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

Abstract

The invention discloses a curved mirror, a projection device, display equipment, a seat and a terminal, and is applied to the field of vehicle-mounted equipment. The curved mirror comprises a mirror body, a first connecting part and a second connecting part, and the first connecting part and the second connecting part are used for fixing 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, the normal direction of the first surface is a first direction, the first surface and the second surface are arranged back to back along the first direction, the first edge and the second edge are arranged back to back along the second direction, and the first direction is different from the second direction. The first connecting part is convexly arranged on the first edge, and the second connecting part is convexly arranged on the second edge. According to the curved mirror, the first connecting part and the second connecting part are arranged in the middle of the two opposite edges, so that the curved surface is stressed more uniformly and regularly, the surface shape of the curved surface is stable, the assembling stability and the assembling precision of the curved mirror can be improved, the possibility of irregular deformation of the curved mirror is reduced, and the use experience of a user is improved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle-mounted devices, and particularly to a curved mirror, a projection device, a display device, a seat and a terminal. Background Art

[0002] An optical display device refers to a type of device that uses the principle of optical imaging to obtain a large-screen visual experience in a small space, and it can be widely applied to projectors, head-up displays (HUDs), vehicle-mounted displays, vehicle lamps, etc. A curved mirror is often required in an optical display device to reflect light beams and produce a converging or diverging effect. With the wide application of optical display devices, the installation structure of the curved mirror therein has also attracted attention.

[0003] Currently, most installations of curved mirrors adopt an adhesive bonding solution. The curved mirror is bonded to the bottom shell through glue or double-sided adhesive foam, etc., and then fixed by a surrounding frame around it. On the one hand, the material of the curved mirror is usually different from that of the bottom shell, and when heated, it is easy to cause a deformation difference between the two due to different thermal expansion coefficients, thereby affecting the bonding strength between the curved mirror and the surrounding frame and reducing the setting stability of the curved mirror. On the other hand, since the bonding layer is usually a flexible material, when the optical display device is installed on a mobile terminal, the bonding installation method may cause the curved mirror to shake due to the bumps and vibrations of the mobile terminal, resulting in the corresponding jumping of the picture and affecting the user experience.

[0004] How to improve the installation stability of the curved mirror and enhance the user experience of using the optical display device is a hot issue being studied by those skilled in the art. Summary of the Invention

[0005] The present application provides a curved mirror, a projection device, a display device, a seat and a terminal, which can improve the assembly firmness and assembly accuracy of the curved mirror, reduce the possibility of irregular deformation of the curved mirror, and enhance the user experience.

[0006] In a first aspect, the present application provides a curved mirror, including a mirror body, a first connection portion and a second connection portion, and the first connection portion and the second connection portion are used to fix the curved mirror.

[0007] The mirror body includes a first surface, a second surface, a first edge and a second edge. Among them, the first surface is a curved surface, and the normal direction of the first surface is the first direction. The first surface and the second surface are arranged opposite to each other along the first direction, the first edge and the second edge are arranged opposite to each other along the second direction, and the first direction is different from the second direction. Optionally, the first direction is perpendicular to the second direction.

[0008] Among them, the first connecting part protrudes from the first edge, and the second connecting part protrudes from the second edge. Among them, the first connecting part is generally arranged in the middle part of the first edge, and the second connecting part is generally arranged in the middle part of the second edge. Exemplarily, the first connecting part passes through the midpoint of the first edge, and / or the second connecting part passes through the midpoint of the second edge.

[0009] Optionally, the first connecting part is generally arranged in the middle part of the first edge, including: the distance between the central axis of the first connecting part in the third direction and the central axis of the first edge in the third direction is less than 1 / 5 of the length of the first edge in the third direction. The second connecting part is generally arranged in the middle part of the second edge, including: the distance between the central axis of the second connecting part in the third direction and the central axis of the second edge in the third direction is less than 1 / 5 of the length of the second edge in the third direction. 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 the third direction is perpendicular to the second direction.

[0010] In this application, the curved mirror is fixed by two connecting parts arranged on the first edge and the second edge, which can avoid the risks of jitter and falling off caused by the bonding method, improve the assembly stability and assembly accuracy of the curved mirror, improve the accuracy and stability of the optical 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, this application realizes the fixation of the curved mirror through two connecting parts. The curved mirror can be fixed by connecting with the connecting parts. This not only reduces the steps such as injecting glue and pasting in the bonding process, but also the number of connecting parts is small, which is easy to install and reduces the assembly steps of the curved mirror.

[0011] Furthermore, the first connecting part and the second connecting part are arranged in the middle parts of two opposite edges. After the curved mirror is fixed, the forces on each part of the curved surface are more uniform and regular, and the surface shape of the curved surface is stable. Exemplarily, when forces such as pre-tightening force, gravity, and stress generated by thermal expansion act together, the force conditions of each part of the curved surface are relatively regular, reducing the possibility of irregular deformation of the curved mirror, thereby avoiding the distortion of the light spot passing through the curved mirror and improving the user experience.

[0012] Furthermore, the mirror body also includes other edges, such as the third edge and the fourth edge, and no connecting parts are provided on the other edges. It can be understood that when connecting parts are provided on the edges, corresponding spaces for accommodating the protruding connecting parts need to be provided on the housing or the mounting structure. Therefore, if connections are provided on multiple edges, it will greatly increase the occupied space of the housing or the mounting structure, which is not conducive to the development of high screen ratios. In this application, connecting parts are only provided on the first edge and the second edge, making the thickness of the part of the housing or the mounting structure that is connected to the other edges smaller, which is conducive to the development of high screen ratios, has a more beautiful shape, and improves the user experience.

[0013] In some scenarios, the first connecting portion, the second connecting portion, and the mirror body are integrally connected. At this time, the curved mirror can be a device formed integrally, further improving the stability. Optionally, the curved mirror can be a product formed integrally by integral casting.

[0014] Considering some possible situations, when the connecting portion is arranged at the corner of the edge, the injection molding process of the product is likely to be affected by the space formed by the connecting portion at the corner, resulting in a wavy pattern, making the surface of the curved mirror uneven. In this application, the connecting portion is arranged in the middle of the edge, and the injection molding can flow evenly during the product forming process, which can reduce the possibility of the curved mirror forming a wavy pattern. After molding, the surface of the product has a high flatness, thereby optimizing the optical effect on the surface, avoiding distortion of the light spot passing through the curved mirror, and improving the user experience.

