CN117192779A - Head-up display - Google Patents
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Abstract
The disclosure relates to the technical field of head-up display, in particular to a head-up display. The head-up display comprises a display chip and a support shell, wherein the display chip comprises a first display area and a second display area; the light guide cavity is arranged in the support shell and is communicated with the support shell, the light guide cavity is internally provided with a light isolation plate, the light isolation plate divides the light guide cavity into a first light guide cavity and a second light guide cavity, and the first light guide cavity and the second light guide cavity are communicated with the support shell; the display chip is arranged at one end of the light guide cavity, the first display area is opposite to the first light guide cavity, and the second display area is opposite to the second light guide cavity. The head-up display of the present disclosure is capable of dual-screen imaging.
Description
Technical Field
The disclosure relates to the technical field of head-up display, in particular to a head-up display.
Background
Head Up displays (Head Up displays), also known as heads Up Display systems, HUDs for short. The principle of the intelligent driving system is that important driving information such as speed per hour, navigation and the like is projected and imaged on a proper position of a windshield glass or other imaging screens through a designed light path so as to be watched by a driver, so that potential safety hazards caused by watching display information of an instrument or other driving auxiliary equipment by the driver with low head are avoided, and driving safety is improved. For the augmented reality head-up display, related information can be combined with environmental information such as roads, vehicles, pedestrians and the like, and related functions of an ADAS (Advanced Driving Assistance System ) are fused, so that cabin intellectualization is further promoted.
At present, most of head-up displays are displayed in a single picture, display information is limited, and when information needing to be displayed in a short distance such as a vehicle speed and information needing to be displayed in a long distance such as a navigation arrow are blended, the whole picture is inclined, so that a visual effect is poor.
It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
An object of the present disclosure is to provide a head-up display capable of implementing dual-screen imaging.
The head-up display of the present disclosure includes:
the display chip comprises a first display area and a second display area;
the light guide cavity is internally provided with a light isolation plate, the light isolation plate divides the light guide cavity into a first light guide cavity and a second light guide cavity, and the first light guide cavity and the second light guide cavity are communicated with the support shell;
the display chip is arranged at one end of the light guide cavity, the first display area is opposite to the first light guide cavity, and the second display area is opposite to the second light guide cavity.
In one exemplary embodiment of the present disclosure,
The display chip is used for emitting image light, and the thickness of one end of the light isolation plate, which is close to the display chip, is smaller than the thickness of one end of the light isolation plate, which is far away from the display chip.
In an exemplary embodiment of the disclosure, the display chip is a light-emitting lamp panel, the head-up display further includes a transmissive display screen, the transmissive display screen includes a first image area and a second image area, and the transmissive display screen is disposed at the other end of the light guiding cavity, so that the first image area and the first display area are respectively located at two opposite ends of the first light guiding cavity, and the second image area and the second display area are respectively located at two opposite ends of the second light guiding cavity.
In an exemplary embodiment of the present disclosure, a light emitting lamp panel includes a first lamp panel, a second lamp panel, a first lighting circuit, a second lighting circuit, and a control main board, a first display area is provided on the first lamp panel, a second display area is provided on the second lamp panel, the first lamp panel and the second lamp panel are separately provided, the first lamp panel is connected to the control main board through the first lighting circuit, and the second lamp panel is connected to the control main board through the second lighting circuit.
In an exemplary embodiment of the disclosure, the head-up display further includes a light shield, a light-blocking cavity penetrating the light shield is provided in the light shield, an extension plate is provided in the light-blocking cavity, the extension plate divides the light-blocking cavity into a first light-blocking cavity and a second light-blocking cavity, and the first light-blocking cavity and the second light-blocking cavity are both penetrated through the light shield;
The light-isolating cavity is arranged on one side of the transmission type display screen far away from the light-guiding cavity, the first light-isolating cavity is opposite to the first image area, and the second light-isolating cavity is opposite to the second image area.
In one exemplary embodiment of the present disclosure,
the thickness of the extension plate increases from the end close to the transmissive display screen to the end far from the transmissive display screen.
In an exemplary embodiment of the disclosure, the head-up display further includes a light homogenizing sheet, one end of the light shield, which is close to the support housing, is provided with a connection part, the connection part includes a connection plate extending in a direction from the first light blocking cavity to the second light blocking cavity, and the connection plates are arranged in pairs in a direction of opposite ends of the extension plate;
the connecting plate is provided with a sliding groove which is used for being matched with the transmission type display screen, the connecting plate is also provided with a plug hole for installing the light homogenizing sheet and a buckle which is used for being matched with the supporting shell, and the sliding groove, the plug hole and the buckle are sequentially arranged along the direction facing the supporting shell.
In one exemplary embodiment of the present disclosure,
the connecting plate is provided with a locating pin, one end of the light shield, which is close to the supporting shell, is also provided with a locating piece, and the locating piece is perpendicular to the connecting plate;
the outer wall of the support shell is provided with a first positioning groove and a second positioning groove, the first positioning groove is used for being matched with the positioning pin, and the second positioning groove is used for being matched with the positioning piece.
In one exemplary embodiment of the present disclosure,
the inner wall of the supporting shell used for forming the first light guide cavity and the second light guide cavity and the side wall of the light isolation plate are provided with extinction layers, and the extinction layers are used for absorbing light projected to the extinction layers.
In an exemplary embodiment of the present disclosure, a head-up display includes a light source assembly including a light source bracket, a fly-eye lens, a light modulation plate, and a heat dissipation module, wherein the fly-eye lens, the light modulation plate, the light emitting lamp plate, and the heat dissipation module are sequentially stacked and mounted on the light source bracket, and the light source bracket is mounted on one end of a light guide cavity.
In an exemplary embodiment of the present disclosure, the head-up display further includes:
the first reflector is positioned on the side wall of the first light guide cavity along the extending direction of the light isolation plate and is opposite to the first light guide cavity, and the first reflector is used for reflecting light rays emitted from the first display area;
the second reflector is located opposite to the second light guide cavity along the extending direction of the side wall of the second light guide cavity along the light isolation plate, and is used for reflecting light rays emitted from the second display area.
In one exemplary embodiment of the present disclosure, the head-up display further includes a third mirror, the first mirror and the second mirror being configured to reflect light to different positions of the third mirror, the third mirror being configured to reflect light to a projection medium outside the head-up display; wherein,
The light reflected by the first reflector does not intersect with the light reflected by the second reflector, and the light does not form a crossed light path in the process of being transmitted to the projection medium by the display chip.
