Reflection unit for panoramic head-up display and panoramic head-up display system

Abstract

The utility model relates to a reflection unit for panoramic head-up display and a panoramic head-up display system. In one aspect, there is provided a reflection unit for panoramic head-up display, including: a reflection portion configured to be disposed on a side of a lower region of a windshield glass of a vehicle inside the vehicle to reflect image light emitted from an image display unit for panoramic head-up display; and the fixing part is configured to fix the reflecting part to form a non-zero included angle relative to the windshield glass. Therefore, the image display unit does not interfere with the vehicle part while a good imaging effect is obtained.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a reflection unit for a panoramic head-up display and a panoramic head-up display system. Background Art

[0002] Panoramic Head-Up Display (PHUD) is a driving assistance technology used in vehicles and other transportation tools. It is used to project information such as vehicle speed, engine speed, and remaining fuel onto the windshield of the vehicle so that the driver can obtain this information while maintaining continuous attention to road conditions.

[0003] The equipment related to PHUD generally includes an image display unit for providing image light carrying the above-mentioned information, and the image display unit is installed on the dashboard of the vehicle to project the image light emitted from the image display unit to the lower area of ​​the windshield, thereby forming a virtual image in front of the lower area of ​​the windshield through reflection from the lower area for observation by the driver.

[0004] Since the position and posture of the windshield relative to the driver's eyes are fixed, in order to form the virtual image at a suitable position, the image display unit must be arranged in a specific area of ​​the instrument panel. However, the available space for the instrument panel is limited. Therefore, when the image display unit is arranged in place on the instrument panel, it is easy to interfere with parts in the vehicle, such as the front of the vehicle body, thereby affecting the imaging effect. In this way, the space in the vehicle needs to be modified to eliminate this interference, which will increase the complexity of the vehicle design and thus increase the manufacturing cost. Utility Model Content

[0005] This section provides a general summary of the disclosure, and is not a comprehensive disclosure of its full scope or all of its features.

[0006] The object of the present disclosure is to provide a reflection unit for a PHUD that can achieve good imaging effects while avoiding interference between an image display unit and vehicle parts.

[0007] In order to achieve the above object, according to one aspect of the present disclosure, a reflection unit for a PHUD is provided, comprising:

[0008] a reflecting portion configured to be arranged on a side of a lower region of a windshield of a vehicle at an interior of the vehicle to reflect image light emitted from an image display unit for a PHUD; and

[0009] The fixing portion is configured to fix the reflecting portion to form a non-zero angle relative to the windshield.

[0010] In the above-mentioned embodiment, the fixing portion can be configured to be arranged on a first side of the reflecting portion close to the windshield when the reflecting portion is fixed, so as to fix the reflecting portion to the windshield, or, the fixing portion can be configured to be arranged on a second side of the reflecting portion away from the windshield when the reflecting portion is fixed and fixedly connected to the dashboard of the vehicle, so as to fix the reflecting portion between the windshield and the fixing portion.

[0011] In the above embodiment, the fixing portion may be configured to be able to adjust the angle.

[0012] In the above embodiment, the fixed part may include a first bracket, a second bracket and a rotating part connected to the first bracket and the second bracket, the first bracket is configured to be fixed to the dashboard of the vehicle, the second bracket is configured to fix the reflecting part, and the rotating part is configured so that the second bracket can rotate around the rotating part to adjust the angle.

[0013] In the above embodiment, the reflecting portion can be provided with a reflecting film on the side away from the windshield when it is fixed, and the reflecting film is a P-light reflecting film for reflecting only P-light, an S-light reflecting film for reflecting only S-light, or a P-light-S-light reflecting film for reflecting both P-light and S-light.

[0014] In the above embodiment, the reflective portion may be provided with a light absorbing film on a side close to the windshield when the reflective portion is fixed.

[0015] In the above embodiment, the reflecting portion may be a one-piece lens, or may be a spliced ​​lens formed by splicing a plurality of lenses, or may be a plurality of lenses arranged to be spaced apart in the lateral direction of the windshield.

[0016] According to another aspect of the present disclosure, a PHUD system is also provided, comprising:

[0017] an image display unit configured to emit image light; and

[0018] The reflection unit for PHUD according to any one of the above embodiments.

