Head-up display device, optical adjusting assembly and control method thereof

Abstract

The invention provides a head-up display device, an optical adjustment assembly and a control method thereof. The optical adjusting assembly comprises a first reflecting mirror and a second reflecting mirror. The first reflecting mirror has a first state and a second state, the second reflecting mirror has a reference state, and an image light beam is reflected to the second reflecting mirror through the first reflecting mirror in the first state and is reflected to the eye box through the second reflecting mirror in the reference state; a first included angle is formed between the reflecting surface of the first reflecting mirror in the second state and the reflecting surface of the first reflecting mirror in the first state, and the reflecting surface of the second reflecting mirror in the reference state is located between a first reference position and a second reference position; a second included angle is formed between the reflecting surface of the second reflector at the first reference position and the reflecting surface of the second reflector at the second reference position, and the second included angle is smaller than the first included angle. According to the invention, the large-angle rotation requirement when the large reflector is switched among different states can be reduced.

Description

Technical Field

[0001] This application relates to the field of displays, and more particularly to a head-up display device, an optical adjustment assembly, and a control method thereof. Background Technology

[0002] Head-up display (HUD) devices are an important component of the rapidly developing smart cars.

[0003] To prevent sunlight from backflowing along the optical path and causing adverse effects on the display screen (such as screen burn-in) when the HUD is not in operation, traditional head-up display devices typically rotate a large reflector from the working angle range to the sleep angle to change the reflection path when not in operation; when the HUD is turned on or woken up, the large reflector is rotated back from the sleep angle to the working angle range to restore normal imaging.

[0004] However, since the dormant angle of the large reflector is much larger than the working angle range required for normal imaging, the large reflector needs to be driven to rotate at a large angle every time the HUD is woken up. This not only easily causes wear on the reflector shaft and transmission system, but also makes the wake-up process take a long time.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0006] Based on this, this application provides a head-up display device, an optical adjustment component and a control method thereof, which can reduce the large-angle rotation requirement when the large reflector switches between different states.

[0007] The present invention provides an optical adjustment component, including a first reflector and a second reflector, wherein the first reflector is disposed on a first transmission path of an image beam; The first reflector has a first state and a second state, and the second reflector has a reference state. The image beam is reflected by the first reflector in the first state to the second reflector, and is reflected by the second reflector in the reference state to the eye box. There is a first angle between the reflecting surface of the first mirror in the second state and the reflecting surface of the first mirror in the first state. The reflecting surface of the second mirror in the reference state is located between the first reference position and the second reference position. There is a second angle between the reflecting surface of the second mirror in the first reference position and the reflecting surface of the second mirror in the second reference position. The second angle is smaller than the first angle.

[0008] Based on the same inventive concept, the present invention also provides an optical adjustment component control method for controlling the optical adjustment component of the present invention.

[0009] Based on the same inventive concept, the present invention also provides a head-up display device, including the optical adjustment component of the present invention.

[0010] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application.

[0011] Compared with the prior art, the head-up display device, optical adjustment assembly and control method provided by the present invention achieve at least the following beneficial effects: The optical adjustment component provided by the present invention includes a first reflector and a second reflector. The first reflector is disposed on a first transmission path of an image beam. The first reflector has a first state and a second state, and the second reflector has a reference state. The image beam is reflected by the first reflector in the first state to the second reflector, and is reflected by the second reflector in the reference state to the eyepiece. There is a first angle between the reflecting surface of the first reflector in the second state and the reflecting surface of the second reflector in the first state. The reflecting surface of the second reflector in the reference state is located between a first reference position and a second reference position. There is a second angle between the reflecting surface of the second reflector in the first reference position and the reflecting surface of the second reflector in the second reference position. The second angle is smaller than the first angle.

[0012] Because a first angle exists between the reflecting surface of the first mirror in the second state and the reflecting surface of the first mirror in the first state, and this first angle is greater than the second angle formed by the second mirror between the first reference position and the second reference position, the angle change to prevent external sunlight backflow is borne by the first mirror, while the second mirror only needs to operate within a smaller angle range, thus avoiding large-angle rotation of the second mirror. During imaging, the second mirror operates in the reference state, and its reflecting surface is always located between the first and second reference positions, with a relatively small range of angle change. This reduces wear caused by frequent rotation of the second mirror, which helps extend its service life. Furthermore, since the first mirror, which bears the larger angle change, does not need high-precision angle adjustment, but only needs to switch between the first and second states, the requirements for the first mirror in terms of accuracy, torque, and response speed are reduced, which helps to shorten the state switching time of the optical adjustment components.

