Optical reflective film and in-vehicle display device

Abstract

The utility model discloses an optical reflecting film and a vehicle-mounted display device. The optical reflecting film comprises a plurality of reflecting modules; each reflection module comprises a plurality of reflection units, each reflection unit is used for reflecting the image light to the position of the focus corresponding to each reflection unit, and the focuses of the plurality of reflection units uniformly cover the first emergent area and the second emergent area; therefore, the image light reflected by the plurality of reflection units uniformly covers the first display area and the second display area. The optical reflecting film reflects the image light to the focus position corresponding to each reflecting unit through the plurality of reflecting units in each reflecting module, and the focuses of each reflecting unit are uniformly distributed in the first display area and the second display area, so that the image light is prevented from being projected out of the display areas; the light beam energy utilization rate of the optical reflection film is improved, the display uniformity of the image light in the display area is improved, and then the user experience is improved.

Description

Technical Field

[0001] The present application relates to the field of optical technology, and in particular to an optical reflective film and a vehicle-mounted display device. Background Art

[0002] Optical reflective films are usually used in single-window scenarios, that is, they are used to reflect the light beam emitted by the light source into the single-window area for display. In related technologies, a diffusion film with a large diffusion angle is usually used to expand the area of ​​the window covered by the light spot of the light beam reflected by the optical reflective film, so that it can be applied to the design of double windows. However, the traditional way of expanding the window will cause a large amount of light beams reflected by the optical reflective film to be projected outside the window range. The optical reflective film has a low energy utilization rate for the light beam, and it is impossible to efficiently distribute the light beam reflected by the optical reflective film, resulting in uneven distribution of the light beam reflected into the window area, affecting the user experience. Utility Model Content

[0003] In a first aspect, the present application proposes an optical reflective film, comprising: a plurality of reflective modules; each of the reflective modules comprises a plurality of reflective units, each of the reflective units has a focus, each of the reflective units is used to reflect image light to the position of the focus corresponding to each of the reflective units, and the focal points of the plurality of reflective units uniformly cover a first exit area and a second exit area, so that the image light reflected by the plurality of reflective units uniformly covers a first display area and a second display area; wherein the first exit area matches the shape of the first display area, and the first exit area at least partially overlaps with the first display area, and the second exit area matches the shape of the second display area, and the second exit area at least partially overlaps with the second display area.

[0004] Optionally, a ratio of the aspect ratio of the first emission area to the aspect ratio of the first display area is a, a ratio of the aspect ratio of the second emission area to the aspect ratio of the second display area is a, and a range of a is within (0.8, 1.2), and a is:

[0005]

[0006] Among them, L1 is the area length of the target emission area, W1 is the area width of the target emission area, L2 is the area length of the target display area, W2 is the area width of the target display area, when the target emission area is the first emission area, the target display area is the first display area, and when the target emission area is the second emission area, the target display area is the second display area.

[0007] Optionally, a ratio of a region length of the first emission region to a region length of the first display region is b, a ratio of a region length of the second emission region to a region length of the second display region is b, and a value range of b is within (0.8, 1.2), wherein b is:

[0008]

[0009] Optionally, the multiple reflection units include a plurality of first reflection units and a plurality of second reflection units distributed in an array, the focal points of the plurality of first reflection units uniformly cover the first exit area, and the focal points of the plurality of second reflection units uniformly cover the second exit area; the arrangement manner of the plurality of first reflection units and the plurality of second reflection units includes at least one of an independent arrangement manner, a row-spaced arrangement manner, and a two-by-two cross arrangement manner.

[0010] Optionally, the optical reflective film also includes a diffusion layer, which is arranged on the surface of the multiple reflective modules; the diffusion layer is used to perform homogenization processing on the image light reflected and output by the multiple reflective modules, and output the image light after the homogenization processing, so that the spot shape of the image light after the homogenization processing projected to the target display area matches the shape of the target display area, and the target display area is the first display area or the second display area.

[0011] Optionally, the material of the diffusion layer is at least one of a volume diffusion material and a surface diffusion material.

[0012] Optionally, the optical reflective film further includes a base layer, wherein the base layer is disposed between the plurality of reflective modules and the diffusion layer, and the base layer is used for transmitting the image light.

[0013] Optionally, a side of the plurality of reflective modules away from the base layer is plated with a reflective material to form a reflective layer for reflecting the image light.

