Automobile interior starry sky cover plate and automobile ceiling

Abstract

The invention relates to an automobile interior starry sky cover plate and an automobile ceiling, and belongs to the technical field of automobile starry sky roofs. The starry sky cover plate comprises a starry sky cover plate framework, a plurality of circuit boards arranged on the passenger side of the starry sky cover plate framework and a light-transmitting surface layer arranged on the surfaces of the starry sky cover plate framework and the circuit boards, the circuit boards are strip-shaped, a plurality of LED light-emitting elements are arranged on the circuit boards, and the starry sky cover plate further comprises a filling layer arranged on the back face of the light-transmitting surface layer. According to the starry sky cover plate framework, the LEDs under the light-transmitting surface layer are adopted as light-emitting elements, the color and brightness of each light spot can be controlled, the strip-shaped circuit board enables the shape difference to be smaller when the circuit board is pasted to the starry sky cover plate framework, the LEDs are adopted as the light spots, and the problems that an optical fiber is poor in temperature resistance, and a back space is needed when the optical fiber is bent are solved. The arrangement of the filling layer enables the appearance of one side of the circuit board with the electronic components to be smoother, the contact area is larger when the light-transmitting surface layer is installed, and the connection and positioning of the light-transmitting surface layer are firmer.

Description

Technical Field

[0001] This invention relates to a starry sky cover for automotive interiors and an automotive headliner, belonging to the field of automotive starry sky headliner technology. Background Technology

[0002] A starry sky headliner is a type of illuminated headliner. The headliner glows like twinkling stars or shooting stars, creating a dynamic optical effect for car interiors, which is loved by many car owners.

[0003] Starry sky ceilings are typically made of optical fibers. One end of the fiber connects to an optical engine, while the other end is exposed on the front of the ceiling and trimmed to be flush with the ceiling fabric. The light emitted by the optical engine is transmitted through the optical fiber to the ceiling surface, creating the starry sky effect.

[0004] Current starry sky ceilings have the problem of sharp fiber optic cables. This is because the trimming of the fibers creates sharp edges, and when you press your fingers on the ceiling surface, the ceiling fabric will sink, causing the fiber optic cable to prick your fingers. This unpleasant experience also lowers the perceived quality of the starry sky ceiling.

[0005] Furthermore, assembling optical fibers is a very time-consuming and labor-intensive task. First, fiber optic holes must be drilled in the ceiling. Then, each fiber is threaded through one of these holes, secured with adhesive on the back, and trimmed on the front. Each fiber requires the same steps, and if there are specific requirements for the light spot, such as matching the fiber to the light-transmitting hole, it becomes even more complex. The number of optical fibers is typically no less than 300, resulting in very low production efficiency for starry sky ceilings, making mass production difficult.

[0006] Furthermore, optical fibers have a minimum bending radius. If the bending is too large, exceeding this radius, light leakage will occur, and the fiber may even break. Therefore, space must be left behind the headliner to accommodate the optical fiber, typically no less than 15mm thick. In new energy vehicles, the top space is particularly valuable because the bottom space is occupied by the battery. Many models do not allow enough top space, making it impossible to apply a starry sky headliner. Therefore, the industry urgently needs a new type of automotive interior starry sky cover and headliner that can solve the problems of existing optical fibers being uncomfortable to handle, inefficient, and space-consuming. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a starry sky cover for automotive interiors and an automotive headliner using the starry sky cover.

[0008] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A starry sky cover for automotive interiors includes a starry sky cover frame, multiple circuit boards disposed on the passenger side of the starry sky cover frame, and a light-transmitting skin layer disposed on the surface of the starry sky cover frame and the circuit boards. The circuit boards are strip-shaped and are flexible or rigid circuit boards. Multiple LED light-emitting elements are disposed on the circuit boards, and the LED light-emitting elements are Mini LEDs. The invention also includes a filling layer disposed on the back side of the light-transmitting skin layer. The filling layer is disposed on the surface of the circuit board or on the surface of the starry sky cover frame and the circuit board.

