CN210039587U

CN210039587U - Control circuit of holographic display device

Info

Publication number: CN210039587U
Application number: CN201920701131.0U
Authority: CN
Inventors: 喻世杰; 王禹童; 侯志伟; 蔡壮
Original assignee: Shenzhen Core Motion Electronics Technology Co Ltd
Current assignee: Shenzhen Core Motion Electronics Technology Co Ltd
Priority date: 2019-05-16
Filing date: 2019-05-16
Publication date: 2020-02-07
Anticipated expiration: 2029-05-16

Abstract

The utility model discloses a holographic display device's control circuit, including MCU microcontroller, power supply circuit, WIFI module circuit, LED display circuit, the infrared signal circuit all connected with MCU microcontroller to and the motor control circuit who all is connected with MCU microcontroller, infrared signal circuit. The control circuit of the utility model adopts the LED display circuit to be directly connected to the power circuit, thus solving the problem of insufficient power supply of the LED display circuit and improving the display brightness; meanwhile, image data to be displayed are transmitted to the holographic display device in a long distance through the WIFI module circuit; after the motor is controlled to be started and rotated through the infrared signal circuit, the rotating speed of the motor is accurately adjusted in real time by utilizing the Hall sensor to be matched with the rotating speed required by display, the display picture is accurately controlled to be positioned, the display effect is improved, the problems of unstable picture, jitter, poor picture rotation and the like during display are solved, and the use is more convenient.

Description

Control circuit of holographic display device

Technical Field

The utility model relates to a video display control technical field, more specifically relates to a holographic display device's control circuit.

Background

At present, a large number of LED screens are available on the market, and most of the LED screens on the market are traditional two-dimensional LEDs, namely traditional rectangular LEDs, which are used for displaying characters and simple figures. With the increasing demand for Vision, holographic (POV) display devices have been developed.

The holographic display device is a display device for imaging based on the principle of human visual persistence, and the arrangement of the imaging element LED is specially designed for a special rotating structure. When the holographic display device rotates, the patterns formed by the LEDs can form residual images on the retinas of human eyes at each position of each moment, and when the holographic display device rotates for a circle, a complete picture pattern can be displayed. At sufficiently high rotational speeds and imaging speeds, the displayed pattern will eventually result in smooth video content.

Based on the traditional LED display device, the POV effect is utilized to form holographic display by controlling the rotation of the motor and the LED, but the problems of insufficient display brightness, color reduction degree, picture jitter and the like generally exist in the similar products.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the present invention is to provide a control circuit for a holographic display device, which is directed to the above-mentioned defects of the prior art.

The utility model provides a technical scheme that its technical problem adopted is: the control circuit of the holographic display device comprises an MCU (microprogrammed control unit), a power supply circuit, a WIFI (wireless fidelity) module circuit, an LED (light-emitting diode) display circuit, an infrared signal circuit and a motor control circuit, wherein the power supply circuit, the WIFI module circuit, the LED display circuit and the infrared signal circuit are connected with the MCU, and the motor control circuit is connected with the power supply circuit and the infrared signal circuit;

the power supply circuit is used for supplying power to the MCU microcontroller, the WIFI module circuit, the LED display circuit, the infrared signal circuit and the motor control circuit; the infrared signal circuit sends an infrared carrier signal to the motor control circuit according to a control command of the MCU; the motor control circuit is used for controlling the motor of the holographic display device to rotate according to the infrared carrier signal sent by the infrared signal circuit so as to drive the at least one LED fan blade to rotate at a high speed according to a preset speed; the LED display circuit is used for driving an LED lamp on at least one LED fan blade to carry out holographic display on image data to be displayed; and the image data to be displayed is received from an external intelligent terminal through the WIFI module circuit.

Preferably, the system also comprises 2 signal amplification circuits which are connected with the MCU and the plurality of signal commutation processing circuits.

