CN112165277A - Magnetic suspension rotating device for three-dimensional display and three-dimensional display system - Google Patents
Magnetic suspension rotating device for three-dimensional display and three-dimensional display system Download PDFInfo
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- CN112165277A CN112165277A CN202011096928.6A CN202011096928A CN112165277A CN 112165277 A CN112165277 A CN 112165277A CN 202011096928 A CN202011096928 A CN 202011096928A CN 112165277 A CN112165277 A CN 112165277A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N15/00—Holding or levitation devices using magnetic attraction or repulsion, not otherwise provided for
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/50—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images the image being built up from image elements distributed over a 3D volume, e.g. voxels
- G02B30/54—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images the image being built up from image elements distributed over a 3D volume, e.g. voxels the 3D volume being generated by moving a 2D surface, e.g. by vibrating or rotating the 2D surface
Abstract
The invention belongs to the technical field of naked eye three-dimensional display equipment, and discloses a magnetic suspension rotating device and a three-dimensional display system for three-dimensional display, wherein magnetic blocks are respectively arranged on a rotating disk and a base of the magnetic suspension rotating device for three-dimensional display; the side wall of the rotating disk is provided with a limiting mechanism which is used for keeping the central axis of the rotating disk static and is like a transverse pulley, and the magnetic suspension rotating device also comprises a power mechanism used for driving the rotating disk to rotate; the three-dimensional display system adopts a magnetic suspension structure as a rotating device, has no mechanical contact, small friction resistance, high upper limit of rotating speed and no noise, and can enlarge the display area of the three-dimensional display system and the running stability of the system; the problem that traditional mechanical revolution mechanic and revolution mechanic weight are too heavy can be solved, the problem of display area undersize can be solved through the structure of magnetic suspension, the stable balanced effect of the magnetic suspension revolution mechanic of high-speed rotation is improved, the imaging effect is improved, the working noise is reduced, and the imaging area is increased.
Description
Technical Field
The invention belongs to the technical field of naked eye three-dimensional display equipment, and particularly relates to a magnetic suspension rotating device and a three-dimensional display system for realizing screen rotation and used for three-dimensional display.
Background
At present, three-dimensional display technologies include various methods such as volumetric three-dimensional display, holographic three-dimensional display, and light field three-dimensional display, and a three-dimensional display method based on direct light scanning is also proposed, which puts in parallax images of different angles by using a high-speed rotation mode to achieve the effect of three-dimensional display.
The rotating device adopted by the traditional direct light scanning three-dimensional display system is a mechanical pulley rotating device, a driving wheel driven by a motor drives the whole device to rotate by virtue of friction force, the whole three-dimensional display system needs high rotating speed and no vibration in the operation process, but due to the gravity influence of the device, the mechanical rotating device has many limitations such as large friction resistance, small device area, lower upper limit of rotating speed, larger noise and the like.
Disclosure of Invention
Aiming at the defects of the prior art that the mechanical rotating device has large frictional resistance, small device area, low upper limit of rotating speed, high noise generation and the like, the invention provides a magnetic suspension rotating device and a three-dimensional display system for three-dimensional display.
The present invention is achieved in that, on the one hand, a magnetic levitation rotation apparatus for three-dimensional display is provided, which overcomes gravity by using magnetic force, thereby reducing frictional resistance. The magnetic suspension rotating device for three-dimensional display comprises a rotating disk (1) and a base (2); the rotating disc (1) and the base (2) are respectively provided with a magnetic block (3); the side wall of the rotating disk (1) is provided with a limiting mechanism (4) for keeping the central axis of the rotating disk (1) static, and the magnetic suspension rotating device further comprises a power mechanism (5) for driving the rotating disk (1) to rotate.
In the above solution, it is preferable that the limiting mechanism (4) includes at least three lateral supporting pulleys (400), and the supporting pulleys (400) are circumferentially distributed in the same horizontal plane.
Preferably, the rotating disc (1) comprises an extension pipe (101) and an annular disc body, the outer diameter of the extension pipe (101) is smaller than that of the disc body, the extension pipe (101) is coaxially connected to the lower surface of the disc body, the base (2) is an annular seat, and the base (2) is located below the disc body and coaxially sleeved outside the extension pipe (101); the supporting pulley (400) is positioned between the outer wall of the extension pipe (101) and the inner wall of the base (2).
