Automobile sun shield with rhythm atmosphere lamp
By using RGB LED lights and light guide structures on the car sun visor, combined with a light control circuit, a rhythmic ambient light with changeable colors has been achieved, solving the problem of the monotony of existing ambient lights and improving the user experience and in-car atmosphere.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI DAIMAY AUTOMOTIVE INTERIOR
- Filing Date
- 2025-05-16
- Publication Date
- 2026-05-12
AI Technical Summary
Existing car ambient lighting has fixed colors, making it difficult to meet users' needs for diverse in-car environments.
It adopts RGB LED lights combined with light guide structure and light control circuit, and controls the color and brightness of the light source in real time through the vehicle's large screen to achieve a rhythmic effect of single-color gradient or multi-color alternation.
It offers a variety of lighting effects, enhancing the riding experience, increasing the sense of technology and atmosphere inside the car, and its compact structure does not take up extra space.
Smart Images
Figure CN224224980U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of automotive sun visors, and more particularly to an automotive sun visor with rhythmic ambient lighting. Background Technology
[0002] During daily driving, car sun visors primarily serve to shield drivers and passengers from sunlight, and often integrate vanity mirrors and localized lighting modules, meeting basic user needs. However, with the development of intelligent and personalized automotive trends, users' demands for driving and passenger comfort are constantly increasing, and the functionality and aesthetics of car interior components are receiving more and more attention.
[0003] Currently, adding ambient lighting systems to car interiors to enhance the technological feel and ambiance of the cabin has become a popular choice for many car owners. However, most existing ambient lights offer fixed and unique colors, making it difficult to meet users' diverse needs for in-car environments. Utility Model Content
[0004] In order to provide an ambient light for a car sun visor with changeable color, this application provides a car sun visor with rhythmic ambient light.
[0005] This application provides a car sun visor with rhythmic ambient lighting, which adopts the following technical solution:
[0006] A car sun visor with rhythmic ambient lighting, comprising a main frame, and also including:
[0007] The light source is an RGB LED light;
[0008] A light guide structure is installed on the three sides of the main frame, excluding the pivot. The light emitted by the light source is transmitted and refracted through the light guide structure before being transmitted out.
[0009] The lighting control circuit is installed in the main frame and electrically connected to the light source. The lighting control circuit is also electrically connected to the vehicle's large screen and is used to provide power and control signals.
[0010] By adopting the above technical solution, the light guide structure is installed on the three sides of the main frame except for the pivot, which is compact and does not occupy extra space. The lighting control circuit provides power and control signals. The RGB LED lights can present different colors according to the brightness of the three RGB chips. The lighting control circuit adjusts the color and brightness of the RGB LED lights to present a single color gradient breathing effect with different brightness, or a multi-color alternating breathing effect by switching between different colors to achieve a rhythmic effect. The light source is refracted in multiple directions through the light guide structure to form multiple beams of light, which are then transmitted through the light, so that the light is evenly distributed along the edge of the main frame, which helps to improve the riding experience.
[0011] Optionally, the light guide structure includes a diffusion section, a light guide section, and a fixing section. The fixing section is integrally injection molded with the light guide section. The end of the fixing section away from the light guide section is connected to the main frame. The diffusion section is injection molded at the end of the light guide section away from the fixing section. There are two RGB LED lights. The two RGB LED lights are respectively installed at both ends of the light guide section. The light is conducted through the light guide section and then scattered and transmitted through the diffusion section.
[0012] By adopting the above technical solution, light enters the light guide for conduction, and then is scattered by the diffusion part before passing through, presenting a soft and uniform light effect. Both ends of the light guide are equipped with RGB LED lights, and the light shines from both ends of the light guide and finally converges, avoiding the intensity of the light source on one side gradually weakening as the conduction distance increases, making the distribution of light source brightness more uniform. The injection molding method has high structural precision, good repeatability, and is suitable for mass production.
[0013] Optionally, the light source is not oriented directly towards the other three edges of the main frame, excluding the pivot.
[0014] By adopting the above technical solutions, the effect of point light sources can be further reduced, making the overall rhythmic ambient lighting effect more uniform and softer.
[0015] Optionally, the end of the light guide portion away from the diffusion portion is provided with a plurality of reflective inclined surfaces, which are used to reflect light.