[0013] Other advantages, objectives, and features of this application will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be learned from practice of this application. The objectives and other advantages of this application can be realized and obtained through the following description. Attached Figure Description

[0014] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the position of the first reflecting mirror in different states of an optical adjustment component provided in this application; Figure 2 This is a schematic diagram of the structure of an optical adjustment component provided in this application when applied to a head-up display device; Figure 3 This is a schematic diagram of the position of the second reflector at different reference positions in an optical adjustment component provided in this application; Figure 4 This is a diagram showing the connection relationship between the first rotating shaft and the first reflecting mirror body in an optical adjustment assembly provided in this application; Figure 5 This is a diagram showing the connection relationship between the first rotating shaft and the first reflecting mirror body in another optical adjustment assembly provided in this application; Figure 6 This is a schematic diagram of the signal transmission paths of the first control signal and the second control signal in an optical adjustment assembly provided in this application; Figure 7 This is a schematic diagram of the signal transmission path of the third control signal in an optical adjustment assembly provided in this application; Figure 8 This is a flowchart illustrating the operation of an optical adjustment component provided in this application when it receives a sleep or start signal input; Figure 9 This is a flowchart illustrating the operation of an optical adjustment component provided in this application when it receives a gear adjustment signal input. Figure 10 This is a flowchart illustrating a control method for an optical adjustment component provided in this application.

[0016] Explanation of reference numerals in the attached figures: 110. First reflecting mirror; 110a. First state; 110b. Second state; 111. First reflecting mirror body; 112. First rotating shaft; 112A. U-shaped groove; 112B. Clamping structure; 113. First driving component; 120. Second reflector; 121. Second reflector body; 122. Second pivot; 120a. First reference position; 120b. Second reference position; 123. Second driving component; 210. Control unit. Detailed Implementation

[0017] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate preferred embodiments of the application. However, this application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

[0019] When an element or structure is referred to as "connected to," it can be directly connected to or there can be intervening elements or structures. Furthermore, although the terms first, second, third, etc., may be used to describe various elements, components, or signals, these elements, components, or signals should not be limited by these terms. These terms are merely used to distinguish one element, component, or signal from another. Therefore, without departing from the teachings of this application, the first element, component, or signal discussed below may be referred to as a second element, component, or signal; for example, a first control signal may be referred to as a second control signal, and similarly, a second control signal may be referred to as a first control signal; the first control signal and the second control signal are different control signals.

[0020] It should also be understood that, in addition to the orientation shown in the figure, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial description used herein shall be interpreted accordingly.

[0021] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. When the terms “comprise” and / or “comprising” are used in this specification, the presence of the stated feature, integer, step, operation, element, and / or part is established, but the presence or addition of one or more other features, integers, steps, operations, elements, parts, and / or groups is not excluded. Meanwhile, when used herein, the term “and / or” includes any and all combinations of the associated listed items.

[0022] To prevent sunlight from backflowing along the optical path and causing adverse effects (such as burn-in) on the display screen when not in operation, traditional head-up displays (HUDs) typically rotate a large reflector from its operating angle range to a sleep angle to change the reflection path. When the HUD is activated or woken up, the large reflector is rotated back from the sleep angle range to restore normal imaging. However, because the sleep angle of the large reflector is much larger than the operating angle range required for normal imaging, each time the HUD is woken up, the large reflector needs to be rotated at a large angle. This not only easily causes wear and tear on the reflector shaft and transmission system, but also makes the wake-up process relatively long.

[0023] Therefore, this application aims to provide a solution that can address the aforementioned technical problems and reduce the need for large-angle rotation of the large reflector when switching between different states. Details will be elaborated in subsequent embodiments.

[0024] This application provides an optical adjustment assembly. Please refer to [link / reference]. Figures 1 to 3 The optical adjustment assembly may specifically include a first reflector 110 and a second reflector 120. The first reflector 110 has a first state and a second state, and the second reflector 120 has a reference state.

[0025] exist Figure 1 In the diagram, labels 110a and 110b represent the positions of the first reflector 110 in different states, with 110a corresponding to the first state and 110b corresponding to the second state.

[0026] The first reflector 110 is disposed in the first transmission path of the image beam (e.g., ...). Figure 2 As indicated by the middle arrow, the first reflector 110 reflects the image beam in the first state 110a. The image beam, reflected by the first reflector 110 in the first state 110a, reaches the second reflector 120, and is then reflected by the second reflector 120 in the reference state to reach the eye box (where the driver can fully observe the three-dimensional spatial range of the image, and the human eye is within the spatial area of ​​the eye box during viewing). Here, the first state can correspond to the working state of the optical adjustment component; correspondingly, the second state corresponds to the dormant state of the optical adjustment component.

[0027] like Figure 1 and Figure 2 As shown, there is a first angle α between the reflecting surface of the first mirror 110 in the second state 110b and the reflecting surface of the first mirror 110 in the first state 110a. The reflecting surface of the second mirror 120 in the reference state is located between the first reference position and the second reference position. Figure 3The labels 120a and 120b in the diagram represent the positions of the reflecting surface of the second reflector 120 at different reference positions, with 120a corresponding to the first reference position and 120b corresponding to the second reference position. For example... Figure 3 As shown, a second angle β exists between the reflecting surface of the second mirror 120 in the first reference position and the reflecting surface of the second mirror 120 in the second reference position. In this embodiment, the second angle β is smaller than the first angle α.