It is also preferable that a vertical rotating shaft (401) is arranged at the center of the supporting pulley (400), and the supporting pulley (400) is installed on the base (2) or on the extension pipe (101) through the rotating shaft (401); the bottom surface of the tray body and the top surface of the base (2) are respectively provided with a circular magnet or an annular embedded groove (302), and the embedded grooves (302) are respectively internally provided with a magnetic block (3); the number of the annular magnets or the embedded grooves (302) for mounting the magnetic blocks (3) on the bottom surface of the tray body is one or at least two; the number of the annular magnets or the embedded grooves (302) for installing the magnetic blocks (3) on the top surface of the base (2) is one or at least two.
Preferably, a sunken installation groove (201) is formed in the inner wall of the base (2), and the upper end and the lower end of the rotating shaft (401) are respectively arranged in shaft holes in the upper side wall and the lower side wall of the installation groove (201); or the upper end and the lower end of the rotating shaft (401) are respectively arranged in the shaft holes of the transverse mounting plates (402), and the mounting plates (402) are connected to the outer wall of the extension pipe (101); cover rings (301) covering the edges of the magnetic blocks (3) are mounted on the disk body at the magnetic blocks (3) and the base (2).
Preferably, the number of the limiting mechanisms (4) is at least two layers, and the limiting mechanisms (4) at least two layers are distributed up and down.
It is also preferable that the supporting pulleys (400) of the limiting mechanisms (4) of at least two layers are uniformly distributed at intervals.
Preferably, the power mechanism (5) is a transverse friction wheel (500), the outer wall of the friction wheel (500) is in contact with the outer wall of the extension pipe (101), a vertical driving shaft is arranged at the center of the friction wheel (500), and a rotating output shaft of the rotating motor (6) is in driving connection with the driving shaft.
It is also preferable that an outer wall of one or at least two supporting pulleys (400) is in contact with an outer wall of the extension pipe (101), and the supporting pulleys (400) whose outer wall is in contact with the outer wall of the extension pipe (101) constitute the friction wheel (500).
The invention provides a three-dimensional display system, which comprises a projector (7), a collimating lens (8) and a holographic scanning screen (9) which are sequentially arranged from bottom to top; the holographic scanning screen (9) is mounted on the rotating disk (1) of a three-dimensional display magnetically levitated rotating apparatus according to an aspect of the present invention.
When the magnetic suspension rotating device and the three-dimensional display system for three-dimensional display are used, the method comprises the following steps,
starting a rotating motor (6) to enable the rotating motor (6) to drive a friction wheel (500) to rotate so as to drive the rotating disk (1) and the holographic scanning screen (9) to rotate through the friction wheel (500);
the projector (7) is started to project continuous two-dimensional images, the holographic scanning screen (9) deflects the projection light rays of the two-dimensional images emitted by the projector (7) according to the azimuth of an observer, and meanwhile, the rotary disk (1) drives the holographic scanning screen (9) to rotate for 360 degrees, so that the projection light rays scan for 360 degrees of the holographic scanning screen (9), the two-dimensional images projected in all directions are observed by human eyes in the 360-degree direction, and the three-dimensional display of the three-dimensional images is realized.
The advantages of the invention are as follows:
the magnetic suspension rotating device for three-dimensional display and the three-dimensional display system solve the defects of large friction resistance, small device area, lower upper limit of rotating speed, higher noise generation and the like of the mechanical rotating device in the prior art through the magnetic suspension rotating device for three-dimensional display; the gravity of the rotating disc is overcome by magnetic force, so that the rotating disc can suspend for a certain height relative to the base, and the effect of greatly reducing the influence of frictional resistance is realized, thereby solving the problems that the imaging effect is influenced by vibration, the noise is large, the imaging display area is small and the like in the traditional mechanical rotating mode; in addition, the magnetic field supporting device has the advantages that the magnetic field can provide non-contact supporting force and reduce noise caused by mechanical structures, overcomes the defect of unsteady balance force of buoyancy of the magnetic field through the supporting pulleys, and can provide necessary auxiliary support near a balance point. The three-dimensional display system can solve the problems of small view field, poor visual effect, too small area of a rotary screen, lower rotating speed, high noise and image jitter of the traditional three-dimensional display system adopting a mechanical rotary structure.
Drawings
Fig. 1 is a schematic structural view of a magnetic levitation rotating apparatus for three-dimensional display according to the present invention.
Fig. 2 is a schematic structural view of a rotating disk of the magnetic levitation rotating apparatus for three-dimensional display according to the present invention.
