Naked eye 3D projection device

Abstract

The embodiment of the utility model relates to the technical field of projection equipment, in particular to a naked-eye 3D projection device which comprises an optical machine, a control unit, an actuating mechanism and a reflector. The light machine is used for emitting first time sequence image light and second time sequence image light according to a control instruction of the control unit, the first time sequence image light corresponds to the left eye of a viewer, and the second time sequence image light corresponds to the right eye of the viewer; a viewer forms a visual effect of watching a 3D image through the first time sequence image light and the second time sequence image light which enter the left eye and the right eye of the viewer; the actuating mechanism is connected to the reflecting mirror, and the reflecting mirror is used for rotating under the driving of the actuating mechanism so as to reflect the first time sequence image light and the second time sequence image light to the left eye and the right eye of a viewer respectively; the optical machine and the actuating mechanism are electrically connected to the control unit. The naked-eye 3D projection device has the advantages of small number of ray machines, small weight, small size and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of projection equipment, in particular to a naked-eye 3D projection device. BACKGROUND

[0002] With the rapid development of current science and technology, the traditional two-dimensional plane display technology has been far unable to meet the needs of the current industry for depth data and spatial information perception. More and more application fields, such as remote conference, intelligent seat, medical imaging, etc., hope to realize the reconstruction of 3D scene. The naked-eye 3D display technology does not need to use additional glasses to realize 3D function, so it is widely favored.

[0003] The naked-eye 3D display technology can be divided into binocular parallax 3D display, spatial light field 3D display and holographic 3D display. A large part of the information of human eye perception depth depends on binocular parallax. When observing an object, the object falls on the different positions of the left and right eyes, and the imaging difference of the left and right eyes is a clue for the human eye to judge the depth. Binocular parallax 3D display is to use this principle to make the left and right eyes receive different images. The imaging difference clue of the left and right eyes will make people perceive a virtual three-dimensional composite image. Due to the position of human eye focusing and the position of perceived three-dimensional object (binocular accommodation position) not in the same plane, there is a problem of vergence conflict.

[0004] For binocular parallax 3D display, one projection light machine represents one viewpoint information. If the human eye in a certain eyebox range can observe the information corresponding to the viewing angle, it is required that the number of projection light machines is sufficient. In addition, to ensure the smoothness of viewpoint switching when the human eye moves in the eyebox, it is also required that the number of projection light machines is sufficient. Both of the above require a large number of projection light machines. Specifically, in the naked-eye 3D projection system, a single projection light machine can only emit time sequence image light to one eye of the viewer to form a viewpoint information. In order to form the visual effect of naked-eye 3D, viewpoint information must be formed at both eyes of the viewer, so the projection light machines must be arranged in pairs and multiple pairs. However, the increase in the number of projection light machines will inevitably lead to the increase in the volume, weight, complexity and cost of the entire projection system, so the above problems need to be solved. CONTENT OF THE UTILITY MODEL

[0005] The embodiment of the present application provides a naked eye 3D projection device which is used for providing a visual effect of watching a 3D image to a viewer, and the naked eye 3D projection device comprises a light machine and a control unit; the light machine is used for emitting first time sequence image light and second time sequence image light according to a control instruction of the control unit, wherein the first time sequence image light corresponds to a left eye of the viewer, and the second time sequence image light corresponds to a right eye of the viewer; the viewer forms the visual effect of watching the 3D image through the first time sequence image light and the second time sequence image light which are emitted into the left eye and the right eye of the viewer; the naked eye 3D projection device further comprises an actuating mechanism and a mirror; the actuating mechanism is connected to the mirror, and the mirror is used for rotating under the driving of the actuating mechanism, so as to reflect the first time sequence image light and the second time sequence image light to the left eye and the right eye of the viewer respectively; the light machine and the actuating mechanism are electrically connected to the control unit respectively; in the case that the light machine emits the first time sequence image light, the actuating mechanism is used for driving the mirror to rotate to a first position under the control of the control unit, so as to reflect the first time sequence image light to the left eye of the viewer; in the case that the light machine emits the second time sequence image light, the actuating mechanism is used for driving the mirror to rotate to a second position under the control of the control unit, so as to reflect the second time sequence image light to the right eye of the viewer.

