Image generation unit and head-up display

Abstract

The embodiment of the utility model provides an image generation unit and a head-up display. The image generation unit comprises a shell, a display screen, a shaping lens, a collimating lens, a fixing frame, a lamp panel and a heat dissipation block, the display screen is fixedly arranged at the first opening end of the shell in the first direction, and a diffusion film is arranged on the end face, facing the shell, of the display screen. The shaping lens and the collimating lens are both arranged in the hollow cavity of the shell, the shaping lens is located on the side, close to the first opening end, of the hollow cavity, the collimating lens is located on the side, close to the second opening end of the shell in the first direction, of the hollow cavity, and the main optical axis of the shaping lens coincides with the main optical axis of the collimating lens; the fixing frame is arranged in the hollow cavity and located between the shaping lens and the collimating lens, and the fixing frame is used for limiting and fixing the shaping lens and the collimating lens; the lamp panel is fixedly arranged in the hollow cavity and located at the second opening end. The heat dissipation block is installed on the shell and seals the second opening end, and the heat dissipation block is in heat conduction connection with the lamp panel.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and more specifically, to an image generation unit and a head-up display. Background Technology

[0002] A Heads-Up Display (HUD) is an intelligent in-vehicle system that projects important driving information such as speed, navigation, and road conditions onto the windshield in front of the driver. This allows the driver to view important driving information without looking down or turning their head, effectively improving driving efficiency and safety. It is indispensable in modern intelligent driving vehicles. Currently, there are four main projection technologies for HUDs on the market: TFT-LCD (Thin Film Transistor-Liquid Crystal Display), DLP (Digital Light Processing), LBS (Laser Beam Scanning), and LCOS (Liquid Crystal On Silicon). Among these, TFT-LCD and DLP are the two most widely used solutions. Compared to TFT-LCD, DLP offers greater brightness and larger size, but TFT-LCD is less expensive.

[0003] Currently, TFT-LCDs on the market mainly employ two types of PGU (Picture Generation Unit) solutions: stand-alone PGUs and integrated PGUs. A stand-alone PGU refers to assembling the PGU as a separate small assembly onto the HUD's outer housing; that is, the entire PGU is mounted to the HUD's housing solely through mounting ears on the PGU casing. An integrated PGU, on the other hand, involves disassembling each component of the PGU and assembling them separately onto the HUD's outer housing. Because the integrated PGU solution has a more complex structure and involves more precision parts, it presents higher challenges in assembly and manufacturing processes; therefore, stand-alone PGUs are more commonly used. However, the stand-alone PGU solution requires the optical components to be assembled separately within the PGU housing. These optical components are stacked vertically and are numerous, making the assembly, precise positioning, and fixation of the optical components a significant challenge.

[0004] Currently, most independent PGU solutions for automotive HUDs using TFT-LCD projection technology employ clip-on fixing for the display screen and diffuser film. The collimating lens, shaping lens, and lamp panel are stacked sequentially and then secured to the heat sink and thermal pads with screws. Due to the stacked arrangement of optical components, the collimating lens is often located deep within the PGU housing, making assembly difficult. Furthermore, securing the stacked collimating lens, shaping lens, lamp panel, and thermal pads is challenging. Using bolts for individual fixing would increase costs, and the internal screws would increase the risk of glare. Fixing only one component cannot guarantee that other components are fully constrained. Utility Model Content

[0005] This application provides an image generation unit and a head-up display that are easy to assemble, position, and fix reliably, solving the problems of difficult assembly of the shaping lens and low reliability of positioning and fixing after stacking collimating lens, shaping lens, lamp board, and heat sink in the existing independent PGU solution.

[0006] In a first aspect, according to embodiments of this application, an image generation unit is provided, comprising:

[0007] The outer casing is hollow inside and has openings at both ends along a first direction;

[0008] The display screen is fixedly disposed at the first opening end of the housing along the first direction, and a diffusion film is disposed on the end face of the display screen facing the housing;

[0009] Both the shaping lens and the collimating lens are disposed within the hollow cavity of the housing, with the shaping lens located on the side of the hollow cavity near the first opening end and the collimating lens located on the side of the hollow cavity near the second opening end of the housing along the first direction. The principal optical axis of the shaping lens coincides with the principal optical axis of the collimating lens.

[0010] A fixing frame is disposed within the hollow cavity and located between the shaping lens and the collimating lens. The fixing frame is used for limiting and fixing the shaping lens and the collimating lens.

[0011] The lamp panel is fixedly disposed in the hollow cavity and located at the second opening end;

[0012] A heat sink is mounted on the housing to seal the second opening end, and the heat sink is thermally connected to the lamp panel.

[0013] The first direction is the direction of the principal optical axis of the shaping lens.

[0014] In some embodiments of this application, it further includes: a top cover, the top cover being a cover plate structure with a central opening, and at least one connecting portion symmetrically arranged on opposite end faces of the top cover along a second direction, each connecting portion extending from the top cover toward the outer shell along a first direction, and each connecting portion being provided with a slot;

[0015] A display receiving plate is provided on the four inner walls of the outer casing. The display receiving plate is located on one side of the first opening end and extends inward from the four inner walls in a direction perpendicular to the four inner walls. The edges of the display screen and the diffusion film are provided on the display receiving plate. At least one locking block is provided on each of the opposite sides of the outer casing along the second direction. The position of each locking block corresponds one-to-one with the position of the plurality of locking slots.

[0016] When each of the card blocks is respectively engaged in the corresponding card slot, and the top cover is fixedly engaged in the first opening end of the outer shell, the top cover abuts and fixes the display screen and the diffusion film to the display support plate.

[0017] The second direction is perpendicular to the first direction.

[0018] In some embodiments of this application, at least one first film positioning structure is provided on the inner two walls of the outer shell along the second direction, and multiple first film positioning structures are located on the side of the display receiving plate near the first opening end. At least one second film positioning structure is provided on the opposite ends of the diffusion film along the second direction, and each second film positioning structure is respectively provided in one-to-one correspondence with multiple first film positioning structures. By cooperating and installing each first film positioning structure with its corresponding second film positioning structure, the display screen and the diffusion film are positioned and installed on the display receiving plate, and the display screen and the diffusion film are limited and fixed in the second direction and the third direction.

[0019] Wherein, the third direction, the second direction, and the first direction are mutually perpendicular, and the plane where the display screen is located is set at an acute angle to the plane formed by the third direction and the second direction.

[0020] In some embodiments of this application, at least one limiting and fixing structure is provided on the inner side wall of the first opening end of the housing along the high side in the third direction, and two first pressing structures are provided on the lower side of the first opening end of the housing along the third direction. Each of the first pressing structures is a deformable elastic structure in the third direction. When the display screen and the diffusion film are assembled into the housing, one end of the display screen and the diffusion film along the third direction is limited and fixed by the limiting and fixing structure, and the other end of the display screen and the diffusion film along the third direction is elastically pressed and fixed by the two first pressing structures, so that the display screen and the diffusion film are limited and fixed in the third direction.

[0021] The upper cover is provided with a second pressing structure at one end near the limiting and fixing structure along the third direction, and two third pressing structures at one end near the first pressing structure along the third direction. The second pressing structure and each of the third pressing structures are elastic structures that can deform in a direction perpendicular to the display support plate. The upper cover is provided with multiple abutting structures on the end face near the outer shell, and each abutting structure is respectively provided with multiple first film positioning structures and limiting and fixing structures.