[0009] The beneficial effects of this invention are: By using a translucent outer skin layer, the visible surface of the cover plate can emit light without drilling, improving the appearance of existing starry sky roofs. Using LEDs beneath the translucent outer skin layer as light-emitting elements, each light point corresponds to an independent light-emitting element, allowing for precise control of the color and brightness of each point. The strip-shaped circuit board can be made of rigid material, minimizing shape differences when attached to the starry sky cover frame. Using a circuit board with large length and width dimensions would be problematic because the circuit board is planar while the starry sky cover frame, corresponding to the shape of a car body, is curved, making a smooth fit impossible. Alternatively, a flexible circuit board can be used, reducing thickness and weight while facilitating bending and better fitting to the starry sky cover frame. With multiple light points on a single circuit board in fixed relative positions, determining the position of one circuit board determines the positions of multiple light points, improving production efficiency and position repeatability. Compared to traditional starry sky ceilings, using LEDs directly as the light source avoids the use of optical fibers, solving the problems of poor temperature resistance and the need for back space due to fiber optic bending. Mini LEDs are small in size, low in power, and low in cost, making them very suitable for starry sky ceiling applications. The infill layer allows for a smoother appearance on the side of the circuit board with electronic components, resulting in a larger contact area during the installation of the light-transmitting skin layer. This leads to a more secure connection and positioning of the light-transmitting skin layer. With infill layers on both the starry sky cover frame and the surface of the circuit board, the surface of the infill layer is smooth, and the light-transmitting skin layer is placed on the surface of the infill layer, resulting in an even smoother surface and a stable and reliable connection.

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Furthermore, the circuit board uses an aluminum substrate.

[0012] The beneficial effect of adopting the above-mentioned further solution is that the aluminum substrate provides excellent heat dissipation. Although MiniLEDs have low power, they are numerous, so heat generation must be considered. Because the curvature of the starry sky cover plate is not significant, mounting the aluminum substrate onto the cover plate frame is not a problem. MiniLEDs are very small; using an aluminum substrate allows heat transfer to the substrate, greatly increasing the heat dissipation area, reducing the MiniLED temperature, and extending its lifespan. The temperature resistance of MiniLED circuits using aluminum substrates already surpasses that of fiber optic starry sky displays.

[0013] Furthermore, when the filling layer is disposed on the surface of the circuit board, the light-transmitting skin layer is connected to the starry sky cover frame by an adhesive, or the light-transmitting skin layer is connected to the starry sky cover frame and the filling layer by an adhesive. When the filling layer is disposed on the surface of the starry sky cover frame and the circuit board, the light-transmitting skin layer is bonded to the starry sky cover frame and the circuit board through the filling layer, or the light-transmitting skin layer is connected to the filling layer by an adhesive.

[0014] The beneficial effects of adopting the above-mentioned further solution are that, since there are electronic components on the front side of the circuit board, the filling layer makes the circuit board flatter, which is conducive to the bonding of the light-transmitting skin layer to the starry sky cover frame and the circuit board surface. This increases the contact area of ​​the light-transmitting skin layer, making the bonding stronger. When the filling layer is only placed on the surface of the circuit board, the light-transmitting skin layer can be connected to the starry sky cover frame with adhesive, and the light-transmitting skin layer is bonded to the filling layer, thus covering the starry sky cover frame and the filling layer. Of course, the light-transmitting skin layer can also be connected to the starry sky cover frame and the filling layer separately with adhesive, and adhesive is also used between the filling layer and the light-transmitting skin layer. When the filling layer covers the starry sky cover frame and the circuit board surface, the light-transmitting skin layer can be bonded to the starry sky cover frame and the circuit board through the filling layer. Of course, the light-transmitting skin layer can also be bonded to the filling layer covering the starry sky cover frame and the circuit board with adhesive.

[0015] Furthermore, the strip shape of the circuit board can be straight, curved, zigzag, or dendritic.

[0016] The advantage of adopting the above-mentioned further solutions is that, for circuit board shapes, linear shapes are the most common. If used for dot matrix displays, linear shapes are not a problem. However, starry sky tops need to simulate the appearance of a starry sky, and if the light spots are too neat, they will not resemble a starry sky. Therefore, curved, zigzag, and even tree-shaped circuit boards also have their uses.

