CN104851390A - LED display pointwise correction method - Google Patents
LED display pointwise correction method Download PDFInfo
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- CN104851390A CN104851390A CN201510260709.XA CN201510260709A CN104851390A CN 104851390 A CN104851390 A CN 104851390A CN 201510260709 A CN201510260709 A CN 201510260709A CN 104851390 A CN104851390 A CN 104851390A
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Abstract
The invention relates to an LED display pointwise correction method. The method comprises the following steps: obtaining already stored pointwise correction coefficients and already stored correction target values of multiple LED pixel points; obtaining initial brightness information or bright color degree information of the multiple LED pixel points through reverse computation by use of the already stored pointwise correction coefficients and the already stored correction target values; setting new correction target values different from the already stored correction target values; and calculating new pointwise correction coefficients of the multiple LED pixel points by use of the initial brightness information or the bright color degree information of the multiple LED pixel points and the new correction target values. Therefore, the LED display pointwise correction method can recalculate new correction coefficients after the correction target values are changed according to the existing correction coefficients and the existing correction target values, neither requires correction personnel to erect correction equipment for recalibration nor requires storage of too much original data, saves the time, is low in cost, simple to operate and easy to realize, and achieves an immediate effect in case of a change.
Description
Technical field
The present invention relates to LED and show alignment technique field, particularly a kind of LED display pointwise correction method.
Background technology
A kind of flat panel display equipment that LED display is made up of LED dot matrix, along with the fast development of the sector, LED display is widely applied to each occasion of daily life, it is adjustable that it has brightness range, safety and environmental protection, economize energy, bright in luster, visual range is large, a series of advantages such as content is clear, compare the information media that other are traditional, its content is easy to upgrade, with low cost, ageing good, distinct smooth colored moving frame more easily attracts the eyeball of people simultaneously, in the display and propagation of information, there is the incomparable advantage of other media.At present, LED display is just towards the future development of more high brightness, more high weather resistance, higher luminous density, and meanwhile people are also increasingly strict to the requirement of its display quality.
Because the links such as lamp, welding, structural design, heat radiation, brightness sacrifice that select of LED display all may have influence on the homogeneity of display screen, which results in the brightness of LED display, uniformity of chromaticity is a great problem in industry always.Under this background, pointwise correction technology looks for another way, and it is not intervened in the manufacture link of display screen, but measures in display screen manufacture terminal brightness, colourity and correct.Current pointwise correction is conventional to be defined as: by gathering brightness (and colourity) data of the every LED lamp point in LED display, draw the correction coefficient (such as the matrix of coefficients of each LED pixel) for every LED lamp point, fed back to the control system of LED display, realized driving the point-to-point otherness of every LED lamp by control system correction coefficient, thus significantly improve pixel intensity and the uniformity of chromaticity of LED display.
Along with the development of LED display pointwise correction technology, the efficiency of pointwise correction and effect have had and have promoted significantly, and increasing producer, dealer or customer selecting pointwise correction technology improve display quality, improve satisfaction.But sometimes after the display screen of pointwise correction transports to scene, client may to color not too satisfaction, particularly white picture, namely the correction target value chosen during pointwise correction is unreasonable, now just needs to change correction target value, recalculates correction coefficient.
Therefore, prior art has proposition: when carrying out pointwise correction for the first time, preserves the initial bright chroma data of all LED point, directly uses the initial bright chroma data of having preserved when recalculating correction coefficient.But along with the LED pixel quantity of LED display increases, the original bright chroma quantity of information of LED point can sharply increase.If these information and correction coefficient are kept at same file, so file takes up room and can very greatly, easily cause correction coefficient to damage, and generally user only needs to preserve correction coefficient, and file is the sense of conference experience lf being influenced too; If these information and correction coefficient are stored in different files, there is file equally and to take up room larger problem, and be not easy to management.
Summary of the invention
In view of this, for overcoming deficiency of the prior art, the present invention proposes a kind of LED display pointwise correction method.
Particularly, a kind of LED display pointwise correction method that one embodiment of the invention provides, comprises step: obtain the pointwise correction coefficient of preservation of multiple LED pixel and preserved correction target value; Preserve pointwise correction coefficient described in utilization and describedly preserved initial luminance data or the bright chroma information that correction target value inverse goes out described multiple LED pixel; The new correction target value of correction target value has been preserved described in setting is different from; And utilize the described initial luminance data of described multiple LED pixel or bright chroma information and described new correction target value to calculate the new pointwise correction coefficient of described multiple LED pixel.
