TWI431575B - Rotated led display apparatus and control method - Google Patents

Description

Rotary LED display device and control method

The invention belongs to the technology of LED picture display, and mainly controls the brightness change of the RGB three primary color LEDs when the LEDs of the three primary colors of RGB are rotated, thereby achieving a specific display effect. Especially for the rotating chassis controlled by the DC motor, a symmetrical RGB LED light row is arranged on the chassis, and the LED light row forms a rotating surface when the chassis rotates, and the LED light row is controlled to change at different positions/times. The desired light shows the effect.

The display technology of LED is widely used in advertising billboards. The simple ones arrange monochromatic or bi-color LEDs into a dot matrix type, and display the specific characters or graphics by controlling the LEDs of the respective positions. For example, the design of a small green man widely located at the intersection of traffic has also attracted foreign media to come to Taiwan for interviews, which has enhanced Taiwan's popularity. With the rise of the bicycle trend, the little green man has more evolutionary versions. On the streets of Taipei, the little green man has also riding a bicycle and boarding the news page. The complex LED advertising billboards form a dot matrix layout with full-color RGB LEDs. By controlling the brightness of the RGB LEDs, a more dazzling and colorful display effect is achieved, which often attracts the attention of passing pedestrians. This kind of existing dot matrix LED control method, the number of LEDs used increases with the area of the LED board surface, although it has its own special occasions, but the power consumption and the cost of LED panel construction still remain. High, and it is not easy to achieve detailed text or graphic display effects.

The invention proposes to use the red, green and blue LED light rows as the display elements respectively, and control the change of the LEDs at different positions or time points when the three-color lamp row rotates at a high speed on a cylindrical surface or a conical surface. The display of a specific text or pattern is achieved due to the effect of persistence of vision. With this invention, only a small number of LEDs can be used to achieve the display of a specific text or pattern.

In order to display a large area of text or pattern with a small number of LEDs, the amount of LEDs used can be saved, and the power consumption of the LED display can be reduced. The rotary LED display device of the present invention mainly comprises a rotating circular chassis driven by a DC motor, and the upper layer of the chassis is provided with an electric control circuit board, an LED driving interface circuit and a power supply circuit. The circular chassis edge equidistant group is provided with three red, green and blue (RGB) LED light rows, and the three LED light rows are arranged in a column or a cone shape, and are fixedly arranged on the top edge. The LED lamp row is provided with a plurality of high-brightness LEDs according to the required length group, and each of the eight groups is modulated by the constant current IC to illuminate the LED. The bottom of the rotating circular chassis is composed of a plurality of conductive copper rings insulated with each other, an insulating seat and a metal flat plate. The base and the circular chassis are connected by ball bearings, and the brush is in contact with the copper ring by rotation. , transfer the required power to the upper board. When the motor drives the chassis to rotate, the lamp row rotates in a pyramid or a cylinder, controls the brightness ratio of the RGB three-color lamp row, and changes the brightness of each LED lamp. Due to the persistence of vision, a rich and varied display can be achieved. effect.

In order to accurately control the display position of the text or the pattern when the display is rotated, the present invention detects the position of the rotating shaft, and according to the detection of the specific position, initially adjusts the LED of each turn to change the frequency of the modulation, thereby Enable text or drawings to be displayed in a fixed position.

In order to further understand the technical features and effects of the present invention, the present invention will be further described below in conjunction with the embodiments.

