CN222337891U

CN222337891U - Interactive control circuit of LED display screen

Info

Publication number: CN222337891U
Application number: CN202421131614.9U
Authority: CN
Inventors: 许锋; 徐梦梦; 石昌金; 丁崇彬
Original assignee: Shenzhen Absen Optoelectronic Co Ltd; Huizhou Absen Optoelectronic Co Ltd
Current assignee: Shenzhen Absen Optoelectronic Co Ltd; Huizhou Absen Optoelectronic Co Ltd
Priority date: 2024-05-22
Filing date: 2024-05-22
Publication date: 2025-01-10
Anticipated expiration: 2034-05-22

Abstract

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

Description

Interactive control circuit of LED display screen

Technical Field

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

Background

The LED display screen conference integrated machine is used as core equipment for modern conferences and displays, and the functional and performance requirements of the LED display screen conference integrated machine are increasingly complex. In 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 intelligent devices, to meet the diversified demands in different scenes. To achieve this connection, LED display conferencing integrated machines must support a variety of communication protocols and interfaces to ensure compatibility with a variety of devices.

The LED display screen conference all-in-one machine needs to be high in performance, energy-saving and environment-friendly. By adopting the intelligent dimming technology and dynamic power consumption management, the brightness and the power consumption of the display screen can be dynamically adjusted according to the environment brightness and the service condition, so that the energy consumption is reduced to the greatest extent and the service life of equipment is prolonged. Meanwhile, the built-in intelligent system can optimize the energy utilization efficiency of the equipment, and further improve the overall energy-saving performance.

However, when the LED display screen conference integrated machine is connected to the third party conference box, the LED display screen has problems of board card redundancy, display delay and the like, so a technology is required to solve the current problems.

Disclosure of utility model

The utility model mainly aims to solve the technical problem that when the LED display screen conference integrated machine is connected with a third party conference box, the LED display screen has board card redundancy and display delay.

The first aspect of the present utility model provides an interaction control circuit of an LED display screen, the interaction control circuit of the LED display screen comprising:

N HDMI input interfaces, an MCU controller, an LED serial port and a relay control module, wherein N is a positive integer not less than 2;

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 connecting 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 ports, the MCU controller converts the CEC control signals into power-on signals and transmits the power-on signals to the relay control module, and the relay control module powers on LED display screens corresponding to the external conference equipment and the LED serial ports based on the power-on signals.

Optionally, in a first implementation manner of the first aspect of the present utility model, the device further includes an audio output interface and a signal conversion module, wherein the signal conversion module is connected with the MCU controller, the signal conversion module is connected with the N HDMI input interfaces, and the audio output interface is connected with the MCU controller;

The external conference device transmits HDMI audio signals to the N HDMI input interfaces, the N HDMI input interfaces transmit the HDMI audio signals to the signal conversion module, and the signal conversion module and the MCU controller perform signal control configuration to convert the HDMI audio signals into universal audio signals and transmit the universal audio signals to the audio output interfaces.

Optionally, in a second implementation manner of the first aspect of the present utility model, the device further includes an HDMI output interface, where 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 the modulated CEC control signal to the HDMI output interface.

Optionally, in a third implementation form of the first aspect of the utility model, the audio output interface comprises a 3.5mm audio interface.

Optionally, in a fourth implementation manner of the first aspect of the present utility model, the signal conversion module includes a GSV2007 chip.

Optionally, in a fifth implementation manner of the first aspect of the present utility model, the N HDMI input interfaces include a first HDMI input interface and a second HDMI input interface, where 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 the display control signal to the LED serial port.

Optionally, in a sixth implementation manner of the first aspect of the present utility model, the N HDMI input interfaces include a first HDMI input interface and a second HDMI input interface, where 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 a second CEC control signal to the MCU controller.

Optionally, in a seventh implementation manner of the first aspect of the present utility model, the MCU controller includes an STM32F103 chip.

Optionally, in an eighth implementation manner of the first aspect of the present utility model, the LED serial port includes a 4PIN screen serial port.

Optionally, in a ninth implementation manner of the first aspect of the present utility model, the relay control module includes an 8-channel relay controller.

In the embodiment of the utility model, the MCU controller is used for replacing the conference board card with the SOC as the main control, and the use cost is greatly reduced and the problem of board card redundancy is solved under the scene of introducing a third party conference box. And the MCU controller is utilized to simultaneously process CEC signals of the multipath HDMI interfaces, so that signal control is smoother, the problem of display delay of the LED display screen is solved, the smooth connection between the LED display screen and a third party conference box is realized, and more efficient, convenient and comfortable conference experience is achieved.

Drawings

FIG. 1 is a diagram of an overall architecture of an interactive control circuit for an LED display screen in an embodiment of the utility model;

FIG. 2 is a schematic diagram of a first embodiment of an interactive control circuit for an LED display screen according to the present utility model;

Fig. 3 is a second embodiment of the interactive control circuit of the LED display screen of the present utility model.