[0017] Furthermore, the starry sky cover frame is provided with multiple grooves, and the circuit board is installed in the corresponding grooves.

[0018] The advantages of adopting the above-mentioned further solution are that the circuit board can be directly pasted onto the starry sky cover frame without grooves on its surface, which is especially suitable for situations with a large number of light spots and a high circuit board coverage ratio. Alternatively, grooves can be set in the starry sky cover frame, and the circuit board can be directly installed in the grooves. The circuit board and the circuit components mounted on it will not protrude significantly from the surface of the starry sky cover frame, resulting in a smoother surface after the light-transmitting skin layer is attached. With the grooves set, only the filler layer needs to be applied at the groove locations, thus reducing the amount of filler layer required.

[0019] Furthermore, the starry sky cover frame is provided with through holes, and one end of the circuit board or the wire harness connected to the circuit board can pass through the through holes and connect to the controller located on the back of the starry sky cover frame.

[0020] The advantage of adopting the above-mentioned further solution is that the controller of the LED light-emitting element is located on the back of the starry sky cover frame, and the circuit board located on the front of the starry sky cover frame must be electrically connected to the controller. When the size of the circuit board is small and the light-emitting area is far from the edge of the starry sky cover frame, it is more convenient to drill a hole in the starry sky cover frame so that the circuit board or the wire harness connected to the circuit board can pass through the hole to reach the back.

[0021] Furthermore, the through hole is elongated in shape.

[0022] The advantage of adopting the above-mentioned further solution is that the elongated hole shape makes it easier for the end of the circuit board or the wire harness connected to the circuit board to pass smoothly through the through hole, pass through the star cover frame, enter the back of the cover, and connect to the controller.

[0023] Furthermore, the end of the circuit board extends to the edge of the starry sky cover frame and wraps around to the back of the starry sky cover frame to connect with the controller located on the back of the starry sky cover frame.

[0024] The advantage of adopting the above-mentioned further solution is that when the size of the circuit board is large and the effective area of ​​the circuit board is close to the edge of the starry sky cover frame, it can be routed from the edge of the starry sky cover frame to the back and connected to the controller located on the back of the starry sky cover frame.

[0025] Furthermore, the LED light-emitting element is disposed on the front side of the circuit board near the light-transmitting outer skin layer.

[0026] The beneficial effect of adopting the above-mentioned further solution is that the LED light-emitting element can be set on the front side of the circuit board, that is, on the surface near the light-transmitting skin layer. After the components on the circuit board are installed, the filler layer, such as silicone, can be filled between the components on its surface. This satisfies the light transmission requirements of the LED light-emitting element while also making the surface of the circuit board flat, thus ensuring the flatness after the light-transmitting skin layer is pasted. Alternatively, silicone can be used to fill the gaps after the circuit board is mounted on the starry sky cover frame. This not only eliminates the gaps between circuit components but also solves the gaps between circuit boards and between the circuit board and the starry sky cover frame.

[0027] Furthermore, the LED light-emitting element is disposed on the back side of the circuit board away from the light-transmitting skin layer, with the light emission direction facing the light-transmitting skin layer. The LED light-emitting element is provided with a focusing lens, and the circuit board is provided with a light-transmitting hole for the light from the LED light-emitting element to pass through.

[0028] The beneficial effect of adopting the above-mentioned further solution is that the number of electronic components on the side of the circuit board near the light-transmitting surface is reduced or completely eliminated, and the adhesion between the light-transmitting surface and the circuit board is smoother. The disadvantage of placing the electronic components on the side of the circuit board near the light-transmitting surface is that the side with the electronic components is uneven, making it difficult to achieve a smooth adhesion with the light-transmitting surface. Placing the electronic components on the side of the circuit board away from the light-transmitting surface, with the light-emitting side facing the light-transmitting surface, and creating light-transmitting holes on the circuit board to allow the light from the LED light-emitting element to pass through, then the problem of excessively large light spots caused by the large LED emission angle must be addressed. A focusing lens can be placed on the surface of the LED light-emitting chip to improve luminous efficiency. Of course, if the light-emitting element is located on the back of the circuit board, other electronic components should also be located on the back of the circuit board. This will make the front of the circuit board flatter and more suitable for adhesion to the light-transmitting surface.