In addition, a kind of LED display pointwise correction method that another embodiment of the present invention provides, comprise step: obtain the pointwise correction coefficient of preservation of multiple LED pixel and preserved gamma correction desired value, wherein said gamma correction desired value of having preserved is that ratio is sacrificed in brightness value or brightness; Preserve pointwise correction coefficient described in utilization and describedly preserved the initial luminance data that gamma correction desired value inverse goes out described multiple LED pixel; The new gamma correction desired value of gamma correction desired value has been preserved described in setting is different from; And utilize the described initial luminance data of described multiple LED pixel and described new gamma correction desired value to calculate the new pointwise correction coefficient of described multiple LED pixel.
In addition, a kind of LED display pointwise correction method that further embodiment of this invention provides, is characterized in that, comprise step: obtain the pointwise correction coefficient of preservation of multiple LED pixel and preserved bright chroma correction target value; Preserve pointwise correction coefficient described in utilization and describedly preserved the initial bright chroma information that bright chroma correction target value inverse goes out described multiple LED pixel; The new bright chroma correction target value of bright chroma correction target value has been preserved described in setting is different from; And utilize the described initial bright chroma information of described multiple LED pixel and described new bright chroma correction target value to calculate the new pointwise correction coefficient of described multiple LED pixel.
From above-described embodiment, LED display pointwise correction method provided by the invention can recalculate the correction coefficient made new advances according to existing correction coefficient and correction target value after change correction target value, do not need correction personnel to set up calibration equipment again to correct, also without the need to preserving too much raw data, saving time, cost is low, simple to operate, easy realization, namely changing and can see effect.
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 a kind of LED display pointwise bright chroma bearing calibration of the embodiment of the present invention.
Fig. 2 is the process flow diagram of a kind of LED display brightness point by point bearing calibration 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.
[the first embodiment]
Refer to Fig. 1, a kind of LED display pointwise correction method that first embodiment of the invention provides is the bearing calibration of pointwise bright chroma, and it such as comprises step S11, S13, S15 and S17, particularly:
Step S11: obtain the pointwise correction coefficient of preservation of multiple LED pixel and preserved bright chroma correction target value.Herein, for LED full-color display screen, each the LED pixel in multiple LED pixel generally includes redness (R), green (G) and blue (B) three kinds of color LED points; It is appreciated of course that, for LED mono-/double-color display screen, each LED pixel is then comprise a kind of color/two kind of color LED point.The present embodiment preserve the current bright chroma correction coefficient matrix that pointwise correction coefficient is described multiple LED pixel, correspondingly, the bright chroma correction target value (also brightness target value and colorimetric targets value) of bright chroma correction target value for having used when pointwise correction coefficient has been preserved in calculating has been preserved; Described preserved pointwise correction coefficient and preserved bright chroma correction target value be such as kept on PC with the form of Single document or multiple file.In addition, the preserving pointwise correction coefficient and usually also can be solidificated in the control system of LED display of the present embodiment, with by having preserved the view data of pointwise correction coefficient to input described in control system to carry out bright chroma adjustment.
Step S13: preserved pointwise correction coefficient described in utilization and describedly preserved the initial bright chroma information that bright chroma correction target value inverse goes out described multiple LED pixel.Herein, suppose that the initial tristimulus values matrix of certain the LED pixel in LED full-color display screen is for [XYZ_original], target tristimulus values matrix is [XYZ_target], then pointwise correction matrix of coefficients [Coefficients] is:
[Coefficients]＝[XYZ_target]*[XYZ_original]
-1
Wherein, [Coefficients] is the matrix of a 3*3, has 9 values, and namely each LED pixel has 9 correction coefficient values.
