Lighted display case

Abstract

The present disclosure provides a light-emitting lamp box, comprising: a front panel, which is a light-transmitting panel; a rear panel, which is provided with a light source; and a side wall part, which comprises a first end and a second end, and is a hollow enclosure structure with both the first end and the second end being open, the first end of the side wall part is fixedly connected with the front panel, the second end of the side wall part is fixedly connected with the rear panel, the light source is located in an accommodating cavity enclosed by the front panel, the side wall part and the rear panel, and the light emitted by the light source can be emitted through the front panel; the inner surface of the side wall part has a relief structure, and the rear panel is parallel to the front panel.

Description

Technical Field

[0001] This disclosure relates to the technical field of light boxes, and in particular to a light-emitting light box. Background Technology

[0002] In the field of commercial display, illuminated light boxes are an important visual communication tool, widely used in brand identification, advertising, and other scenarios. However, existing illuminated light box technologies suffer from numerous problems.

[0003] For example, in terms of structural design, the side walls of traditional light boxes are mostly smooth or flat inner walls, which leads to uneven reflection of light inside the cavity, often resulting in a bright center and dark edges, affecting the display effect.

[0004] Therefore, traditional light boxes have poor optical diffusion effects, often resulting in blurred pattern edges and uneven colors, which affect the visual effect.

[0005] There is an urgent need for a light box with optimized structure and excellent display effect. Utility Model Content

[0006] This disclosure provides a light-emitting light box. The light-emitting light box of this disclosure is implemented through the following technical solution.

[0007] Illuminated light boxes, including: Front panel, wherein the front panel is a light-transmitting panel; The rear panel is equipped with a light source; The sidewall portion includes a first end and a second end. The sidewall portion is a hollow enclosed structure with both the first end and the second end open. The first end of the sidewall portion is fixedly connected to the front panel, and the second end of the sidewall portion is fixedly connected to the rear panel. The light source is located within the receiving cavity enclosed by the front panel, the sidewall portion, and the rear panel. The light emitted by the light source can be emitted through the front panel. The inner surface of the sidewall has an undulating structure, and the rear panel is parallel to the front panel.

[0008] According to at least one embodiment of the present disclosure, the light-emitting light box further includes: An optical diffuser plate is disposed within the receiving cavity and is parallel to the front panel. Light emitted by the light source is diffused by the optical diffuser plate and then emitted from the front panel.

[0009] According to at least one embodiment of the present disclosure, the light-emitting light box further includes: A support portion, the first end of which is fixedly connected to the edge of the optical diffuser plate, the support portion extending in a direction perpendicular to the front panel.

[0010] According to at least one embodiment of the present disclosure, in a light-emitting box, a second end of the sidewall portion is formed with a protrusion extending radially along the sidewall portion, and a second end of the support portion is connected to or abuts against the protrusion.

[0011] According to at least one embodiment of the light box of the present disclosure, the second end of the support portion is connected to or abuts against the rear panel.

[0012] According to at least one embodiment of the present disclosure, a light box has a second end of the sidewall portion having a protrusion extending radially along the sidewall portion, and the rear panel is connected to the second end of the sidewall portion via the protrusion.

[0013] According to at least one embodiment of the light-emitting box of the present disclosure, the inner wall of the side wall portion is formed with a plurality of annular protrusions and a plurality of annular recesses, the annular protrusions and the annular recesses being alternately arranged along a direction perpendicular to the front panel.

[0014] According to at least one embodiment of the light-emitting box of the present disclosure, the support portion covers the annular protrusion and the annular recess in a direction perpendicular to the front panel.

[0015] According to at least one embodiment of the light-emitting light box of this disclosure, the ring is circular, elliptical, arc-shaped, triangular, rectangular, or polygonal.

[0016] According to at least one embodiment of the light-emitting light box of the present disclosure, the ring is a closed ring or a non-closed ring.

