Test bench of head-up display

Abstract

The invention relates to a test bench of a head-up display. The test bed of the head-up display comprises a base and a supporting assembly, the supporting assembly comprises a supporting frame, an adjusting mechanism and a mounting bracket, the supporting frame is fixed on the base, the adjusting mechanism is arranged between the supporting frame and the mounting bracket, and the adjusting mechanism is used for changing the relative position relation between the supporting frame and the mounting bracket. The number of the supporting assemblies is multiple. According to the test bench of the head-up display, the optical imaging effect of the head-up display can be tested after the production of the components of the optical system of the head-up display, such as the first reflecting mirror, the second reflecting mirror and the optical machine module, so that the development period of the head-up display can be shortened.

Description

Technical Field

[0001] The present disclosure relates to the technical field of head-up display, and in particular to a test bench for a head-up display. Background Art

[0002] During the development of the head-up display, the in-vehicle display effect of the head-up display needs to be demonstrated and debugged on a test bench to optimize the in-vehicle display effect of the head-up display.

[0003] In the prior art, the HUD prototype is usually installed on a test bench after all the parts of the HUD are manufactured, so as to simulate the projection display effect. However, since the design and manufacturing of the parts of the whole machine take a long time, the time left for optimizing the display effect is greatly reduced. Moreover, after optimizing the design of the HUD parts, it is necessary to wait for the parts to be manufactured and reassemble the test prototype before testing can be carried out, which leads to a long development cycle of the HUD.

[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 test bench for a head-up display, which can be used to test the optical imaging effect of the head-up display after the components of the head-up display optical system, such as the first reflector, the second reflector and the optical-mechanical module, are produced, thereby shortening the development cycle of the head-up display.

[0006] The present disclosure provides a test bench for a head-up display, comprising:

[0007] Base;

[0008] The support assembly includes a support frame, an adjustment mechanism and a mounting bracket. The support frame is fixed to the base, and the adjustment mechanism is arranged between the support frame and the mounting bracket. The adjustment mechanism is used to change the relative position relationship between the support frame and the mounting bracket; wherein the support assembly is arranged in multiple groups.

[0009] In an exemplary embodiment of the present disclosure, multiple groups of support assemblies include a first support assembly, a second support assembly and a third support assembly, wherein the first support assembly includes a first mounting bracket for mounting a first reflector of a head-up display; the second support assembly includes a second mounting bracket for mounting a second reflector of the head-up display; and the third support assembly includes a third mounting bracket for mounting an optical-mechanical module of the head-up display.

[0010] In an exemplary embodiment of the present disclosure, one end of the support frame away from the base has an inclined surface, and an angle α between the inclined surface and the base is greater than 0° and less than 90°.

[0011] In an exemplary embodiment of the present disclosure, the first support assembly includes a first support frame, the second support assembly includes a second support frame, and the third support assembly includes a third support frame; the second support frame, the third support frame and the first support frame are arranged in sequence along a direction parallel to the base; the first support frame has a first inclined surface at one end away from the base, the second support frame has a second inclined surface at one end away from the base, and the third support frame has a third inclined surface at one end away from the base, wherein the first inclined surface is higher than the second inclined surface in a height direction perpendicular to the base, and the first inclined surface is higher than the third inclined surface in a height direction perpendicular to the base.

[0012] In an exemplary embodiment of the present disclosure, the head-up display has a standard eye box state; the angle α1 between the first inclined surface and the base is equal to the angle between the first reflector and the reference mounting plane of the head-up display in the standard eye box state; the angle α2 between the second inclined surface and the base is equal to the angle between the second reflector and the reference mounting plane of the head-up display in the standard eye box state; the angle α3 between the third inclined surface and the base is equal to the angle between the light emitting surface of the optical-mechanical module and the reference mounting plane of the head-up display in the standard eye box state.

[0013] In an exemplary embodiment of the present disclosure, the first support assembly includes a first adjustment mechanism, which is arranged between the first support frame and the first mounting bracket; the first mounting bracket is a groove-type bracket, and the extended ends of the two leg surfaces of the first mounting bracket are respectively provided with positioning blocks, and the positioning blocks are used to abut against the side edges of the first reflector; the extended ends of the two leg surfaces are respectively provided with mounting columns on the opposite sides, and the first support assembly also includes a locking plate, which is rotatably connected to the mounting columns one by one; wherein the locking plate is used to clamp the first reflector between the locking plate and the extended ends of the leg surfaces; the locking plate has a notch, and the notch is used to disengage the locking plate from the first reflector during the rotation of the locking plate around the mounting column.

[0014] In an exemplary embodiment of the present disclosure, the second support assembly includes a second adjustment mechanism, which is arranged between the second support frame and the second mounting bracket; the second mounting bracket includes a bracket body and a positioning plate, the bracket body is connected to the second adjustment mechanism, and the positioning plate is arranged at one end of the bracket body away from the second adjustment mechanism; wherein, the positioning plate has an arc-shaped mounting surface on a side away from the bracket body, and a reflector positioning hole and a reflector supporting boss are provided on the arc-shaped mounting surface, the reflector positioning hole is used to match with the reflector positioning pin located on the back side of the second reflector, and the reflector supporting boss is used to match with the positioning boss located on the back side of the second reflector.

[0015] In an exemplary embodiment of the present disclosure, the third support assembly includes a third adjustment mechanism, which is arranged between the third support frame and the third mounting bracket; the third mounting bracket includes a base plate and two columns arranged on the base plate, the base plate is connected to the third adjustment mechanism, and the two columns are arranged at intervals on the side of the base plate away from the third adjustment mechanism to form an installation space between the two columns; the column has a positioning inclined surface on the side away from the base plate, and an optomechanical positioning pin is provided on the positioning inclined surface, and the optomechanical positioning pin is used to match with a shell positioning hole located on the shell of the optomechanical module so that at least part of the optomechanical module is installed within the installation space; wherein, the angle β between the positioning inclined surface and the base plate is equal to the angle α between the third inclined surface of the third support frame and the base.

[0016] In an exemplary embodiment of the present disclosure, the adjustment mechanism includes a linear adjustment mechanism, which includes a fixed plate, a movable plate, a guide rail and a screw drive structure; wherein the movable plate is mounted on the fixed plate through the guide rail, and the movable plate has a positioning surface, which is located on a side of the movable plate away from the fixed plate; the movable plate is drivingly connected to the screw drive structure, so that when the handle of the screw drive structure rotates, the screw of the screw drive structure drives the movable plate to slide on the fixed plate in a direction parallel to the positioning surface.

