CN104778920A - Splicing bright and dark line compensating method of LED display screen - Google Patents
Splicing bright and dark line compensating method of LED display screen Download PDFInfo
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- CN104778920A CN104778920A CN201510191341.6A CN201510191341A CN104778920A CN 104778920 A CN104778920 A CN 104778920A CN 201510191341 A CN201510191341 A CN 201510191341A CN 104778920 A CN104778920 A CN 104778920A
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Abstract
The invention relates to a splicing bright and dark line compensating method of an LED display screen. The splicing bright and dark line compensating method comprises the following steps as follows: (a) determining a plurality of LED pixel points at a position of a splicing bright and dark line in the LED display screen established by a plurality of splicing units; (b) regulating the brightness of the LED pixel points so as to compensate the splicing bright and dark line to a target effect and update correction coefficients of the LED pixel points from initial values to target values; (c) after the splicing bright and dark line is compensated to the target effect, storing positions of the LED pixel points and corresponding brightness adjustment amount so as to obtain a bright and dark line compensating file; (d) before the LED display screen is detached into the splicing units, calculating reverse brightness adjustment amount of the LED pixel points according to the bright and dark line compensating file, and reducing the correction coefficients of the LED pixel points from the target values to the initial values according to the reverse brightness adjustment amount. Through the adoption of the splicing bright and dark line compensating method, the bright and dark line problem caused by splicing on a spot can be rapidly solved; after the LED display screen is detached, an original state can be restored, without affecting the subsequent use.
Description
Technical field
The present invention relates to display technique field, the particularly bright concealed wire compensation method of a kind of splicing of LED display.
Background technology
LED lease screen is generally made up of the batch casing purchased at times, and the luminance difference, color gamut space difference etc. of different batches casing result in full screen image quality decrease; Now, LED display brightness point by point chromaticity correction can be adopted to improve bright chroma homogeneity.
Current LED display pointwise correction technical scheme is gradually improved, corrected by the whole screen in initial scene and derive present product line alignment technique, i.e. casing alignment technique, it can be guaranteed to dispatch from the factory the homogeneity of LED screen body, reduce technical support cost, and straightened up in place efficiency is higher relatively, be not subject to the restriction in time and place, cost is also lower.Therefore, along with the development of LED display production firm, casing alignment technique manufactures a part indispensable in link by becoming LED display, has a good application prospect.
Casing alignment technique can solve the non-uniformity of following two aspects: one is the uniformity among pixels of box house, and two is the bright chroma consistance between casing.Through a collection of casing that casing corrects, the inside bright chroma homogeneity of casing is fine, bright chroma difference between the rear box of splicing and casing is also very little, but due to the restriction of the technological reason such as machining accuracy, splicing accuracy, there is slight inconsistent phenomenon in spacing when screen is taken at scene between casing and casing, after the low-pass filtering process through human visual system, bright line or concealed wire is just there will be (at this when showing, be referred to as the bright concealed wire of splicing), Small Distance display screen is particularly evident.
As can be seen here, casing alignment technique is introduced the correction of lease casing, the problem of casing lack of homogeneity when lessor delivers can be solved, but still there will be the problem of splicing bright concealed wire when using at the scene.
Summary of the invention
Therefore, for realizing defect and the deficiency of prior art existence, the invention provides a kind of bright concealed wire compensation method of splicing of LED display.
Particularly, the bright concealed wire compensation method of splicing of a kind of LED display provided by the invention, comprises step: (a) determines to splice in the LED display built by multiple concatenation unit multiple LED pixels of bright concealed wire position; B () regulates the brightness of described multiple LED pixel, to target effect the correction coefficient of described multiple LED pixel is updated to desired value from initial value to compensate the bright concealed wire of splicing; C (), after the bright concealed wire of compensation splicing reaches target effect, position and the corresponding brightness adjustment of preserving described multiple LED pixel compensate file to obtain bright concealed wire; And (d) is for before being split into described multiple concatenation unit by described LED display, utilizes described bright concealed wire to compensate file and calculates the reverse regulated quantity of brightness of described multiple LED pixel and utilize described brightness reverse regulated quantity that the correction coefficient of described multiple LED pixel is reduced to described initial value from described desired value.