Fig. 3 is a schematic structural diagram of a base of a magnetic levitation rotating apparatus for three-dimensional display according to the present invention.
Fig. 4 is a schematic structural diagram of a combination of a rotating disk and a base of the magnetic levitation rotating device for three-dimensional display according to the present invention.
Fig. 5 is a sectional view of a rotating disk and a supporting pulley of the magnetically levitated rotating apparatus for three-dimensional display according to the present invention.
Fig. 6 is a plan view of an extension pipe and a supporting pulley of the magnetically levitated rotary apparatus for three-dimensional display according to the present invention.
Fig. 7 is a sectional view showing that the supporting pulley of the magnetic levitation rotating apparatus for three-dimensional display of the present invention is mounted on the base.
Fig. 8 is a sectional view of the supporting pulley of the magnetic levitation rotating apparatus for three-dimensional display according to the present invention mounted on an extension pipe.
Fig. 9 is a partial sectional view of a cover ring on a rotating disk of a magnetic levitation rotating apparatus for three-dimensional display according to the present invention.
Fig. 10 is a bottom view of a cover ring on a rotating disk of the magnetic levitation rotating apparatus for three-dimensional display according to the present invention.
Fig. 11 is a partial sectional view of a cover ring on a base of a magnetic levitation rotating apparatus for three-dimensional display according to the present invention.
Fig. 12 is a top view of a cover ring on a base of a magnetically levitated rotary device for three-dimensional display according to the present invention.
Fig. 13 is a schematic structural diagram of a three-dimensional display system according to the present invention.
In the figure, 1 is a rotating disk, 101 is an extension tube, 2 is a base, 201 is a mounting groove, 3 is a magnetic block, 301 is a cover ring, 302 is an embedded groove, 303 is a screw, 4 is a limiting mechanism, 400 is a supporting pulley, 401 is a rotating shaft, 402 is a mounting plate, 5 is a power mechanism, 500 is a friction wheel, 6 is a rotating motor, 7 is a projector, 8 is a collimating lens, 9 is a holographic scanning screen, and 10 is a diffusion plate.
Detailed Description
The following description of the embodiments of the present invention refers to the accompanying drawings and examples:
example 1:
the magnetic suspension rotating device for three-dimensional display, referring to fig. 1, comprises a rotating disk 1 and a base 2; the rotary disk 1 and the base 2 are respectively provided with a magnetic block 3; the side wall of the rotating disk 1 is provided with a limiting mechanism 4 for keeping the central axis of the rotating disk 1 stationary, and the magnetic suspension rotating device further comprises a power mechanism 5 for driving the rotating disk 1 to rotate.
In the magnetic suspension rotating device for three-dimensional display of the embodiment, the magnetic blocks 3 are used for enabling the rotating disk 1 and the base 2 to generate magnetic repulsion, so that the rotating disk 1 can be suspended. Meanwhile, the power mechanism 5 drives the rotating disc 1 to rotate, and the limiting mechanism 4 keeps the central axis of the rotating disc 1 stationary, that is, for example, the central axis of the rotating disc 1 is vertical, so that the central axis of the rotating disc 1 is kept vertical through the limiting mechanism 4 in the rotating motion process. The magnetic suspension rotating device for three-dimensional display of the embodiment adopts a magnetic suspension structure as a rotating device, and the gravity of a rotating disk is borne by magnetic force, so that compared with a mechanical rotating device, the magnetic suspension rotating device has the advantages of small friction resistance, high upper limit of rotating speed, no noise and the like, and can enlarge the display area of the whole three-dimensional display system and improve the running stability of the system; the problem that the weight of a rotating structure of a traditional mechanical rotating structure is too heavy can be solved, the problem that the display area is too small can be solved through the structure of magnetic suspension, and the stable balance effect of the magnetic suspension rotating structure rotating at a high speed is improved.