[0019] In the above embodiment, the reflecting portion may be provided with a reflecting film on a side away from the windshield when the reflecting portion is fixed, wherein the image display unit may be configured to emit image light as P light, and the reflecting film is a P light reflecting film for reflecting only P light; or, the image display unit may be configured to emit image light as S light, and the reflecting film is an S light reflecting film for reflecting only S light; or, the image display unit may be configured to emit image light as natural light, and the reflecting film is a P light S light reflecting film for reflecting both P light and S light; or, the image display unit may be configured to emit image light as S light, and the reflecting film is a P light reflecting film or a P light S light reflecting film, and the PHUD system may further include a polarization conversion device, which is arranged on the light emitting side of the image display unit, for converting the image light to be incident on the reflecting portion into P light.

[0020] In the above embodiment, the image display unit may be a one-piece display screen, or may be a spliced ​​display screen formed by splicing a plurality of display screens, or may be a plurality of display screens arranged at intervals in the lateral direction of the windshield.

[0021] In the above embodiment, the PHUD system may further include a moving device configured to enable the image display unit to move along the direction of its main light beam.

[0022] According to the above technical solution, by providing a reflective unit and fixing the reflective portion of the reflective unit to form a non-zero angle relative to the windshield through the fixing portion of the reflective unit, the adjustable area of ​​the image display unit can be made larger while still ensuring that the virtual image is formed at a suitable position, and thus the image display unit can be installed so as not to interfere with vehicle parts while the virtual image is formed at a suitable position. Thus, a good imaging effect can be achieved without modifying the space in the vehicle, and thus it is possible to avoid increasing the complexity of vehicle design and increasing manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The features and advantages of the embodiments of the present disclosure will become more easily understood through the following description with reference to the accompanying drawings. The drawings are not drawn to scale and some features may be exaggerated or reduced to show details of particular components.

[0024] In the attached picture:

[0025] Figure 1 The figure is a schematic diagram showing the arrangement position of the image display unit when the windshield is used to reflect the image light.

[0026] Figure 2 It is a structural schematic diagram of a panoramic head-up display system according to an embodiment of the present disclosure.

[0027] Figure 3To show Figure 2 Schematic diagram of the optical path of the panoramic head-up display system shown in .

[0028] Figure 4 Another schematic diagram showing a panoramic head-up display system according to an embodiment of the present disclosure.

[0029] Figure 5 It is a schematic diagram showing the arrangement position of the image display unit when the reflection unit according to the embodiment of the present disclosure is used to reflect the image light.

[0030] Figure 6 It is a schematic structural diagram of a reflection unit according to an embodiment of the present disclosure.

[0031] Figure 7 It is a schematic structural diagram of a reflection unit according to another embodiment of the present disclosure.

[0032] Figure 8 It is a schematic structural diagram of a fixing part of a reflection unit according to another embodiment of the present disclosure.

[0033] Fig. 9 It is a schematic structural diagram of a fixing part of a reflection unit according to another embodiment of the present disclosure.

[0034] Fig.10 It is a schematic diagram showing the change of polarization state of image light of the panoramic head-up display system according to an embodiment of the present disclosure.

[0035] Fig.11 The figure is a schematic diagram showing the change of polarization state of image light of a panoramic head-up display system according to another embodiment of the present disclosure.

[0036] Fig.12 It is a structural schematic diagram of a panoramic head-up display system according to another embodiment of the present disclosure.

[0037] Fig.13 FIG. 4 is a schematic diagram showing the change in polarization state of image light of a panoramic head-up display system according to yet another embodiment.

[0038] Fig.14 The diagram is a schematic diagram showing the change in polarization state of image light of a panoramic head-up display system according to yet another embodiment of the present disclosure.

[0039] Fig.15 It is a schematic structural diagram of a reflection part according to an embodiment of the present disclosure.

[0040] Fig.16 It is a schematic structural diagram of a reflection part according to another embodiment of the present disclosure.

[0041] Fig.17It is a schematic structural diagram of a reflection part according to another embodiment of the present disclosure.

[0042] Fig.18 Schematic diagram of the structure of an image display unit according to an embodiment of the present disclosure.

[0043] Fig.19 4 is a schematic structural diagram of an image display unit according to another embodiment of the present disclosure.

[0044] Fig. 20 It is a schematic diagram showing the position change of the image display unit of the panoramic head-up display system according to yet another embodiment of the present disclosure.

[0045] Fig.21 It is a schematic structural diagram of a mobile device according to an embodiment of the present disclosure.

[0046] In the drawings, the same or corresponding technical features or components are represented by the same or corresponding reference numerals. DETAILED DESCRIPTION

[0047] The present disclosure is described in detail below with reference to the accompanying drawings by means of exemplary embodiments. It should be noted that the following detailed description of the present disclosure is only for illustrative purposes and is by no means a limitation of the present disclosure.