[0029] The present invention also relates to a car roof, including the car interior starry sky cover as described above, wherein the car roof has a sunroof opening, and the car interior starry sky cover is correspondingly disposed at the sunroof opening and covers the sunroof opening.

[0030] The beneficial effects of this invention are that the combination of the car roof with sunroof opening and the car interior starry sky cover can reduce the size of the starry sky cover, which is convenient for production and transportation and can reduce costs. More importantly, the starry sky cover can be set in a relatively flat area of ​​the car roof, that is, at the sunroof opening, and a light-transmitting skin material with low elongation can be used, avoiding various defects caused by low material elongation in the headlights, armrests and other positions. Attached Figure Description

[0031] Figure 1 This is a structural schematic diagram of a filling layer construction state according to the present invention; Figure 2 This is a partially enlarged structural diagram of a filling layer under construction conditions according to the present invention; Figure 3 This is a schematic diagram of the back side of the circuit board of the present invention extending to the starry sky cover plate skeleton; Figure 4 This is a schematic diagram showing the circuit board of the present invention in a linear configuration; Figure 5 This is a schematic diagram showing the curved shape of the circuit board of the present invention; Figure 6 This is a schematic diagram showing the circuit board of the present invention in a zigzag shape; Figure 7 This is a schematic diagram showing that the circuit board of the present invention is in the shape of a long tree branch; Figure 8 This is a schematic diagram showing that the circuit board of the present invention is in the shape of a short tree branch; Figure 9 This is a schematic diagram of the structure of the grooved starry sky cover frame of the present invention; Figure 10 This is a schematic cross-sectional view of the grooved starry sky cover frame of the present invention; Figure 11 This is a partial cross-sectional structural diagram of the grooved starry sky cover frame of the present invention; Figure 12 This is a schematic diagram of the circuit board installed in the groove according to the present invention; Figure 13 This is a schematic diagram of the LED light-emitting element of the present invention mounted on the back of a circuit board; Figure 14 This is a schematic diagram of the structure of the car roof of the present invention.

[0032] In the diagram, 1. Starry sky cover frame; 2. Transparent outer skin layer; 3. Circuit board; 31. LED light-emitting element; 32. Electronic component; 33. Filler layer; 34. Wire harness; 35. Solder joint; 36. Light-transmitting hole; 37. Condensing lens; 4. Groove; 5. Through hole; 6. Car roof; 7. Sunroof opening. Detailed Implementation

[0033] The principles and features of the present invention are described below with reference to examples. The examples are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0034] like Figure 14 As shown, the car roof 6 has two openings. The front opening, typically used for actual ventilation and lighting, can be opened. The rear opening is a sunroof opening 7, typically used for lighting; although it has glass, it cannot be opened. A starry sky cover can be used to cover the sunroof opening 7 from above to achieve a starry sky effect.

[0035] On a car roof, the areas around the headlights, side armrests, sun visors, and sunroof are prone to significant deformation, requiring fabrics with high elongation. Translucent fabrics have low elongation and are unsuitable for car roofs. However, the top edge of the sunroof opening 7 is relatively flat, and the starry sky cover, located above the sunroof opening 7 and conforming to the body panel's shape, is also relatively flat.

[0036] like Figures 1-13 As shown, a starry sky cover for automotive interiors includes a starry sky cover frame 1, multiple circuit boards 3 disposed on the passenger side of the starry sky cover frame 1, and a light-transmitting outer skin layer 2 disposed on the surface of the starry sky cover frame 1 and the circuit boards 3. The circuit boards 3 are strip-shaped and are flexible or rigid circuit boards. The circuit boards 3 are provided with multiple LED light-emitting elements 31, which are Mini LEDs. The cover also includes a filling layer 33 disposed on the back of the light-transmitting outer skin layer 2. The filling layer 33 is disposed on the surface of the circuit board or on the surface of the starry sky cover frame 1 and the circuit board 3.

