Flat panel lamp

Abstract

The application discloses a flat lamp. The flat lamp comprises a lamp disc, a light guide plate, a light source and a diffusion plate. The light guide plate is radially reduced to form a first step structure and a second step structure. Light emitted by the light source enters the light guide plate from a first incident surface of the first step structure, part of the light is emitted from the diffusion plate, and part of the light is reflected by the reflective paper and then emitted from the diffusion plate. Due to the up-down staggered first step structure and the second step structure, the distance between the light source and the diffusion plate is widened, and the bright edge condition of the diffusion plate can be avoided. A first reflective paper is attached to the first incident surface, a second light-absorbing adhesive paper is attached to the inner side edge of the lamp disc, and a third light-absorbing adhesive paper is attached to the outer side of the lamp disc and the diffusion plate, so that the light intensity inside and around the flat lamp can be well controlled, useless leakage light can be absorbed, the leakage light interference can be avoided, and the bright edge condition of the flat lamp is further ensured.

Description

Technical Field

[0001] This invention relates to the field of lighting technology, and in particular to a flat panel lamp. Background Technology

[0002] Currently, there are two main types of flat panel lights on the market: one type achieves uniform brightness of the light-emitting surface by accumulating a large number of LEDs; the other type achieves uniform brightness of the light-emitting surface by relying on a light guide plate.

[0003] Flat panel lights relying on light guide plates generally include a light panel, a light guide plate, a light source, and a diffuser plate. The light guide plate and light source are housed within the light panel. Light from the light source enters from the side of the light guide plate and then exits through the diffuser plate. The light source is fixed within the light panel; side illumination from the light source is refracted through the light guide plate, and the light is reflected downwards through a reflective surface. The diffuser plate diffuses and diffuses the light source. However, this type of side-emitting flat panel light has a problem where the edge of the diffuser plate contacts the light source, resulting in a bright, high-gloss edge on the lamp's edge. For example, the flat panel light disclosed in Publication No. CN204227110U has a diffuser plate edge that contacts the LED light assembly, causing a bright, high-gloss edge on the lamp's edge. Summary of the Invention

[0004] In view of this, the present invention addresses the deficiencies of the prior art, and its main objective is to provide a flat panel lamp that not only increases the distance between the light source at the edge of the diffuser plate, but also eliminates the bright edge highlights, thereby overcoming the shortcomings of the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This application provides a flat panel light, including a lamp disk, a light guide plate, a light source, and a diffuser plate; the light guide plate and the light source are disposed inside the lamp disk, with the light source facing the light guide plate, and the diffuser plate is attached to the light guide plate;

[0007] The light guide plate is radially reduced to form a first stepped structure and a second stepped structure; the first stepped structure has a first injection surface; the second stepped structure has a first emission surface; the light emitted by the light source enters the light guide plate from the first injection surface; a first reflective sticker is affixed to the first emission surface; a first light-absorbing adhesive paper is affixed to the outside of the first reflective sticker;

[0008] A second light-absorbing adhesive paper is affixed to the inner edge of the lamp panel;

[0009] The third light-absorbing adhesive paper is attached to the outer surface of the lamp plate and the diffuser plate; the edge-wrapping paper is wrapped around the lamp plate, the light guide plate, and the diffuser plate.

[0010] Preferably, the lamp panel is provided with reflective paper.

[0011] Preferably, the outer edge of the lamp panel is provided with a fastening part; the edge of the diffuser plate is provided with a fastening groove; and the fastening part is fastened to the fastening groove.

[0012] Preferably, the buckle is provided with folded ears on both the left and right sides, and the folded ears are bent inward and fastened into the buckle groove.

[0013] Preferably, the back of the light guide plate is laser-engraved with a diffusion grid or dots.

[0014] Preferably, the first step structure is located within the lamp panel, and the second step structure abuts against the edge of the lamp panel.

[0015] Preferably, the third light-absorbing adhesive paper is applied to one-half or one-third of the thickness of the diffuser plate.

