Selective refraction automobile blind area indicating component based on polarization light regulation

Abstract

The utility model provides a selective refraction car blind area indication subassembly based on polarization light regulation, relate to indication subassembly technical field, including the casing, the lateral surface of casing is equipped with the threading hole, the inner wall of casing is equipped with three clamping blocks evenly, the inside of casing is equipped with the LED circuit board, the surface of LED circuit board is equipped with three through -hole, one side of casing is equipped with the wire, adopt when the car host machine detects the rear -view mirror blind area inside to have the vehicle or the pedestrian through the vehicle radar, sends the blind area instruction that brightens, sends the power to the circuit board through the wire, and brightens the LED lamp on the LED circuit board, the light of LED lamp sends through the lens and carries out the direction, make the light intensity of the light to the driver direction is the strongest, pass through the soft light cover plate again, the light of light pattern that emits on the mirror surface becomes even conspicuous to the light that emits, thereby remind the driver, the rear -view mirror blind area inside has the pedestrian or the vehicle, solved the shortcoming that the driver is difficult to provide clear and intuitive safe prompt under low energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of indicator component technology, and in particular to a selective refraction automotive blind spot indicator component based on polarization light modulation. Background Technology

[0002] In existing automotive safety assistance technologies, drivers often fail to notice oncoming vehicles or pedestrians in adjacent lanes due to blind spots in their rearview mirrors, leading to traffic accidents. Traditional solutions rely on mechanical mirror adjustments, wide-angle lenses, or electronic image-assisted display systems. However, these methods have limitations. For example, mechanical lenses have limited field of view, wide-angle lenses, while covering part of the blind spot, are prone to visual distortion, and electronic image-assisted systems, although providing real-time images of the blind spot, are highly dependent on the vehicle's electronic control system, resulting in high costs and energy consumption. Furthermore, image quality is affected under complex lighting conditions, making the alerts less intuitive. To address this, existing technologies are increasingly incorporating optical indication-based blind spot warning solutions. These solutions use LED light sources in the rearview mirror area; when an obstacle is detected in the blind spot, the light source illuminates, alerting the driver with a visual signal. However, the light beams emitted by ordinary LED light sources are prone to uneven light spots, excessive brightness, or insufficient brightness after reflection or transmission. Drivers often find it difficult to obtain clear and intuitive cues in practice. Excessively strong light can even cause glare, affecting driving safety, while insufficient light results in ineffective warnings. Therefore, how to rationally control the light emitted by LEDs while ensuring low energy consumption and high reliability, so that the light signal has sufficient brightness, remains uniform and soft, and forms an optimal light intensity distribution in the driver's line of sight, has become a pressing technical challenge in this field. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies that struggle to provide drivers with clear, intuitive, and safe guidance under low energy consumption, and to propose a selective refraction blind spot indicator component based on polarization light modulation.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a selective refraction automotive blind spot indicator component based on polarization light modulation, comprising a housing, a wire hole on the side of the housing, three evenly spaced clips on the inner wall of the housing, an LED circuit board inside the housing, three through holes on the surface of the LED circuit board, a wire on one side of the housing, a connector at one end of the wire, a lens on the top of the LED circuit board, three slots on the bottom surface of the lens, a fixing post at the bottom of each of the three slots, a diffuser cover on the top of the lens, and adhesive tape on the surface of the diffuser cover.

[0005] Preferably, the three latches on the inner wall of the housing are integrally formed with the housing, and the three latches are arranged in a triangular shape on the inner wall of the housing.

[0006] Preferably, the three fixing posts are arranged in a triangular shape on the inner surface of the shell, and the fixing posts are integrally formed with the shell.

[0007] Preferably, the LED circuit board is installed inside the housing, and the LED circuit board is snapped into the housing by three clips. The positions of the through holes on the surface of the LED circuit board correspond one-to-one with the positions of the fixing posts, and the tops of the three fixing posts all have through holes.

[0008] Preferably, the positions of the slots on the bottom surface of the lens correspond one-to-one with the positions of the fixing posts, and the ends of the three fixing posts with through holes are all installed into the slots on the bottom surface of the lens, and the lens is engaged with the three fixing posts.

[0009] Preferably, the diffuser cover is installed inside the housing and is bonded to the housing. The tape is placed on the surface of the diffuser cover away from the lens and is bonded to the diffuser cover.

[0010] Preferably, one end of the wire is installed into the interior of the housing through a through-hole and soldered to the LED circuit board, and the other end of the wire is crimped with a connector screw.

