Head-up display image generation unit test device

Abstract

The application discloses a head-up display image generation unit test device, which comprises a first support, a second support and a test probe, the first support is used for fixing the image generation unit, the second support is arranged on one side of the first support along a first direction, an optical assembly is arranged on the second support, and the optical assembly comprises a diffusion sheet, and the test probe is arranged on a side of the second support away from the first support along the first direction, and is used for acquiring an imaging picture generated by the image generation unit and diffused through the diffusion sheet and acquiring a target parameter of the imaging picture. In the above manner, the head-up display image generation unit test device can directly test the performance of the image generation unit.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of automobiles, and particularly relates to a head-up display image generation unit testing device. BACKGROUND

[0002] At present, the head-up display system is increasingly applied to new energy vehicles on the market, helping drivers to obtain information more conveniently during driving. In the design of the head-up display, more and more automobile brands at home and abroad apply the form of AR-HUD (Augmented Reality Head Up Display), and the PGU (Programmable Graphics Unit) of the AR-HUD is the most important component in the entire device. If the image projection quality of the PGU is poor, the clarity of the picture of the entire device will be directly affected, and the user can clearly perceive that the quality of the picture is greatly reduced during use, resulting in poor user experience. In the actual driving environment, the display failure of the image will also affect the experience of the driver and the driving safety.

[0003] However, the performance of the PGU in the existing head-up display system is difficult to measure and verify on the entire device. SUMMARY

[0004] The application provides a head-up display image generation unit testing device, which can directly test the performance of the image generation unit.

[0005] To solve the above technical problems, one technical solution adopted by the application is to provide a head-up display image generation unit testing device, which comprises a first support, a second support and a testing probe. The first support is used to fix the image generation unit. The second support is arranged on one side of the first support along a first direction, and an optical assembly is arranged on the second support. The optical assembly comprises a diffusion sheet. The testing probe is arranged on the side of the second support away from the first support along the first direction, and is used to obtain an imaging picture generated by the image generation unit and diffused by the diffusion sheet and obtain a target parameter of the imaging picture.

[0006] Preferably, the testing device further comprises an angle adjusting device fixed with the first support or the second support. The angle adjusting device is used to adjust the included angle between the first support and the second support, so as to change the incident angle of the light generated by the image generation unit on the diffusion sheet.

[0007] Preferably, the angle adjusting device comprises a rotary slide and a swing slide arranged in a stack, the swing slide is used to drive the first support or the second support to rotate in a second direction, and the rotary slide is used to drive the first support or the second support to rotate in a third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0008] Preferably, the testing device further comprises a displacement adjusting device fixed with the first support or the second support, and the displacement adjusting device is used to adjust the relative displacement between the first support and the second support.

[0009] Preferably, the displacement adjusting device comprises a three-way slide used to drive the first support or the second support to move in the first direction, the second direction and the third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0010] Preferably, the diffuser is detachably connected with the second support, the second support is further provided with a diffuser pressing cover, the diffuser pressing cover is detachably connected with the second support, the diffuser pressing cover abuts against a side of the diffuser away from the second support, and the diffuser pressing cover is provided with an image plane defining window.

[0011] Preferably, the diffuser pressing cover comprises at least a first pressing cover and a second pressing cover, wherein the image plane defining window of the first pressing cover is provided on an entire surface, and the image plane defining window of the second pressing cover comprises nine light transmission holes arranged in an array; according to the needs of a testing item, the first pressing cover or the second pressing cover is selected to be installed on the second support and to press and fix the diffuser.

[0012] Preferably, the optical assembly further comprises a filter, the filter is selected to be installed or detached from the second support according to the needs of a testing item; when the filter is installed on the second support, the filter is arranged opposite to the diffuser, and the filter is located on a side of the second support away from the image generating unit.

[0013] Preferably, the optical assembly further comprises a filter pressing cover, the filter pressing cover is selected to be installed or detached from the second support according to the needs of a testing item; when the filter is installed on the second support, the filter pressing cover is also installed on the second support, and the filter pressing cover abuts against a side of the filter away from the second support.

[0014] Preferably, the testing device further comprises a third support and a height adjusting device, the third support is arranged on the side of the second support away from the first support along the first direction, and the testing probe is fixed on the third support; the height adjusting device is fixed with the third support and is used for adjusting the height of the testing probe.

