CN107358911A - Eliminate scan screen, LED display the method for black line occurs when height refreshes - Google Patents
Eliminate scan screen, LED display the method for black line occurs when height refreshes Download PDFInfo
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- CN107358911A CN107358911A CN201710528698.8A CN201710528698A CN107358911A CN 107358911 A CN107358911 A CN 107358911A CN 201710528698 A CN201710528698 A CN 201710528698A CN 107358911 A CN107358911 A CN 107358911A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
Abstract
The invention discloses a kind of elimination scan screen, LED display to there is the method for black line when height refreshes, this method uses the automatic detection frame period time, cause the uncertainty of frame period time by refresh rate and configuration parameter, the frame period time is averagely broken up in often sweeping, this method includes：Monitor module, judge module, point-by-point accumulator module, the monitor module use FPGA hardware, and it mainly detects the frame period time；The judge module judges mainly to include a comparator, and the data of itself and monitor module sample frame are contrasted, if beyond theoretical value, the frame period time whether more than setting valve value；The point-by-point accumulator module, which is used to the blanking time break up, often to be swept, and using the mathematical algorithm of Approach by inchmeal, ceaselessly approximation theory value.The present invention reaches elimination professional camera from display methods bottom or the phenomenon of black line occurs in mobile phone.
Description
Technical field
The present invention relates to LED display technical field, particularly relates to a kind of elimination scan screen, LED display exists
There is the method for black line when refreshing in height.
Background technology
In current all kinds LED display control programs, LED shows that lamp plate is various, plus chip and PCB works
Skill is varied, causes after showing lamp plate with same system configuration LED, is required for distributing parameter rationally, and every time match somebody with somebody
It is all different to put parameter, it is also different to finally result in display effect, will produce black line, and black line phenomenon people in this case
Naked eyes can not find out, but professional camera or mobile phone aperture time shoot in short-term occur picture show black line phenomenon,
And it is higher with the sample rate of video camera, black line will be more serious, because black line situation is more special, in large-scale performance
When meeting, TV station record the application scenarios such as program, black line phenomenon just occurs with mobile phone photograph or video recording display screen, and
And the effect of display black line have it is light have weight, and can not completely control, so cause to take pictures or effect of recording a video is had a greatly reduced quality, most
Relief user thinks that display effect is bad.Therefore, for these black line phenomenons, the prior art is defective, it is necessary to improve.
Prior art eliminates the operation principle of black line：
LED shows that the technique of lamp plate is different, and eliminating black line has method typically to have two kinds, divides hardware and software way, hardware is done
Method is usually to add the antijamming capability of blanking circuit or lamp plate PCB, also has software way, blanking is finely tuned by display system
Time or other specification eliminate the display effect of black line to reach.
1st, hardware way shortcoming：In small spacing lamp plate as the spacing between lamp and lamp reduces, the difficulty of placement-and-routing is got over
Come bigger, blanking circuit can also take certain arrangement space, can also increase hardware cost sometimes, and the user having is in order to drop
Low system cost, the number of driving chip is reduced, meet the needs of high density screen, reduce the number of component, producers are in LED
Dynamic scan has been used on scan screen.But when using dynamic scan, some problems also are brought to display screen, wherein just having
The appearance of black line, it is difficult to control；
2nd, software way shortcoming：The blanking time is added in display system or eliminates caterpillar method to realize the hair of control lamp plate
Caterpillar phenomenon, but mostly it is oneself artificial calculation, can not be completely accurate, it is not intelligent, but can not be completely eliminated sometimes, only
It can mitigate, if hardware is too poor, the quality of the method for manual control can just embody, and good method can just eliminate, bad
Method does not have effect substantially.
Test is found：Black line will be shown when professional camera and mobile phone photograph, because present control system brush
New rate is all very high, and refresh rate is higher, people's naked eyes more None- identified, be due to the reason for this phenomenon LED control system be by
Scan lamp plate one by one, scan screen has frame blanking time, the i.e. interval time per frame, and this frame blanking time deposits
In uncertainty, because the parameter of each lamp plate configuration is different, the interval between frame and frame is also different, the frame blanking time
Length may result in uncertainty, and design method of the invention is accurately controlled using the frame blanking time of automatic monitoring scan screen
Scan screen blanking interval, reaches elimination professional camera from display methods bottom or the phenomenon of black line occurs in mobile phone.
The content of the invention
For deficiency of the prior art, the technical problem to be solved in the present invention be the provision of it is a kind of eliminate scan screen,
There is the method for black line when height refreshes in LED display.
