A light bar

Abstract

The application discloses a light uniformization lamp strip which comprises an outer shell, the outer shell is provided with a containing cavity, the outer shell is provided with at least one first opening which is communicated with the containing cavity; a connecting body is arranged in the containing cavity, the connecting body is provided with a first cavity which is communicated with the first opening, and a second cavity is arranged between the first cavity and the bottom wall of the containing cavity; a light source body is arranged in the second cavity; and a light adjusting body is arranged in the first cavity and located between the light source body and the first opening. The light adjusting body is arranged in and partially exposed to the opening of the outer shell, so that the homogenized light is directly or nearly directly emitted into the environment, the light loss and the uniformity deterioration caused by the interface of the traditional protective cover are minimized, and the excellent light uniformization effect of the light adjusting body is ensured. The light uniformization body and the light transmission body are directly connected to form an optical continuum in the light adjusting body, the light efficiency loss of the light emitting interface is further avoided, and the light emitting effect of the light emitting port is extremely uniform and bright.

Description

Technical Field

[0001] This application relates to the technical field of lighting, and particularly to a uniform light bar. Background Art

[0002] In the prior art of this field, the principle of a light strip to achieve multi-color light emission is usually as follows: LED chips that can respectively emit three primary color lights of red, green, and blue are used as light-emitting units. Taking three LED chips as a group, they are arranged in a "pin" shape or a linear shape to form a light-emitting body, and a semi-transparent lamp cover is covered outside the light-emitting body to form a lamp bead. By respectively adjusting the light-emitting intensities of the three LEDs of red, green, and blue, the three-color lights are mixed inside the lamp bead and then emitted through the lamp cover, thereby enabling the lamp bead to emit lights of different colors.

[0003] However, the existing protective lamps with a "pin" shape or a linear structure still have obvious deficiencies in actual use. First, in terms of structure, such lamps only rely on a single-layer semi-transparent lamp cover to mix the light beams emitted by the three-color LEDs. Limited by the LED arrangement method and the internal optical space of the lamp cover, it is difficult for different color lights to fully diffuse and be evenly superimposed, resulting in local color spots or overall color deviation in the emitted light. Second, in terms of protection performance, the common lamp cover structure has weak sealing performance, is easily invaded by environmental water vapor and dust, affecting the life and light-emitting efficiency of the LEDs; at the same time, the external mechanical protection is insufficient, and problems such as LED displacement and solder joint loosening are likely to occur under vibration or impact conditions, reducing the reliability of the lamp and the scope of applicable environments. Utility Model Content

[0004] The purpose of this application is to provide a uniform light bar to solve the problem of improving the uniformity of the lamp tube.

[0005] A uniform light bar provided by this application adopts the following technical solution: It includes an outer shell body, the outer shell body is provided with an accommodation cavity, and the outer shell body is provided with at least one first opening communicating with the accommodation cavity; a connecting body, the connecting body is arranged in the accommodation cavity, the connecting body is provided with a first cavity communicating with the first opening, and a second cavity is arranged between the first cavity and the bottom wall of the accommodation cavity; a light source body, the light source body is arranged in the second cavity; a dimming body, the dimming body is arranged in the first cavity and is located between the light source body and the first opening; wherein, at least part of the dimming body is located at the first opening.

[0006] By adopting the above technical solution, in traditional light strips, the light after homogenization needs to pass through a transparent protective cover. This interface causes light loss due to refraction and reflection, and may also cause secondary interference to the homogenized light field, resulting in brightness attenuation and uniformity degradation. This solution places the dimming element at and partially exposes it at the first opening, allowing the light, after being homogenized by the dimming element, to directly or only through a very short distance of air medium into the environment. This minimizes the final interface interference before light emission, ensuring that the excellent homogenization effect obtained from the dimming element is transmitted to the user without loss.

[0007] Optionally, the dimming body includes a light-diffusing body and a light-transmitting body, which are connected to each other.

[0008] By adopting the above technical solution, the homogenizer and the light-transmitting body are directly connected internally, forming an optical continuum. This allows light, after homogenization, to directly enter the final emission stage without passing through an exit interface with air or other media that would lead to light efficiency loss and uniformity degradation. This ensures that the near-perfect uniform light field created by the homogenizer can be maintained and output to the maximum extent, thereby achieving an extremely uniform and bright light emission effect at the light exit port.

