CN106548749A - Independent correction driving means - Google Patents
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- CN106548749A CN106548749A CN201710049146.9A CN201710049146A CN106548749A CN 106548749 A CN106548749 A CN 106548749A CN 201710049146 A CN201710049146 A CN 201710049146A CN 106548749 A CN106548749 A CN 106548749A
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- 238000012937 correction Methods 0.000 title claims abstract description 134
- 230000015654 memory Effects 0.000 claims abstract description 27
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- 239000013641 positive control Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 9
- 230000006870 function Effects 0.000 description 8
- 230000003287 optical effect Effects 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
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- 241001269238 Data Species 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
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- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
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- 230000008859 change Effects 0.000 description 1
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- 238000004020 luminiscence type Methods 0.000 description 1
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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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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a kind of independently correct driving means, including one or more driver elements, one or more of driver elements are used to drive LED pixel array；Corrective control module, one end of the Corrective control module is connected to one or more of driver elements, the other end of the Corrective control module receives display data, wherein described Corrective control module includes data memory module, and the data memory module is used for the correction data of each pixel for storing the LED pixel array.
Description
Technical field
The present invention relates to the independent correction driving means of field of LED display, more particularly, to LED display module.
Background technology
As pixel, LED is realized into that the advantage of large screen display includes：Brightness is high, operating voltage is low,
Small power consumption, maximization, life-span length, impact resistance and stable performance, therefore its application is more and more extensive.
Generally, one piece of big LED display is spliced by multiple LED display modules.Due to manufacturing process etc.
Reason, the performance of each LED chip have different.As LED chip has 20% difference, i.e. red, green, blue three in brightness
Individual passage has 20% luminance difference；Simultaneously because the pressure of manufacturing cost, typically by wavelength 5nm difference LED chip
It is qualified to be considered as, therefore there is also certain color distortion.When these display screen modules made by discrepant LED chip integrated
For LED display when, if not carrying out enough compensation to these differences, macroscopic LED display will occurs
Brightness, color distortion.In addition, during LED display use, the replacement of the LED module of damage cause new module with it is whole
Screen is mismatched, and this can also substantially reduce the visual performance of LED display.
Fig. 1 illustrates the block diagram of the correction system of the LED display according to prior art.Current LED display pointwise school
Just mainly it is corrected in the erecting bed of LED display, is typically chosen evening dark, have no occluder before LED display,
Visibility is high, fine day, carries out under conditions of around disturbing without intense light source.
Whole LED display pointwise correction flow process normally wants two knack persons to complete in 3-5 hours, and timing is by week
Enclose ambient influnence larger, Jing often with the presence of uncertain factor (such as bad weather, peripheral obstacle is blocked), will spend one sometimes
Whole can just complete in even two evenings in the evening.So, current LED display pointwise correction method exist because environment reason without
The shortcomings of method is corrected, correction efficiency is low, correction error is big, while the bearing calibration needs substantial amounts of human and material resources and time, Jing
Ji benefit is low.
The problem high for large-size screen monitors correction, straightened up in place difficulty in current engineering, not yet proposes effective solution party at present
Case.
The content of the invention
For the high problem of large-size screen monitors correction, straightened up in place difficulty in prior art, the present invention provides one kind and shows for LED
The independent correction driving means of screen module, before dispatching from the factory comprising the LED display module for independently correcting driving means, will correction
In data write data memory module so that LED display module can carry its correction data, show when complete LED is assembled into
During display screen system, each LED display module reads the correction data on each data memory module by Corrective control module first
It is corrected, and straightened up in place need not be carried out, so as to solves the above problems.
According to an aspect of the present invention, there is provided a kind of independent correction driving means, including：One or more drive single
Unit, one or more of driver elements are used to drive LED pixel array；Corrective control module, the Corrective control module
One end is connected to one or more of driver elements, and the other end of the Corrective control module receives display data, wherein institute
Stating Corrective control module includes data memory module, and the data memory module is used to storing each of the LED pixel array
The correction data of pixel.
