Area light source device
Through multiple reflections and refractions of light guide structural parts and trim designs, the luminescence range of the LED light source is expanded, the problems of light energy waste and local highlights in the prior art are solved, and a larger luminous area and higher light efficiency and visual uniformity are achieved.
Patent Information
- Application Number
- CN202422614803.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-10-29
AI Technical Summary
When pursuing a large luminous area, existing surface light source devices usually require multiple LED light sources to stack or sacrifice structural space, resulting in waste of light energy and local highlights, affecting visual uniformity.
The light guide structure and decorative panel design are adopted, and the light emitting range of the LED light source is expanded through multiple reflections and refractions, and the light ray uniformization is achieved through the concentrator structure and the combined structure of the total reflection.
It realizes a larger luminous area with a small number of LED light sources, improves the light efficiency and visual uniformity of the car light, and saves light energy and costs.
Smart Images
Figure CN223191472U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicle lamp production, in particular to a surface light source device. Background Art
[0002] A surface light source, particularly within a headlight, refers to a surface or combination of surfaces that, through optical design, creates a uniform, clustered, area-based lighting effect. A surface light source device comprises at least a light source device and a light-guiding structure. Compared to point or line light sources, the illuminated area boasts a larger luminous surface area than either type. This allows for a higher level of expression and enriches the design of the headlight.
[0003] However, existing surface light sources and their devices achieve a uniform, large luminous area by either stacking a large number of LEDs or sacrificing a significant amount of internal space within the lamp. This approach compromises light efficiency, wastes energy, and goes against the principles of energy conservation and environmental protection. These solutions also have drawbacks. Due to structural space constraints, the light source components cannot often be completely concealed, resulting in unexpected localized bright spots when viewed from certain angles, reducing overall lighting uniformity and impacting visual perception. Utility Model Content
[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide a surface light source device, which can achieve a larger luminous area with a small number of light sources, and finally reach the expected luminous surface through multiple reflections or refractions of light, effectively avoiding the visible lighting defects of LED bright spots and improving the overall uniformity of the car lights.
[0005] In order to solve the above technical problems, the technical solution of the utility model is:
[0006] A surface light source device includes at least one LED light source, a light guide structure, and a decorative plate located between the LED light source and the light guide structure;
[0007] The light guide structure includes at least one concentrator structure corresponding to the LED light source, at least one total reflection combination structure corresponding to the concentrator structure, and a light emitting surface structure connected to the total reflection combination structure;
[0008] The total reflection combination structure includes a first reflection surface, a second reflection surface and a third reflection surface that are distributed at an angle to each other, a fourth reflection surface that is arranged at an angle opposite to the second reflection surface, and a fifth reflection surface that is arranged at an angle opposite to the third reflection surface;
[0009] The light emitted by the LED light source is collimated by the concentrator structure and enters the light-guiding structure. Part of the light is reflected by the first reflection surface to the light-emitting surface structure for emission, another part of the light is reflected by the second reflection surface to the fourth reflection surface and then reflected to the light-emitting surface structure for emission, and another part of the light is reflected by the third reflection surface to the fifth reflection surface and then reflected to the light-emitting surface structure for emission.
[0010] Furthermore, the first reflecting surface, the second reflecting surface and the third reflecting surface are located in the collimating direction of the concentrator structure.
[0011] Furthermore, the light emitting surface structure includes a first light emitting surface and a second light emitting surface that are parallel to each other, and the decorative plate is close to the second light emitting surface and parallel to the second light emitting surface;
[0012] The light reflected by the first reflecting surface, the fourth reflecting surface and the fifth reflecting surface is first emitted onto the first light emitting surface, and then cyclically reflected between the first light emitting surface and the second light emitting surface to illuminate the light emitting surface structure.
[0013] Furthermore, the projection areas of the fourth reflecting surface and the fifth reflecting surface in the normal direction of the first light-emitting surface are larger than the projection area of the first reflecting surface in the normal direction of the first light-emitting surface.
[0014] Furthermore, the angle range between the main emission direction of the LED light source and the first reflection surface is 30 degrees to 80 degrees, the angle range between the main emission direction of the LED light source and the second reflection surface is 30 degrees to 80 degrees, the angle range between the main emission direction of the LED light source and the third reflection surface is 30 degrees to 80 degrees, and the angle range between the first reflection surface and the first light-emitting surface is 20 degrees to 80 degrees.
