HUD ghosting simulation system and use method thereof

Abstract

The invention belongs to the technical field of vehicle-mounted HUD imaging quality. The invention provides an HUD ghosting simulation system and a use method thereof. According to the embodiment of the invention, the HUD optical module is used for generating the image source, and the image source is emitted to the windshield through the reflector assembly; performing ray tracing by using a data acquisition module to acquire a ray direction, a human eye position and a wedge-shaped angle of the wedge-shaped film; utilizing a data processing module to obtain a ghosting value according to the light direction, the human eye position and the wedge angle; sequentially changing the light-emitting point position, the human eye position and the wedge angle of the image source PGU, and repeatedly calculating ghosting values to obtain a plurality of groups of ghosting values; and analyzing the multiple groups of ghosting values to obtain the optimal wedge-shaped film. According to the method, the complex formula calculation process is avoided, and the problems that the ghosting calculation amount is increased and the calculation process is extremely complex in the face of large view field and multiple eye positions, so that complete analysis becomes very difficult are solved. The ghosting numerical values under various conditions can be rapidly analyzed, and the ghosting calculation accuracy, simplicity and speed are improved.

Description

Technical Field

[0001] The disclosed embodiments relate to the technical field of vehicle-mounted HUD imaging quality, and more particularly to a HUD ghosting simulation system and a method for using the same. Background Art

[0002] The car head-up display (HUD) can image driving information at a certain distance in front of the driver through an optical system. The augmented reality HUD can also integrate the information with the external scene, allowing the driver to read symbol information and observe the external scene at the same time in a head-up posture, eliminating the need to frequently switch between the instruments inside the cabin and the scenery outside the cabin, shortening the symbol interpretation reaction time and thus enhancing driving safety.

[0003] Existing head-up displays generally use calculations to calculate the ghosting angle. When faced with a large field of view and multiple eye positions, the amount of calculation will increase and the calculation process will be extremely complicated, making a complete analysis very difficult.

[0004] Therefore, it is necessary to improve one or more problems existing in the above-mentioned related technical solutions.

[0005] It should be noted that this section is intended to provide background or context for the technical solutions of the present disclosure stated in the claims. The description herein is not admitted to be prior art by virtue of being included in this section. Summary of the invention

[0006] The purpose of the embodiments of the present disclosure is to provide a HUD ghosting simulation system and a method of using the same, thereby overcoming one or more problems caused by the limitations and defects of the related art at least to a certain extent.

[0007] According to a first aspect of an embodiment of the present disclosure, a method for using a HUD ghosting simulation system is provided, the method comprising: An image source is generated by using a HUD optical module, and the image source is emitted onto a windshield through a reflector assembly for viewing by human eyes; Using a data acquisition module to perform ray tracing to obtain the direction of light, the position of the human eye, and the wedge angle of the wedge film; Using a data processing module to obtain a ghosting value according to the light direction, the eye position and the wedge angle; The light-emitting point position of the image source PGU, the position of the human eye and the wedge angle are sequentially changed, and the ghosting value is repeatedly calculated to obtain multiple sets of the ghosting values; A plurality of sets of said ghost values ​​are analyzed to obtain an optimal wedge-shaped film.

[0008] Furthermore, the method further comprises: Select m×n light-emitting points of the HUD optical module, select a×b eye positions, and select e wedge angles.

[0009] Furthermore, the step of obtaining the ghost value by using a data processing module according to the light direction, the eye position and the wedge angle includes: Selecting a set of the light direction, the eye position and the wedge angle; According to the light direction, a first direction vector V1 (L1, M1, N1) of the light G1 reflected from the inner surface of the windshield into the human eye and a second direction vector V2 (L2, M2, N2) of the light G2 reflected from the outer surface of the windshield into the human eye are obtained; A horizontal direction ghost Gh and a vertical direction ghost Gv are calculated according to the first direction vector V1 and the second direction vector V2.

[0010] Furthermore, the expression of the horizontal ghosting is:

[0011] The expression of the vertical ghosting is:

[0012] Among them, L1 is the coordinate of the first direction vector in the horizontal direction, M1 is the coordinate of the first direction vector in the transverse direction, N1 is the coordinate of the first direction vector in the longitudinal direction, L2 is the coordinate of the second direction vector in the horizontal direction, M2 is the coordinate of the second direction vector in the transverse direction, and N2 is the coordinate of the second direction vector in the longitudinal direction.

