3D display device

Abstract

A 3D display device (100), comprising a carrier (101), wherein the carrier (101) is provided with a plurality of optical projection units (1). Each optical projection unit (1) has a plurality of independent projection surfaces (10). The projection surfaces (10) comprise a first projection surface (11) formed by a first direction and a second direction that are perpendicular to each other, a second projection surface (12) formed by the first direction and a third direction that are perpendicular to each other, and a third projection surface (13) formed by the second direction and the third direction that are perpendicular to each other. Projection directions provided by the projection surfaces (10) of a single optical projection unit (1) are unidirectional outward directions. The projection direction of the first projection surface (11) is a unidirectional outward first projection direction that passes through the first projection surface (11). The projection direction of the second projection surface (12) is a unidirectional outward second projection direction that passes through the second projection surface (12). The projection direction of the third projection surface (13) is a unidirectional outward third projection direction that passes through the third projection surface (13).

Description

3D display device TECHNICAL FIELD

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

[0002] Compared with 2D display, 3D display can make the picture stereoscopic and lifelike, the image is no longer limited to the plane of the screen, as if it can walk out of the screen, so that the audience have a sense of being there.

[0003] The basic principle of realizing 3D display is that the left and right eyes of the human eye receive different pictures respectively, and then the brain superimposes and regenerates the image information to form an image with front-back, up-down, left-right, and near-far stereoscopic direction effects, as known by those skilled in the art.

[0004] The way to realize 3D display can be glasses type and naked eye type. The glasses type 3D display mainly includes chromatic aberration type, polarization type and active shutter type, that is, the commonly used color separation method, light separation method and time division method. However, this method needs to use 3D glasses, and the use scene is greatly limited.

[0005] Naked eye 3D display is a technology that realizes stereoscopic visual effect without the help of polarized light glasses and other external tools. For example, in the prior art, there is a rotating display device for realizing naked eye 3D display, such as rotating LED display technology: this technology uses the principle of visual persistence to realize planar imaging through high-speed rotation of LED, but since the LED light bar is not completely airtight when rotating, the observer can still see the objects behind the light bar, so that the observer feels that the picture is floating in the air, realizing a 3D-like effect.

[0006] For example, specifically, it can be driven by the high-speed rotation of a DC motor, several LEDs are driven by a single-chip microcomputer chip to control the high-speed on-off of the LEDs at the nanosecond level, and various patterns can be formed in the air by using the visual persistence principle of the human eye. Inside it contains a rotating trigger for detecting and calculating the time required for one rotation. The outside contains a transparent protective cover made of plastic or glass to prevent the high-speed rotating LEDs inside from being damaged by contacting foreign objects. Inside it contains a wireless power supply system or a battery. The wireless power supply is used to power the rotating module. If a battery is used, the wireless power supply system can be omitted. Or a small mirror is driven by a DC motor, a small magnet is installed on the mirror, and a Hall sensor is installed on the top of the LED near the mirror. The LED and the Hall sensor do not rotate, and the mirror and the magnet are driven by the motor to rotate at high speed. The wireless power supply system and the wireless communication system can be omitted. The single-chip microcomputer controls the high-speed on-off of the laser LED, and the precision reaches the nanosecond level. The Hall sensor returns a signal to the single-chip microcomputer after detecting the magnet, and the time required for one rotation is calculated. The duration of a pixel is calculated by the resolution. Several LED laser tubes are directed to the mirror and then reflected. Through the different angles of reflection of the mirror, the data of a pixel is reflected to different positions.

[0007] However, for the current rotating naked-eye 3D display device using the visual persistence principle, the inventors found that the 3D display effect is relatively virtual and needs to be further improved. SUMMARY

[0008] The technical problem to be solved by the present application is to solve the problem of virtual display of the rotating naked-eye 3D display device using the visual persistence principle, and to achieve better 3D display effect.

