Head-up display, protection method thereof and vehicle

Abstract

The invention provides a head-up display, a protection method thereof and a vehicle. The head-up display comprises a display device, a reflection device, a moving device and a rotating device. The reflecting device is arranged on the light emitting side of the display device, and the rotating device is connected with the reflecting device; wherein the display device is configured to generate light rays; the reflecting device is configured to reflect light; the moving device is configured to control the display device and the reflection device to translate when sunlight of the head-up display flows backwards, the translation direction of the display device is the same as that of the reflection device in the translation process, and the translation distance of the display device is equal to that of the reflection device; and the rotating device is configured to control the reflection device to rotate when the sunlight of the head-up display flows backwards. When sunlight flows backwards, the head-up display does not need to be protected by adopting a brightness reduction mode, and the defect of adopting the brightness reduction mode is avoided.

Description

Technical Field

[0001] This application relates to the field of head-up display technology, specifically to a head-up display and its protection method, and a means of transportation. Background Technology

[0002] Head-up displays (HUDs) are important in-vehicle display devices that project important driving information, such as vehicle speed and navigation instructions, onto the windshield in front of the driver, allowing the driver to obtain key information without taking their eyes off the road, thereby effectively improving driving safety.

[0003] However, in actual use, sunlight backflow has always been a key factor affecting the performance and reliability of HUDs. When sunlight enters the optical system of a HUD at a specific angle, it generates a strong focused spot inside the HUD. Since HUDs typically contain light-sensitive components such as displays and optical lenses, the high energy carried by these focused spots can cause a sharp increase in the local temperature of the components, leading to screen burn-in and severely damaging the performance and lifespan of the HUD.

[0004] The current industry standard for addressing screen burn-in caused by sunlight backflow is to reduce the brightness of the HUD. Reducing brightness decreases the amount of light energy entering the HUD, thus mitigating the risk of thermal damage to components from the focused light spot. However, this method has significant drawbacks. While driving, drivers rely on the information displayed on the HUD to make timely and accurate driving decisions. Lower brightness can lead to unclear information, especially in bright sunlight, making it difficult for drivers to quickly and accurately identify key information, increasing driving difficulty and risk, and failing to meet users' demands for high-quality, clear displays. Therefore, there is an urgent need for a solution that effectively solves the screen burn-in problem caused by sunlight backflow while maximizing the customer experience. Summary of the Invention

[0005] This application provides a head-up display and its protection method, as well as a vehicle, which eliminates the need to reduce brightness to protect the head-up display when sunlight backflows, thus avoiding the drawbacks of using brightness reduction methods.

[0006] In a first aspect, embodiments of this application provide a head-up display (HUD), including a display device, a reflective device, a moving device, and a rotating device; the reflective device is disposed on the light-emitting side of the display device, and the rotating device is connected to the reflective device; wherein, the display device is configured to generate light; the reflective device is configured to reflect the light; the moving device is configured to control the display device and the reflective device to translate when the HUD experiences backlighting, and during the translation process, the translation direction of the display device and the translation direction of the reflective device are the same, and the translation distance of the display device is equal to the translation distance of the reflective device; the rotating device is configured to control the reflective device to rotate when the HUD experiences backlighting.

[0007] In one or more embodiments, the moving device is further configured to control the display device and the reflecting device to translate and reset when the head-up display is turned off; the rotating device is configured to control the reflecting device to rotate and reset when the head-up display is turned off.

[0008] In one or more embodiments, the head-up display further includes a housing; the housing has a receiving space, in which the display device and the reflective device are both disposed, and the moving device is connected to the housing; the moving device is configured to control the housing to translate when sunlight backflows onto the head-up display, so as to translate the display device and the reflective device.

[0009] In one or more embodiments, the mobile device is further configured to control the housing to translate and reset when the head-up display is turned off, so that the display device and the reflective device translate and reset.

[0010] In one or more embodiments, the reflecting device includes a first reflecting mirror and a second reflecting mirror; the first reflecting mirror is disposed on the light-emitting side of the display device, and the second reflecting mirror is disposed on the propagation path of the light reflected by the first reflecting mirror; the rotating device is connected to the second reflecting mirror, and the rotating device is configured to control the rotation of the second reflecting mirror when sunlight backflows into the head-up display.

