CN201904067U - Nonuniform point-by-point correction system for full-color LED display screen - Google Patents
Nonuniform point-by-point correction system for full-color LED display screen Download PDFInfo
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- CN201904067U CN201904067U CN2010206067572U CN201020606757U CN201904067U CN 201904067 U CN201904067 U CN 201904067U CN 2010206067572 U CN2010206067572 U CN 2010206067572U CN 201020606757 U CN201020606757 U CN 201020606757U CN 201904067 U CN201904067 U CN 201904067U
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Abstract
The utility model relates to a nonuniform point-by-point correction system for a full-color LED display screen, which comprises display image acquisition equipment, data receiving and correcting equipment, a display unit, a constant current driving module, a scanning receiving card and a control system. The constant current driving module comprises a drive IC chip in which correction coefficient data is stored, and the drive IC chip is connected with the display unit. The correction coefficient data is set in a storage unit of drive IC chip, a serial EEPROM (Electrically Erasable Programmable Read-Only Memory) is not additionally needed as a storage apparatus, interfaces of an LED display screen module can be unified, and upgrade is performed on the basis of the traditionally module interfaces, thereby greatly reducing the cost and the maintenance cost of the system and remaining a large space for further upgrade. With the adoption of the point-by-point correction system, accurate correction can be realized, a display picture has good uniformity and consistency, intelligent and efficient point-by-point correction is realized, and the image information can be more truly displayed.
Description
Technical field
The utility model relates to a kind of full-color LED display screen heterogeneity point-to-point correction system.
Background technology
Along with development of science and technology, LED display is used widely, and its latent defect also constantly comes out simultaneously.There are bigger deviation in LED lamp intrinsic brightness and colourity during owing to dispatch from the factory, and the drift of the decay of LED lamp brightness in various degree in the use and colourity all can cause, and the LED display color is coarse, demonstration is inhomogeneous and phenomenons such as mosaic and Hua Ping occur, in order to improve the display effect of LED display, must carry out brightness and chromaticity correction to the LED display pointwise when dispatching from the factory and in the use, so that display image homogeneity, the high conformity of LED display.
At present each big well-known LED display manufacturer display screen is proofreaied and correct all is to adopt to obtain display screen each pixel brightness and chromaticity coordinate based on camera or image colorimeter, thereby calculate correction coefficient data through data processing software.Correction coefficient data storage aspect generally is stored in three kinds of modes of memory module, module EEPROM of Computer Database, scanning receiving card.
Be stored in the Computer Database simple and convenient, need not add special memory device, but exist in the computer software storehouse shortcoming many, the stability of computer system and computer virus to the erosion of database all to the correction data of storage and accurately extract and cause serious harmful effect.
Be stored in the scanning receiving card of module, can make things convenient for module to carry the correction coefficient of self, but also there is weak point, one side is stored in the scanning receiving card for whole screen correction of lease screen and correction coefficient data, this can bring very big inconvenience to the staff, casing increases the work workload, because after whole screen was proofreaied and correct, can not arbitrarily change the position of assembly unit; In a single day scanning receiving card go wrong and can not use aborning or in using on the other hand, and its module correction coefficient data will be lost; Be exactly that a module cisco unity malfunction of working as in the entire display screen needs to change again on the one hand, changing the back entire display screen all must proofread and correct again, and correction coefficient data deposited in the corresponding scanning receiving card once more, this uses to the client and brings very big inconvenience, also influences supply manufacturer's reputation simultaneously.
Correction coefficient data is stored among the module EEPROM, each module carries the correction coefficient data of self, be beneficial to the replacing of module, the assembly unit of casing, also there is simultaneously defective, the essential eeprom memory that adds of each module, the signal data interface also needs to increase a plurality of pins, this has not only increased the cost on the hardware, interface disunity in also feasible the production can be made troubles to production, increases the labour.
So, need to continue more accurate, the intelligentized heterogeneity point-to-point correction system of research and development.
The utility model content
The technical matters that the utility model mainly solves provides a kind of calibration accuracy, display frame homogeneity, high conformity, the high and low maintenance cost of efficient, full-color LED display screen heterogeneity point-to-point correction system that the later stage upgrading space is big.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of full-color LED display screen heterogeneity point-to-point correction system is provided, comprises:
Be used to measure the display image collecting device of the actual image information of not proofreading and correct each pixel brightness of display screen and colourity, described display image collecting device is connected with computing machine;
Receive and actual image information that storage display image collecting device is collected and each pixel brightness and chroma data carried out treatment for correcting, calculates the Data Receiving and the calibration equipment of the correction coefficient of corresponding each pixel;
Display unit and the constant-current driven module that is used to drive the display unit demonstration;
Be used to receive this cascade input control system the shows signal data and will the shows signal data and control signal data pass to the scanning receiving card of the constant-current driven module of corresponding each display unit after handling;
Be used for the computer display card video display signal being read and convert to control signal and correction coefficient data that the needed shows signal data of LED display and receiving computer transmit and the control system that shows signal data, control signal and correction coefficient data is transferred to scanning receiving card by the DVI data-interface;
Described constant-current driven module comprises the driving IC chip that stores the calibration coefficient data, and described driving IC chip is connected with display unit.
Wherein, described computing machine is connected with control system by the RS232 serial ports, and control system is connected with scanning receiving card by the RJ45 interface.
Wherein, described IC chip for driving is built-in 12 or more high-order chip for driving.
Wherein, described display unit is by demonstration module or the whole LED display screen of red, green, blue three-primary color LED lamp by the rule arrangement.
Wherein, described display image collecting device is the image colorimeter.
The beneficial effects of the utility model are: at present, each tame LED display factory commercial city is the lamp that adopts on the constant-current driven module driving LED module of general-purpose interface, therefore, correction coefficient data is arranged on the storage unit of driving IC chip, so both can increase the serial EEPROM of similar AT24C256 and so on as memory device, the interface that also can unify the LED display module, on the basis of existing module interface, upgrade, greatly reduce cost, reduced the maintenance cost of system, and stay than large space for later upgrading.This point-to-point correction system not only can be realized accurate correction, makes display frame homogeneity, high conformity, and this system realizes intelligent, pointwise correction, displays image information more realistically expeditiously.
Description of drawings
Fig. 1 is the correction principle figure of the utility model full-color LED display screen heterogeneity point-to-point correction system;
Fig. 2 is the schematic internal view of Data Receiving described in the utility model and calibration equipment;
Fig. 3 is a control system data transmission synoptic diagram;
Fig. 4 is the schematic internal view of scanning receiving card described in the utility model;
Fig. 5 is the inner structure and the functional diagram of constant-current driven module.
Embodiment
By describing technology contents of the present utility model, structural attitude in detail, realized purpose and effect, give explanation below in conjunction with embodiment and conjunction with figs. are detailed.
Embodiment as the utility model full-color LED display screen heterogeneity point-to-point correction system shown in Fig. 1 to 5, comprising:
Be used to measure the display image collecting device of the actual image information of not proofreading and correct each pixel brightness of display screen and colourity, described display image collecting device is connected with computing machine;
As shown in Figure 2, Data Receiving and calibration equipment, comprise professional optics software, correction software and database, described Data Receiving and calibration equipment are used to receive and store the actual image information that the display image collecting device is collected, coordinate data is distributed in each pixel location, utilize the high accuracy grey scale meter to obtain brightness and colourity that each pixel actual photographed arrives, utilize correction software that treatment for correcting is carried out in each pixel brightness and chroma data, calculate the correction coefficient of corresponding each pixel;
Display unit and the constant-current driven module that is used to drive the display unit demonstration;
Scanning receiving card, be used to receive shows signal data, control signal data and the correction coefficient data of the control system of this cascade input, the shows signal data are separated through plane with control signal data, the another arena deposits buffer memory in, subregion is read then, passes to the constant-current driven module of corresponding each display unit; On the other hand scanning receiving card transmitting display signal therefor data, control signal data and the correction coefficient data of the data that do not belong to the corresponding levels to next cascade;
Control system, as shown in Figure 3, be used for the computer display card video display signal being read and convert to the needed shows signal data of LED display by the DVI data-interface, described control system is the control signal and the correction coefficient data that transmit of receiving computer simultaneously, and shows signal data, control signal and correction coefficient data are transferred to scanning receiving card;
As shown in Figure 5, described constant-current driven module comprises the driving IC chip that stores the calibration coefficient data, described driving IC chip is connected with display unit, the shows signal data obtain final shows signal data through the correction coefficient correction calculation, pass to driving IC chip and drive each pixel to show.
In the present embodiment, described display image collecting device is the image colorimeter.
In the present embodiment, as shown in Figure 4, described scanning receiving card comprises data transfer control circuit, storer, demonstration controlling output circuit and local clock and inner control logic device.
In the present embodiment, described computing machine is connected with control system by the RS232 serial ports, control system is connected with scanning receiving card by the RJ45 interface, computing machine is passed to control system with control signal data and correction coefficient data, and control system is transferred to scanning receiving card with shows signal data, control signal data and correction coefficient data by kilomega network.
In the present embodiment, described corrective system draws 12 correction coefficient, and described IC chip for driving is built-in 12 or more high-order chip for driving.
In the present embodiment, demonstration module or whole LED display screen that described display unit is arranged by rule by red, green, blue three-primary color LED lamp.
The utility model full-color LED display screen heterogeneity point-to-point correction system pointwise correction step is specific as follows:
(1) earlier image capture device image colorimeter is focused, make clearly photographic images of this equipment;
(2) it is fixed red, green, blue, white four colour codes to be carried out in the image capture device measurement, and the actual value measured the brightness chromaticity coordinates of the picture that photographs and high accuracy grey scale meter is mapped;
(3) light all red LED lamp on the led display unit by control system, send command adapted thereto by Data Receiving and calibration equipment and be in image colorimeter in the display unit horizon range, and focus;
(4) gather the image information that all red lights are lighted on the display unit;
(5) obtain in the above-mentioned image YC data of red light in each pixel by the professional optics software in Data Receiving and the calibration equipment;
(6) repeating step (3), (4), (5), gather all greens in the display unit respectively, when the blue led lamp is lighted and the image information when lighting display unit and being white balance, and from three width of cloth images of gathering, draw the brightness and the chromatic value of three-basic-colour lamp in each pixel;
(7) object brightness and the chromatic value of each pixel of setting display unit;
(8) according to desired value, by correction software the brightness and the chromatic value of three-basic-colour lamp in each pixel of timing display unit not compared correction, the method of repaying with the spatial complementary of three-primary color LED lamp draws correction coefficient data, it is the method that compensates a kind of primary colours with other two primary colours that spatial complementary is repaid, be to compensate redness promptly with blue and green brightness in red-correction, blue compensate, thereby three primary colours reach complementation on the colourity in the complementation in the brightness with redness and green;
(9) earlier the correction coefficient after proofreading and correct is stored in the database of Data Receiving and calibration equipment, convenience presents the display effect after the correction immediately, if do not reach the result that display effect can be removed this time correction, proofread and correct once more again, up to the correction coefficient data of the calibration result that obtains;
(10) this correction coefficient data is sent in the scanning receiving card by control system, send in the memory cell of driving IC chip of corresponding module by scanning receiving card again.
At present, each tame LED display factory commercial city is the lamp that adopts on the constant-current driven module driving LED module of general-purpose interface, therefore, correction coefficient data is arranged on the storage unit of driving IC chip, so both can increase the serial EEPROM of similar AT24C256 and so on as memory device, the interface that also can unify the LED display module, on the basis of existing module interface, upgrade, greatly reduce cost, reduced the maintenance cost of system, and stay than large space for later upgrading.This point-to-point correction system not only can be realized accurate correction, makes display frame homogeneity, high conformity, and this system realizes intelligent, pointwise correction, displays image information more realistically expeditiously.
The above only is embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model instructions and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.
Claims (5)
1. full-color LED display screen heterogeneity point-to-point correction system comprises:
Be used to measure the display image collecting device of the actual image information of not proofreading and correct each pixel brightness of display screen and colourity, described display image collecting device is connected with computing machine;
Receive and actual image information that storage display image collecting device is collected and each pixel brightness and chroma data carried out treatment for correcting, calculates the Data Receiving and the calibration equipment of the correction coefficient of corresponding each pixel;
Display unit and the constant-current driven module that is used to drive the display unit demonstration;
Be used to receive this cascade input control system the shows signal data and will the shows signal data and control signal data pass to the scanning receiving card of the constant-current driven module of corresponding each display unit after handling;
Be used for the computer display card video display signal being read and convert to control signal and correction coefficient data that the needed shows signal data of LED display and receiving computer transmit and the control system that shows signal data, control signal and correction coefficient data is transferred to scanning receiving card by the DVI data-interface;
It is characterized in that: described constant-current driven module comprises the driving IC chip that stores the calibration coefficient data, and described driving IC chip is connected with display unit.
2. full-color LED display screen heterogeneity point-to-point correction system according to claim 1, it is characterized in that: described computing machine is connected with control system by the RS232 serial ports, and control system is connected with scanning receiving card by the RJ45 interface.
3. full-color LED display screen heterogeneity point-to-point correction system according to claim 1 is characterized in that: described IC chip for driving is built-in 12 or more high-order chip for driving.
4. full-color LED display screen heterogeneity point-to-point correction system according to claim 1 is characterized in that: demonstration module or whole LED display screen that described display unit is arranged by rule by red, green, blue three-primary color LED lamp.
5. full-color LED display screen heterogeneity point-to-point correction system according to claim 1 is characterized in that: described display image collecting device is the image colorimeter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010206067572U CN201904067U (en) | 2010-11-15 | 2010-11-15 | Nonuniform point-by-point correction system for full-color LED display screen |
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| CN2010206067572U CN201904067U (en) | 2010-11-15 | 2010-11-15 | Nonuniform point-by-point correction system for full-color LED display screen |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944311A (en) * | 2012-11-14 | 2013-02-27 | 广东威创视讯科技股份有限公司 | Automatic chromaticity acquisition device |
| WO2013091542A1 (en) * | 2011-12-20 | 2013-06-27 | 深圳市奥拓电子股份有限公司 | Led display screen point-by-point correction system and point-by-point correction method |
| CN103559863A (en) * | 2013-11-11 | 2014-02-05 | 西安诺瓦电子科技有限公司 | LED lamp panel and LED display screen |
| CN106548749A (en) * | 2017-01-23 | 2017-03-29 | 上海得倍电子技术有限公司 | Independent correction driving means |
| CN107113412A (en) * | 2014-07-31 | 2017-08-29 | 三星电子株式会社 | Display device, display calibration equipment, display correction system and display bearing calibration |
| CN110831276A (en) * | 2019-11-14 | 2020-02-21 | 上海闻泰信息技术有限公司 | LED-based lamplight brightness control method and related device |
| CN112033646A (en) * | 2020-08-13 | 2020-12-04 | 歌尔光学科技有限公司 | Multi-lamp module testing method, device and equipment and computer readable storage medium |
| CN114928910A (en) * | 2022-06-27 | 2022-08-19 | 长沙锐逸微电子有限公司 | LED driving chip |
-
2010
- 2010-11-15 CN CN2010206067572U patent/CN201904067U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013091542A1 (en) * | 2011-12-20 | 2013-06-27 | 深圳市奥拓电子股份有限公司 | Led display screen point-by-point correction system and point-by-point correction method |
| CN102944311A (en) * | 2012-11-14 | 2013-02-27 | 广东威创视讯科技股份有限公司 | Automatic chromaticity acquisition device |
| CN102944311B (en) * | 2012-11-14 | 2016-04-27 | 广东威创视讯科技股份有限公司 | A kind of Automatic chromaticity acquisition device |
| CN103559863A (en) * | 2013-11-11 | 2014-02-05 | 西安诺瓦电子科技有限公司 | LED lamp panel and LED display screen |
| CN103559863B (en) * | 2013-11-11 | 2015-06-17 | 西安诺瓦电子科技有限公司 | LED lamp panel and LED display screen |
| CN107113412A (en) * | 2014-07-31 | 2017-08-29 | 三星电子株式会社 | Display device, display calibration equipment, display correction system and display bearing calibration |
| CN107113412B (en) * | 2014-07-31 | 2019-06-14 | 三星电子株式会社 | Display device, display correction device, display correction system and display bearing calibration |
| CN106548749A (en) * | 2017-01-23 | 2017-03-29 | 上海得倍电子技术有限公司 | Independent correction driving means |
| CN110831276A (en) * | 2019-11-14 | 2020-02-21 | 上海闻泰信息技术有限公司 | LED-based lamplight brightness control method and related device |
| CN112033646A (en) * | 2020-08-13 | 2020-12-04 | 歌尔光学科技有限公司 | Multi-lamp module testing method, device and equipment and computer readable storage medium |
| CN112033646B (en) * | 2020-08-13 | 2022-09-20 | 歌尔光学科技有限公司 | Multi-lamp module testing method, device and equipment and computer readable storage medium |
| 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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