CN211742538U - Rotary LED stereo display device - Google Patents
Rotary LED stereo display device Download PDFInfo
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- CN211742538U CN211742538U CN202020581101.3U CN202020581101U CN211742538U CN 211742538 U CN211742538 U CN 211742538U CN 202020581101 U CN202020581101 U CN 202020581101U CN 211742538 U CN211742538 U CN 211742538U
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- fixing frame
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- glass cover
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Abstract
The utility model belongs to the technical field of 3D display advertisements, in particular to a rotary LED three-dimensional display device, which comprises a glass cover; the motor is fixed in the center of the glass cover bottom plate; the lamp bead fixing frame is positioned in the glass cover, the upper end of the lamp bead fixing frame is rotationally connected with the glass cover, and the lower end of the lamp bead fixing frame is fixedly connected with an output shaft of the motor; the lamp bead plate is arranged on the lamp bead fixing frame, and a plurality of lamp beads are uniformly distributed on the lamp bead plate; and the central control panel is arranged at the bottom of the lamp bead fixing frame and is in control connection with the lamp bead plate. The utility model discloses can both watch the 3D effect from each angle, just as a material object suspension is in the sky, reaches the hi-lite moreover to the form of vwatching the post supplies people to vwatch, is applicable to occasions such as square, scenic spot, indoor hall.
Description
Technical Field
The utility model belongs to the technical field of the advertisement that 3D shows, in particular to rotatory LED stereoscopic display device.
Background
Current 3D display technologies are evolving into multiple orientations such as virtual display (VR), naked eye 3D, water curtain movies, and also rotating fan three-dimensional displays. The existing rotating fan type display technology is based on the persistence of vision of human eyes, changes the sequence and the color of an LED (light emitting diode) light when rotating, and finally forms a complete picture through rotating and combining.
The existing rotating fan type three-dimensional display has the following defects:
1. it is essentially a two-dimensional display, except that as the fan rotates, the fan leaves substantially invisible, leaving only the planar pattern generated by the LED light sources on the fan, giving the person the image of the picture floating in the air, and if the picture changes slightly, the person will feel like 3D, but if looking from other directions (not looking from the front), its visual effect disappears (it can only be seen from the front).
2. The brightness is not sufficient and the display effect of the prior art products is deteriorated if there is a light source, especially if the display effect is very poor under normal outdoor lighting.
Disclosure of Invention
In order to solve the problem that exists among the prior art, the utility model provides a rotatory LED stereoscopic display device can both watch the 3D effect from each angle, just as a real object suspension is in the air the same, reaches the hi-lite moreover to the form of vwatching the post supplies people to vwatch, is applicable to occasions such as square, scenic spot, indoor hall.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a rotatory LED stereoscopic display device, include:
a glass cover;
the motor is fixed in the center of the glass cover bottom plate;
the lamp bead fixing frame is positioned in the glass cover, the upper end of the lamp bead fixing frame is rotationally connected with the glass cover, and the lower end of the lamp bead fixing frame is fixedly connected with an output shaft of the motor;
the lamp bead plate is arranged on the lamp bead fixing frame, and a plurality of lamp beads are uniformly distributed on the lamp bead plate;
and the central control panel is arranged at the bottom of the lamp bead fixing frame and is in control connection with the lamp bead plate.
Further, still include the support frame, the support frame is fixed on the bottom plate of glass cover, the output shaft of motor passes through the fixed pivot of bearing and lamp pearl mount lower extreme and is connected.
Further, still including installing the hall sensor of lamp pearl mount bottom both sides and with the supporting magnet of hall sensor, magnet is fixed in the top of support frame, hall sensor is connected with central control panel.
The carbon brush is fixed above the supporting frame, the conducting ring is fixed on a rotating shaft at the lower end of the lamp bead fixing frame and is in contact with the carbon brush, 220 alternating current is output by the conducting ring, the 220 alternating current is changed into 5V direct current through a switching power supply arranged on the lamp bead fixing frame, and the 5V direct current supplies power for the central control board and the lamp bead board.
