Curved mirror, projection apparatus, display device, seat and terminal

Abstract

A curved mirror (2), a projection apparatus, a display device (10), a seat and a terminal. The curved mirror (2) comprises a mirror body (21), a first connecting portion (22) and a second connecting portion (23), the first connecting portion (22) and the second connecting portion (23) being configured to fix the curved mirror (2). The mirror body (21) comprises a first surface (211), a second surface (212), a first edge (213) and a second edge (214). The first surface (211) is a curved surface, the normal direction of the first surface (211) is a first direction, the first surface (211) and the second surface (212) are arranged opposite each other in the first direction, and the first edge (213) and the second edge (214) are arranged opposite each other in a second direction, the first direction being different from the second direction. The first connection portion (22) protrudes from the first edge (213), and the second connection portion (23) protrudes from the second edge (214).

Description

Curved mirror, projection device, display equipment, seat and terminal

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on November 15, 2023, with application number 202311524961.8 and application name “A curved mirror, projection device, display device, seat and terminal”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of vehicle-mounted equipment, and in particular to a curved mirror, a projection device, a display device, a seat, and a terminal. Background Art

[0003] Optical display devices utilize optical imaging principles to create a large-screen visual experience within a small space. These devices are widely used in projectors, head-up displays (HUDs), in-vehicle displays, and headlights. Curved mirrors are often used in optical display devices to reflect light beams and create converging or diverging effects. With the widespread adoption of optical display devices, the mounting structure of these curved mirrors has also attracted attention.

[0004] Currently, curved mirrors are mostly installed using an adhesive solution. The curved mirror is bonded to the bottom shell using glue or double-backed adhesive foam, and then secured by a frame around the edges. On the one hand, the curved mirror is usually made of a different material than the bottom shell, which can easily lead to different deformations due to different thermal expansion coefficients when heated. This can affect the bond strength between the curved mirror and the frame, reducing the stability of the curved mirror installation. On the other hand, because the adhesive layer is usually made of a flexible material, when the optical display device is installed on a mobile terminal, the adhesive installation method may cause the curved mirror to shake due to bumps and vibrations of the mobile terminal, causing the image to jump accordingly, affecting the user experience.

[0005] How to improve the installation stability of curved mirrors and enhance the user experience of using optical display devices is a hot issue that technicians in this field are currently studying.

[0006] Summary of the Invention

[0007] The present application provides a curved mirror, a projection device, a display device, a seat and a terminal, which can improve the assembly stability and assembly accuracy of the curved mirror, reduce the possibility of irregular deformation of the curved mirror, and enhance the user experience.

[0008] In a first aspect, the present application provides a curved mirror, comprising a mirror body, a first connecting portion and a second connecting portion, wherein the first connecting portion and the second connecting portion are used to fix the curved mirror.

[0009] The mirror body includes a first surface, a second surface, a first edge, and a second edge. The first surface is a curved surface, and the normal to the first surface is a first direction. The first surface and the second surface are disposed opposite each other along the first direction, and the first edge and the second edge are disposed opposite each other along a second direction, where the first direction is different from the second direction. Optionally, the first direction is perpendicular to the second direction.

[0010] The first connecting portion is protruding from the first edge, and the second connecting portion is protruding from the second edge. The first connecting portion is approximately located in the middle of the first edge, and the second connecting portion is approximately located in the middle of the second edge. Exemplarily, the first connecting portion passes through the midpoint of the first edge, and / or the second connecting portion passes through the midpoint of the second edge.

[0011] Optionally, the first connecting portion is disposed approximately in the middle of the first edge, including: the distance between the central axis of the first connecting portion along the third direction and the central axis of the first edge along the third direction is less than 1 / 5 of the length of the first edge along the third direction. The second connecting portion is disposed approximately in the middle of the second edge, including: the distance between the central axis of the second connecting portion along the third direction and the central axis of the second edge along the third direction is less than 1 / 5 of the length of the second edge along the third direction, and the third direction is different from the first direction and different from the second direction. Optionally, the third direction is perpendicular to the first direction and perpendicular to the second direction.

[0012] In the present application, the curved mirror is fixed by two connecting parts provided at the first edge and the second edge, which can avoid the risk of shaking and falling off caused by the bonding method, improve the assembly stability and assembly precision of the curved mirror, improve the accuracy and stability of the light path formed by the curved mirror, and significantly improve the output quality of the light beam when the curved mirror reflects the light beam. Moreover, the present application uses two connecting parts to fix the curved mirror. The curved mirror can be fixed by connecting and fixing with the connecting parts, which not only reduces the steps of glue injection and pasting in the bonding process, but also has a small number of connecting parts, making it easy to install and reducing the assembly steps of the curved mirror.

[0013] Furthermore, the first and second connecting portions are positioned midway between two opposing edges. Once the curved mirror is secured, the forces acting on each part of the curved surface are more evenly and regularly distributed, maintaining a stable curved surface shape. For example, when forces such as preload, gravity, and stress from thermal expansion act together, the forces acting on each part of the curved surface are more regularly distributed, reducing the likelihood of irregular deformation of the curved mirror, thereby preventing distortion of the light spot passing through the curved mirror and improving the user experience.

[0014] Furthermore, the mirror body also includes other edges, such as a third edge and a fourth edge, while no connection portion is provided on the other edges. It is understandable that when a connection portion is provided on an edge, a corresponding space for accommodating the protruding connection portion needs to be provided on the housing or mounting structure. Therefore, if connections are provided on multiple edges, the occupied space of the housing or mounting structure will be greatly increased, which is not conducive to the development of a high screen-to-body ratio. However, the present application only provides a connection portion on the first and second edges, so that the thickness of the portion of the housing or mounting structure that connects to the other edges is smaller, which is conducive to the development of a high screen-to-body ratio, makes the shape more beautiful, and enhances the user experience.

[0015] In some scenarios, the first connecting portion, the second connecting portion, and the mirror body are integrally connected. In this case, the curved mirror can be a one-piece molded device, further improving stability. Alternatively, the curved mirror can be a one-piece molded product that is integrally cast.

[0016] Considering some possible situations, when the connection part is set at the corner of the edge, the injection molding process of the product is easily affected by the space formed by the connection part at the corner, forming ripples, making the surface of the curved mirror uneven. However, in this application, the connection part is set in the middle of the edge. During the product molding process, the injection molding can flow evenly, which can reduce the possibility of the curved mirror forming ripples. The surface flatness of the product after molding is high, thereby optimizing the optical effect of the surface, avoiding the distortion of the light spot passing through the curved mirror, and improving the user experience.

[0017] Optionally, the second surface is also a curved surface. The curved surface can be one or more of a spherical surface, an aspheric curved surface, or a free-form surface. Aspheric surfaces generally refer to quadratic surfaces such as paraboloids, ellipsoids, involutes, hyperboloids, and higher-order curved surfaces with an axis of rotation, as well as non-rotating aspheric surfaces, such as off-axis aspheric surfaces. A free-form surface is an optical structure with a more complex surface shape. The radius of curvature of each point on its surface is different, and the degree of freedom of the surface shape is very high. Optical free-form surfaces have complex surface structures and high degrees of freedom. There is no clear expression to define them. It is generally believed that optical surfaces that do not have global rotational symmetry, do not have a unified optical axis, and have multiple radii of curvature on the entire surface are optical free-form surfaces.

[0018] For example, the first surface and the second surface may be free-form surfaces, and the curvature radius of each point on the surface may be different. Further, the first surface and the second surface may be different free-form surfaces.

