Image display system, vehicle-mounted HUD system and vehicle

Abstract

The embodiment of the invention provides an image display system, a vehicle-mounted HUD system and a vehicle. The image display system comprises an image display unit, and the image display unit comprises an image source, an adjusting assembly and a projection lens. The image source is used for generating projection light; the adjusting assembly is used for dividing the projection light into at least two beams of light which are not overlapped on a light propagation path; the projection lens comprises a first lens and a second lens, the first lens and the second lens are respectively used for receiving different beams of projection light rays emitted by the adjusting assembly, and the first lens and the second lens have different exit pupil positions; light projected from the image source passes through the adjusting assembly and the projection lens so as to realize different depth-of-field imaging.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of vehicle-mounted display technology. More specifically, the embodiments of the present application relate to an image display system, a vehicle-mounted HUD system and a vehicle. Background Art

[0002] With the continuous development of automobile technology, the vehicle-mounted HUD system, as an important device to improve driving safety and convenience, is increasingly widely used in vehicles. Traditional vehicle-mounted HUD systems usually use single-focal-plane imaging, that is, they can only form a virtual image at a fixed depth of field position, which limits the performance of the vehicle-mounted HUD system in terms of the richness and layering of displayed information. In recent years, consumers have put forward higher requirements for vehicle-mounted HUD systems, hoping to achieve multi-focal-plane imaging to meet more diverse driving information display needs. In order to achieve multi-focal-plane imaging, the existing technology usually uses complex optical structures and multiple image sources, which not only increases the complexity and cost of the vehicle-mounted HUD system, but may also affect the imaging quality and the stability of the entire system.

[0003] Therefore, it is of great significance to develop an image display system and a vehicle-mounted HUD system that are simple in structure, low in cost and capable of multi-focal plane imaging. Summary of the invention

[0004] The purpose of this application is to provide a new technical solution for an image display system, an on-board HUD system and a vehicle.

[0005] In a first aspect, the present application provides an image display system. The image display system includes an image display unit;

[0006] The image display unit includes an image source, an adjustment component and a projection lens;

[0007] The image source is used to generate projection light;

[0008] The adjustment component is used to divide the projection light into at least two beams of light that do not overlap each other on the light propagation path;

[0009] The projection lens includes a first lens and a second lens, wherein the first lens and the second lens are respectively used to receive different beams of projection light emitted from the adjustment component, and the first lens and the second lens have different exit pupil positions;

[0010] The light projected from the image source passes through the adjustment component and the projection lens to achieve imaging with different depths of field.

[0011] Optionally, the image display system further comprises an optical waveguide component;

[0012] The optical waveguide assembly at least comprises a first optical waveguide sheet and a second optical waveguide sheet;

[0013] The first optical waveguide plate has a first coupling-in area, and the first coupling-in area is arranged corresponding to the exit pupil position of the first lens;

[0014] The second optical waveguide plate has a second coupling-in area, and the second coupling-in area is arranged corresponding to the exit pupil position of the second lens.

[0015] Optionally, the first optical waveguide sheet and the second optical waveguide sheet are arranged at intervals along the light propagation direction, and are arranged in a staggered manner perpendicular to the light propagation direction.

[0016] Optionally, the adjustment component includes a controllable reflection and transmission device and a reflection element;

[0017] The controllable reflection and transmission device is located between the image source and the first lens, and can be switched between a transmission state and a reflection state;

[0018] The reflective element is arranged on the reflective path of the controllable reflective-transmissive device and is located on the light incident path of the second lens.

[0019] Optionally, when the controllable reflective-transmissive device is in a transmissive state, the projection light generated by the image source is transmitted through the controllable reflective-transmissive device to the first lens;

[0020] When the controllable reflective-transmissive device is in a reflective state, the projection light generated by the image source is reflected by the controllable reflective-transmissive device and is reflected by the reflective element to the second lens.

[0021] Optionally, when the controllable reflection-transmission device switches between the transmission state and the reflection state, and the switching speed is greater than the reaction speed of human eyes, the human eyes can simultaneously see two virtual images located at different depths of field.

