Automobile RGB atmosphere lamp
By employing a cross-arranged light guide and light shield design, combined with meticulous control measures, the problem of uneven brightness in automotive RGB ambient lighting has been solved, achieving a brighter and more uniform ambient lighting effect.
Patent Information
- Application Number
- CN202511938535.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-22
- Publication Date
- 2026-02-06
AI Technical Summary
The existing production of cross-beams for automotive RGB ambient lighting suffers from uneven brightness, particularly bright spots and light leakage, making it difficult to meet customers' requirements for uniform brightness.
The first and second light guides are arranged in a cross pattern, with the first LED light source head and the second LED light source head respectively. A light shield is installed on the outside of the cross section. Combined with the precise control of the light guide gate, parting line, mold splicing line and clamping feet, the light is ensured to be evenly distributed.
The ambient light design achieves higher brightness values, significantly improving brightness uniformity, avoiding bright spots and light leakage, and meeting the customer's requirements for brightness uniformity.
Smart Images
Figure CN121474522A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of automobile lamps, in particular to an automobile RGB atmosphere lamp. BACKGROUND
[0002] In the prior art, atmosphere lamps have been rapidly popularized in recent years and have become a basic configuration of automobiles. LED light sources are also used to achieve several to several hundred different colors by using color-rich RGB LEDs, and the color and brightness can be adjusted according to the surrounding environment, temperature, safety and other factors. The light-emitting form of the atmosphere lamp is also very rich, and generally includes a direct type strip atmosphere lamp with a LED light source, a long light guide and a scattering material panel, a transmission type atmosphere lamp with a LED light source, a light guide plate and a patterned panel, a reflection type point light source atmosphere lamp with a LED light source, a scattering material panel and a light-emitting evaluation area being a non-panel light-emitting surface area of other irradiation surfaces, a reflection type strip atmosphere lamp with a LED light source, a long light guide and a scattering material panel and a light-emitting evaluation area being a non-panel light-emitting surface area of other irradiation surfaces, a reflection type strip atmosphere lamp with a LED light source, a long light guide and a light-emitting evaluation area being a non-light guide light-emitting surface area of other irradiation surfaces, and the like.
[0003] At present, the most commonly used form of atmosphere lamp is a strip atmosphere lamp. With the popularity of through lamps, the strip atmosphere lamp also pursues a through effect. However, due to the influence of the vehicle body space on the arrangement of the lamp head and the requirements of the RGB mixed light distance, the lamp head is arranged in the middle position of the atmosphere lamp light-emitting area by the vehicle lamp manufacturers, and is mostly made into a one-to-two light guide, two L-shaped light guides without intersection or two intersecting light guides. The one-to-two light guide only arranges one LED light source lamp head, and the light guide cannot be made too long, so it is not suitable for atmosphere lamps with a length of more than one meter. Having only one lamp head means that the brightness value is limited and cannot be improved. In addition, the one-to-two light guide has light leakage at the bifurcation, which seriously affects the brightness uniformity of the atmosphere lamp. The two L-shaped light guides without intersection mean that the RGB mixed light area of the light guide light inlet end needs to extend to the inside of the vehicle body. However, in actual situations, the vehicle body space is insufficient to make the RGB mixed light uniform, which leads to differences in chromaticity and brightness at the light inlet end.
[0004] The most commonly used way at present is the two intersecting light guides. This way can theoretically be designed to be brightness-uniform, and the brightness value can be improved by increasing the lamp head to meet the customer's needs. However, during the production process, there are light guide sprue residues, light guide surface defects such as light guide parting lines, mold joint lines, slider lines, and large light guide surface roughness, as well as light guide clamping feet, installation deviations of the light guide and the lamp head, and lamp head installation deviations, which will still produce bright spots at the intersection of the light guide. The energy loss caused by the bright spots also affects the brightness value of the non-intersection area of the light guide, which leads to non-uniform brightness of the whole lamp.
