Rearview mirror and method of controlling the same

Abstract

The application relates to the technical field of rearview mirrors, in particular to a rearview mirror and a control method thereof. The rearview mirror comprises a main lens, a shell, a secondary lens and a rotating mechanism. The main lens is fixed to the shell. The secondary lens is installed on the shell. The rotating mechanism is connected to the secondary lens in transmission and is used for driving the secondary lens to rotate so as to change the included angle between the normal plane of the secondary lens and the initial normal plane. The secondary lens is a curvature lens, and the initial normal plane is the normal plane of the secondary lens in the initial position. The rearview mirror can reduce the visual field limitation of the driver when turning.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rearview mirror, in particular to a rearview mirror and a control method thereof. BACKGROUND

[0002] The rearview mirror is a component for providing rear view for the driver, which can reflect the light from the rear to the driver's eyes, thus helping the driver to observe the rear situation.

[0003] The rearview mirror includes a mirror surface, which forms an angle with the length direction of the vehicle body, so as to reflect the light from the rear.

[0004] In the related art, when the vehicle turns, the rearview mirror is blocked by the vehicle body, so the range of the acquired view is limited, which is not conducive to the driver to observe the road conditions. SUMMARY

[0005] In view of this, the present application provides a rearview mirror and a control method thereof to reduce the view limitation of the driver when turning.

[0006] Specifically, the technical scheme includes the following:

[0007] The first aspect of the present application provides a rearview mirror, which includes a main lens, a housing, a secondary lens and a rotating mechanism, wherein,

[0008] The main lens is fixed to the housing.

[0009] The secondary lens is installed on the housing.

[0010] The rotating mechanism is connected in transmission with the secondary lens, for driving the secondary lens to rotate, so as to change the angle between the normal plane of the secondary lens and the initial normal plane, wherein the secondary lens is a curved lens, and the initial normal plane is the normal plane of the secondary lens in the initial position.

[0011] Optionally, the rotating mechanism includes a first linear drive assembly and a second linear drive assembly, both of which are connected with the back surface of the secondary lens, for driving the secondary lens to move in the horizontal direction respectively.

[0012] Optionally, the first linear drive assembly comprises a first motor, a first worm gear, a first worm and a first screw rod, the first motor is in transmission connection with the first worm, the outer side of the first worm gear is in meshing connection with the first worm, the inner side of the first worm gear is in threaded connection with the first screw rod, one end of the first screw rod is connected with the back surface of the secondary lens, and / or the second linear drive assembly comprises a second motor, a second worm gear, a second worm and a second screw rod, the second motor is in transmission connection with the second worm, the outer side of the second worm gear is in meshing connection with the second worm, the inner side of the second worm gear is in threaded connection with the second screw rod, one end of the second screw rod is connected with the back surface of the secondary lens.

[0013] Optionally, the rearview mirror comprises a transition lens, the transition lens is located between the primary lens and the secondary lens.

[0014] Optionally, the ratio of the area of the primary lens, the area of the transition lens and the area of the secondary lens is 9:1:5.

[0015] The second aspect of the present application provides a control method of a rearview mirror, the control method of the rearview mirror is applied to the rearview mirror as described in the above technical solution, and the control method comprises:

[0016] determining whether the automobile has a turning tendency;

[0017] if the automobile has a turning tendency, controlling the turning mechanism to change the size of the included angle according to the turning central angle;

[0018] if the automobile does not have a turning tendency, controlling the turning mechanism to be inoperative.

[0019] Optionally, the controlling the turning mechanism to change the size of the included angle according to the turning central angle specifically comprises:

[0020] determining the relative position relationship between the rearview mirror and the turning central angle.

[0021] Optionally, the controlling the turning mechanism to change the size of the included angle according to the turning central angle specifically comprises:

[0022] if the rearview mirror is located on the inner side of the turning central angle, then:

[0023] if the range of the turning central angle is 15-45°, the angle of the included angle is changed by 4°;

[0024] if the range of the turning central angle is 46-70°, the angle of the included angle is changed by 7°;

[0025] if the range of the turning central angle is 71-90°, the angle of the included angle is changed by 0°.

