CN104795025B - LED display modules and its condition detection method - Google Patents
LED display modules and its condition detection method Download PDFInfo
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- CN104795025B CN104795025B CN201510214691.XA CN201510214691A CN104795025B CN 104795025 B CN104795025 B CN 104795025B CN 201510214691 A CN201510214691 A CN 201510214691A CN 104795025 B CN104795025 B CN 104795025B
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Abstract
The present invention relates to a kind of LED display modules and its condition detection method.LED display module includes：Module displays drive circuit；Microprocessor module, with a first serial and multiple I/O ports；First module input/output interface, including module input interface section and first serial part, module input interface section electrically connect the input of module displays drive circuit, and first serial part electrically connects the first serial of microprocessor module；Multiple I/O ports of microprocessor module electrically connect the output end of module displays drive circuit.The present invention can realize every state-detection of LED display modules by circuit design, without extra configuration monitoring card and can increase the intelligent of LED display modules.
Description
Technical field
The present invention relates to technical field of LED display, more particularly to a kind of LED display modules and a kind of LED display modules
Condition detection method.
Background technology
Include in existing light emitting diode (light emitting diode, LED) display screen display control program：
Card and LED display modules are received, wherein LED display is formed by multiple box body splicings, and each casing is by multiple LED lamp panels
It is spliced.Be provided with memory in traditional LED display modules, be written and read by reception card, realize lamp plate correction coefficient,
The management of the items module information such as production information, connects to realize to use in correction data and production information management, traditional approach
The memory for blocking and directly being accessed by SPI interface or I2C interfaces in LED display modules is received, there is control line using SPI interface many
The problem of (SPI interface need 4 signal wires, such as need lamp plate cascade also need additionally to increase by two addressing lines), use I2C interface controls
Line processed can less slightly (I2C interfaces need 2 signal wires, such as need lamp plate cascade also to need additionally to increase by two addressing lines), but I2C interfaces
Traffic rate it is relatively low (be usually 400kbps).
Refer to and flash storage is provided with the LED display modules in Fig. 1, traditional scheme, receive card defeated by module
Incoming interface is written and read to memory, realizes the management of every module information such as lamp plate correction coefficient, production information.Module is exported
Interface connects the module input interface of another LED display modules, to realize cascade.In addition, traditional scheme in order to realize winding displacement examine
Survey and error detection (the point inspection of LED point) needs to use monitor card, the display drive signals of end module are collected and selected back
Reach reception card, its space-consuming and increase cost.In addition, the LED display modules in traditional scheme can not monitor module
State information such as temperature and voltage, causes its intelligent not enough.
The content of the invention
Therefore, for deficiency of the prior art, the present invention proposes that a kind of LED display modules and a kind of LED show mould
The condition detection method of group.
Specifically, a kind of LED display modules provided in an embodiment of the present invention, it includes：Module displays drive circuit；Micro- place
Device module is managed, with a first serial and multiple I/O ports；First module input/output interface, including module input connect
Oral area point and first serial part, the module input interface section electrically connect the input of the module displays drive circuit with
For input data and control signal to the module displays drive circuit, the first serial part electrically connects the microprocessor
The first serial of device module；Wherein, the multiple I/O port of the microprocessor module electrically connects the module
Data and control signal that the output end of display driver circuit exports for the reception module displays drive circuit.In addition,
The microprocessor module is used to detect the data of the module displays drive circuit output and the validity of control signal to sentence
Whether the connection state for the module input interface section of breaking is abnormal, and/or for being in the module displays drive circuit
Obtained in the data and control signal that are exported during point inspection mode of operation from the module displays drive circuit and mould is shown to the LED
Group carries out the point inspection result data of point inspection with the multiple LED points carried and stored.
In one embodiment of the invention, above-mentioned microprocessor module also has a second serial, and above-mentioned LED shows mould
Group also includes the second module input/output interface, and the second module input/output interface includes module output interface part and the
Two serial ports parts, the module output interface part electrically connects the output end of the module displays drive circuit to connect
The data and control signal of the module displays drive circuit output are received, the second serial part electrically connects the microprocessor
The second serial of module.