[0015] Optionally, the second surface is also a curved surface. Among them, the curved surface can be one or more of a spherical surface, an aspherical surface, a free surface, etc. Among them, the aspherical surface generally refers to a quadratic surface such as a paraboloid, an ellipsoid, an involute surface, a hyperboloid, etc. with a rotation axis, as well as a higher-order surface, and a non-rotating aspherical surface, such as an off-axis aspherical surface, etc. The free surface is an optical structure with a more complex surface shape, where the radius of curvature of each point on the surface is different, and the degree of freedom of the surface shape is very high. The optical free surface has a complex surface shape and a high degree of freedom, and there is no clear expression definition. Generally, it is considered that an optical surface that does not have global rotational symmetry, has no unified optical axis, and has multiple radii of curvature on the entire surface is an optical free surface.

[0016] Exemplarily, the first surface and the second surface can be free surfaces, and the radius of curvature of each point on the surface can be different. Further, the first surface and the second surface can be different free surfaces.

[0017] It should be noted that in the embodiments of this application, being arranged back to back means that the facing directions are different, and it does not necessarily limit that the two parts must be 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 face in generally different directions in the first direction. For example, one generally faces the positive direction of the X direction and the other generally faces the negative direction of the X direction. In some possible situations, the first surface and the second surface are parallel and arranged back to back, and in some other situations, the first surface and the second surface may not be completely back to back, but there is a certain inclination angle. Similarly, the first edge and the second edge are back to back, and the third edge and the fourth edge are back to back, etc. have similar situations.

[0018] In a possible implementation manner of the first aspect, the connecting portion can fix the curved mirror in the first direction, the second direction, and the third direction.

[0019] Exemplarily, on the one hand, when installed, the protruding connecting portion can be clamped in the third direction and the second direction, so as to prevent the curved mirror from generating large displacements in the third direction and the second direction. On the other hand, the edge of the connecting portion away from the convex portion can also abut against the housing or the mounting structure. On the other hand, when installed, the protruding connecting portion can be pressed in the normal direction perpendicular to the first surface, so as to prevent displacement in the normal direction of the first surface and prevent the curved mirror from rotating around the second direction. In short, the first connecting portion and the second connecting portion designed in the present application can improve the stability and assembly accuracy of the curved mirror. Especially when the curved mirror is arranged in an environment where bumps and vibrations often occur, such as in a mobile terminal, it can have good anti-shake characteristics, avoid discomfort such as dizziness for users when viewing the picture generated through the curved mirror, and improve the user experience.

[0020] In another possible implementation manner 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. In this way, the installation stability of the curved mirror can be further enhanced, the surface shape stability of the curved surface can be improved, the force conditions of each part of the curved surface are more regular, and the possibility of the curved mirror generating irregular deformation is further reduced.

[0021] In another possible implementation manner of the first aspect, the length of the first connecting portion along the third direction is less than the length of the first edge along the third direction, and the length of the second connecting portion along the third direction is less than the length of the second edge along the third direction.

[0022] In the above implementation manner, the length of the connecting portion is less than the length of the edge where it is provided. On the one hand, the surface difference of the curved surface spanned by the connecting portion is reduced, so that the curved surface of the mirror body and the surface of the connecting portion in the first direction have a smooth transition, 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 housing accommodating the curved surface can correspondingly reduce the space for accommodating the connecting portion, which is beneficial to the miniaturization trend of the display device.

[0023] In another possible implementation manner of the first aspect, 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 [1 / 4, 1 / 2]. Further, 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 [1 / 4, 1 / 2].

[0024] Further, the ratio of the length of the first connecting portion in the third direction to the length of the first edge in the third direction falls within [1 / 3, 1 / 2]. Further, the ratio of the length of the second connecting portion in the third direction to the length of the second edge in the third direction falls within [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.

[0025] In another possible implementation manner of the first aspect, the outer contour of the mirror body is rectangular, 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.

[0026] In the above implementation manner, the two protruding connecting portions are arranged on the short sides, which can reduce the thickness of the housing on the long sides, contribute to the development of a high screen-to-body ratio, have a more beautiful shape, and improve the user experience. Considering some possible situations, when the light beam reflected by the curved mirror is a landscape screen image, reducing the thickness of the housing on the long sides can solve problems such as the "wide chin" and "thick" forehead of the optical display device, and the shape is more concise and beautiful. Moreover, when the aspect ratio of the mirror body is relatively large, such as greater than 1.5, greater than 1.7, etc., arranging the connecting portions on the short sides and combining with the curved surface can effectively reduce the swing arm effect and improve the assembly stability of the curved mirror.

[0027] In another possible implementation manner of the first aspect, the outer contour of the mirror body is rectangular, 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.

[0028] Considering some possible situations, when the light beam reflected by the curved mirror is a portrait screen image, reducing the thickness of the housing on the short sides can solve problems such as the "wide chin" and "thick" forehead of the optical display device, and the shape is more concise and beautiful.

[0029] In another possible implementation manner of the first aspect, the first connecting portion includes a first positioning portion. On the housing or connecting structure for installing the curved mirror, a third positioning portion can be correspondingly provided to cooperate with the first positioning portion. The above implementation manner can achieve the positioning of the connecting portion, and at the same time can also limit the rotation of the curved mirror relative to the housing (or mounting structure), improve the position stability of the curved mirror relative to the housing, and thus improve the quality of the output light beam.

[0030] Exemplarily, the first positioning portion includes a first positioning groove for accommodating a first positioning post. Optionally, the positioning post can be a pin or the like. Exemplarily, the first positioning portion includes a first positioning hole that penetrates the first connecting portion in the thickness direction of the first connecting portion. The first positioning hole is used for passing through a first positioning post. Optionally, the positioning post can be a pin or a fastener such as a screw.

[0031] In yet 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. Further exemplarily, the second positioning portion includes a second positioning hole.

[0032] In yet another possible implementation of the first aspect, the first connecting portion includes a first positioning surface and a second positioning surface, both the first positioning surface and the second positioning surface are flat surfaces and perpendicular to the first direction.

[0033] In the above implementation, the positioning surface realizes the positioning of the connecting portion, and the stability of the surface contact is stronger. At the same time, it can also limit the rotation of the curved mirror relative to the housing (or the mounting structure), improving the position stability of the curved mirror relative to the housing, and thus improving the quality of the output light beam.

[0034] Optionally, the first connecting portion includes a first positioning groove recessed in the first positioning surface.

[0035] In yet another possible implementation of the first aspect, the second connecting portion includes a third positioning surface and a fourth positioning surface, both the third positioning surface and the fourth positioning surface are flat surfaces and perpendicular to the first direction. Optionally, the second connecting portion includes a second positioning groove recessed in the third positioning surface.

[0036] In a second aspect, the present application provides a projection device. The projection device includes a housing and the curved mirror described in any one of the first aspects. The housing includes a first receiving portion and a second receiving portion provided 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.