Example 2:
the magnetic levitation rotation device for three-dimensional display is similar to embodiment 1, except that, referring to fig. 5, the limiting mechanism 4 includes at least two lateral supporting pulleys 400, and the supporting pulleys 400 are uniformly distributed along the circumference in the same horizontal plane, that is, when there are two supporting pulleys 400, the connecting line between the central points of the two supporting pulleys 400 is a horizontal straight line. At this time, it is preferable that the number of the limiting mechanisms 4 is at least two, and the at least two layers of the limiting mechanisms 4 are distributed up and down. That is, in this case, it is preferable that the limiting mechanism 4 includes at least two layers of the supporting pulleys 400, the number of the supporting pulleys 400 in each layer is at least two, and the supporting pulleys 400 of the limiting mechanism 4 in at least two layers are uniformly spaced. That is, the supporting pulleys 400 of the upper layer are located above the middle position of the space between the adjacent supporting pulleys 400 of the lower layer. For example, the number of the limiting mechanisms 4 is two layers of supporting pulleys 400 distributed up and down, the number of each layer of supporting pulleys 400 is two, and the four supporting pulleys 400 of the two layers of limiting mechanisms 4 are uniformly distributed at intervals along the circumference.
Referring to fig. 5 and 6, it is still further possible that the limiting mechanism 4 includes at least three lateral supporting pulleys 400, and the supporting pulleys 400 are uniformly distributed along the circumference in the same horizontal plane. For example, the limiting mechanism 4 includes three lateral supporting pulleys 400, that is, the number of the supporting pulleys 6 located on the same circumferential plane may be three, and the three supporting pulleys 6 are uniformly distributed, that is, an included angle between a connecting line between a central point of the three supporting pulleys 6 and a central point of the circumferential plane where the three supporting pulleys are located is 120 °. At this time, the number of the limiting mechanisms 4 may also be at least two layers, at least two layers of the limiting mechanisms 4 are distributed up and down, and the supporting pulleys 400 of at least two layers of the limiting mechanisms 4 are preferably distributed at even intervals.
In the magnetic levitation rotating apparatus for three-dimensional display of the present embodiment, the magnetic levitation force can support the weight of the rotating disk 1 at the equilibrium point of the magnetic levitation force, but the supporting force is lost after slightly deviating from the supporting point. At least two transverse supporting pulleys 400 which are uniformly distributed are arranged between the outer wall of the extension pipe 101 and the inner wall of the base 2, and the limiting mechanism 4 can limit the central position of the extension pipe so as to ensure that the rotating disc 1 is always at the balance point position, i.e. the rotating disc 1 is constrained at the balance point; the supporting device has the advantages that the supporting device does not need to bear gravity, only needs to maintain the central position of the rotating disc 1, needs small supporting force and can realize ideal stable balance effect; namely, besides the advantages that the magnetic field can provide a non-contact supporting force and reduce the noise caused by the mechanical structure, the magnetic suspension structure can overcome the defect that the magnetic field buoyancy of the magnetic suspension structure in the prior art is unstable balance force, and auxiliary support can be needed near the balance point, namely, the effect of ensuring that the rotating disk 1 is always at the balance point position through the supporting pulley 400 is achieved.
Example 3:
a magnetic suspension rotating device for three-dimensional display, similar to any of the above embodiments, except that, referring to fig. 2 to 4, a rotating disc 1 comprises an extension pipe 101 and an annular disc body, the outer diameter of the extension pipe 101 is smaller than that of the disc body, the extension pipe 101 is coaxially connected below the disc body, a base 2 is an annular seat, and the base 2 is located below the disc body and coaxially sleeved outside the extension pipe 101; the supporting pulley 400 is located between the outer wall of the extension pipe 101 and the inner wall of the base 2.
Further, a vertical rotating shaft 401 is arranged at the center of the supporting pulley 400, and the supporting pulley 400 is mounted on the base 2 or on the extension pipe 101 through the rotating shaft 401; the bottom surface of the disk body and the top surface of the base 2 are respectively provided with a circular magnet or an annular embedded groove 302, and the embedded grooves 302 are respectively internally provided with a magnetic block 3; the number of the annular magnets or the embedded grooves 302 for mounting the magnetic blocks 3 on the bottom surface of the tray body is one or at least two; the number of the ring-shaped magnets or the insertion grooves 302 for mounting the magnetic blocks 3 on the top surface of the base 2 is one or at least two.
That is, the number of the circular ring-shaped magnets or the embedded grooves 302 for mounting the magnetic blocks 3 on the bottom surface of the tray body can be one or more, and similarly, the number of the circular ring-shaped magnets or the embedded grooves 302 for mounting the magnetic blocks 3 on the top surface of the base 2 can also be one or more; the magnetic buoyancy of magnetic suspension can be ensured.
