Side light-emitting LED panel lamp

Abstract

The utility model relates to a side light-emitting LED panel lamp which comprises a shell, a light-emitting assembly, a light guide plate and a diffusion plate, and the shell is provided with a cavity with a downward opening. The light guide plate and the diffusion plate are both transversely arranged in the cavity, the diffusion plate is located below the light guide plate, the light-emitting assembly is located between the inner side wall of the cavity and the outer side wall of the light guide plate, the light guide plate is an injection molding light guide plate, and the light-emitting assembly is located between the inner side wall of the cavity and the outer side wall of the light guide plate. And a gap is formed between the lower surface of the light guide plate and the upper surface of the diffusion plate in the vertical direction. The injection molding light guide plate is provided with glue inlet points, light spots are easily generated at the glue inlet points when the panel lamp emits light, and then the gap distance between the lower surface of the light guide plate and the upper surface of the diffusion plate needs to be increased to weaken the light spots. According to the LED panel lamp, the injection molding light guide plate with lower production cost can be used for the LED panel lamp by utilizing the small change in the structure of the LED panel lamp.

Description

Technical Field

[0001] The utility model relates to the technical field of lighting fixtures, in particular to a side-emitting LED panel lamp. Background Art

[0002] LED panel light is a high-end indoor lighting fixture with LED as its light source. The whole lamp is beautifully designed and simple, which not only has good lighting effects but also brings aesthetic feeling to people.

[0003] LED panel lights are available in two types: side-emitting and direct-emitting. The structure of side-emitting LED panel lights primarily includes a frame, diffuser, light guide plate, light bar, reflective film, and backplane. Light from the LED beads enters the light guide plate from the emitting surface. After hitting the reflective points on the light guide plate, it exits downward, radiating out from the luminaire's emitting surface. Light that doesn't hit the reflective points is reflected back by the reflective film, converting most of the LED bead light into illumination. After passing through the highly transmittance light guide plate, the LED panel light creates a uniform, planar light pattern, resulting in a soft, comfortable, and bright light that effectively alleviates eye fatigue.

[0004] Among them, the quality of the light guide plate is an important criterion for measuring the quality of side-emitting panel lights. In the existing technology, the light guide plate is generally formed by cutting the plate. Therefore, the production process of the light guide plate includes at least forming and cutting, and the process flow is relatively complicated. In addition, the cutting process will also cause waste of the plate, especially when cutting circular light guide plates. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a low-cost side-emitting LED panel lamp in view of the current status of the existing technology.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: a side-emitting LED panel light, comprising a housing, a light-emitting component, a light guide plate, and a diffuser plate, wherein the housing has a downwardly opening chamber; the light guide plate and the diffuser plate are both arranged horizontally in the chamber, the diffuser plate is located below the light guide plate, and the light-emitting component is located between the inner side wall of the chamber and the outer side wall of the light guide plate; the light guide plate is an injection-molded light guide plate, and a gap is vertically separated from the lower surface of the light guide plate and the upper surface of the diffuser plate. The injection-molded light guide plate has a glue feed point, and the glue feed point is prone to generating light spots when the panel light emits light. Therefore, a gap is provided between the lower surface of the light guide plate and the upper surface of the diffuser plate to weaken the light spots, thereby ensuring uniform light emission on the diffuser plate.

[0007] In order to weaken the light spot at the glue feeding point, the gap between the lower surface of the light guide plate and the upper surface of the diffuser plate is not less than 1 / 8 of the thickness of the light guide plate. A glue feeding point is provided on the lower surface of the light guide plate, and the distance between the glue feeding point and the upper surface of the diffuser plate is also 1 / 8 of the thickness of the light guide plate.

[0008] Preferably, the gap distance between the lower surface of the light guide plate and the upper surface of the diffuser plate is not less than 1 / 5 of the thickness of the diffuser plate.

[0009] In order to ensure the light guiding effect of the light guide plate, the thickness of the light guide plate is 2 to 4 mm. The thicker the light guide plate, the worse the light guiding effect. In this embodiment, the light guide plate with a thickness of 2 to 4 mm is a thinner light guide plate, which is conducive to improving the brightness of light.

[0010] Preferably, the diffusion plate has a thickness of 0.5 to 2.5 mm.

[0011] Preferably, the diffusion plate has a thickness of 1.2 to 1.5 mm.

[0012] To improve the light transmission of the panel light, the upper surface of the light guide plate is equipped with reflective spots, and the gap between the lower surface of the light guide plate and the upper surface of the diffuser plate is no less than 1 mm. If only the upper surface of the light guide plate has reflective spots, the light transmittance of the light guide plate is high, resulting in noticeable light spots at the injection point of the injection molding light guide plate. Therefore, it is necessary to increase the gap between the lower surface of the light guide plate and the upper surface of the diffuser plate to reduce the light spots.