[0017] According to at least one embodiment of the present disclosure, in a light-emitting box, a first end of the side wall portion is detachably fixedly connected to the front panel; And / or, the second end of the sidewall portion is detachably fixedly connected to the rear panel.

[0018] According to at least one embodiment of the light-emitting light box of the present disclosure, both the side wall portion and the rear panel are opaque panels.

[0019] According to at least one embodiment of the light-emitting light box of this disclosure, the support portion is made of a transparent material.

[0020] According to at least one embodiment of the light box disclosed herein, the support portion includes a plurality of parallel support rods arranged circumferentially along the side wall portion; or, the support portion is a hollow enclosed structure, and the cross-section of the support portion has the same cross-sectional shape as the side wall portion.

[0021] According to at least one embodiment of the present disclosure, the support portion is fitted to the inner wall of the side wall portion of the light-emitting box.

[0022] According to at least one embodiment of the present disclosure, the light-emitting light box further includes: A colored film, on which patterns and / or text are formed; The colored film is attached to the outer or inner surface of the front panel, or the colored film is attached to the outer or inner surface of the optical diffuser plate.

[0023] According to at least one embodiment of the light-emitting box of the present disclosure, one or more heat dissipation holes are formed on the rear panel. Attached Figure Description

[0024] The accompanying drawings illustrate exemplary embodiments of the present disclosure and, together with the description thereof, serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0025] Figure 1 This is a three-dimensional structural diagram of a light box according to one embodiment of the present disclosure.

[0026] Figure 2 This is a longitudinal cross-sectional view of a light-emitting light box according to one embodiment of the present disclosure, the cross-section being perpendicular to the front panel of the light-emitting light box.

[0027] Figure 3 This is a longitudinal cross-sectional view of a light-emitting light box according to another embodiment of the present disclosure, the cross-section being perpendicular to the front panel of the light-emitting light box.

[0028] Figure 4 yes Figure 3 An enlarged schematic diagram of region B in the image.

[0029] Figure 5 yes Figure 2 An enlarged schematic diagram of area A of the illuminated light box is shown.

[0030] Figure 6 yes Figure 2 The diagram shown is a three-dimensional exploded structure of the light box. Figure 7 yes Figure 3 The diagram shows a three-dimensional exploded structure of the light box.

[0031] Figure 8 This is a schematic diagram of the structure (outer wall surface) of the rear panel according to one embodiment of this disclosure.

[0032] Explanation of reference numerals in the attached figures: 101. Front Panel 102. Side wall portion 103. Rear Panel 1021. Annular protrusion 1022. Annular Recess 1023. Protrusion 201. Optical diffusion plate 202. Support section 301. Light source 1031, heat dissipation holes 104. Screws Detailed Implementation The present disclosure will now be described in further detail with reference to the accompanying drawings and examples. It should be understood that the specific examples described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present disclosure are shown in the accompanying drawings.

[0033] It should be noted that, where there is no conflict, the embodiments and features described in this disclosure can be combined with each other. The technical solutions of this disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] Figure 1 This is a three-dimensional structural diagram of a light box according to one embodiment of the present disclosure.

[0035] Figure 2 This is a longitudinal cross-sectional view of a light-emitting light box according to one embodiment of the present disclosure, the cross-section being perpendicular to the front panel of the light-emitting light box.

[0036] refer to Figure 1 and Figure 2 In one embodiment, the luminous light box 1000 of this disclosure includes: Front panel 101, wherein the front panel 101 is a light-transmitting plate; Rear panel 103, wherein a light source 301 is provided on the rear panel 103; The sidewall portion 102 includes a first end and a second end. The sidewall portion 102 is a hollow enclosed structure with both the first end and the second end open. The first end of the sidewall portion 102 is fixedly connected to the front panel 101, and the second end of the sidewall portion 102 is fixedly connected to the rear panel 103. The light source 301 is located within the receiving cavity enclosed by the front panel 101, the sidewall portion 102, and the rear panel 103. The light emitted by the light source 301 can be emitted through the front panel 101. The inner surface of the sidewall portion has an undulating structure, and the rear panel 103 is parallel to the front panel 101.

