CN211350061U - Control device for automatically lighting LED screen - Google Patents
Control device for automatically lighting LED screen Download PDFInfo
- Publication number
- CN211350061U CN211350061U CN201922283333.0U CN201922283333U CN211350061U CN 211350061 U CN211350061 U CN 211350061U CN 201922283333 U CN201922283333 U CN 201922283333U CN 211350061 U CN211350061 U CN 211350061U
- Authority
- CN
- China
- Prior art keywords
- circuit
- led
- microcontroller
- control device
- led unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The application discloses controlling means of automatic lighting LED screen, controlling means includes: the LED unit board is coupled with the detection circuit, and the detection circuit is used for traversing and detecting the characteristic information of each LED in the LED unit board array; the control module is electrically connected with the detection circuit and used for matching the related information database board to obtain onboard information according to the characteristic information; and according to the on-board information of the LED unit board identified by the detection circuit, the LED unit board is controlled to be lightened, and a preset pattern is displayed. The device for automatically lighting the LED screen does not need human intervention, automatically acquires onboard information of the LED unit board through parallel control of the control module and the microcontroller, and can automatically light the LED screen according to the onboard information.
Description
Technical Field
The present application relates to the field of electronic technologies, and in particular, to a control device for automatically lighting an LED screen.
Background
With the application and rapid popularization of network technology, computer information technology and automatic control technology in the field of electronic digital display, the advertisement, publicity, collection, processing and image display of various information need to be collected and edited in a dispatching command center and uploaded to a screen display screen for display in time, more and more screen digital splicing systems can display various video signals into required images on the screen digital splicing wall, so that a set of information display management control system with complete functions and advanced technology is formed, a vivid interactive man-machine interface is provided for a user, the requirements of information real-time rebroadcasting, multi-picture advertisement and publicity display in various occasions can be completely met, today, the century intelligent LED display screen presents subdivision, diversified potentials in the product application field, intelligent traffic, intelligent screen monitoring, intelligent display, intelligent video and the like, In the fields of various industries such as intelligent stages, intelligent advertisements and the like, various intelligent LED display products such as intelligent small-space intelligent full-color LED display screens, intelligent transparent screens and the like are developed, and meanwhile, new scientific and technological products of the movable colorful screen curtain are also developed, so that more means for designing and researching and developing aiming at user-level operators are needed, the general requirements of users can be really met, the common intellectualization of product markets is realized, and the requirements of larger markets are finally met;
in the current LED screen control system, various parameters and various specification information of a screen need to be configured manually through client software to realize normal display of the screen, and operators need to understand certain knowledge related to the LED control system and learn a control platform of a manufacturer; in practical application, many engineers do not understand the use and principle of the control system, and great inconvenience is caused to the LED application process.
SUMMERY OF THE UTILITY MODEL
The application provides a control device and a control method for automatically lighting an LED screen, which aim to solve the problem that the screen is lighted by manually configuring various parameters and specification information of the screen in the prior art.
In order to solve the above technical problem, a technical solution adopted by the present application is a control device for automatically lighting an LED screen, the control device including:
the LED unit board is coupled with the detection circuit, and the detection circuit is used for traversing and detecting the characteristic information of each LED in the LED unit board array;
the control module is electrically connected with the detection circuit and used for matching the related information database board to obtain onboard information according to the characteristic information; and the LED unit board is controlled to be lightened according to the on-board information of the LED unit board identified by the detection circuit.
In one embodiment of the above solution, the detection circuit includes a sampling resistor, an amplifying circuit, and a microcontroller; two ends of the sampling resistor are respectively connected with the positive input end and the negative input end of the amplifying circuit; the output end of the amplifying circuit is connected with the input end of the microcontroller; the amplifying circuit is used for collecting voltages at two ends of the sampling resistor; and sending the acquired voltage value to a microcontroller to obtain the current detection current of the current LED unit board.
In an embodiment of the foregoing scheme, the detection circuit further includes a constant current circuit, one end of the constant current circuit is connected to the ground, one end of the constant current circuit is connected to the sampling resistor, and the other end of the constant current circuit is electrically connected to the microcontroller;
the constant current circuit is used for calibrating the current value identified by the microcontroller so as to judge the lighting condition of the LED unit board.
In an embodiment of the foregoing scheme, the control device further includes a switching power supply module, and the switching power supply module is electrically connected to the detection circuit and is configured to provide power input to the detection circuit and the LED unit board.
In an embodiment of the foregoing scheme, the control circuit is an FPGA.