Further, the Corrective control module also includes：Receiver module；Sending module, the sending module are connected to
One or more of driver elements；Selecting switch, the selecting switch are used to the sending module to be connected to institute selectively
State receiver module or the data memory module.
Further, the driver element includes：Data decoder, the data decoder are connected to the Corrective control
Module；Multiple current controllers, each in the plurality of current controller are connected to the data decoder；It is multiple adjustable
Constant-current source, each in the plurality of tabilized current power supply are connected to corresponding one in the plurality of current controller.
Further, the current controller is current control register, and the tabilized current power supply is based on the electric current control
The numerical value stored in register processed adjusts the output current of the tabilized current power supply.
Further, the adjusting range of the tabilized current power supply is demarcate output current ± 20%.
Further, the adjusting range of the tabilized current power supply is demarcate output current ± 10%.
Further, the driver element also includes display driver, and one end of the display driver is connected to data
The decoder, the other end are connected to the plurality of tabilized current power supply.
Further, in the independent correction driving means during electricity, the independent correction driving means are carried out first
Correction data is initialized, and then the independent correction driving means enter normal displaying mode.
Further, during correction data initialization, the Corrective control module is stored in reading data memory module
Correction data, and correction data is sent to into the data decoder, the data decoder is decoded to correction data,
And the correction data of decoding is sent to into the plurality of current controller.
Further, during normal displaying mode, the display data is sent to described by the Corrective control module
Data decoder, the data decoder are decoded to the display data, and decoded data is activation is shown to described
Show driver.
Description of the drawings
In order to further elucidate the above and other advantages and features of various embodiments of the present invention, refer to the attached drawing is presented
The more specifically description of various embodiments of the present invention.It is appreciated that these accompanying drawings only describe the exemplary embodiments of the present invention, therefore
It is restriction on its scope to be not to be regarded as.In the accompanying drawings, in order to cheer and bright, identical or corresponding part will be with identical or class
As mark represent.
Fig. 1 illustrates the block diagram of the correction system of the LED display according to prior art.
Fig. 2 illustrates the block diagram of independent correction LED display screen system according to an embodiment of the invention.
Fig. 3 illustrates the block diagram of independent correction LED display module according to an embodiment of the invention 300.
Fig. 4 illustrates that embodiments in accordance with the present invention carry out the frame of the correction system 400 of independent correction to LED display module
Figure.
Fig. 5 illustrates that the display with electric current adjustment function of LED display module according to an embodiment of the invention drives dress
The block diagram put.
Specific embodiment
In the following description, with reference to each embodiment, present invention is described.However, those skilled in the art will recognize
Know and can replace and/or addition method, material or component in the case of neither one or multiple specific details or with other
Implement each embodiment together.It is in other situations, not shown or do not describe known structure, material or operation in detail in order to avoid making this
The aspects of each embodiment of invention is obscure.Similarly, for purposes of explanation, specific quantity, material and configuration are elaborated, with
Comprehensive understanding to embodiments of the invention is just provided.However, the present invention can be implemented in the case of no specific detail.This
Outward, it should be understood that each embodiment illustrated in accompanying drawing is illustrative expression and is not drawn necessarily to scale.
In this manual, the reference of " one embodiment " or " embodiment " is meaned with reference to the embodiment description
Special characteristic, structure or characteristic are included at least one embodiment of the invention.In the short of this specification middle appearance everywhere
Language " in one embodiment " is not necessarily all referring to same embodiment.
Fig. 2 illustrates the block diagram of independent correction LED display screen system 200 according to an embodiment of the invention.Such as Fig. 2 institutes
Show, independent correction LED display screen system 200 includes：One or more independently correct LED display module 210 and image control
System 220.One or more independently correct LED display module 210 and constitute the LED of independent correction LED display screen system and show
Screen.Image control system 220 based on image to be shown or video generate display data and by display data be supplied to one or
Multiple independent correction LED display modules 210.