[0022] Optionally, the first coupling region coincides with an exit pupil position of the first lens, and the first light emitted by the first lens is coupled into the first optical waveguide sheet through the first coupling region;

[0023] The second coupling-in region and the second lens have an exit pupil position that coincides with each other, and the second light emitted through the second lens is coupled into the second optical waveguide plate through the second coupling-in region.

[0024] Optionally, the first optical waveguide sheet includes a first outcoupling region, and the second optical waveguide sheet includes a second outcoupling region;

[0025] The first optical waveguide is used to transmit the first light and couple out the light in the first outcoupling area with pupil expansion;

[0026] The second optical waveguide is used for transmitting the second light and outcoupling it in the second outcoupling area with pupil expansion.

[0027] Optionally, the controllable reflection and transmission device is arranged to be inclined relative to the optical axis of the first lens;

[0028] The reflective element is arranged to be inclined relative to the optical axis of the second lens;

[0029] The controllable reflection and transmission device and the reflection element are arranged up and down.

[0030] In a second aspect, the present application provides a vehicle-mounted HUD system, the vehicle-mounted HUD system comprising the image display system, the reflection system and the windshield of the vehicle as described in the first aspect;

[0031] The reflection system is used to receive the projection light projected from the image display system and reflect the light to the windshield;

[0032] The windshield reflects the light beam from the reflection system to the human eye, and at the same time, the reverse extension line of the light beam forms a virtual image at different depths of field in front of the windshield.

[0033] In a third aspect, the present application provides a vehicle, the vehicle comprising:

[0034] the body of the vehicle, including the windscreen; and

[0035] As described in the second aspect, the vehicle-mounted HUD system is arranged on the vehicle body.

[0036] The beneficial effects of this application are:

[0037] The embodiment of the present application provides an image display system with a simple structure and capable of multi-focal plane imaging. The image display system can be applied to a vehicle-mounted HUD system. By adjusting the coordination of components and projection lenses, the image display system can simultaneously generate and project multiple beams of light that do not overlap each other on the light propagation path, thereby forming multiple virtual images with different depths of field within the observation range of the human eye. This function can significantly improve the information presentation capability and user experience of the vehicle-mounted HUD system; the structural design of the entire image display system is compact and highly integrated, which helps to reduce the size and weight of the system and improve its applicability and reliability in a vehicle-mounted environment. The image display system of the embodiment of the present application brings significant performance improvements and optimized user experience to the vehicle-mounted HUD system through new structural design and functional implementation.

[0038] Other features and advantages of the present specification will become apparent from the following detailed description of exemplary embodiments of the present specification with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the specification and, together with the description, serve to explain the principles of the specification.

[0040] Figure 1 A schematic diagram of the structure of the vehicle-mounted HUD system provided in an embodiment of the present application;

[0041] Figure 2 This is one of the structural diagrams of the projection system of the vehicle-mounted HUD system provided in an embodiment of the present application.

[0042] Description of reference numerals:

[0043] 1a, distant virtual image; 1b, near virtual image;

[0044] 2. Windshield;

[0045] 3. Human eyes;

[0046] 4. Reflection system;

[0047] 51, first optical waveguide plate; 52, second optical waveguide plate; 5a, first coupling region; 5b, second coupling region;

[0048] 6. Image display unit; 61. Image source; 62. Controllable reflection and transmission device; 63. Reflection element; 64. First lens; 65. Second lens; 6a. First light; 6b. Second light. DETAILED DESCRIPTION

[0049] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0050] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0051] Techniques and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the techniques and equipment should be considered part of the specification.

[0052] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0053] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0054] The image display system, vehicle-mounted HUD system and vehicle provided in the embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0055] According to an embodiment of the present application, an image display system is provided. Figure 1 and Figure 2 , the image display system includes an image display unit 6; the image display unit 6 includes an image source 61, an adjustment component and a projection lens; the image source 61 is used to generate projection light; the adjustment component is used to divide the projection light into at least two beams of light that do not overlap each other on the light propagation path; the projection lens includes a first lens 64 and a second lens 65, the first lens 64 and the second lens 65 are respectively used to receive different beams of projection light emitted from the adjustment component, and the first lens 64 and the second lens 65 have different exit pupil positions; the light projected from the image source 61 passes through the adjustment component and the projection lens to achieve different depth of field imaging.