Furthermore, the lamp bead plate comprises a plurality of lamp bead unit plates which are cascaded through a flat cable, and each lamp bead unit plate comprises a lamp bead driving chip and a plurality of lamp beads; a plurality of ventilation strips are arranged on the lamp bead plate at intervals in the transverse direction.
Further, the bluetooth speaker is embedded in the bottom plate of the glass cover.
Furthermore, the central control board comprises a main control chip FPGA, and a WIFI module, a storage chip, a power module, a Bluetooth audio module and a network interface chip which are respectively connected with the main control chip FPGA; the WIFI module is used for receiving program information sent by the remote terminal, the storage chip is used for storing RGB data in the corresponding storage chip respectively, the Bluetooth audio module is used for connecting a Bluetooth sound box, and the network port chip is used for cascading a next-level central control panel.
Further, still include moving mechanism, moving mechanism adopts the high-frequency response electro-magnet, the high-frequency response electro-magnet symmetry is installed on the upper beam and the underbeam of lamp pearl mount, the telescopic link and the lamp pearl board upper and lower end fixed connection of high-frequency response electro-magnet, all offer on the left montant of lamp pearl mount and the right montant and be used for the gliding guide slot of lamp pearl board.
Compared with the prior art, the utility model has the advantages of it is following:
the existing common 3D rotating fan or 3D film can only display the 3D effect from the front side, and the 3D effect cannot be viewed from other directions. The utility model discloses a rotatory LED stereoscopic display device, after the electricity, the motor is rotatory, and the power supply supplies power through the carbon brush, and becomes 5V direct current supply lamp pearl board and central control panel through switching power supply, and after the central control panel had electricity, the execution lamp pearl scanning procedure, the lamp pearl will regularly light, the colour of lighting can show different colours through the RGB emitting diode in the PWM control lamp pearl, because the quick rotation of motor, through watching all around, even the top can all be watched true three-dimensional effect, has strengthened visual effect greatly; and the device shows the picture with the form of stand, has characteristics such as waterproof, fall make an uproar, hi-lite, is fit for outdoor use very much, can arrange occasions such as scenic spot, park, trade street, market.
In order to satisfy the display effect, will reduce the windage simultaneously again, the utility model discloses a moving mechanism realizes the lift of lamp pearl board, and 180 can scan and accomplish a screen data, at 180 beginning to promote lamp pearl board, scan next 180 data, after 360 rotatory like this, just can demonstrate the three-dimensional image of a high pixel.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a rotary LED stereoscopic display device according to an embodiment of the present invention;
fig. 2 is a schematic circuit block diagram of a central control board of the rotary LED stereoscopic display device according to an embodiment of the present invention;
fig. 3 is a positional relationship diagram of a lamp bead holder when displayed as a cube image (only 4 positions are shown in the figure).
The reference numbers in the figures denote:
1. the glass cover comprises a glass cover, 101, a top plate, 102, a bottom plate, 2, a motor, 3, a lamp bead fixing frame, 301, an upper beam, 302, a lower beam, 303, a left vertical rod, 304, a right vertical rod, 305, a rotating shaft, 4, a supporting frame, 5, a motor output shaft, 6, a bearing, 7, a Hall sensor, 8, a magnet, 9, a carbon brush, 10, a conducting ring, 11, a lamp bead plate, 12, a Bluetooth sound box, 13, a high-frequency response electromagnet, 14, a telescopic rod, 15, a bearing, 16, a ventilation strip, 17, a main control chip FPGA, 18, a WIFI module, 19, a power module, 20, a Bluetooth audio module, 21, a net mouth chip, 22, a green storage chip, 23, a red storage chip, 24, a blue storage chip, 25, a red LED refreshing circuit, 26, a green LED refreshing circuit, 27, a blue LED refreshing circuit, 28, a lamp bead driving chip and 29.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, the rotary LED stereoscopic display device of the present embodiment includes a glass cover 1, a motor 2, a lamp bead fixing frame 3, a lamp bead plate 11 and a central control board. Preferably, the shape of glass cover 1 is the cylinder, adopt double-deck sound insulation transparent glass, motor 2 fixes the center at glass cover 1 bottom plate 102, lamp pearl mount 3 is located the inside of glass cover 1, pivot 305 of 3 upper ends of lamp pearl mount passes through bearing 15 with glass cover 1's roof 101 and is connected, prevent the off-axis, lower extreme and motor output shaft 5 fixed connection, preferably, lamp pearl mount 3 is the rectangle steel framework, by upper beam 301, underbeam 302, left montant 303 and right montant 304 constitute, set up three rectangular plates at the inside horizontal interval of rectangular framework, lamp pearl board 11 is installed on lamp pearl mount 3, evenly arrange many lamp pearls on the lamp pearl board 11, central control panel installs the bottom at lamp pearl mount 3, central control panel and lamp pearl board 11 control connection.
