CN110364096B - Three-dimensional display device - Google Patents
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- CN110364096B CN110364096B CN201910740477.6A CN201910740477A CN110364096B CN 110364096 B CN110364096 B CN 110364096B CN 201910740477 A CN201910740477 A CN 201910740477A CN 110364096 B CN110364096 B CN 110364096B
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- 238000003384 imaging method Methods 0.000 claims abstract description 49
- 230000001360 synchronised effect Effects 0.000 claims abstract description 4
- 230000001154 acute effect Effects 0.000 claims description 15
- 239000011324 bead Substances 0.000 claims description 7
- 230000003287 optical effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 230000002688 persistence Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B35/00—Stereoscopic photography
- G03B35/18—Stereoscopic photography by simultaneous viewing
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F19/00—Advertising or display means not otherwise provided for
- G09F19/12—Advertising or display means not otherwise provided for using special optical effects
- G09F19/18—Advertising or display means not otherwise provided for using special optical effects involving the use of optical projection means, e.g. projection of images on clouds
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- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
The invention discloses a three-dimensional display device, a projection device, which comprises an image source carrier, a light source module and a lens module, wherein the light source module rotates around a rotation axis and comprises a plurality of illuminant groups; the image source carrier is provided with a plurality of slice images which are arranged according to projection time sequence and are distributed along the circumferential direction of the rotation axis, and the shortest distance connecting lines between each slice image and the rotation axis are not overlapped; when the illuminant group rotates, each slice image is illuminated in sequence according to a projection time sequence; the imaging device is used for receiving the three-dimensional image of the projection forming body of the projection device and synchronously rotates with the light source module around the rotation axis; and the rotating mechanism realizes synchronous rotation of the light source module and the imaging device. Each slice image corresponds to a cross-sectional view of a volumetric three-dimensional image, which is finer.
Description
Technical Field
The invention relates to the technical field of three-dimensional display, in particular to a three-dimensional display device.
Background
Volumetric three-dimensional stereoscopic display is a stereoscopic display technique based on which three-dimensional images with a physical depth of field can be directly observed. Currently, three-dimensional displays of a common volume are often used for showcases. The three-dimensional display system is generally formed by four static special spectroscopes, each surface of the spectroscope faces to a display device, each display device outputs each picture information of an object to be displayed and transmits the picture information to the corresponding spectroscope, the spectroscope reflects light of each surface of the spectroscope back to human eyes, and suspended three-dimensional display is formed after picture synthesis. The display device is usually a projector, and is used for projecting and displaying the picture onto the corresponding spectroscope.
Since the three-dimensional image actually seen by the human eye on the spectroscope is actually a two-dimensional image displayed by the display device, when the human looks around the three-dimensional image, only four-angle pictures can be actually seen, corresponding to the four spectroscopes; when used for product display, the product cannot be seen in more detail, so the effect is still not good enough in practical display applications.
Disclosure of Invention
In view of this, the present invention provides a three-dimensional display device, which can solve the problem that the existing three-dimensional display device for exhibition can only display a few angles of products.
The technical scheme of the invention is realized as follows:
a volumetric three-dimensional display device comprising:
the projection device comprises an image source carrier, a light source module and a lens module, wherein the light source module rotates around a rotation axis, the light source module comprises a plurality of illuminant groups, and the illuminant groups comprise at least one illuminant which is radially distributed along the rotation axis; the image source carrier is arranged in the light emitting direction of the light source module, a plurality of slice images which are arranged according to projection time sequence and are distributed along the circumferential direction of the rotation axis are arranged on the image source carrier, and the shortest distance connecting lines between the center point of each slice image and the rotation axis are not overlapped; when the illuminant group rotates, each slice image is illuminated in sequence according to a projection time sequence; the lens module is arranged in the projection direction of the image source carrier and comprises a plurality of convex lenses respectively corresponding to the plurality of slice images;
the imaging device is used for receiving a projection forming body three-dimensional image of the projection device, the imaging device rotates synchronously with the light source module around the rotation axis, the imaging device is positioned on the upper side of the projection device and comprises a projection screen and at least one transparent mirror reflection screen matched with the projection screen, the number and the positions of the transparent mirror reflection screens correspond to those of the illuminant group, an equal acute angle included angle is formed between each transparent mirror reflection screen and the surface of the projection screen, and the body three-dimensional image is formed through optical reflection between the projection screen and the transparent mirror reflection screen and rotation matching of the imaging device;
and the rotating mechanism realizes synchronous rotation of the light source module and the imaging device.