[0037] Figure 1 The front panel shown is rectangular, but the front and rear panels can also be polygonal, such as triangles or pentagons, all of which fall within the protection scope of this disclosure.

[0038] The front panel 101 is a light-emitting plate, also known as a light-transmitting plate. The rear panel 103 serves as a mounting plate, on which a light source 301 can be mounted. The light source 301 can be a spherical lamp, and there can be multiple light sources 301, which can form a light source array on the rear panel 103. In other embodiments, the light source 301 can be in the form of a light strip, an LED light panel, etc. This disclosure does not specifically limit the specific type, shape, or arrangement of the light source 301 on the rear panel 103; all of these fall within the protection scope of this disclosure.

[0039] refer to Figure 1 and Figure 2 The side wall portion 102 serves as a connecting and enclosing component, with its first end fixedly connected to the front panel 101 and its second end fixedly connected to the rear panel 103, thereby forming a receiving cavity together with the front panel 101, the side wall portion 102, and the rear panel 103. The light source 301 is located inside the receiving cavity, and the light emitted by the light source 301 can propagate within the cavity and be emitted through the front panel 101 to realize the light-emitting function of the light box.

[0040] The hollow enclosure structure of the side wall portion 102 of this disclosure can be matched according to the shape of the front panel 101 and the rear panel 103. For example, when the front panel 101 is rectangular, the side wall portion 102 can be enclosed in a rectangular frame shape; when the front panel 101 is circular, the side wall portion 102 can be enclosed in a cylindrical shape to adapt to different design requirements, all of which fall within the protection scope of this disclosure.

[0041] The light source 301 can be fixed to the rear panel 103 by means of screws, adhesives or clips.

[0042] The light emitted by the light source 301 propagates towards the front panel 101 within the receiving cavity. The front panel 101 can be made of materials such as acrylic or glass. Light can pass through the front panel 101 to achieve lighting or display effects.

[0043] In particular, by designing the inner surface of the sidewall portion 102 to have an undulating structure, this disclosure achieves multiple reflections and scatterings of light on the inner surface of the sidewall portion 102, making the light distribution within the accommodating cavity more uniform; avoiding the uneven phenomenon of bright center and dark edge commonly found in traditional light boxes; at the same time, it increases the light reflection path, improves the light energy utilization efficiency, and makes the light emission effect of the light box softer and more natural.

[0044] Figure 3 This is a longitudinal cross-sectional view of a light-emitting light box according to another embodiment of the present disclosure, the cross-section being perpendicular to the front panel of the light-emitting light box.

[0045] refer to Figure 1 and Figure 3 ,exist Figure 2Based on the light-emitting light box 1000 shown, the light-emitting light box 2000 of this embodiment further includes: an optical diffuser plate 201, which is disposed within the receiving cavity and is parallel to the front panel 101. The light emitted by the light source 301 is diffused by the optical diffuser plate 201 and then emitted from the front panel 101.

[0046] The optical diffuser plate 201 can be made of optical diffusion materials, such as polycarbonate (PC) plates, polymethyl methacrylate (PMMA) plates, or composite plates with diffusion particles. The optical diffuser plate 201 can uniformly diffuse the light emitted by the light source 301, making the light emitted from the front panel 101 more uniform.

[0047] The optical diffuser plate 201 is set parallel to the front panel 101 to ensure that the light is evenly distributed along the propagation path and improve the uniformity of the overall light output effect.

[0048] In this embodiment, the optical diffuser plate 201 is located inside the receiving cavity, between the light source 301 and the front panel 101. The light emitted by the light source 301 first shines on the optical diffuser plate 201. After being scattered by the optical diffuser plate 201, the light diffuses evenly in all directions and then shines out through the front panel 101 to achieve more uniform lighting or display.