[0037] In yet another possible implementation of the second aspect, the projection device further includes a first pressing piece and a second pressing piece. The first connecting portion of the curved mirror is received in the first receiving portion, and the first pressing piece is used to press the first connecting portion in the first receiving portion. The second connecting portion of the curved mirror is received in the second receiving portion, and the second pressing piece is used to press the second connecting portion in the second receiving portion.

[0038] In yet another possible implementation of the second aspect, the first receiving 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 piece is used to abut against the second positioning surface.

[0039] In yet another possible implementation of the second aspect, the first receiving portion further includes a first positioning post protruding from the first bottom wall. The first connecting portion further includes a first positioning groove recessed in the first positioning surface, and the first positioning groove is used to receive the first positioning post.

[0040] In a possible implementation of the second aspect, the projection device further includes a first gasket, and the first gasket is disposed between the first pressing piece and the first connecting portion. Optionally, the first gasket is made of an elastic material, or the first gasket is an elastic structure, such as a metal shrapnel, a non-metal shrapnel, or a spring structure, etc.

[0041] In another possible implementation of the second aspect, the second receiving portion includes a second bottom wall, and the second connecting portion includes a third positioning surface and a fourth positioning surface 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 piece is used to abut against the fourth positioning surface.

[0042] In another possible implementation of the second aspect, the second receiving portion further includes a second positioning post protruding from the second bottom wall, and the second connecting portion further includes a second positioning groove recessed in the third positioning surface. The second positioning groove is used to accommodate the second positioning post.

[0043] In another possible implementation of the second aspect, the projection device further includes a second gasket, and the second gasket is disposed between the second pressing piece and the second connecting portion. Optionally, the second gasket is made of an elastic material, or the second gasket is an elastic structure, such as a metal shrapnel, a non-metal shrapnel, or a spring structure, etc.

[0044] In another possible implementation of the second aspect, the outer contour of the curved mirror is rectangular. 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 disposed on the first short side and the second short side. The housing further includes a side wall surrounding the curved mirror, and the light source mounting portion is on the side wall of the housing close to the long side of the curved mirror.

[0045] In a third aspect, the present application further provides a display device. The display device includes a light source unit. The display device further includes the projection device described in any one of the second aspect. The light source unit is mounted on the 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, and the lens body in the projection device is used to reflect the imaging light outside the housing.

[0046] In a fourth aspect, the present application further provides a seat. The seat includes the projection device described in any one of the second aspect. The projection device is mounted on the backrest, the headrest, or the neck of the seat.

[0047] In a fifth aspect, the present application further provides a seat. The seat includes the display device described in the third aspect. The display device is mounted on the backrest, the headrest, or the neck of the seat.

[0048] In a sixth aspect, the present application further 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.

[0049] Optionally, the terminal is a mobile terminal, for example, having a traveling system, such as one or more of rollers, chains, engines, or power batteries. Description of the Drawings

[0050] Figure 1 is a schematic structural diagram of a vehicle;

[0051] Figure 2 is a schematic imaging diagram of a display device;

[0052] Figure 3 is a schematic imaging diagram of another display device;

[0053] Figure 4 is a schematic structural diagram of a curved mirror provided by an embodiment of the present application;

[0054] Figure 5 is a schematic axis diagram of a curved mirror provided by an embodiment of the present application;

[0055] Figure 6 is a schematic comparison diagram of the position where a connecting portion is provided in an embodiment of the present application;

[0056] Figure 7 is a schematic fixing effect diagram of a connecting portion provided by an embodiment of the present application;

[0057] Figure 8 is a schematic fixing effect diagram of another connecting portion provided by an embodiment of the present application;

[0058] Figure 9 is a schematic outer contour diagram of a connecting portion provided by an embodiment of the present application;

[0059] Figure 10 is an exploded schematic diagram of a projection device provided by an embodiment of the present application;

[0060] Figure 11 is a schematic overall structure diagram of a projection device provided by an embodiment of the present application;

[0061] Figure 12 is a schematic partial structure diagram of a projection device provided by an embodiment of the present application;

[0062] Figure 13 is Figure 12 a schematic sectional structure diagram of the partial structure shown along line A-A;

[0063] Figure 14 It is a schematic structural diagram of a display device provided by an embodiment of the present application. Specific embodiments

[0064] In recent years, more and more optical display devices have been integrated into terminals, such as projectors, head-up displays (HUDs), in-vehicle display screens (such as light field screens), or vehicle headlights. Taking the optical display device in a vehicle as an example, the in-vehicle optical display device can project image light onto the windshield, curtain, in front of the vehicle, outside the car door, etc., or present a large-screen image in front of the eyes of the occupant using a virtual image, comprehensively enhancing the performance and riding experience of the vehicle.

[0065] Please refer to Figure 1 , Figure 1 It is a schematic structural diagram of a vehicle. A display device 10 is provided in the vehicle 100, and the installation position of the display device 10 can be on the instrument panel (IP) of the vehicle, or on the seat of the vehicle 100. Among them, the seat can include multiple rows, for example, including a front row seat 20 arranged relatively in the front and a rear row seat 30 arranged relatively in the rear.

[0066] Please refer to in combination Figure 1 and Figure 2 , Figure 2 It is a schematic diagram of the imaging principle of a display device. Taking the display device 10 installed in front of the driver's seat on the IP 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, and the imaging light is reflected by the optical element 3 and the curved mirror 2 and projected onto the windshield 40 (or the curtain on 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 lowering his head, such as the state of the vehicle itself (such as speed, fuel level, battery level, engine speed, or driving distance), obstacles, the distance of obstacles, road regulations (such as speed limit information, distance to the camera position), route information, danger warning information, etc., improving the driver's driving experience and driving safety. Optionally, the optical element 3 can be a reflector.

[0067] Please refer to in combination Figure 1 and Figure 3 , Figure 3It is the imaging principle diagram of another display device. Taking the display device 10 installed in front of the co-pilot seat of the IP station and the display device installed in the front row seat 20 as examples, the display device 10 may include a light source unit 1, a curved mirror 2, and a transmissive-reflective optical element 4. The light source unit 1 can generate imaging light. The imaging light is reflected by the transmissive-reflective optical element 3, reflected by the curved mirror 2, and then passes through the transmissive-reflective optical element 4 to reach the human eye. The human eye receives the imaging light and forms a virtual image at a certain distance in front of the human eye, thereby breaking through the space limitation of the vehicle cockpit and enabling the occupant to have a large-screen viewing experience.

[0068] It can be seen that a curved mirror is often provided in an optical display device to reflect imaging light. The stable installation of the curved mirror is beneficial to improving the output quality of the imaging light and enhancing the user experience.

[0069] 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.

