Automobile lamp diffuse reflection optical structure

Abstract

The invention relates to the field of car lamps, and discloses a car lamp diffuse reflection optical structure which comprises a light source, a light guide plate, a light guide plate and a light guide plate. The light guide structure is mounted in the automobile lamp shell, is arranged on a light emitting path of the light source and is used for receiving light of the light source and changing the propagation direction of the light; the diffuse reflection structure is installed in the automobile lamp shell and used for receiving the light processed by the light guiding structure, the light is scattered multiple times through surface textures, and diffuse reflection light spots evenly scattered to the visual face are formed. According to the invention, through the multi-stage scattering design of the thick-wall condenser, the dodging sheet and the frosted reflector, the light forms a uniform diffuse reflection effect without obvious light spots and dark areas on a visual surface, no granular sensation is generated when the light is lightened, the light is uniformly diffused according to the diffuse reflection principle, the direct strong light caused by the traditional mirror reflection is avoided, and the brightness of the light source is improved. And glare interference to drivers of vehicles and pedestrians is reduced.

Description

Technical Field

[0001] The present invention relates to the field of vehicle lamps, and in particular to a diffuse reflection optical structure of a vehicle lamp. Background Art

[0002] In lighting systems such as vehicle position lights, the industry generally adopts a diffuse reflection optical solution combining thick-walled light guides and reflectors. LED light panels or halogen light sources provide the initial light. A thick-walled concentrator receives the light from the source, utilizing internal total reflection and the optical pattern on the front end for primary scattering. A smooth or lightly textured reflector receives the light emitted by the light guide structure and directs it toward the visible surface through specular reflection. This solution relies on the scattering ability of the thick-walled pattern and the light distribution accuracy of the reflector.

[0003] A search revealed that the publication number CN219955117U discloses an ultra-narrow LED dual-light lens module, comprising a reflector, an LED module, and a heat sink. The reflector is disposed on the heat sink, and an LED module is disposed in a cavity covered by the reflector. The LED module comprises a high-beam module and a low-beam module, and a high-beam module. The high-beam module and the low-beam module are spaced apart from each other in a front-to-back arrangement, and the reflective surface of the reflector cooperates with the high-beam module to guide light, which is then emitted through a lens.

[0004] The existing diffuse reflection optical structure of headlights lacks uniformity in light distribution. When light passes through the thick-walled concentrator and directly hits the reflector, the limited scattering ability of the front-end optical pattern forms local light spots and dark areas. In addition, the mirror reflection produces highly directional glare, threatening the vision of drivers of oncoming vehicles. Summary of the Invention

[0005] In order to solve the above-mentioned problems, the present invention is implemented through the following technical solutions.

[0006] A diffuse reflection optical structure for a vehicle lamp, comprising:

[0007] A light source, installed in the lamp housing, for providing light output;

[0008] The light guide structure is installed in the lamp housing and is set on the light output path of the light source to receive the light from the light source and change its propagation direction;

[0009] The diffuse reflection structure is installed in the headlight housing, receives the light processed by the light guiding structure, and scatters the light multiple times through the surface texture, forming a diffuse reflection light spot that is evenly diverged to the visible surface.

[0010] Preferably, the light guiding structure is a thick-walled concentrator, the front end of which is provided with an optical pattern for scattering light in the direction of the reflector;

[0011] The diffuse reflection structure is a reflector, and the reflective surface of the reflector is treated with frosted leather grain to form a fine texture on the surface for destroying the mirror reflection.

[0012] Preferably, the light guiding structure is a reflector 1, whose reflective surface is provided with a special pattern for guiding the light to the light homogenizer;

[0013] The diffuse reflection structure includes a light homogenizer and a second reflector;

[0014] The reflective surface of the second reflector is treated with frosted leather grain, and a fine texture is formed on the surface to destroy the mirror reflection;

[0015] The light homogenizer receives the light from the first reflector and performs multiple internal scattering, and then transmits the light to the surface of the second reflector for further uniform reflection.

[0016] Preferably, the reflective surface after the frosted leather grain treatment is a discontinuous concave-convex structure, so that the reflected light forms a Lambertian scattering characteristic.

[0017] Preferably, the light source is an LED light panel for providing light.

[0018] Preferably, the light homogenizer is made of a highly scattering material and disrupts the light path through internal refraction.