[0006] Optionally, in some embodiments, the actuating mechanism comprises a base, an actuating component and a magnet; the actuating component is arranged on the base and connected to the mirror, and the magnet is fixedly arranged on the base; the actuating component is used for generating a magnetic field after being energized, so as to drive the mirror to rotate under the magnetic force in cooperation with the magnet.

[0007] Optionally, in some embodiments, the base has a containing groove which is arranged on a mounting plane; at least part of the structure of the actuating component is located in the containing groove, and at least part of the structure of the actuating component is located outside the containing groove and connected to the mirror, so that the mirror is suspended; the mirror is located outside the containing groove and arranged opposite to the opening of the containing groove; in the case that the mirror rotates, the containing groove is used for containing the mirror.

[0008] Optionally, in some embodiments, the mirror has opposite first and second sides, and the rotation axis of the mirror is located between the first and second sides; the magnet is provided with two magnets which are arranged opposite to the first and second sides respectively; the actuating component comprises a flexible circuit board, a spring and a coil; the flexible circuit board is arranged on the base, and the flexible circuit board is provided with a positive electrode contact and a negative electrode contact; the spring is arranged on the base, and the spring is provided with two springs which are electrically connected to the positive electrode contact and the negative electrode contact respectively, and the two springs are connected to the mirror; the coil is connected between the two springs, and the coil and the two springs jointly support the mirror so that the mirror is suspended; the coil is connected in series between the two springs, and the coil is located between the two magnets.

[0009] Optionally, in some embodiments, the elastic sheet comprises a first mounting portion, a connecting portion and a second mounting portion; the first mounting portion is arranged on the mounting plane, the second mounting portion is connected to the mirror, and the connecting portion is connected between the first mounting portion and the second mounting portion and extends along the rotation axis of the mirror.

[0010] Optionally, in some embodiments, the actuating assembly further comprises a positioning bolt, the positioning bolt is arranged in the first mounting portion and is screwed into the base, and the positioning bolt presses the first mounting portion against the mounting plane.

[0011] Optionally, in some embodiments, the coil is connected to the side of the second mounting portion away from the mirror, and the coil is connected to the second mounting portions of the two elastic sheets.

[0012] Optionally, in some embodiments, the actuating assembly further comprises a positive electrode lead and a negative electrode lead; one end of the positive electrode lead is electrically connected to the positive electrode contact, and the other end of the positive electrode lead is electrically connected to one of the elastic sheets; one end of the negative electrode lead is electrically connected to the negative electrode contact, and the other end of the negative electrode lead is electrically connected to the other elastic sheet.

[0013] Optionally, in some embodiments, the base is provided with a receiving hole in communication with the receiving groove, the flexible circuit board is arranged in the receiving hole, a part of the structure of the flexible circuit board is located in the receiving groove, and the other part of the structure of the flexible circuit board is located outside the receiving groove, and the positive electrode contact and the negative electrode contact are located outside the receiving groove.

[0014] Optionally, in some embodiments, the number of mirrors is multiple, the multiple mirrors are arranged in the same horizontal plane in a specified direction, and the actuating mechanism is arranged on each mirror, and the actuating mechanism is used to drive the rotation of a single mirror to reflect the first time sequence image light and the second time sequence image light to the left eye and the right eye of the viewer, respectively.

[0015] When the naked-eye 3D projection device provided by the embodiments of the present application works, the light machine emits the first time sequence image light and the second time sequence image light to the mirror according to the control instruction issued by the control unit, under the control of the control unit, the actuating mechanism drives the mirror to rotate to the first position when the light machine emits the first time sequence image light, so as to reflect the first time sequence image light to the left eye of the viewer; under the control of the control unit, the actuating mechanism drives the mirror to rotate to the second position when the light machine emits the second time sequence image light, so as to reflect the second time sequence image light to the right eye of the viewer; the viewer forms the visual effect of watching the 3D image through the first time sequence image light and the second time sequence image light entering the left eye and the right eye.

