Anti-shake light path, anti-shake method and anti-shake detection method of head-up display

Abstract

The invention provides an anti-shake light path, an anti-shake method and an anti-shake detection method for a head-up display. The anti-shake light path of the head-up display comprises a first image source, an image adjusting assembly and an image receiving device, wherein the first image source emits first image light; the image adjusting assembly turns the first image light to form a first target virtual image; the image receiving device is arranged outside the light envelope range of the first image light and is fixed relative to the first image source; test light is arranged in the head-up display, the image receiving device receives the test light reflected by the image adjusting assembly, and the head-up display obtains the jitter amount of the image adjusting assembly according to the test light received by the image receiving device and determines the picture offset compensation amount according to the jitter amount. The first image source adjusts the first image light according to the frame offset compensation amount. The anti-shake light path of the head-up display can monitor the shake condition of the head-up display and adjust the image source according to the shake condition to carry out image compensation, so that the stability of a display picture of the head-up display is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of head-up display, and in particular to an anti-shake optical path for a head-up display, an anti-shake method for a head-up display, and an anti-shake detection method for a head-up display. Background Art

[0002] Head Up Display (HUD), also known as Head-Up Display, is abbreviated as HUD. Its principle is to project important driving information such as vehicle condition information and real-life intersections onto a projection medium, such as a windshield or a special screen, through a designed optical path to assist driving, avoid potential safety hazards caused by the driver lowering his head to view the display information of the instrument or other driving assistance equipment, and increase driving safety.

[0003] In the related art, when a vehicle is traveling on an uneven road, passing a speed bump, or driving at high speed, the head-up display is prone to shaking, causing the display screen to shake, affecting the driving experience.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] The purpose of the present disclosure is to provide a head-up display anti-shake optical path, a head-up display anti-shake method and a head-up display anti-shake detection method, which can monitor the shake of the head-up display and adjust the image source output image according to the monitored shake to perform image compensation, thereby improving the stability of the head-up display display picture.

[0006] The head-up display anti-shake optical path includes:

[0007] A first image source, used for emitting a first image light;

[0008] An image adjustment component, the image adjustment component is used to deflect the first image light to the projection medium, and the projection medium is used to reflect the first image light to the eye box to form a first target virtual image corresponding to the first image light;

[0009] An image receiving device is arranged outside the light envelope range of the first image light and fixed relative to the first image source, wherein the light envelope range is the light propagation path range between the boundary of the first image light emitted by the first image source and the boundary of the eye box;

[0010] The head-up display has a test light inside, and the image receiving device is used to receive the test light reflected by the image adjustment component to obtain the jitter amount of the image adjustment component. The head-up display is determined based on the jitter amount of the image adjustment component, and the first image source is used to adjust the first image light according to the picture offset compensation amount.

[0011] In an exemplary embodiment of the present disclosure, a head-up display includes a dustproof plate, which is snap-fitted to the housing of the head-up display; the dustproof plate includes a light-transmitting opening, and the image adjustment component is used to turn the first image light from the light-transmitting opening through the dustproof plate to the projection medium; the image receiving device is arranged on the inner wall of the dustproof plate and is located outside the light-transmitting opening.

[0012] In an exemplary embodiment of the present disclosure, the image receiving device is located on one side of the light opening in a first direction, and the first direction is a light propagation direction between the projection medium and the eye box.

[0013] In an exemplary embodiment of the present disclosure, the head-up display anti-shake optical path also includes a reference image source, which is used to emit test light. The reference image source is a fixed light source, which is used to emit test light whose position does not change with time.

[0014] In an exemplary embodiment of the present disclosure, the image adjustment component includes a first reflector and a second reflector, and the first image light emitted by the first image source passes through the second reflector and the first reflector in sequence to the projection medium, and the reflective surface of the first reflector is rotatably arranged relative to the image receiving device; the second reflector is used to reflect the first image light and transmit the test light, and the reference image source and the image receiving device are respectively located on both sides of the second reflector on the optical path of the test light.

[0015] In an exemplary embodiment of the present disclosure, the test light has a first wavelength, and the first wavelength is outside the wavelength range of the first image light.

[0016] In an exemplary embodiment of the present disclosure, the head-up display further includes a second image source, the second image source is used to emit a second image light; the image adjustment component is further used to deflect the second image light to a projection medium, and the projection medium is used to reflect the second image light to an eye box to form a second target virtual image corresponding to the second image light;

[0017] The portion of the first image light emitted by the first image source that is outside the light envelope forms the test light; or the portion of the second image light emitted by the second image source that is outside the light envelope forms the test light.

[0018] In an exemplary embodiment of the present disclosure, the second reflector is used to reflect the first image light and transmit the second image light, the second image light emitted by the second image source passes through the second reflector and is incident on the first reflector, and the reflection angle of the test light on the reflection surface of the first reflector is within the reflection angle of the second image light on the reflection surface of the first reflector.

[0019] In an exemplary embodiment of the present disclosure, the head-up display calculates the screen offset compensation amount according to the shaking amount and the magnification ratio of the image adjustment component to the first image source.

[0020] In an exemplary embodiment of the present disclosure, the head-up display further includes a jitter sensor fixed relative to the image receiving device, the jitter sensor is used to obtain the whole-machine jitter amount of the head-up display, and the head-up display also obtains the picture offset compensation amount according to the whole-machine jitter amount.

[0021] According to another aspect of the present disclosure, a head-up display anti-shake method is provided, comprising:

[0022] Receiving the test light reflected by the head-up display image adjustment component through the image receiving device to obtain the jitter amount of the image adjustment component;

[0023] The whole device jitter of the head-up display is obtained by using a jitter sensor fixed relatively to the image receiving device;

[0024] Calculate the image offset compensation amount according to the jitter amount of the image adjustment component, the whole jitter amount of the head-up display, and the magnification of the head-up display;

[0025] Control the image source to adjust the image light according to the image offset compensation amount.

[0026] In an exemplary embodiment of the present disclosure, the picture offset compensation amount is calculated according to the jitter amount of the image adjustment component, the whole machine jitter amount of the head-up display, and the magnification of the head-up display, including:

[0027] Calculate the first compensation amount C1 according to the jitter amount of the image adjustment component, C1=P2*f1 / f2, P2 is the offset corresponding to the test image obtained by the image receiving device twice, f1 is the focal length of the image light emitted by the image source passing through the image adjustment component, and f2 is the focal length of the lens of the image receiving device;

[0028] The second compensation amount C2 is calculated according to the whole-machine jitter amount of the head-up display and the magnification of the head-up display, C2=K2*R2 / β, R2 is the rotation angle of the housing of the head-up display, K2=Lf / L1, Lf is the equivalent optical path from the eye box to the image adjustment component, L1 is the optical path from the eye box to the image light corresponding to the target virtual image of the eye box, and β is the angular magnification of the projection optical path of the head-up display;

[0029] The picture offset compensation amount is calculated. The picture offset compensation amount C is the superposition of the first compensation amount C1 and the second compensation amount C2, C=C1+C2.