The device also comprises a support frame 4, the support frame 4 is fixed on the bottom plate 102 of the glass cover 1, the motor output shaft 5 is connected with a rotating shaft 305 fixed at the lower end of the lamp bead fixing frame 3 through a bearing 6, the bearing 6 is used for connecting the motor output shaft 5 with the rotating shaft 305 at the lower end of the lamp bead fixing frame 3, and the bearing 6 is provided with a part for supporting the whole lamp bead fixing frame 3 and installing on the lamp bead fixing frame 3.
In the embodiment, the motor 2 adopts the 220V/380V ac motor 2, and in order to accurately control the rotating speed of the motor 2, a frequency converter is added to control the constant rotating speed of the motor 2.
The Hall sensor 7 is respectively installed at the left side and the right side of the bottom of the lamp bead fixing frame 3, a magnet 8 matched with the Hall sensor 7 for use is fixed above the supporting frame 4, the Hall sensor 7 is connected with the central control panel, the Hall sensor 7 is used for detecting the positions of the lamp bead plate 11 at 0 degree and 180 degrees, and the Hall sensor 7 is used as a base point for calculating the opening and closing of each row of lamp beads and as a starting signal for lifting and lowering the lamp bead plate 11.
The device also comprises a carbon brush 9 and a conducting ring 10 matched with the carbon brush 9 for use, the carbon brush 9 is fixed above the support frame 4, the conducting ring 10 is fixed on a rotating shaft 305 at the lower end of the lamp bead fixing frame 3, the conducting ring 10 is in close contact with the carbon brush 9, the carbon brush 9 is connected with 220V alternating current, the 220V alternating current is conducted through the conducting ring 10, the 220V alternating current is changed into 5V direct current through a switching power supply arranged at the bottom of the lamp bead fixing frame 3, the 5V direct current is used for supplying power to the central control panel and the lamp bead plate 11, enough power can be supplied through the carbon brush 9, high brightness is achieved, the switching power supply is transmitted.
The bluetooth speaker 12 is embedded in the bottom plate 102 of the glass cover 1 for playing recorded audio.