[0022] When the display screen and the diffusion film are assembled onto the housing via the top cover, the display screen is elastically pressed and fixed along a direction perpendicular to the display support plate by one second pressing structure and two third pressing structures. At the same time, each abutting structure abuts and is fixed to its corresponding first film positioning structure or limiting fixing structure, so that the top cover, the display screen, and the diffusion film are limited and fixed in a direction perpendicular to the display support plate.

[0023] In some embodiments of this application, the hollow cavity of the outer shell is provided with support and fixing structures on the two inner walls along the third direction, and each support and fixing structure is provided close to the first opening end. The end faces of all the support and fixing structures close to the second opening end along the first direction are on the same horizontal plane. The hollow cavity of the outer shell is provided with a support and fixing groove on the two inner walls along the second direction, and each support and fixing groove is provided with a limiting structure.

[0024] The shaping lens has a first support structure on each of its two opposite sides along the third direction, and each first support structure is corresponding to one of the multiple support fixing structures. The shaping lens has a second support structure on each of its two opposite sides along the second direction, and each second support structure is corresponding to one of the multiple support fixing grooves. The first support structure and the second support structure are both located on one side of the plane of the shaping lens. Each second support structure has a gripper structure on its end face away from the concave surface of the shaping lens. Each gripper structure extends from the end face of the second support structure away from the plane of the shaping lens in the first direction. Each second support structure has a first limiting groove.

[0025] When the shaping lens and the fixing frame are assembled inside the housing, the end face of each first support structure approaching the concave surface of the shaping lens along the first direction abuts against the corresponding support fixing structure, and the end face of each second support structure approaching the concave surface of the shaping lens along the first direction abuts against the corresponding support fixing groove. Each limiting structure is positioned and inserted into its corresponding first limiting groove. Simultaneously, the fixing frame abuts against the end face of each first support structure approaching the plane of the shaping lens along the first direction, and against the end face of each second support structure approaching the plane of the shaping lens along the first direction, thereby fixing the shaping lens within the housing. Both gripper structures are inserted into the fixing frame.

[0026] In some embodiments of this application, each of the second support structures is disposed upward toward one of the first support structures in the third party, and each of the first limiting grooves is disposed upward toward another of the first support structures in the third party.

[0027] In some embodiments of this application, the fixing frame includes a first fixing wall, a second fixing wall, a third fixing wall, and a fourth fixing wall connected end to end in sequence. The first fixing wall and the third fixing wall are located at both ends of the fixing frame along the second direction, and the second fixing wall and the fourth fixing wall are located at both ends of the fixing frame along the third direction. A lens receiving plate is provided at one end of the first fixing wall, the second fixing wall, the third fixing wall, and the fourth fixing wall near the second opening end of the outer shell. The lens receiving plate extends outward from the fixing frame on the plane formed by the third direction and the second direction. The first fixing wall and the third fixing wall are near the first opening of the outer shell. Each of the first and fourth fixed walls has a first fixed abutment part at one end, and each first fixed abutment part is respectively configured to correspond one-to-one with a plurality of second support structures. The outer side walls of the first fixed wall and the fourth fixed wall are each provided with a second limiting groove, and each second limiting groove is respectively configured to correspond one-to-one with a plurality of limiting structures. The inner side walls of the first fixed wall and the fourth fixed wall are each provided with a gripper fixing groove, and each gripper fixing groove is respectively configured to correspond one-to-one with a plurality of gripper structures. The end of the second fixed wall and the fourth fixed wall near the first opening end of the outer shell is respectively provided with a second fixed abutment part, and each second fixed abutment part is respectively configured to correspond one-to-one with a plurality of first support structures.

[0028] The collimating lens is provided with a third limiting groove at each end along the second direction, and each third limiting groove is provided in a one-to-one correspondence with a plurality of limiting structures;

[0029] When the shaping lens, the fixing frame, and the collimating lens are assembled inside the housing, each of the first fixed abutment portions abuts against the end face of each of the second support structures along the first direction near the plane of the shaping lens, and multiple limiting structures are respectively inserted into their corresponding second limiting grooves. Simultaneously, multiple gripper structures are respectively inserted into their corresponding gripper fixing grooves. Each of the second fixed abutment portions abuts against the end face of each of the first support structures along the first direction near the plane of the shaping lens, thus achieving the positioning and fixing of the fixing frame and the abutment fixing of the shaping lens within the housing. The collimating lens abuts against the end face of the lens receiving plate near the second opening end of the housing, and multiple limiting structures are respectively inserted into their corresponding third limiting grooves, thus achieving the positioning and fixing of the collimating lens and the abutment fixing of the collimating lens against the fixing frame within the housing.

[0030] In some embodiments of this application, each of the gripper fixing slots is provided with at least two first pressure-feed ribs. When the shaping lens and the fixing frame are assembled in the housing, each of the first pressure-feed ribs abuts against its corresponding gripper structure to limit and fix the shaping lens in the second direction.

[0031] Each of the limiting structures is a three-tiered structure comprising a large-diameter portion, a medium-diameter portion, and a small-diameter portion. The second limiting groove is a three-tiered groove corresponding to the limiting structure, and a second pressure-feeding rib is provided in the medium-diameter groove of each second limiting groove. The end of each large-diameter portion near the first opening end is respectively positioned and inserted into the corresponding first limiting groove. The end of each large-diameter portion away from the first opening end, the end of each medium-diameter portion, and the end of each small-diameter portion away from the second opening end are respectively positioned and inserted into the corresponding second limiting groove. The end of each small-diameter portion near the second opening end is respectively positioned and inserted into the corresponding third limiting groove. Each second pressure-feeding rib abuts against its corresponding medium-diameter portion, thereby achieving limiting and fixing of the fixing frame in the second direction.

[0032] In some embodiments of this application, a first positioning post is provided on the inner sidewall of one end of the housing along the second direction, and a second positioning post is provided on the outer sidewall of the other end of the housing along the second direction. Both the first positioning post and the second positioning post are located on the side of the housing along the first direction close to the second opening end, and a plurality of first threaded mounting holes are provided at the second opening end of the housing.

[0033] The fixing frame is provided with a first positioning groove at one end along the second direction, and the first positioning groove is provided in correspondence with the first positioning post;

[0034] The collimating lens is provided with a second positioning groove at one end along the second direction. The second positioning groove is provided in correspondence with the first positioning post. A third support structure is provided at each of the four edges of the end face of the collimating lens near the second opening end of the housing. Each third support structure extends from the collimating lens along the first direction toward the direction near the second opening end. A third positioning post is provided on each of the two third support structures that are arranged opposite to each other along the second direction.

[0035] The lamp panel is provided with two third positioning slots, and each third positioning slot is respectively provided in one-to-one correspondence with the two third positioning posts;

[0036] The heat sink is provided with two first positioning grooves, each of which corresponds to the first positioning post and the second positioning post respectively. The heat sink is provided with two second positioning grooves, each of which corresponds to the two third positioning posts respectively. The heat sink is provided with multiple second threaded mounting holes, each of which corresponds to multiple first threaded mounting holes respectively. In addition, multiple abutment fixing blocks are provided on the end face of the heat sink near the outer shell.