[0037] The circuit board 3 can also be made of an aluminum substrate. The advantage of an aluminum substrate is its good thermal conductivity, which transfers the heat generated by the LED chips or other electronic components to the larger aluminum substrate area. This increased heat dissipation area significantly reduces the operating temperature of the LED chips and electronic components, thus improving their lifespan and stability.

[0038] Compared to traditional fiber optic starry sky roofs, the solution presented in this application offers superior temperature resistance. Furthermore, the fiber optic cable, located between the roof and the sheet metal, experiences higher temperatures when the vehicle is exposed to direct sunlight. In contrast, the circuit board in this application, containing LEDs and electronic components, is located on the passenger side of the roof frame. Benefiting from the insulation provided by the roof frame, it withstands significantly lower temperatures. This is why the solution presented in this application exhibits better temperature resistance than traditional fiber optic starry sky roofs.

[0039] When the filling layer 33 is disposed on the surface of the circuit board 3, the light-transmitting skin layer 2 is connected to the starry sky cover frame 1 by an adhesive, or the light-transmitting skin layer 2 is connected to the starry sky cover frame 1 and the filling layer 33 by an adhesive. When the filler layer 33 is disposed on the surface of the starry sky cover frame 1 and the circuit board 3, the light-transmitting skin layer 2 is bonded to the starry sky cover frame 1 and the circuit board 3 through the filler layer 33, or the light-transmitting skin layer 2 is connected to the filler layer 33 by an adhesive. The front of the circuit board has electronic components; the filler layer makes the circuit board flatter, which is beneficial for the bonding of the light-transmitting skin layer to the starry sky cover frame and the circuit board surface, increasing the contact area of ​​the light-transmitting skin layer and making the bonding of the light-transmitting skin layer more secure.

[0040] When the filler layer is only placed on the surface of the circuit board, such as when the starry sky cover frame 1 has a groove for mounting the circuit board 3, the circuit board is pasted in the groove, and the filler layer can be confined within the groove. The light-transmitting skin layer can be connected to the starry sky cover frame with adhesive, and the light-transmitting skin layer is bonded to the filler layer, thus covering the starry sky cover frame and the filler layer. Of course, the light-transmitting skin layer can also be connected to the starry sky cover frame and the filler layer with adhesive, and adhesive is also used between the filler layer and the light-transmitting skin layer.

[0041] When the filler layer covers the starry sky cover frame and the circuit board surface, if the starry sky cover frame 1 does not have a groove, the circuit board is attached to the flat surface of the starry sky cover frame, covering part or all of the starry sky cover frame. The area of ​​the filler layer can correspond to the starry sky cover frame. The light-transmitting skin layer can be bonded to the starry sky cover frame and the circuit board through the filler layer. Of course, the light-transmitting skin layer can also be bonded to the filler layer covering the starry sky cover frame and the circuit board using adhesive.

[0042] like Figure 1 and Figure 2 As shown, the filling layer 33 is disposed on the surface of the starry sky cover frame 1 and the circuit board 3. The light-transmitting skin layer 2 can be bonded to the starry sky cover frame 1 and the circuit board 3 through the filling layer 33.

[0043] Alternatively, a filling layer 33 can be first set on the surface of the starry sky cover frame 1 and the circuit board, and then the light-transmitting skin can be glued to the filling layer 33 with adhesive.

[0044] The strip-shaped form of the circuit board 3 can be straight, curved, zigzag, or tree-like. The circuit board 3 can be attached to the starry sky cover frame 1 or to the groove 4 on the starry sky cover frame 1. The straight shape is the most common for the circuit board 3, such as... Figure 4 As shown; curved shape as Figure 5 As shown; broken line type as Figure 6 As shown; long tree branch shape, like Figure 7 As shown; short tree branch type Figure 8 As shown. If used for dot matrix display, a straight line is fine. However, a starry sky top needs to simulate the appearance of a starry sky. If the light spots are too neat, it won't look like a starry sky. Therefore, curved, zigzag, or even tree-shaped circuit boards 3 also have their uses. Each light spot has its own position, and the LED light-emitting elements 31 on the circuit board 3 can be randomly arranged without being affected by the shape of the circuit board 3, in order to better present the starry sky top effect.