[0014] Optionally, the optical reflective film further includes a protective layer made of a light-absorbing material, and the protective layer is laminated to the reflective layer.

[0015] In the second aspect, the present application proposes a vehicle-mounted display device, comprising: a light source and the above-mentioned optical reflective film; the light source is used to emit image light; the optical reflective film is arranged in the light beam output direction of the light source, and the optical reflective film is used to reflect the image light so as to reflect the image light to a first display area and a second display area respectively, the first display area being the window area of ​​the main driver's seat of the vehicle, and the second display area being the window area of ​​the co-driver's seat of the vehicle.

[0016] The optical reflective film provided in the present application includes: a plurality of reflective modules; each reflective module includes a plurality of reflective units, each reflective unit has a focus, each reflective unit is used to reflect image light to the position of the focus corresponding to each reflective unit, and the focus of the plurality of reflective units uniformly covers the first exit area and the second exit area, so that the image light reflected by the plurality of reflective units uniformly covers the first display area and the second display area; wherein the first exit area matches the shape of the first display area, and the first exit area at least partially overlaps with the first display area, and the second exit area matches the shape of the second display area, and the second exit area at least partially overlaps with the second display area. In the present embodiment, the optical reflective film distributes the image light to the focal position corresponding to each reflective unit when reflecting the received image light through the multiple reflective units in each reflective module, and sets the focal point of each reflective unit to be evenly distributed in the first exit area and the second exit area. Based on the fact that each exit area at least partially overlaps with the corresponding display area, the image light reflected by the reflective module can be evenly distributed in the first display area and the second display area, thereby avoiding the image light from being projected outside the display area, improving the energy utilization rate of the optical reflective film for the light beam, and the setting of the optical reflective film improves the display uniformity of the image light in the first display area and the second display area, thereby improving the user experience.

[0017] These and other aspects of the present application will become more clearly understood in the description of the following embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic structural diagram of an optical reflective film provided in one embodiment of the present application is shown.

[0020] Figure 2 Shows this application Figure 1 A schematic diagram of the structure of the reflection module is provided.

[0021] Figure 3 Shows this application Figure 1 A schematic diagram of the optical path of image light reflected by an optical reflective film is provided.

[0022] Figure 4 A schematic diagram showing the focus distribution of multiple reflective units in a target emission area and a target display area provided by an embodiment of the present application is shown.

[0023] Figure 5 A schematic structural diagram of an optical reflective film provided in another embodiment of the present application is shown.

[0024] Figure 6 A schematic diagram showing an independent arrangement of multiple reflective units provided in an embodiment of the present application is shown.

[0025] Figure 7 A schematic diagram showing a plurality of reflective units arranged in rows at intervals according to an embodiment of the present application is shown.

[0026] Figure 8 A schematic diagram showing a plurality of reflective units provided by an embodiment of the present application arranged crosswise in pairs is shown.

[0027] Fig. 9 A schematic structural diagram of a vehicle-mounted display device provided in one embodiment of the present application is shown. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0029] The terms "first", "second", etc. in this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0030] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0031] In the vehicle's head-up display (HUD), the head-up display system usually reflects important information such as vehicle speed, navigation and other information to the observation window in front of the driver through an optical reflective film, so that the driver can see important driving information such as vehicle speed and navigation without lowering his head or turning his head, thereby improving the driver's driving safety. However, since the main driver will not concentrate on checking the driving information of the corresponding vehicle when driving for a long time or being distracted, it is easy to cause a safety accident. In order to ensure driving safety, in the related technology, an additional projection light machine and an optical reflective film are usually set in front of the co-pilot to project the driving information onto the observation window in front of the co-pilot, resulting in a high preparation cost of the device, or by expanding the window so that the light beam emitted by a light source can be reflected to the main driver and the co-pilot's observation windows at the same time, but at this time, part of the light beam will be projected to the area between the main driver's observation window and the co-pilot's observation window, resulting in a low energy utilization rate of the optical reflective film for the light beam.

[0032] Please refer to Figure 1 , Figure 1 The structure diagram of the optical reflective film 1 provided in one embodiment of the present application is shown. Figure 1 The optical reflective film 1 provided in the embodiment of the present application is described in detail. Figure 1 As shown, the optical reflective film 1 of the present application includes a plurality of reflective modules 10 .