[0049] The size and shape of the optical diffuser plate 201 can be matched with the front panel 101. For example, when the front panel 101 is rectangular, the optical diffuser plate 201 is also rectangular and covers the entire cross-section of the receiving cavity (i.e., the cross-section parallel to the front panel) to maximize the diffusion effect.

[0050] The optical diffuser plate 201 can be installed in the receiving cavity by means of slots, adhesives, or brackets to ensure that its position is stable and does not affect the propagation path of light.

[0051] By configuring the optical diffuser plate 201, this disclosure provides a light box with more uniform light output and better visual effect, which can effectively avoid glare or unevenness caused by direct light source and improve the overall lighting or display quality of the light box.

[0052] Figure 4 yes Figure 3 An enlarged schematic diagram of region B in the image.

[0053] refer to Figure 3 and Figure 4 In a preferred embodiment of this disclosure, the light box 2000 further includes a support portion 202, the first end of which is fixedly connected to the edge of the optical diffuser plate 201, and the support portion 202 extends along a direction perpendicular to the front panel 101.

[0054] The support part 202 serves as a structural support component for the optical diffuser plate 201, and its core function is to ensure the stable positioning of the optical diffuser plate 201 within the cavity.

[0055] In some embodiments, the first end of the support portion 202 is rigidly fixed to the edge of the optical diffuser plate 201 (by means of snap-fit, hot-melt welding, or adhesive bonding), and the support portion 202 extends as a whole along a direction perpendicular to the front panel 101, forming a support structure parallel to the main axis of the light box. This design enables the support portion 202 to effectively resist the deformation stress of the optical diffuser plate 201 due to its own weight, while maintaining the parallel relationship between the optical diffuser plate 201 and the front panel 101.

[0056] In terms of structural implementation, the extension length of the support part 202 can be adjusted according to the thickness of the light box.

[0057] Continue to refer to Figure 4 In a preferred embodiment of this disclosure, the second end of the sidewall portion 102 is formed with a protrusion 1023 extending radially along the sidewall portion 102, and the second end of the support portion 202 is connected to or abuts against the protrusion 1023.

[0058] The protrusion 1023, as a structural extension feature of the side wall portion 102, can be located in the end region of the side wall portion 102 near the rear panel 103, and can provide a positioning reference for the support portion 202.

[0059] Radial extension means that the extension direction of the protrusion 1023 is perpendicular to the circumferential direction of the sidewall portion 102.

[0060] When the sidewall portion 102 is an annular enclosure structure, the radial direction is the direction perpendicular from the central axis of the sidewall portion 102 to the inner or outer surface of the sidewall portion 102.

[0061] The protrusion 1023 extends radially to form a protruding structure, and its extension length enables the second end of the support 202 to obtain a positioning reference or a stable support surface without affecting the installation space of the light source 301.

[0062] In a preferred embodiment of this disclosure, the second end of the support portion 202 is connected to or abuts against the rear panel 103.

[0063] Figure 5 yes Figure 2 An enlarged schematic diagram of region A of the illuminated light box 1000 is shown.

[0064] refer to Figure 4 and Figure 5 In some embodiments of this disclosure, the rear panel 103 is connected to the second end of the sidewall portion 102 via the protrusion 1023.

[0065] In some embodiments of this disclosure, the protrusion 1023 extends continuously along the circumference of the sidewall portion 102 to form a closed annular structure.

[0066] In some other embodiments of this disclosure, there are multiple protrusions 1023, which are distributed circumferentially along the sidewall portion 102.

[0067] refer to Figure 4 and Figure 5 For the light box of the above embodiments, preferably, the inner wall of the side wall portion 102 is formed with a plurality of annular protrusions 1021 and a plurality of annular recesses 1022, and the annular protrusions 1021 and the annular recesses 1022 are arranged alternately along a direction perpendicular to the front panel 101.