As shown in FIG. 1 , a perspective view of a rotary display of the present invention mainly includes a base 1 , a rotating circular chassis 2 , a lamp rack 3 , a lamp row 4 , an electric control board 5 , a DC motor 6 , and a power supply 7 . And other components. Referring to FIG. 2, the base 1 is used to carry the body of the rotating display. The bottom of the base is a metal flat plate 11. A plurality of insulating anti-slip sleeves 12 are disposed at appropriate positions on the lower edge of the metal flat plate, and are placed on the metal flat plate 11. The plane group is provided with a circular plastic insulating seat 13. The insulating seat 13 (see FIG. 3) is provided with a plurality of circular grooves 131 in a concentric manner, and a circular copper ring 14 of the same size can be assembled in the circular groove 131, and a power connection is left at an appropriate position. The channel 141, 俾 is connected to the power supply provided by the power supply 7 to the copper ring 14. The anti-slip sleeve 12 and the metal flat disc 11 are locked by a screwing member 15. The number of the copper ring 14 and the power connection channel 141 is the same, depending on the number of power groups that must be transmitted to the electronic control board 5. The power supply used in the electronic control board of the present invention has a 5V/1A power supply used by the CPU, a 4~6V/5A power supply used for the LED light row, and a 24V power supply required for the DC motor. The power supply obtained from the power supply has 12V/10A and 24V. /3A two groups, so the copper ring 14 and the connection channel 141 required for grounding are all four.

As shown in FIG. 2 and FIG. 3, the circular copper ring 14 is embedded in the corresponding groove 131 of the insulating seat 13, and the height of the inner ring copper ring is just aligned with the circular arm surface 132 inside the insulating seat, and the circular wall surface 132 The inner accommodating space 16 is formed by a circular ball bearing set 20 (see FIG. 10), and a through hole 161 is formed in the middle of the accommodating space 16. Referring to FIG. 4, a plurality of screw holes 133 are formed in the bottom surface of the insulating seat 13 for the screw holes 111 and 1711 corresponding to the metal flat plate 11 and the metal block 17 (refer to FIG. 7), and the metal flat plate 11 and the metal block are screwed. 17 combined into one, as shown in Figure 5. Referring to FIG. 6, a circular through hole 112 is formed in the center of the metal flat plate 11, and the circular through hole 112 is provided with a metal block 17 for the metal flat plate 11 to be arranged upward.

Referring to FIG. 7, the metal block 17 is a stepped three-section annular protrusion, and the bottom layer 171 is a disk having the largest area, corresponding to the relative position of the screw hole 111 of the metal flat plate 11 and the screw hole 133 of the insulating seat 13. A screw hole 1711 is provided. The second ring projection 172, which is upward from the bottom layer, is approximately the same size as the center through hole 161 of the insulating seat 13. The upward direction can be inserted into the center through hole 161 of the accommodating space 16 of the insulating seat 13. The uppermost layer of the metal block is a hollow protrusion 173, and the through hole 1731 at the center of the protrusion 173 penetrates the entire metal block 17, and the through hole 1731 can be inserted into a reducer shaft 611 (refer to FIG. 8). A screw hole 1732 is bored in the side of the protrusion 173, so that the screw can be inserted into the through hole 1731. The insulating seat is provided with a circular passage 134 corresponding to the screw hole 1732, and the jig is inserted into the screw.

Figure 9 shows the rotating chassis 2 of the display. The rotating chassis 2 is provided with a plurality of through holes 22 to reduce the weight of the chassis. The through hole 23 at the center is provided for the gear unit 61 of the output shaft of the DC motor 6 to be driven. The output shaft 611 is embedded in the through hole 211 at the center of the ball bearing set 20, and is assembled and inserted into the center through hole 1731 which is urged to the metal block 17 of the base 1. The output shaft surface of the gear machine is provided with a plurality of screw holes 612, which are screwed with the opposite screw holes 2013 of the bearing surface of the motor fixing piece 201 of the ball bearing group 20. The three-dimensional illustration of the ball bearing set is shown in Figure 10 (a), and Figure 10 (b) is the exploded view of the main element. The inner ring of the ball bearing 202 is provided with a bearing fixing ring 203. The upper ring of the fixing ring is provided with a plurality of screw holes 2031. The fixing ring 203 is provided with a bearing fixing piece 204, and the lower surface is provided with a motor fixing piece 201. A plurality of screw holes 24 are formed in the ring near the through hole 23 near the center of the rotating chassis 2 so as to be screwed together with the screw holes 214 designed to be opposite to the bearing surface 2051 of the ball bearing set pad 205. In order to maintain a proper space for the ball bearing 202 and the rotating chassis 2, a circular pad 205 may be disposed between the ball bearing 202 and the rotating chassis 2, and the pad 205 is also provided with a relative screw hole and a ball bearing set 20 Set up.

