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

Abstract

The present disclosure provides a head-up display anti-shake optical path, an anti-shake method and an anti-shake detection method. The head-up display anti-shake optical path comprises a first image source, an image adjusting assembly and an image receiving device. The first image source emits first image light. The image adjusting assembly bends 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 opposite to the first image source. The head-up display has a test light. The image receiving device receives the test light reflected by the image adjusting assembly. The head-up display obtains the shaking 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 shaking amount. The first image source adjusts the first image light according to the picture offset compensation amount. The head-up display anti-shake optical path of the present disclosure can monitor the shaking condition of the head-up display and adjust the image source according to the shaking condition to compensate the image and improve the stability of the picture displayed by the head-up display.

Description

TECHNICAL FIELD

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

[0002] Head-up display (Head Up Display, HUD for short) is a device that projects important driving information such as vehicle status information and real-time road information on a projection medium such as windshield or a special screen to assist driving and avoid safety hazards caused by drivers looking down at the instrument panel or other driving assistance device displays, thereby increasing driving safety.

[0003] In related technologies, when a vehicle is driving on uneven roads, passing through a speed reduction zone or driving at high speed, the head-up display is prone to shaking, causing the display screen to shake and affecting the driving experience.

[0004] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present disclosure, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[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 shaking of the head-up display and adjust the image source exit image according to the monitored shaking to compensate for the image, thereby improving the stability of the head-up display display screen.

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

[0007] A first image source for emitting first image light;

[0008] An image adjustment assembly for turning the first image light to a projection medium, the projection medium for reflecting the first image light to an eyebox to form a first target virtual image corresponding to the first image light;

[0009] An image receiving device outside the light envelope range of the first image light and fixed opposite to the first image source, the light envelope range being the light propagation path range between the boundary of the first image source emitting the first image light and the boundary of the eyebox;

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

[0011] In an example embodiment of the present disclosure, the head-up display comprises a dustproof plate, the dustproof plate is buckled to the shell of the head-up display; the dustproof plate comprises a light transmission port, the image adjusting assembly is used to turn the first image light to pass through the dustproof plate from the light transmission port to the projection medium; the image receiving device is arranged on the inner wall of the dustproof plate and located outside the light transmission port.

[0012] In an example embodiment of the present disclosure, the image receiving device is located on one side of the first direction of the light transmission port, the first direction is the light propagation direction between the projection medium and the eyebox.

[0013] In an example embodiment of the present disclosure, the head-up display anti-shake light path further comprises a reference image source, the reference image source 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 example embodiment of the present disclosure, the image adjusting assembly comprises a first mirror and a second mirror, the first image light emitted by the first image source passes through the second mirror and the first mirror in sequence to the projection medium, the reflecting surface of the first mirror is rotatably arranged relative to the image receiving device; the second mirror is used to reflect the first image light and transmit the test light, the reference image source and the image receiving device are respectively located on the two sides of the second mirror in the light path of the test light.

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

[0016] In an example embodiment of the present disclosure, the head-up display further comprises a second image source, the second image source is used to emit second image light; the image adjusting assembly is further used to turn the second image light to the projection medium, the projection medium is used to reflect the second image light to the eyebox to form a second target virtual image corresponding to the second image light.

[0017] The part of the first image light emitted by the first image source which is located outside the light envelope range forms the test light; or, the part of the second image light emitted by the second image source which is located outside the light envelope range forms the test light.

[0018] In an example embodiment of the present disclosure, the second mirror 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 mirror and is incident on the first mirror, the reflection angle of the test light on the reflecting surface of the first mirror is within the reflection angle of the second image light on the reflecting surface of the first mirror.

[0019] In an example embodiment of the present disclosure, the head-up display calculates the picture offset compensation amount according to the jitter amount and the magnification of the image adjusting assembly to the first image source.

[0020] In an exemplary embodiment of the present disclosure, the head-up display further comprises a jitter sensor fixed relative to the image receiving device, the jitter sensor being configured to obtain a jitter amount of the head-up display, and the head-up display is further configured to obtain a picture shift compensation amount according to the jitter amount.

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

[0022] receiving, by the image receiving device, the test light reflected by the image adjustment assembly of the head-up display to obtain a jitter amount of the image adjustment assembly;

[0023] obtaining, by the jitter sensor fixed relative to the image receiving device, a jitter amount of the head-up display;

[0024] calculating a picture shift compensation amount according to the jitter amount of the image adjustment assembly, the jitter amount of the head-up display, and a magnification of the head-up display;

[0025] adjusting, by the image source, the image light according to the picture shift compensation amount.

[0026] In an exemplary embodiment of the present disclosure, the picture shift compensation amount is calculated according to the jitter amount of the image adjustment assembly, the jitter amount of the head-up display, and the magnification of the head-up display, comprising:

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

[0028] calculating a second compensation amount C2 according to the jitter amount of the head-up display and the magnification of the head-up display, C2 = K2*R2 / β, R2 is a rotation angle of the housing of the head-up display, K2 = Lf / L1, Lf is an equivalent optical path between the eyebox and the image adjustment assembly, L1 is an optical path from the eyebox to a target virtual image of the image light corresponding to the eyebox, and β is an angular magnification of a projection light path of the head-up display;

[0029] calculating the picture shift compensation amount, the picture shift compensation amount C being a superposition of the first compensation amount C1 and the second compensation amount C2, C = C1 + C2.

