CN220232088U

CN220232088U - Lens rotation control structure, display device and vehicle

Info

Publication number: CN220232088U
Application number: CN202321850478.4U
Authority: CN
Inventors: 黄琦; 邓远博; 李田; 吕晨科
Original assignee: Nanjing Ruiweishi Technology Co ltd
Current assignee: Nanjing Ruiweishi Technology Co ltd
Priority date: 2023-07-14
Filing date: 2023-07-14
Publication date: 2023-12-22
Anticipated expiration: 2033-07-14

Abstract

The application relates to the technical field of projection display, in particular to a lens rotation control structure, display equipment and a vehicle. According to the electromagnetic force-applying device, the electromagnetic driving force between the electromagnetic force-applying piece and the electromagnetic force-receiving piece is utilized, the rotating structure of the optical lens is separated from the force-applying structure relatively, the rotating structure of the optical lens connected with the electromagnetic force-receiving piece can move along the guide piece on the adjusting base under the driving of electromagnetic force, and the force-applying surface is not in direct contact, so that corresponding mechanical friction is reduced. The angle adjustment of the optical lens does not need a direct mechanical transmission structure, and the rotation of the optical lens is smoother and quieter.

Description

Lens rotation control structure, display device and vehicle

Technical Field

The application relates to the technical field of projection display, in particular to a lens rotation control structure, display equipment and a vehicle.

Background

The HUD (Head Up Display) is a brand new way of realizing vehicle-mounted Display by using reflection on a vehicle windshield, and specifically, a light machine of the HUD Display device emits Display light, and the Display light is projected on the windshield through a corresponding optical lens to generate a corresponding virtual image, so that an enhanced Display effect is formed with the real world outside the windshield. However, because of the requirement of projection position adjustment, the optical lens in the HUD display device needs to be rotationally controlled by the adjusting device, and at present, the adjusting device mostly adopts a transmission mechanical structure such as a screw rod, so that the noise is large, the stability requirement on mechanical design is high, and sometimes, the problem of clamping stagnation exists between transmission contact surfaces.

Disclosure of Invention

An object of the application is to provide a lens rotation control structure, display device and vehicle, solved among the prior art HUD display device's optical lens rotation control's effect and relied on the stability of transmission mechanical structure, and mechanical transmission can send the technical problem of noise.

In order to solve the technical problems, the application adopts the following technical scheme:

in a first aspect, the present application provides a lens rotation control structure comprising:

the optical lens is provided with a rotating part and a free part rotating around the rotating part, the free part is connected with an electromagnetic stress piece, and the rotating angle of the connecting point between the free part and the electromagnetic stress piece around the rotating part is synchronous with the rotating angle of the free part around the rotating part;

the electromagnetic force application device comprises an electromagnetic force application part, an electromagnetic force application part and an adjusting base, wherein the electromagnetic force application part is arranged on the electromagnetic force application part;

at least part of the electromagnetic force-bearing piece is matched with the guide piece and at least has a first position and a second position relative to the guide piece under the electromagnetic force driving of the electromagnetic force-applying piece, the optical lens is driven to have a first angle when the electromagnetic force-bearing piece is in the first position, and the optical lens is driven to have a second angle when the electromagnetic force-bearing piece is in the second position.

In an alternative embodiment of the first aspect, the adjustment base is fixed to an inner wall of the display device by screws.

In an alternative implementation manner of the first aspect, the electromagnetic force application member includes an electromagnetic coil, a power supply for supplying current to the electromagnetic coil, and a controller for adjusting the current of the electromagnetic coil.

In an optional implementation manner of the first aspect, the guide member is an arc-shaped guide groove, at least part of the electromagnetic force-bearing member is located in the guide groove, and a rotation angle of the connection point between the free portion and the electromagnetic force-bearing member around the rotation portion is consistent with an arc-shaped angle.

In an alternative embodiment of the first aspect, the free portion is fixedly connected to the electromagnetic force-bearing member.

In an alternative embodiment of the first aspect, the guide member comprises at least one guide rail, and the electromagnetic force receiving member is provided with a guide hole, and the guide hole is arranged on the guide rail in a penetrating way so that the electromagnetic force receiving member moves along the guide rail.

In an alternative embodiment of the first aspect, the free portion is rotatably connected to the electromagnetic force receiving member.

In an optional implementation manner of the first aspect, the rotating portion of the optical lens is implemented by a rotating shaft penetrating through two ends of the optical lens, and two ends of the rotating shaft are fixed on an inner wall of the display device through mounting bases.

