A high-transmittance blue light automobile atmosphere lamp shade structure based on a PUR+PC base material, a shade and a high-transmittance blue light automobile atmosphere lamp

Abstract

The utility model belongs to the technical field of car interior lamp, the mask structure has following three layers structure from below to above in proper order: PVD plating, PC layer and PUR layer, the PVD plating adopts evaporation plating and forms, the PVD plating includes aluminium nickel alloy plating. The utility model discloses an aluminium nickel alloy PVD plating layer formed by evaporation on the composite substrate layer of PUR layer and PC layer makes the light transmittance of mask stable and keeps at 18~20%, and blue light color phase is even, has excellent adhesion stability, is applicable to high -end car crystal atmosphere lamp.

Description

Technical Field

[0001] This utility model belongs to the field of automotive interior ambient lighting technology, specifically relating to a high-transmittance blue light automotive ambient light cover structure based on PUR+PC substrate and a high-transmittance blue light automotive ambient light. Background Technology

[0002] With the increasing demand for personalized automotive interiors, high-transmittance blue ambient lighting has become a key feature for enhancing the luxurious feel of vehicles. As a core component for light transmission and visual presentation, the ambient lighting cover must meet the requirements of high transmittance, uniform blue light hue, and structural stability for long-term use. However, existing automotive ambient lighting covers generally suffer from a trade-off between optical performance and structural reliability. Covers using a single plastic substrate, while meeting basic transmittance requirements, lack coating control, resulting in a chaotic blue light hue. Covers with coatings, on the other hand, often suffer from low transmittance and noticeable differences in blue light brightness due to improper coating material selection or poor thickness control. Furthermore, traditional magnetron sputtering coatings exhibit poor selective transmission of blue light, with hue fluctuations often exceeding 5%, requiring additional blue paint application for color correction, which actually reduces transmittance. Simultaneously, magnetron sputtering coatings often suffer from poor thickness uniformity and complex processes, frequently requiring post-processing to remove portions of the coating to improve transmittance, resulting in a mass production yield of only 40%–50%.

[0003] In terms of supply chain and cost control, existing ambient light covers rely on niche customized base materials and special targets to compensate for performance defects. The procurement cycle is long and there are high minimum order quantities, making it difficult to form a stable supply chain. At the same time, the cost of customized materials is 30% to 50% higher than that of conventional materials. In addition, the high loss caused by low pass rate significantly increases production and development costs, which restricts the large-scale application of high-transmittance blue light ambient lights.

[0004] In summary, developing an ambient light mask that can achieve high light transmittance and stable blue light while being applicable on a large scale has become the key to solving the current technical bottleneck in the industry. Utility Model Content

[0005] This invention aims to solve the problems of low light transmittance, unstable blue light hue, low mass production qualification rate, and high supply chain costs of existing automotive ambient light covers. It provides a high-transmittance blue light automotive ambient light cover structure based on PUR+PC substrate. Through a three-layer structure design combining a PUR layer, a PC layer, and an aluminum-nickel alloy PVD vapor deposition coating, it achieves stable light transmittance and uniform blue light effect for the ambient light, with strong coating adhesion and stable quality. At the same time, it solves the aforementioned cost problems of large-scale production.

[0006] This utility model provides a high-transmittance blue light automotive ambient light cover structure based on PUR+PC substrate. The high-transmittance blue light automotive ambient light cover structure based on PUR+PC substrate includes a PUR layer, a PC layer, and a PVD coating. The PVD coating is characterized in that: the PVD coating is in contact with the PC layer and is located inside the PC layer; the PC layer is in contact with the PUR layer and is located inside the PUR layer; the PVD coating is formed by vapor deposition and includes an aluminum-nickel alloy coating.

[0007] Preferably, the thickness of the PVD coating is 0.8~1.0 μm.

[0008] This utility model also provides a high-transmittance blue light automotive ambient light mask based on PUR+PC substrate, wherein the main light-transmitting part of the mask includes the mask structure described in the above technical solution.

