Head-up display and vehicle
By using polarizing film and composite filters to absorb polarized light in the head-up display, the problem of light pollution caused by reflection from the head-up display in high-brightness environments is solved, improving driving safety and experience.
Patent Information
- Application Number
- CN202520009935.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-02
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-01-02
AI Technical Summary
Existing head-up displays reflect sunlight in bright environments, causing light pollution and affecting driver safety and experience.
By employing polarizing films and composite filters, the first and second polarized rays are absorbed respectively, reducing the energy input of the projection module and thus minimizing reflected light pollution.
It effectively reduces harmful light reflected from the projection module, improving the driver's safety and experience.
Smart Images
Figure CN223679441U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to display technical field especially is involved in a kind of head-up display and vehicle. BACKGROUND
[0002] In the related art, as a new electronic product of automobile, the head-up display can display necessary driving information in the actual traffic conditions within the driver's line of sight, so as to expand and enhance the driver's perception of the driving environment, improve the safety of driving. While the head-up display brings us convenience, it also has some defects. In some scenarios, the head-up display display interface will reflect sunlight and cause light damage, especially for the light damage of high-brightness white screen. The light damage and the normal screen of the head-up display are superimposed together, so that the human eye may not be able to see the screen clearly, which brings trouble to the driver driving, and also makes the head-up display defective, which seriously affects the driving safety and driving experience. SUMMARY
[0003] The utility model aims at at least one of the technical problems existing in the prior art. Therefore, one purpose of the utility model is to provide a head-up display, which reduces the energy entering the projection module to reduce the harmful light reflected by the projection module, thereby reducing the light damage of the head-up display and improving the driving safety and driving experience of the driver.
[0004] The utility model further provides a vehicle with the above head-up display.
[0005] According to the head-up display of the first aspect of the utility model, the vehicle includes a front windshield, and the head-up display includes a projection module, a light emitting element, and a polarizing film. The front windshield is located on the light emitting side of the light emitting element. The polarizing film is located between the light emitting element and the front windshield in the light emitting direction of the light emitting element. The polarizing film is used to absorb first polarized light. A composite filter is located on the light path from the front windshield to the projection module and is fixedly connected to the front windshield. The composite filter is used to absorb second polarized light.
[0006] According to the head-up display of the utility model, the projection module includes a polarizing film, the composite filter is located on the front windshield, the polarizing film is used to absorb first polarized light, and the composite filter is used to absorb second polarized light. The energy entering the projection module is reduced to reduce the harmful light reflected by the projection module, thereby reducing the light damage of the head-up display and improving the driving safety and driving experience of the driver.
[0007] According to some embodiments of the present application, the composite filter includes an absorbing polarizing layer and a reflecting polarizing layer stacked with each other, the absorbing polarizing layer is located on the side of the reflecting polarizing layer close to the front windshield, and the absorbing polarizing layer is used for absorbing the second polarized light, and the reflecting polarizing layer is used for reflecting the second polarized light emitted by the light emitting component on the light emitting side of the projection module.
[0008] According to some embodiments of the present application, the absorbing polarizing layer is an absorbing polarizing plate.
[0009] According to some embodiments of the present application, the absorbing polarizing plate is used for absorbing 50%-100% of the second polarized light.
[0010] According to some embodiments of the present application, the reflecting polarizing layer includes a plurality of reflecting polarizing plates stacked with each other.
[0011] According to some embodiments of the present application, the composite filter is located on the inner side of the front windshield.
[0012] According to some embodiments of the present application, the projection module includes a housing, the light emitting component is located in the housing, the housing has an opening arranged towards the composite filter, and the polarizing film is arranged at the opening.
[0013] According to some embodiments of the present application, the projection module further includes a diffusion plate and a mirror located in the housing, the diffusion plate is located on the light emitting side of the light emitting component, and the mirror is located on the light emitting side of the diffusion plate.