[0017] In an exemplary embodiment of the present disclosure, the adjustment mechanism includes a first linear adjustment mechanism and a second linear adjustment mechanism, the first linear adjustment mechanism includes a first fixed plate and a first movable plate, and the second linear adjustment mechanism includes a second fixed plate and a second movable plate; wherein the positioning surface of the first movable plate and the surface of the second fixed plate facing away from the second movable plate are parallel to and connected to each other, and the sliding directions of the first movable plate and the second movable plate are perpendicular.

[0018] In an exemplary embodiment of the present disclosure, the adjustment mechanism includes a rotation adjustment mechanism, and the rotation adjustment mechanism includes a fixed platform and a rotating platform, and the fixed platform and the rotating platform are coaxially rotatably connected.

[0019] On the one hand, the test bench of the head-up display disclosed in the present invention can test the optical imaging effect of the head-up display after the production of the components of the optical system such as the first reflector, the second reflector and the optical-mechanical module is completed, without waiting for the design and manufacture of other structural parts of the head-up display such as the upper cover and the bottom shell, thereby shortening the development cycle of the head-up display; on the other hand, the test bench disclosed in the present invention can realize the independent adjustment of the position and angle of each component of the optical system of the head-up display, so that the optical display effect corresponding to each component of the optical system of the head-up display in different positions can be tested, and the key factors affecting the imaging effect can be studied by adjusting the extreme positions of each part respectively, and the optical design boundary of the head-up display can be verified, so as to avoid the defects of image distortion, dizziness and the like that cannot be accepted by subjective evaluation due to the position tolerance between the components of the optical system such as the first reflector, the second reflector and the optical-mechanical module. In addition, since the installation and adjustment of each component of the optical system are independent of each other, the tolerance of non-optical structural parts such as the upper cover and the bottom shell used to install optical elements can be avoided from affecting the test results, so that the test results are more accurate, which is conducive to accurately optimizing the display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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.

[0021] 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:

[0022] Figure 1 is a schematic diagram of an exemplary embodiment of the test bench disclosed herein;

[0023] Figure 2 is a schematic diagram of a linear adjustment mechanism in an exemplary embodiment of the test bench disclosed herein;

[0024] Figure 3 is a schematic diagram of a linear adjustment mechanism in an exemplary embodiment of the test bench disclosed herein;

[0025] Figure 4A schematic diagram of a rotation adjustment mechanism in an exemplary embodiment of the test bench disclosed herein;

[0026] Figure 5 A schematic diagram of a support frame in an exemplary embodiment of a test bench disclosed herein;

[0027] Figure 6 is a schematic diagram of a first mounting bracket in an exemplary embodiment of the test bench of the present disclosure;

[0028] Figure 7 It is a schematic diagram of a state where a first mounting bracket is mounted with a first reflector in an exemplary embodiment of the test bench disclosed herein;

[0029] Figure 8 is a schematic diagram of a second mounting bracket and a second reflector in an exemplary embodiment of the test bench of the present disclosure;

[0030] Fig. 9 A schematic diagram of a third mounting bracket and an optical-mechanical module in an exemplary embodiment of the test bench disclosed herein;

[0031] Fig.10 FIG. 1 is a schematic diagram of a third mounting bracket in an exemplary embodiment of the test bench of the present disclosure.

[0032] The following are the descriptions of the reference numerals:

[0033] 1. First reflector; 2. Second reflector; 3. Optical-mechanical module;

[0034] 11. first support frame; 111. first inclined surface; 12. first adjustment mechanism; 13. first mounting bracket; 131. positioning block; 132. mounting column; 14. locking plate; 141. notch;

[0035] 21. second support frame; 211. second inclined surface; 22. second adjustment mechanism; 23. second mounting bracket; 231. bracket body; 232. positioning plate; 233. reflector positioning hole; 234. reflector support boss;

[0036] 31. third support frame; 311. third inclined surface; 32. third adjustment mechanism; 33. third mounting bracket; 331. base plate; 332. column; 333. positioning inclined surface; 334. optical mechanical positioning pin;

[0037] 4. Base; 5. Linear adjustment mechanism; 51. Fixed plate; 52. Moving plate; 521. Positioning surface; 53. Guide rail; 54. Screw drive structure; 541. Rotary handle; 55. Moving locking screw; 6. Rotary adjustment mechanism; 61. Fixed table; 62. Rotary table; 63. Fine-tuning rotary handle; 64. Fine-tuning locking screw. DETAILED DESCRIPTION

[0038] 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.

[0039] 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. "Include" or "comprise" and other similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Unless otherwise specified, the terms "connect", "fix", "install" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection, and can be directly connected or indirectly connected through an intermediate medium. The several parts described in the present disclosure are arranged along a certain direction, which is only used to indicate the relative positional relationship order of the several parts, and does not mean that the several parts are arranged along a straight line.

[0040] The present disclosure provides a test bench for a head-up display. A structural form of a head-up display in the related art is briefly described below. It should be noted that these explanations are for the convenience of understanding of those skilled in the art and do not constitute a limitation on the scope of protection claimed by this application.

[0041] Head Up Display (HUD), also known as Head-Up Display, is abbreviated as HUD. The principle of the head-up display is to project important driving information such as speed and navigation onto a projection medium, such as a windshield or a special screen in the cockpit, through a designed optical path. The image light enters the driver's eye box after being reflected by the projection medium, and the reverse extension line of the light forms a target virtual image at a preset position in front of the driver, thereby avoiding the safety hazards caused by the driver lowering his head to view the display information of the instrument or other driving assistance equipment, and increasing driving safety.

[0042] In the related art, a head-up display generally includes an optomechanical module 3, which is used to generate and emit image light. For example, the optical machine module 3 may include a shell and a display imaging device, and the shell is used to provide protection for the display imaging device; the display imaging device may include a liquid crystal screen, and the backlight source of the liquid crystal screen may include one or more of lasers, light-emitting diodes, organic light-emitting diodes, stimulated fluorescent materials, and quantum dot excitation light sources; the display imaging device may also include an actively luminous dot matrix screen composed of light-emitting point light sources such as LEDs, OLEDs, and plasma light-emitting points; or, the display imaging device may 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, OLEDs, lasers, and fluorescence, or a combination thereof, reflected or transmitted by display panels such as digital micromirror displays (DMD), LcoS, and LCDs, and then projected onto a projection screen through a projection lens to form an image; the display imaging device may also include a laser beam scanning (LBS) projection imaging system that scans a laser beam on a screen to form an image.