[0011] In one or more embodiments, the mobile device is configured to, when sunlight streams back onto the head-up display, control the display device to translate from a first working position to a second working position, and control the reflective device to translate from a third working position to a fourth working position; or, control the display device to translate from the second working position to the first working position, and control the reflective device to translate from the fourth working position to the third working position.

[0012] In one or more embodiments, the head-up display further includes a parameter acquisition device; the parameter acquisition device is electrically connected to the moving device and the rotating device; wherein the parameter acquisition device is configured to acquire internal parameters of the head-up display, determine whether the head-up display is experiencing backlighting based on the internal parameters, and when it is determined that the head-up display is experiencing backlighting, send a translation command to the moving device and a rotation command to the rotating device; the moving device is configured to control the translation of the display device and the reflector based on the translation command; the rotating device is configured to control the rotation of the reflector based on the rotation command.

[0013] Secondly, embodiments of this application provide a means of transportation, which includes a windshield and a head-up display as described in any of the first aspects; the windshield is disposed on the light-emitting side of the head-up display.

[0014] Thirdly, embodiments of this application provide a protection method for a head-up display, applied to a head-up display as described in any of the second aspects, the protection method comprising: acquiring internal parameters of the head-up display; determining that the head-up display is experiencing backlighting if the internal parameters meet preset conditions; and controlling the display device and the reflector to translate and rotate when the head-up display determines that backlighting is occurring.

[0015] In one or more embodiments, the protection method further includes: obtaining the working state of the head-up display; if the working state is a power-off state, controlling the display device and the reflector to translate and reset, and controlling the reflector to rotate and reset.

[0016] The beneficial effects of this application are as follows: This application provides a head-up display and its protection method, as well as a vehicle, including a display device, a reflective device, a moving device, and a rotating device; the reflective device is disposed on the light-emitting side of the display device, and the rotating device is connected to the reflective device; wherein, the display device is configured to generate light; the reflective device is configured to reflect light; the moving device is configured to control the translation of the display device and the reflective device when sunlight backflows into the head-up display, and during the translation process, the translation direction of the display device and the translation direction of the reflective device are the same, and the translation distance of the display device is equal to the translation distance of the reflective device; the rotating device is configured to control the rotation of the reflective device when sunlight backflows into the head-up display. When sunlight backflows into the head-up display, by controlling the translation of the display device and the reflective device and controlling the rotation of the reflective device, the head-up display is protected, and the user can still normally observe the virtual image, ensuring a good user experience during sunlight backflow. This head-up display does not need to reduce brightness for protection, avoiding the drawbacks of using brightness reduction methods. Attached Figure Description

[0017] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0018] Figure 1 A structural block diagram of a head-up display provided in an embodiment of this application; Figure 2 A structural diagram of a head-up display provided in an embodiment of this application; Figure 3 A structural diagram of another head-up display provided in an embodiment of this application; Figure 4 A structural diagram of another head-up display provided in this application embodiment; Figure 5 A flowchart illustrating a protection method provided in an embodiment of this application. Detailed Implementation

[0019] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "electrically connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "inner," "outer," "bottom," etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items. Furthermore, technical features involved in the different embodiments of this application described below may be combined with each other as long as they do not conflict with each other.

[0021] In a first aspect, embodiments of this application provide a head-up display, see [reference]. Figure 1 The head-up display 100 includes a display device 10, a reflection device 20, a moving device 30, and a rotating device 40.

[0022] A reflecting device 20 is located on the light-emitting side of the display device 10, and a rotating device 40 is connected to the reflecting device 20. The display device 10 is configured to generate light L1. The reflecting device 20 is configured to reflect light L1. A moving device 30 is configured to control the translation of the display device 10 and the reflecting device 20 when sunlight backflows into the head-up display 100, wherein during the translation, the translation direction of the display device 10 and the translation direction of the reflecting device 20 are the same, and the translation distance of the display device 10 is equal to the translation distance of the reflecting device 20. The rotating device 40 is configured to control the rotation of the reflecting device 20 when sunlight backflows into the head-up display 100.

[0023] Display device 10 refers to a device used to generate light L1 carrying image information.

