CN105357799B - LED display module managing devices - Google Patents
LED display module managing devices Download PDFInfo
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- CN105357799B CN105357799B CN201510836378.XA CN201510836378A CN105357799B CN 105357799 B CN105357799 B CN 105357799B CN 201510836378 A CN201510836378 A CN 201510836378A CN 105357799 B CN105357799 B CN 105357799B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
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Abstract
The present invention relates to a kind of LED display modules managing device, the microprocessor module of LED display modules is suitably applied, and LED display modules also include module displays drive circuit and the module input/output interface being connected with its input.The LED display modules managing device includes：Winding displacement detection module, the aerial lug of the module input/output interface is connected to detect as current external interrupt source one by one with the presence or absence of exception for being timed many holding wires that will be connected between the output end of the module displays drive circuit and the microprocessor module by the use of timer, and many holding wires are to use timer to overflow interruption to switch one by one as current external interrupt source.The present invention realizes the intelligent management to LED display modules by carrying out programming to microprocessor module, is to be capable of achieving winding displacement detection, even various functions such as point inspection, IAP functions, operating temperature record, operating voltage record, flash memory management, empowerment management using serial communication.
Description
Technical field
The present invention relates to LED display control technologies field, more particularly to a kind of LED display modules managing device.
Background technology
Existing light emitting diode (light emitting diode, LED) display screen system includes that receiving card and LED are aobvious
Display screen, wherein LED display are formed by multiple box body splicings, and each casing is by multiple LED display modules (or LED
Plate) it is spliced.Memory is provided with traditional LED display modules, is written and read by receiving card, realize lamp plate correction system
The management of the items module information such as number, production information, in order to realize correction data and production information management, uses in traditional approach
Receiving card directly accesses the memory in LED display modules by SPI interface or I2C interfaces, there is control line using SPI interface
Many problems (SPI interface needs 4 holding wires, and such as needing lamp plate to cascade also needs additionally to increase by two addressing lines), use I2C interfaces
Control line can less slightly (I2C interfaces need 2 holding wires, and such as needing lamp plate to cascade also needs additionally to increase by two addressing lines), but I2C connects
The traffic rate of mouth is relatively low (usually 400kbps).And, LED display modules have the shape for carrying out winding displacement detection and error detection
State detection demand.
Fig. 1 is referred to, it is a kind of configuration diagram of existing LED display modules condition detecting system.Such as Fig. 1 institutes
Show, control card is sent a command to using single-chip microcomputer timing, represent that control card is intact if control card has response；And in order to obtain
The damage information of LED display modules, single-chip microcomputer can send the certain content of correspondence LED display modules to control card, by control card
To carry out display drive control, and operating current during by current detection module collection LED display module display different patterns, root
The failure situation of LED display modules is judged according to the change of electric current.However, the shortcoming that technical scheme shown in Fig. 1 is present is：1) by
In LED over time, luminosity can be changed, so detecting that the error whether LED damages is very big with electric current；If 2)
Simultaneously with the presence of open circuit, short circuit in LED display modules, then testing result can have missing inspection situation；3) point inspection result receives electric current
Detection method influences larger with precision；And 4) lamp point quantity, position and the color of specific damage cannot be determined.
Fig. 2 is referred to, for the LED drive chip in LED display modules has the situation of point checking functions, one kind is done
Method is to connect a monitor card again after the LED display modules of receiving card connection, for receiving the data of LED drive chip output；
When card start-up point checking functions are received, can be examined to LED drive chip sending point and instructed, LED drive chip can detect each LED
The break-make situation of point, and store the result into the register of inside, after the inspection result retaking of a year or grade of card start-up point is received, these point inspections
Result data back kick can transport to the LED drive chip of afterbody LED display modules and export to monitor card successively, by monitor card
An inspection result data is returned into receiving card again.However, the shortcoming that technical scheme shown in Fig. 2 is present is：I) need to increase monitoring
Card and number of cables, cause cost to increase；And ii) if wherein somewhere winding displacement open circuit, can cause detection to fail.