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

[0031] The jitter amount of the image adjustment assembly is obtained according to test light reflected by the image adjustment assembly and received by an image receiving device, the image receiving device is arranged outside the light envelope of the image light and is fixed relative to the image source of the head-up display;

[0032] The anti-jitter effect of the head-up display is evaluated through the jitter amount;

[0033] The anti-jitter effect of the head-up display is evaluated through the jitter amount, and the method comprises the following steps:

[0034] An offset amount P2 of the images corresponding to the test light obtained by the two detections is obtained;

[0035] A jitter amount Ri is calculated according to the offset amount P2, wherein Ri = K2*atan(P2 / f2), an optical path coefficient K2 = Lf / L1, Lf is an equivalent optical path between the eyebox and the image adjustment assembly, L1 is an optical path from the eyebox to a target virtual image corresponding to the image light of the eyebox, and f2 is a focal length of a lens of the image receiving device;

[0036] An evaluation result is output according to a relationship between the jitter amount Ri and a second angle threshold value, and when the jitter amount Ri is lower than the second angle threshold value, the anti-jitter effect of the head-up display is qualified.

[0037] The head-up display anti-jitter optical path and the head-up display anti-jitter method of the present disclosure introduce test light into the head-up display, the test light is reflected by the image adjustment assembly and is absorbed by the image receiving device. Since the image receiving device is fixed relative to the first image source and has high support stiffness, the test light can reflect the jitter condition of the image adjustment assembly relative to the first image source and the image receiving device, that is, the jitter condition of the image adjustment assembly relative to the fixing member of the head-up display. The jitter amount of the image adjustment assembly 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, so that compensation can be performed at the first image source of the image emission end, and the influence of the jitter of the image adjustment assembly on the imaging effect can be weakened or even eliminated. BRIEF DESCRIPTION OF DRAWINGS

[0038] The drawings incorporated into the specification and forming a part thereof, illustrate embodiments consistent with the present disclosure and, together with the specification, serve to explain the principles of the present disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.

[0039] For a better understanding of the present disclosure, reference can be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale, and related elements can be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, related elements or components can have different settings as known in the art. Furthermore, in the drawings, the same reference numerals represent the same or similar components throughout the various drawings. Among them:

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

[0041] Figure 2 An image that can be seen in the eyebox in an exemplary embodiment of the optical path of the head-up display anti-shake of the present disclosure;

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

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

[0044] Figure 5 A schematic diagram of another exemplary embodiment of the optical path of the head-up display anti-shake of the present disclosure;

[0045] Figure 6 A schematic diagram of still another exemplary embodiment of the optical path of the head-up display anti-shake of the present disclosure;

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

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

[0048] Figure 9 A schematic diagram of the light envelope region located inside the head-up display cavity in the optical path of the head-up display anti-shake of the present disclosure.

[0049] The reference numerals are explained as follows:

[0050] 1, eyebox; 2, windshield; 31, first light shield; 32, second light shield; 4, dust shield; 5, first mirror; 51, initial position; 52, shake position; 6, second mirror; 71, first image source; 72, second image source; 9, reference image source. DETAILED DESCRIPTION

[0051] The technical solutions in the example embodiments of the present disclosure will be described clearly and completely below in combination with the drawings in the example embodiments of the present disclosure. The example embodiments described herein are merely for illustrative purposes, and are not intended to limit the protection scope of the present disclosure, and thus it should be understood that various modifications and changes can be made to the example embodiments without departing from the protection scope of the present disclosure.

[0052] Unless otherwise defined or specified, the technical terms or scientific terms used in the present disclosure should be understood as the common meanings understood by those skilled in the art to which the present disclosure belongs. The present disclosure uses “first” and “second” and the like only as labels, and is not intended to limit the quantity or importance, order of the objects. The terms “include” or “contain” and the like mean that the elements appearing before the terms encompass the elements listed after the terms and their equivalents, and do not exclude other elements. “Connection”, “fixing” and the like should be understood broadly, for example, “connection” can be fixed connection, or movable connection, or integral connection, or detachable connection, and can be direct connection or indirect connection through an intermediate medium. Unless otherwise specified, the present disclosure describes “A part is provided on B part”, which can be that A part is directly connected to B part, or A part is provided on C part, and C part is provided on B part. “Communication connection” can be wired communication connection, or wireless communication connection, and can be direct communication or indirect signal communication through an intermediate medium.

[0053] Further, it should be understood that the relative terms “upper”, “lower”, “inner”, “outer” and the like described in the example embodiments of the present disclosure merely represent relative positional relationships. For the sake of 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 angle shown in the drawings, and should not be understood as limiting the example embodiments of the present disclosure. For example, the “inner side” of the windshield glass refers to the side of the windshield glass located inside the cab, and the “outer side” refers to the side of the windshield glass located outside the cab. For another example, the “inner side” of the dust shield of the head-up display refers to the side of the dust shield located inside the cavity formed by the housing of the head-up display and the dust shield, and the “outer side” refers to the side of the dust shield in contact with the external environment of the head-up display.

[0054] As known by those skilled in the art, when the absolute position of the described object changes, the relative positional relationship can also change accordingly, for example, after rotating the structure in the example embodiments of the present disclosure or changing the viewing direction and angle, “upper” can become “lower” or “left”, “right”, and such changes will not hinder the understanding of those skilled in the art.

[0055] For the convenience of explaining the scheme of the present disclosure, a possible application scenario provided by the present disclosure takes the application of a head-up display in a vehicle 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, a sanitation vehicle, a fire truck, a military vehicle, and of course, can also be applied to the field of ships, aviation, etc. For example, it can be applied to an aircraft such as a fighter jet, so that the pilot can track and aim at an object based on the assistance of the head-up display. The implementation 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 is in the form of image display, which projects relevant driving information in front of the driver's field of view. The head-up display is usually installed below the vehicle center console instrument panel through a support, so when the vehicle is running on uneven roads, passing through a speed reduction zone or high-speed driving, etc., the vehicle and the head-up display may vibrate, causing the display screen to vibrate.

[0057] The present disclosure provides an anti-shake optical path of a head-up display. For the convenience of explaining the scheme of the present disclosure, a head-up display is first provided, and the working principle of the head-up display is exemplarily explained.

