitting unit 30 is fixed to the fixing portion 14 so that the light can be irradiated to the side of the light-transmitting panel 20 (this means a side light irradiation method). The light emitting unit 30 includes a light emitting member 31 made of an LED for improving light emitting efficiency, and a PCB 33 provided on the light emitting member 31. Generally, the width of the PCB 33 or the width between the PCB 33 and the light emitting member 31 differs between white LEDs and RGB LEDs due to the difference in the light emitting method. The width of the PCB 33 of an actual white LED is 5 mm, and the width of the PCB 33 of an RGB LED is 8 mm. Conventionally, there was a problem in that the frame 10 had to be manufactured separately so that the width of the fixing part 14 could be changed depending on the type of LED.

[0070] Therefore, the present invention is configured such that the fixing portion 14 is further provided with a width expansion portion 15 so that both the white LED and the RGB LED can be used.

[0071] More specifically, as shown in FIG. 10, the width expansion portion 15 is a groove formed near the fixing portion 14 and is formed at a position lower than the panel mounting portion 16 to which the translucent panel 20 is mounted. When a white LED is used as in FIG. 10[A], a part of the PCB 33 is fixed so that it is not drawn into the width expansion portion 15 so that the light emitting member 31 is positioned on the side of the translucent panel 20. When an RGB LED is used as in FIG. 10[B], a part of the PCB 33 is fixed so that it is drawn into the width expansion portion 15, so that the light emitting member 31 (LED CHIP) can be positioned on the side of the translucent panel 20 like a white LED, thereby improving the light emitting efficiency.

[0072] In addition, as shown in FIGS. 4 and 11, a light-leakage prevention member 21 is further provided on the side of the translucent panel 20 to prevent the light irradiated from the light-emitting unit 30 from leaking to the opposite side after being irradiated to the side of the translucent panel 20, thereby improving the light-emitting efficiency.

[0073] That is, the light leakage prevention member 21 is located on the side opposite to the direction in which light is irradiated by the light emitting unit 30, and is attached to the side of the light-transmitting panel 20 using a separate adhesive member such as double-sided tape. The light leakage prevention member 21 is preferably made of a material such as a dark film sheet that can block light.

[0074] In addition, the light leakage prevention member 21 may be provided on all sides other than the side on which light is irradiated by the light emitting unit 30, and therefore the scope of the right should not be interpreted in a restrictive manner.

[0075] As described above, when the light emitting unit 30 is provided, a cable 331 for supplying power to the light emitting unit 30 is necessarily provided, and it is obvious that the frame 10 has a separate through hole through which the cable 331 passes. Although this is not shown in the drawings, it can be easily inferred by a person skilled in the art, so detailed description will be omitted.

[0076] When the light-emitting unit 30 and the light-transmitting panel 20 are provided on the frame 10 as described above, a cover 40 is further provided to prevent the light-emitting unit 30 and the light-transmitting panel 20 from coming off. The cover 40 is made up of four cover segments 41 corresponding to each frame segment 11, and the cover 40 is removably connected to the frame 10 with one touch, improving the convenience of assembly, and is also configured to be easily separated for maintenance.

[0077] To this end, first, a first coupling portion 18 and a second coupling portion 19 are formed on the frame 10 as shown in FIG. 7, and the cover 40 is provided with a first corresponding coupling portion 48 and a second corresponding coupling portion 49 which are respectively coupled to the first coupling portion 18 and the second coupling portion 19 as shown in FIG. 8, and the cover 40 is configured so as to be detachably coupled to the frame 10 with a single touch as shown in FIG. 9.

[0078] To explain each component in more detail, first, as shown in FIG. 7, the frame 10 has a first coupling portion 18 formed on the outside and a second coupling portion 19 formed on the inside spaced apart from the first coupling portion 18, and one side of the second coupling portion 19 is configured to form a fixing portion 14 to which the light-emitting unit 30 is fixed.

[0079] Again, the first coupling part 18 is a protrusion protruding from the rear end of the frame 10 and is composed of a first pillar part 181 and a head part 182 having a circular cross section provided at the end of the first pillar part 181. This is designed to allow the first corresponding coupling part 48, which will be described later, to be coupled and rotated. This will be described in detail below.

[0080] The second connecting part 19 is formed at a portion spaced inward from the first connecting part 18, and comprises a second pillar part 191 protruding from the frame 10 to the rear surface, and a locking part 192 bent from the second pillar part 191 toward the first connecting part 18, and is characterized in that an upper end of the locking part 192 is formed with an inclined part 192a so that the thickness of the end part of the locking part 192 becomes thinner.

