Mirror angle adjustment device and head-up display device

Abstract

The present disclosure relates to a mirror angle adjusting device and a head-up display device. The mirror angle adjusting device comprises a mirror support for supporting a mirror and including a rotation shaft; a fixed support for supporting the rotation shaft in a manner allowing the rotation shaft to rotate; a magnet provided on one of the rotation shaft and the fixed support; a sensor provided on the other and capable of sensing a magnetic field formed by the magnet; a driving device configured to drive the rotation shaft to rotate; and a control device configured to collect an induced voltage of the sensor and a tangent at the induced voltage of an output waveform, and control the driving device to rotate the rotation shaft until a desired angle position at which the induced voltage collected thereat is equal to a predetermined voltage and the tangent is equal to a predetermined tangent, when the induced voltage is not equal to the predetermined voltage and / or the tangent is not equal to the predetermined tangent. According to the present disclosure, automatic correction of the mirror angle position deviation can be achieved, thereby improving driving safety and bringing a better driving experience.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and more specifically, to a reflector angle adjustment device and a head-up display device including the reflector angle adjustment device. Background Technology

[0002] Head-up displays (HUDs) are widely used in vehicles and other means of transportation. They are used to display vehicle information and other information on the windshield in front of the driver to improve driving safety and provide a better driving experience.

[0003] In the structural design of a HUD, the rotation angle of the reflector is crucial, directly affecting the driver's intuitive judgment of the image quality and display position. Currently, a mechanical angle adjustment method is commonly used to adjust the reflector's rotation angle. This mechanical angle adjustment method requires determining a mechanical zero point and rotating the reflector by a predetermined angle from the mechanical zero point to achieve the desired angular position, thereby obtaining an image in the desired display position.

[0004] However, the mechanical zero position can sometimes become inaccurate due to external damage or other factors, causing the reflector to fail to reach the desired angular position after the motor has rotated to the predetermined angle. Furthermore, even when the reflector is already at the desired angular position, it may shift due to abnormal bumps or vibrations during vehicle operation, resulting in angular deviations that affect driving safety and experience. Moreover, in this mechanical angle adjustment method, such angular deviations cannot be corrected automatically and can only be restored by power-off and restarting, which also negatively impacts driving safety and experience. Summary of the Invention

[0005] This section provides a general overview of this disclosure, rather than a full disclosure of the entire scope or all features of this disclosure.

[0006] The purpose of this disclosure is to provide a reflector angle adjustment device that can eliminate reflector angle position deviation caused by mechanical zero-position misalignment, and a head-up display device including the reflector angle adjustment device.

[0007] Another object of this disclosure is to provide a reflector angle adjustment device capable of automatically correcting reflector angle position deviation, and a head-up display device including the reflector angle adjustment device.

[0008] To achieve the above objectives, according to one aspect of this disclosure, a mirror angle adjustment device is provided, comprising:

[0009] A mirror support for supporting a mirror and including a pivot, the mirror support being configured to rotate the mirror by rotation of the pivot;

[0010] A fixed bracket is configured to support the rotating shaft in a manner that allows the shaft to rotate.

[0011] A magnet is mounted on either the rotating shaft or the fixed support.

[0012] A sensor is mounted on the other of the rotating shaft and the fixed bracket and is configured to sense the magnetic field generated by the magnet;

[0013] Drive unit, configured to drive shaft to rotate; and

[0014] The control device is configured to acquire the induced voltage of the sensor and the tangential direction of the sensor's output waveform at the induced voltage, and when the induced voltage is not equal to a predetermined voltage and / or the tangential direction of the output waveform at the induced voltage is not equal to a predetermined tangential direction, control the drive device to rotate the shaft until a desired angular position is reached, at the desired angular position, where the induced voltage acquired is equal to the predetermined voltage and the tangential direction of the output waveform at the acquired induced voltage is equal to the predetermined tangential direction.

[0015] In some embodiments, the predetermined voltage can be the induced voltage of the sensor when the shaft rotates to an angular position determined according to the desired eye box position, and the predetermined tangent is the tangent of the output waveform at the induced voltage when the sensor rotates to an angular position determined according to the desired eye box position.