[0024] The reflecting device 20 refers to a device that reflects light ray L1 based on the law of reflection. The reflecting device 20 may include at least one reflective optical element selected from prisms, mirrors, and gratings, used to change the propagation direction of light ray L1 through reflection. The number of elements can be set according to actual needs. Taking a mirror as an example, the reflecting device 20 may include at least one mirror, which can be used to reflect light ray L1 so that light ray L1 can exit normally. When subsequently applied in vehicles, light ray L1 can be reflected to the windshield 200, and then reflected by the windshield 200 to a preset eye-box position 300. When the user's eye is at the preset eye-box position 300, the user can observe image information. See also... Figure 2 The preset eye box position 300 is a pre-set area when the head-up display 100 is applied to a vehicle. When the human eye is in this area, the normal and complete virtual image S can be observed. When the human eye deviates from this area, the normal and complete virtual image S cannot be observed.

[0025] The moving device 30 refers to the device that translates the display device 10 and the reflecting device 20. It should be noted that during the translation process controlled by the moving device 30, the translation direction and distance of the display device 10 and the reflecting device 20 are the same. That is, the relative positional relationship between the display device 10 and the reflecting device 20 remains unchanged; in other words, their spatial positional relationship remains fixed, and they will not undergo relative rotation, tilting, or changes in distance. The moving device 30 may include mechanical structures such as motors, and can employ any existing moving device 30 used to control the translational movement of the display device 10 and the reflecting device 20; no limitation is made here. The translation direction can be the forward direction or the reverse direction of the vehicle.

[0026] The rotating device 40 refers to the component that rotates the reflecting device 20. The rotating device 40 may include mechanical structures such as a motor, and may employ any existing rotating device 40 for controlling the rotation of the reflecting device 20; no limitation is made here. The rotation direction and angle of the reflecting device 20 can be set according to actual needs and are not limited here.

[0027] When sunlight shines back onto the head-up display 100, the moving device 30 will translate the display device 10 and the reflecting device 20, causing their working positions to shift. During the translation, the relative positional relationship between the display device 10 and the reflecting device 20 remains unchanged. Then, after the translation, the rotating device 40 will rotate the reflecting device 20, for example, by rotating it around its rotation center by a certain angle. It is understood that after the translation of the display device 10 and the reflecting device 20, the position where the light ray L1 emitted from the head-up display 100 reaches the windshield 200 will change, thus changing the propagation direction of the light ray L1 after reflection by the windshield 200. Figure 2 and Figure 3 As shown, after the two are translated, the position of light L1 reaching the windshield 200 changes from position A to position B. At this time, light L1 cannot reach the preset eye box position 300. In order for the human eye to be able to normally observe the image information when in the preset eye box position 300, the rotating device 40 will rotate the reflecting device 20 when sunlight backflow occurs, so that the position of light L1 emitted from the head-up display 100 reaching the windshield 200 returns to position A. Figure 4 As shown, this allows light L1 to be reflected by the windshield 200 and return to the preset eye box position 300. Furthermore, since the reflector 20 has rotated a certain angle, the propagation direction of the backflowing external light L2 (such as the light generated by the sun 400) can be changed, preventing the backflowing external light L2 from being reflected to the display device 10, thereby protecting the head-up display 100.

[0028] It is evident that when sunlight shines back, this head-up display does not need to reduce brightness, thus avoiding the drawbacks of reducing brightness. By controlling the translation of the display device and the reflector and controlling the rotation of the reflector, the head-up display can be protected, while ensuring that the user can still observe the virtual image S normally, thus ensuring the user experience during sunlight backflow.

[0029] In some embodiments, the moving device 30 is also configured to control the display device 10 to translate and reset, and control the reflective device 20 to translate and reset when the head-up display 100 is turned off; the rotating device 40 is configured to control the reflective device 20 to rotate and reset when the head-up display 100 is turned off.

[0030] Translation reset of display device 10 means that display device 10 returns to a first initial translation position by translation, which is the position of display device 10 before the translation. Translation reset of reflective device 20 means that reflective device 20 returns to a second initial translation position by translation, which is the position of reflective device 20 before the translation. Rotation reset of reflective device 20 means that reflective device 20 returns to an initial posture by rotation, which is the posture of reflective device 20 before the rotation.

[0031] In this embodiment, by controlling the display device 10 and the reflective device 20 to reset when the power is off, it can be ensured that they are in the same position every time the power is turned on, which helps to maintain the stability and consistency of the display effect and avoid image distortion or display abnormalities caused by positional deviations. At the same time, the rotation and reset of the reflective device 20 ensures the accuracy of its reflection angle, so that the light L1 can propagate along the predetermined path, further ensuring the clarity and accuracy of the display effect.