[0048] It should be noted that, for the sake of clarity, not all features of a specific implementation are described and illustrated in the specification and drawings. Furthermore, in order to avoid unnecessary details that obscure the technical solution that the present disclosure focuses on, only the device structure closely related to the technical solution of the present disclosure is described and illustrated in the specification and drawings, while other details that are not closely related to the technical content of the present disclosure and are known to those skilled in the art are omitted.

[0049] Reference Figure 1 The image display unit 10' is usually installed on the dashboard of the vehicle (not shown, only the installation position of the image display unit 10' is shown), for example, installed in a recess set on the surface of the dashboard, and is used to emit image light S' carrying display information. The image light S' emitted from the image display unit 10' is projected onto the lower area of ​​the windshield 2', for example, the black border area of ​​the windshield 2', and enters the eye box 3' through reflection from the lower area, so that in front of the lower area of ​​the windshield 2' (that is, Figure 1 A virtual image 4' is formed on the left side of the windshield 2' for a user, such as a driver, to observe, wherein the eye box 3' refers to the range within which the user's eyes can move in a certain space while keeping the image seen clear and complete.

[0050] Usually, after the image display unit 10' is installed in place, the main light direction of the image light S' emitted by it is determined and cannot be adjusted. In this case, since the position and posture of the windshield 2' relative to the eye box 3' are fixed, in order to form the virtual image 4' at a suitable position, for example, by projecting the image light S' onto the black edge area of ​​the windshield 2' and reflecting it to the eye box 3', to form the virtual image 4' at the suitable position, the image display unit 10' for emitting the image light S' must be arranged in a specific area of ​​the dashboard. However, the space available for arrangement of the dashboard is limited, and the image display unit 10' is prone to interfere with parts in the vehicle when it is arranged in place on the dashboard. Figure 1 As shown in FIG. 4 , in order to form a virtual image 4′ Figure 1 In the position shown in FIG. 1 , the image display unit 10' must be arranged close to the windshield 2', thereby interfering with the vehicle body enclosure 5'. Thus, in order to prevent the image light S' emitted by the image display unit 10' from being interfered by vehicle parts such as the vehicle body enclosure 5' that interfere with the image display unit 10', so as to achieve a normal imaging effect, the space inside the vehicle must be modified to eliminate such interference, which in turn increases the complexity of vehicle design and thus increases manufacturing costs.

[0051] In this regard, according to an embodiment of the present disclosure, a reflection unit for panoramic head-up display is provided. Figures 2 to 9 The reflection unit 20 according to the embodiment of the present disclosure will be described.

[0052] The reflection unit 20 includes a reflection part 201 and a fixing part 202 (in Figures 6 to 9 ).

[0053] Reference Figure 2 and Figure 3 The reflecting portion 201 is configured to be arranged on a side of a lower area of ​​a windshield 2 of a vehicle (not shown) inside the vehicle to reflect the image light S emitted from the image display unit 10 for panoramic head-up display.

[0054] The side of the lower region of the windshield 2 inside the vehicle can also be considered as the rear of the lower region of the windshield 2, that is, Figure 2The reflective portion 201 is disposed on the right side of the windshield 2. By being disposed on this side of the windshield 2, the reflective portion 201 can reflect the image light S emitted from the image display unit 10 to the eye box 3, so as to form a virtual image 4 on the reverse extension line (shown by a dotted line) of the reflected light S1 propagating from the reflection points (e.g., P1 and P2) on the reflective portion 201 to the eye box 3. It can be understood that the reflection points P1 and P2 are only the contour points that contact the reflective portion 201 when the entire image light S is incident on the reflective portion 201, and the actual reflected light S1 is all the reflected light between the two reflected light rays formed respectively via the reflection point P1 and the reflection point P2.

[0055] Reference Figure 4 The fixing portion 202 is configured to fix the reflecting portion 201 to form a non-zero angle β relative to the windshield 2 .

[0056] That is, the reflecting surface provided by the reflecting portion 201 forms an angle β with respect to the reflecting surface provided by the windshield 2 , or in other words, the reflecting portion 201 can be fixed by the fixing portion 202 to be inclined with respect to the windshield 2 .

