CN103559864B - The bright chroma bearing calibration of LED display module - Google Patents
The bright chroma bearing calibration of LED display module Download PDFInfo
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- CN103559864B CN103559864B CN201310562332.4A CN201310562332A CN103559864B CN 103559864 B CN103559864 B CN 103559864B CN 201310562332 A CN201310562332 A CN 201310562332A CN 103559864 B CN103559864 B CN 103559864B
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Abstract
The present invention proposes a kind of bright chroma bearing calibration of LED display module, comprises step: the bright chroma information gathering at least one sample extracted from multiple LED display module; The public light tone angle value obtaining at least one sample described is analyzed to the bright chroma information of at least one sample described, and sets a bright chroma correction target value according to public light tone angle value; One of to gather in described multiple LED display module the bright chroma information of LED display module to be corrected; And the pixel correction coefficient of LED display module to be corrected is calculated according to the bright chroma information of LED display module to be corrected and described bright chroma correction target value.The present invention leads to oversampling acquisition to obtain public light tone angle value and to set bright chroma correction target value accordingly for the pixel correction coefficient generating LED display module to be corrected, even if the LED display module of different batches so can be made also can to have a higher bright chroma consistance.
Description
Technical field
The present invention relates to display alignment technique field, be specifically related to a kind of bright chroma bearing calibration of LED display module.
Background technology
LED display, as novel display technique, is accepted by market gradually with its energy-saving and environmental protection, the advantage such as highlighted, thus is widely used in the field such as city medium, urban transportation electronic mark board.
At present, along with going from strength to strength of LED display market, the demand corrected for different batches LED lamp panel or LED box gets more and more.After existing LED display bearing calibration is difficult to ensure to adopt the LED display of multiple batches of LED lamp panel or LED box to correct, bright chroma is consistent with homogeneity height, thus, when assembly LED display, the selection of LED lamp panel or LED box is made to be subject to a definite limitation.
Summary of the invention
Therefore, for overcoming the technological deficiency that prior art exists, the present invention proposes a kind of bright chroma bearing calibration of LED display module.
Particularly, the bright chroma bearing calibration of a kind of LED display module that the embodiment of the present invention proposes, comprises step: the bright chroma information gathering at least one sample extracted from multiple LED display module; To the described bright chroma information analysis of at least one sample described to obtain the public light tone angle value of at least one sample described, and set a bright chroma correction target value according to described public light tone angle value; One of to gather in described multiple LED display module the bright chroma information of LED display module to be corrected; And the pixel correction coefficient calculating described LED display module to be corrected according to the described bright chroma information of described LED display module to be corrected and described bright chroma correction target value is for the bright chroma correcting described LED display module to be corrected.
In one embodiment of the invention, above-mentioned LED display module to be corrected is the LED box with display control card, and above-mentioned bright chroma bearing calibration also comprises step: the described pixel correction coefficient of described LED display module to be corrected sent and be stored in the storer on the described display control card of described LED display module to be corrected.
In one embodiment of the invention, above-mentioned LED display module to be corrected is the LED lamp panel being provided with storer, and described bright chroma bearing calibration also comprises step: the described pixel correction coefficient of described LED display module to be corrected sent and be stored in the described storer of described LED display module to be corrected.
In one embodiment of the invention, above-mentioned bright chroma bearing calibration also comprises step: send and store described pixel correction coefficient to described LED display module to be corrected.
In one embodiment of the invention, above-mentioned bright chroma bearing calibration also comprises step: the identifier obtaining described LED display module to be corrected; And the described pixel correction coefficient of described LED display module to be corrected and described identifier are associated together and are stored to database.
In one embodiment of the invention, the above-mentioned step obtaining the identifier of described LED display module to be corrected comprises: utilize Software Create and obtain described identifier or scan the label of described LED display module to be corrected and obtain described identifier.
In one embodiment of the invention, the step of the bright chroma information of at least one sample that above-mentioned collection is extracted from multiple LED display module comprises: each sample controlled at least one sample described sequentially shows multiple different colored picture; And take described multiple different colored picture to obtain the described bright chroma information of at least one sample described.
