An envelope and HUD component

Abstract

This invention provides an envelope cover and HUD component. A first mounting portion has a first sidewall; a second mounting portion is disposed opposite to the first mounting portion along a first direction, forming a first mounting opening and a second mounting opening; a second reflector is directly opposite to the first reflector in the direction of reflected light path; the second mounting portion has a second sidewall, which is disposed opposite to the first sidewall; a bottom wall is connected to the first and second sidewalls, and the bottom wall is recessed to form a concave portion; at least a portion of the first sidewall, second sidewall, and bottom wall has a first stepped surface; at least a portion of the sidewall of the concave portion has a second stepped surface; the first stepped surface forms an acute angle with the direction of reflected light path and extends in a direction less than or equal to 120° from the direction of reflected light path; the second stepped surface forms an acute angle with the direction of incident light path and extends in a direction less than or equal to 120° from the direction of incident light path. This invention reduces glare without increasing cost or sacrificing environmental performance.

Description

Technical Field

[0001] This utility model relates to the field of automotive head-up display technology, and in particular to an envelope cover and HUD component. Background Technology

[0002] A HUD (Head-Up Display) projects vehicle information (such as speed and navigation) onto the windshield in front of the driver, allowing them to access information without looking down, significantly improving driving safety and convenience. However, in the optical path of a HUD system, light inevitably shines onto the surfaces of surrounding components, such as the lens hood. The reflection of light from these surfaces creates stray light, particularly noticeable bright spots or halos around the virtual image of the HUD, severely interfering with the driver's clear observation of the image and even causing glare, thus affecting driving safety.

[0003] To solve this problem, the following solutions are commonly used in existing technologies:

[0004] Post-processing measures: Painting, attaching felt, or flocking are applied to the optical envelope surface of the HUD components. These solutions can achieve good or even excellent anti-reflective effects, but their disadvantages are also very obvious: they add extra manufacturing steps, leading to a significant increase in costs; at the same time, painting and adhesives may cause volatile organic compound odor problems, which do not meet increasingly stringent environmental protection requirements; the manufacturing process may also generate environmental pollution.

[0005] Surface texturing: By adding a deeper texture to the surface of the part mold, a rough, diffuse reflective surface is created on the injection-molded part to reduce reflectivity. This solution has significant advantages in terms of cost, environmental friendliness, and odor. However, its anti-reflective effect is limited; under strong light, visible reflections still occur, failing to meet the high contrast and clarity requirements of high-end HUD systems.

[0006] Therefore, there is an urgent need in this field for a new technical solution that can achieve anti-reflective effects comparable to post-processing techniques such as spray painting, while also possessing the advantages of low cost, odorless, and environmentally friendly surface texture treatment. Utility Model Content

[0007] The purpose of this invention is to solve the glare problem of HUD components. This invention provides an envelope and HUD components that reduce glare without increasing cost or sacrificing environmental performance.

[0008] To solve the above-mentioned technical problems, an embodiment of this utility model discloses an envelope, comprising:

[0009] The first mounting part has a first sidewall;

[0010] The second mounting part is disposed opposite to the first mounting part along a first direction and forms a first mounting port and a second mounting port. The first mounting port is used to mount the first reflector, and the second mounting port is used to mount the second reflector. The second reflector is directly opposite to the first reflector in the direction of reflected light path. The second mounting part has a second sidewall, which is disposed opposite to the first sidewall along the first direction.

[0011] A bottom wall, connected to the first side wall and the second side wall, is recessed to form a recess for mounting an image generation unit. The image generation unit is directly opposite the first reflector in the incident light path direction.

[0012] The first sidewall, the second sidewall, and the bottom wall are at least partially provided with a first stepped surface, and the sidewall of the recess is at least partially provided with a second stepped surface. The first stepped surface forms an acute angle with the direction of the reflected light path and extends in a direction less than or equal to 120° with the direction of the reflected light path. The second stepped surface forms an acute angle with the direction of the incident light path and extends in a direction less than or equal to 120° with the direction of the incident light path.

[0013] By employing the above technical solution, with at least a portion of the first sidewall, second sidewall, and bottom wall having a first stepped surface at an acute angle to the direction of the reflected light path, and at least a portion of the sidewall of the recess having a second stepped surface at an acute angle to the direction of the incident light path, stray light that might enter the main light path can be reflected to an area that will not interfere with imaging or dissipated through multiple reflections. This stepped structure is more proactive and efficient than a simple light-absorbing coating, especially when dealing with large-angle incident light.

[0014] According to another specific embodiment of the present invention, an envelope is disclosed, wherein the extension direction of the first stepped surface is at 60°-120° with the direction of the reflected light path, and the extension direction of the second stepped surface is at 60°-120° with the direction of the incident light path.

[0015] According to another specific embodiment of the present invention, an envelope is disclosed, wherein the first stepped surface includes a first surface and a second surface, the first surface faces the first reflector, the second surface faces away from the first reflector, the first surface forms an acute angle with the direction of the reflected light path, and the first surface and the second surface form an angle of 60°-120°.

[0016] According to another specific embodiment of the present invention, an envelope is disclosed, wherein the angle between the first surface and the direction of the reflected light path is 30°-60°.

[0017] According to another specific embodiment of the present invention, an envelope is disclosed, wherein the second stepped surface includes a third surface and a fourth surface, the third surface faces the image generation unit, the fourth surface faces away from the image generation unit, the third surface forms an acute angle with the incident light path direction, and the third surface and the fourth surface form an angle of 60°-120°.

[0018] According to another specific embodiment of the present invention, an envelope is disclosed, wherein the angle between the third surface and the incident light path direction is 30°-60°.

[0019] According to another specific embodiment of the present invention, an envelope is disclosed, wherein a textured layer is provided on the first step surface and / or the second step surface.

[0020] By employing the above technical solution, the originally relatively concentrated "escaped" light is dispersed in all directions into very weak and uniform diffuse reflection light by setting up a skin texture layer. The intensity of this light is far below the threshold that the human eye can perceive, thus completely eliminating visible reflection.

[0021] According to another specific embodiment of the present invention, an envelope is disclosed, wherein the first stepped surface includes a plurality of first steps that are disconnected or misaligned along its direction, and the second stepped surface includes a plurality of second steps that are disconnected or misaligned along its direction.

[0022] According to another specific embodiment of the present invention, an envelope is disclosed, wherein the height of the first step surface is 0.1-2mm and the height of the second step surface is 0.1-2mm.

[0023] This utility model also discloses a HUD component, including:

[0024] The envelope as described in any of the above embodiments;

[0025] The image generation unit is located inside the envelope;

[0026] A first reflecting mirror is disposed at the first mounting port;

[0027] The second reflector is located at the second mounting port;

[0028] The upper cover is placed over the envelope.

[0029] The beneficial effects of this utility model include at least the following:

[0030] Highly efficient stray light suppression: By setting stepped surfaces at specific acute angles to the optical path at key locations on the inner wall of the envelope (i.e., at least a portion of the first sidewall, second sidewall, bottom wall, and sidewall of the recess mentioned above), stray light that may enter the main optical path can be reflected to an area that will not interfere with imaging or dissipated through multiple reflections. This stepped structure is more proactive and efficient than a simple light-absorbing coating, especially when dealing with large-angle incident light.

[0031] The structure is simple and easy to manufacture: the first and second stepped surfaces can be integrally formed with the main body of the envelope, for example, directly through injection molding. This eliminates post-processing steps such as spraying and pasting, reducing manufacturing costs, improving production efficiency, and avoiding reliability risks caused by coating peeling.

[0032] Improved image quality: Effectively reduces stray light interference, resulting in higher contrast and cleaner images displayed on the HUD, effectively improving ghosting and glare issues, and enhancing the user experience.

[0033] High design flexibility: By adjusting the angle, height, shape (continuous or discontinuous) and surface roughness of the first and second step surfaces, it can be flexibly optimized according to different optical designs to achieve the best stray light suppression effect.

[0034] To make the above-mentioned contents of this utility model more obvious and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0035] Figure 1 This invention illustrates the three-dimensional shape of the envelope provided by the present invention. Figure 1 ;

[0036] Figure 2 This invention illustrates the three-dimensional shape of the envelope provided by the present invention. Figure 2 ;

[0037] Figure 3A An enlarged view of the first step surface provided by this utility model is shown;

[0038] Figure 3B An enlarged view of the second step surface provided by this utility model is shown;

[0039] Figure 4A A schematic diagram of another first step surface provided by this utility model is shown;

[0040] Figure 4B This diagram shows another second step surface provided by the present invention.

[0041] In the attached figures, the following labels are used:

[0042] 100 Envelope cover; 110 First mounting part; 111 First sidewall; 112 First mounting opening; 120 Second mounting part; 121 Second sidewall; 122 Second mounting opening; 130 Bottom wall; 140 Recess; 141 Front envelope surface; 142 Lower envelope surface; 143 Left envelope surface; 145 Top end; 146 Bottom end; 147 First end; 148 Second end; 150 First step surface; 151 First surface; 152 Second surface; 160 Second step surface; 161 Third surface; 162 Fourth surface;

[0043] 200 image generation units;

[0044] 300 First reflecting mirror;

[0045] 400 Second reflecting mirror. Detailed Implementation

[0046] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0047] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0048] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0049] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0050] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0051] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0052] refer to Figure 1 and Figure 2 This application provides a HUD component, including an envelope 100, an image generation unit (PGU) 200 disposed within the envelope 100, a first reflector 300 and a second reflector 400, and a top cover (not shown) for sealing the envelope 100. Light is emitted from the image generation unit 200 to the first reflector 300, then reflected by the first reflector 300 to the second reflector 400, and then enters the human eye. During this process, a virtual optical envelope surface is formed, which is determined by ray tracing simulation.

[0053] The envelope 100 is the substrate that houses and protects the core optical components of the HUD. It mainly includes a first mounting part 110, a second mounting part 120, and a bottom wall 130.

[0054] For example, refer to Figure 1 The first mounting part 110 and the second mounting part 120 are along the first direction X (i.e. Figure 1 The mirrors are arranged opposite each other in the X direction (as shown), forming a first mounting port 112 and a second mounting port 122. The first reflector 300 is mounted in the first mounting port 112, and the second reflector 400 is mounted in the second mounting port 122. The second reflector 400 and the first reflector 300 are aligned in the direction of the reflected light path (i.e., ...). Figure 1 As shown in L2), they are directly opposite each other. The first mounting portion 110 has a first sidewall 111, and the second mounting portion 120 has a second sidewall 121. The first sidewall 111 and the second sidewall 121 are also arranged opposite each other along the first direction X. The bottom wall 130 is connected to the first sidewall 111 and the second sidewall 121, and the bottom wall 130 is recessed to form a recess 140. The image generating unit 200 (e.g., a projection lens group) is mounted in the recess 140, and the image generating unit 200 and the first reflecting mirror 300 are aligned in the incident light path direction (i.e., Figure 1As shown in L1), the light output port of the image generation unit 200 is directly opposite the first reflecting mirror 300, thus forming the incident light path L1. The first reflecting mirror 300 reflects the light from the image generation unit 200 to the second reflecting mirror 400, forming the reflected light path L2. The second reflecting mirror 400 then reflects the light to the car windshield (not shown), and finally enters the human eye.

[0055] To effectively suppress stray light, this embodiment of the application designs a special stepped surface structure on the inner wall of the envelope 100. A first stepped surface 150 is formed on at least a portion of the first sidewall 111, the second sidewall 121, and the bottom wall 130. That is, the first stepped surface 150 can be provided on the first sidewall 111, the second sidewall 121, and the bottom wall 130; or, the first stepped surface 150 can be provided on the first sidewall 111 and the second sidewall 121; or, a portion of the first sidewall 111, a portion of the second sidewall 121, and a portion of the bottom wall 130 can all have the first stepped surface 150.

[0056] refer to Figure 3A and Figure 4A The first stepped surface 150 includes a first surface 151 and a second surface 152, which are connected. The first surface 151 faces the first reflector 300, and the second surface 152 faces away from the first reflector 300. The included angle α3 between the first surface 151 and the second surface 152 is 60°-120°. The first surface 151 forms an acute angle α1 with the reflected light path L2 (i.e., the light path from the first reflector 300 to the second reflector 400). Furthermore, the first stepped surface 150 extends along a direction in which the included angle α2 with the reflected light path L2 is less than or equal to 120°. The height H1 of the first stepped surface 150 is 0.1-2 mm. For example, the height H1 of the first stepped surface 150 shown in the embodiment of this application is 0.13 mm, but it is not limited to this. The height H1 can also be 0.1 mm, 0.15 mm, 0.2 mm, etc.

[0057] Specifically, the explanation will be carried out using the first step surface 150 on the first side wall 111 as an example. Figure 3A The thick dashed line represents the reflected light path L2, which is parallel to the original surface of the first sidewall 111 (i.e., the surface without the first step surface 150). The angle between the first surface 151 and the reflected light path L2 is α1, which is 45°. The extension direction of the first step surface 150 is AB in the figure, and A'B' is parallel to it. The angle between A'B' and the reflected light path L2 is α2, which means the angle between AB and the reflected light path L2 is α2. In other words, the angle between the extension direction of the first step surface 150 and the reflected light path L2 is α2, which is 90°.

[0058] The reflected light path L2 is parallel to the original wall surfaces of the first sidewall 111, the second sidewall 121, and the bottom wall 130.

[0059] During HUD operation, some light rays may scatter from the edge or non-working surface of the second reflector 400 and illuminate the first sidewall 111, the second sidewall 121, or the bottom wall 130. Without the first stepped surface 150, these rays might be directly reflected back into the main optical path, forming stray light. However, with the first stepped surface 150, these stray rays are reflected onto the stepped surface, avoiding reflections in specific directions and directing stray light that might enter the main optical path to an area that does not interfere with imaging. Since the stepped surface forms an acute angle with the reflected light path L2, the reflected light rays will be guided away from the reflected light path L2, such as striking the top of the envelope 100 or being absorbed by other structures, thus preventing interference with imaging.

[0060] For example, the included angle α1 ranges from 30° to 60°, within which the stray light deflection effect and structural compactness achieve the best balance. For example, the included angle α1 shown in the embodiment of this application is 45°, but it is not limited to this; the included angle α1 can also be 30°, 35°, 40°, 48°, 50°, 60°, etc. The included angle α2 ranges from 60° to 120°. For example, the included angle α2 shown in the embodiment of this application is 90°, but it is not limited to this; the included angle α2 can also be 60°, 65°, 70°, 75°, 80°, 100°, 120°, etc. The included angle α3 ranges from 60° to 120°. For example, the included angle α3 shown in the embodiment of this application is 90°, but it is not limited to this; the included angle α3 can also be 60°, 65°, 70°, 75°, 80°, 100°, 120°, etc.

[0061] For example, refer to Figure 4A The first step surface 150 does not need to be a continuous, complete plane. It can be designed as multiple planes along its orientation (e.g., Figure 4A The first stage 153 of the AB) is disconnected or misaligned.

[0062] Similarly, the second step surface 160 is formed on the sidewall of the recess 140, specifically it can be the left envelope surface 143, the first sidewall 111, or the lower envelope surface 142. For example, the sidewall of the recess 140 includes a front envelope surface 141, a lower envelope surface 142, a left envelope surface 143, and a first sidewall 111. The first sidewall 111 is disposed opposite to the left envelope surface 143 along a first direction, mainly constraining the left and right sides of the image generation unit 200. The lower envelope surface 142 is connected to the bottom surface of the left envelope surface 143 and the first sidewall 111, and extends to the first mounting opening along the incident light path direction. The lower envelope surface 142 plays an important role in guiding light and preventing it from leaking downwards. The front envelope surface 141 is located at the innermost end of the recess 140, and the image generation unit 200 is mounted on the front envelope surface 141.

[0063] For example, the front envelope 141 includes a top end 145 and a bottom end 146, with the top end 145 of the front envelope 141 flush with the bottom wall 130; the lower envelope 142 includes a first end 147 and a second end 148, with the first end 147 connected to the bottom end 146 of the front envelope 141, and the second end 148 being positioned higher than the first end 147 along the direction from the bottom end 146 to the top end 145 of the front envelope 141.

[0064] The second stepped surface 160 includes a third surface 161 and a fourth surface 162, which are connected. The third surface 161 faces the image generation unit 200, and the fourth surface 162 faces away from the image generation unit 200. The included angle β3 between the third surface 161 and the fourth surface 162 is 60°-120°. The third surface 161 forms an acute angle β1 with the incident light path L1 (i.e., the light path from the image generation unit 200 to the first reflecting mirror 300). Furthermore, the stepped surface extends along a direction with an included angle β2 less than or equal to 120° with the incident light path L1. The height H2 of the second stepped surface 160 is 0.1-2 mm. For example, the height H2 of the second stepped surface 160 shown in the embodiment of this application is 0.13 mm, but it is not limited to this. The height H1 can also be 0.1 mm, 0.15 mm, 0.2 mm, etc.

[0065] Specifically, the second step surface 160 on the envelope surface 142 will be used as an example for further explanation. Figure 3B The thick dashed line represents the incident light path L1, which is parallel to the original surface of the lower envelope surface 142 (i.e., the surface without the second step surface 160). The angle between the third surface 161 and the incident light path L1 is β1, which is 40°. The extension direction of the second step surface 160 is CD in the figure, and C'D' is parallel to it. The angle between D'D' and the incident light path L1 is β2, which means the angle between CD and the incident light path L1 is β2. The angle between the extension direction of the second step surface 160 and the incident light path L1 is β2, which is 90°.

[0066] The image generation unit 200 itself or the first reflector 300 may also generate scattered light, which may illuminate the sidewall of the recess 140. The second step surface 160 has a similar function to the first step surface 150, reflecting these stray lights from the vicinity of the incident light path L1 into a safe area to prevent them from entering the subsequent light path.

[0067] For example, the included angle β1 ranges from 30° to 60°, within which the stray light deflection effect and structural compactness achieve the best balance. For instance, the included angle β1 shown in the embodiments of this application is 40°, but it is not limited to this; the included angle β1 can also be 30°, 35°, 45°, 48°, 50°, 60°, etc. The included angle β2 ranges from 60° to 120°, for example, the included angle β2 shown in the embodiments of this application is 90°, but it is not limited to this; the included angle β2 can also be 60°, 65°, 70°, 75°, 80°, 100°, 120°, etc. The included angle β3 ranges from 60° to 120°, for example, the included angle β3 shown in the embodiments of this application is 90°, but it is not limited to this; the included angle β3 can also be 60°, 65°, 70°, 75°, 80°, 100°, 120°, etc.

[0068] The incident light path L1 is parallel to the original wall surface of the sidewall of the recess 140.

[0069] For example, a textured layer can be formed on the surfaces of the first step surface 150 and the second step surface 160, or only on the surface of the first step surface 150, or only on the surface of the second step surface 160. This textured layer can be integrally formed with the envelope 100 by means of die etching or other methods. This tiny uneven structure allows light irradiated onto the surface to undergo diffuse reflection, further dispersing residual directional reflected light, making its energy more dispersed and less likely to cause interference.

[0070] For example, refer to Figure 4B The second step surface 160 does not need to be a continuous, complete plane. It can be designed as multiple planes along its orientation (e.g., Figure 3B The second stage 163 of the CD) is disconnected or misaligned.

[0071] The envelope 100 of this application embodiment can be integrally molded using high-strength, high-stability engineering plastics through injection molding. All complex structures such as stepped surfaces, textures, and recesses 140 are formed in one step in the mold, eliminating the need for subsequent machining or surface treatment, which greatly reduces manufacturing costs and ensures product consistency and reliability.

[0072] During assembly, simply install the image generation unit 200, the first reflector 300, the second reflector 400, etc., into the predetermined positions of the envelope 100, and then cover it with the top cover to form a complete, high-performance HUD core module.

[0073] In summary, this application constructs a highly efficient stray light suppression system by innovatively designing a stepped surface with a specific angle and shape on the inner wall of the envelope 100. This solution has an ingenious structure, is easy to implement, and can significantly improve the imaging quality of the HUD, possessing strong practical value and market potential.

[0074] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. An envelope, characterized in that, include: The first mounting part has a first sidewall; The second mounting part is disposed opposite to the first mounting part along a first direction and forms a first mounting port and a second mounting port. The first mounting port is used to mount the first reflector, and the second mounting port is used to mount the second reflector. The second reflector is directly opposite to the first reflector in the direction of reflected light path. The second mounting part has a second sidewall, which is disposed opposite to the first sidewall along the first direction. A bottom wall, connected to the first side wall and the second side wall, is recessed to form a recess for mounting an image generation unit. The image generation unit is directly opposite the first reflector in the incident light path direction. The first sidewall, the second sidewall, and the bottom wall are at least partially provided with a first stepped surface, and the sidewall of the recess is at least partially provided with a second stepped surface. The first stepped surface forms an acute angle with the direction of the reflected light path and extends in a direction less than or equal to 120° with the direction of the reflected light path. The second stepped surface forms an acute angle with the direction of the incident light path and extends in a direction less than or equal to 120° with the direction of the incident light path.

2. The envelope according to claim 1, characterized in that, The extension direction of the first step surface is at an angle of 60°-120° to the direction of the reflected light path, and the extension direction of the second step surface is at an angle of 60°-120° to the direction of the incident light path.

3. The envelope according to claim 1, characterized in that, The first step surface includes a first surface and a second surface. The first surface faces the first reflector, and the second surface faces away from the first reflector. The first surface forms an acute angle with the direction of the reflected light path, and the first surface and the second surface form an angle of 60°-120°.

4. The envelope according to claim 3, characterized in that, The angle between the first surface and the direction of the reflected light path is 30°-60°.

5. The envelope according to claim 1, characterized in that, The second step surface includes a third surface and a fourth surface. The third surface faces the image generation unit, and the fourth surface faces away from the image generation unit. The third surface forms an acute angle with the incident light path direction, and the third surface and the fourth surface form an angle of 60°-120°.

6. The envelope according to claim 5, characterized in that, The angle between the third surface and the direction of the incident light path is 30°-60°.

7. The envelope according to claim 1, characterized in that, A textured layer is provided on the first step surface and / or the second step surface.

8. The envelope according to claim 1, characterized in that, The first step surface includes multiple first steps that are disconnected or misaligned along its direction, and the second step surface includes multiple second steps that are disconnected or misaligned along its direction.

9. The envelope according to claim 1, characterized in that, The height of the first step surface is 0.1-2mm, and the height of the second step surface is 0.1-2mm.

10. A HUD component, characterized in that, include: The envelope as described in any one of claims 1-9; The image generation unit is located inside the envelope; A first reflecting mirror is disposed at the first mounting port; The second reflector is located at the second mounting port; The upper cover is disposed on the envelope.

Images