[0019] It should be noted that, in the embodiments of the present application, "back-to-back arrangement" refers to different orientations, and does not necessarily limit the two parts to being in opposite directions in a certain direction. For example, the first surface and the second surface are arranged back to back, which means that the first surface and the second surface are oriented in substantially different directions in the first direction, for example, one is roughly oriented in the positive direction of the X direction and the other is roughly oriented in the negative direction of the X direction. In some possible cases, the first surface and the second surface are parallel and arranged back to back, while in other cases, the first surface and the second surface may not be completely back to back, but may be inclined at a certain angle. Similarly, the first edge and the second edge are back to back, the third edge and the fourth edge are back to back, etc. have similar situations.

[0020] In a possible implementation manner of the first aspect, the connecting portion may fix the curved mirror in the first direction, the second direction, and the third direction.

[0021] For example, on the one hand, the protruding connection portion can be stuck in the third direction and the second direction during installation, thereby preventing the curved mirror from making large displacements in the third direction and the second direction. On the other hand, the edge of the connection portion away from the protrusion can also abut the housing or the mounting structure. On the other hand, the protruding connection portion can be pressed in the normal direction perpendicular to the first surface during installation, thereby preventing displacement in the normal direction of the first surface and preventing the curved mirror from rotating around the second direction. In short, the first connection portion and the second connection portion designed in the present application can improve the stability and assembly accuracy of the curved mirror. In particular, when the curved mirror is set in an environment where bumps and shakes often occur, such as when it is set in a mobile terminal, it can have better anti-shake characteristics, avoiding users from feeling dizzy and other discomforts due to watching the images produced by the curved mirror, thereby improving the user experience.

[0022] In another possible implementation of the first aspect, the central axis of the first connecting portion along the third direction coincides with the central axis of the first edge along the third direction, and the central axis of the second connecting portion along the third direction coincides with the central axis of the second edge along the third direction. This can further enhance the installation stability of the curved mirror, improve the surface stability of the curved surface, make the force applied to each part of the curved surface more regular, and further reduce the possibility of irregular deformation of the curved mirror.

[0023] In another possible implementation of the first aspect, a length of the first connection portion along the third direction is smaller than a length of the first edge along the third direction, and a length of the second connection portion along the third direction is smaller than a length of the second edge along the third direction.

[0024] In the above embodiment, the length of the connecting portion is smaller than the length of the edge on which it is provided. On the one hand, the surface difference of the curved surface spanned by the connecting portion is reduced, so that a smooth transition is made between the curved surface of the mirror body and the surface of the connecting portion along the first direction, which is beneficial to maintaining the installation stability of the curved mirror. On the other hand, when the length of the connecting portion is relatively small, the shell that accommodates the curved surface can correspondingly reduce the space for accommodating the connecting portion, which is beneficial to the miniaturization trend of the display device.

[0025] In another possible implementation of the first aspect, a ratio of a length of the first connecting portion along the third direction to a length of the first edge along the third direction falls within the range [1 / 4, 1 / 2]. Further, a ratio of a length of the second connecting portion along the third direction to a length of the second edge along the third direction falls within the range [1 / 4, 1 / 2].

[0026] Furthermore, the ratio of the length of the first connecting portion along the third direction to the length of the first edge along the third direction falls within the range [1 / 3, 1 / 2]. Furthermore, the ratio of the length of the second connecting portion along the third direction to the length of the second edge along the third direction falls within the range [1 / 3, 1 / 2]. When the length of the connecting portion is set within the above range, the swing arm effect on both sides of the connecting portion is reduced, and the installation stability of the curved mirror is enhanced.

[0027] In another possible implementation of the first aspect, the outer contour of the mirror body is a rectangle, the rectangle includes a first short side and a second short side, the first short side is a first edge, and the second short side is a second edge.

[0028] In the above embodiment, the two protruding connecting parts are arranged on the short side to reduce the thickness of the shell on the long side, which is conducive to the development of a high screen-to-body ratio, makes the shape more beautiful, and enhances the user experience. Considering some possible situations, when the light beam reflected by the curved mirror is a horizontal screen, reducing the thickness of the shell on the long side can solve the problems of "wide chin" and "thick" forehead of the optical display device, and the shape is more simple and beautiful. Moreover, when the aspect ratio of the mirror body is large, such as greater than 1.5 or greater than 1.7, arranging the connecting part on the short side, combined with the curved surface, can effectively reduce the swing arm effect and improve the assembly stability of the curved mirror.

[0029] In another possible implementation of the first aspect, the outer contour of the mirror body is a rectangle, the rectangle includes a first long side and a second long side, the first long side is a first edge, and the second long side is a second edge.

[0030] Considering some possible situations, when the curved mirror is used to reflect a light beam for a vertical screen, reducing the thickness of the shell on the short side can solve the problems of "wide chin" and "thick" forehead of the optical display device, making the shape more simple and beautiful.

[0031] In another possible implementation of the first aspect, the first connecting portion includes a first positioning portion. A third positioning portion may be provided on the housing or connecting structure on which the curved mirror is mounted, correspondingly cooperating with the first positioning portion. This embodiment can position the connecting portion while also limiting rotation of the curved mirror relative to the housing (or mounting structure), thereby improving the positional stability of the curved mirror relative to the housing and, consequently, the quality of the output light beam.

[0032] Exemplarily, the first positioning portion includes a first positioning groove for accommodating a first positioning post. Optionally, the positioning post may be a pin, etc. Exemplarily, the first positioning portion includes a first positioning hole, which extends through the first connecting portion along the thickness direction of the first connecting portion. The first positioning hole is for receiving the first positioning post. Optionally, the positioning post may be a pin, or a fastener such as a screw.

[0033] In another possible implementation of the first aspect, the second connecting portion includes a second positioning portion. Exemplarily, the second positioning portion includes a second positioning groove. More exemplary, the second positioning portion includes a second positioning hole.

[0034] In another possible implementation of the first aspect, the first connecting portion includes a first positioning surface and a second positioning surface, and the first positioning surface and the second positioning surface are both planes and perpendicular to the first direction.

[0035] In the above embodiment, the positioning surface realizes the positioning of the connecting part, and the surface contact is more stable. At the same time, it can also limit the rotation of the curved mirror relative to the shell (or mounting structure), thereby improving the position stability of the curved mirror relative to the shell, and thus improving the quality of the output light beam.

[0036] Optionally, the first connecting portion includes a first positioning groove recessed in the first positioning surface.

[0037] In another possible implementation of the first aspect, the second connecting portion includes a third positioning surface and a fourth positioning surface, both of which are planes and perpendicular to the first direction. Optionally, the second connecting portion includes a second positioning groove recessed in the third positioning surface.

[0038] In a second aspect, the present application provides a projection device, which includes a shell and the curved mirror described in any one of the first aspects, the shell including a first receiving portion and a second receiving portion arranged on the shell, the first connecting portion being fixed to the first receiving portion, and the second connecting portion being fixed to the second receiving portion.

[0039] In another possible embodiment of the second aspect, the projection device further includes a first pressing plate and a second pressing plate, the first connecting portion of the curved mirror is accommodated in the first accommodating portion, the first pressing plate is used to press the first connecting portion tightly into the first accommodating portion, the second connecting portion of the curved mirror is accommodated in the second accommodating portion, and the second pressing plate is used to press the second connecting portion tightly into the second accommodating portion.

[0040] In another possible embodiment of the second aspect, the first housing portion includes a first bottom wall, the first connecting portion includes a first positioning surface and a second positioning surface perpendicular to the normal of the first surface of the curved mirror, the first positioning surface and the second positioning surface are arranged opposite to each other along the normal of the first surface, the first bottom wall is used to abut against the first positioning surface, and the first pressing plate is used to abut against the second positioning surface.