[0016] Preferably, the frame surrounds the lamp panel, light guide plate, and diffuser plate.

[0017] This application provides a method for eliminating the bright edge of a flat panel light, including a light panel, a light guide plate, a light source, and a diffuser plate; reflective paper is provided inside the light panel;

[0018] The light guide plate is radially reduced to form a first stepped structure and a second stepped structure. The first stepped structure has a first injection surface; the second stepped structure has a first emission surface; the light source is disposed around the first injection surface, and the light emitted by the light source enters the light guide plate from the first injection surface; a first reflective sticker and a first light-absorbing adhesive paper are disposed on the first emission surface; the light from the first emission surface is reflected back into the light guide plate by the first reflective sticker; the first light-absorbing adhesive paper is disposed outside the first reflective sticker to absorb the light leaking from the edge of the first emission surface.

[0019] Reflective paper is installed inside the lamp panel; the first step structure is installed inside the lamp panel, and the reflective paper reflects the light from the light guide plate, so that the light is emitted from the diffuser plate; the back of the light guide plate is laser-engraved with a diffusion grid or dots, so that the light that re-enters the light guide plate from the reflective paper is diffused; the outer surface of the diffuser plate is coated with a diffusion layer so that the light emitted from the diffuser plate is further diffused.

[0020] A second light-absorbing adhesive paper is attached to the inner edge of the lamp panel. The second light-absorbing adhesive paper absorbs the light leaking from the first stepped structure and the back of the light source.

[0021] The third light-absorbing adhesive paper is attached to the outer surface of the lamp plate and the diffuser plate, and the third light-absorbing adhesive paper absorbs the light leaking from the sides of the lamp plate and the diffuser plate.

[0022] The outer edge of the lamp panel is provided with a fastening part; the edge of the diffuser plate is provided with a fastening groove; the fastening part is fastened to the fastening groove; the edge wrapping paper wraps the lamp panel, light guide plate, and diffuser plate, so that the lamp panel, light guide plate, and diffuser plate are firmly assembled together.

[0023] Preferably, the third light-absorbing adhesive paper is applied to one-half or one-third of the thickness of the diffuser plate to reduce the intensity of light emitted from the side of the diffuser plate.

[0024] Compared with existing technologies, this invention has significant advantages and beneficial effects. Specifically, as shown in the above technical solution, the flat panel lamp includes a lamp disk, a light guide plate, a light source, and a diffuser plate. The light guide plate and the light source are disposed within the lamp disk, with the light source facing the side of the light guide plate, and the diffuser plate is attached to the light guide plate. The light guide plate radially narrows to form a first stepped structure and a second stepped structure; the first stepped structure has a first incident surface; the second stepped structure has a first exit surface; light emitted by the light source enters the light guide plate from the first incident surface; a first reflective sticker is affixed to the first exit surface; and a first light-absorbing adhesive paper is affixed to the outside of the first reflective sticker. Therefore, a gap is left between the first incident surface of the first stepped structure and the diffuser plate to avoid bright edges. Simultaneously, the first reflective sticker affixed to the first exit surface reflects light back to the light guide plate, preventing light loss. Furthermore, the first light-absorbing adhesive paper affixed to the outside of the first reflective sticker absorbs light leaking from the edge of the first reflective sticker, preventing light leakage from affecting the diffuser plate.

[0025] A second light-absorbing adhesive paper is affixed to the inner edge of the lamp panel. This second light-absorbing adhesive paper can absorb light leaking from the first stepped structure and the back of the light source, preventing localized light leakage.

[0026] The third light-absorbing adhesive tape is affixed to the outer surface of the lamp panel and diffuser plate. This tape absorbs light leaking from the lamp panel, light guide plate, and diffuser plate, ensuring that the entire structure remains light-free.

[0027] The edge-sealing paper wraps around the lamp panel, light guide plate, and diffuser plate, making the three a single unit. At the same time, the frame wraps around the lamp panel, light guide plate, and diffuser plate, and the fasteners fasten into the fastening grooves, making the flat panel lamp have good overall integrity and a sturdy structure.