Preferably, the system also comprises an SD card circuit, a FLASH storage circuit and a plurality of signal commutation processing circuits which are connected with the MCU microcontroller;

the WIFI module circuit sends image data to be displayed to the SD card circuit for storage through the MCU controller, the MCU microcontroller reads the image data to be displayed in the SD card circuit again and caches or reads the image data through the FLASH storage circuit, and the MCU microcontroller sends the image data to the LED display circuit after reading the image data and sends the image data to be displayed to the LED display circuit through the plurality of signal commutation processing circuits and the signal amplification circuit.

Preferably, the LED display circuit includes a plurality of LED driving circuits and a plurality of LED driving chips; the number of the LED driving circuits is the same as the row number of the LED fan blades; the number of the signal commutation processing circuits is equal to the number of the LED driving circuits.

Preferably, the infrared signal circuit comprises an infrared transmitting circuit and an infrared receiving circuit; the infrared transmitting circuit is connected with the signal amplifying circuit and arranged together and is used for transmitting an infrared carrier signal; the infrared emission circuit comprises 4 infrared emission tubes; the infrared receiving circuit is connected with the motor control circuit and arranged together and is used for receiving an infrared carrier signal; the infrared receiving circuit comprises 2 infrared receiving chips.

Preferably, the device also comprises a Hall sensor circuit connected with the MCU and the motor control circuit, and a magnet arranged together with the motor; the Hall sensor circuit and the magnet are matched for magnetic induction to be used for detecting the real-time rotating speed of the motor and feeding back the real-time rotating speed to the MCU.

Preferably, the power supply circuit includes a coupling circuit and a voltage-reducing circuit; the coupling circuit is used for decoupling and converting an external power supply into 5V voltage and supplying power to each signal commutation processing circuit, the signal amplification circuit, the LED display circuit, the infrared signal circuit and the motor control circuit; the voltage reduction circuit is connected with the coupling circuit, reduces the voltage of 5V and converts the voltage into 3.3V voltage, and is used for supplying power to the MCU, the WIFI module circuit, the FLASH storage circuit and the Hall sensor circuit.

Preferably, the motor control circuit comprises a power supply booster circuit and a motor main control chip; the power supply booster circuit is connected with the coupling circuit, boosts and converts the 5V voltage into 12V voltage, and is used for supplying power to the motor; and the motor main control chip is connected with the infrared receiving circuit and the motor.

Preferably, the device further comprises a USB connector, an NMOS switch and a crystal oscillator which are connected with the MCU.

Preferably, the MCU microcontroller is an STM32 chip.

Implement the utility model discloses holographic display device's control circuit's technical scheme has following advantage or beneficial effect: the control circuit of the utility model adopts the LED display circuit to be directly connected to the power circuit, thus solving the problem of insufficient power supply of the LED display circuit and improving the display brightness; meanwhile, image data to be displayed are transmitted to the holographic display device in a long distance through the WIFI module circuit; after the motor is controlled to be started and rotated by the infrared signal circuit, the rotating speed of the motor is accurately adjusted in real time by the Hall sensor to be matched with the rotating speed required by display, the display picture is accurately controlled to be positioned, the display effect is improved, the defects of unstable picture, jitter and poor picture rotation during display are overcome, and the use is more convenient.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and 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 without inventive work, and in the drawings:

FIG. 1 is a schematic diagram of a first module of an embodiment of a control circuit of a holographic display device according to the present invention;

FIG. 2 is a schematic diagram of a second module of an embodiment of a control circuit of the holographic display device according to the present invention;

FIG. 3 is a schematic diagram of a third module of an embodiment of a control circuit of the holographic display device according to the present invention;

fig. 4 is a schematic circuit diagram of the MCU microcontroller according to the embodiment of the control circuit of the holographic display device of the present invention;

FIG. 5 is a schematic diagram of a power circuit of an embodiment of a control circuit of the holographic display device according to the present invention;

FIG. 6 is a schematic diagram of a signal amplifying circuit of an embodiment of a control circuit of the holographic display device according to the present invention;

fig. 7 is a schematic diagram of a signal commutation processing circuit according to an embodiment of the control circuit of the holographic display device of the present invention;

fig. 8 is a schematic diagram of a power supply boosting circuit according to an embodiment of the control circuit of the holographic display device of the present invention;

fig. 9 is a schematic circuit diagram of a motor main control chip of a control circuit embodiment of the holographic display device of the present invention.