In an embodiment of the foregoing scheme, the detection circuit further includes an analog-to-digital converter, one end of the analog-to-digital converter is connected to the microcontroller, and the other end of the analog-to-digital converter is connected to the amplification circuit, so that the acquired voltage value is amplified by the amplification circuit and then subjected to analog-to-digital conversion in the analog-to-digital converter.
In an embodiment of the foregoing scheme, the microcontroller is connected to the control module through a serial port.
In one embodiment of the above solution, the amplifying circuit is an instrumentation amplifier.
In an embodiment of the foregoing scheme, a switch circuit is further disposed between the amplifying circuit and the microcontroller, one end of the switch circuit is connected to the microcontroller, the other end of the switch circuit is connected to the amplifying circuit through an on-resistor, an input of the switch circuit is connected to a PGA + pin of the amplifying circuit through 4 on-resistors, and an output of the switch circuit is connected to a PGA-pin of the amplifying circuit. And the other port of the switch circuit is connected with the microcontroller.
Different from the prior art, the beneficial effects of this application are: based on the technical scheme, the device and the method for automatically lighting the LED screen are realized, manual intervention is not needed, onboard information of the LED unit board is automatically acquired through parallel control of the control module and the microcontroller, and the LED screen can be automatically lighted according to the onboard information.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a block diagram of an embodiment of a control device for automatically lighting an LED screen;
FIG. 2 is a flow chart of a method of control of automatically illuminating an LED screen;
FIG. 3 is a hardware configuration diagram of an embodiment of a control method for automatically lighting an LED screen according to the present application;
fig. 4 is a circuit diagram of an embodiment of a control device for automatically lighting an LED screen according to the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the current LED screen control system, various parameters and various specification information of a screen need to be manually configured through client software to realize normal display of the screen, and an operator needs to understand certain knowledge related to the LED control system and learn a control platform of a manufacturer; in practical application, many engineers do not understand the use and principle of the control system, and great inconvenience is caused to the LED application process.
In order to solve the technical problem of automatic lighting of an LED screen, the application provides a control device and a control method particularly relating to automatic lighting of the LED screen. Referring to fig. 1 in detail, fig. 1 is a schematic structural diagram of a control device for automatically lighting an LED screen according to the present application.
The first embodiment is as follows:
as shown in fig. 1, the control device for automatically lighting an LED screen of the present embodiment — includes at least a detection circuit 10 and an LED unit board 11; wherein the LED unit board is coupled to the detection circuit, and the detection circuit 10 is used for identifying the characteristic information of the LED unit board 11;
the control module 13 is electrically connected with the detection circuit 10 and is used for matching a related preset information database template according to the characteristic information; and obtaining onboard information according to the matched preset database board so that the LED unit board is lightened. And controlling to light the LED unit board 11 and display a preset pattern according to the information characteristics of the LED unit board 11 identified by the detection circuit 10. The microcontroller 15 obtains onboard information according to the matched preset database board, so that the LED unit board is lightened, and further, the control of the whole set of system on the LED display screen and the correct display image can be automatically set. The embodiment is characterized in that the whole LED unit board is automatically lighted by the system, and the trouble of manually configuring parameters to light the LED unit board can be saved.
The detection circuit 10 comprises an amplifying circuit 14, and the amplifying circuit 14 at least comprises a sampling resistor 12, an amplifying circuit 14 and a microcontroller 15;
two ends of the sampling resistor 12 are respectively connected with a positive input end and a negative input end of the amplifying circuit 14; the input end of the amplifying circuit 14 is connected with the sampling resistor 12, and the output end of the amplifying circuit is connected with the input end of the microcontroller 15; the amplifying circuit 14 is used for collecting the voltage across the sampling resistor 12. The amplifying circuit is used for collecting voltages at two ends of the sampling resistor; and sends the collected voltage value to the microcontroller to obtain the current detected current of the LED unit panel 11.
In this embodiment, the amplifying circuit 14 amplifies the collected voltage collected by the sampling resistor 12 by a preset multiple, and sends the amplified voltage to the microcontroller 15. The amplifying circuit 14 in this embodiment is an instrumentation amplifier, in this embodiment, an INA482 model is preferred, which is a low-cost instrumentation amplifier capable of providing low power consumption and a wide voltage range, and of course, chips having the same function to achieve the same function are all within the scope included in this application.
The microcontroller 15 further includes an analog-to-digital converter ADC, so that the acquired voltage value is amplified by the amplifying circuit and then subjected to analog-to-digital conversion in the analog-to-digital converter.