[0081] In addition, the first connecting portion 18 and the second connecting portion 19 are formed along the longitudinal direction of the frame 10, and the first corresponding connecting portion 48 and the second corresponding connecting portion 49 described later are also provided at positions corresponding to the first connecting portion 18 and the second connecting portion 19 along the longitudinal direction of the cover 40.

[0082] 8 shows the cover 40. The cover 40 is formed with a first mating portion 48 corresponding to the first mating portion 18, and the first mating portion 48 is a groove into which the head portion 182 of the first mating portion 18 can be fitted. The first mating portion 48 further has a separation prevention protrusion 481 protruding outward from the inside thereof, which is for preventing the cover 40 from being separated in the up-down direction when the cover 40 is mated to the frame 10.

[0083] Of course, the shape is irrelevant even if the first connecting portion 18 and the first corresponding connecting portion 48 are interchanged, and therefore the scope of the right should not be interpreted in a restrictive manner.

[0084] The second corresponding coupling portion 49 comprises a third pillar portion 491 protruding from the cover 40 and a corresponding locking portion 492 bent forward and inward from the third pillar portion 491, and it is preferable that the third pillar portion 491 and the corresponding locking portion 492 are configured to form an obtuse angle.

[0085] In addition, the second connecting portion 19 and the second corresponding connecting portion 49 are also unrelated even if their shapes are interchanged, and therefore the scope of the rights should not be interpreted in a restrictive manner.

[0086] In addition, when the first connecting portion 18 and the first corresponding connecting portion 48 are pulled into each other, a slight gap must be created between the first connecting portion 18 and the first corresponding connecting portion 48. The fixing method will be described in more detail below with reference to FIG. 9.

[0087] 9 shows [A], [B], and [C] in the order of assembling the cover 40 to the frame 10. First, as shown in Fig. 9[A], the cover 40 is stood upright on the frame 10 and positioned so that the first coupling portion 18 is fitted into the first corresponding coupling portion 48 consisting of a groove.

[0088] Then, when the inside of the cover 40 is pressed to rotate the first connecting portion 18 and the first corresponding connecting portion 48 as a rotation axis, the corresponding locking portion 492 is positioned outside the locking portion 192, and more precisely, although not shown in the drawing, the front portion of the corresponding locking portion 492 is positioned at the rear portion of the locking portion 192.

[0089] At this time, when a user pushes the cover 40 outward, it is slightly pushed outward due to the clearance between the first coupling portion 18 and the first corresponding coupling portion 48. At this time, it is preferable that the overlap width between the locking portion 192 and the corresponding locking portion 492 is 0.1 mm.

[0090] This is a width that allows the corresponding locking portion 492 to pass through the locking portion 192 even if the user applies a small amount of force. If further force is applied so that the end of the corresponding locking portion 492 passes through the end of the locking portion 192 as shown in FIG. 9[B], and then the pressure is removed, the cover 40 moves inward again to the state shown in FIG. 9[C], and preferably, the end of the corresponding locking portion 492 is located at the front end portion of the end of the locking portion 192 (meaning the lower end in the drawing), and as a result, the overlap width between the locking portion 192 and the corresponding locking portion 492 is 0.2 mm, which prevents the cover 40 from being separated arbitrarily.

[0091] In addition, the inclined portion 192a formed on the upper portion of the locking portion 192 allows the corresponding locking portion 492 to pass through the locking portion 192 more easily, and since the corresponding locking portion 492 is formed at an obtuse angle from the third pillar portion 491 when the cover 40 is separated, it is configured to pass through the locking portion 192 more easily, thereby improving assembly convenience and allowing the user to easily assemble and install.

[0092] Furthermore, the present invention is configured such that a light blocking member DS is further introduced to the rear surface of the frame 10 to completely block light leakage.

[0093] As described above, in the present invention, four frame segments 11 are interconnected and four covers 40 are assembled together correspondingly, but a problem occurs in that gaps occur between adjacent cover segments 41, causing light leakage. To solve this problem, as shown in Fig. 12[A], an adhesive light blocking member DS is further provided at each corner of the cover 40 consisting of the four cover segments 41, so as to completely block light leakage from the gaps between the cover segments 41.

[0094] In addition, as shown in FIG. 12[B], the present invention further includes an attachment member VT on the front surface of the frame 10 so that the user can easily attach the frame 10 to the installation surface, and the attachment member (VT) is preferably made of a hook-and-loop fastener having female and male ends, but this is merely one embodiment and other methods such as magnets and tapes can also be used.