[0041] In another possible implementation of the second aspect, the first receiving portion further includes a first positioning column protruding from the first bottom wall, and the first connecting portion further includes a first positioning groove recessed in the first positioning surface, and the first positioning groove is used to accommodate the first positioning column.

[0042] In one possible implementation of the second aspect, the projection device further includes a first gasket disposed between the first pressing plate and the first connecting portion. Optionally, the first gasket is made of an elastic material, or has an elastic structure, such as a metal spring, a non-metal spring, or a spring structure.

[0043] In another possible embodiment of the second aspect, the second housing portion includes a second bottom wall, the second connecting portion includes a third positioning surface and a fourth positioning surface that are perpendicular to the normal of the first surface of the curved mirror, the third positioning surface and the fourth positioning surface are arranged opposite to each other along the normal of the first surface, the second bottom wall is used to abut against the third positioning surface, and the second pressing plate is used to abut against the fourth positioning surface.

[0044] In another possible implementation of the second aspect, the second receiving portion further includes a second positioning column protruding from the second bottom wall, and the second connecting portion further includes a second positioning groove recessed in the third positioning surface, and the second positioning groove is used to accommodate the second positioning column.

[0045] In another possible implementation of the second aspect, the projection device further includes a second gasket disposed between the second pressing plate and the second connecting portion. Optionally, the second gasket is made of an elastic material, or has an elastic structure, such as a metal spring, a non-metal spring, or a spring structure.

[0046] In another possible embodiment of the second aspect, the outer contour of the curved mirror is a rectangle, the rectangle includes a first long side, a second long side, a first short side and a second short side, the first connecting portion and the second connecting portion are respectively arranged on the first short side and the second short side, the shell also includes a side wall arranged around the curved mirror, and the light source mounting portion is on the side wall of the shell close to the long side of the curved mirror.

[0047] In a third aspect, the present application further provides a display device, comprising a light source unit, and further comprising the projection device described in any one of the second aspects, wherein the light source unit is mounted on a sidewall of a housing of the projection device near a long side of the curved mirror. The light source unit is configured to generate imaging light, and the mirror body of the projection device is configured to reflect the imaging light out of the housing.

[0048] In a fourth aspect, the present application further provides a seat, comprising the projection device described in any one of the second aspects, wherein the projection device is mounted on the backrest, headrest or neck of the seat.

[0049] In a fifth aspect, the present application also provides a seat, comprising the display device described in the third aspect, wherein the display device is mounted on the backrest, headrest or neck of the seat.

[0050] In the sixth aspect, the present application also provides a terminal, which includes the curved mirror described in any one of the first aspects, or includes the projection device described in any one of the second aspects, or includes the display device described in the third aspect, or includes the seat described in the fourth aspect, or includes the seat described in any one of the fifth aspects.

[0051] Optionally, the terminal is a movable terminal, for example, having a travel system, such as one or more of rollers, chains, engines, or power batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] FIG1 is a schematic structural diagram of a vehicle;

[0053] FIG2 is a diagram showing the imaging principle of a display device;

[0054] FIG3 is a diagram showing the imaging principle of another display device;

[0055] FIG4 is a schematic structural diagram of a curved mirror provided in an embodiment of the present application;

[0056] FIG5 is a schematic diagram of the axis of a curved mirror provided in an embodiment of the present application;

[0057] FIG6 is a comparative schematic diagram of the arrangement position of a connection portion provided in an embodiment of the present application;

[0058] FIG7 is a schematic diagram of a fixing function of a connecting portion provided in an embodiment of the present application;

[0059] FIG8 is a schematic diagram of another fixing function of a connecting portion provided in an embodiment of the present application;

[0060] FIG9 is a schematic diagram of the outer contour of a connecting portion provided in an embodiment of the present application;

[0061] FIG10 is an exploded schematic diagram of a projection device provided in an embodiment of the present application;

[0062] FIG11 is a schematic diagram of the overall structure of a projection device provided in an embodiment of the present application;

[0063] FIG12 is a schematic diagram of a partial structure of a projection device provided in an embodiment of the present application;

[0064] FIG13 is a schematic structural diagram of the local structure shown in FIG12 taken along line AA;

[0065] FIG14 is a schematic structural diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0066] In recent years, an increasing number of optical display devices have been integrated into terminals, such as projectors, heads-up displays (HUDs), in-vehicle displays (such as light field screens), and headlights. Taking the optical display devices in vehicles as an example, these can project image light onto locations such as the windshield, screens, the front of the vehicle, and the outside of the doors. They can also use virtual images to present large-screen images directly in front of the passengers' eyes, comprehensively enhancing vehicle performance and the passenger experience.

[0067] Referring to FIG. 1 , FIG. 1 is a schematic diagram of a vehicle structure. Vehicle 100 is provided with a display device 10. Display device 10 may be mounted on the vehicle's instrument panel (IP) or on a seat in vehicle 100. The seats may include multiple rows, for example, front seats 20 positioned relatively forward and rear seats 30 positioned relatively rearward.

[0068] Please refer to Figures 1 and 2 in conjunction. Figure 2 is a diagram of the imaging principle of a display device. Taking the display device 10 installed in front of the main driver's seat of the IP station as an example, the display device 10 can include a light source unit 1, a curved mirror 2, and an optical element 3. The light source unit 1 can generate imaging light, which is reflected by the optical element 3 and the curved mirror 2 and projected onto the windshield 40 (or the curtain of the windshield 40). The human eye receives the imaging light and presents a virtual image at a certain distance in front of the human eye. In this way, the driver can see some driving-related information without looking down, such as the vehicle's own status (such as speed, fuel level, battery level, engine speed, or driving distance, etc.), obstacles, the distance to obstacles, road regulations (such as speed limit information, distance camera position), route information, hazard warning information, etc., one or more of which enhances the driver's driving experience and driving safety. Optionally, the optical element 3 can be a reflector.

[0069] Please refer to Figures 1 and 3 in conjunction. Figure 3 is a diagram illustrating the imaging principle of another display device. Taking display device 10 mounted in front of the passenger seat of an IP platform and a display device mounted on front seat 20 as examples, display device 10 may include a light source unit 1, a curved mirror 2, and a transflective optical element 4. Light source unit 1 generates imaging light, which is reflected by transflective optical element 3, then by curved mirror 2, and then passes through transflective optical element 4 to the human eye. The human eye receives the imaging light and presents a virtual image at a certain distance in front of the eye, thereby transcending the space limitations of the vehicle cabin and providing passengers with a large-screen viewing experience.

[0070] It can be seen that curved mirrors are often set in optical display devices to reflect imaging light. The stable installation of curved mirrors is conducive to improving the output quality of imaging light and enhancing user experience.

[0071] The present application provides a curved mirror, a projection device, a display device, a seat and a terminal, which can improve the assembly stability and assembly accuracy of the curved mirror, reduce the possibility of irregular deformation of the curved mirror, and enhance the user experience.

[0072] The following first introduces the curved mirror provided in the embodiment of the present application.

[0073] The embodiment of the present application provides a curved mirror 2, which is an optical element with a curved reflective surface. The curved surface can be a spherical surface, an aspheric curved surface, or a free-form surface. Aspheric surfaces generally refer to quadratic surfaces such as paraboloids, ellipsoids, involutes, hyperboloids, and higher-order curved surfaces with a rotation axis, as well as non-rotating aspheric surfaces, such as off-axis aspheric surfaces. A free-form surface is an optical structure with a more complex surface shape. The radius of curvature of each point on its surface is different, and the degree of freedom of the surface shape is very high. The surface shape structure of a free-form surface is complex, the degree of freedom is high, and there is no clear expression to define it. It is generally believed that an optical surface that does not have global rotational symmetry, does not have a unified optical axis, and has multiple radii of curvature on the entire surface is an optical free-form surface.