[0037] When the mounting bracket, the collimating lens, and the lamp plate are assembled inside the housing, and the heat sink is assembled on the housing, the first positioning post is sequentially inserted into the first positioning groove of the mounting bracket and the second positioning groove of the collimating lens to achieve the positioning and installation of the mounting bracket and the collimating lens. The lamp plate is positioned and installed by being inserted into the corresponding third positioning post through the two third positioning grooves, and the end face of the lamp plate away from the second opening end abuts against the four third support structures. The heat sink is positioned and installed by the first positioning post and the second positioning post abutting against the two first positioning grooves, and by the two third positioning posts abutting against the two second positioning grooves. The heat sink is fixed and installed on the housing by multiple screws sequentially passing through the second threaded mounting hole and the first threaded mounting hole, and multiple abutting fixing blocks abut against and fix the end face of the lamp plate near the second opening end.

[0038] The second direction is perpendicular to the first direction.

[0039] Secondly, according to embodiments of this application, a head-up display is provided, including: the image generation unit described in the first aspect.

[0040] The beneficial effects of the embodiments of this application are as follows:

[0041] This image generation unit achieves screwless fixing of the display screen and diffuser film to the housing via a snap-fit ​​connection between the top cover and the outer shell. Furthermore, the specific structural design of the top cover and housing allows for precise positioning and installation of the display screen and diffuser film on the housing. Simultaneously, by utilizing the mutual abutment between the shaping lens, mounting bracket, collimating lens, lamp board, and heat sink within the housing, and by threading the heat sink to the outside of the housing, the shaping lens, collimating lens, mounting bracket, and lamp board can be fixedly installed within the housing using only four external screws. The specific structural design of the shaping lens, collimating lens, mounting bracket, lamp board, heat sink, and housing ensures precise positioning and installation of each component on the housing, facilitating assembly and ensuring reliable positioning and fixing. This solves the problems of difficult assembly of the shaping lens and low reliability of positioning and fixing after stacking the collimating lens, shaping lens, lamp board, and heat sink in existing independent PGU solutions. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a top view of an image generation unit provided in an embodiment of this application;

[0044] Figure 2 This is a bottom view of an image generation unit without screws installed, provided in an embodiment of this application.

[0045] Figure 3 An exploded view of an image generation unit provided in an embodiment of this application;

[0046] Figure 4 This is a top view of the upper cover structure in an image generation unit provided in an embodiment of this application;

[0047] Figure 5 This is a bottom view of the upper cover structure in an image generation unit provided in an embodiment of this application;

[0048] Figure 6 This is a top view of the outer shell of an image generation unit provided in an embodiment of this application;

[0049] Figure 7 This is a bottom view of the outer shell of an image generation unit provided in an embodiment of this application;

[0050] Figure 8This is a schematic diagram of the structure of a shaping lens in an image generation unit provided in an embodiment of this application;

[0051] Figure 9 This is a schematic diagram of the first structure of the fixing frame in an image generation unit provided in an embodiment of this application;

[0052] Figure 10 This is a schematic diagram of the second structure of the fixing frame in an image generation unit provided in an embodiment of this application;

[0053] Figure 11 This is a schematic diagram of the collimating lens in an image generation unit provided in an embodiment of this application;

[0054] Figure 12 This is a schematic diagram of the structure of a light panel in an image generation unit provided in an embodiment of this application;

[0055] Figure 13 This is a bottom view of the heat sink in an image generation unit provided in an embodiment of the present application;

[0056] Figure 14 A top view of a heat sink in an image generation unit provided in an embodiment of this application;

[0057] Explanation of reference numerals in the attached drawings: 1 is the outer shell; 11 is the display receiving plate; 12 is the locking block; 13 is the first film positioning structure; 14 is the limiting and fixing structure; 15 is the first pressing structure; 16 is the supporting and fixing structure; 17 is the supporting and fixing groove; 18 is the limiting structure; 181 is the large diameter section; 182 is the medium diameter section; 183 is the small diameter section; 19 is the first positioning post; 10 is the second positioning post; 101 is the first opening end of the outer shell 1; 102 is the hollow cavity of the outer shell 1; 103 is the second opening end of the outer shell 1; 104 is the first threaded mounting hole; 105 is the interface groove; 106 is the supporting and positioning groove; 2 is the display screen; 3 is the shaping lens; 31 is the first supporting structure; 311 is the rectangular opening; 32 is the second supporting structure; 33 is the gripper structure; 34 is the first limiting groove; 4 is the collimating lens; 41 is the third limiting groove; 42 is... 43 is the second positioning groove, 44 is the third supporting structure, 5 is the third positioning column, 5 is the fixing frame, 51 is the first fixing wall, 52 is the second fixing wall, 53 is the third fixing wall, 54 is the fourth fixing wall, 55 is the lens receiving plate, 56 is the first fixing abutment part, 57 is the second limiting groove, 58 is the gripper fixing groove, 59 is the second fixing abutment part, 50 is the first pressing rib, 501 is the first positioning groove, 502 is the second pressing rib, 503 is the plug-in fixing block, 6 is the lamp board, 61 is the third positioning groove, 62 is the external interface, 7 is the heat sink, 71 is the first positioning groove, 72 is the second positioning groove, 73 is the second threaded mounting hole, 74 is the abutment fixing block, 8 is the top cover, 81 is the connecting part, 82 is the slot, 83 is the second pressing structure, 84 is the third pressing structure, 85 is the abutment structure, and 9 is the screw. Detailed Implementation

[0058] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0059] It should be noted that the terms "comprising" and "having," and any variations thereof, in the embodiments and accompanying drawings of this application are intended to cover non-exclusive inclusion. For example, it may include a series of structures, without being limited to the structures listed, but may optionally include structures not listed, or may optionally include other components inherent to these structures.

[0060] This application discloses an image generation unit. These will be described in detail below.

[0061] Figure 1 – Figure 3 An image generation unit according to an embodiment of this application is shown. Figure 1 – Figure 3 As shown, the image generation unit mainly includes: a housing 1, a display screen 2, a shaping lens 3, a collimating lens 4, a mounting bracket 5, a lamp board 6, and a heat sink 7. The housing 1 is the main shell structure of the image generation unit, used for mounting and fixing the display screen 2, the shaping lens 3, the collimating lens 4, the mounting bracket 5, the lamp board 6, and the heat sink 7. The housing 1 is hollow internally and has openings at both ends along a first direction. The display screen 2 is fixedly mounted on the first opening end 101 of the housing 1 along the first direction, and a diffusion film (not shown in the figure) is provided on the end face of the display screen 2 facing the housing 1. The shaping lens 3 and the collimating lens 4 are both disposed within the hollow cavity 102 of the housing 1, with the shaping lens 3 located in the hollow cavity 102 near the first opening end 101. On one side, the collimating lens 4 is located on the side of the hollow cavity 102 near the second opening end 103 of the outer shell 1 along the first direction, and the principal optical axis of the shaping lens 3 coincides with the principal optical axis of the collimating lens 4; at the same time, the fixing bracket 5 is disposed in the hollow cavity 102 and is located between the shaping lens 3 and the collimating lens 4, and the fixing bracket 5 is used for limiting and fixing the shaping lens 3 and the collimating lens 4; the lamp plate 6 is fixedly disposed in the hollow cavity 102 and is located at the second opening end 103; the heat sink 7 is installed on the outer shell 1 to seal the second opening end 103, and the heat sink 7 and the lamp plate 6 are thermally connected.