In order to solve the above technical problems, the present invention is realized by following scheme：Scan screen, LED display are eliminated in height
Occurs the method for black line during refreshing, this method uses the automatic detection frame period time, causes frame by refresh rate and configuration parameter
The uncertainty of interval time, the frame period time is averagely broken up in often sweeping, this method includes：
Monitor module, the monitor module use FPGA hardware, and it mainly detects the frame period time；
Judge module, the judge module judgement mainly include a comparator, its data progress with monitor module sample frame
Contrast, if beyond theoretical value, whether the frame period time is more than the valve value set；
Point-by-point accumulator module, the point-by-point accumulator module, which is used to the blanking time break up, often to be swept, and using gradually forcing
Near mathematical algorithm, ceaselessly approximation theory value.
Further, the point-by-point accumulator module uses point-by-point accumulation algorithm Approach by inchmeal virtual value, when it is accurately controlled
Between between 50-100us.
Relative to prior art, the beneficial effects of the invention are as follows：LED control system of the present invention eliminates scan screen LED and shown
There is the realization principle of black line in lamp plate display when height refreshes：Using the automatic detection frame period time, pass through refresh rate and configuration
Parameter causes the uncertainty of frame period time, the frame period time is averagely broken up in often sweeping, and what is so both ensured is aobvious
Show that effect eliminates the black line phenomenon occurred during high refresh again.Specific implementation：LED control system can be compiled using scene mostly
Journey gate array is realized, is realized using host computer+FPGA, is accurately to control the advantages of field programmable gate array, precision can reach
To ns ranks, have good stability strong, repeat programming, frame period time monitoring is realized using FPGA hardware, addition is sentenced
Disconnected and arbitration, accurate sample frame interval time（The also referred to as frame blanking time）, averagely broken up disappearing of often sweeping the frame period time
The hidden time goes, and so neither influences display effect and can and eliminates caterpillar phenomenon.Method main theory is：Using point-by-point cumulative side
Method Approach by inchmeal virtual value, accurate control time is in 50-100us or so.
The method that elimination scan screen, the LED display of the present invention black line occur when height refreshes also has the effect that：
1. because LED display body space is less and less, lamp plate PCB placement-and-routing space is less and less, with chip price
Go up, the function of black line can more reduce hardware cost when high refresh is eliminated by LED control system, facilitate user.
2. performance is more stable, the present invention is realized using the control module of automatic supervisory frame blanking time, the people of reduction
For maloperation, it is more convenient and reliable.
3. other hardware costs will not be increased while increasing control module, and display effect can be made more preferable, with tradition
Display effect advantageously.
4. under the cost reasons for not adding hardware, cost is saved for user.
Brief description of the drawings
Fig. 1 eliminates scan screen for the present invention, LED display the theory diagram of the method for black line occurs when height refreshes.
Embodiment
The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, apparent is clearly defined so as to be made to protection scope of the present invention.
As shown in figure 1, elimination scan screen, LED display occur the method for black line when height refreshes, this method is using automatic
Detection frame interval time, the uncertainty of frame period time is caused by refresh rate and configuration parameter, the frame period time is averaged
Break up in often sweeping, this method includes：
Monitor module, the monitor module use FPGA hardware, and it mainly detects the frame period time；
Judge module, the judge module judgement mainly include a comparator, its data progress with monitor module sample frame
Contrast, if beyond theoretical value, whether the frame period time is more than the valve value set；
Point-by-point accumulator module, the point-by-point accumulator module, which is used to the blanking time break up, often to be swept, and using gradually forcing
Near mathematical algorithm, ceaselessly approximation theory value.
LED control system of the present invention eliminates scan screen LED and shows that lamp plate shows that the realization for black line occur is former when height refreshes
Reason：Using the automatic detection frame period time, the uncertainty of frame period time is caused by refresh rate and configuration parameter, interframe
In the time averagely breaks up and often swept, the display effect that had so not only ensured but also eliminate the black line occurred during high refresh and show
As.
Specific implementation：LED control system is realized using field programmable gate array mostly, using host computer+FPGA
To realize, be accurately to control the advantages of field programmable gate array, precision can reach ns ranks, have that good stability is strong,
Repeatable programming, frame period time monitoring is realized using FPGA hardware, add and judge and arbitrate, accurate sample frame interval time
（The also referred to as frame blanking time）, the frame period time was averagely broken up to the blanking time often swept and gone, so neither influences display effect
Fruit and can eliminates caterpillar phenomenon.Algorithm main theory is：Using point-by-point accumulation algorithm Approach by inchmeal virtual value, when accurately controlling
Between in 50-100us or so.Find that the present invention can effectively reduce the frame period time after tested, precision reaches 50-100us, and specialty is taken the photograph
Camera and mobile phone shooting effect can substantially eliminate black line.
The preferred embodiment of the present invention is the foregoing is only, not thereby limits the invention scope of the present invention, every profit
The equivalent structure or equivalent flow conversion made with description of the invention and accompanying drawing content, or directly or indirectly it is used in other phases
The technical field of pass, similarly it is included in the invention protection domain of the present invention.
Claims (2)
1. eliminate scan screen, LED display the method for black line occurs when height refreshes, it is characterised in that this method is using automatic
Detection frame interval time, the uncertainty of frame period time is caused by refresh rate and configuration parameter, the frame period time is averaged
Break up in often sweeping, this method includes：
Monitor module, the monitor module use FPGA hardware, and it mainly detects the frame period time；
Judge module, the judge module judgement mainly include a comparator, its data progress with monitor module sample frame
Contrast, if beyond theoretical value, whether the frame period time is more than the valve value set；
Point-by-point accumulator module, the point-by-point accumulator module, which is used to the blanking time break up, often to be swept, and using gradually forcing
Near mathematical algorithm, ceaselessly approximation theory value.
2. there is the method for black line when height refreshes in the elimination scan screen, LED display according to technical requirements 1, its feature
It is：The point-by-point accumulator module uses point-by-point accumulation algorithm Approach by inchmeal virtual value, and its accurate control time is in 50-100us
Between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710528698.8A CN107358911A (en) | 2017-07-01 | 2017-07-01 | Eliminate scan screen, LED display the method for black line occurs when height refreshes |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710528698.8A CN107358911A (en) | 2017-07-01 | 2017-07-01 | Eliminate scan screen, LED display the method for black line occurs when height refreshes |
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| CN107358911A true CN107358911A (en) | 2017-11-17 |
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| CN201710528698.8A Pending CN107358911A (en) | 2017-07-01 | 2017-07-01 | Eliminate scan screen, LED display the method for black line occurs when height refreshes |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108665847A (en) * | 2018-05-17 | 2018-10-16 | 深圳市灵星雨科技开发有限公司 | A kind of dark bright method of LED display elimination |
| CN114078420A (en) * | 2020-08-21 | 2022-02-22 | 西安钛铂锶电子科技有限公司 | Black field optimization method and device |
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| CN103886835A (en) * | 2014-02-10 | 2014-06-25 | 深圳市明微电子股份有限公司 | Method for solving dynamic screen row dark phenomenon, system thereof, driving chip, and control card |
| CN104951266A (en) * | 2015-06-11 | 2015-09-30 | 联想(北京)有限公司 | Screen adjustment method and electronic device |
| CN106131476A (en) * | 2016-06-22 | 2016-11-16 | 北京集创北方科技股份有限公司 | Control the method and apparatus that display refreshes |
| CN106128355A (en) * | 2016-07-14 | 2016-11-16 | 北京智能管家科技有限公司 | The display packing of a kind of LED battle array and device |
| CN106331851A (en) * | 2016-08-31 | 2017-01-11 | 深圳市华星光电技术有限公司 | Liquid crystal display television and data processing device thereof |
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Patent Citations (6)
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| US20130321365A1 (en) * | 2012-05-30 | 2013-12-05 | Orise Technology Co., Ltd. | Display panel driving and scanning method and system |
| CN103886835A (en) * | 2014-02-10 | 2014-06-25 | 深圳市明微电子股份有限公司 | Method for solving dynamic screen row dark phenomenon, system thereof, driving chip, and control card |
| CN104951266A (en) * | 2015-06-11 | 2015-09-30 | 联想(北京)有限公司 | Screen adjustment method and electronic device |
| CN106131476A (en) * | 2016-06-22 | 2016-11-16 | 北京集创北方科技股份有限公司 | Control the method and apparatus that display refreshes |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108665847A (en) * | 2018-05-17 | 2018-10-16 | 深圳市灵星雨科技开发有限公司 | A kind of dark bright method of LED display elimination |
| CN108665847B (en) * | 2018-05-17 | 2020-10-23 | 深圳市灵星雨科技开发有限公司 | Method for eliminating dark and bright of LED display screen |
| CN114078420A (en) * | 2020-08-21 | 2022-02-22 | 西安钛铂锶电子科技有限公司 | Black field optimization method and device |
| CN114078420B (en) * | 2020-08-21 | 2023-03-31 | 西安钛铂锶电子科技有限公司 | Black field optimization method and device |
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Application publication date: 20171117 |