Rotating the chassis 2 and symmetrically screwing the brush holder 25 between the through holes 22, the radial position of the through hole 251 of the brush holder 25 corresponds to the copper ring 14 of the base, and can be self-contained when the rotating chassis rotates The ring 14 conducts the corresponding power source to the electrical control board 5.

The edge of the rotating chassis 2 is symmetrically provided with a plurality of lamp rack fixing ears 26, the fixing ears 26 are in front of the U-shaped shape, the two sides of the crucible are provided with screw holes 261, and the screws are provided with the bottom of the locking lamp rack 3 edge.

The lamp bay 3 can be in any configuration according to the requirements of the display, as shown in FIG. The lamp bay 3 designed in Fig. 11 is elongated and processed into a U-shaped side to increase its strength. The screw holes 31 are arranged on the two sides of the bottom end of the lamp rack. When combined with the fixing lugs 26 provided on the rotating chassis, the screws are screwed through the screw holes 31 and 261, and the top end is provided with a screw hole 311. For fixed use. In conjunction with the design of the lamp row 4, a plurality of screw holes 32 are additionally provided at appropriate positions of the lamp row frame for fixing the combination of the lamp rows. The lamp rack can be additionally provided with appropriate through holes to reduce the weight of the lamp rack. After the lamp bays 3 are respectively combined with the fixed ears 26 of the rotating chassis, the angles thereof can be adjusted, so that the lamp racks 3 can be rotated in a tapered or cylindrical shape when rotated. When assembled, a fixing frame 33 is disposed at the top of the lamp rack (see FIG. 12). The center of the fixing frame 33 is provided with a screw hole 331 for locking three pieces 332 extending from a common point. The end of the sheet body 332 is provided. The screw hole 3321 and the screw hole 311 of the top edge of the lamp rack are screwed and fixed. The length of the sheet 332 can be elastically adjusted in length depending on the desired configuration.

As shown in FIG. 13, the lamp row 4 is a circuit board 41, 42 which is wired with the design of the circuit. The circuit board 41 is wired with a constant current IC and a required resistor and capacitor element, and the circuit board 42 is provided with an LED element. The 41 and 42 circuit boards are connected by connection terminals and are assembled by screwing members 43. The invention utilizes the RGB three-color design of the division, and has three rows of red, blue and green lights respectively. After the three-color lamp row is combined with the fixed ear 26 of the rotating chassis, the angle can be adjusted to make the lamp row rotate in a tapered or cylindrical shape.

The electric control board 5 is formed in a circular ring shape, as shown in FIG. 14, which is provided with circuits such as a micro control chip, a motor drive, and a program burning. In conjunction with the installation of the DC motor 6, the center of the electronic control board is hollowed out with a through hole 51 through which the motor can be passed. The electric control board 5 is provided with a suitable signal insertion socket, and the signal is connected to the corresponding lamp row 4. The screw hole 52 is used to lock the electric control board 5 to the rotating chassis, and the notch 53 is provided for the power supply brush holder. The function of the electric control board 5 is to release the control command of the motor to keep the motor rotating at a predetermined speed. At the same time, the lights of the three lights are controlled at different times. The control method is described as follows: Figure 15 shows the functional block diagram of the entire electronic control system. The electronic control board 5 mainly includes the microcontroller 61, the motor drive circuit 62, the programming pin 651, the oscillator 652, and the power supply circuits 641, 642, and 643 in FIG. The microcontroller 61 is the core of the electronic control system, and mainly has a timer counter module, a PWM function module, an SPI module and a basic I/O function. In the embodiment of the present invention, the dsPIC30f3010 chip is used.

