WO2020029437A1 - Projector based on lighting control data transmission protocol and control system thereof - Google Patents

Abstract

Disclosed is a projector based on a lighting control data transmission protocol, the lighting control data transmission protocol being DMX512, or RDM, or ArtNet. The projector comprises an optical assembly, a projector driving board, and a serial control circuit board. The serial control circuit board comprises a first serial interface, a serial control processing module, and a second serial interface. By means of first serial data communication connection, the serial control processing module can obtain a control signal sent by a lighting control console, perform logical operation processing on the control signal so that the control signal is processed into a signal format that can be directly applied by the projector driving board, and send the processed control signal to the projector driving board by means of the second serial interface, so as to control the optical assembly to respond to the control signal. The present invention yields the technical effect of adding a lighting control signal interface for an existing projector, without changing the original structure of the projector.

Description

Projector based on light control data transmission protocol and its control system Technical field

The invention relates to the technical field of electric light source control (H05B / 35/00), which uses different types of light emission in combination with each other, and particularly relates to a projector based on a light control data transmission protocol and a control system thereof.

Background technique

At present, projection applications are widely used in homes, businesses, industries, factories, cinemas, etc. However, the current projection equipment only has analog input interface and digital input interface. Its basic circuit structure is image control circuit and projection equipment. The input analog signals and digital signals are processed by the image control circuit and output to the projection equipment. The projection equipment will It is projected on the screen or background wall, and its function is relatively simple.

Current projectors are widely used in homes, offices, schools, and entertainment venues. They use the HMDI control method to project documents, pictures or videos, but they cannot parallel multiple projectors at the same time as professional stage / landscape lamps. Single controllable or multiple controllable at the same time; the current professional luminaire adopts the control method of DMX512, which illuminates the target object by projecting a light spot to produce a pattern and colored light spot effect, which can simultaneously control multiple professional stages / landscapes After the luminaires are connected in parallel, they can be controlled by a single unit or multiple units at the same time, so as to project the special effects required in the field of professional stage / landscape lighting. However, professional luminaires currently do not have the function of playing pictures, dynamic projection or video.

DMX is the abbreviation of Digital Multiplex. The Chinese translation is called "Digital Multiplexing Protocol". At present, it has been recognized and complied with by manufacturers of stage lighting equipment in various countries around the world, as a widely used digital light control data transmission protocol. In other words, as long as each controlled lighting unit meets the requirements of this agreement, digital lighting control can be realized.

DMX512-A lighting control data transmission protocol is the cultural industry standard of the People's Republic of China. The standard number is WH / T 32-2008, which is equivalent to the asynchronous string controlled by the US national standard E1.11-2004 "USITT DMX512-A lights and auxiliary equipment. "Digital Data Transmission Standard for Data", English name: American National Standard E1.11-2004 Entertainment Technology-USITT DMX512-A Asynchronous Serial Digital Data Transmission Standard Standard for Controlling Lighting Equipment and Accessories.

The control signals of DMX-512 or DMX-512A are in units of "frames". Each frame of data can drive up to 512 lighting circuits. It is also called 512 DMX channels in the industry. The effective DMX value of each DMX channel is between 0-255. This feature of DMX allows people to achieve linear dimming of the lighting circuit by adjusting the DMX dimming value. For example, LED lighting equipment is now more and more commonly used. The DMX controller is a device that sends DMX control signals to the controlled lighting equipment continuously. Therefore, the stage lighting controller can pre-design and edit the lighting control program of each performance scene for a certain performance, that is, the DMX control signals of sections, and then store them in each DMX controller; after the performance starts, just start the corresponding The DMX controller and lighting equipment of each performance scene will be performed on the stage according to the pre-design, and the operation is simple and convenient. This method of controlling the lighting of the performance scene using the DMX protocol has become more and more popular.

RDM is an extended version of the DMX512-A protocol, allowing dimmers and other control equipment to discover through a DMX512 network, and then configure, condition monitor and manage intermediate and line-end equipment.

It allows two-way communication between a lighting device or system controller and a connected RDM-compatible device via a standard DMX line. This protocol will allow configuration, condition monitoring, and management of standard DMX512 devices that do not interfere with the normal operation of those devices that do not recognize the RDM protocol.

Allow a controller or test device to intelligently discover other devices that can be RDM (Remote Device Management), such as scanners or dimming cabinets, and manage them remotely through this connection. Including the ability to remotely set the initial address of the DMX512, to query the error or statistical information of the device, and to achieve most of the configuration settings that are usually done on the front panel of the device. RDM can run on the same data link with new RDM equipment or any existing DMX512 products without any performance impact. Since RDM runs on the first pair of DMX512 links, the only infrastructure upgrade required by RDM is to upgrade the existing data distributor to implement a bidirectional mode to support RDM.

Art-Net is an Ethernet protocol based on the TCP / IP protocol stack. The goal is to use standard network technology to allow the transfer of large amounts of DMX512 data over a wide area. The latest version of the protocol implements many new functions and simplifies the data transmission mechanism. These changes are based on feedback from manufacturers using this protocol.

Serial interface, COM port, UART port, TTL, RS-232, RS-485 difference

1. Serial interface and COM port refer to the physical interface form (hardware). And TTL, RS-232, RS-485 refers to the level standard (electrical signal).