[0057] In this way, the adjustable area of ​​the image display unit 10 can be made larger while still ensuring that the virtual image 4 is formed in a suitable position, and thus the image display unit 10 can be installed so as not to interfere with vehicle parts while the virtual image 4 is formed in a suitable position. Figure 1 , Figure 4 and Figure 5 , when the formation position of the virtual image 4 remains unchanged, compared with the installation position of the image display unit 10 in the case of using the windshield 2 to reflect the image light S, when the reflecting portion 201 is provided at an angle β with the windshield 2, the installation position of the image display unit 10 can be set to be farther from the windshield 2. In this way, the image display unit 10 can be prevented from interfering with vehicle parts by setting a suitable angle, for example, Figure 5 As shown in , the image display unit 10 can be installed away from the windshield 2, so it can not interfere with the vehicle body enclosure 5. Therefore, it is possible to achieve a normal imaging effect without modifying the space in the vehicle, and thus it is possible to avoid increasing the complexity of vehicle design and increasing manufacturing costs.

[0058] The size of the angle β may be determined based on the amount of interference between the installed image display unit 10 and parts of the vehicle when the image light S is reflected by the windshield 2 .

[0059] For example, in the case where there is interference between the image display unit 10 and the vehicle body enclosure 5, the size of the angle β can be determined based on the specific amount of interference. The amount of interference can be, for example, the length of the overlapping area between the image display unit 10 and the vehicle part in the longitudinal direction of the vehicle (i.e., the length direction of the vehicle body). In this case, by moving the image display unit 10 along the longitudinal direction by the above-mentioned length, the image display unit 10 can no longer interfere with the vehicle part. Thus, the size of the angle β can be determined by the length, so that when the reflecting portion 201 is set at the angle β relative to the windshield 2, the image display unit 10 can be arranged so as not to interfere with the vehicle part.

[0060] Exemplarily, the angle β may be in the range of −10° to 0 and 0 to 10°. In this way, a larger adjustable or arrangeable area for the image display unit 10 may be obtained on the instrument panel.

[0061] In some embodiments, reference Figure 6 The fixing portion 202 may be arranged on a side of the reflecting portion 201 close to the windshield 2 when the reflecting portion 201 is fixed, also referred to as the first side 201a (see Figure 4 ) to fix the reflecting portion 201 to the windshield 2, for example, by glue.

[0062] For example, Figure 6 As shown in , the fixing part 202 may include a first fixing member 202a and a second fixing member 202b, and the first fixing member 202a and the second fixing member 202b are both arranged in the non-imaging area of ​​the reflecting part 201, and are respectively arranged at both ends of the reflecting part 201. The opposite sides of each of the first fixing member 202a and the second fixing member 202b, that is, the two sides respectively contacting the reflecting part 201 and the windshield 2, may be provided with glue, for example, to connect the reflecting part 201 to the windshield 2, and at this time, there is a gap between the imaging area of ​​the reflecting part 201 and the windshield 2 to form an angle β.

[0063] For example, the fixing portion 202 may be in a wedge shape, for example, the first fixing member 202a and the second fixing member 202b may be in the same wedge shape, so that the reflecting portion 201 forms a non-zero angle with respect to the windshield 2. Alternatively, the fixing portion 202 may also be in other shapes, as long as the reflecting portion 201 forms a non-zero angle with respect to the windshield 2.

[0064] In some embodiments, reference Figure 7 The fixing portion 202 may be arranged on a side of the reflecting portion 201 away from the windshield 2 when the reflecting portion 201 is fixed, also referred to as the second side 201b (see Figure 4 ) and is fixedly connected to a dashboard 5 of a vehicle so as to fix the reflecting portion 201 between the windshield 2 and the fixing portion 202.

[0065] For example, Figure 7 As shown in , similarly, the fixing portion 202 may include a first fixing member 202a and a second fixing member 202b, both of which are arranged in the non-imaging area of ​​the reflecting portion 201 and are respectively arranged at both ends of the reflecting portion 201. Each of the first fixing member 202a and the second fixing member 202b is L-shaped, wherein the vertical portion of the L-shape is fixed to the second side 201b of the reflecting portion 201, for example, by glue or other means, and the horizontal portion of the L-shape is fixedly connected to the instrument panel 5, so that the reflecting portion 201 is fixed between the windshield 2 and the vertical portion of the L-shape, and at this time, there is a gap between the imaging area of ​​the reflecting portion 201 and the windshield 2 to form an angle β.

[0066] Exemplarily, the vertical portion of the L-shape may form a specific angle with the horizontal portion. For example, the vertical portion of the L-shape of the first fixing member 202a and the second fixing member 202b may form the same specific angle with the corresponding horizontal portion, so that when the horizontal portion is fixed to the dashboard 5, the vertical portion forms a non-zero angle relative to the windshield 2.

[0067] In some embodiments, the fixing portion 202 may be configured to be able to adjust the angle β.