[0032] In some of these embodiments, see Figure 1 and Figure 2 The head-up display 100 also includes a housing 50; the housing 50 has a receiving space, in which the display device 10 and the reflector 20 are both disposed, and a moving device 30 is connected to the housing 50; the moving device 30 is configured to control the housing 50 to translate when sunlight backflows into the head-up display 100, so that the display device 10 and the reflector 20 translate, and during the translation process, the translation direction of the display device 10 and the translation direction of the reflector 20 are the same, and the translation distance of the display device 10 is equal to the translation distance of the reflector 20.

[0033] The housing 50 refers to the protective casing of the head-up display 100, which has an internal receiving space to provide an environment for accommodating and supporting the display device 10 and the reflector 20. The display device 10 is fixedly installed within the housing 50, while the reflector 20 is rotatably installed within the housing 50. The shape of the housing 50 can be configured according to actual needs and is not limited here. It is understood that the housing 50 has a light-emitting port through which light L1 is emitted.

[0034] In this embodiment, when sunlight shines back onto the head-up display 100, the moving device 30 can move the display device 10 and the reflective device 20 simply by translating the housing 50. This reduces the number of mechanical structures required by the moving device 30 and eliminates the need for additional moving structures inside the housing 50, effectively reducing the size of the housing 50. Furthermore, the housing 50 provides a safe working environment for the display device 10 and the reflective device 20, helping to prevent damage to internal components from external factors (such as dust, moisture, physical impact, etc.), thereby extending the service life of the head-up display 100.

[0035] In some embodiments, the mobile device 30 is also configured to control the housing 50 to translate and reset when the head-up display 100 is turned off, so as to translate and reset the display device 10 and the reflector 20.

[0036] The translational reset of the housing 50 refers to the housing 50 returning to the third initial translational position by translation. The third initial translational position is the position of the housing 50 before the translation. When the housing 50 is in the third initial translational position, the display device 10 is in the first initial translational position and the reflective device 20 is in the second initial translational position. In this embodiment, by controlling the translational reset of the housing 50, the display device 10 and the reflective device 20 are also translated and reset, reducing the number of moving structures required for reset.

[0037] In some of these embodiments, see Figure 2 The reflecting device 20 includes a first reflecting mirror 21 and a second reflecting mirror 22. The first reflecting mirror 21 is located on the light-emitting side of the display device 10, and the second reflecting mirror 22 is located on the propagation path of the light L1 reflected by the first reflecting mirror 21. The rotating device 40 is connected to the second reflecting mirror 22 and is configured to control the rotation of the second reflecting mirror 22 when sunlight backflow occurs in the head-up display 100.

[0038] The surfaces of the first reflector 21 and the second reflector 22 are coated with a high-reflectivity film, which can be used to reflect light L1. For example, the first reflector 21 and the second reflector 22 can be aluminum reflectors, which include a glass substrate and an aluminum film coated on the surface of the glass substrate. In this way, the aluminum reflector can be used to reflect light L1.

[0039] Furthermore, the surfaces of the first reflecting mirror 21 and the second reflecting mirror 22 can be planar or curved, and the curved surface can be a free-form surface, etc. In this way, the surfaces of the first reflecting mirror 21 and the second reflecting mirror 22 can be designed to shape the first ray L1 and correct aberrations. In this application, the surface type of the first reflecting mirror 21 is planar, and the surface type of the second reflecting mirror 22 is curved.

[0040] Specifically, the second reflector 22 is rotatably mounted within the housing 50, see reference. Figure 4 The rotating device 40 can control the second reflector 22 to rotate around the rotation center O, so as to change the propagation direction of the external light L1 after being reflected by the reflecting device 20. The rotation center O refers to the axis around which the second reflector 22 rotates during the rotation process. Its rotation direction can be set according to actual needs and is not limited here.

[0041] In this embodiment, by setting the first reflector 21 and the second reflector 22, the display effect and display position of the head-up display 100 can be adjusted by adjusting the surface type and position of the reflectors, thereby improving the design flexibility of the head-up display 100.

[0042] In some embodiments, the mobile device 30 is configured to control the display device 10 to translate from a first working position to a second working position and control the reflector 20 to translate from a third working position to a fourth working position when sunlight backflows into the head-up display 100; or, control the display device 10 to translate from the second working position to the first working position and control the reflector 20 to translate from the fourth working position to the third working position.