In an alternative embodiment of the first aspect, the mounting base is provided with a reinforcing rib for facilitating gripping.

In an optional implementation manner of the first aspect, the adjustment base further includes an electromagnetic control member, and a direction of an electromagnetic force exerted by the electromagnetic control member on the electromagnetic force receiving member is opposite to a direction of an electromagnetic force exerted by the electromagnetic force applying member on the electromagnetic force receiving member.

In an alternative embodiment of the first aspect, the guide member has a first end on which the electromagnetic force application member is disposed and a second end opposite the first end on which the electromagnetic control member is disposed.

In an alternative embodiment of the first aspect, the electromagnetic force application member and/or the electromagnetic control member is arranged at the bottom side with respect to the direction of movement of the guide member.

In an optional implementation manner of the first aspect, the electromagnetic force-bearing member and the electromagnetic control member are two electromagnets with the same poles oppositely arranged.

In a second aspect, the present application provides a display device comprising the lens rotation control structure of the first aspect.

In a third aspect, the present application provides a vehicle comprising the lens rotation control structure of the first aspect or the display device of the second aspect.

Compared with the prior art, the electromagnetic force application device has the advantages that the electromagnetic driving force between the electromagnetic force application part and the electromagnetic force application part is utilized, the rotating structure of the optical lens is separated from the force application structure relatively, the rotating structure of the optical lens connected with the electromagnetic force application part can move along the guide part on the adjusting base under the driving of electromagnetic force, and the force application surface is not in direct contact, so that corresponding mechanical friction is reduced. The angle adjustment of the optical lens does not need a direct mechanical transmission structure, and the rotation of the optical lens is smoother and quieter.

Drawings

In order to more clearly illustrate the technical solutions of the present application, the drawings that are used in the description of the technical solutions will be briefly described below. It is obvious that the drawings in the following description are only some examples described in the present application, and that other drawings may be obtained from these drawings without inventive work for a person of ordinary skill in the art.

Fig. 1 is a schematic view of a HUD projection display in some examples of the present application.

Fig. 2 is a schematic diagram of a HUD display device in some examples of the present application.

Fig. 3 is a schematic view of a lens rotation control structure according to some examples of the present application.

Fig. 4 is a schematic view of a lens rotation control structure according to some examples of the present application.

Fig. 5 is an exploded view of a lens rotation control structure in some examples of the present application.

Fig. 6 is a schematic view of a lens rotation control structure according to some examples of the present application.

Fig. 7 is a schematic view of a lens rotation control structure according to some examples of the present application.

Fig. 8 is an exploded view of a lens rotation control structure in some examples of the present application.

Fig. 9 is a schematic diagram of an electromagnetic force driving control circuit in some examples of the present application.

Fig. 10 is a schematic view of a vehicle in some examples of the present application.

Description of the embodiments

The present application will be described in detail below with reference to the attached drawings, but the descriptions are only examples described in the present application and are not limiting, and all changes in structure, method or function etc. made by those of ordinary skill in the art based on these examples are included in the protection scope of the present application.

It should be noted that in different examples, the same reference numerals or labels may be used, but these do not represent absolute relationships in terms of structure or function. Also, the references to "first," "second," etc. in the examples are for descriptive convenience only and do not represent absolute distinguishing relationships between structures or functions, nor should they be construed as indicating or implying a relative importance or number of corresponding objects. Unless specifically stated otherwise, reference to "at least one" in the description may refer to one or more than one, and "a plurality" refers to two or more than two.

In addition, in representing the feature, the character "/" may represent a relationship in which the front-rear related objects exist or exist, for example, a head-up display/head-up display may be represented as a head-up display or a head-up display. In the expression operation, the character "/" may indicate that there is a division relationship between the front and rear related objects, for example, the magnification m=l/P may be expressed as L (virtual image size) divided by P (image source size). Also, "and/or" in different examples is merely to describe the association relationship of the front and rear association objects, and such association relationship may include three cases, for example, a concave mirror and/or a convex mirror, and may be expressed as the presence of a concave mirror alone, the presence of a convex mirror alone, and the presence of both concave and convex mirrors.