[0043] The head-up display may also include an image adjustment unit for adjusting and redirecting the image light from the optical-mechanical module 3 to the projection medium outside the head-up display. For example, the image adjustment unit includes a first reflector 1 and a second reflector 2. In an optical path of a head-up display, the image light generated by the display imaging device of the optical-mechanical module 3 is emitted from the light-emitting surface of the optical-mechanical module 3, passes through the first reflector 1 and the second reflector 2 in sequence, and is finally reflected by the second reflector 2 to the projection medium outside the head-up display. The first reflector 1, the second reflector 2 and the optical-mechanical module 3 constitute an optical system of the head-up display. For another example, the image adjustment unit includes a first reflector 1, a second reflector 2 and a third reflector. In an optical path of a head-up display, the image light generated by the display imaging device of the optical-mechanical module 3 is emitted from the light-emitting surface of the optical-mechanical module 3, passes through the first reflector 1, the second reflector 2 and the third reflector in sequence, and is finally reflected by the third reflector to the projection medium outside the head-up display. The first reflector 1, the second reflector 2, the third reflector and the optical-mechanical module 3 constitute an optical system of the head-up display. For another example, the image adjustment unit may also include only one reflector. In an optical path of a head-up display, the image light generated by the display imaging device of the optical-mechanical module 3 is emitted from the light-emitting surface of the optical-mechanical module 3, and then is reflected by the first reflector 1 to the projection medium outside the head-up display. The first reflector 1 and the optical-mechanical module 3 constitute the optical system of the head-up display. In the exemplary embodiment of the present disclosure, the first reflector 1, the second reflector 2 and the optical-mechanical module 3 constitute the optical system of the head-up display, and the windshield is used as an example to illustrate the projection medium that ultimately reflects the image light to the human eye.

[0044] In the related art, the head-up display includes not only the first reflector 1, the second reflector 2 and the optical-mechanical module 3, but also components such as an upper cover, a bottom shell, a sunshade and a reflector driving structure, wherein the optical-mechanical module 3 and the reflector driving structure are usually installed on the bottom shell, and the first reflector 1 and the second reflector 2 are installed on the upper cover or the bottom shell. For example, the second reflector 2 is rotatably connected to the upper cover, and the reflector driving structure is used to drive the second reflector 2 to rotate relative to the upper cover around the axis of the second reflector 2 itself, so that the image light emitted by the head-up display is reflected on the inner surface of the windshield to different eye box ranges. Exemplarily, corresponding to the different positions of the second reflector 2 when it rotates, the head-up display has a standard eye box state, a low eye box state and a high eye box state, which can respectively adapt to the eye box ranges of drivers with different heights and sitting postures.

[0045] Before the head-up display is mass-produced and installed on a vehicle, it is necessary to demonstrate and debug the display effect of the head-up display on a test bench. Based on this, the present disclosure provides a test bench for the head-up display. Figure 1As shown, it includes a base 4 and multiple groups of support components, wherein each group of support components includes a support frame, an adjustment mechanism and a mounting bracket, the support frame is fixed to the base 4, the adjustment mechanism is arranged between the support frame and the mounting bracket, and the adjustment mechanism is used to change the relative position relationship between the support frame and the mounting bracket. Multiple groups of support components can be used to respectively support the optical-mechanical module 3 of the head-up display and the reflector of the image adjustment unit. For example, the test bench can include two groups of support components, respectively used to support the first reflector 1 and the optical-mechanical module 3. For another example, multiple groups of support components can be used to respectively support the first reflector 1, the second reflector 2 and the optical-mechanical module 3 of the head-up display.

[0046] Specifically, for example, the first supporting assembly includes a first supporting frame 11, a first adjusting mechanism 12 and a first mounting bracket 13, the first adjusting mechanism 12 is arranged between the first supporting frame 11 and the first mounting bracket 13, and the first mounting bracket 13 is used to install the first reflector 1 of the head-up display; the second supporting assembly includes a second supporting frame 21, a second adjusting mechanism 22 and a second mounting bracket 23, the second adjusting mechanism 22 is arranged between the second supporting frame 21 and the second mounting bracket 23, and the second mounting bracket 23 is used to install the second reflector 2 of the head-up display; the third supporting assembly includes a third supporting frame 31, a third adjusting mechanism 32 and a third mounting bracket 33, the third adjusting mechanism 32 is arranged between the third supporting frame 31 and the third mounting bracket 33, and the third mounting bracket 33 is used to install the optical-mechanical module 3 of the head-up display.

[0047] The test bench of the head-up display disclosed in the present invention includes multiple groups of supporting components, which can independently install various components of the optical system of the head-up display on the base 4, and independently adjust their positions and angles through the adjustment mechanism. For example, the first mounting bracket 13, the second mounting bracket 23 and the third mounting bracket 33 can independently provide support for the first reflector 1, the second reflector 2 and the optical-mechanical module 3; through the first adjustment mechanism 12, the second adjustment mechanism 22 and the third adjustment mechanism 32, the positions and angles of the first reflector 1, the second reflector 2 and the optical-mechanical module 3 can be independently adjusted.

[0048] On the one hand, the test bench of the head-up display disclosed in the present invention can test the optical imaging effect of the head-up display after the production of the components of the optical system such as the first reflector 1, the second reflector 2 and the optical-mechanical module 3 is completed, without waiting for the design and manufacture of other structural parts of the head-up display such as the upper cover and the bottom shell, thereby shortening the development cycle of the head-up display; on the other hand, the test bench disclosed in the present invention can realize the independent adjustment of the position and angle of each component of the optical system of the head-up display, so that the optical display effect corresponding to each component of the optical system of the head-up display in different positions can be tested, and the key factors affecting the imaging effect can be studied by adjusting the extreme positions of each part respectively, and the optical design boundary of the head-up display can be verified, so as to avoid the defects of image distortion, dizziness, etc. that cannot be accepted by subjective evaluation due to the position tolerance of each component of the optical system such as the first reflector 1, the second reflector 2 and the optical-mechanical module 3. In addition, since the installation and adjustment of each component of the optical system are independent of each other, the tolerance of non-optical structural parts such as the upper cover and the bottom shell used to install optical elements can be avoided from affecting the test results, making the test results more accurate, which is conducive to accurately optimizing the display effect.

