Display device

Abstract

The present application provides a display device, comprising a base, a plurality of light bars, a driving mechanism and a light bar driving board. A rotating part comprises a plurality of rotating branch parts. One end of each of the light bars is fixedly connected to a corresponding one of the plurality of rotating branch parts, respectively, and the other end of the light bar is fixed by means of a connector. The driving mechanism is disposed in a fixed part of the base and drives the rotating part to drive the light bars to rotate taking the line connecting the center of the connector and the center of the rotating part as a rotation axis. The light bar driving board is disposed in the rotating part of the base and connected to the light bars.

Description

A display device Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display device. Background Art

[0002] Persistence of vision (POV), also known as the "afterglow effect," occurs when the human eye observes something. After the light signal reaches the brain, it takes a brief period of time for the visual image to disappear. This phenomenon is called "persistence of vision." POV scanning display devices utilize this effect to display images through horizontally moving or rotating LED light strips. This technology, which utilizes both the persistence of vision effect and rotating LED light strips to display images, is also known as rotational display technology.

[0003] Currently, the main type of display on the market is a flat rotating display, which generally uses a single or multiple light bars to rotate around the center of the axis. When the refresh rate of the same position on the screen exceeds 24 frames, due to the visual effect of the human eye, the subjective perception is that a complete and continuous image is obtained.

[0004] Such a display assembly uses a straight light bar to rotate on a plane, and the resulting flat rotating display screen has a poor three-dimensional effect. SUMMARY OF THE INVENTION

[0005] The purpose of this application is to provide a display device, aiming to improve the 3D stereoscopic effect of the display device.

[0006] The present application provides a display device, comprising:

[0007] A base comprising a fixed portion and a rotating portion, wherein the rotating portion comprises a plurality of rotating branches;

[0008] A plurality of light bars, each of which is arc-shaped, one end of each of the light bars being fixedly connected to each of the plurality of rotating branches, and the other ends of each of the light bars being fixed via a connector;

[0009] a driving mechanism, disposed in the fixing portion, and driving the rotating portion to drive the light bar to rotate about a line connecting the center of the connector and the center of the rotating portion as an axis of rotation;

[0010] The light bar driving plate is arranged in the rotating part and connected to the light bar, and is used to drive the light bar to display images when rotating.

[0011] In some embodiments, the light bar includes an inner side close to the rotation axis and an outer side away from the rotation axis, and the light bar includes lamp beads arranged on the inner side or the outer side.

[0012] In some embodiments, the light bar driving board is disposed on a side of the light bar away from the lamp beads, and is connected to the light bar via a pin header.

[0013] In some embodiments, the display device further comprises:

[0014] A top circuit board is connected to a side of the light bar away from the lamp beads, and the light bar driving board is connected to a side of the top circuit board away from the light bar;

[0015] The bottom circuit board is arranged in the fixing portion, and the bottom circuit board is connected to a side of the light bar driving board away from the top circuit board.

[0016] In some embodiments, the connector includes a plurality of slots corresponding one-to-one to the plurality of light strips, and the light strips are engaged and connected with the slots.

[0017] In some embodiments, the plurality of rotating branches are evenly spaced apart in a top-view plane direction, and the light bars are evenly spaced apart in the top-view plane direction.

[0018] In some embodiments, the display device further includes a power supply mechanism, and the power supply mechanism includes:

[0019] a first coil, disposed in the fixing portion and connected to a first power control module in the bottom circuit board;

[0020] a second coil disposed in the rotating portion, wherein the diameter of the second coil is smaller than the diameter of the first coil, and the center of the second coil coincides with the center of the first coil, and the second coil is connected to the second power control module in the light bar driving board;

[0021] The first coil supplies power to the second coil via wireless power supply.

[0022] In some embodiments, the bottom circuit board further includes a signal receiving and processing module, a motor driving module, and a wireless data transmitting module;

[0023] The top circuit board includes a lamp bead driving module, a wireless data receiving module, a memory card reading module and a picture synchronization module respectively connected to the lamp bead driving module;

[0024] The wireless data receiving module receives the data signal from the wireless data sending module through the light bar driving board; or receives the data signal processed by software through the light bar driving board.

[0025] In some embodiments, the memory card reading module is used to read the data signal processed by software and transmit it to the lamp bead driving module.