After independent correction LED display screen system 200 is powered, image control system 220 sends display data to independence
Correction LED display module 210.Independent correction LED display module 210 is corrected data initialization first, is then based on
The display data received from image control system 220 starts normal display image or video.
Fig. 3 illustrates the block diagram of independent correction LED display module according to an embodiment of the invention 300 (210).Solely
Vertical correction LED display module 300 includes one or more LED display modules 310 and Corrective control module 320.
Although in the embodiment shown in fig. 3, independent correction LED display module 300 includes a LED display module
310, but it will be appreciated by those skilled in the art that independent correction LED display module 300 may include that multiple LED show
Module 310, for example, independent correction LED display module 300 may include 4*4 LED display module 310.Each LED shows mould
Block 310 may include LED pixel array 311 and the driver element for driving LED pixel array.For example, pel array can be
Pel array of 4*4,16*16,32*32 or 64*64 etc..Each pixel can be that monochromatic, dual base color or three primary colours are (complete
It is color) pixel cell.Monochrome refers to only a kind of LED pipe of color, mostly Shan Hong color, also can be with yellowish green in some special occasions
Color；Dual base color pixel cell is made up of red and green LED pipe；Full color pixel unit is by red, green and blue led pipe group
Into.The type of full color pixel unit generally includes 2R1G, 2R1G1B, 1R1G1B etc., 2R1G refer to a pixel cell have 2 it is red
Color LED pipe and 1 green LED pipe, 2R1G1B refer to that a pixel cell has 2 red LED pipes, 1 green LED pipe and 1 blue
Color LED pipe, 1R1G1B refer to that a pixel cell has 1 red LED pipe, 1 green LED pipe and 1 blue led pipe.
Independent correction LED display module 300 also includes Corrective control module 320.One end of Corrective control module 320 leads to
Cross interface and be connected to external image control system 220, the other end is connected to LED display module 310.
As each LED diode has certain difference, even if driving current unanimously cannot also ensure its luminosity one
Cause, so can could be adjusted to compensate the emission difference of LED diodes by the output current to each output channel.Cause
This, before the normal display image of LED display, needs to be corrected each LED diode.
The invention provides a kind of can show correction to the LED that independent correction LED display module carries out independent correction
System.One or more are independently being corrected LED display module group assembling into before LED display screen system, to each independent correction
LED display module is corrected, to obtain correction data.Fig. 4 shows embodiments in accordance with the present invention to independent correction LED
Display screen module carries out the block diagram that the LED of independent correction shows correction system 400.As shown in figure 4, LED shows correction system 400
Including optical system for collecting 410, master control computer 420, image processing system 430, LED display control programs 440, independent correction
LED display module 450 (300,210).
Optical system for collecting 410 is a closed lighttight closing space, and independent correction LED can be installed in space
Display screen module 450 and optical pickocff.It is luminous by 440 control display screen module of LED display control programs, by optically detecting
The data that system 410 is collected are sent to image processing system 430 and carry out image procossing, and correction data is obtained after process.School
Correction data is sent to independent correction LED display module 450 and based on the correction data pair by LED display control programs 440
Each LED chip in independent correction LED display module 450 is corrected.Then again by optical system for collecting 410,
The display data of the independent correction LED display module after 430 analysis correction of image processing system, until display effect reaches mesh
Mark requires, records the final all kinds of correction datas for obtaining, and the correction data is stored in independent correction LED display module
In 450 memories of itself.
Fig. 3 is now turned to, concrete structure and the operation of independent correction LED display module of the invention 300 is introduced
Pattern.