[0019] Preferably, the optical pattern of the thick-walled concentrator is arranged in a dot matrix or array, so that the light from the light source is dispersed in the horizontal and vertical directions and projected onto the reflector.

[0020] Preferably, the optical pattern density at the front end of the thick-walled concentrator is 5-15 per cm 2 .

[0021] Preferably, the frosted leather grain surface haze of the second reflector is ≥90%, so that the diffusion angle of the reflected light is ≥160°.

[0022] Preferably, the included angle between the first reflector and the light homogenizer is 35-45°, and the included angle between the second reflector and the light homogenizer is 40-45°.

[0023] The present invention provides a diffuse reflection optical structure for vehicle lights. Compared with existing technologies, it has the following advantages: Through a multi-stage scattering design using a thick-walled concentrator, a light-homogenizing plate, and a frosted reflector, light forms a uniform diffuse reflection effect on the visible surface without noticeable light spots or dark areas, resulting in a grainless appearance when lit. The diffuse reflection principle evenly disperses light, avoiding the strong direct light caused by traditional mirror reflection and reducing glare for oncoming vehicle drivers and pedestrians. The optical pattern of the thick-walled concentrator and the angle design of the reflector reduce light overflow loss and concentrate light energy toward the visible surface. The frosted leather-grained surface of reflector 2 has a haze of ≥90%, resulting in a reflected light diffusion angle of ≥160°, covering a wider visual range and meeting the wide-angle visibility requirements of vehicle position lights. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1This is a structural diagram of the first embodiment of the present invention.

[0025] Figure 2 This is a structural diagram of the second embodiment of the present invention.

[0026] The reference numerals in the figures are:

[0027] 100. Headlight housing;

[0028] 200, light source;

[0029] 300, light guiding structure;

[0030] 400, diffuse reflection structure; 401, light homogenizer; 402, reflector 2. DETAILED DESCRIPTION

[0031] The present invention is further described below with reference to specific examples. It should be understood that these examples are only used to illustrate the present invention and are not used to limit the scope of protection of the present invention.

[0032] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention.

[0033] Example 1: Reference Figure 1 , a diffuse reflection optical structure of a vehicle lamp, comprising:

[0034] The light source 200 is installed in the vehicle lamp housing 100 and is used to provide light output;

[0035] The light guide structure 300 is installed in the vehicle lamp housing 100 and is arranged on the light output path of the light source 200 to receive the light from the light source 200 and change its propagation direction;

[0036] The diffuse reflection structure 400 is installed in the vehicle lamp housing 100, receives the light processed by the light guide structure 300, and scatters the light multiple times through the surface texture to form a diffuse reflection light spot that is evenly dispersed to the visible surface.

[0037] This embodiment forcibly deflects the direct light from the LED toward the reflector, preventing the light from directly hitting the visible surface and causing glare, breaking through the lateral diffusion angle limitation of traditional thick-walled light guides.

[0038] The matte texture converts specular reflection into Lambertian reflection, solving the problem of light spots / dark areas and eliminating the graininess and light distribution patterns that are recognizable to the human eye.

[0039] The light guiding structure 300 is a thick-walled concentrator, and its front end is provided with an optical pattern that scatters light toward the reflector; the diffuse reflection structure 400 is a reflector, and its reflective surface is treated with frosted leather grain to form a fine texture on the surface for destroying the mirror reflection.

[0040] As the core executive component of diffuse reflection, the reflector destroys the mirror reflection through the discontinuous concave and convex texture on the surface, realizing secondary scattering of light. The fine texture formed by the frosted leather treatment is the key to producing the Lambertian scattering characteristics. After reflection, the light is evenly diverged to the visible surface, eliminating obvious light spots or dark areas, and the lighting effect has no graininess. The non-specular reflection reduces glare and improves the safety of oncoming vehicles and pedestrians.

[0041] The reflective surface after the frosted leather grain treatment is a discontinuous concave-convex structure, so that the reflected light forms a Lambertian scattering characteristic.

[0042] The light source 200 is an LED light panel, which is used to provide light, and provides high-intensity stable light.

[0043] The optical pattern of the thick-walled concentrator is arranged in a dot matrix or array, so that the light from the light source 200 is dispersed in the horizontal and vertical directions and projected onto the reflector.