The HUD mainly utilizes the optical reflection principle, imaging light to be displayed is reflected into human eyes through the transparent surface, the human eyes can observe corresponding information along the opposite direction of the light, and a special display screen is not needed, so that another convenient implementation mode is provided for information display. In particular, a transparent surface (such as a windshield) is arranged in the front view of the driver, and if the driver needs to view information when driving the vehicle, the view does not need to be turned to a place beyond the front of the vehicle, so that the driving safety of the driver is improved. In some examples, a HUD display device may be fixedly mounted on a vehicle center console, where the HUD display device includes an optical engine, an optical lens, and the like, a backlight of the optical engine may implement illumination based on LED (Light Emitting Diode ), laser, and the like, and an image source of the optical engine may implement display based on LCD (Liquid Crystal Display ), DMD (Digital Micromirror Devices, digital micromirror device), MEMS (Micro-Electro-Mechanical System, microelectromechanical system) micromirror, LCOS (Liquid Crystal on silicon ), and the like. The display surface of the optical machine corresponding to the image source can display an image (display content) to be projected on an imaging position, display light of the image is projected, the display light is finally reflected on a windshield of the vehicle through light path planning of an optical lens, the windshield serves as a transparent surface for reflecting the display light and can serve as a display screen, a driver can directly observe a virtual image corresponding to the display content through the windshield, for example, the display content can be navigation information, vehicle speed and the like.

As shown in fig. 1, the HUD display device may at least include an optical machine 1, a first mirror 2, and a second mirror 3, where in this example, the first mirror 2 and the second mirror 3 are optical lens groups that cooperate to implement optical path transmission, and the first mirror 2 and the second mirror 3 in the optical lens groups may project display light projected by the optical machine 1 onto a windshield 4. In some examples, the first mirror 2, the second mirror 3 may be provided as a concave mirror, a convex mirror, or the like as required. In some examples, the optical lens group may also enable planning of the optical path by one or more transmissive lenses. The optical machine 1 projects light rays for displaying corresponding information, and the first reflecting mirror 2 and the second reflecting mirror 3 are used for realizing light path planning, so that light path customization can be carried out in a smaller space, and different projection display requirements are met. The display light projected by the optical machine 1 is finally projected on the windshield 4 of the vehicle through multiple reflections of the first reflecting mirror 2 and the second reflecting mirror 3, and a driver 6 in the vehicle can see a virtual image 5 formed by the projection light of the optical machine 1 passing through the windshield 4 against the windshield 4, and the virtual image can be corresponding to parameter information of the vehicle and the like. In some examples, the first mirror 2 and the second mirror 3 may also be adjusted to a certain degree of angle, so as to change the projection position of the projection light on the windshield 4, so as to adapt to the heights of different drivers 6. It should be added that, for the characteristics of different optical machines, a diffuse mirror can be correspondingly arranged to adjust the corresponding imaging effect. In some examples, fresnel lenses, waveguide optics, diffractive optics, holographic optics, tapered fibers, etc. may also be included in the HUD display device to enable light path planning and optimization.

As shown in fig. 2, the HUD display device 100 integrated in the vehicle center console includes a body including an optical engine 1, a first mirror 2, and a second mirror 3, and is enveloped by a housing 101, and the optical engine and the optical lens are accommodated in an internal space of the housing 101 and stably fixed to the inside of the housing 101 by a bracket or the like. Referring to fig. 1, an optical engine 1, a first mirror 2, and a second mirror 3 are mutually matched to realize a certain light path planning in a housing 101, and finally display light is projected out through a window 102 formed in the housing 101. When the HUD display device 100 is embedded in a center console of an automobile, the window 102 on the housing 101 faces the vehicle windshield above the center console, and accordingly, display light projected from the window 102 is reflected on the windshield to form a virtual image that can be seen by the human eye. As is apparent from the above examples, the position at which the virtual image is projected on the windshield is related to the reflection angles of the first mirror 2 and the second mirror 3. Taking the first reflecting mirror 2 as an example, when the virtual image to be projected by a higher driver is displayed at a higher position of the windshield, the angle of the first reflecting mirror 2 can be adjusted clockwise, so that the trend of the light path is changed, and the projection position is moved upwards, and vice versa.

As described above, in order to adapt to different projection heights, the HUD display device needs a corresponding adjusting device to implement the angle adjustment of the optical lens, and specifically includes at least a force application structure and a rotating structure, where the rotating structure is combined with the optical lens, and can drive the optical lens to rotate at an angle under the action of an external force, and the force application structure is a source for applying the external force, such as a motor-driven mechanical structure. In some examples, the cooperation of the force application structure and the rotating structure can be converted into angular rotation through the linear motion of the screw rod, or the angular rotation of the lens can be realized through a combination of a turbine and a worm. However, the above-mentioned mode needs mechanical contact cooperation to carry out direct transmission, and there is frictional force in the contact surface each other, not only can send the noise, can also produce the jamming sometimes, leads to projection position's regulatory failure, and the navigating mate just can not carry out information at the best eye box position and look over.

