Interaction control circuit of LED display screen

Abstract

The utility model relates to the field of LED display circuits, and discloses an interaction control circuit of an LED display screen. According to the method, N HDMI input interfaces, an MCU controller, an LED serial port and a relay control module are included; the N HDMI input interfaces are connected with the MCU controller, the MCU controller is connected with the LED serial port, and the MCU controller is connected with the relay control module; the N HDMI input interfaces are used for being connected with external conference equipment, the external conference equipment transmits CEC control signals to the N HDMI input interfaces, the N HDMI input interfaces transmit the CEC control signals to the MCU controller, the MCU controller converts the CEC control signals into display control signals and transmits the display control signals to the LED serial port, and the MCU controller converts the CEC control signals into power-on signals and transmits the power-on signals to the relay control module. In the embodiment of the utility model, the smooth display of the external LED display screen is realized with low cost.

Description

Technical Field

[0001] The utility model relates to the field of LED display circuits, in particular to an interactive control circuit of an LED display screen. Background Art

[0002] As the core equipment of modern conference and exhibition, the functions and performance requirements of LED display all-in-one conference machine are becoming increasingly complex. In terms of connection and communication, it needs to interact seamlessly with various devices (such as computers, mobile phones, projectors, etc.), from traditional computers and mobile phones to modern projectors and smart devices, to meet the diverse needs in different scenarios. In order to achieve this connection, the LED display all-in-one conference machine must support multiple communication protocols and interfaces to ensure compatibility with various devices.

[0003] LED display conference all-in-one needs to take into account both high performance and energy saving and environmental protection. By adopting intelligent dimming technology and dynamic power consumption management, it can dynamically adjust the display brightness and power consumption according to the ambient brightness and usage to minimize energy consumption and extend the life of the device. At the same time, the built-in intelligent system can also optimize the energy utilization efficiency of the device and further improve the overall energy-saving performance.

[0004] However, when the LED display all-in-one conference machine is connected to a third-party conference box, the LED display will have problems such as board redundancy and display delay, so a technology is needed to solve the current problem. Utility Model Content

[0005] The main purpose of the utility model is to solve the technical problems of board redundancy and display delay in the LED display screen when the LED display screen conference all-in-one machine is connected to a third-party conference box.

[0006] The first aspect of the utility model provides an interactive control circuit of an LED display screen, the interactive control circuit of the LED display screen comprising:

[0007] N HDMI input interfaces, MCU controller, LED serial port, relay control module, where N is a positive integer not less than 2;

[0008] The N HDMI input interfaces are connected to the MCU controller, the MCU controller is connected to the LED serial port, and the MCU controller is connected to the relay control module;

[0009] The N HDMI input interfaces are used to connect external conference equipment, the external conference equipment transmits CEC control signals to the N HDMI input interfaces, the N HDMI input interfaces transmit the CEC control signals to the MCU controller, the MCU controller converts the CEC control signals into display control signals and transmits them to the LED serial port, the MCU controller converts the CEC control signals into power-on signals and transmits them to the relay control module, and the relay control module powers on the external conference equipment and the LED display screen corresponding to the LED serial port based on the power-on signals.

[0010] Optionally, in a first implementation of the first aspect of the utility model, it further includes: an audio output interface and a signal conversion module, wherein the signal conversion module is connected to the MCU controller, the signal conversion module is connected to the N HDMI input interfaces, and the audio output interface is connected to the MCU controller;

[0011] The external conferencing device transmits the HDMI audio signal to the N HDMI input interfaces, and the N HDMI input interfaces transmit the HDMI audio signal to the signal conversion module. The signal conversion module and the MCU controller perform signal control configuration to convert the HDMI audio signal into a universal audio signal and transmit it to the audio output interface.

[0012] Optionally, in the second implementation method of the first aspect of the utility model, it also includes: an HDMI output interface, the HDMI output interface is connected to the MCU controller and the signal conversion module, and the MCU controller converts the CEC control signal into a modulated CEC control signal and transmits it to the HDMI output interface.

[0013] Optionally, in a third implementation of the first aspect of the utility model, the audio output interface includes: a 3.5mm audio interface.

[0014] Optionally, in a fourth implementation of the first aspect of the utility model, the signal conversion module includes: a GSV2007 chip.

[0015] Optionally, in a fifth implementation of the first aspect of the utility model, the N HDMI input interfaces include: a first HDMI input interface and a second HDMI input interface, the first HDMI input interface transmits a first CEC control signal to the MCU controller, the second HDMI input interface transmits a second CEC control signal to the MCU controller, and the MCU controller converts the first CEC control signal and the second CEC control signal into display control signals and transmits them to the LED serial port.