[0011] Beneficial effects

[0012] In this invention, when the car's main unit detects a vehicle or pedestrian in the blind spot of the rearview mirror via its onboard radar while the car is in motion, it issues a command to illuminate the blind spot. Power is then sent to the circuit board via wires, illuminating the LED lights on the LED circuit board. The light emitted by the LED lights is guided by a lens to maximize the light intensity directed towards the driver. The light is then softened by a diffuser cover, making the light emitted by the luminous pattern on the mirror surface more uniform and noticeable. This alerts the driver to the presence of a pedestrian or vehicle in the blind spot of the rearview mirror, thus solving the problem of providing a clear, intuitive, and safe warning to the driver with low energy consumption. Attached Figure Description

[0013] Figure 1 This is an isometric drawing of the present invention;

[0014] Figure 2 This is a perspective view of the present utility model;

[0015] Figure 3 This is a first exploded view of the present invention;

[0016] Figure 4 This is the second exploded view of the present invention.

[0017] Legend:

[0018] 1. Housing; 2. LED circuit board; 3. Wire; 4. Connector; 5. Lens; 6. Soft light cover; 7. Tape; 8. Clip; 9. Wire hole; 10. Fixing post; 11. Through hole; 12. Slot. Detailed Implementation

[0019] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation plan without creative effort are all within the protection scope of this utility model.

[0020] The specific embodiments of this utility model are described below with reference to the accompanying drawings. Specific Implementation Example 1:

[0022] Reference Figure 1-4 A selective refraction blind spot indicator component for automobiles based on polarization light modulation includes a housing 1. The housing 1 has a wire hole 9 on its side. Three locking blocks 8 are evenly distributed on the inner wall of the housing 1. An LED circuit board 2 is located inside the housing 1. Three through holes 11 are located on the surface of the LED circuit board 2. A wire 3 is located on one side of the housing 1, with a connector 4 at one end of the wire 3. A lens 5 is located on the top of the LED circuit board 2. Three slots 12 are located on the bottom of the lens 5. A fixing post 10 is located at the bottom of each of the three slots 12. A diffuser cover 6 is located on the top of the lens 5. Adhesive tape 7 is distributed on the surface of the diffuser cover 6. The three locking blocks 8 on the inner wall of the housing 1 are integrally formed with the housing 1 and are arranged in a triangular shape on the inner wall of the housing 1. The three fixing posts 10 are arranged in a triangular shape on the inner surface of the housing 1 and are also integrally formed with the housing 1. The LED circuit board 2 is installed inside the housing 1, and the LED circuit board 2 is snapped into the housing 1 by three clips 8. The positions of the through holes 11 on the surface of the LED circuit board 2 correspond one-to-one with the positions of the fixing posts 10. The tops of the three fixing posts 10 all penetrate through the through holes 11. The positions of the slots 12 on the bottom surface of the lens 5 correspond one-to-one with the positions of the fixing posts 10, and the tops of the three fixing posts 10 that penetrate through the through holes 11 are all installed into the slots 12 on the bottom surface of the lens 5. The lens 5 is snapped into the three fixing posts 10. The diffuser cover 6 is installed inside the housing 1, and the diffuser cover 6 is bonded to the housing 1. The tape 7 is placed on the surface of the diffuser cover 6 away from the lens 5, and the tape 7 is bonded to the diffuser cover 6. One end of the wire 3 is installed into the inside of the housing 1 through the wire hole 9 and soldered to the LED circuit board 2. The other end of the wire 3 is screwed into the connector 4.