Corrective control module 320 includes receiver module 321, selecting switch 322, data memory module 323 and sends mould
Block 324.The connection external image of receiver module 321 control system 220, the LED in the connection LED display module 310 of sending module 324
Driving chip.Selecting switch 322 is used for controlling the connection of sending module 324 receiver module 321 or connection data memory module
323.When sending module 324 connects receiver module 321, LED display module 300 is in normal display state.When transmission mould
During the connection data memory module 323 of block 324, LED display module 300 is in Data correction state.
The RGB that data memory module 323 is used to store each LED pixel point in independent correction LED display module 300 is bright
All kinds of correction datas such as degree, chromaticity correction and/or white balance correction.Data memory module 323 can be nonvolatile memory
And/or memory element, for example, read only memory ROM, programmable read only memory PROM, EPROM
EPROM, electricallyerasable ROM (EEROM) EEPROM and/or flash memory.Data memory module 323 can also be battery powered random
Access holder (RAM).
The concrete operations pattern of independent correction LED display module 300 is as follows：
LED module timings are being carried out, the connection LED of receiver module 321 shows correction system 400, and LED shows correction system
400 are sent to LED display module 300 primary data first, obtain LED display module 300 by optically detecting analysis
The optical aberration data of each pixel.Correction data is obtained by optical aberration data operation to be sent to correction data again
LED display module 300 is simultaneously corrected to each pixel of LED display module 300 based on the correction data.Then,
Optically detecting is carried out again, until each pixel optical aberration data touches the mark.Finally final correction data is sent
To data memory module 323 and solidified.
After the completion of LED display module 300 is corrected, during upper electricity, sending module 324 and data are deposited by selecting switch 322 every time
Storage module 323 links together, to be first corrected data initialization to LED display module 300 after ensureing upper electricity.Work as correction
After the completion of data initialization, it is normal aobvious that receiver module 321 is connected together beginning by selecting switch 322 again with sending module 324
Show.
The driver element of LED display module 310 include data decoder 312, multiple current controller 313-1 to 313-N,
Multiple tabilized current power supply 314-1 to 314-N, display driver 315 and multiple output channel 316-1 to 316-N.Data are decoded
Device 312 receives the data from sending module 324, and which is decoded.Correction data is provided by data decoder 312 respectively
To multiple current controller 313-1 to 313-N to realize the calibration function of LED display, and display data is supplied to aobvious
Show driver 315, for realizing the image display function of LED display.Each in current controller 313-1 to 313-N
It is connected respectively to corresponding one in tabilized current power supply 314-1 to 314-N.Display driver 315 is connected to multiple adjustable constant-flows
Source 314-1 to 314-N.
Every time on independent correction LED display module during electricity, selecting switch 322 is by sending module 324 and data storage mould
Block 323 links together, and correction data is sent to each LED display module 310.Data solution in LED display module 310
Code device 312 is decoded to correction data, and the correction data of decoding is sent to multiple current controller 313-1 to 313-N.
Corresponding one in value adjustment tabilized current power supply 314-1 to 314-N of the current controller 313-1 to 313-N based on correction data
Output current value.In an embodiment of the present invention, the adjusting range of tabilized current power supply 314 be demarcate passage output current ±
20%, it is further preferred for ± 10%.By electric current fine setting being carried out to each output channel 316-1 to 316-N, realize LED
The current correction function of display screen module.Adjusted by the maximum output current to each output channel 316-1 to 316-N
It is whole, the luminous ratio of RGB light in LED chip is can adjust, so as to realize showing the adjustment of white balance.By to each output
The maximum output current of passage 316-1 to 316-N is adjusted, and can compensate for the emission difference of each LED chip, so as to realize
The pointwise correction that LED screen shows.
After the completion of correction data initialization, receiver module 321 and sending module 324 are connected to one by selecting switch 322
Rise, the display data received from outside display control program is sent to into LED display module 310, in LED display module 310
Data decoder 312 is decoded to display data, and by decoded data is activation to display driver 315, so as to realize
The image display function of LED array.