[0028] It is understandable that when the first reflector 110 is in the second state 110b, the change in the angle of its reflective surface causes the external sunlight to deviate from the original light path used for imaging, so that the backflowing sunlight no longer propagates along the original imaging path and is guided outside the display screen, thereby reducing the adverse effects of external light on the display screen.

[0029] Because there is a first angle α between the reflecting surface of the first reflector 110 in the second state 110b and the reflecting surface of the first reflector 110 in the first state 110a, and this first angle α is greater than the second angle β formed by the second reflector 120 between the first reference position 120a and the second reference position 120b, the angle change to prevent external sunlight backflow is borne by the first reflector 110, while the second reflector 120 only needs to operate within a small angle range, thus avoiding large-angle rotation of the second reflector 120. During the imaging process, the second reflector 120 operates in the reference state, and its reflecting surface is always located between the first reference position 120a and the second reference position 120b, with a small corresponding angle change range. This reduces wear caused by frequent rotation of the second reflector 120 and helps extend its service life. Furthermore, since the first reflector 110, which bears a large angle change, does not need to be adjusted with high precision, it only needs to switch between the first state 110a and the second state 110b. This reduces the requirements of the first reflector 110 in terms of precision, torque and response speed, which helps to reduce the state switching time of the optical adjustment component.

[0030] As an example, when this optical adjustment assembly is applied to a head-up display device, the first reflector 110 can also be referred to as a small reflector or a primary reflector, and the second reflector 120 can also be referred to as a large reflector or a magnifying lens. Figure 2 As shown, the image beam output by the light source is first reflected by the first reflector 110, then reflected and magnified by the second reflector 120, and then the magnified image beam is guided to the windshield for reflection, thereby forming an image that can be observed by the driver's vision and presented to the eye box.

[0031] In the above-described embodiments applied to head-up display devices, the second reflector 120 (i.e., the large reflector) is mainly used to adjust the image height. It only needs to be adjusted in multiple positions within a small angular range under the reference state to meet the personalized needs of different drivers for the image display position. Therefore, the second reflector 120 usually needs to be implemented in conjunction with a high-precision and high-stability drive structure.

[0032] In contrast, the first reflector 110 (i.e. the small reflector) is mainly used to switch between the working state and the sleep state of the optical adjustment component. In the sleep state, it deflects the sunlight that flows into the head-up display device and directs it out of the display screen without the need for fine angle adjustment. Therefore, the first reflector 110 only needs to switch between the preset first state 110a and the second state 110b.

[0033] The drive structure of the first reflector 110 (i.e., the small reflector) has lower requirements for precision, transmission smoothness, and torque compared to the second reflector 120 (i.e., the large reflector). The accuracy of the working position and the sleep position can be ensured by structural limiting. Since the structural size and weight of the first reflector 110 (i.e., the small reflector) are usually relatively small, the first reflector 110 (i.e., the small reflector) can use a smaller motor to complete the state switching at a faster speed, achieving low noise and fast response.

[0034] In the optical adjustment component provided in this application embodiment, the image height adjustment function and the anti-backflow function in sleep mode are respectively implemented by the second reflector 120 and the first reflector 110, so that the second reflector 120 does not need to rotate during sleep and wake-up, and only makes fine adjustments within a small angle range when adjusting the image height, while the first reflector 110 undertakes the larger angle change requirements, thereby decoupling the two functions of the head-up display device.

[0035] In actual use, once the driver adjusts the image to a suitable height in the initial stage, the image height is usually not adjusted frequently. Therefore, the rotation frequency of the second reflector 120 is significantly reduced, which helps to reduce the wear of its drive structure and improve its working stability and service life.

[0036] Furthermore, transferring the large-angle rotation requirement in the sleep state from the second reflector 120 to the first reflector 110 also helps to reduce the overall size of the head-up display device.

[0037] Specifically, the volume and optical reflective surface size of the second reflector 120 are typically larger than those of the first reflector 110. In conventional designs, the large reflector usually needs to simultaneously rotate to adjust the image height angle and the sleep protection angle, thus requiring a large amount of rotation space. However, in this embodiment, the second reflector 120 only adjusts the image height within a small angle range in the reference state. Correspondingly, the anti-backflow function in the sleep state is implemented by the first reflector 110. Since the first reflector 110 is smaller in size, it requires less structural space at the same rotation angle, which helps to reduce the size of the head-up display device's housing and achieve overall structural miniaturization.

[0038] Furthermore, in traditional solutions, since the large reflector simultaneously performs image height adjustment and sleep mode anti-backflow functions, its driving structure usually needs to meet the requirements of high precision and high stability. As a result, during sleep or startup, the large reflector has difficulty quickly reaching the target angle position, and the startup or sleep process takes a long time, sometimes up to 5 to 8 seconds.

[0039] In contrast, in this embodiment, the second reflector 120 does not need to rotate during sleep and startup; only the first reflector 110 switches between a preset working position and a sleep position. Since the first reflector 110 has two defined states, high-precision angle adjustment is unnecessary, and its driving structure can employ a simpler mechanism with a faster response time, significantly shortening the response time of the optical adjustment components during sleep or startup. For example, in some embodiments, the startup or sleep time of the head-up display device can be shortened to approximately 2-3 seconds.