[0005] Therefore, there is an urgent need for an ambient light structure that can solve the problem of brightness uniformity in the production of cross-beam lights and meet control requirements. Summary of the Invention
[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an automotive RGB ambient light that can solve the problem of brightness uniformity in the production of cross light guides, avoid the generation of bright spots, and meet the control requirements.
[0007] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: An automotive RGB ambient light includes a first light guide and a second light guide arranged in a cross-shaped manner; The first light guide includes a first light mixing section, a first cross section, and a first main light output section connected in sequence; The second light guide includes a second light mixing section, a second cross section, and a second main light output section connected in sequence; The first intersecting segment and the second intersecting segment intersect each other. The first light mixing segment is fitted with a first LED light source head at its end, and the second light mixing segment is fitted with a second LED light source head at its end. A light shield is fitted on the outer side of the first and second intersection segments. The two ends of the light shield extend and fit onto the first and second light mixing segments and are connected to the first and second LED light source heads.
[0008] Furthermore, the injection gate of the first light guide is located on the end face of the light guide in the non-light-emitting area and is cut off when the gate is cut, and the injection gate of the second light guide is located on the end face of the light guide in the non-light-emitting area and is cut off when the gate is cut.
[0009] Furthermore, the gate residues of the first and second light guides have a smooth and protruding appearance, with a protrusion height of <0.15mm, and the surface roughness Ra of the gate and surrounding area is ≤0.025μm.
[0010] Furthermore, the light shield is cylindrical and is used to block light leakage in all areas of the first and second light guide heads that are not designed with light guide teeth.
[0011] Furthermore, the parting line, mold splicing line, and slider line of the first and second light guides are not located at the center of the light-emitting surface of the light guides and the discontinuity is <0.1mm.
[0012] Furthermore, the first and second light guides are provided with patterned teeth, which are concave or convex teeth.
[0013] Furthermore, the surface roughness Ra of the patterned teeth is ≤0.1μm, and the surface roughness Ra of the light guide end face, the light emitting surface, and the transition area between the patterned teeth, excluding the patterned teeth, is ≤0.025μm.
[0014] Further, the first light mixing segment end is clamped with the first LED light source lamp cap through the clamping leg, and the second light mixing segment end is clamped with the second LED light source lamp cap through the clamping leg. The end clamping leg surface roughness of the first light mixing segment and the second light mixing segment is Ra≤0.1 μm. The clamping leg height of the first light guide close to the first LED light source lamp cap and the clamping leg height of the second light guide close to the second LED light source lamp cap are both ≤1.4 mm. The clamping leg height of the first light guide away from the first LED light source lamp cap and the clamping leg height of the second light guide away from the second LED light source lamp cap are both ≤0.4 mm.
[0015] Further, the distance tolerance between the light inlet surface of the first light guide and the first LED light source lamp cap is 0-0.1 mm, and the distance tolerance between the light inlet surface of the second light guide and the second LED light source lamp cap is 0-0.1 mm.
[0016] Further, the distance tolerance between the LED of the first LED light source lamp cap and the second LED light source lamp cap and the positioning point on the PCB board is ±0.1 mm.
[0017] By adopting the above technical scheme, the present application has the following beneficial effects: 1. The present application adopts two crossed light guides, i.e. the first light guide and the second light guide, crosses the first crossing segment and the second crossing segment with each other, and clamps the first LED light source lamp cap and the second LED light source lamp cap at the ends of the first light mixing segment and the second light mixing segment, respectively. The increased lamp caps can make the atmosphere lamp brighter, can realize higher brightness value requirement of the host factory, and can more easily meet the brightness uniformity in design. Meanwhile, the light shield is jointly sleeved outside the first crossing segment and the second crossing segment, and the light shield is sleeved at the first light mixing segment and the second light mixing segment at both ends, so that the light shield can shield the light leakage, ensures the brightness uniformity on the basis of not losing the brightness value, and meets the control requirement.
[0018] 2. The present application controls the light guide parting line, the mold splicing line and the slider line not to be arranged at the center of the light guide light emitting surface, controls the size of the gap, controls the roughness of all surfaces of the light guide, and controls the size and roughness of the clamping leg of the light guide, so as to reduce unnecessary light leakage of the light guide, and then improve the brightness uniformity of the whole lamp.