[0056] The image display system provided in the embodiment of the present application is shown in FIG. Figure 1 , which is suitable for vehicle-mounted HUD systems and can be used to form virtual images with different depths of field, such as Figure 1 The distant virtual image 1a and the near virtual image 1b are shown in FIG.

[0057] Of course, through optical design, the image display system provided in the embodiment of the present application can also realize more virtual images with different depths of field.

[0058] The image display system provided in the embodiment of the present application includes an image source 61. Figure 2 The image source 61 is the starting point of the entire image display system and is responsible for generating projection light (or illumination light). These lights are the basis for subsequent projection imaging.

[0059] The image display system provided in the embodiment of the present application is compatible with various types of image sources 61. This compatibility enables the entire image display system to be flexibly applied to different types of vehicle-mounted HUD systems, meeting the diverse needs of different vehicle models and consumers.

[0060] The image source 61 may be a transmission type image source, such as a TFT image source, a reflective image source, such as a DMD, LCOS, etc., or a self-luminous image source, such as an LED, OLED, MicroLED, etc.

[0061] The image display system provided in the embodiment of the present application further includes an adjustment component. Figure 2 , the regulating component (see Figure 2 The controllable reflective transmission device 62 and the reflective element 63 in the image source 61 are used to divide the light projected from the image source 61 into at least two beams of light that do not overlap each other on the light propagation path, see Figure 2 The first light 6a and the second light 6b shown in FIG. This step is crucial because it provides a basis for realizing multi-focal plane imaging. Through the regulation of the regulating component, it can be ensured that the two or more light beams do not interfere with each other in the subsequent propagation process, and are used to form images with different depths of field.

[0062] The image display system provided in the embodiment of the present application further includes a projection lens. Figure 2 , the projection lens includes two lenses: a first lens 64 and a second lens 65, which respectively receive different beams of projection light from the adjustment component. For example, the first lens 64 receives the first light 6a, and the second lens 65 receives the second light 6b. It should be emphasized that the two lenses have different exit pupil positions, which means that they can direct the received light to different spatial positions, thereby forming virtual images with different depths of field within the observation range of the human eye 3 (see Figure 1 The distant virtual image 1a and the near virtual image 1b).

[0063] In the image display system provided in the embodiment of the present application, the light projected from the image source 61 is adjusted by the adjustment component and the projection lens guides different light beams separately, thereby finally forming images with different depths of field on the vehicle windshield 2 or other projection media. This design meets the needs of consumers for the vehicle HUD system to be able to display two or more images at a distance at the same time.

[0064] The image display system provided in the embodiment of the present application has multi-focal plane imaging capability. Through the cooperation of the adjustment component and the projection lens, the entire image display system can simultaneously generate and project multiple beams of light that do not overlap each other on the light propagation path, thereby forming multiple virtual images with different depths of field within the observation range of the human eye 3. This function significantly improves the information presentation capability and user experience of the vehicle-mounted HUD system using the image display system.

[0065] The image display system provided in the embodiment of the present application has the characteristics of compact structure and high integration. Although the image display system of the present application realizes the complex function of multi-focal plane imaging, its overall structure design is compact and highly integrated. This helps to reduce the volume and weight of the system and improve its applicability and reliability in a vehicle-mounted environment.

[0066] The image display system provided in the embodiment of the present application brings significant performance improvement and user experience optimization to the vehicle-mounted HUD system through innovative structural design and functional implementation.

[0067] It should be noted that the image display system provided in the embodiment of the present application, based on a special structural design, can project at least two beams of light, and different light beams will not interfere with or overlap each other on the propagation path.

[0068] In some examples of this application, see Figure 2 , the image display system also includes an optical waveguide component; the optical waveguide component at least includes a first optical waveguide plate 51 and a second optical waveguide plate 52; the first optical waveguide plate 51 has a first coupling area 5a, and the first coupling area 5a is arranged corresponding to the exit pupil position of the first lens 64; the second optical waveguide plate 52 has a second coupling area 5b, and the second coupling area 5b is arranged corresponding to the exit pupil position of the second lens 65.