[0016] By adopting the above technical solution, the reflective slope can change the reflection direction and intensity distribution of light, resulting in a more uniform light effect.
[0017] Optionally, multiple fixing parts are provided, and the multiple fixing parts are evenly spaced along the length direction of the light guide.
[0018] By adopting the above technical solution, multiple fixing parts make the connection between the light guide part and the main frame more secure, and improve the connection stability between the light guide structure and the main frame.
[0019] Optionally, the light guide structure includes a diffusion section, a light guide section, a fixing section, and a support section. The fixing section connects the support section to the main frame. The diffusion section surrounds the light guide section and is attached to the end of the support section away from the fixing section. Two RGB LED lights are provided, and the two RGB LED lights are respectively installed at both ends of the light guide section. The light is conducted through the light guide section and then scattered and transmitted through the diffusion section. The support section can receive the light conducted by the light guide section and reflect it into the light guide section.
[0020] By adopting the above technical solution, the light of the RGB LED light enters from both ends of the light guide and finally converges. The light is transmitted through the light guide and then further scattered by the diffusion part, eliminating the point light source feeling. The further reflection of the support part can make the light distribution more uniform, and finally achieve a soft light emission effect. The structure is simple, fewer molds are used, and the cost is low.
[0021] Optionally, multiple RGB LEDs are provided, and the multiple RGB LEDs are electrically connected to a flexible PCB board at even intervals. The lighting control circuit is electrically connected to the flexible PCB board.
[0022] By adopting the above technical solution, multiple RGB LED lights are connected to a flexible PCB board to form an LED light strip. The RGB LED lights on the flexible PCB board are controlled by the vehicle's large screen, so that each RGB LED light can present different colors and brightness. Thus, the rhythmic ambient light can present a breathing effect with multiple color brightness changes, or a dynamic effect of different colors flowing together, providing a more immersive, interactive, and atmospheric experience.
[0023] Optionally, the light guide structure includes a light guide part, a mounting part, a fixing part, and a reflective part. The fixing part connects the light guide part to the main frame. The mounting part is vertically mounted on one end of the light guide part near the fixing part. The light source is mounted on the inner sidewall of the mounting part. The reflective part wraps around the periphery of the mounting part. The light is conducted through the mounting part, reflected by the reflective part, and then transmitted through the light guide part.
[0024] By adopting the above technical solution, the light is transmitted through the mounting part and reflected by the reflection part on the inner wall of the flexible PCB board containing multiple RGB LED lights, and then passes through the light guide part, which can reduce the point light source feeling and present a softer effect.
[0025] Optionally, the lighting control circuit includes a power signal conversion module, a first circuit board, and a second circuit board that are electrically connected. The power signal conversion module is electrically connected to the vehicle's large screen, the first circuit board is electrically connected to the light source, and the second circuit board is used to electrically connect to the mirror frame LED beads in the car's sun visor.
[0026] By adopting the above technical solution, the vehicle's large screen can send power signals and control signals to the power signal conversion module. After receiving the power signals and control signals, the power signal conversion module can supply power to the first circuit board and the second circuit board, and transmit control signals to the first circuit board and the second circuit board. After receiving the control signals, the first circuit board and the second circuit board can control the light source.
[0027] Optionally, the lighting control circuit includes a first circuit board and a second circuit board. The first circuit board is electrically connected to the light source, and the second circuit board is electrically connected to the mirror frame LED in the sun visor of the car. The first circuit board and the second circuit board are respectively electrically connected to the vehicle's large screen.
[0028] By adopting the above technical solution, the first circuit board and the second circuit board are electrically connected to the vehicle's large screen, and the vehicle's large screen can respectively supply power to the first circuit board and the second circuit board and transmit control signals.
[0029] In summary, this application includes at least one of the following beneficial technical effects:
[0030] 1. Depending on the requirements, the light source can be a single RGB LED light, combined with the corresponding light guide structure (injection molding or soft adhesive) to present a single color changing different brightness to present a single color gradient breathing effect, or different colors switching to present a multi-color alternating breathing effect; or multiple RGB LED lights can be selected to form an LED light strip, combined with the corresponding light guide structure to present a breathing effect of changing brightness in multiple colors, or a dynamic marquee effect of different colors flowing together.