2. When connecting equipment, generally only connect GND and RX. Will not be connected to Vcc or + 3.3v power lines, to avoid conflicts with the power supply on the target device.

3, PL2303, CP2102 chip is a USB to TTL serial interface chip, use USB to extend the serial interface (TTL level).

4. The MAX232 chip is a dedicated bidirectional conversion chip for TTL level and RS232 level, which can be TTL to RS-232 or RS-232 to TTL.

5, TTL standard is low level is 0, high level is 1 (+ 5V level). The RS-232 standard has a positive level of 0 and a negative level of 1 (± 15V level).

6. RS-485 is similar to RS-232, but uses differential signal negative logic. Skip it here.

Serial interface, COM port, UART port:

The COM port is a serial communication port, referred to as a serial interface. This is different from the "Universal Serial Bus" of USB and the "SATA" of hard disk.

Generally we see two physical standards. D-type 9-pin plug, and 4-pin DuPont header.

This is a common 4-pin serial interface, which is common on circuit boards, and often has a DuPont pin on it. There are also times when there is a fifth pin with a 3.3V power supply.

Because it is reserved on the circuit board, there can be many kinds of protocols, depending on the specific equipment.

Embedded serial interface generally refers to the UART port, but we often do not understand the difference between it and the COM port, and the relationship between RS232, TTL, etc. In fact, UART, COM refers to the physical interface form (hardware), TTL, RS-232 refers to the level standard (electrical signal).

The UART has 4 pins (VCC, GND, RX, TX). The TTL level used is 0 (0V) at low level and 1 (3.3V or above) at high level.

The D-type 9-pin serial interface can be seen behind the desktop computer.

There are only two protocols for this interface: RS-232 and RS-485. It will not be TTL level (except for special applications).

The definition of 9-pin serial interface can refer to here: http://wenku.baidu.com/view/5c170c6925c52cc58bd6be6e.html.

Generally only connect two pins of RXD and TXD, plus GND.

Based on the above-mentioned prior art and the basic technical design ideas of the present invention, the following patent documents are listed as background technologies.

Patent document CN202282894U discloses a DMX controlled full-color LED flood light, including a flood light body, a microprocessor for controlling decoding, and a high-power red-green-blue LED integrated light source, and a DC boost Constant current power circuit, a wireless control signal receiving circuit and a DMX signal transmitting and receiving circuit. The DC boost constant current power supply circuit, the wireless control signal receiving circuit and the DMX signal sending and receiving circuit are connected to the microprocessor. The microprocessor decodes the externally input DMX signal and outputs three PWM signals to control the DC boost constant current power supply circuit, so as to realize full-color control of high-power red, green and blue LED integrated light sources. The light control operator of the utility model can use any DMX console that complies with the DMX512 / 1990 protocol to control the full-color LED flood light. At the same time, the operator can also use a remote control to send a wireless control signal to remotely control the full-color LED flood light. The patent CN202282894U only discloses the use of DMX512 protocol to control LED flood lights, and LED flood lights are not equivalent to projectors.

Patent document CN102231796A discloses a technology for controlling a camera by using a device and a system of the DMX protocol, specifically a device and a system of controlling a camera based on the DMX protocol. The present invention includes a DMX camera controller and a DMX camera; the DMX camera control The device circuit of the controller includes a main control system, a video signal input module, a video signal processing module, and a video signal recording module (recording storage and playback equipment); the device circuit of the DMX camera includes a control motherboard, a moving head device, auxiliary lighting, Camera module. The device of the present invention supports the DMX protocol and can be controlled by using the DMX signal, so that the photographing device and the digital lighting device can work together under the control of the DMX signal. The patent CN102231796A discloses the use of the DMX protocol to control cameras. Obviously, cameras are not equivalent to projectors.

Patent document CN105263232A discloses an RS485 communication circuit and a DMX controller and control system. The RS485 communication circuit includes an RS485 communication chip, wherein: 8 pins are connected to a power source, and the power pin is connected to a decoupling capacitor C1, 5 pins are grounded; 2 pins are Receive output enable pin, pin 3 is the transmit input enable pin, pin 2 and pin 3 are connected to the resistor R1 at the same time to achieve a high level of data transfer. The pin 1 is the data receive output pin and pin 4 is the data send. Input pins, pins 1 and 4 are connected to the RX pin and TX pin of the UART interface of the microcontroller, and the pull-up resistor R2 of pin 4 is connected to a high level, so that the DI of the RS485 communication chip is in an idle state, ensuring that pin 4 can send data. At the same time, pin 1 can receive data; pins 6 and 7 are signal input / output lines. The invention can realize automatic switching of data transmission direction, and has the characteristics of low power consumption, fast response, zero delay and complete protection. The patent CN105263232A discloses the technical problem of mutual communication between the RS485 serial communication standard and the DMX serial communication protocol. Of course, based on the development of technology, designing a complex conversion circuit is not in line with economic costs and reliability is not guaranteed. According to the current technological development, it is more economical and reliable to implement data conversion between different communication protocols based on the control chip.