[0028] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0029] Fig. 1 This is a structural schematic diagram of an embodiment of the present invention.

[0030] Fig. 2 This is a side view schematic diagram of an embodiment of the present invention.

[0031] Fig. 3 This is an exploded view of an embodiment of the present invention.

[0032] Fig. 4This is a partial structural cross-sectional schematic diagram of an embodiment of the present invention.

[0033] Explanation of reference numerals in the attached diagram:

[0034] 10. Lamp panel; 11. Second light-absorbing adhesive paper

[0035] 12. Third type of light-absorbing adhesive paper 13. Reflective paper

[0036] 14. Binding paper 15. Button

[0037] 16. Folded ear 17. Buckle groove

[0038] 18. Light source 19. Diffuser plate

[0039] 20. Light guide plate 21. First step structure

[0040] 22. First injection surface; 23. Second step structure

[0041] 24. First injection surface 25. First reflective sticker

[0042] 26. First light-absorbing adhesive paper; 27. Diffusion grid.

[0043] 28. Double-sided tape. Detailed Implementation

[0044] Please refer to Figs. 1 to 4 As shown, it illustrates the specific structure of a preferred embodiment of the present invention, which is a flat panel lamp.

[0045] The light guide plate 20 is radially reduced to form a first stepped structure 21 and a second stepped structure 23, creating a gap between the first incident surface 22 of the first stepped structure 21 and the diffuser plate 19, effectively preventing bright edges. Simultaneously, the first reflective sticker 25 reflects light from the first exit surface 24 back to the light guide plate 20, preventing light loss. Furthermore, the first light-absorbing adhesive paper 26, the second light-absorbing adhesive paper 11, and the third light-absorbing adhesive paper 12 absorb their respective leaked light, preventing light leakage interference.

[0046] This application provides a flat panel lamp, including a lamp disk 10, a light guide plate 20, a light source 18, and a diffuser plate 19; the light guide plate 20 and the light source 18 are disposed within the lamp disk 10, with the light source 18 facing the light guide plate 20, and the diffuser plate 19 is attached to the light guide plate 20; the light guide plate 20 is radially reduced to form a first stepped structure 21 and a second stepped structure 23; the first stepped structure 21 has a first injection surface 22; the second stepped structure 23 has a first emission surface 24; the light emitted by the light source 18 enters the light guide plate 20 from the first injection surface 22; a first reflective sticker 25 is attached to the first emission surface 24; a first light-absorbing adhesive paper 26 is attached to the outside of the first reflective sticker 25; a second light-absorbing adhesive paper 11 is attached to the inner edge of the lamp disk 10; a third light-absorbing adhesive paper 12 is attached to the outer surfaces of the lamp disk 10 and the diffuser plate 19; and edging paper 14 wraps around the lamp disk 10, the light guide plate 20, and the diffuser plate 19. Preferably, a reflective paper 13 is provided inside the lamp disk 10. The reflective paper 13, the first stepped structure 21 of the light guide plate 20, and the light source 18 are disposed inside the lamp disk 10. The light emitted by the light source 18 enters the light guide plate 20 through the first incident surface 22 of the first stepped structure 21. Part of the light diffuses directly from the diffuser plate 19, and part of the light is reflected by the reflective paper 13 and re-enters the light guide plate 20, and then diffuses from the diffuser plate 19. The diffusion layer is preferably disposed on the outer side of the diffuser plate 19 to ensure the diffusion effect. Since the first stepped structure 21 and the second stepped structure 23 are vertically staggered, there is a certain distance between the edge of the diffuser plate 19 and the light source 18, thus preventing bright edges. In particular, because the first stepped structure 21 and the second stepped structure 23 are vertically staggered, only a very small amount of light entering the light guide plate 20 from the first incident surface 22 will reach the first exit surface 24 of the second stepped structure 23, further ensuring no bright edges. Simultaneously, the first reflective sticker 25 will reflect the light from the first emission surface 24 back to the light guide plate 20, avoiding light loss. The light source 18 is preferably an LED light source 18. It should be noted that the distance between the first stepped structure 21 and the diffuser plate 19 can be set as needed and is not specifically limited. The light guide plate 20 and the diffuser plate 19 are preferably bonded together with double-sided adhesive 28.