[0016] Optionally, in a sixth implementation of the first aspect of the utility model, the N HDMI input interfaces include: a first HDMI input interface and a second HDMI input interface, the first HDMI input interface transmits a first CEC control signal to the second HDMI input interface, and the second HDMI input interface transmits the first CEC control signal and the second CEC control signal to the MCU controller.

[0017] Optionally, in a seventh implementation of the first aspect of the utility model, the MCU controller includes an STM32F103 chip.

[0018] Optionally, in an eighth implementation of the first aspect of the utility model, the LED serial port includes: a 4PIN screen control serial port.

[0019] Optionally, in a ninth implementation of the first aspect of the utility model, the relay control module includes: an 8-channel relay controller.

[0020] In the embodiment of the utility model, the MCU controller is used instead of the SOC as the main control conference board, which greatly reduces the use cost and solves the problem of board redundancy in the scenario of introducing a third-party conference box. In addition, the MCU controller is used to simultaneously process the CEC signals of multiple HDMI interfaces, making the signal control smoother, solving the problem of display delay of the LED display, and realizing the smooth connection between the LED display and the third-party conference box, achieving a more efficient, convenient and comfortable conference experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the overall architecture diagram of the interactive control circuit of the LED display screen in the embodiment of the utility model;

[0022] Figure 2 This is the first specific embodiment of the interactive control circuit of the LED display screen in the utility model;

[0023] Figure 3 This is the second specific embodiment of the interactive control circuit of the LED display screen in the present utility model. DETAILED DESCRIPTION

[0024] The embodiment of the utility model provides an interactive control circuit of an LED display screen.

[0025] The following will describe the embodiments of the present invention in more detail with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0026] In the description of the embodiments disclosed in the present utility model, the term "including" and similar terms should be understood as open inclusion, that is, "including but not limited to". The term "based on" should be understood as "based at least in part on". The term "one embodiment" or "the embodiment" should be understood as "at least one embodiment". The terms "first", "second", etc. may refer to different or the same objects. Other explicit and implicit definitions may also be included below.

[0027] For ease of understanding, the specific process of the embodiment of the utility model is described below. Figure 1 , the overall architecture diagram of the interactive control circuit of the LED display screen in the embodiment of the utility model, the interactive control circuit of the LED display screen includes:

[0028] 2 HDMI input interfaces, MCU controller, LED serial port, relay control module;

[0029] 2 HDMI input interfaces are connected to the MCU controller, the MCU controller is connected to the LED serial port, the MCU controller is connected to the relay control module, and the 2 HDMI input interfaces are used to connect external conference equipment (conference box). Figure 1 An HDMI input interface is connected to the HDMI interface of an external conference device, and the external conference device transmits a CEC control signal to the HDMI input interface through the HDMI interface, and the HDMI input interface transmits the CEC control signal to the HDMI input interface, and the HDMI input interface transmits the CEC control signal to the MCU controller, and the MCU controller converts the CEC control signal into a display control signal and transmits it to the LED serial port, and the LED serial port controls the display of the external LED display screen. In the MCU controller, the CEC control signal is converted into a power-on signal and transmitted to the relay control module, and the relay control module powers on the external conference device and the LED display screen corresponding to the LED serial port based on the power-on signal. Specific embodiment 1

[0031] Please refer to Figure 2 , Figure 2The first specific embodiment of the interactive control circuit of the LED display screen in the utility model, the interactive control circuit of the LED display screen also includes:

[0032] Audio output interface (3.5mm out), signal conversion module (Switch GSV2007), signal conversion module (Switch GSV2007) is connected to MCU controller (MCU STM32F103), signal conversion module (Switch GSV2007) is connected to 2 HDMI input interfaces (HDMI2.0 IN), audio output interface is connected to MCU controller;

[0033] The external conference equipment transmits the HDMI audio signal to an HDMI input interface (HDMI2.0 IN), and the HDMI input interface (HDMI2.0 IN) transmits the HDMI audio signal to the signal conversion module (Switch GSV2007). The signal conversion module (Switch GSV2007) and the MCU controller (MCU STM32F103) perform signal control configuration to convert the HDMI audio signal into a universal audio signal and transmit it to the audio output interface (3.5mm out).

[0034] It should be noted that the audio output interface includes a 3.5mm audio interface for connecting external audio devices, such as speakers or headphones, to provide clearer sound effects. This interface has a wide range of uses and can meet the audio output needs of different users, such as playing audio files or video presentations in meetings, or enhancing the audience experience with sound effects in presentations.