[0069] It should be noted that in the image display system provided in the embodiment of the present application, the image source 61, the adjustment component and the projection lens together constitute the image display unit 6. In addition to the image display unit 6, the image display system of the present application also includes at least two optical waveguides.

[0070] In this example of the present application, the optical waveguide component includes two optical waveguide sheets. In fact, the optical waveguide component can also include more than two optical waveguide sheets, so that more than two virtual images can be formed at different depths of field. The number of optical waveguide sheets is not limited in the present application.

[0071] The first optical waveguide plate 51 has a first coupling region 5a, which is arranged corresponding to the exit pupil position of the first lens 64. When the first light 6a is emitted from the first lens 64 and reaches the first coupling region 5a, the first light 6a is coupled into the first optical waveguide plate 51 for total reflection transmission.

[0072] The second optical waveguide plate 52 has a second coupling region 5b, which is arranged corresponding to the exit pupil position of the second lens 65. Similarly, when the second light 6b is emitted from the second lens 65 and reaches the second coupling region 5b, it will be coupled into the second optical waveguide plate 52.

[0073] In this example of the present application, see Figure 2, the light generated by the image source 61 forms two light beams, namely, the first light beam 6a and the second light beam 6b, after passing through the adjustment component and the projection lens (including the first lens 64 and the second lens 65), wherein the first light beam 6a is guided to the first coupling-in area 5a of the first optical waveguide plate 51, and the second light beam 6b is guided to the second coupling-in area 5b of the second optical waveguide plate 52. The two optical waveguide plates can independently perform light transmission processing on the light they receive, and finally generate virtual images such as the distant virtual image 1a and the near virtual image 1b at different depths of field in front of the windshield 2, see Figure 1 This design not only ensures the synchronous display of near and far information, but also greatly improves the hierarchy and readability of the information, providing the driver with more intuitive and rich driving assistance information.

[0074] In the image display system provided in the embodiment of the present application, the optical waveguide component plays a vital role as one of the core components of the entire vehicle-mounted HUD system.

[0075] An important function of the optical waveguide component is beam expansion. When light is coupled into the corresponding optical waveguide plate, the light will be totally reflected in the optical waveguide plate and gradually expand, so the light emission area of ​​the image source 61 can be expanded through the optical waveguide plate.

[0076] In the present application, since the optical waveguide assembly has a beam expansion function, the light emission area of ​​the image source 61 can be expanded and the direction of the emitted light can be controlled, which helps to optimize the brightness and uniformity of the image, thereby improving the quality and clarity of the image.

[0077] It should be noted that by coupling light from different lenses (i.e., the first lens 64 and the second lens 65) in the first optical waveguide sheet 51 and the second optical waveguide sheet 52, independent display of two images at a distance and at a distance can be achieved. This design enables the vehicle-mounted HUD system to simultaneously display information at a distance and at a distance to the driver, thereby improving driving safety and convenience.

[0078] The design in this example of the present application is not limited to displaying two images, near and far, and the functions of the image display system can be expanded by adding more optical waveguides and corresponding lenses. For example, a HUD system with multiple projected images can be implemented to meet the display requirements in different scenarios.

[0079] In summary, the image display system in this example of the present application realizes independent display and high-quality display of near and far images by introducing an optical waveguide assembly (including a first optical waveguide sheet 51 and a second optical waveguide sheet 52). This design improves the flexibility and scalability of, for example, an in-vehicle HUD system and meets the needs of a variety of HUD systems.

[0080] In some examples of this application, see Figure 1 The first optical waveguide plate 51 and the second optical waveguide plate 52 are arranged at intervals along the light propagation direction, and are staggered perpendicular to the light propagation direction.

[0081] Since the two optical waveguides are spaced apart in the direction of light propagation and are also offset in the vertical direction, this ensures that two or more light beams projected from the image display unit can enter the corresponding optical waveguides independently. This arrangement avoids mutual interference between different light beams in the optical waveguides and ensures clarity and independence of the optical path.

[0082] It should be noted that the first coupling region 5a of the first optical waveguide plate 51 and the second coupling region 5b of the second optical waveguide plate 52 are arranged at intervals along the light propagation direction and are staggered perpendicular to the light propagation direction.