[0030] According to another aspect of the present disclosure, a head-up display anti-shake detection method is provided, comprising:

[0031] Obtaining a jitter amount of the image adjustment component according to a test light reflected by the image adjustment component and received by an image receiving device, wherein the image receiving device is arranged outside a light envelope range of the image light and is relatively fixed to an image source of the head-up display;

[0032] Evaluate the anti-shake effect of the head-up display through the amount of jitter;

[0033] Among them, the anti-shake effect of the head-up display is evaluated by the jitter amount, including:

[0034] Obtain the offset P2 of the image corresponding to the test light obtained by the two detections;

[0035] Calculate the jitter amount Ri according to the offset amount P2, where Ri = K2*atan(P2 / f2), the optical path coefficient K2 = Lf / L1, Lf is the equivalent optical path from the eye box to the image adjustment component, L1 is the optical path from the eye box to the image light corresponding to the target virtual image of the eye box, and f2 is the focal length of the lens of the image receiving device;

[0036] The evaluation result is output according to the relationship between the shake amount Ri and the second angle threshold. When Ri is lower than the second angle threshold, the anti-shake effect of the head-up display is qualified.

[0037] The anti-shake optical path of the head-up display and the anti-shake method of the head-up display disclosed in the present invention introduce test light into the head-up display, and the test light is reflected by the image adjustment component and absorbed by the image receiving device. Since the image receiving device is relatively fixed to the first image source and has a high support stiffness, the test light can reflect the shaking of the image adjustment component relative to the first image source and the image receiving device, that is, it can reflect the shaking of the image adjustment component relative to the fixing part of the head-up display. The shaking amount of the image adjustment component is obtained according to the test light, the picture offset compensation amount is determined according to the shaking amount, and the first image light is adjusted according to the picture offset compensation amount, and compensation is performed at the first image source at the image transmitting end, which can reduce or even eliminate the influence of the shaking of the image adjustment component on the imaging effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0039] In order to better understand the present disclosure, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, related elements or components may have different arrangements as known in the art. In addition, in the drawings, the same reference numerals represent the same or similar components in each drawing. Among them:

[0040] Figure 1 A schematic diagram of an exemplary embodiment of an anti-shake optical path of a head-up display disclosed in the present invention;

[0041] Figure 2 An image that can be seen in an eye box in an exemplary embodiment of an anti-shake optical path of a head-up display disclosed herein;

[0042] Figure 3 An image received in an image receiving device in an exemplary embodiment of an anti-shake optical path of a head-up display disclosed in the present invention;

[0043] Figure 4 A schematic diagram of an exemplary embodiment of an anti-shake optical path of a head-up display disclosed in the present invention;

[0044] Figure 5 is a schematic diagram of another exemplary embodiment of an anti-shake optical path of a head-up display disclosed in the present invention;

[0045] Figure 6 A schematic diagram of another exemplary embodiment of an anti-shake optical path for a head-up display disclosed herein;

[0046] Figure 7 A schematic diagram of the effect of the jitter of the first reflector relative to the first image source on the optical path in an exemplary embodiment of the anti-shake optical path of the head-up display disclosed in the present invention;

[0047] Figure 8 A schematic diagram of an offset P2 corresponding to a test image obtained by two detections by an image receiving device in an exemplary embodiment of an anti-shake optical path of a head-up display disclosed in the present invention;

[0048] Fig. 9 Schematic diagram of the light envelope area located within the head-up display cavity in the head-up display anti-shake light path of the present invention.

[0049] The following are the descriptions of the reference numerals:

[0050] 1. Eye box; 2. Windshield; 31. First sunshade; 32. Second sunshade; 4. Dust plate; 5. First reflector; 51. Initial position; 52. Jitter position; 6. Second reflector; 71. First image source; 72. Second image source; 9. Reference image source. DETAILED DESCRIPTION

[0051] The following will be combined with the accompanying drawings in the exemplary embodiments of the present disclosure to clearly and completely describe the technical solutions in the exemplary embodiments of the present disclosure. The exemplary embodiments described herein are only for illustrative purposes and are not intended to limit the scope of protection of the present disclosure. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the scope of protection of the present disclosure.

[0052] Unless otherwise specified or explained, the technical terms or scientific terms used in the present disclosure shall have the usual meanings understood by people with ordinary skills in the field to which the present disclosure belongs. The present disclosure uses "first" and "second" etc. only as markings, and does not limit the quantity, importance or order of its objects. The words "include" or "comprise" mean that the elements appearing before the word include the elements listed after the word and their equivalents, but do not exclude other elements. "Connection", "fixed" etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, or a movable connection, or an integral connection, or a detachable connection, and can be directly connected or indirectly connected through an intermediate medium. Unless otherwise specified, the "A part is arranged on the B part" described in the present disclosure can be that the A part is directly connected to the B part, or that the A part is arranged on the C part, and the C part is arranged on the B part. "Communication connection" can be a wired communication connection or a wireless communication connection, and can be direct communication or indirect signal communication through an intermediate medium.

[0053] Further, it should be understood that the directional words such as "up", "down", "inside", and "outside" described in the exemplary embodiments of the present disclosure are only used to indicate relative positional relationships. For convenience, the description is made according to the position and state of the head-up display when it is actually working, or according to the angles shown in the accompanying drawings, which should not be understood as a limitation on the exemplary implementation methods of the present disclosure. For example, the "inside" of the windshield refers to the side of the windshield located inside the cab, and the "outside" refers to the side of the windshield located outside the cab. For another example, the "inside" of the dust shield of the head-up display refers to the side of the dust shield located inside the chamber formed by the housing of the head-up display and the dust shield, and the "outside" refers to the side of the dust shield in contact with the external environment of the head-up display.

[0054] Those skilled in the art will appreciate that when the absolute position of the object being described changes, the relative position relationship may also change accordingly. For example, after rotating the structure in the exemplary embodiment of the present disclosure or changing the direction and viewing angle of observation, "up" may also become "down" or "left" or "right", and such changes will not cause obstacles to the understanding of those skilled in the art.