[0009] According to a 3D display device according to the first aspect of the present application, the 3D display space includes a D space formed by a first direction, a second direction, and a third direction perpendicular to each other. The display device includes a carrier provided with a plurality of optical projection units. Each optical projection unit has a plurality of independent projection faces, including a first projection face formed by the first direction and the second direction, a second projection face formed by the first direction and the third direction, and a third projection face formed by the second direction and the third direction. The projection direction of a single optical projection unit is a single outward direction. The projection direction of the first projection face is a first projection direction passing through the first projection face. The projection direction of the second projection face is a second projection direction passing through the second projection face. The projection direction of the third projection face is a third projection direction passing through the third projection face. A driving part is connected to the plurality of optical projection units and can drive the plurality of optical projection units to move.

[0010] In the above provided scheme of the 3D display device, by limiting the projection direction of the projection surface to only one-way outward direction, i.e. in the D space where the first direction, the second direction and the third direction are perpendicular to each other, the projection direction of the projection surface is only one-way outward direction through the projection surface, on the basis of the rotating naked eye 3D display using the principle of visual persistence, the problem that the 3D display effect is relatively virtual due to the visual interference caused by the naked eyes of the observer receiving light rays in various directions because the projection direction of the projection surface is not limited in the prior art is avoided, and the 3D display effect similar to the 3D display effect of attaching a film to the outer surface of an object can be achieved, and the display effect is better than the display effect of the rotating LE3D display technology in the prior art.

[0011] In one or more embodiments of the 3D display device, the first projection surface of the optical projection unit includes a first projection surface front and a first projection surface back with projection directions being the front and back of the third direction respectively, the second projection surface includes a second projection surface front and a second projection surface back with projection directions being the front and back of the second direction respectively, and the third projection surface includes a third projection surface front and a third projection surface back with projection directions being the front and back of the first direction respectively.

[0012] In one or more embodiments of the 3D display device, the light source of the optical projection unit is located inside the containing space defined by the first projection surface, the second projection surface and the third projection surface, and the first projection surface, the second projection surface and the third projection surface correspond to the first light source, the second light source and the third light source respectively; and the first projection surface, the second projection surface and the third projection surface are respectively provided with a first light collecting element, a second light collecting element and a third light collecting element, and the corresponding light collecting directions are a first projection direction, a second projection direction and a third projection direction which are one-way outward directions.

[0013] In one or more embodiments of the 3D display device, the light source of the optical projection unit is located on the outer surface of the first projection surface, the second projection surface and the third projection surface, and a shielding member is arranged between adjacent projection surfaces to shield the light beams of adjacent projection surfaces, so that the projection direction provided by the projection surface is only one-way outward direction.

[0014] In one or more embodiments of the 3D display device, at least one of the first projection surface, the second projection surface and the third projection surface has a plurality of projection sub-surfaces, and a shielding member is arranged between adjacent projection sub-surfaces to make the projection direction provided by the projection surface only one-way outward direction.

[0015] In one or more embodiments of the 3D display device, the optical projection unit is a rotatable member, and the first projection surface, the second projection surface, and the third projection surface are rotatable members, and the first projection surface, the second projection surface, and the third projection surface are rotatable along an axis of the optical projection unit, such that the light source is switched between the inner surface and the outer surface of the projection surface by rotation.

[0016] In one or more embodiments of the 3D display device, the driving unit comprises a driving motor, and the driving motor is capable of driving the carrier to rotate around an axis.

[0017] In one or more embodiments of the 3D display device, the carrier comprises a first part, and the plurality of optical projection units are arranged on a surface of the first part, and the projection surface is provided by at least a part of the surface of the first part, and the first part is rotatable around an axis inside the first part, and / or the carrier comprises a second part, and the plurality of optical projection units are arranged on a surface of the second part, and the projection surface is provided by at least a part of the surface of the second part, and the second part is rotatable around an axis outside the second part.

[0018] In one or more embodiments of the 3D display device, the carrier is internally provided with a control circuit board, and the control circuit board is electrically connected with the plurality of optical projection units and the driving unit.

[0019] In one or more embodiments of the 3D display device, the light source of the optical projection unit comprises an LED lamp.