[0058] The head-up display can include an image source and an image adjusting assembly. The image source is used to emit image light, and the image adjusting assembly is used to turn the image light emitted by the image source to a projection medium in front of the driver, and the projection medium reflects the image light to the eyebox 1 to form a target virtual image corresponding to the image light.

[0059] For example, the head-up display can include a first image source 71 for emitting first image light, and the image adjusting assembly is used to turn the image light emitted by the image source to the windshield 2, and the windshield 2 is used to reflect the first image light to the eyebox 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 a 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 a laser, a light-emitting diode, an organic light-emitting diode, an excited fluorescent light-emitting material, and a quantum dot excitation light source; the display imaging device can also include a dot matrix screen composed of light-emitting dots such as LEDs, MicroLEDs, OLEDs, and plasma light-emitting dots; 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), and Liquid Crystal Display (LCD), driven by light sources such as LEDs, MicroLEDs, OLEDs, lasers, and fluorescent lights or combinations thereof, reflected or transmitted by a digital micromirror display (DMD), LcoS, LCD, or the like, and then projected on a projection screen by a projection lens; the display imaging device can also include a laser beam scanning (LBS) projection imaging system in which a laser beam is scanned on a screen to form an image. All the display imaging devices described above can also be used as image sources via one or more times of refraction or reflection to form a real image or a virtual image.

[0061] Exemplarily, the image adjusting assembly includes a mirror, and can also include lenses or waveguides and the like. Exemplarily, the image adjusting assembly is also used to adjust image light, for example, to magnify an image, correct aberrations, and the like. It should be noted that in the exemplary embodiments of the present disclosure, the image adjusting assembly can include multiple optical elements, and different optical paths can pass through different optical elements in the image adjusting assembly. Therefore, the focal length, the object-side principal plane, and the image-side principal plane of the image adjusting assembly corresponding to different optical paths can also be different. The value of a certain physical quantity corresponding to the first / second image light refers to the value of the physical quantity in the optical path corresponding to the first / second image light. For example, the focal length of the image adjusting assembly 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 adjusting assembly is f1; the focal length of the image adjusting assembly 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 adjusting assembly is f2.

[0062] The eyebox 1 is the area where the driver or observer's eyes are located. In the design of a head-up display device, the range of the eyebox 1 can be determined according to the height, posture, etc. of the driver. The eyebox 1 defines an effective area of an eye point, and when the eye point position of the observer is within the 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 rays are emitted from the image source, enter the eyebox 1, and the range of the light propagation path between the boundary of the image source emitting the image light rays and the boundary of the eyebox 1 is the light envelope range of the image light rays. If the image light rays within the light envelope range are affected, the feedback in the eyebox 1 can be observed by the driver. For example, if the image light rays within the light envelope range are blocked, the image in the eyebox 1 is incomplete.

[0063] The head-up display anti-shake light path of the present disclosure is further described below by way of exemplary embodiments in conjunction with the accompanying drawings:

[0064] The present disclosure provides a head-up display anti-shake light path, comprising a first image source 71, an image adjusting assembly, and an image receiving device 8, the first image source 71 is used to emit first image light rays; the image adjusting assembly is used to turn the first image light rays to a projection medium, the projection medium is used to reflect the first image light rays to an eyebox 1 to form a first target virtual image corresponding to the first image light rays; the image receiving device 8 is arranged outside the light envelope range of the first image light rays and is fixed opposite to the first image source 71. The head-up display has a test light ray, the image receiving device 8 is used to receive the test light ray reflected by the image adjusting assembly, to obtain the shaking amount of the image adjusting assembly, the head-up display determines the picture offset compensation amount according to the shaking amount of the image receiving device 8, and the first image source 71 is used to adjust the first image light rays according to the picture offset compensation amount.

[0065] The first image source 71, the projection medium, the image adjusting assembly, and the eyebox 1 can refer to the foregoing exemplary description, and in subsequent embodiments of the present disclosure, the projection medium is taken as the windshield 2 as an example. The light envelope range of the first image light rays is the range of the light propagation path between the boundary of the first image source 71 emitting the first image light rays and the boundary of the eyebox 1. The image receiving device 8 can be an image sensor and can receive the test light ray. For example, Figure 9 It is shown that the light envelope range of the first image light rays is located in the cavity of the head-up display, and the part below the dust shield 4.

[0066] The image adjusting assembly can include optical components such as lenses, mirrors, etc. to form a projection light path of the head-up display. The image adjusting assembly can need to change the working angle, position, etc. during the working process of the head-up display to adjust the imaging light path of the head-up display. Therefore, the image adjusting assembly can be movably arranged in the housing of the head-up display. During the running of the vehicle, the image adjusting assembly is shaken by the vehicle and the housing of the head-up display, and is also shaken relative to the housing of the head-up display. For example, the image adjusting assembly can include a first mirror 5, and the first mirror 5 can be rotatably connected to the housing of the head-up display through a rotation shaft of the first mirror 5, so that the inclination angle of the reflecting surface of the first mirror 5 is adjustably arranged relative to the housing of the head-up display. Compared with the parts fixedly connected to the housing of the head-up display, the support rigidity of the optical parts movably arranged in the housing of the head-up display is poorer, and the optical parts are more likely to be shaken relative to the housing of the head-up display.

[0067] The present disclosure introduces a test light in the head-up display, the test light is reflected by the image adjusting assembly and is absorbed by the image receiving device 8. Since the image receiving device 8 and the first image source 71 are relatively fixed, for example, the image receiving device 8 and the first image source 71 can be movably arranged in the housing of the head-up display in a fixedly connected manner, and have high support rigidity, so that the test light can reflect the shaking condition of the image adjusting assembly relative to the first image source 71 and the image receiving device 8, that is, the shaking condition of the image adjusting assembly relative to the fixed parts of the head-up display. The image receiving device 8 does not contact the image adjusting assembly, and therefore does not change the performance of the image adjusting assembly. According to the shaking amount of the image adjusting assembly obtained by 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 the compensation is performed at the first image source 71 of the image emitting end, so that the influence of the shaking of the image adjusting assembly on the imaging effect can be weakened or even eliminated.

