A COB light source uniform light emitting device

Abstract

The utility model discloses a COB light source uniform light emitting device, belonging to the technical field of light emitting devices. A COB light source uniform light emitting device includes a bottom plate, and also includes: a plurality of substrates are fixed above the bottom plate, and the substrates are provided with a high color temperature area and a low color temperature area; a reflective wall is provided on both sides above the bottom plate, and a convex panel and a fluorescent panel are provided on the reflective wall respectively; a triangular reflective plate is fixed on both sides above the bottom plate; the upper end surface of the bottom plate, the inner wall of the reflective wall and the inclined surface of the triangular reflective plate are respectively coated with a reflective coating; compared with the traditional symmetrical arrangement structure, the utility model reduces the dark area generated, and through the scattering of the convex panel, the light intensity appears more uniform, and through the reflection of the reflective coating, the utilization rate of the light source is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of light emitting devices, in particular to a COB light source uniform light emitting device. Background Art

[0002] As a new type of lighting source, COB light source is particularly suitable for indoor lighting, commercial lighting, stage lighting and other scenes that require high brightness and uniform light due to its high light output, uniform light distribution and excellent heat dissipation performance. These advantages make the application of COB light source in the lighting field more extensive and flexible than LED light source.

[0003] At present, COB is mainly used in light strip lighting in various places. However, most of the COB light strips on the market are simply fixed on the onboard chip on the PBC board, and the PBC board is fixed on the light strip carrier by colored glue. Due to the simple packaging structure, it often causes the loss of part of the light source and the uneven distribution of the light source. Based on this, the utility model is proposed. Utility Model Content

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a COB light source uniform light emitting device which can overcome the above problems or at least partially solve the above problems.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A COB light source uniform light emitting device comprises a bottom plate, and also includes: a plurality of substrates are fixed above the bottom plate, and the substrates are provided with a high color temperature area and a low color temperature area; reflective walls are provided on both sides above the bottom plate, and the reflective walls are respectively provided with a convex panel and a fluorescent panel; triangular reflective plates are fixed on both sides above the bottom plate; and reflective coatings are respectively coated on the upper end surface of the bottom plate, the inner wall of the reflective wall and the inclined surface of the triangular reflective plate.

[0007] Preferably, a plurality of mounting grooves are formed on the lower end surface of the bottom plate, and a metal plate is disposed in each mounting groove.

[0008] Preferably, a low color temperature negative electrode, a low color temperature positive electrode, a high color temperature positive electrode and a high color temperature negative electrode are respectively provided on the substrate, and the heights of the low color temperature positive electrode and the low color temperature negative electrode are higher than the high color temperature positive electrode and the high color temperature negative electrode.

[0009] Furthermore, the light sources in the high color temperature zone and the low color temperature zone are arranged in a circular array, and the sum of the number of light sources in the high color temperature zone and the number of light sources in the low color temperature zone are equal.

[0010] Preferably, the reflective coating is a plurality of cross-stacked SiO2 layers and SiN4 layers.

[0011] Preferably, the plurality of substrates are arranged on the bottom plate in a staggered manner.

[0012] Preferably, the upper surface of the fluorescent plate is convex and can be coated with fluorescent coatings of different colors.

[0013] Preferably, both upper and lower end surfaces of the convex panel are convex surfaces, and the convex panel is made of a transparent colloid.

[0014] Compared with the prior art, the utility model provides a COB light source uniform light emitting device, which has the following beneficial effects:

[0015] 1. The COB light source uniform light-emitting device can increase the width of the light-emitting band by arranging the substrates in a staggered manner, and reduce the dark area generated compared to the traditional symmetrical arrangement structure, making the light intensity appear more uniform.

[0016] 2. The COB light source uniform light emitting device can reflect the light source from below and the side onto the fluorescent plate through the reflective coating on the bottom plate, the reflective wall and the triangular reflective plate, thereby increasing the utilization rate of the light source, and through the scattering of the convex panel, the light source distribution is more uniform.

[0017] 3. The COB light source uniform light emitting device can effectively absorb and conduct the heat emitted by the COB light source to increase the heat dissipation effect by installing the metal plate into the installation groove, and the metal plate can support and limit the flexible bottom plate, which is convenient for users to arrange and install.