The detection circuit 10 further comprises a constant current circuit 17, one end of the constant current circuit 17 is connected with the ground, one end of the constant current circuit is connected with the sampling resistor, and the other end of the constant current circuit 17 is electrically connected with the microcontroller;
the constant current circuit 17 is used for calibrating the current value identified by the microcontroller so as to judge the lighting condition of the LED unit board; in this embodiment, the constant current is used for calibration, and after the calibration of the constant current power supply 17 is performed, the detection state is switched to detect the current of the LED.
The constant current circuit 17 includes a DC constant current source of 10 mA.
A switch circuit is further disposed between the amplifying circuit 14 and the microcontroller 15, one end of the switch circuit is connected to the microcontroller, and the other end of the switch circuit is connected to the amplifying circuit through an on-resistance. The input of the switch circuit is connected with the PGA + pin of the amplifying circuit 14 through 4 on-resistances, and the output end of the switch circuit is connected with the PGA-pin of the amplifying circuit 14. And the other port of the switching circuit is connected to the microcontroller 15.
The control module 13 is an FPGA. The FPGA is only one mode provided in the embodiment of the present application, and may also control the microcontroller in the embodiment of the present application to light the LED screen in other programmable modes. Such as by a computer-written control program.
The microcontroller is connected with the control module through a serial port. Of course, the embodiment is not limited to the serial port connection mode.
The control module and the microcontroller control and scan the LED screen in parallel, acquire onboard information of the screen, and control the detection module to automatically light the LED screen. And controlling to light the LED unit board according to the information characteristics of the LED unit board identified by the detection circuit, and displaying a preset pattern. Therefore, the scheme avoids the trouble caused by manually configuring various parameters and various specification information of the screen to realize normal display of the screen, and realizes the effects of automatic identification and detection of the LED screen and lighting of the LED screen through parallel control of the microcontroller and the control module.
The control device further comprises a switching power supply module, wherein the switching power supply module is electrically connected with the detection circuit 10 and the LED unit board 11 and is used for providing energy for power input of the detection circuit and the LED unit board. The power module in this embodiment is a constant current power supply that satisfies the rated power of the LED unit board. And is not limited to a specific circuit form.
In the present embodiment, it is preferred that,
example two:
referring to fig. 2, a control method for automatically lighting an LED screen includes the following steps:
s1, receiving the detected characteristic information of each LED in the LED unit board array;
s2, matching a related preset information database template according to the characteristic information;
s3, obtaining onboard information according to the matched preset database board, and enabling the LED unit board to be lightened and display preset patterns according to the onboard information.
In step S1, the step of detecting characteristic information of each LED in the LED unit panel includes: s11 scanning the number of the row points and the number of the column points of the LED unit board to obtain the total number of the points of the LED unit board; s12, acquiring characteristic information of the LED unit board;
in this embodiment, the LED unit board is a screen for displaying a predetermined pattern, and is a dot matrix including a plurality of LED lamps. According to the control module in the first embodiment, the FPGA receives a host program signal, starts to read parameters, and firstly acquires the number of LED points in the LED unit board; the FPGA scans the number of lines (X, 0) one by one according to a received command of the microcontroller MCU; and continuously receiving the command of the microcontroller MCU, scanning the number of the LEDs in the column (0, Y), and multiplying the scanned number of the LEDs in the horizontal axis and the scanned number of the LEDs in the number axis to obtain the total number of the LEDs in the LED unit board, namely the display area of the LED plane. After the scanning of the step is finished, the command of the microcontroller MCU is received, and the scanning is closed.
Acquiring LED characteristic information: including OE polarity identification, coordinate position of the light emitting device, scanning mode (static scanning or dynamic scanning).
Preferably, in the process of acquiring the LED characteristic information, the preferred characteristic information is selected. The scheme for selecting the optimal parameters comprises the following steps: and recording the characteristic information of multiple scanning of each LED lamp, and selecting the optimal characteristic information as one of the output characteristic information. The plurality of scans is not limited to the number of times and may include two or more scans.
The recorded optimal characteristic information of the scanning can be stored and can be preferentially called in the next scanning.
Preferably, the LED characteristic information may further include: environmental information; the control module detects and sends the instruction, and detects the environmental information of the LED unit board, specifically including day or night; weather conditions or whether outdoor or indoor; and adjusting different brightness parameters according to different environment information.