[0068] In an exemplary embodiment of the present disclosure, reference is made to Figure 1As shown, the head-up display can include a dust shield 4. The dust shield 4 is fastened to the housing of the head-up display. The dust shield 4 includes a light transmission opening through which the image adjusting assembly is configured to turn the first image light to pass through the dust shield 4 to the windshield 2. The dust shield 4 can include a transparent substrate which can be made of optical plastic such as polymethyl methacrylate (PMMA), polystyrene (PS), or polyethylene (PE), etc. The transparent substrate has good light transmission and can be used to isolate water vapor and impurities. The image receiving device 8 can be disposed on the inner wall of the dust shield 4 and outside the light transmission opening. Exemplarily, the dust shield 4 has a first light shield 31 and a second light shield 32 outside the dust shield 4. In the direction of light propagation between the windshield 2 and the eyebox 1, i.e. the direction of travel of the vehicle, the first light shield 31 and the second light shield 32 define the light transmission opening. The first light shield 31 can block part of the sunlight from the direction of the windshield 2 from entering the head-up display, and the second light shield 32 can suppress the stray light located at the edge of the light transmission opening from entering the eyebox 1.

[0069] The image receiving device 8 is disposed on the inner wall of the dust shield 4 and outside the light transmission opening. On the one hand, the image receiving device 8 does not enter the light envelope of the first image light, so as not to affect the image in the eyebox 1. On the other hand, the dust shield 4 can be fixed to the housing of the head-up display by adhesive or bolt connection, etc. around the dust shield 4, which has high support stiffness and is conducive to improving the anti-shake ability of the image receiving device 8, improving the accuracy of the shaking amount of the image adjusting assembly detected by the image receiving device 8, and making the shaking of the first image source 71 to the image adjusting assembly more accurate compensation. Exemplarily, referring to Figure 1 As shown, the image receiving device 8 is located on one side of the first direction of the light transmission opening. The first direction is the direction of light propagation between the windshield 2 and the eyebox 1, i.e. the direction of travel of the vehicle.

[0070] In an exemplary embodiment of the present disclosure, referring to Figure 1As shown, the image adjusting assembly can include a second mirror 6, and the first image light rays emitted by the first image source 71 pass through the second mirror 6 and the first mirror 5 in sequence to the windshield 2. Exemplarily, the second mirror 6 is a plane mirror, which can turn the light rays in the horizontal field of view direction and the vertical field of view direction, and the reflecting surface of the first mirror 5 can be a free-form surface, which can correct the image in addition to turning the light rays. Alternatively, the second mirror 6 and the first mirror 5 can both be curved mirrors. The first mirror 5 can be rotatably connected to the housing of the head-up display through its rotation axis to adapt to multiple positions of the eyebox 1, so as to match different heights and postures of the observer. The second mirror 6 can be relatively fixed to the housing of the head-up display to reduce the image jitter during the travel of the vehicle. For example, the second mirror 6 can be adhered to the outside of the housing of the head-up display through the non-optical surface of the outer periphery of the second mirror 6, and the reflecting surface of the second mirror 6 is exposed in the inner cavity of the housing of the head-up display and opposite to the first mirror 5 and the first image source 71.

[0071] In an exemplary embodiment of the present disclosure, with reference to Figure 1 As shown, the part of the first image light rays emitted by the first image source 71 that is outside the light envelope range forms the test light rays. Specifically, Figure 1 A possible light path of the test light rays is shown by a dashed line in FIG. 6.

[0072] Exemplarily, the first image light rays emitted by the first image source 71 pass through the second mirror 6 and the first mirror 5 in sequence. By designing the matching relationship between the eyebox 1 and the projection light path, the first image light rays reflected by the central region of the reflecting surface of the second mirror 6 and the first mirror 5 can be emitted through the light passage, and the first image light rays reflected by the edge region of the reflecting surface of the second mirror 6 or the first mirror 5 are outside the light envelope range. Since the edge region of the reflecting surface is usually larger than the light envelope, it is used for the test light rays, which does not affect the imaging of the first image light rays.

[0073] Exemplarily, the image receiving device 8 is a camera, as shown in FIG. 7. Figure 1 As shown in FIG. 7, when the image receiving device 8 is arranged on the side of the eyebox 1 close to the light passage in the first direction, Figure 2 An image that can be seen in the eyebox 1 is shown in FIG. 7. Since the image receiving device 8 is outside the light envelope range, the user can see the entire picture displayed by the head-up display. Figure 3 An image received by the image receiving device 8 is shown in FIG. 8. The test light rays fail to contain the image information in the complete first image light rays; therefore, the picture taken by the image receiving device 8 is incomplete. In the exemplary embodiment, the head-up display can calculate the jitter amount of the image adjusting assembly according to the incomplete picture received by the image receiving device 8.

[0074] In an exemplary embodiment of the present disclosure, the anti-shake optical path of the head-up display further comprises a reference image source 9, and the reference image source 9 is configured to emit a test light ray Figure 4 As shown in the figure, the reference image source 9 is configured to emit the test light ray. The reference image source 9 can be a fixed light source, such as a point light source or a cross-shaped image source, and can emit the test light ray with a fixed position over time. In the exemplary embodiment, the head-up display can calculate the shake amount of the image adjustment assembly according to 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, such as being arranged in a fixed connection manner in the housing of the head-up display. The reference image source 9 can be arranged on the inner wall of the dust shield 4 and located outside the light passage, such as being located on the side of the first direction of the light passage and close to the eye box 1. The image receiving device 8 can be arranged near the first image source 71. The first image light ray emitted by the first image source 71 can be reflected at the central region of the reflecting surface of the second mirror 6 and the first mirror 5, and the test light ray emitted by the reference image source 9 can be reflected at the edge region of the reflecting surface of the second mirror 6 and the first mirror 5, so as to enter the image receiving device 8 located outside the light envelope.