[0031] 2. The light guide structure is installed on the three sides of the main frame except for the pivot, which is compact and does not take up extra space. The light source is refracted in multiple directions through the light guide structure to form multiple beams of light, which are then transmitted out, so that the light is evenly distributed along the edge of the main frame, presenting a soft and uniform light effect, which helps to improve the riding experience.
[0032] 3. Power and control signals are provided to the lighting control circuit through the vehicle's large screen, adjusting brightness and color in real time, following the rhythm of music or the selection of in-vehicle modes, and working together with other ambient lights in the car interior to provide a more comfortable interactive experience. Attached Figure Description
[0033] Figure 1 This is a schematic diagram of the overall structure of this application;
[0034] Figure 2 This is a structural diagram of the present application with the main skeleton removed;
[0035] Figure 3 This is a cross-sectional view of the light guide structure of Embodiment 1 of this application;
[0036] Figure 4 This is a cross-sectional view of the light guide structure of Embodiment 2 of this application;
[0037] Figure 5 This is a cross-sectional view of the light guide structure of Embodiment 3 of this application when the LED light strip is installed on the inner side wall of the mounting part near the main frame;
[0038] Figure 6 This is a cross-sectional view of the light guide structure of Embodiment 3 of this application when the LED light strip is installed on the inner side wall of the mounting part away from the main frame.
[0039] Reference numerals: 1. Main frame; 2. Light source; 3. Light guide structure; 31. Diffusion part; 32. Light guide part; 321. Reflecting slope; 33. Fixing part; 34. Supporting part; 35. Mounting part; 36. Reflecting part; 4. Lighting control circuit; 41. Power signal conversion module; 42. First circuit board; 43. Second circuit board. Detailed Implementation
[0040] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.
[0041] Example 1
[0042] Embodiment 1 of this application discloses a car sun visor with rhythmic ambient lighting, referring to... Figure 1 and Figure 2 It includes a main frame 1, a light source 2, a light guide structure 3, and a lighting control circuit 4. The light guide structure 3 is installed on the three sides of the main frame 1 except for the pivot. The light source 2 is installed in the main frame 1. The light emitted by the light source 2 is transmitted and refracted through the light guide structure 3 and then passes through. The lighting control circuit 4 is installed in the main frame 1 and electrically connected to the light source 2 to provide power and control signals.
[0043] Reference Figure 2 and Figure 3 The light guide structure 3 includes a diffusion section 31, a light guide section 32, and a fixing section 33. The light guide section 32 is disposed on the three sides of the main frame 1, excluding the pivot. The diffusion section 31 is fixedly connected to the end of the light guide section 32 away from the main frame 1. The fixing section 33 is integrally formed on the end of the light guide section 32 near the main frame 1, and the end of the fixing section 33 away from the light guide section 32 is connected to the main frame 1. Multiple fixing sections 33 are provided, and the multiple fixing sections 33 are evenly spaced along the length direction of the light guide section 32. In this embodiment, the light guide section 32 and the main frame 1 are connected by hot riveting welding; in other embodiments, the fixing section 33 and the main frame 1 can also be connected by bolts or clips.
[0044] The light emitted by the light source 2 is conducted through the light guide 32 and then scattered in multiple directions by the diffusion part 31, reducing the local brightness difference and forming an ambient light effect that is evenly distributed along the edge of the main frame 1.
[0045] In order to make the light diffuse more evenly in the light guide 32, a plurality of reflective slopes 321 are provided at the end of the light guide 32 away from the diffusion part 31. The plurality of reflective slopes 321 are arranged in sequence along the length of the light guide 32 to form a sawtooth shape. When the light is incident on the reflective slopes 321, the reflective slopes 321 reflect the light into the light guide 32, and then the light is scattered in multiple directions by the diffusion part 31, which not only maintains the brightness of the light, but also achieves a uniform, soft and beautiful ambient lighting effect.
[0046] In this embodiment, the light guide part 32 and the fixing part 33 are made of optical grade PC (polycarbonate) or PMMA (polymethyl methacrylate) and are connected by integral injection molding; the diffusion part 31 is made of diffusion grade PC or PMMA and is covered on the surface of the light guide part 32 by secondary injection molding.