[0026] If the rearview mirror is located outside the turning central angle, then:

[0027] If the turning central angle ranges from 15 to 45°, the angle of the included angle changes by 4°;

[0028] If the turning central angle ranges from 46 to 70°, the angle of the included angle changes by 5°;

[0029] If the turning central angle ranges from 71 to 90°, the angle of the included angle changes by 0°.

[0030] Optionally, the determining whether the automobile has a turning tendency specifically comprises:

[0031] acquiring the speed of the automobile;

[0032] If the speed of the automobile is greater than 25km / h, it is determined that the automobile has no turning tendency;

[0033] If the speed of the automobile is less than 25km / h, it is determined that the automobile has a turning tendency.

[0034] Optionally, the determining whether the automobile has a turning tendency specifically further comprises:

[0035] acquiring the state of the turn signal;

[0036] If the turn signal is in a working state and the turning direction indicated is consistent with the turning central angle, it is determined that the automobile has a turning tendency;

[0037] If the turn signal is in a working state and the direction indicated by the turning central angle is inconsistent, and the angle of the turning central angle is greater than 15°, it is determined that the automobile has a turning tendency;

[0038] If the turn signal is not in a working state and the angle of the turning central angle is greater than 15°, it is determined that the automobile has a turning tendency.

[0039] The technical scheme provided by the embodiment has at least the following beneficial effects: the main lens and the auxiliary lens can both reflect light from the rear to the driver's eyes. The rotation mechanism drives the auxiliary lens to rotate, which is beneficial for the driver to obtain light from other directions behind through the auxiliary lens, and the main lens fixed to the shell can retain part of the light in the original position, which is beneficial for reducing the blind area of the driver when turning and reducing the visual restriction on the driver when turning. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative effort based on these drawings.

[0041] Figure 1 A structural schematic diagram of a rearview mirror provided by an embodiment of the present application;

[0042] Figure 2 A structural schematic diagram of a rotating mechanism provided by an embodiment of the present application;

[0043] Figure 3 A structural schematic diagram of a screw and a worm gear provided by an embodiment of the present application;

[0044] Figure 4 A flowchart of a control method of a rearview mirror provided by an embodiment of the present application;

[0045] Figure 5 A flowchart of controlling a rotating mechanism to change the size of an included angle according to a turning central angle provided by an embodiment of the present application;

[0046] Figure 6 A flowchart of determining whether a car has a turning tendency provided by an embodiment of the present application;

[0047] Figure 7 A schematic diagram of an included angle formed by a secondary mirror and a normal plane provided by an embodiment of the present application.

[0048] The reference signs in the drawings represent:

[0049] 1, primary mirror;

[0050] 2, housing;

[0051] 3, secondary mirror;

[0052] 4, rotating mechanism; 41, first linear drive assembly; 411, first motor; 412, first worm gear; 413, first worm; 414, first screw; 42, second linear drive assembly; 421, second motor; 422, second worm gear; 423, second worm; 424, second screw;

[0053] 5, transition mirror.

[0054] The above drawings have shown the specific embodiments of the present application, and more detailed descriptions will be given in the following. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application by any means, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of the present application.

[0056] The orientation nouns such as "upper", "lower", "lateral" and the like involved in the embodiments of the present application are generally based on the relative relationship of the orientation shown in the drawings, and these orientation nouns are only used for more clearly describing the structure and the relationship between the structures, and are not used for describing absolute orientation. When the product is placed in different postures, the orientation may change, for example, "upper" and "lower" may be interchanged. Figure 1

[0057] Unless otherwise defined, all the technical terms used in the embodiments of the present application have the same meanings as commonly understood by those of ordinary skill in the art.