[0074] In some possible implementations, the curved mirror 2 is a free-form reflector. Free-form surfaces not only replace multiple aspheric surfaces to correct aberrations, but also maximize optical quality and streamline the optical structure. In other possible implementations, the curved mirror 2 is a spherical reflector or an aspheric reflector.

[0075] Please refer to Figure 4, which is a schematic diagram of the structure of a curved mirror provided in an embodiment of the present application. The curved mirror 2 includes a mirror body 21, a first connecting portion 22, and a second connecting portion 23. The first connecting portion 22 and the second connecting portion 23 are used to secure the curved mirror 2. For example, the first connecting portion 22 and the second connecting portion 23 are fixedly connected to the housing and / or the mounting structure, thereby stabilizing the position of the curved mirror 2 and preventing the curved mirror 2 from moving and / or rotating.

[0076] The mirror body 21 includes a first surface 211, a second surface 212, a first edge 213, and a second edge 214. The first surface 211 is a curved surface, such as a spherical surface, an aspherical curved surface, or a free-form surface. The normal to the first surface 211 is a first direction. For example, in the coordinate system shown in FIG4 , the normal to the first surface 211 is the Z direction. The first surface 211 and the second surface 212 are disposed opposite to each other along a first direction, and the first edge 213 and the second edge 214 are disposed opposite to each other along a second direction (the X direction shown in FIG4 ), where the first direction is different from the second direction.

[0077] The first connecting portion 22 protrudes from the first edge 213, and the second connecting portion 23 protrudes from the second edge 214. Referring to Figure 5 , because the first and second connecting portions protrude from the edges, the length d1 of the first connecting portion along the third direction (the Y direction shown in Figure 4 ) is less than the length d3 of the first edge along the third direction, and the length d2 of the second connecting portion along the third direction is less than the length d4 of the second edge along the third direction. The third direction is different from the first direction, and the third direction is different from the second direction. Furthermore, the third direction is perpendicular to the first direction, and the third direction is perpendicular to the second direction.

[0078] In the embodiment of the present application, the first connecting portion 22 is roughly arranged at the middle part of the first edge 213, and the second connecting portion 23 is roughly arranged at the middle part of the second edge 214. Exemplarily, the first connecting portion 22 passes through the midpoint of the first edge 213, and / or the second connecting portion 23 passes through the midpoint of the second edge 214. In the present application, the curved mirror 2 is fixed by two connecting portions arranged at the first edge 213 and the second edge 214, which can improve the assembly stability and assembly accuracy of the curved mirror, improve the accuracy and stability of the light path formed by the curved mirror, and can significantly improve the output quality of the light beam. Moreover, the present application uses two connecting portions to fix the curved mirror 2. The curved mirror can be fixed by connecting and fixing it with the connecting portions, and the number of connecting portions is also relatively small, which is easy to install and reduces the assembly steps of the curved mirror 2.

[0079] In one possible embodiment, the first direction is perpendicular to the second direction. In other embodiments, the first direction is different from the second direction but not perpendicular to each other. It is understandable that the first direction is perpendicular to the second direction in order to better illustrate the relative positions of the first edge 213, the second edge 214, the first surface 211, and the second surface 212. The first direction and the second direction may not be completely perpendicular. For example, due to manufacturing process accuracy, measurement errors, the addition of additional components, etc., one or more of the first edge 213, the second edge 214, the first surface 211, and the second surface 212 may have other designs in terms of size, shape, etc., so that the first direction and the second direction are not perpendicular.

[0080] In some other possible implementations, the first edge 213 and the second edge 214 are two non-adjacent edges, that is, the first edge 213 and the second edge 214 are not connected.

[0081] Furthermore, the first connecting portion 22 and the second connecting portion 23 are arranged in the middle part of the two edges arranged opposite to each other. After the curved mirror 2 is fixed, the forces on each part of the mirror body 21 are more uniform and regular, and the surface shape of the curved surface is stable. Referring to Figure 4, it can be seen that the curved surface can form a symmetrical structure, and the middle part of the edge is subjected to a preload when fixed. The action of the preload is also relatively regular, so that the deformation of the surface shape of the curved surface is also relatively regular. The stress caused by thermal expansion basically reaches its maximum at the connection parts on both sides, and the deformation caused by the stress is also relatively regular. In short, when the forces such as preload, gravity, and stress caused by thermal expansion act together, the forces on each part of the curved surface are relatively regular. For example, the forces on the left and right sides are basically symmetrical. Such regular force reduces the possibility of irregular deformation of the curved mirror, thereby avoiding distortion of the light spot passing through the curved mirror and improving the user experience.

[0082] Furthermore, the mirror body also includes other edges, such as a third edge 215 and a fourth edge 216, while no connection portion is provided on the other edges. It is understandable that when a connection portion is provided on the edge, a corresponding space for accommodating the protruding connection portion needs to be provided on the shell or the mounting structure. Therefore, if connections are provided on multiple edges, the occupied space of the shell or the mounting structure will be greatly increased, which is not conducive to the development of a high screen-to-body ratio. However, in the embodiment of the present application, a connection portion is only provided on the first edge 213 and the second edge 214, so that the thickness of the portion of the shell or the mounting structure that is connected to the other edges is smaller, which is conducive to the development of a high screen-to-body ratio, the shape is more beautiful, and the user experience is enhanced.

[0083] In some possible implementations, the first connecting portion 22, the second connecting portion 23, and the mirror body 21 are integrally connected. In this case, the curved mirror can be an integrally molded device, further improving stability. Alternatively, the curved mirror can be a one-piece casting and integrally molded product.

[0084] Considering some possible situations, when the connection part is set at the corner, the flow path of the product injection molding process is easily affected by the space of the connection part at the corner, resulting in ripples and uneven surface of the curved mirror. However, this application sets the connection part in the middle of the edge. During the product molding process, the injection molding can flow evenly, the surface shape of the product after molding has little fluctuation, and the possibility of ripples forming on the curved mirror can be reduced, which effectively optimizes the surface optical effect, thereby avoiding the distortion of the light spot passing through the curved mirror and improving the user experience.

[0085] Optionally, the second surface 212 is also a curved surface. The curved surface may be one or more of a spherical surface, an aspherical curved surface, or a free-form surface. For example, the first surface 211 and the second surface 212 may be free-form surfaces, and the radius of curvature at each point on the surface may be different. Furthermore, the first surface 211 and the second surface 212 may be different free-form surfaces.

[0086] As a possible implementation, the spacing between the central axis of the first connecting portion 22 along the third direction (e.g., the Y direction shown in FIG. 4 ) and the central axis of the first edge 213 along the third direction is relatively small, for example, less than 1 / 5 of the length of the first edge 213 along the third direction. Due to the relatively small spacing between the central axes, the first connecting portion 22 is positioned near the central axis of the first edge 213, i.e., in the middle portion of the first edge 213. In some embodiments, both edges of the first connecting portion 22 along the third direction are spaced apart from both ends of the first edge in the third direction. In other words, referring to FIG. 4 , the first connecting portion 22 is not in contact with either the third edge 215 or the fourth edge 216.

[0087] As another possible implementation, the distance between the central axis of the second connecting portion 23 along the third direction and the central axis of the second edge 214 along the third direction is relatively small, for example, less than 1 / 5 of the length of the second edge 214 along the third direction. In some embodiments, both edges of the first connecting portion 22 along the third direction are spaced apart from both ends of the first edge in the third direction. In other words, referring to FIG. 4 , the first connecting portion 22 does not contact either the third edge 215 or the fourth edge 216.