In one embodiment of the invention, above-mentioned first serial and second serial be universal asynchronous receiving-transmitting (UART,
Universal Asynchronous Receiver/Transmitter) mouth.
In one embodiment of the invention, above-mentioned microprocessor module includes ARM (Advance RISC Machine)
Processor, single-chip microcomputer or field programmable logic device (FPGA, Field Programmable Gate Array).
In one embodiment of the invention, above-mentioned first module input/output interface and the second module input/output interface
It is winding displacement interface.
In one embodiment of the invention, above-mentioned LED display modules also include：Flash memory, electrically connects the microprocessor
Module by the first serial to be electrically connected to the first module input/output interface.
In one embodiment of the invention, above-mentioned LED display modules also include：Temperature collection circuit and voltage acquisition electricity
Road, is respectively electrically connected to the microprocessor module；The temperature collection circuit is used to enter trip temperature to the LED display modules
Gather to detect the operating temperature of the LED display modules；The voltage collection circuit is used to gather the LED displays mould
Whether the input service voltage of group is abnormal for the input service voltage for detecting the LED display modules.
In addition, a kind of condition detection method of LED display modules provided in an embodiment of the present invention, aobvious applied to a kind of LED
Show control system, the LED display control programs include the LED display modules and connect the LED displays mould by winding displacement
The LED display control cards of group；The LED display modules include：Module displays drive circuit, microprocessor module and the first mould
Group input/output interface；The microprocessor module has a first serial and multiple I/O ports, and first module is defeated
Enter output interface and electrically connect the first serial of the microprocessor module and the input of the module displays drive circuit,
And the multiple I/O port of the microprocessor module electrically connects the output end of the module displays drive circuit.
The condition detection method includes step：(a) received by first input/output interface and come from the LED display control cards
Data and control signal；(b) obtained in the data received and control signal and belonged to by the module displays drive circuit
The multiple LED points carried in the data and control signal of oneself to the LED display modules band carry out display driving；(c) pass through
The microprocessor module is inputted to the output end from the module displays drive circuit to the multiple I/O port
Data and control signal carry out validation checking to judge between the LED display control cards and the LED display modules
Whether winding displacement connection is abnormal；And (d) by the first serial of the microprocessor module by the judgement knot in step (c)
Fruit is sent to the LED display control cards via the first module input/output interface.
In one embodiment of the invention, above-mentioned condition detection method also includes step：It is defeated by the described first input
Module displays drive circuit inlet point inspection mode of operation described in the data and control signal drive control of outgoing interface input, with to institute
State multiple LED points progress point inspection of LED display modules band load and output point examines result data to the microprocessor module
The multiple I/O port；And provided by the first serial of the LED display control cards and the microprocessor module
The point inspection result data of storage is sent to institute by the instruction control microprocessor module to the microprocessor module
State LED display control cards.
In one embodiment of the invention, above-mentioned condition detection method also includes step：Pass through the LED display controls
The first serial of card and the microprocessor module is supplied to the instruction of the microprocessor module to control the microprocessor mould
Temperature detection result and/or input service voltage detecting that block will be obtained by temperature collection circuit and/or voltage collection circuit
As a result the LED display control cards are sent to.
The embodiment of the present invention can realize every state of LED display modules such as by circuit design：Winding displacement state, mistake
The detection of detecting (point inspection), temperature, input service voltage or other information by mistake, without extra configuration monitoring card and can increase LED
Display module it is intelligent.In addition, by the way that flash memory is connected into microprocessor module, less letter can be used using serial communication
Number line realizes the management of module correction data, production information or other information.
By the detailed description below with reference to accompanying drawing, other side and feature of the invention becomes 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, because it should refer to
Appended claims.It should also be noted that unless otherwise noted, it is not necessary to scale accompanying drawing, they only try hard to concept
Ground illustrates structure described herein and flow.
Brief description of the drawings
Below in conjunction with accompanying drawing, the embodiment to the present invention is described in detail.
Fig. 1 is the structural representation of tradition LED display modules.
Fig. 2 is the configuration diagram of the LED display control programs comprising LED display modules of the preferred embodiment of the present invention.