Further, the environment information may further include application scene information, such as a fence LED display screen, a vehicle-mounted LED display screen, a security monitoring LED display screen, and the like, and different brightness and colors are controlled and adjusted according to different application scenes.
Preferably, the step of detecting characteristic information of each LED in the LED unit panel further includes: and positioning and detecting the damaged LED lamp, and recording the area corresponding to the coordinate. In the scanning process, damaged or abnormal LED points are checked, and abnormal conditions displayed subsequently are eliminated.
In this embodiment, step S2 matches the preset information database template according to the feature information;
the onboard information of the LED screen is pre-stored in a flash of a memory, is generally a self-contained word bank of an LED dot matrix, and drives the LED lamp to be lighted by virtue of hardware scanning of a control module. Therefore, matching the OE polarity identification, the coordinate position of the light emitting device, and the scanning manner acquired in S2 in the preset information database template to obtain onboard information of the LED unit board including the above parameters.
In the present embodiment, the step S3, controlling the lighting of the LED unit board according to the onboard information, includes the following sub-steps:
s31, reading onboard information by the control module, and receiving a command of the control module for lighting the LED;
the microcontroller controls the lighting of the LED lamp, and the LED lamp is sent according to the detection module in the first embodiment, the detection module detects the current condition of the LED unit board, and sends an instruction to the control module according to the obtained current magnitude to judge whether the control module needs to be lighted.
The S32 microcontroller illuminates the LED lights in the rows and columns in a traversal fashion based on the current magnitude.
When the detection module detects the current of one LED lamp, the microcontroller can light the corresponding LED lamp in the array according to the instruction sent by the control module until all the lamps in the array in the LED unit board are lighted.
The S33 microcontroller sends a complete command to the control module.
Preferably, in this embodiment, after the completion instruction is sent, the microcontroller waits for a feedback result of the detection circuit, and turns off the instruction for lighting the LED unit panel after the abnormality occurs.
Preferably, the LED lamps of the lit LED unit panel are subjected to chromaticity correction and/or luminance correction. As for the chromaticity correction, a color gamut space transformation method not limited to the conventionally used one may be used, the correction of the color gamut space requires the original three primary color coordinate values, and may be obtained by calculating the average color coordinates of the measurement region using the conventional color luminance. However, since the RGB luminance ratios of each pixel are different, the display uniformity after correction needs to be ensured, and the color gamut space correction must be combined with the luminance measurement values of the lamp points to calculate a point-by-point conversion correction coefficient matrix, which is provided to the control module.
Regarding the luminance correction: the duty ratio of the RGB three-primary-color LED required by the brightness level can be calculated by using a point-by-point correction method, and the current correction is carried out by Pulse Width Modulation (PWM). Of course, in the present embodiment, the method is not limited to this method, and other methods commonly used in the art for performing luminance correction are used.
Example three:
to implement the control method for automatically lighting the LED screen according to the above embodiment, the present application provides a control device for automatically lighting the LED screen, and specifically refer to fig. 3, where fig. 3 is a schematic structural diagram of another embodiment of the control device for automatically lighting the LED screen according to the present application.
The control module 13 of the present embodiment includes a memory 131 and a processor 132, wherein the memory 131 is coupled to the processor 132.
The memory 131 is used for storing program data, and the processor 132 is used for executing the program data to implement the method of automatically lighting the LED screen according to the above-mentioned embodiment.
In the present embodiment, the processor 132 may also be referred to as a CPU (Central Processing Unit). The processor 132 may be an integrated circuit chip having signal processing capabilities. The processor 132 may also be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. A general purpose processor may be a microprocessor or the processor 132 may be any conventional processor or the like.
Embodiments of the present application may be implemented in software functional units and may be stored in a computer readable storage medium when sold or used as a stand-alone product. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.
Claims (10)
1. A control device for automatically illuminating an LED screen, the control device comprising:
the LED unit board is coupled with the detection circuit, and the detection circuit is used for traversing and detecting the characteristic information of each LED in the LED unit board array;
the control module is electrically connected with the detection circuit and used for matching the related information database board to obtain onboard information according to the characteristic information; and the LED unit board is controlled to be lightened according to the on-board information of the LED unit board identified by the detection circuit.
2. The control device for automatically lighting an LED screen according to claim 1, wherein the detection circuit comprises a sampling resistor, an amplification circuit and a microcontroller;
two ends of the sampling resistor are respectively connected with the positive input end and the negative input end of the amplifying circuit; the output end of the amplifying circuit is connected with the input end of the microcontroller;
the amplifying circuit is used for collecting voltages at two ends of the sampling resistor; and sending the acquired voltage value to a microcontroller to obtain the current detection current of the current LED unit board.