As a further alternative of the volumetric three-dimensional display device, the included angles between the shortest distance lines between the center points of each two adjacent slice images according to the projection time sequence and the rotation axis are equal.
As a further alternative of the three-dimensional display device, the projection screen of the imaging device is a rear projection screen, and the rear projection screen is horizontally arranged above the projection device; each transparent mirror reflection screen is inclined above the rear projection screen; the bottom end of each transparent mirror reflection screen is closer to the rotation axis, and the top end of each transparent mirror reflection screen is farther from the rotation axis, so that the acute included angle is formed.
As a further alternative scheme of the three-dimensional display device, the transparent mirror reflection screens are uniformly distributed with three or four in the circumferential direction, the whole is in an inverted three-cone shape or an inverted four-cone shape, and an acute angle included angle between each transparent mirror reflection screen and the rear projection screen is 45 degrees.
As a further alternative of the three-dimensional display device, the projection screen of the imaging device is a double-sided display screen, and the double-sided display screen is vertically arranged above the projection device and coincides with the rotation axis; each surface of the double-sided display screen is provided with the transparent mirror reflection screen, each transparent mirror reflection screen is obliquely arranged, the bottom end of each transparent mirror reflection screen is far away from the rotation axis, and the top end of each transparent mirror reflection screen is close to the rotation axis, so that an acute angle included angle is formed.
As a further alternative of the volumetric three-dimensional display device, the acute included angle between each transparent specular reflection screen and the corresponding face of the two-sided display screen is 45 degrees.
As a further alternative of the volumetric three-dimensional display device, the plurality of slice images on the image source carrier enclose a ring, and when the plurality of illuminant groups rotate around the rotation axis, each slice image on the ring is illuminated in turn.
As a further alternative to the volumetric three-dimensional display device, the plurality of slice images on the image source carrier enclose a plurality of concentric circles; every two adjacent slice images are respectively distributed on different concentric rings according to the projection time sequence; when the plurality of luminous body groups rotate around the rotating shaft center, each slice image on the plurality of concentric rings is illuminated in sequence along the circumferential direction of the rotating shaft center.
As a further alternative of the three-dimensional display device, a light shielding plate is arranged between the light source module and the image source carrier, a plurality of light holes corresponding to the slice images one by one are arranged on the light shielding plate, and the slice images are illuminated through the light holes when the light emitter group rotates.
As a further alternative of the body three-dimensional display device, the three-dimensional display device further comprises a control system, wherein the rotating mechanism comprises a support column, a rotor, a cylinder body and a driving motor; the rotor is rotatably arranged outside the support column, the cylinder body is connected with the rotor, the driving motor is in driving connection with the rotor, and the driving motor is electrically connected with the control system; the image source carrier and the lens module are arranged on the support column, a channel is arranged in the support column, and the image source carrier is electrically connected to the control system through the channel; the light source module is arranged on the cylinder body, the support column is provided with a conductive slip ring, and the light source module is electrically connected with the control system through the conductive slip ring; the imaging device and the projection device are sequentially arranged in the cylinder body from top to bottom, and the imaging device is fixed on the cylinder body.
As a further alternative of the three-dimensional display device, the cylinder includes an upper cylinder and a lower cylinder, the upper cylinder is transparent, and the imaging device is disposed in the upper cylinder; the projection device is arranged in the lower cylinder; the upper cylinder body is detachably connected with the lower cylinder body.
As a further alternative of the three-dimensional display device, the rotor is provided with a plurality of rotating arms, and the plurality of illuminant groups are arranged on the plurality of rotating arms in a one-to-one correspondence manner.
As a further alternative of the volumetric three-dimensional display device, the light emitter is a light bar.
As a further alternative of the three-dimensional display device, the light emitting bodies are LED beads, the number of the light emitting bodies is one, and the positions of the light emitting bodies correspond to the positions of the circular rings.