[0043] The first working position can be a first initial translation position, and the third working position can be a second initial translation position. The translation direction of the display device 10 when it moves from the first working position to the second working position is the same as the translation direction of the reflective device 20 when it moves from the third working position to the fourth working position, and the translation distance of the display device 10 when it moves from the first working position to the second working position is equal to the translation distance of the reflective device 20 when it moves from the third working position to the fourth working position. Similarly, the translation direction of the display device 10 when it moves from the second working position to the first working position is the same as the translation direction of the reflective device 20 when it moves from the fourth working position to the third working position, and the translation distance of the display device 10 when it moves from the second working position to the first working position is equal to the translation distance of the reflective device 20 when it moves from the fourth working position to the third working position.

[0044] For example, in Figure 2 In the illustrated embodiment, when the reflector 20 is in the third working position, the first reflector 21 is in the first working sub-position and the second reflector 22 is in the second working sub-position. When the reflector 20 is in the fourth working position, the first reflector 21 is in the third working sub-position and the second reflector 22 is in the fourth working position. After the system is powered on, the display device 10 is in the first working position and the reflector 20 is in the third working position. If a first instance of sunlight backflow occurs at this time, the external light L2 generated by the sun 400 will penetrate the windshield 200 and be reflected and focused onto the display device 10 by the second reflector 22 and the first reflector 21 in sequence, thereby burning the display device 10. At this time, refer to Figure 3 The moving device 30 in the head-up display 100 translates the control housing 50 in the direction of travel of the vehicle, causing the display device 10 to translate from a first working position to a second working position, and causing the first reflector 21 to translate from a first working sub-position to a third working sub-position, and the second reflector 22 to translate from a second working sub-position to a fourth working sub-position. Then, refer to... Figure 4 The rotating device 40 in the head-up display 100 controls the second reflector 22 to rotate clockwise around the rotation center O by a preset angle. In this way, the external light L2 cannot reach the display device 10 after passing through the second reflector 22 and the first reflector 21, thereby preventing the external light L2 from focusing on the display device 10 and protecting the display device 10.

[0045] Among them, after translating the housing 50 (display device 10 and reflective device 20), as Figure 2 and Figure 3 As shown, the position of light ray L1 reaching the windshield 200 changes from position A to position B. At this time, light ray L1 cannot reach the preset eye box position 300. In order for the human eye to be able to normally observe the image information when in the preset eye box position 300, the rotating device 40 needs to rotate the second reflector 22 to make the position of light ray L1 emitted from the head-up display 100 reaching the windshield 200 return to position A, as shown. Figure 4 As shown, this allows light L1 to be reflected by the windshield 200 and return to the preset eye box position 300. Furthermore, since the second reflector 22 has been rotated by a preset angle, the propagation direction of the backflowing external light L2 can be changed, preventing the backflowing external light L2 from being reflected to the display device 10, thereby protecting the head-up display 100.

[0046] As time goes by, if the head-up display 100 experiences a second backflow of sunlight after the translation of the display device 10 and the reflector 20, and after the rotation of the second reflector 22, the moving device 30 will control the housing 50 to translate in the reverse direction of the vehicle, so that the display device 10 is translated from the second working position to the first working position, and the first reflector 21 is translated from the third working position to the first working position, and the second reflector 22 is translated from the fourth working position to the second working position, so that the display device 10 and the reflector 20 return to the position where the first backflow of sunlight occurred. At the same time, the rotating device 40 will control the second reflector 22 to rotate counterclockwise around the rotation center O by a preset angle, so that the external light L2 cannot be focused on the display device 10, thereby protecting the display device 10. It is also understood that the light L1 emitted by the head-up display 100 will return to position A.

[0047] As can be seen, in this embodiment, the above method can protect the display device 10 when sunlight shines back, and ensure normal head-up display.

[0048] In some embodiments, the display device 10 includes an image generation unit (PGU); the reflective device 20 is disposed on the light-emitting side of the image generation unit.

[0049] The image generation unit may include one of the following devices: liquid crystal display (LCD), light-emitting diode (LED), and organic light-emitting diode display (OLED). In practical applications, one of the above devices can be selected as the display device 10 based on actual needs, thereby improving design flexibility.

[0050] In some embodiments, the head-up display 100 further includes a parameter acquisition device electrically connected to the moving device 30 and the rotating device 40. The parameter acquisition device is configured to acquire internal parameters of the head-up display 100, determine whether the head-up display 100 is experiencing backlighting based on these parameters, and, upon determining that backlighting is occurring, send a translation command to the moving device 30 and a rotation command to the rotating device 40. The moving device 30 is configured to control the translation of the display device 10 and the reflector 20 based on the translation command. The rotating device 40 is configured to control the rotation of the reflector 20 based on the rotation command.