[0019] 3. The present application controls the LED patch and the precise positioning of the LED and the light guide to reduce the brightness value difference and ensure the uniformity of the whole lamp.
[0020] 4. The present application designs the light guide gate on the end surface of the light guide end in the non-light emitting area and cuts off the gate, thereby reducing light loss, improving light efficiency, and completely avoiding the bright spot caused by the light leakage of the light guide head gate, thereby improving the brightness uniformity.
[0021] 5. The present application makes the light shield into a cylindrical shape, which can shield the light leakage of all the areas without the designed light guide teeth, thereby completely avoiding unstable stray light and improving the uniformity of the whole lamp. BRIEF DESCRIPTION OF DRAWINGS
[0022] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0023] Figure 1 The overall structure of the first embodiment of the present application is shown in the figure. Figure 2 The light guide structure of the first embodiment of the present application is shown in the figure. Figure 3 The LED positioning requirement on the LED light source lamp holder circuit board of the first embodiment of the present application is shown in the figure. Figure 4 The straight type strip ambient lamp lighting effect diagram of the first embodiment of the present application is shown in the figure. Figure 5 The reflection type strip ambient lamp lighting effect diagram of the first embodiment of the present application is shown in the figure. Figure 6 The structure of the second embodiment of the present application is shown in the figure. Among them, 1. First light guide; 11. First light mixing section; 12. First cross section; 13. First main light emitting section; 2. Second light guide; 21. Second light mixing section; 22. Second cross section; 23. Second main light emitting section; 3. First LED light source lamp holder; 4. Second LED light source lamp holder; 5. Light shield. DETAILED DESCRIPTION
[0024] In order to make the content of the present application more easily and clearly understood, the present application will be further described in detail below according to specific embodiments and in combination with the drawings.
[0025] Embodiment one: As Figure 1 , 2As shown in the first embodiment, an automobile RGB atmosphere lamp is provided, which is mainly composed of a first light guide 1 and a second light guide 2 arranged in cross and other components. Specifically, the first light guide 1 is composed of a first light mixing section 11, a first cross section 12 and a first main light emitting section 13 connected in sequence, and the second light guide 2 is composed of a second light mixing section 21, a second cross section 22 and a second main light emitting section 23 connected in sequence. Among them, the first cross section 12 and the second cross section 22 intersect with each other, the first LED light source lamp head 3 is arranged at the end of the first light mixing section 11, and the second LED light source lamp head 4 is arranged at the end of the second light mixing section 21. At the same time, the light shield 5 is sleeved on the outer side of the first cross section 12 and the second cross section 22, and the light shield 5 extends outward at both ends and is sleeved on the first light mixing section 11 and the second light mixing section 21 and connected with the first LED light source lamp head 3 and the second LED light source lamp head 4. In this way, the direct positioning of the light guide and the lamp head can be ensured, the light shield 5 can shield the light leakage of the first light mixing section 11 and the first cross section 12 at the head of the first light guide 1 and the light leakage of the second light mixing section 21 and the second cross section 22 at the head of the second light guide 2, and then reduce the unstable stray light to improve the brightness uniformity of the whole lamp.
[0026] In order to reduce the loss of brightness and improve the light efficiency, the injection gate of the first light guide 1 in the embodiment is arranged on the end surface of the light guide at the non-light emitting area, and the gate is cut off when cutting the gate. The injection gate of the second light guide 2 is arranged on the end surface of the light guide at the non-light emitting area, and the gate is cut off when cutting the gate. In this way, the light loss can be reduced, the light efficiency can be improved, and the bright spot caused by the light leakage of the gate can be avoided, and the brightness uniformity can be improved.
[0027] In order to further reduce the light leakage and improve the brightness uniformity, the light guide production in the embodiment has specific quantitative requirements: Firstly, the gate residual appearance of the first light guide 1 and the second light guide 2 is flat and slightly convex, the convex height is <0.15mm, and the surface roughness Ra of the gate and the surrounding surface is ≤0.025μm. In this way, the light leakage at the gate can be reduced as much as possible, and the brightness uniformity can be improved.