In one embodiment of the invention, in above-mentioned steps (a), described multiple LED pixel is distributed in the both sides of the bright concealed wire of corresponding splicing and is respectively the edge pixel point of corresponding person in described multiple concatenation unit.
In one embodiment of the invention, above-mentioned steps (b) comprising: the brightness data that described LED display carries out corresponding described multiple LED pixel in the view data of picture display is delivered in adjustment tendency to develop, thus realizes the brightness regulating described multiple LED pixel.
In another embodiment of the present invention, above-mentioned steps (b) comprising: the display control card to described LED display provides the brightness adjustment of corresponding described multiple LED pixel, described brightness adjustment to be acted on by described display control card the brightness correction coefficients of described multiple LED pixel, thus realize the brightness regulating described multiple LED pixel.
In one embodiment of the invention, above-mentioned brightness adjustment is for regulating matrix, and the reverse regulated quantity of brightness is described adjustment inverse of a matrix matrix.
In one embodiment of the invention, when described correction coefficient is bright chroma correction coefficient matrix, the component value of the chromaticity correction coefficient in described adjustment matrix in corresponding described bright chroma correction coefficient matrix is 0 and the component value of brightness correction coefficients in corresponding described bright chroma correction coefficient matrix is non-zero and equal.
In one embodiment of the invention, above-mentioned steps (d) comprising: the display control card reverse for described brightness regulated quantity being sent to described LED display, reverse for described brightness regulated quantity to be acted on by described display control card the described desired value of the correction coefficient of described multiple LED pixel, thus realize the correction coefficient of described multiple LED pixel to be reduced to described initial value from described desired value.
In one embodiment of the invention, above-mentioned multiple concatenation unit is respectively LED box, and wherein single led casing comprises at least one receiving card of at least one LED lamp panel and band year described LED lamp panel.
As from the foregoing, the embodiment of the present invention can select the LED pixel that there is bright line or concealed wire position, regulates its correction coefficient, can quick solution on-the-spot owing to splicing the bright concealed wire problem brought; The bright concealed wire preserved compensates the correction coefficient of reduction concatenation unit (such as LED box) when file can be used for tearing screen open, concatenation unit is returned to the state before adjustment, does not affect follow-up use.
By the detailed description below with reference to accompanying drawing, other side of the present invention and feature become obvious.But it should be known that this accompanying drawing is only the object design of explanation, instead of as the restriction of scope of the present invention, this is because it should with reference to additional claim.Should also be appreciated that, unless otherwise noted, unnecessaryly draw accompanying drawing to scale, they only try hard to structure described herein and flow process are described conceptually.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Fig. 1 is the process flow diagram of the bright concealed wire compensation method of splicing of a kind of LED display of the embodiment of the present invention.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.
Refer to Fig. 1, the bright concealed wire compensation method of splicing of a kind of LED display that the embodiment of the present invention provides comprises step S11, S13, S15 and S17, specific as follows:
Step S11: determine the multiple LED pixels splicing bright concealed wire position in the LED display built by multiple concatenation unit.In the present embodiment, multiple concatenation unit is such as LED box, but the present invention is not as limit; Single led casing comprises one or more receiving cards (one of display control card) of one or more LED lamp panel and band year described LED lamp panel, and at this, receiving card is also often referred to as scanning card in the art; LED pixel can be single primary color pixels point, dual base color pixel, three primary colours pixel or more primary color pixels point, wherein adopts the LED pixel of red, green, blue three primary colours the most common.For determining the multiple LED pixels splicing bright concealed wire position, a kind of typical way is: the display control card such as sending card to LED display sends the monochrome large with the resolution of the appointed area of LED display etc. or solid-color image data, referred to herein as compensation view data, in compensation view data to should the brightness data of all LED pixels of appointed area all equal, also be brightness data indifference, sending card receives compensation view data and carries out sending to the corresponding receiving card of LED display to carry out picture display after necessary data are changed, the position of splicing bright concealed wire can be determined afterwards by human eye vision or machine vision, and then the position (such as adopting zone location of the prior art and point location technology) of the multiple LED pixels splicing bright concealed wire position can be determined, at this, appointed area can be full frame region, also can be regional area, in addition, for red, green, blue three-primary color LED pixel point, compensation view data is preferably white image data, and the monochromatic image data such as red, green or blue also can be adopted in certain practical application to determine to splice the position of multiple LED pixels of bright concealed wire position.At this, it is worth mentioning that, for the LED display application such as lease screen needing often to build and remove, the inside bright chroma homogeneity of each concatenation unit is better, bright chroma difference after splicing between concatenation unit and concatenation unit is also less, therefore splice the piece position that bright concealed wire mainly occurs in each concatenation unit, the LED pixel correspondingly splicing bright concealed wire position is then generally the edge pixel point of corresponding concatenation unit; In this case, when piece is excessive, then there will be splicing concealed wire, otherwise then there will be splicing bright line; Thus can compensate the bright concealed wire of splicing by regulating the brightness that the LED pixel of bright concealed wire both sides is such as spliced in the brightness of edge pixel, reaching and eliminating or the basic target effect eliminating the bright concealed wire of splicing.