[0016] In summary, the naked eye 3D projection device can reflect the first time sequence image light and the second time sequence image light emitted by the light machine to the left eye and the right eye of the viewer respectively by setting the actuating mechanism on the mirror to drive the mirror to rotate between the first position and the second position, thereby providing the viewer with the visual effect of viewing 3D images. The naked eye 3D projection device can emit the first time sequence image light and the second time sequence image light to the left eye and the right eye of the viewer respectively by one light machine, thereby providing the viewer with the visual effect of viewing 3D images, so that the number of light machines can be reduced, and the naked eye 3D projection device has the beneficial effects of simple structure, small size, light weight and low cost. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the present application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0018] Figure 1 is a structural schematic diagram of the naked eye 3D projection device in some embodiments of the present application.

[0019] Figure 2 is a structural schematic diagram of the naked eye 3D projection device in some embodiments of the present application. Figure 1 is a three-dimensional structural schematic diagram of the mirror and the actuating mechanism in the naked eye 3D projection device shown in

[0020] Figure 3 is a sectional view of the structure shown in Figure 2

[0021] Figure 4 is a structural schematic diagram of the spring piece shown in Figure 2

[0022] Figure 5 is a structural schematic diagram of the naked eye 3D projection device in some embodiments of the present application.

[0023] Label explanation: 100, naked eye 3D projection device; 10, light machine; 20, mirror; 21, first side; 22, second side; 30, actuating mechanism; 31, base; 311, mounting plane; 312, accommodating groove; 313, accommodating hole; 32, actuating assembly; 321, flexible circuit board; 322, spring piece; 3221, first mounting part; 3222, connecting part; 3223, second mounting part; 323, coil; 324, positioning bolt; 33, magnet. DETAILED DESCRIPTION

[0024] ​​To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort are within the scope of protection of the present application.

[0025] In the description of this application, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or state relationship based on the orientation or state relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation.

[0026] Furthermore, in addition to indicating location or state relationships, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in certain situations to indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0027] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] Furthermore, unless otherwise explicitly specified or limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or merely surface contact. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] As used in the specification and claims, certain terminology is used to refer to certain features. One of skill in the art will appreciate that hardware manufacturers can use different names to refer to the same feature. The specification and claims do not differentiate among different names for the same feature, but rather differentiate among features that serve the same function. As used throughout the specification and claims, "includes" is an open term, and therefore is to be interpreted to cover "includes, but is not limited to" and "includes at least"; "substantially" is to be interpreted as within a margin of error, and therefore within a range that one of skill in the art would consider to be a technical effect.

[0030] Referring to Figure 1 , Figure 2 and Figure 3 , the present application provides a naked eye 3D projection device 100, which is applied to a naked eye 3D display device to provide a visual effect of watching 3D images for a user. The naked eye 3D projection device 100 comprises a light machine 10 and a control unit.

[0031] The light machine 10 is used to emit first time sequence image light and second time sequence image light according to a control instruction of the control unit, wherein the first time sequence image light corresponds to a left eye of a viewer, and the second time sequence image light corresponds to a right eye of the viewer. The viewer forms the visual effect of watching 3D images through the first time sequence image light and the second time sequence image light entering the left and right eyes.

[0032] The naked eye 3D projection device 100 further comprises an actuating mechanism 30 and a mirror 20.

[0033] The actuating mechanism 30 is connected to the mirror 20, and the mirror 20 is used to rotate under the driving of the actuating mechanism 30 to reflect the first time sequence image light and the second time sequence image light to the left eye and the right eye of the viewer, respectively.

[0034] The light machine 10 and the actuating mechanism 30 are electrically connected to the control unit. When the light machine 10 emits the first time sequence image light, the actuating mechanism 30 is used to drive the mirror 20 to rotate to a first position under the control of the control unit to reflect the first time sequence image light to the left eye of the viewer; when the light machine 10 emits the second time sequence image light, the actuating mechanism 30 is used to drive the mirror 20 to rotate to a second position under the control of the control unit to reflect the second time sequence image light to the right eye of the viewer.