[0014] According to some embodiments of the present application, the mirror includes a primary mirror and a secondary mirror, the primary mirror is located on the light emitting side of the light emitting component, and the secondary mirror is located on the light emitting side of the primary mirror.
[0015] The vehicle according to the second aspect of the present application comprises the head-up display according to the first aspect of the present application.
[0016] The vehicle according to the present application reduces the energy entering the projection module by arranging the head-up display, the polarizing film for absorbing the first polarized light, and the composite filter for absorbing the second polarized light, thereby reducing the harmful light reflected by the projection module, further reducing the light hazard of the head-up display, and improving the driving safety and experience of the driver.
[0017] Additional aspects and advantages of the present application will be given in part in the following description, become apparent from the following description, or be understood through practice of the present application. BRIEF DESCRIPTION OF DRAWINGS
[0018] The above and / or additional aspects and advantages of the present utility model will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the references to the following drawings of which:
[0019] Figure 1 is a schematic view of the cooperation of the head-up display and the front windshield according to some embodiments of the present utility model;
[0020] Figure 2 is Figure 1 a schematic view of the cooperation of the head-up display and the front windshield;
[0021] Figure 3 is Figure 1 a schematic view of the cooperation of the head-up display and the front windshield, wherein the specific structure of the composite filter is shown.
[0022] Reference signs:
[0023] 100, head-up display;
[0024] 10, projection module; 11, light emitting element; 12, polarized film; 13, diffusion plate; 14, reflector; 141, first-level reflector; 142, second-level reflector;
[0025] 20, composite filter; 21, absorbing polarized layer; 22, reflecting polarized layer;
[0026] 3, front windshield; 4, driver. DETAILED DESCRIPTION
[0027] Embodiments of the present utility model are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model, and cannot be understood as a limitation of the present utility model.
[0028] In the description of the utility model, it is necessary to understand that the orientation or positional relation indicated by the terms "upper", "lower", "front", "rear", "left", "right" and the like is based on the orientation or positional relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "a plurality of" is two or more than two, unless otherwise specifically limited.
[0029] In the description of the utility model, it should be noted that, unless otherwise specifically specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication between two elements or the interaction between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.
[0030] Reference will be made below Figures 1-3 The head-up display 100 according to the embodiments of the utility model is described.
[0031] According to the head-up display 100 of the first aspect of the utility model, the head-up display 100 is used for a vehicle, the vehicle includes a front windshield glass 3, and the head-up display 100 is used for projecting information onto the front windshield glass 3 within the driver's 4 front line of sight, so that the driver 4 expands and enhances his own perception of the driving environment, improves the safety and technology of driving, and at the same time, the driver 4 does not have to adjust the eyes between observing the road in the distance and the instrument in the near place, which can avoid eye fatigue and reduce the safety risk of long-time driving.
[0032] The head-up display 100 includes a projection module 10 and a composite filter piece 20, the projection module 10 includes a light emitting piece 11 and a polarized film 12, the front windshield glass 3 is located on the light emitting side of the light emitting piece 11, and in the light emitting direction of the light emitting piece 11, the polarized film 12 is located between the light emitting piece 11 and the front windshield glass 3, and the polarized film 12 is used for absorbing first polarized light. The composite filter piece 20 is located on the light path from the front windshield glass 3 to the projection module 10, and the composite filter piece 20 is fixedly connected to the front windshield glass 3, and the composite filter piece 20 is used for absorbing second polarized light. For example, the first polarized light can be P light, and the second polarized light can be S light.
[0033] When the sunlight propagates to the direction of the head-up display 100 through the front windshield glass 3, the sunlight passes through the composite filter 20, the composite filter 20 absorbs the second polarized light, and then the sunlight passes through the polarizing film 12, the polarizing film 12 absorbs the first polarized light, so as to reduce the energy of the sunlight entering the projection module 10, reduce the light reflected to the front windshield glass 3 through the projection module 10, and further reduce the glare of the head-up display 100.