Fig. 5 illustrates that the display with electric current adjustment function of LED display module according to an embodiment of the invention drives dress
Put 500 block diagram.
Display drive apparatus 500 include multiple output channel 510-1 to 510-N, data decoder 520, multiple electric current controls
Register 530-1 to 530-N processed, multiple tabilized current power supply 540-1 to 540-N, display driver 550.Multiple output channels
510-1 to 510-N is connected to LED array and provides it constant current.
During the correction data of independent correction LED display module is initialized, data decoder 520 receives correction data
And decoded, the correction data of decoding is sent to into multiple current control register 530-1 to 530-N.Based on multiple electric currents
Corresponding one in the correction value data adjustment tabilized current power supply 540-1 to 540-N stored in control register 530-1 to 530-N
Individual output current maximum, realizes the current correction function of LED display.
After the completion of independent correction LED display module correction data initialization, data decoder 520 receives display data
And decoded, by decoded data is activation to display driver 550, so as to realize the image display function of LED array.
As independent correction LED display module carries Corrective control module and data memory module, in independent correction LED
Correction data is write in data memory module when display screen module is dispatched from the factory, independent correction LED display module can carry its school
Correction data, when complete independent correction LED display screen system is assembled into, each independent correction LED display module passes through school first
The correction data that positive control module is read on each data memory module is corrected, without the need in LED display erecting bed
Carry out large-size screen monitors correction.Before dispatching from the factory, independent correction LED display module enters in lighttight closing LED shows correction system
Correction is gone so that each independently corrects each characteristics of luminescence unification of LED display module, so as to meet factory calibration.With it is existing
Some LED giant-screens straightened up in places are compared, and independent correction LED display module disclosed by the invention can be shown in specific LED
Correction is completed in correction system, extraneous various uncertain factor (for example, bad weather, peripheral obstacles are on the one hand avoided
Block, veiling glare etc.) impact, on the other hand compared with LED giant-screen straightened up in places, the picture of single calibration of the invention
Prime number amount wants much less, therefore correction accuracy to be greatly improved.
As all independent correction LED display modules are initialized when dispatching from the factory, i.e., independent correction LED display module
Its own correction data is carried so that without the need for again in follow-up maintenance or when more renewing independent correction LED display module
Correction data is obtained, so that the maintenance of LED display or renewal work become simple and convenient, generally, is no longer needed
The maintenance personal of LED display manufacturer is wanted to be in the action, terminal use can voluntarily complete maintenance work.
The solution of the present invention need to resend correction data when solving maintenance or replacing module, and this was not only loaded down with trivial details but also time-consuming
Work.Such as it is stored in display control program using traditional approach, i.e. correction data, as correction data amount is than larger, by
In the intrinsic heterogeneity factor of display screen LED pixel point, the correction data of each module is different in addition so that LED shows
The maintenance work of display screen is extremely complex, and by the solution of the present invention, more changing jobs for LED display is greatly simplified, and realization " tears old open
Renew ".
In addition, the scheme of each embodiment of the invention understands, constant current output of the present invention by adjustment driver element
On passage, the output current of tabilized current power supply realizes the pointwise correction of LED screen compensating the emission difference of each LED die,
With in prior art by adjusting the dutycycle of each output channel come, compared with realizing the scheme of screen correction, the solution of the present invention can
Adjust scope wide, Adjustment precision is high.
Although described above is various embodiments of the present invention, however, it is to be understood that they are intended only as example to present
, and without limitation.For those skilled in the relevant art it is readily apparent that various combinations, modification can be made to which
With change without departing from the spirit and scope of the present invention.Therefore, the width and scope of the invention disclosed herein should not be gone up
State disclosed exemplary embodiment to be limited, and should define according only to appended claims and its equivalent.
Claims (10)
1. it is a kind of independently to correct driving means, including：
One or more driver elements, one or more of driver elements are used to drive LED pixel array；
Corrective control module, one end of the Corrective control module are connected to one or more of driver elements, the correction
The other end of control module receives display data, wherein the Corrective control module includes data memory module, the data are deposited
Storage module is used for the correction data of each pixel for storing the LED pixel array.