[0070] First, the curved mirror provided by the embodiment of the present application will be introduced below.

[0071] The embodiment of the present application provides a curved mirror 2. The curved mirror 2 is an optical element with a curved reflecting surface. Among them, the curved surface can be a spherical surface, an aspherical surface, or a free-form surface, etc. Among them, an aspherical surface generally refers to a quadratic surface such as a paraboloid, an ellipsoid, an involute surface, a hyperboloid, etc. with a rotation axis, as well as a higher-order surface, and a non-rotational aspherical surface, such as an off-axis aspherical surface, etc. A free-form surface is an optical structure with a more complex surface shape, where the radius of curvature of each point on the surface is different, and the degree of freedom of the surface shape is very high. The surface shape structure of the free-form surface is complex and has a high degree of freedom. There is no clear expression definition. Generally, it is considered 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.

[0072] In some possible implementation manners, the curved mirror 2 is a reflecting mirror with a free-form surface. The free-form surface can not only replace multiple aspherical surfaces to correct aberration, but also maximize the optical quality and streamline the optical structure. In some other possible implementation manners, the curved mirror 2 is a spherical reflecting mirror or an aspherical reflecting mirror.

[0073] Please refer to Figure 4 , Figure 4 which is a schematic structural diagram of a curved mirror provided by the 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 fix 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 installation position of the curved mirror 2 and preventing the curved mirror 2 from moving and / or rotating.

[0074] Among them, the mirror body 21 includes a first surface 211, a second surface 212, a first edge 213 and a second edge 214. Among them, the first surface 211 is a curved surface, such as a spherical surface, an aspherical curved surface, or a free-form surface, etc. The normal direction of the first surface 211 is the first direction. For example, in Figure 4 the coordinate system shown, the normal direction of the first surface 211 is the Z direction. The first surface 211 and the second surface 212 are arranged back to back along the first direction, and the first edge 213 and the second edge 214 are arranged back to back along the second direction (such as Figure 4 the X direction shown), and the first direction is different from the second direction.

[0075] Among them, the first connecting portion 22 protrudes from the first edge 213, and the second connecting portion 23 protrudes from the second edge 214. Please refer to Figure 5 , since the first connecting portion and the second connecting portion protrude and are arranged on the edge, the length d of the first connecting portion along the third direction (such as Figure 4 the Y direction shown) 1 is less than the length d of the first edge along the third direction 3 , the length d of the second connecting portion along the third direction 2 is less than the length d of the second edge along the third direction 4 , the third direction is different from the first direction, and the third direction is different from the second direction. Further, the third direction is perpendicular to the first direction, and the third direction is perpendicular to the second direction.

[0076] In the embodiment of the present application, the first connecting portion 22 is generally arranged in the middle part of the first edge 213, and the second connecting portion 23 is generally arranged in 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 generally passes through the midpoint of the second edge 214. In the present application, the curved mirror 2 is fixed by two connecting portions provided on 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 optical path formed by the curved mirror, and can significantly improve the output quality of the light beam. Moreover, in the present application, the curved mirror 2 is fixed by two connecting portions. The curved mirror can be fixed by connecting with the connecting portions, and the number of connecting portions is also small, which is easy to install and reduces the assembly steps of the curved mirror 2.

[0077] In one possible implementation, the first direction is perpendicular to the second direction. In other implementations, the first direction is different from the second direction but not perpendicular to each other. It is understandable that the perpendicularity between the first direction and the second direction is for better explaining 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 precision, measurement errors, additional components being installed, etc., one or more of the first edge 213, the second edge 214, the first surface 211, and the second surface 212 have other designs in terms of dimensions, shapes, etc., resulting in the non-perpendicularity between the first direction and the second direction.

[0078] 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 do not meet.

[0079] Furthermore, the first connecting portion 22 and the second connecting portion 23 are arranged in the middle parts of two opposite edges. After the curved mirror 2 is fixed, each part of the mirror body 21 is more evenly and regularly stressed, and the surface shape of the curved surface is stable. Refer to Figure 4 It can be seen that the curved surface can form a symmetric structure, and the middle part of the edge is subjected to a pre-tightening force during fixation, and the action of the pre-tightening force is also relatively regular, making the deformation of the surface shape of the curved surface relatively regular. The stress generated by thermal expansion basically reaches the maximum at the connecting portions on both sides, and the deformation generated by the stress is also relatively regular. In short, when forces such as the pre-tightening force, gravity, and stress generated by thermal expansion act together, the stress conditions of each part of the curved surface are relatively regular. For example, the forces on the left and right sides are basically symmetric, and such regular stress reduces the possibility of irregular deformation of the curved mirror, thereby avoiding the distortion of the light spot passing through the curved mirror and improving the user experience.

[0080] Furthermore, the mirror body further includes other edges, such as the third edge 215 and the fourth edge 216, and no connecting portion is provided on the other edges. It is understandable that when a connecting portion is provided on an edge, the housing or the mounting structure needs to correspondingly provide a space for accommodating the protruding connecting portion. Therefore, if connecting portions are provided on multiple edges, it will greatly increase the occupied space of the housing or the mounting structure, which is not conducive to the development of a high screen-to-body ratio. In the embodiment of the present application, connecting portions are only provided on the first edge 213 and the second edge 214, making the thickness of the part of the housing or the mounting structure that is in contact with the other edges smaller, which is conducive to the development of a high screen-to-body ratio, has a more beautiful shape, and improves the user experience.

[0081] As some possible implementations, the first connecting portion 22, the second connecting portion 23, and the mirror body 21 are integrally connected. At this time, the curved mirror can be a device formed by one-piece molding, further improving the stability. Optionally, the curved mirror can be a product integrally formed by integral casting.

[0082] Considering some possible situations, when the connecting part is set at the corner, the injection molding process of the product is likely to affect the flow path due to the space of the connecting part at the corner, resulting in wavy lines and making the surface of the curved mirror uneven. In this application, the connecting part is set in the middle of the edge. During the product molding process, the injection can flow evenly, and the surface shape of the product after molding fluctuates little. Moreover, the possibility of the curved mirror forming wavy lines can be reduced, effectively optimizing the surface optical effect, thereby avoiding the distortion of the light spot passing through the curved mirror and improving the user experience.

[0083] Optionally, the second surface 212 is also a curved surface. Among them, the curved surface can be one or more of a spherical surface, an aspherical surface, or a free-form surface, etc. Exemplarily, the first surface 211 and the second surface 212 can be free-form surfaces, and the radius of curvature of each point on the surface can be different. Further, the first surface 211 and the second surface 212 can be different free-form surfaces.