[0068] For example, refer to Figure 8 and Fig. 9 The fixing portion 202 may include a first bracket 2021, a second bracket 2022, and a rotating portion 2023 connected to the first bracket 2021 and the second bracket 2022, the first bracket 2021 being configured to be fixed to a dashboard 5 of a vehicle, the second bracket 2022 being configured to fix the reflecting portion 201, and the rotating portion 2023 being configured to enable the second bracket 2022 to rotate around the rotating portion 2023 to adjust the angle β.

[0069] Specifically, the reflecting portion 201 is fixed on the second bracket 2022 so that its second side 201b for reflecting the image light S faces the second bracket 2022. Figure 8 As shown in FIG. , the reflective portion 201 may be fixed to the second bracket 2022 via the second side 201b by glue, or as Fig. 9 As shown in FIG. , the reflective portion 201 may be fixed to the second bracket 2022 by a fixing structure 2024 disposed on the second bracket 2022, for example, Fig. 9In the embodiment, the fixing structure 2024 fixes the reflecting part 201 to the second bracket 2022 by clamping the reflecting part 201 between the fixing structure 2024 and the second bracket 2022. In addition, the rotating part 2023 may be, for example, a roller, which can drive the second bracket 2022 connected thereto to rotate by its own rotation. Thus, the second bracket 2022 can be rotated around the rotating part 2023, and thus the angle β of the reflecting part 201 fixed to the second bracket 2022 relative to the windshield 2 can be adjusted.

[0070] It is conceivable that Figure 6 and Figure 7 Similar to the situation in FIG. 1 , the fixing portion 202 may also include two fixing members, and each fixing member may have the following Figure 8 and Fig. 9 The configuration shown in .

[0071] By providing a fixing portion 202 capable of adjusting the angle β, for various vehicle models, the angle β can be adjusted by means of the fixing portion 202 to obtain an angle of appropriate size, so that the installed image display unit 10 will not interfere with vehicle parts. For example, the size of the required angle can be determined based on the amount of interference between the installed image display unit 10 and the parts of the vehicle when the image light S is reflected through the windshield 2, and then the angle of the reflecting portion 201 relative to the windshield 2 can be adjusted by means of the fixing portion 202 according to the determined size of the required angle. In this way, the reflecting unit 20 can be applied to various vehicle models with different interior space designs.

[0072] The reflective portion 201 may be made of plastic or glass, for example, may be a plastic lens or a glass lens.

[0073] In some embodiments, the reflecting portion 201 may be provided with a reflecting film 203 on the side away from the windshield 2 when it is fixed, i.e., the second side 201b, and the reflecting film 203 is a P-light reflecting film for reflecting only P-light, an S-light reflecting film for reflecting only S-light, or a P-light and S-light reflecting film for reflecting both P-light and S-light.

[0074] The sunglasses worn by the driver are usually polarized glasses, which filter out the road reflected light, which is mainly S light, the glass surface reflected light, etc., to reduce glare, but allow P light to pass through to provide a good visual experience. However, the image light emitted by the image display unit 10 can be P light, S light or natural light, so there may be adaptability issues for polarized glasses that only allow P light to pass through.

[0075] By providing a reflective film 203 on the second side 201b of the reflective portion 201, i.e., on the optical surface of the reflective portion 201, for example, a P-light reflective film, or a P-light S-light reflective film, the image light incident on the polarized glasses can be P-light, or P-light and S-light, so that the image light incident on the polarized glasses can pass through the polarized glasses and enter the human eye, thereby achieving the adaptation of the PHUD to the polarized glasses. In addition, by providing a reflective film 203 on the second side 201b of the reflective portion 201, for example, a P-light reflective film, or an S-light reflective film, the light effect can also be enhanced, and the eye brightness of the PHUD can be improved.

[0076] In addition, the reflective film 203 can be disposed on the second side 201b of the reflective portion 201 by coating, laminating, etc. Compared with the reflective film disposed on the windshield 2, when the reflective film 203 is disposed on the reflective portion 201, the size of the reflective film 203 can be smaller, thereby making the transportation and coating of the reflective film 203 simpler and more convenient.

[0077] For example, refer to Fig.10 When the image display unit 10 is configured to emit image light S as P light (whose polarization direction is shown by a double arrow line), the reflective film 203 can be configured as a P light reflective film for reflecting only P light. In this way, not only can the adaptation problem of polarized glasses be solved, but also the light effect can be improved.