[0015] Furthermore, the first light-emitting surface and the second light-emitting surface both include a smooth surface and at least one patterned surface.
[0016] Furthermore, the patterned surface of the first light-emitting surface has a first pattern structure, and the patterned surface of the second light-emitting surface has a second pattern structure. Light entering the light-emitting surface structure is refracted and totally reflected when reaching the first pattern structure and the second pattern structure.
[0017] Furthermore, the first pattern structure and the second pattern structure are columnar structure arrays, prism structure arrays, or spherical structure arrays.
[0018] By adopting the above technical solution, the utility model has the following beneficial effects:
[0019] 1. The utility model is located between the light guide element and the LED light source through the decorative plate design, which not only has the function of blocking the bright spot of the LED light source, but also can make the light emitted from the luminous surface near one end of the decorative plate diffusely reflect again to make the light uniform.
[0020] 2. The light-guiding structure of this utility model combines a concentrator structure, a total reflection combined structure, and a light-emitting surface structure. The concentrator structure collects light from the LED light source and converges it into parallel light, which then enters the light-guiding structure. This improves the luminous efficiency and utilization rate of the surface light source, making the vehicle lamp more energy-efficient and environmentally friendly. The total reflection combined structure, through the combination of the first, second, third, fourth, and fifth reflective surfaces, directs light from the light source to the light-emitting surface structure, maximizing the lateral lighting range of a single LED light source, improving the utilization rate of light output, ensuring the uniformity of the light-emitting surface, and achieving a larger luminous area with fewer LED light sources, saving light energy and costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;
[0022] Figure 2 This is a schematic structural diagram of the light guide structure of the utility model;
[0023] Figure 3 This is a schematic diagram of the optical path principle of the utility model;
[0024] Among them, 1. LED light source; 2. Light-guiding structure; 21. Concentrator structure; 22. Total reflection combination structure; 221. First reflection surface; 222. Second reflection surface; 223. Third reflection surface; 224. Fourth reflection surface; 225. Fifth reflection surface; 23. Light-emitting surface structure; 231. First light-emitting surface; 232. Second light-emitting surface; 233. First pattern structure; 234. Second pattern structure. DETAILED DESCRIPTION
[0025] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments in conjunction with the accompanying drawings.
[0026] like Figure 1-3 As shown, in this embodiment, a surface light source device is provided, which is mainly composed of three LED light sources 1, a light guide structure 2, and a decorative plate 3 located between the LED light sources 1 and the light guide structure 2. The light guide structure 2 includes three concentrator structures 21, three total reflection combination structures 22, and a light output surface structure 23 connected to the total reflection combination structures 22. The three LED light sources 1 correspond to the three concentrator structures 21, and the three concentrator structures 21 are connected to the three total reflection combination structures 22.
[0027] Specifically, the total reflection combination structure 22 includes a first reflection surface 221, a second reflection surface 222, and a third reflection surface 223, which are arranged at an angle to each other, as well as a fourth reflection surface 224 arranged at an angle opposite to the second reflection surface 222, and a fifth reflection surface 225 arranged at an angle opposite to the third reflection surface 223. Furthermore, the first reflection surface 221, the second reflection surface 222, and the third reflection surface 223 are all located in the collimation direction of the concentrator structure 21. When the LED light source 1 emits light, the light is collimated by the concentrator structure 21 and enters the light-guiding structure 2. The concentrator structure 21 collimates the light into parallel light and roughly divides the light into three parts. The first part of the light is reflected by the first reflection surface 221 to the light-emitting surface structure 23 for output. The second part of the light is reflected by the second reflection surface 222 to the fourth reflection surface 224 and then to the light-emitting surface structure 23 for output. The third part of the light is reflected by the third reflection surface 223 to the fifth reflection surface 225 and then to the light-emitting surface structure 23 for output. In this way, the horizontal lighting range of a single LED light source 1 on the light emitting surface structure 23 can be expanded.