[0083] By using two or more optical waveguides, and each optical waveguide corresponds to a specific focal plane (i.e. different virtual image positions at different distances), the multi-focal plane display function of the vehicle HUD system can be realized. This meets the needs of consumers and car manufacturers for the HUD to display both distant and near images at the same time, improving the readability and safety of driving information.

[0084] In the present application, the staggered arrangement of the two optical waveguides also helps to optimize the propagation path of the light and reduce the loss of light in the optical waveguide, which can improve the light efficiency, allowing more light to reach the windshield 2 of the vehicle and be reflected to the human eye 3, thereby enhancing the brightness and clarity of the image.

[0085] In summary, the technical solution in which the first optical waveguide plate 51 and the second optical waveguide plate 52 are arranged at intervals along the light propagation direction and staggered in the vertical direction has significant technical effects in achieving multi-focal plane display, avoiding light beam interference, and improving light efficiency and image quality.

[0086] The optical waveguide assembly in the embodiment of the present application is mainly composed of at least two optical waveguide sheets arranged in a specific manner, each of which can be used to guide at least one beam of light, see Figure 2 At the same time, the light can be totally reflected and propagated in the corresponding optical waveguide.

[0087] The light transmission process of the optical waveguide is described as follows.

[0088] The incident light is coupled into the interior of the optical waveguide sheet by the coupling-in area of ​​the optical waveguide sheet, and the light is tilted inside the optical waveguide sheet, and then totally reflected inside the optical waveguide sheet. This feature ensures that the light can propagate along a preset path inside the optical waveguide sheet and will not escape easily. Since the light has a certain diffusion angle, it will gradually expand when it propagates in the optical waveguide sheet. This feature enables the optical waveguide sheet to expand the light from the image source 61, thereby forming a larger light-emitting area. When the light reaches the coupling-out area of ​​the optical waveguide sheet, a specific structure (grating structure) is designed so that the coupling-out area no longer meets the total reflection condition, and part of the light can be emitted from the coupling-out area. These emitted light rays are reflected by the subsequent reflection system 4 and the windshield 2 of the vehicle, and finally form a clear virtual image in front of the driver's eyes.

[0089] The design of the optical waveguide introduced in this application not only considers the guidance and expansion of light, but also focuses on the improvement of image quality and clarity. By precisely controlling the coupling-in and coupling-out positions of the optical waveguide and the propagation path of the light beam in the optical waveguide, the display quality and clarity of the image can be optimized.

[0090] It can be seen that the optical waveguide plays a vital role in the technical solution provided by this application. It is not only responsible for guiding and expanding the light beam, but also can realize the final multi-focal display and optimize the image quality and clarity. These characteristics enable the vehicle-mounted HUD system to provide richer and clearer driving assistance information, thereby improving the safety and convenience during driving.

[0091] In some examples of this application, see Figure 2 The adjustment component includes a controllable reflection and transmission device 62 and a reflection element 63; the controllable reflection and transmission device 62 is located between the image source 61 and the first lens 64, and can be switched between a transmission state and a reflection state; the reflection element 63 is arranged on the reflection path of the controllable reflection and transmission device 62, and is located on the light incident path of the second lens 65.

[0092] For some examples in this application, please continue to see Figure 2 When the controllable reflection and transmission device 62 is in a transmission state, the projection light generated by the image source 61 is transmitted through it to the first lens 64; when the controllable reflection and transmission device 62 is in a reflection state, the projection light generated by the image source 61 is reflected through it and reflected by the reflection element 63 to the second lens 65.

[0093] The image display system provided in the embodiment of the present application may only have one image source 61, which is responsible for generating projection light. The number of image sources is small, which can reduce production costs and weight.

[0094] The controllable reflection and transmission device 62 is arranged on the transmission path of the projection light generated by the image source 61, and it has a relatively characteristic feature, specifically, it can be switched between a transmission state and a reflection state.

[0095] When the controllable reflective transmission device 62 is in a transmission state, the light transmitted through the controllable reflective transmission device 62 can be directly directed to the first lens 64 at the rear. When the controllable reflective transmission device 62 is in a reflection state, the light can be reflected to the reflection element 63, and the reflection element 63 is used to direct the light to the second lens 65 at the rear. In other words, through the cooperation of the controllable reflective transmission device 62 and the reflection element 63, the light generated by the image source 61 can be divided into two beams for transmission respectively.