[0016] In some embodiments, the shaft may have a cylindrical first slot at one end face, and the mounting bracket has a hollow cylindrical first protrusion that can be received in the first slot, so that the shaft is supported on the mounting bracket in a manner that allows it to rotate about the first protrusion, and the sensor is disposed inside the hollow part of the first protrusion.

[0017] In some embodiments, the shaft may also have a second slot at its end face, and the magnet may be arranged in the second slot.

[0018] In some embodiments, the magnet may include a first magnet and a second magnet, both of which are arc-shaped and arranged in a centrally symmetrical manner about their end faces.

[0019] In some embodiments, the mounting bracket may also be provided with a second protrusion configured to surround the first protrusion to form an annular groove between the first and second protrusions that can mate and receive the end of the rotating shaft.

[0020] In some embodiments, the sensor may be fixed to the surface of a circuit board, and the surface of the circuit board may be fixed to a second side of a mounting bracket opposite to the first side where the first protrusion is located, so that the sensor is arranged inside the hollow interior of the first protrusion.

[0021] In some embodiments, resin adhesive may be injected between the surface of the circuit board and the second side of the mounting bracket.

[0022] In some embodiments, the reflector angle adjustment device may also include a base for fixing the drive unit and the mounting bracket.

[0023] According to another aspect of this disclosure, a head-up display device is also provided, including the mirror angle adjustment device as described above.

[0024] According to the above technical solution, the rotation angle of the reflector is measured by setting a magnet on the rotating shaft and sensing the change in the magnetic field formed by the magnet through a sensor mounted on a fixed bracket. A control device collects the induced voltage of the sensor and the tangential direction of the sensor's output waveform at the induced voltage. When the induced voltage is not equal to a predetermined voltage and / or the tangential direction of the output waveform at the induced voltage is not equal to the predetermined tangential direction, the drive device is controlled to rotate the rotating shaft until the real-time collected induced voltage equals the predetermined voltage and the tangential direction of the output waveform at the real-time collected induced voltage equals the predetermined tangential direction. This allows the reflector to rotate accurately to the desired angular position. Therefore, not only can the reflector angular position deviation caused by mechanical zero-position misalignment in mechanical angle adjustment methods be eliminated, but automatic correction of the reflector angular position deviation can also be achieved, thereby improving driving safety and providing a better driving experience. Attached Figure Description

[0025] The features and advantages of embodiments of the present disclosure will become more readily understood from the following description with reference to the accompanying drawings. The drawings are not drawn to scale and some features may be enlarged or reduced to show details of specific components.

[0026] In the attached diagram:

[0027] Figure 1 This is a schematic diagram of the structure of a mirror angle adjustment device according to an embodiment of the present disclosure.

[0028] Figure 2 This is a schematic diagram of measuring the rotation angle of an object based on the Hall effect principle.

[0029] Figure 3 This is a schematic diagram of the output waveform of the Hall sensor corresponding to a 360° rotation of the magnetic field.

[0030] Figure 4 for Figure 1 The diagram shown is an exploded view of the reflector angle adjustment device, in which the drive device and control device are omitted.

[0031] Figure 5 For the completed assembly Figure 4The cross-sectional view of the reflector angle adjustment device shown.

[0032] Figure 6 for Figure 1 A perspective view of a portion of the reflector bracket of the reflector angle adjustment device shown.

[0033] Figure 7 for Figure 1 The front view of the mounting bracket for the reflector angle adjustment device shown.

[0034] Figure 8 for Figure 1 Rear view of the mounting bracket for the reflector angle adjustment device shown.

[0035] Figure 9 for Figure 1 A perspective view of the magnet of the reflector angle adjustment device shown.

[0036] Figure 10 for Figure 1 The diagram shows a perspective view of a Hall circuit board with a Hall sensor fixed to the reflector angle adjustment device.

[0037] Figure 11 For along Figure 5 The sectional view taken by the CC line.

[0038] Figure 12 This diagram illustrates the connection between the mainboard, Hall sensors, and drive units.

[0039] Figure 13 This is a frontal perspective view of the reflector angle adjustment device, including the bottom shell.