[0026] In some embodiments, the display device further includes a screen synchronization mechanism, and the screen synchronization mechanism includes:

[0027] An infrared emission module is provided on the bottom circuit board;

[0028] The infrared receiving module is arranged on the light bar driving board and corresponds to the infrared transmitting module. An transmitting through hole is formed between the infrared receiving module and the infrared transmitting module. Beneficial effects

[0029] The present application provides a display device, comprising a base, a plurality of light bars, a driving mechanism and a light bar driving plate. The base comprises a fixed portion and a rotating portion, the rotating portion comprises a plurality of rotating branches, the light bar is arc-shaped, one end of the plurality of light bars is respectively fixedly connected to the plurality of rotating branches, and the other ends of the plurality of light bars are fixed by connectors. The driving mechanism is arranged in the fixed portion to drive the rotating portion to drive the light bar, and rotates with the line connecting the center of the connector and the center of the rotating portion as the rotation axis. The light bar driving plate is arranged in the rotating portion and connected to the light bar, and is used to drive the light bar to display an image when rotating. Therefore, the present application provides a three-dimensional rotating display device, which can improve the 3D stereoscopic display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings will make the technical solutions and other beneficial effects of the present application apparent.

[0031] FIG1 is a schematic structural diagram of a base provided in some embodiments of the present application;

[0032] FIG2 is a schematic diagram of the structure of a light bar provided in some embodiments of the present application;

[0033] FIG3 is a schematic structural diagram of a connector provided in some embodiments of the present application;

[0034] FIG4 is a schematic diagram of a light bar display provided by some embodiments of the present application;

[0035] FIG5 is a schematic diagram of a light bar display provided by other embodiments of the present application;

[0036] FIG6 is a schematic structural diagram of a light bar and a light bar driver board provided in some embodiments of the present application;

[0037] FIG7 is a schematic structural diagram of a light bar and a top circuit board provided in some embodiments of the present application;

[0038] FIG8 is a schematic structural diagram of a power supply mechanism provided in some embodiments of the present application. Modes for Carrying Out the Invention

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0040] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the described features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0041] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0042] The disclosure below provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.

[0043] Please refer to Figures 1, 2 and 3. Figure 1 is a structural schematic diagram of the base provided in some embodiments of the present application, Figure 2 is a structural schematic diagram of the light bar provided in some embodiments of the present application, and Figure 3 is a structural schematic diagram of the connector provided in some embodiments of the present application.

[0044] The display device can be applied to a multimedia rotating 3D advertising light that integrates 3D image (picture, video) presentation, sound playback, WIFI amplifier, background image (atmosphere), multi-directional rotation device, centralized power supply / signal transmission, and background management system.

[0045] The display device includes a base 10, multiple light bars 20, a connector 30, a drive mechanism (not shown), and a light bar drive board (not shown). The base 10 includes a fixed portion 11 and a rotating portion 12. The rotating portion 12 includes multiple rotating branches 121. The light bars 20 are arc-shaped, for example, they can be bent into a semicircle. One end of each of the multiple light bars 20 is fixedly connected to the multiple rotating branches 121, and the other ends of the multiple light bars 20 are fixed via the connector 30. The drive mechanism is disposed in the fixed portion 11 to drive the rotating portion 12, driving the light bars 20 to rotate about the line connecting the center of the connector 30 and the center of the rotating portion 12 as the rotation axis A-A1. That is, in Figure 2, the top of the rotation axis A-A1 passes through the center of the connector 30, and the bottom of the rotation axis A-A1 passes through the center of the rotating portion 12. The light bar drive board is disposed in the rotating portion 12 and connected to the light bars 20, driving the light bars 20 to display images during rotation.

[0046] As shown in Figure 1, the rotating portion 12 is connected to the top of the fixed portion 11. The driving mechanism in the fixed portion 11 may include a motor, which is connected to the rotating portion 12 to drive the rotating portion 12 to rotate. The motor includes a stator and a rotor. The stator is mounted on the fixed portion 11 of the base 10, and the rotor is fixed to the bottom rotating portion 12 by screws. When the motor rotates, it drives the entire upper half of the display device to rotate. The motor achieves self-calibration through an encoder and Hall feedback to maintain a stable speed, ensuring that the display device rotates one full revolution just enough for the light bar 20 to refresh a frame of image information.