Patent document CN1959520 discloses a projector with a function of an illumination connection interface, which includes a housing, a projection module installed in the housing, a connection interface provided on the housing for connecting external devices, a A lighting device is installed on the casing, and a lighting switch is disposed on the casing, and is used for turning on the lighting device to illuminate the connection interface. Although the patent CN1959520 combines light with a projector, it does not disclose the technical content of using a light control protocol to control the projector.

Patent document CN102523409A discloses a device and system for controlling a puzzle of a projector by DMX protocol, including DMX signal receiving and processing circuit, MCU microprocessor circuit, image processing module, projection module equipment, motor driving circuit, DMX signal input interface, storage Equipment, video input interface, characterized in that the DMX signal receiving and processing circuit includes a DMX signal input interface, and the MCU microprocessor circuit includes a connection with the image processing module, the projection module device and the motor driving circuit, The image processing circuit includes connection with the storage device interface and the video input interface. The image processing circuit includes connection with the projection module device; the system uses a standard DMX interface and is compatible with the DMX interface of the lamp; the DMX signal is used to control the projection The jigsaw of equipment and projection equipment, so that multiple projection equipments can project together and stitch into a larger image, and can work with digital lighting equipment under DMX signal control to achieve integrated performance and control.

Patent document CN101800872A discloses a device and system for controlling a projector based on the DMX protocol, including a DMX signal receiving and processing circuit, an MCU microprocessor circuit, a DSP image processing circuit, a projection module device circuit, a DMX signal input interface, a storage device interface, The video analog input interface and the video digital input interface are characterized in that the DMX signal receiving and processing circuit includes a DMX signal input interface, the MCU microprocessor circuit is connected with the DSP image processing circuit and the projection module equipment circuit, and the DSP image processing The circuit is connected to the storage device interface, and the projection module device circuit is connected to the video analog input interface and the video digital input interface; the described device and system for controlling the projector based on the DMX protocol uses a standard DMX interface and communicates with Lighting DMX interface is compatible.

The patents CN102523409A and CN101800872A disclose the technical content of controlling the projector using the DMX protocol. However, the technical solution of the patent itself has made a major transformation to the projector itself, thereby increasing the manufacturing cost.

The technical solution disclosed in the above patent document does not really propose a projector with a professional light control interface.

Based on the existing technology, designing a projector with a compact structure and complete functions based on the light control data transmission protocol is still a research and development target for those skilled in the art.

Summary of the invention

One of the objectives of the present invention is to propose a projector and its control system based on the light control data transmission protocol, which can combine the functions of professional stage / landscape lamps and projectors, so that this projector not only has projection The function of document, picture or video also has the function of creating gorgeous lighting effects.

Another object of the present invention is to provide a projector based on a light control data transmission protocol, which transmits a control signal based on a light control data transmission protocol sent by a light console to a light of the projector through a specially designed second serial communication protocol. Machine components to control the projector to play multimedia content such as pictures and videos.

The third object of the present invention is to propose a projector based on a light control data transmission protocol, which does not change the structure of the existing projector, and only needs to add a circuit board to the existing projector, and can directly use the light console. Improved control of the projector.

The fourth object of the present invention is to propose a projector control system based on a light control data transmission protocol, which enables the projectors to be connected in parallel like professional stage / landscape lamps, and can control a single projector or control multiple units at the same time after being connected in parallel. Projector to achieve the effect required in the professional stage / landscape lighting field.

To this end, the present invention proposes a projector based on a light control data transmission protocol, wherein the light control data transmission protocol is DMX512, or RDM, or ArtNet, and is characterized in that the projector includes a light machine component and a projector driver Board and serial control circuit board, where

The serial control circuit board includes a first serial interface, a serial control processing module, and a second serial interface;

The serial control processing module is respectively connected to the first serial interface and the second serial interface;

The lighting control console and the first serial interface of the serial control circuit board perform a first serial data communication connection based on the lighting control data transmission protocol;

A second serial interface of the serial control circuit board is connected to the projector driving board through a second serial data communication connection method based on a second serial communication protocol;

The serial control processing module, by means of the first serial data communication connection, can obtain a control signal sent by the lighting console, perform logical operation processing on the control signal, and process the control signal as The signal format that can be directly applied by the projector driving board is sent to the projector driving board through the second serial interface, so as to control the optical-mechanical component to respond to the control signal.

The invention also proposes a projector control system based on a light control data transmission protocol, which is characterized in that: the light console uses a DMX signal to control a plurality of the projectors, so that the plurality of the projectors project together and splice together Larger images without the need for a computer PC or media server for perfect seamless puzzles.

According to other technical solutions of the present invention, it may further include one or more of the following technical features. As long as such a combination of technical features is implementable, the new technical solutions thus formed belong to a part of the present invention.

Compared with the prior art, the beneficial effects of the present invention are:

Achieve direct control of the projector using a lighting console;

Realize the use of light control data transmission protocol to control the projector to play multimedia content such as pictures and videos;

Do not change the structure of the existing projector and add a light control signal interface;

Turn the projector into a projector lamp with rich multimedia playback capabilities;

Realize the parallel control of multiple projectors to achieve the effect required in the professional stage / landscape lighting field.