[0062] In this application, the first direction is the direction of the principal optical axis of the shaping lens 3, and the third direction, the second direction, and the first direction are all perpendicular to each other. However, it should be noted and understood that the perpendicularity in this application is not absolute, but can be 90°±10°. Similarly, the horizontality in this application is not absolute, but can be 180°±10°.

[0063] In some embodiments, such as Figure 1 – Figure 6As shown, this embodiment of the application further includes: an upper cover 8, which, together with the outer shell 1, constitutes the housing structure of the image generation unit. Specifically, the upper cover 8 is a cover plate structure with a central opening, and at least one connecting portion 81 is symmetrically arranged on opposite end faces of the upper cover 8 along the second direction. Each connecting portion 81 extends from the upper cover 8 towards the outer shell 1 along the first direction, and each connecting portion 81 is provided with a slot 82. Correspondingly, a display receiving plate 11 is provided on the four inner walls of the outer shell 1. The display receiving plate 11 is located on one side of the first opening end 101, and the display receiving plate 11 extends inward from the four inner walls along a direction perpendicular to the four inner walls. The edges of the display screen 2 and the diffusion film are set on the display receiving plate 11, and at least one locking block 12 is respectively set on the opposite two sides of the outer shell 1 along the second direction. The setting position of each locking block 12 corresponds to the setting position of multiple slots 82. When each locking block 12 is respectively locked in its corresponding slot 82, and the upper cover 8 is fixedly locked in the first opening end 101 of the outer shell 1, the upper cover 8 abuts and fixes the display screen 2 and the diffusion film on the display receiving plate 11, thereby realizing the fixed installation of the display screen 2 and the diffusion film on the outer shell.

[0064] In some specific embodiments, such as Figure 1 , Figure 3 and Figure 6 As shown, at least one first film positioning structure 13 is respectively provided on the two inner walls of the outer casing 1 along the second direction, and the plurality of first film positioning structures 13 are located on the side of the display receiving plate 11 near the first opening end 101. Correspondingly, at least one second film positioning structure (not shown in the figure) is respectively provided on the opposite ends of the diffusion film along the second direction, and each second film positioning structure is respectively provided in a one-to-one correspondence with the plurality of first film positioning structures 13. The shape and size of the second film positioning structure match the shape and size of the first film positioning structure 13. Thus, when the display screen 2 and the diffusion film are assembled on the outer casing 1, the display screen 2 and the diffusion film are positioned and installed on the display receiving plate 11 by each first film positioning structure 13 cooperating with its corresponding second film positioning structure, and the display screen 2 and the diffusion film are limited and fixed in the second direction and the third direction. That is, this design, on the one hand, prevents the display screen 2 and the diffusion film from being installed backwards, and on the other hand, realizes the positioning of the display screen 2 and the diffusion film in the second direction and the third direction. It should be noted that in this application, the plane of the display screen 2 assembled on the outer casing 1 is set at an acute angle to the plane formed by the third direction and the second direction.

[0065] In other specific embodiments, such as Figure 1 – Figure 6As shown, at least one limiting and fixing structure 14 is provided on the inner side of the first opening end 101 of the housing 1 along the third direction on the higher side, and two first pressing structures 15 are provided on the lower side of the first opening end 101 of the housing 1 along the third direction. Each first pressing structure 15 is a deformable elastic structure in the third direction. The limiting and fixing structure 14 and the two first pressing structures 15 are all located on the side of the display receiving plate 11 near the first opening end 101. When the display screen 2 and the diffusion film are assembled into the housing 1, one end of the display screen 2 and the diffusion film along the third direction is limited and fixed by the limiting and fixing structure 14, and the other end of the display screen 2 and the diffusion film along the third direction is elastically pressed and fixed by the two first pressing structures 15, thereby limiting and fixing the display screen 2 and the diffusion film in the third direction. More specifically, the deformation amount of each first pressing structure 15 is 0.5mm.

[0066] In addition, a second pressing structure 83 is provided at one end of the upper cover 8 near the limiting and fixing structure 14 along the third direction, and two third pressing structures 84 are provided at one end of the upper cover 8 near the first pressing structure 15 along the third direction. The second pressing structure 83 and each third pressing structure 84 are elastic structures that can deform in a direction perpendicular to the display support plate 11. At the same time, multiple abutting structures 85 are provided on the end face of the upper cover 8 near the outer shell 1. Each abutting structure 85 is respectively provided in correspondence with multiple first film positioning structures 13 and limiting and fixing structures 14. When the display screen 2 and the diffusion film are assembled onto the housing 1 via the upper cover 8, the upper cover 8 is fastened to the first opening end 101 of the housing 1. The diffusion film and the display screen 2 are disposed on the display support plate 11, with the diffusion film located between the display screen 2 and the display support plate 11, and in a direction perpendicular to the display support plate 11. The display screen 2 is elastically pressed and fixed by a second pressing structure 83 and two third pressing structures 84. Simultaneously, each abutting structure 85 abuts and is fixed by its corresponding first film positioning structure 13 or limiting fixing structure 14, thereby limiting and fixing the upper cover 8, the display screen 2, and the diffusion film in a direction perpendicular to the display support plate 11. More specifically, the deformation amount of the second pressing structure 83 and each third pressing structure 84 is 0.5mm. When the upper cover 8 and the outer shell 1 are fastened together by the snap-fit ​​structure (i.e., the snap-fit ​​block 12 and the snap-fit ​​groove 82), the second pressing structure 83 and each of the third pressing structures 84 first contact the display screen 2. When the deformation reaches 0.5mm, each abutting structure 85 of the upper cover 8 contacts its corresponding first film positioning structure 13 or limiting fixing structure 14 to abut and fix it, so as to cooperate with the snap-fit ​​structure of the outside to constrain the upper cover 8 in a position perpendicular to the display support plate 11. Thus, the upper cover 8, the display screen 2 and the diffusion film are all constrained into place.

[0067] In other specific embodiments, such as Figure 1 , Figure 3 and Figure 6 – Figure 8 As shown, the hollow cavity 102 of the outer shell 1 is provided with supporting and fixing structures 16 on its inner two walls along the third direction, and each supporting and fixing structure 16 is located near the first opening end 101. The end faces of all supporting and fixing structures 16 near the second opening end 103 along the first direction are all on the same horizontal plane. The hollow cavity 102 of the outer shell 1 is provided with a supporting and fixing groove 17 on its inner two walls along the second direction, and each supporting and fixing groove 17 is provided with a limiting structure 18. The end of all supporting and fixing structures 16 near the first opening end 101 along the first direction extends from the end face of the display receiving plate 11 away from the first opening end 101. Correspondingly, the shaping lens 3 is provided with first supporting structures 31 on its opposite two sides along the third direction, and each first supporting structure 31 is divided into Each of the multiple support and fixing structures 16 is provided with a second support structure 32 on each of the opposite sides of the shaping lens 3 along the second direction. Each second support structure 32 is provided with a multiple support and fixing groove 17. The first support structure 31 and the second support structure 32 are both located on one side of the plane of the shaping lens 3. Each second support structure 32 is provided with a gripper structure 33 on the end face away from the concave surface of the shaping lens 3. Each gripper structure 33 extends from the end face of the second support structure 32 in the first direction away from the plane of the shaping lens 3. That is, the gripper structure 33 is located on the outside of the plane of the shaping lens 3, so as to facilitate the assembly of the shaping lens 3 into the designated position inside the housing 1 by means of the two gripper structures 33. Each second support structure 32 is provided with a first limiting groove 34. When the shaping lens 3 and the fixing frame 5 are assembled inside the housing 1, the end face of each first support structure 31 approaching the concave surface of the shaping lens 3 along the first direction abuts against the corresponding support fixing structure 16, and the end face of each second support structure 32 approaching the concave surface of the shaping lens 3 along the first direction abuts against the corresponding support fixing groove 17. Each limiting structure 18 is positioned and inserted into the corresponding first limiting groove 34. At the same time, the fixing frame 5 abuts against the end face of each first support structure 31 approaching the plane of the shaping lens 3 along the first direction, and abuts against the end face of each second support structure 32 approaching the plane of the shaping lens 3 along the first direction, thereby fixing the shaping lens 3 inside the housing 1. Both gripper structures 33 are inserted into the fixing frame 5.