[0096] The first lens 64 and the second lens 65 are respectively located on the transmission path of the controllable reflection and transmission device 62 and the reflection path of the reflection element 63, and are responsible for focusing the two beams of light and guiding them to the coupling-in area of ​​the corresponding optical waveguide. Figure 2 , the first light 6a emitted by the first lens 64 is directed to the first coupling-in area 5a of the first optical waveguide plate 51. The second light 6b emitted by the second lens 65 is directed to the second coupling-in area 5b of the second optical waveguide plate 52. This realizes the flexible allocation of the light emitted by the same image source 61.

[0097] It can be seen that in this example of the present application, by switching the transmission and reflection states of the controllable reflection-transmission device 62, in combination with the reflection element 63, the switching of the two virtual images of near and far in the vehicle-mounted HUD system can be easily realized, which can meet the immediate needs for information of different distances during driving.

[0098] In some examples of the present application, when the controllable reflective-transmissive device 62 switches between the transmittance state and the reflective state, and the switching speed is greater than the reaction speed of the human eye, the human eye 3 can simultaneously see two virtual images at different depths of field.

[0099] The controllable reflective-transmissive device 62 can be switched between a transmissive state and a reflective state at high speed, and this characteristic is the key to realizing multi-focal plane display.

[0100] Specifically, the controllable reflective transmissive device 62 of the present application can switch from the transmissive state to the reflective state, or switch from the reflective state back to the transmissive state, in a very short time (usually much less than the perception threshold of the human eye). Since the reaction speed of the human eye is limited, it is usually unable to perceive changes in optical signals above a certain frequency. Therefore, when the switching speed of the controllable reflective transmissive device 62 exceeds this threshold, the human eye will not be able to distinguish whether the light beam is on the transmission or reflection path.

[0101] When the controllable reflection and transmission device 62 is in the transmission state, the light generated by the image source 61 enters the first optical waveguide sheet 51 through the first lens 64 to form a distant virtual image 1a. When the controllable reflection and transmission device 62 is switched to the reflection state, the light generated by the same image source 61 enters the second optical waveguide sheet 52 through the reflection element 63 and the second lens 65 to form a near virtual image 1b. In this process, due to the extremely fast switching speed, the human eye cannot perceive the switching process between the two virtual images, and thus two different virtual images can be seen at the same time.

[0102] By displaying two virtual images simultaneously, the driver can be provided with a richer information display method. For example, one virtual image can display navigation information while the other virtual image displays vehicle status information.

[0103] The multi-focus display function eliminates the need for drivers to frequently switch their line of sight or distract their attention to view different information sources, thereby improving driving safety and convenience.

[0104] In some examples of this application, see Figure 1 and Figure 2 The first coupling area 5a coincides with the exit pupil position of the first lens 64, and the first light 6a emitted through the first lens 64 is coupled to the first optical waveguide plate 51 through the first coupling area 5a; the second coupling area 5b coincides with the exit pupil position of the second lens 65, and the second light 6b emitted through the second lens 65 is coupled to the second optical waveguide plate 52 through the second coupling area 5b.

[0105] According to this example of the present application, see Figure 2 , the exit pupil position of the first lens 64 coincides with the first coupling-in area 5a of the first optical waveguide sheet 51, and the exit pupil position of the second lens 65 coincides with the second coupling-in area 5b of the second optical waveguide sheet 52. This design ensures that different beams of light emitted from the image display unit 6 can smoothly enter the corresponding optical waveguide sheet. Each beam of light can be effectively transmitted and diffused in the corresponding optical waveguide sheet. This optimization ensures that the light is transmitted in the optical waveguide sheet with minimal loss, which improves the utilization rate of the light beam and helps the vehicle-mounted HUD system to display virtual images with higher brightness, contrast and clarity.

[0106] Furthermore, the precise matching of the coupling-in area with the exit pupil position of the lens reduces the scattering and interference of light in the corresponding optical waveguide, thereby improving the purity and contrast of the image.