[0084] As a possible implementation, the central axis of the first connecting part 22 along the third direction (for example Figure 4 the Y direction shown) has a relatively small interval from the central axis of the first edge 213 along the third direction, for example, less than 1 / 5 of the length of the first edge 213 along the third direction. Since the interval between the central axes is relatively small, the setting position of the first connecting part 22 falls near the central axis of the first edge 213, that is, in the middle part of the first edge 213. In some embodiments, there are intervals between the two edges of the first connecting part 22 along the third direction and the two ends of the first edge in the third direction. In other words, combined with Figure 4 , the first connecting part 22 is not connected to the third edge 215 and the fourth edge 216.

[0085] As another possible implementation, the central axis of the second connecting part 23 along the third direction has a relatively small interval from the central axis of the second edge 214 along the third direction, for example, less than 1 / 5 of the length of the second edge 214 along the third direction. In some embodiments, there are intervals between the two edges of the first connecting part 22 along the third direction and the two ends of the first edge in the third direction. In other words, combined with Figure 4 , the first connecting part 22 is not connected to the third edge 215 and the fourth edge 216.

[0086] Please refer to Figure 5 , taking the left-right symmetry of the curved mirror 2 as an example. Along the third direction (i.e., the Y direction), the central axes 24 of the first edge 213 and the second edge 214 have a relatively small interval from the central axes 25 of the first connecting part 22 and the second connecting part 23. Exemplarily, in the Y direction, the length of the first edge 213 is d 3, the distance between the central axis 25 of the first connecting portion 22 and the central axis 24 of the first edge 213 is y 2 , Similarly, the length of the second edge 214 is d 4 , the distance between the central axis 25 of the second connecting portion 23 and the central axis 24 of the second edge 214 is y 1 ,

[0087] In some possible implementation manners, one or more of the length, shape, included structure, position on the set edge, etc. of the first connecting portion and the second connecting portion may be the same. In some other possible implementation manners, one or more of the length, shape, included structure, position on the set edge, etc. of the first connecting portion and the second connecting portion are different. Exemplarily, in the Y direction, the lengths of the first connecting portion 22 and the second connecting portion 23 may be the same, but the distance between the first connecting portion 22 and the third edge 215 and the distance between the second connecting portion 23 and the third edge 215 may be different. For example, taking Figure 5 as an example, the first connecting portion 22 may be closer to the third edge 215 than the second connecting portion 23

[0088] In some possible implementation manners, the central axis of the first connecting portion in the third direction coincides with the central axis of the first edge in the third direction, and the central axis of the second connecting portion in the third direction coincides with the central axis of the second edge in the third direction. In this way, the installation stability of the curved mirror can be further enhanced, the surface shape stability of the curved surface can be improved, the force conditions of each part of the curved surface are more regular, and the possibility of irregular deformation of the curved mirror is further reduced

[0089] Since the projection of the curved mirror in the ZY plane is a curve, when the connecting portion (represented by the shaded part) is set in the middle, the surface difference in the Z direction it spans is smaller. Correspondingly, when it is set at a position far from the center, the surface difference it spans is larger. And when the surface difference is smaller, it is more conducive to maintaining the installation stability of the curved mirror and maintaining the uniform change of the surface shape of the curved mirror when it is stressed. Please refer to Figure 6 , Figure 6 which is a comparison schematic diagram of the setting positions of the connecting portions. Taking the length of the connecting portion in the Y direction as d, when the connecting portion is set in the middle position, its surface difference can be expressed as z 1 . And when the connecting portion is set at the edge, the surface difference it spans can be expressed as z 2 . It can be seen that at the same length d, z 1 <z 2 . Therefore, it can be seen that when the connecting portion is set in the middle position, it is beneficial to the surface shape stability of the curved surface

[0090] In some scenarios, the position of the discharging opening of the pouring can be set near the central axis of the third edge 215 in the second direction (i.e., the X direction), so that the material can diffuse and flow around. At this time, when the difference in height between the connecting part and the mirror surface is small, the transition from the curved surface to the connecting part is smoother (as Figure 13 shown, the transition between the second surface 212 and the second positioning surface 223 of the first connecting part 22 is smooth), further reducing the possibility of generating wavy lines during pouring and improving the surface smoothness of the curved mirror.

[0091] In some possible implementation manners, the connecting part can fix the curved mirror in the first direction, the second direction and the third direction.

[0092] The following combines Figure 7 and Figure 8 to introduce an exemplary schematic diagram of the fixing effect of the connecting part. As Figure 7 shown, when the protruding first connecting part 22 and the second connecting part 23 are installed, by arranging structural members on the outside of the protrusions, such as Figure 7 the structural members 511, the structural members 512, the structural members 513 and the structural members 514 shown, the first connecting part 22 and the second connecting part 23 can be clamped in the third direction (as Figure 7 shown in the Y direction) and the second direction (as Figure 7 shown in the X direction), so as to prevent the curved mirror from having a large displacement in the third direction and the second direction.

[0093] Exemplarily, when the curved mirror 2 moves in the positive X-axis direction as Figure 7 shown, the second edge 214 can abut against the structural members 513 and the structural members 513, so as to prevent it from having a large displacement. Similarly, when the curved mirror 2 moves in the negative X-axis direction as Figure 7 shown, the first edge 213 can be resisted by the structural members 511 and the structural members 512. Exemplarily, when the curved mirror 2 moves in the positive Y-axis direction as Figure 7 shown, the first connecting part 22 and the second connecting part 23 respectively abut against the structural members 513 and the structural members 511, so as to prevent it from having a large displacement, so as to prevent it from having a large displacement. Similarly, when the curved mirror 2 moves in the negative Y-axis direction as Figure 7 shown, the first connecting part 22 and the second connecting part 23 respectively abut against the structural members 514 and the structural members 512. It should be understood that the foregoing structural members 511 to 512 are only for facilitating the description of the positional relationship, and in specific implementation, some structural members can be integrally arranged. For example, as Figure 10 shown below, the structural members 511, the structural members 512, the structural members 513 and the structural members 514 can be a part of the housing 6.

[0094] The above Figure 7The positioning method shown is only an example. In the specific implementation process, the positioning in the second direction and / or the third direction can be controlled by other means. For example, there may be a gap between the first edge 213 and the second edge 214 and the structural member, and the displacement in the X direction can be controlled by abutting the first connecting portion 22 and the second connecting portion 23 against the housing or the mounting structure away from the protruding edge. For another example, the positioning in the second direction and / or the third direction is achieved by providing positioning portions on the first connecting portion 22 and the second connecting portion 23 (which will be introduced below).

[0095] As Figure 8 shown, when the protruding first connecting portion 22 and the second connecting portion 23 are installed, they can be pressed in the normal direction perpendicular to the first surface, for example, pressed by the structural members 515 and 516 on both sides, so as to avoid displacement in the normal direction of the first surface and prevent the curved mirror 2 from rotating around the second direction (such as Figure 8 the X direction shown).