As shown in fig. 2, the central control board includes a main control chip FPGA17, and a WIFI module 18, a storage chip, a power module 19, a bluetooth audio module 20, and a network interface chip 21 that are respectively connected to the main control chip FPGA 17; the WIFI module 18 is used for receiving program information sent by a remote terminal (a mobile phone or a computer), the mobile phone can process the height and the width of a 3D image combination layer, data corresponding to each layer are generated after processing and transmitted to the main control chip FPGA17, and if the program information is required to be changed, the WIFI module is connected with the main control chip FPGA17 to change the content; the bluetooth audio module 20 is used for connecting the bluetooth speaker 12, and the net gape chip 21 is used for cascading next level central control panel, and memory chip includes red memory chip 23, blue memory chip 24, green memory chip 22 and audio memory chip, because the rotatory demonstration is more high than ordinary display screen refresh to the refresh frequency requirement, in order to improve the refresh frequency, this embodiment uses the mode that RGB scanned respectively to go on, and RGB data stores alone. There is red LED refresh circuit 25 main control chip FPGA 17's inside, green LED refresh circuit 26 and blue LED refresh circuit 27, main control chip FPGA17 receives the program information that will show through WIFI module 18, after receiving the program information, main control chip FPGA17 saves red data in red memory chip 23, save green data in green memory chip 22, save blue data in blue memory chip 24, RGB data is separately-stored, store audio information to audio frequency memory chip, program information has been sent, begin work, main control chip FPGA17 exports audio signal to bluetooth audio module 20, bluetooth audio module 20 is connected to bluetooth speaker 12 through the AT instruction that main control chip FPGA17 sent. When the Hall sensor 7 detects 0 degrees, a new round of data refreshing is started, the red LED refreshing circuit 25 refreshes red data only, the blue LED refreshing circuit 27 refreshes blue data only, the green LED refreshing circuit 26 refreshes green data only, after refreshing, the lamp beads are driven by the lamp bead driving chip 28, the color is controlled by PWM, each lamp bead can display a colored light spot, a three-dimensional color image is formed by rotating, and the RGB data are stored separately, so that the data reading time phase is not interfered with each other, and the refreshing frequency is improved. For the expansibility of the equipment, the central control board is also loaded with a network port chip 21, when the number of the lamp beads is excessive, a new central control board can be added, the network port chip 21 is arranged on the new central control board and is used for receiving data, the data is sent during cascading, data information is noted, after the first central control board finishes receiving the data, the data of the second central control board is judged and is directly transmitted to the second central control board through the network port chip 21, and the second central control board respectively stores the data into corresponding storage chips according to RGB (red, green and blue) data.
Because of the reason of rotation, the number of lamp beads needs to be increased for increasing display pixels, if the number of lamp beads is increased, then, the wind resistance is increased, in order to ensure the display effect, and reduce the wind resistance again, we have adopted the mode of moving mechanism moving lamp bead plate 11 to realize, moving mechanism adopts high-frequency response electro-magnet 13, high-frequency response electro-magnet 13 symmetry is installed on upper beam 301 and lower beam 302 of lamp bead mount 3, telescopic link 14 and lamp bead plate 11 upper and lower end fixed connection of high-frequency response electro-magnet 13, all offer the guide slot that is used for lamp bead plate 11 to slide on left montant 303 and the right montant 304 of lamp bead mount 3. If the distance between the lamp beads is changed from 5 x 5mm to 10 x 5mm, the line spacing is increased, the wind resistance is reduced, and in order to meet the requirements of pixels, the high-frequency response electromagnet 13 is adopted to move the lamp bead plate 11 upwards by 5mm, so that the effect of 10 x 5mm is changed into the effect of 5 x 5 mm. It should be noted that, in addition to the up-and-down movement of the lamp bead plate 11, on the same principle, the high-frequency response electromagnets 13 may be symmetrically installed on the left vertical bar 303 and the right vertical bar 304 of the lamp bead fixing frame 3, and used for the left-and-right movement of the lamp bead plate 11, so as to change the row distance. In addition, the influence caused by the action delay of the high-frequency response electromagnet 13 is considered, and for the problem, the action delay time t of the high-frequency response electromagnet 13 is known, and when the action delay time t reaches 180 degrees, the display time of the time t is prolonged, and then the display enters the next 180 degrees, so that the visual influence caused by the action delay caused by the high-frequency response electromagnet 13 is overcome.
If a cylinder is to be shown, then lamp pearl from the bottom up is whole to light, because rotatory relation, a very fast 3D cylinder has just shown, no matter from the preceding left and right sides direction looks, all is a cylinder to because under the effect of 3 rotations of lamp pearl mount and high bright lamp pearls, lamp pearl mount 3 can disappear from people's eyes, thereby only sees a 3D cylinder, and the display effect is better.