[0058] To make the technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0059] The first aspect of the present application provides a rearview mirror, as shown in Figure 1 , Figure 2 and Figure 3 , the rearview mirror comprises a housing 2, a main lens 1, a secondary lens 3 and a rotating mechanism 4, wherein,

[0060] The main lens 1 is fixed to the housing 2.

[0061] The secondary lens 3 is installed on the housing 2.

[0062] The rotating mechanism 4 is in transmission connection with the secondary lens 3, and is used to drive the secondary lens 3 to rotate, so as to change the included angle between the normal plane of the secondary lens 3 and the initial normal plane. The secondary lens 3 is a curved lens, and the initial normal plane is the normal plane of the secondary lens 3 in the initial position.

[0063] It can be understood that the main lens 1 and the secondary lens 3 can both reflect the light from the rear to the eyes of the driver. The rotating mechanism 4 drives the secondary lens 3 to rotate, which is beneficial for the driver to obtain the light from other directions behind through the secondary lens 3, and the main lens 1 fixed to the housing 2 can retain part of the light in the original position, which is beneficial for reducing the blind area of the driver when turning and reducing the visual field limitation of the driver when turning.

[0064] In the embodiments of the present application, the main lens 1 and the housing 2 can be fixed by bonding or the like.​

[0065] In the embodiment of the present application, when the rearview mirror is installed on the vehicle body, the main lens 1 is closer to the vehicle body than the auxiliary lens 3, so that the auxiliary lens 3 can obtain more field of view by rotating.

[0066] In the embodiment of the present application, the housing 2 can have a connecting portion which can be connected to the vehicle body by welding, bolting or the like.

[0067] In the embodiment of the present application, the main lens 1 can be a flat lens or a lens with curvature.

[0068] In the embodiment of the present application, the initial position of the auxiliary lens 3 can refer to a position at which, when the vehicle travels in a straight line, the field of view transmitted to the driver by the auxiliary lens 3 overlaps with the field of view transmitted to the driver by the main lens 1.

[0069] In the embodiment of the present application, the vehicle can include a control module configured to control the rotating mechanism 4 to rotate according to the angle of the turn, so that the auxiliary lens 3 can reduce the field of view limitation of the driver during the turn.

[0070] In the embodiment of the present application, the auxiliary lens 3 can be a convex lens.

[0071] In the embodiment of the present application, an ultrasonic sensor can be mounted on the rearview mirror to sense that an object is gradually approaching. The main lens 1 can be arranged with a blind spot monitoring and warning system to emit light warning when the ultrasonic sensor senses that the object is too close. The rearview mirror can also integrate the buzzer of the in-vehicle voice control system to emit sound warning. Through uninterrupted detection and reminding during the entire turning process, the driver is reminded to closely observe the outside rearview mirror. This prevents potential dangers during driving from causing traffic safety accidents, and is beneficial to the driver to make deceleration or parking treatment according to the road conditions, and to complete the vehicle turning after multiple observations.

[0072] In some embodiments of the present application, as shown in Figure 2 The rotating mechanism 4 includes a first linear driving assembly 41 and a second linear driving assembly 42, both of which are connected to the back surface of the auxiliary lens 3 and configured to drive the auxiliary lens 3 to move in the horizontal direction, respectively.

[0073] It can be understood that one of the first linear driving assembly 41 and the second linear driving assembly 42 can serve as a fulcrum when the auxiliary lens 3 rotates, and the other drives the part connected to the auxiliary lens 3 to move in a straight line, thereby realizing the rotation of the auxiliary lens 3.

[0074] In the embodiments of the present application, the auxiliary lens 3 can be driven by the first linear drive assembly 41 to move towards and away from the housing 2, and in cooperation with the second linear drive assembly 42 to realize the rotation of the auxiliary lens 3.

[0075] In the embodiments of the present application, the auxiliary lens 3 can be driven by the second linear drive assembly 42 to move towards and away from the housing 2, and in cooperation with the first linear drive assembly 41 to realize the rotation of the auxiliary lens 3.