2. it is as claimed in claim 1 independently to correct driving means, it is characterised in that the Corrective control module also includes：
Receiver module；
Sending module, the sending module are connected to one or more of driver elements；
Selecting switch, the selecting switch are used to the sending module to be connected to the receiver module or the data selectively
Memory module.
3. it is as claimed in claim 1 independently to correct driving means, it is characterised in that the driver element includes：
Data decoder, the data decoder are connected to the Corrective control module；
Multiple current controllers, each in the plurality of current controller are connected to the data decoder；
Multiple tabilized current power supplies, each in the plurality of tabilized current power supply are connected to correspondence in the plurality of current controller
One.
4. it is as claimed in claim 3 independently to correct driving means, it is characterised in that the current controller is that current control is posted
Storage, the tabilized current power supply adjust the output of the tabilized current power supply based on the numerical value stored in the current control register
Electric current.
5. correction driving means as claimed in claim 4 independent, it is characterised in that the adjusting range of the tabilized current power supply is
Demarcate ± the 20% of output current.
6. correction driving means as claimed in claim 4 independent, it is characterised in that the adjusting range of the tabilized current power supply is
Demarcate ± the 10% of output current.
7. it is as claimed in claim 3 independently to correct driving means, it is characterised in that the driver element also includes that display drives
Device, one end of the display driver are connected to decoder described in data, and the other end is connected to the plurality of tabilized current power supply.
8. the independence as described in any one of aforementioned claim corrects driving means, it is characterised in that whenever the independence
In correction driving means during electricity, the independent correction driving means are corrected data initialization first, then the independent school
Positive driving means enter normal displaying mode.
9. it is as claimed in claim 8 independently to correct driving means, it is characterised in that during correction data is initialized, described
The correction data that Corrective control module is stored in reading data memory module, and correction data is sent to into the data decoding
Device, the data decoder are decoded to correction data, and the correction data of decoding is sent to the plurality of current control
Device.
10. it is as claimed in claim 8 independently to correct driving means, it is characterised in that during normal displaying mode, the school
The display data is sent to the data decoder by positive control module, and the data decoder is carried out to the display data
Decoding, and by decoded data is activation to the display driver.
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| CN201710049146.9A CN106548749A (en) | 2017-01-23 | 2017-01-23 | Independent correction driving means |
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| CN201710049146.9A CN106548749A (en) | 2017-01-23 | 2017-01-23 | Independent correction driving means |
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| CN106898295A (en) * | 2017-04-13 | 2017-06-27 | 上海得倍电子技术有限公司 | LED shows correction system |
| CN109272968A (en) * | 2018-11-21 | 2019-01-25 | 维沃移动通信有限公司 | A kind of screen nonuniformity calibration method and terminal device |
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| KR20140055030A (en) * | 2012-10-30 | 2014-05-09 | 엘지디스플레이 주식회사 | Method and apparatus for converting data, method and apparatus for driving of flat panel display device |
| CN103268752A (en) * | 2013-05-23 | 2013-08-28 | 无锡市崇安区科技创业服务中心 | LED display screen brightness and chrominance correction system |
| CN203276791U (en) * | 2013-05-23 | 2013-11-06 | 无锡市崇安区科技创业服务中心 | Brightness and chrominance correction system of LED display screen |
| CN206558186U (en) * | 2017-01-23 | 2017-10-13 | 上海得倍电子技术有限公司 | Independent correction drive device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106898295A (en) * | 2017-04-13 | 2017-06-27 | 上海得倍电子技术有限公司 | LED shows correction system |
| CN109272968A (en) * | 2018-11-21 | 2019-01-25 | 维沃移动通信有限公司 | A kind of screen nonuniformity calibration method and terminal device |
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