Fig. 3 is referred to, it is a kind of improvement project of technical scheme shown in Fig. 2, and monitor card specially is replaced by into end
Termination module, the point inspection result data of LED drive chip output is returned by end termination module, then gradually by each
LED display modules are back to receiving card.However, technical scheme shown in Fig. 3 is still present imperfection part, for example：1. data are returned
Biography signal is more to cause required return data line also more, such as to detect N root driving data lines, it is necessary to which N roots return number
According to line；2. cause data back signal which occupies the LED display modules data wire of about half more, may cause that band section product subtracts
It is small and cause physical interface to change.
The content of the invention
Therefore, to overcome defect present in prior art and deficiency, a kind of LED display modules management of present invention proposition is filled
Put.
Specifically, a kind of LED display modules managing device that the embodiment of the present invention is proposed, is suitably applied a kind of LED and shows
Show the microprocessor module of module, the LED display modules include that the first module input/output interface, module displays drive electricity
Road, the microprocessor module and the second module input/output interface, the first module input/output interface electrically connect institute
The input of module displays drive circuit and the first serial of the microprocessor module are stated, the second module input and output connect
The output end of the mouth electrical connection module displays drive circuit and the second serial of the microprocessor module, the microprocessor
Module electrically connects the output end of the module displays drive circuit by many holding wires.Wherein, the LED display modules
Managing device includes：Winding displacement detection module, for being timed many holding wires one by one as currently by the use of timer
Exterior interrupt connects the aerial lug of the first module input/output interface to detect with the presence or absence of abnormal, wherein described many
Root holding wire is to use timer to overflow interruption to switch one by one as current external interrupt source.
In one embodiment of the invention, the LED display modules managing device also includes：Point inspection module, for
When the LED display modules capture each of data clock signal when being in point inspection mode of operation using timer capture mode
Clock and often grab the electricity on the RGB data line during the clock pulses reads the once many holding wires
Level values, so as to obtain an inspection result data.
In an alternative of the invention, the LED display modules managing device also includes：Point inspection module, uses
In triggering reading by the use of data clock signal as exterior interrupt when the LED display modules are in point inspection mode of operation
The level value on RGB data line in many holding wires, so as to obtain an inspection result data.
In one embodiment of the invention, the LED display modules managing device also includes：Mould is programmed in the application
Block, the program to be updated for being received when the microprocessor module software reset starts from first serial input is carried out
Application program update and verification.
In one embodiment of the invention, the LED display modules managing device also includes：Serial ports cascade module, uses
Data transmission step by step is carried out in the first serial and/or the second serial is controlled.
In one embodiment of the invention, the LED display modules managing device also includes：Flash memory management module, uses
In flash memory in the piece in the microprocessor module using two memory blocks alternately rattle it is erasable by the way of record micro- place
Manage the run time of device module.
In one embodiment of the invention, the flash memory management module is additionally operable to using direct memory access module pair
The external flash memory of the microprocessor module carries out accessing operation.
In one embodiment of the invention, the LED display modules managing device also includes：Entitlement management module, uses
In when screen locking is enabled by the first serial receive from front end LED display control cards according to prefixed time interval periodically
The current time that sends simultaneously compares the current time for receiving and determines whether to perform screen locking with the screen locking time of storage
Operation.
In one embodiment of the invention, the entitlement management module is additionally operable to more than the prefixed time interval not
Screen locking operation is performed when receiving the current time.
In one embodiment of the invention, the LED display modules managing device also includes：Historic state records mould
Block, for using two memory blocks alternately rattle it is erasable by the way of in the external flash memory of the microprocessor module periodically
The work state information of the LED display modules is recorded, wherein the work state information includes the work of the LED display modules
Make temperature and/or operating voltage.