[0035] It should be understood that based on the naked eye 3D projection device 100 provided in the present application, the actuating mechanism 30 drives the mirror 20 to rotate, so as to reflect the first time sequence image light and the second time sequence image light emitted by the light machine 10 to the left eye and the right eye of the viewer respectively, thereby providing the viewer with the visual effect of naked eye 3D. The computer program involved in the movement of the actuating mechanism 30 and the mirror 20 in the above-mentioned embodiment of the present application, such as "the light machine 10 is used for emitting the first time sequence image light and the second time sequence image light according to the control instruction of the control unit", is a common technology in the naked eye 3D projection technology, and the present application does not involve this improvement. The present application utilizes the time-sharing emission image light technology, and improves the hardware of the naked eye 3D projection device 100, and proposes a new actuating mechanism 30 and mirror 20, so that the actuating mechanism 30 and the mirror 20 can realize the display effect of naked eye 3D by using the time-sharing emission image light technology. Specifically, in the present application, for example, "when the light machine 10 emits the first time sequence image light, the control unit controls the actuating mechanism 30 to drive the mirror 20 to rotate to the first position", "when the light machine 10 emits the second time sequence image light, the control unit controls the actuating mechanism 30 to drive the mirror 20 to rotate to the second position", the control technology of the control unit involved is a common control technology in the projection display of different time sequence image light in the field, for example, the control of the rotating color wheel in the prior art is also the linkage control according to the rotation angle of the color wheel and the different time sequence image light, which belongs to the technology that the person skilled in the art can know and apply based on the improvement of the structure of the actuating mechanism 30 and the mirror 20 provided in the embodiment of the present application.

[0036] When the above-mentioned naked eye 3D projection device 100 works, the light machine 10 emits the first time sequence image light and the second time sequence image light to the mirror 20 according to the control instruction of the control unit, when the light machine 10 emits the first time sequence image light, the actuating mechanism 30 drives the mirror 20 to rotate to the first position under the control of the control unit, so as to reflect the first time sequence image light to the left eye of the viewer; when the light machine 10 emits the second time sequence image light, the actuating mechanism 30 drives the mirror 20 to rotate to the second position under the control of the control unit, so as to reflect the second time sequence image light to the right eye of the viewer; the viewer forms the visual effect of watching 3D image through the first time sequence image light and the second time sequence image light entering the left and right eyes.

[0037] In summary, the naked eye 3D projection device drives the mirror 20 to rotate between the first position and the second position by setting the actuating structure 30 on the mirror 20, and can reflect the first time sequence image light and the second time sequence image light emitted by the light machine 10 to the left and right eyes of the viewer respectively, thereby providing the viewer with the visual effect of viewing 3D images. The naked eye 3D projection device can emit the first time sequence image light and the second time sequence image light to the left and right eyes of the viewer respectively by one light machine 10, thereby providing the viewer with the visual effect of viewing 3D images, and thus the number of light machines can be reduced, and the naked eye 3D projection device has the beneficial effects of simple structure, small size, light weight, and low cost.

[0038] Referring to Figure 2 and Figure 3 In some embodiments, the actuating mechanism 30 includes a base 31, an actuating assembly 32, and a magnet 33. The base 31 is the main frame of the actuating mechanism 30, and as a specific example, the base 31 is substantially cuboid-shaped in this embodiment, and in other embodiments, the base 31 can also be square-shaped, cylindrical, or any other shape. The actuating assembly 32 is arranged on the base 31 and connected to the mirror 20, and the magnet 33 is fixedly arranged on the base 31. The actuating assembly 32 is used to generate a magnetic field after being powered on, so as to drive the mirror 20 to rotate under the action of the magnetic force in cooperation with the magnet 33.

[0039] Through the above arrangement, the actuating assembly 32 and the magnet 33 can drive the mirror 20 to rotate through magnetic force cooperation after being powered on, and the magnetic force between the actuating assembly 32 and the magnet 33 can be changed by controlling the current intensity flowing through the actuating assembly 32, that is, the flip angle of the mirror 20 can be adjusted, which is simple in structure and convenient to operate.