[0078] For example, refer to Fig.11 When the image display unit 10 is configured to emit image light S as S light (since the polarization directions of S light and P light are perpendicular, the polarization direction of S light is perpendicular to the paper surface and is shown as dots), without considering the adaptation problem of polarized glasses, the reflective film 203 can be set as an S light reflective film for reflecting only S light. In this way, the light effect can be improved.

[0079] For example, refer to Fig.12 and Fig.13 When the image display unit 10 is configured to emit image light S as S light, a polarization conversion device 30, such as a polarizer, can be provided on the light-emitting side of the image display unit 10 to convert the image light S to be incident on the reflective portion 201 into P light. At this time, the reflective film 203 can be provided as a P light reflective film, thereby not only solving the adaptation problem of polarized glasses but also improving the light effect. Optionally, the reflective film 203 can also be provided as a P light S light reflective film to reflect both P light and S light, thereby not only solving the adaptation problem of polarized glasses and improving the light effect by reflecting P light, but also reflecting the S light that is not completely converted when converted by means of the polarization conversion device 30 to the eye box 3, thereby further improving the eye brightness.

[0080] For example, refer to Fig.14When the image display unit 10 is configured to emit image light S as natural light, the reflective film 203 can be set as a P-light S-light reflective film. In this way, not only can the adaptation problem of polarized glasses be solved, but also the light effect can be improved.

[0081] In PHUD, in order to ensure the display effect in bright environment and improve the visibility and clarity of the displayed image, the imaging area of ​​the windshield is usually blackened. Since the position and size of the black border area of ​​the windshield of different models are different, the windshields of different models need to be processed separately, for example, the size of the black border area is adjusted, painted, coated, filmed, etc., which increases the complexity of the processing and increases the cost.

[0082] In this regard, in some embodiments, the reflective portion 201 may be provided with a light absorbing film on a side close to the windshield 2 when the reflective portion 201 is fixed, that is, the first side 201 a .

[0083] The light absorbing film may be obtained by spraying, pasting or coating, and it can effectively absorb the light incident on the first side 201a of the reflective portion 201. For example, the reflectivity of the first side 201a provided with the light absorbing film may be less than or equal to 10%. In this way, the contrast of the image in a bright environment can be effectively improved, thereby improving the visibility and clarity of the displayed image. At the same time, since the light absorbing film can also absorb the image light S that penetrates the reflective portion 201, the occurrence of ghosting can also be avoided.

[0084] On the other hand, the method of providing a light absorbing film on the reflective part 201 to improve the display effect in a bright environment does not need to consider the problem of different blackening treatments caused by differences in vehicle models, but can be applied to various vehicle models. Thus, the complexity of the treatment can be reduced and costs can be saved.

[0085] In some embodiments, reference Fig.15 The reflective portion 201 may be a one-piece lens. The image displayed by the one-piece lens can be complete and coherent, thereby providing a good display effect.

[0086] In the case where the imaging area of ​​the image display unit 10 is large, if the correspondingly large size of the reflective portion 201 is matched, the display area of ​​the PHUD will also be correspondingly large. Based on this, it can be imagined that the reflective portion 201 is configured to extend substantially over the entire range of the windshield 2 in its lateral direction, thereby providing a panoramic display that almost spans the entire length of the windshield 2.

[0087] In some embodiments, reference Fig.16The reflective portion 201 may also be a spliced ​​lens formed by splicing a plurality of lenses. The spliced ​​lens can also provide a complete display image, and because it has a lower manufacturing precision requirement, it can have a lower manufacturing cost.

[0088] In some embodiments, reference Fig.17 The reflecting portion 201 may also be a plurality of lenses arranged at intervals in the lateral direction of the windshield 2. In this case, the image display unit 10 may be a plurality of display screens arranged to correspond one-to-one with the plurality of lenses, so that the image light emitted by each display screen can be reflected by a corresponding lens.

[0089] Compared with an integrated lens, for example, a one-piece lens and a spliced ​​lens, providing a plurality of separate lenses makes the assembly of the reflective portion 201 simpler and more convenient. Moreover, considering the surface characteristics of the windshield 2, providing a plurality of separate lenses also makes it possible to adjust the angle between each lens and the windshield 2 individually, thereby obtaining a better display effect.

[0090] According to another aspect of the present disclosure, referring to Figure 2 and Figure 4 , a panoramic head-up display system 1 is also provided. The panoramic head-up display system 1 comprises an image display unit 10 configured to emit image light S and the above-mentioned reflection unit 20 for panoramic head-up display.