[0055] For the sake of convenience in explaining the scheme of the present disclosure, a possible application scenario provided by the present disclosure takes the application of a head-up display to a car as an example. It should be understood by those skilled in the art that the head-up display of the exemplary embodiment of the present disclosure can also be applied to, for example, sanitation vehicles, fire trucks, military vehicles, and of course, can also be applied to fields such as ships and aviation. For example, it can be applied to aircraft such as fighter jets, so that the driver can track and aim at objects with the assistance of the head-up display. The implementation method and technical effects of the head-up display of the exemplary embodiment of the present disclosure are not limited by the scenario in which the head-up display is actually applied.

[0056] The head-up display projects relevant driving information in front of the driver's field of vision in the form of an image display. The head-up display is usually installed below the instrument panel of the vehicle's center console through a bracket. Therefore, when the vehicle is driving on an uneven road, passing over a speed bump or driving at high speed, the vehicle and the head-up display may shake, causing the display screen to shake.

[0057] The present disclosure provides an anti-shake optical path for a head-up display. In order to facilitate the description of the solution of the present disclosure, a head-up display is first provided, and the working principle of the head-up display is exemplarily described.

[0058] The head-up display may include an image source and an image adjustment component, wherein the image source is used to emit image light, and the image adjustment component is used to turn the image light emitted by the image source to the projection medium in front of the driver, and the projection medium reflects the image light to the eye box 1 to form a target virtual image corresponding to the image light.

[0059] For example, the head-up display may include a first image source 71 for emitting a first image light, an image adjustment component for turning the image light emitted by the image source to the windshield 2, and the windshield 2 for reflecting the first image light to the eye box 1 to form a first target virtual image corresponding to the first image light.

[0060] Exemplarily, the image source can be a display imaging device or a virtual image or real image formed by the display imaging device. For example, the display imaging device can include a liquid crystal screen, and the backlight source of the liquid crystal screen can include one or more of laser, light emitting diode, organic light emitting diode, stimulated fluorescent luminescent material, and quantum dot excitation light source; the display imaging device can also include an actively luminous dot matrix screen composed of light emitting point light sources such as LED, MicroLED, OLED, and plasma light emitting point; or, the display imaging device can also include a projection imaging system based on projection technologies such as digital light processing (DLP), liquid crystal on silicon (LCoS), liquid crystal display (LCD), etc., driven by light sources such as LED, MicroLED, OLED, laser, fluorescence, or a combination thereof, reflected or transmitted by display panels such as digital micromirror display (DMD), LcoS, LCD, and then projected on a projection screen through a projection lens; the display imaging device can also include a laser beam scanning (LBS) projection imaging system that scans a laser beam on a screen to form an image. For all the display imaging devices described above, the real image or virtual image formed by one or more refractions or reflections can also be used as an image source.

[0061] Exemplarily, the image adjustment component includes a reflector, and may also include optical elements such as lenses or waveguides. Exemplarily, the image adjustment component is also used to adjust the image light, such as magnifying the image, correcting aberrations, etc. It should be noted that in the exemplary embodiments of the present disclosure, the image adjustment component may include multiple optical elements, and different optical paths may pass through different optical elements in the image adjustment component. Therefore, the focal length, object side principal surface, image side principal surface, etc. of the image adjustment component corresponding to different optical paths may also be different. A certain physical quantity of "the first image light / the second image light corresponds" refers to the value of the physical quantity in the optical path corresponding to the first image light / the second image light. For example, the focal length of the image adjustment component corresponding to the first image light is f1, which means that the focal length of the optical path of the first image light passing through the image adjustment component is f1; the focal length of the image adjustment component corresponding to the second image light is f2, which means that the focal length of the optical path of the second image light passing through the image adjustment component is f2.

[0062] The eye box 1 is the area where the eyes of the driver or observer are located. In the design of the head-up display device, the range of the eye box 1 can be determined according to the height, posture, etc. of the driver. The eye box 1 specifies an effective area of ​​an eye point. When the observer's eye point is located within this effective area, the observer can see the target virtual image that meets the requirements. In the projection light path of the head-up display, the image light is emitted from the image source and enters the eye box 1, wherein the light propagation path range between the boundary of the image light emitted by the image source and the boundary of the eye box 1 is the light envelope range of the image light. If the image light within the light envelope range is affected, it is fed back into the eye box 1, so that it can be observed by the driver. For example, if the image light within the light envelope range is blocked, the image in the eye box 1 is incomplete.

[0063] The anti-shake optical path of the head-up display disclosed in the present invention is further described below through exemplary embodiments in combination with the accompanying drawings:

[0064] The present disclosure provides an anti-shake optical path for a head-up display, including a first image source 71, an image adjustment component, and an image receiving device 8. The first image source 71 is used to emit a first image light; the image adjustment component is used to turn the first image light to a projection medium, and the projection medium is used to reflect the first image light to an eye box 1 to form a first target virtual image corresponding to the first image light; the image receiving device 8 is arranged outside the light envelope range of the first image light and is relatively fixed to the first image source 71. The head-up display has a test light, and the image receiving device 8 is used to receive the test light reflected by the image adjustment component, obtain the jitter amount of the image adjustment component, and the head-up display determines the screen offset compensation amount according to the jitter amount of the image receiving device 8. The first image source 71 is used to adjust the first image light according to the jitter amount to determine the screen offset compensation amount.

[0065] The first image source 71, the projection medium, the image adjustment component and the eye box 1 can refer to the above exemplary description. In the subsequent embodiments of the present disclosure, the projection medium is taken as the windshield 2 for example. The light envelope range of the first image light is the light propagation path range between the boundary of the first image light emitted by the first image source 71 and the boundary of the eye box 1. The image receiving device 8 can be an image sensor that can receive the test light. For example, Fig. 9 It shows that the light envelope range of the first image light is located in the cavity of the head-up display, below the dustproof plate 4.

[0066] The image adjustment component may include optical components such as lenses and reflectors to form the projection optical path of the head-up display. The image adjustment component may need to change the working angle, position, etc. during the operation of the head-up display to adjust the imaging optical path of the head-up display. Therefore, the image adjustment component may be arranged in the housing of the head-up display in a movable manner relative to the housing of the head-up display. During the operation of the vehicle, the image adjustment component shakes with the entire vehicle and the housing of the head-up display on the one hand, and also shakes relative to the housing of the head-up display on the other hand. For example, the image adjustment component may include a first reflector 5, and the first reflector 5 may be rotatably connected to the housing of the head-up display through its own rotating shaft, so that the inclination angle of the reflection surface of the first reflector 5 can be adjusted relative to the housing of the head-up display. Compared with the parts fixedly connected to the housing of the head-up display, the optical parts arranged in the housing of the head-up display in a relatively movable manner have poorer support stiffness and are more likely to shake relative to the housing of the head-up display.