[0028] Secondly, the light guide parting line, mold splicing line and slider line of the first light guide 1 and the second light guide 2 in the embodiment are not arranged at the center of the light emitting surface of the light guide, and the difference is <0.1mm. In this way, the light leakage caused by the light guide defects of the light guide mold can be reduced, and the brightness uniformity of the whole lamp can be improved.
[0029] Furthermore, the first light guide 1 and the second light guide 2 are provided with patterned teeth, which are concave teeth or convex teeth. Meanwhile, the surface roughness Ra of the patterned teeth is ≤0.1 μm, and the surface roughness Ra of the light guide light-incident end face, the light-emitting face, and the transition area between the patterned teeth is ≤0.025 μm. Such requirements can polish the light guide mold, thereby reducing the light leakage of the light guide caused by the roughness of the light guide, and finally ensuring the brightness uniformity of the whole lamp.
[0030] Finally, the end of the first light mixing section 11 in the embodiment is clamped with the first LED light source lamp holder 3 through a clamping leg, and the end of the second light mixing section 21 is clamped with the second LED light source lamp holder 4 through a clamping leg. Meanwhile, the surface roughness of the end clamping leg of the first light mixing section 11 and the second light mixing section 21 is Ra≤0.1 μm; the height of the clamping leg of the first light guide 1 close to the first LED light source lamp holder 3 and the height of the clamping leg of the second light guide 2 close to the second LED light source lamp holder 4 are both ≤1.4 mm; and the height of the clamping leg of the first light guide 1 away from the first LED light source lamp holder 3 and the height of the clamping leg of the second light guide 2 away from the second LED light source lamp holder 4 are both ≤0.4 mm. In this way, the size of the clamping leg can be minimized while ensuring the performance of the clamping leg, and the surface of the clamping leg can be mirror polished to reduce the light leakage caused by the clamping angle and improve the brightness uniformity of the whole lamp.
[0031] In order to reduce the influence of errors on the brightness value and further ensure the brightness uniformity, the embodiment also has specific quantitative requirements for the installation of the LED light source lamp holder: First, the distance tolerance between the light-incident face of the first light guide 1 and the first LED light source lamp holder 3 is 0-0.1 mm, and the distance tolerance between the light-incident face of the second light guide 2 and the second LED light source lamp holder 4 is 0-0.1 mm. In this way, the precise positioning of the LED and the light guide can be ensured, the influence of the brightness value caused by the distance difference between the LED and the light guide can be reduced, and the uniformity of the whole lamp can be ensured.
[0032] Secondly, as shown in Figure 3 , the distance tolerance between the LED and the positioning point on the PCB board of the first LED light source lamp holder 3 and the second LED light source lamp holder 4 in the embodiment is ±0.1 mm. Such high-precision patch requirements ensure the precise positioning of the LED, reduce the influence of the brightness value caused by the position difference of the LED patch, and ensure the uniformity of the whole lamp.
[0033] As shown in Figure 4 , 5 , after using the above scheme design, the straight-type strip ambient lamp lighting effect with uniform brightness shown in Figure 4 , and the reflective-type strip ambient lamp lighting effect with uniform brightness shown in Figure 5 can be obtained.
[0034] Embodiment Two: As Figure 6 shown, in the second embodiment, an automobile RGB atmosphere lamp is also provided, which retains most of the features in the first embodiment, and the light shield 5 is designed in a cylindrical shape, which can shield the light leakage of all the non-designed light guide tooth areas at the head of the first light guide 1 and the second light guide 2, thereby completely avoiding unstable stray light and improving the brightness uniformity of the whole lamp.
[0035] In the description of the embodiments of the present application, unless specifically defined and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0036] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, terms such as "first", "second" and other numerical terms are used herein, unless otherwise explicitly indicated herein. Therefore, the first element, component, region, layer or section discussed above can be referred to as the second element, component, region, layer or section without departing from the teachings of the example embodiments.