[0009] Optionally, the first cavity and the second cavity are connected, and the light source body is connected to the dimming body.

[0010] By adopting the above technical solution, the air gap between the light source and the light guide / uniform component in the traditional structure is eliminated, avoiding light energy loss caused by Fresnel reflection at the interface due to refractive index mismatch. Light energy can be directly injected into the dimming body to the maximum extent, which significantly improves the overall light efficiency.

[0011] Optionally, the first cavity and the second cavity are independent cavities.

[0012] By adopting the above technical solution, the light source and the dimming body are separated, which effectively prevents the heat generated by the light source from being directly conducted to the temperature-sensitive dimming body. This prevents uneven light output or decreased efficiency caused by thermal expansion of the dimming body material or changes in optical performance, and improves the thermal stability and lifespan of the product.

[0013] Optionally, the outer surface of the outer shell is provided with a light-shielding layer, and the inner wall of the cavity is provided with a reflective layer.

[0014] By adopting the above technical solution, a reflective layer is set on the inner wall of the cavity, which greatly promotes the uniform mixing of light before it reaches the dimming body by increasing the complexity and randomness of the light path, thus improving the color consistency of the emitted light from the source. A light-shielding layer is set on the outer surface of the outer shell, which effectively absorbs the weak stray light that penetrates the shell material, and completely eliminates the phenomena of halo, light leakage or uneven light emission on unintended non-light-emitting surfaces.

[0015] Optionally, the connector is made of a light-transmitting material or a light-diffusing material.

[0016] By adopting the above technical solution, when the connector is made of a light-transmitting material, it acts as a low-loss light guide, efficiently and directionally delivering the light emitted from the second cavity light source to the dimming body in the first cavity, minimizing the waste of light energy in the transmission path. When the connector is made of a light-homogenizing material, its function is further enhanced: it simultaneously begins the scattering and homogenization process of light during transmission, ensuring that the light has undergone "pre-homogenization" before reaching the dedicated light-homogenizing dimming body.

[0017] Optionally, the first opening of the outer shell is provided with a first limiting protrusion, the connecting body is located between the first limiting protrusion and the bottom wall of the receiving cavity, and the dimming body is connected to the first limiting protrusion.

[0018] By adopting the above technical solution, the first limiting protrusion and the bottom wall of the receiving cavity work together to form a robust axial positioning groove, stably constraining the connector and the dimming body in the preset installation position. This rigid fixation effectively prevents the optical components from shifting, loosening, or sinking during transportation, installation, or when subjected to vibration and impact.

[0019] Optionally, the first limiting protrusion of the outer shell is made of a light-transmitting material.

[0020] By adopting the above technical solution, when the first limiting protrusion is made of a light-transmitting material, it is optically integrated with the dimming body, which is the core light-emitting component, thus eliminating the obstruction, reflection, or absorption of light by different materials at the edge of the light outlet and avoiding the formation of shadows, dark areas, or visible hard boundaries in the light-emitting area by the positioning structure itself.

[0021] Optionally, the outer shell, connector, and dimming body are manufactured by continuous injection molding.

[0022] By adopting the above technical solution, the continuous injection molding process allows the outer shell, connector, and dimming body to be integrated into a seamless whole structure in a single molding process. This integrated structure completely eliminates the possibility of assembly gaps between components, thereby creating a completely sealed internal optical environment. This fundamentally prevents optical performance degradation or device failure caused by dust and moisture intruding from the interface, greatly improving the reliability and service life of the product.

[0023] Optionally, the outer shell, connector, and dimming body are formed from individual components and assembled together.