[0013] To enhance the softness of the panel light's illumination, the light guide plate is provided with reflective points on both its upper and lower surfaces. The gap between the lower surface of the light guide plate and the upper surface of the diffuser plate is no less than 0.5 mm. Having reflective points on both the upper and lower surfaces of the light guide plate produces a softer light output, and the light spot produced at the injection molding point of the light guide plate is less noticeable. Therefore, a gap of no less than 0.5 mm between the lower surface of the light guide plate and the upper surface of the diffuser plate is sufficient.

[0014] To shield the light spot generated by the edge of the light guide plate and maintain a constant distance between the lower surface of the light guide plate and the upper surface of the diffuser, the light-emitting assembly includes a light strip arranged circumferentially along the inner sidewall of the chamber. A light-shielding ring is provided in the gap between the lower surface of the light guide plate and the upper surface of the diffuser, located below the light strip. This light-shielding ring shields the light spot generated by the light strip at the edge of the light guide plate. Furthermore, the light-shielding ring, located between the light guide plate and the diffuser, defines the distance between them. Specifically, the thickness of the light-shielding ring is equal to the distance between the light guide plate and the diffuser.

[0015] Compared with the existing technology, the advantages of the present invention are: using an injection-molded light guide plate, and increasing the gap distance between the lower surface of the light guide plate and the upper surface of the diffuser to weaken the light spot generated at the glue feeding point of the injection-molded light guide plate. The present invention utilizes a slight change in the structure of the LED panel light, so that the LED panel light can use an injection-molded light guide plate with lower production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a side-emitting LED panel light in an embodiment of the present utility model;

[0017] Figure 2 for Figure 1 Cross-sectional view of the mid-side emitting LED panel light;

[0018] Figure 3 for Figure 2 Enlarged view of point A in the middle. DETAILED DESCRIPTION

[0019] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0020] Example 1

[0021] like Figures 1 to 3 The figure shows a preferred embodiment of the side-emitting LED panel light of the present invention, which includes a housing 1, a light-emitting component 2, a light guide plate 3, a diffuser plate 4, a light-shielding ring 5 and reflective paper 6. The housing 1 has a downwardly opening chamber 1a; the light-emitting component 2, light guide plate 3, diffuser plate 4, light-shielding ring 5 and reflective paper 6 are arranged inside the chamber 1a. The housing 1 is also externally connected to a power supply component 100.

[0022] Specifically, the housing 1 has a top wall 11, with an annular wall 12 extending downward from its periphery. Together, the top wall 11 and the annular wall 12 enclose the aforementioned chamber 1a. A face ring 13 extends horizontally outward from the lower periphery of the annular wall 12. The center of the top wall 11 is recessed downward to form a lower recess 111, and the inner side of the annular wall 12 is provided with a circle of retaining grooves 121 arranged along the circumference of the annular wall 12. Reflective paper 6, light guide plate 3, light shielding ring 5, and diffuser plate 4 are disposed horizontally within the chamber 1a, in descending order.

[0023] The upper surface of the reflective paper 6 contacts the lower recess 111 of the top wall 11 , and the lower surface of the reflective paper 6 contacts the light guide plate 3 .

[0024] The light guide plate 3 is a 3 mm thick injection-molded light guide plate. Its upper surface is provided with reflective spots, and its lower surface has a glue-in point created during injection molding. A light-emitting component 2 is provided between the outer wall of the light guide plate 3 and the annular wall 12. In this embodiment, the light-emitting component 2 is a light strip 21, which is arranged around the inner wall of the chamber 1a. The light strip 21 is provided with a plurality of spaced-apart lamp beads, the height of which is consistent with that of the light guide plate 3. A 1 mm gap is vertically spaced between the lower surface of the light guide plate 3 and the upper surface of the diffuser plate 4. The injection-molded light guide plate has a glue-in point on its lower surface. When light from the lamp beads enters the light guide plate 3 and then exits downward from the light guide plate, a light spot is generated at the glue-in point of the light guide plate 3. The gap between the lower surface of the light guide plate 3 and the upper surface of the diffuser plate 4 can be used to reduce the light spot.