Detailed Description

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

Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the present disclosure has been illustrated in the drawings in some form, it is to be understood that the present disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and examples of the present disclosure are for illustrative purposes only and are not intended to limit the scope of the present disclosure.

In describing embodiments of the present disclosure, the term "comprising" and its like should be taken to be open-ended, i.e., 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," and the like, may refer to different or the same object. Other explicit and implicit definitions are also possible below.

For convenience of understanding, a specific flow of an embodiment of the present utility model is described below, referring to fig. 1, where an overall architecture diagram of an interaction control circuit of an LED display screen in an embodiment of the present utility model includes:

2 HDMI input interfaces, an MCU controller, an LED serial port and a relay control module;

the 2 HDMI input interfaces are connected with the MCU controller, the MCU controller is connected with the LED serial port, the MCU controller is connected with the relay control module, the 2 HDMI input interfaces are used for being connected with external conference equipment (conference box), in FIG. 1, one HDMI input interface is connected with the HDMI interface of the external conference equipment, CEC control signals are transmitted to the HDMI input interface through the HDMI interface, CEC control signals are transmitted to the HDMI input interface through the HDMI input interface, CEC control signals are transmitted to the MCU controller through the HDMI input interface, the MCU controller converts the CEC control signals into display control signals to be transmitted to the LED serial port, and the LED serial port controls display of an external LED display screen. And converting the CEC control signal into a power-on signal in the MCU controller, transmitting the power-on signal to the relay control module, and powering on the LED display screen corresponding to the external conference equipment and the LED serial port by the relay control module based on the power-on signal.

Detailed description of the preferred embodiments

Referring to fig. 2, in a first embodiment of the interaction control circuit of the LED display screen of the present utility model shown in fig. 2, the interaction control circuit of the LED display screen further includes:

An audio output interface (3.5 mm out), a signal conversion module (SWITCH GSV 2007), wherein the signal conversion module (SWITCH GSV 2007) is connected with an MCU controller (MCU STM32F 103), the signal conversion module (SWITCH GSV 2007) is connected with 2 HDMI input interfaces (HDMI 2.0 IN), and the audio output interface is connected with the MCU controller;

The external conference device transmits the HDMI audio signal to 1 HDMI input interface (HDMI 2.0 IN), the HDMI input interface (HDMI 2.0 IN) transmits the HDMI audio signal to the signal conversion module (SWITCH GSV 2007), and the signal conversion module (SWITCH GSV 2007) and the MCU controller (MCU STM32F 103) perform signal control configuration to convert the HDMI audio signal into a universal audio signal and transmit the universal audio signal to the audio output interface (3.5 mm out).

It should be noted that the audio output interface includes a 3.5mm audio interface for connecting to an external audio device, such as a speaker or earphone, to provide a clearer sound effect. The interface has wide application range, and can meet the audio output requirements of different users, such as playing audio files or video presentations in a conference or enhancing audience experience in combination with sound effects in the presentation.

It should be noted that the signal conversion module includes a GSV2007 chip, which is a chip for an integrated circuit and is generally used in the fields of audio/video processing and communication. The chip has the characteristics of high performance and low power consumption, and is suitable for various application scenes, including the LED display screen conference all-in-one machine. The GSV2007 chip integrates audio/video encoding/decoding function, image processing function and network communication function, and can realize high definition video playing, audio processing and data transmission. Meanwhile, the chip also supports various audio and video interfaces and communication protocols, such as HDMI, VGA, USB, ethernet and the like, and can meet the requirements of the LED display screen conference all-in-one machine on diversified connection and communication. Due to the characteristics of high performance and low power consumption, the GSV2007 chip can improve the overall performance of the LED display screen conference integrated machine, prolong the service time of equipment and provide better conference and display experience for users.

It should be noted that, the MCU controller includes STM32F103 chip, STM32F103 is a microcontroller chip of 32 bit ARM Cortex-M3 kernel that the meaning semiconductor promotes, is widely used in various embedded systems, including LED display screen meeting all-in-one.

The STM32F103 chip has rich peripheral equipment and functions, comprises a plurality of universal timers, serial communication interfaces (USART, SPI, I C), analog-digital converters (ADC), PWM output, ethernet interfaces and the like, and can meet the requirements of the LED display screen conference all-in-one machine on various peripheral equipment and functions.

STM32F103 chip has low power consumption, high performance and rich software support, can provide stable and reliable system performance, and supports rapid development and customization. Through STM32F103 chip, LED display screen meeting all-in-one can realize efficient image processing, smooth video broadcast and stable communication connection, provides high-quality meeting and show experience for the user.

The LED serial port comprises a 4PIN control screen serial port, wherein the 4PIN control screen serial port is used for controlling a serial communication interface of the LED display screen. Such serial ports are typically a simplified communication interface for transmitting control commands and data to control the display content and operation of the LED display screen.

It should be noted that the relay control module includes an 8-channel relay controller, where the 8-channel relay controller is a device for controlling the on-off states of a plurality of relays, and is generally used in fields of industrial control, an automation system, smart home, etc., and can simultaneously control a plurality of channels (typically 8 channels), and each channel can control one relay.