In Fig. 15, the programming pin 651 is a pin for connecting to the programmer, and the update of the control program and the display font/pattern is achieved by burning the pin 651. Oscillator 652 provides the clock source for microcontroller 652, which also serves as the clock reference for the timer.

There are three sets of power supplies required in Figure 15. The block diagram is shown in Figure 16. The power source obtained from the brush holder 26 is the 24V/3A used for the motor 6 and the 12V/10A power source used for the signal. The 12V/10A power supply then separates the 5V/1A and 5~6V/7A power supplies through the buck circuit.

The circuit design of the lamp row 4 is shown in Figure 17, and each LED is driven via a constant current IC to ensure the brightness of the LED. The invention selects DM114 as the constant current driving IC. Each DM114 accepts serial communication data to drive the LEDs on or off. In Figure 17, E is the enable control line, Clk is the serial transmission clock, Data is 0 or 1 data, and Lat is the latch signal. Each clock signal Clk will transfer 1 bit to the shift register inside the DM114, and 8 clocks will transmit 8 0101... In the embodiment of the present invention, there are 48 LEDs in each lamp row, and six DM114s are connected in series to form a 48-bit shift temporary storage, and each LED's on-off signal on the lamp row constitutes a 48-bit LED. The 0101... string enables the E pin of the DM114 to transmit 48 bits to six DM114s. The latch signal is obtained by the Lat, and the LED control of each LED on the lamp row 4 can be achieved.

The invention utilizes the effects of rotation and visual persistence of the RGB three primary colors to achieve display control of the desired text or pattern. In the embodiment of the present invention, since the DM 114 controls only the LEDs to be turned on and off, the color mixing effect of the color produced has eight colors. If a constant current IC with a brightness level of each LED is used, a more color display can be achieved. The text or pattern control method employed in the present invention is explained below.

The RGB three-color lamp row 4 of the present invention is disposed at equal intervals on the rotating circular chassis 2. When the motor drives the circular chassis 2 to rotate, its front view feels a cylindrical plane due to the persistence of vision, for example, to make the display appear A-shaped, as shown in FIG. When the lamp row 4 rotates at a high speed with the rotating chassis 2, different LEDs are turned on and off at different positions, and an A-shaped display effect can be produced. To achieve this display function, the DC motor 5 is first controlled to operate at a certain rotational speed. For example, in the embodiment of the present invention, the DC motor speed is set to 1000 RPM. If you switch 200 times to change the lamp number, you can switch the lamp number change every 0.3ms. Thanks to the effect of visual persistence, you can achieve the effect of rotating the display font or drawing. The control method to achieve this function is mainly to utilize the functions of the basic I/O, SPI serial communication, PWM and timer interrupt of the microcontroller.

In the embodiment of the present invention, the dsPIC30f3010 is used as the control core, and the control flow thereof is as shown in FIG. The main program starts, and the planning of the I/O pins and the declaration of the necessary variables are first performed in the #1 box. The #2 block performs the interrupt function setting, including interrupt enable, interrupt flag, and interrupt priority setting. The #3 block specifies the timer that the interrupt must be used by the CCP to serve as the time base for the interrupt. Such as 0.3ms interrupt once, the frequency of the PWM is planned. #3 also specifies the serial transmission setting of the SPI mode to perform the on-off modulation of each LED. The #1~#3 square is the initial setting and planning of the system operation, and the #4~#10 square is the main flow of control. Taking the interrupt of 0.3ms as an example, that is, at a speed of 1000 RPM, the number of lights is switched 200 times per revolution, and the time required to execute the #5~#10 block is less than 0.3 ms. The signal waiting for handshake is performed by the #4 block and the interrupt program of FIG. 10(b) to control the execution time of #4~#10 to be 0.3 ms.