Embodiment
In order to facilitate the understanding of the purposes, features and advantages of the present invention, below in conjunction with the accompanying drawings to the present invention
Embodiment be described in detail.
Fig. 2 is referred to, in a kind of LED display control programs that the preferred embodiment of the present invention is provided, every LED shows mould
10 (one is only shown in Fig. 2) of group include：First module input/output interface 11, module displays drive circuit 13, the second module
Input/output interface 15, microprocessor module 17, temperature collection circuit 18a, voltage collection circuit 18b and flash storage
(flash memory) 19；Specifically：
First module input/output interface 11 is suitable to be connected with LED display control cards or prime LED display modules, for example
Connected by winding displacement.First module input/output interface 11 includes module input interface section and serial ports part, and wherein module is defeated
The input of incoming interface part electrical connection module displays drive circuit 13, serial ports part electrically connects the serial ports of microprocessor module 17
1。
Module displays drive circuit 13 is used for one's own data and control in data and control signal according to input
Signal drive control LED display modules 10 with carry multiple LED points shown and examine 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 rear class LED display modules and (be electrically connected to
The LED display modules of second module input/output interface 15) data and control signal export to the second module input and output and connect
Mouth 15.Preferably, module displays drive circuit 13 includes supporting the LED display drive chip of point checking functions.Herein, data and control
Signal processed includes the control signal such as RGB data signal and clock signal clk, latch signal LAT, polarity selection signal OE.
Second module input/output interface 15 is suitable to be connected with rear class LED display modules, for example, connected by winding displacement.The
Two module input/output interfaces 15 include module output interface part and serial ports part, and wherein module output interface part is electrically connected
The output end of module displays drive circuit 13, serial ports part electrically connects the serial ports 2 of microprocessor module 17.Here, serial ports 2 is used for
Electrically connected with the serial ports 1 of rear class LED display modules.
Multiple I/O ports (I/O) of microprocessor module 17 electrically connect the described defeated of module displays drive circuit 13
Go out end.The microprocessor that microprocessor module 17 is for example equipped with multiple serial ports is for example configured with the ARM processing of multiple serial ports
Device, single-chip microcomputer or field programmable logic device (FPGA) or microprocessor and the serial ports expansion for being configured with single serial ports
Open up the combination of 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 18a is for example including thermistor equitemperature sensor, and it is used to gather LED display modules 10
Collection result simultaneously is supplied to microprocessor module 17 to detect the operating temperature of LED display modules 10 by operating temperature.
Voltage collection circuit 18b is for example including conventional voltage sampling circuit, and it is used to gather the defeated of LED display modules 10
Enter operating voltage and be supplied to microprocessor module 17 to detect the input service voltage of LED display modules 10 by collection result
It is whether abnormal.
Flash storage 19, namely flash memory, it electrically connects microprocessor module 17 to be electrically connected to first by serial ports 1
Module input/output interface 11；In this way, read/write operation of the LED display control cards to flash storage 19 can by with micro- place
The serial ports 1 of reason device module 17 interacts to realize；And serial ports 1 only needs to 2 signal wires, even one is only needed in a half-duplex mode
Individual signal wire, and serial ports traffic rate up to 6Mbps (or higher), compared to flash memory is connected directly into mould shown in Fig. 1
For the prior art of group input interface, it can save signal wire quantity.
Describe the operation principle and process of LED display modules in detail below in conjunction with Fig. 2：
(i) (LED display control cards usually receive card or scanned the upper level control unit of LED display modules 10
Card) there is serial communication protocol with the microprocessor module in LED display modules.When multiple LED display modules cascade in use, by
There are two serial ports to connect the He of the first module input/output interface 11 respectively in the microprocessor module 17 in each LED display modules
Second module input/output interface 15, microprocessor module 17 can realize the cascaded transmission of serial data, upper one by program
Level control unit (LED display control cards) can access the microprocessor module 17 of each LED display modules.