[0095] The cable 331 connected to the light emitting unit 30 is configured as a jack 332 by jack 332 type, and the present invention further includes a separate auxiliary adapter SA for power supply as shown in FIG. 13. The auxiliary adapter SA is connected to a main power source and can directly transmit electricity supplied from the main power source, but also has a charging section inside to charge the electrical energy supplied from the main power source, thereby making it possible to supply electricity to the light emitting unit 30 even without main electricity.

[0096] That is, for this purpose, the auxiliary adapter SA is provided with a terminal portion SA1 into which the jack 332 of the cable 331 is inserted, and a plurality of terminal portions SA1 are provided so as to be capable of emitting light from a plurality of light emitting devices at one time, and a main cable MC that can be connected to a main power source is further provided, and although not shown in the drawing, it is obvious that a main cable MC terminal to which the main cable MC is connected is further provided.

[0097] Furthermore, the auxiliary adapter SA is further provided with a control module for controlling the light emitting unit 30, and this control module may include functions such as ON / OFF, dimming, and timer functions of the light emitting unit 30.

[0098] Here, the timer function can include ON / OFF time settings, light emission duration settings, and the like.

[0099] The dimming function is a function for adjusting the brightness of the light-emitting unit 30, and means not only simple brightness adjustment but also brightness adjustment according to a specific rule.

[0100] In addition, in the case of an RGB LED, it is possible to further set color change rules.

[0101] In addition, the auxiliary adapter SA is further provided with a wireless transceiver unit so that the control module can be remotely controlled via a user's mobile device, and the user can remotely control the control module via the wireless transceiver unit on the mobile device to set the power ON / OFF, dimming, timer function, etc. of the light emitting unit 30. Of course, for this purpose, it is obvious that a separate application for controlling the control module is further installed on the user's mobile device, and therefore the scope of the right should not be interpreted as being limited.

[0102] FIG. 14 shows a variant according to the invention, more precisely a one-touch coupling block, which is another variant of the attachment member (VT).

[0103] As shown in Figs. 14 and 15, the one-touch joining block TB includes a first block B1 which is provided on a surface to be installed (which may generally be a pillar of a building) and has a pair of fixed arms B13 protruding from both sides, a second block B2 which is provided on a side of a frame 10 and has a fitting groove B21 into which the first block B1 is pulled, and a pull-in groove B23 which is provided in the fitting groove B21 and into which the fixed arm B13 is pulled, a pull-in prevention weight B33 which is provided on the first block B1 and does not allow the fixed arm B13 to move backward, a handler B31 which guides the lifting and lowering of the pull-in prevention weight B33 and is hingeably connected to the first block B1, and a pull-in prevention means B3 which has a wire B35 which connects the handler B31 and the pull-in prevention weight B33. When the first block B1 is inserted into the fitting groove B21 and the handler B31 is operated, the retraction prevention weight B33 moves between the pair of fixed arms B13, inserting the pair of fixed arms B13 into the retraction groove B23 to fix the first block B1 to the second block B2, and the retraction prevention weight B33 is positioned between the pair of fixed arms B13 to prevent the pair of fixed arms B13 from retracting.

[0104] Each component will be described in more detail below with reference to the drawings. First, the first block B1 and the second block B2 are each made of a rectangular block, although detailed perspective views are not shown in the drawings. First, the second block B2 is provided on an installation surface and has a fitting groove B21 formed in the center into which the first block B1 is pulled, and pull-in grooves B23 are formed on both sides of the fitting groove B21. The pull-in grooves B23 are provided at positions corresponding to the position of the fixed arm B13 when the first block B1 is fitted into the fitting groove B21.

[0105] In addition, as described above, the first block B1 is a rectangular block, and its lower part is configured to be inserted into the fitting groove B21. As shown in the drawing, a T-shaped space B11 is formed in the center, and an outlet passage B12 is formed which communicates with the T-shaped space B11 and opens to both sides of the second block B2. A storage section B335 is formed in the center of the outlet passage B12, in which an anti-pull-in weight B33, which will be described later, is provided.

[0106] First, regarding the fixed arm B13, the first block B1 is provided with a fixed arm B13 protruding from both sides, and the fixed arm B13 is provided in the pull-out path B12 and is configured to protrude from both sides of the first block B1 by the operation of the pull-in prevention weight B33 and be fitted into the pull-in groove B23.