[0033] In this embodiment, each reflection module 10 in the optical reflection film 1 includes a plurality of reflection units, and the plurality of reflection units in each reflection module 10 are used to reflect the received image light to the first display area and the second display area.

[0034] like Figure 2 As shown, Figure 2 Shows this application Figure 1 A schematic diagram of the structure of the reflection module 10 is provided. In the present embodiment, each reflection module 10 includes a plurality of reflection units 11, and the reflection performance of each reflection module 10 can be individually controlled by optical design, that is, the plurality of reflection units 11 in each reflection module 10 can have different reflection directions, thus breaking the limitation of the rotational symmetry of the optical reflection film, so that the optical reflection film can have more design freedom.

[0035] Optionally, a plurality of reflective units 11 with different reflective directions can reflect the image light to the first display area and the second display area. For example, when any one of the plurality of reflective units 11 has a first reflective direction, the reflective unit 11 can reflect the image light to the first display area, and when any one of the plurality of reflective units 11 has a second reflective direction, the reflective unit 11 can reflect the image light to the second display area. The shape of each reflective unit 11 can be at least one of a triangle, a square, a rectangle and a hexagon, which is not limited here.

[0036] Optionally, each reflection unit in the reflection module 10 has a focus, and each reflection unit is used to reflect the image light to the position of the focus corresponding to each reflection unit, that is, each reflection unit will reflect and converge the image light projected onto its reflection surface, and the image light reflected by each reflection unit will converge on the focus corresponding to each reflection unit. In addition, the focus of multiple reflection units in a reflection module 10 can evenly cover the first exit area and the second exit area, so that the image light reflected by the multiple reflection units evenly covers the first display area and the second display area. The first exit area matches the shape of the first display area, and the first exit area at least partially overlaps the first display area, and the second exit area matches the shape of the second display area, and the second exit area at least partially overlaps the second display area.

[0037] In this embodiment, when the multiple reflection units in each reflection module 10 reflect the received image light to the first display area and the second display area, each reflection unit can reflect the image light to the position of its corresponding focus. The focus of the multiple reflection units evenly covers the first exit area and the second exit area, that is, by designing the reflection surfaces of the multiple reflection units in a reflection module 10, the image light reflected by the multiple reflection units can be converged in the first display area and the second display area, and evenly cover the first display area and the second display area, and the shapes of the first exit area, the second exit area, the first display area and the first display area are all rectangular, which can be rectangles of the same or similar shapes, and are not limited here.

[0038] See also Figure 3 , Figure 3 Shows this application Figure 1 The optical path diagram of the image light reflected by the optical reflective film provided. Figure 3As shown, when the optical reflective film reflects the received image light to the first display area 21 and the second display area 22 for display through the multiple reflective units in each reflective module 10, the image light can be distributed to the focal position corresponding to each reflective unit. When the first emission area 31 at least partially overlaps with the first display area 21, and the second emission area 32 at least partially overlaps with the second display area 22, the image light reflected by each reflective module 10 is evenly distributed in the first display area 21 and the second display area 22, thereby ensuring that the beam energy of the image light is efficiently utilized and improving the display uniformity of the image light in the first display area 21 and the second display area 22.

[0039] In some embodiments, the optical reflective film 1 can be applied to the head-up display system of the vehicle, in which case the first display area is the window area of ​​the main driver's seat of the vehicle, and the second display area is the window area of ​​the co-driver's seat of the vehicle, that is, the head-up display system provided with the optical reflective film 1 can not only project the vehicle's driving information onto the observation window in front of the driver, but also provide the vehicle's driving information to the observation window in front of the co-driver's seat. Since the main driver will not concentrate on checking the corresponding vehicle's driving information when driving for a long time or being distracted, it is easy to cause a safety accident. When the optical reflective film 1 provided in this embodiment is provided in the head-up display system of the vehicle, the passenger of the co-driver's seat can see the vehicle's driving information without lowering his head, and the passenger of the co-driver's seat can easily remind the driver of the vehicle's current driving information to ensure driving safety. Furthermore, by providing the optical reflective film 1, when only one light source is used, the reflective performance of each reflective module 10 in the optical reflective film 1 is individually designed, so that after the optical reflective film 1 reflects the image light, only the driver's window area and the co-driver's window area can receive the vehicle's driving information, thereby avoiding the image light from being projected to areas outside the two observation windows, thereby improving the energy utilization rate of the optical reflective film 1 for the light beam and reducing the preparation cost of the head-up display system.