[0076] For another example, the reference image source 9 can be arranged on the inner wall of the dust shield 4 and located outside the light passage, such as being located on the side of the first direction of the light passage and close to the windshield 2. The image receiving device 8 can be arranged near the first image source 71. Figure 4 As shown in the figure, the reference image source 9 can be arranged on the inner wall of the dust shield 4 and located outside the light passage, such as being located on the side of the first direction of the light passage and close to the windshield 2. 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 dust shield 4 close to the windshield 2, so as to make the reference image source 9 closer to the edge region of the first mirror 5, facilitate the arrangement of the reference image source 9, and prevent the test light ray emitted by the reference image source 9 from interfering with the first image light ray used for imaging.

[0077] In the description of the exemplary embodiment of the present disclosure, the reference image source 9 can be arranged on the inner wall of the dust shield 4, which can mean that the reference image source 9 is directly arranged on the inner wall of the dust shield 4 in contact with the inner wall of the dust shield 4, or indirectly arranged on the inner wall of the dust shield 4 through an intermediate structure connected with the inner wall of the dust shield 4, or arranged on a structural member near the inner wall of the dust shield 4.

[0078] In an exemplary embodiment of the present disclosure, the second mirror 6 is configured to reflect the first image light ray and transmit the test light ray, and the reference image source 9 and the image receiving device 8 are respectively located on the two sides of the second mirror 6 in the light path of the test light ray. As shown in the figure, the reference image source 9 can be arranged on the rear side of the second mirror 6, the first image light ray emitted by the first image source 71 is reflected by the second mirror 6 to the first mirror 5, the test light ray emitted by the reference image source 9 is transmitted by the second mirror 6 to the first mirror 5, and is reflected by the first mirror 5 to the image receiving device 8. Figure 5 As shown in the figure, the reference image source 9 can be arranged on the rear side of the second mirror 6, the first image light ray emitted by the first image source 71 is reflected by the second mirror 6 to the first mirror 5, the test light ray emitted by the reference image source 9 is transmitted by the second mirror 6 to the first mirror 5, and is reflected by the first mirror 5 to the image receiving device 8.

[0079] In an example embodiment, the test light has a first wavelength, which 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 light path, external sunlight focused on the image source, such as an LCD screen, by the image adjustment assembly can cause the image source to fail or be damaged at high temperature. The second mirror 6 is configured 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 mirror 6, the second mirror 6 can transmit the first wavelength in the sunlight, thereby reducing the light energy reflected by the second mirror 6 to the first image source 71 and protecting the image source. For example, the second mirror 6 is configured to reflect visible light and transmit near-infrared light.

[0080] In an example embodiment of the present disclosure, the head-up display further comprises a second image source 72 configured to emit second image light. The image adjustment assembly is further configured to fold the second image light to the projection medium, and the projection medium is configured to reflect the second image light to the eyebox 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 double-focal-plane display.

[0081] Reference Figure 6 As shown, the second image source 72 can be disposed on opposite sides of the second mirror 6 from the first image source 71, respectively. The second mirror 6 is configured 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 mirror 6 and is incident on the first mirror 5, which folds the second image light to the windshield 2.

[0082] In an example embodiment of the present disclosure, the second image source 72 can also adjust the second image light according to the picture shift compensation amount. Compensation at the image emission end of the second image source 72 can weaken or even eliminate the influence of the jitter of the image adjustment assembly 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 be communicatively connected to the image receiving device 8. The image receiving device 8 can obtain the jitter amount of the image adjustment assembly according to 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 shift compensation amount corresponding to the first image light according to the jitter amount of the image adjustment assembly and adjust the first image light. The second image source 72 can obtain the picture shift compensation amount corresponding to the second image light according to the jitter amount of the image adjustment assembly and adjust the second image light. The picture shift compensation amount corresponding to the first image light can be different from the picture shift compensation amount corresponding to the second image light.

[0084] In an example embodiment, the second image light rays emitted by the second image source 72 form the test light rays outside the light envelope range. Specifically, the matching relationship between the eyebox 1 and the projection light path can be designed such that the second image light rays reflected by the central region of the reflecting surface of the first mirror 5 can exit through the light exit opening and be within the light envelope range, while the second image light rays reflected by the edge region of the reflecting surface of the first mirror 5 are outside the light envelope range.

[0085] In another example embodiment, the reference image source 9 can be arranged at the rear side of the second mirror 6, i.e., the reference image source 9 and the second image source 72 are arranged at the same side of the second mirror 6. Specifically, the reference image source 9 can be arranged at the side of the second image source 72 close to the dust shield 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 at the inner wall of the dust shield 4 and at the side close to the eyebox 1 in the first direction of the light exit opening. As shown, the test light rays emitted by the reference image source 9 are reflected by the edge region of the reflecting surface of the first mirror 5 away from the dust shield 4, thereby entering the image receiving device 8 outside the light envelope range. The position of the reference image source 9 close to the image receiving device 8 is advantageous for utilizing the space below the second light shield 32, making the structural arrangement more compact and facilitating the connection of circuit wires. Figure 6

[0086] In an example embodiment of the present disclosure, the inclination angle of the reflecting surface of the second mirror 6 is adjustably arranged relative to the housing of the head-up display, and the reference image source 9 is arranged at the side of the second image source 72 close to the dust shield 4 in the vertical direction perpendicular to the first direction (i.e., the direction perpendicular to the road surface). As shown, the test light rays emitted by the reference image source 9 are reflected by the edge region of the reflecting surface of the first mirror 5 away from the dust shield 4, thereby entering the image receiving device 8 outside the light envelope range. The position of the reference image source 9 close to the image receiving device 8 is advantageous for utilizing the space below the second light shield 32, making the structural arrangement more compact and facilitating the connection of circuit wires. Figure 4

