CN104112413B - LED display bad point point detection system - Google Patents
LED display bad point point detection system Download PDFInfo
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- CN104112413B CN104112413B CN201310133211.8A CN201310133211A CN104112413B CN 104112413 B CN104112413 B CN 104112413B CN 201310133211 A CN201310133211 A CN 201310133211A CN 104112413 B CN104112413 B CN 104112413B
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- 238000001514 detection method Methods 0.000 title claims abstract description 42
- 238000013480 data collection Methods 0.000 claims abstract description 31
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- 238000012545 processing Methods 0.000 claims abstract description 12
- 238000004891 communication Methods 0.000 claims description 8
- 230000008054 signal transmission Effects 0.000 abstract description 4
- 230000006870 function Effects 0.000 description 13
- 230000002708 enhancing effect Effects 0.000 description 3
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Abstract
The present invention relates to LED display detection technique field, particularly to a kind of LED display bad point point detection system.In this LED display bad point point detection system, use data collection module to collect and strengthen the data of the constant-current LED driving chip institute spot check with full frame error detection function of mourning in silence in real time, spot check module the data that data collection module transmits are intercepted after batch processing, store and collect, using RS485 bus to be transmitted afterwards, main control module receives the spot check module data by RS485 bus transfer.The advantage utilizing RS485 bus transfer signal, the LED display bad point point detection system that therefore present invention provides, there is long transmission distance, the advantage of steady signal transmission, its data transmitted can correctly feed back the bad point quantity in LED display, coordinate.
Description
Technical field
The present invention relates to LED display detection technique field, particularly to a kind of LED display bad point spot check
System.
Background technology
At present, LED display has been applied in large board.LED display is by thousands of LED
Pixel forms, and each pixel is formed by the LED of multiple different colours, and any one LED occurs
Fault all can affect the overall display effect of LED display, and two kinds of faults that wherein LED occurs most frequently are for opening
Road fault and short trouble, be referred to as bad point.
Therefore, for guaranteeing the normal display effect of LED display, need periodically or non-periodically LED to be shown
Shield carries out bad point spot check.
Prior art provides a kind of constant-current LED driving chip with full frame error detection function of mourning in silence in real time
(such as MBI5039), this type of constant-current LED driving chip with full frame error detection function of mourning in silence in real time can
LED can be carried out spot check while driving LED.Additionally, use this type of to have full frame mistake of mourning in silence in real time
The constant-current LED driving chip of detecting function can't affect LED display when LED is carried out spot check by mistake
Normal display.
But, in prior art, based on the constant-current LED driving chip having full frame erroneous point checking functions of mourning in silence in real time
LED bad point point detection system in, this has the constant-current LED driving chip of full frame erroneous point checking functions of mourning in silence in real time
The information of institute's spot check directly uses Transistor-Transistor Logic level signal to be transmitted, and transmission range is shorter, and jitter,
The bad point quantity that causes transmitted data to be difficult to correctly feeding back in LED display, coordinate.
Summary of the invention
It is an object of the invention to provide a kind of LED bad point point detection system, it is intended to solve the LED of prior art
The transmission range that bad point point detection system exists is shorter, and jitter, causes transmitted data to be just difficult to
The really bad point quantity in feedback LED display, the problem of coordinate.
To this end, the present invention is by the following technical solutions:
A kind of LED display bad point point detection system, and host computer communication, including LED display, described
The LED of LED display is by the constant-current LED driving chip with full frame error detection function of mourning in silence in real time
Drive；Described LED display bad point point detection system also includes:
Collecting and strengthen the data collection module of data of described constant-current LED driving chip institute spot check, it is defeated
Enter the outfan terminating described LED display；
The data that described data collection module is transmitted intercept after batch processing, store and collect, and
Using the spot check module that RS485 bus is transmitted, its input terminates the outfan of described data collection module；
Send spot check sequential to LED display to start described constant-current LED driving chip to LED display
Carry out spot check, receive described spot check module by the data of described RS485 bus transfer to judge and record institute
State the bad point coordinate information of LED display, and the transmission of described bad point coordinate information is shown to host computer
Main control module, its input terminates the outfan of described spot check module, output terminates described LED display
Input, communication terminate described host computer.