[0020] SUMMARY

[0021] In order to make the above objectives, features and advantages of the present application more apparent, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings, in which:

[0022] FIG. 1A and FIG. 1B are structural schematic diagrams of a prior art rotating naked-eye 3D display device using the principle of visual persistence;

[0023] FIG. 2A and FIG. 2B are structural schematic diagrams of a 3D display device according to an embodiment of the present application.

[0024] FIG. 3A and FIG. 3B are structural schematic diagrams of an optical projection unit of a 3D display device according to a first embodiment of the present application.

[0025] FIG. 4 is a structural schematic diagram of an optical projection unit of a 3D display device according to a second embodiment of the present application.

[0026] FIG. 5 is a structural schematic diagram of an optical projection unit of a 3D display device according to a third embodiment of the present application.

[0027] Fig. 6 is a schematic diagram of an optical projection unit structure of a 3D display device according to a fourth embodiment of the present application.

[0028] Reference signs: 100-3D display device 101-carrier 1011-first part 1012-second part 102-driving part 1-optical projection unit 10-projection surface 1001-projection sub-surface 1002, 103, 1031, 1032-axis 104-control circuit board 11-first projection surface 111-front surface of first projection surface 112-back surface of first projection surface 12-second projection surface 121-front surface of second projection surface 122-back surface of second projection surface 13-third projection surface 131-front surface of third projection surface 132-back surface of third projection surface 1301-third projection sub-surface 14-light source 141-first light source 142-second light source 143-third light source 15-accommodation space 161-first light collecting element 162-second light collecting element 163-third light collecting element 17-shielding member.

[0029] Preferred embodiments of the present application

[0030] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0031] As shown in the present application and claims, unless the context clearly indicates otherwise, the words "one", "an", "a", and / or "the" do not specifically refer to the singular, but also include the plural. Generally speaking, the terms "comprise" and "include" only indicate the inclusion of the steps and elements explicitly identified, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements.

[0032] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, vertical, horizontal", and "top, bottom" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and in the absence of contrary indications, these orientation words do not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component.

[0033] In addition, it should be noted that the use of the terms "first", "second" and the like, to describe various elements in the specification, is merely intended to distinguish one element from another, and the above terms have no special meaning unless otherwise stated. In addition, although the terms used in the present application are selected from commonly known terms, some terms mentioned in the specification of the present application can be selected by the applicant according to his or her judgment, and the detailed meaning thereof is described in the relevant part of the description. In addition, the present application is required to be understood not only by the actual terms used, but also by the meaning implied by each term.

[0034] As shown in FIG. 1A, in the prior art, there is a rotating LED display device 100a which utilizes the principle of visual persistence to realize planar imaging by high-speed rotation of LEDs. Since the LED light bar is not airtight when rotating, the observer can still see the object behind the light bar, making the observer feel that the picture is floating in the air, achieving a 3D-like effect. For example, as shown in FIG. 1A, the rotating LED display device 100a includes a plurality of LED lights 14a connected in a line, which form a 3D display image at a fixed point by rotation and control program, which can also be called a holographic fan. However, the inventors have found in practice that the rotating LED display device 100a shown in FIG. 1A has the problem of a relatively virtual 3D display effect.

[0035] The inventors have found through in-depth research that the reason for the relatively virtual 3D display effect is that the projection direction of the LED light 14a of the device shown in FIG. 1A is as shown in FIG. 1B. The projection direction of the LED light 14a is in any direction in space 360°, which will cause visual interference in the observer's naked eye receiving light in various directions, resulting in the problem of a relatively virtual 3D display effect.

[0036] Based on the above, the inventors have invented a new 3D display device which limits the projection direction of the projection surface to only a single outward direction, i.e. in a 3D space with a first direction, a second direction and a third direction perpendicular to each other, the projection direction of the projection surface is only a single outward direction through the projection surface. On the basis of the rotating naked-eye 3D display utilizing the principle of visual persistence, the problem of a relatively virtual 3D display effect caused by the observer's naked eye receiving light in various directions due to the lack of limitation on the projection direction of the projection surface in the prior art is avoided, and a 3D display effect similar to attaching a film to the outer surface of an object can be achieved, and the display effect is better than that of the prior art rotating LED display technology.