In an exemplary embodiment of the present disclosure, the first mirror, the second mirror, and the third mirror are convex mirrors for reflecting the light rays to the projection medium in a stepwise expanding manner.
The display chip is designed in a partitioning mode, the display chip comprises a first display area and a second display area, the supporting shell is also designed in a partitioning mode, the light guide cavity is divided into a first light guide cavity and a second light guide cavity which are not interfered with each other through the light isolation plate, when light rays are emitted from the display chip, the first display area and the second display area can emit the light rays respectively and independently, the two groups of light rays are transmitted in the first light guide cavity and the second light guide cavity respectively and independently, the two groups of light rays cannot be mutually mixed and mutually influenced, and meanwhile, the side wall of the light guide cavity can also block the influence of stray light formed inside the incidence of external sunlight on the two groups of light rays. Therefore, the head-up display can enable two groups of light rays to be emitted from different areas of the light emitting surface of the same display chip and to be transmitted in a mutually isolated manner, so that double-picture display can be realized. In addition, the head-up display disclosed by the invention does not need to adopt two independent projection lenses, so that the head-up display has the beneficial effects of reliable structure, small volume and low cost.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.
For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may have different arrangements as known in the art. Furthermore, in the drawings, like reference numerals designate identical or similar parts throughout the several views. Wherein:
FIG. 1 is a schematic light path diagram of an exemplary embodiment of a heads-up display of the present disclosure;
FIG. 2 is a schematic diagram of an exemplary embodiment of a heads-up display of the present disclosure;
FIG. 3 is a partial schematic view of a support housing in an exemplary embodiment of a head-up display of the present disclosure;
FIG. 4 is a schematic diagram illustrating the disassembly of a light shield, a transmissive display screen, and a light homogenizing sheet in an exemplary embodiment of a head-up display of the present disclosure;
FIG. 5 is a schematic view of a light shield in an exemplary embodiment of a heads-up display of the present disclosure;
FIG. 6 is a schematic diagram of a light shield in an exemplary embodiment of a heads-up display of the present disclosure;
FIG. 7 is a schematic view of a light shield in an exemplary embodiment of a heads-up display of the present disclosure;
FIG. 8 is a schematic diagram of a light homogenizing sheet in an exemplary embodiment of a head-up display of the present disclosure;
FIG. 9 is a schematic diagram of a transmissive display screen in an exemplary embodiment of a heads-up display of the present disclosure;
FIG. 10 is a schematic diagram of a circuit configuration of a transmissive display panel and a display chip in an exemplary embodiment of a head-up display of the present disclosure;
FIG. 11 is a schematic view of a light source assembly in an exemplary embodiment of a head-up display of the present disclosure;
FIG. 12 is a schematic view of a light source assembly in an exemplary embodiment of a head-up display of the present disclosure;
FIG. 13 is a schematic view of a light source stand in an exemplary embodiment of a head-up display of the present disclosure;
FIG. 14 is a schematic view of a light emitting surface of a light modulating plate in an exemplary embodiment of a head-up display of the present disclosure;
FIG. 15 is a schematic view of a light entrance surface of a light modulating plate in an exemplary embodiment of a head-up display of the present disclosure;
FIG. 16 is a schematic view of a fly-eye lens in an exemplary embodiment of a heads-up display of the present disclosure;
FIG. 17 is a schematic view of a light emitting light panel in an exemplary embodiment of a heads-up display of the present disclosure;
FIG. 18 is a schematic diagram of a heatsink slug in an exemplary embodiment of a head-up display of the present disclosure;
fig. 19 is a schematic diagram of another view of a support housing in an exemplary embodiment of a head-up display of the present disclosure.
The reference numerals are explained as follows:
10. a display chip; 11. a first display area; 12. a second display area; 13. a first lighting circuit; 14. a second lighting circuit; 15. a control main board; 151. a display screen interface; 152. a main control chip; 153. externally connecting a wire harness; 16. a first lamp panel; 17. a second lamp panel; 20. a support housing; 200. a light guiding cavity; 21. a light-blocking plate; 201. a first light guide cavity; 202. a second light guide cavity; 22. a clamping block; 23. a first positioning groove; 24. a second positioning groove; 25. a connecting groove; 30. a transmissive display screen; 31. a first image area; 32. a second image area; 33. an outer frame; 34. a non-display separator bar; 40. a light shield; 400. a light blocking cavity; 401. a first light blocking cavity; 402. a second light blocking cavity; 41. an extension plate; 42. a connecting plate; 421. a chute; 422. a limit part; 423. a plug hole; 424. a buckle; 425. a positioning pin; 43. a positioning sheet; 50. a light homogenizing sheet; 61. a light source support; 611. an illumination partition plate; 612. a first illumination cavity; 613. a second illumination cavity; 614. a support column; 615. a clamping part; 616. a connecting block; 62. a fly-eye lens; 63. a light modulating plate; 631. reinforcing ribs; 64. a heat dissipation module; 641. a thermal pad; 642. a heat dissipation block; 643. a limit rib;
71. A first mirror; 72. a second mirror; 8. a third mirror; 9. a windshield.
Detailed Description
The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is therefore to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.
Unless otherwise defined or stated, technical or scientific terms used in this disclosure should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The present disclosure uses "first" and "second" etc. as labels only and does not limit the number or importance, order, or order of their objects. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items.
Further, in the description of the present disclosure, it should be understood that the terms of "upper", "lower", "inner", "outer", and the like described in the exemplary embodiments of the present disclosure are merely used to indicate relative positional relationships. For convenience, the description is made in terms of the position and state of the head-up display when actually operating, or the angles shown in the drawings, and should not be construed as limiting the example embodiments of the present disclosure. It will be appreciated by those skilled in the art that when the absolute position of the object to be described is changed, the relative positional relationship may be changed accordingly, for example, when the structure in the exemplary embodiment of the present disclosure is rotated or the direction and viewing angle of the observation are changed, the "upper" may be changed to the "lower" or the "left" or the "right", and such change does not obstruct the understanding of those skilled in the art.
In addition, the present disclosure describes an optical surface that is "concave" or "convex" with respect to the direction of light incident on that surface. For example, an optical surface is "concave" in that a point on the incident light beam is farther from the center of the surface on the optical axis than the point is from the periphery of the surface.