[0068] In other words, the inner wall of the sidewall portion 102 is not a smooth plane, but a corrugated or wrinkled surface. These annular protrusions 1021 protrude toward the receiving cavity, while the annular recesses 1022 are recessed in the opposite direction.

[0069] In some embodiments of this disclosure, the annular shape of the annular protrusion 1021 and the annular recess 1022 can be circular, elliptical, arc-shaped, triangular, rectangular, or polygonal, and can be closed or open.

[0070] In this context, the closed form refers to the annular protrusion 1021 and the annular recess 1022 each forming a complete and continuous annular structure without any breaks or gaps. For example, when the annulus is circular, it appears as a complete circle; when the annulus is rectangular, it forms a complete rectangular frame. The closed form ensures that the texture of the inner wall of the sidewall portion 102 is continuously distributed in the circumferential direction, providing a uniform light reflection effect, thereby promoting uniform scattering of light within the receiving cavity.

[0071] In some other embodiments of this disclosure, the annular protrusion 1021 and the annular recess 1022 may be non-closed.

[0072] The non-closed form refers to the fact that the annular protrusion 1021 and the annular recess 1022 each form an incomplete annular structure, having one or more breaks, gaps, or openings. For example, when the annulus is circular, it is a C-shaped arc segment; when the annulus is rectangular, it can form a U-shaped structure.

[0073] The staggered arrangement refers to the alternating arrangement of convex and concave portions along the thickness direction of the light-emitting box (i.e., the direction perpendicular to the front panel 101), for example, forming a periodic wave-like texture from the first end to the second end of the side wall portion 102. This design enhances the light reflection effect of the side wall portion 102 and promotes the uniformity of light emission.

[0074] Preferably, refer to Figure 5 In some embodiments of this disclosure, the support portion 202 covers the annular protrusion 1021 and the annular recess 1022 in a direction perpendicular to the front panel 101. The support portion 202 is made of a transparent material.

[0075] In the direction perpendicular to the front panel 101 (i.e., the thickness direction of the light box), the extension path of the support portion 202 covers the annular protrusion 1021 and annular recess 1022 on the inner wall of the side wall portion 102, and the support portion 202 can fit into these protrusions and recesses. The support portion 202 is made of a transparent material (such as transparent plastic or glass composite material) to allow the light emitted by the light source 301 to pass through freely, avoid shadows or light blockage, not affect the reflection of light by the annular recess and annular protrusion, maintain the uniform diffusion effect of the optical diffuser plate 201, and improve the overall light output quality.

[0076] This disclosure further optimizes the optical performance of the light-emitting light box by combining the transparent support part with the annular convex and concave structure.

[0077] refer to Figure 4 and Figure 5 The rear panel 103 and the protrusion 1023 of the side wall 102 can be fixedly connected by screws 104. This disclosure does not specifically limit the specific connection method between the two.

[0078] For the light box of the various embodiments described above, the first end of the side wall portion 102 is detachably fixedly connected to the front panel 101; and / or, the second end of the side wall portion 102 is detachably fixedly connected to the rear panel 103.

[0079] Both the side wall portion 102 and the rear panel 103 are opaque panels. The opaque panels can effectively prevent light emitted from the light source 301 from leaking out from the side wall portion 102 or the rear panel 103, ensuring that light is emitted only from the front panel 101, thereby improving light emission efficiency and avoiding light pollution.

[0080] In some embodiments, the inner surfaces of the sidewall portion 102 and the rear panel 103 may be further coated with a reflective layer (such as a silver coating or aluminum foil) to enhance the reflection and utilization of light within the cavity.

[0081] The sidewalls can be made of ABS injection molding material, and the rear panel can be made of aluminum composite panel. This disclosure does not impose any special limitations on the materials of the sidewalls and the rear panel. For example, the sidewalls 102 can also be made of other engineering plastics such as PC or metal alloys to meet different environmental requirements (such as high temperature resistance or waterproofing); the rear panel 103 can be made of metal plate or composite material to provide good heat dissipation performance and structural strength.