[0034] According to the head-up display 100 provided by the embodiment of the present application, the projection module 10 comprises the polarizing film 12, the composite filter 20 is located on the front windshield glass 3, the polarizing film 12 is used for absorbing the first polarized light, and the composite filter 20 is used for absorbing the second polarized light, so as to reduce the energy entering the projection module 10, reduce the light reflected by the projection module 10, further reduce the glare of the head-up display 100, and improve the driving safety and driving experience of the driver 4.
[0035] According to some embodiments of the present application, referring to Figures 1-3 The composite filter 20 comprises the absorbing polarizing layer 21 and the reflecting polarizing layer 22 which are stacked with each other, the absorbing polarizing layer 21 is located on the side of the reflecting polarizing layer 22 close to the front windshield glass 3, the absorbing polarizing layer 21 is used for absorbing the second polarized light, and on the light-out side of the projection module 10, the reflecting polarizing layer 22 is used for reflecting the second polarized light emitted by the light emitting element 11.
[0036] When the sunlight passes through the composite filter 20, the absorbing polarizing layer 21 absorbs the second polarized light, and then the sunlight passes through the polarizing film 12, the polarizing film 12 absorbs the first polarized light, so as to reduce the energy of the sunlight entering the projection module 10, reduce the light reflected to the front windshield glass 3 through the projection module 10, and further reduce the glare of the head-up display 100; and the second polarized light emitted by the light emitting element 11 is projected on the reflecting polarizing layer 22, the reflecting polarizing layer 22 reflects the second polarized light emitted by the light emitting element 11 to the eyes of the driver 4, so that the driver 4 can see the picture emitted by the projection module 10. The reflecting polarizing layer 22 is arranged on the inner side of the absorbing polarizing layer 21, which ensures that the second polarized light emitted by the light emitting element 11 maintains the original power, and the energy entering the eyes of the driver 4 is not lost.
[0037] According to some embodiments of the present application, referring to Figures 1-3The absorbing type polarizing layer 21 is an absorbing type polarizer. The absorbing type polarizer can allow light in a specific direction to pass through and absorb the second polarized light. The absorbing type polarizer is usually made of a material with a long-chain molecular structure, and the molecules are stretched to form an anisotropic environment, so that the light wave can only vibrate in a specific direction when passing through. When natural light passes through the absorbing type polarizer, only the light wave parallel to the internal structure of the absorbing type polarizer can pass through smoothly.
[0038] According to some embodiments of the present application, referring to Figures 1-3 The absorbing type polarizer is used to absorb 50%-100% of the second polarized light, and the polarizing film 12 is used to absorb 100% of the first polarized light. Under the joint action of the composite light filter 20 and the polarizing film 12, 75%-100% of the total energy of the sunlight can be blocked from entering the projection module 10.
[0039] According to some embodiments of the present application, referring to Figures 1-3 The reflective type polarizing layer 22 includes a plurality of reflective type polarizers stacked on each other. The reflective effect of the reflective type polarizing layer 22 can be achieved by controlling the number of layers of the reflective type polarizer.
[0040] According to some embodiments of the present application, referring to Figures 1-3 The composite light filter 20 is located on the inner side of the front windshield glass 3, so as to avoid dust in the external environment from adhering to the composite light filter 20, and to ensure the function of the composite light filter 20.
[0041] According to some embodiments of the present application, referring to Figures 1-3 The projection module 10 includes a housing, and the light emitting element 11 is located in the housing. The housing can protect the light emitting element 11 and facilitate the installation of the projection module 10. The housing has an opening facing the composite light filter 20, and the polarizing film 12 is arranged at the opening. The polarizing film 12 can not only be used to absorb the first polarized light, but also can play a dustproof role.