Step S13: the brightness regulating described multiple LED pixel, is updated to desired value by the correction coefficient of described multiple LED pixel from initial value to target effect to compensate the bright concealed wire of splicing.In the present embodiment, when after the multiple LED pixels (also namely knowing the positional information of described multiple pixel) being determined to splice bright concealed wire position by step S11, the brightness of described multiple LED pixel is regulated, compensate the bright concealed wire of splicing whereby, to target effect, the correction coefficient of described multiple LED pixel is updated to desired value from initial value, specifically can adopt following two kinds of modes.
Mode (1): the adjusted post-compensation view data of brightness data regulating multiple LED pixels of the bright concealed wire position of corresponding splicing in the compensation view data of aforementioned brightness data indifference, the display control card will post-compensation view data being regulated to be sent to LED display again, picture display is carried out, for the compensation effect observing the bright concealed wire of splicing according to adjustment post-compensation view data by display control card; At this, the number of times of adjustment can be once also can be repeatedly, and concrete quantity then needs depending on whether bright for splicing concealed wire being compensated to target effect; Usually, regulate post-compensation view data relative to adjustment precompensation view data, except described multiple LED pixels of the bright concealed wire position of splicing, the brightness data of the LED pixel of other position remains unchanged.After bright for splicing concealed wire is compensated to target effect, the brightness adjustment of splicing each LED pixel in multiple LED pixels of bright concealed wire position just can be decided, brightness adjustment sent to the display control card of LED display to act on described multiple LED pixel respectively afterwards, whereby the correction coefficient of described multiple LED pixel is updated to desired value from initial value.
Mode (2): the display control card such as sending card to LED display sends the such as brightness regulation ratio of brightness adjustment each time of multiple LED pixels of the bright concealed wire position of corresponding splicing, by sending card, described brightness adjustment is acted on the correction coefficient of described multiple LED pixel, to upgrade the luminance component in correction coefficient; Meanwhile, sending card combines the correction coefficient after upgrading according to the compensation view data of aforementioned brightness data indifference and carries out picture display, for observing the compensation effect splicing bright concealed wire; At this, the number of times of brightness regulation can be once also can be repeatedly, and concrete quantity then needs depending on whether bright for splicing concealed wire being compensated to target effect.Usually, except described multiple LED pixels of the bright concealed wire position of splicing, the correction coefficient of the LED pixel of other position remains unchanged.After bright for splicing concealed wire is compensated to target effect, the correction coefficient of described multiple LED pixel is updated to desired value from initial value, and the brightness adjustment of each LED pixel in described multiple LED pixel also can be decided.
Step S15: after the bright concealed wire of compensation splicing reaches target effect, position and the corresponding brightness adjustment of preserving described multiple LED pixel compensate file to obtain bright concealed wire.In the present embodiment, the total brightness regulated quantity of the multiple LED pixels splicing bright concealed wire position can be obtained by abovementioned steps S13; And be realize follow-uply fast the correction coefficient of each concatenation unit of LED display being reduced when tearing screen open, at this, the position of multiple LED pixels of the bright concealed wire position of splicing and corresponding brightness adjustment are carried out preserve to form bright concealed wire and compensate file.