[0088] Referring to FIG5 , taking the curved mirror 2 as an example of bilateral symmetry, along the third direction (i.e., the Y direction), the central axis 24 of the first edge 213 and the second edge 214 is relatively close to the central axis 25 of the first connecting portion 22 and the second connecting portion 23. For example, in the Y direction, the length of the first edge 213 is d3, and the distance between the central axis 25 of the first connecting portion 22 and the central axis 24 of the first edge 213 is y2. Similarly, the length of the second edge 214 is d4, and the distance between the central axis 25 of the second connecting portion 23 and the central axis 24 of the second edge 214 is y1.

[0089] In some possible embodiments, one or more of the length, shape, included structure, and location on the provided edge, etc., of the first and second connecting portions may be identical. In still other possible embodiments, one or more of the length, shape, included structure, and location on the provided edge, etc., of the first and second connecting portions may differ. For example, in the Y direction, the first connecting portion 22 and the second connecting portion 23 may have the same length, but the spacing between the first connecting portion 22 and the third edge 215 may differ from the spacing between the second connecting portion 23 and the third edge 215. For example, in FIG. 5 , the first connecting portion 22 may be closer to the third edge 215 than the second connecting portion 23.

[0090] In some possible implementations, the central axis of the first connecting portion along the third direction coincides with the central axis of the first edge along the third direction, and the central axis of the second connecting portion along the third direction coincides with the central axis of the second edge along the third direction. This can further enhance the installation stability of the curved mirror, improve the surface stability of the curved surface, make the forces applied to each part of the curved surface more regular, and further reduce the possibility of irregular deformation of the curved mirror.

[0091] Since the projection of the curved mirror on the ZY plane is a curve, when the connecting portion (represented by the shaded portion) is set in the middle, the face difference across the Z direction is smaller. Correspondingly, when it is set at a position away from the center, the face difference across is larger. The smaller the face difference, the more conducive it is to maintaining the stable installation of the curved mirror and maintaining the uniform change of the surface shape of the curved mirror when it is subjected to force. Please refer to Figure 6, which is a comparative schematic diagram of the setting position of the connecting portion. Taking the length of the connecting portion along the Y direction as d, when the connecting portion is set in the middle position, its face difference can be expressed as z1. When the connecting portion is set at the edge, its face difference across can be expressed as z2. It can be seen that under the same length d, z1<z2. Therefore, it can be seen that when the connecting portion is set in the middle position, it can be beneficial to the stability of the surface shape of the curved surface.

[0092] In some scenarios, the pouring outlet can be positioned near the central axis of the third edge 215 along the second direction (i.e., the X direction), allowing the material to diffuse and flow around. In this case, when the surface difference between the connecting portion and the mirror body is small, the transition from the curved surface to the connecting portion is smoother (as shown in FIG. 13 , the transition between the second surface 212 and the second positioning surface 223 of the first connecting portion 22 is smooth), further reducing the possibility of wave patterns during pouring and improving the surface smoothness of the curved mirror.

[0093] In some possible implementations, the connection portion may fix the curved mirror in the first direction, the second direction, and the third direction.

[0094] The following describes an exemplary schematic diagram of the fixing function of the connecting portion in conjunction with Figures 7 and 8. As shown in Figure 7, when the protruding first connecting portion 22 and the second connecting portion 23 are installed, by providing structural members on the outer sides of the protrusions, such as structural members 511, 512, 513, and 514 shown in Figure 7, the first connecting portion 22 and the second connecting portion 23 can be clamped in the third direction (the Y direction shown in Figure 7) and the second direction (the X direction shown in Figure 7), thereby preventing the curved mirror from causing significant displacement in the third direction and the second direction.

[0095] For example, when the curved mirror 2 moves along the positive direction of the X-axis shown in Figure 7, the second edge 214 can abut against the structural member 513 and the structural member 513, thereby preventing it from producing a large displacement. Similarly, when the curved mirror 2 moves along the negative direction of the X-axis shown in Figure 7, the first edge 213 can be subjected to the resistance provided by the structural member 511 and the structural member 512. For example, when the curved mirror 2 moves along the positive direction of the Y-axis shown in Figure 7, the first connecting portion 22 and the second connecting portion 23 abut against the structural member 513 and the structural member 511, respectively, thereby preventing it from producing a large displacement. Similarly, when the curved mirror 2 moves along the negative direction of the Y-axis shown in Figure 7, the first connecting portion 22 and the second connecting portion 23 abut against the structural member 514 and the structural member 512, respectively. It should be understood that the aforementioned structural members 511 to 512 are merely for the convenience of illustrating the positional relationship. In a specific implementation, some structural members can be provided as an integral part. For example, as shown in FIG. 10 below, the structural member 511 , the structural member 512 , the structural member 513 and the structural member 514 may be a part of the housing 6 .

[0096] The positioning method shown in FIG. 7 is merely an example. Positioning in the second and / or third directions can be controlled by other methods during implementation. For example, the first edge 213 and the second edge 214 can be spaced apart from the structural member, and displacement in the X-direction can be controlled by moving the first and second connecting portions 22 and 23 away from the raised edges and abutting the housing or mounting structure. For another example, positioning in the second and / or third directions can be achieved by providing positioning portions on the first and second connecting portions 22 and 23 (described below).

[0097] As shown in Figure 8, the protruding first connecting portion 22 and the second connecting portion 23 can be pressed in a normal direction perpendicular to the first surface during installation, for example, by the structural members 515 and 516 on both sides, thereby avoiding displacement in the normal direction of the first surface and preventing the curved mirror 2 from rotating around the second direction (the X direction as shown in Figure 8).

[0098] In summary, the first connecting portion 22 and the second connecting portion 23 designed in this application can improve the stability and assembly accuracy of the curved mirror 2. In particular, when the curved mirror 2 is installed in an environment that is frequently bumpy or shaky, such as when installed in a mobile terminal, it can have good anti-shake characteristics, preventing users from experiencing dizziness and other discomfort caused by viewing images produced by the curved mirror, thereby improving the user experience.

[0099] In some possible implementations, a ratio of a length of the first connecting portion along the third direction to a length of the first edge along the third direction falls within the range [1 / 4, 1 / 2]. Similarly, a ratio of a length of the second connecting portion along the third direction to a length of the second edge along the third direction falls within the range [1 / 4, 1 / 2].

[0100] Furthermore, the ratio of the length of the first connecting portion along the third direction to the length of the first edge along the third direction falls within the range [1 / 3, 1 / 2]. Furthermore, the ratio of the length of the second connecting portion along the third direction to the length of the second edge along the third direction falls within the range [1 / 3, 1 / 2]. Thus, when the length of the first connecting portion is set within the above range, the swing arm effect on both sides of the connecting portion can be reduced, thereby enhancing the installation stability of the curved mirror.

[0101] For example, the ratio of the length of the first connecting portion 22 along the third direction to the length of the first edge 213 along the third direction is 1 / 3. This provides stability when the curved mirror is fixed, and the transition between the surface of the first connecting portion along the first direction and the curved surface of the curved mirror is relatively smooth, thereby improving the installation stability of the curved surface and ensuring the stability of the curved mirror's surface shape. Similarly, the ratio of the length of the second connecting portion 23 along the third direction to the length of the second edge 214 along the third direction can also be 1 / 3.