For convenience in describing the solution of the present disclosure, a possible application scenario provided by the present disclosure is that the head-up display is applied to an automobile, and those skilled in the art should understand that the head-up display of the exemplary embodiment of the present disclosure may also be applied to, for example, sanitation vehicles, fire-fighting vehicles, military vehicles, and of course, may also be applied to the fields of ships, aviation, and the like. For example, can be applied to aircrafts such as fighters, so that a driver can track and aim objects based on the assistance of a head-up display.
Head-up displays typically form a virtual image of a target that is viewable within the field of the eye-box in front of the driver by transmitting image light onto a projection medium, such as a specially-made screen in front of the driver, or directly reflecting the image light into the appropriate location of the front windshield of the vehicle, where the light reflected by the projection medium enters the field of the eye-box. In the exemplary embodiment of the present disclosure, a windshield 9 is described as an example of a projection medium that ultimately reflects image light to the human eye.
The virtual image distance (Virtual Image Distance, VID) refers to the distance between the center of the eye box and the center of the virtual image of the object generated by the heads-up display. Currently, the mainstream heads-up display includes a windscreen-head-up display (W-HUD) and an augmented reality head-up display (Augmented Reality-HUD, AR-HUD).
Among them, the windshield type head-up display is also called a front head-up display. In general, the virtual image distance of the windshield type head-up display is 2m to 3m, and when the windshield type head-up display is installed on an automobile, the display position is above the edge of the engine cover, so that a real scene in front of the automobile is avoided, shielding is avoided, and the windshield type head-up display has high safety.
The augmented reality head-up display can be combined with an advanced driving auxiliary system, virtual information such as navigation is overlapped on a real road surface, and virtual-real combination is achieved. At shorter virtual image distances, slight movements of the driver's head may result in strong parallax such that the target virtual image is greatly displaced from the real world. Therefore, when the projection of navigation information and other images which are required to be fused with the real scene, the virtual image distance is usually 7.5m or more, even 10 m-15 m, for better fitting of the target virtual image and the real scene.
At present, most of head-up displays are displayed on a single screen, however, for good display effects, information such as vehicle states and vehicle speeds need to be displayed in a short distance, information such as navigation arrows and road condition prompts, which need to be fused with real scenes, needs to be displayed in a long distance, and if the two information are blended, the whole screen is inclined, so that the visual effect is poor. Therefore, in order to enhance the display effect, it is necessary to design a head-up display capable of implementing a dual-screen or multi-screen display, which projects an image into two or more different screens. For example, an image is projected onto two pictures with different virtual image distances, a picture with a shorter virtual image distance is displayed as a close view, information such as vehicle speed and mileage can be displayed, and a picture with a longer virtual image distance is displayed as a distant view, and information such as navigation guidance and tangential guidance can be displayed.
In the technology known by the inventor, in order to realize double-picture display, two image generation units (Picture Generation Unit, PGU) are needed, each of which adopts independent projection lenses and is arranged in a partitioned mode to project respectively, however, the scheme easily causes that the HUD packaging volume is too large, the arrangement on the whole vehicle is not facilitated, and the cost is difficult to control.
In view of the above, the present disclosure provides a head-up display capable of implementing dual-screen imaging. The head-up display of the present disclosure is described in detail below with reference to fig. 1 to 19.
According to a first aspect of the present disclosure, there is provided a head-up display, as shown with reference to fig. 1 to 3, including a display chip 10 and a support case 20, the display chip 10 including a first display region 11 and a second display region 12; the support housing 20 is internally provided with a light guide cavity 200 penetrating the support housing 20, the light guide cavity 200 is internally provided with a light isolation plate 21, the light isolation plate 21 divides the light guide cavity 200 into a first light guide cavity 201 and a second light guide cavity 202, and the first light guide cavity 201 and the second light guide cavity 202 penetrate the support housing 20. The display chip 10 is disposed at one end of the light guiding cavity 200, and the first display area 11 is opposite to the first light guiding cavity 201, and the second display area 12 is opposite to the second light guiding cavity 202.
The present disclosure relates to a partition design of a display chip 10, such that the display chip 10 includes a first display area 11 and a second display area 12, and the support housing 20 is also designed in a partition manner, the light guide cavity 200 is divided into a first light guide cavity 201 and a second light guide cavity 202 that do not interfere with each other by a light isolation plate 21, when light is emitted from the display chip 10, the first display area 11 and the second display area 12 can emit light independently, and the two groups of light can propagate independently in the first light guide cavity 201 and the second light guide cavity 202 without being mixed with each other and affecting each other, and meanwhile, the side wall of the light guide cavity 200 can also block the influence of stray light formed inside the incident external sunlight on the two groups of light.
After passing through the light guide cavity 200, the two groups of light rays can be turned and adjusted by a reflector group formed by a plurality of reflectors and reflected outside the head-up display. For example, the first reflecting mirror 71 is located opposite to the first light guiding cavity 201 along the extending direction of the sidewall of the light shielding plate 21 in the first light guiding cavity 201, and is used for reflecting the light emitted from the first display area 11; the second reflecting mirror 72 is located opposite to the second light guiding cavity 202 along the extending direction of the sidewall of the light shielding plate 21, and is used for reflecting the light emitted from the second display area 12. In some exemplary embodiments, the first mirror 71 and the second mirror 72 may directly reflect two sets of image light rays out of the head-up display for imaging. In other exemplary embodiments, the head-up display further includes a third mirror 8, the third mirror 8 being opposite to each of the first mirror 71 and the second mirror 72, the first mirror 71 and the second mirror 72 being configured to reflect the image light to different positions of the third mirror 8, and the third mirror 8 being configured to reflect the two sets of image light out of the head-up display for imaging. The first, second, and third mirrors 71, 72, and 8 may each change the propagation path of the image light in the horizontal plane and the vertical plane, respectively, and part or all of the first, second, and third mirrors 71, 72, and 8 may change the size of the target virtual image in one direction or a plurality of directions. The head-up display of the present disclosure may enable two groups of light to exit from different areas of the light exit surface of the same display chip 10 and be transmitted separately from each other, thereby realizing dual-screen display. In addition, the head-up display disclosed by the invention does not need to adopt two independent projection lenses, so that the head-up display has the beneficial effects of reliable structure, small volume and low cost.
Illustratively, referring to FIG. 1, a first mirror 71 is used to reflect near image light and a second mirror 72 is used to reflect far image light; the near image light is reflected by the first mirror 71 to the side of the third mirror 8 away from the display chip, and the far image light is reflected by the second mirror 72 to the side of the third mirror 8 close to the display chip. In some exemplary embodiments of the present disclosure, no intersection of the light paths occurs between the near image light and the far image light during propagation from the display chip 10 to the windshield 9. That is, the close-range image light does not intersect, the distant-range image light does not intersect, and the close-range image light and the distant-range image light do not intersect.