In some examples, as shown in fig. 3 and 4, the angular adjustment of the optical lens 20 is performed by electromagnetic driving, and accordingly, the lens rotation control structure includes the optical lens 20 to be mounted in the HUD display device, the optical lens 20 may be relatively fixed to the inner wall of the display device by a mounting base 21, and the mounting base 21 may be fixed in a screw hole of the inner wall surface, optionally with a screw. The fixed optical lens 20 includes a rotating portion and a free portion, the rotating portion can rotate through a rotating shaft disposed at a position of a transverse central axis of the optical lens 20, the rotating shaft is correspondingly fixed with the mounting base 21, and the free portion can be an upper side and a lower side of the optical lens 20 relative to the transverse central axis, and is determined in a placement manner of fig. 3 and fig. 4. In order to apply an external force to the free portion, which rotates the entire optical lens 20, the free portion is connected with an electromagnetic force receiving member 23, and the electromagnetic force receiving member 23 can receive the applied electromagnetic force under the influence of the electromagnetic field, so that direct contact is not necessary as in the mechanical transmission structure. The lens rotation control structure further includes an adjusting base 22, referring to fig. 4, the adjusting base 22 is provided with an arc-shaped guiding groove 220, the curvature of the guiding groove 220 is adapted to the angle of rotation of the free portion, and the electromagnetic force-receiving member 23 can at least partially move back and forth along the arc-shaped direction of the guiding groove 220 in the guiding groove 220, and accordingly, the optical lens can also rotate with the angle. It should be noted that, the guide groove 220 has a function of limiting the movement of the electromagnetic force-receiving member 23 in other directions, but it does not necessarily mean that the guide groove 220 must have continuous contact with the electromagnetic force-receiving member 23, for example, the electromagnetic force-receiving member 23 may contact with the inner surface of the guide groove 220 after receiving the electromagnetic force deviated from the guide groove 220, so that the force-receiving direction of the electromagnetic force-receiving member 23 is changed by the supporting force. Optionally, a lubricant may be provided on the inner surface of the guide groove 220 to reduce friction when the electromagnetic force receiving member 23 is in contact with the guide groove 220.

In some examples, the adjustment base 22 may be secured to the inner wall of the display device by screws, thus ensuring that the optical lens 20 and the adjustment base 22 are mounted separately and have a stable relationship to each other. In some examples, the two ends of the guiding slot 220 are respectively provided with the electromagnetic force application member 24 and the electromagnetic control member 25, alternatively, the electromagnetic force application member 24 and the electromagnetic control member 25 may be arranged in a position-changing manner, for example, the electromagnetic force application member 24 is located above the electromagnetic force receiving member 23 along the arc-shaped guiding slot 220. The electromagnetic force applying member 24 can control the magnitude and direction of the electromagnetic force applied to the electromagnetic force receiving member 23 (refer to fig. 9 for a specific example), and the electromagnetic force receiving member 23 can be located at different positions, such as a first position and a second position, in the guide slot 220 by controlling the magnitude and direction of the electromagnetic force, that is, a balanced resultant force is formed at different positions, so that the optical lens 20 can rotate at different angles, such as a first angle and a second angle. The electromagnetic control member 25 disposed on the other side of the electromagnetic force receiving member 23 can apply a reverse force to the electromagnetic force receiving member 23, that is, the electromagnetic force applied by the electromagnetic control member 25 to the electromagnetic force receiving member 23 is opposite to the electromagnetic force applied by the electromagnetic force applying member 24 to the electromagnetic force receiving member 23. Thus, the force exerted on the electromagnetic force-bearing member 23 by the electromagnetic control member 25 can offset the excessive force exerted on the electromagnetic force-bearing member 23 by the electromagnetic force-applying member 24, so that not only unnecessary vibration is reduced, but also a buffer effect can be achieved, and the adjustment of the optical lens 20 is more stable. In some examples, to realize the reverse acting force of the electromagnetic control member 25 on the electromagnetic force-receiving member 23, the electromagnetic control member 25 and the electromagnetic force-receiving member 23 may be two electromagnets, where two ends of each electromagnet have N poles and S poles, respectively, as shown in fig. 4, and the opposite end surfaces of the electromagnetic control member 25 and the electromagnetic force-receiving member 23 all use the same magnetic pole, for example, the opposite ends use S poles, alternatively, may also be N poles, and due to the principle that the electromagnets have the same poles and repel each other, the repulsive force between each other will be reversely applied on the electromagnetic force-receiving member 23 on the premise that the electromagnetic control member 25 is fixed on the adjusting base 22, so as to provide the balanced force for the electromagnetic force-receiving member 23. In some examples, the electromagnetic control member 25 may also employ the same electromagnetic components as the electromagnetic force application member 24, such as the electromagnetic coil shown in fig. 9. In some examples, a spring member may also be employed between the electromagnetic control member 25 and the electromagnetic force-receiving member 23 to achieve a corresponding opposing force. Alternatively, the electromagnetic force receiving member 23 may be directly connected to one end of the guide slot 220 through a spring member without providing the electromagnetic control member 25, and the other end of the guide slot 220 is provided with the electromagnetic force applying member 24, wherein the electromagnetic force applied to the electromagnetic force receiving member 23 by the electromagnetic force applying member 24 is balanced with the elastic force generated by the spring member.