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

[0088] The jitter amount can be represented by the change in position or angle of the jitter element in the light path, for example, the jitter amount can be represented by the angle change amount of the jitter element. Taking the inclination angle of the reflecting surface of the first mirror 5 as an example, how the jitter of the first mirror 5 relative to the first image source 71 affects the image is described. Referring to Figure 7 ​​As shown, the solid line shows the initial position 51 of the first mirror 5, and the dashed line shows the dithered position 52 of the first mirror 5 after the dithering causes rotation, the included angle between the two is the rotation angle R0, i.e. the dithering amount of the first mirror 5. The angle offset amount of the test light reflected by the first mirror 5 is R1, R1 = K1 * R0, and the head-up display is configured to calculate the picture offset compensation amount according to the angle offset amount R1 of the test light reflected by the first mirror 5. Wherein, K1 is the magnification coefficient of the optical path between the first mirror 5 and the image receiving device 8, i.e. the change rate of the angle change on the first mirror 5 to the change at the end of the optical path.

[0089] Exemplarily, the first mirror 5 is a plane mirror, and the first mirror 5 is the last optical element with a non-zero focal length in the optical path of the light projected to the image receiving device 8. K1 is the magnification coefficient of the optical path between the first mirror 5 and the image receiving device 8, K1 = K0 = 2.

[0090] Exemplarily, the first mirror 5 is a curved mirror. For example, the first mirror 5 is a concave spherical or cylindrical mirror. When R0 is lower than a preset first angle threshold, i.e. in the case that the dithering amount of the first mirror 5 is very small, the change of the reflection position and the focal length of the first image light and the test light on the reflection surface of the first mirror 5 has little effect on the magnification coefficient, and can be ignored, and K1 = K0 = 2 is taken. When R0 reaches the preset first angle threshold, i.e. in the case that the dithering amount of the first mirror 5 is large, the magnification coefficient can be corrected according to the results of the pre-calibration, and K1 = "K0" is taken, which is the correction coefficient of the magnification coefficient K1 caused by the change of the reflection position and the curvature of the reflection surface of the first mirror 5 from the initial position 51 to the dithered position 52.

[0091] For other dithering elements, for example, the image adjusting assembly can include a transmissive element such as a lens, and for the dithering of the transmissive element relative to the first image source 71, the image receiving device 8 is configured to receive the test light transmitted by the transmissive element. The included angle between the initial position and the position after the dithering causes rotation of the transmissive element is R0, i.e. the dithering amount of the transmissive element, and the angle offset amount of the test light transmitted by the transmissive element is R1, and the head-up display is configured to calculate the picture offset compensation amount according to the angle offset amount R1 of the test light transmitted by the transmissive element. The magnification coefficient K1 of the optical path between the transmissive element and the image receiving device 8 can be determined by the results of the pre-calibration.

[0092] Reference Figure 8The imaging of the image receiving device 8 detecting the received test light lines twice is shown. The first image light line emitted by the first image source 71 is reflected / refracted by the elements in the image adjusting assembly, and the corresponding focal length is f1; the focal length of the lens in the image receiving device 8 is f2, and the offset P2 of the test image obtained by the image receiving device 8 twice detection is obtained by image processing, and then there is:

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

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

[0095] In an exemplary embodiment of the present disclosure, the image receiving device 8 can be communicatively connected with 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 shaking effect corresponding to the shaking amount of the image adjusting assembly 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 further comprises a shaking sensor fixed relative to the image receiving device 8, and the shaking sensor is used to obtain the whole machine shaking amount of the head-up display, and the head-up display further obtains the picture offset compensation amount according to the whole machine shaking amount of the head-up display.

[0097] During the driving of the vehicle, the head-up display rises and falls, tilts and the like with the vehicle, which also causes the shaking R2 of the head-up display device as a whole with the vehicle. That is, the shaking of the display picture of the head-up display can be the superposition of the shaking amount of the shaking element in the image adjusting assembly relative to the fixed components such as the shell of the head-up display, the image source and the like (the shaking amount of the image adjusting assembly) and the shaking amount of the head-up display device as a whole relative to the vehicle (the whole machine shaking amount of the head-up display). In the exemplary embodiment of the present disclosure, the shaking sensor is fixed relative to the image receiving device 8, and the shaking condition of the head-up display device as a whole with the vehicle can be obtained. The shaking sensor can be a rotation sensor, an acceleration sensor and the like.

[0098] Specifically, the head-up display obtains a picture offset compensation amount according to a whole machine jitter amount of the head-up display. An optical path L1 from an eyebox 1 to a virtual image is not equal to an equivalent optical path Lf between the eyebox 1 and an image adjustment assembly. The difference is compensated by an image source, and the compensation amount is C2. An optical path coefficient K2 is used to compensate the difference between the optical path L1 and the optical path Lf, K2≈Lf / L1, and K2=Lf / L1 can be used for calculation. β is an angular magnification of a projection light path of the head-up display, which can be obtained by an image size on an image source light emitting surface (for example, a display screen surface) and an image angular span seen by the human eye, and has a unit of mm / °. Therefore, C2=K2*R2 / β.

[0099] For example, the head-up display can obtain a picture offset compensation amount according to a jitter amount of the image adjustment assembly and a whole machine jitter amount of the head-up display. The jitter amount of the image adjustment assembly can reflect jitter information carried by a test light passing through a jitter element in the image adjustment assembly, and the whole machine jitter amount of the head-up display can reflect jitter information of the whole head-up display device. For example, the jitter of the jitter element in the image adjustment assembly 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 whole head-up display device relative to the whole vehicle can be compensated separately, and the picture offset compensation amount is C=C2. For another example, the superposition of the two kinds of jitter can be compensated, and the picture offset compensation amount is C=C1+C2.