[0037] Referring to FIGS. 2A-5, in some embodiments, the 3D space in which the 3D display device 100 is located is a 3D space in which a first direction, a second direction, and a third direction are perpendicular to each other. In this document, the first direction, the second direction, and the third direction are perpendicular to each other, and are exemplified by the X direction, the Y direction, and the Z direction shown in the figures, but are not limited thereto.

[0038] The 3D display device 100 includes a carrier 101 provided with a plurality of optical projection units 1, and a driving portion 102 connected to the plurality of optical projection units 1 and capable of driving the plurality of optical projection units 1 to move.

[0039] The 3D display device refers to a rotating naked-eye 3D display device that utilizes the principle of visual persistence. The implementation principle can refer to the rotating LED display device described above. The related control principle can also refer to the control principle of the existing rotating LED display device, in which a single-chip microcomputer controls the high-speed on-off of LEDs at a nanosecond level. The display principle and control principle implemented by the present application can refer to the existing rotating LED display device. The present application does not involve the improvement of the control method, and therefore the related control method is not described again. In some embodiments, the carrier 101 can be provided with a control circuit board 103 electrically connected to the plurality of optical projection units 1 and the driving portion 102, so as to make the structure of the display device 100 compact. However, this is not limited thereto. For example, the carrier 101 itself can include a circuit board provided with a plurality of LED lamps corresponding to the plurality of optical projection units 1. The control circuit board 103 for controlling the plurality of LED lamps can be installed inside the carrier 101 or outside, such as integrated near the driving portion 102 as shown in FIG. 3B. In addition, it can be understood that the power supply of the 3D display device 100 can be a battery built-in the carrier 101 or an external power supply, which can be adjusted according to actual needs.

[0040] The specific structure of the carrier 101 can be a first part 1011 in a columnar shape as shown in FIG. 2A, the plurality of optical projection units 1 are arranged on the surface of the first part 1011, the projection surface 10 is provided by at least part of the surface of the first part 1011, and the first part 1011 rotates around the axis 103 located inside the first part 1011. The specific shape of the first part in a columnar shape can be a quadrangular prism such as a cube structure as shown in FIG. 2A, but is not limited thereto. It can also be a prism with more edges, or a cylindrical structure such as a circular cylinder, a truncated circular cylinder, etc., but is not limited thereto. It can also be other shapes such as a spherical shape, a pyramid, etc. The axis of rotation 103 is not limited to rotating around the axis 1031 located inside the axis 103, for example, the carrier 101 can also include a second part 1021, and the movement of the second part 1021 is rotating around the axis 1032 located outside the second part 1021, that is, the plurality of optical projection units 1 are arranged on the surface of the second part 1012, the projection surface 10 is provided by at least part of the surface of the second part 1012, and the second part 1012 rotates around the axis 1032 located outside the second part 1012. In addition, the carrier 101 can also be a hybrid structure including the first part 1011 and the second part 1021, and is not limited thereto. In actual 3D display devices, different display images can be adjusted.

[0041] The specific structure of the driving part 102 can include a driving motor, the driving part 102 is connected to the plurality of optical projection units 1, and the driving part 102 can be connected to the carrier 101. The optical projection units 1 are fixedly connected to the carrier 101, so that the driving part 102 indirectly connects the optical projection units 1. For example, the driving part 102 can drive the carrier 101 to rotate around the axis 103 to drive the plurality of optical projection units 1 fixed to the carrier 101 to move. The optical projection units 1 are fixedly connected to the carrier 101, and the driving motor is used as the driving part 102, which is easy to control, but is not limited thereto. It can be understood that the movement form of driving the plurality of optical projection units 1 to move is generally rotation, but the form of movement is not excluded.