If a cube is to be displayed, the Hall sensor 7 is used in the working flow of the lamp beads to provide information of an original point and 180 degrees of rotation, and the opening and closing sequence of each row of the lamp beads can be calculated from the information of the original point and 180 degrees and the rotation time of each circle, so that the cube can be displayed by circulating the operation of each circle of the lamp beads. For example: the lamp pearl of the bottom row, when crossing original point and 180 degrees, as the diagonal of cube, the lamp pearl is just lighted all this moment, because every circle rotational speed is unanimous, if 360 parts are divided into equally to a round, just can calculate the quantity of the lamp pearl of lighting up at every moment, and the lamp pearl is with corresponding reduction and increase at different moments, forms a cube. As shown in fig. 3, when the zero-crossing point is reached, the corresponding lamp beads are lighted, when the lamp beads are operated to the second position, the number of the lamp bead displays is updated, and so on, and after one rotation, the operation is restarted.
The stereoscopic display method realized based on the above rotating LED stereoscopic display device comprises the following steps:
step S11, after the power is turned on, the motor 2 rotates, and the motor 2 rotates at least 24 times per second to form continuous pictures.
And step S12, supplying power through the carbon brush 9, and converting 220V alternating current into 5V direct current through the switching power supply to be supplied to the central control board and the lamp bead board 11.
Step S13, after the central control board is powered on, the main control chip FPGA17 receives program information to be displayed through the WIFI module 18, and the main control chip FPGA17 stores RGB data in corresponding storage chips respectively.
Step S14, when the Hall sensor 7 detects that the lamp bead plate 11 is at 0 degree, the main control chip FPGA17 starts to refresh data in a new round, and the lamp beads are regularly lightened by the lamp bead driving chip 28.
Step S15, when the Hall sensor 7 detects that the lamp bead plate 11 rotates to 180 degrees, the moving mechanism at the upper end drives the lamp bead plate 11 to lift upwards for a certain distance, and the main control chip FPGA17 regularly lights the lamp beads through the lamp bead driving chip 28; 0 ~ 180 scan a screen data earlier, promote the screen 180 in, 180 ~ 360 scan another screen data again, after rotating 360 like this, just constituted the higher image of a pixel, guaranteed display effect to owing to reduced lamp pearl quantity, reduced the windage. For example: the first 180 degrees is equivalent to scanning the dot matrixes of the 1 st, 3 rd, 5 th and 7 th rows, the lamp bead plate 11 is lifted (the lifting distance is 5 mm) at 180 degrees, the second 180 degrees is equivalent to scanning the dot matrixes of the 2 nd, 4 th, 6 th and 8 th rows, and after the rotation of 360 degrees, the dot matrixes of the 1 st, 2 nd, 3 th, 4 th, 5 th, 6 th, 7 th and 8 th rows form a picture, so that the distance between the lamp beads is 10 x 5mm (10 is the row spacing, and 5 is the column spacing), and the same effect as 5 x 5mm can be displayed.
Step S16, after the lamp bead fixing frame 3 rotates 360 degrees, a complete three-dimensional image is formed, and the moving mechanism at the lower end drives the lamp bead plate 11 to return to the original position downward.
The moving mechanism mentioned here may be a push-pull mechanism such as an electric push rod, a hydraulic cylinder, or an air cylinder, instead of the high-frequency response electromagnet 13 in the present embodiment, but the movement is not as fast as the high-frequency response electromagnet 13.
In order to ensure the display effect and reduce the wind resistance, besides the mode of using the above moving mechanism to move the lamp bead plate 11, the wind resistance can also be reduced by another mode, namely: the moving mechanism is removed, the whole lamp bead plate 11 is divided into a left half screen and a right half screen from the middle, the left half screen is provided with lamp beads (line/column … 1, 3 and 5) in odd rows, the right half screen is provided with lamp beads (line/column … 2, 4 and 6) in even rows, and under the condition of improving the rotating speed of the motor 2, a better display effect can be realized, and the wind resistance is reduced. It should be emphasized that the idea of displaying the lamp beads in the odd rows/columns and the even rows/columns to form a whole image belongs to the protection scope of the present invention.