3. The control device for automatically lighting an LED screen according to claim 2, wherein the detection circuit further comprises a constant current circuit, one end of the constant current circuit is connected to the ground, one end of the constant current circuit is connected to the sampling resistor, and the other end of the constant current circuit is electrically connected to the microcontroller;
the constant current circuit is used for calibrating the current value identified by the microcontroller so as to judge the lighting condition of the LED unit board.
4. The control device for automatically lighting an LED screen according to claim 3, further comprising a switching power supply module electrically connected to the detection circuit for providing power input to the detection circuit and the LED unit panel.
5. The control device for automatically illuminating an LED screen of claim 1 wherein the control module is an FPGA.
6. The control device for automatically lighting an LED screen according to claim 2, wherein: the detection circuit further comprises an analog-to-digital converter, one end of the analog-to-digital converter is connected with the microcontroller, and the other end of the analog-to-digital converter is connected with the amplifying circuit, so that the acquired voltage value is amplified by the amplifying circuit and then is subjected to analog-to-digital conversion in the analog-to-digital converter.
7. The control device for automatically lighting an LED screen according to claim 6, wherein: the microcontroller is connected with the control module through a serial port.
8. The control device for automatically lighting an LED screen according to claim 1, wherein: the characteristic information comprises one or more of OE polarity identification, coordinate positions of the light-emitting devices and scanning modes.
9. The control device for automatically lighting an LED screen according to claim 2, wherein: the amplifying circuit is an instrument amplifier.
10. The control device for automatically lighting an LED screen according to claim 9, wherein: a switch circuit is also arranged between the amplifying circuit and the microcontroller, one end of the switch circuit is connected with the microcontroller, the other end of the switch circuit is connected with the amplifying circuit through an on-resistance, the input of the switch circuit is connected with a PGA + pin of the amplifying circuit through 4 on-resistances, and the output end of the switch circuit is connected with the PGA-pin of the amplifying circuit; and the other port of the switch circuit is connected with the microcontroller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922283333.0U CN211350061U (en) | 2019-12-18 | 2019-12-18 | Control device for automatically lighting LED screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922283333.0U CN211350061U (en) | 2019-12-18 | 2019-12-18 | Control device for automatically lighting LED screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211350061U true CN211350061U (en) | 2020-08-25 |
Family
ID=72133400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922283333.0U Active CN211350061U (en) | 2019-12-18 | 2019-12-18 | Control device for automatically lighting LED screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211350061U (en) |
-
2019
- 2019-12-18 CN CN201922283333.0U patent/CN211350061U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101325038B (en) | LCD and driving method thereof | |
| CN111326099B (en) | Display correction method, device and system, storage medium and display system | |
| JP5320738B2 (en) | Light emission control system and image display system | |
| CN105247607A (en) | Methods and systems for measuring and correcting electronic visual displays | |
| KR102330949B1 (en) | Smart LED display board and image output method using the same | |
| CN104900188B (en) | LED display uniformity correcting method | |
| CN1882040A (en) | Image display device and method | |
| CN104200775A (en) | LED defective pixel treatment method | |
| DE112018003356T5 (en) | LIGHT-BASED REFERENCE POINT COMMUNICATION | |
| CN101165569A (en) | Display apparatus and control method thereof | |
| CN101556787A (en) | Method for adjusting image quality | |
| CN101025893A (en) | Scanning LED display device | |
| CN112185301B (en) | Display device correction method and device and processor | |
| CN116312343A (en) | Point-to-point correction method for LED lamps in special-shaped curved surface screen | |
| CN109887450B (en) | Artificial intelligent detection method for LED display screen | |
| CN111048034A (en) | Control device and method for automatically lighting LED screen | |
| CN112598582A (en) | Image correction and correction data generation method, device and system and display method | |
| CN113191988B (en) | Brightness correction method and device, storage medium and electronic device | |
| CN211350061U (en) | Control device for automatically lighting LED screen | |
| CN103531173B (en) | A kind of screen color method of adjustment and device | |
| CN110719382B (en) | Color replacement method and device | |
| CN101515438B (en) | Display system of point-to-point brightness control and a method | |
| CN208157018U (en) | A kind of Micro-LED display system | |
| CN110428771A (en) | Repair the method and system of dim spot caused by defect pixel | |
| CN101515439B (en) | Point-to-point brightness control system and a method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |