CN101339740A - Intelligent big screen LED control system of high stability - Google Patents
Intelligent big screen LED control system of high stability Download PDFInfo
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- CN101339740A CN101339740A CNA2008101505506A CN200810150550A CN101339740A CN 101339740 A CN101339740 A CN 101339740A CN A2008101505506 A CNA2008101505506 A CN A2008101505506A CN 200810150550 A CN200810150550 A CN 200810150550A CN 101339740 A CN101339740 A CN 101339740A
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Abstract
The invention relates to an intelligentized large screen LED control system with high stability, which can dynamically obtain relevant parameters at the rear end during the normal operation of the LED display screen to strengthen the self-adaption function of single point regulation and high brightness grades and improve the stability of the LED display system. Each driving plate of the invention comprises a nonvalatile memory chip used for storing feature information of light plate pixel. The feature information of the light plate pixel comprises regulation information, models of a LED driving plate, resolution, spacing, driving modes, DPT, and humiture, wherein, the humiture is real-time, and other parameters are all precisely measured during installation in factories, and simultaneously the data measured is stored into the EEPROM of a module. When the display signals are processed, processing components read the information from the EEPROM of each module, and modify the brightness and color difference of the LED to guarantee the state of the display effect to be uniform and optimal.
Description
One, technical field:
The present invention relates to a kind of LED display, especially relate to a kind of intelligent big screen LED control system of high stability.
Two, background technology:
In recent years, along with the develop rapidly of computer technology, large scale integrated circuit and special-purpose components and parts, the full-color LED large display screen of 25 grades of gray scales is developed rapidly at home.But the not very good desirable reason of the display effect of some display screens of present full-color LED display screen, particularly domestic production mainly contains three aspects.
First, the luminescence efficiency of LED is subjected to the influence of manufacturing process to show intrinsic difference, and this species diversity also changes in time, some blackening or specks at random can appear during the large screen display be made up of a large amount of LED like this, have a strong impact on display effect, need to adopt online single point correction technology to eliminate this influence;
Second, the general brightness degree deficiency of existing full color giant-screen, even if adopted the nonlinear gray control technology, the ability of performance color is still relatively poor on low brightness levels, the stereovision that shows is not strong, another problem that is caused by the brightness degree deficiency is to carry out the γ correction to be not easy, thereby makes the full-color LED large display screen produce certain cross-color.
The 3rd, the nonstandardized technique of LED screen parameter.Because mostly outdoor medium is to adopt full-color LED or plasma large scale display screen, and the size of screen, type of drive, resolution, to customize according to actual environment usually as some parameters such as lamp spacings, so the parameter of screen may the criteria of right and wrongization.Therefore require the playback terminal of system when video is exported, can accomplish self-adaptation adjusting is flexibly carried out in output.
Just because of above some, make that present full-color LED display screen is not good enough in aspect effects such as single point correction, brightness regulation.
Three, summary of the invention:
The present invention is in order to solve the weak point in the above-mentioned background technology, a kind of LED drive plate that has self-identifying information is provided, this system is under the LED display normal operation, can dynamically obtain the correlation parameter of rear end, thereby strengthened the self-adaptation regulatory function of single point correction and high brightness level, improved the stability of LED display system.
For achieving the above object, the technical solution used in the present invention is:
A kind of intelligent big screen LED control system of high stability, comprise the drive plate that is arranged on the display screen body, it is characterized in that: each drive plate is provided with the chip for driving that is used to store the storage chip of lamp plate characteristic information and is used to realize the sheet choosing, storage chip is 24C08, it is 001 that the address of storage chip 24C08 connects, the write-protect forbidding; A2, a1, a0 meet the DO2--DO0 of 74HC595, and chip for driving is 74HC595, and the SDI of chip for driving 74HC595 meets CSD, and txd meets txd, and lat meets 1at, and SDO meets the CAD of output, and DO2--DO0 meets a2, a1, the a0 of 24Cxx.
A kind of implementation method of intelligent big screen LED control system of high stability, it is characterized in that: all include a non-volatile storage chip on each drive plate, be used to store the characteristic information of lamp plate pixel, comprise: control information, the model of LED drive plate, resolution, spacing, type of drive, DPT, humiture, wherein humiture is real-time, all will accurately be measured when other parameter is installed in factory, the data of measurement are stored among the EEPROM of module simultaneously; When shows signal is processed, processing element will read this information from the EEPROM of each module, and brightness, the color distinction of LED are revised, and reach consistent optimum condition to guarantee display effect.
Compared with prior art, the advantage that has of the present invention is as follows:
1, technically, at present homemade high-quality LED display and external top product are little in aspect difference such as image processing techniques, front end video processing technique, and main gap is aspect the single-point color correction.It is true to nature that " single-point color correction " technology can guarantee that color shows, sustainable to reach several years constant.And present domestic product can only be accomplished the correction of unit module and unit box, and the single point correction of the whole screen body that can not really accomplish, therefore on color and brightness uniformity, how many difference can be arranged, particularly passing through maintain and replace behind the display unit, because variation may take place the parameter of LED, display effect is difficult to hold unanimity with former screen protection.And this to be operated in abroad be that main equipment by special use is finished, and the domestic equipment that does not have this class to develop because of product performance.In addition, be used to shield the nonstandardized technique of body, and the difference of environment and controlled variable, make that the quality contrast of domestic and international display screen is more remarkable.
2, the LED drive plate of most LED display producer can not intelligence obtain the characteristic information that shields body not with the characteristic information of drive plate on LED display market, also just can not carry out rational data processing and signal controlling according to the different situations that drive lamp plate.At present, pine has been obtained certain innovation in this work, specifically: in the module, the LED fluorescent tube of each pixel correspondence all has numerical value such as its separately color, brightness, all will accurately be measured when these light emitting diodes are installed in factory, the data of measurement are stored into the EEPROM in the module simultaneously.When shows signal is processed, processing element will read this information from the EEPROM of each module, and brightness, the color distinction of LED are revised, and reach consistent optimum condition to guarantee display effect.Certainly, control section also obtains other information such as temperature from driving lamp plate.
Four, description of drawings:
Fig. 1 is the utility model storage chip 24C08 pinouts;
Fig. 2 is the utility model storage chip 24C08 pinout figure;
Fig. 3 is the utility model chip for driving 74HC595 pinouts;
Fig. 4 is the utility model chip for driving 74HC595 pinout figure;
Fig. 5 is the static constant-current driving plate of a utility model theory diagram;
Fig. 6 is the utility model turntable driving plate theory diagram.
Among the figure, 1-chip for driving, 2-storage chip.
Five, embodiment:
Intelligent big screen LED control system is formed from circuit, mainly comprises screen control and lamp plate and drives two parts.Its most notable attribute be to have increased a non-volatile storer driving on the lamp plate, be used to store the correlation parameter of screen body.Thereby screen body control section is realized the adaptive control to the screen body by obtaining the characteristic information of screen body.Can dynamically obtain the correlation parameter of rear end, strengthen the self-adaptation regulatory function of single point correction and high brightness level etc., improve the stability of LED display system.
1. screen control section
The display screen display effect that screen control section control is corresponding, its major function are that the information that will show is sent to video processing part and handles, and are responsible for producing various display control signals.
On the one hand, by the PC serial ports, brightness that can the manual adjustments display screen, contrast, colourity etc. select to be fit to the gray scale gamma correction data of current environment; On the other hand, by obtaining the parameter information of lamp plate drive part, regulate the brightness, contrast, colourity of display screen etc. automatically, Intelligence Selection is fit to the gray scale gamma correction data of current environment, carries out the single point correction of display image and handles.Specifically comprise:
* the gray scale gamma correction can be regulated by automatic or manual;
* automatic or manual brightness regulation;
* the gray level control system can control display screen show 256 grades of gray scales;
* colourity regulatory function;
* distinguish the brightness of the every primary colours of single module in the Adjustment System, adjust croma balance, make the no sight equation of the monochromatic demonstration of all modules and display module, brightness uniformity is good;
In addition, the parameter information that obtains from the driving lamp plate also comprises model, screen body resolution, pixel lamp spacing, type of drive, ambient temperature and humidity and standard time clock of LED drive plate or the like.These information all are used to screen is controlled, thereby realize the intellectuality of screen control.The screen control of this band feedback information is intelligent, and is feasible more real-time, more reasonable to the control of screen body, more can satisfy client's demand.
2. lamp plate drive part
It is opticator that lamp plate drives, and is the break-make of controlling LED by drive IC, and electric signal is changed into light signal.Adopt the red, green, blue Tricolor LED as light-emitting component, realize that every primary colours 256 ash grade real-time videos show, and can set calibration curve according to ambient light illumination, guarantee still that after γ proofreaies and correct 256 ash levels are constant by the user.Each module possesses functions such as independent self check single point correction function, adjustment screen body brightness automatically, full-time time timing brightness, thereby even the sunlight direct projection still can clear display image.
The present invention includes the display screen body, the display screen body is made of the LED drive plate that has self-identifying information, and the storage chip that data are not lost after power down of increase on each drive plate is used to store the lamp plate characteristic information; For realizing the sheet choosing, increase a chip for driving.Storage chip is a 24CXX series, is storage chip 24C08 among the embodiment, and the connection of storage chip 24C08 is: it is 001 that the address connects, the write-protect forbidding; A2, a1, a0 meet the DO2--DO0 of 74HC595; Chip for driving is 74HC595, and the SDI of chip for driving 74HC595 meets CSD, and txd meets txd, and 1at meets 1at, and SDO meets the CAD of output, and DO2--DO0 meets a2, a1, the a0 of 24Cxx.
Referring to Fig. 1 and Fig. 2, storage chip 24C08 is used for depositing the drive plate characteristic information, such as the model of LED drive plate, resolution, spacing, type of drive, DPT or the like.
Referring to Fig. 3 and Fig. 4, the major advantage of chip for driving 74595 is to have data storage register, and in the process of displacement, the data of output terminal can remain unchanged.Be characterized in 8 bit serial inputs, 8 bit serial or and line output; The store status register, three kinds of states, output register can directly be removed, the transposition frequency of 100MHz; And line output, bus driver serial output;
Referring to Fig. 5 and Fig. 6, the serial EEPROM storer (24C08) that drives on the lamp plate is used to deposit the drive plate characteristic information, such as the model of LED drive plate, display resolution, spacing, type of drive, DPT, humiture or the like.
The address is set for non-volatile memory chip 24C08 by hardware program by 74HC595.The major advantage of 74HC595 is to have data storage register, and in the process of displacement, the data of output terminal can remain unchanged.Be characterized in 8 bit serial inputs, 8 bit serial or and line output; The store status register, three kinds of states, output register can directly be removed, the transposition frequency of 100MHz; And line output, bus driver serial output;
The screen control section is by obtaining the parameter information of lamp plate drive part, the brightness of automatic adjusting display screen, contrast, colourity etc., Intelligence Selection is fit to the gray scale gamma correction data of current environment, carry out the single point correction of display image and handle, thereby the display effect of display screen is controlled.Specifically comprise: gray scale is non-linear controls, shields the automatic adjusting of body colour degree consistance etc. automatically from normal moveout correction, automatic brightness adjustment, gray level.
In addition, the parameter information that obtains from the driving lamp plate also comprises model, screen body resolution, pixel lamp spacing, type of drive, ambient temperature and humidity and standard time clock of LED drive plate or the like.These information all are used to screen is controlled, thereby realize the intellectuality of screen control.The screen control of this band feedback information is intelligent, and is feasible more real-time, more reasonable to the control of screen body, more can satisfy client's demand.
According to above-mentioned analysis, the storage chip that data are not lost after power down of increase on the drive plate is used to store the lamp plate characteristic information, thereby screen body control section is realized the adaptive control to the screen body by obtaining the characteristic information of screen body.Like this, just can make the no sight equation of the monochromatic demonstration of all modules and display module, brightness uniformity is good.
Claims (2)
1, a kind of intelligent big screen LED control system of high stability, comprise the drive plate that is arranged on the display screen body, it is characterized in that: each drive plate is provided with the storage chip (2) that is used to store the lamp plate characteristic information and is used to realize the chip for driving (1) of sheet choosing, storage chip (2) is 24C08, it is 001 that the address of storage chip 24C08 connects, the write-protect forbidding; A2, a1, a0 meet the DO2--DO0 of 74HC595, and chip for driving (1) is 74HC595, and the SDI of chip for driving 74HC595 meets CSD, and txd meets txd, and lat meets lat, and SDO meets the CAD of output, and DO2--DO0 meets a2, a1, the a0 of 24Cxx.
2, the implementation method of the intelligent big screen LED control system of a kind of high stability according to claim 1, it is characterized in that: all include a non-volatile storage chip (2) on each drive plate, be used to store the characteristic information of lamp plate pixel, comprise: control information, the model of LED drive plate, resolution, spacing, type of drive, DPT, humiture, wherein humiture is real-time, all will accurately be measured when other parameter is installed in factory, the data of measurement are stored among the EEPROM of module simultaneously; When shows signal is processed, processing element will read this information from the EEPROM of each module, and brightness, the color distinction of LED are revised, and reach consistent optimum condition to guarantee display effect.
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| CNA2008101505506A CN101339740A (en) | 2008-08-05 | 2008-08-05 | Intelligent big screen LED control system of high stability |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102065152A (en) * | 2010-11-05 | 2011-05-18 | 广东威创视讯科技股份有限公司 | Joined screen system and communication device thereof |
| CN102254539A (en) * | 2010-05-18 | 2011-11-23 | 苏州安可信通信技术有限公司 | Adaptive method for screen driver of portable electronic equipment and electronic equipment |
| CN103400550A (en) * | 2013-08-16 | 2013-11-20 | 西安诺瓦电子科技有限公司 | LED lamp panel, LED box body and LED display screen |
| CN103413525A (en) * | 2013-08-16 | 2013-11-27 | 西安诺瓦电子科技有限公司 | LED lamp panel, LED box and LED display screen |
| CN106448550A (en) * | 2016-12-27 | 2017-02-22 | 福州海天微电子科技有限公司 | LED screen parameter automatic identifying method and device |
| CN113627118A (en) * | 2021-10-12 | 2021-11-09 | 广州中大中鸣科技有限公司 | Method, device, equipment and storage medium for automatically extracting coordinates of lamp |
| CN114137435A (en) * | 2021-11-25 | 2022-03-04 | 深圳市九洲光电科技有限公司 | LED display online calibration system |
| CN114928910A (en) * | 2022-06-27 | 2022-08-19 | 长沙锐逸微电子有限公司 | LED driving chip |
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2008
- 2008-08-05 CN CNA2008101505506A patent/CN101339740A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102254539A (en) * | 2010-05-18 | 2011-11-23 | 苏州安可信通信技术有限公司 | Adaptive method for screen driver of portable electronic equipment and electronic equipment |
| CN102254539B (en) * | 2010-05-18 | 2016-01-20 | 苏州安可信通信技术有限公司 | Screen driver of portable adaptive approach and this electronic equipment |
| CN102065152A (en) * | 2010-11-05 | 2011-05-18 | 广东威创视讯科技股份有限公司 | Joined screen system and communication device thereof |
| CN103400550A (en) * | 2013-08-16 | 2013-11-20 | 西安诺瓦电子科技有限公司 | LED lamp panel, LED box body and LED display screen |
| CN103413525A (en) * | 2013-08-16 | 2013-11-27 | 西安诺瓦电子科技有限公司 | LED lamp panel, LED box and LED display screen |
| CN103400550B (en) * | 2013-08-16 | 2015-06-03 | 西安诺瓦电子科技有限公司 | LED lamp panel, LED box body and LED display screen |
| CN106448550A (en) * | 2016-12-27 | 2017-02-22 | 福州海天微电子科技有限公司 | LED screen parameter automatic identifying method and device |
| CN113627118A (en) * | 2021-10-12 | 2021-11-09 | 广州中大中鸣科技有限公司 | Method, device, equipment and storage medium for automatically extracting coordinates of lamp |
| CN113627118B (en) * | 2021-10-12 | 2022-02-22 | 广州中大中鸣科技有限公司 | Method, device, equipment and storage medium for automatically extracting coordinates of lamp |
| CN114137435A (en) * | 2021-11-25 | 2022-03-04 | 深圳市九洲光电科技有限公司 | LED display online calibration system |
| CN114928910A (en) * | 2022-06-27 | 2022-08-19 | 长沙锐逸微电子有限公司 | LED driving chip |
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Open date: 20090107 |