[0100] In an exemplary embodiment of the present disclosure, the jitter amount of the image adjustment assembly can also be obtained by 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 assembly and received by the image receiving device 8, the offset amount P2 of the images 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 the difference between the optical path L1 and the optical path Lf, and the calculation of K2 has been described in the foregoing exemplary embodiment. f2 is the focal length of the lens in the image receiving device 8. When the jitter amount Ri is lower than a preset second angle threshold, it is evaluated that the anti-jitter effect of the internal elements of the head-up display is qualified, and the anti-jitter effect of the head-up display can be output as qualified. When Ri reaches the preset second angle threshold, the anti-jitter effect of the internal elements of the head-up display is output as unqualified, and a warning information can be sent or further anti-jitter measures can be started.

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

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

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

[0104] Step S300: calculating the picture shift compensation amount according to the shaking amount of the image adjusting assembly, the whole-head shaking 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 picture shift compensation amount.

[0106] The step S100 of obtaining the shaking amount of the image adjusting assembly through the image receiving device 8 and the step S200 of obtaining the shaking amount of the image adjusting assembly through the shaking sensor can refer to the description of the anti-shaking light path of the head-up display in the foregoing exemplary embodiments, and will not be described here again.

[0107] The step S300 can further include:

[0108] Step S310: calculating a first compensation amount C1 according to the shaking amount of the image adjusting assembly, C1 = P2*f1 / f2, P2 is the shift amount corresponding to the test image obtained by the image receiving device 8 through twice detection, f1 is the focal length of the image light emitted by the image source passing through the image adjusting assembly, and f2 is the lens focal length of the image receiving device 8;

[0109] Step S320: calculating a second compensation amount C2 according to the whole-head shaking 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 between the eyebox 1 and the image adjusting assembly, L1 is the optical path from the eyebox 1 to the target virtual image corresponding to the eyebox 1 of the image light, and β is the angular magnification of the projection light path of the head-up display;

[0110] Step S330: calculating the picture shift compensation amount, the picture shift 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 can include a first image source 71 for emitting first image light to form a first target virtual image corresponding to the first image light in the eyebox 1, and the image source can further include a second image source 72 for emitting second image light to form a second target virtual image corresponding to the second image light in the eyebox 1.

[0112] The head-up display anti-shake method of the present disclosure can introduce test light to pass through the image adjustment assembly for reflection, obtain the shaking condition of the image adjustment assembly relative to the fixing part of the head-up display, and can obtain the shaking condition of the head-up display device as a whole relative to the whole vehicle through the shaking sensor, and then compensate the image source picture, so as to weaken or even eliminate the influence of the shaking of the head-up display on the imaging effect, and improve the stability of the projection picture.

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

[0114] Step S1000: According to the test light reflected by the image adjustment assembly received by the image receiving device 8, the shaking amount of the image adjustment assembly is obtained, and 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.

[0115] Step S2000: The anti-shake effect of the head-up display is evaluated through the shaking amount.

[0116] In step S2000, the anti-shake effect of the head-up display is evaluated through the shaking amount, which can include:

[0117] Step S2100: The offset P2 of the images corresponding to the test light obtained by the two detections is obtained.

[0118] Step S2200: The shaking amount Ri is calculated according to the offset P2, wherein Ri = K2*atan(P2 / f2), the optical path coefficient K2 = Lf / L1, Lf is the equivalent optical path between the eyebox and the image adjustment assembly, L1 is the optical path from the eyebox to the target virtual image of the image light corresponding to the eyebox, and f2 is the focal length of the lens of the image receiving device 8.

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

[0120] In step S1000, the shaking amount of the image adjustment assembly is obtained according to the image receiving device 8, and in step S2100, the offset P2 of the images corresponding to the test light obtained by the two detections is obtained, which can refer to the description of the anti-shake optical path of the head-up display in the foregoing exemplary embodiments, and will not be described here.

[0121] The head-up display anti-shake detection method provided by the present disclosure can introduce test light to pass through the image adjustment assembly for reflection, obtain the shaking condition of the image adjustment assembly relative to the fixing part of the head-up display, and evaluate the anti-shake effect of the image adjustment assembly by comparing the shaking amount Ri with the preset second angle threshold.

[0122] In an exemplary embodiment of the present disclosure, the anti-jitter detection method of the head-up display provided by the present disclosure tests the anti-jitter effect of the image adjustment assembly, the image receiving device 8 can be in communication connection with the auxiliary display device, the auxiliary display device plays the test image received by the image receiving device 8 in real time and continuously, and the anti-jitter effect evaluation result of the image adjustment assembly can also be output through the auxiliary display device. When Ri reaches the preset second angle threshold value, a pre-warning information can be sent through the auxiliary display device. Other embodiments of the present disclosure will be readily apparent to those skilled in the art upon considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure following the general principles thereof and including other known or customary technical methods not specifically disclosed in the present disclosure. The specification and examples are to be regarded as illustrative only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

[0123] It should be understood that the present disclosure is not limited to the precise structures as herein described and illustrated in the drawings, and that various modifications and changes can be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A head-up display anti-jitter optical path, characterized in that, The head-up display comprises: a first image source (71) for emitting first image light rays; an image adjusting assembly for deflecting the first image light rays to a projection medium, the projection medium being configured to reflect the first image light rays to an eyebox (1) to form a first target virtual image corresponding to the first image light rays; an image receiving device (8) disposed outside a light envelope range of the first image light rays and fixed opposite to the first image source (71), the light envelope range being a light propagation path range between a boundary of the first image source (71) emitting the first image light rays and a boundary of the eyebox (1); a reference image source (9) for emitting test light rays, the reference image source (9) being a fixed light source and emitting the test light rays with a fixed light emitting position; the image receiving device (8) is configured to receive the test light rays reflected by the image adjusting assembly to obtain a jitter amount of the image adjusting assembly, the head-up display is configured to determine a picture offset compensation amount according to the jitter amount of the image adjusting assembly, and the first image source (71) is configured to adjust the first image light rays according to the picture offset compensation amount.