[0049] Specifically, in an exemplary embodiment of the present disclosure, referring to Figure 5 As shown, the base 4 is a rectangular aluminum plate, and a hollow area can be provided in the middle of the base 4 to reduce the weight of the base 4. The first support frame 11, the second support frame 21 and the third support frame 31 can all be made of aluminum plates and fixed to the base 4 by screws or rivets. The first mounting bracket 13, the second mounting bracket 23 and the third mounting bracket 33 can also be made of aluminum plates. For example, the thickness of the base 4 is 20 mm, referring to Figure 5 As shown, a first support frame 11 , a second support frame 21 and a third support frame 31 are provided in the middle area of ​​the base 4 , and a hollow area is provided in the edge area of ​​the base 4 to reduce the weight of the base 4 .

[0050] The adjustment mechanism is used to change the relative position relationship between the support frame and the mounting bracket, so that the positions of the first reflector 1, the second reflector 2 and the optical-mechanical module 3 can be adjusted independently to show the display effects of the first reflector 1, the second reflector 2 and the optical-mechanical module 3 in different positions. Among them, for the head-up display, in the spatial rectangular coordinate system, for any spatial rectangular coordinate system, the overall structural tolerance of the head-up display includes the movement tolerance of the head-up display as a whole in the X, Y, and Z directions and the rotation tolerance around the X, Y, and Z axes; the structural tolerance of the first reflector 1 includes the movement tolerance of the first reflector 1 itself in the X, Y, and Z directions and the rotation tolerance around the X, Y, and Z axes; the structural tolerance of the second reflector 2 includes the movement tolerance of the second reflector 2 itself in the X, Y, and Z directions and the rotation tolerance around the X, Y, and Z axes; the structural tolerance of the optomechanical module 3 includes the movement tolerance of the light-emitting surface of the optomechanical module 3 in the X, Y, and Z directions and the rotation tolerance around the X, Y, and Z axes. For example, if the optomechanical module 3 includes an LCD screen, the structural tolerance of the optomechanical module 3 includes the movement tolerance of the LCD screen in the X, Y, and Z directions and the rotation tolerance around the X, Y, and Z axes.

[0051] The first reflector 1, the second reflector 2 and the optomechanical module 3 form the optical system of the head-up display. In the early stage of the development of the head-up display, the tolerance factors of the optical transfer function (MTF) of the optical system of the head-up display can be found out through optical theory analysis. Among them, since the optical transfer function can characterize the quality of optical imaging, in the early stage of the development of the head-up display, the tolerance factors that have a greater impact on the optical transfer function can be first found out through optical theory analysis, marked as key tolerance factors, and the adjustment mechanism that can adjust the first reflector 1, the second reflector 2 and the optomechanical module 3 in the dimension where the key tolerance factor is located can be designed in a targeted manner according to the key tolerance factors. In this way, the reasonable range of such key tolerances that have a greater impact on the imaging quality can be verified in a targeted manner, and the subsequent optimization design and processing can be guided.

[0052] Exemplarily, the first adjustment mechanism 12 of the exemplary embodiment of the present disclosure has degrees of freedom in at least two directions, and the directions of the degrees of freedom of the first adjustment mechanism 12 match the directions of the key tolerance factors in the structural tolerance of the first reflector 1. Similarly, the second adjustment mechanism 22 also has degrees of freedom in at least two directions that match the directions of the key tolerance factors in the structural tolerance of the second reflector 2; the third adjustment mechanism 32 also has degrees of freedom in at least two directions that match the directions of the key tolerance factors in the structural tolerance of the optical-mechanical module 3.

[0053] For example, the inventors found through optical theoretical analysis and bench tests that, with the light-emitting surface of the optomechanical module 3 as the reference XY plane, the length and width directions of the light-emitting surface of the optomechanical module 3 are the X-axis and the Y-axis respectively, and the direction perpendicular to the XY plane is the Z-axis, a spatial rectangular coordinate system is constructed. For the head-up display as a whole, the key tolerance factors mainly include the movement tolerance of the head-up display as a whole in the X-axis direction, the movement tolerance in the Y-axis direction, and the rotation tolerance in the Z-axis direction; for the first reflector 1, the key tolerance factors mainly include the movement tolerance of the first reflector 1 itself in the X-axis direction, the movement tolerance in the Y-axis direction, and the rotation tolerance in the Z-axis direction; for the second reflector 2, the key tolerance factors mainly include the movement tolerance of the second reflector 2 itself in the X-axis direction, the movement tolerance in the Y-axis direction, and the rotation tolerance in the Z-axis direction; for the optomechanical module 3, the key tolerance factors mainly include the movement tolerance of the light-emitting surface of the optomechanical module 3 in the X, Y, and Z directions and the rotation tolerance around the X, Y, and Z axes.

[0054] In view of the above-mentioned key tolerance factors, in an exemplary embodiment of the present disclosure, the first adjustment mechanism 12 may include a linear adjustment mechanism 5 and a rotational adjustment mechanism 6, or a combination of a plurality of linear adjustment mechanisms 5 and rotational adjustment mechanisms 6, wherein the linear adjustment mechanism 5 is used to make the mounting bracket move linearly relative to the support frame. Below, the first adjustment mechanism 12 is taken as an example for explanation, and the second adjustment mechanism 22 and the third adjustment mechanism 32 may refer to the first adjustment mechanism 12.

[0055] In an exemplary embodiment of the present disclosure, the first adjustment mechanism 12 includes a first linear adjustment mechanism 5, referring to Figure 2 and Figure 3 As shown, the first linear adjustment mechanism 5 includes a fixed plate 51, a movable plate 52, a guide rail 53 and a screw driving structure 54. The movable plate 52 is mounted on the fixed plate 51 through the guide rail 53, and the movable plate 52 has a positioning surface 521, which is located on the side of the movable plate 52 away from the fixed plate 51; the movable plate 52 is drivingly connected to the screw driving structure 54, so that when the rotary handle 541 of the screw driving structure 54 rotates, the screw of the screw driving structure 54 drives the movable plate 52 to slide on the fixed plate 51 in a direction parallel to the positioning surface 521.