At this time, when the number of the circular ring-shaped magnets or the insertion grooves 302 in which the magnetic blocks 3 are installed is at least two, the plurality of circular ring-shaped magnets or the insertion grooves 302 are preferably of a concentric structure, and the plurality of circular ring-shaped magnets or the insertion grooves 302 are preferably uniformly distributed.
Still further, referring to fig. 7, a recessed mounting groove 201 is provided on the inner wall of the base 2, and the upper end and the lower end of the rotating shaft 401 are respectively disposed in the shaft holes of the upper side wall and the lower side wall of the mounting groove 201; alternatively, referring to fig. 8, the upper end and the lower end of the rotating shaft 401 are respectively disposed in the shaft holes of the transverse mounting plates 402, and the mounting plates 402 are both connected to the outer wall of the extension pipe 101; referring to fig. 9 to 12, the magnetic block 3 and the base 2 are both provided with a cover ring 301 covering the edge of the magnetic block 3. The rotating disk 1 and the magnetic block 3 are pressed and fixed by the cover ring 301 after being assembled, and the base 2 is also assembled with the magnetic block 3 in a manner of pressing and fixing by the cover ring 301.
At this time, the edge of the supporting pulley 6 is located in the mounting groove 201.
More specifically, the magnetic block 3 may be connected to the bottom surface of the rotating disk 1 and the top surface of the base 2 by a glue layer or a bolt, or the ring-shaped magnet may be connected to the embedded groove 302 by a glue layer or a bolt.
More specifically, the inner diameter of the tray body may be equal to the inner diameter of the extension pipe 101, and the central axis of the extension pipe 101 may coincide with the central axis of the tray body.
Example 4:
the magnetic suspension rotating device for three-dimensional display is similar to any one of the above embodiments, except that the power mechanism 5 is a transverse friction wheel 500, the outer wall of the friction wheel 500 is in contact with the outer wall of the extension pipe 101, a vertical driving shaft is arranged at the center of the friction wheel 500, and a rotating output shaft of the rotating motor 6 is in driving connection with the driving shaft.
Further, an outer wall of one or at least two supporting pulleys 400 is in contact with an outer wall of the extension pipe 101, and the supporting pulleys 400 whose outer wall is in contact with the outer wall of the extension pipe 101 constitute the friction wheel 500. The outer wall of the supporting pulley 400, which serves only as a limit support, may also be in contact with the outer wall of the extension pipe 101.
In the magnetic suspension rotating device for three-dimensional display of the embodiment, the extension pipe 101 at the lower part of the rotating disk 1 extends into the base 2; the magnetic blocks 3 are used for enabling the rotating disk 1 and the base 2 to generate magnetic repulsion force, and enabling the rotating disk 1 to be suspended. The rotating disk 1 is placed right above the base 2, because the magnetic blocks 3 on the upper surface and the bottom surface of the rotating disk 1 and the magnetic blocks 3 on the lower surface and the top surface of the base 2 have the same relative magnetic pole direction, magnetic repulsion is generated to enable the rotating disk 1 to suspend at a certain height, and meanwhile, the rotating motor 4 drives the friction wheel 500 and the friction wheel 500 drives the extension pipe 101 and the rotating disk 1 to rotate; the magnetic suspension structure is adopted as a rotating device, the gravity of the rotating disk is born by magnetic force, and compared with a mechanical rotating device, the magnetic suspension rotating device has the advantages of small friction resistance, high upper limit of rotating speed, no noise and the like, and can enlarge the display area of the whole three-dimensional display system and realize the stability of system operation.
The magnetic suspension rotating device for three-dimensional display of the above embodiment may also be more specifically, the rotating disk 1, the base 2 and the cover ring 7 may be made of materials that are not easily magnetized, such as aluminum alloy. The rotating disc 1 may be an annular disc and the extension pipe 101 may be a vertical circular pipe. The base 2 may be vertically round tubular. The tank bottom surface of mounting groove 201 can be the arcwall face, and support pulley 400 is horizontal disc wheel, and the outer wall that supports pulley 400 also can be for the bellied arcwall face in the outside to avoid the tank bottom surface of mounting groove 201 and the outer wall production of support pulley 400 to run into the damage. The rotating motor 4 may be mounted on a motor base. The magnetic block 3 may be a rectangular block. The friction wheel 500 may be a transverse disc wheel. The outer wall of the friction wheel 500 may be an arc-shaped surface that is convex to the outside and contacts the outer wall of the extension pipe 101. End plates may be attached to both ends of the rotating shaft 401 to prevent the rotating shaft 401 from sliding out. The mounting plate 402 may be a rectangular plate, the mounting plate 402 may be connected to the extension pipe 101 by welding or bolts, and the side of the mounting plate 402 connected to the extension pipe 101 may be a concave arc-shaped surface matched with the outer wall of the extension pipe 101.