[0042] According to some embodiments of the present application, referring to Figures 1-3 The projection module 10 further includes a diffusion plate 13 and a reflector 14 located in the housing. The diffusion plate 13 is located on the light emitting side of the light emitting element 11, and the reflector 14 is located on the light emitting side of the diffusion plate 13. The light emitting element 11 projects light on the diffusion plate 13 to form a display picture, the display picture is reflected to the reflector 14, and then reflected into the driver 4's eyes through the composite light filter 20 of the front windshield glass.
[0043] 9. According to some embodiments of the present application, referring to Figures 1-3The mirror 14 comprises a first mirror 141 and a second mirror 142, the first mirror 141 is located at the light emitting side of the light emitting element 11, and the second mirror 142 is located at the light emitting side of the first mirror 141. The light emitting element 11 projects light on the diffusion plate 13 to form a display picture, the display picture is reflected to the first mirror 141 and the second mirror 142 in turn, and then is reflected into the eyes of the driver 4 through the composite filter 20 of the front windshield. The cooperation of the first mirror 141 and the second mirror 142 can accurately control the direction of the second polarized light emitted by the light emitting element 11, so that the second polarized light propagates according to the specified direction.
[0044] The vehicle according to the second aspect of the present application comprises the head-up display 100 according to the first aspect of the present application.
[0045] The vehicle according to the present application reduces the energy entering the projection module 10 by setting the head-up display 100, the polarizing film 12 is used for absorbing the first polarized light, and the composite filter 20 is used for absorbing the second polarized light, thereby reducing the harmful light reflected by the projection module 10, further reducing the light hazard of the head-up display 100, and improving the driving safety and driving experience of the driver 4.
[0046] In the description of the present application, the description of the terms "some embodiments", "optionally", "further", "some examples" and the like means that the specific features, structures, materials or characteristics described in combination with the embodiments or examples are contained in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0047] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.
Claims
1. A head-up display for a vehicle, characterized by The vehicle comprises a front windshield, and the head-up display comprises: a projection module comprising a light emitting element and a polarized film, the front windshield is located on the light emitting side of the light emitting element, and the polarized film is located between the light emitting element and the front windshield in the light emitting direction of the light emitting element, and the polarized film is used for absorbing first polarized light; a composite filter located on the light path from the front windshield to the projection module and fixedly connected to the front windshield, and the composite filter is used for absorbing second polarized light.
2. The head-up display of claim 1, wherein, The composite filter comprises an absorbing polarizing layer and a reflective polarizing layer stacked with each other, the absorbing polarizing layer is located on the side of the reflective polarizing layer close to the front windshield, the absorbing polarizing layer is used for absorbing the second polarized light, and the reflective polarizing layer is used for reflecting the second polarized light emitted by the light emitting element on the light emitting side of the projection module.
3. The head-up display of claim 2, wherein, The absorbing polarizing layer is an absorbing polarizing plate.
4. The head-up display of claim 3, wherein, The absorbing polarizing plate is used for absorbing 50%-100% of the second polarized light.
5. The head-up display of claim 2, wherein, The reflective polarizing layer comprises a plurality of reflective polarizing plates stacked with each other.
6. The head-up display of claim 1, wherein, The composite filter is located on the inner side of the front windshield.
7. The head-up display of claim 1, wherein, The projection module comprises a shell, the light emitting element is located in the shell, the shell has an opening arranged towards the composite filter, and the polarized film is arranged at the opening.
8. The head-up display of claim 7, wherein, The projection module further comprises a diffusion plate and a mirror located in the shell, the diffusion plate is located on the light emitting side of the light emitting element, and the mirror is located on the light emitting side of the diffusion plate.
9. The head-up display of claim 8, wherein, The mirror comprises a primary mirror and a secondary mirror, the primary mirror is located on the light emitting side of the light emitting element, and the secondary mirror is located on the light emitting side of the primary mirror.
10. A vehicle characterized by comprising: comprise: The head-up display according to any one of claims 1-9.