Detailed Description

In order to make the objects, aspects and advantages of the present invention more apparent, various exemplary embodiments to be described hereinafter will be referred to in the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various exemplary embodiments in which the invention may be practiced, the same numerals in different drawings referring to the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. It is to be understood that they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims, and that other embodiments may be used, or structural and functional modifications may be made to the embodiments set forth herein, without departing from the scope and spirit of the present disclosure. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

In order to explain the technical solution of the present invention, the following description is made by using specific examples.

Fig. 1 to 9 are schematic diagrams showing embodiments of a control circuit of the holographic display device according to the present invention, and for convenience of explanation, only the portions related to the embodiments of the present invention are shown. The utility model discloses holographic display device's control circuit embodiment, including MCU microcontroller 100, power supply circuit 101, WIFI module circuit 102, LED display circuit 103, infrared signal circuit 104 all are connected with MCU microcontroller 100 to and the motor control circuit 106 who is connected with power supply circuit 101 and infrared signal circuit 104. Preferably, the MCU microcontroller 100, which is a master control chip, may be an STM32 chip, such as an STM32F4 series chip (as shown in the circuit diagram of fig. 4), or other series chips of the company, or different series chips of other companies. It should be noted that the implementations in fig. 1-3 represent signal connection lines and the dashed lines represent power connection lines.

Specifically, the power circuit 101 is configured to supply power to the MCU microcontroller 100, the WIFI module circuit 102, the LED display circuit 103, the infrared signal circuit 104, and the motor control circuit 106; the infrared signal circuit 104 is used for sending an infrared carrier signal to the motor control circuit 106 according to a control command of the MCU 100; the motor control circuit 106 is used for controlling the motor 200 of the holographic display device to rotate according to the infrared carrier signal sent by the infrared signal circuit 104 so as to drive at least one LED fan blade to rotate at a high speed according to a preset speed; the LED display circuit 103 is used for driving a plurality of LED lamps 200 on at least one LED fan blade to perform holographic display on image data to be displayed; image data to be displayed is received from an external intelligent terminal through the WIFI module circuit 102. Preferably, the holographic display device includes at least one LED fan, for example, 1, 2, 3, 4, and the like, and preferably 4, and each LED fan is provided with a plurality of LED lamps, and the specific number is not limited herein.

In this embodiment, the power circuit 101 is configured to supply power to the MCU microcontroller 100, the WIFI module circuit 102, the LED display circuit 103, the infrared signal circuit 104, and the motor control circuit 106. As shown in fig. 5, the power supply circuit 101 includes a coupling circuit 1011 and a voltage step-down circuit 1012; the coupling circuit 1011 decouples and converts an accessed external power supply into a voltage of 5V, and is used for supplying power to each of the signal commutation processing circuit 109, the signal amplification circuit 110, the LED display circuit 103, the infrared signal circuit 104 and the motor control circuit 106; the voltage reduction circuit 1012 is connected with the coupling circuit 1011, and reduces the voltage of 5V to 3.3V, and is used for supplying power to the MCU microcontroller 100, the WIFI module circuit 102, the FLASH memory circuit 108, and the hall sensor circuit 105. The voltage step-down circuit 1012 includes a power chip U12.