Fig. 5 is an exploded view of the lens rotation control structure in the examples of fig. 3 and 4, in which a rotary shaft 203 is disposed on the back surface of the optical lens 20, two ends of the rotary shaft 203 are respectively fixed on the inner wall of the display device through mounting bases 21, and the rotary shaft 203 can rotate between the mounting bases 21, thereby driving the optical lens 20 fixed thereto to rotate at an angle. In some examples, the mounting base 21 is provided with a reinforcing rib 210, and the reinforcing rib 210 may connect at least the bottom surface and the side surface of the mounting base 21 and extend upward for a certain length to form a handle, so that on one hand, the overall strength of the mounting base may be enhanced, and more importantly, a grip may be provided for mounting. Accordingly, when the mount 21 and the optical lens 20 including the rotation shaft 203 need to be mounted, an installer or a machine can lift the entire optical lens 20 by a handle provided by the reinforcing ribs 210, so that it can be easily mounted inside the housing of the display device.

In some examples, the adjustment base 22 is provided with mounting holes 221 at both sides thereof, each mounting hole 221 is fitted with a screw 222, and the screw 222 passes through the mounting hole 221 and may be fixed to an inner wall of the display device, i.e., the adjustment base 22 is fixed inside a housing of the display device by the screw 222. Accordingly, the mounting base 21 and the adjusting base 22 are respectively fixed at different positions inside the display device housing, but the matching relationship of the two can ensure that the free portion 201 of the optical lens 20 can realize certain electromagnetic control in the guide groove 220 of the adjusting base 22. In this example, the guide slot 220 has an arc shape, and the curvature of the arc shape is consistent with the rotation curvature of the free portion 201 of the optical lens 20, so that the optical lens 20 can rotate in a step-like manner when the electromagnetic force-receiving member 23 connected with the free portion 201 of the optical lens 20 moves in the guide slot 220. Correspondingly, the free portion 201 of the optical lens 20 is provided with a connecting rod 202, the connecting rod 202 is installed in the through hole of the electromagnetic force-bearing member 23, the installation process can be that the electromagnetic force-bearing member 23 is firstly placed in the guide groove 220, and the connecting rod 202 passes through the opening on the side surface of the guide groove 220 and is connected into the through hole of the electromagnetic force-bearing member 23. In order to avoid the self-rotation of the electromagnetic force-receiving member 23 on the connecting rod 202, the connecting rod 202 is not in a regular cylindrical shape, alternatively, the cross section of the connecting rod 202 may be in a semicircular shape, that is, a closed shape in which the profile of the upper half is a straight line and the profile of the lower half is a curved line, and the through holes of the electromagnetic force-receiving member 23 are also in a matched shape, so that the direction in which the electromagnetic force-receiving member 23 is connected to the free portion 201 can be uniquely determined, and the possibility of incorrect installation is reduced.