BRIEF DESCRIPTION OF THE DRAWINGS

With reference to the drawings, the features, advantages, and characteristics of the present invention can be better understood through the following description of specific embodiments, in which:

FIG. 1 is a schematic diagram of a system connection for controlling a projector based on the DMX protocol in the prior art;

2 is a schematic diagram of an embodiment of a projector control system based on a light control data transmission protocol of the present invention;

FIG. 3 is a schematic diagram of the working principle of an embodiment of a projector based on a light control data transmission protocol of the present invention;

4 is a schematic diagram of a working principle of a serial control circuit board of a projector based on a light control data transmission protocol shown in FIG. 3 according to the present invention;

5 is a schematic diagram of a function list of a data transmission protocol of the present invention;

Figure 6: Schematic layout of the functional modules and key components of the serial control circuit board of the projector based on the light control data transmission protocol shown in Figure 3 of the present invention;

7 is a schematic diagram of a microprocessor main control circuit MCU of a serial control processing module of a serial control circuit board of a projector based on a light control data transmission protocol shown in FIG. 3 according to the present invention;

8 is a schematic diagram of a serial control circuit DMX512 & RDM of a serial control processing module of a serial control circuit board of a projector based on a light control data transmission protocol shown in FIG. 3 according to the present invention;

9 is a schematic diagram of a second serial control circuit RS232 of the serial control processing module of the serial control circuit board of the projector based on the light control data transmission protocol shown in FIG. 3 according to the present invention;

FIG. 10: The serial control circuit ArtNet of the serial control processing module of the serial control circuit board of the projector based on the light control data transmission protocol shown in FIG. 3 according to the present invention.

detailed description

In the following, the present invention is further described with reference to the drawings and specific embodiments. It should be noted that the embodiments described below or between technical features can be arbitrarily combined to form new embodiments, provided that the combined technology is There are no logical contradictions or errors in the content.

The design idea of the present invention is as follows:

1.Control method

The projector control system based on the light control data transmission protocol of the present invention includes three parts: a light controller, a projector, and a 485 signal cable or a network cable of the XLR head. The light controller and the projector are connected together through the 485 signal cable or the network cable. A significant feature of the projector control system based on the light control data transmission protocol over ordinary projectors is the built-in serial control circuit board. The first serial interface of this serial control circuit board is connected to the 485 signal line (also Network cable interface), and the second serial interface is connected to the driver board of the projector. This serial control circuit board is equivalent to the main control board of traditional stage / landscape lamps. The lighting console transmits the channel value through DMX512 protocol through the 485 information line, and each channel value has its corresponding control effect. The console transmits professional instructions through the 485 signal line and uses RDM protocol for equipment management. The console can use the ArtNet protocol to implement the functions implemented by the DMX512 and RDM protocols through a network cable.

2.Layout and circuit diagram of the control board

FIG. 6 is a schematic layout diagram of the functional modules and key components of the serial control circuit board of the projector based on the light control data transmission protocol shown in FIG. 3 according to the present invention.

7 is a schematic diagram of a microprocessor main control circuit MCU of a serial control processing module of a serial control circuit board of a projector based on a light control data transmission protocol of the present invention.

8 is a schematic diagram of a serial control circuit DMX512 & RDM of a serial control processing module of a serial control circuit board of a projector based on a light control data transmission protocol of the present invention.

9 is a schematic diagram of a second serial control circuit RS232 of a serial control processing module of a serial control circuit board of a projector based on a light control data transmission protocol of the present invention.

FIG. 10 illustrates a serial control circuit ArtNet of a serial control processing module of a serial control circuit board of a projector based on a light control data transmission protocol of the present invention.

The projector of the present invention supports three light control data transmission protocols of DMX512, RDM, and ArtNet. As can be seen from the layout of the serial control circuit board shown in FIG. 6, functional circuits supporting these three protocols are integrated in the circuit. On the board, through the microprocessor main control circuit MCU, data communication with the second serial control circuit RS232 and further with the second serial interface is realized.

3.Transmission protocol

The data transmission protocol of the projector based on the light control data transmission protocol of the present invention involves two parts, one is a light control console and a serial control circuit board, and the other is a serial control circuit board and a projector drive board. It contains four data transmission protocols: DMX512, RDM, ArtNet and the second serial communication protocol between the control board and the projector. The first three protocols are used for communication between the serial control circuit board and the lighting console, and are all standard protocols for the stage / landscape lighting industry. The second serial communication protocol is a communication protocol between the serial control circuit board and the projector driver board, and its content can become a model in this field and may become a standard in the future.

Based on the above design ideas, the present invention proposes a projector based on a light control data transmission protocol, wherein the light control data transmission protocol is DMX512, or RDM, or ArtNet. The projector includes an optical-mechanical component, a projector driving board, and a serial control circuit board. It can be understood that the light control data transmission protocol is slightly introduced in the background section above. For more information about the DMX data transmission protocol, see the patent documents CN105263232A, CN202282894U, CN102231796A, CN204885690U, CN203734090U, CN203910003U. In fact, the projector in the prior art includes an opto-mechanical component and a projector driving board. The projector of the present invention is based on the projector in the prior art, and a serial control circuit board is added. An interface for receiving a light control signal is added to the projector in the prior art, so that the light console can control the projector.