[0028] Specifically, the light-emitting surface structure 23 in this embodiment has a first light-emitting surface 231 and a second light-emitting surface 232 that are parallel to each other, and the decorative plate 3 is close to and parallel to the second light-emitting surface 232. The light reflected by the first reflective surface 221, the fourth reflective surface 224, and the fifth reflective surface 225 first strikes the first light-emitting surface 231, and then cyclically reflects between the first light-emitting surface 231 and the second light-emitting surface 232 to illuminate the light-emitting surface structure 23.
[0029] refer to Figure 1 As shown, the decorative panel 3 is located between the LED light source 1 and the light-guiding structure 2. The main emission direction of the LED light source 1 forms an angle α with the first reflection surface 221, the second reflection surface 222, and the third reflection surface 223 respectively. The first reflection surface 221 forms a certain angle β with the first light-emitting surface 231. The angle range of α is 30 degrees to 80 degrees, and the angle range of β is 20 degrees to 80 degrees.
[0030] refer to Figure 2 As shown, when the three portions of light reach the light-emitting surface, the lateral areas can be divided into region a dominated by the first reflective surface 221; region b dominated by the second reflective surface 222 and the fourth reflective surface 224; and region c dominated by the third reflective surface 223 and the fifth reflective surface 225. Furthermore, the projected areas of the fourth reflective surface 224 and the fifth reflective surface 225 in the normal direction of the first light-emitting surface 231 are larger than the projected area of the first reflective surface 221 in the normal direction of the first light-emitting surface 231. Therefore, a wider reflection range can be achieved in the lateral direction of the light-emitting surface.
[0031] refer to Figure 1-3As shown, the parallel light collimated by the concentrator structure 21 is divided into three parts. The first part of the light is reflected by the first reflective surface 221 and enters the first light-emitting surface 231. The second part of the light is reflected by the second reflective surface 222 and reaches the fourth reflective surface 224, and then reflects by the fourth reflective surface 224 and enters the first light-emitting surface 231. The third part of the light is reflected by the third reflective surface 223 and reaches the fifth reflective surface 225, and then reflects by the fifth reflective surface 225 and enters the first light-emitting surface 231. After entering the light-emitting surface structure 23, the above light is cyclically reflected between the first light-emitting surface 231 and the second light-emitting surface 232, so that the longitudinal direction of the light-emitting surface structure 23 is completely illuminated.
[0032] refer to Figure 3 As shown, in this embodiment, the first light-emitting surface 231 and the second light-emitting surface 232 both have smooth surfaces and patterned surfaces. The first light-emitting surface 231 and the second light-emitting surface 232 can be in various forms, such as a flat surface or an arbitrary curved surface. The patterned surface of the first light-emitting surface 231 has a rectangular first patterned structure 233, which is away from the decorative plate 3 and toward the outside of the surface light source device. The patterned surface of the second light-emitting surface 232 has a rectangular second patterned structure 234, which is toward the decorative plate 3. Light entering the light-emitting surface structure 23 can be refracted and totally reflected when reaching the first patterned structure 233 and the second patterned structure 234. Specifically, the first patterned structure 233 and the second patterned structure 234 can be a columnar structure array, a prismatic structure array, or a spherical structure array.
[0033] Through the above design, it can be seen that the light emitted by the LED light source 1 of this embodiment passes through the concentrator structure 21 and enters the light guide structure 2. The concentrator structure 21 collimates the light into parallel light. This parallel light is mainly divided into three parts: the first part of the light is reflected by the first reflective surface 221 and enters the first light-emitting surface 231; the second part of the light is reflected by the second reflective surface 222 and reaches the fourth reflective surface 224, and then reflects from the fourth reflective surface 224 before entering the first light-emitting surface 231; the third part of the light is reflected by the third reflective surface 223 and reaches the fifth reflective surface 225, and then reflects from the fifth reflective surface 225 before entering the first light-emitting surface 231. The three reflective surfaces perform total reflection from different angles, and the illuminated areas include a, b, and c, expanding the lateral illumination range of a single LED light source 1. After entering the light-emitting surface structure 23, all of the above light is cyclically reflected between the first light-emitting surface 231 and the second light-emitting surface 232, completely illuminating the longitudinal direction of the light-emitting surface structure, achieving the effect of illuminating a large area of the single LED light source 1. When light entering the light-emitting surface structure 23 reaches the first pattern structure 233 or the second pattern structure 234, it is refracted and totally reflected. The lighting effect of the matrix pattern structure is different from that of the smooth surface, so the lighting effect is diverse. At the same time, the first pattern structure 233 is located on the first pattern surface 231, and the second pattern structure 234 is located on the second light-emitting surface 232. The depth between the two light-emitting surfaces is determined by the material thickness of the light-emitting surface structure 23, which creates a more spatial sense of layering after lighting. The decorative plate 3 is located between the light-guiding element and the LED light source. It not only blocks the bright spot of the LED light source 1, but also diffusely reflects the light emitted from the second light-emitting surface 232 near one end of the decorative plate 3, making the light uniform.