[0051] The internal parameters include at least one parameter such as the intensity of external light L2 incident on the head-up display 100 and the surface temperature of the display screen.

[0052] In some embodiments, the parameter acquisition device includes a sensor and a controller, the controller being electrically connected to the sensor, the moving device 30, and the rotating device 40. The sensor is configured to acquire internal parameters of the head-up display 100, and the controller is configured to determine, based on the internal parameters, whether the head-up display 100 is experiencing backlighting, and, upon determining that backlighting is occurring, to send a translation command to the moving device 30 and a rotation command to the rotating device 40.

[0053] Specifically, the sensors include temperature sensors and light intensity sensors. Temperature sensors can be devices such as thermistors, while light intensity sensors can be devices such as photoresistors, photodiode power meters, illuminometers, and solar irradiance meters. The controller can be a suitable data processor such as a microcontroller. The temperature sensor can be located on the surface of the display screen in the display device 10, and it can acquire the surface temperature of the display screen in the display device 10. The light intensity sensor can be located on the propagation path of the external light ray L2 incident on the interior of the head-up display 100, and it can acquire the intensity of the external light ray L2 incident on the interior of the head-up display 100. The controller obtains the light intensity of the external light L2 incident on the interior of the head-up display 100 and the surface of the display screen in the display device 10 through sensors; and determines that the head-up display 100 is experiencing sunlight backflow when the light intensity of the external light L2 incident on the interior of the head-up display 100 is greater than or equal to a preset intensity, and / or when the temperature of the display device 10 is greater than or equal to a preset temperature; and when it is determined that the head-up display 100 is experiencing sunlight backflow, sends a translation command to the moving device 30 and a rotation command to the rotating device 40, causing the moving device 30 to translate the display device 10 and the reflecting device 20, and causing the rotating device 40 to rotate the reflecting device 20.

[0054] In this embodiment, the parameter acquisition device can determine whether the head-up display 100 is experiencing backlighting, and multiple parameters can be used to determine whether backlighting has occurred, thereby improving the accuracy and reliability of the judgment.

[0055] Secondly, embodiments of this application provide a means of transportation that includes a head-up display as described in any of the first aspects.

[0056] In this embodiment, the head-up display has the same structure and function as the head-up display described in any of the first aspects, and will not be repeated here. The means of transportation may be a car, ship, airplane, etc.

[0057] In some embodiments, the vehicle also includes a windshield 200; the windshield 200 is disposed on the light-emitting side of the head-up display 100.

[0058] Specifically, taking an LCD as the display device 10 and a reflective device 20 including a first reflector 21 and a second reflector 22 as an example, see [reference needed]. Figure 2 After the system is powered on, the display device 10 is in the first working position, the first reflector 21 is in the first working sub-position, and the second reflector 22 is in the second working sub-position. After the display device 10 generates light L1 with image information, the light L1 is reflected by the first reflector 21, magnified by the second reflector 22, and finally reflected by the windshield 200 and enters the preset eye box position 300. When the human eye is in the preset eye box position 300, the virtual image S in front can be observed.

[0059] If the first instance of sunlight backflow occurs at this time, refer to... Figure 1 External rays L2 generated by the sun 400 will penetrate the windshield 200 and be reflected and focused onto the display device 10 by the second reflector 22 and the first reflector 21, thereby burning the display device 10. At this time, refer to... Figure 3 The moving device 30 in the head-up display 100 translates the control housing 50 in the direction of travel of the vehicle, causing the display device 10 to translate from a first working position to a second working position, and causing the first reflector 21 to translate from a first working sub-position to a third working sub-position, and the second reflector 22 to translate from a second working sub-position to a fourth working sub-position. Then, refer to... Figure 4 The rotating device 40 in the head-up display 100 controls the second reflector 22 to rotate clockwise around the rotation center O by a preset angle. In this way, the external light L2 cannot reach the display device 10 after passing through the second reflector 22 and the first reflector 21, thereby preventing the external light L2 from focusing on the display device 10 and protecting the display device 10.

