Vehicle-mounted head-up display device and vehicle

Abstract

The utility model relates to the field of automotive electronics, in particular to vehicle-mounted head-up display equipment and a vehicle. The vehicle-mounted head-up display device comprises a wind shield and an image source assembly, the wind shield comprises a waveguide sheet layer, and the waveguide sheet layer is provided with a first reflection texture; the image source assembly is used for generating a projection light beam of a to-be-displayed picture and projecting the projection light beam to the first reflection texture, so that the projection light beam is incident to the waveguide sheet layer based on the first reflection texture and is subjected to total reflection propagation in the waveguide sheet layer; the waveguide sheet layer is further provided with a second reflection texture which is used for emitting projection light beams which are transmitted in the waveguide sheet layer in a total reflection mode, and the emitting direction is the direction of a driving position. The utility model provides the vehicle-mounted head-up display device which is small in size and high in integration level and does not need to solve the ghosting problem.

Description

Technical Field

[0001] This application relates to the field of automotive electronics, and more particularly, to in-vehicle head-up display devices and vehicles. Background Art

[0002] A head-up display is an imaging technology that projects an image onto the windshield and into the driver's eyes, which can display some important driving information in the air and reduce the frequency of the driver looking down at the instrument panel and the center control screen. Nowadays, more and more cars are equipped with head-up displays to improve driving safety. With the development and maturity of the industry, users' demand for the imaging size of products is increasing, and the requirement for imaging quality is getting higher and higher, resulting in higher design and development and process difficulties for head-up displays and their peripheral components. Among them, the volume and imaging effect of the product are the two biggest challenges.

[0003] In related technologies, the head-up display uses a reflector to reflect the image onto the windshield, or directly reflects the image onto the windshield, which has two problems: 1. The volume of the head-up display is getting larger and larger, and the sizes of the reflector and the imaging area of the windshield will also increase accordingly. At the same time, the process difficulty and cost of the reflector and the windshield will also increase; 2. The traditional head-up display uses the reflection effect of the curved mirror and the windshield to magnify the virtual image, which will produce ghosting. It is necessary to add a PVB wedge film to eliminate the ghosting, so the design difficulty of the optical path of the windshield and the head-up display will increase.

[0004] Therefore, this application provides an in-vehicle head-up display device and a vehicle to solve one of the above technical problems. Utility Model Content

[0005] The purpose of this application is to provide an in-vehicle head-up display device and a vehicle, which can solve at least one of the above-mentioned technical problems. The specific solutions are as follows:

[0006] According to the specific implementation manners of this application, in the first aspect, this application provides an in-vehicle head-up display device, including:

[0007] A windshield and an image source assembly. The windshield includes a waveguide layer, and the waveguide layer is provided with a first reflection texture; the image source assembly is used for generating a projection beam of a to-be-displayed picture and for projecting the projection beam onto the first reflection texture, so that the projection beam is incident on the waveguide layer based on the first reflection texture and undergoes total reflection propagation in the waveguide layer; the waveguide layer is further provided with a second reflection texture for emitting the projection beam that undergoes total reflection propagation in the waveguide layer, and the emitting direction is the driving position direction.

[0008] In one embodiment, the windshield further includes a first protective layer and a second protective layer; the windshield is a laminated design including the first protective layer, the waveguide layer, and the second protective layer; the first protective layer and the second protective layer are light-transmissive layers with a hardness higher than that of the waveguide layer, and are used to protect the waveguide layer against impact.

[0009] In one embodiment, the image source assembly is disposed at the lower part of the windshield.

[0010] In one embodiment, the image source assembly is disposed at the side of the windshield.

[0011] In one embodiment, the image source assembly and the driver's seat are on the same side of the windshield.

[0012] In one embodiment, the image source assembly and the driver's seat are on opposite sides of the windshield.

[0013] According to a specific embodiment of the present application, in a second aspect, the present application provides a vehicle configured with an in-vehicle head-up display device. The in-vehicle head-up display device includes a windshield and an image source assembly. The windshield includes a waveguide layer provided with a first reflection texture and a second reflection texture.

[0014] The above solution of the embodiment of the present application has at least the following beneficial effects compared with the prior art:

[0015] The in-vehicle head-up display device performs optical path propagation based on the image source assembly and the waveguide layer. When the image source assembly generates a projection beam of the to-be-displayed image, the projection beam propagates along the optical path in the order of the image source assembly, the first reflection texture, the inside of the waveguide layer, the second reflection texture, and then to the driver's seat. While realizing head-up display based on the in-vehicle windshield, it has a smaller volume and no ghosting compared with the prior art head-up display device with a mirror structure, reducing the device cost and deployment cost of the in-vehicle head-up display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shows a schematic diagram of an in-vehicle head-up display device of the present application;

[0017] Figure 2 Shows a schematic diagram of an image source assembly disposed at the lower part of the windshield;

[0018] Figure 3 Shows another schematic diagram of an image source assembly disposed at the lower part of the windshield;

[0019] Figure 4 Shows a schematic diagram of an image source assembly disposed at the side of the windshield;

[0020] Figure 5Another schematic diagram shows an image source component placed on the side of the windshield.

[0021] Reference numerals: 001, image source component; 002, waveguide sheet layer; 0021, first reflection texture; 0022, second reflection texture; 003, second protective layer; 004, first protective layer; 005, driver's seat; 006, windshield. Detailed implementation manners

[0022] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0023] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "the" and "said" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. "Plural" generally includes at least two.

[0024] It should be understood that the term "and / or" used herein is only a description of the associated relationship of the associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0025] It should be understood that although terms such as first, second, and third may be used in the embodiments of the present application for description, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, without departing from the scope of the embodiments of the present application, the first may also be referred to as the second, and similarly, the second may also be referred to as the first.

[0026] Depending on the context, the words "if", "when" as used herein may be interpreted as "when" or "while" or "in response to determining" or "in response to detecting". Similarly, depending on the context, the phrase "if determined" or "if detecting (stated condition or event)" may be interpreted as "when determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)".

[0027] It should be particularly noted that the symbols and / or numbers existing in the specification, if not marked in the accompanying drawings, are not reference numerals.

[0028] Some application scenarios of the present application are exemplarily shown below.

[0029] Application scenario 1: Urban driving assistance. On busy city streets, drivers need to frequently pay attention to traffic lights, road signs, and the dynamics of other vehicles. By using this in-vehicle head-up display device, important information such as navigation instructions and speed limits can be directly displayed within the driver's direct line of sight in the front, thereby reducing the time the driver looks down at the dashboard and improving driving safety.

[0030] Application scenario 2: Highway driving. On highways, drivers need to maintain concentrated attention for a long time. At this time, the in-vehicle head-up display device can display information such as vehicle speed, lane departure warning, and forward obstacle warning to help the driver better maintain a safe driving state.

[0031] Application scenario 3: Driving under adverse weather conditions. Under adverse weather conditions such as rain, snow, and fog, visibility is poor. At this time, the in-vehicle head-up display device can display information such as road conditions and visibility tips to help the driver make safer driving decisions.

[0032] The optional embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0033] Figure 1 A schematic diagram of an in-vehicle head-up display device of the present application is shown.

[0034] In the present application, as Figure 1 shown, the in-vehicle head-up display device includes a windshield 006 and an image source component 001. The windshield 006 includes a waveguide layer 002, and the waveguide layer 002 is provided with a first reflection texture 0021 and a second reflection texture 0022.

[0035] In the present application, the image source component 001 is used to generate a projection beam of the to-be-displayed image, and to project the projection beam onto the first reflection texture 0021, so that the projection beam is incident on the waveguide layer 002 based on the first reflection texture 0021 and undergoes total internal reflection propagation within the waveguide layer 002.

[0036] On this basis, the second reflection texture 0022 is used to emit the projection beam that undergoes total internal reflection propagation within the waveguide layer 002, and the emission direction is the direction of the driver's seat 005.

[0037] In the present application, the windshield 006 is one of the core components of the in-vehicle head-up display device, responsible for guiding the light from the image source component 001 into the driver's line of sight so that vehicle information can be viewed without diverting the line of sight. Among them, the waveguide layer 002 is the core part of the windshield 006, which allows light to undergo total internal reflection propagation inside through a specific design and finally emits from a preset position.

[0038] In this application, the first reflection texture 0021 is a microstructure provided on the waveguide layer 002, and is used to reflect and direct the light beam emitted by the image source component 001 into the interior of the waveguide layer 002. The second reflection texture 0022 is another set of microstructures also provided on the waveguide layer 002, and is used to reflect the light beam that has propagated through total internal reflection out of the waveguide layer 002, so that it is emitted in the direction of the driver.

[0039] In this application, the windshield 006 further includes a first protective layer 004 and a second protective layer 003.

[0040] Exemplarily, the windshield is a laminated design composed of the first protective layer 004, the waveguide layer 002, and the second protective layer 003.

[0041] The first protective layer 004 and the second protective layer 003 are respectively light-transmissive layers with a hardness higher than that of the waveguide layer 002, and are used to provide anti-collision protection for the waveguide layer 002.

[0042] In this application, the first protective layer 004 and the second protective layer 003 are provided to protect the waveguide layer 002 from external impacts and abrasions, and at the same time ensure the transparency and durability of the overall structure.

[0043] As a feasible embodiment, the first protective layer 004 is located above the waveguide layer 002 and plays a direct protective role, and the second protective layer 003 is located below the waveguide layer 002 and also plays a protective role, and at the same time helps to fix the position of the waveguide layer 002. Exemplarily, the first protective layer 004 and the second protective layer 003 should be selected to have sufficient hardness to prevent scratches and damages during daily use, while maintaining good light-transmitting performance.

[0044] Exemplarily, the image source component 001 can be provided at the lower part of the windshield 006.

[0045] For example, as Figure 2 shown, the image source component 001 and the driver's seat 005 are on the same side of the windshield 006. When the image source component 001 generates a projection light beam for the to-be-displayed image, the projection light beam propagates along the optical path in the order of the image source component 001, the first reflection texture 0021, the interior of the waveguide layer 002, the second reflection texture 0022, and the driver's seat 005.

[0046] Again, for example, as Figure 3 shown, the image source component 001 and the driver's seat 005 are on different sides of the windshield 006. When the image source component 001 generates a projection light beam for the to-be-displayed image, the projection light beam propagates along the optical path in the order of the image source component 001, the first reflection texture 0021, the interior of the waveguide layer 002, the second reflection texture 0022, and the driver's seat 005.

[0047] In this application, the image source component 001 can be installed at the lower part of the windshield 006. This layout is beneficial for making use of the interior space of the vehicle and at the same time reducing the obstruction of the driver's vision.

[0048] Exemplarily, the image source component 001 can be arranged at the side of the windshield 006. Taking the arrangement of the image source component 001 at the right side of the windshield 006 as an example, it will be described in conjunction with the drawings.

[0049] For example, as Figure 4 shown, the image source component 001 and the driver's seat 005 are on the same side of the windshield 006. When the image source component 001 generates the projection beam of the to-be-displayed image, the projection beam propagates along the optical path in the order of the image source component 001, the first reflection texture 0021, inside the waveguide layer 002, the second reflection texture 0022, to the driver's seat 005.

[0050] Another example, as Figure 5 shown, the image source component 001 and the driver's seat 005 are on different sides of the windshield 006. When the image source component 001 generates the projection beam of the to-be-displayed image, the projection beam propagates along the optical path in the order of the image source component 001, the first reflection texture 0021, inside the waveguide layer 002, the second reflection texture 0022, to the driver's seat 005.

[0051] In this application, in addition to installing the image source component 001 at the lower part of the windshield 006, another option is to install the image source component 001 on one side of the windshield 006. This can further optimize the use of the interior space of the vehicle and may simplify the mechanical design of the device.

[0052] In this application, if the image source component 001 and the driver's seat 005 are on the same side of the windshield 006, specific angles and reflection mechanisms are required to ensure that the light propagates correctly to the line of sight in front of the driver. If the image source component 001 and the driver are on different sides of the windshield 006, the light needs to undergo more reflections to reach the driver's line of sight, which may require a more complex optical design to achieve. Therefore, the arrangement where the image source component 001 and the driver's seat 005 are on the same side of the windshield 006 is taken as a preferred arrangement in this application.

[0053] In this application, the following requirements are imposed on the various components of the vehicle-mounted head-up display device. The waveguide layer 002 can be made of high-quality transparent materials to ensure good optical performance. The first reflection texture 0021 adopts a precise microstructure design to ensure that the light beam accurately enters the waveguide layer 002 for full reflection propagation. The second reflection texture 0022 also adopts a precise microstructure to ensure that the light beam is emitted at a suitable angle to the driver's line of sight. The protective layer needs to have a material with sufficient hardness and light transmittance to protect the waveguide layer 002 from damage and ensure that the display effect is not affected. The image source component 001 needs to have high resolution, fast response capability, and the ability to adapt to different lighting conditions.

[0054] The vehicle-mounted head-up display device of the present application realizes clear and stable image display through the unique waveguide layer 002 design and reflective texture. At the same time, by setting the image source component 001 at different positions of the windshield 006, it can be flexibly adjusted according to the specific needs and internal layout of the vehicle. In addition, the addition of the first protective layer 004 and the second protective layer 003 improves the overall durability and safety of the equipment, making the vehicle-mounted head-up display device more suitable for use in complex and changeable vehicle environments. While realizing the head-up display based on the vehicle-mounted windshield 006, the head-up display device has a smaller size and no ghosting compared to the existing reflector structure, which reduces the equipment cost and deployment cost of the vehicle-mounted head-up display device.

[0055] The present application also provides a vehicle based on the above-mentioned embodiments, which is used to load the vehicle-mounted head-up display device of any of the above-mentioned embodiments, including a windshield and an image source assembly, the windshield including a waveguide layer, and the waveguide layer is provided with a first reflective texture and a second reflective texture.

[0056] In addition, the present application can perform stable display. Even if the vehicle is traveling on a bumpy road, the displayed image will not be greatly affected because the propagation path of the light beam in the waveguide layer is fixed, thus ensuring the continuity of the information.

[0057] The present application adopts efficient optical transmission and utilizes the principle of total reflection to reduce the loss of light beams during transmission, thereby ensuring the brightness and clarity of the display. Through the internal reflection of the waveguide layer, the entire system can be made very compact, saving space inside the vehicle. Compared with the traditional vehicle-mounted head-up display device that uses a reflector for head-up display, the vehicle-mounted head-up display device of the present application can have a smaller size and does not have the problem of ghosting, and the hardware requirements and the cost of eliminating ghosting can be reduced.

[0058] This application allows the driver to adjust the display orientation according to their line of sight height and position preference, which can accommodate drivers of different heights and sitting postures, ensure that all users can clearly see the display information, and at the same time ensure that the display information is always in the best viewing position to avoid potential safety hazards caused by line of sight deviation.

[0059] In practical applications, this application can be widely used in various types of vehicles, from passenger cars to commercial vehicles, and even special vehicles, all of which can benefit from it. In addition, with the development of autonomous driving technology, such a head-up display system can further integrate the functions of advanced driver assistance systems (ADAS), providing strong support for future intelligent transportation systems.

[0060] Although the operations are described in a specific order in the figures, it should not be construed as requiring the operations to be performed in the specific order shown or in a serial order, or requiring all of the operations shown to obtain the desired result. In certain environments, multitasking and parallel processing may be advantageous.

[0061] Any of the steps, operations, or procedures described herein can be performed or implemented using one or more hardware or software modules alone or in combination with other devices. In one embodiment, the software module is implemented using a computer program product that includes a computer-readable medium containing computer program code that can be executed by a computer processor to perform any or all of the described steps, operations, or procedures.

[0062] For purposes of illustration and description, the foregoing description of the implementation of this application has been given. The foregoing description is not exhaustive nor is it intended to limit this application to the exact form disclosed, and various variations and modifications are possible in light of the above teachings, or various variations and modifications may be obtained from the practice of this application. These embodiments are chosen and described in order to illustrate the principles of this application and its practical application so that those skilled in the art can utilize this application in various embodiments and various modifications suitable for the particular purposes contemplated.

[0063] It can be further understood that unless otherwise specified, "connection" includes direct connection between two parties without other components therebetween, and also includes indirect connection between two parties with other elements therebetween.

[0064] It can be further understood that although the operations are described in a specific order in the figures in the embodiments of this application, it should not be construed as requiring the operations to be performed in the specific order shown or in a serial order, or requiring all of the operations shown to obtain the desired result. In certain environments, multitasking and parallel processing may be advantageous.

[0065] Those skilled in the art will readily conceive of other embodiments of the present application after considering the specification and practicing the utility model disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include well-known knowledge or conventional technical means in the field of the present application that are not disclosed in the present application. The specification and examples are only regarded as exemplary, and the true scope and spirit of the present application are pointed out by the following claims.

[0066] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

[0067] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

1. A vehicle head-up display device, comprising a windshield and an image source assembly, characterized in that, the windshield includes a waveguide layer, and the waveguide layer is provided with a first reflection texture; the image source assembly is configured to generate a projection beam of a to-be-displayed image, and to project the projection beam onto the first reflection texture, so that the projection beam enters the waveguide layer based on the first reflection texture and undergoes total internal reflection propagation within the waveguide layer; the waveguide layer is further provided with a second reflection texture for emitting the projection beam that undergoes total internal reflection propagation within the waveguide layer, and the emitting direction is towards the driver's seat direction.

2. The in-vehicle head-up display device according to claim 1, wherein, the windshield further includes a first protective layer and a second protective layer; the windshield has a laminated design of the first protective layer, the waveguide layer, and the second protective layer; the first protective layer and the second protective layer are respectively light-transmissive layers with a hardness higher than that of the waveguide layer, and are used to protect the waveguide layer against impact.

3. The in-vehicle head-up display device according to claim 2, wherein the image source assembly is disposed at the lower part of the windshield.

4. The vehicle head-up display device according to claim 2, wherein the image source assembly is disposed at the side part of the windshield.

5. The vehicle head-up display device according to claim 3 or 4, characterized in that the image source assembly and the driver's seat are on the same side of the windshield.

6. The vehicle head-up display device according to claim 3 or 4, characterized in that, the image source assembly and the driver's seat are on different sides of the windshield.

7. A vehicle, characterized in that, The vehicle is equipped with a vehicle head-up display device, the vehicle head-up display device includes a windshield and an image source assembly, the windshield includes a waveguide layer, and the waveguide layer is provided with a first reflection texture and a second reflection texture.

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