As shown in the circuit diagrams of fig. 4-9, the coupling circuit 1011 connects to the power supply DC 5V to supply power by connecting to the following: (1) the power supply DC 5V voltage is subjected to bypass/decoupling by C24 and C3, then is subjected to voltage reduction and conversion by a voltage reduction circuit 1012 (a voltage reduction chip U12) into a 3.3V voltage, and is subjected to decoupling by C2 and C30 and then is connected to VCC pins of 6, 17, 30, 32, 33, 39, 52, 62, 72, 84, 95, 108, 121, 131, 142 and 144 of the MCU microcontroller 100 and VCC pins of 11 th and 33 th of a FLASH memory circuit 108 (a FLASH chip U15), VCC pins of 8 and 9 of a WIFI module circuit, a 2 nd VCC pin of a Hall sensor circuit U13 and a 2 nd VCC pin of an NMOS switch. (2) The DC 5V voltage is connected to VCC pins of 8 signal

commutation processing circuits

109, 2 signal amplification circuits U10 and U11. (3) The DC 5V voltage is connected to the VCC pin of U1, the infrared receiving chip L2, L3 of the motor control circuit 106. (4) The DC 5V voltage is connected to the VCC pin of the LED driving chip of the LED display circuit 103.

As shown in fig. 8-9, a motor control circuit 106 for controlling the motor 200 of the holographic display device to rotate so as to drive at least one LED fan (not shown) to rotate at a high speed according to a predetermined speed; specifically, the motor control circuit 106 includes a power boost circuit 1061 and a motor main control chip 1062; the power supply boosting circuit 1061 is connected to the coupling circuit 1011, and boosts and converts the 5V voltage into a 12V voltage, and is used for supplying power to the motor 200; the motor main control chip 1062 is connected to the infrared receiving circuit 1042 and the motor 200, and preferably, the model of the motor main control chip 1062 is an STC15W101 single chip microcomputer chip.

In this embodiment, the MCU microcontroller 100 further includes an SD card circuit 107, a FLASH memory circuit 108, a plurality of signal commutation processing circuits 109, and a signal amplification circuit 110, which are all connected to the MCU microcontroller 100; and the system also comprises 2 signal amplification circuits 110 which are connected with the MCU microcontroller 100 and the plurality of signal commutation processing circuits 109. Specifically, the WIFI module circuit 102 sends image data to be displayed to the SD card circuit 107 for storage through the MCU microcontroller 100, the MCU microcontroller 100 reads the image data to be displayed in the SD card circuit 107 again and buffers or reads the image data through the FLASH memory circuit 108, and the MCU microcontroller 100 reads the image data and sends the image data to the LED display circuit 103 through the plurality of signal commutation processing circuits 109 and the signal amplification circuit 110.

In this embodiment, the LED display circuit 103 is configured to drive a plurality of LED lamps 300 on at least one LED fan blade to perform holographic display on image data to be displayed; image data to be displayed is received from an external intelligent terminal through the WIFI module circuit 102. Specifically, the LED display circuit 103 includes a plurality of LED driving circuits 1031 and a plurality of LED driving chips 1032; the number of the LED driving circuits 1031 is the same as the number of rows of the LED fan blades; the number of the signal commutation processing circuits 109 × the number of the LED driving circuits 1031 is the number of the LED driving chips 1032. Preferably, the number of the LED driving circuits 1031 and the number of rows of the LED fan blades are 4, that is, the holographic display device is provided with 4 LED fan blades, and correspondingly, there are 4 LED driving circuits 1031, each LED driving circuit 1031 controls one LED fan blade, and at the same time, the number of the signal commutation processing circuits 109 is 8, so that the number of the LED driving chips 1032 is 32, and the LED lamps 300 of 128 RGB are correspondingly controlled. Specifically, a circuit diagram of each signal commutation processing circuit 109 is shown in fig. 7.

In this embodiment, the infrared signal circuit 104 sends an infrared carrier signal to the motor control circuit 106 according to a control command of the MCU microcontroller 100; the infrared signal circuit 104 includes an infrared transmitting circuit 1041 and an infrared receiving circuit 1042; the infrared transmitting circuit 1041 is connected to and disposed together with one signal amplifying circuit 110, and is configured to transmit an infrared carrier signal; wherein, the infrared transmitting circuit 1041 is U11, and the infrared transmitting circuit 1041 includes 4 infrared transmitting tubes D2, D3, D4 and D5 (as shown in fig. 6); and an infrared receiving circuit 1042 connected with and disposed together with the motor control circuit 106 for receiving the infrared carrier signal, wherein the infrared receiving circuit 1042 comprises 2 infrared receiving chips L2 and L3 (as shown in fig. 9).