[0047] The lighting control circuit 4 includes a power signal conversion module 41, a first circuit board 42, and a second circuit board 43 that are electrically connected. The power signal conversion module 41 is connected to the vehicle's large screen via a LIN line. The vehicle's large screen provides power and control signals to the first circuit board 42 and the second circuit board 43 through the power signal conversion module 41. The first circuit board 42 is electrically connected to the light source 2, and the second circuit board 43 is used to electrically connect to the mirror frame LEDs in the sun visor of the car.
[0048] The vehicle's large screen can send power signals and control signals to the power signal conversion module 41. Upon receiving these signals, the module can supply power to the first circuit board 42 and the second circuit board 43, respectively, and also transmit control signals to both. The first circuit board 42, upon receiving the control signal, controls the light source 2. The second circuit board 43, upon receiving the control signal, controls the mirror frame LEDs in the sun visor. In other embodiments, the lighting control circuit 4 may not include the power signal conversion module 41; instead, the first circuit board 42 and the second circuit board 43 can be directly connected to the vehicle's large screen via LIN lines to achieve power supply and signal control.
[0049] Light source 2 uses RGB LEDs. Each RGB LED consists of three chips: red (R), green (G), and blue (B). The brightness of the three RGB chips is controlled by the vehicle's large screen to present different colors, allowing the rhythmic ambient light to change colors. The rhythmic ambient light can change the brightness of a single color to present a single-color gradient breathing effect, or switch between different colors to present a multi-color alternating breathing effect, creating a more immersive, interactive, and atmospheric experience.
[0050] Two RGB LED lights are provided, and two circuit boards 42 are also provided. The two RGB LED lights are respectively installed at both ends of the light guide 32, so that the two RGB LED lights can simultaneously transmit light from both ends of the light guide 32 to converge, avoiding the intensity of the single-sided light source 2 gradually weakening as the transmission distance increases, which would cause uneven light distribution in the rhythmic ambient light. In addition, the RGB LED lights are not directly facing the three edges of the main frame 1 other than the pivot, so that the light emitted by the RGB LED lights will not shine directly on the light guide structure 3. The light of the rhythmic ambient light is transmitted through the light guide 32 and diffused through the diffusion part 31 before passing through, which can reduce the point light source feeling and make the light effect more uniform and softer.
[0051] The ambient lighting on the car sun visor can adjust its brightness and color in real time with the car's infotainment screen, following the rhythm of music or the selection of in-car modes. It works in conjunction with other ambient lights in the car interior to provide a more comfortable interactive experience.
[0052] The implementation principle of the car sun visor with rhythmic ambient light disclosed in Embodiment 1 of this application is as follows: The car screen provides power and control signals to the first circuit board 42 through the power signal conversion module 41, and controls the RGB LED lights to adjust the brightness and switch colors in real time, so as to realize that a single color changes different brightness to present a monochrome gradient breathing effect, or different colors switch to each other to present a multi-color alternating breathing effect; the light emitted by the RGB LED lights enters the light guide 32 for conduction, and then is scattered in multiple directions through the diffusion part 31 to form ambient light lines evenly distributed along the edge of the main frame 1.
[0053] Example 2
[0054] The difference between this embodiment and Embodiment 1 is that:
[0055] Reference Figure 2 and Figure 4 The light guide structure 3 includes a diffusion section 31, a light guide section 32, a fixing section 33, and a support section 34. The support section 34 is fixedly installed on the three sides of the main frame 1, excluding the pivot. The diffusion section 31 surrounds the light guide section 32 and is attached to the end of the support section 34 away from the main frame 1. One end of the fixing section 33 is integrally connected to the support section 34, and the other end is connected to the main frame 1. Multiple fixing sections 33 are provided and are evenly spaced along the length of the light guide section 32. In this embodiment, the light guide section 32 and the main frame 1 are connected by hot riveting welding; in other embodiments, the fixing section 33 and the main frame 1 can also be connected by bolts or clips.
[0056] The light emitted by the light source 2 is guided by the light guide 32, and then further scattered and transmitted in multiple directions by the diffusion part 31. The support part 34 can reflect the light, ensuring the brightness of the transmitted light, while forming a softer and more uniform light effect.