As shown in FIG. 4, the serial control circuit board includes a first serial interface, a serial control processing module, and a second serial interface. It can be understood that the function of the serial control circuit board is to convert the light control signal into a projection control signal that can be accepted and responded by the projector in the prior art, so as to realize the multimedia content playback function of the projector. The light control signal refers to a data packet or data frame based on a light control data transmission protocol such as DMX512, or RDM, or ArtNet. The projection control signal refers to a data packet or data frame that can be received by the serial interface of the projector and responded by the projector driver board.

It can be understood that in the same technical solution, one of DMX512, RDM, or ArtNet can be implemented separately, any two of the three can be implemented simultaneously, or the three can be implemented simultaneously.

The serial control processing module is connected to the first serial interface and the second serial interface, respectively. It can be understood that for the serial control circuit board to realize the bridge function of control information transmission between the lighting control console and the projector drive board, a data communication interface needs to be connected to the two. Due to the small amount of control information in the lighting console, a serial interface is commonly used for data communication. For this reason, the projectors in the prior art generally also have a serial interface for equipment debugging. Line interface, the light control console can control the projector through the serial control circuit board without changing the physical structure of the projector. What needs to be done is to set up each of the serial control circuit board with the light control console and projection. The serial interface to which the instrument is connected. To this end, the serial control circuit board includes the first serial interface and the second serial interface, and the serial control processing module is to the two serial interfaces. The data information is appropriately converted so that the control signal from the lighting console can be responded by the projector.

The lighting control console and the first serial interface of the serial control circuit board perform a first serial data communication connection based on the lighting control data transmission protocol. It can be understood that, as described below, the first serial interface can be an RS485 interface and / or an RJ45 network interface, wherein the RS485 interface can transmit data frames based on the DMX512 or RDM data transmission protocol, and the RJ45 network interface can transmit based on ArtNet Data frame of a data transmission protocol. The first serial data communication refers to data communication of data frames based on DMX512, RDM, or ArtNet's lighting control data transmission protocol.

The second serial interface of the serial control circuit board is connected to the projector driving board through a second serial data communication connection method based on a second serial communication protocol. It can be understood that, as described below, the second serial interface is, for example, a serial interface based on TTL, RS-232, or RS-485 level standards, depending on which type of serial is implemented by the projector interface. The second serial data communication was developed by the applicant and will be described in detail below. The main point is that the control signal can be appropriately transmitted to the projector and the projector responds to it.

The serial control processing module, by means of the first serial data communication connection, can obtain a control signal sent by the lighting console, perform logical operation processing on the control signal, and process the control signal as The signal format that can be directly applied by the projector driving board is sent to the projector driving board through the second serial interface, so as to control the optical-mechanical component to respond to the control signal. It can be understood that the serial control processing module of the present invention plays a crucial role in the conversion process of the control signal, and it can convert the data frame of the light control signal format into the data frame of the projection control signal format. For example, a light control console sends a "play video" control signal, and the light control data frame format is determined by, for example, the DMX512 data transmission protocol. The serial control processing module parses the light control data frame and extracts the light control data frame. The command field of the control signal is repackaged into a projection data frame and sent to the projector driving board by the second serial interface, and the projector driving board drives the projector to play video content.

The above technical solution of the present invention is different from the projector in the prior art CN101800872A. As shown in FIG. 1, in this prior art, the control board of the projector is directly modified, and a DMX signal receiving processing circuit and an MCU microprocessor circuit are added. .

Therefore, the projector based on the light control data transmission protocol of the present invention has a compact structure and a reasonable cost. Without changing the structure of the existing projector, a light control signal interface is added to the projector, which enriches the data interface of the projector. Use the projector as a projector lamp.

Preferably, the projector further includes a memory, wherein the memory stores rich multimedia content; the lighting console is capable of sending a playback signal, and the serial control circuit board is used to transfer the Rich multimedia content is displayed. It can be understood that the memory is, for example, a non-volatile storage medium such as a CF card, a MicroSD card, an SD card, a solid state hard disk, and a mechanical hard disk.

The lighting console, called the lighting console in its entirety, is a computer control device or manual control device with functions such as editing, recording, and controlling the light brightness and various effects. Usually can be divided into digital and analog dimmers.

At present, the world's major manufacturers of lighting consoles are: Avolites in the United Kingdom; MA Lighting in Germany; High End System flying pig consoles in the United States; and Compulite in Israel. From a global perspective, the lighting control brand with the highest historical usage rate and the largest coverage rate is the British Avolites. Its Pearl series consoles became a required course for domestic lighting engineers. The MA series lighting console produced by German MA Lighting company is popular in large-scale performance market due to its network advantage.

For more information about the lighting control console, please refer to the patent documents CN102681593B, CN102979812B, CN106900106B, CN102541152B, CN102541077A, CN206944097U, CN205402617U, CN206946321U, CN206944095U, CN203297896U, CN206944094U, CN207251978U, CN202453680U, CN202659716U, CN, 20694659716U, CN The related technical content of the patent document becomes a part of the present specification as the prior art, and is not repeated here.

A projector with a memory facilitates efficient playback of rich multimedia content.