[0040] In the present embodiment, the optical reflective film 1 comprises: a plurality of reflective modules 10; each reflective module 10 comprises a plurality of reflective units, each reflective unit has a focus, each reflective unit is used to reflect image light to the position of the focus corresponding to each reflective unit, and the focus of the plurality of reflective units uniformly covers the first exit area and the second exit area, so that the image light reflected by the plurality of reflective units uniformly covers the first display area and the second display area; wherein the first exit area matches the shape of the first display area, and the first exit area at least partially overlaps with the first display area, and the second exit area matches the shape of the second display area, and the second exit area at least partially overlaps with the second display area. In the present embodiment, the optical reflective film 1 distributes the image light to the focal position corresponding to each reflective unit when reflecting the received image light through the multiple reflective units in each reflective module 10, and sets the focal point of each reflective unit to be evenly distributed in the first exit area and the second exit area. Based on the fact that each exit area at least partially overlaps with the corresponding display area, the image light reflected by the reflective module 10 can be evenly distributed in the first display area and the second display area, thereby avoiding the image light from being projected outside the display area, improving the energy utilization rate of the optical reflective film 1 for the light beam, and the setting of the optical reflective film 1 improves the display uniformity of the image light in the first display area and the second display area, thereby improving the user experience.

[0041] See also Figure 4 , Figure 4 A schematic diagram showing the focus distribution of multiple reflective units 11 in a target emission area 30 and a target display area 20 provided in an embodiment of the present application is shown.

[0042] In this embodiment, the image light reflected by each reflection unit 11 will converge at the position of the focus corresponding to each reflection unit 11 in the target emission area 30, and the target emission area 30 at least partially overlaps with the target display area 20. Wherein, when the target emission area 30 is the first emission area, the target display area 20 is the first display area, and when the target emission area 30 is the second emission area, the target display area 20 is the second display area.

[0043] In this embodiment, the ratio of the aspect ratio of the first emission area to the aspect ratio of the first display area is a, and the ratio of the aspect ratio of the second emission area to the aspect ratio of the second display area is a, and the value range of a is within (0.8, 1.2), and a is:

[0044]

[0045] Wherein, L1 is the area length of the target emission area 30 , W1 is the area width of the target emission area 30 , L2 is the area length of the target display area 20 , and W2 is the area width of the target display area 20 .

[0046] Furthermore, the ratio of the area length of the first emission area to the area length of the first display area is b, the ratio of the area length of the second emission area to the area length of the second display area is b, and the value range of b is within (0.8, 1.2), so the first emission area and the first display area are rectangles with the same or similar shapes, and the second emission area and the second display area are rectangles with the same or similar shapes. Wherein, b is:

[0047]

[0048] Optionally, when the shapes of the first emission area and the first display area match, the ratio of the length-to-width ratio of the first emission area to the length-to-width ratio of the first display area is a, and the ratio of the area length of the first emission area to the area length of the first display area is b. Since the value ranges of a and b are both within (0.8, 1.2), the first emission area and the first display area are rectangles with the same or similar shapes, and the first emission area and the first display area at least partially overlap. Among them, when the values ​​of a and b are closer to 1, the shapes and sizes of the first emission area and the first display area are closer. At this time, the first emission area and the first display area are almost overlapped, and the focal points of the multiple reflection units 11 are evenly distributed in the first display area and can almost cover the first display area. At this time, the image light reflected by the multiple reflection units 11 can reflect the image light to different positions of the first display area, thereby evenly covering the first display area.

[0049] Optionally, when the shapes of the second emission area and the second display area match, the ratio of the length-to-width ratio of the second emission area to the length-to-width ratio of the second display area is a, and the ratio of the area length of the second emission area to the area length of the second display area is b. Since the value ranges of a and b are both within (0.8, 1.2), the second emission area and the second display area are rectangles with the same or similar shapes, and the second emission area and the second display area at least partially overlap. Among them, when the values ​​of a and b are closer to 1, the shapes and sizes of the second emission area and the second display area are closer. At this time, the second emission area and the second display area are almost overlapped, and the focal points of the multiple reflection units 11 are evenly distributed in the second display area and can almost cover the second display area. At this time, the image light reflected by the multiple reflection units 11 can reflect the image light to different positions of the second display area, thereby evenly covering the second display area.