Annular embedded grooves 302 are respectively formed in the bottom surface of the tray body and the top surface of the base 2, and magnetic blocks 3 are respectively installed in the embedded grooves 302; the number of the embedding grooves 302 on the bottom surface of the tray body is one or at least two; when the number of the embedded grooves 302 on the top surface of the base 2 is one or at least two, as shown in fig. 10 and 12, the embedded grooves 302 may be circular grooves concentric with the bottom surface of the rotating disk 1 and the top surface of the base 2, the magnetic blocks 3 are rectangular blocks, the number of the magnetic blocks 3 is at least two, the magnetic blocks are densely embedded in the embedded grooves 302, and the magnetic blocks 3 may be arranged in the whole embedded grooves 302. The cover ring 301 can be a circular ring concentric with the embedded groove 302, the cover ring 301 covers the edges of the magnetic block 3 and the embedded groove 302 to block the magnetic block 3, the magnetic block 3 is prevented from falling off from the embedded groove 302, and the cover ring 301 can be connected with the bottom surface of the rotating disk 1 and the top surface of the base 2 through a glue layer or welding or screws 303. Each cover ring 301 may be connected to the bottom surface of the rotary disk 1 and the top surface of the base 2 by at least three screws 303 evenly distributed along the circumference. In addition, in order to improve the stabilizing effect of the magnetic suspension structure, the number of the magnetic blocks 3 on the base 2 may be greater than the number of the magnetic blocks 3 on the rotating disk 1, or specifically, the number of the magnetic blocks 3 on the base 2 may be an integral multiple of the number of the magnetic blocks 3 on the rotating disk 1, for example, the number of the magnetic blocks 3 on the base 2 may be three times the number of the magnetic blocks 3 on the rotating disk 1. Or, three concentric embedded grooves 302 are arranged on the top surface of the base 2, one embedded groove 302 is arranged on the bottom surface of the rotating disk 1, the number of the magnetic blocks 3 in each embedded groove 302 is the same and is uniformly distributed, or the magnetic blocks 3 in each embedded groove 302 are densely arranged in the embedded grooves 302.
Similarly, the bottom surface of the disk body and the top surface of the base 2 are respectively provided with one or at least two annular magnets; when the number of the ring-shaped magnets on the top surface of the base 2 is one or at least two, the number of the ring-shaped magnets on the base 2 may be different from the number of the ring-shaped magnets on the rotating disk 1. Specifically, the number of the ring-shaped magnets on the base 2 may be an integral multiple of the number of the ring-shaped magnets on the rotating disk 1, or the number of the ring-shaped magnets on the rotating disk 1 may be an integral multiple of the number of the ring-shaped magnets on the base 2. For example, the number of ring magnets on the base 2 may be three times the number of ring magnets on the rotating disk 1; or the number of the ring-shaped magnets on the rotating disk 1 may be three times that of the ring-shaped magnets on the base 2.
Example 5:
the three-dimensional display system, see fig. 13, includes a projector 7, a collimating lens 8 and a holographic scanning screen 9, which are placed in sequence from bottom to top; the holographic scanning screen 9 is installed on the rotating disk 1 of the three-dimensional display magnetic suspension rotating device according to any one of the above embodiments.
In fig. 13, an arrow shows a state where the magnetic suspension rotating apparatus for three-dimensional display of the above embodiment drives the holographic scanning screen 9 to rotate 360 °; in fig. 12, the hatching of the grid indicates the projected light region.
Reference to the human eye is the principle of seeing three-dimensional objects: the three-dimensional object seen by human eyes at a certain angle or position at a certain moment is actually only a two-dimensional image, the two-dimensional image can change along with the change of the observation angle or position, and the brain traces out the three-dimensional shape of the observed object according to the sequence of the two-dimensional images observed at different angles or positions and the life experience of the brain, so that the three-dimensional shape of the observed object is reflected in the subjective consciousness of people. According to this principle, if a series of two-dimensional images captured at different angles or positions of an object can be displayed along the respective angles or positions, the human eye can reflect the same three-dimensional image in the brain when observing the images at the different angles or positions. That is, if two-dimensional images in respective directions can be displayed in the 360 ° direction, an omnidirectional stereoscopic image display effect can be achieved. If the omnidirectional three-dimensional display effect is to be realized, a spatial light modulation device and a scanning device are needed, and different two-dimensional images are displayed according to different angles under the synchronous cooperation of the two devices. In accordance with the human eye's requirements for viewing video and color (60 frames/second), spatial light modulators for image projection displays must be high speed. The light scanning device is used for realizing two-dimensional image display in a direction angle of 360 degrees.