Preferably, the serial control circuit board further includes a first power interface for providing working power to the serial control circuit board through the projector driving board, wherein the first power interface and the projection The second power interface of the instrument driver board is connected. It can be understood that by obtaining power from the components of the existing projector, the complexity of the system can be reduced and the production cost can be reduced.

Preferably, the frame format of the second serial communication protocol includes: a frame header, a version, a frame length, a command code, data, and a check code.

Preferably, the second serial interface is set as follows:

Table 1: Example of setting the second serial interface parameter

Baud rate	Start bit	Data bit	Stop bit	Parity
115200	1	8	1	no

An example of the frame format of the second serial communication protocol is as follows:

Table 2: Example of the frame format of the second serial communication protocol

Among them, the frame header is a fixed two bytes, which is the ASCII code of the letter "pr";

Version indicates the communication protocol version. The device supports only one version, unless the device's own program is upgraded;

Frame length calculation includes frame header and check code;

The command code lists its function and data format below;

The data area may be one byte or multiple bytes, corresponding to the command code function;

The check code is the sum check of all the bytes except for itself;

The command codes and data formats of the second serial communication protocol are listed in the following table:

Table 3: Examples of command codes and data formats of the second serial communication protocol

The first serial interface uses the international standard communication protocol DMX512, or RDM, or ArtNet, and its data frame format is not detailed here.

Based on the DMX512 communication protocol, in order to control the projector, the following channel table is used in the first serial communication data frame.

Table 4: Examples of channel commands for the DMX512 communication protocol

aisle	Features	value
1	Play picture	0-255 corresponds to 256 pictures
2	Play video	0-255 corresponds to 256 videos
3	Dimming	0-255 darkest to brightest
4	Video pause / resume	0 for continuous playback 1-255 for pause playback

The list of RDM function commands is as follows:

Table 5: Examples of RDM function commands

Preferably, the first serial interface is an RS485 interface and / or an RJ45 network interface. It can be understood that the RS485 interface corresponds to the DMX512 or RDM communication protocol, and the RJ45 network interface corresponds to the ArtNet communication protocol.

Preferably, the second serial interface is a serial interface based on a TTL, RS-232, or RS-485 level standard. As shown in FIG. 6, for a projector using an RS-232 serial interface in the prior art, for improvement, the second serial interface is an RS-232 serial interface.

Preferably, referring to FIG. 5, based on the DMX512 communication protocol, the lighting console can send at least the following control signals: play pictures, play videos, adjust brightness, and pause or resume the video. Table 4 shows the channels of the DMX512 communication protocol that implement these functions.

Preferably, referring to FIG. 5, based on the RDM communication protocol, the lighting console can also send at least the following control signals: display device information, set projection direction, focus, correct color, trapezoidal correction, set power on, virtual remote Projector button, and switch the projector working mode. Table 5 lists the data frame format of these RDM communication protocol function commands.

Preferably, the light console can control multiple projectors synchronously or asynchronously. Such a configuration allows multiple projector lights to change into a phantom like a professional stage, even more so, because the light of the projector is more gorgeous because of the rich multimedia content it plays.

Preferably, referring to FIG. 6 to FIG. 10, the serial control processing module includes a microprocessor main control circuit MCU, a first serial control circuit, and a second serial control circuit RS232, wherein the first serial The control circuit includes a serial control circuit DMX512 & RDM and / or a serial control circuit ArtNet;

The microprocessor main control circuit MCU is electrically connected to the first serial control circuit, and the first serial control circuit is electrically connected to a first serial interface;

The microprocessor main control circuit MCU is electrically connected to the second serial control circuit RS232, and the second serial control circuit RS232 is electrically connected to a second serial interface.

FIG. 6 shows a layout of circuit elements of a serial control circuit board. The microprocessor main control circuit MCU includes a control chip U1 and a crystal oscillator OSC1; the serial control circuit DMX512 & RDM includes a control chip U5; the serial control circuit ArtNet includes a control chip U2, a control chip U17, and a control chip U18; the second serial control circuit RS232 includes a control chip U3.

It can be understood that the first serial control circuit may include only the serial control circuit DMX512 & RDM, or only the serial control circuit ArtNet, or both the serial control circuit DMX512 & RDM and the serial control circuit ArtNet.

Preferably, as shown in FIG. 8, the second and third pins of the control chip U5 of the serial control circuit DMX512 & RDM are electrically connected to the 37th pin of the control chip U1 of the microprocessor main control circuit MCU; the control The fourth pin of the chip U5 is electrically connected to the 47th pin of the control chip U1; the first pin of the control chip U5 is electrically connected to the 48th pin of the control chip U1; the control chip U5 The sixth pin of the first serial interface is electrically connected to the third pin of the first serial interface; the seventh pin of the control chip U5 is electrically connected to the second pin of the first serial interface.

As shown in FIG. 10, the first pin of the control chip U18 of the serial control circuit ArtNet is electrically connected to the 41st pin of the control chip U2; the third pin of the control chip U18 is connected to the 42nd pin of the control chip U2 The 6th pin of the control chip U18 is electrically connected to the 44th pin of the control chip U2; the 8th pin of the control chip U18 is electrically connected to the 45th pin of the control chip U2.