[0067] The present disclosure introduces test light into the head-up display, and the test light is reflected by the image adjustment component and absorbed by the image receiving device 8. Since the image receiving device 8 is relatively fixed to the first image source 71, for example, the image receiving device 8 and the first image source 71 can be fixedly connected in the housing of the head-up display, and have a high support stiffness, the test light can reflect the jitter of the image adjustment component relative to the first image source 71 and the image receiving device 8, that is, it can reflect the jitter of the image adjustment component relative to the fixing part of the head-up display. The image receiving device 8 does not contact the image adjustment component, so the performance of the image adjustment component will not be changed. The jitter amount of the image adjustment component is obtained according to the test light, the picture offset compensation amount is determined according to the jitter amount, and the first image light is adjusted according to the picture offset compensation amount, and compensation is performed at the first image source 71 at the image transmitting end, which can reduce or even eliminate the influence of the jitter of the image adjustment component on the imaging effect.

[0068] In an exemplary embodiment of the present disclosure, reference Figure 1As shown, the head-up display may include a dustproof plate 4. The dustproof plate 4 is buckled on the housing of the head-up display. The dustproof plate 4 includes a light-transmitting light opening, and the image adjustment component is used to turn the first image light from the light opening through the dustproof plate 4 to the windshield 2. The dustproof plate 4 may include a transparent substrate, which may be made of optical plastic such as polymethyl methacrylate (PMMA), polystyrene (PS) or polyethylene (PE), etc., has good light transmittance, and can be used to isolate water vapor and impurities. The image receiving device 8 can be arranged on the inner wall of the dustproof plate 4 and outside the light opening. Exemplarily, a first sun shading plate 31 and a second sun shading plate 32 are provided outside the dust shield 4. In the direction of vehicle travel, i.e., the direction of light propagation between the windshield 2 and the eye box 1, the first sun shading plate 31 and the second sun shading plate 32 define a light passage. The first sun shading plate 31 can block part of the sunlight from the direction of the windshield 2 from entering the head-up display, and the second sun shading plate 32 can suppress the stray light emitted from the light passage and located at the edge of the light passage from entering the eye box 1.

[0069] The image receiving device 8 is arranged on the inner wall of the dustproof plate 4 and outside the light opening. On the one hand, it will not enter the light envelope range of the first image light, and thus will not affect the image in the eye box 1. On the other hand, the dustproof plate 4 can be fixedly connected to the housing of the head-up display by gluing or bolting around the dustproof plate 4, and has a high support stiffness, which is conducive to improving the anti-shake ability of the image receiving device 8, and improving the accuracy of the shake amount of the image adjustment component detected by the image receiving device 8, so that the first image source 71 can compensate for the shake of the image adjustment component more accurately. For example, refer to Figure 1 As shown, the image receiving device 8 is located on one side of the light opening in a first direction, and the first direction is the light propagation direction between the windshield 2 and the eye box 1, that is, the traveling direction of the vehicle.

[0070] In an exemplary embodiment of the present disclosure, reference Figure 1As shown, the image adjustment component may include a second reflector 6, and the first image light emitted by the first image source 71 passes through the second reflector 6 and the first reflector 5 to the windshield 2 in sequence. Exemplarily, the second reflector 6 is a plane reflector, which can bend the light in the horizontal field of view direction and the vertical field of view direction, and the reflective surface of the first reflector 5 can be a free-form surface, which can not only bend the direction of the light, but also play a role in correcting the image. For another example, the second reflector 6 and the first reflector 5 can both be curved mirrors. The first reflector 5 can be rotatably connected to the housing of the head-up display through its own rotating shaft to adapt to multiple positions of the eye box 1, so as to match the different heights and postures of the observer. The second reflector 6 can be relatively fixed to the housing of the head-up display to reduce the jitter of the image during the movement of the vehicle. For example, the second reflector 6 can be glued to the outside of the housing of the head-up display through the non-optical surface of the outer periphery of the second reflector 6, and the reflective surface of the second reflector 6 is exposed in the inner cavity of the housing of the head-up display, opposite to the first reflector 5 and the first image source 71.

[0071] In an exemplary embodiment of the present disclosure, reference Figure 1 As shown, the portion of the first image light emitted by the first image source 71 outside the light envelope forms the test light. Specifically, Figure 1 A possible optical path of the test light is shown by a dotted line.

[0072] For example, the first image light emitted from the first image source 71 passes through the second reflector 6 and the first reflector 5 in sequence. By designing the matching relationship between the eye box 1 and the projection optical path, the first image light reflected in the central area of ​​the reflection surface of the second reflector 6 and the first reflector 5 can be emitted through the light port and within the light envelope; the first image light reflected in the edge area of ​​the reflection surface of the second reflector 6 or the first reflector 5 is outside the light envelope. Since the edge area of ​​the reflection surface is often larger than the light envelope, it is used for test light without affecting the imaging of the first image light.

[0073] For example, the image receiving device 8 is as follows: Figure 1 As shown, when it is arranged on a side close to the eye box 1 in the first direction of the light-through port, Figure 2 An image that can be seen in the eye box 1 is shown. Since the image receiving device 8 is outside the light envelope, the user can see the entire picture displayed by the head-up display. Figure 3 The image received by the image receiving device 8 is shown, and the test light fails to contain the complete image information in the first image light; therefore, the picture taken by the image receiving device 8 is incomplete. In this exemplary embodiment, the head-up display can calculate the jitter amount of the image adjustment component based on the incomplete picture received by the image receiving device 8.

[0074] In an exemplary embodiment of the present disclosure, the head-up display anti-shake optical path further includes a reference image source 9, a reference Figure 4 As shown, the reference image source 9 is used to emit test light. The reference image source 9 can be a fixed light source, such as a point light source or an image source in a cross shape, and can emit test light whose position does not change with time. In this exemplary embodiment, the head-up display can calculate the jitter amount of the image adjustment component based on the image of the reference image source 9 received by the image receiving device 8.