[0015] Compared with the prior art, the application has the following beneficial effects: the testing device provided by the application comprises a first support, a second support, a diffusion sheet and a testing probe, the first support is used for mounting an image generating unit to be tested, image light generated by the image generating unit first passes through the diffusion sheet on the second support, the image light that has been diffused and homogenized by the diffusion sheet is acquired by the testing probe, the testing probe can shoot an imaging picture, which facilitates subsequent measurement of parameters (such as length, width and other dimensions) of the imaging picture, and the testing probe can also directly detect target parameters such as chroma value or illuminance value of the imaging picture. The testing device of the application can directly perform high-precision testing on the image generating unit in the head-up display, which helps to improve the display quality of the head-up display. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings, wherein:

[0017] Figure 1 is a structural schematic diagram of an embodiment of the head-up display image generating unit testing device of the application;

[0018] Figure 2 is a structural schematic diagram of an embodiment of the second support and the angle adjusting device;

[0019] Figure 3 is a side view schematic diagram of an embodiment of the second support and the optical assembly of the application;

[0020] Figure 4 is a side view schematic diagram of another embodiment of the second support and the optical assembly of the application. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings of the embodiments of the application. Obviously, the described embodiments are only some of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the application.

[0022] Referring to Figure 1 , Figure 1 is a structural schematic diagram of an embodiment of a head-up display image generation unit test device of the present application, the head-up display image generation unit test device 100 comprising a first support 10, a second support 20 and a test probe 30. Optionally, the test device 100 can further comprise an optical vibration isolation platform 40, which isolates the vibration source from the ground, thereby reducing the impact of vibration on the device or the environment.

[0023] The first support 10 is detachably mounted on the optical vibration isolation platform 40 and is used to fix the image generation unit 200, which can be mounted or detached from the first support 10, facilitating replacement of the image generation unit 200 to be tested. The second support 20 is detachably mounted on the optical vibration isolation platform 40 and is arranged along the first direction Y on one side of the first support 10. The second support 20 is provided with an optical assembly 50, and is used to fix the optical assembly 50 so that the optical assembly 50 is aligned with the image generation unit 200. The optical assembly 50 can be mounted or detached from the second support 20, and the optical assembly 50 adapted to the second support 20 can be replaced according to the type of test project. The optical assembly 50 comprises a diffusion sheet 51, which is a component in the head-up display and is located behind the image generation unit 200. The diffusion sheet 51 is used to diffuse and homogenize the image light generated by the image generation unit 200, ensuring that the image light generated by the image generation unit 200 has appropriate distribution and uniformity before being projected onto the front windshield. The test probe 30 is detachably mounted on the optical vibration isolation platform 40 and is arranged along the first direction Y on the side of the second support 20 away from the first support 10, i.e., in the first direction Y, the first support 10, the second support 20 and the test probe 30 are arranged in sequence. The test probe 30 is used to acquire the imaging picture generated by the image generation unit 200 and diffused by the diffusion sheet 51 and to acquire the target parameters of the imaging picture. Specifically, the target parameters can be chrominance values or luminance values, etc.

[0024] The test device 100 of the present application comprises the first support 10, the second support 20, the diffusion sheet 51 and the test probe 30. The first support 10 is used to mount the image generation unit 200 to be tested. The image light generated by the image generation unit 200 first passes through the diffusion sheet 51 on the second support 20. The image light that has been diffused and homogenized by the diffusion sheet 51 is acquired by the test probe 30. The test probe 30 can shoot the imaging picture, facilitating subsequent measurement of the parameters (such as length, width, etc.) of the imaging picture. The test probe 30 can also directly detect the target parameters such as chrominance values or luminance values of the imaging picture. The test device 100 of the present application can directly perform high-precision testing on the image generation unit 200 in the head-up display, which helps to improve the display quality of the head-up display.