[0040] The above is the core idea of ​​this application. The technical solutions in the embodiments of this application will be clearly and completely described below. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] In some embodiments, the first included angle α formed between the reflecting surface of the first reflector 110 in the second state 110b and the reflecting surface of the first reflector 110 in the first state 110a ranges from 10° to 20°, so that when the first reflector 110 switches from the first state 110a to the second state 110b, it can produce a large change in the reflection direction, thereby effectively changing the propagation path of the reflected light. Even if external sunlight flows back in, it will deviate from the original imaging light path under the reflection of the first reflector 110 and be guided outside the display screen, thus avoiding adverse effects of the back-flowing sunlight on the display screen.

[0042] In some embodiments, the second angle β formed between the reflecting surface of the second mirror 120 at the first reference position 120a and the reflecting surface of the second mirror 120 at the second reference position 120b is less than or equal to 3°, for example, about ±1.5°. This allows the second mirror 120 to be adjusted only within a small angular range to meet the requirements for fine adjustment of the image position during imaging.

[0043] Since the second reflector 120 does not need to rotate at a large angle, it bears a smaller mechanical load during use, which helps to reduce the wear of the rotating shaft and transmission mechanism, thereby improving the working stability and service life of the second reflector 120.

[0044] Please continue reading. Figure 1 and Figure 3 In some embodiments, the first reflector 110 includes a first reflector body 111, a first rotating shaft 112, and a first driving member 113.

[0045] In this embodiment, the first rotating shaft 112 is disposed on the first reflector body 111, and the first driving member 113 is used to drive the first rotating shaft 112 to rotate. The first rotating shaft 112 rotates and drives the first reflector body 111 to rotate, so that the first reflector 110 switches between the first state 110a and the second state 110b.

[0046] As an example, the first rotating shaft 112 can be set on one side of the first reflector body 111, and drive the first reflector body 111 to rotate through this lateral connection, so as to realize the switching of the first reflector 110 between the first state 110a and the second state 110b.

[0047] In the above embodiments, by placing the first rotating shaft 112 on the side of the first reflector body 111, the first reflector body 111 can rotate around the rotating shaft placed on the side, which simplifies the installation and positioning structure of the first reflector 110. As an example, such as... Figure 4 As shown, on the mating component that mates with the first reflector 110, only a U-shaped groove 112A for accommodating the rotating shaft is needed to position the rotating shaft of the first reflector 110, without the need for a complex positioning structure.

[0048] In some other embodiments, the first rotating shaft 112 may also be disposed in the middle region of the first reflector body 111, and the first reflector body 111 may be driven to rotate by the rotating shaft structure disposed in the middle of the first reflector body 111, so as to realize the switching of the first reflector 110 between the first state 110a and the second state 110b.

[0049] In this embodiment, such as Figure 5As shown, in order to ensure the stability of the first reflector body 111 during rotation, the first reflector 110 can be equipped with a clamping structure 112B for support or clamping, so as to position and limit the first reflector body 111.

[0050] In some embodiments, the first driving member 113 drives the first rotating shaft 112 to rotate the first reflector body 111 during the driving period, and the driving period is less than or equal to 30 seconds.

[0051] In the above embodiments, by setting the driving period of the first rotating shaft 112 to less than or equal to 30 seconds, the first driving component 113 can only work for a short time during the state switching process of the first reflector 110, thereby avoiding the problem of heat accumulation caused by the long-term continuous operation of the first driving component 113.

[0052] As an example, in some specific application scenarios (such as automotive applications), the actual duration for which the first drive component 113 drives the first rotating shaft 112 to rotate during startup or sleep mode, thereby rotating the first reflector body 111, can be set to approximately 6 seconds. In this way, even under high ambient temperature conditions, the first drive component 113 can operate stably, avoiding performance degradation due to temperature rise, thus improving the reliability of the optical adjustment components in high-temperature environments.

[0053] In an example of an optical adjustment assembly applied to a head-up display (HUD), unlike conventional HUDs that require a large mirror to rotate at a large angle when switching between sleep and operating states, the second mirror 120 only adjusts within a small angle range (e.g., 3°) in a reference state, without needing to rotate during the switching process. The first mirror 110 switches between a first state 110a and a second state 110b, i.e., between two defined states: an operating position and a sleep position, without requiring precise angle adjustment.

[0054] When optical adjustment components are applied to a head-up display (HUD), the first reflector 110 can be referred to as a small reflector, and the second reflector 120 as a large reflector. The first reflector 110 has a relatively small structural size and weight, and its rotation is only used for state switching rather than image height adjustment. Therefore, the requirements for the first rotating shaft 112 in terms of accuracy, stability, and torque are significantly reduced, enabling the first reflector 110 to complete rotation and reach the target position in a very short time, for example, a driving period of less than or equal to 30 seconds, thereby greatly shortening the startup and sleep response time of the HUD.

[0055] As an example, in some practical application scenarios, the driving period of the first rotating shaft 112 can be further shortened to about 6 seconds, but this application is not limited to this.