[0075] For example, the reference image source 9 can be fixed relative to the first image source 71, for example, it can be fixedly connected to the housing of the head-up display. The reference image source 9 can be arranged on the inner wall of the dustproof plate 4 and outside the light passage, for example, the reference image source 9 is located on the side of the eye box 1 in the first direction of the light passage. The image receiving device 8 can be arranged near the first image source 71, and the first image light emitted from the first image source 71 is reflected in the central area of ​​the reflection surface of the second reflector 6 and the first reflector 5, and the test light emitted by the reference image source 9 can be reflected in the edge area of ​​the reflection surface of the second reflector 6 and the first reflector 5, so as to enter the image receiving device 8 located outside the light envelope.

[0076] For example, refer to Figure 4 As shown, the reference image source 9 can be arranged on the inner wall of the dustproof plate 4 and outside the light passage, for example, on the side of the light passage close to the windshield 2 in the first direction. The image receiving device 8 can be arranged near the first image source 71. The reference image source 9 can be arranged on the side of the dustproof plate 4 close to the windshield 2, so that the reference image source 9 is closer to the edge area of ​​the first reflector 5, which is conducive to the arrangement of the reference image source 9 and can prevent the test light emitted by the reference image source 9 from interfering with the first image light used for imaging.

[0077] In the description of the exemplary embodiment of the present disclosure, “the reference image source 9 may be disposed on the inner wall of the dustproof plate 4”, which means that the reference image source 9 may be directly disposed on the inner wall of the dustproof plate 4 in contact with the inner wall of the dustproof plate 4, or that the reference image source 9 may be indirectly disposed on the inner wall of the dustproof plate 4 via an intermediate structure connected to the inner wall of the dustproof plate 4, or that the reference image source 9 may be disposed on a structural member near the inner wall of the dustproof plate 4.

[0078] In an exemplary embodiment of the present disclosure, the second reflector 6 is used to reflect the first image light and transmit the test light, and the reference image source 9 and the image receiving device 8 are respectively located on both sides of the second reflector 6 on the optical path of the test light. Figure 5 As shown, a reference image source 9 can be arranged on the rear side of the second reflector 6, and the first image light emitted by the first image source 71 is reflected to the first reflector 5 via the second reflector 6, and the test light emitted by the reference image source 9 is incident on the first reflector 5 through the second reflector 6, and is reflected by the first reflector 5 to enter the image receiving device 8.

[0079] In an exemplary embodiment, the test light has a first wavelength, and the first wavelength is outside the wavelength range of the first image light. For example, the first image light is in the visible light band, and the test light can be infrared light. In some application scenarios, due to the reversibility of the optical path, external sunlight is focused on the image source, such as an LCD screen, through the image adjustment component, which may cause the image source to malfunction or be damaged at high temperatures. The second reflector 6 is used to transmit the test light of the first wavelength. When the external sunlight that flows back into the head-up display passes through the second reflector 6, the second reflector 6 can partially transmit the first wavelength in the sunlight, thereby reducing the light energy reflected by the second reflector 6 to the first image source 71, and protecting the image source. Exemplarily, the second reflector 6 is used to reflect visible light and transmit near-infrared light.

[0080] In an exemplary embodiment of the present disclosure, the head-up display further includes a second image source 72, which is used to emit a second image light. The image adjustment component is also used to turn the second image light to the projection medium, and the projection medium is used to reflect the second image light to the eye box 1 to form a second target virtual image corresponding to the second image light. The first image light and the second image light can have different imaging distances and display contents, thereby realizing dual-focal plane display.

[0081] refer to Figure 6 As shown, the second image source 72 can be arranged on the opposite sides of the second reflector 6 with the first image source 71 respectively. The second reflector 6 is used to reflect the first image light and transmit the second image light. The second image light emitted by the second image source 72 passes through the second reflector 6 and enters the first reflector 5, and then is turned by the first reflector 5 to the windshield 2.

[0082] In an exemplary embodiment of the present disclosure, the second image source 72 can also adjust the second image light according to the image offset compensation amount. Compensation is performed at the second image source 72 at the image transmitting end to reduce or even eliminate the effect of the jitter of the image adjustment component on the imaging effect of the second image source 72.

[0083] For example, the first image source 71 and the second image source 72 can both be connected to the image receiving device 8 for communication. The image receiving device 8 can obtain the jitter amount of the image adjustment component based on the test light and send it to the first image source 71 and the second image source 72. The first image source 71 can obtain the picture offset compensation amount corresponding to the first image light based on the jitter amount of the image adjustment component and adjust the first image light; the second image source 72 can obtain the picture offset compensation amount corresponding to the second image light based on the jitter amount of the image adjustment component and adjust the second image light. The picture offset compensation amount corresponding to the first image light may be different from the picture offset compensation amount corresponding to the second image light.

[0084] In an exemplary embodiment, the part of the second image light emitted by the second image source 72 that is outside the light envelope forms the test light. Specifically, the matching relationship between the eye box 1 and the projection light path can be designed so that the second image light reflected in the central area of ​​the reflection surface of the first reflector 5 can be emitted through the light port and is within the light envelope; the second image light reflected in the edge area of ​​the reflection surface of the first reflector 5 is outside the light envelope.

[0085] In another exemplary embodiment, the reference image source 9 may be arranged on the rear side of the second reflector 6, that is, the reference image source 9 and the second image source 72 are arranged on the same side of the second reflector 6. Figure 6 As shown, the reflection angle of the test light on the reflection surface of the first reflector 5 is within the reflection angle of the second image light on the reflection surface of the first reflector 5. Specifically, the reference image source 9 can be arranged on the side of the second image source 72 close to the dustproof plate 4 in the vertical direction perpendicular to the first direction (i.e., the direction perpendicular to the road surface), and the image receiving device 8 can be arranged on the inner wall of the dustproof plate 4 and located on the side close to the eye box 1 in the first direction of the light opening. The test light emitted by the reference image source 9 is reflected at the edge area of ​​the reflection surface of the first reflector 5 away from the dustproof plate 4, thereby entering the image receiving device 8 located outside the light envelope range. The reference image source 9 is located close to the image receiving device 8, which is conducive to utilizing the space under the second shading plate 32, making the structural arrangement more compact and convenient for connecting the circuit harness.

[0086] In an exemplary embodiment of the present disclosure, the inclination angle of the reflection surface of the second reflector 6 is adjustable relative to the housing of the head-up display. Figure 4 As shown, the reference image source 9 can be arranged on the inner wall of the dustproof plate 4 and located on the side of the light opening close to the windshield 2 in the first direction, and the image receiving device 8 is arranged near the first image source 71.