[0045] The starry sky cover frame 1 has a through hole 5. One end of the circuit board 3 or the wire harness connected to the circuit board 3 can pass through the through hole 5 and connect to the controller located on the back of the starry sky cover frame 1. The controller of the LED light-emitting element 31 is located on the back of the starry sky cover frame 1. The circuit board 3 located on the front of the starry sky cover frame 1 must be electrically connected to the controller. When the size of the circuit board 3 is small and the light-emitting area is far from the edge of the starry sky cover frame 1, it is more convenient to drill a hole in the starry sky cover frame 1 so that the circuit board 3 or the wire harness connected to the circuit board 3 can pass through the hole to reach the back.

[0046] The through hole 5 is an elongated shape. The elongated shape, without compromising the strength and flatness of the starry sky cover frame 1, makes it easier for the end of the circuit board 3 or the wire harness connected to the circuit board 3 to pass smoothly through the through hole 5, pass through the starry sky cover frame 1, and enter the back of the cover to connect with the controller.

[0047] The end of the circuit board 3 extends to the edge of the starry sky cover frame 1 and wraps around to the back of the starry sky cover frame 1 to connect with the controller located on the back of the starry sky cover frame 1, as shown below. Figure 3 As shown. When the size of circuit board 3 is large and the effective area of ​​circuit board 3 is close to the edge of the starry sky cover frame 1, it can be wrapped around from the edge of the starry sky cover frame to the back and connected to the controller located on the back of the starry sky cover frame 1. Circuit board 3 can be wrapped around to the back of the starry sky cover frame 1 and can be pasted on the back of the starry sky cover frame 1. It is connected to the wiring harness 34 through solder point 35, and then electrically connected to the controller through the wiring harness 34.

[0048] Circuit board 3 can be directly pasted onto the starry sky cover frame 1, which has no grooves on its surface. This is especially suitable for situations where there are a large number of light spots and circuit board 3 has a high coverage ratio, such as... Figure 1-3 As shown.

[0049] A groove 4 can also be set on the starry sky cover frame 1, such as... Figures 9-13 As shown, circuit board 3 can be directly installed in groove 4. The circuit components on circuit board 3 will not protrude significantly from the surface of starry sky cover frame 1, and the surface is smoother after the light-transmitting skin layer 2 is attached. With groove 4 provided, the filling layer 33 can be applied only at the groove 4 location, such as... Figure 12 As shown, this also reduces the amount of silicone used in the filler layer 33. The filler layer 33 is disposed on the surface of the circuit board 3, and the outer surface of the filler layer 33 is flush with the starry sky cover frame 1, ensuring the flatness of the surface on which the light-transmitting skin layer 2 is bonded. The light-transmitting skin layer 2 is connected to the starry sky cover frame 1 and the filler layer 33 by adhesive, making the bonding of the light-transmitting skin layer 2 more secure and the surface smoother.

[0050] The LED light-emitting element 31 is disposed on the front side of the circuit board 3 near the light-transmitting outer skin layer 2. For example... Figure 12 As shown, the LED light-emitting element 31 can be set on the front side of the circuit board 3, that is, on the surface close to the light-transmitting skin layer 2. After the components on the circuit board 3 are installed, the filling layer 33, such as silicone, can be filled between the components on its surface. In this way, while meeting the light transmission requirements of the LED light-emitting element 31, the surface of the circuit board 3 can also be made flat, thus ensuring the flatness after the light-transmitting skin layer 2 is pasted.

[0051] In another embodiment, the LED light-emitting element 31 is disposed on the back side of the circuit board 3 away from the light-transmitting outer skin layer 2, such as... Figure 13 As shown, the light emission direction is towards the light-transmitting outer skin layer 2. The LED light-emitting element 31 is equipped with a focusing lens 37, and the circuit board 3 is equipped with a light-transmitting hole 36 for the light from the LED light-emitting element 31 to pass through. The number of electronic components on the side of the circuit board near the light-transmitting outer skin is reduced or completely eliminated, resulting in a smoother bond between the light-transmitting outer skin and the circuit board. During installation, a filling layer, such as silicone, is first applied to the groove. Then, the circuit board is installed into the groove. Pressure and temperature are used to fill the gap between the groove and the circuit board with silicone, and it cures. Finally, the light-transmitting outer skin is bonded with adhesive, completing the basic structure of the starry sky cover.