[0050] In this embodiment, when the multiple reflection units 11 in each reflection module reflect the received image light to the first display area and the second display area for display, the image light can be distributed to the focal position corresponding to each reflection unit 11. In the case where the first emission area at least partially overlaps with the first display area, and the second emission area at least partially overlaps with the second display area, the image light reflected by each reflection module is evenly distributed in the first display area and the second display area, thereby ensuring that the beam energy of the image light is efficiently utilized and improving the display uniformity of the image light in the first display area and the second display area.

[0051] Please refer to Figure 5 , Figure 5 The structure diagram of the optical reflective film 1 provided by another embodiment of the present application is shown below. Figure 5 The optical reflective film 1 provided in the embodiment of the present application is described in detail. Figure 5 As shown, the optical reflective film 1 of the present application includes a plurality of reflective modules 10 .

[0052] Optionally, each reflective module 10 in the optical reflective film 1 includes a plurality of reflective units distributed in an array, and each reflective unit has a focus, each reflective unit is used to reflect image light to the position of the focus corresponding to each reflective unit, and the focal points of the plurality of reflective units uniformly cover the first exit area and the second exit area, so that the image light reflected by the plurality of reflective units uniformly covers the first display area and the second display area.

[0053] In this embodiment, the multiple reflection units in a reflection module 10 include multiple first reflection units and multiple second reflection units distributed in an array, and the focus of the multiple first reflection units evenly covers the first emission area, and the focus of the multiple second reflection units evenly covers the second emission area. The arrangement of the multiple first reflection units and the multiple second reflection units includes at least one of an independent arrangement, a row-spaced arrangement, and a two-by-two cross arrangement, which is not limited here.

[0054] like Figure 6 As shown, Figure 6 A schematic diagram of an independent arrangement of multiple reflective units provided in an embodiment of the present application is shown. In this embodiment, in each reflective module 10, multiple first reflective units 12 among the multiple reflective units are arranged in an array to form a first array arrangement area 121, and multiple second reflective units 13 among the multiple reflective units are arranged in an array to form a second array arrangement area 131, and the first array arrangement area 121 is adjacent to the second array arrangement area 131.

[0055] like Figure 7 As shown, Figure 7A schematic diagram of a plurality of reflective unit rows arranged at intervals according to an embodiment of the present application is shown. In this embodiment, in each reflective module 10, a plurality of first reflective units 12 of the plurality of reflective units are arranged in columns to form a plurality of first array rows 122, a plurality of second reflective units 13 of the plurality of reflective units are arranged in columns to form a plurality of second array rows 132, and the first array rows 122 and the second array rows 132 are arranged at intervals, that is, a second array row 132 is arranged between every two first array rows 122.

[0056] like Figure 8 As shown, Figure 8 A schematic diagram of a plurality of reflective units provided by an embodiment of the present application is shown in which a plurality of reflective units are arranged crosswise in pairs. In this embodiment, in each reflective module 10, a plurality of first reflective units 12 and a plurality of second reflective units 13 in the plurality of reflective units are arranged crosswise in pairs.

[0057] In this embodiment, the array arrangement of the plurality of first reflecting units and the plurality of second reflecting units in each reflecting module 10 can be various, but in any array arrangement, by designing the reflecting surfaces of the plurality of first reflecting units and the plurality of second reflecting units, the focal points of the plurality of first reflecting units can uniformly cover the first exit area, and the focal points of the plurality of second reflecting units can uniformly cover the second exit area. In addition, since the first exit area at least partially overlaps with the first display area, and the second exit area at least partially overlaps with the second display area, it is ensured that the image light reflected by each reflecting module 10 can uniformly cover the first display area and the second display area, thereby improving the display uniformity of the image light in the first display area and the second display area.

[0058] Optionally, the optical reflective film 1 further includes a diffusion layer 40, which is disposed on the surfaces of the plurality of reflective modules 10, and the diffusion layer 40 is made of at least one of a volume diffusion material and a surface diffusion material. The diffusion layer 40 is used to perform a homogenization process on the image light reflected and output by the plurality of reflective modules 10, and output the homogenized image light, so that the spot shape of the homogenized image light projected to the target display area matches the shape of the target display area, and the target display area is the first display area or the second display area.