[0023] The housing 1 is a sealed outer shell for the entire assembly. It is injection molded from engineering plastic to balance strength and forming precision. The wire hole 9 on its side, together with the rubber sealing ring, provides a channel for the wire 3 to enter, forming a seal and releasing stress. Three locking blocks 8 integrally formed on the inner wall of the housing 1 are arranged in a triangle to precisely lock the LED circuit board 2. The geometric position of the locking blocks 8 ensures that the plane of the LED circuit board 2 is concentric with the optical axis of the subsequent optical components. Three fixing posts 10 set inside the housing 1 form a positioning reference that cooperates with the locking blocks 8. The top of the fixing post 10 passes through the through hole 11 of the LED circuit board 2 and is inserted into the slot 12 on the bottom surface of the lens 5, so that the lens 5 and the LED circuit board 2 are rigidly coupled in the axial and angular directions. The fixing post 10 also restricts and fixes the displacement of the lens 5. LED circuit board 2 serves as the platform for the light source and driving electronics. It employs a copper foil layer and thermal vias for heat dissipation. The LED circuit board 2 houses a high-brightness LED chip array, a constant current driver or shunt current limiting circuit, reverse connection protection and transient suppression components, temperature detection components, and status indication circuits. Through-hole 11 provides a channel for the fixing post 10 while simultaneously achieving mechanical positioning. Wire 3 enters the housing 1 through the through-hole 9 and is reliably soldered to the power pad of the LED circuit board 2. The other end of the wire 3 is screwed into connector 4, which connects to the vehicle's power and control signal interfaces. Connector 4 typically includes a positive power terminal, a ground wire, and a control signal line. The control signal line carries the lighting command from the vehicle's radar control unit or body control unit. Lens 5 uses a design combining a freeform surface and a microprism array to achieve directional refraction of the LED's divergent light. The slot 12 on the bottom of lens 5, in conjunction with the fixing post 10, ensures that the optical center of each LED light source is precisely aligned with the optical center of lens 5 after installation, thereby forming a predetermined light intensity distribution in the emission direction. Selective refraction based on polarization control is achieved by laminating a polarization-selective film onto the surface of lens 5. This polarization layer selectively transmits and absorbs the polarization state of the incident light, allowing the component of light with polarization matching the driver's line of sight to be refracted efficiently in lens 5, forming a strong directional beam. Components with mismatched polarization are attenuated or scattered, thus significantly improving signal contrast in the driver's direction and suppressing lateral leakage interference with the surrounding environment. The diffuser cover 6, as the final light-emitting interface, performs sealing, anti-glare, and homogenization functions. Its surface has a micro-scattering structure that smooths the light field focused by lens 5 through multiple small-angle scattering and microstructure interference, presenting a uniform and striking light-emitting pattern. Simultaneously, the diffuser cover 6 is bonded to the rearview mirror lens via adhesive tape 7.

[0024] In practical use, the card block 8 makes the geometric center of the LED circuit board 2 coaxial with the optical center of the lens 5. The fixing post 10 passes through the through hole 11 and is inserted into the slot 12 of the lens 5 to form an integrated assembly reference for optics and mechanics. The sealed fit between the wire 3 and the through hole 9 ensures the reliability and protection level of the electrical connection. The lens 5 and the polarization selective film work together to achieve a light emission field with strong directionality and low leakage. The soft light cover plate 6 performs the final uniformization and anti-glare treatment on the light emission field. At the same time, the drive and protection circuits on the LED circuit board 2 perform closed-loop management of the light source output to ensure stable light intensity and optimal power utilization under different voltage conditions. In practical use, after the vehicle radar detects a target in the blind spot, the body control unit outputs a trigger signal to the connector 4. The trigger signal is transmitted to the control interface of the LED circuit board 2 through the wire 3 connected to the connector 4. The control interface drives the constant current driver or power MOSFET switch to make the power supply from the vehicle battery pass through the reverse protection element and transient suppressor, and then be stably output to the LED array by the constant current source. The driver can use PWM modulation to control transient brightness, achieve soft start and reduce current surge. During the lighting process, the driver outputs status feedback for the body control unit to record. After receiving a stable current, the LED chips on the LED circuit board 2 emit unpolarized or weakly polarized divergent light. The light first passes through the microstructure of the lens 5 and is refracted and focused at the designed angle. After passing through the polarization selection film, only the polarization matching component maintains high transmittance and continues to propagate towards the driver along the designed light path. Then, the light is homogenized by the micro-scattering surface of the diffuser cover 6 and finally appears on the rearview mirror surface as a high-contrast and uniform light-emitting pattern, visually reminding the driver that there is a target in the blind spot. Specific Implementation Example 2:

[0026] Reference Figure 1-4The selective refraction automotive blind spot indicator component based on polarization light modulation is further based on the basic structure in Specific Embodiment 1. The overall workflow starts from the vehicle starting and entering the driving state. The vehicle radar system continuously scans the surrounding environment of the vehicle and monitors the blind spots of the left and right rearview mirrors in real time. After the radar sensor collects the distance, speed and orientation information of the target object, it transmits the detection results to the vehicle control unit. The control unit analyzes and judges the data according to the set blind spot detection algorithm. When it is confirmed that there is a vehicle or pedestrian in the blind spot, the control unit generates a lighting command and transmits the control signal to the connector 4 of the blind spot indicator component through the vehicle power bus. The connector 4 is reliably connected to the wire 3 by screw crimping. The wire 3 transmits the control signal to the control interface of the LED circuit board 2. After receiving the signal, the control interface triggers the constant current driver or power MOSFET switch to turn on, so that the power from the vehicle battery is input into the constant current source through the reverse protection element and transient suppressor. The constant current source stably outputs current to the high brightness LED chip array. At the same time, the driver controls the transient brightness through PWM modulation to ensure soft start of LED lighting. Under the influence of a stable current, the LED chip emits unpolarized or weakly polarized divergent light. The light first reaches the bottom surface of lens 5. Lens 5 uses a freeform surface and a microprism array to directionally refract and converge the divergent light, ensuring that the optical center of each LED light source is coaxial with the optical center of lens 5 and forms a designed light intensity distribution. The polarization selective film laminated on the surface of lens 5 regulates the polarization state of the light, ensuring that the light component whose polarization matches the driver's line of sight has high transmittance and is emitted in a predetermined direction, while the mismatched component is attenuated or scattered, thereby enhancing directionality and signal contrast, suppressing lateral leakage, and improving the visibility of blind spot warnings and environmental safety. The refracted beam continues to propagate to the diffuser cover 6. The micro-scattering structure on the surface of the diffuser cover 6 homogenizes and softens the light, smoothing the light field through multiple small-angle scattering and microstructure interference, so that the emitted light forms a uniform and eye-catching luminous pattern. At the same time, the diffuser cover 6 is fixed to the rearview mirror lens with tape 7, taking into account sealing, anti-glare, and structural stability.

[0027] In summary:

[0028] 1. When the car is in motion, if the car's main unit detects a vehicle or pedestrian in the blind spot of the rearview mirror via the vehicle radar, it issues a command to illuminate the blind spot. Power is sent to the circuit board through wire 3, illuminating the LED lights on the LED circuit board 2. The light emitted by the LED lights is guided by lens 5 to maximize the light intensity directed towards the driver. Then, the light is softened by a diffuser cover 6, making the light emitted by the luminous pattern on the mirror surface more uniform and eye-catching, thereby reminding the driver that there is a pedestrian or vehicle in the blind spot of the rearview mirror. This solves the problem of not being able to provide the driver with clear, intuitive, and safe prompts with low energy consumption.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A selective refraction automotive blind spot indicator component based on polarization-controlled light, comprising a housing (1), characterized in that: The housing (1) has a wire hole (9) on its side and three clips (8) are evenly distributed on the inner wall of the housing (1). The housing (1) has an LED circuit board (2) inside and three through holes (11) on the surface of the LED circuit board (2). The housing (1) has a wire (3) on one side and a connector (4) at one end of the wire (3). The LED circuit board (2) has a lens (5) on its top and three slots (12) on the bottom surface of the lens (5). Each of the three slots (12) has a fixing post (10) at its bottom. The lens (5) has a soft light cover plate (6) on its top and tape (7) on the surface of the soft light cover plate (6).

2. The selective refraction automotive blind spot indicator component based on polarization light modulation according to claim 1, characterized in that: The three locking blocks (8) set on the inner wall of the shell (1) are integrally formed with the shell (1), and the three locking blocks (8) are set on the inner wall of the shell (1) in a triangular shape.

3. The selective refraction automotive blind spot indicator component based on polarization light modulation according to claim 1, characterized in that: The three fixing posts (10) are arranged in a triangular shape on the surface inside the shell (1), and the fixing posts (10) are integrally formed with the shell (1).

4. The selective refraction automotive blind spot indicator component based on polarization light modulation according to claim 1, characterized in that: The LED circuit board (2) is installed inside the housing (1), and the LED circuit board (2) is snapped into the housing (1) by three clips (8). The position of the through hole (11) on the surface of the LED circuit board (2) corresponds one-to-one with the position of the fixing post (10). The top of the three fixing posts (10) all penetrate through the through hole (11).

5. The selective refraction automotive blind spot indicator component based on polarization light modulation according to claim 1, characterized in that: The position of the slot (12) on the bottom surface of the lens (5) corresponds one-to-one with the position of the fixing post (10), and the top end of the three fixing posts (10) through the through hole (11) is installed into the slot (12) on the bottom surface of the lens (5), and the lens (5) is engaged with the three fixing posts (10).

6. The selective refraction automotive blind spot indicator component based on polarization light modulation according to claim 1, characterized in that: The soft light cover plate (6) is installed inside the housing (1) and is bonded to the housing (1). The tape (7) is placed on the surface of the soft light cover plate (6) away from the lens (5) and is bonded to the soft light cover plate (6).

7. The selective refraction automotive blind spot indicator component based on polarization light modulation according to claim 1, characterized in that: One end of the wire (3) is installed into the interior of the housing (1) through the wire hole (9) and welded to the LED circuit board (2), and the other end of the wire (3) is screwed into the connector (4).

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