[0025] Furthermore, to block the light spot generated by the edge of the light guide plate 3 and control the distance between the lower surface of the light guide plate 3 and the upper surface of the diffuser plate 4, a light shielding ring 5 is installed in the gap between the lower surface of the light guide plate 3 and the upper surface of the diffuser plate 4. The light shielding ring 5 is located directly below the light-emitting assembly 2. The thickness of the light shielding ring 5 is consistent with the gap between the light guide plate 3 and the diffuser plate 4, both being 1 mm. This function not only blocks the light spot generated by the light strip 21 at the edge of the light guide plate 3, but also ensures the distance between the light guide plate 3 and the diffuser plate 4 by the thickness of the light shielding ring 5.

[0026] The diffuser plate 4 is 1.5 mm thick, and its periphery snaps into the aforementioned retaining groove 121, securing the reflective paper 6, light guide plate 3, light shielding ring 5, and diffuser plate 4 within chamber 1a. The diffuser plate 4 can be manufactured by either injection molding or cutting. Injection molding involves forming each diffuser plate 4 from a single mold, resulting in thicker diffuser plates 4, such as up to 2.5 mm. Cutting involves cutting each diffuser plate 4 from a large sheet of material, resulting in thinner diffuser plates 4, such as only 1 mm.

[0027] Compared with the existing technology, the advantages of the present invention are: using an injection-molded light guide plate, and increasing the gap distance between the lower surface of the light guide plate 3 and the upper surface of the diffuser plate 4 to weaken the light spot generated at the glue feeding point of the injection-molded light guide plate. The present invention utilizes a slight change in the structure of the LED panel light, so that the LED panel light can use an injection-molded light guide plate with lower production cost.

[0028] Example 2

[0029] The difference from Example 1 is that reflective spots are provided on both the upper and lower surfaces of the light guide plate 3, and the gap between the lower surface of the light guide plate 3 and the upper surface of the diffuser plate 4 is 0.5 mm. When reflective spots are provided on both the upper and lower surfaces of the light guide plate 3, the light emitted by the light guide plate 3 is softer, and the light spot generated at the injection point of the injection-molded light guide plate is less noticeable. Therefore, the gap between the lower surface of the light guide plate 3 and the upper surface of the diffuser plate 4 must be no less than 0.5 mm.

Claims

1. A side-emitting LED panel light, comprising a housing (1), a light-emitting component (2), a light guide plate (3) and a diffuser plate (4), wherein the housing (1) has a downwardly opening chamber (1a); the light guide plate (3) and the diffuser plate (4) are both laterally arranged in the chamber (1a); the diffuser plate (4) is located below the light guide plate (3); the light-emitting component (2) is located between the inner side wall of the chamber (1a) and the outer side wall of the light guide plate (3); and the light-emitting component (2) is located between the inner side wall of the chamber (1a) and the outer side wall of the light guide plate (3). The light guide plate (3) is an injection-molded light guide plate, and a gap is vertically spaced between the lower surface of the light guide plate (3) and the upper surface of the diffusion plate (4).

2. The side-emitting LED panel light according to claim 1, characterized in that: The gap distance between the lower surface of the light guide plate (3) and the upper surface of the diffusion plate (4) is not less than 1 / 8 of the thickness of the light guide plate (3).

3. The side-emitting LED panel light according to claim 2, characterized in that: The gap distance between the lower surface of the light guide plate (3) and the upper surface of the diffusion plate (4) is not less than 1 / 5 of the thickness of the diffusion plate (4).

4. The side-emitting LED panel light according to claim 3, characterized in that: The thickness of the light guide plate (3) is 2 to 4 millimeters.

5. The side-emitting LED panel light according to claim 4, characterized in that: The diffusion plate (4) has a thickness of 0.5 to 2.5 mm.

6. The side-emitting LED panel light according to claim 5, characterized in that: The diffusion plate (4) has a thickness of 1.2 to 1.5 millimeters.

7. The side-emitting LED panel light according to claim 6, characterized in that: The upper surface of the light guide plate (3) is provided with a light reflecting point, and the gap distance between the lower surface of the light guide plate (3) and the upper surface of the diffusion plate (4) is not less than 1 mm.

8. The side-emitting LED panel light according to claim 6, characterized in that: The upper surface and the lower surface of the light guide plate (3) are both provided with light reflecting points, and the gap distance between the lower surface of the light guide plate (3) and the upper surface of the diffusion plate (4) is not less than 0.5 mm.

9. The side-emitting LED panel light according to any one of claims 1 to 7, characterized in that: The light-emitting assembly (2) comprises a light strip (21) circumferentially arranged along the inner side wall of the chamber (1a); A light shielding ring (5) is provided in the gap between the lower surface of the light guide plate (3) and the upper surface of the diffusion plate (4), and the light shielding ring (5) is located below the light strip (21).

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