[0059] It should be noted that if the focus separation design is not performed for the multiple reflective units in each reflective module 10, and the multiple reflective units have a single focus or the reflective surface is a plane, after the multiple reflective units reflect the image light, the image light can only cover part of the first display area and the second display area. At this time, a diffusion layer 40 with a larger diffusion angle needs to be provided to diffuse the image light so that the image light can cover the first display area and the second display area. However, after the diffusion treatment by the diffusion layer 40, the light spot of the image light in the first display area and the second display area presents a circular Gaussian or elliptical Gaussian energy distribution, that is, the image light presents a beam energy distribution with a brighter middle and darker surroundings, and the light spot uniformity is poor. Moreover, the light spot of the image light after diffusion presents a circular or elliptical shape, which does not match the shape of the first display area and the second display area, resulting in a low utilization rate of the beam energy.

[0060] In this embodiment, since the focal points of the multiple reflective units in each reflective module 10 in the optical reflective film 1 uniformly cover the first exit area and the second exit area, the image light reflected by the multiple reflective units is distributed to the focal position of each reflective unit in the first exit area or the second exit area, and the first exit area at least partially overlaps with the first display area, and the second exit area at least partially overlaps with the second display area, so that the image light can uniformly cover the first display area and the second display area before being homogenized by the diffusion layer 40. Based on this, when a diffusion layer 40 with a smaller diffusion angle is provided in the optical reflective film 1, the diffusion layer 40 can make the image light uniformly distributed in the first display area and the second display area after homogenizing the image light reflected and converged by the multiple reflective modules 10, and the light spot of the image light matches the shape of the first display area and the second display area, so that while ensuring that the beam energy of the image light is efficiently utilized, the display uniformity of the image light in the first display area and the second display area can be improved.

[0061] Furthermore, the optical reflective film 1 of the present embodiment further includes a base layer 50, which is disposed between the plurality of reflective modules 10 and the diffusion layer 40, and is used to transmit image light. The base layer 50 is made of a highly light-transmitting material, including but not limited to polyethylene terephthalate, polyvinyl chloride, polycarbonate, acrylic or glass.

[0062] Optionally, the multiple reflective modules 10 can be made of highly light-transmitting resin, including but not limited to polyacrylic acid, epoxy or silicone, etc., through a molding process, and the multiple reflective modules 10 are arranged on the surface of the base layer 50. The side of the multiple reflective modules 10 away from the base layer 50 is plated with a reflective material to form a reflective layer 60 for reflecting image light. The reflective layer 60 can be a metal reflective layer formed of a metal reflective material, including but not limited to aluminum or silver, and the reflective layer 60 can also be a multi-layer cut-off reflective layer, which is not limited here.

[0063] Furthermore, the optical reflective film 1 also includes a protective layer 70 made of a light-absorbing material, and the protective layer 70 is laminated on the reflective layer 60, that is, the side of the multiple reflective modules 10 away from the base layer 50 is also coated with a light-absorbing material, and the light-absorbing material includes at least one of carbon black, iron oxide, aniline black, lamp black, and iron black to form a protective layer 70 for protecting the reflective layer 60 and preventing the reflective layer 60 from being scratched.

[0064] In the present embodiment, the optical reflective film 1 distributes the image light to the focal position corresponding to each reflective unit when reflecting the received image light through the multiple reflective units in each reflective module 10, and sets the focal point of each reflective unit to be evenly distributed in the first display area and the second display area, so that when the diffusion layer 40 with a smaller diffusion angle is set, the diffusion layer 40 performs light homogenization on the image light reflected and converged by the multiple reflective modules 10, so that the image light can be evenly distributed in the first display area and the second display area, and the light spot of the image light matches the shape of the first display area and the second display area, so that while ensuring that the beam energy of the image light is efficiently utilized, the display uniformity of the image light in the first display area and the second display area can be improved, thereby improving the user experience.

[0065] Please refer to Fig. 9 , Fig. 9 The structure diagram of the vehicle display device 2 provided by an embodiment of the present application is shown below. Fig. 9 The vehicle-mounted display device 2 provided in the embodiment of the present application is described in detail. Fig. 9 As shown, the vehicle-mounted display device 2 of the present application includes a light source 3 and the optical reflective film 1 described in the above embodiment.

[0066] In this embodiment, the light source 3 is used to emit image light, and the light source 3 includes but is not limited to a projection light machine. The optical reflective film 1 is arranged in the light beam output direction of the light source 3, and the optical reflective film 1 is used to reflect the image light emitted by the light source 3, so as to reflect the image light to the first display area 21 and the second display area 22 respectively.