[0013] Furthermore, the step of sequentially changing the light-emitting point position of the image source PGU, the position of the human eye and the wedge angle, and repeatedly calculating the ghosting value to obtain multiple groups of the ghosting values ​​includes: sequentially changing the position of the light-emitting point of the image source PGU, the position of the human eye and the wedge angle; Traverse m×n light-emitting points of the HUD optical module, a×b eye positions, and e wedge angles to obtain m×n×a×b×e groups of ghost images.

[0014] Further, the step of analyzing a plurality of sets of ghost values ​​to obtain an optimal wedge-shaped film includes: Calculate the average value of m×n×a×b ghosts under each of the wedge angles, and select the wedge angle with the smallest ghost average value as the optimal wedge angle; The wedge-shaped film corresponding to the optimal wedge angle is the optimal wedge-shaped film.

[0015] According to a second aspect of an embodiment of the present disclosure, a HUD ghosting simulation system is provided, the system comprising: A windshield, comprising an inner layer of glass, an outer layer of glass and a wedge-shaped film, wherein the wedge-shaped film is arranged between the inner layer of glass and the outer layer of glass; The HUD optical module includes an image source PGU and a reflector assembly. The image source emitted by the image source PGU is reflected by the reflector assembly onto the windshield for viewing by human eyes. A data acquisition module, used for performing several ray tracings to acquire the direction of the light, the wedge angle of the wedge film and the position of the human eye; The data processing module is used to obtain multiple sets of ghosting values ​​according to multiple sets of light directions, wedge angles and human eye positions, and analyze the multiple sets of ghosting values ​​to obtain an optimal wedge film.

[0016] Furthermore, the wedge-shaped film includes a first surface and a second surface, and an angle between the first surface and the second surface constitutes the wedge angle.

[0017] Furthermore, the HUD optical module also includes: A dust cover is arranged between the reflector assembly and the windshield, and is used for shielding stray light and blocking dust.

[0018] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects: In the embodiments of the present disclosure, through the above-mentioned HUD ghosting simulation system and its use method, on the one hand, the HUD optical module is used to generate an image source, and the image source is emitted to the windshield through the reflector assembly for human eyes to watch; the data acquisition module is used to perform ray tracing to obtain the light direction, the human eye position and the wedge angle of the wedge film; the data processing module is used to obtain the ghosting value according to the light direction, the human eye position and the wedge angle; the image source PGU light point position, the human eye position and the wedge angle are changed in turn, and the ghosting value is repeatedly calculated to obtain multiple sets of ghosting values; multiple sets of ghosting values ​​are analyzed to obtain the optimal wedge film. On the other hand, the complex formula calculation process is avoided, and the problem that the amount of ghosting calculation will increase and the calculation process will be extremely complicated when facing a large field of view and multiple eye positions is solved, making complete analysis very difficult. It can quickly analyze the ghosting values ​​in various situations, improve the accuracy, simplicity and speed of ghosting calculation, and involve a larger eye position and field of view range. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1A step diagram showing a method for using a HUD ghosting simulation system in an exemplary embodiment of the present disclosure; Figure 2 A schematic diagram showing the structure and usage scenario of a HUD ghosting simulation system in an exemplary embodiment of the present disclosure is shown; Figure 3 A schematic diagram showing ray tracing in an exemplary embodiment of the present disclosure; Figure 4 The image showing the normal output ghost image changes with the wedge film in the exemplary embodiment of the present disclosure; Figure 5 A schematic structural diagram of a windshield in an exemplary embodiment of the present disclosure is shown.

[0021] In the figure, 1. image source PGU; 2. reflector assembly; 3. windshield; 31. outer glass; 32. inner glass; 33. first surface; 34. second surface; 4. human eye. DETAILED DESCRIPTION

[0022] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the disclosure will be more comprehensive and complete and to fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0023] In addition, the accompanying drawings are only schematic illustrations of the embodiments of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and their repeated descriptions will be omitted. Some of the block diagrams shown in the accompanying drawings are functional entities and do not necessarily correspond to physically or logically independent entities.

[0024] This example implementation provides a method for using a HUD ghosting simulation system. Figure 1 As shown in , the method for using the HUD ghosting simulation system may include: steps S101 to S104.