[0047] The rotating portion 12 includes a plurality of rotating branches 121, and the plurality of rotating branches 121 are evenly spaced in the top view direction, that is, the rotation angles between any two adjacent rotating branches 121 or light bars 20 are equal. One rotating branch 121 can be connected to one light bar 20. For example, FIG1 illustrates a method of fixing the light bar 20 to the rotating branch 121. The bottom of the light bar 20 can be fixedly connected to the rotating branch 121 by a slot or screw, and the bottom of the light bar 20 is inserted into the rotating branch 121. The number of light bars 20 is equal to the number of rotating branches 121. This application does not limit the number of light bars 20 and can be set according to actual needs.

[0048] For example, the rotating portion 12 includes four rotating branches 121. The four rotating branches 121 are spaced evenly apart, that is, the rotation angle between two adjacent rotating branches 121 is 90 degrees. FIG1 only shows two rotating branches 121 disposed opposite to each other.

[0049] As shown in Figures 1 and 3, one end of the plurality of light bars 20 is fixedly connected to the rotating branch 121, and the other ends of the plurality of light bars 20 are fixedly connected via a connector 30 provided at the top. The connector 30 may include a plurality of slots 31 corresponding to the plurality of light bars 20, and the light bars 20 are engaged with the slots 31.

[0050] For example, the connector 30 may have four slots 31, with the angle between two adjacent slots 31 being 90 degrees. Four light strips 20 are each inserted into a slot 31. FIG3 shows a top view, with the cross-section of the slot 31 in the dotted box shown in the lower right corner of FIG3 . The cross-section of the slot 31 is a rectangle surrounding the light strip 20. The bottom 311 of the slot 31 covers one surface of the light strip 20, and the top of the slot 31 has an opening to expose a portion of the other opposite surface of the light strip 20. Lamp beads are provided on the surface of the light strip 20 exposed by the slot 31 to ensure the display function of the light strip 20 at the top.

[0051] The display device can include two display modes, pseudo-plane 2D display and spherical 3D display. The basic display principle is that every time the light bar 20 rotates to an angle, the LED refreshes the display information. When each light bar 20 rotates 90°, the four light bars 20 complete the display of a complete spherical image. Combining these one-dimensional display information in a frame in time will result in a 2D display screen, which is usually used as the information input of the display device. As far as the display device is concerned, the 2D screen will first be split into 4 parts, each part corresponding to the display of a light bar 20, and each line of the image will be displayed in turn according to the motor speed, so that a frame is refreshed after rotating 90°. If the image at each angle is refreshed more than 24 times per second, based on the human eye's temporary visual effect, the human eye can observe a complete and continuous image.

[0052] The application scenarios of pseudo-flat 2D display include: 1. providing support for video sources that lack 3D spherical display capabilities, enabling them to display 2D images normally; and 2. displaying video sources with pseudo-3D effects, making them closer to true 3D effects. The specific image processing method is to input the original 2D image, and the bottom circuit board performs the following processing on the image to produce a 2D effect on the spherical surface.

[0053] Assume that the angle between a certain LED on the LED light bar 20 and the line connecting the center of the sphere and the horizontal plane facing the human eye is α, and the angle between the LED and the rotation axis A-A1 is β. If the resolution of the displayed pseudo-2D image is X1×Y1, then the 2D image coordinates corresponding to the grayscale size displayed by the LED light are:

[0054] x = L × cosα × sinβ (-X1 / 2 <x<X1 / 2)

[0055] y = L × cosβ (-Y1 / 2 <y<Y1 / 2)

[0056] Where L is the radius of the sphere, x is the horizontal coordinate of the 2D image, y is the vertical coordinate of the 2D image, and the origin of the coordinate axis coincides with the center of the sphere.

[0057] Spherical 3D display is a direct stereoscopic display. To convert a 2D signal into a spherical 3D image, each of the four LED light bars 20 rotates 90° to display a complete spherical image. Assuming the number of refreshes per 90° rotation is N1, the total refresh rate for the four light bars 20 is 4 × N1. Assuming the number of LEDs per light bar 20 is N2, the resolution of the processed 2D image is N2 × (4 × N1). The 3D spherical source is converted to 2D as follows: the Xth light on the light bar 20 represents the xth row of the 2D image, and the Yth angle of rotation, 2π / (4 × 4 × N1), represents the yth column of the image. This process requires converting the original spherical source into a 2D source input before normal display playback.