In the LED display bad point point detection system that the present invention provides, use data collection module to collect and increase
There is described in Qiang the data of the constant-current LED driving chip institute spot check of full frame error detection function of mourning in silence in real time, point
Examine batch processing after the data that described data collection module transmits are intercepted by module, store and collect,
Using RS485 bus to be transmitted afterwards, main control module receives described spot check module by RS485 bus
The data of transmission；The advantage utilizing RS485 bus transfer signal, the LED display that therefore present invention provides
Bad point point detection system, has long transmission distance, the advantage of steady signal transmission, and its data transmitted are permissible
Bad point quantity in correct feedback LED display, coordinate.
Accompanying drawing explanation
The theory diagram of the LED bad point point detection system that Fig. 1 provides for the embodiment of the present invention.
Detailed description of the invention
For making the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and concrete
The present invention is described in further detail by embodiment.
With reference to Fig. 1, the theory diagram of the LED bad point point detection system that the embodiment of the present invention provides.
A kind of LED display bad point point detection system, communicates with host computer 5, including LED display 1, LED
The LED 12 of display screen 1 is by the constant-current LED driving chip with full frame error detection function of mourning in silence in real time
11 drive；LED display bad point point detection system also includes: collects and strengthens constant-current LED driving chip
The data collection module 2 of the data of 11 spot checks, the outfan of its input termination LED display 1；Logarithm
Batch processing after intercepting according to the data of collection module 2 transmission, store and collect, and use RS485
The spot check module 3 that bus is transmitted, the outfan of its input termination data collection module 2；When sending spot check
Sequence carries out spot check to start constant-current LED driving chip 11 to LED display 1 to LED display 1, connects
Sink inspection module 3 is sat with the bad point of judgement and record LED display 1 by the data of RS485 bus transfer
Mark information, and the transmission of bad point coordinate information is carried out to host computer 5 main control module 4 shown, it inputs termination
The outfan of spot check module 3, the output termination input of LED display 1, communication ends connect host computer 5.
In the LED display bad point point detection system that the embodiment of the present invention provides, data collection module 2 is used to receive
Collection and enhancing have the number of 11 spot checks of constant-current LED driving chip of full frame error detection function of mourning in silence in real time
Batch processing after the data that data collection module 2 transmits being intercepted according to, spot check module 3, storage and
Collecting, use RS485 bus to be transmitted afterwards, main control module 5 receives spot check module 3 and passes through RS485
The data of bus transfer；The advantage utilizing RS485 bus transfer signal, therefore the embodiment of the present invention provides
LED display bad point point detection system, has long transmission distance, the advantage of steady signal transmission, and it is transmitted
Data can correctly feed back the bad point quantity in LED display, coordinate.
In the present embodiment, the constant-current LED driving chip 11 with full frame error detection function of mourning in silence in real time is type
It number it is the constant-current LED driving chip of MBI5039.This MBI5039 has 16 constant current output pins, can
Simultaneously drive 1-16 LED, in real time LED can be carried out spot check while driving LED.
In the present embodiment, data collection module 2 includes the tri-state bus driver that model is 74HC245, its
Input, outfan are respectively as the input of data collection module 2, outfan.
In the present embodiment, spot check module 3 includes:
The data that data collection module 2 is sent intercept after the CPLD of batch processing, its input conduct
The input of spot check module 3；The data of CPLD transmission are collected and store, uses RS485 afterwards
Bus is transmitted single-chip microcomputer, and the outfan of its input termination CPLD, outfan is as spot check module 3
Outfan.
In the present embodiment, main control module 4 includes: send spot check sequential to LED display 1 to start constant current
LED drive chip 11 carries out the FPGA of spot check to LED display 1, and its outfan is as main control module 4
Outfan；Send spot check order to FPGA, reception spot check module 3 by the number of RS485 bus transfer
According to thus judge and record LED display 1 bad point coordinate information and by bad point coordinate information transmit
To the arm processor of host computer 5, its input is as the input of main control module 4, output termination FPGA
Input, communication ends is as the communication ends of main control module 4.
Hereinafter the operation principle of the LED display bad point point detection system that the embodiment of the present invention provides is made further
Describe.
Arm processor, after receiving the spot check order that host computer 5 sends, first sends spot check order to spot check
The single-chip microcomputer of module 3, controls spot check module 3 and starts program；Then spot check order is sent to FPGA；Then
Enter waiting state, wait the data that spot check module 3 is come by RS485 bus transfer.