[0091] In some embodiments, reference Figures 10 to 14 , the reflecting portion 201 of the reflecting unit 20 may be provided with a reflecting film 203 on a side away from the windshield 2 when it is fixed, wherein the image display unit 10 may be configured to emit an image light S as P light, and the reflecting film 203 is a P light reflecting film for reflecting only the P light; or, the image display unit 10 may be configured to emit an image light S as S light, and the reflecting film 203 is an S light reflecting film for reflecting only the S light; or, the image display unit 10 may be configured to emit an image light S as natural light, and the reflecting film 203 is a P light S light reflecting film for reflecting both P light and S light; or, the image display unit 10 may be configured to emit an image light S as S light, and the reflecting film 203 is a P light reflecting film or a P light S light reflecting film, and the panoramic head-up display system 1 further includes a polarization conversion device 30, which is arranged on the light emitting side of the image display unit 10, for converting the image light S to be incident on the reflecting portion 201 into P light.

[0092] The image display unit 10 is generally a display screen using, for example, a thin film transistor liquid crystal display (TFT-LCD) or a micro light emitting diode (Micro-LED) display technology.

[0093] In some embodiments, reference Fig.18 The image display unit 10 may be a single-piece display screen, or the image display unit 10 may be a spliced ​​display screen formed by splicing a plurality of display screens, for example, a plurality of display screens are configured to be spliced ​​in the transverse direction of the windshield to form a spliced ​​display screen, or, referring to Fig.19 The image display unit 10 may be a plurality of display screens arranged at intervals in the lateral direction of the windshield.

[0094] It can be understood that the reflective portion 201 is a one-piece lens (such as Fig.18 and Fig.19 In the case of a spliced ​​lens (as shown in FIG. 1 ) or a spliced ​​lens, the image display unit 10 may be a spliced ​​display screen or a plurality of display screens arranged at intervals. The plurality of display screens of the spliced ​​display screen or the plurality of display screens arranged at intervals may emit the same or different image light and project it to different areas of the reflective portion 201 to form the same or different images via the reflective portion 201.

[0095] In some embodiments, Fig.17 As shown in , in the case where the reflecting portion 201 is configured as a plurality of lenses arranged at intervals in the lateral direction of the windshield 2, the image display unit 10 can be a plurality of display screens configured as a plurality of lenses arranged at intervals in the lateral direction of the windshield 2 and corresponding one-to-one to the plurality of lenses.

[0096] In this way, except for the description Fig.17 The advantages mentioned when showing the content in the figure are that multiple display screens and corresponding multiple lenses are set up, so that different content can be displayed for different users, such as a driver and a user in the co-pilot seat. For example, driving-related information is displayed to the driver, and entertainment information is displayed to the user in the co-pilot seat.

[0097] In some embodiments, reference Fig. 20 and Fig.21 The PHUD system may further include a moving device 40 configured to enable the image display unit 10 to move along the main light direction L thereof.

[0098] By moving the image display unit 10 in the main light direction L, the virtual image distance of the virtual image 4 can be adjusted. Fig.16As shown in , when the image display unit 10 moves closer to the windshield 2 along the main light direction L, the virtual image distance becomes shorter, and when the image display unit 10 moves away from the windshield 2 along the main light direction L, the virtual image distance becomes longer. By setting the reflection unit 20, the image display unit 10 can also be arranged farther away from the windshield 2 in the vertical direction, thereby allowing the image display unit 10 to move in its main light direction L without interfering with the windshield 2.

[0099] For example, Fig. 20 As shown in the figure, when the image display unit 10 is at position B1, the virtual image distance of the corresponding virtual image 4a is 1120 mm; when the graphic display unit 10 moves 20 mm along the main light direction L from position B1 close to the windshield 2 and reaches position B2, the virtual image distance of the corresponding virtual image 4b ​​is 1096 mm; and when the image display unit 10 moves 20 mm along the main light direction L from position B1 away from the windshield 2 and reaches position B3, the virtual image distance of the corresponding virtual image 4c is 1142 mm.

[0100] It is conceivable that the position of the image display unit 10 in the main light direction L can be adjusted according to the required virtual image distance. For example, when the image display unit 10 is at position B1, when the required virtual image distance is 1096 mm, the image display unit 10 can be moved 20 mm along the main light direction L from position B1 close to the windshield 2 and adjusted to position B2.

[0101] Below, refer to Fig.21 , an exemplary structure of the mobile device 40 is provided.

[0102] The moving device 40 may include a guide rail 401 and a slider 402 configured to slide on the guide rail 401. The image display unit 10 is fixed to the slider 402, whereby the image display unit 10 can move along the main light direction L as the slider 402 slides on the guide rail 401. In some embodiments, the guide rail 401 may be fixed to the dashboard, however, it is conceivable that the guide rail 401 may also be fixed to other vehicle parts.