[0018] The parts not involved in the device are the same as the existing technology or can be implemented by the existing technology. Compared with the traditional symmetrical arrangement structure, the utility model reduces the area of ​​the dark area generated, and through the scattering of the convex panel, the light intensity appears more uniform. Through the reflection of the reflective coating, the utilization rate of the light source is increased. The metal plate increases the heat dissipation effect and can provide rigid support for the bottom plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an exploded view of a COB light source uniform light emitting device proposed by the utility model;

[0020] Figure 2 This is a side view of a COB light source uniform light emitting device proposed by the utility model;

[0021] Figure 3 This is an arrangement distribution diagram of the substrate in a COB light source uniform light emitting device proposed by the utility model;

[0022] Figure 4 This is a top view of the substrate part of a COB light source uniform light emitting device proposed by the utility model;

[0023] Figure 5 This is a side view of a substrate portion of a COB light source uniform light emitting device proposed by the utility model.

[0024] In the figure: 1. bottom plate; 2. triangular reflector; 3. reflective wall; 4. substrate; 5. metal plate; 6. reflective coating; 7. fluorescent plate; 8. convex panel; 9. mounting groove; 10. low color temperature negative electrode; 11. low color temperature positive electrode; 12. high color temperature positive electrode; 13. high color temperature negative electrode; 14. low color temperature area; 15. high color temperature area. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0027] Embodiment 1:

[0028] Reference Figure 1-Figure 5 A COB light source uniform light emitting device includes a bottom plate 1, and also includes: a plurality of substrates 4 are fixed above the bottom plate 1, and a high color temperature area 15 and a low color temperature area 14 are provided on the substrate 4; reflective walls 3 are provided on both sides above the bottom plate 1, and a convex panel 8 and a fluorescent panel 7 are provided on the reflective wall 3 respectively; triangular reflective plates 2 are fixed on both sides above the bottom plate 1; and reflective coatings 6 are coated on the upper end surface of the bottom plate 1, the inner wall of the reflective wall 3 and the inclined surface of the triangular reflective plate 2 respectively.

[0029] In the utility model, the reflective coating 6 on the bottom plate 1 can reflect the light source irradiated to the bottom to the top, and after multiple reflections of the reflective coating 6 on the reflective wall 3, the light source is finally emitted through the fluorescent plate 7. When manufacturing the triangular reflector 2, the inclination angle of the reflective slope can be appropriately adjusted according to the distance between the triangular reflector 2 and the substrate 4 to achieve the best reflection effect, thereby reducing the loss of the light source and increasing the utilization rate of the light source.

[0030] The convex panel 8 can scatter the light source below for the first time, so that the light source distribution is more uniform. After being refracted by the reflective wall 3, it is finally emitted through the fluorescent plate 7. The upper surface of the fluorescent plate 7 has a certain roughness, so that the light source is emitted by diffuse reflection, and the emitted light source is more uniform and soft.

[0031] When manufacturing the reflective coating 6, multiple layers of cross-stacked SiO2 layers and Si3N4 layers can be used to complete the coating in a positive vacuum coating manner. The SiO2 layers and Si3N4 layers are high-quality insulating materials. This method is uniform and fast in coating and is suitable for large-scale manufacturing.

[0032] Embodiment 2:

[0033] Reference Figure 1-Figure 5 , which is basically the same as Example 1, and further, a plurality of mounting grooves 9 are provided on the lower end surface of the bottom plate 1, and a metal plate 5 is provided in each mounting groove 9, and a low color temperature negative electrode 10, a low color temperature positive electrode 11, a high color temperature positive electrode 12 and a high color temperature negative electrode 13 are respectively provided on the substrate 4, and the heights of the low color temperature positive electrode 11 and the low color temperature negative electrode 10 are higher than the high color temperature positive electrode 12 and the high color temperature negative electrode 13, and the reflective coating 6 is a multi-layer cross-stacked SiO2 layer and Si3N4 layer, and the light sources in the high color temperature area 15 and the low color temperature area 14 are arranged in a circular array, and the sum of the number of light sources in the high color temperature area 15 and the low color temperature area 14 is equal, and a plurality of substrates 4 are arranged in a staggered manner on the bottom plate 1, and the upper surface of the fluorescent plate 7 is a convex surface and can be coated with fluorescent coatings of different colors, and the upper and lower end surfaces of the convex panel 8 are both convex surfaces, and the convex panel 8 is a transparent colloid.