[0040] In some embodiments, the base 31 has a mounting plane 311, and the mounting plane 311 is a plane of the base 31. The base 31 has a receiving groove 312 arranged on the mounting plane 311, and the receiving groove 312 provides space for the rotation of the actuating assembly 32 and the mirror 20. At least part of the structure of the actuating assembly 32 is located in the receiving groove 312, and at least part of the structure of the actuating assembly 32 is located outside the receiving groove 312 and connected to the mirror 20, so that the mirror 20 is suspended. The mirror 20 is located outside the receiving groove 312 and arranged opposite to the opening of the receiving groove 312. In the case of rotation of the mirror 20, the receiving groove 312 is used to accommodate the mirror 20.

[0041] With the above arrangement, the accommodation groove 312 provides mounting space for the actuating assembly 32 since at least part of the structure of the actuating assembly 32 is located in the accommodation groove 312. The accommodation groove 312 provides space for the rotation of the mirror 20 since at least part of the structure of the mirror 20 moves into the accommodation groove 312 when the mirror 20 rotates. The arrangement of the accommodation groove 312 enables the actuating assembly 32 to have sufficient mounting space and the actuating assembly 32 to drive the mirror 20 to rotate smoothly.

[0042] In some embodiments, the mirror 20 has opposite first and second sides 21 and 22, and the rotation axis O of the mirror 20 is located between the first and second sides 21 and 22. The rotation axis O represents the axis around which the mirror 20 rotates, i.e., the mirror 20 rotates about the rotation axis O. As a specific example, in the present embodiment, the rotation axis O of the mirror 20 is located substantially at the center of the first and second sides 21 and 22. In other embodiments, the rotation axis O of the mirror 20 can be closer to the first side 21 or closer to the second side 22, and the specific position of the rotation axis O is not limited.

[0043] The magnets 33 are provided in two, and the two magnets 33 are arranged opposite to the first and second sides 21 and 22, respectively. As a specific example, in the present embodiment, the magnets 33 are substantially cuboid, and in other embodiments, the magnets 33 can be in any shape such as a cylinder or a cube, and the specific shape of the magnets 33 is not limited.

[0044] The actuating assembly 32 includes a flexible circuit board 321, a spring 322, and a coil 323. The flexible circuit board 321 is substantially plate-shaped, and is arranged on the base 31. The flexible circuit board 321 is provided with a positive contact and a negative contact (not shown in the figure). The positive contact is used to connect the positive pole of a power supply, and the negative contact is used to connect the negative pole of the power supply. The spring 322 is a conductor, and is arranged on the base 31. The spring 322 is provided in two, and the two springs 322 are electrically connected to the positive and negative contacts, respectively. The two springs 322 are connected to the mirror 20. The coil 323 is connected between the two springs 322, and the coil 323 and the two springs 322 together support the mirror 20 to make the mirror 20 suspended. The coil 323 is connected in series between the two springs 322, and the coil 323 is located between the two magnets 33. The coil 323 is an external coil 323 electrically connected to the flexible circuit board 321, such as a copper wire coil 323 or an aluminum wire coil 323.

[0045] By the above arrangement, since the elastic sheet 322 is arranged on the base 31, the coil 323 is connected between the two elastic sheets 322, and the coil 323 and the two elastic sheets 322 jointly support the mirror 20 to make the mirror 20 suspended, thus achieving the suspended arrangement of the mirror 20 so that the mirror 20 rotates. When the actuating assembly 32 works, the flexible circuit board 321 needs to be electrically connected with the power supply, specifically, the positive contact of the flexible circuit board 321 is electrically connected with the positive pole of the power supply, and the negative contact of the flexible circuit board 321 is electrically connected with the negative pole of the power supply. Since the coil 323 is connected in series between the two elastic sheets 322, and the two elastic sheets 322 are respectively electrically connected with the positive contact and the negative contact, thus the power supply can supply power to the coil 323 to generate a magnetic field around the coil 323, and the magnetic field generated by the coil 323 and the magnetic force generated by the magnet 33 drive the mirror 20 to rotate around the rotation axis O as the rotation shaft.

