CN201838296U - Automatic dead pixel detecting device of LED (light-emitting diode) display - Google Patents
Automatic dead pixel detecting device of LED (light-emitting diode) display Download PDFInfo
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- CN201838296U CN201838296U CN2010205540484U CN201020554048U CN201838296U CN 201838296 U CN201838296 U CN 201838296U CN 2010205540484 U CN2010205540484 U CN 2010205540484U CN 201020554048 U CN201020554048 U CN 201020554048U CN 201838296 U CN201838296 U CN 201838296U
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Abstract
The utility model discloses an automatic dead pixel detecting device of an LED (light-emitting diode) display, comprising a data processing device, a data transmitting module, at least one data acquisition device and at least one LED display unit, wherein the data processing device is electrically connected with the at least one data acquisition device by the data transmitting module; the at least one data acquisition device is electrically connected with the at least one LED display unit. Due to adoption of the automatic dead pixel detecting device of the LED display, the dead pixels of a display screen pixel tube can be detected in real time, the wrong detected data is processed into a physical coordinate of the dead pixels on the display screen, so that a client or a maintainer can capture the coordinate data of the invalid pixel points of the display screen accurately in real time with long distance and no need of going to site under the using and playing state of the display screen, so that the use and maintenance efficiency of the display screen are greatly improved.
Description
Technical field
The utility model relates to the LED field, relates in particular to the bad point of a kind of LED display automatic detection device.
Background technology
The LED display utilization more and more widely, can see its application in places such as financial instrument, competitive sports, traffic message, advertisement delivery, video display amusements, it is fast that lifting and LED display itself owing to recent years decline of LED cost and brightness has little power consumption simultaneously, the life-span is long, the visual angle reaches response speed greatly, and can be according to the advantage of different location and the customized corresponding size of demand, emerge the communications media favorite of a new generation on market fast, its condition other large-scale display devices especially is incomparable.Given this, how to improve the starting point that the LED display picture quality level has become current numerous producer to make great efforts by various technological means.
In LED display after long-term the use, owing to external environment condition or certain reason, a part of LED opens a way, short trouble, if can not in time detect out of order LED, the phenomenon of the very coarse or mosaic block of color not only can occur, and may cause the expansion of fault.
Whether the light emitting diode of the LED display of a large amount of outdoor deployment at present and the control circuit monitoring of operate as normal do not have good way, and by artificial visual inspection, might not in time pinpoint the problems.
The utility model content
The technical matters that the utility model mainly solves provides the bad point of a kind of LED display automatic detection device, and it comprises:
At least one led display unit that constitutes by the evenly distributed according to certain rules template of red, green, blue three-primary color LED lamp or casing or entire display screen curtain;
Electrically connect with data transmission module and at least one led display unit respectively, check whether the bad point of LED display automatic detection device enters the error detection pattern, and enter receive after the error detection pattern the detecting sign indicating number of corresponding led display unit, and be transferred at least one data collector of data processing equipment by data transmission module;
The data transmission module that electrically connects with data processing equipment and described at least one data collector respectively;
Receive the data of described led display unit viewing area according to the address of different LED display unit, and judge the data processing equipment of the coordinate of bad some LED according to the data that received;
Described at least one data collector comprises: and the storer that electrically connects of FPGA and be used for controlling the LED chip for driving to described LED chip for driving transmitting control commands enters device and withdraws from the detecting pattern control module of error detection pattern;
Be used to receive the control command of detecting pattern control module, come control device whether to enter the error detection pattern, and after entering the error detection pattern, detected detecting sign indicating number is transferred to the LED chip for driving of FPGA;
Receive the detecting sign indicating number of LED chip for driving after being used for testing fixture and whether entering the error detection pattern and enter the error detection pattern, and, wait for the FPGA that communication unit is taken away depositing among the SRAM after the detecting sign indicating number buffered that is received;
Be used for communicating by letter with data processing equipment, and after the transmission order that obtains data processing equipment, the error detection data that the FPGA module is received send the communication unit of data processing equipment to.
Wherein, described at least one data collector comprises that also at least one Transistor-Transistor Logic level conversion of signals that is used for at least one data harvester is the MAX3080 chip that the level signal of RS422 interface standard is transferred to data processing equipment, and described at least one MAX3080 chip links to each other with communication unit.