[0025] Step S101: using the HUD optical module to generate an image source, and transmitting the image source to the windshield through a reflector assembly for human eyes to see; Step S102: using a data acquisition module to perform ray tracing to obtain the direction of the light, the position of the human eye, and the wedge angle of the wedge film; Step S103: using a data processing module to obtain a ghosting value according to the light direction, the eye position and the wedge angle; Step S104: sequentially changing the light-emitting point position of the image source PGU, the position of the human eye and the wedge angle, and repeatedly calculating the ghosting value to obtain multiple sets of the ghosting values; Step S105: analyzing a plurality of sets of ghost values ​​to obtain an optimal wedge-shaped film.

[0026] Through the above HUD ghosting simulation system, on the one hand, the HUD optical module is used to generate an image source, and the image source is emitted to the windshield through the reflector assembly for human eyes to watch; the data acquisition module is used to perform ray tracing to obtain the light direction, the position of the human eye and the wedge angle of the wedge film; the data processing module is used to obtain the ghosting value according to the light direction, the position of the human eye and the wedge angle; the image source PGU light point position, the human eye position and the wedge angle are changed in turn, and the ghosting value is repeatedly calculated to obtain multiple sets of ghosting values; multiple sets of ghosting values ​​are analyzed to obtain the optimal wedge film. On the other hand, the complex formula calculation process is avoided, and the problem that the amount of ghosting calculation will increase and the calculation process will be extremely complicated when facing a large field of view and multiple eye positions is solved, making complete analysis very difficult. It can quickly analyze ghosting values ​​in various situations, improve the accuracy, simplicity and speed of ghosting calculation, and involve a larger eye position and field of view range.

[0027] Next, we will refer to Figures 1 to 4 Each step of the method for using the HUD ghosting simulation system in this example implementation is described in more detail.

[0028] In step S101, according to display requirements and installation restrictions, Figure 2 As shown, an optical system is designed, and a HUD optical module is installed under the vehicle instrument panel, so that driving image data can be obtained in real time and displayed on the vehicle windshield (3). An optical system is arranged inside the HUD optical module, and an image source PGU (1) is arranged inside the optical system and can magnify and display the image source. The vehicle is equipped with a vehicle control system. The image source can enter the human eye (4) through reflection of the system, and form a virtual image at a distance. In this embodiment, the image emitted by the image source PGU (1) enters the human eye (4) after three reflections from the reflector assembly (2) and the windshield (3), and forms a virtual image with a field of view angle of 13°×5° at a distance of 10m in front of the human eye (4). The image source PGU (1) needs to have a large enough area to support a large enough field of view. Specifically, the image source area is 30mm (length) × 20mm (width). According to the command, 5 (columns) × 5 (rows) points are selected, namely (x1, y1), (x2, y2) ... (x25, y25), as the positions of the light points when simulating ghosting.

[0029] A windshield (3) for reflecting light is constructed in an optical system. Specifically, the windshield (3) is divided into a three-layer structure, including an inner layer of glass (32), an outer layer of glass (31), and a wedge film, wherein the wedge film is arranged between the inner layer of glass (32) and the outer layer of glass (31). The inner layer of glass (32) and the outer layer of glass (31) are of equal thickness at all locations, and there is no wedge angle; the wedge film includes a first surface (33) and a second surface (34), and is a wedge-shaped laminated glass, wherein the thickness of the upper and lower sides is inconsistent, and the angle between the first surface (33) and the second surface (34) is a wedge angle θ.

[0030] The light rays reflected by the inner and outer surfaces of the windshield (3) and then entering the human eye (4) have different directions and angles, so the human eye (4) sees two virtual images that do not completely overlap.

[0031] In step S102, ray tracing is performed to allow the light emitted by the HUD image source PGU (1) to enter the human eye (4) after being reflected by the reflector assembly (2) and the windshield (3). Specifically, Figure 3 As shown, CodeV, Zemax, Tracepro and other software can be used for ray tracing. After selecting a suitable luminous angle, the light finally enters the human eye (4). In this embodiment, the luminous angle of the center point of the image source relative to the X-axis and the Y-axis is (15°, 30°).