Step S17: for before described LED display is split into described multiple concatenation unit, utilizes described bright concealed wire to compensate file and calculate the reverse regulated quantity of brightness of described multiple LED pixel and utilize described brightness reverse regulated quantity that the correction coefficient of described multiple LED pixel is reduced to described initial value from described desired value.In the present embodiment, the bright concealed wire brightness adjustment compensated in file is such as regulate matrix, correspondingly the reverse regulated quantity of brightness is for regulating inverse of a matrix matrix, so, the reverse regulated quantity of brightness of each LED pixel of the bright concealed wire position of splicing is sent to the display control card such as sending card of LED display, by sending card, reverse for these brightness regulated quantity is acted on the correction coefficient of the LED pixel of correspondence position, then its correction coefficient can be reduced to initial value from aforementioned desired value; After correction coefficient is reduced to initial value, LED display can be split into multiple concatenation unit for follow-up use.For single led pixel for red, green, blue three primary colours pixel, the correction coefficient of LED pixel is generally the bright chroma correction coefficient matrix of nine components, and its expression formula can be:
Wherein, the a11 on diagonal line, a22, a33 are brightness correction coefficients (being also luminance component), and other a12, a13, a21, a23, a31, a33 are chromaticity correction coefficient (being also chromatic component); Correspondingly, the expression formula of brightness adjustment (adjustment matrix) can be:
Wherein, the component value of the chromaticity correction coefficient in brightness adjustment (adjustment matrix) in corresponding bright chroma correction coefficient matrix is 0 and the component value L1 of brightness correction coefficients in corresponding bright chroma correction coefficient matrix, L2 and L3 are non-zero and equal.
It is worth mentioning that at this, regulate the component value L1 of corresponding brightness correction coefficient in matrix, L2 and L3 also can unequal (such as corresponding aforementioned backoff view data be the situation of primary color image data); In addition, the preserving type of brightness adjustment is also not limited to regulate matrix-style, and also can change to other preserving types, such as, be that variable quantity and the position one_to_one corresponding of each correction coefficient is preserved.
In sum, the LED pixel that there is bright line or concealed wire position can be selected/determine to the above embodiment of the present invention, regulates its correction coefficient, can quick solution on-the-spot owing to splicing the bright concealed wire problem brought; The bright concealed wire preserved compensates the correction coefficient of reduction concatenation unit (such as LED box) when file can be used for tearing screen open, concatenation unit is returned to the state before adjustment, does not affect follow-up use.
So far, the principle and the embodiment that apply the bright concealed wire compensation method of the splicing of specific case to LED display of the present invention are herein set forth, and the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention; all will change in specific embodiments and applications; in sum, this description should not be construed as limitation of the present invention, and protection scope of the present invention should be as the criterion with appended claim.
Claims (8)
1. the bright concealed wire compensation method of the splicing of LED display, is characterized in that, comprise step:
A () determines the multiple LED pixels splicing bright concealed wire position in the LED display built by multiple concatenation unit;
B () regulates the brightness of described multiple LED pixel, to target effect the correction coefficient of described multiple LED pixel is updated to desired value from initial value to compensate the bright concealed wire of splicing;
C (), after the bright concealed wire of compensation splicing reaches target effect, position and the corresponding brightness adjustment of preserving described multiple LED pixel compensate file to obtain bright concealed wire; And
D (), for before described LED display is split into described multiple concatenation unit, utilizes described bright concealed wire to compensate file and calculates the reverse regulated quantity of brightness of described multiple LED pixel and utilize described brightness reverse regulated quantity that the correction coefficient of described multiple LED pixel is reduced to described initial value from described desired value.
2. the bright concealed wire compensation method of splicing as claimed in claim 1, it is characterized in that, in described step (a), described multiple LED pixel is distributed in the both sides of the bright concealed wire of corresponding splicing and is respectively the edge pixel point of corresponding person in described multiple concatenation unit.
3. the bright concealed wire compensation method of splicing as claimed in claim 1, it is characterized in that, described step (b) comprising:
The brightness data that described LED display carries out corresponding described multiple LED pixel in the view data of picture display is delivered in adjustment tendency to develop, thus realizes the brightness regulating described multiple LED pixel.
