3D display device

Abstract

The utility model relates to a 3D display device. The 3D display device comprises a carrier, which is provided with a plurality of optical projection units; wherein each optical projection unit is provided with a plurality of independent projection surfaces, and the projection surfaces comprise a first projection surface which is vertically formed in a first direction and a second direction, a second projection surface which is vertically formed in the first direction and a third direction, and a third projection surface which is vertically formed in the second direction and the third direction; the projection direction provided by the projection surface of the single optical projection unit is a unidirectional outward direction, the projection direction of the first projection surface is a unidirectional outward first projection direction penetrating through the first projection surface, and the projection direction of the second projection surface is a unidirectional outward second projection direction penetrating through the second projection surface. The projection direction of the third projection surface is a third projection direction which passes through the third projection surface in a unidirectional outward manner.

Description

Technical Field

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

[0002] Compared with 2D display, 3D display can make the picture three-dimensional and realistic. The image is no longer limited to the plane of the screen, but seems to be able to walk out of the screen, giving the audience an immersive feeling.

[0003] The basic principle of realizing 3D display, as known to those skilled in the art, is to use the left and right eyes of the human body to receive different images respectively, and then the brain superimposes and regenerates the image information to form an image with three-dimensional directional effects such as front-back, up-down, left-right, far-near, etc.

[0004] There are generally two ways to achieve 3D display: glasses type and naked eye type. Glasses type 3D display methods mainly include chromatic aberration type, polarization type and active shutter type, which are commonly known as color division, light division and time division. However, this method requires the use of 3D glasses and its usage scenarios are greatly limited.

[0005] Naked-eye 3D display is a technology that achieves stereoscopic visual effects without the help of external tools such as polarized glasses. For example, in the prior art, there is a device that achieves naked-eye 3D display by rotating display, such as rotating LED display technology: this technology uses the principle of visual persistence to achieve planar imaging through high-speed rotation of LEDs, but because the LED light bar is not airtight when rotating, the observer can still see the object behind the light bar, so that the observer feels that the picture is suspended in the air, achieving a 3D-like effect.

[0006] For example, specifically, it can be that the high-speed rotation of a DC motor drives several LEDs, and the single-chip microcomputer chip controls the high-speed lighting and extinguishing of the LEDs at the nanosecond level. Utilizing the principle of persistence of vision of the human eye, various patterns can thus be formed in the air. It is internally equipped with a rotary trigger for detecting and calculating the time required for one rotation. The exterior includes a transparent protective cover made of plastic or glass to prevent the high-speed rotating LEDs inside from contacting foreign objects and causing harm. It internally includes a wireless power supply system or a battery. The wireless power supply is used to supply power to the modules in the rotating part. If a battery is used, the wireless power supply system can be omitted. Or it can be that a DC motor drives a small mirror, and a small magnet is installed on the mirror. A Hall sensor is installed near the mirror at the top of the LED. The LED and the Hall sensor do not rotate, while the mirror and the magnet are driven by the motor to rotate at high speed, thus eliminating the wireless power supply system and the wireless communication system. The single-chip microcomputer controls the high-speed lighting and extinguishing of the laser LED with an accuracy reaching the nanosecond level. After the Hall sensor detects the magnet, it returns a signal to the single-chip microcomputer, and then the time required for one rotation can be calculated. Then, the duration of retaining one pixel can be calculated through the resolution. Several LED laser tubes shoot towards the mirror and then are reflected. The data of one pixel is reflected to different positions through the different angles of reflection of the mirror.

[0007] However, for the current rotating naked-eye 3D display device that utilizes the principle of persistence of vision, the inventor has found that the 3D display effect gives a rather floating visual impression, and its 3D display effect needs to be further improved. Utility Model Content

[0008] The technical problem to be solved by this application is to achieve a better 3D display effect for the problem of the floating visual impression of the rotating naked-eye 3D display device that utilizes the principle of persistence of vision.