[0082] In some embodiments of this disclosure, the support portion 202 includes a plurality of parallel support rods arranged circumferentially along the sidewall portion 102. These support rods may be evenly distributed around the edge of the optical diffuser plate 201 to form a spaced-apart support frame, with each support rod extending from the edge of the optical diffuser plate 201 to the protrusion 1023 or the rear panel 103, providing distributed support force to alleviate concentrated stress.

[0083] In some other embodiments of this disclosure, the support portion 202 is a hollow enclosed structure, and the cross-section of the support portion 202 (the cross-section perpendicular to the thickness direction of the light-emitting light box) has the same shape as the cross-section of the side wall portion 102 (the cross-section perpendicular to the thickness direction of the light-emitting light box), providing uniform support in the entire circumference and enhancing the overall structural rigidity. For example, when the cross-section of the side wall portion 102 is rectangular, the cross-section of the support portion 202 is also rectangular.

[0084] Figure 6 yes Figure 2 The diagram shown is a three-dimensional exploded structure of the light box. Figure 7 yes Figure 3 The diagram shows a three-dimensional exploded structure of the light box.

[0085] refer to Figure 6 and Figure 7 In some embodiments of this disclosure, the light box further includes: A colored film, on which patterns and / or text are formed; The colored film is attached to the outer or inner surface of the front panel 101, or the colored film is attached to the outer or inner surface of the optical diffuser plate 201.

[0086] refer to Figure 6 The colored film can be attached to the outer or inner surface of the front panel 101.

[0087] refer to Figure 7 The colored film can be attached to the outer or inner surface of the optical diffusion plate 201.

[0088] The colored film can be attached to the front panel 101 or the optical diffusion plate 201 by electrostatic adsorption, reversible adhesive or magnetic adsorption, so that users can replace the colored film with different patterns and / or text according to their needs and update the content displayed on the light box.

[0089] In particular, when the colored film is attached to the optical diffuser plate 201, the light emitted by the light source 301 is first homogenized by the optical diffuser plate 201, and then passes through the colored film to form a display effect with uniform color and clear pattern / text boundaries, effectively avoiding the problems of blurred pattern / text edges or uneven brightness caused by direct light shining on the front panel in traditional light boxes.

[0090] Figure 6 and Figure 7 The image also exemplarily shows a side wall portion 102 in the form of a frame, and a light source 301 in the form of a light strip.

[0091] The transformer of the light source 301 disclosed herein is preferably mounted on the rear panel 103 and located within the receiving cavity described above. For example, the light source 301 in the form of a light strip or the light source 301 in the form of an LED light panel can be configured with a long strip transformer, which can be mounted on the inner side of the rear panel 103, that is, the long strip transformer is also located within the receiving cavity described above.

[0092] The built-in transformer design solves the problems of inconvenient installation and space limitations caused by the external transformer in traditional light boxes, making it suitable for installation environments with limited space. The built-in transformer and the light source 301 are integrated into the same cavity, simplifying the installation process and optimizing the overall heat dissipation performance of the light source and transformer.

[0093] Figure 8 This is a schematic diagram (outer wall surface) of the rear panel 103 according to one embodiment of the present disclosure.

[0094] refer to Figure 8 In some embodiments of this disclosure, one or more heat dissipation holes 1031 are formed on the rear panel 103.

[0095] The shape of the heat dissipation holes can be a long groove or a circular hole, etc. This disclosure does not impose any special limitations on the number or shape of the heat dissipation holes, and all of them fall within the protection scope of this disclosure.

[0096] In summary, the light box of this disclosure features a unique structural design. In particular, the undulating structure of the inner wall of the side wall (preferably with alternating annular protrusions and annular concave sections), combined with the optical diffuser and transparent support, significantly improves the uniformity of light emission and solves the problems of uneven brightness and dark edges commonly found in traditional light boxes.