Otherwise, if know correction coefficient matrix [Coefficients] (correspondence has preserved pointwise correction coefficient) and target tristimulus values matrix [XYZ_target] (correspondence has preserved bright chroma correction target value), then can go out initial tristimulus values matrix [XYZ_original] (corresponding initial bright chroma information) and be by inverse:
[XYZ_original]＝[Coefficients]
-1*[XYZ_target]
Step S15: the new bright chroma correction target value having preserved bright chroma correction target value described in setting is different from.Herein, suppose that user is unsatisfied with the current shown color effects of described multiple LED pixel, it can change current bright chroma correction coefficient matrix (correspondence has preserved pointwise correction coefficient) by setting new bright chroma correction target value, realizes the adjustment to shown color effects whereby.Usually, each colour brightness desired value and colorimetric targets value that bright chroma correction target value comprises has been preserved for aforementioned, wherein the value of the brightness target value of each color is generally the public brightness value of corresponding color of the original brightness being less than the multiple LED pixels used when pointwise correction coefficient has been preserved in calculating, the scope of the colour triangle corresponding to colorimetric targets value of each color is generally the scope (corresponding public chromatic value) of the common color gamut of the original colorimetric being less than the multiple LED pixels used when pointwise correction coefficient has been preserved in calculating, also the scope of common color gamut is namely positioned at, public brightness value and public chromatic value form the public light tone angle value of the original bright chroma calculating the multiple LED pixels used when having preserved pointwise correction coefficient herein, therefore, preferably, aforementioned preserved pointwise correction coefficient and preserved bright chroma correction target value preserve while, preserve above-mentioned public light tone angle value in the lump, correspondingly, when setting new bright chroma correction target value, confirm that new bright chroma correction target value has preserved public light tone angle value described in being no more than, to guarantee that described multiple LED pixel can both correct to new bright chroma correction target value.
Step S17: utilize the described initial bright chroma information of described multiple LED pixel and described new bright chroma correction target value to calculate the new pointwise correction coefficient of described multiple LED pixel.Herein, the initial bright chroma information of each LED pixel and new bright chroma correction target value are all such as represent with tristimulus values matrix.In addition, for LED full-color display screen, new pointwise correction coefficient typically is the bright chroma correction coefficient matrix of 3*3.Afterwards, described new pointwise correction coefficient is applied to the control system of LED display, the color effects shown by above-mentioned multiple LED pixels of described LED display can be adjusted to desired effects.
In brief, can learn from above-mentioned steps S11 ~ S17: when preserving data/file, preserve pointwise correction matrix of coefficients and target tristimulus values matrix, compare simple correction coefficient matrix file and merely add a target tristimulus values matrix, and when needing to change bright chroma correction target value, only need according to correction coefficient matrix and the initial tristimulus values matrix of target tristimulus values matrix pointwise inverse, then new according to newly-installed bright chroma correction target value node-by-node algorithm bright chroma correction coefficient matrix.
It is worth mentioning that, state in the pointwise bright chroma bearing calibration of the first embodiment on the invention, preserved correction target value to be not limited to adopt the form of tristimulus values matrix to preserve, also the brightness of replaceable one-tenth shades of colour and the form of chromaticity coordinates value are preserved for they.It will be appreciated by persons skilled in the art that brightness and chromaticity coordinates value and tristimulus values matrix can be changed mutually.
[the second embodiment]
Refer to Fig. 2, a kind of LED display pointwise correction method that second embodiment of the invention provides is brightness point by point bearing calibration, and it such as comprises step S21, S23, S25 and S27, particularly:
Step S21: obtain the pointwise correction coefficient of preservation of multiple LED pixel and preserved gamma correction desired value; In the present embodiment, preserved gamma correction desired value such as ratio is sacrificed in brightness value or brightness, the ratio of sacrificing of brightness is herein such as the sacrifice ratio mean value of the original brightness of the multiple LED pixels used when having preserved pointwise correction coefficient described in calculating or minimum value being changed to gamma correction desired value.
Step S23: preserved pointwise correction coefficient described in utilization and describedly preserved the initial luminance data that gamma correction desired value inverse goes out described multiple LED pixel;
Step S25: the new gamma correction desired value of having preserved gamma correction desired value described in setting is different from; And
Step S27: utilize the described initial luminance data of described multiple LED pixel and described new gamma correction desired value to calculate the new pointwise correction coefficient of described multiple LED pixel.
It will be appreciated by persons skilled in the art that brightness point by point corrects to correct more simply compared to pointwise bright chroma, it is correcting luminance part only, and does not correct chrominance section; Therefore with reference to abovementioned steps S11 ~ S17, no longer step S21 ~ S27 can be described in detail at this.
Moreover, from above-mentioned first embodiment and the second embodiment, pointwise correction can divide into gamma correction and bright chroma corrects two kinds, therefore preferably, aforementioned preserved pointwise correction coefficient and preserved (bright chroma or brightness) correction target value preserve while, the information of a preservation pointwise correction pattern can be associated, thus while abovementioned steps S11/S21 acquisition has been preserved pointwise correction coefficient and preserved bright chroma/gamma correction desired value, the pointwise correction pattern of having preserved can be obtained in the lump, increase the execution convenience of the LED display pointwise correction method of the embodiment of the present invention whereby.