[0009] Preferably, the light transmittance of the mask is 18-20%.

[0010] This utility model also provides a high-transmittance blue light automotive ambient light, including a light source assembly and the mask described in the above technical solution; the mask is fixed to the light-emitting end of the ambient light, and the light-transmitting area of ​​the mask corresponds to the light-emitting direction of the light source assembly.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model uses PUR and PC as base materials, combined with an aluminum-nickel alloy PVD coating formed by vapor deposition, so that the light transmittance of the mask is kept stable at 18~20%, and the blue light hue is uniform and the visual appearance is consistent before and after lighting. It solves the problem that the light transmittance of the coating of the existing magnetron sputtering process is usually less than 5%, the blue light hue is easy to fluctuate, and it is still impossible to adapt to high-end car models due to the need for laser processing and blue paint to touch up the color.

[0012] 2. This utility model can be adapted to the production of high-cost substrates, increasing the mass production qualification rate of semi-transparent PVD ambient light covers from 40%~50% of traditional processes to over 85%, ensuring the supply stability of large-scale production; effectively solving the problems of high production loss and difficulty in adapting to high-cost PUR and PC substrates in existing processes.

[0013] 3. In this utility model, the PUR and PC substrates have excellent interfacial bonding performance with the PVD functional coating, and the adhesion strength is high. This solves the problem that the existing ambient light cover coating has poor adhesion to the plastic substrate and is prone to peeling off after long-term use, affecting the appearance and function.

[0014] 4. This utility model utilizes a PUR / PC composite substrate that combines the impact resistance of PUR with the heat resistance and light transmittance of PC. Combined with readily available aluminum-nickel alloy target materials, it significantly reduces supply chain risks and development costs, solving the problems of existing high-end ambient light masks that rely on niche customized substrates and targets, resulting in long procurement cycles, high costs, and unstable supply chains. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of a high-transmittance blue light automotive ambient light cover based on PUR+PC substrate. Figure 2 This is a schematic diagram of the internal structure of a high-transmittance blue light automotive ambient light cover made of PUR+PC substrate.

[0017] In the diagram: 1. PUR layer; 2. PC layer; 3. PVD coating. Detailed Implementation

[0018] To further illustrate this utility model, the following detailed description, in conjunction with the accompanying drawings and embodiments, describes a high-transmittance blue light automotive ambient light mask structure and mask based on PUR+PC substrate, as well as a high-transmittance blue light automotive ambient light, provided by this utility model. However, these descriptions should not be construed as limiting the scope of protection of this utility model.

[0019] See attached document Figures 1-2 In the figure, 1 represents the PUR layer, 2 represents the PC layer, and 3 represents the PVD coating. This utility model provides a high-transmittance blue light automotive ambient light cover structure based on a PUR+PC substrate, comprising a PUR layer 1, a PC layer 2, and a PVD coating 3. The PVD coating 3 is characterized in that: the PVD coating 3 is in contact with the PC layer 2, and the PVD coating 3 is located inside the PC layer 2; the PC layer 2 is in contact with the PUR layer 1, and the PC layer 2 is located inside the PUR layer 1; the PVD coating 3 is formed by vapor deposition, and the PVD coating 3 includes an aluminum-nickel alloy coating.

[0020] Through the above technical solution, the light source of the automotive ambient light is usually located inside the mask, and the light needs to penetrate the mask from the inside out. This structural order is highly compatible with the light path. As the bottom layer, the PVD coating 3 allows the light to pass directly through it first, avoiding interference from the upper PC layer 2 and PUR layer 1. It also avoids damage to the coating caused by external pressure or friction, thus ensuring the stable transmission of the aluminum-nickel alloy PVD coating 3 formed by vapor deposition. At the same time, the vapor deposition process can make the PVD coating 3 uniform in thickness, effectively maintaining the integrity of the coating structure. This avoids color shift caused by uneven oxidation of ordinary coatings and prevents differences in blue light and dark caused by brightness deviation.