[0107] The fixed arms B13 are further provided with support wings B131 on the outer sides thereof, and return elastic bodies B133 enclosing the fixed arms B13 are provided between the support wings B131 and the edge of the first block B1 so as to receive an elastic force such that the fixed arms B13 are restored toward the inside of the first block B1. When the first block B1 is inserted into or removed from the second block B2, the fixed arms B13 do not protrude, allowing smooth operation.

[0108] In addition, a corresponding inclined portion B135 is further provided at one end of the inside of the fixed arm B13, which is for naturally pushing the fixed arm B13 to both sides when a pull-in prevention weight B33 described later moves.

[0109] The first block B1 is further provided with a handler B31 on both sides thereof, more precisely, on both sides of the upper portion of the first block B1 with reference to Fig. 14, and the handler B31 is one component of the pull-in prevention means B3. The pull-in prevention means B3 will be described in more detail below.

[0110] The retraction prevention means B3 is provided on the first block B1 and includes a retraction prevention weight B33 that prevents the pair of fixed arms B13 from retracting after they are protruded on both sides, a handler B31 hinged to the first block B1, and a wire B35 that connects the handler B31 and the retraction prevention weight B33.

[0111] First, as described above, the anti-retraction weight B33 is attached to the storage section B335 and is located at the lower part between the pair of fixed arms B13 with reference to FIG. 14. The end of the anti-retraction weight B33 is provided with an entrance inclined portion B331 that is in close contact with the corresponding inclined portion B135, and the storage section B335 is further provided with a compression spring B333 that supports the anti-retraction weight B33.

[0112] The compression spring B333 is a spring having an elastic force in a direction to restore the anti-retraction weight B33, where the direction of restoration means the position when the fixed arm B13 is not protruding, as shown in FIG. 14.

[0113] Therefore, when the anti-retraction weight B33 moves between a pair of fixed arms B13, as shown in FIG. 15, the entrance guide portion and the corresponding inclined portion B135 naturally spread the fixed arms B13 and protrude to both sides of the first block B1. Unless the position of the anti-retraction weight changes, the fixed arms B13 cannot retract inward again, thereby maintaining the fixing force between the first block B1 and the second block B2.

[0114] Again, the handler B31 is a member hinged to both sides of the upper portion of the first block B1 through first hinge parts B311 based on the direction of FIG. 14, and the handler B31 can move so that one surface is in close contact with the side of the first block B1 as shown in FIG. 15.

[0115] The handler B31 is a member that controls the movement of the pull-in prevention weight B33, and the handler B31 and the pull-in prevention weight B33 are connected by a wire B35 as shown in the drawing. In order to prevent damage to the wire B35, a first roller B15 is provided at the inner corner 73a of the T-shaped space B11 to support the wire B35, and a second roller B16 is also provided at the end of the T-shaped space B11, i.e., the part where the wire B35 is exposed.

[0116] In the configuration as described above, when the first block B1 is inserted into the second block B2 and then the pair of handlers B31 are folded as shown in FIG. 15, the wire B35 is pulled to move the pull-in prevention weight B33, and as a result of the movement of the pull-in prevention weight B33, the pair of fixed arms B13 protrude from both sides of the first block B1 and fit into the pull-in groove B23, thereby preventing the first block B1 from being separated from the second block B2.

[0117] At this time, in order to maintain the handler B31 in a folded state, the first block B1 and the handler B31 are provided with a first magnet M1 and a second magnet M2, respectively, on the surfaces that are in close contact with each other based on the folded state of the handler B31, and these are fixed by attractive force, thereby preventing the handler B31 from being arbitrarily unfolded, and thereby preventing the pull-in prevention weight B33 from returning.

[0118] In addition, in order to separate the first block B1 from the second block B2, the handler B31 must be unfolded again, but since the handler B31 is firmly attached to the first block B1 by magnetism, it is difficult for the user to unfold the handler B31. To address this, the handler B31 further includes a holding handle B313 hinged to the second hinge portion B312.

[0119] Therefore, as shown in FIG. 15, after removing the holding handle B313, the user can easily spread out the handler B31 by gripping the holding handle B313, and when the handler B31 is spread out, the retraction prevention weight B33 is returned to its original position in the storage section B335 as shown in FIG. 14 by the elastic restoring force of the compression spring B333 that supported the retraction prevention weight B33, and the pair of fixed arms B13 are retracted into the inside of the first block B1 by the elastic force of the return elastic body B133, maintaining a state in which the first block B1 can be separated from the second block B2, thereby maintaining a state in which it can be separated from the installation surface.