[0040] Figure 14 for Figure 13 The image shows a top-view perspective view of the reflector angle adjustment device.

[0041] In the accompanying drawings, the same or corresponding technical features or components are represented by the same or corresponding reference numerals. Detailed Implementation

[0042] The present disclosure will now be described in detail with reference to the accompanying drawings and exemplary embodiments. It should be noted that the following detailed description of the present disclosure is for illustrative purposes only and is not intended to limit the scope of the disclosure.

[0043] It should be noted that, for clarity, not all features of a particular embodiment are described or shown in the specification and drawings. Furthermore, to avoid unnecessary details obscuring the technical solutions of interest in this disclosure, only the device structure closely related to the technical solutions of this disclosure is described and shown in the specification and drawings, while other details that are not closely related to the technical content of this disclosure and are known to those skilled in the art are omitted.

[0044] As mentioned earlier, existing mechanical angle adjustment methods require using the mechanical zero position as the starting position for calibrating the motor rotation, which is also the starting position for the reflector rotation. Furthermore, optical stage calibration is needed based on the HUD's eye-box position (i.e., the optimal viewing area for the user's eyes relative to the HUD's optical output) to determine the corresponding angular position of the reflector. From this, the angle that the motor driving the reflector needs to rotate to drive its rotation when the reflector rotates from the mechanical zero position to that corresponding angular position is calculated—the predetermined angle. In this way, when the reflector rotates to that corresponding angular position, the HUD's optical output is positioned at the desired eye-box position, allowing the driver to clearly and comfortably see the information projected by the HUD.

[0045] However, the mechanical zero position can become inaccurate due to various factors, such as wear or loosening of components, external damage, and abnormal vibration. In such cases, when the motor still rotates the predetermined angle from the inaccurate mechanical zero position according to the original setting, the angle position reached by the reflector will inevitably deviate from the expected angle position. Consequently, the optical output of the HUD cannot reach the desired eyepiece position, thus affecting the quality and display position of the HUD projected image. Furthermore, even when the reflector is already at the desired angle position, factors such as abnormal bumps and vibrations during vehicle operation can also cause the reflector's angle position to shift away from the expected angle position, which will also affect the quality and display position of the HUD projected image, thereby reducing driving safety and driving experience.

[0046] Moreover, in this mechanical angle adjustment method, it is impossible to correct mechanical zero-position misalignment or deviation of the reflector's angle position from the desired angle position. It can only be restored by powering off and restarting, which reduces driving safety and driving experience.

[0047] The above-mentioned problems can be solved by the reflector angle adjustment device according to the embodiments of this disclosure. Hereinafter, reference will be made to... Figures 1 to 12 A mirror angle adjustment device according to an embodiment of the present disclosure will be described.

[0048] Reference Figure 1 as well as Figures 4 to 8 The reflector angle adjustment device 1 includes a reflector bracket 10, a fixed bracket 20, and a drive device 30.

[0049] The mirror support 10 supports the mirror 2 and includes a pivot 101. The mirror support 10 is configured to rotate the mirror 2 via rotation of the pivot 101. For example, as Figure 4 As shown, the reflector support 10 may include a frame portion 102 connected to a pivot 101, the frame portion 102 for supporting the reflector 2 on its inner side. Thus, when the pivot 101 rotates, the frame portion 102, and therefore the reflector 2, can rotate synchronously with the rotation of the pivot 101. The pivot 101 may include a first portion and a second portion located on both sides of the reflector 2, i.e., as shown... Figure 1 The left and right portions are shown. However, it is conceivable that the pivot 101 could also be located only on one side of the two sides of the reflector 2.

[0050] It should be noted that the reflector mentioned in the text can be a large reflector used in HUDs to reflect light to, for example, a windshield. However, it is understood that the reflector can also be other types of reflectors.

[0051] The fixed bracket 20 is configured to support the rotating shaft 101 in a manner that allows the rotating shaft 101 to rotate. That is, the fixed bracket 20 can support the rotating shaft 101, and the rotating shaft 101 can still rotate while being supported by the fixed bracket 20. For example, as... Figure 1 and Figure 4 As shown, the fixed bracket 20 may include a first fixed bracket 201 and a second fixed bracket 202 located on both sides of the reflector 2, and the ends of the first part and the second part of the rotating shaft 101 are supported by the first fixed bracket 201 and the second fixed bracket 202, respectively.