[0047] The function of the first light-absorbing adhesive tape 26: The first light-absorbing adhesive tape 26 is attached to the outside of the first reflective sticker 25. The first light-absorbing adhesive tape 26 can absorb the light leaking from the edge of the first reflective sticker 25, preventing the leaked light from affecting the diffuser plate 19. The function of the second light-absorbing adhesive tape 11: The second light-absorbing adhesive tape 11 is attached to the inner edge of the lamp disk 10. That is, the second light-absorbing adhesive tape 11 is located behind the light source 18. The second light-absorbing adhesive tape 11 can absorb the light coming out of the first stepped structure 21 and the light reflected from the back of the light source 18. This can prevent the light leaking from the first stepped structure 21 from affecting the second stepped structure 23, further preventing bright edges, and also making the light softer and more uniform. The function of the third light-absorbing adhesive tape 12: The third light-absorbing adhesive tape 12 is attached to the outer surface of the lamp disk 10 and the diffuser plate 19. Therefore, the third light-absorbing adhesive tape 12 can absorb the leaked light from the lamp disk 10, the light guide plate 20, and the periphery of the lamp disk 10, ensuring brightness and further ensuring brightness uniformity, and preventing bright edge problems. The first light-absorbing adhesive paper 26, the second light-absorbing adhesive paper 11, and the third light-absorbing adhesive paper 12 are preferably black light-blocking adhesive paper / light-blocking tape / light-blocking tape for lamps, etc., which can absorb light and prevent light from passing through. Therefore, the overall brightness control of the first light-absorbing adhesive paper 26, the second light-absorbing adhesive paper 11, and the third light-absorbing adhesive paper 12 is very good, and there is no light interference between them, ensuring uniform and soft brightness of the lamp. This further ensures that no bright edges appear.

[0048] Preferably, the outer edge of the lamp panel 10 is provided with a fastening part 15; the edge of the diffuser plate 19 is provided with a fastening groove 17; the fastening part 15 fastens into the fastening groove 17. Preferably, the left and right sides of the fastening part 15 are provided with folded ears 16, which are bent inward and fastened into the fastening groove 17. The edge binding paper 14 wraps around the lamp panel 10, the light guide plate 20, and the diffuser plate 19; the fastening part 15 passes through the clearance opening provided on the edge of the diffuser plate 19, and then the folded ears 16 are bent inward and fastened into the fastening groove 17, thereby wrapping the lamp panel 10, the light guide plate 20, and the diffuser plate 19 with the edge binding paper. This makes the entire flat panel lamp structure sturdy and compact, and very convenient to assemble. At the same time, the third light-absorbing adhesive paper 12 is pasted on the sides of the lamp panel 10, the light guide plate 20, and the diffuser plate 19, so the overall flat panel lamp is more secure.

[0049] Preferably, the back of the light guide plate 20 is laser-engraved with a diffusion grid 27. Some light is diffused by the diffusion grid 27 before re-entering the light guide plate 20 after being reflected by the reflective paper 13, thus allowing for better light diffusion and illumination. The light guide plate 20 is preferably an acrylic light guide plate. The laser-engraved diffusion grid 27 results in a finer grid and softer light.

[0050] Preferably, the first step structure 21 is located within the lamp panel 10, and the second step structure 23 abuts against the edge of the lamp panel 10. This structure helps to increase the distance between the light source 18 and the light guide plate 20. When no frame is provided, the flat panel light is a frameless flat panel light; when a frame is provided, it is a framed flat panel light, which is beneficial for product upgrades and modifications.