[0056] Specifically, the positioning surface 521 may be provided with a plurality of standard mounting holes for mounting the first mounting bracket 13 or other adjustment mechanisms such as the second linear adjustment mechanism 5 or the rotation adjustment mechanism 6. In an exemplary embodiment of the present disclosure, a movable locking screw 55 is provided on the side of the movable plate 52. When the movable locking screw 55 is tightened, the movable locking screw 55 securely connects the fixed plate 51 with the movable plate 52 to fix the position of the movable plate 52 relative to the fixed plate 51. The screw driving structure 54 includes a rotary handle 541 and a screw. When the rotary handle 541 is turned, the screw moves in a direction parallel to the guide rail 53, thereby driving the movable plate 52 to slide on the fixed plate 51. Scale lines may be provided on the rotary handle 541 and the screw, respectively, for calculating the moving stroke of the movable plate 52 according to the pitch of the screw driving structure 54.

[0057] Exemplarily, the mounting bracket can be mounted on the positioning surface 521 of the moving plate 52, for example, the first mounting bracket 13 can be mounted on the positioning surface 521 of the moving plate 52 of the first linear adjustment mechanism 5. Alternatively, the rotation adjustment mechanism 6 is mounted on the positioning surface 521, and the first mounting bracket 13 can be mounted on the rotation adjustment mechanism 6. Alternatively, the second linear adjustment mechanism 5 is mounted on the positioning surface 521. For example, the first linear adjustment mechanism 5 includes a first fixed plate 51 and a first moving plate 52, and the second linear adjustment mechanism 5 includes a second fixed plate 51 and a second moving plate 52; wherein the positioning surface 521 of the first moving plate 52 and the surface of the second fixed plate 51 facing away from the second moving plate 52 are mutually attached and connected. The sliding directions of the first moving plate 52 and the second moving plate 52 are not parallel, so that the combination of the first linear adjustment mechanism 5 and the second linear adjustment mechanism 5 can enable the first mounting bracket 13 to have the freedom of movement in two directions in the plane. Exemplarily, the sliding directions of the first moving plate 52 and the second moving plate 52 can be perpendicular.

[0058] In another exemplary embodiment, other structures may also be provided between the first linear adjustment mechanism 5 and the second linear adjustment mechanism 5, that is, the positioning surface 521 of the first movable plate 52 and the surface of the second fixed plate 51 facing away from the second movable plate 52 are separated from each other, for example, a rotatable adjustment mechanism 6 is provided between the first linear adjustment mechanism 5 and the second linear adjustment mechanism 5.

[0059] In an exemplary embodiment of the present disclosure, the first adjustment mechanism 12 includes a rotation adjustment mechanism 6, referring to Figure 4As shown, the rotation adjustment mechanism 6 includes a fixed table 61 and a rotating table 62, and the fixed table 61 and the rotating table 62 are coaxially connected. In an exemplary embodiment of the present disclosure, a rotation locking screw is provided on the side of the rotating table 62. When the rotation locking screw is tightened, the rotation locking screw presses against the rotating table 62 so that the rotating table 62 cannot rotate around the axis, so as to fix the position of the rotating table 62 relative to the fixed table 61. The circumferential surfaces of the fixed table 61 and the rotating table 62 may be coplanar, and the side of the circumferential surface of the fixed table 61 close to the rotating table 62 and the side of the circumferential surface of the rotating table 62 close to the fixed table 61 may be respectively provided with scale lines for reading the angle through which the rotating table 62 has rotated relative to the fixed table 61. Exemplarily, a fine-tuning handle 63 may also be provided on the side of the fixed table 61 for driving the fixed table 61 to rotate around the axis. Reference Figure 4 As shown, when adjusting the position of the rotating table 62 relative to the fixed table 61, the rotating table 62 can be rotated in a free state for rough adjustment, and then the rotation locking screw can be tightened to fix the position of the rotating table 62, and the relative position of the fixed table 61 and the rotating table 62 can be finely adjusted by the fine adjustment knob 63. Exemplarily, a fine adjustment locking screw 64 is provided on the opposite side of the fine adjustment knob 63, and when the fine adjustment locking screw 64 is tightened, the fine adjustment locking screw 64 presses against the fixed table 61, so that the fixed table 61 cannot rotate around the axis.

[0060] In an exemplary embodiment of the present disclosure, reference Figure 1 As shown, the first adjustment mechanism 12 includes a first linear adjustment mechanism 5, a second linear adjustment mechanism 5 and a rotation adjustment mechanism 6, and the first linear adjustment mechanism 5, the second linear adjustment mechanism 5 and the rotation adjustment mechanism 6 are connected in sequence, the first fixed plate 51 of the first linear adjustment mechanism 5 is connected to the first support frame 11, the second fixed plate 51 of the second linear adjustment mechanism 5 is connected to the first positioning surface 521 of the first linear adjustment mechanism 5, the fixed platform 61 of the rotation adjustment mechanism 6 is connected to the second positioning surface 521 of the second linear adjustment mechanism 5, and the first mounting bracket 13 is mounted on the rotating platform 62 of the rotation adjustment mechanism 6. Among them, the first linear adjustment mechanism 5 can be connected to the first support frame 11 by screws, and the second fixed plate 51 of the second linear adjustment mechanism 5 is fastened to the first positioning surface 521 of the first linear adjustment mechanism 5 by screws. The fixed platform 61 of the rotation adjustment mechanism 6 and the second positioning surface 521 of the second linear adjustment mechanism 5 can also be fixed by screws.

[0061] In an exemplary embodiment of the present disclosure, reference Figure 1 As shown, similar to the first adjusting mechanism 12 , the second adjusting mechanism 22 and the third adjusting mechanism 32 also include a linear adjusting mechanism 5 and a rotational adjusting mechanism 6 .

[0062] Furthermore, the adjustment ranges of the first adjustment mechanism 12, the second adjustment mechanism 22 and the third adjustment mechanism 32 may be the same. In an exemplary embodiment of the present disclosure, since the tolerances of the first reflector 1, the second reflector 2 and the optical-mechanical module 3 are different from the external force impact and bump conditions that may be encountered during actual operation, and the structural stiffness of the first reflector 1, the second reflector 2 and the optical-mechanical module 3 are different, the adjustment ranges of the first adjustment mechanism 12, the second adjustment mechanism 22 and the third adjustment mechanism 32 are correspondingly different, and are adapted to the possible tolerance states of the first reflector 1, the second reflector 2 and the optical-mechanical module 3 when actually installed in the head-up display.