[0009] A 3D display device according to the first aspect of this application. The 3D display space includes a D space formed by the mutual perpendicularity of a first direction, a second direction, and a third direction. The display device includes: a carrier, and multiple optical projection units are provided on the carrier; wherein, each optical projection unit has multiple independent projection surfaces. The projection surfaces include a first projection surface formed by the perpendicularity of the first direction and the second direction, a second projection surface formed by the perpendicularity of the first direction and the third direction, and a third projection surface formed by the perpendicularity of the second direction and the third direction; the projection direction provided by the projection surface of a single optical projection unit is a unidirectional outward direction. The projection direction of the first projection surface is a first projection direction that unidirectionally passes through the first projection surface and outward, the projection direction of the second projection surface is a second projection direction that unidirectionally passes through the second projection surface and outward, and the projection direction of the third projection surface is a third projection direction that unidirectionally passes through the third projection surface and outward; a driving part, the driving part is connected to the multiple optical projection units and can drive the multiple optical projection units to move.

[0010] In the solution of the 3D display device provided above, by restricting the projection direction of the projection plane to only an unidirectional outward direction, that is, 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 plane is only the unidirectional outward direction passing through the projection plane. Based on the rotational autostereoscopic 3D display using the principle of persistence of vision, it avoids the problem in the prior art that without restricting the projection direction of the projection plane, the observer's naked eyes receive light from all directions, resulting in visual interference and making the 3D display effect relatively blurry. Instead, it can achieve a 3D display effect similar to attaching a film to the outer surface of an object, and the display effect is better than that of the rotational LE3D display technology in the prior art.

[0011] In one or more embodiments of the 3D display device, the first projection plane of the optical projection unit includes a first front projection plane and a first back projection plane with projection directions being the front side and the back side in the third direction respectively, the second projection plane includes a second front projection plane and a second back projection plane with projection directions being the front side and the back side in the second direction respectively, and the third projection plane includes a third front projection plane and a third back projection plane with projection directions being the front side and the back side in 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 accommodation space defined by the first projection plane, the second projection plane, and the third projection plane. The first projection plane, the second projection plane, and the third projection plane respectively correspond to a first light source, a second light source, and a third light source; and the first projection plane, the second projection plane, and the third projection plane are respectively provided with a first condenser, a second condenser, and a third condenser, and the corresponding condensing directions are the unidirectional outward first projection direction, the unidirectional outward second projection direction, and the unidirectional outward third projection direction respectively.

[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 plane, the second projection plane, and the third projection plane. A shielding member is provided between adjacent projection planes to shield the light beams of adjacent projection planes, so that the projection direction provided by the projection plane is only the unidirectional outward direction.

[0014] In one or more embodiments of the 3D display device, at least one of the first projection plane, the second projection plane, and the third projection plane has a plurality of projection sub - planes, and a shielding member is provided between adjacent projection sub - planes, so that the projection direction provided by the projection plane is only the unidirectional outward direction.

[0015] In one or more embodiments of the 3D display device, the optical projection unit has a rotatable carrier, and the first projection surface, the second projection surface, and the third projection surface are rotatable members. The first projection surface, the second projection surface, and the third projection surface can rotate along the axis of the optical projection unit itself, so that the projection surface can rotate to switch the position of the light source between the inner surface and the outer surface of the projection surface.

[0016] In one or more embodiments of the 3D display device, the driving part includes a driving motor that can drive the carrier to rotate around the axis.

[0017] In one or more embodiments of the 3D display device, the carrier includes a first part, and the plurality of optical projection units are arranged on the surface of the first part. The projection surface provides at least part of the surface of the first part, and the first part rotates around the axis located inside itself, and / or the carrier includes a second part, and the plurality of optical projection units are arranged on the surface of the second part. The projection surface provides at least part of the surface of the second part, and the second part rotates around the axis located outside itself.

[0018] In one or more embodiments of the 3D display device, a control circuit board is arranged inside the carrier and is electrically connected to the plurality of optical projection units and the driving part.