[0035] It should be noted that the signal conversion module includes: GSV2007 chip, which is a chip for integrated circuits, usually used in the fields of audio and video processing and communication. The chip has the characteristics of high performance and low power consumption, and is suitable for a variety of application scenarios, including LED display screen conference all-in-one machine. The GSV2007 chip integrates audio and video encoding and decoding functions, image processing functions and network communication functions, and can achieve high-definition video playback, audio processing and data transmission. At the same time, the chip also supports a variety of audio and video interfaces and communication protocols, such as HDMI, VGA, USB, Ethernet, etc., which can meet the LED display screen conference all-in-one machine for diversified connection and communication needs. Due to its high performance and low power consumption, the GSV2007 chip can improve the overall performance of the LED display screen conference all-in-one machine, extend the use time of the equipment, and provide users with a better conference and display experience.

[0036] It should be noted that the MCU controller includes the STM32F103 chip. The STM32F103 is a 32-bit ARM Cortex-M3 core microcontroller chip launched by STMicroelectronics. It is widely used in various embedded systems, including LED display all-in-one conference machines.

[0037] The STM32F103 chip has rich peripherals and functions, including multiple general-purpose timers, serial communication interfaces (USART, SPI, I2C), analog-to-digital converters (ADC), PWM outputs, Ethernet interfaces, etc., which can meet the needs of LED display all-in-one conference machines for various peripherals and functions.

[0038] The STM32F103 chip has low power consumption, high performance and rich software support, which can provide stable and reliable system performance and support rapid development and customization. Through the STM32F103 chip, the LED display conference all-in-one machine can achieve efficient image processing, smooth video playback and stable communication connection, providing users with high-quality conference and display experience.

[0039] It should be noted that the LED serial port includes: 4PIN screen control serial port, which is used to control the serial communication interface of the LED display. This serial port is generally a simplified communication interface used to send control commands and data to control the display content and operation of the LED display.

[0040] It should be noted that the relay control module includes: an 8-channel relay controller. The 8-channel controlled relay controller is a device used to control the switching status of multiple relays. It is usually used in industrial control, automation systems, smart homes and other fields. It can control multiple channels (usually 8 channels) at the same time, and each channel can control a relay.

[0041] Specifically, the interactive control circuit of the LED display screen also includes: an HDMI output interface (HDMI2.0OUT), the HDMI output interface (HDMI2.0 OUT) is connected to the MCU controller (MCU STM32F103) and the signal conversion module (Switch GSV2007), and the MCU controller (MCU STM32F103) converts the CEC control signal (CEC1, CEC2) into a modulated CEC control signal (CEC) and transmits it to the HDMI output interface.

[0042] Signal transmission method: N HDMI input interfaces include: a first HDMI input interface (HDMI2.0IN) and a second HDMI input interface (HDMI2.0 IN). The first HDMI input interface (HDMI2.0IN) transmits a first CEC control signal (CEC1) to the MCU controller (MCU STM32F103). The second HDMI input interface (HDMI2.0 IN) transmits a second CEC control signal (CEC2) to the MCU controller. The MCU controller (MCU STM32F103) converts the first CEC control signal (CEC1) and the second CEC control signal (CEC2) into display control signals and transmits them to the LED serial port.

[0043] Beneficial effects: 2 or more HDMI 2.0 input interfaces are connected to the Switch chip. After the MCU signal control configuration is processed, the Switch chip outputs one HDMI2.0 OUT and one 3.5mm audio interface. The CEC of 2 or more HDMI2.0 input signals are connected to the MCU respectively, analyzed and processed by software, and then one signal is output to the CEC pin of HDMI2.0 output. The board MCU leads to 8 controllable relay interfaces, which are used to control the external conference box and screen power supply for time-sharing power-on. After the screen is dormant, the overall power consumption can be reduced to less than 0.5W, and it can be awakened with one button. The screen can be controlled by CEC signals, and CEC signals of multiple HDMI interfaces can be processed simultaneously. In the scenario of using a third-party conference box, the cost of the conference screen is reduced. This solution can process CEC signals of multiple HDMI interfaces at the same time, making signal control smoother. Specific embodiment 2

[0045] Please refer to Figure 3 , Figure 3 The second specific embodiment of the interactive control circuit of the LED display screen in the utility model.