In the three-dimensional display system of the present embodiment, the projector 7 serves as a scanning device, and the collimator lens 8 serves as a spatial light modulation device; when the three-dimensional display system of the embodiment is used, the rotating motor 6 is firstly started, so that the rotating motor 6 drives the friction wheel 500 to rotate, and the rotating disk 1 and the holographic scanning screen 9 are driven to rotate through the friction wheel 500; and then starting the projector 7 to project continuous two-dimensional images, so that the holographic scanning screen 9 deflects the projection light rays from the two-dimensional images emitted by the projector 7 according to the azimuth of an observer, and simultaneously, the rotary disk 1 drives the holographic scanning screen 9 to rotate by 360 degrees to scan the holographic scanning screen 9 by the projection light rays by 360 degrees, so that human eyes can observe the two-dimensional images projected in all directions in 360 degrees, and the three-dimensional display of the three-dimensional images is realized.
The three-dimensional display system of the present embodiment can solve the problem that the rotating structure of the mechanical rotating structure in the conventional three-dimensional display system is too heavy, and can solve the problem that the display area is too small through the structure of the magnetic suspension, by adopting the magnetic suspension rotating device for three-dimensional display of the above-mentioned embodiment, and more importantly, by adopting the specific structure of the magnetic suspension rotating device for three-dimensional display in the above-mentioned embodiment, the stable balance effect of the magnetic suspension rotating structure rotating at high speed is improved. It is through the magnetic suspension rotary device who is used for three-dimensional demonstration of above-mentioned embodiment for a section height of rotary disk 1 for base 2 suspension reaches the effect that frictional resistance influences that significantly reduces, thereby solves the vibration influence imaging effect that traditional mechanical revolution mechanic exists, and the noise is big and the formation of image display area is less scheduling problem, makes the three-dimensional display system of this embodiment can reach the three-dimensional display effect of a large tracts of land high rotational speed.
The control of the whole system of the three-dimensional display system of the embodiment can be realized by a chopper arranged on the synchronous holographic scanning screen 9, the chopper provides a periodic signal (the period is that the rotating disk 1 rotates for a circle) and an indexing signal (the indexing is that the rotating disk 1 rotates for an angle value larger than 0 degree and smaller than 90 degrees), the projector 7 displays a first image after receiving the periodic signal according to the sequence of the images of all angles arranged in advance, and automatically switches the displayed image after receiving the indexing signal until receiving the next periodic signal.
Further, the three-dimensional display magnetic suspension rotating device is arranged on a support.
In a still more specific embodiment, the base 2 of the three-dimensional display magnetic levitation rotating device is mounted on a support. It is also possible that the collimator lens 8 is mounted on a support. The projector 7 may be mounted on a placement table. The support can include landing leg post and extension board, and its landing leg post's quantity is three at least, and evenly distributed, and the landing leg post can set up in the outside of placing the platform, and the upper end at the landing leg post is connected to the extension board. The support plate may be an annular plate, the base 2 may be mounted at the annular inner diameter of the support plate, and the collimating lens 8 may be mounted at the annular inner diameter of the base 2 and the support plate.
It should be noted that the holographic scanning screen 9 is installed on the rotating disk 1 of the three-dimensional display magnetic suspension rotating device, and the rotating disk 1 drives the holographic scanning screen to rotate.
Example 6:
a three-dimensional display system is similar to that of example 5 except that, referring to fig. 13, a holographic scanning screen 9 is provided with a diffusion preventing plate 10 for preventing lateral dispersion of light.
At this time, the holographic scanning screen 9 deflects the projection light of the image emitted by the projector 7 according to the azimuth of the observer, and simultaneously, the holographic scanning screen 9 and the diffusion preventing plate 10 rotate together to realize 360-degree scanning, so that the two-dimensional images projected in the respective directions can be observed by human eyes in the 360-degree direction.