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

[0020] To make the above objects, features, and advantages of the present application more obvious and understandable, the following describes the specific embodiments of the present application in detail with reference to the drawings, where:

[0021] Figure 1A 、 Figure 1B is a structural schematic diagram of a rotary naked-eye 3D display device using the principle of persistence of vision in the prior art;

[0022] Figure 2A 、 Figure 2B is a structural schematic diagram of a 3D display device according to an embodiment of the present application.

[0023] Figure 3A 、 Figure 3B is a structural schematic diagram of an optical projection unit of a 3D display device according to the first embodiment of the present application.

[0024] Figure 4 is a structural schematic diagram of an optical projection unit of a 3D display device according to the second embodiment of the present application.

[0025] Figure 5Schematic structural diagram of the optical projection unit of the 3D display device according to the third embodiment of the present application.

[0026] Figure 6 Schematic structural diagram of the optical projection unit of the 3D display device according to the fourth embodiment of the present application.

[0027] Reference numerals:

[0028] 100 - 3D display device

[0029] 101 - carrier

[0030] 1011 - first part

[0031] 1012 - second part

[0032] 102 - driving part

[0033] 1 - optical projection unit

[0034] 10 - projection surface

[0035] 1001 - projection sub - surface

[0036] 1002, 103, 1031, 1032 - axes

[0037] 104 - control circuit board

[0038] 11 - first projection surface

[0039] 111 - front of the first projection surface

[0040] 112 - back of the first projection surface

[0041] 12 - second projection surface

[0042] 121 - front of the second projection surface

[0043] 122 - back of the second projection surface

[0044] 13 - third projection surface

[0045] 131 - front of the third projection surface

[0046] 132 - back of the third projection surface

[0047] 1301 - third projection sub - surface

[0048] 14 - light source

[0049] 141 - first light source

[0050] 142 - second light source

[0051] 143 - third light source

[0052] 15 - Accommodating Space

[0053] 161 - First Condensing Element

[0054] 162 - Second Condensing Element

[0055] 163 - Third Condensing Element

[0056] 17 - Shielding Member. Detailed Embodiments

[0057] To make the above - mentioned objects, features, and advantages of the present application more obvious and understandable, the following provides a detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings.

[0058] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0059] As shown in the present application and the claims, unless the context clearly indicates an exception, words such as "a", "an", "one", and / or "the" are not specifically singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0060] In the description of the present application, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, back, up, down, left, right", "lateral, vertical, upright, horizontal" and "top, bottom" are usually based on the orientation or positional relationships shown in the drawings. This is only for the convenience of describing the present application and simplifying the description. Without contrary explanations, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as limiting the protection scope of the present application; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0061] In addition, it should be noted that the use of words such as "first", "second" to limit components is only for the convenience of distinguishing the corresponding components. Without additional statements, the above words have no special meanings. Therefore, it should not be construed as limiting the protection scope of the present application. In addition, although the terms used in the present application are selected from well - known and commonly used terms, some of the terms mentioned in the specification of the present application may be selected by the applicant according to his or her judgment. Their detailed meanings are described in the relevant parts of the description herein. In addition, it is required to understand the present application not only through the actual terms used, but also through the meaning implied by each term.

[0062] AsFigure 1A As shown, in the prior art, there is a rotating LED display device 100a that utilizes the principle of persistence of vision to achieve planar imaging through the high-speed rotation of LEDs. Since the LED light strips are not airtight when rotating, observers can still see the objects behind the light strips, making the observers feel that the image is suspended in the air and achieving a 3D-like effect. For example Figure 1A As shown, the rotating LED display device 100a includes a plurality of LED lights 14a connected in a line. Through rotation and a control program, it forms a 3D display image when lit fixedly, and can also be called a holographic fan. However, the inventor found in practice that Figure 1A the rotating LED display device 100a shown has the problem that the 3D display effect is relatively floating.

[0063] The inventor found through in-depth research that the reason for the problem of the relatively floating 3D display effect is that Figure 1A in the device shown, the projection direction of the LED light 14a is as Figure 1B shown. The projection direction of the LED light 14a is in any direction of 360° in space. This will cause the observer's naked eyes to receive light from all directions, resulting in visual interference and making the 3D display effect relatively floating.