[0051] Preferably, when the third light-absorbing adhesive paper 12 is attached to the side of the lamp disk 10, the light guide plate 20, and the diffuser plate 19, the third light-absorbing adhesive paper 12 is attached to one-half or one-third of the thickness of the diffuser plate 19. This helps to make the lamp disk 10, the light guide plate 20, and the diffuser plate 19 more firmly assembled. At the same time, the third light-absorbing adhesive paper 12 can reduce the brightness of the edge of the diffuser plate 19 without absorbing too much light from the side of the diffuser plate 19, which helps to ensure the brightness and uniformity of light.

[0052] This application provides a method for eliminating the bright edge of a flat panel light, including a light panel 10, a light guide plate 20, a light source 18, and a diffuser plate 19; a reflective paper 13 is disposed inside the light panel 10. Light emitted from the light source 18 enters the light guide plate 20 from the first incident surface 22, part of the light is directly emitted from the diffuser plate 19, and part of the light is reflected by the reflective paper 13 inside the light panel 10 and then emitted from the diffuser plate 19.

[0053] The light guide plate 20 is radially reduced to form a first stepped structure 21 and a second stepped structure 23. The first stepped structure has a first incident surface 22; the second stepped structure has a first exit surface 24. The light source 18 is disposed around the first incident surface 22, and the light emitted by the light source 18 enters the light guide plate 20 from the first incident surface 22. The first stepped structure 21 and the second stepped structure 23 are staggered vertically, increasing the distance between the light source 18 and the edge of the diffuser plate 19, thus avoiding bright edges. In addition, the staggered vertical arrangement of the first stepped structure 21 and the second stepped structure 23 reduces mutual interference between them, ensuring uniform brightness and preventing bright edges.

[0054] A first reflective sticker 25 and a first light-absorbing adhesive paper 26 are disposed on the first emission surface 24. Light from the first emission surface 24 is reflected back into the light guide plate 20 by the first reflective sticker 25. The first light-absorbing adhesive paper 26 is disposed on the outer side of the first reflective sticker 25 to absorb light leaking from the edge of the first emission surface 24. The first emission surface 24 is located on the second stepped structure 23. The first reflective sticker 25 reflects the light from the first emission surface 24 back into the light guide plate 20, preventing light loss. At the same time, the first light-absorbing adhesive paper 26 absorbs the light leaking from the edge of the first reflective sticker 25, preventing the leaked light from affecting the diffuser plate 19.

[0055] A reflective paper 13 is installed inside the lamp panel 10. The first stepped structure is located inside the lamp panel 10. The reflective paper 13 reflects the light from the light guide plate 20, allowing the light to exit from the diffuser plate 19. The back of the light guide plate 20 is laser-engraved with a diffusion grid 27 or dots, so that the light re-entering the light guide plate 20 from the reflective paper 13 is first diffused. The outer surface of the diffuser plate 19 is coated with a diffusion layer to further diffuse the light emitted from the diffuser plate 19. The laser-engraved diffusion grid 27 or dots provide better illumination and higher uniformity. Therefore, under the action of the diffusion grid 27 and the diffuser plate 19, the flat panel lamp has a dual diffusion effect, resulting in higher light uniformity, softer light, and better illumination.

[0056] A second light-absorbing adhesive paper 11 is affixed to the inner edge of the lamp panel 10. The second light-absorbing adhesive paper 11 absorbs the light leaking from the first stepped structure 21 and the back of the light source 18. The second light-absorbing adhesive paper 11 ensures that the light leaking from the vicinity of the first stepped structure 21 and the back of the light source 18 is absorbed, preventing the leaked light from affecting the second stepped structure 23 and preventing uneven brightness.