[0102] In some possible embodiments, the outer contour of the mirror body 21 is a rectangle, and the rectangle includes a first short side and a second short side, the first short side is a first edge 213, and the second short side is a second edge 214. As shown in Figure 7, the outer contour of the mirror body 21 is a rectangle, wherein the first edge 213 and the second edge 214 are short sides, and the third edge 215 and the fourth edge 216 are long sides. In this way, the thickness of the shell on the long side can be reduced, which is conducive to the development of a high screen-to-body ratio, the shape is more beautiful, and the user experience is enhanced. Considering some possible situations, when the light beam used to reflect the curved mirror is a horizontal screen, reducing the thickness of the shell on the long side can solve the problems of "wide chin" and "thick" forehead of the optical display device, and the shape is more simple and beautiful.

[0103] In some possible cases, when the aspect ratio of the mirror body 21 is large, for example, greater than 1.5 or greater than 1.7, the connecting part is set on the short side. Combined with the curved surface, it can effectively reduce the swing arm effect and improve the assembly stability of the curved mirror.

[0104] In some possible implementations, the outer contour of the mirror body 21 is a rectangle, which includes a first long side and a second long side, the first long side being a first edge 213, and the second long side being a second edge 214. As shown in FIG9 , the first edge 213 and the second edge 214 are long sides, and the third edge 215 and the fourth edge 216 are short sides.

[0105] Considering some possible situations, when the curved mirror is used to reflect a light beam for a vertical screen, reducing the thickness of the shell on the short side can solve the problems of "wide chin" and "thick" forehead of the optical display device, making the shape more simple and beautiful.

[0106] In some possible embodiments, the first connecting portion 22 includes a first positioning portion 221. A third positioning portion may be provided on the housing or connecting structure on which the curved mirror 2 is mounted, correspondingly cooperating with the first positioning portion 221. The first positioning portion 221 allows for positioning of the first connecting portion 22 while also limiting rotation of the curved mirror relative to the housing (or mounting structure), thereby improving the positional stability of the curved mirror relative to the housing and, consequently, the quality of the output light beam.

[0107] 4 , 7 and 9 , the first positioning portion 221 is a first positioning groove, which is used to accommodate a first positioning column. Optionally, the positioning column can be a pin or the like.

[0108] As another example, the first positioning portion 221 is a first positioning hole that extends through the first connecting portion 22 along the thickness direction of the first connecting portion (e.g., the Z direction as shown in FIG7 ). The first positioning hole is used to pass through a first positioning post. Optionally, the positioning post can be a pin or a fastener such as a screw.

[0109] Similarly, the second connecting portion 23 includes a second positioning portion 231. Exemplarily, the second positioning portion includes a second positioning groove. More exemplary, the second positioning portion includes a second positioning hole.

[0110] In some possible embodiments, the first connecting portion 22 includes a first positioning surface 222 and a second positioning surface 223. Referring to Figures 4, 7, and 9, the first positioning surface 222 and the second positioning surface 223 are disposed opposite each other along the normal direction of the first surface, i.e., the first direction (Z direction). Exemplarily, the first positioning surface 222 and the second positioning surface 223 are both planar and perpendicular to the first direction.

[0111] In the above embodiment, the positioning surface realizes the positioning of the connecting part, and the surface contact is more stable. At the same time, it can also limit the rotation of the curved mirror relative to the shell (or mounting structure), thereby improving the position stability of the curved mirror relative to the shell, and thus improving the quality of the output light beam.

[0112] Optionally, the first connecting portion 22 includes a first positioning groove recessed in the first positioning surface 222 .

[0113] In some possible embodiments, the second connecting portion 23 includes a third positioning surface 232 and a fourth positioning surface 233. Referring to Figures 4 and 7 , the third positioning surface 232 and the fourth positioning surface 233 are disposed opposite each other along the normal direction of the first surface, i.e., the first direction (Z direction). Exemplarily, both the third positioning surface 232 and the fourth positioning surface 233 are planar and perpendicular to the first direction.

[0114] Optionally, the second connection portion 23 includes a second positioning groove recessed in the third positioning surface 232 .

[0115] In some possible implementations, the curved mirror 2 is provided with a reflective layer (eg, a reflective coating) to form a reflective surface for reflecting imaging light. The reflective surface may be located on the first surface 211 or the second surface 212 .

[0116] It should be understood that the positions of the two oppositely disposed components in the first and second edges, the third and fourth edges, and the first and second surfaces shown in Figure 4 can be reversed. The positional relationships shown in this application are only examples.

[0117] The following describes a projection device including a curved mirror.

[0118] The present embodiment provides a projection device comprising a housing and the aforementioned curved mirror 2. The housing has a space for accommodating the curved mirror and a receiving portion for accommodating the first connecting portion 22 and the second connecting portion 23 of the curved mirror 2. The receiving portion can be connected to the first connecting portion 22 and the second connecting portion 23. Referring to Figures 10, 11, 12, and 13, the housing 6 includes a first receiving portion 61 and a second receiving portion 62 disposed thereon. The first connecting portion 22 is fixed to the first receiving portion 61, and the second connecting portion 23 is fixed to the second receiving portion 62.

[0119] In some possible embodiments, the projection device further includes a first pressing plate 71 and a second pressing plate 72. The first connecting portion 22 of the curved mirror 2 is received in the first receiving portion 61, and the first pressing plate 71 is used to press the first connecting portion 22 tightly into the first receiving portion 61. Furthermore, the second connecting portion 23 of the curved mirror 2 is received in the second receiving portion 62, and the second pressing plate 72 is used to press the second connecting portion 23 tightly into the second receiving portion 62. In other words, the cooperation between the first connecting portion 22, the first receiving portion 61, and the first pressing plate 71, as well as the cooperation between the second connecting portion 23, the second receiving portion 62, and the second pressing plate 72, can position the curved mirror 2 on the housing 6.

[0120] The following describes the assembly method of the first receiving portion 61 and the first connecting portion 22 as an example. In some cases, the assembly method of the second receiving portion 62 and the second connecting portion 23 is the same as the assembly method of the first receiving portion 61 and the first connecting portion 22.

[0121] Please refer to Figures 10 to 13. The first receiving portion 61 includes a first bottom wall 611, and the first connecting portion 22 includes a first positioning surface 222 and a second positioning surface 223 that are perpendicular to the normal of the first surface 211 of the curved mirror. The first positioning surface 222 and the second positioning surface 223 are arranged opposite to each other along the normal of the first surface. The first bottom wall 611 is used to abut against the first positioning surface 222, and the first pressing plate 71 is used to abut against the second positioning surface 223. Optionally, the first positioning surface 222 of the first connecting portion 22 is arranged parallel to the second positioning surface 223. Or optionally, the first positioning surface 222 and the second positioning surface 223 are arranged non-parallel. Optionally, the first connecting portion 22 is provided with a first positioning surface 222 on the side facing the first bottom wall 611, which abuts or fits against the first bottom wall 611 (as shown in Figures 4 and 13). Furthermore, the first bottom wall 611 is parallel to and abuts against the first positioning surface 222. Optionally, the first pressing plate and the second pressing plate may be, but are not limited to, sheet metal, die-cast, or plastic. As can be seen, the first pressing plate 71 constrains the position of the curved mirror 2 between the housing 6 and the first pressing plate 71, thereby positioning the curved mirror 2 in the first direction and limiting rotation of the curved mirror 2 in the second and third directions. This further improves the positional stability of the curved mirror 2 relative to the housing 6, thereby improving the imaging quality of the imaging light passing through the curved mirror 2.