As a further alternative of the three-dimensional display device, the light emitting bodies are LED beads, the number of the light emitting bodies is the same as that of the concentric rings, and the positions of the light emitting bodies correspond to the positions of the concentric rings.
As a further alternative of the three-dimensional display device, the control system, the rotation mechanism and the projection device are disposed in a case.
The beneficial effects of the invention are as follows: by utilizing the persistence of vision and vision fusion principle of human eyes and utilizing the rotating projection body, each slice of image projected by the projection body reaches more than twenty-four frames per second to form a three-dimensional image of the body; by adjusting the rotation speed of the imaging device, a plurality of slice images can be projected, and each slice image is equivalent to a cross-sectional view of a three-dimensional image of the body, so that the display effect of the product is better, and more detailed structures of the product are shown.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a three-dimensional display device according to a first embodiment of the present invention;
fig. 2 is an internal structure diagram of a volumetric three-dimensional display device according to a first embodiment of the present invention;
FIG. 3 is a schematic view of the projection device and the rotating mechanism;
FIG. 4 is a schematic diagram of a combination structure of a transparent specular reflection screen;
FIG. 5 is a schematic view of one of the slice images;
fig. 6 is a schematic structural diagram of the light source module according to the first embodiment;
FIG. 7 is another schematic view of the slice image;
FIG. 8 is a schematic view of the projection principle of the slice image shown in FIG. 7;
fig. 9 is a schematic structural diagram of a three-dimensional display device according to a second embodiment;
fig. 10 is an internal configuration diagram of a volumetric three-dimensional display device in the second embodiment.
In the figure: 1. a projection device; 11. an image source carrier; 111. slicing the image; 12. a light source module; 121. a light emitting body; 122. a light emitter group; 123. a rotating arm; 13. a lens module; 14. a light shielding plate; 141. a light hole; 2. an imaging device; 21. a transparent specular reflective screen; 22. a projection screen; 3. a rotating mechanism; 31. a support column; 32. a rotor; 33. a cylinder; 331. an upper cylinder; 332. a lower cylinder; 34. a driving motor; 35. a conductive slip ring; 4. a control system; 5. a box body.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
Referring to fig. 1-10, there is shown a volumetric three-dimensional display device comprising:
the projection device 1, the projection device 1 includes an image source carrier 11, a light source module 12 and a lens module 13, the light source module 12 rotates around a rotation axis, the light source module 12 includes a plurality of illuminant groups 122, the illuminant groups 122 include at least one illuminant 121 distributed along the rotation axis in radial direction; the image source carrier 11 is arranged in the light emitting direction of the light source module 12, the image source carrier 11 is provided with a plurality of slice images 111 which are arranged according to projection time sequence and are circumferentially distributed along the rotation axis, and the shortest distance connecting line between the central point of each slice image 111 and the rotation axis is not overlapped; illuminating each slice image 111 sequentially according to the projection sequence when the illuminant group 122 rotates; the lens module 13 is disposed in the projection direction of the image source carrier 11, and the lens module 13 includes a plurality of convex lenses corresponding to the plurality of slice images 111 respectively;
the imaging device 2 is used for receiving a projection forming body three-dimensional image of the projection device 1, the imaging device 2 rotates synchronously with the light source module 12 around the rotation axis, the imaging device 2 is positioned on the upper side of the projection device 1, the imaging device 2 comprises a projection screen 22 and at least one transparent mirror reflection screen 21 matched with the projection screen 22, the number and the positions of the transparent mirror reflection screens 21 are corresponding to the illuminant group 122, an equal acute angle included angle is formed between each transparent mirror reflection screen 21 and the surface of the projection screen 22, and the three-dimensional image of the projection forming body is formed through optical reflection between the projection screen 22 and the transparent mirror reflection screen 21 and the rotation matching of the imaging device 2; the convex lens of the lens module 13 may be a single convex lens or a compound convex lens.
And a rotation mechanism 3 for realizing synchronous rotation of the light source module 12 and the imaging device 2.