As described above, the electromagnetic force application member 24 and the electromagnetic control member 25 are respectively mounted on the upper and lower ends of the guide groove 220, and specifically, screw holes are provided on the side surfaces of the upper and lower ends of the guide groove 220. In this example, the electromagnetic force application member 24 provided at the lower portion is fixed in the screw hole at the lower portion of the guide groove 220 by the screw 241, the electromagnetic control member 25 provided at the upper portion is fixed in the screw hole at the upper portion of the guide groove 220 by the screw 251, and the electromagnetic force receiving member 23 is controlled by the electromagnetic force between the electromagnetic force application member 24 and the electromagnetic control member 25 along the guide groove 220. In some examples, the electromagnetic force application member 24 and the electromagnetic control member 25 are not disposed at two ends of the guide slot 220, and the electromagnetic force application member 24 and/or the electromagnetic control member 25 are disposed on the entire arc bottom surface of the guide slot 220, and specifically, the direction of the electromagnetic force is controlled according to the disposed position, so as to ensure that the electromagnetic force receiving member 23 disposed in the guide slot 220 is subjected to effective driving force. Alternatively, the electromagnetic force application member and the electromagnetic control member disposed at the bottom surface of the guide groove 220 are not limited to one, and may be disposed at a specific distance along the bottom surface of the guide groove 220, and the electromagnetic force receiving member 23 disposed in the guide groove 220 may be relay-controlled between adjacent electromagnetic force application members or electromagnetic control members, and the corresponding electromagnetic force direction may be determined according to the positional relationship between the adjacent electromagnetic force application members or electromagnetic control members.

The electromagnetic force receiving element 23 is fixed to the free portion 201 of the optical lens 20 via the connecting rod 202, and the two are fixedly connected, so that the electromagnetic force receiving element and the free portion do not have a rotational relationship or an engagement structure. The connection point between the free portion 201 and the electromagnetic force-receiving member 23 is the position of the connecting rod 202, and since the connection point is fixed relative to the position on the free portion 201, the rotation angle of the connection point around the rotation shaft 203 is synchronous with the rotation angle of the free portion 201 around the rotation portion, that is, the rotation angular speed is consistent, which has the advantages that after the electromagnetic force-receiving member 23 is driven by electromagnetic force, external force is applied to the free portion 201 through the connection points, and since the position of the connection point is not changed under the rotation of the optical lens 20, the stability of the external force application is higher, the optical lens 20 can avoid vibration better during rotation, and the display effect of the user in the rotation process is smoother.

In some examples, as shown in fig. 6 and 7, the lens rotation control structure includes an optical lens 20, and referring to fig. 3 to 5, the optical lens 20 may be fixed to an inner wall of the display device by two mounting bases 21, and a rotation shaft is provided between the two mounting bases 21, and a rotation portion of the optical lens 20 is mounted on the rotation shaft, thereby ensuring that the optical lens 20 can be angularly rotated along the rotation portion. In order to provide a rotational external force on the free portion of the optical lens 20, an adjusting base 22 is correspondingly disposed, and the adjusting base 22 is also fixed on the inner wall of the display device, which is not described herein. The adjustment base 22 is internally provided with guides, in particular linear guides, as will be described in more detail below with reference to fig. 8. The electromagnetic force application member 24 and the electromagnetic control member 25 may be provided at both ends of the guide member, alternatively, the electromagnetic control member 25 is not an essential electromagnetic control member. In the arrangement of fig. 7, the electromagnetic force application member 24 may be disposed at the left end of the guide rail 220, and the electromagnetic control member 25 is disposed at the right end of the guide rail 220 correspondingly, alternatively, the electromagnetic force application member 24 may be disposed at the right end of the guide rail 220, and the electromagnetic control member 25 is disposed at the left end of the guide rail 220 correspondingly. Specifically, the electromagnetic force receiving member 23 connected to the free portion of the optical lens 20 is also mounted on the guide rail 220 while being movable between the electromagnetic force applying member 24 and the electromagnetic control member 25 by a distance that can be driven by the electromagnetic force controlled by the electromagnetic force applying member 24. Unlike the examples of fig. 3-5, the guide member of the present example avoids an arcuate shape, which ensures that the electromagnetic force receiving member 23 remains in direct line with the front of the electromagnetic force applying member 24 when moving along the guide member, and the corresponding electromagnetic force control is more accurate, as described in the examples of fig. 3-5.