As shown in Fig. 1, since the three rows of RGB lamps are arranged at equal intervals of 120°, each lamp row has 48 LEDs, so the light-off type/pattern of one lamp row is 3 words (WORD). . Taking an embodiment in which a fixed picture is displayed in a circle, for example, the font/pattern array displayed by the present invention requires a memory space of 3 × 3 × 200 words, that is, 3.6 K BYTES. If you want to increase the detail of the displayed glyph pattern, you can change the number of times the lamp is switched every revolution. Generally, the static LED array shows that if the resolution is 200*48, the number of LEDs in the entity is 9,600, and the resolution is fixed. To change the resolution, the number of LEDs must be increased. In the embodiment of the present invention, the lamp row is 48 LEDs, and the resolution 48 of the vertical direction cannot be changed. However, the horizontal direction of rotation, due to the principle of persistence of vision, if the number of switching of LEDs in a circle of rotation is 200, the resolution of the display is about 200*48, the number of switching is 400 times, and the resolution is approximately 400*48, the fineness of the display can be adjusted by software, as long as the calculation speed of the microcontroller chip is fast enough. From the general chip development tools, it is easy to judge whether the wafer calculation speed is fast enough. Taking the signal of 200 LEDs rotated one revolution as an example, the partial array format declared by the C programming language is as follows: Among them, data_R[3][200], data_G[3][200], and data_B[3][200] are array data of red, green, and blue light bars, for example, data_R[0][0], data_R[ 1][0]data_R[2][0] is an array pattern displayed by a red light bar, which occupies 48 BITs in 3 blocks and can control the on and off of 48 red LEDs.

Therefore, the #5 block in the flow chart 19 is mainly for reading the font/pattern array data of the lamp row, and then transmitting the 48 bit data to the DM114 constant current driving LED dedicated chip in the SPI mode, and the data transfer is completed. The data latches the control signal to lock the 48-bit control material latch to the output of the DM114 to control the LED's on and off. The #4~#9 block sequentially completes the data transmission and latching of the three RGB lights in an interrupt cycle. For the sake of simplicity, the illustration is represented by only one lamp row control flow.

Figure 19 (b) shows the flow of the interrupt program. The execution of a general fixed-cycle program is achieved with a timer interrupt. The instructions to be executed during the fixed period can be placed in the interrupt program or in the main program flow (such as #4~#10). The latter is used in the present invention, so the interrupt program only includes the timer initial value reset #11 block and the interrupt flag clear block #12.

Attachment 1 shows a physical diagram of the text display when the actual test of the present invention is performed, which can clearly see the displayed glyph, which shows the feasibility of the method proposed by the present invention.

In summary, the case is in full use of the industry, and the relevant products and approved patent announcements in the market have not seen the same technical features as the essence of the present invention, and are also legal and novel. Patent application requirements.提出 Submit a patent application in accordance with the law, and ask your review board to give the patent as soon as possible to ensure the rights and interests of the applicant. However, the present invention is only a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and equivalent changes or modifications made in accordance with the spirit of the present invention, such as applying different types of CPUs, changing interrupts. The time base, the change of the different LED constant current drive ICs, the interruption mode of the reference external clock, and the like are still covered in the patent application scope of the present invention.