2. The head-up display anti-jitter optical path of claim 1, wherein, The head-up display comprises a dustproof plate (4) fastened to a shell of the head-up display; the dustproof plate (4) comprises a light transmission port, the image adjusting assembly is configured to deflect the first image light rays from the light transmission port to pass through the dustproof plate (4) to the projection medium, and the image receiving device (8) is disposed on an inner wall of the dustproof plate (4) and located outside the light transmission port.

3. The head-up display anti-jitter optical path of claim 2, wherein, The image receiving device (8) is located on one side of a first direction of the light transmission port, and the first direction is a light propagation direction between the projection medium and the eyebox (1).

4. The head-up display anti-jitter optical path of claim 1, wherein, The image adjusting assembly comprises a first mirror (5) and a second mirror (6), the first image light rays emitted by the first image source (71) pass through the second mirror (6) and the first mirror (5) in sequence to the projection medium, a reflecting surface of the first mirror (5) is rotatably arranged opposite to the image receiving device (8), the second mirror (6) is configured to reflect the first image light rays and transmit the test light rays, and the reference image source (9) and the image receiving device (8) are respectively located on two sides of the second mirror (6) in a light path of the test light rays.

5. The head-up display anti-jitter optical path of claim 4, wherein, The test light rays have a first wavelength, and the first wavelength is outside a wavelength range of the first image light rays.

6. The head-up display anti-jitter optical path of claim 4, wherein, The head-up display further comprises a second image source (72) for emitting second image light rays, and the image adjusting assembly is further configured to deflect the second image light rays to the projection medium, the projection medium being configured to reflect the second image light rays to the eyebox (1) to form a second target virtual image corresponding to the second image light rays. The first image light rays emitted by the first image source (71) form the test light rays outside the light envelope range, or the second image light rays emitted by the second image source (72) form the test light rays outside the light envelope range.

7. The head-up display anti-jitter optical path of claim 6, wherein, The second mirror (6) is used for reflecting the first image light and transmitting the second image light, the second image light emitted by the second image source (72) passes through the second mirror (6) and is incident on the first mirror (5), and the reflection angle of the test light on the reflection surface of the first mirror (5) is within the reflection angle of the second image light on the reflection surface of the first mirror (5).

8. The head-up display anti-jitter optical path of claim 1, wherein, The head-up display calculates the picture offset compensation amount according to the jitter amount and the magnification of the image adjusting assembly to the first image source (71).

9. The head-up display anti-jitter optical path of claim 8, wherein, The head-up display further comprises a jitter sensor fixed opposite to the image receiving device (8), and the jitter sensor is used for acquiring the whole machine jitter amount of the head-up display, and the head-up display further acquires the picture offset compensation amount according to the whole machine jitter amount.

10. A head-up display anti-jitter method, characterized by, Comprise: Receiving the test light reflected by the image adjusting assembly of the head-up display through the image receiving device (8) to acquire the jitter amount of the image adjusting assembly; The image receiving device (8) is arranged outside the light envelope range of the image light and is fixed opposite to the image source of the head-up display, the test light is emitted by the reference image source (9), the reference image source (9) is a fixed light source, and the position of the emitted light does not change with time The test light; Acquiring the whole machine jitter amount of the head-up display through the jitter sensor fixed opposite to the image receiving device (8); According to the jitter amount of the image adjusting assembly, the whole machine jitter amount of the head-up display and the magnification of the head-up display, the picture offset compensation amount is calculated; The image source is controlled to adjust the image light according to the picture offset compensation amount.

11. The head-up display anti-jitter method of claim 10, wherein, According to the jitter amount of the image adjusting assembly, the whole machine jitter amount of the head-up display and the magnification of the head-up display, the picture offset compensation amount is calculated, comprising: According to the jitter amount of the image adjusting assembly, a first compensation amount C1 is calculated, C1=P2*f1 / f2, P2 is the offset amount corresponding to the test image obtained by twice detection of the image receiving device (8), f1 is the focal length of the image light emitted by the image source passing through the image adjusting assembly, and f2 is the focal length of the lens of the image receiving device (8); According to the whole machine jitter amount of the head-up display and the magnification of the head-up display, a second compensation amount C2 is calculated, C2=K2*R2 / β, R2 is the rotation angle of the shell of the head-up display, K2=Lf / L1, Lf is the equivalent optical path between the eyebox (1) and the image adjusting assembly, L1 is the optical path from the eyebox (1) to the target virtual image corresponding to the image light of the eyebox (1), and β is the angular magnification of the projection light path of the head-up display; The picture offset compensation amount C is the superposition of the first compensation amount C1 and the second compensation amount C2.

12. A head-up display anti-jitter detection method, characterized by, Comprise: According to the test light reflected by the image adjustment component received by the image receiving device (8), the jitter amount of the image adjustment component is obtained, the image receiving device (8) is arranged outside the light envelope range of the image light and is fixed opposite to the image source of the head-up display, the test light is emitted by a reference image source (9), the reference image source (9) is a fixed light source, and the position of the emitted light does not change with time; The anti-jitter effect of the head-up display is evaluated through the jitter amount; Wherein, the anti-jitter effect of the head-up display is evaluated through the jitter amount, comprising: Obtaining the offset amount P2 of the images corresponding to the test light obtained by the two detections; According to the offset amount P2, the jitter amount Ri is calculated, wherein Ri=K2*atan(P2 / f2), the optical path coefficient K2=Lf / L1, Lf is the equivalent optical path between the eyebox (1) and the image adjustment component, L1 is the optical path from the eyebox (1) to the target virtual image corresponding to the image light of the eyebox (1), and f2 is the focal length of the lens of the image receiving device (8); According to the relationship between the jitter amount Ri and the second angle threshold, an evaluation result is output, and when Ri is lower than the second angle threshold, the anti-jitter effect of the head-up display is qualified.

Images