[0046] Please refer to Figure 3 and Figure 4 In some embodiments, the base 31 is provided with a receiving hole 313 communicating with the receiving groove 312, and the flexible circuit board 321 is arranged through the receiving hole 313. For example, the receiving hole 313 can be arranged on the vertical side wall of the base 31. Part of the structure of the flexible circuit board 321 is located in the receiving groove 312, and the other part of the structure is located outside the receiving groove 312, and the positive contact and the negative contact are located outside the receiving groove 312.

[0047] By the above arrangement, the base 31 does not need to completely accommodate the flexible circuit board 321, thus being beneficial to reduce the volume of the base 31, and thus being beneficial to reduce the overall volume of the naked-eye 3D projection device 100. Moreover, since the positive contact and the negative contact are exposed outside the base 31, it is convenient to electrically connect the positive contact, the negative contact and the power supply, thus reducing the installation difficulty.

[0048] In some embodiments, the elastic sheet 322 comprises a first mounting portion 3221, a connecting portion 3222, and a second mounting portion 3223. The first mounting portion 3221 is arranged on the mounting plane 311, the second mounting portion 3223 is connected to the mirror 20, and the connecting portion 3222 is connected between the first mounting portion 3221 and the second mounting portion 3223 and extends along the rotation axis O of the mirror 20. It should be noted that the first mounting portion 3221, the connecting portion 3222, and the second mounting portion 3223 are at least partial structures of the elastic sheet 322. In the present embodiment, the first mounting portion 3221, the connecting portion 3222, and the second mounting portion 3223 are integrally formed to constitute the elastic sheet 322 and there is no obvious boundary between adjacent two portions. In other embodiments, the first mounting portion 3221, the connecting portion 3222, and the second mounting portion 3223 can also be independent structures, there can be an obvious boundary between adjacent two portions, and the adjacent two portions can be connected by bonding or through a connecting member.

[0049] Through the above arrangement, since the connecting portion 3222 extends along the rotation axis O of the mirror 20, the connecting portion 3222 is substantially in a strip shape. When the actuating mechanism 30 drives the mirror 20 to rotate, the mirror 20 will rotate along the extension direction of the connecting portion 3222 (i.e., the rotation axis O), thereby reducing the resistance to the rotation of the mirror 20 and making the rotation of the mirror 20 more smooth and easy.

[0050] In some embodiments, the actuating assembly 32 further comprises a positioning bolt 324, which is arranged through the first mounting portion 3221 and is screwed into the base 31, and the positioning bolt 324 presses the first mounting portion 3221 against the mounting plane 311. The positioning bolt 324 is used to achieve the fixed connection between the elastic sheet 322 and the base 31, and facilitates the staff to fix and install the elastic sheet 322 on the mounting plane 311 and to disassemble the elastic sheet 322 from the mounting plane 311.

[0051] In some embodiments, the coil 323 is connected to the side of the second mounting portion 3223 away from the mirror 20, and the coil 323 is connected to the second mounting portion 3223 of two elastic sheets 322 at the same time. Through the above arrangement, the connection of the coil 323 to the two elastic sheets 322 at the same time enables the overall structure composed of the coil 323 and the elastic sheet 322 to support the mirror 20 to make the mirror 20 suspended, and does not hinder the rotation of the mirror 20.

[0052] In some embodiments, the actuating assembly 32 further comprises a positive electrode wire and a negative electrode wire (not shown in the figures). One end of the positive electrode wire is electrically connected to the positive electrode contact, and the other end is electrically connected to one of the elastic tabs 322. One end of the negative electrode wire is electrically connected to the negative electrode contact, and the other end is electrically connected to the other elastic tab 322. Through the above arrangement, the positive electrode wire is used to achieve electrical connection between one of the elastic tabs 322 and the positive electrode of the power supply, and the negative electrode wire is used to achieve electrical connection between the other elastic tab 322 and the negative electrode of the power supply. The positive electrode wire and the negative electrode wire enable the power supply to supply power to the coil 323, so that the coil 323 generates a magnetic field to drive the rotation of the mirror 20.