[0076] In some embodiments of the present application, as shown in Figure 2 The first linear drive assembly 41 includes a first motor 411, a first worm wheel 412, a first worm 413 and a first screw 414. The first motor 411 is connected in transmission with the first worm 413. The outer side of the first worm wheel 412 is engaged with the first worm 413. The inner side of the first worm wheel 412 is threadedly connected with the first screw 414. One end of the first screw 414 is connected with the back of the auxiliary lens 3.

[0077] In the embodiments of the present application, the first motor 411 can drive the first worm 413 to rotate, and in turn drive the first worm wheel 412 to rotate, so that the first screw 414 can move in the horizontal direction relative to the first worm wheel 412, thus realizing the linear driving of the auxiliary lens 3. Specifically, the first motor 411 drives the first worm 413 to rotate around its axis, so that the worm wheel engaged with the first worm 413 can rotate around its axis. The first screw 414 is threadedly connected with the first worm wheel 412. The rotation of the first worm wheel 412 changes the position of the first screw 414. The first worm wheel 412 generally has only the freedom of rotation around its axis to realize the engagement with the first worm 413. Therefore, the first screw 414 moves in the linear direction under the driving of the first worm wheel 412, thus driving the auxiliary lens 3 to move.

[0078] In the embodiments of the present application, the first screw 414 and the back of the auxiliary lens 3 are connected through a ball head support, so that the first screw 414 can drive the auxiliary lens 3 to move in the horizontal direction, and can rotate around the second linear drive assembly 42, or the second linear drive assembly 42 can rotate as the fulcrum of the auxiliary lens 3 when driving the auxiliary lens 3 to move in the horizontal direction.

[0079] In some embodiments of the present application, as shown in Figure 2 The second linear drive assembly 42 includes a second motor 421, a second worm wheel 422, a second worm 423 and a second screw 424. The second motor 421 is connected in transmission with the second worm 423. The outer side of the second worm wheel 422 is engaged with the second worm 423. The inner side of the second worm wheel 422 is threadedly connected with the second screw 424. One end of the second screw 424 is connected with the back of the auxiliary lens 3.

[0080] In the embodiment of the present application, the second motor 421 can drive the second worm 423 to rotate, and further drive the second worm wheel 422 to rotate, so that the second screw rod 424 can generate movement along the horizontal direction relative to the second worm wheel 422, thus realizing the driving effect of the auxiliary lens 3 along the linear direction. Specifically, the second motor 421 drives the second worm 423 to rotate around its axis, so that the worm wheel engaged with the second worm 423 can rotate around its axis, and the second screw rod 424 is connected with the second worm wheel 422 through thread connection, and the rotating second worm wheel 422 changes the screwing position of the second screw rod 424, and the second worm wheel 422 generally only has the degree of freedom around its axis to realize the engagement with the second worm 423, so that the second screw rod 424 moves along the linear direction under the driving of the second worm wheel 422, thus driving the auxiliary lens 3 to move.

[0081] In the embodiment of the present application, the second screw rod 424 and the back surface of the auxiliary lens 3 are connected through the ball head support, so that the second screw rod 424 can rotate around the first linear driving assembly 41 when driving the auxiliary lens 3 to move along the horizontal direction, or the first linear driving assembly 41 can rotate as the fulcrum of the auxiliary lens 3 when driving the auxiliary lens 3 to move along the horizontal direction.

[0082] In some embodiments of the present application, as shown in Figure 2 The first linear driving assembly 41 includes a first motor 411, a first worm wheel 412, a first worm 413 and a first screw rod 414, the first motor 411 is drivingly connected with the first worm 413, the outer side of the first worm wheel 412 is engaged with the first worm 413, the inner side of the first worm wheel 412 is threadedly connected with the first screw rod 414, one end of the first screw rod 414 is connected with the back surface of the auxiliary lens 3, and the second linear driving assembly 42 includes a second motor 421, a second worm wheel 422, a second worm 423 and a second screw rod 424, the second motor 421 is drivingly connected with the second worm 423, the outer side of the second worm wheel 422 is engaged with the second worm 423, the inner side of the second worm wheel 422 is threadedly connected with the second screw rod 424, and one end of the second screw rod 424 is connected with the back surface of the auxiliary lens 3.