[0025] Optionally, the testing device 100 further comprises an angle adjusting device 60 fixed with the first support 10 or the second support 20, the angle adjusting device 60 being used to adjust the included angle between the first support 10 and the second support 20, so as to change the incident angle of the light generated by the image generating unit 200 on the diffusion sheet 51. In the embodiment, the angle adjusting device 60 is detachably connected on the optical vibration isolation platform 40, and the second support 20 is detachably connected on the angle adjusting device 60. Since the surface of the diffusion sheet 51 usually has micro-patterns extending along the second direction X and the third direction Z, in order to reduce the influence of the micro-patterns on the testing accuracy, the present application provides the angle adjusting device 60, which is used to adjust the angle of the second support 20, so as to drive the diffusion sheet 51 to rotate by a certain angle, change the incident angle of the image light generated by the image generating unit 200 on the surface of the diffusion sheet 51, and test whether the target parameter changes at each angle, so as to improve the testing accuracy. Specifically, as shown in Figure 2 Figure 2 is a structural schematic view of an embodiment of the second support and the angle adjusting device. The angle adjusting device 60 comprises a swing sliding table 61, the swing sliding table 61 comprising a first base 612 and a swing platform 611, the swing platform 611 being rotationally arranged on the first base 612 with the second direction X as the axis, and the first base 612 being provided with a first adjusting knob 613, the swing platform 611 being driven to rotate along the arrow direction by rotating the first adjusting knob 613, so as to drive the second support 20 and the diffusion sheet 51 thereon to rotate, and realize the adjustment of the pitch angle.

[0026] Further, referring to Figure 1 In some embodiments, the angle adjusting device 60 further comprises a rotating sliding table 62, the rotating sliding table 62 comprising a second base 622 and a rotating platform 621, the rotating platform 621 being rotationally arranged on the second base 622 with the third direction Z (i.e. the vertical direction) as the axis, and the second base 622 being provided with a second adjusting knob 623, the rotating platform 621 being driven to rotate by rotating the second adjusting knob 623, so as to drive the second support 20 and the diffusion sheet 51 thereon to rotate, and realize the adjustment of the angle in the horizontal direction.

[0027] Specifically, as shown in Figure 1 ​As shown, the angle adjusting device 60 comprises a rotating slide 62 and a swing slide 61 which are stacked, wherein the second support 20 is detachably mounted on a rotating platform 621 of the rotating slide 62, a second base 622 of the rotating slide 62 is detachably mounted on the swing slide 61, and a first base 612 of the swing slide 61 is detachably mounted on the optical vibration isolation platform 40. Rotating the first adjusting knob 613 can simultaneously drive the swing platform 611, the rotating slide 62, the second support 20 and the diffuser plate 51 to rotate around the second direction X as the axis, and rotating the second adjusting knob 623 can simultaneously drive the rotating platform 621, the second support 20 and the diffuser plate 51 to rotate around the third direction Z as the axis. Therefore, by adjusting the first adjusting knob 613 and the second adjusting knob 623 respectively, the pitch angle and the horizontal angle of the second support 20 and the diffuser plate 51 thereon can be adjusted simultaneously, the target parameters at different angles can be tested, and the testing accuracy can be improved.

[0028] In other embodiments, the positions of the rotating slide 62 and the swing slide 61 can be exchanged, that is, the second support 20 is detachably mounted on the swing platform 611 of the swing slide 61, the first base 612 of the swing slide 61 is detachably mounted on the rotating slide 62, and the second base 622 of the rotating slide 62 is detachably mounted on the optical vibration isolation platform 40. Rotating the second adjusting knob 623 can simultaneously drive the rotating platform 621, the swing slide 61, the second support 20 and the diffuser plate 51 to rotate around the third direction Z as the axis, and rotating the first adjusting knob 613 can simultaneously drive the swing platform 611, the second support 20 and the diffuser plate 51 to rotate around the second direction X as the axis. Therefore, by adjusting the first adjusting knob 613 and the second adjusting knob 623 respectively, the pitch angle and the horizontal angle of the second support 20 and the diffuser plate 51 thereon can be adjusted simultaneously, the target parameters at different angles can be tested, and the testing accuracy can be improved.

[0029] In other embodiments, the angle adjusting device 60 can also only comprise the rotating slide 62 to realize the adjustment of the horizontal angle.

[0030] In other embodiments, the angle adjusting device 60 can also be fixed with the first support 10, and the incident angle of the image light generated by the image generating unit 200 to the diffuser plate 51 can be realized by adjusting the rotating angle of the first support 10 and the image generating unit 200 thereon. Specifically, the angle adjusting device 60 can be a separately arranged rotating slide 62 or swing slide 61, or a stacked rotating slide 62 and swing slide 61. In other embodiments, the rotating slide 62 and the swing slide 61 can be fixedly connected with the first support 10 and the second support 20 respectively.