[0120] In the above, the present invention has been described with reference to the attached drawings, focusing on a rollable backsheet for a light emitting device having a specific shape, structure and configuration, and a light emitting device using the same. However, the present invention can be modified, changed and replaced in various ways by those skilled in the art, and such modifications, changes and replacements should also be interpreted as falling within the scope of protection of the present invention. [Explanation of symbols]

[0121] B. Back seat L1, L2 light guide pattern Dh high density area Dl low density part BF Base Film 10 Frames 11 Frame division body 12 Bracket housing 121 Anti-detachment section 13 Fixing bracket 131 Headless Bolt 14 Fixed part 15 Width expansion section 16 Panel mounting part 18 1st joint 181 1st pillar section 182 Head 19 Second joint 191 Second pillar section 192 Locking part 192a Slope 20 Translucent Panel 21 Light leak prevention material 30 Light Emitting Unit 31 Illuminating materials 33 PCB 331 Cable 332 Jack 40 Cover 41 Cover division body 48 First Corresponding Joint 481 Anti-detachment protrusion 49 Second corresponding joint 491 Third pillar section 492 Corresponding locking part DS Light Blocking Material SA Auxiliary Adapter SA1 Terminal MC main cable VT Adhesive Material 70 Light guiding pattern 70L Pattern Contour 73a Corner 73b Edge P joining device P1 Drum P2 Table

Claims

1. A base film; a light-guiding pattern having adhesiveness, which is printed with a light-emitting ink mixed with an adhesive so as to be repeatedly formed on the base film; A line printed portion formed on the base film and adhering the base film to a release paper is used, The display comprises a frame (10), a light-transmitting panel (20) provided on the frame (10) and having a pattern portion formed thereon, a light-emitting unit (30) provided on the frame (10) and consisting of a PCB (33) and a light-emitting member (31) so as to irradiate light onto a side surface of the light-transmitting panel (20), and a cover (40) detachably provided on the frame (10), The frame (10) is formed with a first coupling portion (18) and a second coupling portion (19) spaced apart from the first coupling portion (18), The cover (40) is provided with a first corresponding coupling portion (48) and a second corresponding coupling portion (49) which are coupled to the first coupling portion (18) and the second coupling portion (19), respectively; The second coupling part (19) includes a second pillar part (191) formed at a distance from the first coupling part (18) in an inward direction, and a locking part (192) bent from the second pillar part (191) toward the first coupling part (18), The second corresponding coupling portion (49) includes a third pillar portion (491) protruding from the cover (40) and a corresponding locking portion (492) bent forward and inward from the third pillar portion (491), When the first coupling portion (18) is coupled to the first corresponding coupling portion (48), the coupling is performed so as to generate a clearance, When the cover (40) is pressed against the frame (10), the cover (40) is pushed outward by the clearance, and the corresponding locking portion (492) passes through the locking portion (192), and an end of the corresponding locking portion (492) is locked to the locking portion (192), thereby fixing the cover (40) to the frame (10); The rollable backsheet is cut to a required size and introduced as a backsheet (BS) into the light-transmitting panel (20) of the light-emitting device; The light-transmitting panel (20) is further provided with a light-leak prevention member (21) so that after the light irradiated from the light-emitting unit (30) is irradiated onto a side of the light-transmitting panel (20), the light is prevented from leaking to the opposite side, The frame (10) is constructed by assembling a plurality of frame divisions (11) together, the cover (40) is made up of a plurality of cover divisions (41) corresponding to the plurality of frame divisions (11), and an adhesive light-shielding member (DS) is further provided at each corner of the cover (40) to block gaps between adjacent cover divisions (41) and prevent light leakage, The frame (10) is provided with a fixing portion (14) on which the light-emitting unit (30) is provided, the fixing portion (14) is further provided with a width expansion portion (15), a part of the light-emitting unit (30) is configured to be pulled into the width expansion portion (15), and the light-emitting unit (30) is configured to be able to be fixed to the fixing portion (14) by adjusting the position of the light-emitting unit (30) to correspond to the type of the light-emitting unit (30).

2. The light-emitting device described in Claim 1, characterized in that in the rollable backsheet, the line printed portion extends from or is formed adjacent to the edge of the pattern forming portion in which the light-guiding pattern of the base film is formed.

3. In the rollable back sheet, the base film is 2. The light emitting device according to claim 1, comprising: a first layer made of a polypropylene (PP) material; a second layer made of a polyethylene terephthalate (PET) material provided on one surface of the first layer; and a third layer made of the same material as the first layer and provided on one surface of the second layer.

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