[0034] In the utility model, the height designs of the low color temperature negative electrode 10, the low color temperature positive electrode 11, the high color temperature positive electrode 12 and the high color temperature negative electrode 13 are different, so that they can be more easily distinguished. By arranging the light sources in the low color temperature zone 14 and the high color temperature zone 15 in a circular array, the light sources can be dispersed more evenly. The sum of the number of light sources in the high color temperature zone 15 and the low color temperature zone 14 is equal, so that the hue of the light source combined by the two can be more accurate. At the same time, different color temperatures can be adjusted by adjusting different currents to pass through the high color temperature zone 15 and the low color temperature zone 14. By arranging multiple substrates 4 in a staggered manner, the illumination surface of the light strip is wider, the range of illumination is increased, the number of light sources is saved, and the dark area generated is reduced compared with the traditional symmetrical arrangement structure, so that the light distribution is more uniform.

[0035] The upper and lower convex surfaces of the convex panel 8 are both smooth, which can reduce the energy lost when the light source is refracted. The upper surface of the fluorescent plate 7 is convex, which can refract the light source twice, so that the light tube is finally dispersed in a larger range. The color of the fluorescent coating determines the final color of the light strip. The light source is diffusely reflected by fluorescent plates 7 of different colors, and finally presents different light colors.

[0036] The lower end surface of the base plate 1 is provided with glue, and both sides of the metal plate 5 are provided with glue. The metal plate 5 is packaged separately when leaving the factory, so as to avoid the problem that the entire light strip cannot be coiled up after the metal plate 5 is installed, resulting in a large space occupation. When installing the light strip, the metal plate 5 can be adhered to the installation groove 9 by glue and then the light strip can be pasted to the desired installation position. The metal plate 5 can support and limit the flexible base plate 1 to avoid the light strip from twisting during installation. At the same time, the metal plate 5 can quickly conduct heat and increase the heat dissipation effect.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A COB light source uniform light emitting device, comprising a base plate (1), characterized in that: Also includes: A plurality of substrates (4) are fixed above the bottom plate (1), and a high color temperature area (15) and a low color temperature area (14) are provided on the substrates (4); Reflective walls (3) are provided on both sides above the bottom plate (1); and convex panels (8) and fluorescent panels (7) are provided on the reflective walls (3); Triangular reflective plates (2) are fixed on both sides above the bottom plate (1); The upper end surface of the bottom plate (1), the inner wall of the reflective wall (3) and the inclined surface of the triangular reflective plate (2) are respectively coated with a reflective coating (6).

2. A COB light source uniform light emitting device according to claim 1, characterized in that: The lower end surface of the bottom plate (1) is provided with a plurality of installation grooves (9), and a metal plate (5) is arranged in each installation groove (9).

3. A COB light source uniform light emitting device according to claim 1, characterized in that: The substrate (4) is provided with a low color temperature negative electrode (10), a low color temperature positive electrode (11), a high color temperature positive electrode (12) and a high color temperature negative electrode (13) respectively, and the low color temperature positive electrode (11) and the low color temperature negative electrode (10) are higher than the high color temperature positive electrode (12) and the high color temperature negative electrode (13).

4. A COB light source uniform light emitting device according to claim 3, characterized in that: The light sources in the high color temperature zone (15) and the low color temperature zone (14) are arranged in a circular array, and the sum of the number of light sources in the high color temperature zone (15) and the number of light sources in the low color temperature zone (14) is equal.

5. A COB light source uniform light emitting device according to claim 3, characterized in that: The reflective coating (6) is a plurality of cross-stacked SiO2 layers and Si3N4 layers.

6. A COB light source uniform light emitting device according to claim 1, characterized in that: The plurality of substrates (4) are arranged on the bottom plate (1) in a staggered manner.

7. A COB light source uniform light emitting device according to claim 1, characterized in that: The upper surface of the fluorescent plate (7) is convex and can be coated with fluorescent coatings of different colors.

8. A COB light source uniform light emitting device according to claim 1, characterized in that: The upper and lower end surfaces of the convex panel (8) are both convex surfaces, and the convex panel (8) is a transparent colloid.

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