In one embodiment of the invention, the described multiple different colored picture of above-mentioned shooting comprises with the step of the described bright chroma information obtaining at least one sample described: take the regional area of colored picture described in each to obtain the bright chroma information of described regional area, and using the described bright chroma information of the described bright chroma information of described regional area as corresponding sample.
In one embodiment of the invention, the above-mentioned step setting a bright chroma correction target value according to described public light tone angle value comprises: described public light tone angle value is set as described bright chroma correction target value.
In one embodiment of the invention, the above-mentioned step setting a bright chroma correction target value according to described public light tone angle value comprises: a light tone sacrifice number percent according to described public light tone angle value and setting obtains revised public light tone angle value, and using described revised public light tone angle value as described bright chroma correction target value.
In one embodiment of the invention, the step of the bright chroma information of at least one sample that above-mentioned collection is extracted from multiple LED display module comprises: be subordinated in described multiple LED display module of different batches and extract multiple sample; And gather the bright chroma information of described multiple sample.
As from the foregoing, the embodiment of the present invention obtains public light tone angle value by carrying out sampling collection bright chroma information to LED display module and carrying out analysis, then according to this public light tone angle value setting bright chroma correction target value for the pixel correction coefficient needed for follow-up generation LED display module to be corrected; Like this then even if the LED display module of different batches such as LED lamp panel or LED box can be made also can to have higher bright chroma consistance and homogeneity.
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
Fig. 1 is the public chromatic value acquisition pattern principle schematic that the bright chroma bearing calibration of a kind of LED display module of the embodiment of the present invention is associated.
Fig. 2 is the public chromatic value correcting mode principle schematic that the bright chroma bearing calibration of a kind of LED display module of the embodiment of the present invention is associated.
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.
Particularly, the bright chroma bearing calibration of a kind of LED display module that the embodiment of the present invention proposes, comprises the following steps S1 to step S4:
Step S1: the bright chroma information gathering at least one sample extracted from multiple LED display module.In the present embodiment, described multiple LED display module belongs to different batches, and at least one sample described is taken from different batches, and the quantity of the sample extracted in each batch can extract according to certain percentage.Single led display module comprises multiple pixel, and it can be LED lamp panel or LED box, and single led casing can comprise one or more LED lamp panel and usually with display control card; Preferably, LED lamp panel is the LED lamp panel being provided with storer such as flash memory; Single pixel comprises one or more LED, for the situation of multiple LED, it is such as comprise redness (R), green (G), blue (B) three kinds of color LED, even can also comprise white (W) LED or yellow (Y) LED, only can certainly comprise two kinds of color LED.In addition, for each LED display module of same batch, the same color LED that it adopts has identical or close material number usually, compares like this and can guarantee that the same color LED with in each pixel in batch each LED display module has the identical or close characteristics of luminescence.
In addition, in the process of bright chroma information gathering each sample at least one sample described, need to control each sample and sequentially show different colored picture, and be preferably sprite or pure color picture, such as control this sample first to show red picture, show green picture again, then show blue picture, even all right display white picture further; When various monochrome or the display of pure color picture, bright chroma collecting device is utilized to take to obtain the shades of colour correction image needed for correction to each picture, the shooting number of times of certain same color picture does not limit, as long as can photograph the image met the demands; The bright chroma information that graphical analysis can obtain this sample is carried out afterwards to taking shades of colour (such as R, G, B) the correction image obtained, be such as the primary colours bright chroma information of each pixel of this sample, comprise monochrome information and chrominance information.Wherein, monochrome information such as represents with brightness value, chrominance information such as represents with cie color coordinate, bright chroma collecting device is such as the combination of area array cameras and colorimeter, area array cameras wherein can be used for the relative bright chroma information of each pixel obtained in shades of colour picture, and colorimeter can be used for the accurate bright chroma information of the partial pixel point obtained in shades of colour picture, recycle the bright chroma information that the accurate bright chroma information of this partial pixel point and the difference of relative bright chroma information can obtain this sample after the relative bright chroma information of demarcating each pixel in shades of colour picture afterwards.Be understandable that, the employing of colorimeter can promote the degree of accuracy of bright chroma information, but the present invention does not get rid of the situation not adopting colorimeter; In addition, the present invention does not get rid of the situation that described multiple LED display module belongs to same batch yet.