As shown in FIG. 10, the first pin of the control chip U17 of the serial control circuit ArtNet is electrically connected to the 34th pin of the control chip U2; the third pin of the control chip U17 is connected to the 35th pin of the control chip U2 The 6th pin of the control chip U17 is electrically connected to the 37th pin of the control chip U2; the 8th pin of the control chip U17 is electrically connected to the 38th pin of the control chip U2.

As shown in FIGS. 7 and 10, the 30th pin of the control chip U2 of the serial control circuit ArtNet is electrically connected to the 29th pin of the control chip U1 of the microprocessor main control circuit MCU.

As shown in FIG. 9, the second pin of the second serial interface is electrically connected to the thirteenth pin of the control chip U3 of the second serial control circuit RS232; the third pin of the second serial interface It is electrically connected to the 14th pin of the control chip U3 of the second serial control circuit RS232.

As shown in FIGS. 9 and 7, the 12th pin of the control chip U3 of the second serial control circuit RS232 is electrically connected to the 26th pin of the control chip U1 of the microprocessor main control circuit MCU; the second string The 11th pin of the control chip U3 of the row control circuit RS232 is electrically connected to the 25th pin of the control chip U1 of the microprocessor main control circuit MCU.

Preferably, the control chip U1 is STM32F103 or STM32F413 produced by STMicroelectronics, the control chip U2 is a gateway chip, and DM9006 produced by Davcom is selected. The control chip U1 and the control chip U2 communicate with each other through parallel data transmission methods. STM32's FSMC technology is implemented, and the communication protocol between the two is determined by the network card chip. DM9006 forwards the data sent by the lighting console through the network cable to the microprocessor main control circuit MCU. The microprocessor main control circuit MCU gets the ArtNet data packet, and uses the ArtNet protocol to interpret the data, then execute the command and feedback the information.

The control chip U17 and the control chip U18 are transformers, which are used to transform the voltage without affecting the logic calculation.

The control chip U3 is, for example, an RS232 chip, and the control chip U5 is, for example, an RS485 chip.

The light control signal passes through the first serial interface, the first serial control circuit such as the serial control circuit DMX512 & RDM or the serial control circuit ArtNet, the microprocessor main control circuit MCU, and the second serial control circuit RS232 to the second The serial interface further controls the light-machine component to respond to the light control signal through the projector driving board.

It can be understood that, referring to FIG. 6, in a case where a light control signal based on a DMX512 or RDM communication protocol is used, the first serial interface is the serial interface 11 in FIG. 6. In the case of using a light control signal based on the ArtNet communication protocol, the first serial interface is the serial interface 12 in FIG. 6. The second serial interface shown in FIG. 6 is a 9-pin RS232 serial interface.

Preferably, the projector is controlled by using a DMX signal, so that the projector and the digital lighting equipment can work together under the control of the DMX signal to achieve integrated performance and control. Such a cooperative working configuration can make use of the advantages of a projector and digital lighting equipment to create a richer lighting effect. For example, the lighting control console sends the brightness adjustment control signal to the digital lighting equipment, and sends the control signal for playing the video to the projector, so that the light and shadow effect of playing the video under the ambient light with varying brightness can be formed.

Preferably, using the DMX signal, the projector's animation playback, 2D effect playback, 3D effect playback, and white balance, contrast, projection correction, focus, image inversion, keystone correction, level correction, and power switch can be controlled. It can be understood that these control functions of the projector can be realized by the extended commands of the DMX communication protocol.

According to an embodiment of the projector control system based on the light control data transmission protocol of the present invention, referring to FIG. 2, the projector control system includes a light console and at least one of the projectors based on the light control data transmission protocol. .

Preferably, the projector control system further includes at least one digital lighting device.

As the light of the projector changes due to the rich multimedia content it plays, such a projector control system can obtain a wider variety of professional stage / landscape lighting effects.

Preferably, the lighting controller uses DMX, or RDM, or ArtNet signals to control a plurality of the projectors, so that the plurality of the projectors are projected together and stitched into a larger image without the need of a computer PC or Media server for perfect seamless puzzles.

The above describes the preferred or specific embodiments of the present invention in detail. It should be understood that those skilled in the art can make many modifications and changes according to the design concept created by the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the technical field based on the present invention based on the existing technology through logical analysis, reasoning, or limited experiments should be within the scope of the present invention and / Or within the scope of protection defined by the claims.

Claims (19)

1. A projector based on a light control data transmission protocol, wherein the light control data transmission protocol is DMX512, or RDM, or ArtNet, characterized in that the projector includes an optical-mechanical component, a projector driving board, and a serial control circuit Board where

   The serial control circuit board includes a first serial interface, a serial control processing module, and a second serial interface;

   The serial control processing module is respectively connected to the first serial interface and the second serial interface;

   The lighting control console and the first serial interface of the serial control circuit board perform a first serial data communication connection based on the lighting control data transmission protocol;

   A second serial interface of the serial control circuit board is connected to the projector driving board through a second serial data communication connection method based on a second serial communication protocol;

   The serial control processing module, by means of the first serial data communication connection, can obtain a control signal sent by the lighting console, perform logical operation processing on the control signal, and process the control signal as The signal format that can be directly applied by the projector driving board is sent to the projector driving board through the second serial interface, so as to control the optical-mechanical component to respond to the control signal.
2. The projector according to claim 1, wherein the projector further comprises a memory, wherein the memory stores rich multimedia content;