FPGA, after receiving the spot check order that arm processor sends, sends spot check sequential and shows to LED
The constant-current LED driving chip 11 with full frame error detection function of mourning in silence in real time of display screen 1.
The constant-current LED driving chip 11 with full frame error detection function of mourning in silence in real time on LED display 1
After receiving spot check sequential, it is judged that this spot check sequential is open circuit spot check sequential or short circuit spot check sequential, then
The LED 12 of LED display 1 is carried out open a way spot check or short circuit spot check, and the data arrived by institute's spot check
Be stored in its internal depositor, then by institute's spot check to data export chronologically to data collection module 2.
For data collection module 2, because LED display 1 is made up of thousands of LED pixel points,
Each pixel is formed by the LED 12 of multiple different colours, therefore the LED display 1 of institute's spot check
Data volume is the biggest；And from LED display 1 data-interface disunity out, and signal is more weak,
So needing to arrange this data collection module 2, for data collection and enhancing.Receipt collection module 2 will
Data collection the enhanced data of LED display transmission are transmitted to spot check module 3.In the present embodiment,
Data collection module 2 includes 74HC245.
In spot check module 3, due to LED display 1 spot check data volume very big, need to pass through CPLD
To data collection module 2 transmission data intercept after batch processing, and will process after data be sent to
Single-chip microcomputer.
The data that data collection module is transmitted by this CPLD illustrated below intercept, batch processing
Concrete mode:
For the LED display of 16*16 pixel, each pixel of this LED display display screen includes
R, G, B, Y totally 4 LED, totally 16 × 16 × 4=1024 LED, this LED display
LED by MBI5039 drive, each MBI5039 drives 16 LED, therefore altogether needs
16 MBI5039；The data that in this MBI5039, spot check arrives are transmitted to data collection module 2, data collection
R, G, B, Y totally 4 circuit-switched data that module is once transmitted to CPLD are 64.CPLD reads first
Time, this is often organized 64 bit data and intercepts the data of regular length, such as 8 bit data；After intercepting 8 bit data it is
Transmission is to single-chip microcomputer；Intercepting the data of next regular length subsequently, the data of this next regular length are with first
The length intercepted is consistent, therefore is still 8；So read all of 64 bit data to completing.
Owing to the memory capacity of CPLD is limited, therefore the data after intercepting, batch processing are transmitted extremely by CPLD
Single-chip microcomputer, these data are collected and store by single-chip microcomputer, afterwards by 485 bus transfer at ARM
Reason device.
Arm processor receives the data that the single-chip microcomputer of spot check module 3 is come by RS485 bus transfer
After, these data are processed: the order of the data sent according to spot check module 3 is corresponding to identify
The coordinate information of LED display 1, it is judged that bad point coordinate information record, finally bad point coordinate is believed
Breath is sent to host computer.
In the embodiment of the present invention, it is provided that LED display bad point point detection system in, use data collection module
2 collect and have constant-current LED driving chip 11 institute of full frame error detection function of mourning in silence in real time described in enhancing
The data of spot check, spot check module 3 is located after intercepting the data that described data collection module 2 transmits in batches
Managing, store and collect, use RS485 bus to be transmitted afterwards, main control module 5 receives described point
Inspection module 3 is by the data of RS485 bus transfer；The advantage utilizing RS485 bus transfer signal, therefore
The LED display bad point point detection system that the embodiment of the present invention provides, has long transmission distance, and transmission signal is steady
Fixed advantage, its data transmitted can correctly feed back the bad point quantity in LED display, coordinate.
Data are carried out cutting by the LED display bad point point detection system that the embodiment of the present invention provides through CPLD
Take, batch processing, and be collected by single-chip microcomputer, store, afterwards single-chip microcomputer by 485 buses by number
According to transmission to arm processor, arm processor judges bad point coordinate information record, finally by bad point
Coordinate information is sent to host computer.The advantage utilizing RS485 bus transfer signal, the therefore embodiment of the present invention
The LED display bad point point detection system provided, has long transmission distance, the advantage of steady signal transmission, its
The data transmitted can correctly feed back the bad point quantity in LED display, coordinate.
These are only the preferred embodiment of the present invention, be not limited to the present invention, all principles in the present invention it
Interior made any amendment, equivalent and improvement etc., within should be included in the scope of protection of the invention.