[0057] The third light-absorbing adhesive tape 12 is affixed to the outer surfaces of the lamp panel 10 and the diffuser plate 19. The third light-absorbing adhesive tape 12 absorbs light leaking from the sides of the lamp panel 10 and the diffuser plate 19. The affixing of the third light-absorbing adhesive tape 12 to the sides of the lamp panel 10, the diffuser plate 19, and the second step structure 23 enhances the overall integrity and structural robustness of the flat panel lamp. The third light-absorbing adhesive tape 12 also absorbs some light from the second step structure and the vicinity of the diffuser plate 19, ensuring uniform edge illumination without bright edges and eliminating light leakage interference.

[0058] The edge binding paper 14 wraps around the lamp panel 10, light guide plate 20, and diffuser plate 19, ensuring they are securely assembled together. The outer edge of the lamp panel 10 has a fastening part 15; the edge of the diffuser plate 19 has a fastening groove 17; and the fastening part 15 fastens into the fastening groove 17. Therefore, with the combined action of the edge binding paper 14, the fastening part 15, and the fastening groove 17, the entire flat panel lamp structure is very sturdy and will not loosen.

[0059] Preferably, the third light-absorbing adhesive paper 12 is attached to one-half or one-third of the thickness of the diffuser plate 19 to reduce the intensity of light emitted from the side of the diffuser plate 19 and further ensure that the edges of the diffuser plate 19 are not bright.

[0060] In summary, the key design feature of this invention is that the light guide plate 20 is radially reduced to form a first stepped structure 21 and a second stepped structure 23, leaving a gap between the first incident surface 22 of the first stepped structure 21 and the diffuser plate 19, thus avoiding bright edges. Simultaneously, the combined effect of the first reflective sticker 25, the second light-absorbing adhesive paper 11, and the third light-absorbing adhesive paper 12 effectively controls the light intensity inside and around the flat panel light, and absorbs unwanted light leakage, further ensuring that the flat panel light does not exhibit bright edges.

[0061] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A flat panel lamp, characterized in that: It includes a lamp plate (10), a light guide plate (20), a light source (18), and a diffuser plate (19); the light guide plate (20) and the light source (18) are disposed inside the lamp plate (10), and the light source (18) faces the light guide plate (20), and the diffuser plate (19) is attached to the light guide plate (20). The light guide plate (20) is radially reduced to form a first stepped structure (21) and a second stepped structure (23); the first stepped structure (21) has a first injection surface (22); the second stepped structure (23) has a first emission surface (24); the light emitted by the light source (18) enters the light guide plate (20) from the first injection surface (22); a first reflective sticker (25) is affixed to the first emission surface (24); a first light-absorbing adhesive paper (26) is affixed to the outside of the first reflective sticker (25); A second light-absorbing adhesive paper (11) is attached to the inner edge of the lamp plate (10). The third light-absorbing adhesive paper (12) is attached to the outer side of the lamp plate (10) and the diffuser plate (19); the edge wrapping paper (14) is wrapped around the lamp plate (10), the light guide plate (20), and the diffuser plate (19).

2. The flat panel lamp according to claim 1, characterized in that: The lamp plate (10) is provided with reflective paper (13).

3. The flat panel lamp according to claim 1, characterized in that: The outer edge of the lamp plate (10) is provided with a fastening part (15); the edge of the diffuser plate (19) is provided with a fastening groove (17); the fastening part (15) is fastened to the fastening groove (17).

4. The flat panel lamp according to claim 3, characterized in that: The buckle (15) is provided with folded ears (16) on both sides, and the folded ears (16) are bent inward and fastened into the buckle groove (17).

5. The flat panel lamp according to claim 1, characterized in that: The back of the light guide plate (20) is laser-engraved with a diffusion grid (27) or dots.

6. The flat panel lamp according to claim 1, characterized in that: The first step structure (21) is located in the lamp plate (10), and the second step structure (23) abuts against the edge of the lamp plate (10).

7. The flat panel lamp according to claim 1, characterized in that: The third light-absorbing adhesive paper (12) is attached to one-half or one-third of the thickness of the diffuser plate (19).

8. The flat panel lamp according to claim 1, characterized in that: The light panel (10), light guide plate (20), and diffuser plate (19) are surrounded by a frame.

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