Specifically, for example, the first mirror 71, the second mirror 72, and the third mirror 8 are convex mirrors, so that the image light is reflected to the windshield 9 in a step-by-step and expanding manner, and a dual-screen imaging effect is achieved. In the process that the near image light is reflected to the third reflecting mirror 8 through the first reflecting mirror 71 and is reflected to the windshield 9 through the third reflecting mirror 8, the divergence angle of the image light is gradually increased, so that the image light corresponding to each pixel point does not cross in the transmission process, the far image light is the same, and the image light corresponding to each pixel point does not cross in the transmission process. Meanwhile, the near-view image light and the far-view image light are projected on different positions of the reflecting surface of the third reflecting mirror 8, and do not intersect each other in the process from the first reflecting mirror 71 and the second reflecting mirror 72 to the third reflecting mirror 8 and in the process of being reflected to the windshield 9 by the third reflecting mirror 8.
For another example, the first mirror 71 and the second mirror 72 may be plane mirrors, which are used only to turn the propagation direction of the light, and the third mirror 8 may be a convex mirror with a free-form surface, which is used to reflect and emit the image light. In the process that the near image light is reflected to the third reflector 8 through the first reflector 71 and is reflected to the windshield 9 through the third reflector 8, the divergence angle of the image light is unchanged, so that the image light corresponding to each pixel point does not cross in the transmission process, the far image light is the same, and the image light corresponding to each pixel point does not cross in the transmission process. Meanwhile, the near-view image light and the far-view image light are projected on different positions of the reflecting surface of the third reflecting mirror 8, and do not intersect each other in the process from the first reflecting mirror 71 and the second reflecting mirror 72 to the third reflecting mirror 8 and in the process of being reflected to the windshield 9 by the third reflecting mirror 8.
For another example, the first mirror 71 and the second mirror 72 are both plane mirrors, and the third mirror 8 is a concave mirror with a free curved surface for reflecting and converging the image light. By controlling the surface shape of the third reflecting mirror 8, the near-view image light and the far-view image light do not cross each other in the process of being reflected to the windshield 9 by the third reflecting mirror 8.
Alternatively, the first mirror 71 and the second mirror 72 are both convex mirrors, and the third mirror 8 is a concave mirror with a free-form surface, or the like. In the exemplary embodiment of the present disclosure, the surface shapes of the first, second and third mirrors 71, 72 and 8 may take various forms as long as the crossing of the optical paths does not occur, so that the integrity of the optical information in the optical paths can be ensured.
In other exemplary embodiments, the near image light and the far image light may intersect the light path during propagation from the display chip 10 to the windshield 9. In the present exemplary embodiment, the image light may be preprocessed before the image light is incident on the first mirror 71 and the second mirror 72, for example, the image light emitted from the first display area 11 may include part of the near-view image information and part of the far-view image information; the image light emitted by the second display area 12 is the same as the image light, and comprises part of near view image information and part of distant view image information; when the two sets of image light rays are reflected from the first mirror 71 and the second mirror 72 to the reflecting surface of the third mirror 8, respectively, the two sets of image light rays partially overlap at the reflecting surface of the third mirror 8 and are reflected to the inner side surface of the windshield 9 via the third mirror 8 to form an image. In the present exemplary embodiment, by preprocessing the image light, it is possible to avoid incomplete near-view images or distant-view images due to optical information loss, so that a dual-screen imaging effect can be formed, and overlapping display of partial areas of the dual-screen can be realized according to display requirements.
Note that the exemplary embodiments of the present disclosure are described only with a two-screen display as an example. In other embodiments of the head-up display of the present disclosure, the display chip 10 may also have more display areas, for example, including a third display area, and accordingly, two light-blocking plates 21 may be disposed in the light-guiding cavity 200 to divide the light-guiding cavity 200 into a first light-guiding cavity 201, a second light-guiding cavity 202 and a third light-guiding cavity, where the first light-guiding cavity 201, the second light-guiding cavity 202 and the third light-guiding cavity correspond to the first display area 11, the second display area 12 and the third display area, respectively. The light rays emitted from the display chips 10 can be propagated in isolation from each other. The head up display mirror assembly may also include more mirrors to turn the image light three or more times. In an exemplary embodiment of the present disclosure, the display chip 10 may be used to emit image light, or the display chip 10 may be used to emit illumination light, and convert the illumination light into image light in cooperation with the transmissive display panel 30. The image light may be preprocessed by preprocessing the outgoing image light on the surface of the display chip 10 or preprocessing the outgoing image light on the light outgoing surface of the transmissive display panel 30.
Further, in some exemplary embodiments, referring to fig. 2, the head up display further includes a bottom chassis for receiving and protecting the mirror group and providing mounting locations for the mirrors within the mirror group, and the support housing 20 may be integrally designed with the bottom chassis of the head up display. For example, one or more of the first, second and third mirrors 71, 72 and 8 may be mounted to the support housing 20. The display chip 10 is also mounted on the support housing 20, so that an optical machine housing of an image generating unit in a traditional scheme is omitted, the number of parts is simplified, and the assembly efficiency is improved. In addition, since the display chip 10 and the reflecting mirror of the reflecting mirror group can use the supporting housing 20 as the assembly reference, the assembly accuracy can be improved, and the imaging error of the whole head-up display optical system can be reduced.
In an exemplary embodiment, the display chip 10 is used for emitting image light, and specifically, the display chip 10 may be a display chip 10 such as a liquid crystal display (Liquid Crystal Display, LCD), a digital micromirror display (Digital Micromirror Display, DMD), a liquid crystal on silicon (Liquid Crystal on Silicon, LCoS) or a laser light scanning (laser beam scanning, LBS). The support housing 20 is located at the light emitting side of the display chip 10, and the first display area 11 and the second display area 12 emit image light rays respectively and independently, and the two groups of image light rays respectively and independently propagate in the first light guide cavity 201 and the second light guide cavity 202.