[0058] Please refer to Figures 4 and 5. Figure 4 is a schematic diagram of the light bar display provided by some embodiments of the present application, and Figure 5 is a schematic diagram of the light bar display provided by other embodiments of the present application.

[0059] The light bar 20 includes an inner side 21 near the rotation axis A-A1 and an outer side 22 away from the rotation axis A-A1. The light bar 20 includes lamp beads arranged on the inner side 21 or the outer side 22. The lamp beads can be LED lamps. When the light bar 20 is bent into a semicircle, the rotating display image is spherical.

[0060] In the embodiment of FIG. 4 , the lamp beads are disposed on the outer side 22 of the light bar 20 . After the light bar 20 rotates, the image is located on the outer side 22 of the spherical display. The human eye can observe the display information when the light bar 20 is close to the side where the person is standing.

[0061] In the embodiment of FIG. 5 , the lamp beads are disposed on the inner side 21 of the light bar 20 , and the human eye can observe the display information when the light bar 20 is away from the side where the person is standing.

[0062] Please refer to FIG6 , which is a schematic structural diagram of a light bar and a light bar driving board provided in some embodiments of the present application.

[0063] In some embodiments, the lamp beads 23 are disposed on one side of the light bar 20, and the light bar driver board 40 is disposed on the side of the light bar 20 facing away from the lamp beads 23. The light bar driver board 40 may be provided with a driving circuit 41 and a pin header 42. The drive signal and power are provided by connecting the pin header 42 to the light bar 20. This structure achieves an integrated design of the light bar 20 and the light bar driver board 40, reducing the need for an additional housing for the light bar 20.

[0064] The display device may further include a bottom circuit board (not shown) arranged in the fixing portion 11, wherein the bottom circuit board is connected to the side of the light bar driving board 40 away from the light bar 20. The bottom circuit board may adopt a field programmable gate array (FPGA) as the main control IC, and its functions include HDMI / DP signal reception and processing, motor drive, wireless power transmission, and wireless data transmission. The light bar driving board 40 may also adopt FPGA as the main control IC, and its functions include LED light driving, wireless data reception, storage (SD) card data reading, and screen synchronization. The bottom circuit board and the light bar driving board 40 can be split into multiple printed circuit boards (PCBs) according to their own needs to realize their functions.

[0065] The display device may further include a plurality of interfaces arranged on the fixed portion 11 of the base 10. The interfaces may transmit HDMI or DP data signals to the bottom circuit board. The bottom circuit board may choose whether to further process the data, and then transmit the data signals wirelessly to the main control IC in the light bar driving board 40. The main control IC in the light bar driving board 40 then transmits the data signals to the light bar 20 to drive the lamp beads 23 (LEDs) for display.

[0066] Please refer to Figure 7, which is a schematic diagram of the structure of the light bar and the top circuit board provided in some embodiments of the present application. For ease of understanding and brief description, the same reference numerals are used for the same structures in this embodiment as in the above embodiments.

[0067] The display device also includes a top circuit board 50 connected to the side of the light bar 20 facing away from the lamp beads 23. A light bar driver board (see FIG6 ) is connected to the side of the top circuit board 50 facing away from the light bar 20. The top circuit board 50 and the light bar 20 are connected via a chip-on-film (COF) 51 . The COF 51 can be positioned at the edge of the light bar 20 and connected to the edge of the top circuit board 50. The top circuit board 50 can be connected to the light bar driver board (not shown in FIG7 ) via a flexible flat cable 52 (FFC).

[0068] The display device may further include a bottom circuit board (not shown) disposed in the fixing portion 11, the bottom circuit board being connected to a side of the light bar driving board away from the top circuit board 50. Therefore, the display device is provided with the bottom circuit board, the light bar driving board, the top circuit board 50, and the light bar 20 in order from bottom to top.

[0069] In some embodiments, the data signal processed by the front end can be directly sent to the WIFI receiving module on the light bar driver board via WIFI, and then transmitted to the top circuit board 50 for output to the lamp beads 23 (LED) driver. The data signal processed by the front end can be processed by software, that is, this signal transmission solution does not need to use the bottom circuit board.