[0037] In the description of the present application, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0038] The above specific embodiments further illustrate the technical problems, technical solutions and beneficial effects solved by the present application, and it should be understood that the above description is only for specific embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. An automotive RGB ambience light characterized in that: The first light guide (1) and the second light guide (2) are arranged in cross; The first light guide (1) comprises a first light mixing section (11), a first cross section (12) and a first main light emitting section (13) connected in sequence; The second light guide (2) comprises a second light mixing section (21), a second cross section (22) and a second main light emitting section (23) connected in sequence; The first cross section (12) and the second cross section (22) cross each other, the first LED light source lamp holder (3) is arranged at the end of the first light mixing section (11) by clamping, and the second LED light source lamp holder (4) is arranged at the end of the second light mixing section (21) by clamping; The first cross section (12) and the second cross section (22) are jointly sleeved with the light shield (5) outside, and the light shield (5) is sleeved on the first light mixing section (11) and the second light mixing section (21) at both ends and connected with the first LED light source lamp holder (3) and the second LED light source lamp holder (4).
2. The automotive RGB ambient lamp according to claim 1, characterized in that: The injection gate of the first light guide (1) is arranged on the end surface of the light guide in the non-light emitting area and is cut off when the gate is cut, and the injection gate of the second light guide (2) is arranged on the end surface of the light guide in the non-light emitting area and is cut off when the gate is cut.
3. The automotive RGB ambient lamp according to claim 2, characterized in that: The gate residual appearance of the first light guide (1) and the second light guide (2) is flat and protruding, the protruding height is less than 0.15mm, and the surface roughness Ra of the gate and the surrounding surface is less than or equal to 0.025μm.
4. The automotive RGB ambient lamp according to claim 1, characterized in that: The light shield (5) is in a cylindrical shape and is used to shield the light leakage of all non-designed light guide tooth areas of the head of the first light guide (1) and the second light guide (2).
5. The automotive RGB ambient lamp according to claim 1, characterized in that: The light guide parting line, mold splicing line and slider line of the first light guide (1) and the second light guide (2) are not in the center of the light emitting surface of the light guide, and the difference is less than 0.1mm.
6. The automotive RGB ambient lamp according to claim 1, characterized in that: The first light guide (1) and the second light guide (2) are provided with pattern teeth, which are concave teeth or convex teeth.
7. The automotive RGB ambient lamp according to claim 6, characterized in that: The surface roughness Ra of the pattern teeth is less than or equal to 0.1μm, and the surface roughness Ra of the light guide light entering end surface, light emitting surface and transition area between the pattern teeth is less than or equal to 0.025μm.
8. The automotive RGB ambient lamp according to claim 1, wherein: The end of the first light mixing section (11) is clamped with the first LED light source lamp holder (3) through a clamping leg, and the end of the second light mixing section (21) is clamped with the second LED light source lamp holder (4) through a clamping leg; The surface roughness of the end clamping leg of the first light mixing section (11) and the second light mixing section (21) is Ra≤0.1μm; The clamping leg height of the first light guide (1) close to the first LED light source lamp holder (3) and the clamping leg height of the second light guide (2) close to the second LED light source lamp holder (4) are both less than or equal to 1.4mm; The clamping leg height of the first light guide (1) away from the first LED light source lamp holder (3) and the clamping leg height of the second light guide (2) away from the second LED light source lamp holder (4) are both less than or equal to 0.4mm.
9. The automotive RGB ambient lamp according to claim 1, wherein: The distance tolerance between the light entering surface of the first light guide (1) and the first LED light source lamp holder (3) is 0-0.1mm, and the distance tolerance between the light entering surface of the second light guide (2) and the second LED light source lamp holder (4) is 0-0.1mm.
10. The automotive RGB ambient lamp according to claim 1, characterized in that: The distance tolerance between the LED of the first LED light source lamp holder (3) and the second LED light source lamp holder (4) and the positioning point on the PCB board is ±0.1mm.