[0052] The drive unit 30 is configured to drive the rotating shaft 101 to rotate. It is conceivable that the drive unit 30 may be a motor assembly coupled to the rotating shaft 101. Figure 1 As shown, the motor assembly may include, for example, a motor 301, a motor bracket 302, and a worm gear (not shown) driven by the motor 301, and the worm gear may be coupled to, for example, a helical gear 103 connected to a shaft 101 (see Figure 103). Figure 4 The drive unit 30 is engaged, thereby allowing the rotating shaft 101 to rotate via a motor. It is conceivable that the drive unit 30 could also be other types of drive units.

[0053] According to the embodiments of this disclosure, refer to Figure 1 as well as Figures 4 to 11 The reflector angle adjustment device 1 also includes a magnet 40, a Hall sensor 50, and a control device 60.

[0054] The magnet 40 is fixedly mounted on the rotating shaft 101. In this way, the magnet 40 can rotate synchronously with the rotation of the rotating shaft 101. Therefore, the magnetic field generated by the magnet 40 can also rotate synchronously with the rotation of the rotating shaft 101.

[0055] The Hall sensor 50 is fixedly mounted on the mounting bracket 20 and configured to sense the magnetic field generated by the magnet 40. In other words, the Hall sensor 50 is fixed in position by being fixedly mounted on the mounting bracket 20 and will not move. Furthermore, the arrangement of the Hall sensor 50 enables it to sense the magnetic field generated by the magnet 40. Therefore, when the magnetic field changes, the change in the magnetic field can be sensed by the Hall sensor 50.

[0056] Based on this, in the embodiments of this disclosure, when the rotating shaft 101 rotates, the magnet 40 fixed on the rotating shaft 101 will rotate accordingly, causing the magnetic field generated by the magnet 40 to rotate as well, while the position of the Hall sensor 50 remains fixed. Therefore, the rotation angle of the magnet 40 and thus the rotating shaft 101 and the reflector 2 can be measured by sensing the change in the magnetic field with the help of the Hall sensor 50.

[0057] It is conceivable that the magnet 40 can also be mounted on the fixed support 20, and the Hall sensor 50 can be mounted on the rotating shaft 101. Thus, a relative rotation can be formed between the magnet 40 and the Hall sensor 50, so that the rotation angle of the reflector 2 can be measured by sensing the change in the magnetic field with the help of the Hall sensor 50.

[0058] Understandably, the magnet and Hall sensor can also be non-fixedly mounted on the rotating shaft and fixed bracket, as long as the change in the relative positional relationship between the magnet and the Hall sensor can make the induced voltage of the Hall sensor reflect the rotation angle of the rotating shaft and the reflector.

[0059] The control device 60 is configured to acquire the induced voltage of the Hall sensor 50 and the tangential direction of the output waveform of the Hall sensor 50 at the induced voltage, and when the induced voltage is not equal to a predetermined voltage and / or the tangential direction of the output waveform at the induced voltage is not equal to a predetermined tangential direction, control the drive device 30 to rotate the shaft 101 until the desired angular position, at the desired angular position, the induced voltage acquired thereat is equal to the predetermined voltage and the tangential direction of the output waveform at the acquired induced voltage is equal to the predetermined tangential direction.