[0021] In this invention, the PC layer 2 is located between the PVD coating 3 and the PUR layer 1. PC possesses excellent rigidity and heat resistance, providing stable support to ensure the mask remains undeformed during subsequent use. It also limits excessive deformation of the upper PUR layer 1, preventing deformation of the PUR layer 1 from being transmitted to the lower PVD coating 3, which could cause cracking or uneven thickness, further ensuring the optical uniformity of the PVD coating 3. Its high light transmittance also prevents light attenuation caused by insufficient light transmission in the intermediate layer, providing core support for achieving the overall light transmittance standard. The PC layer 2, with its inherent rigidity, reduces the deformation of the PVD coating 3, lowering the risk of coating peeling.

[0022] In this invention, the PUR layer 1 is located on the top layer, directly contacting the automotive interior environment. It is self-healing and features an exquisite crystal-cut design, significantly enhancing the user's experience upon entering the vehicle. Its high transparency also makes the mask's appearance more aligned with the needs of high-end automotive crystal ambient lighting, balancing practicality and user experience. This invention ultimately achieves a light transmittance of 18-20% and a blue light hue fluctuation of ≤2%, meeting the optical requirements of high-end vehicle models.

[0023] Specifically, the thickness of the PVD coating 3 is 0.8~1.0 μm.

[0024] Through the above technical solution, the 0.8~1.0 μm thick PVD coating 3 can ensure coating uniformity and ensure stable transmission of aluminum-nickel alloy. This thickness can avoid easy wear of the coating due to excessive thinness or decrease in light transmittance due to excessive thickness, making it suitable for high-end automotive ambient lighting scenarios with stringent requirements for light transmittance and durability. The PVD coating 3 of this thickness can further improve the integrity of the coating structure and adhesion stability, thereby ensuring the optical performance and service life of the mask in long-term use.

[0025] This utility model also provides a high-transmittance blue light automotive ambient light cover based on PUR+PC substrate, wherein the main light-transmitting part of the cover includes the aforementioned cover structure. Since this light cover adopts the aforementioned technical solution of a high-transmittance blue light automotive ambient light cover structure based on PUR+PC substrate, it possesses at least all the beneficial effects brought about by the aforementioned technical solution, which will not be elaborated upon here.

[0026] Specifically, the light transmittance of the mask is 18-20%.

[0027] Through the above technical solution, a light transmittance of 18-20% can ensure a moderate amount of blue light transmission. This avoids both the glare and overly strong atmosphere caused by excessive light transmittance, and the dimness and insufficient atmosphere caused by excessive light transmittance. This makes it more suitable for car interior scenarios that require creating a soft and comfortable blue light atmosphere, enhancing the user's experience of the car interior atmosphere and meeting the quality requirements of high-end models.

[0028] This utility model also provides a high-transmittance blue light automotive ambient light, including a light source assembly and the mask described in the above technical solution; the mask is fixed to the light-emitting end of the ambient light, and the light-transmitting area of ​​the mask corresponds to the light-emitting direction of the light source assembly. Since this ambient light adopts the above-mentioned technical solution of a high-transmittance blue light automotive ambient light mask based on PUR+PC substrate, it has at least all the beneficial effects brought by the above technical solution, which will not be elaborated here.

[0029] The specific implementation process is as follows.

[0030] Example 1 1. Fabrication of a high-transmittance blue light automotive ambient light cover structure based on PUR+PC substrate PC and PUR were used to prepare a PUR+PC composite structure through injection molding. After molding, PVD coating 3 was deposited. The target material was a commercially available aluminum-nickel alloy. The coating thicknesses of the three samples were 0.8, 0.9 and 1.0 μm, respectively. After the evaporation was completed, the three samples were taken out for performance testing.

[0031] 2. Performance Testing 2.1 Optical Performance Testing: Transmittance was tested using a spectrophotometer according to ASTM D1003 standard. Blue light hue was also tested at wavelengths of 450–460 nm. Test results showed that the transmittance of the three samples was between 18% and 20%, with hue fluctuation ≤1.5% in the visible light band, and no visual difference before and after illumination.