[0042] Continuing to refer to the embodiments shown in FIGS. 2A-5, the carrier 101 is provided with a plurality of optical projection units 1. Each of the optical projection units 1 has a plurality of independent projection faces 10, including a first projection face 11 formed perpendicularly in a first direction and a second direction, a second projection face 12 formed perpendicularly in the first direction and a third direction, and a third projection face 13 formed perpendicularly in the second direction and the third direction; the projection direction of the projection faces 10 of a single optical projection unit 1 is unidirectional outward, the projection direction of the first projection face 11 is unidirectional outward first projection direction through the first projection face 11, the projection direction of the second projection face 12 is unidirectional outward second projection direction through the second projection face 12, and the projection direction of the third projection face 13 is unidirectional outward third projection direction through the third projection face 13. The direction through the first projection face, the second projection face, and the third projection face here refers to the light rays unidirectional outwardly exiting the first projection face, the second projection face, and the third projection face, and not inwardly exiting, i.e., the angle range is 180°, rather than the prior art without limitation on the exiting direction and can exit in an angle range of 360°. For example, one case is that the projection direction of the first projection face 11 is unidirectional outward third direction, the projection direction of the second projection face 12 is unidirectional outward second direction, and the projection direction of the third projection face 13 is unidirectional outward first direction. That is, most of the light beams emitted by the light source or even all of the light beams make the projection direction of the first projection face 11 unidirectional outward third direction, the projection direction of the second projection face 12 unidirectional outward second direction, and the projection direction of the third projection face 13 unidirectional outward first direction, but it does not exclude that part of the light beams exit obliquely, which is not limited in this regard.

[0043] Referring to FIG. 3A, in some embodiments, the first projection face 11 of the optical projection unit 1 includes a first projection face front 111 and a first projection face back 112 with projection directions of the front and back sides, respectively, of the third direction; the second projection face 12 includes a second projection face front 121 and a second projection face back 122 with projection directions of the front and back sides, respectively, of the second direction; and the third projection face 13 includes a third projection face front 131 and a third projection face back 132 with projection directions of the front and back sides, respectively, of the first direction. For example, as shown in FIG. 3A, the projection direction of the third projection face 13 of the optical projection unit 1 is the first direction, i.e., for the left third projection face shown in the figure, the projection direction is toward the left observer, i.e., the right observer cannot receive the projected light rays of the left third projection face, and for the right third projection face, the projection direction is toward the right observer, at which time the left observer cannot receive the projected light rays of the right third projection face. Similarly, this is true for the upper side and the lower side corresponding to the first projection face 11, and the front side and the back side corresponding to the second projection face 12, which will not be described in detail one by one here.

[0044] In addition, the light source 14 of the optical projection unit 1 generally comprises an LED lamp, which is easy to control and has low energy consumption, but other forms of light-emitting light sources are not excluded.

[0045] The meaning of "projection direction" here is the direction of the light emitted by the light source of the optical projection unit 1, and "projection" is the emission of light so that the corresponding pixel point of the optical projection unit 1 is projected to the human eye. The one-way outward here is worth projecting towards the outside of the optical projection unit 1, not the inside of the projection unit.

[0046] The projection direction provided by the projection surface 10 of the single optical projection unit 1 is a one-way outward direction, and the projection direction is only a one-way direction through the projection surface, avoiding the structure of the prior art which does not limit the projection direction of the projection surface 360° light projection, resulting in the problem that the observer's naked eye receives light in all directions, causing visual interference and making the 3D display effect more virtual. The corresponding light source position can be as shown in FIG. 3B, the light source 14 of the optical projection unit 1 is located inside the containing space 15 defined by the first projection surface 11, the second projection surface 12, and the third projection surface 13, and the first projection surface 11, the second projection surface 12, and the third projection surface 13 correspond to the first light source 141, the second light source 142, and the third light source 143, respectively; and the first projection surface 11, the second projection surface 12, and the third projection surface 13 are respectively provided with the first light collecting element 161, the second light collecting element 162, and the third light collecting element 163, and the corresponding light collecting directions are the first projection direction, the second projection direction, and the third projection direction, which are respectively one-way outward, for example, they can be respectively the third direction, the second direction, and the first direction. The specific structure of the light collecting element can adopt the convex lens, optical pattern and other optical components commonly used in the art, which will not be described here. It can be understood that, in order to clearly show the internal structure, the single optical projection unit 1 shown in FIG. 3B omits the first projection surface 11 located at the upper part.