Specifically, the projection device 1 is used to project a plurality of slice images 111 around the rotation axis, and the imaging device 2 receives all the projections of the slice images 111 during rotation to form a three-dimensional volume image; each slice image 111 corresponds to a viewing angle of an angle on the horizontal outer side of the three-dimensional image, so that the shortest distance lines between each slice image 111 and the rotation axis cannot be overlapped, i.e. each slice image 111 represents an angle; when a three-dimensional image of a body is composed of a sufficient number of slice images 111, imaging is fine and effective; the number of slice images 111 preferably exceeds 100.
More specifically, the image source carrier 11 distributes a plurality of slice images 111 according to a projection time sequence, the light source module 12 and the imaging device 2 synchronously rotate, the number and the positions of the illuminant group 122 of the light source module 12 and the transparent mirror reflection screen 21 of the imaging device 2 are corresponding, when the illuminant group 122 and the imaging device 2 synchronously rotate under the driving of the rotating mechanism 3, the illuminant group 122 illuminates one slice image 111 when one angle, the slice image 111 is projected onto the imaging device 2 in an enlarged manner through the lens module 13, the illuminant group 122 illuminates the next slice image 111 when deflected to the next angle, and when one illuminant group 122 rotates one circle, all slice images 111 are illuminated; in order to satisfy the persistence of vision and visual fusion of the human eye, each slice image 111 should appear at least twenty times on the imaging device 2 within one second, i.e., when there is only one light emitter group 122, the light emitter group 122 needs to be rotated twenty-four turns within one second, and so on, the number of the light emitter groups 122 is inversely proportional to the rotational speed of the light emitter group 122. The transparent specular reflective screen 21 may be a transmissive and reflective material used in existing stereoscopic display systems. In addition, the said
The above-described arrangement can project a fine volumetric three-dimensional image having a plurality of viewing angles with a small number of transparent specular reflection screens 21. And the projection mode of respectively illuminating the plurality of slice images 111 can avoid the situations of imaging color formation and non-ideal gray scale caused by too fast switching between frames when the projector is used for projection.
The slice image 111 is formed by horizontally rotating a three-dimensional image of a body along a vertical center axis, and sequentially selecting sectional views, mainly outline sectional views, formed at respective rotation angles. And the cross-section is laid out within the slice image 111, the slice image 111 is preferably circular in shape; the position of the cross-sectional view in the slice image 111 is not necessarily located at the center of the slice image, and the projection position of the cross-sectional view may be adjusted by adjusting the position of the cross-sectional view in the slice image 111.
It should be noted that, the image source carrier 11 may be a film, an LCD display screen or an LCD projection chip; in addition, since each of the illuminant groups 122 should illuminate only one of the slice images 111 at a time, in order to avoid the illuminant groups 122 from being involved in illuminating other slice images 111 nearby, a light shielding plate 14 is added between the image source carrier 11 and the light source module 12, and referring to fig. 3, a plurality of light holes 141 are provided on the light shielding plate 14, each of the slice images 111 corresponds to one of the light holes 141, and the illuminant groups 122 illuminate the slice images 111 through the light holes 141 when rotating. Meanwhile, a light shielding mesh may be provided between the lens module 13 and the image source carrier 11 to achieve that the projection of each of the slice images 111 is absorbed only by the corresponding convex lens. And one image is prevented from being amplified and projected by other nearby convex lenses, and interference to the projection effect is avoided.
It should be noted that, for convenience of setting, the imaging device 2 may receive the slice images 111 at each constant angular interval, so that the fineness of the periphery of the three-dimensional image is the same, and the included angles of the lines connecting the central points of every two adjacent slice images 111 with the shortest distance between the rotation axes according to the projection time sequence are equal, that is, the angular distances of every two adjacent slice images 111 are the same.
In some specific embodiments, referring to fig. 3, the volumetric three-dimensional display device further comprises a control system 4, the rotating mechanism 3 comprising a support column 31, a rotor 32, a cylinder 33 and a drive motor 34; the rotor 32 is rotatably arranged outside the supporting column 31, the cylinder 33 is connected with the rotor 32, the driving motor 34 is in driving connection with the rotor 32, and the driving motor 34 is electrically connected with the control system 4; the image source carrier 11 and the lens module 13 are both arranged on the support column 31, a channel is arranged in the support column 31, and the image source carrier 11 is electrically connected to the control system 4 through the channel; the light source module 12 is arranged on the cylinder 33, the support column 31 is provided with a conductive slip ring 35, and the light source module 12 is electrically connected with the control system 4 through the conductive slip ring 35; the imaging device 2 and the projection device 1 are sequentially arranged in the cylinder 33 from top to bottom, and the imaging device 2 is fixed on the cylinder 33.