[0024] By adopting the above technical solutions, quality control and subsequent maintenance during the production process are greatly facilitated—any component with defects or damage can be replaced independently without scrapping the entire optical module. This not only improves the production yield but also reduces the maintenance cost throughout the entire life cycle.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] By placing the dimming element at and partially exposing it to the opening of the outer casing, the homogenized light is allowed to enter the environment directly or almost directly. This minimizes light loss and uniformity degradation caused by traditional protective covers, ensuring the lossless transmission of the dimming element's excellent light homogenization effect. Inside the dimming element, a light homogenizer and a light-transmitting element are directly connected to form an optical continuum, further avoiding light efficiency loss at the light-emitting interface and achieving an extremely uniform and bright light output effect. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application;

[0028] Figure 2 This is a schematic diagram of the overall structure of Embodiment 2 of this application;

[0029] Figure 3 This is a schematic diagram of the overall structure of Embodiment 3 of this application;

[0030] Figure 4 This is a schematic diagram of the overall structure of the second solution in Embodiment 5 of this application;

[0031] Figure 5 This is a schematic diagram of the overall structure of Embodiment 6 of this application.

[0032] Explanation of reference numerals in the attached drawings: 1. Outer shell; 11. First limiting protrusion; 12. Light-shielding layer; 13. Reflective layer; 14. First opening; 15. Accommodating cavity; 2. Connecting body; 21. First cavity; 211. First area; 212. Second area; 22. Second cavity; 23. Second limiting protrusion; 24. Third limiting protrusion; 3. Dimming body; 31. Light-uniforming body; 32. Light-transmitting body; 4. Light source body. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1 -Appendix Figure 5 This application will be described in further detail.

[0034] This application discloses a uniform light strip.

[0035] Example 1, referring to Figure 1A uniform light strip includes a housing 1. The housing 1 can be made of a rigid material, such as a long strip of aluminum or rigid plastic, or a flexible material, such as a long strip made of PVC / PC / silicone. The housing 1 has an internal cavity and a first opening 14 communicating with the cavity 15 on one side wall.

[0036] A connector 2 made of transparent PC material is provided inside the cavity. The connector 2 has a first cavity 21 that is directly connected to the first opening 14. A second cavity 22 is formed between the first cavity 21 and the bottom wall of the cavity. A light source 4 is provided in the second cavity 22. The light source 4 is a light strip with multiple RGB three-color LED chips attached.

[0037] A dimming element 3 is disposed inside the first cavity 21. The dimming element 3 is a strip-shaped PMMA diffuser plate. The dimming element 3 completely fills the first cavity 21, and its light-emitting surface is basically flush with the plane of the first opening 14, that is, at least part of it is located at the first opening.

[0038] The multi-colored light emitted by the light source 4 is initially mixed in the second cavity 22, and then the light passes through the transparent connector 2 into the first cavity 21, where it is fully diffused and homogenized by the dimming body 3, and finally emitted uniformly from the first opening.

[0039] Example 2, Reference Figure 2 This embodiment optimizes the dimming body 3 based on Embodiment 1: the dimming body 3 includes a light-transmitting body 32 and a light-uniforming body 31. The light-transmitting body 32 is a highly transparent PMMA light guide strip, which is in direct optical contact with the light source 4. The light-uniforming body 31 is a PS material containing diffusing particles, which is connected to the top surface of the light-transmitting body 32 by thermal fusion to form a whole. The first cavity 21 and the second cavity 22 are interconnected through through holes on the connector 2, and the LED chip of the light source 4 is in direct contact with the bottom surface of the light-transmitting body 32, achieving efficient light coupling.

[0040] Example 3, Reference Figure 3 Unlike Embodiment 2, the first cavity 21 and the second cavity 22 are completely separated, forming independent cavities. The outer surface of the outer shell 1 is coated with a black light-shielding layer 12, such as black paint. The inner walls of the cavities are coated with a highly reflective layer 13, such as a silver-plated PET film. The independent second cavity 22 can reduce heat transfer to the dimming body 3; the combination of the reflective layer 13 and the light-shielding layer 12 achieves efficient utilization of light energy and visually eliminates stray light leakage.

[0041] In Example 4, the connector 2 is made of a light-homogenizing material, which is a semi-transparent PC mixed with micron-sized barium sulfate diffusion particles. The rest of the structure is the same as in Example 2 or Example 3. While transmitting light, the connector 2 itself is "pre-homogenized", so that the light entering the dimming body 3 has good uniformity, thereby reducing the burden on the dimming body 3 and achieving more extreme light output uniformity.