[0068] Furthermore, each second support structure 32 is positioned closer to one of the first support structures 31 in the third direction, and each first limiting groove 34 is positioned closer to another first support structure 31 in the third direction. By setting the second support structure 32 and the first limiting groove 34 as an asymmetrical structure in the third direction, the effect of preventing incorrect installation can be achieved.

[0069] In some specific embodiments, such as Figure 1 , Figure 3 and Figure 6 – Figure 11 As shown, the fixing frame 5 includes a first fixing wall 51, a second fixing wall 52, a third fixing wall 53, and a fourth fixing wall 54 connected end to end in sequence. The first fixing wall 51 and the third fixing wall 53 are located at both ends of the fixing frame 5 along the second direction, and the second fixing wall 52 and the fourth fixing wall 54 are located at both ends of the fixing frame 5 along the third direction. A lens receiving plate 55 is provided at one end of the first fixing wall 51, the second fixing wall 52, the third fixing wall 53, and the fourth fixing wall 54 near the second opening end 103 of the outer shell 1. The lens receiving plate 55 extends outward from the fixing frame 5 on the plane formed by the third direction and the second direction. A first fixing abutment part 56 is provided at one end of the first fixing wall 51 and the third fixing wall 53 near the first opening end 101 of the outer shell 1, and each first fixing abutment part 56 is respectively connected to multiple first fixing walls 51 and 52. Two support structures 32 are provided one-to-one, and the outer walls of the first fixed wall 51 and the fourth fixed wall 54 are each provided with a second limiting groove 57. Each second limiting groove 57 is provided one-to-one with a plurality of limiting structures 18. The inner walls of the first fixed wall 51 and the fourth fixed wall 54 are each provided with a gripper fixing groove 58. Each gripper fixing groove 58 is provided one-to-one with a plurality of gripper structures 33. The second fixed wall 52 and the fourth fixed wall 54 are each provided with a second fixing abutment part 59 at one end near the first opening end 101 of the outer shell 1. Each second fixing abutment part 59 is provided one-to-one with a plurality of first support structures 31. At the same time, the collimating lens 4 is provided with a third limiting groove 41 at both ends along the second direction. Each third limiting groove 41 is provided one-to-one with a plurality of limiting structures 18. When the shaping lens 3, the fixing frame 5, and the collimating lens 4 are assembled inside the housing 1, each first fixing abutment part 56 abuts against the end face of each second support structure 32 along the first direction near the plane of the shaping lens 3, and multiple limiting structures 18 are respectively inserted into their corresponding second limiting grooves 57. At the same time, multiple gripper structures 33 are respectively inserted into their corresponding gripper fixing grooves 58. Each second fixing abutment part 59 abuts against the end face of each first support structure 31 along the first direction near the plane of the shaping lens 3, thereby realizing the positioning and fixing of the fixing frame 5 and the abutment and fixing of the fixing frame 5 to the shaping lens 3 inside the housing 1. The collimating lens 4 abuts against the end face of the lens receiving plate 55 near the second opening end 103 of the housing 1, and multiple limiting structures 18 are respectively inserted into their corresponding third limiting grooves 41, thereby realizing the positioning and fixing of the collimating lens 4 and the abutment and fixing of the collimating lens 4 to the fixing frame 5 inside the housing 1.

[0070] In the specific implementation process, the support and fixing structure 16 located at the high side of the first opening end 101 along the third direction can be designed as three spaced-apart elongated support and fixing structures 16. Two support positioning grooves 106 are provided on the inner walls of the hollow cavity 102 of the outer shell 1 along the third direction, with each of the two support positioning grooves 106 corresponding to one of the two support and fixing structures 16 located at the edge. Correspondingly, a rectangular opening 311 is provided in the middle of the first support structure 31. The two ends formed by the rectangular opening 311 are inserted into the two support positioning grooves 106, thereby achieving the positioning and fixing of the shaping lens 3 on the inner wall of the hollow cavity 102 of the outer shell 1. Meanwhile, the lens receiving plate 55 of the fixing frame 5 is provided with two insertion fixing blocks 503 at one end along the third direction. The two insertion fixing blocks 503 are respectively set to correspond one-to-one with the two support positioning grooves 106. By inserting the two insertion fixing blocks 503 into the two support positioning grooves 106, the fixing frame 5 is positioned and fixed on the inner wall of the hollow cavity 102 of the outer shell 1. This design achieves precise positioning and fixing of the shaping lens 3 and the fixing frame 5 in the third direction.

[0071] In other specific embodiments, such as Figure 1 , Figure 3 and Figure 6 – Figure 11 As shown, each gripper fixing slot 58 is provided with at least two first pressure-feeding ribs 50. When the shaping lens 3 and the fixing frame 5 are assembled in the housing 1, each first pressure-feeding rib 50 abuts against its corresponding gripper structure 33, limiting and fixing the shaping lens 3 in the second direction. Thus, by setting the first pressure-feeding ribs 50, after the fixing frame 5 is assembled in place, the shaping lens 3 is constrained in the second direction, avoiding the problem of abnormal noise and misalignment caused by vibration due to assembly gaps.

[0072] Furthermore, each limiting structure 18 is a three-tiered structure including a large-diameter portion 181, a medium-diameter portion 182, and a small-diameter portion 183. The second limiting groove 57 can be designed as a three-tiered groove corresponding to the limiting structure 18. Each second limiting groove 57 has a second pressure-feeding rib 502 in its medium-diameter groove. The end of each large-diameter portion 181 near the first opening end 101 is respectively positioned and inserted into the corresponding first limiting groove 34. The end of each large-diameter portion 181 away from the first opening end 101, the medium-diameter portion 182, and the end of each small-diameter portion 183 away from the second opening end 103 are respectively positioned and inserted into the corresponding second limiting groove 57. The end of each small-diameter portion 183 near the second opening end 103 is respectively positioned and inserted into the corresponding third limiting groove 41. Each second pressure-feeding rib 502 abuts against its corresponding medium-diameter portion 182, thereby achieving limiting and fixing of the fixing frame 5 in the second direction. Of course, the second limiting groove 57 can also be designed as two stepped grooves of different sizes corresponding to the limiting structure 18, respectively corresponding to the large diameter portion 181 and the medium diameter portion 182. A second pressure-feeding rib 502 is provided in the small diameter groove of each second limiting groove 57, so that when the fixing frame 5 is assembled inside the outer shell 1, the second pressure-feeding rib 502 abuts and fixes against its corresponding limiting structure 18. In this application, the fixing frame 5 is constrained in place in the second direction by the provision of the second pressure-feeding rib 502.