[0067] Optionally, the vehicle-mounted display device 2 can be applied to the head-up display system of the vehicle. In this case, the light source 3 and the optical reflective film 1 in the vehicle-mounted display device 2 are both arranged on the dashboard of the vehicle. In this case, the first display area 21 is the main driver's window area of ​​the vehicle, and the second display area 22 is the main driver's window area of ​​the vehicle.

[0068] In this embodiment, when the image light emitted by the light source 3 is reflected by the optical reflective film 1, the optical reflective film 1 reflects and outputs the image light to the reflective structure corresponding to the main driver's window area and the reflective structure corresponding to the co-driver's window area on the front windshield of the vehicle, so that the image light is reflected to the main driver's window area and the co-driver's window area respectively. Based on this, when only one light source 3 is used, through the reflection of the image light by the optical reflective film 1, the main driver and the co-driver can receive the vehicle's driving information without lowering their heads or turning their heads, thereby improving the driving safety of the vehicle during driving.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An optical reflective film, characterized in that: The optical reflective film includes a plurality of reflective modules; Each of the reflection modules includes a plurality of reflection units, each of the reflection units has a focus, and each of the reflection units is used to reflect the image light to a position where the focus corresponding to each of the reflection units is located, and the focuses of the plurality of reflection units uniformly cover the first exit area and the second exit area, so that the image light reflected by the plurality of reflection units uniformly covers the first display area and the second display area; The first emission area matches the shape of the first display area, and the first emission area at least partially overlaps with the first display area; the second emission area matches the shape of the second display area, and the second emission area at least partially overlaps with the second display area.

2. The optical reflective film according to claim 1, characterized in that: The ratio of the aspect ratio of the first emission area to the aspect ratio of the first display area is a, and the ratio of the aspect ratio of the second emission area to the aspect ratio of the second display area is a, and the value range of a is within (0.8, 1.2), and a is: Among them, L1 is the area length of the target emission area, W1 is the area width of the target emission area, L2 is the area length of the target display area, W2 is the area width of the target display area, when the target emission area is the first emission area, the target display area is the first display area, and when the target emission area is the second emission area, the target display area is the second display area.

3. The optical reflective film according to claim 2, characterized in that: The ratio of the area length of the first emission area to the area length of the first display area is b, and the ratio of the area length of the second emission area to the area length of the second display area is b, and the value range of b is within (0.8, 1.2), where b is:

4. The optical reflective film according to claim 1, characterized in that: The plurality of reflection units include a plurality of first reflection units and a plurality of second reflection units distributed in an array, the focal points of the plurality of first reflection units uniformly cover the first emission area, and the focal points of the plurality of second reflection units uniformly cover the second emission area; The arrangement of the plurality of first reflective units and the plurality of second reflective units includes at least one of an independent arrangement, a row-spaced arrangement, and a two-by-two cross arrangement.

5. The optical reflective film according to any one of claims 1 to 4, characterized in that: The optical reflective film further comprises a diffusion layer, and the diffusion layer is disposed on the surfaces of the plurality of reflective modules; The diffusion layer is used to perform homogenization processing on the image light reflected and output by the multiple reflection modules, and output the image light after the homogenization processing, so that the spot shape of the image light after the homogenization processing projected to the target display area matches the shape of the target display area, and the target display area is the first display area or the second display area.

6. The optical reflective film according to claim 5, characterized in that: The material of the diffusion layer is at least one of a volume diffusion material and a surface diffusion material.

7. The optical reflective film according to claim 6, characterized in that: The optical reflective film further includes a base layer, which is disposed between the plurality of reflective modules and the diffusion layer, and is used for transmitting the image light.

8. The optical reflective film according to claim 7, characterized in that: A side of the plurality of reflective modules away from the base layer is plated with a reflective material to form a reflective layer for reflecting the image light.

9. The optical reflective film according to claim 8, characterized in that: The optical reflective film further comprises a protective layer made of a light-absorbing material, and the protective layer is laminated to the reflective layer.

10. A vehicle-mounted display device, characterized in that: comprising a light source and the optical reflective film according to any one of claims 1 to 9; The light source is used to emit image light; The optical reflective film is arranged in the light beam output direction of the light source, and is used to reflect the image light so as to reflect the image light to a first display area and a second display area respectively. The first display area is a window area for the main driver's seat of the vehicle, and the second display area is a window area for the co-driver's seat of the vehicle.

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