[0096] 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. Especially when the curved mirror 2 is arranged in an environment where bumps and vibrations often occur, such as in a mobile terminal, it can have good anti-shake characteristics, avoiding discomfort such as dizziness for users when viewing the picture passing through the curved mirror, and improving the user experience.

[0097] In some possible implementation manners, the ratio of the length of the first connecting portion in the third direction to the length of the first edge in the third direction falls within [1 / 4, 1 / 2]. Similarly, the ratio of the length of the second connecting portion in the third direction to the length of the second edge in the third direction falls within [1 / 4, 1 / 2].

[0098] Furthermore, the ratio of the length of the first connecting portion in the third direction to the length of the first edge in the third direction falls within [1 / 3, 1 / 2]. Furthermore, the ratio of the length of the second connecting portion in the third direction to the length of the second edge in the third direction falls within [1 / 3, 1 / 2]. In this way, 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, and the installation stability of the curved mirror can be enhanced.

[0099] Exemplarily, the ratio of the length of the first connecting portion 22 in the third direction to the length of the first edge 213 in the third direction is 1 / 3. The curved mirror has stability when fixed, and the transition between the surface of the first connecting portion in the first direction and the curved surface of the curved mirror is also relatively smooth, improving the installation stability of the curved surface and ensuring the surface shape stability of the curved mirror. Similarly, the ratio of the length of the second connecting portion 23 in the third direction to the length of the second edge 214 in the third direction can also be 1 / 3.

[0100] In some possible embodiments, the outer contour of the mirror body 21 is rectangular, the rectangle includes a first short side and a second short side, the first short side is the first edge 213, and the second short side is the second edge 214. Combining Figure 7 As shown, the outer contour of the mirror body 21 is rectangular, where 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 housing on the long side can be reduced, which is beneficial to the development of a high screen-to-body ratio, the shape is more beautiful, and the user experience is improved. Considering some possible situations, when the light beam reflected by the curved mirror is a landscape screen, reducing the thickness of the housing on the long side can solve problems such as the "wide chin" and "thick" forehead of the optical display device, and the shape is more concise and beautiful.

[0101] In some possible cases, when the aspect ratio of the mirror body 21 is relatively large, such as greater than 1.5, greater than 1.7, etc., setting the connecting part on the short side and combining with the curved surface can effectively reduce the swing arm effect and improve the assembly stability of the curved mirror.

[0102] In some possible embodiments, the outer contour of the mirror body 21 is rectangular, the rectangle includes a first long side and a second long side, the first long side is the first edge 213, and the second long side is the second edge 214. Combining Figure 9 As shown, 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.

[0103] Considering some possible situations, when the light beam reflected by the curved mirror is a portrait screen, reducing the thickness of the housing on the short side can solve problems such as the "wide chin" and "thick" forehead of the optical display device, and the shape is more concise and beautiful.

[0104] In some possible embodiments, the first connecting part 22 includes a first positioning part 221. On the housing or connecting structure for installing the curved mirror 2, a third positioning part can be correspondingly arranged to cooperate with the first positioning part 221. Through the first positioning part 221, the positioning of the first connecting part 22 can be realized, and at the same time, the rotation of the curved mirror relative to the housing (or mounting structure) can be restricted, improving the position stability of the curved mirror relative to the housing, and further improving the quality of the output light beam.

[0105] Combined with reference to Figure 4 、 Figure 7 and Figure 9 , the first positioning part 221 is a first positioning groove, and the first positioning groove is used to accommodate the first positioning post. Optionally, the positioning post can be a pin or the like.

[0106] Exemplarily again, the first positioning part 221 is a first positioning hole, and the first positioning hole is along the thickness direction of the first connecting part (for exampleFigure 7 The first locating hole is used to penetrate the first locating column. Optionally, the locating column can be a pin, or a fastener such as a screw.

[0107] Similarly, the second connection 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.

[0108] In some possible implementations, the first connection portion 22 includes a first positioning surface 222 and a second positioning surface 223. Figure 4 , Figure 7 and Figure 9 The first positioning surface 222 and the second positioning surface 223 are disposed opposite to each other along the normal direction of the first surface, that is, the first direction (Z direction). Exemplarily, the first positioning surface 222 and the second positioning surface 223 are both planes and perpendicular to the first direction.

[0109] 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 further improving the quality of the output light beam.

[0110] Optionally, the first connecting portion 22 includes a first positioning groove recessed in the first positioning surface 222 .

[0111] In some possible implementations, the second connection portion 23 includes a third positioning surface 232 and a fourth positioning surface 233. Figure 4 and Figure 7 The third positioning surface 232 and the fourth positioning surface 233 are disposed opposite to each other along the normal direction of the first surface, that is, the first direction (Z direction). Exemplarily, the third positioning surface 232 and the fourth positioning surface 233 are both planes and perpendicular to the first direction.

[0112] Optionally, the second connection portion 23 includes a second positioning groove recessed in the third positioning surface 232 .

[0113] 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, and the reflective surface may be located on the first surface 211 or the second surface 212 .

[0114] It should be understood that Figure 4 In the first edge and the second edge, the third edge and the fourth edge, and the first surface and the second surface shown, the positions of the two components disposed opposite to each other can be reversed. The positional relationship shown in this application is only an example.

[0115] The following is an introduction to a projection device including a curved mirror.

[0116] An embodiment of the present application provides a projection device, including a housing and the aforementioned curved mirror 2. A space for accommodating the curved mirror is provided inside the housing, and there is also a receiving portion for receiving the first connecting portion 22 and the second connecting portion 23 of the curved mirror 2, and this receiving portion can be connected to the first connecting portion 22 and the second connecting portion 23. Please refer to Figure 10 , Figure 11 , Figure 12 and Figure 13 , the housing 6 includes a first receiving portion 61 and a second receiving portion 62 provided on the housing 6. 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.

[0117] In some possible implementation manners, the projection device further includes a first pressing piece 71 and a second pressing piece 72. The first connecting portion 22 of the curved mirror 2 is received in the first receiving portion 61, and the first pressing piece 71 is used to press the first connecting portion 22 tightly in the first receiving portion 61. Further, the second connecting portion 23 of the curved mirror 2 is received in the second receiving portion 62, and the second pressing piece 72 is used to press the second connecting portion 23 tightly in the second receiving portion 62. In other words, the cooperation among the first connecting portion 22, the first receiving portion 61 and the first pressing piece 71, and the cooperation among the second connecting portion 23, the second receiving portion 62 and the second pressing piece 72 can position the curved mirror 2 on the housing 6.