In another exemplary embodiment, referring to fig. 1 and 2, the display chip 10 is used for emitting illumination light, for example, the display chip 10 may be a light-emitting lamp panel. The head-up display further comprises a transmissive display panel 30, which may be a liquid crystal display panel, for example, the transmissive display panel 30 being adapted to convert illumination light into image light comprising image information. Referring to the transmissive display panel 30 shown in fig. 9, the transmissive display panel 30 includes a first image area 31 and a second image area 32, and the transmissive display panel 30 is disposed at the other end of the light guiding cavity 200, such that the first image area 31 and the first display area 11 are respectively located at two opposite ends of the first light guiding cavity 201, and the second image area 32 and the second display area 12 are respectively located at two opposite ends of the second light guiding cavity 202. When the head-up display works, the first display area 11 and the second display area 12 of the light-emitting lamp panel can respectively emit illumination light rays independently, and respectively and independently spread in the first light guide cavity 201 and the second light guide cavity 202, and respectively enter the first image area 31 and the second image area 32 of the transmission display screen 30 to form image light rays.
In the related art, the scheme of generating the image light by combining the light-emitting lamp panel and the transmissive display 30 has the advantages of mature technology and lower cost, however, in order to improve the uniformity of the illumination light and the imaging definition, the distance between the light-emitting lamp panel and the transmissive display 30 needs to be controlled, and when the light-emitting lamp panel is far away from the transmissive display 30, the imaging light brightness is insufficient; when the light-emitting lamp panel is too close to the transmissive display 30, the light emitted from the transmissive display 30 is uneven, and the display quality is poor. Therefore, in the related art, the optical engine housing of the image generating unit needs to satisfy the distance requirement between the light emitting lamp panel and the transmissive display panel 30, and after the image generating unit is mounted on the bottom chassis of the head up display, the longitudinal dimension of the head up display is easily difficult to control.
In some exemplary embodiments of the present disclosure, referring to fig. 1, the support housing 20 is integrally designed with the bottom case of the head-up display, and the spatial distance between the light-emitting lamp panel and the transmissive display 30 can be shared with the space inherent in the bottom case of the head-up display, without adding the space volume of the optical engine housing outside the bottom case of the head-up display, which significantly reduces the envelope volume of the entire head-up display, and facilitates the arrangement of the head-up display in a limited space.
In the present exemplary embodiment, since the transmissive display 30 includes the first image area 31 and the second image area 32, the light-emitting lamp panel performs the partition illumination on the first image area 31 and the second image area 32, so as to implement the display of two groups of different image light, and thus, the partition control on the light-emitting lamp panel and the transmissive display 30 can implement the independent display and the independent brightness adjustment of two pictures by using one light-emitting lamp panel and one transmissive display 30.
Specifically, referring to fig. 10, the first image area 31 and the second image area 32 may be made to display different images by a zoned design of the transmissive display panel 30. The control main board 15 is provided with a display screen interface 151, a main control chip 152 and an external wiring harness 153, and the control main board 15 can be connected to a whole vehicle controller of a vehicle through the external wiring harness 153. The transmissive display panel 30 is connected to the control main board 15 through a display panel interface 151. The first display area 11 and the second display area 12 of the light-emitting lamp panel can adopt mutually independent circuit designs, the first display area 11 is connected to the control main board 15 through the first lighting circuit 13, and the second display area 12 is connected to the control main board 15 through the second lighting circuit 14, so that the first display area 11 and the second display area 12 can independently control the lighting brightness, and the first image area 31 and the second image area 32 of the transmission type display screen 30 can be lightened to different degrees. When in use, a user can freely select any single-picture display or start double-picture display, and the display brightness of a certain image can be independently regulated, so that the personalized requirement is met.
In an exemplary embodiment of the present disclosure, referring to fig. 17 and 10, the light emitting lamp panel may be composed of two independent lamp panels, i.e., the first display area 11 and the second display area 12 are separately disposed. Specifically, the light-emitting lamp panel includes a first lamp panel 16, a second lamp panel 17, a first lighting circuit 13, a second lighting circuit 14 and a control main board 15, the first display area 11 is disposed on the first lamp panel 16, the second display area 12 is disposed on the second lamp panel 17, the first lamp panel 16 and the second lamp panel 17 are separated from each other, the first lamp panel 16 is connected to the control main board 15 through the first lighting circuit 13, and the second lamp panel 17 is connected to the control main board 15 through the second lighting circuit 14, so that the first lamp panel 16 and the second lamp panel 17 can independently control the lighting brightness. In addition, when one of the first lamp panel 16 and the second lamp panel 17 is damaged, only the damaged lamp panel can be removed and replaced, and the lamp panel with normal function is not affected.
Further, in an exemplary embodiment of the present disclosure, the head-up display further includes a light shield 40, referring to fig. 4 and 5, fig. 4 shows a schematic view of the light shield 40, the transmissive display screen 30 and the light homogenizing sheet 50 disassembled, and fig. 5 shows a schematic view of the light shield 40. The light shielding cover 40 is internally provided with a light shielding cavity 400 penetrating through the light shielding cover 40, the light shielding cavity 400 is internally provided with an extension plate 41, the extension plate 41 divides the light shielding cavity 400 into a first light shielding cavity 401 and a second light shielding cavity 402, and the first light shielding cavity 401 and the second light shielding cavity 402 penetrate through the light shielding cover 40. The light shield 40 is mounted on a side of the transmissive display panel 30 remote from the light guiding cavity 200 such that the first light blocking cavity 401 is opposite the first image area 31 and the second light blocking cavity 402 is opposite the second image area 32. The illumination light emitted from the display chip 10 propagates independently in the first light guide cavity 201 and the second light guide cavity 202, and is incident on the first image area 31 and the second image area 32 of the transmissive display panel 30 to form image light, and two different groups of image light can propagate independently in the first light blocking cavity 401 and the second light blocking cavity 402, and are emitted independently. For example, the first light blocking cavity 401 is opposite to the first mirror 71, and the first mirror 71 is configured to reflect the image light emitted from the first image area 31 of the transmissive display panel 30; the second light-blocking cavity 402 is opposite to the second display area 12, and the second display area 12 is configured to reflect the image light emitted from the second image area 32 of the transmissive display panel 30. The light shield 40 can isolate the two groups of light rays on one hand, and can further extend the protection range of the image light rays on the other hand, so as to avoid the influence of stray light formed in the incident outside sunlight on the two groups of light rays.