In short, the driving motor 34 may drive the rotor 32 through a belt transmission, the rotor 32 rotates on the support column 31, and neither the support column 31 nor the image source carrier 11 and the lens module 13 disposed on the support column 31 rotate, nor the light shielding plate 14 rotates; and the rotor 32 drives the cylinder 33 to rotate, so that the light source module 12 and the imaging device 2 synchronously rotate.
In addition, in order to reduce the assembly difficulty, the cylinder 33 may be divided into an upper cylinder 331 and a lower cylinder 332, the upper cylinder 331 is transparent, and the imaging device 2 is disposed in the upper cylinder 331; the projection device 1 is disposed in the lower cylinder 332; the upper cylinder 331 and the lower cylinder 332 are detachably connected. In order to facilitate the arrangement of the illuminant groups 122, the rotor 32 is provided with a plurality of rotating arms 123, and the illuminant groups 122 are arranged on the rotating arms 123 in a one-to-one correspondence. The control system 4, the rotating mechanism 3 and the projection device 1 are arranged in a box 5.
A more specific implementation of the imaging device 2 is shown below by way of more specific examples:
example 1
Referring to fig. 1 and 2, the projection screen 22 of the imaging device 2 is a rear projection screen, and the rear projection screen is horizontally disposed above the projection device 1; each transparent specular reflection screen 21 is inclined above the rear projection screen; the bottom end of each transparent mirror reflection screen 21 is closer to the rotation axis, and the top end is farther from the rotation axis, forming the acute included angle.
When the number of the transparent specular reflection screens 21 is two, the arrangement may be as shown in fig. 4; when the number of the transparent specular reflection screens 21 is one, the transparent specular reflection screen 21 may be reduced by one on the basis of fig. 4.
Of course, this embodiment is described in a more conventional setting manner, referring to fig. 1 and 2, the transparent mirror reflection screens 21 are uniformly distributed in four circumferential directions, and are in an inverted four-cone shape as a whole, and an acute angle between each transparent mirror reflection screen 21 and the rear projection screen is 45 degrees. At this time, the arrangement manner of the slice images 111 on the image source carrier 11 may be a distribution manner as shown in fig. 5, where the plurality of slice images 111 on the image source carrier 11 enclose a ring; since the number of the transparent specular reflection screens 21 is four at this time, the light emitter groups 122 may be arranged in such a manner that the number of the light emitter groups 122 is four as shown in fig. 6, and the light emitter groups are uniformly distributed at equal intervals in the circumferential direction as the transparent specular reflection screens 21. When the four illuminant groups 122 rotate around the rotation axis, each slice image 111 on the ring is illuminated in turn. Then, the slice image 111 at an angle is imaged on the rear projection screen, and then reflected from the rear projection screen to the transparent mirror reflection screen 21, and the human eyes can see a view angle of the three-dimensional image through the projection and reflection of the transparent mirror reflection screen 21; when the light emitter group 122 and the imaging device 2 are rotated in synchronization, the imaging device 2 can form a volumetric three-dimensional image having a plurality of viewing angles.
In practice, in order to reasonably use the position on the image source carrier 11, the arrangement manner of the slice images 111 on the image source carrier 11 may also be as shown in fig. 7, where the plurality of slice images 111 on the image source carrier 11 enclose four concentric circles; every two adjacent slice images 111 according to the projection time sequence are respectively distributed on different concentric circles; in this case, the number of the light emitter groups 122 is four, and each light emitter group 122 includes four light emitters 121 radially distributed around the rotation axis. For ease of understanding, the slice images 111 are numbered in the projection sequence n1, n2, n3, n4, m1, m2, m3, m4, and when the light emitter group 122 in fig. 7 rotates, n1, n2, n3, n4, m1, m2, m3, m4 are sequentially illuminated in the projection sequence.
It should be noted that, the projection principle of fig. 7 may refer to fig. 8, the slice images 111 have cross-sectional views for forming a volumetric three-dimensional image, and the cross-sectional views in slice images 111 on different concentric circles may be adaptively offset, so that all the cross-sectional views in slice images 111 may be projected on the same circumference of the rotation axis, so as to ensure that all the cross-sectional views are correspondingly imaged as the volumetric three-dimensional image on the imaging device 2; for example, the overlapping position S in fig. 10 is the projection overlapping position of the slice images 111 on different concentric circles, and the position of the cross-sectional view in the slice images 111 is adjusted according to the position of the overlapping position S. When the slice image 111 is in the arrangement of fig. 5, all the sectional views are the same in position in the slice image 111, i.e. can be projected on the same circumference of the rotation axis.
It should be noted that, the light emitting body 121 may be an LED lamp bead, but the position of the LED lamp bead needs to correspond to the position of the slice image 111, so that the LED lamp bead may pass through the slice image 111 when rotating; of course, in order to facilitate the arrangement of the reflector, the light-emitting body 121 may be a light bar, so that it is not necessary to precisely measure the positions of the slice images 111, and the slice images 111 at all positions in each radial direction of the rotation axis may be illuminated by the light bar, and of course, each slice image 111 is distributed in a different radial direction of the rotation axis.
Example two
Referring to fig. 9 and 10, the projection screen 22 of the imaging device 2 is a double-sided display screen, and the double-sided display screen is vertically disposed above the projection device 1 and coincides with the rotation axis; each surface of the double-sided display screen is provided with the transparent mirror reflection screen 21, the top end of each transparent mirror reflection screen 21 is contacted with the projection screen 22, the bottom end of each transparent mirror reflection screen 21 is far away from the rotation axis, and the top end is close to the rotation axis, so that the acute angle is formed. The acute angle between each transparent specular reflection screen 21 and the corresponding face of the double-sided display screen is preferably 45 degrees, but may be other than 45 degrees, as long as the transparent specular reflection screen 21 can reflect projection light to the double-sided display screen. The double-sided display screen may be a diffuse reflective screen.
The projection principle of the projection device 1 has been described in the above embodiments, so that the description thereof will not be repeated; the number of the illuminant groups 122 is two at this time, and corresponds to the number and positions of the transparent specular reflection screen 21; the arrangement of the slice images 111 may be the same as in the first embodiment; the slice image 111 is projected onto the transparent specular reflection screen 21 and then reflected onto the double-sided display screen, and the human eye can see the three-dimensional image during the rotation of the double-sided display screen.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (13)
1. A volumetric three-dimensional display device, comprising:
the projection device comprises an image source carrier, a light source module and a lens module, wherein the light source module rotates around a rotation axis, the light source module comprises a plurality of illuminant groups, and the illuminant groups comprise at least one illuminant which is radially distributed along the rotation axis; the image source carrier is arranged in the light emitting direction of the light source module, a plurality of slice images which are arranged according to projection time sequence and are distributed along the circumferential direction of the rotation axis are arranged on the image source carrier, and the shortest distance connecting lines between the center point of each slice image and the rotation axis are not overlapped; when the illuminant group rotates, each slice image is illuminated in sequence according to a projection time sequence; the lens module is arranged in the projection direction of the image source carrier and comprises a plurality of convex lenses respectively corresponding to the plurality of slice images;
the imaging device is used for receiving a projection forming body three-dimensional image of the projection device, the imaging device rotates synchronously with the light source module around the rotation axis, the imaging device is positioned on the upper side of the projection device and comprises a projection screen and at least one transparent mirror reflection screen matched with the projection screen, the number and the positions of the transparent mirror reflection screens correspond to those of the illuminant group, an equal acute angle included angle is formed between each transparent mirror reflection screen and the surface of the projection screen, and the body three-dimensional image is formed through optical reflection between the projection screen and the transparent mirror reflection screen and rotation matching of the imaging device;
the rotating mechanism realizes synchronous rotation of the light source module and the imaging device;
every two adjacent center points of the slice images according to the projection time sequence are respectively equal to the included angle of the shortest distance connecting line between the rotating axes;
the projection screen of the imaging device is a rear projection screen, and the rear projection screen is horizontally arranged above the projection device; each transparent mirror reflection screen is inclined above the rear projection screen; the bottom end of each transparent mirror reflection screen is closer to the rotation axis, and the top end of each transparent mirror reflection screen is farther from the rotation axis, so that the acute included angle is formed;
the projection screen of the imaging device is a double-sided display screen, and the double-sided display screen is vertically arranged above the projection device and coincides with the rotation axis; each surface of the double-sided display screen is provided with the transparent mirror reflection screen, each transparent mirror reflection screen is obliquely arranged, the bottom end of each transparent mirror reflection screen is far away from the rotation axis, and the top end of each transparent mirror reflection screen is close to the rotation axis, so that an acute angle included angle is formed.
2. The three-dimensional display device according to claim 1, wherein three or four transparent mirror reflection screens are uniformly distributed along the circumferential direction, the whole is in an inverted three-cone shape or an inverted four-cone shape, and an acute angle included between each transparent mirror reflection screen and the rear projection screen is 45 degrees.
3. A volumetric three-dimensional display device according to claim 2, wherein the acute included angle between each transparent specular reflective screen and the corresponding face of the two-sided display screen is 45 degrees.
4. A volumetric three-dimensional display device according to any of claims 1-3, wherein said plurality of slice images on said image source carrier define a circular ring, and wherein each of said slice images on said circular ring is illuminated in turn as said plurality of said sets of illuminators rotate about said rotational axis.
5. A volumetric three-dimensional display device according to any of claims 1-3, wherein said plurality of slice images on said image source carrier define a plurality of concentric circles; every two adjacent center points of the slice images according to the projection time sequence are respectively distributed on different concentric rings; when the plurality of luminous body groups rotate around the rotating shaft center, each slice image on the plurality of concentric rings is illuminated in sequence along the circumferential direction of the rotating shaft center.
6. The three-dimensional display device according to claim 1, wherein a light shielding plate is arranged between the light source module and the image source carrier, a plurality of light holes corresponding to the slice images one by one are arranged on the light shielding plate, and the slice images are illuminated through the light holes when the light emitter group rotates.
7. The volumetric three-dimensional display device of claim 1, further comprising a control system, the rotating mechanism comprising a support column, a rotor, a cylinder, and a drive motor; the rotor is rotatably arranged outside the support column, the cylinder body is connected with the rotor, the driving motor is in driving connection with the rotor, and the driving motor is electrically connected with the control system; the image source carrier and the lens module are arranged on the support column, a channel is arranged in the support column, and the image source carrier is electrically connected to the control system through the channel; the light source module is arranged on the cylinder body, the support column is provided with a conductive slip ring, and the light source module is electrically connected with the control system through the conductive slip ring; the imaging device and the projection device are sequentially arranged in the cylinder body from top to bottom, and the imaging device is fixed on the cylinder body.
8. The volumetric three-dimensional display device according to claim 7, wherein the barrel comprises an upper barrel and a lower barrel, the upper barrel being transparent, the imaging device being disposed within the upper barrel; the projection device is arranged in the lower cylinder; the upper cylinder body is detachably connected with the lower cylinder body.
9. The three-dimensional display device according to claim 7, wherein the rotor is provided with a plurality of rotating arms, and the plurality of light-emitting body groups are arranged on the plurality of rotating arms in a one-to-one correspondence.
10. A volumetric three-dimensional display device according to claim 1 or 7, wherein the light emitter is a light bar.
11. The three-dimensional display device according to claim 4, wherein the light emitters are LED beads, the number of the light emitters is one, and the positions of the light emitters correspond to the positions of the circular rings.
12. The three-dimensional display device according to claim 5, wherein the light emitters are LED beads, the number of the light emitters is equal to the number of the concentric circles, and the positions of the light emitters correspond to the positions of the concentric circles.
13. The volumetric three-dimensional display device of claim 7, wherein the control system, the rotating mechanism, and the projection device are disposed within a housing.
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