[0053] In some embodiments, the positive electrode wire is an external wire, such as a copper wire, an aluminum wire, etc., connected between one of the elastic tabs 322 and the positive electrode contact, and the negative electrode wire is an external wire, such as a copper wire, an aluminum wire, etc., connected between the other elastic tab 322 and the negative electrode contact. In other embodiments, the positive electrode wire and the negative electrode wire can also be conductive traces directly arranged on the surface of the flexible circuit board 321, such as copper foil traces or copper foil wires, and the actuating assembly 32 further comprises a first conductive wire and a second conductive wire (not shown in the figures). Both the first conductive wire and the second conductive wire are external wires, such as copper wires or aluminum wires. One end of the first conductive wire is electrically connected to one of the elastic tabs 322, and the other end is electrically connected to the positive electrode wire. One end of the second conductive wire is electrically connected to the other elastic tab 322, and the other end is electrically connected to the negative electrode wire.

[0054] Please refer to Figure 5 In some embodiments, the number of mirrors 20 is multiple, and the multiple mirrors 20 are arranged in the same horizontal plane along a specified direction X. The actuating mechanism 30 is arranged on each mirror 20, and is used to drive the rotation of a single mirror 20 to reflect the first time-sequential image light and the second time-sequential image light to the left eye and the right eye of the viewer, respectively. It should be noted that the above specified direction X is a horizontal direction and is perpendicular to the rotation axis O of a single mirror 20.

[0055] Through the above arrangement, the rotation axes O of the multiple mirrors 20 are all located in the same horizontal plane and are parallel to each other. Each mirror 20 can be driven by the actuating mechanism 30 connected thereto to rotate around the rotation axis O. When the first time-sequential image light or the second time-sequential image light emitted by the optical engine 10 is incident on the mirror 20 (which can be a single mirror 20 or multiple mirrors 20), the multiple mirrors 20 can be driven by the actuating mechanism 30 to rotate synchronously in the same direction by the same angle, so as to reflect the first time-sequential image light or the second time-sequential image light, thereby reflecting the first time-sequential image light to the left eye of the viewer or reflecting the second time-sequential image light to the right eye of the viewer, and further providing the user with a naked-eye 3D visual effect.

[0056] Compared with using a single mirror 20, the embodiment can reduce the space volume occupied by the rotation of the mirror 20 by using a plurality of mirrors 20 with relatively small volume to reflect the time-sequential image light, thereby facilitating further reduction of the overall volume of the naked-eye 3D projection device 100.

[0057] In some embodiments, the resolution of the light engine 10 is greater than the resolution of the mirror 20. By the above arrangement, the negative impact of the gap between two adjacent mirrors 20 on the projection quality can be minimized, thereby ensuring the imaging quality of the naked-eye 3D projection device 100.

[0058] In summary, the embodiment of the present application provides a naked-eye 3D projection device 100. The naked-eye 3D projection device 100 can reflect the first time-sequential image light and the second time-sequential image light emitted by the light engine 10 to the left eye and the right eye of the viewer, respectively, by driving the mirror 20 to rotate between the first position and the second position through the actuating structure 30 arranged on the mirror 20, thereby providing the viewer with the visual effect of viewing 3D images. The naked-eye 3D projection device 100 can reduce the number of light engines 10 arranged, thereby having the beneficial effects of simple structure, small volume, light weight, and low cost.

[0059] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0060] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some of the technical features. And these modifications or replacements do not drive the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A naked-eye 3D projection device for providing a viewer with a visual effect of watching a 3D image, the naked-eye 3D projection device comprising a light machine and a control unit; The light machine is used for emitting first time sequence image light and second time sequence image light according to the control instruction of the control unit, wherein the first time-sequential image light corresponds to the left eye of the viewer, and the second time-sequential image light corresponds to the right eye of the viewer, the viewer forms the visual effect of watching a 3D image through the first time-sequential image light and the second time-sequential image light entering the left eye and the right eye of the viewer; characterized in that the naked-eye 3D projection device further comprises an actuating mechanism and a mirror; the actuating mechanism is connected to the mirror, and the mirror is used to rotate under the driving of the actuating mechanism to reflect the first time-sequential image light and the second time-sequential image light to the left eye and the right eye of the viewer, respectively; the light machine and the actuating mechanism are electrically connected to the control unit; in the case that the light machine emits the first time-sequential image light, the actuating mechanism is used to drive the mirror to rotate to a first position under the control of the control unit to reflect the first time-sequential image light to the left eye of the viewer; in the case that the light machine emits the second time-sequential image light, the actuating mechanism is used to drive the mirror to rotate to a second position under the control of the control unit to reflect the second time-sequential image light to the right eye of the viewer.