[0083] In the embodiment of the present application, the position of the first screw rod 414 connected with the back surface of the auxiliary lens 3 and the position of the second screw rod 424 connected with the back surface of the auxiliary lens 3 can be on the same horizontal plane, or can not be on the same horizontal plane.

[0084] In some embodiments of the present application, the rearview mirror includes a transition lens 5, and the transition lens 5 is located between the main lens 1 and the auxiliary lens 3.

[0085] It can be understood that the transition lens 5 can transition the fields of view of the main lens 1 and the auxiliary lens 3, so that the fields of view displayed by the rearview mirror have continuity, to reduce the interference caused by the difference between the fields of view of the main lens 1 and the auxiliary lens 3 to the driver.

[0086] In the embodiments of the present application, one side of the transition lens 5 is connected with the auxiliary lens 3, and the other side is connected with the main lens 1, and the two sides are opposite sides. In this way, the auxiliary lens 3 can drive the auxiliary lens 3 to elastically deform when rotating, so as to facilitate reducing the interference caused by the difference between the fields of view of the main lens 1 and the auxiliary lens 3.

[0087] In some embodiments of the present application, the ratio of the area of the main lens 1, the area of the transition lens 5 and the area of the auxiliary lens 3 is 9:1:5.

[0088] It can be understood that the main lens 1 is fixed on the rearview mirror to provide the driver with the main field of view, and has a large area to facilitate the driver to obtain a stable rear field of view. The transition lens 5 has the smallest area because it has a transition function. The auxiliary lens 3 has an area larger than that of the transition lens 5 and smaller than that of the main lens 1 because it has a function of adjusting the field of view of the driver. In order to maintain the normal function of the rearview mirror, the area of the main lens 1 is greater than half of the sum of the areas of the three.

[0089] In the embodiments of the present application, the housing 2 has an opening for supporting the main lens 1, the transition lens 5 and the auxiliary lens 3, and the sum of the area of the main lens 1, the area of the transition lens 5 and the area of the auxiliary lens 3 is equal to the area of the opening.

[0090] The second aspect of the present application provides a control method of a rearview mirror, as shown in the embodiments of the present application, the control method of the rearview mirror comprises the following steps: Figure 4

[0091] 100: determining whether the car has a turning tendency;

[0092] 201: if the car has a turning tendency, controlling the rotation mechanism 4 to change the size of the included angle according to the turning central angle;

[0093] 202: if the car does not have a turning tendency, controlling the rotation mechanism 4 to be inoperative.

[0094] It can be understood that when the car is turning, the field of view of the driver behind the car is blocked by the B-pillar and other vehicle body structures. At this time, the rotation mechanism 4 is controlled to change the included angle of the auxiliary lens 3, so that the personnel and objects that were originally blocked can be observed by the driver, thereby reducing the restriction of the field of view on the driver.

[0095] In the embodiments of the present application, the turning central angle can refer to the included angle formed in the length direction of the vehicle body before and after the car turns.

[0096] ​In the embodiments of the present application, the turning circle central angle can be obtained by the rotation angle of the steering wheel. For example, the steering wheel is rotated by 180°, and the turning circle central angle is 90°.

[0097] In some embodiments of the present application, the size of the included angle is changed by the rotation mechanism 4 according to the turning circle central angle, specifically including:

[0098] 2011: determining the relative position relationship between the rearview mirror and the turning circle central angle.

[0099] It can be understood that the shielding conditions of the rearview mirror are different when the rearview mirror is located on the inside and outside of the turning circle central angle. Determining the position relationship between the rearview mirror and the turning circle central angle is beneficial to providing more suitable adjustment of the driving of the sub-mirror 3 by the rotation mechanism 4, so that the visual limitation of the driver can be reduced.