(ii) microprocessor module 17 in LED display modules can be according to from described in module displays drive circuit 13
Output end, which is inputted to the validation checking of the data of its multiple I/O port (I/O) and control signal, judges LED display modules
Whether the winding displacement connection status between LED display control cards or between prime LED display modules is abnormal, for example, work as detection
Logical zero is continuously within a certain period of time to some I/O mouthfuls of signal or logical one is continuously, then can judge winding displacement accordingly
In corresponding with the I/O mouthfuls signal wire of certain root to there is open circuit etc. abnormal；Herein it is understood that because data and control are believed
The logic arrangement of each signal in number is typically to meet certain rule, therefore can in advance be deposited in microprocessor module 17
Some abnormal signal situations are stored up, when carrying out signal validation checking if it find that these abnormal cases, then can judge row accordingly
Line connection status is abnormal.
(iii) support the LED of point checking functions is shown to drive when the module displays drive circuit 13 in LED display module includes
Dynamic chip, module display driver circuit is triggered by some specific time sequence of the control signal in the data and control signal of input
13 inlet points examine mode of operation when, module displays drive circuit 13 can to LED display modules 10 institute with load multiple LED points
Carry out point inspection and result data examined to multiple I/O ports (I/O) of microprocessor module 17 by its output end output point,
Received by microprocessor module 17 and store an inspection result data.Herein, for example represented in point inspection result data with binary zero
LED point failure, it is normal that binary one represents LED point.In addition, LED point herein can be red LED, green LED,
Blue led, other color LED or its any combination.
(iv) microprocessor module 17 in LED display modules can pass through temperature collection circuit 18a, voltage collection circuit
18b realizes the collection of the signals such as temperature, the input service voltage to LED display modules 10 respectively, passes through the temperature to collecting
The temperature detection to LED display modules 10 can be achieved in the judgement of signal, passes through sentencing for the input service voltage signal to collecting
The stability of the disconnected input service voltage that detection LED display modules 10 can be achieved.
(v) microprocessor module 17 in LED display modules can (LED shows by the reception upper level of serial ports 1 control unit
Show control card) instruction sent perform winding displacement testing result, error-detection result (point inspection result data), temperature detection result with
And the passback of voltage detecting result, or by the read/write to outside flash storage 19 to realize the school of LED display modules 10
The read/write of correction data, production information and other information, reaches the purpose of information management whereby.
In addition, can be drawn from above-mentioned operation principle and process, the LED display modules 10 of the present embodiment can realize winding displacement
The state inspection of the LED display modules such as detection, LED point point inspection (error detection), temperature detection and/or input service voltage detecting
Survey, particular state detection process may be referred to the operation principle of foregoing LED display modules 10 and the narration part of process, herein not
Repeat again.
In other embodiments, LED display modules 10 can also be saved in the case of need not cascade rear class LED display modules
Slightly the second module input/output interface 15；Correspondingly, microprocessor module 17 can also omit serial ports 2.
In summary, the above embodiment of the present invention can realize every state ratio of LED display modules by circuit design
Such as：Winding displacement state, error detection (point inspection), temperature, the detection of input service voltage or other information, without extra configuration monitoring
Block and the intelligent of LED display modules can be increased.In addition, by the way that flash memory is connected into microprocessor module, utilizing serial communication
The management of module correction data, production information or other information can be realized with less signal wire.
So far, specific case used herein is to a kind of LED display modules of the present invention and its condition detection method
Principle and embodiment are set forth, and the explanation of above example is only intended to the method and its core for helping to understand the present invention
Thought；Simultaneously for those of ordinary skill in the art, according to the thought of the present invention, in embodiment and application
On will change, in summary, this specification content should not be construed as limiting the invention, protection model of the invention
Enclosing should be defined by appended claim.