[0073] In the embodiments of this application, such as Figure 1 , Figure 3 and Figure 6 – Figure 10 As shown, the limiting structure 18 is an inner guide structure for the shaping lens 3, collimating lens 4 and fixing frame 5 inside the housing 1. The first limiting groove 34, the second limiting groove 57 and the third limiting groove 41 are sleeved on the limiting structure 18 to accurately position and install the shaping lens 3, collimating lens 4 and fixing frame 5 inside the housing 1.

[0074] In other embodiments, such as Figure 1 , Figure 3 , Figure 7 as well as Figure 10 – Figure 14As shown, a first positioning post 19 is provided on the inner sidewall of one end of the outer casing 1 along the second direction, and a second positioning post 10 is provided on the outer sidewall of the other end of the outer casing 1 along the second direction. Both the first positioning post 19 and the second positioning post 10 are located on the side of the outer casing 1 along the first direction near the second opening end 103, and a plurality of first threaded mounting holes 104 are provided at the second opening end 103 of the outer casing 1. Correspondingly, a first positioning groove 501 is provided on one end of the fixing bracket 5 along the second direction, and the first positioning groove 501 is correspondingly provided with the first positioning post 19. A second positioning groove 42 is provided on one end of the collimating lens 4 along the second direction, and the second positioning groove 42 is correspondingly provided with the first positioning post 19. A third support structure 43 is provided at each of the four edges of the end face of the collimating lens 4 near the second opening end 103 of the outer casing 1. Each third support structure 43 extends along the first direction from the collimating lens 4. The straight lens 4 extends towards the second opening end 103, and two third support structures 43 arranged opposite each other along the second direction are respectively provided with a third positioning post 44; the lamp plate 6 is provided with two third positioning grooves 61, each of which is respectively provided with two third positioning posts 44; the heat sink 7 is provided with two first positioning grooves 71, each of which is respectively provided with a first positioning post 19 and a second positioning post 10; the heat sink 7 is provided with two second positioning grooves 72, each of which is respectively provided with two third positioning posts 44; the heat sink 7 is provided with multiple second threaded mounting holes 73, each of which is respectively provided with multiple first threaded mounting holes 104; and multiple abutment fixing blocks 74 are provided on the end face of the heat sink 7 near the outer shell 1. When the mounting bracket 5, collimating lens 4, and lamp plate 6 are assembled inside the housing 1, and the heat sink 7 is assembled on the housing 1, the first positioning post 19 is sequentially inserted into the first positioning groove 501 of the mounting bracket 5 and the second positioning groove 42 of the collimating lens 4 to achieve the positioning and installation of the mounting bracket 5 and the collimating lens 4. The lamp plate 6 is positioned and installed by inserting it into the corresponding third positioning post 44 through two third positioning grooves 61. The end face of the lamp plate 6 away from the second opening end 103 abuts against the four third support structures 43. The heat sink 7 is positioned and installed by abutting against the two first positioning grooves 71 through the first positioning post 19 and the second positioning post 10, and by abutting against the two second positioning grooves 72 through the two third positioning posts 44. The heat sink 7 is fixed and installed on the housing 1 by passing through the second threaded mounting hole 73 and the first threaded mounting hole 104 through multiple screws 9, and abutting and fixing blocks 74 abut against and fix the end face of the lamp plate 6 near the second opening end 103. Thus, through the corresponding settings on the first positioning post 19, the second positioning post 10, the fixing frame 5, the collimating lens 4, the lamp board 6, the heat sink 7, and the outer shell 1, precise positioning is achieved.

[0075] In the specific implementation process, an external interface 62 is provided at one corner of the lamp board 6, and an interface groove 105 corresponding to the external interface 62 is provided on the outer shell 1. The external interface 62 is exposed outside the outer shell 1 through the interface groove 105 to facilitate the interface connection of the lamp board 6. Furthermore, the number of screws 9 can be set to four, which can be used to fix the heat sink 7 at the four corners of the outer shell 1. In addition, the height of the abutting fixing block 74 is 0.8mm, and the design gap between the inner surface of the heat sink 7 and the outer surface of the outer shell 1 after assembly is 0.3mm. This gap can be used to accommodate the cumulative height error of the shaping lens 3, collimating lens 4, fixing bracket 5, and lamp board 6 after stacking.

[0076] The above describes the various components of the image generation unit provided in the embodiments of this application and their connection relationships. The following section, in conjunction with... Figure 1 – Figure 14 As shown, the complete assembly process of the image generation unit is described in detail.

[0077] In this embodiment, the display screen 2 and the diffusion film are mounted on the display receiving plate 11. The display screen 2 and the diffusion film are positioned and installed in the second direction by the first film positioning structure 13 and the second film positioning structure. The display screen 2 and the diffusion film are fixed at one end in the third direction by the limiting and fixing structure 14. Then, the display screen 2 and the diffusion film are pressed and fixed at the other end in the third direction by two first pressing structures 15. Afterwards, the upper cover 8 is fastened to the first opening end 101 of the outer shell 1 by the snap-fit ​​structure (i.e., the snap-fit ​​block 12 and the snap-fit ​​groove 82). The second pressing structure 83 and each third pressing structure 84 on the upper cover 8 abut and fix the display screen 2. During this process, each abutting structure 85 abuts and fixes itself to its corresponding first film positioning structure 13 or limiting and fixing structure 14, thereby limiting and fixing the display screen 2 and the diffusion film in the first direction. In this way, the snap-fit ​​structure achieves precise positioning and installation of the display screen 2 and the diffusion film on the outer shell 1.

[0078] Then, the shaping lens 3 is held by two gripper structures 33 and placed into the hollow cavity 102 of the outer shell 1 from the second opening end 103 of the outer shell 1. During this process, the two ends formed by the rectangular opening 311 are inserted into the two support positioning grooves 106, and are inserted into the first limiting groove 34 through the limiting structure 18, so as to achieve precise positioning and installation of the shaping lens 3 in the outer shell 1. Subsequently, the limiting structure 18 is inserted into the second limiting groove 57, and the fixing block 503 is inserted into the support positioning groove 106. The first positioning post 19 is inserted into the first positioning groove 501, and the fixing frame 5 is positioned and installed in the outer shell 1. After it is assembled in place, each first fixing abutment part 56 abuts against the end face of each second support structure 32 along the first direction close to the plane of the shaping lens 3, and each second fixing abutment part 59 abuts against the end face of each first support structure 31 along the first direction close to the plane of the shaping lens 3. Thus, the fixing frame 5 achieves the abutment and fixation of the shaping lens 3 in the outer shell 1 along the first direction. Each first pressing rib 50 abuts against its corresponding gripper structure 33 to achieve precise positioning and fixation of the shaping lens 3 in the second direction. At the same time, the second pressing rib 502 abuts against its corresponding limiting structure 18 to achieve precise positioning and fixation of the fixing frame 5 in the second direction. Next, the collimating lens 4 is inserted into the second positioning groove 42 via the first positioning post 19, and then into the third limiting groove 41 via the limiting structure 18, achieving precise positioning of the collimating lens 4 within the housing 1. Afterwards, the lamp plate 6 is positioned and assembled into the hollow cavity 102 of the housing 1 via the third positioning post 44 inserted into the third positioning groove 61. At this point, the end face of the lamp plate 6 away from the second opening end 103 abuts against the four third support structures 43. After assembly, thermally conductive adhesive is applied to the lamp plate 6. Then, the heat sink 7 is positioned precisely at the second opening end 103 of the outer shell 1 by the first positioning post 19 and the second positioning post 10 abutting and positioning it in the two first positioning grooves 71, and by the two third positioning posts 44 abutting and positioning it in the two second positioning grooves 72. Finally, the heat sink 7 is fixedly installed on the outer shell 1 by passing four screws 9 through the second threaded mounting holes 73 and the first threaded mounting holes 104 in sequence. At this time, multiple abutting and fixing blocks 74 abut and fix the end face of the lamp plate 6 near the second opening end 103. That is, the lamp plate 6, collimating lens 4, fixing bracket 5 and shaping lens 3 are pressed into place by the abutting and fixing blocks 74, and then the shaping lens 3, fixing bracket 5, collimating lens 4, lamp plate 6 and heat sink 7 abut against each other. The precise positioning and installation of the shaping lens 3, collimating lens 4, fixing bracket 5, lamp plate 6 and heat sink 7 on the outer shell 1 can be achieved by only four screws 9 outside the outer shell 1.