[0060] Among them, after translating the housing 50 (display device 10 and reflective device 20), as Figure 2 and Figure 3 As shown, the position of light ray L1 reaching the windshield 200 changes from position A to position B. At this time, light ray L1 cannot reach the preset eye box position 300. In order for the human eye to be able to normally observe the image information when in the preset eye box position 300, the rotating device 40 needs to rotate the second reflector 22 to make the position of light ray L1 emitted from the head-up display 100 reaching the windshield 200 return to position A, as shown. Figure 4 As shown, this allows light L1 to be reflected by the windshield 200 and return to the preset eye box position 300. Furthermore, since the second reflector 22 has been rotated by a preset angle, the propagation direction of the backflowing external light L2 can be changed, preventing the backflowing external light L2 from being reflected to the display device 10, thereby protecting the head-up display 100.

[0061] As time goes by, if the head-up display 100 experiences a second backflow of sunlight after the translation of the display device 10 and the reflector 20, and after the rotation of the second reflector 22, the moving device 30 will control the housing 50 to translate in the reverse direction of the vehicle, so that the display device 10 is translated from the second working position to the first working position, and the first reflector 21 is translated from the third working position to the first working position, and the second reflector 22 is translated from the fourth working position to the second working position, so that the display device 10 and the reflector 20 return to the position where the first backflow of sunlight occurred. At the same time, the rotating device 40 will control the second reflector 22 to rotate counterclockwise around the rotation center O by a preset angle, so that the external light L2 cannot be focused on the display device 10, thereby protecting the display device 10. It is also understood that the light L1 emitted by the head-up display 100 will return to position A.

[0062] As can be seen, in this embodiment, the head-up display 100 can be protected from backlighting and normal head-up display can be guaranteed by the above method.

[0063] Thirdly, embodiments of this application provide a protection method for a head-up display (HUD), which is applied to a HUD as described in any of the second aspects. (See reference...) Figure 5 Protection methods include: Step S100: Obtain the internal parameters of the head-up display 100.

[0064] The internal parameters include at least one parameter such as the intensity of external light L2 incident on the head-up display 100 and the surface temperature of the display screen. Specifically, the internal parameters of the head-up display can be obtained through a parameter acquisition device.

[0065] Step S200: If the internal parameters meet the preset conditions, then it is determined that the head-up display 100 is experiencing backsunlight.

[0066] Specifically, the parameter acquisition device may include a sensor and a controller, with the controller electrically connected to the sensor, the moving device 30, and the rotating device 40. The sensor is configured to acquire internal parameters of the head-up display 100, and the controller is configured to determine whether sunlight backflow has occurred in the head-up display 100 based on the internal parameters. The sensor includes a temperature sensor and a light intensity sensor. The temperature sensor may be a thermistor or similar device, and the light intensity sensor may be a photoresistor, a photodiode power meter, an illuminance meter, a solar irradiance meter, or similar device. The controller may be a suitable data processor such as a microcontroller. The temperature sensor may be located on the surface of the display screen in the display device 10, and it acquires the surface temperature of the display screen in the display device 10. The light intensity sensor may be located on the propagation path of the external light ray L2 incident on the interior of the head-up display 100, and it acquires the intensity of the external light ray L2 incident on the interior of the head-up display 100. The controller obtains the light intensity of the external light L2 incident on the interior of the head-up display 100 and the surface of the display screen in the display device 10 through the sensor; and determines that the head-up display 100 is experiencing sunlight backflow when the light intensity of the external light L2 incident on the interior of the head-up display 100 is greater than or equal to a preset intensity, and / or when the temperature of the display device 10 is greater than or equal to a preset temperature.

[0067] Step S300: When the head-up display 100 determines that sunlight is backflowing, it controls the display device 10 and the reflector 20 to translate and the reflector 20 to rotate.

[0068] Specifically, when the controller determines that the head-up display 100 is experiencing backlighting, it sends a translation command to the moving device 30 and a rotation command to the rotating device 40. After receiving the translation command, the moving device 30 will translate the display device 10 and the reflector 20. At the same time, after receiving the rotation command, the rotating device 40 will rotate the reflector 20.

[0069] As can be seen from the foregoing, after the display device 10 is translated and the reflector 20 is translated and rotated, the head-up display 100 can be protected when sunlight shines back, and the user can be guaranteed to observe the virtual image S normally.

[0070] In some embodiments, the protection method further includes: Step S400: Obtaining the operating status of the head-up display 100. Step S500: If the operating status is a power-off state, controlling the display device 10 and the reflector 20 to translate and reset, and controlling the reflector 20 to rotate and reset.