[0057] In this embodiment, the light guide 32 is made of glass cladding wrapped around multiple glass fiber cores. In other embodiments, it can also be made of acrylic resin (PMMA-like), polyurethane, polystyrene, polyolefin elastomer, or polyvinyl chloride. The diffusion part 31 is made of polyolefin elastomer. In other embodiments, it can also be made of fluorocarbon resin, polytetrafluoroethylene, polyurethane, polystyrene, or polyvinyl chloride. The fixing part 33 and the supporting part 34 are made of opaque hard plastic materials such as PC ABS, ABS, ASA, PCASA, and PA. When the light guide structure is made of the above materials, the requirements for the production mold are lower, which helps to reduce production costs.
[0058] The implementation principle of the car sun visor with rhythmic ambient light disclosed in Embodiment 2 of this application is as follows: The car screen provides power and control signals to the first circuit board 42 through the power signal conversion module 41, and controls the RGB LED lights to adjust the brightness and switch colors in real time, so as to achieve a single color changing different brightness to present a monochrome gradient breathing effect, or different colors switching to each other to present a multi-color alternating breathing effect; the light emitted by the RGB LED lights enters the light guide part 32 for conduction, and then is scattered in multiple directions through the diffusion part 31. The support part 34 can reflect the light to the diffusion part 31 to form ambient light lines evenly distributed along the edge of the main frame 1.
[0059] Example 3
[0060] The difference between this embodiment and Embodiment 1 is that:
[0061] Reference Figure 2 and Figure 5The light guide structure 3 includes a light guide portion 32, a mounting portion 35, a fixing portion 33, and a reflective portion 36. The light guide portion 32 is fixedly mounted on the three sides of the main frame 1, excluding the pivot. The light source 2 is mounted in the mounting portion 35. The mounting portion 35 is vertically and integrally connected to the end of the light guide portion 32 near the main frame 1, forming an L-shaped structure with the light guide portion 32. The reflective portion 36 surrounds the periphery of the mounting portion 35 and reflects the light emitted by the light source 2, ensuring that all light emitted by the point light source 2 is reflected by the reflective portion 36 into the mounting portion 35, and then passes through the end of the light guide portion 32 away from the main frame 1, thus ensuring the uniformity of the light and preventing light leakage. The fixing portion 33 is integrally connected to the end of the light guide portion 32 near the main frame 1, and the end of the fixing portion 33 away from the light guide portion 32 passes through the reflective portion 36 and connects to the main frame 1. Multiple fixing portions 33 are provided, and the multiple fixing portions 33 are evenly spaced along the length direction of the light guide portion 32.
[0062] In this embodiment, the light guide 32 is connected to the main frame 1 by hot riveting welding; in other embodiments, the fixing part 33 can also be connected to the main frame 1 by bolts or clips. The light guide 32, the mounting part 35 and the fixing part 33 are all made of optical grade PC (polycarbonate) or PMMA (polymethyl methacrylate) and are connected by integral injection molding.
[0063] Light source 2 uses multiple RGB LEDs, which are electrically connected at even intervals on a flexible PCB board to form an LED light strip. The flexible PCB board is electrically connected to the first circuit board 42. The LED light strip is mounted on the inner wall of the mounting part 35 near the main frame 1. In other embodiments, refer to... Figure 6 LED light strips can also be installed on the inner wall of the mounting part 35, away from the main frame 1.
[0064] By controlling the RGB LEDs on the flexible PCB board via the vehicle's large screen, each RGB LED can display different colors and brightness levels. This allows the ambient lighting to present a breathing effect with varying color brightness, or a dynamic marquee effect with different colors flowing together, providing a more immersive, interactive, and atmospheric experience. In this embodiment, there are 70 RGB LEDs, each spaced 1cm apart.
[0065] The implementation principle of the car sun visor with rhythmic ambient lighting disclosed in Embodiment 3 of this application is as follows:
[0066] The vehicle's large screen provides power and control signals to the first circuit board 42 through the power signal conversion module 41, and controls the brightness and color of the LED light strip in real time, presenting a breathing effect with various color brightness changes, or a dynamic effect of different colors flowing together; the light emitted by each RGB LED in the LED light strip is conducted through the mounting part 35, then reflected by the reflector 36, and then transmitted through the light guide part 32 to emit uniform light.