[0097] In the description of this specification, the references to terms such as "one embodiment / mode," "some embodiments / modes," "example," "specific example," or "some examples," etc., refer to specific features, structures, or characteristics described in connection with that embodiment / mode or example, which are included in at least one embodiment / mode or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment / mode or example. Moreover, the specific features, structures, or characteristics described may be combined in any suitable manner in one or more embodiments / modes or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments / modes or examples described in this specification, as well as the features of different embodiments / modes or examples.

[0098] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0099] Those skilled in the art should understand that the above embodiments are merely for illustrating the present disclosure and are not intended to limit the scope of the disclosure. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present disclosure.

Claims

1. A luminous light box, characterized in that, include: Front panel, wherein the front panel is a light-transmitting panel; The rear panel is equipped with a light source; as well as The sidewall portion includes a first end and a second end. The sidewall portion is a hollow enclosed structure with both the first end and the second end open. The first end of the sidewall portion is fixedly connected to the front panel, and the second end of the sidewall portion is fixedly connected to the rear panel. The light source is located within the receiving cavity enclosed by the front panel, the sidewall portion, and the rear panel. The light emitted by the light source can be emitted through the front panel. The inner surface of the sidewall has an undulating structure, and the rear panel is parallel to the front panel.

2. The light box according to claim 1, characterized in that, The light box also includes: An optical diffuser plate is disposed within the receiving cavity and is parallel to the front panel. Light emitted by the light source is diffused by the optical diffuser plate and then emitted from the front panel.

3. The luminous light box according to claim 2, characterized in that, The light box also includes: A support portion, the first end of which is fixedly connected to the edge of the optical diffuser plate, the support portion extending in a direction perpendicular to the front panel.

4. The luminous light box according to claim 3, characterized in that, The second end of the sidewall portion has a protrusion extending radially along the sidewall portion, and the second end of the support portion is connected to or abuts against the protrusion.

5. The luminous light box according to claim 3, characterized in that, The second end of the support is connected to or abuts against the rear panel.

6. The light box according to claim 1, characterized in that, The second end of the sidewall portion has a protrusion extending radially along the sidewall portion, and the rear panel is connected to the second end of the sidewall portion via the protrusion.

7. The light box according to any one of claims 3 to 5, characterized in that, The inner wall of the sidewall portion has a plurality of annular protrusions and a plurality of annular recesses, and the annular protrusions and annular recesses are arranged alternately along a direction perpendicular to the front panel.

8. The light box according to claim 7, characterized in that, In a direction perpendicular to the front panel, the support portion covers the annular protrusion and the annular recess.

9. The light box according to claim 7, characterized in that, The ring can be circular, elliptical, arc-shaped, or polygonal.

10. The light-emitting light box according to claim 7, characterized in that, The ring can be a closed ring or a non-closed ring.

11. The light box according to any one of claims 1 to 3, characterized in that, The first end of the side wall portion is detachably and fixedly connected to the front panel; And / or, the second end of the sidewall portion is detachably fixedly connected to the rear panel.

12. The light-emitting light box according to claim 1 or 2, characterized in that, Both the side wall and the rear panel are opaque.

13. The light-emitting light box according to claim 3, characterized in that, The support portion is made of transparent material.

14. The light-emitting light box according to claim 3 or 13, characterized in that, The support portion includes a plurality of parallel support rods arranged circumferentially along the side wall portion; or, the support portion is a hollow enclosed structure, and the cross-section of the support portion has the same shape as the cross-section of the side wall portion.

15. The luminous light box according to claim 3, characterized in that, The support portion is fitted to the inner wall of the side wall portion.

16. The light-emitting light box according to claim 2, characterized in that, The light box also includes: A colored film, on which patterns and / or text are formed; The colored film is attached to the outer or inner surface of the front panel, or the colored film is attached to the outer or inner surface of the optical diffuser plate.

17. The light-emitting light box according to claim 1 or 2, characterized in that, One or more heat dissipation holes are formed on the rear panel.

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