[0100] In some embodiments of the present application, as shown in Figure 5 and Figure 7 , the size of the included angle is changed by the rotation mechanism 4 according to the turning circle central angle, specifically including:

[0101] 2012: if the rearview mirror is located on the inside of the turning circle central angle, then:

[0102] If the range of the turning circle central angle is 15-45°, the angle of the included angle is changed by 4°;

[0103] If the range of the turning circle central angle is 46-70°, the angle of the included angle is changed by 7°;

[0104] If the range of the turning circle central angle is 71-90°, the angle of the included angle is changed by 0°;

[0105] 2013: if the rearview mirror is located on the outside of the turning circle central angle, then:

[0106] If the range of the turning circle central angle is 15-45°, the angle of the included angle is changed by 4°;

[0107] If the range of the turning circle central angle is 46-70°, the angle of the included angle is changed by 5°;

[0108] If the range of the turning circle central angle is 71-90°, the angle of the included angle is changed by 0°.

[0109] It can be understood that within the above value range, the driver can obtain a relatively suitable field of view when turning, and the shielding effect of the vehicle body on the driver's line of sight can be reduced.

[0110] In some embodiments of the present application, as shown in Figure 6 , it is determined whether the vehicle has a turning tendency, specifically including:

[0111] 101: obtaining the speed of the vehicle;

[0112] 102: if the speed of the vehicle is greater than 25km / h, it is determined that the vehicle has no turning tendency;

[0113] 103: if the speed of the vehicle is less than 25km / h, it is determined that the vehicle has a turning tendency.

[0114] It can be understood that when the speed is ≤25km / h, the adaptive adjustment of the outside rearview mirror starts to follow the turning driving of the vehicle, which can help the driver to expand the field of view when turning. When the speed is >25km / h, the vehicle is in a high-speed state, and long-time observation of the rearview mirror does not comply with the traffic safety regulations, so it is meaningless to provide adaptive adjustment of the outside rearview mirror.

[0115] In some embodiments of the present application, determining whether the vehicle has a turning tendency further comprises:

[0116] acquiring the state of the turn signal;

[0117] if the turn signal is in the working state and the turning direction indicated is consistent with the turning central angle, it is determined that the vehicle has a turning tendency;

[0118] if the turn signal is in the working state and the direction indicated by the turning central angle is inconsistent, and the angle of the turning central angle is greater than 15°, it is determined that the vehicle has a turning tendency;

[0119] if the turn signal is not in the working state, and the angle of the turning central angle is greater than 15°, it is determined that the vehicle has a turning tendency.

[0120] It can be understood that the turn signal, as a component for indicating the turning direction, its working state can be used to judge whether the driver has the idea of turning the steering wheel. By judging the working state of the turn signal, the working accuracy of the turning mechanism 4 can be improved. In addition, in order to reduce the situation that the driver mistakenly touches the turn signal and causes the method to misjudge, the judgment of the turning central angle is added, which is conducive to improving the working accuracy of the turning mechanism 4.

[0121] In the present application, the terms "main" and "secondary" are used for descriptive purposes only and should not be construed to indicate or imply relative importance. The term "a plurality" means two or more, unless otherwise expressly specified.

[0122] Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the present application cover any and all variations of the application that come within the scope of the general inventive concepts described herein and including all such variations that are within the scope of the appended claims along with modifications not presently unforeseeable. The specification and examples are to be construed as merely illustrative of preferred embodiments of the present application.

[0123] It is to be understood that the application is not limited to the precise construction already described above and shown in the drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application should only be limited by the claims appended hereto.