[0063] For example, for the first adjustment mechanism 12, the first linear adjustment mechanism 5 is used to drive the first reflector 1 to move bidirectionally along the X direction, and the second linear adjustment mechanism 5 is used to drive the first reflector 1 to move bidirectionally along the Y direction. The adjustment ranges of the first linear adjustment mechanism 5 and the second linear adjustment mechanism 5 can be the same, or they can be different according to the different tolerances of the first reflector 1 in the X direction and the Y direction. The rotation adjustment mechanism 6 can drive the first reflector 1 to rotate clockwise or counterclockwise around the Z axis. Exemplarily, the first linear adjustment mechanism 5 and the second linear adjustment mechanism 5 can respectively drive the first reflector 1 to move linearly along the X direction and the Y direction by plus or minus 5 mm, and the rotation adjustment mechanism 6 can drive the first reflector 1 to rotate plus or minus 3 degrees around the Z axis.

[0064] For the second adjustment mechanism 22, the first linear adjustment mechanism 5 is used to drive the second reflector 2 to move bidirectionally along the X direction, and the second linear adjustment mechanism 5 is used to drive the second reflector 2 to move bidirectionally along the Y direction. The adjustment ranges of the first linear adjustment mechanism 5 and the second linear adjustment mechanism 5 can be the same, or they can be different according to the tolerances of the second reflector 2 in the X direction and the Y direction. The rotation adjustment mechanism 6 can drive the second reflector 2 to rotate clockwise or counterclockwise around the Z axis. Exemplarily, the first linear adjustment mechanism 5 and the second linear adjustment mechanism 5 can respectively drive the second reflector 2 to move linearly along the X direction and the Y direction by plus or minus 2.5 mm, and the rotation adjustment mechanism 6 can drive the second reflector 2 to rotate around the Z axis by plus or minus 1.5 degrees.

[0065] For the third adjustment mechanism 32, the first linear adjustment mechanism 5 is used to drive the optical-mechanical module 3 to move bidirectionally along the X direction, and the second linear adjustment mechanism 5 is used to drive the optical-mechanical module 3 to move bidirectionally along the Y direction. The adjustment ranges of the first linear adjustment mechanism 5 and the second linear adjustment mechanism 5 can be the same, or they can be different according to the different tolerances of the optical-mechanical module 3 in the X direction and the Y direction. The rotation adjustment mechanism 6 can drive the optical-mechanical module 3 to rotate clockwise or counterclockwise around the Z axis. Exemplarily, the first linear adjustment mechanism 5 and the second linear adjustment mechanism 5 can respectively drive the optical-mechanical module 3 to move linearly along the X direction and the Y direction by plus or minus 3 mm, and the rotation adjustment mechanism 6 can drive the optical-mechanical module 3 to rotate around the Z axis by plus or minus 2 degrees.

[0066] refer to Figure 5 As shown, in an exemplary embodiment of the present disclosure, the first support frame 11, the second support frame 21 and the third support frame 31 have inclined surfaces at one end away from the base 4. Specifically, the first support frame 11 has a first inclined surface 111 at one end away from the base 4, the second support frame 21 has a second inclined surface 211 at one end away from the base 4, and the third support frame 31 has a third inclined surface 311 at one end away from the base 4. The angle α1 between the first inclined surface 111 and the base 4 is greater than 0° and less than 90°, the angle α2 between the second inclined surface 211 and the base 4 is greater than 0° and less than 90°, and the angle α3 between the third inclined surface 311 and the base 4 is greater than 0° and less than 90°.

[0067] Illustratively, the positioning surface 521 of the linear adjustment mechanism 5 is parallel to the surface of the fixed plate 51 facing away from the movable plate 52, the surface of the fixed table 61 of the rotary adjustment mechanism 6 facing away from the rotary table 62 is also parallel to the surface of the rotary table 62 facing away from the fixed table 61, and when the linear adjustment mechanism 5 and the rotary adjustment mechanism 6 are docked and installed, the rotating axis of the rotary adjustment mechanism 6 is perpendicular to the positioning surface 521 of the linear adjustment mechanism 5.

[0068] In an exemplary embodiment of the present disclosure, the first fixing plate 51 of the first linear adjustment mechanism 5 is mounted on the first inclined surface 111, so that the upper surface of the rotating table 62 of the first adjustment mechanism 12 is parallel to the first inclined surface 111; similarly, the upper surface of the rotating table 62 of the second adjustment mechanism 22 is parallel to the second inclined surface 211; the upper surface of the rotating table 62 of the third adjustment mechanism 32 is parallel to the third inclined surface 311. When constructing the test bench of the exemplary embodiment of the present disclosure, the initial position angles of the first mounting bracket 13, the second mounting bracket 23 and the third mounting bracket 33 can be determined by controlling the angles of the first inclined surface 111, the second inclined surface 211 and the third inclined surface 311 relative to the base 4. In some embodiments, the first reflector 1, the second reflector 2 and the optical-mechanical module 3 are fixedly mounted on the first mounting bracket 13, the second mounting bracket 23 and the third mounting bracket 33, respectively. Therefore, the initial position angles of the first reflector 1, the second reflector 2 and the optical-mechanical module 3 can be determined by controlling the angles of the first inclined surface 111, the second inclined surface 211 and the third inclined surface 311 relative to the base 4.

[0069] Exemplary, reference Figure 5 , the second support frame 21, the third support frame 31 and the first support frame 11 are sequentially arranged in a direction parallel to the base 4. The first inclined surface 111 is higher than the second inclined surface 211 in the height direction perpendicular to the base 4, and the first inclined surface 111 is higher than the third inclined surface 311 in the height direction perpendicular to the base 4. The angle α1 between the first inclined surface 111 and the base 4 is equal to the angle between the first reflector 1 and the reference installation plane of the head-up display in the standard eye box state; the angle α2 between the second inclined surface 211 and the base 4 is equal to the angle between the second reflector 2 and the reference installation plane of the head-up display in the standard eye box state; the angle α3 between the third inclined surface 311 and the base 4 is equal to the angle between the light-emitting surface of the optical-mechanical module 3 and the reference installation plane of the head-up display in the standard eye box state. That is, by controlling the included angles of the first inclined surface 111, the second inclined surface 211 and the third inclined surface 311 relative to the base 4, the initial position angles of the first reflector 1, the second reflector 2 and the optical-mechanical module 3 correspond to the standard eye box state of the head-up display, so that the process of adjusting the first adjustment mechanism 12, the second adjustment mechanism 22 and the third adjustment mechanism 32 directly corresponds to the tolerance in the standard eye box state of the head-up display.