[0047] As shown in FIG. 4, in some embodiments, the position of the light source 14 can also be that the light source 14 of the optical projection unit 1 is located on the outer surface of the first projection surface 11, the second projection surface 12, and the third projection surface 13, and the blocking piece 17 is arranged between the adjacent projection surfaces 10 to block the light beams of the adjacent projection surfaces 10, so that the projection direction provided by the projection surface 10 is only a one-way outward direction. It can be understood that the specific optical form of the blocking piece 17 can be a light-absorbing piece or a collimator, and the collimation direction is the projection direction of the projection surface, as long as it blocks the light beams of the adjacent projection surfaces 10 to avoid mutual influence.

[0048] As shown in FIG. 5, in some embodiments, the structure of the projection surface can also be provided with a plurality of projection facets, at least one of the first projection surface 11, the second projection surface 12, and the third projection surface 13 is provided with a plurality of projection facets 1001, and a shielding member 17 is arranged between adjacent projection facets 1001, so that the projection direction provided by the projection surface 10 is only a single outward direction. For example, as shown in FIG. 5, for the third projection surface 13, there are two third projection facets 1301, and the structure of the optical projection unit 1 is a hexagonal prism, rather than a quadrangular prism as shown in FIGS. 3 and 4. It can be understood that the number of projection facets can be adjusted according to actual requirements, and is not limited to the number shown in the figures.

[0049] As shown in FIG. 6, in the above-described embodiments, the connection between the optical projection unit 1 and the driving part 102 can also be that the driving part 102 is directly connected to a plurality of optical projection units 1, and the driving part 102 can drive the plurality of optical projection units 1 to move. For example, the plurality of optical projection units 1 are still fixed to the carrier 101, but the optical projection unit 1 is a rotatable member on the carrier 101, and the first projection surface 11, the second projection surface 12, and the third projection surface 13 are rotatable members, and the first projection surface 11, the second projection surface 12, and the third projection surface 13 can rotate along the axis 1002 of the optical projection unit 1 itself, so that the projection surface 10 can switch the position of the light source 14 between the inner surface and the outer surface of the projection surface 10 by rotating. At this time, the structure of the driving part 102 can be that each optical projection unit 1 is provided with a corresponding driving motor. It can be understood that since the volume of the optical projection unit 1 is generally small, the volume of the corresponding driving motor is also small, such as a micro motor commonly used in small electronic products, and the like, which are not limited in this regard. Such a movement structure has more precise control, but the structure is relatively more complex.

[0050] In summary, the 3D display device of the present application has the following advantages, including but not limited to: by limiting the projection direction of the projection surface to only a single outward direction, i.e., in a 3D space in which the first direction, the second direction, and the third direction are perpendicular to each other, the projection direction of the projection surface is only a single outward direction through the projection surface, and on the basis of the rotating naked-eye 3D display using the visual persistence principle, the problem that the 3D display effect is relatively virtual due to visual interference caused by the naked eye of the observer receiving light rays in various directions is avoided, and a 3D display effect similar to that of an object with a film attached to the outer surface can be achieved, and the display effect is better than that of the rotating LED display technology of the prior art.

[0051] Although the present application has been described with reference to the current embodiments, persons having ordinary skill in the art will recognize that changes can be made in form and detail without departing from the spirit and the scope of the application. Therefore, the described embodiments are to be considered in all respects as illustrative and not restrictive, and all changes coming within the meaning and equivalency range of the appended claims are intended to be embraced therein.