[0122] In some possible embodiments, the first receiving portion 61 further includes a first positioning post 612 protruding from the first bottom wall 611. The shape of the first positioning post 612 can be square, conical, or the like, and this application does not limit the shape of the first positioning post 612. The first connecting portion 22 further includes a first positioning groove (or referred to as a first positioning portion 221) recessed in the first positioning surface 222. The first positioning groove is used to accommodate the first positioning post 612. Referring to Figures 4 and 13, the first positioning post 612 on the housing 6 is accommodated within the first positioning portion 221 in the first connecting portion 22. On the one hand, the cooperation between the first positioning post 612 and the first positioning portion 221 facilitates the assembly of the curved mirror 2 and the housing 6, improving the assembly accuracy and efficiency of the projection device. On the other hand, the assembly between the first positioning post 612 and the first positioning portion 221 prevents the curved mirror 2 from undergoing significant displacement in the second direction (the X direction as shown in Figure 4) and the third direction (the Y direction as shown in Figure 4), thereby further improving the installation stability of the curved mirror 2.

[0123] In some possible embodiments, the first pressing piece 71 is fixedly connected to the housing 6, for example, by a snap fastener, a fastener, or the like. Referring to Figures 10 and 11 , a first fastener 91 is disposed between the first pressing piece 71 and the housing 6. The first fastener 91 applies force to the first pressing piece 71, which presses the first connecting portion 22 against the first bottom wall 611.

[0124] Optionally, the first fixing member 91 is a screw, and a threaded hole is provided on the housing 6. The first fixing member 91 passes through the connection hole 711 provided on the first pressing plate 71 and is screwed to the housing 6. Optionally, a self-tapping screw column or an in-mold injection nut can be provided on the housing 6 to cooperate with the first fixing member 91 to fix the first pressing plate 71.

[0125] Optionally, a positioning hole 712 is further provided on the first pressing plate 71, and a protruding positioning pin is further provided on the housing 6. The positioning hole 712 cooperates with the positioning pin to improve the assembly efficiency of the first pressing plate 71. Due to the difference in the materials used, the thermal expansion coefficients of the curved mirror 2 and other matching components of the projection device (such as the housing 6) are usually different. This makes the curved mirror susceptible to being squeezed by other matching components and deformed when the ambient temperature changes greatly. Taking the curved mirror 2 and the housing 6 as an example, when the ambient temperature of the projection device is greater than a preset temperature (such as 70 degrees Celsius or 90 degrees Celsius), the curved mirror 2 and the housing 6 are deformed due to thermal expansion, and the housing 6 may squeeze the curved mirror. Once the curved mirror 2 is deformed, the optical path of the imaging light reflected by the deformed portion is distorted, affecting the quality of the imaging light output.

[0126] In some possible embodiments, the thermal expansion coefficient of the curved mirror 2 is different from that of the housing 6. Taking into account the thermal expansion factors of the housing 6 and the curved mirror 2, a gap is reserved between the edges of the curved mirror 2 (including one or more of the first edge 213, the second edge 214, the third edge 215, the fourth edge 216, the edge of the first connecting portion 22, and the edge of the second connecting portion 23) and the housing to reserve space for thermal expansion of the curved mirror 2 and the housing 6, reduce the possibility of deformation of the curved mirror 2 due to extrusion, and improve the stability of the optical path.

[0127] 13 , there is a gap between the sidewall of the first connecting portion 22 away from the mirror body and the sidewall 613 of the first receiving portion 61 . Furthermore, there is a gap between the protruding end of the first positioning post 612 and the bottom wall of the first positioning portion 221 .

[0128] In some possible embodiments, the projection device further includes a first gasket 81, which is sandwiched between the first pressing plate 71 and the first connecting portion 22. Optionally, the first gasket 81 is made of an elastic material, such as a rubber strip, foam, silicone rubber, or other elastomeric material. In some embodiments of the present application, the hardness of the first pressing plate 71 is greater than that of the first gasket 81.

[0129] Alternatively, the first gasket is an elastic structure, such as a metal spring, a non-metal spring, or a spring structure.

[0130] On the one hand, the first gasket 81 can reduce the possibility of the first connecting part 22 being damaged due to the compression of the first pressing plate 71. On the other hand, the first gasket 81 can absorb the impact force of vibration and bumps, improve the shock resistance of the projection device, and thus improve the quality of the output imaging light. On the other hand, the first gasket 81 can absorb the stress generated by the thermal expansion of the first connecting part 22, reduce the possibility of deformation of the curved mirror 2 due to extrusion, and improve the stability of the optical path.

[0131] Optionally, a fifth positioning portion 811 may be provided on the first gasket 81, and a corresponding sixth positioning portion 713 may be provided on the first pressing plate 71. The fifth positioning portion 811 and the sixth positioning portion 713 may cooperate to position the first gasket 81. This can improve installation efficiency and prevent the first gasket 81 from slipping, thereby enhancing the overall structural stability of the projection device.

[0132] As mentioned above, the assembly method of the second connecting portion 23 and the second receiving portion 62 can be the same as the assembly method of the first receiving portion 61 and the first connecting portion 22. The following briefly introduces the assembly process of the second receiving portion 62 and the second connecting portion 23, and its related concepts and effects can be referred to above.

[0133] In some possible embodiments, the second receiving portion 62 includes a second bottom wall, the second connecting portion 23 includes a third positioning surface 232 and a fourth positioning surface 233 that are perpendicular to the normal of the first surface 211 of the curved mirror 2, the third positioning surface 232 and the fourth positioning surface 233 are arranged opposite to each other along the normal of the first surface 211, the second bottom wall is used to abut against the third positioning surface 232, and the second pressing plate 72 is used to abut against the fourth positioning surface 233.

[0134] Optionally, the second pressing plate 72 is further provided with a connecting hole 721 , a positioning hole 722 and a seventh positioning portion 723 . For related descriptions, reference can be made to the aforementioned descriptions of the connecting hole 711 , the positioning hole 712 and the sixth positioning portion 713 .

[0135] In a possible embodiment, the second receiving portion 62 further includes a second positioning column protruding from the second bottom wall, and the second connecting portion 23 further includes a second positioning groove (i.e., the second positioning portion 231) recessed in the third positioning surface, and the second positioning groove is used to accommodate the second positioning column.

[0136] In one possible embodiment, the projection device further includes a second gasket 82, which is sandwiched between the second pressing plate 72 and the second connecting portion 23. Optionally, the second gasket 82 is made of an elastic material, such as a rubber strip, foam, silicone rubber, or other elastomeric material. In some embodiments of the present application, the hardness of the second pressing plate 72 is greater than that of the second gasket 82. Alternatively, the first gasket is an elastic structure, such as a metal spring, a non-metallic spring, or a spring structure. For related descriptions, please refer to the aforementioned description of the first gasket 81.

[0137] Optionally, an eighth positioning portion 821 is further provided on the second gasket 82 , and the eighth positioning portion is used to cooperate with the seventh positioning portion 723 .

[0138] In one possible embodiment, the outer contour of the curved mirror 2 is a rectangle, comprising a first long side, a second long side, a first short side, and a second short side. The first connecting portion and the second connecting portion are respectively disposed on the first short side and the second short side. The housing 6 also includes at least four sidewalls surrounding the curved mirror 2. The light source mounting portion 63 is located on the sidewall of the housing 6 adjacent to the long side of the curved mirror 2. This light source mounting portion is used to mount the light source unit 1.

[0139] The present application also provides a display device, which includes the aforementioned curved mirror 2 or the aforementioned projection device.

[0140] Please refer to Figure 14, which is a schematic diagram of the structure of a display device provided in an embodiment of the present application. Display device 10 includes a curved mirror 2, a housing 6, and a light source unit 1. The light source unit is used to generate imaging light, and the curved mirror 2 is used to reflect the imaging light out of the housing 6.

[0141] In some possible implementations, referring to FIG10 , the housing 6 may further include a curved mirror assembly opening 64 to facilitate assembly of the curved mirror 2. Optionally, the display device 10 further includes a back cover 101 that is fixedly connected to the housing 6 and covers the curved mirror assembly opening 64.