[0079] This application also discloses a head-up display, including an image generation unit. The image generation unit is the same as the image generation unit provided in the above embodiments, and its structure and principle are the same as those in the foregoing embodiments. For the sake of brevity, it will not be repeated here. Please refer to the corresponding content in the above-mentioned image generation unit embodiments.

[0080] In summary, this application discloses an image generation unit and a head-up display (HUD). Through a snap-fit ​​connection between the top cover and the outer casing, the display screen and diffuser film are fixed to the outer casing without screws. Furthermore, the specific structural design of the top cover and outer casing allows for precise positioning and installation of the display screen and diffuser film on the outer casing. Simultaneously, by utilizing the mutual abutment between the shaping lens, the fixing bracket, the collimating lens, the lamp board, and the heat sink within the outer casing, and by threading the heat sink to the outside of the outer casing, the shaping lens, the collimating lens, the fixing bracket, and the lamp board can be fixed to the outer casing using only four external screws. The specific structural design of the shaping lens, the collimating lens, the fixing bracket, the lamp board, the heat sink, and the outer casing allows for precise positioning and installation of each component on the outer casing, facilitating assembly and ensuring reliable positioning and fixing. This solves the problems of difficult assembly of the shaping lens and low reliability of positioning and fixing of the collimating lens, the shaping lens, the lamp board, and the heat sink when stacked in existing independent PGU solutions.

[0081] It will be understood by those skilled in the art that the accompanying drawings are merely schematic diagrams of one embodiment, and the components shown in the drawings are not necessarily essential for implementing this invention. It should also be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0082] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 utility model based on the specific circumstances. Furthermore, in the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component 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 this utility model.

[0083] Finally, it should be noted that the above-described embodiments are merely specific implementations of this utility model, used to illustrate the technical solution of this utility model, and not to limit it. The protection scope of this utility model is not limited thereto. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this utility model. These modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope described in the claims.

Claims

1. An image generation unit, characterized in that, include: The outer casing is hollow inside and has openings at both ends along a first direction; The display screen is fixedly disposed at the first opening end of the housing along the first direction, and a diffusion film is disposed on the end face of the display screen facing the housing; Both the shaping lens and the collimating lens are disposed within the hollow cavity of the housing, with the shaping lens located on the side of the hollow cavity near the first opening end and the collimating lens located on the side of the hollow cavity near the second opening end of the housing along the first direction. The principal optical axis of the shaping lens coincides with the principal optical axis of the collimating lens. A fixing frame is disposed within the hollow cavity and located between the shaping lens and the collimating lens. The fixing frame is used for limiting and fixing the shaping lens and the collimating lens. The lamp panel is fixedly disposed in the hollow cavity and located at the second opening end; A heat sink is mounted on the housing to seal the second opening end, and the heat sink is thermally connected to the lamp panel. The first direction is the direction of the principal optical axis of the shaping lens.

2. The image generation unit according to claim 1, characterized in that, Also includes: The top cover is a cover plate structure with a central opening, and at least one connecting part is symmetrically arranged on the opposite two end faces of the top cover along the second direction. Each connecting part extends from the top cover toward the outer shell along the first direction, and each connecting part is provided with a slot. A display receiving plate is provided on the four inner walls of the outer casing. The display receiving plate is located on one side of the first opening end and extends inward from the four inner walls in a direction perpendicular to the four inner walls. The edges of the display screen and the diffusion film are provided on the display receiving plate. At least one locking block is provided on each of the opposite sides of the outer casing along the second direction. The position of each locking block corresponds one-to-one with the position of the plurality of locking slots. When each of the card blocks is respectively engaged in the corresponding card slot, and the top cover is fixedly engaged in the first opening end of the outer shell, the top cover abuts and fixes the display screen and the diffusion film to the display support plate. The second direction is perpendicular to the first direction.

3. The image generation unit according to claim 2, characterized in that, At least one first film positioning structure is provided on the inner two walls of the outer shell along the second direction, and multiple first film positioning structures are located on the side of the display receiving plate near the first opening end. At least one second film positioning structure is provided on the opposite ends of the diffusion film along the second direction, and each second film positioning structure is respectively provided in one-to-one correspondence with multiple first film positioning structures. By cooperating with each first film positioning structure and its corresponding second film positioning structure, the display screen and the diffusion film are positioned and installed on the display receiving plate, and the display screen and the diffusion film are limited and fixed in the second direction and the third direction. Wherein, the third direction, the second direction, and the first direction are mutually perpendicular, and the plane where the display screen is located is set at an acute angle to the plane formed by the third direction and the second direction.

4. The image generation unit according to claim 3, characterized in that, At least one limiting and fixing structure is provided on the high side inner wall of the first opening end of the housing along the third direction, and two first pressing structures are provided on the low side of the first opening end of the housing along the third direction. Each of the first pressing structures is a deformable elastic structure in the third direction. When the display screen and the diffusion film are assembled into the housing, one end of the display screen and the diffusion film along the third direction is limited and fixed by the limiting and fixing structure, and the other end of the display screen and the diffusion film along the third direction is elastically pressed and fixed by the two first pressing structures, so that the display screen and the diffusion film are limited and fixed in the third direction. The upper cover is provided with a second pressing structure at one end near the limiting and fixing structure along the third direction, and two third pressing structures at one end near the first pressing structure along the third direction. The second pressing structure and each of the third pressing structures are elastic structures that can deform in a direction perpendicular to the display support plate. The upper cover is provided with multiple abutting structures on the end face near the outer shell, and each abutting structure is respectively provided with multiple first film positioning structures and limiting and fixing structures. When the display screen and the diffusion film are assembled onto the housing via the top cover, the display screen is elastically pressed and fixed along a direction perpendicular to the display support plate by one second pressing structure and two third pressing structures. At the same time, each abutting structure abuts and is fixed to its corresponding first film positioning structure or limiting fixing structure, so that the top cover, the display screen, and the diffusion film are limited and fixed in a direction perpendicular to the display support plate.