Fig. 8 is an exploded view of the lens rotation control structure of the example of fig. 6 and 7, wherein the optical lens 20 is fixed on the inner wall of the display device by the mounting base 21, and a rotation shaft for rotating the lens is further provided between the optical lens 20 and the mounting base 21. The adjusting base 22 is fixed on the inner wall of the display device through the mounting holes 221 and the screws 222 arranged on two sides, and a proper distance is reserved between the installed adjusting base 22 and the installed optical lens 20, so that the electromagnetic force can be driven. In some examples, the adjusting base 22 may be a hollow frame, in which the electromagnetic force applying member 24 and the electromagnetic control member 25 are disposed in the inner space of the adjusting base 22, and the electromagnetic force receiving member 23 is disposed between the electromagnetic force applying member 24 and the electromagnetic control member 25 and protrudes from the upper opening of the adjusting base 22 to be connected with the free portion 201 of the optical lens 20. In order to restrict the movement range of the electromagnetic force-receiving element 23 in the inner space of the adjustment base 22, this can be achieved by means of the guide rail 220, the electromagnetic force-receiving element 23 having a guide hole which is arranged through the guide rail 220, the electromagnetic force-receiving element 23 being movable back and forth on the guide rail 220 in the direction of the guide rail 220. In this example, the guide rails 220 are provided in two and parallel to each other, so that the stability of the movement of the electromagnetic force receiving member 23 can be improved. Alternatively, the electromagnetic force application member 24 and the electromagnetic control member 25 are provided at both ends of the guide rail 220, respectively. In some examples, the electromagnetic force application member 24 and the electromagnetic control member 25 may also be disposed at the bottom of the guide rail 220, and the electromagnetic force application member 23 is driven to move on the guide rail 220 by controlling the direction of the electromagnetic force.

It should be noted that, the free portion 201 of the optical lens 20 is provided with a rotating ball 202, and correspondingly, a rotating groove is provided at a position of the electromagnetic force receiving member 23 corresponding to the free portion 201, a fixed manner of rotational connection is adopted between the free portion 201 and the electromagnetic force receiving member 23, the rotating ball 202 can be installed in the rotating groove, the rotating ball 202 is ensured not to fall off from the rotating groove, but the rotating ball 202 can rotate in the rotating groove. In some examples, a swivel ball may also be provided at the portion of the electromagnetic force-receiving member 23 protruding from the adjustment base 22, with a swivel slot correspondingly provided on the free portion 201. The matching relationship between the rotating ball head and the rotating groove can offset the position change of the electromagnetic force-bearing piece 23 and the angle difference of the optical lens 20, and more importantly, the position of the connecting point of the electromagnetic force-bearing piece 23 and the free part 201 is kept fixed and does not change, the connecting point is consistent with the movement direction of the free part 201, and the electromagnetic force-bearing piece 23 rotates around the rotating part of the optical lens 20 synchronously at the same angle, so that the external force applied on the free part 201 by the electromagnetic force can be ensured to be more stable and uniform.

As shown in fig. 9, in some examples, the electromagnetic force application member and/or the electromagnetic control member may use a controller to control the direction and magnitude of electromagnetic force, and specifically includes an electromagnetic coil 91, a power source 92 for providing current to the electromagnetic coil 91, and a controller 94 for adjusting the current of the electromagnetic coil 91. The power supply 92 causes a current to be generated in the closed loop of the solenoid 91 and, according to ampere's law, a magnetic field is generated around the energized conductor, the direction of the magnetic field being determined by the direction of flow over the solenoid 91. In the above example, the magnetic pole of the electromagnetic coil 91 opposite to the end of the electromagnetic force-receiving member is controlled by changing the direction of the current, so as to ensure that the attraction or repulsion relationship with the electromagnetic force-receiving member conforms to the direction of electromagnetic force control. Further, the controller 94 may also control the current in the loop in which the electromagnetic coil 91 is located, for example, the controller 94 may control the variable resistor 93 connected in series in the loop, and change the magnitude of the generated current by changing the total resistance in the entire loop. Accordingly, the current increases, the electromagnetic force generated by the electromagnetic coil 91 increases, the current decreases, and the electromagnetic force generated by the electromagnetic coil 91 also decreases.

In some examples, the lens rotation control structure described above is integrated into a HUD display device, and referring to fig. 1 and 2, the HUD display device may further include an optical machine, an optical lens, a housing, and the like, and the lens rotation control structure may implement angle adjustment of at least one of the optical lenses. Taking the first mirror 2 in fig. 1 and 2 as an example, after the display light of the optical engine 1 reaches the first mirror 2, the display light is reflected from the first mirror 2 to the second mirror 3, and if the angle of the first mirror 2 is changed by the mirror rotation control structure, the direction of the display light reflected to the second mirror 3 can be changed, so that the projection position of the display light reflected from the second mirror 3 to the windshield also changes. As shown in fig. 2, the first mirror 2 is disposed near two facing inner walls of the housing 101, and accordingly, an upper inner wall thereof may fix the mounting base in the example of fig. 3 to 8, a lower inner wall thereof may fix the adjustment base in the example of fig. 3 to 8, the mounting base may rotate the free portion of the first mirror 2 around the rotating portion, and an electromagnetic force receiving member on the free portion may be driven by electromagnetic force in the adjustment base, thereby driving the angle of the first mirror 2 to rotate. The position of the connection point between the free portion of the first reflecting mirror 2 and the electromagnetic force receiving member is kept unchanged, and accordingly the rotation angle of the connection point around the rotating portion is synchronous and consistent with the rotation angle of the free portion around the rotating portion, so that when the electromagnetic force receiving member moves on the guide member (guide groove or guide rail, etc.) in a specific direction, the movement of the electromagnetic force receiving member can be converted into a driving force applied to the connection point, and the first reflecting mirror 2 rotates around its rotating portion. That is, the electromagnetic force member has at least a first position and a second position relative to the guide member under the electromagnetic force of the electromagnetic force member, and the first mirror 2 is driven to have a first angle when the electromagnetic force member is in the first position, and the first mirror 2 is driven to have a second angle when the electromagnetic force member is in the second position.