[0067] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A car sun visor with rhythmic ambient lighting, comprising a main frame (1), characterized in that, Also includes: Light source (2), wherein the light source (2) is an RGB LED light; The light guide structure (3) is installed on the three sides of the main frame (1) except for the pivot. The light emitted by the light source (2) is transmitted and refracted through the light guide structure (3) and then passes through. The lighting control circuit (4) is installed in the main frame (1) and electrically connected to the light source (2). The lighting control circuit (4) is electrically connected to the vehicle's large screen. The lighting control circuit (4) is used to provide power and control signals.
2. A car sun visor with rhythmic ambient lighting according to claim 1, characterized in that, The light guide structure (3) includes a diffusion part (31), a light guide part (32) and a fixing part (33). The fixing part (33) and the light guide part (32) are integrally injection molded. The end of the fixing part (33) away from the light guide part (32) is connected to the main frame (1). The diffusion part (31) is injection molded twice at the end of the light guide part (32) away from the fixing part (33). There are two RGB LED lights. The two RGB LED lights are respectively installed at both ends of the light guide part (32). The light is conducted through the light guide part (32) and then scattered and transmitted through the diffusion part (31).
3. A car sun visor with rhythmic ambient lighting according to claim 2, characterized in that, The light source (2) is not oriented directly towards the three sides of the main frame (1) except for the pivot.
4. A car sun visor with rhythmic ambient lighting according to claim 2, characterized in that, The light guide (32) has a plurality of reflective inclined surfaces (321) at one end away from the diffusion part (31), and the reflective inclined surfaces (321) are used to reflect light.
5. A car sun visor with rhythmic ambient lighting according to claim 2, characterized in that, The fixing part (33) is provided in multiple ways, and the multiple fixing parts (33) are evenly spaced along the length direction of the light guide part (32).
6. A car sun visor with rhythmic ambient lighting according to claim 1, characterized in that, The light guide structure (3) includes a diffusion part (31), a light guide part (32), a fixing part (33) and a support part (34). The fixing part (33) connects the support part (34) and the main frame (1). The diffusion part (31) wraps around the light guide part (32). The diffusion part (31) is attached to the end of the support part (34) away from the fixing part (33). There are two RGB LED lights. The two RGB LED lights are respectively installed at both ends of the light guide part (32). The light is conducted through the light guide part (32) and then scattered and transmitted through the diffusion part (31). The support part (34) can receive the light conducted by the light guide part (32) and reflect it into the light guide part (32).
7. A car sun visor with rhythmic ambient lighting according to claim 1, characterized in that, The RGB LED lights are provided in multiples, and the multiple RGB LED lights are electrically connected to the flexible PCB board at even intervals. The lighting control circuit (4) is electrically connected to the flexible PCB board.
8. A car sun visor with rhythmic ambient lighting according to claim 7, characterized in that, The light guide structure (3) includes a light guide part (32), a mounting part (35), a fixing part (33) and a reflective part (36). The fixing part (33) connects the light guide part (32) and the main frame (1). The mounting part (35) is vertically mounted on one end of the light guide part (32) near the fixing part (33). The light source (2) is mounted on the inner side wall of the mounting part (35). The reflective part (36) wraps around the periphery of the mounting part (35). The light is conducted through the mounting part (35), reflected by the reflective part (36), and then passes through the light guide part (32).
9. A car sun visor with rhythmic ambient lighting according to claim 1, characterized in that, The lighting control circuit (4) includes a power signal conversion module (41), a first circuit board (42), and a second circuit board (43) that are electrically connected. The power signal conversion module (41) is electrically connected to the vehicle's large screen. The first circuit board (42) is electrically connected to the light source (2). The second circuit board (43) is used to electrically connect to the mirror frame LED beads in the sun visor of the car.
10. A car sun visor with rhythmic ambient lighting according to claim 1, characterized in that, The lighting control circuit (4) includes a first circuit board (42) and a second circuit board (43). The first circuit board (42) is electrically connected to the light source (2), and the second circuit board (43) is used to electrically connect to the mirror frame lamp beads in the sun visor of the car. The first circuit board (42) and the second circuit board (43) are respectively electrically connected to the large screen of the vehicle.