Claims (4)
1. a LED display bad point point detection system, communicates with host computer (5), shows including LED
Display screen (1), the LED (12) of described LED display (1) is by having full frame mistake of mourning in silence in real time
The constant-current LED driving chip (11) of detecting function drives by mistake；It is characterized in that, described LED shows
Screen bad point point detection system also includes:
Collect and strengthen the data collection of data of described constant-current LED driving chip (11) institute spot check
Module (2), its input terminates the outfan of described LED display (1)；
The data that described data collection module (2) is transmitted intercept after batch processing, storage and
Collecting, and use the spot check module (3) that RS485 bus is transmitted, its input terminates described data
The outfan of collection module (2)；
Send spot check sequential to LED display (1) to start described constant-current LED driving chip (11)
LED display (1) is carried out spot check, receives described spot check module (3) total by described RS485
The data of line transmission are to judge and to record the bad point coordinate information of described LED display (1), and incite somebody to action
The transmission of described bad point coordinate information carries out the main control module (4) shown, its input to host computer (5)
Connect described spot check module (3) outfan, output terminate described LED display (1) input,
Communication terminates described host computer (5)；
Described spot check module (3) including:
The data that described data collection module (2) is sent intercept after the CPLD of batch processing,
Its input is as the input of described spot check module (3)；
The data transmitting described CPLD are collected and store, and use RS485 bus to enter afterwards
Row transmission single-chip microcomputer, its input terminates the outfan of described CPLD, and outfan is as described spot check mould
The outfan of block (3).
2. LED display bad point point detection system as claimed in claim 1, it is characterised in that described
The constant-current LED driving chip (11) with full frame error detection function of mourning in silence in real time is that model is
The constant-current LED driving chip of MBI5039.
3. LED display bad point point detection system as claimed in claim 1, it is characterised in that described
Data collection module (2) includes the tri-state bus driver that model is 74HC245, its input, defeated
Go out to hold the input respectively as described data collection module (2), outfan.
4. LED display bad point point detection system as claimed in claim 1, it is characterised in that described
Main control module (4) including:
Send spot check sequential to LED display (1) to start described constant-current LED driving chip (11)
LED display (1) carries out the FPGA of spot check, and its outfan is as described main control module (4)
Outfan；
Send spot check order to FPGA, receive described spot check module (3) by RS485 bus transfer
Data thus judge and record described LED display (1) bad point coordinate information and will
Bad point coordinate information transmits the arm processor to host computer (5), and its input is as described master control
The input of module (4), output terminates the input of described FPGA, and communication ends is as described master control
The communication ends of module (4).
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| CN201310133211.8A CN104112413B (en) | 2013-04-17 | 2013-04-17 | LED display bad point point detection system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310133211.8A CN104112413B (en) | 2013-04-17 | 2013-04-17 | LED display bad point point detection system |
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| CN104112413B true CN104112413B (en) | 2016-12-28 |
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| CN104333676B (en) * | 2014-11-11 | 2019-06-21 | 广东中星微电子有限公司 | A kind of bad point covering method and system |
| CN104778911A (en) * | 2015-04-22 | 2015-07-15 | 西安诺瓦电子科技有限公司 | Point inspection method of LED sign board as well as LED display control card |
| 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 |
| CN104900187B (en) * | 2015-06-16 | 2018-02-16 | 西安诺瓦电子科技有限公司 | LED display boards control method and control device, LED control cards |
| CN107025869A (en) * | 2017-04-27 | 2017-08-08 | 西安诺瓦电子科技有限公司 | Off line detecting method and system |
| CN107464511A (en) * | 2017-08-17 | 2017-12-12 | 苏州瑞光电子科技股份有限公司 | A kind of detection circuit of LED display, method and system |
| CN110657949A (en) * | 2019-09-29 | 2020-01-07 | 深圳市创显光电有限公司 | LED display screen lamp bead spot inspection device and spot inspection method thereof |
| CN115019705A (en) * | 2022-06-02 | 2022-09-06 | 西安诺瓦星云科技股份有限公司 | Lamp panel module point inspection system and method |
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Address after: 518000 201, No. 13, Huiye Road, Tangjia community, Fenghuang street, Guangming District, Shenzhen City, Guangdong Province Patentee after: Shendecai photoelectric (Shenzhen) Co.,Ltd. Address before: 518000, Guangdong, Baoan District, Fuyong Shenzhen street, new and rich industrial zone eighth, first, second floor Patentee before: Shenzhen Dicolor Optoelectronics Co.,Ltd. |
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