Claims

1. A 3D display device (100), characterized in that The space of the 3D display comprises a 3D space formed by a first direction, a second direction and a third direction perpendicular to each other, and the 3D display device (100) comprises: a carrier (101) provided with a plurality of optical projection units (1); wherein, each optical projection unit (1) has a plurality of independent projection faces (10), which comprise a first projection face (11) formed by a first direction and a second direction perpendicular to each other, a second projection face (12) formed by a first direction and a third direction perpendicular to each other, and a third projection face (13) formed by a second direction and a third direction perpendicular to each other; the projection direction provided by the projection face (10) of a single optical projection unit (1) is a unidirectional outward direction, the projection direction of the first projection face (11) is a unidirectional outward first projection direction through the first projection face, the projection direction of the second projection face (12) is a unidirectional outward second projection direction through the second projection face, and the projection direction of the third projection face (13) is a unidirectional outward third projection direction through the third projection face; a driving part (102) connected to the plurality of optical projection units (1) and capable of driving the plurality of optical projection units (1) to move.

2. The 3D display device (100) of claim 1, characterized by The first projection face (11) of the optical projection unit (1) comprises a first projection face front face (111) and a first projection face back face (112) with projection directions being a third direction front face and a third direction back face, respectively, the second projection face (12) comprises a second projection face front face (121) and a second projection face back face (122) with projection directions being a second direction front face and a second direction back face, respectively, and the third projection face (13) comprises a third projection face front face (131) and a third projection face back face (132) with projection directions being a first direction front face and a first direction back face, respectively.

3. The 3D display device (100) of claim 1, characterized by The light source (14) of the optical projection unit (1) is located inside an accommodation space (15) defined by the first projection face (11), the second projection face (12) and the third projection face (13), the first projection face (11), the second projection face (12) and the third projection face (13) correspond to a first light source (141), a second light source (142) and a third light source (143) respectively, and the first projection face (11), the second projection face (12) and the third projection face (13) are respectively provided with a first light collecting element (161), a second light collecting element (162) and a third light collecting element (163) with corresponding light collecting directions being a unidirectional outward first projection direction, a unidirectional outward second projection direction and a unidirectional outward third projection direction.

4. The 3D display device (100) of claim 1, characterized by The light source (14) of the optical projection unit (1) is located on the outer surface of the first projection face (11), the second projection face (12) and the third projection face (13), and a shielding piece (17) is arranged between adjacent projection faces (10) to shield the light beams of adjacent projection faces (10), so that the projection direction provided by the projection face (10) is only a unidirectional outward direction.

5. The 3D display device (100) according to claim 3 or 4, characterized in that At least one of the first projection surface (11), the second projection surface (12) and the third projection surface (13) has a plurality of projection sub-surfaces (1001), and a shielding member (17) is arranged between adjacent ones of the plurality of projection sub-surfaces (1001), so that the projection surface (10) provides a projection direction that is only a single outward direction.

6. The 3D display device (100) of claim 1, characterized by The optical projection unit (1) is a rotatable member, and the first projection surface (11), the second projection surface (12) and the third projection surface (13) are rotatable members that can rotate along an axis (1002) of the optical projection unit (1) itself, so that the projection surface (10) can switch the position of the light source (14) between the inner surface and the outer surface of the projection surface (10) by rotation.

7. The 3D display device (100) according to claim 1, characterized in that The driving part (102) comprises a driving motor that can drive the carrier (101) to rotate around the axis (103).

8. The 3D display device (100) according to claim 1, characterized in that The carrier (101) comprises a first part (1011), and the plurality of optical projection units (1) are arranged on the surface of the first part (1011), and the projection surface (10) provides at least part of the surface of the first part (1011), and the first part (1011) rotates around an axis (1031) located inside the first part (1011), and / or the carrier (101) comprises a second part (1012), and the plurality of optical projection units (1) are arranged on the surface of the second part (1012), and the projection surface (10) provides at least part of the surface of the second part (1012), and the second part (1012) rotates around an axis (1032) located outside the second part (1012).

9. The 3D display device (100) according to claim 1, characterized in that The carrier (101) is internally provided with a control circuit board (104) that is electrically connected to the plurality of optical projection units (1) and the driving part (102).

10. The 3D display apparatus (100) of claim 1, characterized by The light source (14) of the optical projection unit (1) comprises an LED lamp.

Images