   The lighting console can send a playback signal, and through the serial control circuit board, display the rich multimedia content in the projector.
3. The projector according to claim 1, wherein the serial control circuit board further comprises a first power interface for providing working power to the serial control circuit board through the projector driving board, wherein The first power interface is connected to a second power interface of the projector driving board.
4. The projector according to claim 1, wherein the frame format of the second serial communication protocol comprises: a frame header, a version, a frame length, a command code, data, and a check code.
5. The projector according to claim 1, wherein the first serial interface is an RS485 interface and / or an RJ45 network interface; or

   The second serial interface is a serial interface based on a TTL, RS-232, or RS-485 level standard.
6. The projector according to claim 1, characterized in that: based on the DMX512 communication protocol, the lighting console is capable of sending at least the following control signals: playing pictures, playing videos, adjusting brightness, and pausing or continuing the video.
7. The projector according to claim 1, characterized in that: based on the RDM communication protocol, the lighting console is further capable of sending at least the following control signals: display device information, setting projection direction, focusing, color correction, keystone correction, setting Power on, virtual remote control buttons, and switch the projector working mode.
8. The projector according to claim 1, wherein the lighting controller can control multiple projectors synchronously or asynchronously.
9. The projector according to claim 1, wherein the serial control processing module comprises a microprocessor main control circuit MCU, a first serial control circuit, and a second serial control circuit RS232, wherein the The first serial control circuit includes a serial control circuit DMX512 & RDM and / or a serial control circuit ArtNet;

   The microprocessor main control circuit MCU is electrically connected to the first serial control circuit, and the first serial control circuit is electrically connected to a first serial interface;

   The microprocessor main control circuit MCU is electrically connected to the second serial control circuit RS232, and the second serial control circuit RS232 is electrically connected to a second serial interface.
10. The projector according to claim 9, characterized in that: the microprocessor main control circuit MCU includes a control chip U1 and a crystal oscillator OSC1; the serial control circuit DMX512 & RDM includes a control chip U5; and the serial control circuit ArtNet The control chip U2 includes a control chip U2, a control chip U17, and a control chip U18. The second serial control circuit RS232 includes a control chip U3.
11. The projector according to claim 10, wherein the second and third pins of the control chip U5 of the serial control circuit DMX512 & RDM and the 37th pin of the control chip U1 of the microprocessor main control circuit MCU are electrically connected. Connection; the fourth pin of the control chip U5 is electrically connected to the 47th pin of the control chip U1; the first pin of the control chip U5 is electrically connected to the 48th pin of the control chip U1; The sixth pin of the control chip U5 is electrically connected to the third pin of the first serial interface; the seventh pin of the control chip U5 is electrically connected to the second pin of the first serial interface connection.
12. The projector according to claim 10, wherein: the first pin of the control chip U18 of the serial control circuit ArtNet is electrically connected to the 41st pin of the control chip U2; the third pin of the control chip U18 It is electrically connected to the 42th pin of the control chip U2; the 6th pin of the control chip U18 is electrically connected to the 44th pin of the control chip U2; the 8th pin of the control chip U18 is electrically connected to the 45th pin of the control chip U2 connection.
13. The projector according to claim 10, wherein the first pin of the control chip U17 of the serial control circuit ArtNet is electrically connected to the 34th pin of the control chip U2; the third pin of the control chip U17 It is electrically connected to the 35th pin of the control chip U2; the 6th pin of the control chip U17 is electrically connected to the 37th pin of the control chip U2; the 8th pin of the control chip U17 is electrically connected to the 38th pin of the control chip U2 connection.
14. The projector according to claim 10, wherein the second pin of the second serial interface is electrically connected to the thirteenth pin of the control chip U3 of the second serial control circuit RS232; the second The third pin of the serial interface is electrically connected to the 14th pin of the control chip U3 of the second serial control circuit RS232.
15. The projector according to claim 10, wherein the twelfth pin of the control chip U3 of the second serial control circuit RS232 and the twenty-sixth pin of the control chip U1 of the microprocessor main control circuit MCU The 11th pin of the control chip U3 of the second serial control circuit RS232 is electrically connected to the 25th pin of the control chip U1 of the microprocessor main control circuit MCU.
16. The projector according to claim 1, characterized in that: the DMX signal is used to control the projector, so that the projector and the digital lighting equipment can work together under the control of the DMX signal to achieve integrated performance and control .
17. The projector according to claim 1, wherein the DMX signal is used to control the animation playback, 2D effect playback, 3D effect playback, and white balance, contrast, projection correction, focus, and image inversion of the projector. , Keystone correction, level correction, power switch.
18. The projector control system based on the light control data transmission protocol is characterized in that it comprises a light control console and at least one projector based on the light control data transmission protocol according to any one of claims 1 to 17.
19. The projector control system based on the light control data transmission protocol according to claim 18, wherein the light console uses DMX, RDM, or ArtNet signals to control a plurality of the projectors, so that a plurality of the projectors are controlled. The projectors project together and stitch together into a larger image without the need of a computer PC or a media server to achieve a perfect seamless puzzle.

Images