[0071] Specifically, the mobile device 30 and the rotating device 40 can obtain the working status of the head-up display 100 through the host of the vehicle. The working status of the head-up display 100 includes the power-on state and the power-off state. If the current state is power-off, the mobile device 30 controls the display device 10 and the reflector 20 to move and reset, and the rotating device 40 controls the reflector to rotate and reset.

[0072] In this embodiment, by controlling the display device 10 and the reflective device 20 to reset when the power is off, it can be ensured that they are in the same position every time the power is turned on, which helps to maintain the stability and consistency of the display effect and avoid image distortion or display abnormalities caused by positional deviations. At the same time, the rotation and reset of the reflective device 20 ensures the accuracy of its reflection angle, so that the light L1 can propagate along the predetermined path, further ensuring the clarity and accuracy of the display effect.

[0073] It should be noted that the device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them; under the concept of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this application as described above, which are not provided in detail for the sake of brevity; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A heads-up display, characterized in that, Includes display devices, reflection devices, moving devices, and rotating devices; The reflecting device is located on the light-emitting side of the display device, and the rotating device is connected to the reflecting device; The display device is configured to generate light; The reflecting device is configured to reflect the light; The mobile device is configured to control the translation of the display device and the reflective device when sunlight backflows onto the head-up display, and during the translation process, the translation direction of the display device and the translation direction of the reflective device are the same, and the translation distance of the display device is equal to the translation distance of the reflective device; The rotating device is configured to control the rotation of the reflector when sunlight shines back onto the head-up display.

2. The head-up display according to claim 1, characterized in that, The moving device is also configured to control the display device and the reflective device to translate and reset when the head-up display is turned off; The rotating device is configured to control the reflective device to rotate and reset when the head-up display is turned off.

3. The head-up display according to claim 1 or 2, characterized in that, The head-up display also includes a housing; The housing has a receiving space, and the display device and the reflective device are both disposed within the receiving space. The moving device is connected to the housing. The moving device is configured to control the housing to translate when sunlight streams back onto the head-up display, so that the display device and the reflector translate, and during the translation, the translation direction of the display device and the translation direction of the reflector are the same, and the translation distance of the display device is equal to the translation distance of the reflector.

4. The head-up display according to claim 3, characterized in that, The mobile device is also configured to control the housing to translate and reset when the head-up display is turned off, so that the display device and the reflective device translate and reset.

5. The head-up display according to claim 1 or 2, characterized in that, The reflecting device includes a first reflecting mirror and a second reflecting mirror; The first reflector is disposed on the light-emitting side of the display device, and the second reflector is disposed on the propagation path of the light reflected by the first reflector; The rotating device is connected to the second reflector and is configured to control the rotation of the second reflector when sunlight backflows onto the head-up display.

6. The head-up display according to claim 1 or 2, characterized in that, The mobile device is configured to, when sunlight shines back onto the head-up display, control the display device to translate from a first working position to a second working position, and control the reflector to translate from a third working position to a fourth working position; or, control the display device to translate from the second working position to the first working position, and control the reflector to translate from the fourth working position to the third working position.

7. The head-up display according to claim 1 or 2, characterized in that, The head-up display also includes a parameter acquisition device; The parameter acquisition device is electrically connected to the moving device and the rotating device; The parameter acquisition device is configured to acquire the internal parameters of the head-up display, determine whether the head-up display is experiencing backlighting based on the internal parameters, and when it is determined that the head-up display is experiencing backlighting, send a translation command to the moving device and a rotation command to the rotating device. The mobile device is configured to control the translation of the display device and the reflective device based on the translation command; The rotating device is configured to control the rotation of the reflecting device based on the rotation command.

8. A means of transportation, characterized in that, Including windshield glass and head-up display as described in any one of claims 1-7; The windshield is located on the light-emitting side of the head-up display.

9. A method for protecting a head-up display, characterized in that, The protection method, applied to the head-up display as described in any one of claims 1-6, comprises: Obtain the internal parameters of the head-up display; If the internal parameters meet the preset conditions, it is determined that the head-up display is experiencing backlighting. When the head-up display determines that sunlight is shining back, it controls the translation of the display device and the reflector, and controls the rotation of the reflector.

10. The protection method according to claim 9, characterized in that, The protection method further includes: Obtain the working status of the head-up display; If the operating state is the power-off state, then control the display device and the reflector to translate and reset, and control the reflector to rotate and reset.

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