1. . . Rotating display base

11. . . Metal plate

111. . . Screw hole

112. . . Round through hole

12. . . Slip pad

13. . . Insulation seat

131. . . Circular groove

132. . . Inner circular wall

133. . . Screw hole

134. . . Circular channel

14. . . Round copper ring

141. . . Power connection channel

15. . . Screw element

16. . . Accommodating space

161. . . Center through hole

17. . . Metal block

171. . . Bottom layer

1711. . . Screw hole

172. . . Second ring protrusion

173. . . Top hollow protrusion

1731. . . Center through hole

2. . . Rotating circular chassis

20. . . Ball bearing set

201. . . Motor mount

202. . . Ball bearing

203. . . Bearing retaining ring

204. . . Bearing fixing piece

205. . . Pad high

twenty one. . . Ball bearing

211. . . Center through hole

212. . . Bottom bearing surface

2122. . . Upper bearing surface

213. . . Screw hole

214. . . Screw hole

twenty two. . . Through hole

twenty three. . . Center through hole

twenty four. . . Screw hole

25. . . Brush holder

251. . . perforation

26. . . Lamp rack fixing ear

261. . . Screw hole

3. . . Light shelf

31. . . Screw hole

311. . . Screw hole

32. . . Screw hole

33. . . Fixing frame

331. . . Screw hole

332. . . Sheet

3321. . . Screw hole

4. . . Light row

41. . . Circuit board

42. . . Circuit board

43. . . Screw element

5. . . Electric control board

51. . . Through hole

52. . . Screw hole

53. . . gap

6. . . DC motor

61. . . Reducer

611. . . Output shaft

612. . . Screw hole

7. . . Power Supplier

The first picture is a three-dimensional diagram of the rotating display

The second picture is a three-dimensional illustration of the rotating display base (top view)

The third figure is a three-dimensional illustration of the insulation seat (top view)

The fourth figure is a three-dimensional illustration of the insulation seat (lower view)

Figure 5 Stereoscopic illustration of the rotating display base (bottom view)

Figure 6 Rotating the base of the display base

Figure 7: Decomposition diagram of the base of the rotating display

Figure 8 Rotary display motor and reducer combination icon

Figure 9 Rotating Chassis Rotating Display

Figure 10 Graphical representation of the ball bearing set for a rotating display

Figure 11 Three-dimensional illustration of the rotating display LED light rack

Twelfth Figure Rotating Display Light Bar Top Fixing Frame Icon

Thirteenth Diagram Rotating Display Light Bar Icon

Figure 14 Diagram of the electronic control board of the rotating display

Figure 15 Block diagram of the electronic control system of the rotating display

Figure 16 Block diagram of the power system of the rotating display

Figure 17 Schematic diagram of the lamp row circuit of the rotating display

Figure 18 Schematic diagram of font/pattern rotation display

Figure 19 Rotary display software control flow chart

Figure 20 Rotating display test result entity diagram

1. . . Rotating display base

11. . . Metal plate

12. . . Slip pad

2. . . Rotating circular chassis

25. . . Brush holder

3. . . Light shelf

33. . . Fixing frame

331. . . Screw hole

332. . . Sheet

4. . . Light row

5. . . Electric control board

6. . . DC motor

7. . . Power Supplier

Claims (10)