From the foregoing, it will be observed that the embodiment of the present invention is realized showing mould to LED by the innovation programming to microprocessor module
The intelligent management of group, and it is logical using serial ports between receiving card and LED display modules, LED display modules and LED display modules
Letter, thus can be used the i.e. achievable winding displacement detection of two holding wires, point inspection, IAP functions, operating temperature record, operating voltage to remember
Various functions such as record, flash memory management, empowerment management, scheme is succinct, save wire rod, save space.In addition, passing through microprocessor mould
The external flash memory of block, can also realize LED display modules correction data, the management of production information.
By the detailed description below with reference to accompanying drawing, other side of the invention and feature become obvious.But should know
Road, the accompanying drawing is only the purpose design explained, not as the restriction of the scope of the present invention.It should also be noted that unless another
Point out outward, it is not necessary to scale accompanying drawing, they only try hard to conceptually illustrate structure described herein and flow.
Brief description of the drawings
Below in conjunction with accompanying drawing, specific embodiment of the invention is described in detail.
Fig. 1 is a kind of configuration diagram of existing LED display modules condition detecting system.
Fig. 2 is the configuration diagram of existing another LED display modules condition detecting system.
Fig. 3 is the configuration diagram of existing another LED display module condition detecting system.
Fig. 4 is a kind of module diagram of LED display modules that the embodiment of the present invention is proposed.
Fig. 5 is a kind of high-level schematic functional block diagram of LED display modules managing device of the embodiment of the present invention.
Fig. 6 is a kind of LED display screen system that receiving card is coupled to including multiple LED display modules level of the embodiment of the present invention
Configuration diagram.
Fig. 7 divides schematic diagram for a kind of internal storage space of microprocessor module shown in Fig. 4.
Fig. 8 is a kind of flow chart of IAP of the embodiment of the present invention.
Fig. 9 is a kind of application checks flow chart of IAP of the embodiment of the present invention.
Figure 10 a, Figure 10 b and Figure 10 c are a kind of winding displacement overhaul flow chart of the LED display modules of the embodiment of the present invention.
Figure 11 is a kind of point inspection flow chart of the LED display modules of the embodiment of the present invention.
Specific embodiment
To enable the above objects, features and advantages of the present invention more obvious understandable, below in conjunction with the accompanying drawings to the present invention
Specific embodiment be described in detail.
Specifically, a kind of LED display modules 40 that the embodiment of the present invention is proposed include：First module input/output interface
41st, module displays drive circuit 43, the second module input/output interface 45, microprocessor module 47, temperature collection circuit 48a,
Voltage collection circuit 48b and flash memory 49.
First module input/output interface 41 is suitable to and LED display control cards (not drawn in Fig. 4) such as receiving card or preceding
Level LED display modules are connected, for example, connected by winding displacement.First module input/output interface 41 includes module input interface division
Divide and serial ports coupling part, wherein module input interface section is for example electrically connected by many RGB data lines and control signal wire
The input of module displays drive circuit 43, serial ports coupling part electrically connects the serial ports 1 of microprocessor module 47.
Module displays drive circuit 43 is used for one's own data and control in the data and control signal according to input
Signal drive control LED display modules 40 with carry multiple LED points shown and inspection mode of operation to described
Multiple LED points carry out error detection (namely the inspection of so-called lamp point point), and will belong to (the electrical connection of next stage LED display modules
To the LED display modules of the second module input/output interface 45) data and control signal export to the second module input and output
Interface 45.Preferably, module displays drive circuit 43 includes supporting the LED display drive chip of point checking functions.Herein, data and
Control signal is controlled including RGB data and data clock DCLK, latch signal LAT, enable signal OE, row decoding address signal etc.
Signal.
Second module input/output interface 45 is suitable to be connected with next stage LED display modules, for example, connected by winding displacement.
Second module input/output interface 45 includes module output interface part and serial ports coupling part, wherein module output interface part
The output end of module displays drive circuit 13, serial ports connecting portion are for example electrically connected by many RGB data lines and control signal wire
Divide the serial ports 2 of electrical connection microprocessor module 47.Here, serial ports 2 is used to be electrically connected with the serial ports 1 of next stage LED display modules.