[0064] Based on the above, the inventor invented a new 3D display device. By restricting the projection direction of the projection plane to only a unidirectional outward direction, that is, in a 3D space where the first direction, the second direction, and the third direction are perpendicular to each other, the projection direction of the projection plane is only a unidirectional outward direction passing through the projection plane. On the basis of the rotating naked-eye 3D display using the principle of persistence of vision, it avoids the problem in the prior art that without restricting the projection direction of the projection plane, the observer's naked eyes receive light from all directions, resulting in visual interference and making the 3D display effect relatively floating, and can achieve a 3D display effect similar to attaching a film to the outer surface of an object. The display effect is better than that of the rotating LED display technology in the prior art.

[0065] Refer to Figures 2A to 5 As shown, in some embodiments, the 3D space where the 3D display device 100 is located is the 3D space formed by the first direction, the second direction, and the third direction being perpendicular to each other. In this article, the first direction, the second direction, and the third direction are perpendicular to each other. Taking the X direction, Y direction, and Z direction shown in the figure as an example, but not limited thereto.

[0066] The 3D display device 100 includes a carrier 101. The carrier 101 is provided with a plurality of optical projection units 1, and further includes a driving part 102. The driving part 102 is connected to the plurality of optical projection units 1 and can drive the plurality of optical projection units 1 to move.

[0067] The "3D display device" here refers to a rotating naked-eye 3D display that utilizes the principle of persistence of vision. The implementation principle can refer to the rotating LED display device introduced above. The relevant control principle can also be similar to that of the existing rotating LED display device introduced above, which is the control principle of the microcontroller chip controlling the high-speed on and off of the LED at the nanosecond level. The display principle and control principle implemented in this application can both refer to the existing rotating LED display device. This application does not involve the improvement of the control method, so the relevant control methods will not be elaborated here. In some embodiments, a control circuit board 103 can be disposed inside the carrier 101 and electrically connected to the plurality of optical projection units 1 and the driving unit 102, thus making the structure of the display device 100 compact. However, this is not a limitation. For example, the carrier 101 itself can include a circuit board with a plurality of LED lights provided with corresponding optical projection units 1, and the control circuit board 103 for controlling the plurality of LED lights can be installed inside the carrier 101 or outside, such as Figure 3B as shown, integrally installed near the driving unit 102. Additionally, it can be understood that the power supply of the 3D display device 100 can be a battery built into the carrier 101 or an external power supply, which can be adjusted according to actual needs.

[0068] The specific structure of the carrier 101 can be Figure 2A as shown, including a columnar first part 1011, and a plurality of optical projection units 1 are disposed on the surface of the first part 1011. The projection surface 10 provides at least a part of the surface of the first part 1011, and the first part 1011 rotates around an axis 103 located inside itself. The specific shape of the columnar first part can be Figure 2A as shown, a quadrangular prism such as a cube structure, but this is not a limitation. It can also be a prism with more sides, or a cylindrical, toroidal cylindrical and other columnar structures, but this is not a limitation. It can also be other shapes, such as spherical, pyramidal and other shapes. The axis of rotation 103 is not limited to rotating around the axis 1031 located inside itself. For example, the carrier 101 can further include a second part 1021, and the movement of the second part 1021 is to rotate around an axis 1032 outside itself, that is, a plurality of optical projection units 1 are disposed on the surface of the second part 1012, and the projection surface 10 provides at least a part of the surface of the second part 1012, and the second part 1012 rotates around an axis 1032 located outside itself. Additionally, the carrier 101 can also be a hybrid structure including the first part 1011 and the second part 1021 at the same time, and none of them are limitations; in an actual 3D display device, it can be adjusted according to different display images.