[0032] In step S103, the direction vector of the light entering the human eye (4) after being reflected by the inner and outer surfaces of the windshield (3) is read, and the size of the ghost in the horizontal direction and the vertical direction is calculated. Specifically, the direction vector of the light G1 entering the human eye (4) after being reflected by the inner surface of the windshield (3) is V1 (L1, M1, N1), and the direction vector of the light G2 entering the human eye (4) after being reflected by the outer surface of the windshield (3) is V2 (L2, M2, N2). Based on V1 and V2, the horizontal ghost Gh and the vertical ghost Gv are calculated. The calculation process of FF0C is as follows: (1) (2) In this embodiment, the direction vector of L1 is V1 (0.0001, 0.002, 0.999998), and the direction vector of L2 is V2 (0, 0, 1). According to formulas (1) and (2), the horizontal ghosting Gh=0.34' and the vertical ghosting Gv=6.88' are calculated, thus obtaining the ghosting value size in a single case; In step S104, the variables such as the position of the PGU light-emitting point, the position of the human eye (4), and the angle of the wedge film of the windshield (3) are changed, and the ghost value is repeatedly calculated. Specifically, m×n light-emitting points (x1, y1), (x2, y2) ... (xm, yn) are selected on the image source PGU (1), a×b positions of the human eye (4) (A1, B1), (A2, B2) ... (Aa, Bb) are selected around the human eye (4), and e angles θ1, θ2 ... θe are selected for the wedge film. Therefore, a total of m×n×a×b×e groups of ghost images need to be simulated. In this embodiment, 5×5 light-emitting points are selected for the image source PGU (1), 3×3 positions of the human eye (4) are selected around the human eye (4), and 100 angles θ1, θ2 ... θ100 are selected for the wedge film. A total of 22,500 groups of ghost images need to be simulated. In step S105, a suitable wedge film angle of the windshield (3) is selected according to the calculated multiple sets of ghost values. Specifically, Figure 4 As shown, by calculating the average value of the ghost m×n×a×b at each wedge film angle, a wedge angle with the smallest ghost average value is selected as the recommended wedge angle. In this embodiment, when the wedge angle θ=0.255mrad, the ghost has the smallest average value.

[0033] In a specific embodiment, the data acquisition module may be simulation software, which uses the simulation software to simulate the refraction and reflection of light inside or on the surface of a medium, and transmits the data of the direction of light entering the human eye (4) to the computing system (i.e., the data processing module).

[0034] Furthermore, this example implementation also provides a HUD ghosting simulation system. Figure 2 As shown in , the HUD ghosting simulation system may include: a windshield (3), a HUD optical module, a data acquisition module (not shown) and a data processing module (not shown); wherein, A windshield (3), comprising an inner layer of glass (32), an outer layer of glass (31), and a wedge-shaped film, wherein the wedge-shaped film is arranged between the inner layer of glass (32) and the outer layer of glass (31); The HUD optical module comprises an image source PGU (1) and a reflector assembly (2), wherein an image source reflected by the image source PGU (1) is emitted onto a windshield (3) through the reflector assembly (2) for viewing by human eyes (4); A data acquisition module, used for performing a plurality of ray tracing operations to acquire the direction of the light, the wedge angle of the wedge film and the position of the human eye (4); A data processing module is used to obtain multiple sets of ghosting values ​​according to multiple sets of light directions, the wedge angles and the positions of the human eyes (4), and to analyze the multiple sets of ghosting values ​​to obtain an optimal wedge film.

[0035] In one embodiment, a windshield (3) for reflecting light is constructed in the optical system, specifically, Figure 5 As shown, the windshield (3) is divided into a three-layer structure, including an inner layer of glass (32), an outer layer of glass (31) and a wedge film, and the wedge film is arranged between the inner layer of glass (32) and the outer layer of glass (31). The inner layer of glass (32) and the outer layer of glass (31) are of equal thickness everywhere, and there is no wedge angle; the wedge film includes a first surface (33) and a second surface (34), and is a wedge-shaped laminated glass, and the thickness of the upper and lower sides is inconsistent, and the angle between the first surface (33) and the second surface (34) is a wedge angle θ.

[0036] In one embodiment, the system further comprises: a dust cover for shielding stray light and keeping away dust.

[0037] Through the above-mentioned HUD ghosting simulation system and its use method, on the one hand, the HUD optical module is used to generate an image source, and the image source is emitted to the windshield through the reflector assembly for human eyes to watch; the data acquisition module is used to perform ray tracing to obtain the light direction, the human eye position and the wedge angle of the wedge film; the data processing module is used to obtain the ghosting value according to the light direction, the human eye position and the wedge angle; the image source PGU light point position, the human eye position and the wedge angle are changed in turn, and the ghosting value is repeatedly calculated to obtain multiple sets of ghosting values; multiple sets of ghosting values ​​are analyzed to obtain the optimal wedge film. On the other hand, the complex formula calculation process is avoided, and the problem that the amount of ghosting calculation will increase and the calculation process will be extremely complicated when facing a large field of view and multiple eye positions is solved, making complete analysis very difficult. It can quickly analyze ghosting values ​​in various situations, improve the accuracy, simplicity and speed of ghosting calculation, and involve a larger eye position and field of view range.