As shown in fig. 10, in some examples, the vehicle may incorporate the HUD display device described above, with the corresponding identification information being projected onto the vehicle windshield by projection, with the effect that the corresponding identification information (vehicle speed, navigation information, etc.) is directly visible from within the cockpit viewing the windshield. Because the optical lenses in the HUD display device are driven by the electromagnetic driving mode in the examples of fig. 3-8, the rotation of the lenses can be smoothly realized under the condition of low noise, so that different heights of the projection virtual images on the windshield can be changed, and the device is suitable for different heights of drivers. In addition, the driver can also look over the speed of the vehicle, navigation information and the like against the windshield in the driving process without looking over the traditional instrument panel at low head, so that the driving safety is improved. The vehicle is not limited to the automobile shown in fig. 10, and may include buses, trucks, excavators, motorcycles, trains, high-speed rails, ships, yachts, airplanes, spacecraft, and the like. The projected windshield is not limited to the front windshield of the automobile, and may be a transparent surface in other positions.

In summary, the present application utilizes the electromagnetic driving force between the electromagnetic force application member and the electromagnetic force receiving member to relatively separate the rotating structure of the optical lens from the force application structure, and the rotating structure of the optical lens connected with the electromagnetic force receiving member can move along the guide member on the adjusting base under the driving of electromagnetic force. The angle adjustment of the optical lens does not need a direct mechanical transmission structure, and the rotation of the optical lens is smoother and quieter.

It should be understood that while this specification includes examples, any of these examples does not include only a single embodiment, and that this depiction of the specification is for clarity only. Those skilled in the art will recognize that the embodiments of the present utility model may be combined as appropriate with one another to form other embodiments as would be apparent to one of ordinary skill in the art.

The above list of detailed descriptions is only specific to possible embodiments of the present application, they are not intended to limit the scope of the present application, and all equivalent embodiments or modifications that do not depart from the teachings of the present application are intended to be included in the scope of the present application.

Claims

1. A lens rotation control structure, comprising:

2. The lens rotation control structure of claim 1, wherein the electromagnetic force application member comprises an electromagnetic coil and a power supply for supplying current to the electromagnetic coil, and a controller for adjusting the current of the electromagnetic coil.

3. The lens rotation control structure according to claim 1, wherein the guide member is an arc-shaped guide groove, at least part of the electromagnetic force receiving member is located in the guide groove, and a rotation angle of the connection point between the free portion and the electromagnetic force receiving member around the rotation portion is consistent with an arc-shaped angle.

4. The lens rotation control structure of claim 1, wherein said guide member includes at least one guide rail, said electromagnetic force receiving member being provided with a guide hole, said guide hole being provided through said guide rail to move said electromagnetic force receiving member along said guide rail.

5. The lens rotation control structure according to claim 1, wherein the rotating portion of the optical lens is implemented by a rotating shaft penetrating through both ends of the optical lens, both ends of the rotating shaft being fixed to an inner wall of the display device by mounting bases.

6. The lens rotation control structure of claim 1, wherein said adjustment base further comprises an electromagnetic control member that exerts an electromagnetic force on said electromagnetic force bearing member in a direction opposite to the electromagnetic force exerted on said electromagnetic force bearing member by said electromagnetic force application member.

7. The lens rotation control structure of claim 6, wherein said guide member has a first end on which said electromagnetic force application member is disposed and a second end opposite said first end on which said electromagnetic control member is disposed.

8. The lens rotation control structure of claim 6, wherein the electromagnetic force-bearing member and the electromagnetic control member are two electromagnets disposed in opposition to each other with the same polarity.

9. A display device comprising the lens rotation control structure of any one of claims 1-8.

10. A vehicle comprising the lens rotation control structure of any one of claims 1-8 or the display device of claim 9.