The transmissive display panel 30 may be mounted to the bottom of the light shield 40 and fixed between the light shield 40 and the support housing 20 through the connection of the light shield 40 and the support housing 20. For example, referring to fig. 5, one end of the light shield 40 near the support housing 20 is provided with a connection portion including connection plates 42 extending in the direction of the first light blocking chamber 401 to the second light blocking chamber 402, the connection plates 42 being disposed in pairs in the direction of opposite ends of the extension plate 41. Fig. 6 shows a schematic view of the light shield 40 in a section along the direction of the connection plate 42, and the connection plate 42 is provided with a sliding groove 421 for matching with the transmissive display panel 30. In an exemplary embodiment, referring to fig. 4, the transmissive display panel 30 includes an outer frame 33 surrounding the periphery, the thickness of the outer frame 33 is greater than the thicknesses of the first image area 31 and the second image area 32, and when the transmissive display panel 30 is mounted, the transmissive display panel 30 is slid laterally into the sliding groove 421, so that the outer frame 33 of the transmissive display panel 30 is in limit fit with the sliding groove 421, and a non-display separation bar 34 is disposed between the first image area 31 and the second image area 32, so that the transmissive display panel 30 is completely mounted in place, i.e., when the outer frame 33 at the front end of the transmissive display panel 30 abuts against the end of the sliding groove 421, the non-display separation bar 34 corresponds to the position of the extension plate 41. The starting end of the sliding groove 421 can be further provided with a limiting part 422, and after the assembly is in place, the limiting part 422 can limit the outer frame 33 of the transmission type display screen 30, so that the transmission type display screen 30 is prevented from sliding out of the sliding groove 421 in the reverse direction.
The head-up display may further include a light homogenizing sheet 50, and the connecting plate 42 is further provided with a plug hole 423 for installing the light homogenizing sheet 50. Referring to fig. 7, a schematic view of the light shield 40 is shown in a cut-away view along the direction of the extension plate 41, and the insertion holes 423 may be through holes formed in the connecting plate 42 to form the side walls of the sliding groove 421. During installation, the plugging pieces on two sides of the light homogenizing sheet 50 can be clamped into the plugging holes 423, so that the light homogenizing sheet 50 is arranged below the transmission type display screen 30, namely, in a direction close to the display chip 10. The plugging holes 423 may be symmetrically disposed on the two side connection plates 42. In another exemplary embodiment, the two side connection plates 42 are each provided with the insertion holes 423, and the insertion holes 423 on the two side connection plates 42 have different length dimensions in a direction perpendicular to the extension plate 41. Referring to the light homogenizing sheet 50 shown in fig. 8, the length dimensions of the plugging sheets at two sides of the light homogenizing sheet 50 are also different, and when in installation, the relatively long plugging sheets are matched with the relatively narrow plugging holes 423 so as to limit the length direction of the light homogenizing sheet 50, and the relatively short plugging sheets are matched with the relatively long plugging holes 423, so that the light homogenizing sheet 50 is convenient to install.
In an exemplary embodiment of the present disclosure, the connecting plate 42 is further provided with a buckle 424 for matching with the support housing 20, and the buckle 424 is disposed below the plugging hole 423, i.e., in a direction close to the display chip 10. The light shield 40 may be connected to the support housing 20 by a snap 424, for example, referring to a partial schematic view of the support housing 20 shown in fig. 3, an outer wall of the support housing 20 may be provided with a latch 22. Through the matching of the clamping blocks 22 on the outer wall of the support shell 20 and the clamping buckles 424 on the connecting plate 42 of the light shield 40, the connecting plate 42 can cover the outer wall of the support shell 20, the light homogenizing sheet 50 and the transmission type display screen 30 are clamped between the light shield 40 and the support shell 20, good sealing performance is achieved between the light shield 40 and the support shell 20, and light leakage between the light shield 40 and the support shell 20 is prevented.
Further, in an exemplary embodiment of the present disclosure, the connection plate 42 and the support housing 20 may be provided with a positioning structure, respectively. For example, the connecting plate 42 is provided with a positioning pin 425, one end of the light shield 40 near the supporting housing 20 is further provided with a positioning plate 43, the positioning plate 43 is perpendicular to the connecting plate 42, the outer wall of the supporting housing 20 is provided with a first positioning groove 23 and a second positioning groove 24, the first positioning groove 23 is used for being matched with the positioning pin 425, and the second positioning groove 24 is used for being matched with the positioning plate 43. The positioning pin 425 and the positioning piece 43 can limit the relative position relationship between the light shield 40 and the support shell 20 in two directions perpendicular to each other, so as to ensure that the first display area 11, the first light guide cavity 201, the first image area 31 and the first light isolation cavity 401 are aligned in the light emitting direction of the first display area 11; the second display area 12, the second light guiding cavity 202, the second image area 32 and the second light blocking cavity 402 are aligned in the light emitting direction of the second display area 12.
In one exemplary embodiment of the present disclosure, the thickness of the extension plate 41 increases from one end near the transmissive display panel 30 to one end far from the transmissive display panel 30. Referring to fig. 6, the inner wall of the first light blocking cavity 401 may be a funnel shape with a narrow bottom and a wide top, and the extending direction of the inner wall of the first light blocking cavity 401 is consistent with the angle of the image light rays exiting from the edge of the first image area 31. The second light-isolating cavity 402 is similar, the inner wall of the second light-isolating cavity 402 may be a funnel with a narrower bottom and a wider top, and the extending direction of the inner wall of the second light-isolating cavity 402 is consistent with the angle of the image light emitted from the edge of the second image area 32. That is, the extending directions of the inner walls of the first light blocking cavity 401 and the second light blocking cavity 402 may be matched with the emitting angle of the image light, so as to avoid affecting the emitting of the image light, resulting in the partial absence of the projected image.
Similarly, in one exemplary embodiment of the present disclosure, the thickness of the end of the light blocking plate 21 near the display chip 10 is smaller than the thickness of the end of the light blocking plate 21 far from the display chip 10. That is, the extending direction of the inner wall of the first light guiding cavity 201 is consistent with the angle of the light rays exiting from the edge of the first display area 11; the extending direction of the inner wall of the second light guiding cavity 202 is consistent with the angle of the light rays exiting from the edge of the second display area 12. The thickness of the light blocking plate 21 may be increased from an end close to the display chip 10 to an end far from the display chip 10. When the light shield 40 is mounted on the support housing 20, the light blocking plate 21 is aligned with the extension plate 41. Specifically, since the extending directions of the inner walls of the first light-blocking cavity 401 and the inner walls of the second light-blocking cavity 402 are matched with the emitting angle of the light at the bottom of the light-shielding cover 40, the extending directions of the inner walls of the first light-guiding cavity 201 and the inner walls of the second light-guiding cavity 202 are matched with the emitting angle of the light at the bottom of the supporting housing 20, the thickness of the end of the light-blocking plate 21 away from the display chip 10 and the thickness of the end of the extending plate 41 close to the supporting housing 20 can be equal, so that the light-blocking plate 21 and the extending plate 41 can be in smooth transition.