[0044] Through the design of concentrators and special reflective surfaces, the direction of light propagation is changed, and preliminary scattering is achieved through the front-end optical pattern. Its thick-walled structure provides a path basis for the refraction and reflection of light inside. The optical pattern disperses the light horizontally and vertically toward the reflector, avoiding the concentration of light spots caused by direct radiation; the thick-walled material constrains the light, reducing light energy loss and improving light efficiency utilization.

[0045] The optical pattern density at the front end of the thick-walled concentrator is 5-15 per cm 2 .

[0046] The light source 200 emits high-intensity parallel or divergent light as the initial energy input of the entire optical system. The light enters the thick-walled concentrator, and the special reflective surface inside the concentrator first changes the direction of the light, confining the light to a specific propagation path. The dot matrix / array optical pattern at the front end of the thick wall scatters the light for the first time. When the light hits the pattern surface, it is refracted and reflected due to the concave and convex structure of the pattern, causing the originally concentrated light to be dispersed toward the reflector, forming a preliminary diffused light cone. The light scattered by the thick wall reaches the reflector surface, and the frosted leather-grained surface of the reflector plays a key role. The light undergoes non-specular reflection on the concave and convex texture surface, and each tiny convex point is equivalent to an independent scattering unit, reflecting the light evenly in all directions; finally, the light is evenly diverged to the visible surface, forming a diffuse reflection effect without obvious light spots or dark areas, meeting the lighting needs of the car.

[0047] Example 2: Reference Figure 2The difference between this embodiment and the first embodiment is that the light guiding structure 300 is a reflector 1, whose reflective surface is provided with a special pattern for guiding light to the light homogenizer 401; the diffuse reflection structure 400 includes a light homogenizer 401 and a reflector 2 402; the reflective surface of the reflector 2 402 is treated with frosted leather grain, and a fine texture is formed on the surface for destroying the mirror reflection. The reflective surface after the frosted leather grain treatment is a discontinuous concave-convex structure, so that the reflected light forms a Lambertian scattering characteristic; the light homogenizer 401 receives the light from the reflector 1 and performs multiple internal scattering, and then transmits it to the surface of the reflector 2 402 for further uniform reflection.

[0048] The light homogenizer 401 is made of a highly scattering material and disrupts the light path through internal refraction.

[0049] The frosted leather-grained surface haze of the second reflector 402 is ≥90%, so that the diffusion angle of the reflected light is ≥160°.

[0050] The included angle between the first reflector and the light homogenizer 401 is 35-45 degrees, and the included angle between the second reflector 402 and the light homogenizer 401 is 40-45 degrees.

[0051] The reflector reflects light and directs it toward the diffuser 401 through a special pattern on its surface, achieving initial scattering control. The pattern design determines the angle and distribution of light entering the diffuser 401. The special pattern reflects light in a predetermined direction, laying the foundation for subsequent multiple scattering by the diffuser 401; it also provides initial dispersion of light, reducing the scattering load on the diffuser 401.

[0052] The diffuser 401, made of a highly scattering material, disrupts the light path through internal refraction and scattering. It is the core diffuser component of Option 2. Positioned between the first and second reflectors 402, it forms a dual diffuser-reflector diffuser mechanism. This internal scattering of light thoroughly disrupts its propagation direction, resulting in a more uniform light distribution. Combined with the second reflector 402, this creates a visually invisible light pattern, enhancing the aesthetics of the headlight design.

[0053] The second reflector 402 performs secondary diffuse reflection on the light output by the light homogenizer 401 to further homogenize the light spot.

[0054] Light source 200 emits light, which directly illuminates the surface of reflector 1. The special pattern on the surface of reflector 1 reflects the light at a preset angle in the direction of light homogenizer 401, achieving preliminary light guidance and dispersion. The light reflected by reflector 1 enters light homogenizer 401. Inside light homogenizer 401, the light encounters scattering particles or microstructures in the material, undergoing multiple refractions and scattering, and the propagation direction is completely disrupted. The light that originally had a certain directionality becomes scattered light evenly distributed in all directions, providing uniform light input for the subsequent secondary diffuse reflection of reflector 2 402. The uniformly scattered light is emitted from light homogenizer 401 and illuminates the surface of reflector 2 402. The discontinuous concave-convex structure of its frosted surface causes the light to undergo secondary diffuse reflection, and finally diverges evenly to the visible surface, forming a diffuse reflection light spot without visible patterns.