[0056] Please continue reading. Figure 1 and Figure 3 In some embodiments, the second reflector 120 includes a second reflector body 121, a second rotating shaft 122, and a second driving member 123.

[0057] In this embodiment, the second rotating shaft 122 is disposed on the second reflector body 121, and the second driving member 123 is used to drive the second rotating shaft 122 to rotate. The rotation of the second rotating shaft 122 drives the second reflector body 121 to rotate, so that the second reflector 120 rotates in the reference state.

[0058] In the foregoing embodiment, the second driving member 123 drives the second rotating shaft 122 to rotate, so that the second rotating shaft 122 can drive the second reflector body 121 to rotate, so that the second reflector 120 rotates in the reference state. The first reflector 110 and the second reflector 120 are driven by their respective driving members, and their driving processes are independent of each other and do not affect each other. For example, the above-described optical adjustment assembly can enable the image height adjustment performed by the second reflector 120 and the sleep / wake-up operation performed by the first reflector 110 to be completed separately.

[0059] It should be noted that in the above embodiments, although the first reflector 110 and the second reflector 120 are respectively provided with driving components, the overall driving workload corresponding to image height adjustment and sleep / wake-up does not increase. Instead, it is completed by different driving components at different times. Therefore, compared with the traditional solution, this embodiment does not lead to an increase in overall power consumption.

[0060] Furthermore, since the first reflector 110 is relatively small and lightweight, its corresponding driving component generates less power consumption and heat during actual operation. Even in scenarios such as startup or hibernation where the first reflector 110 needs to be driven, its working time is short and it is not easy to generate significant heat.

[0061] In some embodiments, such as Figure 1 and Figure 3 As shown, the optical adjustment assembly includes a first drive member 113, which drives the first rotating shaft 112 to rotate, thereby causing the first reflecting mirror 110 to switch between a first state 110a and a second state 110b. Furthermore, the optical adjustment assembly also includes a second drive member 123, which drives the second rotating shaft 122 to rotate, causing the second reflecting mirror 120 to rotate in a reference state, thereby completing the image height adjustment.

[0062] As an example, the first drive member 113 and / or the second drive member 123 can be implemented by a motor, such as a stepper motor or a DC motor; in some other embodiments, the drive member can also be other forms of drive or actuator, as long as it can provide the corresponding rotational driving force to drive the corresponding rotating shaft to rotate, and this application does not make specific limitations in this regard.

[0063] In some embodiments, the optical adjustment assembly may further include a control unit. The control unit is at least connected to the first reflector 110, in which case the first reflector 110 may be configured to switch from a first state 110a to a second state 110b in response to a first control signal issued by the control unit; and the first reflector 110 may switch from the second state 110b to the first state 110a in response to a second control signal issued by the control unit.

[0064] Please see Figure 6 As an example, the control unit 210 can be connected to the first rotating shaft 112 and drive the first reflector body 111 to switch between the first state 110a and the second state 110b through the first rotating shaft 112.

[0065] Specifically, during the power-on startup phase of the head-up display device, the control unit 210 outputs a first control signal and transmits it to the first rotating shaft 112. Upon receiving the first control signal, the first rotating shaft 112 performs a mechanical action (e.g., rotation), causing the first reflector body 111 to switch from a first state 110a (non-working angle) to a second state 110b (working angle). During the power-off sleep phase of the head-up display device, the control unit 210 outputs a second control signal and transmits it to the first rotating shaft 112. Upon receiving the second control signal, the first rotating shaft 112 operates again, switching the first reflector body 111 from the second state 110b back to the first state 110a.

[0066] In some embodiments, the control unit is also connected to the second reflector 120, in which case the second reflector 120 can be configured to adjust to a reference state in response to a third control signal issued by the control unit.

[0067] Please see Figure 7 As an example, the control unit 210 can be connected to the second rotating shaft 122, and the second reflector body 121 can be adjusted to the reference state through the second rotating shaft 122.

[0068] Specifically, when the head-up display performs the image height adjustment function, the control unit 210 outputs a third control signal and transmits it to the second rotating shaft 122. After receiving the third control signal, the second rotating shaft 122 performs a mechanical action (e.g., rotation), driving the second reflector body 121 to make fine adjustments until it reaches a reference state that matches the height of the target image.

[0069] For example, the control unit 210 described above can be a microcontroller unit (MCU) 210, used to generate the aforementioned first control signal and second control signal. Of course, this application is not limited to this, and the control unit 210 can also be other control circuits or control modules capable of implementing control functions.

[0070] Please see Figure 8 Understanding this, when the optical adjustment component receives a sleep or start signal input, the MCU generates and sends a first control signal or a second control signal to the first rotating shaft 112. The first rotating shaft 112 drives the first reflector body 111 to rotate, causing the first reflector 110 to be adjusted to the second state 110b or the first state 110a accordingly. After adjustment, the first rotating shaft 112 can perform a locking action to maintain the current state of the first reflector 110.