4. the bright concealed wire compensation method of splicing as claimed in claim 1, it is characterized in that, described step (b) comprising:
Display control card to described LED display provides the brightness adjustment of corresponding described multiple LED pixel, described brightness adjustment to be acted on by described display control card the brightness correction coefficients of described multiple LED pixel, thus realize the brightness regulating described multiple LED pixel.
5. the bright concealed wire compensation method of splicing as claimed in claim 1, is characterized in that, described brightness adjustment is for regulating matrix, and the reverse regulated quantity of described brightness is described adjustment inverse of a matrix matrix.
6. the bright concealed wire compensation method of splicing as claimed in claim 5, it is characterized in that, when described correction coefficient is bright chroma correction coefficient matrix, the component value of the chromaticity correction coefficient in described adjustment matrix in corresponding described bright chroma correction coefficient matrix is 0 and the component value of brightness correction coefficients in corresponding described bright chroma correction coefficient matrix is non-zero and equal.
7. the bright concealed wire compensation method of splicing as claimed in claim 1, it is characterized in that, described step (d) comprising:
Reverse for described brightness regulated quantity is sent to the display control card of described LED display, reverse for described brightness regulated quantity to be acted on by described display control card the described desired value of the correction coefficient of described multiple LED pixel, thus realize the correction coefficient of described multiple LED pixel to be reduced to described initial value from described desired value.
8. the bright concealed wire compensation method of splicing as claimed in claim 1, it is characterized in that, described multiple concatenation unit is respectively LED box, and wherein single led casing comprises at least one receiving card of at least one LED lamp panel and band year described LED lamp panel.
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| CN106373523A (en) * | 2016-11-21 | 2017-02-01 | 西安诺瓦电子科技有限公司 | Splicing bright/dark line compensation method |
| CN106373522A (en) * | 2016-11-21 | 2017-02-01 | 西安诺瓦电子科技有限公司 | Splicing bright/dark line adjustment method |
| CN106710517A (en) * | 2016-11-17 | 2017-05-24 | 西安诺瓦电子科技有限公司 | LED display screen correction method |
| CN107103874A (en) * | 2017-07-06 | 2017-08-29 | 苏州科达科技股份有限公司 | The spliced bright concealed wire bearing calibration of LED display and device |
| CN107689206A (en) * | 2016-08-03 | 2018-02-13 | 三星电子株式会社 | Display device and its control method |
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| CN110246425A (en) * | 2018-03-09 | 2019-09-17 | 深圳市奥拓电子股份有限公司 | Splice the adjusting method and LED mosaic display screen of bright concealed wire |
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| CN114267296A (en) * | 2021-11-24 | 2022-04-01 | 青岛维信诺电子有限公司 | Pixel circuit, working method thereof, display panel and display device |
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| CN105321467A (en) * | 2015-11-12 | 2016-02-10 | 西安诺瓦电子科技有限公司 | LED display screen control system, receiving card and spliced bright line and dark line correction method |
| CN105321469B (en) * | 2015-11-12 | 2018-01-12 | 西安诺瓦电子科技有限公司 | Splice bright concealed wire modification method |
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| CN110246425A (en) * | 2018-03-09 | 2019-09-17 | 深圳市奥拓电子股份有限公司 | Splice the adjusting method and LED mosaic display screen of bright concealed wire |
| CN110246425B (en) * | 2018-03-09 | 2021-07-09 | 深圳市奥拓电子股份有限公司 | Adjusting method for spliced bright and dark lines and LED spliced display screen |
| CN112068351A (en) * | 2020-09-01 | 2020-12-11 | 深圳市华星光电半导体显示技术有限公司 | Backlight module and display device |
| WO2022048029A1 (en) * | 2020-09-01 | 2022-03-10 | 深圳市华星光电半导体显示技术有限公司 | Backlight module and display apparatus |
| CN114267296A (en) * | 2021-11-24 | 2022-04-01 | 青岛维信诺电子有限公司 | Pixel circuit, working method thereof, display panel and display device |
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