CN104217684B - LED bad point processing method and LED display control method - Google Patents
LED bad point processing method and LED display control method Download PDFInfo
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- CN104217684B CN104217684B CN201410460531.9A CN201410460531A CN104217684B CN 104217684 B CN104217684 B CN 104217684B CN 201410460531 A CN201410460531 A CN 201410460531A CN 104217684 B CN104217684 B CN 104217684B
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Abstract
The present invention relates to a kind of LED bad point processing method and a kind of LED display control method.Wherein, LED bad point processing method includes step: the multiple LED points output controlling in LED display module specifies gray value with display detection picture；The shooting picture obtaining shot detection picture is analyzed processing with the position determining the LED bad point in multiple lamp point；And the position of the LED bad point determined is sent to the display control program electrically connected with LED display module, with by display control program process vedio data time by the gray value zero setting of view data corresponding for the LED pixel point at LED bad point place after recycling process after vedio data drive control LED display module show.The present invention need not manually repair bad point place module, can greatly reduce maintenance cost, the operation easier of reduction bad point repair process on the premise of ensureing display effect.
Description
Technical field
The present invention relates to technical field of LED display, particularly relate to a kind of LED bad point processing method and one
LED display control method.
Background technology
Along with LED manufacture technology and the lifting of LED Display Technique, the use of large scale LED display is non-
Often extensively, some crowded places such as Cultural Square, street corner, station, market, hotel all use LED to show
Display screen carries out outdoor advertising displaying；It is mainly used in playing some oneself Discount Promotion advertisements, or other visitors
The advertisement that family is thrown in, is used for collecting some advertising expenses.Abroad, the application market of LED display is the most very
Extensively.In use, along with using, the growth of time, LED point are aging, solder joint de-for these display screens
Fall, it may appear that sparse LED bad point.
The characteristic controlled due to LED display, it will usually cause the lamp point light on and off near bad point abnormal.Generally I
It will be seen that certain region in LED display, due to the necrosis of a lamp point, can cause around
Lamp point luminous intensity and fluorescent lifetime occur abnormal.
As it is shown in figure 1, it is a kind of common LED lamp panel control circuit.Under normal circumstances, control is worked as
The when that circuit making LED1 light, owing to diode turn-on voltage is certain so that A point voltage
VA=VD-Vf=VDD2-Vf (Vf is diode blanking voltage).Now, although E point and F point voltage VE,
VF is logic low, but actual be uncontrollable voltage, simultaneously a VE, VF is necessarily smaller than VDD2,
So (VE-VB), (VF-VC) is necessarily smaller than Vf and makes LED2, LED3 all without conducting, also would not
Luminous.But, if LED1 comes off generation bad point due to aging or lamp point so that in control circuit control
System is when light LED1, is now logical zero due to IN end in control chip, and OUT1 end is also for patrolling
Collect 0, and because LED1 does not has luminescence in fact, so causing the electric current flowing through LED1 is 0, VA is not
It is pulled to VDD2-Vf, remains logical zero, and now E, voltage VE at F, VF are uncontrollable, as
The difference of any one voltage of really VE, VF and OUT1 voltage can cause LED2 or LED3 more than Vf
Luminescence, and the luminous intensity of now LED2, LED3 (namely gray value) is by the gray value control of lamp point LED1
System, can there is a difference in the luminous intensity original relative to lamp point LED2, LED3, the brightest
Go out exception.
Traditional bad point processing method includes: a). by blowing hot wind, the lamp plate at bad point place is blown soft, by LED
The LED point that bad point removes and again changes, although this processing method can repair bad point, but operates
Very trouble, time-consuming, meanwhile, if careless manipulation, may be such that workload increases；B). change LED
The lamp plate (module) at bad point place, this processing method causes replacement cost too high, simultaneously as the lamp after Geng Huaning
Plate and other lamp plates are not same batches, can destroy the bright chroma homogeneity of display screen, so that again
Display screen is carried out bright chroma correction；C). not processing, LED bad point adjacent lamp point light on and off of leaving are abnormal.
Summary of the invention
Therefore, the embodiment of the present invention provides a kind of LED bad point processing method and a kind of LED to show controlling party
Method, it is abnormal that it can solve the display that in prior art, display screen bad point causes, and reduces the maintenance of display screen bad point
Difficulty, operability is strengthened, and reduce display screen bad point maintenance cost, promote the display screen display longevity
Life.
Specifically, a kind of LED bad point processing method that the embodiment of the present invention provides, it includes step: (s11)
Controlling the multiple LED points output in LED display module specifies gray value with display detection picture；(s12)
The shooting picture obtaining the described detection picture of shooting is analyzed processing to determine in the plurality of lamp point
The position of LED bad point；And the position of the LED bad point determined is sent to show with described LED by (S13)
The display control program of module electrical connection, to be incited somebody to action when processing vedio data by described display control program
Regarding after recycling processes after the gray value zero setting of the view data that the LED pixel point at LED bad point place is corresponding
Frequently view data drives the described LED display module of control to show.
In one embodiment of the invention, described step (s11) including: controls in described LED display module
The plurality of LED point in multiple first color LED points output specify gray values to show the first face
Look detection picture；And control multiple second in the plurality of LED point in described LED display module
The output of color LED point specifies gray value to show the second color detection picture.
In one embodiment of the invention, above-mentioned appointment gray value is the highest gray value.
In one embodiment of the invention, in above-mentioned steps (s13), by the LED at LED bad point place
The gray value zero setting of the view data that pixel is corresponding includes: bright by the LED pixel point at LED bad point place
Chromaticity correction coefficient zero setting.
It addition, a kind of LED display control method that the embodiment of the present invention provides, it is applied to that there is LED bad point
LED display module, it includes step: (s31) obtains vedio data；(s32) by video image number
According to corresponding to the gray value zero setting of view data of LED pixel point at LED bad point place to be processed after
Vedio data；And the vedio data after (s33) utilization process drives the described LED of control to show
Module shows.
In one embodiment of the invention, in above-mentioned steps (s32), will vedio data correspond to
The gray value zero setting of the view data of the pixel at LED bad point place includes: by the LED at LED bad point place
The bright chroma correction coefficient zero setting of pixel.
From the foregoing, it will be observed that the embodiment of the present invention need not artificially repair bad point place module, can be aobvious in guarantee
Greatly reduce maintenance cost on the premise of showing effect, can overcome owing to replacing module causes bright chroma uniform
Property preferable screen after maintenance uniformity occur decline, the operation easier of bad point repair process can be reduced.
By the detailed description below with reference to accompanying drawing, the other side of the present invention and feature become obvious.But
It should be known that this accompanying drawing is only the purpose design rather than the restriction as the scope of the present invention explained,
This is because it should refer to appended claims.It should also be noted that unless otherwise noted, it is not necessary to depend on
Ratio draws accompanying drawing, and they only try hard to structure described herein and flow process are described conceptually.
Accompanying drawing explanation
Fig. 1 is a kind of common LED lamp panel control circuit schematic diagram.
Fig. 2 is a kind of LED bad point processing system Organization Chart of the embodiment of the present invention.
Detailed description of the invention
Understandable for enabling the above-mentioned purpose of the present invention, feature and advantage to become apparent from, the most right
The detailed description of the invention of the present invention is described in detail.
Referring to Fig. 2, it is a kind of LED bad point processing system Organization Chart of the embodiment of the present invention.Such as Fig. 2
Shown in, operating personnel set up the display control program 25 in bad point detection equipment 21 and LED display it
Between connection, it can be wired connection, it is also possible to be wireless connection such as WIFI or 3G etc..Additionally,
In LED display, LED display 23 and display control program 25 form electrical connection；Here, LED
Display screen 23 is as a kind of citing of LED display module, and it can be double-colored screen or full-color screen；Display control
System 25 processed can be LED display synchronous control system or LED display asynchronous control system, and it can
LED display 23 is controlled vedio data to be processed and utilizes process rear video view data to drive
Show.More specifically, LED display synchronous control system such as includes the broadcasting meter sequentially electrically connected
Calculation machine, sending card and receiving card, perhaps some LED display synchronous control system is not provided with sending card and normal
Referred to as without sending card LED display synchronous control system；LED display asynchronous control system such as includes
Asynchronous control-card, some is even also configured with receiving card.
Holding above-mentioned, the LED bad point processing method of the present embodiment specifically can be realized by following steps:
First, user opens process software, takes pictures the detection picture of LED display 23 display, example
As sequentially shot red, green, blue three look detection picture, the picture then obtained shooting is carried out respectively
Image analysis processing, red, green, blue LED bad point in the case of each monochrome in acquisition LED display 23
Position.
Then, LED bad point position is uploaded to the display control program 25 electrically connected with LED display 23,
Such as sending the sending card in display control program 25 to, sending card receives the coordinate data of LED bad point
After, the vedio data received is being treated in journey, the when of exporting each frame image data,
The gray value of view data corresponding for the LED pixel point at LED bad point place is set to 0, i.e. controls this picture
The output electric current zero setting of each color LED in vegetarian refreshments, the method that can use is: by regulating this pixel
In point, the bright chroma correction coefficient of each color LED point completes, such as by each color in this pixel
The bright chroma correction coefficient of LED point is set to zero, the most no matter inputs which type of current value, its output
It is zero.View data the most after treatment exports LED display 23 and would not go out when display
Existing light on and off are abnormal.At this it is noted that as a example by R, G, B three primary colours full-color LED display screen,
Single led pixel includes that at least one is red, at least one is green and at least one blue led lamp point,
When wherein any one lamp point is bad point, the image that assorted LED point in the most whole LED pixel point is corresponding
The gray value of data all can be set to 0, namely the gray value of view data corresponding to aforesaid LED pixel point
It is set to 0.
For ease of being more clearly understood that the present invention, below in conjunction with Fig. 1, the embodiment of the present invention is realized principle
Illustrate:
As it is shown in figure 1, it is a kind of common LED lamp panel control circuit.Under normal circumstances, control is worked as
The when that circuit making lamp point LED1 light according to certain luminous intensity (gray value), the output that LED1 is corresponding
Pin output level is a high level VDD2, and OUT1 end output one is relevant with gray value
PWM (modulated width-pulse ripple) signal so that lamp point LED1 sends one and specifies the light that gray value is corresponding
By force.
Diode current flow when, owing to diode turn-on voltage is certain so that A point voltage
VA=VD-Vf=VDD2-Vf (Vf is diode blanking voltage).Now, although E point and F point voltage VE,
VF is logic low, but actual be uncontrollable voltage, simultaneously a VE, VF is necessarily smaller than VDD2,
So (VE-VB), (VF-VC) be necessarily smaller than Vf make lamp point LED2, LED3 all without conducting, the most not
Can luminescence.But, if lamp point LED1 comes off generation bad point due to aging or lamp point so that controlling
Circuit control LED1 lamp bright when, be now logical zero due to IN end in control chip, OUT1 end
Also it is logical zero, and because LED1 does not has luminescence, in fact so causing the electric current flowing through LED1 is 0, VA
It is not pulled to VDD2-Vf, remains logical zero, and now E, voltage VE at F, VF are uncontrollable,
If the difference of the voltage of E, F any point and OUT1 terminal voltage more than Vf, may result in LED2 or
LED3 is luminous, and the luminous intensity of now LED2, LED3, namely gray value is by the gray scale of LED1
Value controls, and the luminous intensity original relative to LED2, LED3 can exist difference, referred to herein as light on and off
Abnormal.
Analyzed and test discovery by the present inventor: when LED1 bad point disconnects, if control point again
Bright LED1 normally results in LED2 or LED3 and extremely lights, and during actual displayed, can cause
The luminous intensity of LED2, LED3 is abnormal；If now gray value corresponding for LED1 being set to 0, the most just
To control LED1 not allow it bright because the input of IN end is for logic 1, OUT1 end be output as one logically high
Level, then VA, VB, VC are high level, then (VE-VB) and (VF-VC) is certainly less than Vf, LED2
And LED3 would not abnormal light on and off.
It addition, during bad point detection, because being to control LED display 23 sequentially to show red, green, blue
Three look detection pictures are also measured respectively；Further, when measuring every time, LED display 23 each LED point
The gray value of output all controls as the highest gray value such as 255, although so now may cause lighting controlling
LED2, LED3 lamp can be caused the when of LED1 bright, but gray value is all 255, is not see when taking pictures
LED2, LED3 have glittering exception；So do not affect software take pictures location bad point position.Furthermore, it is to be understood that
Be, it is also possible to the red, green, blue three-color LED light point in LED display 23 is all lighted and is set defeated
Going out gray value and be 255, it equally reaches the purpose of bad point detection, and also can reduce pendulous frequency.
Furthermore, it is to be understood that although during aforementioned bad point detection, being to set LED point to export the highest
Gray value, it will be appreciated by those skilled in the art that LED point output gray level value during Jian Ce
Setting is not limited to the highest gray value, it is also possible to suitably reduce, if do not interfere with software take pictures location bad
Point position.
In sum, the above embodiment of the present invention need not artificially repair bad point place module, can protect
Maintenance cost is greatly reduced, because showing for a larger-size LED on the premise of card display effect
Screen, its LED counts the most up to ten thousand, at most hundreds of thousands～millions of, if the physical distance of bad point
The light on and off more greatly, simultaneously not having surrounding lamp point are abnormal, do not affect the viewing effect of user in actual displayed effect
Really.Furthermore, it is possible to overcome owing to replacing module (lamp plate) causes the preferable display screen of bright chroma uniformity in dimension
Repair rear uniformity to occur declining.Furthermore it is also possible to reduce the operation easier of bad point repair process.
Specific case used herein shows controlling party to LED bad point processing method of the present invention and LED
Principle and the embodiment of method are set forth, and the explanation of above example is only intended to help and understands the present invention
Method and core concept；Simultaneously for one of ordinary skill in the art, according to the thought of the present invention,
The most all will change, in sum, this specification content should not
Being interpreted as limitation of the present invention, protection scope of the present invention should be as the criterion with appended claim.
Claims (6)
1. a LED bad point processing method, it is characterised in that include step:
(x1) controlling the multiple LED points output in LED display module specifies gray value with display detection picture
Face；
(x2) it is analyzed processing the plurality of to determine to shooting the shooting picture that obtains of described detection picture
The position of the LED bad point in LED point；And
(x3) position of the LED bad point determined is sent to the display control electrically connected with described LED display module
System processed, with by described display control program process vedio data time by the LED at LED bad point place
Vedio data after recycling processes after the gray value zero setting of the view data that pixel is corresponding drives and controls
Described LED display module shows.
2. LED bad point processing method as claimed in claim 1, it is characterised in that described step (x1) is wrapped
Include:
Control the multiple first color LED in the plurality of LED point in described LED display module
Point exports described appointment gray value to show the first color detection picture；And
Control the multiple second color LED in the plurality of LED point in described LED display module
Point exports described appointment gray value to show the second color detection picture.
3. LED bad point processing method as claimed in claim 1, it is characterised in that described appointment gray value
For the highest gray value.
4. LED bad point processing method as claimed in claim 1, it is characterised in that at described step (x3)
In, the gray value zero setting of view data corresponding for the LED pixel point at LED bad point place is included: by LED
The bright chroma correction coefficient zero setting of the LED pixel point at bad point place.
5. a LED display control method, is applied to the LED display module with LED bad point；It is special
Levying and be, described LED display control method includes step:
(z1) vedio data is obtained；
(z2) vedio data will correspond to the ash of the view data of the LED pixel point at LED bad point place
Angle value zero setting is with the vedio data after being processed；And
(z3) vedio data after utilization processes drives the described LED display module of control to show.
6. LED display control method as claimed in claim 5, it is characterised in that at described step (z2)
In, vedio data will correspond to the gray value of the view data of the LED pixel point at LED bad point place
Zero setting includes: by the bright chroma correction coefficient zero setting of the LED pixel point at LED bad point place.
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| CN104200775A (en) * | 2014-09-22 | 2014-12-10 | 西安电子科技大学 | LED defective pixel treatment method |
| CN105390092B (en) * | 2015-12-09 | 2018-01-12 | 西安诺瓦电子科技有限公司 | LED display image processing method and device and its application |
| CN106023883B (en) * | 2016-07-15 | 2018-08-17 | 西安诺瓦电子科技有限公司 | Local sexual abnormality lamp point processing method after LED display correction |
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| CN106409197B (en) * | 2016-11-21 | 2020-05-19 | 西安诺瓦星云科技股份有限公司 | LED lamp panel fault detection method |
| CN107945768A (en) * | 2017-11-15 | 2018-04-20 | 威创集团股份有限公司 | Screen color part quick calibration method, device and system |
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| CN112562580B (en) * | 2020-12-18 | 2022-11-25 | 上海谦奕电子科技有限公司 | LED display screen control method and system |
| CN112884681B (en) * | 2021-04-28 | 2021-09-17 | 卡莱特云科技股份有限公司 | Image shadow processing method and device, computer equipment and storage medium |
| CN113297923A (en) * | 2021-04-30 | 2021-08-24 | 西安诺瓦星云科技股份有限公司 | Display screen monitoring method, device and system and embedded processor |
| CN114049861A (en) * | 2021-11-16 | 2022-02-15 | 北京集创北方科技股份有限公司 | LED display screen control method, device, equipment and system |
| CN116049863B (en) * | 2023-03-28 | 2023-06-13 | 东莞锐视光电科技有限公司 | System, method and application for generating stripe light by LCD display screen |
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