[0103] like Fig.21 As shown in , the guide rail 401 can be a pair of guide rails, and the slider 402 can be two sliders respectively arranged on the pair of guide rails, and the image display unit 10 is connected between the two sliders. However, the guide rail and the slider can also be one, three or more, which is not limited here.

[0104] In the present disclosure, the terms "first", "second", etc. are used only for the purpose of convenience of description and should not be regarded as limiting. In addition, although the present disclosure has been described with reference to exemplary embodiments, it should be understood that the present disclosure is not limited to the specific embodiments described and shown in detail herein. Those skilled in the art may make various changes to the exemplary embodiments without departing from the scope defined by the claims of the present disclosure.

[0105] The features mentioned and / or shown in the above description of the exemplary embodiments of the present disclosure may be combined in the same or similar manner into one or more other embodiments, combined with the features in other embodiments or substituted for the corresponding features in other embodiments. The technical solutions obtained by these combinations or substitutions shall also be deemed to be included in the protection scope of the present disclosure.

Claims

1. A reflective unit for a panoramic head-up display, characterized in that: include: a reflecting portion configured to be arranged on a side of a lower region of a windshield of a vehicle inside the vehicle to reflect image light emitted from an image display unit for a panoramic head-up display; and The fixing portion is configured to fix the reflecting portion to form a non-zero angle relative to the windshield.

2. The reflective unit for panoramic head-up display according to claim 1, characterized in that: The fixing portion is configured to be arranged on a first side of the reflecting portion close to the windshield when the reflecting portion is fixed, so as to fix the reflecting portion to the windshield, or the fixing portion is configured to be arranged on a second side of the reflecting portion away from the windshield when the reflecting portion is fixed and fixedly connected to a dashboard of the vehicle, so as to fix the reflecting portion between the windshield and the fixing portion.

3. The reflective unit for panoramic head-up display according to claim 1, characterized in that: The fixing portion is configured to be able to adjust the angle.

4. The reflective unit for panoramic head-up display according to claim 3, characterized in that: The fixing portion includes a first bracket, a second bracket, and a rotating portion connected to the first bracket and the second bracket, the first bracket being configured to be fixed to a dashboard of the vehicle, the second bracket being configured to fix the reflecting portion, and the rotating portion being configured so that the second bracket can rotate around the rotating portion to adjust the angle.

5. The reflective unit for panoramic head-up display according to claim 1, characterized in that: The reflecting portion is provided with a reflecting film on a side away from the windshield when it is fixed, and the reflecting film is a P light reflecting film for reflecting only P light, an S light reflecting film for reflecting only S light, or a P light S light reflecting film for reflecting both P light and S light.

6. The reflective unit for panoramic head-up display according to claim 1, characterized in that: The reflecting portion is provided with a light absorbing film on a side close to the windshield when the reflecting portion is fixed.

7. The reflective unit for panoramic head-up display according to claim 1, characterized in that: The reflecting part is a one-piece lens, or a spliced ​​lens formed by splicing a plurality of lenses, or a plurality of lenses arranged at intervals in the transverse direction of the windshield.

8. A panoramic head-up display system, characterized in that: include: An image display unit configured to emit image light; as well as A reflective unit for a panoramic head-up display according to any one of claims 1 to 7.

9. The panoramic head-up display system according to claim 8, characterized in that: The reflecting portion is provided with a reflecting film on a side away from the windshield when the reflecting portion is fixed, wherein the image display unit is configured to emit the image light as P light, and the reflecting film is a P-light reflecting film for reflecting only the P light; or, the image display unit is configured to emit the image light as S light, and the reflecting film is an S-light reflecting film for reflecting only the S light; or, the image display unit is configured to emit the image light as natural light, and the reflecting film is a P-light-S-light reflecting film for reflecting both P light and S light; or, the image display unit is configured to emit the image light as S light, and the reflecting film is the P-light reflecting film or the P-light-S-light reflecting film, and the panoramic head-up display system also includes a polarization conversion device, which is arranged on the light emitting side of the image display unit, so as to convert the image light to be incident on the reflecting portion into P light.

10. The panoramic head-up display system according to claim 8, characterized in that: The image display unit is a one-piece display screen, or a spliced ​​display screen formed by splicing a plurality of display screens, or a plurality of display screens arranged at intervals in the transverse direction of the windshield.

11. The panoramic head-up display system according to claim 8, characterized in that: Also included is a moving device configured to enable the image display unit to move along the direction of its main light.

Images