In this embodiment, the controller further includes a hall sensor circuit 105 connected to both the MCU microcontroller 100 and the motor control circuit 106, and a magnet disposed together with the motor 200 (motor main control chip); the hall sensor circuit 105 and the magnet are magnetically induced and matched to detect the real-time rotation speed of the motor 200, and feed back the real-time rotation speed to the MCU microcontroller 100. Specifically, every time the motor rotates for one circle, the hall sensor circuit 105 and the magnet perform magnetic induction once, and the LED fan blades can be repositioned and the rotating speed can be calculated (calculated by combining the time provided by the crystal oscillator 112) through the magnetic induction, so that the rotating speed of the motor can be regulated and controlled in real time, and the holographic display of the image can be controlled more accurately.

In this embodiment, the MCU microcontroller 100 further includes a USB connector 113 connected to the MCU microcontroller 100, an NMOS switch 111, and a crystal oscillator 112, specifically, the USB connector 113 is used for data transmission and the like of the holographic display device, the NMOS switch 111 is used for switching control, and the crystal oscillator 112 is used for providing time information.

The utility model discloses holographic display device's control circuit's theory of operation does: image data to be displayed are sent to the SD card circuit through the WIFI module circuit, the MCU microcontroller reads the image data in the SD card circuit and caches the image data through the FLASH storage circuit, 8 signal commutation processing circuits carry out phase switching of a diagram and the signal amplification circuit transmits the data to a data port of each LED driving chip of the LED display circuit, and the LED driving chips carry out data processing and light corresponding RGBLED according to corresponding logic; meanwhile, the MCU microcontroller transmits infrared carrier signals through infrared transmitting tubes D2, D3, D4 and D5, infrared receiving chips L2 and L3 of the motor control circuit receive the infrared carrier signals, the demodulated signals are connected to pins 3 and 7 of a U3 of a motor main control chip, corresponding signals are output to a PWM port of the motor through a pin 5 of U3 through modulation, PWM control of the motor is carried out, and meanwhile, when the motor has unstable rotating speed, a Hall sensor connected through a pin 34 of the MCU microcontroller converts the signals into digital signals through magnetic induction through a magnet on the motor control circuit and feeds the digital signals back to the MCU microcontroller to adjust the rotating speed of the motor so as to match the display rotating speed required by LED display.

The utility model discloses control circuit adopts LED partial circuit lug connection to input circuit, has solved the not enough problem of LED display circuit power supply, has promoted the demonstration luminance of product. Meanwhile, the image data to be displayed is transmitted to the holographic display device in a long distance through the WIFI module circuit. After the motor is controlled to be started to rotate through infrared signals, the rotating speed of the motor is accurately adjusted in real time by utilizing the Hall sensor to be matched with the rotating speed required by display, the display picture is accurately controlled to be positioned, the display effect is improved, the problems of unstable pictures, jitter, poor picture rotation and the like during display are solved, and the product is more convenient to use.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application belong to the protection scope of the present invention.

Claims

1. The control circuit of the holographic display device is characterized by comprising an MCU (microprogrammed control unit) microcontroller (100), a power supply circuit (101), a WIFI module circuit (102), an LED display circuit (103), an infrared signal circuit (104) and a motor control circuit (106), wherein the power supply circuit (101) and the infrared signal circuit (104) are all connected with the MCU microcontroller (100);

the power supply circuit (101) is used for supplying power to the MCU microcontroller (100), the WIFI module circuit (102), the LED display circuit (103), the infrared signal circuit (104) and the motor control circuit (106);

the infrared signal circuit (104) sends an infrared carrier signal to the motor control circuit (106) according to a control command of the MCU (100);

the motor control circuit (106) is used for controlling a motor (200) of the holographic display device to rotate according to the infrared carrier signal sent by the infrared signal circuit (104) so as to drive at least one LED fan blade to rotate at a high speed according to a preset speed;

the LED display circuit (103) is used for driving a plurality of LED lamps (300) on at least one LED fan blade to perform holographic display on image data to be displayed; the image data to be displayed is received from an external intelligent terminal through the WIFI module circuit (102).