Specifically, the interactive control circuit of the LED display screen further comprises an HDMI output interface (HDMI2.0OUT), wherein the HDMI output interface (HDMI 2.0 OUT) is connected with an MCU controller (MCU STM32F 103) and a signal conversion module (SWITCH GSV 2007), and the MCU controller (MCU STM32F 103) converts CEC control signals (CEC 1 and CEC 2) into modulated CEC control signals (CEC) and transmits the modulated CEC control signals (CEC) to the HDMI output interface.

The signal transmission mode includes that the N HDMI input interfaces comprise a first HDMI input interface (HDMI2.0IN) and a second HDMI input interface (HDMI 2.0 IN), the first HDMI input interface (HDMI2.0IN) transmits a first CEC control signal (CEC 1) to the MCU controller (MCU STM32F 103), the second HDMI input interface (HDMI 2.0 IN) transmits a second CEC control signal (CEC 2) to the MCU controller, and the MCU controller (MCU STM32F 103) converts the first CEC control signal (CEC 1) and the second CEC control signal (CEC 2) into display control signals to be transmitted to the LED serial port.

The method has the beneficial effects that 2 paths of HDMI2.0 input interfaces and more are connected to the Switch chip, and after MCU signal control configuration processing, the Switch chip outputs one path of HDMI2.0 OUT and one path of 3.5mm audio interface. CEC of 2 routes and above HDMI2.0 input signals are respectively connected to MCU, software analysis processing is carried out, and then one route of signals are output and connected to CEC pins of HDMI2.0 output. The board card MCU is used for leading out 8 paths of controllable relay interfaces and controlling an external conference box and a screen power supply to be electrified in a time-sharing mode. After the screen body is dormant, the whole power consumption can be reduced to below 0.5W, and meanwhile, the screen body can be awakened by one key. The screen can be controlled through the CEC signal, and the CEC signals of the multipath HDMI interfaces can be processed simultaneously, so that the cost of the conference screen is reduced under the scene of using the third party conference box. The scheme can process CEC signals of multiple HDMI interfaces at the same time, so that signal control is smoother.

Second embodiment

Referring to fig. 3, fig. 3 is a schematic diagram showing a second embodiment of the interactive control circuit of the LED display screen according to the present utility model.

IN a second embodiment, the signal transmission manner is that the N HDMI input interfaces comprise a first HDMI input interface (HDMI 2.0 IN) and a second HDMI input interface (HDMI 2.0 IN), the first HDMI input interface (HDMI 2.0 IN) transmits a first CEC control signal (CEC 1) to the second HDMI input interface (HDMI 2.0 IN), and the second HDMI input interface (HDMI 2.0 IN) combines and transmits the first CEC control signal (CEC 1) and the second CEC control signal (CEC 2) to the MCU controller (MCU STM32F 103).

The method has the beneficial effects that the CEC processing problem of the HDMI input interface is solved, the signal connecting wires are reduced, and the relay module is added to realize the low-power consumption management function of the screen body. The screen can be controlled through CEC signals of the HDMI interface, the cost of the conference screen is reduced in the scene of using a third party conference box, and the power consumption of the dormant screen body can be reduced to below 0.5W.

Moreover, although operations are depicted in a particular order, this should be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of the present disclosure. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single implementation. Conversely, various features that are described in the context of a single implementation can also be implemented in multiple implementations separately or in any suitable subcombination.

Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are example forms of implementing the claims.

Claims

1. An interactive control circuit for an LED display screen, comprising:

2. The interactive control circuit of the LED display screen according to claim 1, further comprising an audio output interface and a signal conversion module, wherein the signal conversion module is connected with the MCU controller, the signal conversion module is connected with the N HDMI input interfaces, and the audio output interface is connected with the MCU controller;

3. The interactive control circuit of the LED display screen according to claim 2, further comprising an HDMI output interface, wherein the HDMI output interface is connected with 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 the modulated CEC control signal to the HDMI output interface.

4. The interactive control circuit of an LED display screen of claim 2 or 3 wherein the audio output interface comprises a 3.5mm audio interface.

5. The interactive control circuit of an LED display screen according to claim 2 or 3, wherein the signal conversion module comprises a GSV2007 chip.

6. The interactive control circuit of the LED display screen according to claim 1, wherein the N HDMI input interfaces comprise 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 the display control signals to the LED serial port.

7. The interactive control circuit of the LED display screen according to claim 1, wherein the N HDMI input interfaces comprise 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 a second CEC control signal to the MCU controller.

8. The interactive control circuit of an LED display of claim 1, wherein the MCU controller comprises an STM32F103 chip.

9. The interactive control circuit of an LED display screen according to claim 1, wherein the LED serial port comprises a 4PIN control screen serial port.

10. The interactive control circuit of an LED display screen according to claim 1, wherein the relay control module comprises an 8-channel relay controller.