[0031] Optionally, the testing device 100 further comprises a displacement adjusting device 70 fixed with the first support 10 or the second support 20, and used for adjusting the relative displacement between the first support 10 and the second support 20. In the embodiment, the displacement adjusting device 70 is detachably connected to the optical vibration isolation platform 40, and the first support 10 is detachably connected to the displacement adjusting device 70. The displacement adjusting device 70 is used for adjusting the displacement of the first support 10, so as to drive the image generating unit 200 to translate, change the coordinates of the image generating unit 200, and facilitate the alignment of the outgoing light with the diffusion sheet 51. Specifically, continuing to refer to Figure 1 , the displacement adjusting device 70 is detachably connected to the optical vibration isolation platform 40, and the displacement adjusting device 70 comprises a three-way slide 71, the three-way slide 71 comprises a third base 711, a first slide 712, a second slide 713 and a vertical slide 714 which are stacked, the third base 711 is fixed to the optical vibration isolation platform 40, the first support 10 is detachably mounted on the vertical slide 714, and the first slide 712, the second slide 713 and the vertical slide 714 are respectively used for driving the first support 10 to move along the first direction Y, the second direction X and the third direction Z, so as to realize the adjustment of the distance between the image generating unit 200 and the diffusion sheet 51, the front and back positions of the image generating unit 200 and the height of the image generating unit 200.

[0032] In other embodiments, the displacement adjusting device 70 can also comprise only one or two of the first slide 712, the second slide 713 and the vertical slide 714, so as to realize the adjustment of the displacement in one or two of the first direction Y, the second direction X and the third direction Z.

[0033] In other embodiments, the displacement adjusting device 70 can also be fixed with the second support 20, and the relative position between the image generating unit 200 and the diffusion sheet 51 can be changed by adjusting the displacement of the second support 20 and the diffusion sheet 51 on the second support 20. The first slide 712, the second slide 713 and the vertical slide 714 can also be provided in a split manner, and are respectively arranged below the first support 10 and the second support 20.

[0034] Optionally, the testing device 100 further includes a third bracket 80 and a height adjustment device 90. The third bracket 80 is disposed along the first direction Y on a side of the second bracket 20 facing away from the first bracket 10. The test probe 30 is secured to the third bracket 80. The height adjustment device 90 is secured to the third bracket 80 and is used to adjust the height of the test probe 30. Specifically, the height adjustment device 90 is detachably mounted on the optical vibration isolation platform 40. The third bracket 80 is detachably mounted on the height adjustment device 90. The height adjustment device 90 includes a fourth base 92 and a lifting platform 91. The fourth base 92 is provided with a third adjustment knob 93. Rotating the third adjustment knob 93 adjusts the relative position of the lifting platform 91 and the fourth base 92 in the height direction (i.e., the third direction Z), thereby adjusting the height of the third bracket 80 and the test probe 30, thereby facilitating alignment of the probe with the optical assembly 50 on the second bracket 20. The third bracket 80 includes a base in the shape of a Chinese character "J" (J). The base is formed with a mounting slot that engages with the test probe 30, facilitating positioning of the test probe 30.

[0035] Optionally, see Figure 2 and Figure 3 , Figure 3 FIG2 is a side view schematic diagram of an embodiment of a second bracket and optical assembly of the present application. A diffuser 51 is detachably connected to the second bracket 20. The second bracket 20 is also provided with a diffuser cover 52, which is detachably connected to the second bracket 20. The diffuser cover 52 abuts against the side of the diffuser 51 facing away from the second bracket 20. The diffuser cover 52 is provided with an image plane defining window 522. Specifically, a first groove 21 is provided on one side of the second bracket 20. The first groove 21 is used to accommodate the diffuser 51 and facilitate positioning of the diffuser 51 on the second bracket 20. A boss 521 is provided on one side of the diffuser cover 52 that is adapted to fit within the first groove 21. When the diffuser cover 52 abuts against the diffuser 51, at least a portion of the boss 521 is inserted into the first groove 21, that is, the boss 521 abuts the diffuser 51 within the first groove 21. The boss 521 cooperates with the first groove 21 to position the diffuser cover 52 and the diffuser 51, ensuring test accuracy. The diffusion plate cover 52 can be fastened to one side of the second bracket 20 by bolts, which is convenient for replacement and installation.