2. The control circuit of the holographic display of claim 1, further comprising 2 signal amplification circuits (110) connected to the MCU microcontroller (100) and the plurality of signal commutation processing circuits (109).

3. The control circuit of the holographic display of claim 2, further comprising an SD card circuit (107), a FLASH memory circuit (108), a plurality of signal commutation processing circuits (109) all connected with the MCU microcontroller (100);

the WIFI module circuit (102) sends the image data to be displayed to the SD card circuit (107) for storage through the MCU microcontroller (100), the MCU microcontroller (100) reads the image data to be displayed in the SD card circuit (107) again and caches or reads the image data through the FLASH storage circuit (108), and the MCU microcontroller (100) sends the image data to be displayed to the LED display circuit (103) through the plurality of signal commutation processing circuits (109) and the signal amplification circuit (110) after reading.

4. The control circuit of the holographic display of claim 3, in which the LED display circuit (103) comprises a plurality of LED drive circuits (1031) and a plurality of LED drive chips (1032);

the number of the LED driving circuits (1031) is the same as the row number of the LED fan blades;

the number of the signal commutation processing circuits (109) × the number of the LED driving circuits (1031) × the number of the LED driving chips (1032).

5. The control circuit of the holographic display of claim 3, in which the infrared signal circuit (104) comprises an infrared transmitting circuit (1041) and an infrared receiving circuit (1042);

the infrared transmitting circuit (1041) is connected with the signal amplifying circuit (110) and arranged together, and is used for transmitting the infrared carrier signal; the infrared emission circuit (1041) comprises 4 infrared emission tubes;

the infrared receiving circuit (1042) is connected with the motor control circuit (106), arranged together and used for receiving the infrared carrier signal; the infrared receiving circuit (1042) comprises 2 infrared receiving chips.

6. The holographic display of the control circuit, as set forth in claim 5, further comprising a Hall sensor circuit (105) connected to both the MCU microcontroller (100) and the motor control circuit (106), and a magnet disposed with the motor (200);

the Hall sensor circuit (105) and the magnet are matched in a magnetic induction mode and used for detecting the real-time rotating speed of the motor (200) and feeding back the real-time rotating speed to the MCU (100).

7. The control circuit of the holographic display of claim 6, wherein the power supply circuit (101) comprises a coupling circuit (1011) and a voltage step-down circuit (1012);

the coupling circuit (1011) is used for decoupling and converting an external power supply into 5V voltage and supplying power to the signal commutation processing circuit (109), the signal amplification circuit (110), the LED display circuit (103), the infrared signal circuit (104) and the motor control circuit (106);

the voltage reduction circuit (1012) is connected with the coupling circuit (1011), reduces the voltage of the 5V voltage to be converted into a voltage of 3.3V, and is used for supplying power to the MCU microcontroller (100), the WIFI module circuit (102), the FLASH storage circuit (108) and the Hall sensor circuit (105).

8. The holographic display's control circuit of claim 7, in which the motor control circuit (106) comprises a power boost circuit (1061) and a motor master control chip (1062);

the power supply boosting circuit (1061) is connected with the coupling circuit (1011), boosts and converts the 5V voltage into 12V voltage, and is used for supplying power to the motor (200);

and the motor main control chip (1062) is connected with the infrared receiving circuit (1042) and the motor (200).

9. The control circuit of the holographic display of claim 1, further comprising a USB connector (113), an NMOS switch (111) and a crystal oscillator (112) connected to the MCU microcontroller (100).

10. The control circuit of the holographic display of any of claims 1-9, in which the MCU microcontroller (100) is an STM32 chip.