[0069] The specific structure of the driving unit 102 may include a driving motor. The driving unit 102 is connected to a plurality of optical projection units 1. It may be that the driving unit 102 is connected to the carrier 101, and the optical projection unit 1 is fixedly connected to the carrier 101, so that the driving unit 102 is indirectly connected to the optical projection unit 1. For example, the driving unit 102 can drive the carrier 101 to rotate around the axis 103 to drive a plurality of optical projection units 1 fixed to the carrier 101. The optical projection unit 1 is fixedly connected to the carrier 101 and uses a driving motor as the driving unit 102, which is easy to control, but this is not a limitation. It can be understood that the form of movement for driving a plurality of optical projection units 1 here is generally rotation, but the form of movement of translation is not excluded.

[0070] Continue to refer to Figures 2A to 5 As shown, the carrier 101 is provided with a plurality of optical projection units 1. Among them, each optical projection unit 1 has a plurality of independent projection surfaces 10. The projection surface includes a first projection surface 11 formed by the perpendicularity of the first direction and the second direction, a second projection surface 12 formed by the perpendicularity of the first direction and the third direction, and a third projection surface 13 formed by the perpendicularity of the second direction and the third direction; the projection direction provided by the projection surface 10 of a single optical projection unit 1 is a unidirectional outward direction. The projection direction of the first projection surface 11 is a first projection direction that is unidirectionally outward and passes through the first projection surface 11. The projection direction of the second projection surface 12 is a second projection direction that is unidirectionally outward and passes through the second projection surface 12. The projection direction of the third projection surface 13 is a third projection direction that is unidirectionally outward and passes through the third projection surface 13. The direction passing through the first projection surface, the second projection surface, and the third projection surface here refers to the light beam exiting unidirectionally outward from the first projection surface, the second projection surface, and the third projection surface, and will not exit inward, that is, the angular range is 180°, rather than the prior art where the exit direction is not limited and can exit within an angular range of 360°. For example, in one case, the projection direction of the first projection surface 11 is the third direction that is unidirectionally outward, the projection direction of the second projection surface 12 is the second direction that is unidirectionally outward, and the projection direction of the third projection surface 13 is the first direction that is unidirectionally outward. That is, most or even all of the light beams emitted by the light source make the projection direction of the first projection surface 11 the third direction that is unidirectionally outward, the projection direction of the second projection surface 12 the second direction that is unidirectionally outward, and the projection direction of the third projection surface 13 the first direction that is unidirectionally outward. However, it is not excluded that some light beams are emitted obliquely, and none of these are limitations.

[0071] Refer to Figure 3AAs shown, in some embodiments, the first projection surface 11 of the optical projection unit 1 includes a first projection surface front 111 and a first projection surface back 112 with projection directions being the front side and the back side in the third direction respectively. The second projection surface 12 includes a second projection surface front 121 and a second projection surface back 122 with projection directions being the front side and the back side in the second direction respectively. The third projection surface 13 includes a third projection surface front 131 and a third projection surface back 132 with projection directions being the front side and the back side in the first direction respectively. For example Figure 3A As shown, the projection direction of the third projection surface 13 of the optical projection unit 1 is the first direction, that is, for the third projection surface on the left side shown in the figure, the projection direction is towards the observer on the left side, that is, the observer on the right side cannot receive the projection light of the third projection surface on the left side. For the third projection surface on the right side, the projection direction is towards the observer on the right side. At this time, the observer on the left side cannot receive the projection light of the third projection surface on the right side. Similarly, the same is true for the upper side and the lower side corresponding to the first projection surface 11, and the front side and the back side corresponding to the second projection surface 12. Details are not described one by one here.

[0072] In addition, the light source 14 of the optical projection unit 1 generally includes an LED lamp. Using an LED lamp is easy to control and has low energy consumption, but other forms of light-emitting light sources are not excluded.

[0073] The meaning of the "projection direction" here is the emission direction of the light emitted by the light source of the optical projection unit 1. "Projection" means the emission of light, so that the pixel points corresponding to the optical projection unit 1 are projected onto the human eye. The one-way outward here means projecting towards the outside of the optical projection unit 1, rather than the inside of the projection unit.