In sum, the LED display pointwise correction method of the above embodiment of the present invention can recalculate the correction coefficient made new advances according to existing correction coefficient and correction target value after change correction target value, do not need correction personnel to set up calibration equipment again to correct, also without the need to preserving too much raw data, saving time, cost is low, simple to operate, easy realization, namely changing and can see effect.
So far, apply specific case herein and set forth a kind of LED display pointwise correction side ratio juris of the present invention and embodiment, 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 (10)
1. a LED display pointwise correction method, is characterized in that, comprises step:
Obtain the pointwise correction coefficient of preservation of multiple LED pixel and preserved correction target value;
Preserve pointwise correction coefficient described in utilization and describedly preserved initial luminance data or the bright chroma information that correction target value inverse goes out described multiple LED pixel;
The new correction target value of correction target value has been preserved described in setting is different from; And
The described initial luminance data of described multiple LED pixel or bright chroma information and described new correction target value is utilized to calculate the new pointwise correction coefficient of described multiple LED pixel.
2. LED display pointwise correction method as claimed in claim 1, is characterized in that, also comprise step:
Obtain the public brightness value of preservation of described multiple LED pixel or public light tone angle value; And
Confirm that described new correction target value has preserved public brightness value or public light tone angle value described in being no more than.
3. LED display pointwise correction method as claimed in claim 1, it is characterized in that, described correction target value of having preserved preserves with the form of tristimulus values matrix.
4. LED display pointwise correction method as claimed in claim 1, is characterized in that, described correction target value of having preserved preserves with the form of brightness and chromaticity coordinates value.
5. LED display pointwise correction method as claimed in claim 1, is characterized in that, also comprise step:
Obtain and preserved pointwise correction coefficient with described and preserved correction target value and associate the pointwise correction pattern of preserving;
When described pointwise correction pattern is brightness point by point timing, preserve pointwise correction coefficient described in utilization and describedly preserved the described initial luminance data that correction target value inverse goes out described multiple LED pixel, and having utilized the described initial luminance data of described multiple LED pixel and described new correction target value to calculate the new pointwise correction coefficient of described multiple LED pixel; And
When described pointwise correction pattern is pointwise bright chroma timing, preserve pointwise correction coefficient described in utilization and describedly preserved the described initial bright chroma information that correction target value inverse goes out described multiple LED pixel, and having utilized the described initial bright chroma information of described multiple LED pixel and described new correction target value to calculate the new pointwise correction coefficient of described multiple LED pixel.
6. a LED display pointwise correction method, is characterized in that, comprises step:
Obtain the pointwise correction coefficient of preservation of multiple LED pixel and preserved gamma correction desired value, wherein said gamma correction desired value of having preserved is that ratio is sacrificed in brightness value or brightness;
Preserve pointwise correction coefficient described in utilization and describedly preserved the initial luminance data that gamma correction desired value inverse goes out described multiple LED pixel;
The new gamma correction desired value of gamma correction desired value has been preserved described in setting is different from; And
The described initial luminance data of described multiple LED pixel and described new gamma correction desired value is utilized to calculate the new pointwise correction coefficient of described multiple LED pixel.
7. LED display pointwise correction method as claimed in claim 6, is characterized in that, comprise step:
Obtain the public brightness value of preservation of described multiple LED pixel; And
Confirm that described new gamma correction desired value has preserved public brightness value described in being no more than.
8. a LED display pointwise correction method, is characterized in that, comprises step:
Obtain the pointwise correction coefficient of preservation of multiple LED pixel and preserved bright chroma correction target value;
Preserve pointwise correction coefficient described in utilization and describedly preserved the initial bright chroma information that bright chroma correction target value inverse goes out described multiple LED pixel;
The new bright chroma correction target value of bright chroma correction target value has been preserved described in setting is different from; And
The described initial bright chroma information of described multiple LED pixel and described new bright chroma correction target value is utilized to calculate the new pointwise correction coefficient of described multiple LED pixel.
9. LED display pointwise correction method as claimed in claim 8, is characterized in that, also comprise step:
Obtain the public light tone angle value of preservation of described multiple LED pixel; And
Confirm that described new correction target value has preserved public light tone angle value described in being no more than.
10. LED display pointwise correction method as claimed in claim 8, is characterized in that, described correction target value of having preserved preserves with the form of tristimulus values matrix or with the form of brightness and chromaticity coordinates value.
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