[0060] The aforementioned change in the magnetic field is determined by the induced voltage of the Hall sensor 50 and the tangent of the output waveform of the Hall sensor 50 at that induced voltage. Specifically, as... Figure 2 As shown, according to Hall's principle, when magnet A generates a magnetic field ( Figure 2When a magnetic field (represented by a dashed line and an arrow indicating the direction of the magnetic field) is applied to Hall element B, a potential difference will appear across Hall element B. Therefore, the magnetic field A can be measured by measuring the potential difference across Hall element B, or in other words, by measuring the induced voltage of Hall sensor 50. Furthermore, as... Figure 3 As shown, when the magnetic field A rotates 360°, the Hall sensor 50 outputs a waveform representing the change of the induced voltage V with the rotation angle T of the magnetic field. This can be... Figure 3 It is clearly observed from the output waveform that different induced voltages V must correspond to different magnetic field rotation angles T (or different angular positions of the reflector), while different magnetic field rotation angles T may correspond to the same induced voltage V. However, in this case, the tangent of the output waveform at these induced voltages must be different. For example, for Figure 3 At two points on the output waveform where the induced voltage V is 0, their tangents are different. That is, when determining the rotation angle of the magnetic field, both the induced voltage and the tangent of the output waveform at that induced voltage point must be considered. In other words, for two rotation angles of the magnetic field, if either of these factors is different, then the two rotation angles are different.

[0061] Therefore, by measuring the induced voltage of the Hall sensor 50 and the tangential direction of the Hall sensor 50's output waveform at the induced voltage, the corresponding rotation angle of the rotating shaft 101 and thus the reflector 2 can be determined, and consequently, the corresponding angular position of the reflector 2 can also be determined. In other words, each angular position of the reflector 2 corresponds to a fixed induced voltage of the Hall sensor 50 and a corresponding fixed tangential direction. Therefore, as long as the induced voltage sensed by the Hall sensor 50 is equal to the voltage value indicating that the reflector 2 is at the desired angular position (i.e., the predetermined voltage), and the tangential direction of the Hall sensor 50's output waveform at the induced voltage is equal to the tangential direction indicating that the reflector 2 is at the desired angular position (i.e., the predetermined tangential direction), it can be determined that the reflector 2 has rotated to the desired angular position.

[0062] In this scenario, for example, when the reflector 2 is to be rotated into place from its initial position, the control device 60 first acquires the induced voltage of the Hall sensor 50 at the initial position and the tangential direction of the output waveform of the Hall sensor 50 at that induced voltage. If it determines that the induced voltage is not equal to a predetermined voltage and / or the tangential direction of the output waveform at that induced voltage is not equal to a predetermined tangential direction, it controls the drive device 30 to rotate the shaft 101. This acquisition, determination, and rotation continue in real-time until the reflector reaches the desired angular position where the induced voltage acquired at that point equals the predetermined voltage and the tangential direction of the output waveform at that acquired induced voltage equals the predetermined tangential direction. In this way, the reflector 2 can be accurately rotated into place without considering whether the initial position remains fixed. This eliminates the problem of the reflector deviating from the desired angular position due to mechanical zero-position misalignment when using mechanical angle adjustment methods, thereby improving driving safety and providing a better driving experience.

[0063] On the other hand, when the reflector 2, which is already at the desired angular position, deviates from that desired angular position due to abnormal bumps and vibrations during vehicle operation, for example, when the reflector 2 tilts forward or backward, the tangential direction of the sensing voltage and / or output waveform of the Hall sensor 50 at that sensing voltage will change. For example, assuming Figure 3 The peak 'a' of the output waveform shown represents the desired angular position of the reflector. When the reflector 2 tilts forward, the waveform corresponds to the portion 'b' to the right of peak 'a', and when the reflector 2 tilts backward, the waveform corresponds to the portion 'c' to the left of peak 'a'. Clearly, the induced voltage V and the corresponding tangential direction will change. Therefore, the control device 60 controls the drive device 30 to rotate the shaft 101 and return it to the desired angular position where the induced voltage collected at that point equals the predetermined voltage and the tangential direction of the output waveform at that collected induced voltage equals the predetermined tangential direction. This achieves automatic correction of the angular position deviation of the reflector 2. Thus, angular position deviation can be automatically corrected without power interruption, thereby improving driving safety and providing a better driving experience.

[0064] It is conceivable that, for example Figure 12 As shown, the control device 60 can be a main board, which includes a main control chip 601, a Hall sensor 50 and a drive device 30, all of which are electrically connected to the main board. The main control chip 601 outputs a drive signal to the drive device 30 based on the difference between the induced voltage received from the Hall sensor 50 and a predetermined voltage, as well as the tangential direction of the output waveform of the Hall sensor 50 at the induced voltage, so as to drive the rotating shaft 101 to rotate until the desired angular position.