Multiple I/O ports (I/O) of microprocessor module 47 electrically connect the described defeated of module displays drive circuit 43
Go out end.Microprocessor module 47 is for example equipped with arm processor, single-chip microcomputer, the field programmable logic device of multiple serial ports
Or the microprocessor such as CPLD (CPLD) (FPGA), it is also possible to be equipped with single serial ports microprocessor and
The combination of serial expanded circuit.In the present embodiment, the serial ports 1 and 2 is universal asynchronous receiving-transmitting (UART, Universal
Asynchronous Receiver/Transmitter) mouth.
Temperature collection circuit 48a for example includes thermistor equitemperature sensor, and it is used to gather LED display modules 40
Collection result is simultaneously supplied to microprocessor module 47 for the operating temperature of monitoring LED display modules 40 by operating temperature.
Voltage collection circuit 48b for example includes conventional voltage sampling circuit, and it is used to gather the defeated of LED display modules 40
Enter operating voltage and collection result is supplied to microprocessor module 47 for the input service voltage of monitoring LED display modules 40
It is whether abnormal.
The electrical connection microprocessor module 47 of flash memory 49 is electrically connected to the first module input/output interface 41 with by serial ports 1；
In this way, read/write operation of the LED display control cards such as receiving card to flash memory 49 can be by the serial ports with microprocessor module 47
1 interacts to realize；And serial ports 1 only needs to 2 holding wires, a holding wire, and string are even only needed in a half-duplex mode
Up to 6Mbps (or higher), compared to existing technologies, it can save holding wire quantity to the traffic rate of mouth.
Fig. 5 is referred to, the microprocessor module 47 of the present embodiment can realize a kind of LED display modules by programming
Managing device 470；Wherein, LED display modules managing device 470 includes：Serial ports cascade module 471, IAP (In
Application Programming, in the application program) module 472, winding displacement detection module 473, point inspection module 474, flash memory
The functional modules such as management module 475, entitlement management module 476 and historic state logging modle 477.
Serial ports cascade module 471 is used to realize LED display module cascade functions, so that LED display modules 40 can pass through
Serial ports 1 and serial ports 2 realize data forwarding, for example forwarding instruction, point inspection result data, program file to be updated etc., convenient connection.
As shown in fig. 6, LED display modules 40 can be connected in series (namely cascade) to receiving card 61 with random order, receiving card 61 leads to
Crossing serial ports can be communicated with each LED display module 40, flexibly and easily.It is micro- under the control action of serial ports cascade module 471
Processor module 47 can be communicated by serial ports 1 with upper level, and by serial ports 2 and next level communications, according in transmission agreement
Sequence number determine current read-write operation target LED display modules, when the serial number that each LED display module is received is non-zero, need
Sent after subtracting 1 by sequence number to next stage, when the serial number 0 for receiving, it is believed that operation target is current LED display modules.When
During serial number 0xFF, it is defined as broadcast and writes, the data penetration transmission that all LED display modules 40 are received is to next stage.In the present embodiment,
Sequence number is for example as the flag of data.Further, it is to be appreciated that when needing returned data, contrary operation is incremented by per one-level
Sequence number in the flag of the data for receiving is transmitted forward step by step with realizing data.As can be seen here, each LED display module 40
Microprocessor module 47 in need not allocate mutually different addressable address in advance, only respective addressable address need to be defaulted as sequence
Number 0, when the serial number in the flag of the data received from serial ports 1 is non-zero, then data are passed backward after subtracting 1 by sequence number,
And when the serial number in the flag of the data received from serial ports 2 is non-zero, then by data toward forward pass after adding 1 by sequence number, therefore respectively
Individual LED display modules 40 can be cascaded with random order.