[0055] In summary, compared with the existing technology, it has the following beneficial effects:

[0056] Through the multi-level scattering design of thick-walled concentrator, uniform light sheet 401 and frosted reflector, light forms a uniform diffuse reflection effect on the visible surface without obvious light spots or dark areas, and there is no graininess when lit. The diffuse reflection principle makes the light diverge evenly, avoiding the direct strong light caused by traditional mirror reflection, and reducing glare interference to oncoming vehicle drivers and pedestrians.

[0057] The optical pattern of the thick-walled concentrator and the angle design of the reflector reduce light overflow loss and concentrate light energy on the visible surface. The frosted leather surface haze of the reflector 2402 is ≥90%, making the reflected light diffusion angle ≥160°, covering a wider visual range and meeting the wide-angle visibility requirements of vehicle position lights.

[0058] Thus, although the invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are contemplated within the foregoing disclosure, and it should be understood that in some cases, some features of the invention will be employed without the corresponding use of other features without departing from the scope and spirit of the claimed invention. Thus, many modifications may be made to adapt a particular environment or material to the true scope and spirit of the invention. The invention is not intended to be limited to the specific terminology used in the claims below and / or to the specific embodiments disclosed as the best mode contemplated for carrying out the invention, but the invention is intended to include any and all embodiments and equivalents falling within the scope of the appended claims. Thus, the scope of the invention will be determined solely by the appended claims.

Claims

1. A diffuse reflection optical structure of a vehicle lamp, characterized in that: include: A light source (200) is installed in the vehicle lamp housing (100) and is used to provide light output; A light guide structure (300) is installed in the vehicle lamp housing (100) and is arranged on the light output path of the light source (200), and is used to receive light from the light source (200) and change its propagation direction; The diffuse reflection structure (400) is installed in the vehicle lamp housing (100), receives the light processed by the light guide structure (300), and scatters the light multiple times through the surface texture to form a diffuse reflection light spot that is evenly distributed to the visible surface.

2. The diffuse reflection optical structure of the vehicle lamp according to claim 1, characterized in that: The light guiding structure (300) is a thick-walled concentrator, the front end of which is provided with an optical pattern for scattering light toward the reflector; The diffuse reflection structure (400) is a reflector, and its reflective surface is treated with frosted leather grain, forming a fine texture on the surface for destroying the mirror reflection.

3. The diffuse reflection optical structure of the vehicle lamp according to claim 1, characterized in that: The light guiding structure (300) is a reflector 1, whose reflective surface is provided with a special pattern for guiding light to the light homogenizing sheet (401); The diffuse reflection structure (400) includes a light homogenizer (401) and a second reflector (402); The reflecting surface of the second reflecting mirror (402) is subjected to frosted leather grain treatment, and a fine texture is formed on the surface for destroying the mirror reflection; The light homogenizer (401) receives the light from the first reflector and performs multiple internal scattering, and then transmits the light to the surface of the second reflector (402) for further uniform reflection.

4. The diffuse reflection optical structure of a vehicle lamp according to claim 2 or 3, characterized in that: The reflective surface after the frosted leather grain treatment is a discontinuous concave-convex structure, so that the reflected light forms a Lambertian scattering characteristic.

5. The diffuse reflection optical structure of the vehicle lamp according to claim 1, characterized in that: The light source (200) is an LED light panel, used for providing light.

6. The diffuse reflection optical structure of the vehicle lamp according to claim 3, characterized in that: The light homogenizer (401) is made of a highly scattering material and disrupts the light path through internal refraction.

7. The diffuse reflection optical structure of a vehicle lamp according to claim 2, characterized in that: The optical pattern of the thick-walled concentrator is arranged in a dot matrix or array format, so that the light from the light source (200) is dispersed and projected onto the reflector in the horizontal and vertical directions.

8. The diffuse reflection optical structure of the vehicle lamp according to claim 7, characterized in that: The optical pattern density at the front end of the thick-walled concentrator is 5-15 per cm 2 .

9. The diffuse reflection optical structure of a vehicle lamp according to claim 3, characterized in that: The frosted leather grain surface haze of the second reflector (402) is ≥90%, so that the diffusion angle of the reflected light is ≥160°.

10. The diffuse reflection optical structure of a vehicle lamp according to claim 3, characterized in that: The included angle between the first reflector and the light homogenizing plate (401) is 35-45 degrees, and the included angle between the second reflector (402) and the light homogenizing plate (401) is 40-45 degrees.

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