[0070] In some embodiments, the top circuit board 50 can directly read the processed data information from the storage (SD) card on the light bar driver board and then transmit it to the lamp beads 23 (LED driver). The data information in the storage (SD) card can be processed by software, and this signal transmission scheme can also not pass through the bottom circuit board.

[0071] Corresponding to the signal transmission scheme, the bottom circuit board includes a signal receiving and processing module, a motor driving module, and a wireless data transmission module. The top circuit board 50 includes a lamp bead driving module, a wireless data receiving module connected to the lamp bead driving module, a memory card reading module, and a picture synchronization module.

[0072] In some embodiments, the wireless data receiving module is used to receive data signals from the wireless data transmitting module. Specifically, the data signals sent by the wireless data transmitting module in the bottom circuit board are sent to the wireless data receiving module in the top circuit board 50 through the light bar driver board, and then transmitted to the LED for display through the lamp bead driver module.

[0073] In some embodiments, the wireless data receiving module is used to receive data signals processed by software. Specifically, the data signals processed by software can be directly sent to the WiFi module of the light bar driver board via WiFi, and then transmitted to the wireless data receiving module in the top circuit board 50, and output to the LEDs of the light bar 20 for display via the lamp bead driver module.

[0074] In some embodiments, the memory card reader module is used to read the data signal processed by the software and transmit it to the lamp bead driver module. Specifically, the memory card reader module in the top circuit board 50 directly reads the data signal, transmits it to the lamp bead driver module, and then outputs it to the LEDs of the light bar 20 for display.

[0075] Please refer to FIG8 , which is a schematic structural diagram of a power supply mechanism provided in some embodiments of the present application.

[0076] The bottom circuit board includes a first power control module, and the light bar driver board includes a second power control module. The display device may also include a power supply structure 60, which includes a first coil 61 and a second coil 62. Referring to Figure 1 , the first coil 61 is disposed in the fixing portion 11 and is connected to the first power control module in the bottom circuit board.

[0077] The second coil 62 is disposed in the rotating portion 12 and, when viewed from above, is nested within the first coil 61. Specifically, the diameter of the second coil 62 is smaller than that of the first coil 61, and the centers of the first and second coils 61 and 62 coincide, with the second coil 62 being located above the first coil 61.

[0078] The second coil 62 is connected to the second power control module in the light bar driver board, and the first coil 61 supplies power to the second coil 62 wirelessly, eliminating the need for tangled wires. The fixed portion 11 of the base 10 includes a 12V power input interface, which is used to power the internal motor and bottom circuit board via a wired connection. Therefore, power is supplied to the LEDs in the light bar 20 via the power input interface, the first power module, the first coil 61, the second coil 62, and the second power module.

[0079] In some embodiments, the display device may further include a screen synchronization mechanism (not shown). The screen synchronization mechanism includes an infrared emitting module and an infrared receiving module. The infrared emitting module is disposed on the bottom circuit board, and the infrared receiving module is disposed at the bottom of the light bar driver board and corresponds to the infrared emitting module. A transmitting through hole is formed between the infrared receiving module and the infrared emitting module. The infrared emitting module may include one or more infrared LEDs, and the transmitting through holes are formed in the rotating portion 12 and the fixed portion 11.

[0080] Explaining the working mechanism using one transmitter and one receiver, the infrared LED's signal can only be detected by the LED receiver above it when the rotating portion 12 rotates to a certain angle, passing through the transmitting holes in the two mechanisms (rotating portion 12 and fixed portion 11). Receiving the signal only once per rotation allows the next frame to be transmitted a fixed period of time after receiving the signal, without guaranteeing that each frame will be displayed from a fixed position. By adjusting the delay between receiving and transmitting the signal, the specific position of the image display can be adjusted.

[0081] The display device provided in the present application includes a base 10, a plurality of light bars 20, a driving mechanism and a light bar driving plate. The base 10 includes a fixed portion 11 and a rotating portion 12, the rotating portion 12 includes a plurality of rotating branches 121, the light bar 20 is arc-shaped, one end of the plurality of light bars 20 is respectively fixedly connected to the plurality of rotating branches 121, and the other end of the plurality of light bars 20 is fixed by a connector 30. The driving mechanism is arranged in the fixed portion 11 to drive the rotating portion 12 to drive the light bar 20, and rotates with the line connecting the center of the connector 30 and the center of the rotating portion 12 as the rotation axis A-A1. The light bar driving plate is arranged in the rotating portion 12 and connected to the light bar 20, and is used to drive the light bar 20 to display images when rotating. Therefore, the present application provides a three-dimensional rotating display device, which can improve the 3D stereoscopic display effect.