[0032] 2.2 Adhesion Performance Testing: Referring to Q / SQR S1-16-2021 "Requirements for Coatings of Automotive Interior Parts", the Andre scratch test (load 500 g) and the GB / T 9286-1998 cross-cut test (cross-cut spacing 1 mm) were used for testing. The test results showed that the adhesion of all three samples was Grade 1, with no peeling or paint loss.

[0033] 2.3 Volatility and Odor Testing: Testing was conducted according to the Q / SQR T1 series standards (SGS testing methods). The atomization test results showed an average atomization value of 0.28 mg, with a slight oil film, meeting the volatility requirements for automotive interior materials; formaldehyde release was not detected (ND, MDL = 1.0 mg / kg); odor test results ranged from 2.5 to 3.0. A 2.5 rating falls between "a slight odor, detectable only with effort" and "a noticeable odor, easily detectable," while a 3.0 rating indicates a noticeable odor. However, all the above samples exhibited acceptable odors, meeting the sensory requirements for automotive interior materials.

[0034] Example 2

[0035] 1. Production of high-transmittance blue light automotive ambient lighting This embodiment uses the mask structure prepared in Example 1 as the light-transmitting component to assemble a high-transmittance blue light automotive ambient light mask based on PUR+PC substrate. An LED blue light source (wavelength 455 nm, power 3 W, color rendering index Ra≥80) is selected, ensuring that the operating temperature of the light source is ≤60℃. The mask is fixed to the light-emitting end of the LED lamp body, and the light-transmitting area of ​​the mask corresponds to the light-emitting direction of the light source component to avoid light leakage or light deviation, thus producing a high-transmittance blue light automotive ambient light.

[0036] 2. Performance Testing 2.1 Optical performance testing: After the LED light source is lit, the light emitted from the mask is tested with a spectrometer. The blue light purity is ≥90%, and there is no obvious color deviation. 2.2 Durability test: According to the 1000-hour accelerated aging standard (-40℃~85℃ temperature cycle, 85℃ / 85% RH damp heat, UV irradiation), the light transmittance of the cover decreased by ≤5%, the coating did not peel off, and the brightness of the LED light source decreased by ≤8%.

[0037] 2.3 Safety test: In accordance with GB 7000.1-2015 "Luminaires - Part 1: General requirements and tests", the insulation resistance (≥2MΩ) and dielectric strength (1500 V / 1 min without breakdown) of the ambient light were tested and both met the safety standards.

[0038] In summary, this invention achieves stable high light transmittance, stable blue light, strong adhesion, and consistent performance, effectively solving the industry pain points of low light transmittance, fluctuating blue light, and easy coating peeling in existing ambient light covers. Furthermore, the mass production qualification rate is ≥85%, expanding the large-scale application of high-transmittance blue light ambient lights.

[0039] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-transmittance blue light automotive atmosphere lamp cover structure based on a PUR+PC substrate, comprising a PUR layer (1), a PC layer (2) and a PVD plating layer (3), characterized in that: The PVD coating (3) is in contact with the PC layer (2), and the PVD coating (3) is located inside the PC layer (2); the PC layer (2) is in contact with the PUR layer (1), and the PC layer (2) is located inside the PUR layer (1); the PVD coating (3) is formed by vapor deposition, and the PVD coating (3) includes an aluminum-nickel alloy coating.

2. The mask structure according to claim 1, characterized in that, The thickness of the PVD coating (3) is 0.8~1.0 μm.

3. A high-transmittance blue light automotive ambient light cover based on PUR+PC substrate, characterized in that, The main light-transmitting portion of the mask includes the mask structure described in claim 1 or 2.

4. The face mask according to claim 3, characterized in that, The light transmittance of the mask is 18-20%.

5. A high-transmittance blue light automotive ambient light, characterized in that, It includes a light source assembly and a face mask as described in claim 3 or 4; the face mask is fixed to the light-emitting end of the ambient light, and the light-transmitting area of ​​the face mask corresponds to the light-emitting direction of the light source assembly.

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