IAP modules 472 are in order to preferably carry out subsequent upgrade and program version management, so that program can be by upper
Machine is updated, and facilitates subsequent upgrade.Because, in the product of exploitation, can there is BUG (program error) unavoidably, or
Modification program is may require that in order to increase new function, and the program Solidification of such as single-chip microcomputer of microprocessor module 47 is in chip
Portion, conventional when using, if necessary to more new procedures, then need by every chips and computer or programmable device couple together into
Line program is upgraded, and LED display erecting bed environment is complicated, is that ROMPaq brings huge difficulty；In order to solve this
One problem, in the programming of microprocessor module 47, increased IAP functions, as long as such user uses PC control
Sending card (namely a kind of LED display control cards), program file to be updated is sent to LED display modules 40, LED display moulds
The program before the meeting auto-erasing of IAP modules 472 in the microprocessor module 47 of group 40, and it is updated to newest program.Fig. 7
For a kind of internal storage space of microprocessor module 47 divides schematic diagram, and IAP modules are by the program code in Boot codes
Realize.
Fig. 8 is a kind of flow chart of IAP of the present embodiment.Specifically, as shown in figure 8, after system electrification, can first run
Boot codes, check whether current be hardware reset in Boot code runnings using IAP modules 472, when above to reply by cable
When position starts (namely hardware reset), the correctness of the application code in meeting check sheet in flash memory, if application checks
It is correct then jump to application area (namely the application program that brings into operation)；When be not hardware reset but software reset (by with
Triggered during the more new application of family) when, then can rest in Boot programs, wait to be received and write application program, when application journey
Sequence write-in finish after, by application program be transmitted to next stage LED display modules enter for it line program upgrading be used and to having write
Complete application program is verified, if verification is correct, jumps to application area, else if verification failure, then return
To etc. it is to be received and write application program step.
Fig. 9 is a kind of application checks flow chart of IAP of the present embodiment.As shown in figure 9, in IAP realizations, in order to
Ensure that program transportation is errorless, can be verified in program header, tail increase flag bit (frame head, postamble in Fig. 7), and calculating and and true
Protect and verify and errorless.
Winding displacement detection module 473 is in order to realize winding displacement detection function, specially by the outlet side of LED display modules 40
All holding wires include the control signal wire such as RGB data line and data clock signal DCLK, latch signal LAT, enable signal OE
Such as single-chip microcomputer of microprocessor module 47 is connected to, using whether triggering generation external interrupt and judge whether to have electricity on holding wire
Flat signal intensity.In winding displacement detection process, due to needing to check that each level of holding wire changes, and the electricity on holding wire
Flat change is too fast compared to speed for such as single-chip microcomputer of microprocessor module 47, according to the mode of I/O inputs, runs into pulse
, can there is missing inspection in narrow signal, therefore the present embodiment checks that rising, the change of trailing edge determine using external interrupt mode
Whether signal is had, and detection whereby is connected to the aerial lug of the first module input/output interface 41 with the presence or absence of abnormal.Additionally, by
RGB data line and control signal wire are had in holding wire, quantity is more, if all holding wires are all allowed to touch within the same time
Hair is interrupted, and single-chip microcomputer can be caused to be constantly in interruption, it is impossible to is processed other things, or even is crashed, influences performance and stability；
Therefore the present embodiment in certain time period, is had and only one holding wire is used as outside using the method for time-sharing interrupt sampling
Interrupt source (or interrupt line), can thus be effectively prevented from above mentioned problem.Specifically, the winding displacement as shown in Figure 10 a-10c
Overhaul flow chart, in winding displacement detection process, can start timer and be timed with exchange-column shift interrupt line, as shown in Figure 10 a；
If the triggering of Current interrupt source generates external interrupt, according to the signal that Current interrupt line is connected, result data is recorded
Enter internal memory with characterize correspondence Current interrupt line connect signal winding displacement normally, as shown in fig. lob；, whereas if until producing
Timer overflows to interrupt and does not still trigger generation external interrupt, then it represents that the winding displacement that correspondence Current interrupt line connects signal is different
Often, and after producing timer to overflow interruption, Current interrupt line to next interrupt line (as shown in figure l0c) and timing is switched
Think highly of New count and continue to determine whether that triggering generates external interrupt, so circulation, until all of holding wire is made
Untill being detected once for interrupt line.Herein it is noted that winding displacement detection can be that electricity is opened on microprocessor module 47
Carried out automatically after dynamic, naturally it is also possible to carried out by artificial triggering.