[0082] The description of the above embodiments is only used to help understand the technical solutions and core ideas of this application; ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A display device, wherein: The display device comprises: A base, comprising a fixed portion and a rotating portion, wherein the rotating portion comprises a plurality of rotating branches; A plurality of light bars, each of which is in an arc shape, one end of each of which is fixedly connected to each of the plurality of rotating branches, and the other end of each of which is fixed by a connector; A driving mechanism is disposed in the fixing portion and drives the rotating portion to drive the light bar to rotate with the line connecting the center of the connector and the center of the rotating portion as the rotation axis; The light bar driving plate is arranged in the rotating part and connected with the light bar, and is used for driving the light bar to display images when rotating.

2. The display device according to claim 1, wherein: The light bar comprises an inner side close to the rotation axis and an outer side far away from the rotation axis, and the light bar comprises lamp beads arranged on the inner side or the outer side.

3. The display device according to claim 2, wherein: The light bar driving board is arranged on a side of the light bar away from the lamp beads, and is connected to the light bar via a pin header.

4. The display device according to claim 2, wherein: The display device further includes: A top circuit board is connected to a side of the light bar away from the lamp beads, and the light bar driving board is connected to a side of the top circuit board away from the light bar; The bottom circuit board is arranged in the fixing portion, and the bottom circuit board is connected to a side of the light bar driving board away from the top circuit board.

5. The display device according to claim 1, wherein: The connector includes a plurality of card slots corresponding to the plurality of light bars one by one, and the light bars are engaged and connected with the card slots.

6. The display device according to claim 1, wherein: The plurality of rotating branches are evenly spaced apart in the direction of the top-view plane, and the light bars are evenly spaced apart in the direction of the top-view plane.

7. The display device according to claim 4, wherein: The display device further includes a power supply mechanism, and the power supply mechanism includes: A first coil, disposed in the fixing portion and connected to a first power control module in the bottom circuit board; A second coil is disposed in the rotating part, the diameter of the second coil is smaller than the diameter of the first coil, and the center of the second coil coincides with the center of the first coil, and the second coil is connected to a second power supply control module in the light bar driving board; Wherein, the first coil supplies power to the second coil via wireless power supply.

8. The display device according to claim 4, wherein: The bottom circuit board also includes a signal receiving and processing module, a motor driving module and a wireless data sending module; The top circuit board includes a lamp bead driving module, a wireless data receiving module, a memory card reading module and a picture synchronization module respectively connected to the lamp bead driving module; The wireless data receiving module receives the data signal from the wireless data sending module through the light bar driving board; or receives the data signal processed by software through the light bar driving board.

9. The display device according to claim 8, wherein: The memory card reading module is used to read the data signal processed by software and transmit it to the lamp bead driving module.

10. The display device according to claim 4, wherein: The display device further includes a picture synchronization mechanism, and the picture synchronization mechanism includes: An infrared emission module is arranged on the bottom circuit board; The infrared receiving module is arranged on the light bar driving board and corresponds to the infrared transmitting module. An transmitting through hole is formed between the infrared receiving module and the infrared transmitting module.

11. The display device according to claim 1, wherein: The driving mechanism comprises a motor, and the motor comprises a stator and a rotor. The stator is mounted on the fixing part, and the rotor is fixed to the rotating part by screws.

12. The display device according to claim 6, wherein: The number of the rotating branches and the number of the light bars are both four, and the rotation angle between two adjacent rotating branches or light bars is 90 degrees.

13. The display device according to claim 4, wherein: The display device further includes a plurality of interfaces disposed on the fixing portion, and the interfaces transmit data signals to the bottom circuit board.

14. The display device according to claim 4, wherein: The top circuit board is connected to the light bar via a chip-on-chip film.

15. The display device according to claim 4, wherein: The top circuit board is connected to the light bar driving board through a flexible flat cable.

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