[0142] In some possible implementations, the display device further includes a transflective optical element 4 , which is configured to reflect the imaging light to the curved mirror 2 and transmit the imaging light from the curved mirror 2 out of the housing 6 .

[0143] Optionally, the transflective optical element 4 may also be replaced by an element such as a window.

[0144] In some possible implementations, the display device 10 further includes a front cover 102 , which is fixedly connected to the housing 6 and covers the transflective optical element 4 .

[0145] In some possible embodiments, referring to the figure, in the second direction, from the fourth edge 216 of the curved mirror 2 toward the third edge 215, the position of the light source unit 1 is higher than the position of the curved mirror 2 and the position of the transflective optical element 4 (as shown in Figures 3 and 10).

[0146] An embodiment of the present application further provides a seat, which includes the aforementioned curved mirror, projection device or display equipment.

[0147] The embodiment of the present application also provides a terminal, which includes the aforementioned curved mirror, projection device, display device or seat. It should be understood that the terminal involved in the present application may include intelligent terminals or vehicles such as vehicles, robots, drones, ships, and ships. Among them, the vehicle is a vehicle in a broad sense, which can be a vehicle (such as a commercial vehicle, a passenger car, a motorcycle, a flying car, a train, etc.), an industrial vehicle (such as a forklift, a trailer, a tractor, etc.), an engineering vehicle (such as an excavator, a bulldozer, a crane, etc.), an agricultural equipment (such as a mower, a harvester, etc.), etc. For another example, the robot can be an intelligent handling robot (automated guided vehicle, AGV), a walkable conversational robot, a service robot, and other robots.

[0148] In the description of this application, the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", "left", "side", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting this application. It should be understood that the Z direction, Y direction, etc. mentioned in some embodiments of this application are based on the XYZ rectangular coordinate system as a reference to facilitate the description of the features in this solution, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation.

[0149] In addition, in the embodiments of the present application, "back-to-back arrangement" refers to different orientations, and does not necessarily limit the orientations of the two parts to completely opposite directions. For example, the first surface and the second surface are arranged back to back, which means that the first surface and the second surface are oriented in substantially different directions in the first direction, such as one is approximately oriented in the positive direction of the X direction and the other is approximately oriented in the negative direction of the X direction. In some possible cases, the first surface and the second surface are parallel and arranged back to back, while in other cases, the first surface and the second surface may not be completely back to back, but may be inclined at a certain angle. Similarly, the first edge and the second edge are opposite to each other, the third edge and the fourth edge are opposite to each other, and so on. Similar situations exist.

[0150] In the embodiments of the present application, the "end" appearing in terms such as "one end", "the other end", and "the end" is not limited to the end head, endpoint, or end face, but also includes a portion extending an axial distance and / or radial distance from the end head, endpoint, or end face on the device or element to which the end head, endpoint, or end face belongs.

[0151] In the embodiments of this application, words such as "exemplarily" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplarily" or "for example" is intended to present the relevant concepts in a concrete manner.

[0152] The “at least one” mentioned in the embodiments of this application refers to one or more, and “plurality” refers to two or more. “At least one of the following items” or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can represent: a, b, c, (a and b), (a and c), (b and c), or (a and b and c), where a, b, c can be single or multiple. “And / or” describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character “ / ” generally indicates that the previous and next associated objects are in an “or” relationship.

[0153] Furthermore, unless otherwise indicated, ordinal numbers such as "first" and "second" in the embodiments of this application are used to distinguish multiple objects and are not used to define the order, timing, priority, or importance of multiple objects. For example, the terms "first connecting portion" and "second connecting portion" are merely used to facilitate the description of the fixing portion in different embodiments and do not indicate differences in their structure, importance, or arrangement order.

Claims

1. A curved mirror, characterized in that: include: A mirror body, a first connecting portion and a second connecting portion, wherein the first connecting portion and the second connecting portion are used to fix the curved mirror, The mirror body comprises a first surface, a second surface, a first edge and a second edge, the first surface is a curved surface, and the normal direction of the first surface is a first direction; The first surface and the second surface are disposed opposite to each other along a first direction, the first edge and the second edge are disposed opposite to each other along a second direction, and the first direction is perpendicular to the second direction; The first connection portion is protruded from the first edge, the second connection portion is protruded from the second edge, the length of the first connection portion along the third direction is shorter than the length of the first edge along the third direction, and the length of the second connection portion along the third direction is shorter than the length of the second edge along the third direction; The spacing between the central axis of the first connecting portion along the third direction and the central axis of the first edge along the third direction is less than 1 / 5 of the length of the first edge along the third direction, and the spacing between the central axis of the second connecting portion along the third direction and the central axis of the second edge along the third direction is less than 1 / 5 of the length of the second edge along the third direction. The third direction is perpendicular to the first direction, and the third direction is perpendicular to the second direction.

2. The curved mirror according to claim 1, characterized in that: The central axis of the first connecting portion along the third direction coincides with the central axis of the first edge along the third direction, and the central axis of the second connecting portion along the third direction coincides with the central axis of the second edge along the third direction.

3. The curved mirror according to claim 1 or 2, characterized in that: A ratio of a length of the first connection portion along the third direction to a length of the first edge along the third direction falls within [1 / 3, 1 / 2], and a ratio of a length of the second connection portion along the third direction to a length of the second edge along the third direction falls within [1 / 3, 1 / 2].

4. The curved mirror according to any one of claims 1 to 3, characterized in that: The outer contour of the mirror body is a rectangle, and the rectangle includes a first short side and a second short side, the first short side is the first edge, and the second short side is the second edge.

5. The curved mirror according to any one of claims 1 to 3, characterized in that: The outer contour of the mirror body is a rectangle, and the rectangle includes a first long side and a second long side, the first long side is the first edge, and the second long side is the second edge.

6. The curved mirror according to any one of claims 1 to 5, characterized in that: The first connecting portion includes a first positioning portion.

7. The curved mirror according to claim 6, characterized in that: The first positioning portion includes a first positioning groove, and the first positioning groove is used to accommodate a first positioning column.

8. The curved mirror according to claim 6 or 7, characterized in that: The second connecting portion includes a second positioning portion.

9. The curved mirror according to any one of claims 1 to 8, characterized in that: The first connecting portion includes a first positioning surface and a second positioning surface, and the first positioning surface and the second positioning surface are both planes and perpendicular to the first direction.

10. A projection device, characterized in that: The projection device comprises a housing and a curved mirror according to any one of claims 1 to 9, The housing includes a first receiving portion and a second receiving portion which are arranged on the housing, the first connecting portion is fixed to the first receiving portion, and the second connecting portion is fixed to the second receiving portion.

11. The projection device according to claim 10, characterized in that: The first connecting portion of the curved mirror includes a first positioning portion, and the housing further includes a third positioning portion, and the first positioning portion and the third positioning portion are assembled.

12. A display device, characterized in that: The display device comprises a light source unit, and the display device further comprises the projection device according to claim 10 or 11, The light source unit is mounted on a side wall of the housing of the projection device close to the long side of the curved mirror. The light source unit is used to generate imaging light. The mirror in the projection device is used to reflect the imaging light out of the housing.

13. A seat, characterized in that: The seat comprises the projection device according to claim 10 or 11, and the projection device is installed on the backrest, headrest or neck of the seat; Alternatively, the seat comprises the display device according to claim 12, and the display device is mounted on a seat back, a headrest or a neck of the seat.

14. A mobile terminal, characterized in that: The movable terminal includes the projection device according to claim 10 or 11, or includes the display device according to claim 12, or includes the seat according to claim 13.

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