The point that point inspection module 474 is used for LED display modules 40 is examined.As shown in figure 11, the present embodiment is caught using timer
Function is obtained, each data clock DCLK is captured, and reads every group of rgb signal of data, to realize the lamp point after winding displacement detection
Point checking functions.Point checking functions need and receiving card coordinates, and when reception card start-up point is examined, an inspection instruction can be issued, by serial ports
It is sent to each LED display module 40 (referring to Fig. 6) of cascade, the point inspection module of such as single-chip microcomputer of microprocessor module 47
474 can stop winding displacement detection when receiving inspection instruction, start timer capture function, capture each data clock DCLK
(namely each clock pulses in crawl data clock signal DCLK), timer capture is triggered when a DCLK is often caught
Interrupt and known on each group RGB data line by reading the I/O ports being connected with RGB data line of microprocessor module 47
Level value, so as to obtain an inspection result data.It is noted that using timer capture mode, than the side being input into using I/O
Formula is more accurate, will not miss a clock；Certainly, similar effect can also be reached using external interrupt mode, but due to
The detection of foregoing winding displacement has used external interrupt, and succinct understandable for program, point inspection is realized using timer capture function, if
The microprocessor module 47 of use does not have timer capture function, then can use external interrupt to replace, such as using data clock
The rising edge of DCLK is used as the exterior interrupt during an inspection.
Flash memory management module 475 can be used to be managed the flash memory inside microprocessor module 47.In the present embodiment, make
With information such as flash memory storage in piece ID, run times (referring to Fig. 7), can be without external flash chip.Further, since flash memory
There are life problems, in order to solve life problems caused by continuous erasable run time, flash memory management module 475 sets in program
Two memory blocks are used alternately to rattle on meter erasable, effectively to increase the service life.Specifically, microprocessor module 47 is for example single
Need in piece to be read on flash memory the operation time of last time storage on piece machine after electricity, and for example according to it is per minute once
Frequency is sequentially written in current flash page；After page A writes, wipe page B and write to page B, page A is wiped after page B writes, according to
Secondary circulation.8 byte run time data are for example write every time, wherein 4 bytes are used for representing data validity.It is run time point
The memory space matched somebody with somebody is, for example, page two, and every page of size is 1KB, can store 128 time datas.
Additionally, the outer flash memory 49 of piece is managed by the flash memory management module 475 of such as single-chip microcomputer of microprocessor module 47 may be used also
To provide stability and speed higher.Specifically, by the outer flash memory 49 of hardware SPI interface connection sheet of microprocessor module 47,
And using DMA ((Direct Memory Access, direct memory access) module come increase read-write gap and efficiency of transmission,
The calculating consumption to microprocessor module 47 is reduced, while having ensured the accurate of data by agreement transmission information with receiving card
Property.Additionally, using the outer flash memory 49 of piece, user can store a large amount of information for being relevant to LED display modules 40, such as historic state,
Correction data, lamp plate property parameters etc., and can realize reading the information for wherein storing by receiving card after electricity, change itself
Parameter, reaches and exempts from user configuring operation, and electric screen is bright in realization.
Entitlement management module 476 is used to realize authorizing screen locking function, solves LED display modules lease (or lamp plate lease)
When various problems.Authorization data (referring to Fig. 7) includes screen locking enable and screen locking time, when screen locking function is enabled, it is necessary to logical
Specific front end LED display control cards such as sending card is crossed to standard time of transmission, microprocessor in serial ports such as 30 seconds
The entitlement management module 476 of such as single-chip microcomputer of module 47 can compare the current time for receiving and determine with the screen locking time of storage
Whether screen locking is needed, such as in the screen locking time consistency of the current time and storage that receive, then performs screen locking operation, so that
Obtain the no longer normal display of LED display module 40, such as blank screen.Furthermore it is preferred that when the standard time was not received more than 30 seconds,
Meeting screen locking at once, can so avoid malice from changing front end LED display control cards to escape mandate.