[0052] The filler layer 33 is a transparent material, which will not affect the light transmission effect of the LED light-emitting element 31. In addition, the presence of the filler layer 33 can also prevent the electronic component 32 from being subjected to excessive local stress, thus protecting the circuit board 3 and the components on the circuit board 3.

[0053] The translucent outer skin layer 2 is a membrane structure made of materials such as thermoplastic polyolefin (TPO) and thermoplastic polyurethane elastomer (TPU). It can be used with or without a base fabric. The translucent outer skin has a low light transmittance, typically between 5-25%. This allows light to pass through without the need for perforations, and the low transmittance also helps to conceal the shapes of the car roof 6, the starry sky cover frame 1, and the circuit board 3, resulting in a simpler and more aesthetically pleasing appearance for the starry sky cover. A water-based polyurethane adhesive can be pre-sprayed onto the translucent outer skin to improve the adhesion between the filler material and the translucent outer skin.

[0054] Construction method of filler layer 33: After the starry sky cover plate skeleton 1 is bonded to the flexible circuit board 3, the concave side faces upward, as shown. Figure 1 and Figure 2As shown, a translucent outer skin layer 2 is placed on top, with a filler layer 33 applied in the middle. The translucent outer skin layer 2 is laid on top of the starry sky cover frame 1 and pressed by a mold. The filler layer 33 flows, filling the gap between the translucent outer skin and the starry sky cover frame 1. Then, the filler layer 33 is cured, bonding the translucent outer skin layer 2 to the starry sky cover frame 1 or circuit board 3 together. The filler material here can be silicone adhesive; it can also be other filler materials, such as epoxy resin.

[0055] Another approach is to separate the application of the filler layer 33 from the bonding of the translucent outer skin layer 2. First, the filler layer 33 is used to eliminate unwanted protrusions and depressions on the surface of the starry sky cover frame 1, and then adhesive is used to bond the starry sky cover frame 1 and the translucent outer skin layer 2.

[0056] The present invention provides a car roof 6 with a sunroof opening 7 and a starry sky cover frame 1 that work together to reduce the size of the starry sky cover, making production and transportation easier and reducing costs. More importantly, the starry sky cover frame 1 can be set in a relatively flat area of ​​the car roof 6, i.e., at the sunroof opening 7, and low elongation materials can be used, avoiding various defects caused by low elongation of materials in areas such as headlights and armrests.

[0057] Nine hundred LED light-emitting elements 31 are directly mounted on a 1000mm × 1000mm flexible printed circuit board (FPC) 3, achieving random and individually controllable light spot arrangement. However, wrinkles occur when the circuit board 3 is pasted onto the starry sky cover frame 1. This is because the automotive interior headliner 6 is a three-dimensional curved surface, not a standard flat structure, and a single FPC has almost no elongation, so the FPC cannot perfectly fit the starry sky cover frame 1. For the starry sky headliner, this narrow, strip-shaped flexible circuit board 3, when mounted on the curved surface of the starry sky cover frame 1, can bend naturally without wrinkles. To maintain flatness after the circuit board 3 is mounted on the starry sky cover frame 1, a long, narrow groove 4 can be provided at the mounting location of the circuit board 3. The shape of the groove 4 can match the shape of the circuit board 3.

[0058] 1000 can be installed in the flat area of ​​the car roof 6. A 1000mm sunroof opening (7), then set an 1100mm... The 1100mm starry sky cover panel includes a starry sky cover panel frame 1, a light-transmitting outer skin layer 2, a circuit board 3 and a filling layer 33 located between the two, creating a starry sky effect on the cover panel, and is installed on the skylight opening 7. Specifically, the middle 1000mm of the starry sky cover panel frame 1... A 1000mm area can be configured with 30 grooves 4, each 1000mm long, 10mm wide, and 1mm deep, with 10 grooves set at one end. A 2mm elongated hole is used. Each groove 4 houses a circuit board 3 with a length of 1000mm, a width of 10mm, and a thickness of 1mm. The circuit board 3 can be a flexible circuit board. The end of the light strip formed by the circuit board 3 passes through the elongated hole to connect to the controller via a wiring harness from the back. Circuitry is arranged on the 10mm wide flexible circuit board 3, and Mini LED light-emitting elements 31, driver chips, and other electronic components 32 are mounted. Thirty Mini LEDs are arranged on the 1000mm long circuit board 3. A filler layer 33 is then applied to the surface of the circuit board 3, making the overall thickness of the circuit board 3 approximately 1mm. To facilitate the installation of various electronic components 32, a 1000mm long circuit board can be used. Ten of these circuit boards 3 are arranged on a 300mm circuit board. After the electronic components are assembled, they are cut and reused. This not only saves material on the circuit board 3, but also improves the production efficiency of assembling electronic components.