[0074] The structure that enables the projection surface 10 of a single optical projection unit 1 to provide a one-way outward projection direction, and the projection direction is only one-way through the projection surface, avoiding the problem in the prior art that the projection direction of the projection surface is not restricted and 360° light is projected, resulting in visual interference caused by the observer's naked eyes receiving light from all directions and making the 3D display effect relatively floating. The specific position of the corresponding light source can be, for example Figure 3BAs shown, the light source 14 of the optical projection unit 1 is located inside the accommodation space 15 defined by the first projection surface 11, the second projection surface 12, and the third projection surface 13. The first projection surface 11, the second projection surface 12, and the third projection surface 13 respectively correspond to the first light source 141, the second light source 142, and the third light source 143. And the first projection surface 11, the second projection surface 12, and the third projection surface 13 are respectively provided with a first condenser 161, a second condenser 162, and a third condenser 163, and the corresponding condensing directions are the first projection direction that is unidirectionally outward, the second projection direction that is unidirectionally outward, and the third projection direction that is unidirectionally outward. For example, they can be the third direction that is unidirectionally outward, the second direction that is unidirectionally outward, and the first direction that is unidirectionally outward respectively. For the specific structure of the condenser, optical components such as convex lenses and optical patterns commonly used in the art can be adopted, which will not be elaborated here. It can be understood that, in order to clearly show the internal structure, Figure 3B For the single optical projection unit 1 shown, the first projection surface 11 located at the upper part is omitted.

[0075] As Figure 4 shown, 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. A shielding member 17 is provided between adjacent projection surfaces 10 to shield the light beams of adjacent projection surfaces 10, so that the projection direction provided by the projection surface 10 is only the unidirectional outward direction. It can be understood that the specific optical form of the shielding member 17 can be an absorbing member or a collimator, and the collimation direction is the projection direction of the projection surface, as long as the light beams of adjacent projection surfaces 10 are blocked to avoid mutual influence.

[0076] As Figure 5 shown, in some embodiments, the structure of the projection surface can also be that it has multiple projection sub - surfaces. At least one of the first projection surface 11, the second projection surface 12, and the third projection surface 13 has multiple projection sub - surfaces 1001. A shielding member 17 is provided between adjacent multiple projection sub - surfaces 1001, so that the projection direction provided by the projection surface 10 is only the unidirectional outward direction. For example, Figure 5 shown, for the third projection surface 13, it has two third projection sub - surfaces 1301. At this time, the structure of the optical projection unit 1 is different from that of the quadrangular prism shown in FIG. 3, Figure 4 shown, and the structure shown is a hexagonal prism. It can be understood that the number of projection sub - surfaces can be adjusted according to actual requirements and is not limited to the number shown in the figure. Figure 5 shown, the structure shown is a hexagonal prism. It can be understood that the number of projection sub - surfaces can be adjusted according to actual requirements and is not limited to the number shown in the figure.

[0077] As Figure 6As shown, in the embodiments described above, the connection between the optical projection unit 1 and the driving unit 102 can also be that the driving unit 102 is directly connected to multiple optical projection units 1, capable of driving the multiple optical projection units 1 to move. For example, the multiple optical projection units 1 are still fixed to the carrier 101, but the optical projection unit 1 is a rotatable part on the carrier 101, and the first projection surface 11, the second projection surface 12, and the third projection surface 13 are rotatable parts. 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 rotate to switch the position of the light source 14 between the inner surface and the outer surface of the projection surface 10. At this time, the structure of the driving unit 102 can be that a corresponding driving motor is provided for each optical projection unit 1. 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 a small-sized micro motor at this time, such as the common micro motors used in small electronic products, etc., and all are not limited thereto. Such a motion structure has more precise control, but relatively speaking, the structure is also more complex.

[0078] In summary, the beneficial effects of the 3D display device of the present application include but are not limited to that by restricting the projection direction of the projection surface to only the unidirectional outward direction, that is, in a 3D 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 the unidirectional outward direction passing through the projection surface. Based on the rotational naked-eye 3D display using the principle of persistence of vision, it avoids the problem in the prior art that the projection direction of the projection surface is not restricted, and the observer's naked eyes receive light from all directions, resulting in visual interference and making the 3D display effect relatively floating. Instead, it can achieve a 3D display effect similar to attaching a film to the outer surface of an object, and the display effect is better than that of the rotational LED display technology in the prior art.