[0070] refer to Figure 6As shown, in an exemplary embodiment of the present disclosure, the first mounting bracket 13 is a groove-type bracket, and the extending ends of the two leg surfaces of the first mounting bracket 13 are respectively provided with positioning blocks 131, and the positioning blocks 131 are used to abut against the side edges of the first reflector 1. The opposite sides of the extending ends of the two leg surfaces are respectively provided with mounting posts 132, and the first support assembly further includes a locking plate 14, which is rotatably connected to the mounting posts 132 in a one-to-one correspondence. The locking plate 14 is used to clamp the first reflector 1 between the locking plate 14 and the extending ends of the leg surfaces; the locking plate 14 has a notch 141, which is used to disengage the locking plate 14 from the first reflector 1 during the rotation of the locking plate 14 around the mounting posts 132.

[0071] Specifically, the first reflector 1 may be a plane mirror, a concave mirror, a convex mirror, or a free-form mirror. Figure 7 As shown, the two leg surfaces of the first mounting bracket 13 are respectively used to mount the two sides of the length direction of the first reflector 1. In an exemplary embodiment of the present disclosure, the first support assembly includes four locking plates 14. When the locking plates 14 are in a locked state, the first reflector 1 can be fixedly mounted on the first mounting bracket 13; when the locking plates 14 rotate around the mounting column 132 until the notch 141 is opposite to the fixed part of the first reflector 1, the first reflector 1 is disengaged from between the locking plates 14 and the first mounting bracket 13. For example, the angle of the locking plates 14 corresponding to the circumferential direction of the axis of the mounting column 132 is 70 degrees. When the locking plates 14 rotate 70 degrees around the mounting column 132, the notch 141 of the locking plates 14 rotates to be opposite to the fixed part of the first reflector 1, thereby releasing the first reflector 1.

[0072] In an exemplary embodiment of the present disclosure, reference Figure 8 As shown, the second mounting bracket 23 includes a bracket body 231 and a positioning plate 232. The bracket body 231 is connected to the second adjustment mechanism 22. The positioning plate 232 is arranged at one end of the bracket body 231 away from the second adjustment mechanism 22. The positioning plate 232 has an arc-shaped mounting surface on one side away from the bracket body 231. A reflector positioning hole 233 and a reflector supporting boss 234 are arranged on the arc-shaped mounting surface. The reflector positioning hole 233 is used to match with the reflector positioning pin located on the back side of the second reflector 2. The reflector supporting boss 234 is used to match with the positioning boss located on the back side of the second reflector 2.

[0073] Specifically, in an exemplary embodiment of the present disclosure, two reflector positioning pins are provided on the back side of the second reflector 2, i.e., the side opposite to the optical reflective surface of the second reflector 2, and three positioning bosses are also provided on the back side of the second reflector 2. Correspondingly, two reflector positioning holes 233 and three reflector support bosses 234 are provided on the arc-shaped mounting surface.

[0074] When the second reflector 2 is mounted on the second mounting bracket 23, the two reflector positioning pins of the second reflector 2 are respectively matched with the two reflector positioning holes 233, and the three positioning bosses of the second reflector 2 are respectively normally fitted with the three reflector support bosses 234 of the second mounting bracket 23. Since the positioning bosses and the reflector support bosses 234 have small areas, it is easy to control their surface contours, so that the assembly accuracy is higher. For example, the diameters of the two reflector positioning pins are both 3 mm, and the diameters of the two reflector positioning holes 233 are both 3.1 mm; the diameters of the positioning boss and the reflector supporting boss 234 are both 6 mm; for another example, the diameters of the two reflector positioning pins are both 3 mm, and a circular reflector positioning hole 233 with a diameter of 3.1 mm and a waist-shaped reflector positioning hole 233 with a width of 3.1 mm are provided on the arc-shaped mounting surface. When the second reflector 2 is mounted on the second mounting bracket 23, one reflector positioning pin of the second reflector 2 cooperates with the circular reflector positioning hole 233, and the other reflector positioning pin cooperates with the waist-shaped reflector positioning hole 233, so as to avoid the slight manufacturing and assembly error of the second reflector 2 or the positioning plate 232 affecting the installation of the second reflector 2 on the second mounting bracket 23. In another exemplary embodiment, the diameters and number of the reflector positioning pins on the back side of the second reflector 2 and the reflector positioning hole 233 on the arc-shaped mounting surface can be adjusted according to actual needs, and the diameters and number of the positioning boss and the reflector supporting boss 234 can also be adjusted according to actual needs.

[0075] In an exemplary embodiment of the present disclosure, reference Fig. 9 and Fig.10 As shown, the third mounting bracket 33 includes a base plate 331 and two columns 332 arranged on the base plate 331, the base plate 331 is connected to the third adjusting mechanism 32, the two columns 332 are spaced apart on the side of the base plate 331 away from the third adjusting mechanism 32 to form an installation space between the two columns 332; the column 332 has a positioning slope 333 on the side away from the base plate 331, and an optomechanical positioning pin 334 is provided on the positioning slope 333, and the optomechanical positioning pin 334 is used to match the housing positioning hole located on the housing of the optomechanical module 3, so that at least part of the optomechanical module 3 is installed within the installation space.

[0076] Specifically, for example, the base plate 331 is mounted on the upper surface of the rotating table 62 of the third adjustment mechanism 32, two housing positioning holes are respectively provided on both sides of the housing of the optical-mechanical module 3, and an optical-mechanical positioning pin 334 is respectively provided on the positioning inclined surfaces 333 of the two columns 332. When the optical-mechanical module 3 is mounted on the third mounting bracket 33, the two housing positioning holes of the housing of the optical-mechanical module 3 match the two optical-mechanical positioning pins 334 on the positioning inclined surfaces 333 to ensure the installation accuracy of the optical-mechanical module 3. For example, a circular housing positioning hole with a diameter of 3.1 mm and a waist-shaped housing positioning hole with a width of 3.1 mm are respectively provided on both sides of the housing of the optical-mechanical module 3. An optical-mechanical positioning pin 334 with a diameter of 3 mm is respectively provided on the positioning inclined surfaces 333 of the two columns 332.