Historic state logging modle 477 is used to realize the historic state writing function of LED display modules 40, and it is by data
After biography, the situations such as voltage, the temperature of LED display modules 40 of such as nearest 2 hours can be checked by host computer, facilitate problem to arrange
Look into, also allow user more accurately to understand the working condition of LED display modules 40.Specifically, microprocessor module 47 is (such as single
Piece machine) storage one action voltage for example per minute, operating temperature value in the outer flash memory 49 of piece, 8 bytes of storage every time, wherein high
4 bytes are data sequence number, and low 4 byte is history information data.It is similar with foregoing clocking capability (record run time), using two
Individual memory block is alternately rattled erasable, and on microprocessor module 47 after electricity, historic state logging modle 477 is needed in the outer flash memory 49 of piece
The upper positional value for reading last time storage, and for example write to current flash sector order according to frequency once per minute,
After sector A writes, wipe sector B and write to sector B, sector A is wiped after sector B writes, circulate successively.
In sum, the embodiment of the present invention is realized showing mould to LED by the innovation programming to microprocessor module
The intelligent management of group, and it is logical using serial ports between receiving card and LED display modules, LED display modules and LED display modules
Letter, thus can be used the i.e. achievable winding displacement detection of two holding wires, point inspection, IAP functions, operating temperature record, operating voltage to remember
Various functions such as record, flash memory management, empowerment management, scheme is succinct, save wire rod, save space.Furthermore, by microprocessor mould
Block cooperated with LED display screen control system (such as host computer+sending card+receiving card) can realize every shape of LED display modules
State is such as：The monitoring of winding displacement state, point inspection, operating temperature, operating voltage or other information.In addition, passing through microprocessor module
External flash memory, can also realize LED display modules correction data, the management of production information.
The above, is only presently preferred embodiments of the present invention, and any formal limitation is not made to the present invention, though
So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention, any to be familiar with this professional technology people
Member, without departing from the scope of the present invention, when making a little change or modification using the technology contents of the disclosure above
It is the Equivalent embodiments of equivalent variations, as long as being without departing from technical solution of the present invention content, according to technical spirit pair of the invention
Any simple modification, equivalent variations and modification that above example is made, still fall within the range of technical solution of the present invention.
Claims (10)
1. a kind of LED display modules managing device, is suitably applied a kind of microprocessor module of LED display modules, the LED
Display module includes the first module input/output interface, module displays drive circuit, the microprocessor module and the second mould
Group input/output interface, the first module input/output interface electrically connects input and the institute of the module displays drive circuit
The first serial of microprocessor module is stated, the second module input/output interface electrically connects the module displays drive circuit
The second serial of output end and the microprocessor module, the microprocessor module electrically connects the mould by many holding wires
The output end of group display driver circuit；Characterized in that, the LED display modules managing device includes：
Winding displacement detection module, for being timed many holding wires one by one as current external interrupt source by the use of timer
The aerial lug of the first module input/output interface is connected to detect with the presence or absence of abnormal, wherein many holding wires are
Overflow to interrupt using timer and switch one by one as current external interrupt source；
Wherein, it is described to be timed many holding wires one by one as current external interrupt source come the company of detection by the use of timer
The aerial lug for connecing the first module input/output interface includes with the presence or absence of abnormal：If current external interrupt source connects letter
Number level change triggers generate external interrupt, then signal record result data is connected with table according to current external interrupt source
Levy correspondence current external interrupt source connect signal aerial lug it is normal；If otherwise being interrupted still until producing timer to overflow
External interrupt is produced without triggering, then judges that correspondence current external interrupt source connects the aerial lug exception of signal.
2. LED display modules managing device as claimed in claim 1, it is characterised in that the LED display modules managing device
Also include：
Point inspection module, for capturing number using timer capture mode when the LED display modules are in point inspection mode of operation
According to clock signal each clock pulses and often grab the clock pulses and read the once many holding wires
In RGB data line on level value, so as to obtain an inspection result data.