[0107] In addition, since the light is effectively diffused and controlled within the optical waveguide, the uniformity and consistency of the image are significantly improved.

[0108] In this example of the present application, the image display unit 6 has two exit pupil positions, and the design of the two exit pupil positions coinciding with the first coupling region 5a and the second coupling region 5b of the optical waveguide component respectively significantly improves the utilization rate of light, optimizes the image quality, and enhances the stability of the vehicle-mounted HUD system. These technical effects jointly improve the performance and user experience of the vehicle-mounted HUD system.

[0109] In some examples of the present application, the first optical waveguide plate 51 includes a first outcoupling region, and the second optical waveguide plate 52 includes a second outcoupling region; the first optical waveguide plate 51 is used to transmit the first light and expand the pupil for outcoupling in the first outcoupling region; the second optical waveguide plate 52 is used to transmit the second light and expand the pupil for outcoupling in the second outcoupling region.

[0110] See also Figure 2 The first optical waveguide plate 51 can, for example, transmit the first light 6a emitted by the image display unit 6, and realize pupil expansion outcoupling in its first outcoupling area. The second optical waveguide plate 52 can, for example, transmit the second light 6b emitted by the image display unit 6, and realize pupil expansion outcoupling in its second outcoupling area. The light is diffused or widened when outcoupling, forming a larger outgoing light spot or light beam. :

[0111] In the present application, by designing two optical waveguides separately, the entire image display system can more effectively manage and control the transmission paths and outcoupling methods of two different light beams, which helps to reduce interference between light beams, improve light utilization and the overall performance of the system.

[0112] In some examples of this application, see Figure 2 The controllable reflection and transmission device 62 is tilted relative to the optical axis of the first lens 64; the reflection element 63 is tilted relative to the optical axis of the second lens 65; the controllable reflection and transmission device 62 and the reflection element 63 are arranged up and down.

[0113] By tilting the controllable reflective transmission device 62 and the reflective element 63, the image display system can more flexibly control the propagation direction and path of the light, which is crucial for achieving a specific optical effect, optimizing imaging quality or improving the utilization of light.

[0114] The top-and-bottom layout helps save space, making the entire image display system more compact and efficient. This is particularly beneficial for optical applications that require miniaturization or integration.

[0115] According to another embodiment of the present application, a vehicle-mounted HUD system is provided. Figure 1, which includes the image display system as described above, as well as a reflection system 4 and a windshield 2 of a vehicle; the reflection system 4 is used to receive the projection light projected from the image display system, and reflect the light to the windshield 2; the windshield 2 reflects the light beam from the reflection system 4 to the human eye 3, and at the same time, the reverse extension line of the light beam forms a virtual image at different depths of field in front of the windshield 2.

[0116] The vehicle-mounted HUD system provided by the embodiment of the present application improves the limitation of the traditional HUD system that can only display single focal plane information, making the driving experience smoother and more comfortable. Specifically, the driver can obtain the near and far information in front of the vehicle at the same time, thereby improving the safety during driving.

[0117] The vehicle-mounted HUD system provided in the embodiment of the present application realizes the simultaneous display of information at different distances by introducing a specially configured image display system, which not only improves driving safety and convenience, but also optimizes the application effect of optical waveguide technology. At the same time, the vehicle-mounted HUD system has technical advantages such as strong compatibility, high flexibility, and clear image quality, and has broad market prospects and application potential.

[0118] In the vehicle-mounted HUD system provided in the embodiment of the present application, the reflection system 4 may be a curved surface reflection system.

[0119] The reflection system 4 in the present application is not limited to a single-curved surface HUD system, but may also be a hyperbolic or multi-curved surface HUD system, and this is not specifically limited in the present application.

[0120] According to another embodiment of the present application, a vehicle is further provided, comprising a vehicle body and the vehicle-mounted HUD system as described above, wherein the vehicle body comprises a windshield 2, and the vehicle-mounted HUD system is arranged on the vehicle body.

[0121] The specific implementation of the vehicle in the embodiment of the present application can refer to the above-mentioned embodiments of the image display system and the vehicle-mounted HUD system, so it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0122] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0123] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. An image display system, characterized in that: comprising an image display unit (6); The image display unit (6) comprises an image source (61), an adjustment component and a projection lens; The image source (61) is used to generate projection light; The adjustment component is used to divide the projection light into at least two beams of light that do not overlap each other on the light propagation path; The projection lens comprises a first lens (64) and a second lens (65), wherein the first lens (64) and the second lens (65) are respectively used to receive different beams of projection light emitted from the adjustment component, and the first lens (64) and the second lens (65) have different exit pupil positions; Light projected from the image source (61) passes through the adjustment component and the projection lens to achieve imaging with different depths of field.

2. The image display system according to claim 1, characterized in that: The image display system also includes an optical waveguide assembly; The optical waveguide component at least comprises a first optical waveguide sheet (51) and a second optical waveguide sheet (52); The first optical waveguide plate (51) has a first coupling-in area (5a), and the first coupling-in area (5a) is arranged corresponding to the exit pupil position of the first lens (64); The second optical waveguide plate (52) has a second coupling-in area (5b), and the second coupling-in area (5b) is arranged corresponding to the exit pupil position of the second lens (65).

3. The image display system according to claim 2, characterized in that: The first optical waveguide sheet (51) and the second optical waveguide sheet (52) are arranged at intervals along the light propagation direction, and are arranged in a staggered manner perpendicular to the light propagation direction.

4. The image display system according to claim 2, characterized in that: The adjustment component comprises a controllable reflection and transmission device (62) and a reflection element (63); The controllable reflection and transmission device (62) is located between the image source (61) and the first lens (64), and is capable of switching between a transmission state and a reflection state; The reflective element (63) is arranged on the reflective path of the controllable reflective-transmissive device (62) and is located on the light incident path of the second lens (65).

5. The image display system according to claim 4, characterized in that: When the controllable reflection and transmission device (62) is in a transmission state, the projection light generated by the image source (61) is transmitted through it to the first lens (64); When the controllable reflective-transmissive device (62) is in a reflective state, the projection light generated by the image source (61) is reflected by it and is reflected by the reflective element (63) to the second lens (65).

6. The image display system according to claim 5, characterized in that: When the controllable reflection and transmission device (62) switches between the transmission state and the reflection state, and the switching speed is greater than the reaction speed of the human eye, the human eye (3) can simultaneously see two virtual images located at different depths of field.

7. The image display system according to claim 2, characterized in that: The first coupling region (5a) coincides with the exit pupil position of the first lens (64), and the first light (6a) emitted by the first lens (64) is coupled into the first optical waveguide plate (51) through the first coupling region (5a); The second coupling region (5b) and the exit pupil position of the second lens (65) coincide with each other, and the second light (6b) emitted through the second lens (65) is coupled into the second optical waveguide plate (52) through the second coupling region (5b).

8. The image display system according to claim 7, characterized in that: The first optical waveguide plate (51) comprises a first outcoupling region, and the second optical waveguide plate (52) comprises a second outcoupling region; The first optical waveguide plate (51) is used to transmit the first light and couple out the light by pupil expansion in the first outcoupling area; The second optical waveguide plate (52) is used for transmitting the second light and coupling out in a pupil-expanding manner in the second outcoupling area.

9. The image display system according to claim 4, characterized in that: The controllable reflection and transmission device (62) is arranged at an angle relative to the optical axis of the first lens (64); The reflective element (63) is arranged to be inclined relative to the optical axis of the second lens (65); The controllable reflection and transmission device (62) and the reflection element (63) are arranged one above the other.

10. A vehicle-mounted HUD system, characterized in that: Comprising an image display system, a reflection system (4) and a vehicle windshield (2) as claimed in any one of claims 1 to 9; The reflection system (4) is used to receive the projection light projected from the image display system and reflect the light to the windshield (2); The windshield (2) reflects the light beam from the reflection system (4) to the human eye (3), and at the same time, the reverse extension line of the light beam forms a virtual image at different depths of field in front of the windshield (2).

11. A vehicle, characterized in that: include: A vehicle body, including a windshield (2); and The vehicle-mounted HUD system as described in claim 10, wherein the vehicle-mounted HUD system is arranged on the vehicle body.

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