[0065] It is conceivable that the predetermined voltage can be the voltage sensed by the Hall sensor 50 when the rotating shaft 101 rotates to an angle position determined according to the desired eye box position, and the predetermined tangent can be the tangent of the output waveform at the voltage sensed by the Hall sensor 50 when the rotating shaft 101 rotates to an angle position determined according to the desired eye box position.

[0066] As mentioned earlier, optical stage calibration can be performed based on the desired eye box position to determine the corresponding angular position of the reflector, and this angular position is taken as the desired angular position. The corresponding induced voltage of the Hall sensor 50 obtained thereby is taken as the predetermined voltage, and the tangent of the output waveform at this induced voltage is taken as the predetermined tangent. By determining the predetermined voltage and predetermined tangent in this way, the optical output of the HUD can be made to reach the desired eye box position, so that the driver can see the information projected by the HUD clearly and comfortably.

[0067] However, it is conceivable that the predetermined voltage and the corresponding predetermined tangent can also be determined based on other factors such as data statistics and manufacturing experience.

[0068] The following is a further explanation of a specific example structure of the reflector angle adjustment device 1.

[0069] In some implementations, such as Figures 4 to 8 As shown, the rotating shaft 101 may have a cylindrical first slot 1011 at the end face 101a of one end 1013, and the fixed bracket 20 may have a hollow cylindrical first protrusion 2011. The first protrusion 2011 can be matched and received in the first slot 1011, so that the rotating shaft 101 is supported on the fixed bracket 20 in a manner that allows it to rotate around the first protrusion 2011. The Hall sensor 50 may be disposed in the hollow interior 2011a of the first protrusion 2011.

[0070] With the above configuration, when the first protrusion 2011 is received in the first slot 1011, the outer peripheral surface 2011b of the first protrusion 2011 matches the inner peripheral surface 1011a of the first slot 1011, so that the rotating shaft 101 can not only be supported by the first protrusion 2011, but also rotate around the first protrusion 2011. In this way, the rotating shaft 101 can rotate stably around its central axis, which is beneficial not only to the stable rotation of the reflector, but also to the accurate measurement of the rotation angle of the reflector. In addition, in the above configuration, by constructing the first protrusion 2011 as hollow and placing the Hall sensor 50 in the hollow interior 2011a of the first protrusion 2011, the Hall sensor 50 can more conveniently and accurately sense changes in the magnetic field, and the structure can be simplified, which is particularly advantageous for HUDs with limited internal space.

[0071] It is conceivable that the top surface of the first protrusion 2011 can be configured to engage with the bottom surface of the first slot 1011 when the first protrusion 2011 is received in the first slot 1011, thereby achieving a more stable engagement structure and allowing the hollow interior 2011a to have more space to facilitate the arrangement of the Hall sensor 50 therein.

[0072] It should be noted that in all the accompanying drawings and descriptions in conjunction with the drawings, only the left end of the rotating shaft 101 and the corresponding first fixed bracket 201 are used as examples to illustrate and explain the above-described structures and related structures mentioned below. However, it is understood that these structures can also be implemented on the right end of the rotating shaft 101 and the corresponding second fixed bracket 202, which will not be described in detail below.

[0073] In some implementations, such as Figure 6 As shown, the shaft 101 may also have a second slot 1012 at the end face 101a, and the magnet 40 is arranged in the second slot 1012.

[0074] In this way, the magnet 40 can be integrated inside the rotating shaft 101. This reduces the likelihood of accidental displacement or damage to the magnet 40 if it were located outside the rotating shaft 101, thus affecting measurement accuracy. Furthermore, it simplifies the structure and saves space, which is particularly advantageous for HUDs with limited internal space. Moreover, with the Hall sensor 50 positioned in the first slot 1011 of the rotating shaft 101 via the first protrusion 2011, placing the magnet 40 in the second slot 1012 located at the end face 101a of the rotating shaft 101 shortens the distance between the magnet 40 and the Hall sensor 50. This enhances the strength of the magnetic field sensed by the Hall sensor 50, thereby improving measurement stability and accuracy.

[0075] In some implementations, such as Figure 5 , Figure 6 , Figure 9 and Figure 11 As shown, the magnet 40 may include a first magnet 401 and a second magnet 402, both of which may be arc-shaped and arranged in a centrally symmetrical manner about the end face 101a.

[0076] The arc shape allows the magnet to be longer when integrated into the end face 101a. Combined with its shape characteristics, this results in a stronger and denser magnetic field, thereby improving the stability and accuracy of the measurement. Furthermore, the symmetrical arrangement of the first magnetic field 401 and the second magnetic field 402 about the center of the end face 101a facilitates the Hall sensor 50, located within the first slot 1011, to sense a more uniform magnetic field, thus obtaining more accurate measurement results.

[0077] It is understood that the second slot 1012 may correspondingly include two parts for accommodating the first magnet 401 and the second magnet 402, respectively. Furthermore, it is conceivable that the outer end face of the magnet 40 may be flush with the end face 101a, and that, in order to prevent the magnet 40 from detaching from the second slot 1012, the magnet 40 may be secured in the second slot 1012 after it has been inserted, for example, by using glue or other fixing methods.

[0078] In some implementations, such as Figure 6 and Figure 7 As shown, the fixing bracket 20 may also be provided with a second protrusion 2012, which is configured to surround the first protrusion 2011 to form an annular groove 203 between the first protrusion 2011 and the second protrusion 2012 that can mateably receive the end 1013 of the rotating shaft 101.

[0079] With the above-described structure, when the end portion 1013 of the rotating shaft 101 is received within the annular groove 203 between the first protrusion 2011 and the second protrusion 2012, the inner circumferential surface 2012a of the second protrusion 2012 matches the outer circumferential surface 1013a of the end portion 1013 of the rotating shaft 101, so that the rotating shaft 101 engages with both the first protrusion 2011 and the second protrusion 2012 and is supported between them. In this way, the rotational stability of the rotating shaft 101 can be further improved, which is beneficial for the stable rotation of the reflector and for the accurate measurement of the rotation angle of the reflector.

[0080] In some implementations, such as Figure 4 , Figure 5 , Figure 8 and Figure 10 As shown, the Hall sensor 50 can be fixed to the surface 701 of the Hall circuit board 70, and the surface 701 of the Hall circuit board 70 is fixed to the second side 201b of the fixing bracket 20 opposite to the first side where the first protrusion 2011 is located, so that the Hall sensor 50 is arranged in the hollow interior 2011a of the first protrusion 2011.

[0081] For example, the Hall sensor 50 can be a through-hole Hall sensor and soldered to a Hall circuit board (i.e., Hall PCB) 70. The surface 701 of the Hall circuit board 70 can mate with the second side 201b of the mounting bracket 20, and the Hall circuit board 70 can be positioned on the second side 201b, for example, using the positioning holes 701a on the Hall circuit board 70 and the positioning pins 201c on the second side 201b, so that the Hall sensor 50 can be accurately inserted into the hollow interior 2011a of the first protrusion 2011, ensuring the positional accuracy and assembly reliability of the Hall sensor 50.

[0082] In some embodiments, resin adhesive may be injected between the surface 701 of the Hall circuit board 70 and the second side 201b of the mounting bracket 20.

[0083] In this way, the Hall circuit board 70 can be more securely fixed to the mounting bracket 20, thereby making the assembly position of the Hall sensor 50 fixed to the surface 701 of the Hall circuit board 70 more stable, which is beneficial to the stability of sensing and thus can improve the accuracy of measurement.

[0084] In some implementations, such as Figure 4 and Figure 8 As shown, a protective cover 80 for protecting the Hall circuit board 70 can also be provided on the opposite side of the Hall circuit board 70 from the side where the surface 701 is located. The protective cover 80 is fixed to the fixing bracket 20.

[0085] For example, the protective cover 80 can be fixed to the fixing bracket 20 by, for example, snapping into the outer groove 201d of the fixing bracket 20, thereby protecting the Hall circuit board 70.