3. LED display modules managing device as claimed in claim 1, it is characterised in that the LED display modules managing device
Also include：
Point inspection module, for when the LED display modules are in point inspection mode of operation by the use of data clock signal as outside
Interrupt source triggers the level value on the RGB data line for reading in many holding wires, so as to obtain an inspection result data.
4. LED display modules managing device as claimed in claim 1, it is characterised in that the LED display modules managing device
Also include：
Programming module in the application, for receiving defeated from the first serial when the microprocessor module software reset starts
The program to be updated for entering carries out application program update and verification.
5. LED display modules managing device as claimed in claim 1, it is characterised in that the LED display modules managing device
Also include：
Serial ports cascade module, transmits for controlling the first serial and/or the second serial to carry out data step by step.
6. LED display modules managing device as claimed in claim 1, it is characterised in that the LED display modules managing device
Also include：
Flash memory management module, it is erasable for alternately being rattled using two memory blocks in flash memory in the piece of the microprocessor module
Mode record the run time of the microprocessor module.
7. LED display modules managing device as claimed in claim 6, it is characterised in that the flash memory management module is additionally operable to
Accessing operation is carried out to the external flash memory of the microprocessor module using direct memory access module.
8. LED display modules managing device as claimed in claim 1, it is characterised in that the LED display modules managing device
Also include：
Entitlement management module, is pressed for being received by the first serial when screen locking is enabled from front end LED display control cards
The current time periodically sent according to prefixed time interval and the screen locking time for comparing the current time for receiving and storage
Determine whether to perform screen locking operation.
9. LED display modules managing device as claimed in claim 8, it is characterised in that the entitlement management module is additionally operable to
Screen locking operation is performed when the current time is not received more than the prefixed time interval.
10. LED display modules managing device as claimed in claim 1, it is characterised in that the LED display modules management dress
Putting also includes：
Historic state logging modle, for using two memory blocks alternately rattle it is erasable by the way of in the microprocessor module
The work state information of the LED display modules is periodically recorded in external flash memory, wherein the work state information includes
The operating temperature and/or operating voltage of the LED display modules.
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| CN201510836378.XA CN105357799B (en) | 2015-11-26 | 2015-11-26 | LED display module managing devices |
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| CN201510836378.XA CN105357799B (en) | 2015-11-26 | 2015-11-26 | LED display module managing devices |
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| CN105357799B true CN105357799B (en) | 2017-06-20 |
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| CN106157888A (en) * | 2016-08-31 | 2016-11-23 | 深圳市灵星雨科技开发有限公司 | A kind of SOM display control program |
| CN106338941A (en) * | 2016-09-13 | 2017-01-18 | 深圳市洲明科技股份有限公司 | Monitoring system of LED display screen and monitoring method thereof |
| CN109841184A (en) * | 2019-04-04 | 2019-06-04 | 郑州新双恒信息技术有限公司 | A kind of LED control card of both-way communication and the composite structure of LED unit plate |
| KR20210019900A (en) * | 2019-08-13 | 2021-02-23 | 삼성전자주식회사 | Display apparatus and control method thereof |
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| CN103533727A (en) * | 2013-10-12 | 2014-01-22 | 西安诺瓦电子科技有限公司 | LED (light-emitting diode) light panel and LED display screen system |
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| KR101109890B1 (en) * | 2010-07-12 | 2012-02-14 | 대구도시철도공사 | Led module tester |
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| CN102708772B (en) * | 2012-06-25 | 2015-08-05 | 西安诺瓦电子科技有限公司 | A kind of LED display condition detection method |
| CN104795025B (en) * | 2015-04-29 | 2017-10-17 | 西安诺瓦电子科技有限公司 | LED display modules and its condition detection method |
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| CN102750896A (en) * | 2012-06-25 | 2012-10-24 | 西安诺瓦电子科技有限公司 | LED (light-emitting diode) display screen status detection device and detection method |
| CN103533727A (en) * | 2013-10-12 | 2014-01-22 | 西安诺瓦电子科技有限公司 | LED (light-emitting diode) light panel and LED display screen system |
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