5. The image generation unit according to claim 3, characterized in that, The hollow cavity of the outer shell is provided with support and fixing structures on the two inner walls along the third direction, and each support and fixing structure is located close to the first opening end. The end faces of all the support and fixing structures near the second opening end along the first direction are on the same horizontal plane. The hollow cavity of the outer shell is provided with a support and fixing groove on the two inner walls along the second direction, and each support and fixing groove is provided with a limiting structure. The shaping lens has a first support structure on each of its two opposite sides along the third direction, and each first support structure is corresponding to one of the multiple support fixing structures. The shaping lens has a second support structure on each of its two opposite sides along the second direction, and each second support structure is corresponding to one of the multiple support fixing grooves. The first support structure and the second support structure are both located on one side of the plane of the shaping lens. Each second support structure has a gripper structure on its end face away from the concave surface of the shaping lens. Each gripper structure extends from the end face of the second support structure away from the plane of the shaping lens in the first direction. Each second support structure has a first limiting groove. When the shaping lens and the fixing frame are assembled inside the housing, the end face of each first support structure approaching the concave surface of the shaping lens along the first direction abuts against the corresponding support fixing structure, and the end face of each second support structure approaching the concave surface of the shaping lens along the first direction abuts against the corresponding support fixing groove. Each limiting structure is positioned and inserted into its corresponding first limiting groove. Simultaneously, the fixing frame abuts against the end face of each first support structure approaching the plane of the shaping lens along the first direction, and against the end face of each second support structure approaching the plane of the shaping lens along the first direction, thereby fixing the shaping lens within the housing. Both gripper structures are inserted into the fixing frame.

6. The image generation unit according to claim 5, characterized in that, Each of the second support structures is disposed upward toward one of the first support structures on the third side, and each of the first limiting grooves is disposed upward toward another of the first support structures on the third side.

7. The image generation unit according to claim 5, characterized in that, The mounting frame includes a first fixing wall, a second fixing wall, a third fixing wall, and a fourth fixing wall connected end-to-end. The first fixing wall and the third fixing wall are located at both ends of the mounting frame along the second direction, and the second fixing wall and the fourth fixing wall are located at both ends of the mounting frame along the third direction. A lens receiving plate is provided at one end of the first fixing wall, the second fixing wall, the third fixing wall, and the fourth fixing wall near the second opening end of the outer shell. The lens receiving plate extends outward from the mounting frame on the plane formed by the third direction and the second direction. The ends of the first fixing wall and the third fixing wall near the first opening end of the outer shell are respectively... A first fixed abutment is provided, each of which corresponds to one of a plurality of second support structures. A second limiting groove is provided on the outer side wall of both the first fixed wall and the fourth fixed wall, each of which corresponds to one of a plurality of limiting structures. A gripper fixing groove is provided on the inner side wall of both the first fixed wall and the fourth fixed wall, each of which corresponds to one of a plurality of gripper structures. A second fixed abutment is provided at one end of both the second fixed wall and the fourth fixed wall near the first opening end of the outer shell, each of which corresponds to one of a plurality of first support structures. The collimating lens is provided with a third limiting groove at each end along the second direction, and each third limiting groove is provided in a one-to-one correspondence with a plurality of limiting structures; When the shaping lens, the fixing frame, and the collimating lens are assembled inside the housing, each of the first fixed abutment portions abuts against the end face of each of the second support structures along the first direction near the plane of the shaping lens, and multiple limiting structures are respectively inserted into their corresponding second limiting grooves. Simultaneously, multiple gripper structures are respectively inserted into their corresponding gripper fixing grooves. Each of the second fixed abutment portions abuts against the end face of each of the first support structures along the first direction near the plane of the shaping lens, thus achieving the positioning and fixing of the fixing frame and the abutment fixing of the shaping lens within the housing. The collimating lens abuts against the end face of the lens receiving plate near the second opening end of the housing, and multiple limiting structures are respectively inserted into their corresponding third limiting grooves, thus achieving the positioning and fixing of the collimating lens and the abutment fixing of the collimating lens against the fixing frame within the housing.

8. The image generation unit according to claim 7, characterized in that, Each of the gripper fixing slots is provided with at least two first pressure-feed ribs. When the shaping lens and the fixing frame are assembled in the housing, each of the first pressure-feed ribs abuts against its corresponding gripper structure to limit and fix the shaping lens in the second direction. Each of the limiting structures is a three-tiered structure comprising a large-diameter portion, a medium-diameter portion, and a small-diameter portion. The second limiting groove is a three-tiered groove corresponding to the limiting structure, and a second pressure-feeding rib is provided in the medium-diameter groove of each second limiting groove. The end of each large-diameter portion near the first opening end is respectively positioned and inserted into the corresponding first limiting groove. The end of each large-diameter portion away from the first opening end, the end of each medium-diameter portion, and the end of each small-diameter portion away from the second opening end are respectively positioned and inserted into the corresponding second limiting groove. The end of each small-diameter portion near the second opening end is respectively positioned and inserted into the corresponding third limiting groove. Each second pressure-feeding rib abuts against its corresponding medium-diameter portion, thereby achieving limiting and fixing of the fixing frame in the second direction.

9. The image generation unit according to claim 1, characterized in that, A first positioning post is provided on the inner wall of one end of the outer casing along the second direction, and a second positioning post is provided on the outer wall of the other end of the outer casing along the second direction. Both the first positioning post and the second positioning post are located on the side of the outer casing along the first direction close to the second opening end, and a plurality of first threaded mounting holes are provided at the second opening end of the outer casing. The fixing frame is provided with a first positioning groove at one end along the second direction, and the first positioning groove is provided in correspondence with the first positioning post; The collimating lens is provided with a second positioning groove at one end along the second direction. The second positioning groove is provided in correspondence with the first positioning post. A third support structure is provided at each of the four edges of the end face of the collimating lens near the second opening end of the housing. Each third support structure extends from the collimating lens along the first direction toward the direction near the second opening end. A third positioning post is provided on each of the two third support structures that are arranged opposite to each other along the second direction. The lamp panel is provided with two third positioning slots, and each third positioning slot is respectively provided in one-to-one correspondence with the two third positioning posts; The heat sink is provided with two first positioning grooves, each of which corresponds to the first positioning post and the second positioning post respectively. The heat sink is provided with two second positioning grooves, each of which corresponds to the two third positioning posts respectively. The heat sink is provided with multiple second threaded mounting holes, each of which corresponds to multiple first threaded mounting holes respectively. In addition, multiple abutment fixing blocks are provided on the end face of the heat sink near the outer shell. When the mounting bracket, the collimating lens, and the lamp plate are assembled inside the housing, and the heat sink is assembled on the housing, the first positioning post is sequentially inserted into the first positioning groove of the mounting bracket and the second positioning groove of the collimating lens to achieve the positioning and installation of the mounting bracket and the collimating lens. The lamp plate is positioned and installed by being inserted into the corresponding third positioning post through the two third positioning grooves, and the end face of the lamp plate away from the second opening end abuts against the four third support structures. The heat sink is positioned and installed by the first positioning post and the second positioning post abutting against the two first positioning grooves, and by the two third positioning posts abutting against the two second positioning grooves. The heat sink is fixed and installed on the housing by multiple screws sequentially passing through the second threaded mounting hole and the first threaded mounting hole, and multiple abutting fixing blocks abut against and fix the end face of the lamp plate near the second opening end. The second direction is perpendicular to the first direction.

10. A heads-up display, characterized in that, include: The image generation unit according to any one of claims 1–9.

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