[0087] The head-up display adjusts the first image light according to the image offset compensation amount. For example, the head-up display can obtain the image offset compensation amount according to the jitter amount and the magnification ratio of the image adjustment component to the first image source 71, and the first image source 71 is used to adjust the first image light according to the image offset compensation amount.

[0088] The jitter amount can be represented by the position and angle change of the jitter element in the optical path. For example, the jitter amount can be represented by the angle change of the jitter element. Taking the example that the inclination angle of the reflection surface of the first reflector 5 is adjustable relative to the housing of the head-up display, how the jitter of the first reflector 5 relative to the first image source 71 affects the image is described. Figure 7As shown, the solid line shows the initial position 51 of the first reflector 5, and the dotted line shows the jitter position 52 of the first reflector 5 after the jitter causes the rotation, and the angle between the two is the rotation angle R0, that is, the jitter amount of the first reflector 5. The angle offset of the test light reflected by the first reflector 5 is R1, R1=K1*R0, and the head-up display is used to calculate the screen offset compensation amount according to the angle offset R1 of the test light reflected by the first reflector 5. Among them, K1 is the magnification coefficient of the optical path from the first reflector 5 to the image receiving device 8, that is, the rate of change of the angle change on the first reflector 5 reflected to the end of the optical path.

[0089] Exemplarily, the first reflector 5 is a plane mirror, and the first reflector 5 is an optical element whose last focal length of the optical path projecting light to the image receiving device 8 is not zero. K1 is the magnification coefficient of the optical path from the first reflector 5 to the image receiving device 8, K1=K0=2.

[0090] Exemplarily, the first reflector 5 is a curved mirror. For example, the first reflector 5 is a concave spherical or cylindrical reflector. When R0 is lower than the preset first angle threshold, that is, when the jitter of the first reflector 5 is very small, the change in the reflection position of the first image light and the test light on the reflection surface of the first reflector 5 and the change in the focal length have little effect on the magnification factor and can be ignored, and K1=K0=2 is taken. When R0 reaches the preset first angle threshold, that is, when the jitter of the first reflector 5 is large, the magnification factor can be corrected according to the result obtained in advance, and K1="K0," is taken as the correction coefficient of the magnification factor K1 for the change in the reflection position and the change in curvature when the pre-calibrated reflection surface changes from the initial position 51 to the jitter position 52.

[0091] The same is true for other jitter elements. For example, the image adjustment component may include a transmission element, such as a lens. For the jitter of the transmission element relative to the first image source 71, the image receiving device 8 is used to receive the test light transmitted by the transmission element. The angle between the initial position of the transmission element and the position after the rotation caused by the jitter is R0, that is, the jitter amount of the transmission element. The angular offset of the test light transmitted by the transmission element is R1. The head-up display is used to calculate the screen offset compensation amount according to the angular offset R1 of the test light transmitted by the transmission element. The magnification coefficient K1 of the optical path from the transmission element to the image receiving device 8 can be determined by the results obtained in advance.

[0092] refer to Figure 8The image receiving device 8 shows the imaging of the test light received by the image receiving device 8 twice. The first image light emitted by the first image source 71 is reflected / refracted by the components in the image adjustment component, and the corresponding focal length is f1; the focal length of the lens in the image receiving device 8 is f2, and the offset corresponding to the test image obtained by the image receiving device 8 twice through image processing is P2, then:

[0093] C1=f1*tan(R1), P2=f2*tan(KR0)=f2*tan(R1). Wherein, C1 is the adjustment compensation amount of the first image source 71 end to the first image light, R1 is the angle offset of the aforementioned test light, and R0 is the angle between the initial position 51 of the aforementioned shaking element and the shaking position 52 after the element is rotated due to shaking, that is, the rotation angle.

[0094] Then, R0=atan(P2 / f2) / K. According to the jitter amount, the adjustment compensation amount C1 of the first image source 71 for the first image light is C1=P2*f1 / f2.

[0095] In an exemplary embodiment of the present disclosure, the image receiving device 8 can be communicatively connected to an auxiliary display device, and the auxiliary display device is used to continuously play the test image received by the image receiving device 8 in real time, so that the image jitter effect corresponding to the jitter amount of the image adjustment component and the picture compensation effect of the image source can be intuitively felt.

[0096] In an exemplary embodiment of the present disclosure, the head-up display also includes a jitter sensor fixed relative to the image receiving device 8, and the jitter sensor is used to obtain the overall jitter amount of the head-up display. The head-up display also obtains the picture offset compensation amount based on the overall jitter amount of the head-up display.

[0097] During the driving process of the vehicle, the head-up display and the vehicle go up and down, tilt, etc., which will also cause the head-up display device to shake R2 along with the whole vehicle. That is, the jitter of the head-up display image can be the superposition of the jitter amount of the jitter element in the image adjustment component relative to the housing of the head-up display, the image source and other fixed components (the jitter amount of the image adjustment component), and the jitter amount of the head-up display device as a whole relative to the whole vehicle (the whole machine jitter amount of the head-up display). In the exemplary embodiment of the present disclosure, the jitter sensor is relatively fixed to the image receiving device 8, and the jitter of the head-up display device as a whole along with the whole vehicle can be obtained. The jitter sensor can be a rotation sensor, an acceleration sensor, etc.

[0098] Specifically, the head-up display obtains the image offset compensation amount according to the overall jitter of the head-up display. The optical path L1 from the eye box 1 to the virtual image is not equal to the equivalent optical path Lf between the eye box 1 and the image adjustment component. Compensation is performed through the image source, and the compensation amount is C2. Among them, the optical path coefficient K2 is used to compensate for the difference between the optical paths L1 and Lf, K2≈Lf / L1, and K2=Lf / L1 can be used for calculation. β is the angular magnification of the head-up display projection light path, which can be obtained by the image size on the light-emitting surface of the image source (such as the display screen surface) and the image angle seen by the human eye. The unit is mm / °, and C2=K2*R2 / β.

[0099] Exemplarily, the head-up display can obtain the screen offset compensation amount based on the jitter amount of the image adjustment component and the jitter amount of the head-up display as a whole. Among them, the jitter amount of the image adjustment component can reflect the jitter information carried by the jitter element in the image adjustment component when the test light passes through the image adjustment component, and the jitter amount of the head-up display as a whole can reflect the jitter information of the head-up display device as a whole. For example, the jitter of the jitter element in the image adjustment component relative to the image source of the head-up display can be compensated separately, and the compensation amount is C=C1; for another example, the jitter of the head-up display device as a whole relative to the whole vehicle can be compensated separately, and the screen offset compensation amount is C=C2. For another example, the superposition of the two jitters can be compensated, that is, the screen offset compensation amount is C=C1+C2.