[0036] Optionally, the diffusion plate cover 52 comprises at least a first cover 52a and a second cover 52b, wherein the image plane defining window 522 of the first cover 52a is a full surface, and the image plane defining window 522 of the second cover 52b comprises nine light transmission holes arranged in a 3x3 matrix; according to the testing item, the first cover 52a or the second cover 52b is selected to be installed on the second support 20 and pressed against the fixed diffusion plate 51. Specifically, the testing items of the image generation unit 200 are various, including white balance test and image plane parameter measurement, etc., for example, in the image plane parameter measurement, it includes testing items such as center illuminance value, projection distance, TV distortion, MTF (Modulation Transfer Function curve), illuminance uniformity value, illuminance contrast, image plane size, picture eccentricity, etc. The image plane size and shape required by different testing items are different, wherein the measurement of the illuminance uniformity value requires the measurement of the illuminance of the nine points arranged in an array, so in the testing item of the illuminance uniformity value, the second cover 52b needs to be replaced. As shown in Figure 4 Figure 4 is a side view schematic diagram of another embodiment of the second support and optical assembly of the present application. The second cover 52b is provided with nine light transmission holes arranged in a 3x3 matrix. The measurement of the remaining items only requires a complete picture, so the first cover 52a needs to be replaced for testing. The first cover 52a is provided with an image plane defining window 522 which can be a rectangular window, and the size and proportion of the window can be set according to actual testing needs, for example, the length-width proportion of the window can be 16:9 or 4:3, etc.

[0037] Specifically, the illuminance uniformity value test process is as follows: according to the design parameters of each image generation unit 200, first fix the image generation unit 200 on the first support 10, set the diffusion plate 51 on the second support 20, then fix the second cover 52b on the second support 20 to fix the diffusion plate 51, fix the test probe 30 on the third support 80, adjust the position of the first support 10 and the height of the third support 80 according to the given projection distance, and ensure that the picture definition is within the standard range, project a white picture, and the imaging picture of the light after passing through the second cover 52b and the diffusion plate 51 is a 3x3 matrix of nine light points, and the test probe 30 detects the illuminance value E of the nine light points respectively, and the ratio of the minimum illuminance value Emin to the maximum illuminance value Emax is taken as the illuminance uniformity. The chrominance value test can be carried out at different angles by rotating the first adjusting knob 613 and the second adjusting knob 623. Specifically, the test can be carried out within ±10°, for example, the test can be carried out at angles of +3°, +6° and +7° by rotating around the Z axis (i.e. rotating around the third direction Z) and rotating around the X axis (i.e. rotating around the second direction X) respectively to obtain the illuminance uniformity at each angle.

[0038] ​It should be noted that in some test items, such as TV distortion or image size, the size of the diffuser 51 used for testing is different from other test items, and in these test items, other sizes of the second bracket 20 or the first cover 52a can be used, which has a first groove 21 and a boss 521 of different sizes, facilitating the fixation of diffusers 51 of different sizes. Since the second bracket 20 is detachably mounted, the flexible switching between different test items can be realized by only replacing the second bracket 20 or the first cover 52a.

[0039] Optionally, continuing to refer to Figure 2 The optical assembly 50 further comprises a filter 53, which is selectively mounted or detached from the second bracket 20 according to the test item. When the filter 53 is mounted on the second bracket 20, the filter 53 is arranged opposite to the diffuser 51, and the filter 53 is located on the side of the second bracket 20 away from the image generation unit 200. Specifically, when the image generation unit 200 performs white balance testing, in order to normally restore the optical color of the image generation unit 200, the color deviation needs to be corrected by the filter 53, so that the light needs to pass through the filter 53 again after passing through the diffuser 51. Specifically, in order to facilitate the installation of the filter 53, a second groove 22 is arranged on one side of the second bracket 20, and the second groove 22 and the first groove 21 are arranged on opposite sides of the second bracket 20, respectively. The second groove 22 is adapted to the size of the filter 53, so that the filter 53 can be accommodated in the second groove 22. Specifically, the second groove 22 can be a circular groove.

[0040] Further, the optical assembly 50 further comprises a filter cover 54, which is selectively mounted or detached from the second bracket 20 according to the test item. When the filter 53 is mounted on the second bracket 20, the filter cover 54 is also mounted on the second bracket 20, and the filter cover 54 abuts against the side of the filter 53 away from the second bracket 20. Specifically, when the image generation unit 200 performs white balance testing, the filter 53 is first mounted on the second bracket 20, and then the filter 53 is abutted on the other side of the second bracket 20 by the filter cover 54. In order to let the light pass through the filter 53, a window can be arranged on the filter cover 54, which covers the filter 53. The filter cover 54 can be locked on the other side of the second bracket 20 by bolts, facilitating replacement and installation.