[0042] In embodiment 5, the outer shell 1 has an inwardly protruding first limiting protrusion 11 integrally formed on the inner edge of the first opening 14. The connecting body 2 is tightly pressed between the first limiting protrusion 11 and the bottom wall of the receiving cavity. The top end of the dimming body 3 is in close contact with the inner surface of the first limiting protrusion 11.

[0043] refer to Figure 2 The first cavity 21 is divided into a first region 211 and a second region 212. The first region 211 is close to the top of the connector 2. A second limiting protrusion 23 is provided between the first region 211 and the second region 212. The light-transmitting body 32 and the light-diffusing body 31 are connected by heat fusion or adhesive. The second limiting protrusion 23 is located between the light-transmitting body 32 and the light-diffusing body 31, which can fix the connector 2 and the dimming body 3. A third limiting protrusion 24 is provided between the first cavity 21 and the second cavity 22. After the light source body 4 is placed in the second cavity 22, the material of the light-transmitting body 32 / light-diffusing body 31 is filled into the second region 212 by injection molding.

[0044] refer to Figure 4 The third limiting protrusion 24 is provided with an inclined surface. The design of the inclined surface enhances the flowability of the material during filling.

[0045] Example 6, Reference Figure 5 Based on Example 5, the first limiting protrusion 11 is made of a light-transmitting material, so that the light-emitting surface of the dimming body 34 extends directly to the edge of the light strip visually, achieving a "borderless" floating light-emitting effect without dark areas or shadows.

[0046] Example 7: In this example, the outer shell 1, connector 2, and dimming body 3 are manufactured by continuous injection molding. The specific process is as follows: first, the skeleton of the outer shell 1 and connector 2 is formed by injection molding; then, the light source 4 is implanted in the second cavity 22; finally, the dimming body 3 is combined with the outer shell 1 and connector 2 into a seamless whole through secondary injection molding.

[0047] In Example 8, the outer shell 1, connector 2, and dimming body 3 described in this example are all molded as individual components (e.g., manufactured separately by injection molding) and finally assembled. For example, the dimming body 3 can be fixed to the connector 2 by snap-fit ​​or adhesive, and then the entire optical module can be slid into the receiving cavity of the outer shell 1 from the side and fixed.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A uniform light strip, characterized in that: include The outer shell (1) is provided with a receiving cavity, and the outer shell (1) is provided with at least one first opening (14) communicating with the receiving cavity (15). Connector (2), the connector (2) is disposed in the receiving cavity (15), the connector (2) is provided with a first cavity (21) communicating with the first opening, and a second cavity (22) is provided between the first cavity (21) and the bottom wall of the receiving cavity (15). Light source body (4), the light source body (4) is disposed in the second cavity (22); A dimming body (3) is disposed in the first cavity (21) and located between the light source body (4) and the first opening; The dimming body (3) is located at least partially at the first opening (14).

2. The uniform light strip according to claim 1, characterized in that: The dimming body (3) includes a light-diffusing body (31) and a light-transmitting body (32), which are connected to each other.

3. The uniform light strip according to claim 2, characterized in that: The first cavity (21) and the second cavity (22) are connected, and the light source (4) is connected to the dimming body (3).

4. The uniform light strip according to claim 2, characterized in that: The first cavity (21) and the second cavity (22) are independent cavities.

5. The uniform light strip according to any one of claims 3 or 4, characterized in that: The outer surface of the outer shell (1) is provided with a light-shielding layer (12), and the inner wall of the cavity is provided with a reflective layer (13).

6. The uniform light strip according to claim 5, characterized in that: The connector (2) is made of a light-transmitting material or a light-diffusing material.

7. The uniform light strip according to claim 6, characterized in that: The outer shell (1) has a first limiting protrusion (11) at the first opening (14), the connecting body (2) is located between the first limiting protrusion (11) and the bottom wall of the accommodating cavity (15), and the dimming body (3) is connected to the first limiting protrusion (11).

8. The uniform light strip according to claim 7, characterized in that: The first limiting protrusion (11) of the outer shell (1) is made of a light-transmitting material.

9. The uniform light strip according to claim 7, characterized in that: The outer shell (1), connector (2), and dimming body (3) are made by continuous injection molding.

10. The uniform light strip according to claim 7, characterized in that: The outer shell (1), connector (2), and dimming body (3) are formed from individual components and assembled together.

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