According to one exemplary embodiment described above, the display chip 10 may be used to emit image light, i.e., the display chip 10 may be integrated with illumination and imaging. In this exemplary embodiment, the image light may be directly emitted at the first display region 11 and the second display region 12 of the light emitting surface of the display chip 10. For example, for a solution employing digital light processing (Digital Light Processing, DLP) projection technology, the DMD chip may be directly partitioned to emit different image light rays. In this exemplary embodiment, the support case 20 may also be integrally formed with the bottom case of the head-up display, and will not be described again. For the exemplary embodiment in which the display chip 10 directly emits image light, the head-up display may also include a light shield 40, with the light blocking plate 21 aligned with the extension plate 41 and may transition smoothly. Unlike the aforementioned exemplary embodiment in which only the illumination light is emitted from the display chip 10 and the illumination light is converted into the image light by the transmissive display panel 30, the transmissive display panel 30 may not be disposed between the light shielding cover 40 and the support housing 20, and thus the light shielding cover 40 may not have the chute 421 structure. The connection and positioning between the light shield 40 and the support housing 20 may be the same as those of the foregoing exemplary embodiment, and will not be described herein.
Further, the light shield 40 and the support housing 20 can be integrally formed, so as to further reduce the number of parts and assembly difficulty. Therefore, the light blocking plate 21 and the extension plate 41 may be integrally formed.
In an exemplary embodiment of the present disclosure, the inner walls of the first light guiding cavity 201 and the second light guiding cavity 202 are provided with extinction layers, for example, coated with extinction paint, so as to avoid stray light with different reflection directions generated by light reflected by the inner walls of the first light guiding cavity 201 and the second light guiding cavity 202, which results in reduced display quality. Specifically, the extinction layer may be disposed on the inner wall of the support housing 20 and the side wall of the light-blocking plate 21 for forming the first and second light-guiding cavities 201 and 202. In an exemplary embodiment, the inner walls of the first light-insulating cavity 401 and the second light-insulating cavity 402 are also provided with extinction layers, for example, extinction paint is coated on the inner walls of the first light-insulating cavity 401 and the second light-insulating cavity 402, so as to avoid stray light with different reflection forming directions of light rays on the inner walls of the first light-insulating cavity 401 and the second light-insulating cavity 402, which results in degradation of display quality.
In one exemplary embodiment of the present disclosure, the display chip 10 is a light emitting lamp panel. The head-up display further comprises a light source assembly, the light source assembly comprises a light source support 61, a fly eye lens 62, a light modulation plate 63 and a heat dissipation module 64, wherein the fly eye lens 62, the light modulation plate 63, the light-emitting lamp panel and the heat dissipation module 64 are sequentially installed on the light source support 61 in a stacked mode, and the light source support 61 is installed at one end of the light guide cavity 200.
Specifically, referring to the exploded view of the parts of the light source assembly shown in fig. 11 and the schematic sectional view of the light source assembly shown in fig. 12 in the assembled state, the light source support 61 may include a first illumination cavity 612 and a second illumination cavity 613 that are divided by an illumination partition 611 and pass through, the fly-eye lens 62 and the light-emitting lamp panel are respectively located at opposite ends of the light source support 61, and the fly-eye lens 62 is formed by combining a plurality of lenslet arrays, and may be used to improve uniformity of illumination light emitted by the light-emitting lamp panel. The light-emitting mode of the light-emitting lamp panel can be, for example, laser illumination, and has higher brightness and good collimation performance; alternatively, the light-emitting lamp panel may include a plurality of arrays of LED beads, and a light-adjusting plate 63, for example, a spherical convex lens plate, may be disposed between the fly-eye lens 62 and the light-emitting lamp panel, and divergent light emitted by the light-emitting lamp panel is converged and collimated by the light-adjusting plate 63 and then enters the fly-eye lens 62. The light modulation plate 63 may be disposed at one end of the light source support 61 on the same side as the light emitting lamp panel, that is, the light modulation plate 63 and the fly eye lens 62 are disposed at opposite ends of the light source support 61, respectively, and the light emitting lamp panel may be disposed at one side of the light modulation plate 63 away from the light source support 61. Fig. 13 shows a schematic structure of a light source holder 61, fig. 14 and 15 show schematic structures of upper and lower sides of a light adjusting plate 63, respectively, and fig. 16 shows a schematic structure of a fly-eye lens 62.
The heat dissipating module 64 may include a heat conductive pad 641 and a heat dissipating block 642. Specifically, the heat-conducting pad 641 may be made of a heat-resistant material such as silica gel, the heat-conducting pad 641 may be adhered to the upper surface of the heat-dissipating block 642, the heat-dissipating block 642 may be disposed at the lower end of the light source bracket 61 through a connecting member such as a bolt, and the heat-conducting pad 641 is clamped between the light-emitting lamp panel and the heat-dissipating block 642, the heat-conducting pad 641 may conduct heat generated in the light-emitting process of the light-emitting lamp panel to the heat-dissipating block 642, and the heat-dissipating block 642 is used for accelerating heat dissipation.
Referring to fig. 13, which shows a schematic view of the light source holder 61 at an inverted viewing angle, the fly-eye lens 62 may also include a first fly-eye region and a second fly-eye region, and a region between the first fly-eye region and the second fly-eye region, where no microlens structure is provided, which may be opposite to the illumination partition 611 of the light source holder 61 when the fly-eye lens 62 is mounted to the light source holder 61 such that the illumination partition 611 longitudinally supports the fly-eye lens 62. Further, a support column 614 may be further disposed at the junction of the side walls of the first illumination cavity 612 and the second illumination cavity 613, for supporting the edge region of the fly-eye lens 62, enhancing the supporting rigidity of the fly-eye lens 62, and improving the mounting precision of the fly-eye lens 62 and the light source support 61, so as to optimize the light homogenizing effect of the fly-eye lens 62 on the light path.
In particular, the lower end surface of the light source holder 61 may be provided with a clamping portion 615, and the clamping portion 615 has two openings facing the directions of the first illumination cavity 612 and the second illumination cavity 613, respectively, for clamping the first lamp panel 16 and the second lamp panel 17, respectively.