Claims (9)
1. a kind of LED display modules, including module displays drive circuit；Characterized in that, also including：
Microprocessor module, with a first serial, a second serial and multiple I/O ports；
First module input/output interface, including module input interface section and first serial part, the module input interface
Part electrically connects the input of the module displays drive circuit for input data and control signal to the module displays
Drive circuit, the first serial part electrically connects the first serial of the microprocessor module；
Second module input/output interface, including module output interface part and second serial part, the module output interface
Part electrically connects the output end of the module displays drive circuit to receive the number of the module displays drive circuit output
According to and control signal, the second serial part electrically connects the second serial of the microprocessor module；
Wherein, the multiple I/O port of the microprocessor module electrically connects the institute of the module displays drive circuit
Output end is stated to receive the data and control signal of the module displays drive circuit output；
The microprocessor module is used for data and the control for the output end output for detecting the module displays drive circuit
The validity of signal with judge between the module input interface section and LED display control cards or with prime LED show mould
Whether connection state between group abnormal, and/or for when the module displays drive circuit is in point inspection mode of operation from
Obtained in the data and control signal of the output end output of the module displays drive circuit to the LED display modules band
The multiple LED points carried carry out the point inspection result data of point inspection and stored.
2. LED display modules as claimed in claim 1, it is characterised in that the first serial and the second serial are
Universal asynchronous receiving-transmitting (UART) mouth.
3. LED display modules as claimed in claim 1, it is characterised in that the first module input/output interface and described
Second module input/output interface is winding displacement interface.
4. LED display modules as claimed in claim 1, it is characterised in that the microprocessor module include arm processor,
Single-chip microcomputer or field programmable logic device (FPGA).
5. LED display modules as claimed in claim 1, it is characterised in that also include：Flash memory, electrically connects the microprocessor
Module by the first serial to be electrically connected to the first module input/output interface.
6. LED display modules as claimed in claim 1, it is characterised in that also include：Temperature collection circuit and voltage acquisition electricity
Road, is respectively electrically connected to the microprocessor module；The temperature collection circuit is used to enter trip temperature to the LED display modules
Gather to detect the operating temperature of the LED display modules；The voltage collection circuit is used to gather the LED displays mould
Whether the input service voltage of group is abnormal for the input service voltage for detecting the LED display modules.
7. a kind of condition detection method of LED display modules, applied to a kind of LED display control programs, the LED display controls
System includes the LED display modules and the LED display control cards of the LED display modules is connected by winding displacement, and the LED shows
Show that module includes module displays drive circuit, microprocessor module, the first module input/output interface and the input of the second module
Output interface；The microprocessor module has a first serial, a second serial and multiple I/O ports, described first
Module input/output interface electrically connects the first serial and the module displays drive circuit of the microprocessor module
Input, the second module input/output interface electrically connects the second serial and the module of the microprocessor module
The output end of display driver circuit, the multiple I/O port of the microprocessor module electrically connects the module displays
The output end of drive circuit, so that the multiple I/O port of the microprocessor module and second module
Input/output interface is all connected with the output end of the module displays drive circuit；The condition detection method includes step：
(a) data and control signal from the LED display control cards are received by the first module input/output interface；
(b) by the module displays drive circuit obtain receive the data and control signal in one's own data and
Multiple LED points that control signal is carried to the LED display modules band carry out display driving；
(c) output end from the module displays drive circuit is inputted to the multiple by the microprocessor module
The data and control signal of I/O port carry out validation checking to judge that the LED display control cards and the LED are shown
Whether the winding displacement connection between module is abnormal；And
(d) by the first serial of the microprocessor module by the judged result in step (c) via first mould
Group input/output interface is sent to the LED display control cards.
8. condition detection method as claimed in claim 7, it is characterised in that also including step：
Module displays described in the data and control signal drive control inputted by the first module input/output interface drive
Circuit inlet point examines mode of operation, carries out point inspection with the multiple LED points carried to the LED display modules band and output point inspection is tied
Fruit data to the microprocessor module the multiple I/O port；
The microprocessor module is supplied to by the first serial of the LED display control cards and the microprocessor module
The point inspection result data of storage is sent to the LED display control cards by the instruction control microprocessor module.
9. condition detection method as claimed in claim 7, it is characterised in that also including step：
The microprocessor module is supplied to by the first serial of the LED display control cards and the microprocessor module
The temperature detection result that the instruction control microprocessor module will be obtained by temperature collection circuit and/or voltage collection circuit
And/or input service voltage detecting result is sent to the LED display control cards.
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| CN105047135A (en) * | 2015-08-20 | 2015-11-11 | 西安诺瓦电子科技有限公司 | Lamp panel module group, box body, and LED display screen system |
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