[0071] Please see Figure 9 Understanding this, when the optical adjustment component receives a gear adjustment signal input, the MCU generates and sends a third control signal to the second rotating shaft 122. The second rotating shaft 122 drives the second reflector body 121 to make fine adjustments in the reference state. After adjustment, the second rotating shaft 122 can also perform a locking action to maintain the current position of the second reflector 120 and ensure the stability of the image display.

[0072] It is understandable that the driving components of the first reflector 110 and the second reflector 120 can be optimized based on their functional and dimensional differences. For example, since the second reflector 120 only requires fine-tuning in a reference state and does not need to undergo large-angle rotation, the working angle of the second shaft 122 can be reduced. For example, when the second shaft 122 adopts a worm-worm gear transmission method, the worm length and the effective number of teeth of the worm gear can be reduced accordingly.

[0073] When the optical adjustment component is applied to a head-up display device, the second reflector 120 (large reflector) is larger and heavier, but since it only needs to rotate slightly, its motor torque requirement is smaller. Therefore, a smaller motor or a smaller torque can be used, and the noise generated during the adjustment process is also lower, and the adjustment time is also shorter.

[0074] Specifically, since the structural size and overall weight of the first reflector 110 (small reflector) are smaller than those of the second reflector 120 (large reflector), for example, the second reflector 120 (large reflector) weighs approximately 500g while the first reflector 110 (small reflector) weighs approximately 200g, the torque requirement of the drive structure is further reduced when the first reflector 110 (small reflector) switches between sleep and working states. For example, a smaller motor can be used. Therefore, the mechanical noise generated by the first reflector 110 during the drive process is relatively small during sleep and startup, and due to its short state switching time, the corresponding noise duration is also significantly shortened.

[0075] In contrast, the first reflector 110 (small reflector) is smaller and lighter, but only needs to switch between a preset first state 110a and a second state 110b to prevent backlighting in the dormant state. The first rotating shaft 112 does not need to precisely adjust the height of the virtual image, therefore its implementation is more flexible; it can employ simple mechanical structures such as linkage mechanisms, cam mechanisms, or gear mechanisms. At the same time, the requirements for the arrangement of the first rotating shaft 112 are relatively relaxed. For example… Figure 4 As shown, when the first reflector body 111 includes flat glass, a rotating shaft can be provided on the side. Figure 4 (Not shown in the image) serves as the first pivot 112 and is positioned via a U-shaped groove 112A, eliminating the need for additional complex structures and thus reducing manufacturing costs.

[0076] According to some embodiments, this application also provides a method for controlling an optical adjustment component. This method is applicable to the optical adjustment component in any of the foregoing embodiments. Therefore, the technical effects achievable by the aforementioned optical adjustment component can also be achieved by this method, and will not be detailed here.

[0077] Please see Figure 10 In some embodiments, the first reflector 110 includes a first reflector body 111, a first rotating shaft 112, and a first driving member 113. In this embodiment, the optical adjustment component control method may specifically include the following steps S110~S120: S110: In the first working mode, a first control signal is acquired and sent to the first drive unit 113. The first drive unit 113 responds to the first control signal to drive the first rotating shaft 112 to rotate. The first rotating shaft 112 rotates and drives the first reflector body 111 to rotate, so that the first reflector 110 switches from the first state 110a to the second state 110b.

[0078] S120: In the first working mode, a second control signal is acquired and sent to the first drive unit 113. The first drive unit 113 responds to the second control signal to drive the first rotating shaft 112 to rotate. The rotation of the first rotating shaft 112 drives the first reflector body 111 to rotate, so that the first reflector 110 switches from the second state 110b to the first state 110a.

[0079] Through the above-described optical adjustment component control method, during the switching process of the optical adjustment component from working state to sleep state, corresponding control signals can be obtained in the first working mode to drive the first driving component 113 to work, thereby controlling the rotation of the first rotating shaft 112, and thus driving the first reflector 110 to switch between the first state 110a and the second state 110b.

[0080] Specifically, when step S110 is executed, the first reflector 110 switches from the first state 110a to the second state 110b, thereby changing the reflection path. This causes the external sunlight flowing back into the head-up display device to deviate from the original imaging light path and be guided outside the display screen in the dormant state, thus protecting the display screen. When step S120 is executed, the first reflector 110 switches from the second state 110b back to the first state 110a to restore the normal imaging light path.

[0081] Therefore, the above-mentioned optical adjustment component control method can achieve the anti-backflow control effect corresponding to the aforementioned optical adjustment component by switching the state of the first reflector 110, and the first reflector 110 switches between two defined states in the first working mode without the need for continuous angle adjustment.

[0082] It should be noted that the first reflector 110 can independently complete the backflow prevention function in the first working mode without real-time monitoring and is not affected by power outages during hibernation. Therefore, the above-mentioned optical adjustment component control method has high reliability.

[0083] It should be understood that, although Figure 10 The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order in which these steps are executed, and they can be performed in other orders. Figure 10 At least some of the steps in the process may include multiple steps or multiple stages.

[0084] In some embodiments, the second reflector 120 includes a second reflector body 121, a second rotating shaft 122, and a second driving member 123. In this embodiment, the optical adjustment assembly control method may further include the following steps: In the second working mode, a third control signal is acquired and sent to the second drive unit 123. The second drive unit 123 responds to the third control signal to drive the second rotating shaft 122 to rotate. The rotation of the second rotating shaft 122 drives the second reflector body 121 to rotate, so that the second reflector 120 rotates in the reference state.

[0085] Since the rotation of the second reflector 120 is only used for image position adjustment in the working state and does not participate in the state switching during the sleep and wake-up process, the large-angle rotation of the second reflector 120 during the sleep and wake-up process can be avoided, reducing its rotation frequency and mechanical wear, which is beneficial to extending the service life of the second reflector 120 and improving the stability during the image adjustment process.

[0086] As an example, after adjustment is completed, the second reflector 120 can remain in the set position, that is, lock the angle, to ensure that the image position is stable during display, thereby improving the stability and reliability of the optical adjustment component.

[0087] In the aforementioned embodiments, the first operating mode corresponds to the switching between the sleep and wake-up states of the optical adjustment component. In this mode, the first reflector 110 is mainly controlled to complete the state switching to achieve the backflow prevention function. Correspondingly, the second operating mode corresponds to the optical adjustment component being in the working state. In the second operating mode, the second reflector 120 is mainly controlled to adjust the image position, such as fine-tuning the virtual image height.

[0088] It should be noted that the optical adjustment component control methods in the embodiments of this application are all applicable to the corresponding optical adjustment components. Therefore, the technical features between the method embodiments and the structural embodiments can be substituted and supplemented for each other without conflict, so that those skilled in the art can understand the technical content of this application.

[0089] It is understood that the optical adjustment component control method in this application embodiment can be applied to a head-up display device. In this case, the backflow prevention function of the optical adjustment component is mainly aimed at the sleep state of the head-up display device. If the head-up display device implements other protection strategies, the optical adjustment component control method in this application embodiment can still achieve the backflow prevention effect in the sleep state from the optical principle and is not affected by other protection strategies.

[0090] According to some embodiments, this application also provides a head-up display device. Please refer to... Figure 2 It is understood that the head-up display device includes the optical adjustment components provided in the foregoing embodiments.

[0091] In this head-up display device, the first reflector 110 can also be called a small reflector or a primary reflector, and the second reflector 120 can also be called a large reflector or a magnifying lens.

[0092] By employing the aforementioned optical adjustment components, the second reflector 120 undergoes only minor angle adjustments in the reference state for fine-tuning the image height. The function of preventing backlighting in the sleep state is achieved by the first reflector 110 switching between the first state 110a and the second state 110b. The head-up display device provided in this application assigns the task of large-angle state switching to the first reflector 110, effectively reducing the rotation frequency and wear of the second reflector 120, and thus extending its service life.

[0093] Meanwhile, since the driving structure of the first reflector 110 has lower requirements for precision, transmission smoothness, and torque compared to the second reflector 120, the accuracy of the working position and the sleep position can be ensured by structural limiting. The structural size and weight of the first reflector 110 are usually relatively small, so the first reflector 110 can use a smaller motor to complete the state switching at a faster speed, achieving low noise and fast response.

[0094] In some embodiments, the head-up display device may further include a Picture Generation Unit (PGU). The picture generation unit generates an image beam, which is reflected sequentially by a first reflector 110 and a second reflector 120 to a projection medium. The projection medium reflects the image beam propagated by the picture generation unit to generate a virtual image of the target for observation by the eyepiece.

[0095] In some embodiments, the image generation module has an operating state and a sleep state. The first reflector 110 can be configured to switch from a first state 110a to a second state 110b when the image generation module is in a sleep state, and to switch from the second state 110b to the first state 110a when the image generation module is in an operating state.

[0096] It is understandable that the second reflector 120 only needs to rotate when the image generation module is in operation in order to adjust the image position.

[0097] As can be seen from the above embodiments, the display module and display device provided by the present invention achieve at least the following beneficial effects: The optical adjustment component provided by the present invention includes a first reflector and a second reflector. The first reflector is disposed on a first transmission path of an image beam. The first reflector has a first state and a second state, and the second reflector has a reference state. The image beam is reflected by the first reflector in the first state to the second reflector, and is reflected by the second reflector in the reference state to the eyepiece. There is a first angle between the reflecting surface of the first reflector in the second state and the reflecting surface of the second reflector in the first state. The reflecting surface of the second reflector in the reference state is located between a first reference position and a second reference position. There is a second angle between the reflecting surface of the second reflector in the first reference position and the reflecting surface of the second reflector in the second reference position. The second angle is smaller than the first angle.

[0098] Because a first angle exists between the reflecting surface of the first mirror in the second state and the reflecting surface of the first mirror in the first state, and this first angle is greater than the second angle formed by the second mirror between the first reference position and the second reference position, the angle change to prevent external sunlight backflow is borne by the first mirror, while the second mirror only needs to operate within a smaller angle range, thus avoiding large-angle rotation of the second mirror. During imaging, the second mirror operates in the reference state, and its reflecting surface is always located between the first and second reference positions, with a relatively small range of angle change. This reduces wear caused by frequent rotation of the second mirror, which helps extend its service life. Furthermore, since the first mirror, which bears the larger angle change, does not need high-precision angle adjustment, but only needs to switch between the first and second states, the requirements for the first mirror in terms of accuracy, torque, and response speed are reduced, which helps to shorten the state switching time of the optical adjustment components.

[0099] Various modifications and variations can be made to this application without departing from its spirit or scope, which will be apparent to those skilled in the art. Therefore, this application is intended to cover modifications and variations falling within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the implementation methods provided in the embodiments of this application can be combined with each other without contradiction.

[0100] In the description of this specification, references to terms such as "some embodiments," "as an example," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0101] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features of the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0102] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An optical adjustment component, characterized in that, It includes a first reflector and a second reflector, wherein the first reflector is disposed on the first transmission path of the image beam; The first reflector has a first state and a second state, and the second reflector has a reference state. The image beam is reflected by the first reflector in the first state to the second reflector, and is reflected by the second reflector in the reference state to the eye box. There is a first angle between the reflecting surface of the first reflector in the second state and the reflecting surface of the first reflector in the first state. The reflecting surface of the second reflector in the reference state is located between the first reference position and the second reference position. There is a second angle between the reflecting surface of the second reflector in the first reference position and the reflecting surface of the second reflector in the second reference position. The second angle is smaller than the first angle.

2. The optical adjustment assembly according to claim 1, characterized in that, The first angle formed between the reflecting surface of the first reflector in the second state and the reflecting surface of the first reflector in the first state ranges from 10° to 20°.

3. The optical adjustment assembly according to claim 2, characterized in that, The second angle formed between the reflecting surface of the second mirror at the first reference position and the reflecting surface of the second mirror at the second reference position is less than or equal to 3°.

4. The optical adjustment assembly according to claim 1, characterized in that, The first reflector includes a first reflector body, a first rotating shaft, and a first driving member, wherein the first rotating shaft is disposed on the first reflector body; The first driving member is used to drive the first rotating shaft to rotate, and the rotation of the first rotating shaft drives the first reflector body to rotate, so that the first reflector switches between a first state and a second state.

5. The optical adjustment assembly according to claim 4, characterized in that, The first driving member drives the first rotating shaft to rotate the first reflector body during the driving period, and the driving period is less than or equal to 30 seconds.

6. The optical adjustment assembly according to claim 4, characterized in that, The second reflector includes a second reflector body, a second rotating shaft, and a second driving component, wherein the second rotating shaft is disposed on the second reflector body; The second driving member is used to drive the second rotating shaft to rotate, and the rotation of the second rotating shaft drives the second reflector body to rotate, so that the second reflector rotates in the reference state.

7. The optical adjustment assembly according to claim 1, characterized in that, The optical adjustment assembly further includes a control unit, which is at least connected to the first reflector; The first reflector is configured to switch from a first state to a second state in response to a first control signal issued by the control unit; In response to a second control signal issued by the control unit, the first reflector switches from a second state to a first state.

8. The optical adjustment assembly according to claim 7, characterized in that, The control unit is also connected to the second reflector; The second reflector is configured to adjust to a reference state in response to a third control signal issued by the control unit.

9. A method for controlling an optical adjustment component, characterized in that, The optical adjustment component control method is used to control the optical adjustment component as described in any one of claims 1 to 8.

10. The optical adjustment component control method according to claim 9, characterized in that, The first reflector includes a first reflector body, a first rotating shaft, and a first driving component; The control method includes: In the first working mode, a first control signal is acquired and sent to the first driving member. The first driving member responds to the first control signal to drive the first rotating shaft to rotate. The rotation of the first rotating shaft drives the first reflector body to rotate, so that the first reflector switches from the first state to the second state. In the first working mode, a second control signal is acquired and sent to the first driving member. The first driving member responds to the second control signal to drive the first rotating shaft to rotate. The rotation of the first rotating shaft drives the first reflector body to rotate, so that the first reflector switches from the second state to the first state.

11. The optical adjustment component control method according to claim 9, characterized in that, The second reflector includes a second reflector body, a second rotating shaft, and a second driving component; In the second operating mode, a third control signal is acquired and sent to the second drive unit. The second drive unit responds to the third control signal to drive the second rotating shaft to rotate. The rotation of the second rotating shaft drives the second reflector body to rotate, so that the second reflector rotates in the reference state.

12. A head-up display device, characterized in that, Includes the optical adjustment component as described in any one of claims 1 to 8.

13. The head-up display device according to claim 12, characterized in that, The head-up display device also includes an image generation module; The image generation module generates an image beam, which is reflected sequentially by the first and second reflectors to the projection medium. The projection medium reflects the image beam propagated by the image generation module, generating a target image for observation by the eye box.

14. The head-up display device according to claim 12, characterized in that, The image generation module has a working state and a sleep state; The first reflector is configured to switch from a first state to a second state when the image generation module is in a dormant state, and to switch from the second state to the first state when the image generation module is in an active state.

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