[0118] The following takes the assembly manner of the first receiving portion 61 and the first connecting portion 22 as an example for introduction. In some cases, the assembly manner of the second receiving portion 62 and the second connecting portion 23 is the same as that of the first receiving portion 61 and the first connecting portion 22.

[0119] Please refer to Figures 10 to 13 , the first receiving portion 61 includes a first bottom wall 611, the first connecting portion 22 includes a first positioning surface 222 and a second positioning surface 223 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 back to back 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 piece 71 is used to abut against the second positioning surface 223. Optionally, the first positioning surface 222 and the second positioning surface 223 of the first connecting portion 22 are arranged in parallel. Or optionally, the first positioning surface 222 and the second positioning surface 223 are arranged non-parallel. Optionally, a first positioning surface 222 (such as Figure 4 and Figure 13As shown). Further, the first bottom wall 611 is parallel to and abuts against the first positioning surface 222. Optionally, the first pressing piece and the second pressing piece can be, but are not limited to, one of a sheet metal part, a die-cast part, and a plastic part. It can be seen that the position of the curved mirror 2 is limited between the housing 6 and the first pressing piece 71 by the first pressing piece 71, realizing the positioning of the curved mirror 2 in the first direction and restricting the curved mirror 2 from rotating around the second direction and the third direction, which is beneficial to further improving the position stability of the curved mirror 2 relative to the housing 6, and thus improving the imaging quality of the imaging light passing through the curved mirror 2.

[0120] In some possible implementation manners, the first accommodating 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, etc., and the present 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. Please refer to Figure 4 and Figure 13 , the first positioning post 612 on the housing 6 is accommodated in 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 between the curved mirror 2 and the housing 6, improving the assembly accuracy and assembly efficiency of the projection device. On the other hand, the assembly between the first positioning post 612 and the first positioning portion 221 makes it difficult for the curved mirror 2 to generate a large displacement in the second direction (such as Figure 4 the X direction shown) and the third direction (such as Figure 4 the Y direction shown), thereby further improving the installation stability of the curved mirror 2.

[0121] In some possible implementation manners, the first pressing piece 71 is fixedly connected to the housing 6, for example, by connection methods such as buckles and fixing parts. Please refer to Figure 10 and Figure 11 , a first fixing piece 91 passes through between the first pressing piece 71 and the housing 6, and the first fixing piece 91 applies a force to the first pressing piece 71, and the first pressing piece 71 presses the first connecting portion 22 against the first bottom wall 611.

[0122] Optionally, the first fixing piece 91 is a screw, and the housing 6 is provided with a threaded hole, and the first fixing piece 91 passes through a connection hole 711 provided on the first pressing piece 71 and is screwed to the housing 6. Optionally, self-tapping screw posts or in-mold injection nuts can be provided on the housing 6 to cooperate with the first fixing piece 91 to fix the first pressing piece 71.

[0123] Optionally, a positioning hole 712 is further provided on the first pressing piece 71, and a protruding positioning pin is further provided on the housing 6. The positioning hole 712 and the positioning pin cooperate with each other to improve the assembly efficiency of the first pressing piece 71. Due to the difference in the materials used, the thermal expansion coefficients of the curved mirror 2 and other mating parts of the projection device (such as the housing 6) are usually different. This causes the curved mirror to be easily squeezed by other mating parts 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, etc.), 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 part is distorted, affecting the output quality of the imaging light.

[0124] In some possible embodiments, the thermal expansion coefficient of the curved mirror 2 is different from that of the housing 6. Considering the thermal expansion factors of the housing 6 and the curved mirror 2, there is a reserved gap between the edge 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, so as to reserve thermal expansion space for the curved mirror 2 and the housing 6, reduce the possibility of the curved mirror 2 being deformed due to extrusion, and improve the optical path stability.

[0125] Exemplarily, please refer to Figure 13 , there is a gap between the side wall of the first connecting portion 22 away from the mirror body and the side wall 613 of the first accommodating portion 61. Again exemplarily, there is a gap between the protruding end of the first positioning post 612 and the bottom wall of the first positioning portion 221.

[0126] In some possible embodiments, the projection device further includes a first gasket 81, and the first gasket 81 is clamped between the first pressing piece 71 and the first connecting portion 22. Optionally, the first gasket 81 is made of an elastic material. For example, the first gasket 81 can be selected from rubber strips, foam, silicone rubber, or other elastomeric materials, etc. In some embodiments of the present application, the hardness of the first pressing piece 71 is greater than the hardness of the first gasket 81.

[0127] Alternatively, the first gasket is an elastic structure, such as a metal elastic sheet, a non-metal elastic sheet, or a spring structure, etc.

[0128] On the one hand, the first gasket 81 can reduce the possibility of the first connecting portion 22 being damaged due to being pressed by the first pressing piece 71. On the other hand, the first gasket 81 can absorb the impact force of vibration and bumps, improve the seismic 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 portion 22, reduce the possibility of the curved mirror 2 being deformed due to extrusion, and improve the optical path stability.

[0129] Optionally, a fifth positioning portion 811 may be provided on the first gasket 81, and a sixth positioning portion 713 may be correspondingly provided on the first pressing piece 71. The fifth positioning portion 811 and the sixth positioning portion 713 may cooperate to position the position of the first gasket 81. On the one hand, the installation efficiency can be improved, and on the other hand, the slippage of the first gasket 81 can be avoided, etc., and the stability of the overall structure of the projection device can be enhanced.

[0130] As mentioned above, the assembly manner of the second connecting portion 23 and the second accommodating portion 62 may be the same as the assembly manner of the first accommodating portion 61 and the first connecting portion 22. The following briefly introduces the assembly process of the second accommodating portion 62 and the second connecting portion 23, and the related concepts and effects can be referred to the foregoing.

[0131] In some possible implementation manners, the second accommodating portion 62 includes a second bottom wall, and the second connecting portion 23 includes a third positioning surface 232 and a fourth positioning surface 233 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 piece 72 is used to abut against the fourth positioning surface 233.

[0132] Optionally, the second pressing piece 72 is further provided with a connection hole 721, a positioning hole 722 and a seventh positioning portion 723. The related descriptions can be referred to the related descriptions of the connection hole 711, the positioning hole 712 and the sixth positioning portion 713 above.

[0133] In a possible implementation manner, the second accommodating portion 62 further includes a second positioning post 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. The second positioning groove is used to accommodate the second positioning post.