Claims

1. A method for controlling a rearview mirror, characterized in that, The rearview mirror includes a main lens (1), a housing (2), a secondary lens (3), and a rotating mechanism (4), wherein the control method includes: Get the status of the turn signals; If the turn signal is active and the indicated turning direction is consistent with the turning center angle, then it is determined that the vehicle has a turning tendency. If the turn signal is active and the indicated turning direction is inconsistent with the turning center angle, and the turning center angle is greater than 15°, then it is determined that the vehicle has a turning tendency. If the turn signal is not in operation and the turning center angle is greater than 15°, then the vehicle is determined to have a turning tendency. If the car has a turning tendency, the rotating mechanism (4) is controlled according to the turning center angle to change the size of the angle formed by the normal plane of the secondary mirror (3) and the initial normal plane, to determine the relative position relationship between the rearview mirror and the turning center angle, to determine whether the rearview mirror is located inside or outside the turning center angle, and to adjust the size of the angle according to the range of the turning center angle. If the vehicle does not have a turning tendency, the control mechanism (4) will not work.

2. The rearview mirror control method according to claim 1, characterized in that, The step of controlling the rotation mechanism (4) to change the included angle based on the turning center angle specifically includes: If the rearview mirror is located inside the central angle of the turn, then: If the range of the central angle of the turning circle is 15 to 45°, then the included angle changes by 4°; If the range of the central angle of the turning circle is 46 to 70°, then the included angle changes by 7°; If the range of the central angle of the turning circle is 71 to 90°, then the angle of the included angle changes by 0°. If the rearview mirror is located outside the central corner of the turn, then: If the range of the central angle of the turning circle is 15 to 45°, then the included angle changes by 4°; If the range of the central angle of the turning circle is 46 to 70°, then the included angle changes by 5°; If the range of the central angle of the turning circle is 71 to 90°, then the angle of the included angle changes by 0°.

3. The rearview mirror control method according to claim 1, characterized in that, Determining whether a car has a tendency to turn specifically includes: Obtain the vehicle speed; If the vehicle speed is greater than 25 km / h, it is determined that the vehicle has no tendency to turn. If the vehicle speed is less than 25 km / h, it is determined that the vehicle has a tendency to turn.

4. The rearview mirror control method according to claim 1, characterized in that, The main lens (1) is fixed to the housing (2); The secondary lens (3) is mounted on the housing (2); The rotating mechanism (4) is connected to the sub-lens (3) for driving the sub-lens (3) to rotate in order to change the included angle. The sub-lens (3) is a curvature lens, and the initial normal plane is the normal plane of the sub-lens (3) in its initial position.

5. The rearview mirror control method according to claim 1, characterized in that, The rotating mechanism (4) includes a first linear drive assembly (41) and a second linear drive assembly (42). Both the first linear drive assembly (41) and the second linear drive assembly (42) are connected to the back of the sub-lens (3) and are used to drive the sub-lens (3) to move in the horizontal direction, respectively.

6. The rearview mirror control method according to claim 5, characterized in that, The first linear drive assembly (41) includes a first motor (411), a first worm gear (412), a first worm (413), and a first screw (414). The first motor (411) is connected to the first worm (413) for transmission. The outer side of the first worm gear (412) meshes with the first worm (413), and the inner side of the first worm gear (412) is threadedly connected to the first screw (414). One end of the first screw (414) is connected to the back surface of the secondary lens (3). And / or, The second linear drive assembly (42) includes a second motor (421), a second worm gear (422), a second worm (423), and a second screw (424). The second motor (421) is connected to the second worm (423) in a transmission. The outer side of the second worm gear (422) meshes with the second worm (423). The inner side of the second worm gear (422) is threadedly connected to the second screw (424). One end of the second screw (424) is connected to the back of the sub-lens (3).

7. The rearview mirror control method according to claim 1, characterized in that, The rearview mirror includes a transition lens (5) located between the main lens (1) and the secondary lens (3).

8. The rearview mirror control method according to claim 7, characterized in that, The ratio of the area of ​​the main lens (1), the area of ​​the transition lens (5), and the area of ​​the sub-lens (3) is 9:1:5.

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