It should be noted that the diffusion preventing plate 10 has a transmission function, and functions to prevent lateral diffusion of light. The diffusion preventing plate 10 may be a circular plate. An anti-diffusion plate 10 may be placed on top of the holographic scanning screen 9. The bottom surface of the diffusion preventing plate 10 and the top surface of the holographic scanning screen 9 may be connected by an optical cement.
Although the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.
Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, but only by the scope of the appended claims.
Claims (10)
1. The magnetic suspension rotating device for three-dimensional display comprises a rotating disk (1) and a base (2); the magnetic disc is characterized in that the rotary disc (1) and the base (2) are respectively provided with a magnetic block (3); the side wall of the rotating disk (1) is provided with a limiting mechanism (4) for keeping the central axis of the rotating disk (1) static, and the magnetic suspension rotating device further comprises a power mechanism (5) for driving the rotating disk (1) to rotate.
2. The magnetic levitation rotation apparatus for three-dimensional display as claimed in claim 1, wherein the position limiting mechanism (4) comprises at least three lateral support pulleys (400), the support pulleys (400) being circumferentially distributed in the same horizontal plane.
3. The magnetic levitation rotating apparatus for three-dimensional display as recited in claim 2, wherein the rotating disk (1) comprises an extension tube (101) and an annular disk body, the outer diameter of the extension tube (101) is smaller than the outer diameter of the disk body, the extension tube (101) is coaxially connected below the disk body, the base (2) is an annular seat, the base (2) is located below the disk body and coaxially sleeved outside the extension tube (101); the supporting pulley (400) is positioned between the outer wall of the extension pipe (101) and the inner wall of the base (2).
4. The magnetic levitation rotating apparatus for three-dimensional display as recited in claim 3, wherein a vertical rotating shaft (401) is provided at the center of the supporting pulley (400), and the supporting pulley (400) is installed on the base (2) or on the extension pipe (101) through the rotating shaft (401); the bottom surface of the tray body and the top surface of the base (2) are respectively provided with a circular magnet or an annular embedded groove (302), and the embedded grooves (302) are respectively internally provided with a magnetic block (3); the number of the annular magnets or the embedded grooves (302) for mounting the magnetic blocks (3) on the bottom surface of the tray body is one or at least two; the number of the annular magnets or the embedded grooves (302) for installing the magnetic blocks (3) on the top surface of the base (2) is one or at least two.
5. The magnetic levitation rotating apparatus for three-dimensional display as claimed in claim 4, wherein a recessed mounting groove (201) is provided on an inner wall of the base (2), and an upper end and a lower end of the rotating shaft (401) are respectively provided in shaft holes of an upper sidewall and a lower sidewall of the mounting groove (201); or the upper end and the lower end of the rotating shaft (401) are respectively arranged in the shaft holes of the transverse mounting plates (402), and the mounting plates (402) are connected to the outer wall of the extension pipe (101); cover rings (301) covering the edges of the magnetic blocks (3) are mounted on the disk body at the magnetic blocks (3) and the base (2).
6. The magnetic levitation rotating device for three-dimensional display as recited in claim 1, wherein the number of the limiting mechanisms (4) is at least two layers, and at least two layers of the limiting mechanisms (4) are distributed up and down.
7. The magnetic levitation rotating apparatus for three-dimensional display as recited in claim 6, wherein the supporting pulleys (400) of the limiting mechanisms (4) of at least two layers are evenly spaced.
8. The magnetic levitation rotating device for three-dimensional display as recited in claim 3, wherein the power mechanism (5) is a transverse friction wheel (500), the outer wall of the friction wheel (500) is in contact with the outer wall of the extension pipe (101), a vertical driving shaft is arranged at the center of the friction wheel (500), and the rotating output shaft of the rotating motor (6) is in driving connection with the driving shaft.
9. The magnetic levitation rotating apparatus for three-dimensional display as recited in claim 8, wherein an outer wall of one or at least two supporting pulleys (400) is in contact with an outer wall of the extension pipe (101), and the supporting pulleys (400) whose outer wall is in contact with the outer wall of the extension pipe (101) constitute the friction wheel (500).
10. The three-dimensional display system comprises a projector (7), a collimating lens (8) and a holographic scanning screen (9) which are sequentially arranged from bottom to top; characterized in that the holographic scanning screen (9) is mounted on the rotating disk (1) of a magnetically levitated rotating apparatus for three-dimensional display according to any of claims 1-9.
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