[0134] In a possible implementation manner, the projection device further includes a second gasket 82, and the second gasket 82 is clamped between the second pressing piece 72 and the second connecting portion 23. Optionally, the second gasket 82 is made of an elastic material. For example, the second gasket 82 can be selected from rubber strips, foam, silicone rubber or other elastomeric materials, etc. In some implementation manners of the present application, the hardness of the second pressing piece 72 is greater than the hardness of the second gasket 82. Alternatively, the first gasket is an elastic structure, such as a metal elastic piece, a non-metal elastic piece, or a spring structure, etc. The related descriptions can be referred to the description of the first gasket 81 above.

[0135] 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.

[0136] In a possible implementation, the outer contour of the curved mirror 2 is rectangular, and 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 housing 6 further includes at least four side walls arranged around the curved mirror 2, and the light source mounting portion 63 is on the side wall of the housing 6 close to the long side of the curved mirror 2. This light source mounting portion is used to mount the light source unit 1.

[0137] This application also provides a display device, which includes the aforementioned curved mirror 2 or includes the aforementioned projection device.

[0138] Please refer to Figure 14 , Figure 14 FIG. is a schematic structural diagram of a display device provided by an embodiment of this application. The display device 10 includes a curved mirror 2, a housing 6, and a light source unit 1. Among them, the light source unit is used to generate imaging light, and the curved mirror 2 is used to reflect the imaging light outside the housing 6.

[0139] In some possible implementations, please refer to and combine Figure 10 , the housing 6 can also be provided with a curved mirror assembly opening 64 to facilitate the assembly of the curved mirror 2. Optionally, the display device 10 further includes a rear cover 101, and the rear cover 101 is fixedly connected to the housing 6 and covers the curved mirror assembly opening 64.

[0140] In some possible implementations, the display device further includes a transmissive-reflective optical element 4, and the transmissive-reflective optical element 4 is used to reflect the imaging light to the curved mirror 2 and transmit the imaging light from the curved mirror 2 outside the housing 6.

[0141] Optionally, the transmissive-reflective optical element 4 can also be replaced with elements such as a window.

[0142] In some possible implementations, the display device 10 further includes a front cover 102, and the front cover 102 is fixedly connected to the housing 6 and covers the transmissive-reflective optical element 4.

[0143] In some possible implementations, please refer to the figure. In the second direction, in the direction from the fourth edge 216 of the curved mirror 2 towards 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 transmissive-reflective optical element 4 (as Figure 3 and Figure 10 shown).

[0144] An embodiment of this application also provides a seat, and the seat includes the aforementioned curved mirror, projection device, or display device.

[0145] An embodiment of the present application further 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 transportation means such as vehicles, robots, drones, ships, and boats. Among them, the vehicle is a vehicle in a broad sense, which may be a transportation means (such as commercial vehicles, passenger vehicles, motorcycles, flying vehicles, trains, etc.), industrial vehicles (such as forklifts, trailers, tractors, etc.), engineering vehicles (such as excavators, bulldozers, cranes, etc.), agricultural equipment (such as lawn mowers, harvesters, etc.), and the like. For another example, the robot may be an automated guided vehicle (AGV), a walking conversation robot, a service robot, or other robots.

[0146] In the description of the present application, the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", "left", "side", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. It should be understood that in some embodiments of the present application, the Z direction, Y direction, etc. mentioned are based on the XYZ rectangular coordinate system for the convenience of describing the features in this solution, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation.

[0147] In addition, in the embodiments of the present application, the term "oppositely arranged" means that the orientations are different, and it does not necessarily limit that the orientations of two parts must be exactly opposite directions. For example, the first surface and the second surface are oppositely arranged, which means that the first surface and the second surface are generally different in orientation in the first direction. For example, one generally faces the positive direction of the X direction, and the other generally faces the negative direction of the X direction. In some possible cases, the first surface and the second surface are parallel and oppositely arranged, and in some other cases, the first surface and the second surface may not be completely opposite, but there may be a certain inclination angle. Similarly, the first edge and the second edge are opposite, and the third edge and the fourth edge are opposite, etc. have similar situations.

[0148] In the embodiments of the present application, the "end" in words such as "one end", "the other end", "the end" not only refers to the end head, endpoint, or end face, but also includes the part that extends a certain axial distance and / or radial distance on the device or element to which the end head, endpoint, or end face belongs.

[0149] In the embodiments of the present application, words such as "exemplarily" or "for example" are used to give examples, illustrations or explanations. Any embodiment or design solution described as "exemplarily" or "for example" in the present application should not be construed as being more preferred or more advantageous than other embodiments or design solutions. Rather, the use of words such as "exemplarily" or "for example" is intended to present relevant concepts in a specific manner.

[0150] "At least one" mentioned in the embodiments of the present application means one or more, and "a plurality" means two or more. "At least one of the following" or its similar expressions refer to any combination of these items, including any combination of single item(s) or plural item(s). 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 and indicates that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. Here, A and B can be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0151] Also, unless otherwise stated, the ordinal numbers such as "first" and "second" used in the embodiments of the present application are used to distinguish multiple objects and are not used to limit the order, time sequence, priority or importance of multiple objects. For another example, the first connecting portion and the second connecting portion are only for conveniently describing the fixing portion in different embodiments, and do not indicate differences in their structures, importance levels, setting orders, etc.

Claims

1. A curved mirror, characterized in that, it includes: a mirror body, a first connecting portion and a second connecting portion, and the first connecting portion and the second connecting portion are used to fix the curved mirror, 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 direction of the first surface is the first direction; the first surface and the second surface are arranged opposite to each other along the first direction, the first edge and the second edge are arranged opposite to each other along the second direction, and the first direction is perpendicular to the second direction; the first connecting portion protrudes from the first edge, the second connecting portion protrudes from the second edge, the length of the first connecting portion along the third direction is less than the length of the first edge along the third direction, and the length of the second connecting portion along the third direction is less than the length of the second edge along the third direction; 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, and 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, 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, 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 [1 / 3, 1 / 2], and 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 [1 / 3, 1 / 2].

4. The curved mirror according to any one of claims 1-3, 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 1-3, 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 1-5, 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 post.

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 1-8, characterized in that, The first connecting portion includes a first positioning surface and a second positioning surface, both the first positioning surface and the second positioning surface are flat surfaces and perpendicular to the first direction.

10. A projection device, characterized in that, the projection device includes a housing and the curved mirror according to any one of claims 1-9, the housing includes a first receiving portion and a second receiving portion provided 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 together.

12. A display device, characterized in that, the display device includes a light source unit, and the display device further includes the projection device according to claim 10 or 11, the light source unit is installed 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 body in the projection device is used to reflect the imaging light outside the housing.

13. A seat, characterized in that, the seat includes 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 includes the display device according to claim 12, and the display device is installed on the backrest, headrest or neck of the seat.

14. A mobile terminal, characterized in that, the mobile 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.

Images