[0059] The above description is only a preferred embodiment of the present invention and is 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 within the protection scope of the present invention.

Claims

1. A starry sky cover for automotive interiors, characterized in that, The system includes a starry sky cover frame (1), multiple circuit boards (3) disposed on the occupant side of the starry sky cover frame (1), and a light-transmitting skin layer (2) covering the surfaces of the starry sky cover frame (1) and the circuit boards (3). The circuit boards (3) are strip-shaped and are either flexible or rigid circuit boards. Multiple LED light-emitting elements (31) are provided on the circuit boards (3), and the LED light-emitting elements (31) are Mini LEDs. The system also includes a filling layer (33) disposed on the back of the light-transmitting skin layer (2). The filling layer (33) is disposed on the surface of the circuit board (3) or the filling layer (33) is disposed on the surfaces of the starry sky cover frame (1) and the circuit board (3).

2. The automotive interior starry sky cover according to claim 1, characterized in that, The circuit board (3) uses an aluminum substrate.

3. The automotive interior starry sky cover according to claim 1, characterized in that, When the filling layer (33) is disposed on the surface of the circuit board (3), the light-transmitting skin layer (2) is connected to the starry sky cover frame (1) by an adhesive, or the light-transmitting skin layer (2) is connected to the starry sky cover frame (1) and the filling layer (33) by an adhesive. When the filling layer (33) is disposed on the surface of the starry sky cover frame (1) and the circuit board (3), the light-transmitting skin layer (2) is bonded to the starry sky cover frame (1) and the circuit board (3) through the filling layer (33), or the light-transmitting skin layer (2) is connected to the filling layer (33) by an adhesive.

4. The automotive interior starry sky cover according to claim 1, characterized in that, The strip shape of the circuit board (3) can be straight, curved, broken, or tree-shaped.

5. The automotive interior starry sky cover according to claim 1, characterized in that, The starry sky cover frame (1) is provided with multiple grooves (4), and the circuit board (3) is installed in the grooves (4).

6. The automotive interior starry sky cover according to any one of claims 1-5, characterized in that, The starry sky cover frame (1) is provided with a through hole (5), and one end of the circuit board (3) or the wire harness connected to the circuit board (3) can pass through the through hole (5) and connect to the controller located on the back of the starry sky cover frame (1).

7. The automotive interior starry sky cover according to any one of claims 1-5, characterized in that, The end of the circuit board (3) extends to the edge of the starry sky cover frame (1) and wraps around to the back of the starry sky cover frame (1) to connect with the controller located on the back of the starry sky cover frame (1).

8. The automotive interior starry sky cover according to any one of claims 1-5, characterized in that, The LED light-emitting element (31) is disposed on the front side of the circuit board (3) near the light-transmitting skin layer (2).

9. The automotive interior starry sky cover according to any one of claims 1-5, characterized in that, The LED light-emitting element (31) is disposed on the back side of the circuit board (3) away from the light-transmitting skin layer (2). The LED light-emitting element (31) is provided with a focusing lens, and the circuit board (3) is provided with a light-transmitting hole for the light of the LED light-emitting element (31) to pass through.

10. A car roof, characterized in that, Including the automotive interior starry sky cover as described in any one of claims 1-5, wherein the automotive roof is provided with a sunroof opening (7), and the automotive interior starry sky cover is correspondingly disposed at the sunroof opening (7) and covers the sunroof opening (7).

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