[0079] Although the present application has been described with reference to the current specific embodiments, those of ordinary skill in the art in this technical field should recognize that the above embodiments are only used to illustrate the present application. Various equivalent changes or substitutions can be made without departing from the spirit of the present application. Therefore, as long as the changes and modifications to the above embodiments are within the scope of the spirit of the present application, they will fall within the scope of the claims of the present application.

Claims

1. A 3D display device (100), characterized in that: The 3D display space includes a 3D space formed by a first direction, a second direction, and a third direction which are perpendicular to each other. The 3D display device (100) includes: A carrier (101), wherein the carrier (101) is provided with a plurality of optical projection units (1); wherein: Each optical projection unit (1) has a plurality of independent projection surfaces (10), the projection surfaces comprising a first projection surface (11) formed by a first direction and a second direction being perpendicular to each other, a second projection surface (12) formed by a first direction and a third direction being perpendicular to each other, and a third projection surface (13) formed by a second direction and a third direction being perpendicular to each other; The projection direction provided by the projection surface (10) of the single optical projection unit (1) is a unidirectional outward direction, the projection direction of the first projection surface (11) is a first projection direction unidirectionally outward passing through the first projection surface, the projection direction of the second projection surface (12) is a second projection direction unidirectionally outward passing through the second projection surface, and the projection direction of the third projection surface (13) is a third projection direction unidirectionally outward passing through the third projection surface; A driving unit (102), the driving unit (102) being 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) according to claim 1, characterized in that: The first projection surface (11) of the optical projection unit (1) comprises a first projection surface front side (111) and a first projection surface back side (112) whose projection directions are respectively the front side and the back side of the third direction, the second projection surface (12) comprises a second projection surface front side (121) and a second projection surface back side (122) whose projection directions are respectively the front side and the back side of the second direction, and the third projection surface (13) comprises a third projection surface front side (131) and a third projection surface back side (132) whose projection directions are respectively the front side and the back side of the first direction.

3. The 3D display device (100) according to claim 1, characterized in that: The light source (14) of the optical projection unit (1) is located inside a receiving space (15) defined by the first projection surface (11), the second projection surface (12), and the third projection surface (13); the first projection surface (11), the second projection surface (12), and the third projection surface (13) correspond to a first light source (141), a second light source (142), and a 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 a first light focusing element (161), a second light focusing element (162), and a third light focusing element (163); and the corresponding light focusing directions are a first projection direction that is unidirectionally outward, a second projection direction that is unidirectionally outward, and a third projection direction that is unidirectionally outward.

4. The 3D display device (100) according to claim 1, characterized in that: The light source (14) of the optical projection unit (1) is located on the outer surfaces of the first projection surface (11), the second projection surface (12), and the third projection surface (13); a shielding member (17) is provided between adjacent projection surfaces (10) to shield the light beams of adjacent projection surfaces (10), so that the projection direction provided by the projection surface (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 facets (1001), and shielding members (17) are provided between adjacent projection facets (1001), so that the projection direction provided by the projection surface (10) is only a unidirectional outward direction.

6. The 3D display device (100) according to claim 1, characterized in that: The optical projection unit (1) is a rotatable part on the carrier (101); the first projection surface (11), the second projection surface (12), and the third projection surface (13) are rotatable parts; 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), so that the projection surface (10) can be rotated so that the light source (14) switches its position between the inner surface and the outer surface of the projection surface (10).

7. The 3D display device (100) according to claim 1, characterized in that: The driving unit (102) comprises a driving motor capable of driving the carrier (101) to rotate around an axis (103).

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

9. The 3D display device (100) according to claim 1, characterized in that: A control circuit board (104) is arranged inside the carrier (101) and is electrically connected to the plurality of optical projection units (1) and the driving unit (102).

10. The 3D display device (100) according to claim 1, characterized in that: The light source (14) of the optical projection unit (1) comprises an LED lamp.

Images