[0100] In an exemplary embodiment of the present disclosure, the jitter amount of the image adjustment component can also be obtained through the test light received by the image receiving device 8 to evaluate the anti-jitter effect of the head-up display. Specifically, according to the test light reflected by the image adjustment component received by the image receiving device 8, the offset P2 of the image corresponding to the test light obtained by two detections is obtained, and the jitter amount Ri is calculated. Ri = K2*atan (P2 / f2), wherein the optical path coefficient K2 is used to compensate for the difference between the optical paths L1 and Lf, the calculation of K2 has been described in the aforementioned exemplary embodiment, and f2 is the focal length of the lens in the image receiving device 8. When the jitter amount Ri is lower than the preset second angle threshold, the anti-jitter effect of the internal components of the head-up display is evaluated to be qualified, and the anti-jitter effect of the head-up display can be outputted as qualified; when Ri reaches the preset second angle threshold, the anti-jitter effect of the internal components of the head-up display is outputted as unqualified, and a warning message can be issued, or further anti-jitter measures can be initiated.

[0101] According to another aspect of the present disclosure, a head-up display anti-shake method is also provided, comprising:

[0102] Step S100: receiving the test light reflected by the head-up display image adjustment component through the image receiving device 8 to obtain the jitter amount of the image adjustment component;

[0103] Step S200: obtaining the whole device jitter amount of the head-up display through a jitter sensor fixed relatively to the image receiving device 8;

[0104] Step S300: calculating the image offset compensation amount according to the jitter amount of the image adjustment component, the whole jitter amount of the head-up display, and the magnification of the head-up display;

[0105] Step S400: controlling the image source to adjust the image light according to the image offset compensation amount.

[0106] Among them, step S100 obtains the jitter amount of the image adjustment component through the image receiving device 8 and step S200 obtains the jitter amount of the image adjustment component through the jitter sensor. Please refer to the description of the anti-shake optical path of the head-up display in the aforementioned exemplary embodiment, which will not be repeated here.

[0107] Step S300 may further include:

[0108] Step S310: Calculate a first compensation amount C1 according to the jitter amount of the image adjustment component, C1=P2*f1 / f2, P2 is the offset corresponding to the test image obtained by the image receiving device 8 twice, f1 is the focal length of the image light emitted by the image source passing through the image adjustment component, and f2 is the focal length of the lens of the image receiving device 8;

[0109] Step S320: Calculate the second compensation amount C2 according to the whole-machine jitter amount of the head-up display and the magnification of the head-up display, C2=K2*R2 / β, R2 is the rotation angle of the housing of the head-up display, K2=Lf / L1, Lf is the equivalent optical path from the eye box 1 to the image adjustment component, L1 is the optical path from the eye box 1 to the target virtual image of the image light corresponding to the eye box 1, and β is the angular magnification of the projection optical path of the head-up display;

[0110] Step S330: Calculate the picture offset compensation amount, where the picture offset compensation amount C is the superposition of the first compensation amount C1 and the second compensation amount C2, C=C1+C2.

[0111] Exemplarily, the image source may include a first image source 71 for emitting a first image light to form a first target virtual image corresponding to the first image light in the eye box 1, and the image source may also include a second image source 72 for emitting a second image light to form a second target virtual image corresponding to the second image light in the eye box 1.

[0112] The anti-jitter method for the head-up display disclosed in the present invention can introduce test light to be reflected through the image adjustment component to obtain the jitter of the image adjustment component relative to the fixing parts of the head-up display, and can obtain the jitter of the head-up display device as a whole relative to the whole vehicle through a jitter sensor, and then compensate for the image source picture, which can reduce or even eliminate the influence of the head-up display jitter on the imaging effect and improve the stability of the projection picture.

[0113] According to another aspect of the present disclosure, a head-up display anti-shake detection method is also provided, including:

[0114] Step S1000: obtaining the jitter amount of the image adjustment component according to the test light reflected by the image adjustment component and received by the image receiving device 8, wherein the image receiving device 8 is arranged outside the light envelope range of the image light and is relatively fixed to the image source of the head-up display;

[0115] Step S2000: Evaluate the anti-shake effect of the head-up display according to the shake amount.

[0116] Wherein, step S2000 evaluates the anti-jitter effect of the head-up display according to the jitter amount, which may include:

[0117] Step S2100: obtaining the offset P2 of the image corresponding to the test light obtained by two detections;

[0118] Step S2200: Calculate the jitter amount Ri according to the offset amount P2, where Ri=K2*atan(P2 / f2), the optical path coefficient K2=Lf / L1, Lf is the equivalent optical path from the eye box to the image adjustment component, L1 is the optical path from the eye box to the image light corresponding to the target virtual image of the eye box, and f2 is the focal length of the lens of the image receiving device 8;

[0119] Step S2300: Output an evaluation result according to the relationship between the shake amount Ri and the second angle threshold. When Ri is lower than the second angle threshold, the anti-shake effect of the head-up display is qualified.

[0120] Among them, step S1000 obtains the jitter amount of the image adjustment component according to the image receiving device 8, and step S2100 obtains the offset P2 of the image corresponding to the test light obtained by the two detections. The description of the anti-shake optical path of the head-up display in the aforementioned exemplary embodiment can be referred to, and will not be repeated here.

[0121] The head-up display anti-jitter detection method provided in the present disclosure can introduce test light to be reflected by the image adjustment component to obtain the jitter condition of the image adjustment component relative to the fixing part of the head-up display, and evaluate the anti-jitter effect of the image adjustment component by comparing the jitter amount Ri with the preset second angle threshold.

[0122] In an exemplary embodiment of the present disclosure, the anti-shake effect of the image adjustment component is tested by the anti-shake detection method of the head-up display provided by the present disclosure, and the image receiving device 8 can be connected to the auxiliary display device in communication, and the auxiliary display device plays the test image received by the image receiving device 8 in real time and continuously, and the anti-shake effect evaluation result of the image adjustment component can also be output through the auxiliary display device. When Ri reaches the preset second angle threshold, an early warning message can be issued through the auxiliary display device. After considering the specification and practicing the invention disclosed herein, those skilled in the art will easily think of other embodiments of the present disclosure. The present disclosure is intended to cover any variants, uses or adaptive changes of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary technical means in the technical field that are not disclosed in the present disclosure. The description and embodiments are regarded as exemplary only, and the true scope and spirit of the present disclosure are indicated by the attached claims.

[0123] It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from its scope. The scope of protection of the present disclosure is limited only by the appended claims.