[0041] Specifically, the white balance test process is as follows: according to the design parameters of each image generation unit 200, first, the image generation unit 200 is fixed on the first support 10, the diffusion sheet 51 and the filter 53 are respectively arranged on both sides of the second support 20, then the first gland 52a and the filter gland 54 are respectively fixed on both sides of the second support 20, the test probe 30 is fixed on the third support 80, the position of the first support 10 and the height of the third support 80 are adjusted according to the given projection distance, the picture clarity is ensured within the standard range, and the white picture is projected, at this time the test probe 30 can detect the chroma value of the picture, the curve graph of the brightness change with the PWM is obtained by continuous scanning at different temperatures, and the final purpose needs to ensure that the curve is smooth and continuous. The chroma value can be tested at different angles by rotating the first adjusting knob 613 and the second adjusting knob 623. Specifically, the test can be performed within ±10°, for example, the test can be performed at angles of +3°, +6° and +7° around the Z axis (i.e., rotating around the third direction Z as the axis) and around the X axis (i.e., rotating around the second direction X as the axis), respectively.

[0042] The above is only an embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings of the present application, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A head-up display image generation unit testing device, characterized in that: include: A first bracket, used for fixing the image generating unit; A second bracket is arranged on one side of the first bracket along the first direction, and an optical component is arranged on the second bracket, and the optical component includes a diffuser; a test probe, disposed along the first direction on a side of the second bracket facing away from the first bracket, for acquiring an imaging picture generated by the image generation unit and diffused by the diffusion sheet and acquiring target parameters of the imaging picture; an angle adjustment device fixed to the first bracket or the second bracket, the angle adjustment device being used to adjust the angle between the first bracket and the second bracket to change the incident angle of the light generated by the image generation unit on the diffuser; A displacement adjustment device is fixed to the first bracket or the second bracket, and the displacement adjustment device is used to adjust the relative displacement between the first bracket and the second bracket.

2. The head-up display image generation unit testing device according to claim 1, characterized in that: The angle adjustment device includes a rotating slide and a swinging slide arranged in a stacked manner, the swinging slide is used to drive the first bracket or the second bracket to rotate along the second direction, and the rotating slide is used to drive the first bracket or the second bracket to rotate along the third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other.

3. The head-up display image generation unit testing device according to claim 1, characterized in that: The displacement adjustment device includes a three-way slide, which is used to drive the first bracket or the second bracket to move along the first direction, the second direction and the third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other.

4. The head-up display image generation unit testing device according to claim 1, characterized in that: The diffuser is detachably connected to the second bracket, and a diffuser cover is provided on the second bracket. The diffuser cover is detachably connected to the second bracket, and the diffuser cover presses against the side of the diffuser facing away from the second bracket. An image plane limiting window is provided on the diffuser cover.

5. The head-up display image generation unit testing device according to claim 4, characterized in that: The diffusion sheet pressure cover comprises at least a first pressure cover and a second pressure cover, wherein the image plane defining window of the first pressure cover is provided on the entire surface, and the image plane defining window of the second pressure cover comprises nine light-transmitting holes arranged in an array; According to the requirements of the test items, the first pressure cover or the second pressure cover is selected to be installed on the second bracket and press and fix the diffusion sheet.

6. The head-up display image generation unit testing device according to claim 4, characterized in that: The optical assembly further includes a filter, which is selectively installed or removed from the second bracket according to the test item requirements; When the optical filter is mounted on the second bracket, the optical filter is arranged opposite to the diffusion plate, and the optical filter is located on a side of the second bracket away from the image generating unit.

7. The head-up display image generation unit testing device according to claim 6, characterized in that: The optical assembly further includes a filter cover, which can be installed or removed from the second bracket according to the test item requirements; When the optical filter is mounted on the second bracket, the optical filter cover is also mounted on the second bracket, and the optical filter cover abuts against a side of the optical filter away from the second bracket.

8. The head-up display image generation unit testing device according to claim 1, characterized in that: The testing equipment further comprises: a third bracket, arranged along the first direction on a side of the second bracket facing away from the first bracket, the test probe being fixed on the third bracket; A height adjustment device is fixed to the third bracket and is used to adjust the height of the test probe.

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