[0034] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
[0035] The above specific embodiments further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A surface light source device, characterized in that: Comprising at least one LED light source (1), a light guide structure (2), and a decorative plate (3) located between the LED light source (1) and the light guide structure (2); The light-guiding structural component (2) comprises at least one concentrator structure (21) corresponding to the LED light source (1), at least one total reflection combination structure (22) corresponding to the concentrator structure (21), and a light-emitting surface structure (23) connected to the total reflection combination structure (22); The total reflection combination structure (22) comprises a first reflection surface (221), a second reflection surface (222), and a third reflection surface (223) that are distributed at an angle to each other, a fourth reflection surface (224) that is arranged at an angle relative to the second reflection surface (222), and a fifth reflection surface (225) that is arranged at an angle relative to the third reflection surface (223); Light emitted by the LED light source (1) is collimated by the concentrator structure (21) and enters the light-guiding structural component (2). A portion of the light is reflected by the first reflection surface (221) to the light-emitting surface structure (23) for emission, another portion of the light is reflected by the second reflection surface (222) to the fourth reflection surface (224) and then reflected to the light-emitting surface structure (23) for emission, and another portion of the light is reflected by the third reflection surface (223) to the fifth reflection surface (225) and then reflected to the light-emitting surface structure (23) for emission.
2. The surface light source device according to claim 1, wherein: The first reflecting surface (221), the second reflecting surface (222) and the third reflecting surface (223) are located in the collimation direction of the concentrator structure (21).
3. The surface light source device according to claim 1, wherein: The light-emitting surface structure (23) comprises a first light-emitting surface (231) and a second light-emitting surface (232) that are parallel to each other, and the decorative plate (3) is close to the second light-emitting surface (232) and parallel to the second light-emitting surface (232); The light reflected by the first reflection surface (221), the fourth reflection surface (224) and the fifth reflection surface (225) is first incident on the first light-emitting surface (231), and then cyclically reflected between the first light-emitting surface (231) and the second light-emitting surface (232) to illuminate the light-emitting surface structure (23).
4. The surface light source device according to claim 3, wherein: The projection areas of the fourth reflection surface (224) and the fifth reflection surface (225) in the normal direction of the first light-emitting surface (231) are greater than the projection area of the first reflection surface (221) in the normal direction of the first light-emitting surface (231).
5. The surface light source device according to claim 1, wherein: The angle range between the main emission direction of the LED light source (1) and the first reflection surface (221) is 30 degrees to 80 degrees, the angle range between the main emission direction of the LED light source (1) and the second reflection surface (222) is 30 degrees to 80 degrees, the angle range between the main emission direction of the LED light source (1) and the third reflection surface (223) is 30 degrees to 80 degrees, and the angle range between the first reflection surface (221) and the first light-emitting surface (231) is 20 degrees to 80 degrees.
6. The surface light source device according to claim 3, characterized in that: The first light-emitting surface (231) and the second light-emitting surface (232) both comprise a smooth surface and at least one patterned surface.
7. The surface light source device according to claim 6, characterized in that: The patterned surface of the first light-emitting surface (231) has a first patterned structure (233), and the patterned surface of the second light-emitting surface (232) has a second patterned structure (234). Light entering the light-emitting surface structure (23) is refracted and totally reflected when reaching the first patterned structure (233) and the second patterned structure (234).
8. The surface light source device according to claim 7, characterized in that: The first pattern structure (233) and the second pattern structure (234) are columnar structure arrays, prism structure arrays, or spherical structure arrays.