[0077] In an exemplary embodiment of the present disclosure, the included angle β between the positioning inclined surface 333 and the base plate 331 is equal to the included angle α3 between the third inclined surface 311 and the base 4. Figure 1 As shown, the base plate 331 is mounted on the upper surface of the rotating table 62 of the third adjustment mechanism 32, and the positioning inclined surface 333 is inclined relative to the base plate 331, so that the angle β between the positioning inclined surface 333 and the base plate 331 and the angle α3 between the third inclined surface 311 and the base 4 compensate each other, so that the positioning inclined surface 333 can be parallel to the base 4 of the test bench. When the optical-mechanical module 3 is installed on the bottom shell of the head-up display, it is usually installed on the bottom of the bottom shell of the head-up display. By making the positioning inclined surface 333 parallel to the base 4, it is easy to make the angle of the light-emitting surface of the optical-mechanical module 3 on the bench correspond to the angle when the optical-mechanical module 3 is actually installed in the head-up display.

[0078] Those skilled in the art will readily appreciate other embodiments of the present disclosure after 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, which follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

[0079] 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 test bench for a head-up display, characterized in that: include: Base; A support assembly includes a support frame, an adjustment mechanism and a mounting bracket, wherein the support frame is fixed to the base, the adjustment mechanism is arranged between the support frame and the mounting bracket, and the adjustment mechanism is used to change the relative position relationship between the support frame and the mounting bracket; wherein the support assembly is arranged in multiple groups.

2. The test bench for the head-up display according to claim 1, characterized in that: The multiple groups of support assemblies include a first support assembly, a second support assembly and a third support assembly, wherein the first support assembly includes a first mounting bracket for mounting a first reflector of the head-up display; the second support assembly includes a second mounting bracket for mounting a second reflector of the head-up display; and the third support assembly includes a third mounting bracket for mounting an optical-mechanical module of the head-up display.

3. The test bench for the head-up display according to claim 1, characterized in that: One end of the support frame away from the base has an inclined surface, and an included angle α between the inclined surface and the base is greater than 0° and less than 90°.

4. The test bench for the head-up display according to claim 2, characterized in that: The first support assembly includes a first support frame, the second support assembly includes a second support frame, and the third support assembly includes a third support frame; the second support frame, the third support frame and the first support frame are arranged in sequence along a direction parallel to the base; The first support frame has a first inclined surface at one end away from the base, the second support frame has a second inclined surface at one end away from the base, and the third support frame has a third inclined surface at one end away from the base, wherein the first inclined surface is higher than the second inclined surface in the height direction perpendicular to the base, and the first inclined surface is higher than the third inclined surface in the height direction perpendicular to the base.

5. The test bench for the head-up display according to claim 4, characterized in that: The head-up display has a standard eye box state; The angle α1 between the first inclined surface and the base is equal to the angle between the first reflector and the reference mounting plane of the head-up display in the standard eye box state; the angle α2 between the second inclined surface and the base is equal to the angle between the second reflector and the reference mounting plane of the head-up display in the standard eye box state; the angle α3 between the third inclined surface and the base is equal to the angle between the light emitting surface of the optical-mechanical module and the reference mounting plane of the head-up display in the standard eye box state.

6. The test bench for the head-up display according to claim 4, characterized in that: The first support assembly includes a first adjustment mechanism, and the first adjustment mechanism is disposed between the first support frame and the first mounting bracket; The first mounting bracket is a groove-type bracket, and the extending ends of the two leg surfaces of the first mounting bracket are respectively provided with positioning blocks, and the positioning blocks are used to abut against the side edges of the first reflector; the opposite sides of the extending ends of the two leg surfaces are respectively provided with mounting columns, and the first support assembly also includes locking plates, and the locking plates are rotatably connected to the mounting columns in a one-to-one correspondence; Wherein, the locking plate is used to clamp the first reflector between the locking plate and the extended end of the leg surface; the locking plate has a notch, and the notch is used to disengage the locking plate from the first reflector during the rotation of the locking plate around the mounting column.

7. The head-up display test bench according to claim 4, characterized in that: The second support assembly includes a second adjustment mechanism, which is arranged between the second support frame and the second mounting bracket; the second mounting bracket includes a bracket body and a positioning plate, the bracket body is connected to the second adjustment mechanism, and the positioning plate is arranged at one end of the bracket body away from the second adjustment mechanism; Among them, the positioning plate has an arc-shaped mounting surface on one side away from the bracket body, and a reflector positioning hole and a reflector supporting boss are provided on the arc-shaped mounting surface. The reflector positioning hole is used to match the reflector positioning pin located on the back side of the second reflector, and the reflector supporting boss is used to match the positioning boss located on the back side of the second reflector.

8. The test bench for the head-up display according to claim 4, characterized in that: The third support assembly includes a third adjustment mechanism, and the third adjustment mechanism is arranged between the third support frame and the third mounting bracket; the third mounting bracket includes a base plate and two columns arranged on the base plate, the base plate is connected to the third adjustment mechanism, and the two columns are arranged at a distance from each other on a side of the base plate away from the third adjustment mechanism to form an installation space between the two columns; a positioning inclined surface is provided on a side of the column away from the base plate, and an optical mechanical positioning pin is provided on the positioning inclined surface, and the optical mechanical positioning pin is used to match the housing positioning hole located on the housing of the optical mechanical module, so that at least part of the optical mechanical module is installed in the installation space; The included angle β between the positioning inclined surface and the substrate is equal to the included angle α3 between the third inclined surface of the third support frame and the base.

9. The test bench for a head-up display according to any one of claims 1 to 8, characterized in that: The adjustment mechanism comprises a linear adjustment mechanism, and the linear adjustment mechanism comprises a fixed plate, a movable plate, a guide rail and a screw drive structure; Among them, the movable plate is installed on the fixed plate through the guide rail, and the movable plate has a positioning surface, and the positioning surface is located on the side of the movable plate away from the fixed plate; the movable plate is drivingly connected to the screw driving structure, so that when the handle of the screw driving structure rotates, the screw of the screw driving structure drives the movable plate to slide on the fixed plate in a direction parallel to the positioning surface.

10. The head-up display test bench according to claim 9, characterized in that: The adjustment mechanism includes a first linear adjustment mechanism and a second linear adjustment mechanism, the first linear adjustment mechanism includes a first fixed plate and a first movable plate, and the second linear adjustment mechanism includes a second fixed plate and a second movable plate; The positioning surface of the first movable plate and the surface of the second fixed plate facing away from the second movable plate are parallel to and connected to each other, and the sliding directions of the first movable plate and the second movable plate are perpendicular.

11. The test bench for a head-up display according to any one of claims 1 to 8, characterized in that: The adjustment mechanism comprises a rotation adjustment mechanism, and the rotation adjustment mechanism comprises a fixed platform and a rotating platform, and the fixed platform is coaxially rotatably connected with the rotating platform.

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