Wherein, described data transmission module comprises PC serial ports and the RS232/RS422 converter that is connected, and described PC serial ports is connected with data processing equipment, and described RS232/RS422 converter is connected with described at least one MAX3080 chip.
Wherein, described LED chip for driving adopts the MBI5027 chip.
Wherein, described communication unit adopts the AT89S51 chip.
The bad point of the LED display that the utility model provides automatic detection device, can detect the bad point of display screen matrix pipe in real time, and the error detection data processing is converted on the display screen to the physical coordinates of bad point, make client or maintainer remote under the use broadcast state of display screen, need not the coordinate data that the scene just can accurately capture display screen inefficacy pixel in real time, improved the operation and maintenance efficient of display screen greatly.
Description of drawings
Fig. 1 is the module diagram of the bad point of the utility model LED display automatic detection device;
Fig. 2 be the MBI5027 chip of the bad point of the utility model LED display automatic detection device by the general work mode switch to the error detection pattern at LE, the OE of chip, the sequential chart that the CLK signal end is imported;
Fig. 3 be MBI 5027 chips of the bad point of the utility model LED display automatic detection device by the error detection mode switch to the general work pattern at LE, the OE of chip, one group of sequential chart that the CLK signal end is imported;
The sequential chart of CLK and OE when Fig. 4 is the bad point of the utility model LED display automatic detection device read error detecting sign indicating number.
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.
By shown in Figure 1, be the module diagram of the bad point of the utility model LED display automatic detection device 3, the bad point of LED display automatic detection device 3 comprises: data processing equipment 10, the data transmission module 20, the N data harvester 30 that are made of PC serial ports 21 and RS232/RS422 converter 23 and the led display unit 40 that is connected with data collector 30 respectively.N is a natural number.
Described data processing equipment 10 electrically connects with N data harvester 30 by PC serial ports 21 and RS232/RS422 converter 23 successively.
Described data collector 30 is used for judgment means and whether enters the error detection pattern; After entering the error detection pattern, receive the detecting data that comes by 35 transmission of LED chip for driving, and depositing in the storer (SRAM) 34 after all detecting data buffered that receive; After the data that receive data processing equipment 10 are transferred order, the detecting data among the SRAM34 is transferred to data processing equipment 10 by RS232/RS422 converter 23 and PC serial ports 21.
This SRAM34 is connected with FPGA33, is used for storing the detecting data that FPGA33 receives.
This detecting pattern control module 36 is used to receive the order of data processing equipment 10, and according to the order that is received, and device is entered and withdraws from the error detection pattern by control LED chip for driving 35.
This LED chip for driving 35 is used for coming control device whether to enter the error detection pattern by receiving the control command of detecting pattern control module 36, and after entering the error detection pattern, detected detecting sign indicating number is transferred to FPGA33.
In the present embodiment, the chip for driving 35 of LED is for having the MBI5027 chip of error detection function, and what the error detection function that this MBI5027 chip has adopted is the Share-I-O technology.
As shown in Figure 2, import one group of combined sequence, just can make chip enter the error detection pattern at LE, OE, the CLK signal end of the chip for driving 35 of LED.
As shown in Figure 3, make it return general modfel from the error detection mode switch, only need are imported another group sequential combination at LE, OE, the CLK signal end of the chip for driving 35 of LED.
After the chip for driving 35 of LED entered sense mode, the pointwise pick-up unit began to detect the OE state to prepare acceptance error detecting sign indicating number.
As shown in Figure 4, after OE enters sense mode for " 101 ", OE will be changed to once more more than 3 pulses of low level and at interval and be changed to high level again more than at least 2 microseconds, sending last " 0 " back just can be latched into LED chip for driving 35 detected detecting sign indicating numbers in its shift register, this moment, OE was drawn high to behind the high level, to finish error detection, the error detection sign indicating number that is stored in the shift register can be along with the shifting out from the SDO mouth of one one of CLK, and video data can be imported by the SDI mouth simultaneously.
Receive the detecting sign indicating number of LED chip for driving 35 after whether this FPGA33, responsible testing fixture enter the error detection pattern and enter the error detection pattern, and the detecting sign indicating number that receives is carried out deposit among the SRAM34 after the buffered of data, wait for that communication unit 32 takes away.
The serial data of PC is delivered to data on the communication unit 32 of each pick-up unit by the RS422 converter, and whether the program of communication unit 32 inside handles these data according to the address decision of self.
The serial ports of this AT89S51 chip is connected to MAX3080 chip 31, and to be used for the Transistor-Transistor Logic level conversion of signals in the digital circuit be the level signal of RS422 interface standard and be transferred to data processing equipment 10, to realize long-distance transmissions and can install cascade more.
The bad point of utilization the utility model LED display automatic detection device 3 detects and comprises two steps:
1. judge bad point coordinate
Concrete, each display control unit can be with 8 road or 16 tunnel chip for driving, i.e. MBI5027, and all chip for driving on every road connects, and data can be from first last a slice of handover.After pick-up unit 30 detected the detecting code data and sends to data processing equipment 10, data processing equipment 10 just can position bad point.
Concrete, if 8*16 module of a display control unit band, each module is 8 row, 8 row, if bad point is M for the position of place byte, be N byte in the whole data, then judge divided by 64 round numbers and the position of the module at this erroneous point place get remainder by N divided by 64 and can judge the position of this erroneous point in this module by N, still be that DC3 receives according to data from DC1, DC2 at last, judgement is red pipe, green pipe or basket pipe LED.
2. judge bad point symptom
After the error detection sign indicating number was received by data processing equipment 10, only needing according to the voltage that is added on the LED be whether decidable LED lost efficacy for which kind of voltage: if to detect sign indicating number be " logical zero " then represent that there is open fault in this LED to applying normal working voltage on it; If to its voltage (as less than normal working voltage) detecting sign indicating number that imposes cisco unity malfunction for " logical one " then represent that there is short trouble in this LED.
The bad point of the LED display that the utility model provides automatic detection device 3, can detect the bad point of display screen matrix pipe in real time, and the error detection data processing is converted on the display screen to the physical coordinates of bad point, make client or maintainer remote under the use broadcast state of display screen, need not the coordinate data that the scene just can accurately capture display screen inefficacy pixel in real time, improved the operation and maintenance efficient of display screen greatly.
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. a LED display is gone bad the some automatic detection device, and it comprises:
At least one led display unit that constitutes by the evenly distributed according to certain rules template of red, green, blue three-primary color LED lamp or casing or entire display screen curtain;
Electrically connect with data transmission module and at least one led display unit respectively, check whether the bad point of LED display automatic detection device enters the error detection pattern, and enter receive after the error detection pattern the detecting sign indicating number of corresponding led display unit, and be transferred at least one data collector of data processing equipment by data transmission module;
The data transmission module that electrically connects with data processing equipment and described at least one data collector respectively;
Receive the data of described led display unit viewing area according to the address of different LED display unit, and judge the data processing equipment of the coordinate of bad some LED according to the data that received;
It is characterized in that: described at least one data collector comprises: and the storer that electrically connects of FPGA and be used for controlling the LED chip for driving to described LED chip for driving transmitting control commands enters device and withdraws from the detecting pattern control module of error detection pattern;
Be used to receive the control command of detecting pattern control module, come control device whether to enter the error detection pattern, and after entering the error detection pattern, detected detecting sign indicating number is transferred to the LED chip for driving of FPGA;
Receive the detecting sign indicating number of LED chip for driving after being used for testing fixture and whether entering the error detection pattern and enter the error detection pattern, and, wait for the FPGA that communication unit is taken away depositing among the SRAM after the detecting sign indicating number buffered that is received;
Be used for communicating by letter with data processing equipment, and after the transmission order that obtains data processing equipment, the error detection data that the FPGA module is received send the communication unit of data processing equipment to.
2. the bad point of LED display according to claim 1 automatic detection device, it is characterized in that: described at least one data collector comprises that also at least one Transistor-Transistor Logic level conversion of signals that is used for at least one data harvester is the MAX3080 chip that the level signal of RS422 interface standard is transferred to data processing equipment, and described at least one MAX3080 chip links to each other with communication unit.
3. the bad point of LED display according to claim 2 automatic detection device, it is characterized in that: described data transmission module comprises PC serial ports and the RS232/RS422 converter that is connected, described PC serial ports is connected with data processing equipment, and described RS232/RS422 converter is connected with described at least one MAX3080 chip.
4. the bad point of LED display according to claim 1 automatic detection device, it is characterized in that: described LED chip for driving adopts the MBI5027 chip.
5. the bad point of LED display according to claim 1 automatic detection device, it is characterized in that: described communication unit adopts the AT89S51 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205540484U CN201838296U (en) | 2010-10-09 | 2010-10-09 | Automatic dead pixel detecting device of LED (light-emitting diode) display |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010205540484U CN201838296U (en) | 2010-10-09 | 2010-10-09 | Automatic dead pixel detecting device of LED (light-emitting diode) display |
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| CN201838296U true CN201838296U (en) | 2011-05-18 |
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| CN2010205540484U Expired - Fee Related CN201838296U (en) | 2010-10-09 | 2010-10-09 | Automatic dead pixel detecting device of LED (light-emitting diode) display |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103076531A (en) * | 2012-12-28 | 2013-05-01 | 上海澳星照明电器制造有限公司 | Light emitting diode (LED) failure detection circuit based on MBI5039 chip and detection method |
| CN104021748A (en) * | 2014-06-18 | 2014-09-03 | 无锡市崇安区科技创业服务中心 | LED display screen dead point detecting system |
| CN104112413A (en) * | 2013-04-17 | 2014-10-22 | 深圳市德彩光电有限公司 | LED display screen dead pixel point inspection system |
| CN104267719A (en) * | 2014-10-20 | 2015-01-07 | 上海光联照明有限公司 | Bus-system LED display system point-by-point fault detection method and application thereof |
| WO2015043139A1 (en) * | 2013-09-26 | 2015-04-02 | 西安诺瓦电子科技有限公司 | Led lamp panel, control card of led display screen, and led display screen system |
| CN104795025A (en) * | 2015-04-29 | 2015-07-22 | 西安诺瓦电子科技有限公司 | LED display module and method for detecting states thereof |
| CN105609021A (en) * | 2015-12-20 | 2016-05-25 | 苏州长风航空电子有限公司 | Quick detection method for aviation display |
| CN105987807A (en) * | 2015-02-15 | 2016-10-05 | 宁波舜宇光电信息有限公司 | Defective point detection system and method for vertical cavity surface emitting laser array |
| CN106353900A (en) * | 2016-08-30 | 2017-01-25 | 武汉精测电子技术股份有限公司 | Image signal generation method and device with coordinate acquisition function |
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2010
- 2010-10-09 CN CN2010205540484U patent/CN201838296U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103076531A (en) * | 2012-12-28 | 2013-05-01 | 上海澳星照明电器制造有限公司 | Light emitting diode (LED) failure detection circuit based on MBI5039 chip and detection method |
| CN104112413B (en) * | 2013-04-17 | 2016-12-28 | 深圳市德彩光电有限公司 | LED display bad point point detection system |
| CN104112413A (en) * | 2013-04-17 | 2014-10-22 | 深圳市德彩光电有限公司 | LED display screen dead pixel point inspection system |
| WO2015043139A1 (en) * | 2013-09-26 | 2015-04-02 | 西安诺瓦电子科技有限公司 | Led lamp panel, control card of led display screen, and led display screen system |
| CN104021748A (en) * | 2014-06-18 | 2014-09-03 | 无锡市崇安区科技创业服务中心 | LED display screen dead point detecting system |
| CN104267719A (en) * | 2014-10-20 | 2015-01-07 | 上海光联照明有限公司 | Bus-system LED display system point-by-point fault detection method and application thereof |
| CN104267719B (en) * | 2014-10-20 | 2016-11-30 | 上海光联照明有限公司 | Bus LED display system pointwise method for detecting fault and application thereof |
| CN105987807A (en) * | 2015-02-15 | 2016-10-05 | 宁波舜宇光电信息有限公司 | Defective point detection system and method for vertical cavity surface emitting laser array |
| CN104795025A (en) * | 2015-04-29 | 2015-07-22 | 西安诺瓦电子科技有限公司 | LED display module and method for detecting states thereof |
| CN105609021A (en) * | 2015-12-20 | 2016-05-25 | 苏州长风航空电子有限公司 | Quick detection method for aviation display |
| CN105609021B (en) * | 2015-12-20 | 2019-01-01 | 苏州长风航空电子有限公司 | A kind of rapid detection method of aviation displays |
| CN106353900A (en) * | 2016-08-30 | 2017-01-25 | 武汉精测电子技术股份有限公司 | Image signal generation method and device with coordinate acquisition function |
| CN106353900B (en) * | 2016-08-30 | 2019-08-13 | 武汉精测电子集团股份有限公司 | A kind of picture signal generation method and device obtaining function with coordinate |
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