A rotary LED display device and a control method thereof, comprising: a base for carrying a rotating display body, wherein a hollow metal flat plate is arranged thereon, and a flat hollow ring on the upper surface of the metal flat plate is provided with a plurality of concave Insulation seat of the slot; a plurality of copper rings are embedded in the groove of the insulating seat, the ball bearing group and the metal block are arranged in the hollow part; the plurality of anti-slip sets are arranged on the lower surface of the metal plate; a circular rotating chassis is fixed The upper surface of the ball bearing set provided on the base can be freely rotated; the center of the rotating chassis is provided with a through hole for the DC motor to be pierced, and a symmetrical fan-shaped through hole is arranged along the center of the circle, and three circularly shaped lamp rows are fixed in the circumferential symmetry. The ear and the fixed side of the fixed ear are provided with screw holes, and the position of the copper ring of the base is matched with the two brush holders symmetrically. When the brush is placed, the contact point can be electrically connected with the copper ring; the plurality of lamp rows are symmetric. The fixed ear is set on the rotating chassis; the side of the lamp row frame is in the shape of a U-shaped body, and the fixed end of the bottom of the lamp row frame is equipped with a screw hole for fixing the rotating chassis; the upper edge of the lamp rack is also a screw hole, a mounting bracket at the top of the lamp rack The fixing frame is a combination of three metal sheets, the center is provided with a fixed fulcrum, the three metal sheets are symmetrically arranged, the end is L-shaped, the side wall is provided with a fixing screw hole; and the plurality of red, green and blue LEDs The lamp row is fixed on the corresponding lamp bay; the DC motor is vertically arranged in the motor stator of the ball bearing group, and the output shaft is stopped by the through hole at the top of the base metal block for driving the rotating chassis to rotate; An electronic control circuit board for controlling the signal rotation of the DC motor and the LED lamp row; a power supply device for providing power required for operation of the display; and a control method for the LED light bar for displaying the display when the lamp row is rotated Desire type or pattern. The rotary LED display device and the control method according to claim 1, wherein the ball bearing set is provided with a bearing fixing ring on the inner side of the ball bearing, and the fixing ring is provided with a plurality of screw holes for a plurality of bearing pillars. The upper ring of the fixing ring is provided with a bearing fixing piece and a padding piece, and the lower edge of the fixing ring is provided with a motor fixing piece; the bearing fixing piece, the motor fixing piece and the padding piece are also arranged with respect to the screw hole position of the fixing ring; The through hole is fixed by the screwing component; the inner side of the motor fixing piece is provided with a screw hole, and the opposite screw hole of the DC motor assembly surface is assembled. The rotary LED display device and the control method according to the first aspect of the invention, wherein the metal block provided on the base is a stepped three-section annular protrusion, and the bottom layer is provided with a plurality of screw holes, and the middle layer is sized. It is about the same as the through hole of the metal flat plate of the base; the metal block is set from the bottom to the top and can be screwed with the metal flat plate; the top protrusion is provided with a through hole penetrating through the metal block for the output shaft of the DC motor. The screw has holes on the side of the protrusion for the screw to tighten the output shaft of the DC motor. The rotary LED display device and the control method according to claim 1, wherein the lamp row is a circuit board inside and outside the wiring of the circuit design, the outer circuit board is provided with a plurality of LEDs, and the inner circuit board is provided with The resistor, the capacitor and the LED constant current drive the driving IC, and the inner and outer two-layer circuit boards are connected and connected by the connector pins; the inner circuit board is provided with a plurality of screw holes to lock the lamp row frame; the constant current driving IC receives the string The control signals are listed to control the lighting control of the corresponding channel LED connected to the constant current driving IC, and the three groups of lights are respectively red, blue and green. The rotary LED display device and the control method according to claim 1, wherein the electronic control circuit board has a ring design, and is provided with a micro control chip, a motor drive, a program burning circuit, and the like; The DC motor is disposed, and the two sides are symmetrically provided with a notch for the power supply brush holder, and the symmetrical ring is provided with a plurality of screw holes, and the 俾 is combined with the corresponding screw hole of the rotating chassis. The rotary LED display device and the control method according to claim 1, wherein the LED lamp row control method mainly uses a timer interrupt technology of the microcontroller chip to execute an interrupt program at a predetermined frequency; The execution cycle of the program includes reading of the LED display data, and transmitting the display data to the driving circuit of the LED light bar in a serial transmission to control the LED light bar light on and off control. The rotary LED display device and the control method according to claim 6, wherein the timer of the microcontroller chip counts the system, and the timer is set by the software instruction to set an initial value; When the overflow is counted, an interrupt request can be generated to the central processing unit of the microcontroller chip to execute the corresponding interrupt program, and the frequency of the interrupt is determined by the initial value of the timer. The rotary LED display device and the control method according to claim 6, wherein each LED on the lamp row is connected to an output channel of the constant current IC; The number of constant current ICs required by the LED is determined by the number of output channels of the constant current IC; the serial signal transmitted by the N LEDs is N bits, and after the N-bit serial signal is transmitted, the latch command is issued, that is, The LEDs of the LED light row can be controlled to be turned off, and the control actions performed by the three groups of lamps are the same. The rotary LED display device and the control method according to claim 6, wherein the read display data is pre-stored in the memory of the microcontroller in a red, blue and green array, and the size of the array is circular. The number of times the lamp is switched for each rotation of the rotating chassis and the number of LEDs of the lamp row, the higher number of lamp changes can achieve a more detailed display effect, and the number of changes of the lamp number is preferably more than 200 times per revolution. That is, the number of interruptions performed per revolution of the rotating chassis is more than 200 times. The rotary LED display device and the control method according to claim 6, wherein the serial transmission protocol is preferably a SPI serial transmission mode, and the transmission clock is preferably 20 MHz or more.