[0038] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. in the above description indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present disclosure and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present disclosure.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0040] In the embodiments of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0041] In the embodiments of the present disclosure, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0042] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0043] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A method for using a HUD ghosting simulation system, characterized in that: The method includes: An image source is generated by using a HUD optical module, and the image source is emitted onto a windshield through a reflector assembly for viewing by human eyes; Using a data acquisition module to perform ray tracing to obtain the direction of light, the position of the human eye, and the wedge angle of the wedge film; Using a data processing module to obtain a ghosting value according to the light direction, the eye position and the wedge angle; The light-emitting point position of the image source PGU, the position of the human eye and the wedge angle are sequentially changed, and the ghosting value is repeatedly calculated to obtain multiple sets of the ghosting values; A plurality of sets of said ghost values ​​are analyzed to obtain an optimal wedge-shaped film.

2. The method for using the HUD ghosting simulation system according to claim 1, characterized in that: The method further includes: Select m×n light-emitting points of the HUD optical module, select a×b eye positions, and select e wedge angles.

3. The method for using the HUD ghosting simulation system according to claim 2, characterized in that: The step of obtaining the ghost value by using a data processing module according to the light direction, the eye position and the wedge angle includes: Selecting a set of the light direction, the eye position and the wedge angle; According to the light direction, a first direction vector V1 (L1, M1, N1) of the light G1 reflected from the inner surface of the windshield into the human eye and a second direction vector V2 (L2, M2, N2) of the light G2 reflected from the outer surface of the windshield into the human eye are obtained; A horizontal direction ghost Gh and a vertical direction ghost Gv are calculated according to the first direction vector V1 and the second direction vector V2.

4. The method for using the HUD ghosting simulation system according to claim 3, characterized in that: The expression of the horizontal ghosting is: The expression of the vertical ghosting is: Among them, L1 is the coordinate of the first direction vector in the horizontal direction, M1 is the coordinate of the first direction vector in the transverse direction, N1 is the coordinate of the first direction vector in the longitudinal direction, L2 is the coordinate of the second direction vector in the horizontal direction, M2 is the coordinate of the second direction vector in the transverse direction, and N2 is the coordinate of the second direction vector in the longitudinal direction.

5. The method for using the HUD ghosting simulation system according to claim 3, characterized in that: The step of sequentially changing the light-emitting point position of the image source PGU, the position of the human eye and the wedge angle, and repeatedly calculating the ghosting value to obtain multiple groups of the ghosting values ​​includes: sequentially changing the position of the light-emitting point of the image source PGU, the position of the human eye and the wedge angle; Traverse m×n light-emitting points of the HUD optical module, a×b eye positions, and e wedge angles to obtain m×n×a×b×e groups of ghost images.

6. The method for using the HUD ghosting simulation system according to claim 5, characterized in that: The step of analyzing a plurality of sets of ghost values ​​to obtain an optimal wedge-shaped film comprises: Calculate the average value of m×n×a×b ghosts under each of the wedge angles, and select the wedge angle with the smallest ghost average value as the optimal wedge angle; The wedge-shaped film corresponding to the optimal wedge angle is the optimal wedge-shaped film.

7. A HUD ghosting simulation system, characterized in that: The system includes: A windshield, comprising an inner layer of glass, an outer layer of glass and a wedge-shaped film, wherein the wedge-shaped film is arranged between the inner layer of glass and the outer layer of glass; The HUD optical module includes an image source PGU and a reflector assembly. The image source emitted by the image source PGU is reflected by the reflector assembly onto the windshield for viewing by human eyes. A data acquisition module, used for performing several ray tracings to acquire the direction of the light, the wedge angle of the wedge film and the position of the human eye; The data processing module is used to obtain multiple sets of ghosting values ​​according to multiple sets of light directions, wedge angles and human eye positions, and analyze the multiple sets of ghosting values ​​to obtain an optimal wedge film.

8. The HUD ghosting simulation system according to claim 7, characterized in that: The wedge-shaped film includes a first surface and a second surface, and an angle between the first surface and the second surface constitutes the wedge angle.

9. The HUD ghosting simulation system according to claim 7, characterized in that: The HUD optical module also includes: A dust cover is arranged between the reflector assembly and the windshield, and is used for shielding stray light and blocking dust.

Images