Regarding the matching manner of the light source assembly and the support housing 20, referring to fig. 19, an exemplary embodiment of the support housing 20 from the bottom up view is shown, the bottom of the support housing 20 may be provided with a connection groove 25, the outer wall of the light source bracket 61 may be provided with a connection block 616 matching with the connection groove 25, so that the light source bracket 61 may be slidably mounted on the bottom of the support housing 20 and may be locked and fixed by a bolt connection, and after being mounted in place, the illumination partition 611 of the light source bracket 61 may be connected with the light blocking plate 21 in the support housing 20. In an exemplary embodiment, the support housing 20 is provided with a harness via such that the control harness of the light emitting lamp panel, the harness of the first lighting circuit 13 and the second lighting circuit 14 may be introduced into the head-up display from outside to inside through the harness via.
In an exemplary embodiment of the present disclosure, referring to fig. 18, the upper surface of the heat dissipating block 642 may be provided with a limit rib 643, referring to fig. 15, the lower surface of the light modulating plate 63 is also provided with a reinforcing rib 631, and the limit rib 643 cooperates with the reinforcing rib 631 to limit, so that the support of the light modulating plate 63 may be enhanced, and the support rigidity of the light modulating plate 63 may be enhanced.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any adaptations, uses, or adaptations of the disclosure following the general principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (13)
1. A head-up display, comprising:
the display chip comprises a first display area and a second display area;
the light guide device comprises a support shell, wherein a light guide cavity penetrating through the support shell is arranged in the support shell, a light isolation plate is arranged in the light guide cavity, the light isolation plate divides the light guide cavity into a first light guide cavity and a second light guide cavity, and the first light guide cavity and the second light guide cavity penetrate through the support shell;
The display chip is arranged at one end of the light guide cavity, the first display area is opposite to the first light guide cavity, and the second display area is opposite to the second light guide cavity.
2. The head-up display of claim 1, wherein the display is configured to display the plurality of images,
the display chip is used for emitting image light, and the thickness of one end of the light isolation plate, which is close to the display chip, is smaller than the thickness of one end of the light isolation plate, which is far away from the display chip.
3. The head-up display of claim 1, wherein the display chip is a light-emitting lamp panel, the head-up display further comprises a transmissive display screen, the transmissive display screen comprises a first image area and a second image area, and the transmissive display screen is disposed at the other end of the light guiding cavity, so that the first image area and the first display area are respectively disposed at two opposite ends of the first light guiding cavity, and the second image area and the second display area are respectively disposed at two opposite ends of the second light guiding cavity.
4. The head-up display of claim 3, wherein the light emitting light panel comprises a first light panel, a second light panel, a first lighting circuit, a second lighting circuit, and a control motherboard, the first display area is disposed on the first light panel, the second display area is disposed on the second light panel, the first light panel and the second light panel are separately disposed, the first light panel is connected to the control motherboard through the first lighting circuit, and the second light panel is connected to the control motherboard through the second lighting circuit.
5. The head-up display of claim 3, further comprising a light shield, wherein a light blocking cavity is provided in the light shield and penetrates the light shield, an extension plate is provided in the light blocking cavity, the extension plate divides the light blocking cavity into a first light blocking cavity and a second light blocking cavity, and the first light blocking cavity and the second light blocking cavity penetrate the light shield;
the light-isolating cavity is arranged on one side, far away from the light-guiding cavity, of the transmission type display screen, the first light-isolating cavity is opposite to the first image area, and the second light-isolating cavity is opposite to the second image area.
6. The head-up display of claim 5, wherein the display comprises,
the thickness of the extension plate increases from one end close to the transmission type display screen to one end far away from the transmission type display screen.
7. The head-up display of claim 5, further comprising a light homogenizing sheet, wherein a connecting portion is provided at one end of the light shield adjacent to the support housing, and the connecting portion comprises connecting plates extending in a direction from the first light blocking cavity to the second light blocking cavity, and the connecting plates are arranged in pairs in a direction from opposite ends of the extending plates;
The connecting plate is provided with a sliding groove, the sliding groove is used for being matched with the transmission type display screen, the connecting plate is also provided with a plug hole for installing the light homogenizing sheet and a buckle for being matched with the supporting shell, and the sliding groove, the plug hole and the buckle are sequentially arranged along the direction facing the supporting shell.
8. The head-up display of claim 7, wherein the display is configured to display the plurality of images,
the connecting plate is provided with a locating pin, one end of the light shield, which is close to the supporting shell, is also provided with a locating piece, and the locating piece is perpendicular to the connecting plate;
the outer wall of the support shell is provided with a first positioning groove and a second positioning groove, the first positioning groove is used for being matched with the positioning pin, and the second positioning groove is used for being matched with the positioning piece.
9. The head-up display of claim 3, wherein the display comprises,
the head-up display comprises a light source assembly, wherein the light source assembly comprises a light source support, a fly eye lens, a light modulation plate and a heat radiation module, the fly eye lens, the light modulation plate, the light-emitting lamp plate and the heat radiation module are sequentially installed on the light source support in a stacked mode, and the light source support is installed at one end of the light guide cavity.
10. The heads-up display of claim 1 further comprising:
the first reflecting mirror is positioned opposite to the first light guide cavity along the extending direction of the side wall of the first light guide cavity along the light isolation plate and is used for reflecting light rays emitted from the first display area;
the second reflecting mirror is positioned opposite to the second light guide cavity along the extending direction of the side wall of the second light guide cavity, and the second reflecting mirror is used for reflecting light rays emitted from the second display area.
11. The heads-up display of claim 10 further comprising a third mirror, the first mirror and the second mirror being configured to reflect light to different locations of the third mirror, the third mirror being configured to reflect light to a projection medium external to the heads-up display; wherein,
the light reflected by the first reflecting mirror and the light reflected by the second reflecting mirror do not intersect, and the light does not form a crossed light path in the process of being transmitted to the projection medium by the display chip.
12. The head-up display of claim 11, wherein the first mirror, the second mirror, and the third mirror are convex mirrors for reflecting light rays stepwise out to the projection medium.
13. The head-up display of any one of claims 1 to 12, wherein,
the inner wall of the support shell and the side wall of the light isolation plate, which are used for forming the first light guide cavity and the second light guide cavity, are provided with extinction layers, and the extinction layers are used for absorbing light projected to the extinction layers.
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| CN202311213250.9A CN117192779A (en) | 2023-09-20 | 2023-09-20 | Head-up display |
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| CN202311213250.9A CN117192779A (en) | 2023-09-20 | 2023-09-20 | Head-up display |
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