The utility model discloses can follow different angles and watch, can both watch true three-dimensional effect, strengthen the sight of vision greatly, wholly supply people to appreciate with the mode of vwatching the post, be applicable to occasions such as square, scenic spot, indoor hall.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solution of the present invention, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still modify or easily conceive of changes in the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A rotary LED stereoscopic display device, comprising:
a glass cover;
the motor is fixed in the center of the glass cover bottom plate;
the lamp bead fixing frame is positioned in the glass cover, the upper end of the lamp bead fixing frame is rotationally connected with the glass cover, and the lower end of the lamp bead fixing frame is fixedly connected with an output shaft of the motor;
the lamp bead plate is arranged on the lamp bead fixing frame, and a plurality of lamp beads are uniformly distributed on the lamp bead plate;
and the central control panel is arranged at the bottom of the lamp bead fixing frame and is in control connection with the lamp bead plate.
2. The rotary LED stereoscopic display device according to claim 1, further comprising a support frame fixed on a bottom plate of the glass cover, wherein an output shaft of the motor is connected with a rotating shaft fixed at the lower end of the lamp bead fixing frame through a bearing.
3. The rotary LED stereoscopic display device according to claim 2, further comprising Hall sensors mounted on two sides of the bottom of the lamp bead fixing frame and magnets matched with the Hall sensors, wherein the magnets are fixed above the supporting frame, and the Hall sensors are connected with the central control board.
4. The rotary LED stereoscopic display device according to claim 2, further comprising a carbon brush and a conductive ring matched with the carbon brush, wherein the carbon brush is fixed above the support frame, the conductive ring is fixed on a rotating shaft at the lower end of the bead fixing frame, the conductive ring is in contact with the carbon brush, the conductive ring outputs 220 AC, the 220 AC is changed into 5V DC through a switch power supply arranged on the bead fixing frame, and the 5V DC supplies power to the central control board and the bead plate.
5. The rotary LED stereoscopic display device of claim 1, wherein the lamp bead plate comprises a plurality of lamp bead unit plates, the plurality of lamp bead unit plates are cascaded through a flat cable, and each lamp bead unit plate comprises a lamp bead driving chip and a plurality of lamp beads; a plurality of ventilation strips are arranged on the lamp bead plate at intervals in the transverse direction.
6. The rotary LED stereoscopic display apparatus according to claim 1, wherein a bluetooth speaker is embedded in a bottom plate of the glass cover.
7. The rotary LED stereoscopic display device of claim 6, wherein the central control board comprises a main control chip FPGA and a WIFI module, a storage chip, a power supply module, a Bluetooth audio module and a network interface chip which are respectively connected with the main control chip FPGA; the WIFI module is used for receiving program information sent by the remote terminal, the storage chip is used for storing RGB data in the corresponding storage chip respectively, the Bluetooth audio module is used for connecting a Bluetooth sound box, and the network port chip is used for cascading a next-level central control panel.
8. The rotary LED stereoscopic display device according to claim 1, further comprising a moving mechanism, wherein the moving mechanism adopts a high-frequency response electromagnet, the high-frequency response electromagnet is symmetrically installed on an upper beam and a lower beam of the lamp bead fixing frame, a telescopic rod of the high-frequency response electromagnet is fixedly connected with an upper end and a lower end of the lamp bead plate, and a left vertical rod and a right vertical rod of the lamp bead fixing frame are respectively provided with a guide groove for the lamp bead plate to slide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020581101.3U CN211742538U (en) | 2020-04-18 | 2020-04-18 | Rotary LED stereo display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020581101.3U CN211742538U (en) | 2020-04-18 | 2020-04-18 | Rotary LED stereo display device |
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| CN211742538U true CN211742538U (en) | 2020-10-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111462647A (en) * | 2020-04-18 | 2020-07-28 | 宋小辉 | Rotating LED stereoscopic display device and method |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111462647A (en) * | 2020-04-18 | 2020-07-28 | 宋小辉 | Rotating LED stereoscopic display device and method |
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