[0086] In some implementations, refer to Figure 13 and Figure 14 The reflector angle adjustment device 1 may also include a base shell 80 for fixing the drive device 30 and the fixing bracket 20.

[0087] For example, the drive unit 30 can be locked to the drive unit locking surface 801 of the base housing 80 by screws, and the fixing brackets 20, such as the first fixing bracket 201 and the second fixing bracket 202, can be locked to the first mounting surface 802a and the second mounting surface 802b of the base housing 80 by screws, respectively. In this way, the drive unit 30 and the fixing brackets 20 can be in a stable working position, thereby obtaining a stable working state.

[0088] According to an embodiment of this disclosure, a head-up display device is also provided, including the mirror angle adjustment device 1 as described above.

[0089] While this disclosure has been described with reference to exemplary embodiments, it should be understood that this disclosure is not limited to the specific embodiments described and shown herein. Various changes to the exemplary embodiments can be made by those skilled in the art without departing from the scope defined by the claims of this disclosure.

[0090] The features mentioned and / or shown in the foregoing description of exemplary embodiments of this disclosure may be combined in the same or similar manner with one or more other embodiments, combined with features in other embodiments, or substituted for corresponding features in other embodiments. Such combinations or substitutions should also be considered as including within the scope of protection of this disclosure.

Claims

1. A reflector angle adjustment device, characterized in that, include: A mirror support for supporting a mirror and including a pivot, the mirror support being configured to rotate the mirror by rotation of the pivot; A fixed bracket is configured to support the rotating shaft in a manner that allows the rotating shaft to rotate. A magnet is disposed on one of the rotating shaft and the fixed bracket; A sensor is disposed on the other of the rotating shaft and the fixed bracket and configured to sense the magnetic field formed by the magnet; A drive device configured to drive the rotating shaft to rotate; as well as A control device is configured to acquire the induced voltage of the sensor and the tangential direction of the sensor's output waveform at the induced voltage. When the induced voltage is not equal to a predetermined voltage and / or the tangential direction of the output waveform at the induced voltage is not equal to a predetermined tangential direction, the control device controls the drive device to rotate the shaft until a desired angular position is reached. At this desired angular position, the acquired induced voltage equals the predetermined voltage, and the tangential direction of the output waveform at the acquired induced voltage equals the predetermined tangential direction. The rotating shaft has a cylindrical first slot at one end face, and the fixing bracket has a hollow cylindrical first protrusion. The first protrusion can be received in the first slot, so that the rotating shaft is supported on the fixing bracket in a way that allows it to rotate about the first protrusion. The sensor is disposed inside the hollow part of the first protrusion. The shaft is further provided with a second slot at its end face, and the magnet is arranged in the second slot.

2. The reflector angle adjustment device according to claim 1, characterized in that, The predetermined voltage is the induced voltage of the sensor when the rotating shaft rotates to an angle position determined according to the desired eye box position, and the predetermined tangent is the tangent of the output waveform at the induced voltage when the sensor rotates to an angle position determined according to the desired eye box position.

3. The reflector angle adjustment device according to claim 1, characterized in that, The magnet includes a first magnet and a second magnet, both of which are arc-shaped and arranged in a centrally symmetrical manner about the end face.

4. The reflector angle adjustment device according to claim 1, characterized in that, The fixing bracket is further provided with a second protrusion configured to surround the first protrusion to form an annular groove between the first protrusion and the second protrusion that can mate and receive the end of the rotating shaft.

5. The reflector angle adjustment device according to claim 1, characterized in that, The sensor is fixed to the surface of the circuit board, and the surface of the circuit board is fixed to a second side of the mounting bracket opposite to the first side where the first protrusion is located, so that the sensor is arranged in the hollow interior of the first protrusion.

6. The reflector angle adjustment device according to claim 5, characterized in that, Resin adhesive is injected between the surface of the circuit board and the second side of the mounting bracket.

7. The reflector angle adjustment device according to claim 1 or 2, characterized in that, It also includes a base shell for fixing the drive unit and the fixing bracket.

8. A head-up display device, characterized in that, Includes the mirror angle adjustment device according to any one of claims 1 to 7.

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