Claims

1. A head-up display anti-shake optical path, characterized in that: include: A first image source (71) for emitting a first image light; An image adjustment component, the image adjustment component is used to deflect the first image light to a projection medium, the projection medium is used to reflect the first image light to an eye box (1) to form a first target virtual image corresponding to the first image light; An image receiving device (8) is arranged outside the light envelope range of the first image light and is fixed relative to the first image source (71), wherein the light envelope range is the light propagation path range between the boundary of the first image light emitted by the first image source (71) and the boundary of the eye box (1); The head-up display has a test light inside, the image receiving device (8) is used to receive the test light reflected by the image adjustment component, obtain the jitter amount of the image adjustment component, the head-up display determines the picture offset compensation amount according to the jitter amount of the image adjustment component, and the first image source (71) is used to adjust the first image light according to the picture offset compensation amount.

2. The head-up display anti-shake optical path according to claim 1, characterized in that: The head-up display comprises a dustproof plate (4), the dustproof plate (4) being buckled on the housing of the head-up display; the dustproof plate (4) comprises a light-transmitting light opening, the image adjustment component is used to deflect the first image light from the light opening through the dustproof plate (4) to the projection medium; the image receiving device (8) is arranged on the inner wall of the dustproof plate (4) and is located outside the light opening.

3. The head-up display anti-shake optical path according to claim 2, characterized in that: The image receiving device (8) is located on one side of the light opening in a first direction, wherein the first direction is the light propagation direction between the projection medium and the eye box (1).

4. The head-up display anti-shake optical path according to claim 1, characterized in that: The head-up display anti-shake optical path also includes a reference image source (9), which is used to emit the test light. The reference image source (9) is a fixed light source, which emits the test light whose light position does not change with time.

5. The head-up display anti-shake optical path according to claim 4, characterized in that: The image adjustment component comprises a first reflector (5) and a second reflector (6); the first image light emitted by the first image source (71) passes through the second reflector (6) and the first reflector (5) in sequence to the projection medium; the reflection surface of the first reflector (5) is rotatably arranged relative to the image receiving device (8); the second reflector (6) is used to reflect the first image light and transmit the test light; the reference image source (9) and the image receiving device (8) are respectively located on both sides of the second reflector (6) on the optical path of the test light.

6. The head-up display anti-shake optical path according to claim 5, characterized in that: The test light has a first wavelength, and the first wavelength is outside the wavelength range of the first image light.

7. The head-up display anti-shake optical path according to claim 5, characterized in that: The head-up display further comprises a second image source (72), the second image source (72) being used to emit a second image light; the image adjustment component is further used to deflect the second image light to a projection medium, the projection medium being used to reflect the second image light to an eye box (1) to form a second target virtual image corresponding to the second image light; The portion of the first image light emitted by the first image source (71) that is outside the light envelope forms the test light; or the portion of the second image light emitted by the second image source (72) that is outside the light envelope forms the test light.

8. The head-up display anti-shake optical path according to claim 7, characterized in that: The second reflector (6) is used to reflect the first image light and transmit the second image light; the second image light emitted by the second image source (72) passes through the second reflector (6) and enters the first reflector (5); the reflection angle of the test light on the reflection surface of the first reflector (5) is within the reflection angle of the second image light on the reflection surface of the first reflector (5).

9. The head-up display anti-shake optical path according to claim 1, characterized in that: The head-up display calculates the picture offset compensation amount according to the shaking amount and the magnification ratio of the image adjustment component to the first image source (71).

10. The head-up display anti-shake optical path according to claim 9, characterized in that: The head-up display further comprises a shake sensor fixed relative to the image receiving device (8), the shake sensor being used to obtain the whole-machine shake amount of the head-up display, and the head-up display further obtains the picture offset compensation amount according to the whole-machine shake amount.

11. A head-up display anti-jitter method, characterized in that: include: Receiving the test light reflected by the head-up display image adjustment component through an image receiving device (8) to obtain the jitter amount of the image adjustment component; Obtaining the whole device jitter of the head-up display through a jitter sensor fixed relatively to the image receiving device (8); Calculating a picture offset compensation amount according to a jitter amount of the image adjustment component, a whole-machine jitter amount of the head-up display, and a magnification of the head-up display; The image source is controlled to adjust the image light according to the image offset compensation amount.

12. The head-up display anti-shake method according to claim 11, characterized in that: Calculating a picture offset compensation amount according to a jitter amount of the image adjustment component, a whole-machine jitter amount of the head-up display, and a magnification of the head-up display, including: Calculating a first compensation amount C1 according to the jitter amount of the image adjustment component, C1=P2*f1 / f2, P2 is the offset corresponding to the test image obtained by the image receiving device (8) through two detections, f1 is the focal length of the image light emitted by the image source passing through the image adjustment component, and f2 is the focal length of the lens of the image receiving device (8); The second compensation amount C2 is calculated according to the whole-machine jitter amount of the head-up display and the magnification of the head-up display, where C2=K2*R2 / β, R2 is the rotation angle of the housing of the head-up display, K2=Lf / L1, Lf is the equivalent optical path from the eye box (1) to the image adjustment component, L1 is the optical path from the eye box (1) to the target virtual image of the image light corresponding to the eye box (1), and β is the angular magnification of the projection optical path of the head-up display; The picture offset compensation amount is calculated, and the picture offset compensation amount C is the superposition of the first compensation amount C1 and the second compensation amount C2, C=C1+C2.

13. A head-up display anti-jitter detection method, characterized in that: include: Obtaining the jitter amount of the image adjustment component according to the test light reflected by the image adjustment component and received by the image receiving device (8), wherein the image receiving device (8) is arranged outside the light envelope range of the image light and is fixed relative to the image source of the head-up display; evaluating the anti-jitter effect of the head-up display according to the jitter amount; The anti-jitter effect of the head-up display is evaluated by the jitter amount, including: Obtaining an offset P2 of the image corresponding to the test light obtained by two detections; The jitter amount Ri is calculated according to the offset amount P2, wherein Ri=K2*atan(P2 / f2), the optical path coefficient K2=Lf / L1, Lf is the equivalent optical path from the eye box (1) to the image adjustment component, L1 is the optical path from the eye box (1) to the target virtual image of the image light corresponding to the eye box (1), and f2 is the focal length of the lens of the image receiving device (8); An evaluation result is output according to the relationship between the shake amount Ri and the second angle threshold, and when Ri is lower than the second angle threshold, the anti-shake effect of the head-up display is qualified.

Images