2. The naked-eye 3D projection apparatus of claim 1, wherein, the actuating mechanism comprises a base, an actuating assembly and a magnet; the actuating assembly is arranged on the base and connected to the mirror, and the magnet is fixedly arranged on the base; the actuating assembly is used to generate a magnetic field after being energized to drive the mirror to rotate under the magnetic force in cooperation with the magnet.

3. The naked-eye 3D projection apparatus of claim 2, wherein, the base has a mounting plane, and the base has a receiving groove opened on the mounting plane; at least part of the structure of the actuating assembly is located in the receiving groove, and at least part of the structure of the actuating assembly is located outside the receiving groove and connected to the mirror to make the mirror suspended; the mirror is located outside the receiving groove and arranged opposite to the opening of the receiving groove; in the case that the mirror rotates, the receiving groove is used to accommodate the mirror.

4. The naked-eye 3D projection apparatus of claim 3, wherein, the mirror has opposite first and second sides, and a rotation axis of the mirror is located between the first and second sides; the magnet is provided with two magnets, and the two magnets are arranged opposite to the first and second sides, respectively; the actuating assembly comprises a flexible circuit board, a spring and a coil; the flexible circuit board is arranged on the base, and the flexible circuit board is provided with a positive contact and a negative contact; the spring is arranged on the base, the spring is provided with two springs, the two springs are electrically connected to the positive contact and the negative contact, respectively, and the two springs are connected to the mirror; the coil is connected between the two springs, and the coil and the two springs jointly support the mirror to make the mirror suspended; the coil is connected in series between the two springs, and the coil is located between the two magnets.

5. The naked-eye 3D projection apparatus of claim 4, wherein, The elastic sheet comprises a first mounting portion, a connecting portion and a second mounting portion; the first mounting portion is arranged on the mounting plane; the second mounting portion is connected to the mirror; the connecting portion is connected between the first mounting portion and the second mounting portion and extends along the rotation axis of the mirror.

6. The naked-eye 3D projection apparatus of claim 5, wherein, The actuating assembly further comprises a positioning bolt, which is arranged in the first mounting portion and is screwed into the base, and the positioning bolt presses the first mounting portion against the mounting plane.

7. The naked-eye 3D projection apparatus of claim 5, wherein, The coil is connected to the side of the second mounting portion away from the mirror, and the coil is connected to the second mounting portion of both elastic sheets.

8. The naked-eye 3D projection apparatus of claim 4, wherein, The actuating assembly further comprises a positive electrode lead and a negative electrode lead; one end of the positive electrode lead is electrically connected to the positive electrode contact, and the other end is electrically connected to one of the elastic sheets; one end of the negative electrode lead is electrically connected to the negative electrode contact, and the other end is electrically connected to the other elastic sheet.

9. The naked-eye 3D projection apparatus of claim 4, wherein, The base is provided with a receiving hole in communication with the receiving groove, the flexible circuit board is arranged in the receiving hole, and a part of the structure of the flexible circuit board is located in the receiving groove and the other part is located outside the receiving groove; the positive electrode contact and the negative electrode contact are located outside the receiving groove.

10. The naked-eye 3D projection apparatus according to any one of claims 1 to 9, wherein The number of mirrors is multiple, and multiple mirrors are arranged in the same horizontal plane along a specified direction; the actuating mechanism is arranged on each mirror, and the actuating mechanism is used to drive the rotation of a single mirror to reflect the first time sequence image light and the second time sequence image light to the left eye and the right eye of the viewer, respectively.

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