[0046] In the second specific embodiment, the signal transmission method is: N HDMI input interfaces include: a first HDMI input interface (HDMI2.0 IN), a second HDMI input interface (HDMI2.0 IN), the first HDMI input interface (HDMI2.0 IN) transmits a first CEC control signal (CEC1) to the second HDMI input interface (HDMI2.0 IN), and the second HDMI input interface (HDMI2.0 IN) transmits the first CEC control signal (CEC1) and the second CEC control signal (CEC2) to the MCU controller (MCU STM32F103).

[0047] Beneficial effects: Solved the CEC processing problem of HDMI input interface, reduced signal connection lines, and added relay modules to achieve low-power management function of the screen. The screen can be controlled through the CEC signal of the HDMI interface. In the scenario of using a third-party conference box, the cost of the conference screen is reduced, and the power consumption of the screen after sleep can be reduced to less than 0.5W.

[0048] In addition, although each operation is described in a specific order, this should be understood as requiring such operation to be performed in the specific order shown or in a sequential order, or requiring that all illustrated operations should be performed to obtain desired results. Under certain circumstances, multitasking and parallel processing may be advantageous. Similarly, although some specific implementation details are included in the above discussion, these should not be interpreted as limiting the scope of the present disclosure. Some features described in the context of a separate embodiment can also be implemented in a single implementation in combination. On the contrary, the various features described in the context of a single implementation can also be implemented in multiple implementations individually or in any suitable sub-combination mode.

[0049] Although the subject matter has been described in language specific to structural features and / or methodological logical actions, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. On the contrary, the specific features and actions described above are merely example forms of implementing the claims.

Claims

1. An interactive control circuit for an LED display screen, characterized in that: include: N HDMI input interfaces, MCU controller, LED serial port, relay control module, where N is a positive integer not less than 2; The N HDMI input interfaces are connected to the MCU controller, the MCU controller is connected to the LED serial port, and the MCU controller is connected to the relay control module; The N HDMI input interfaces are used to connect external conference equipment, the external conference equipment transmits CEC control signals to the N HDMI input interfaces, the N HDMI input interfaces transmit the CEC control signals to the MCU controller, the MCU controller converts the CEC control signals into display control signals and transmits them to the LED serial port, the MCU controller converts the CEC control signals into power-on signals and transmits them to the relay control module, and the relay control module powers on the external conference equipment and the LED display screen corresponding to the LED serial port based on the power-on signals.

2. The interactive control circuit of the LED display screen according to claim 1, characterized in that: Also includes: An audio output interface and a signal conversion module, wherein the signal conversion module is connected to the MCU controller, the signal conversion module is connected to the N HDMI input interfaces, and the audio output interface is connected to the MCU controller; The external conferencing device transmits the HDMI audio signal to the N HDMI input interfaces, and the N HDMI input interfaces transmit the HDMI audio signal to the signal conversion module. The signal conversion module and the MCU controller perform signal control configuration to convert the HDMI audio signal into a universal audio signal and transmit it to the audio output interface.

3. The interactive control circuit of the LED display screen according to claim 2, characterized in that: Also includes: An HDMI output interface, wherein the HDMI output interface is connected to the MCU controller and the signal conversion module, and the MCU controller converts the CEC control signal into a modulated CEC control signal and transmits it to the HDMI output interface.

4. The interactive control circuit of the LED display screen according to claim 2 or 3, characterized in that: The audio output interface includes: a 3.5mm audio interface.

5. The interactive control circuit of the LED display screen according to claim 2 or 3, characterized in that: The signal conversion module includes: a GSV2007 chip.

6. The interactive control circuit of the LED display screen according to claim 1, characterized in that: The N HDMI input interfaces include: a first HDMI input interface and a second HDMI input interface, the first HDMI input interface transmits a first CEC control signal to the MCU controller, the second HDMI input interface transmits a second CEC control signal to the MCU controller, and the MCU controller converts the first CEC control signal and the second CEC control signal into a display control signal and transmits it to the LED serial port.

7. The interactive control circuit of the LED display screen according to claim 1, characterized in that: The N HDMI input interfaces include: a first HDMI input interface and a second HDMI input interface, the first HDMI input interface transmits a first CEC control signal to the second HDMI input interface, and the second HDMI input interface transmits the first CEC control signal and the second CEC control signal to the MCU controller.

8. The interactive control circuit of the LED display screen according to claim 1, characterized in that: The MCU controller includes an STM32F103 chip.

9. The interactive control circuit of the LED display screen according to claim 1, characterized in that: The LED serial port includes: a 4PIN screen control serial port.

10. The interactive control circuit of the LED display screen according to claim 1, characterized in that: The relay control module includes: an 8-channel relay controller.

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