Step S2: the public light tone angle value that chrominance information analysis obtains at least one sample described is lighted at least one sample described, and set a bright chroma correction target value according to described public light tone angle value.In the present embodiment, for multiple sample: (1) can in the following way for the analysis of the monochrome information in the bright chroma information of multiple sample: the brightness value for each pixel in the bright chroma information of single sample first carries out normal distribution analysis to remove the too low pixel of brightness value, then is averaging the brightness value of residual pixel point and obtains the average brightness of this sample; Get the public brightness value of the minimum value in the average brightness of each sample as described multiple sample afterwards again, or the minimum value in the average brightness of each sample is suitably adjusted the public brightness value as described multiple sample after certain percentage (such as raising 0 ~ 20%); And often kind of color LED in described multiple sample can a corresponding public brightness value.In addition, (2) analysis for the chrominance information in the bright chroma information of multiple sample can in the following way: for the chrominance information of each pixel in the bright chroma information of single sample, first obtain corresponding colour gamut according to the cie color coordinate of each pixel, reentry each pixel colour gamut common color gamut and obtain the colour gamut of single sample, such as, colour gamut CG1 in Fig. 1, CG2; Obtain the common color gamut of the colour gamut (such as CG1, CG2) of described multiple sample afterwards again, such as, common color gamut CG0 (also with regard to the public domain of CG1 and CG2 two delta-shaped regions) in Fig. 1.So far, the aforementioned public brightness value of obtained described multiple sample and the cie color coordinate corresponding to common color gamut CG0 can form the public light tone angle value of described multiple sample.
Afterwards, for how to set a bright chroma correction target value according to the public light tone angle value of described multiple sample, then the following two kinds situation (a) and (b) can be adopted.(a) using the public light tone angle value of described multiple sample directly as described bright chroma correction target value.B () sets a brightness and sacrifices number percent, also namely sacrifice the certain percentage of public brightness value; Sacrifice the setting of number percent corresponding to this brightness, public chromatic value also can do corresponding change; Such as shown in Fig. 2, the colour gamut that after what-if, the public chromatic value of gained is corresponding is CGa, sacrificing number percent when setting brightness is 8% (also namely public brightness value sacrifices 8%), then colour gamut CGa then mutually deserved meeting change into colour gamut CGb and colour gamut CGb is positioned at the scope of colour gamut CGa, and the cie color coordinate corresponding to colour gamut CGb after changing is revised public chromatic value; Afterwards then can using revised public brightness value and public chromatic value as described bright chroma correction target value.
Step S3: the bright chroma information one of gathering in described multiple LED display module LED display module to be corrected.In the present embodiment, the part in LED display module to be corrected and aforementioned multiple sample belongs to same batch.And the acquisition mode of the bright chroma information of this LED display module to be corrected, can be identical with the acquisition mode of the bright chroma information of aforementioned multiple sample, it is roughly: control LED display module to be corrected and sequentially show multiple different colored picture and colored picture is preferably sprite or pure color picture, and utilize bright chroma collecting device take described multiple different colored picture and carry out graphical analysis to obtain the bright chroma information of LED display module to be corrected, be such as the primary colours bright chroma information of each pixel.
Step S4: calculate the pixel correction coefficient of described LED display module to be corrected according to the described bright chroma information of described LED display module to be corrected and described bright chroma correction target value for the bright chroma correcting described LED display module to be corrected.In the present embodiment, utilize correction software can calculate the correction coefficient of each pixel of LED display module to be corrected according to described bright chroma correction target value and the difference of the light tone angle value of the LED display module to be corrected collected, referred to herein as pixel correction coefficient, the correction coefficient of single pixel is generally a matrix of coefficients.
Afterwards, then the pixel correction coefficient of the LED module to be corrected calculated can be sent and be stored to this LED display module to be corrected.
More specifically, when LED display module to be corrected is the LED box with display control card, then pixel correction coefficient can be stored in the storer on display control card.It should be noted that, when this LED display module to be corrected is applied to LED display synchro system, then this display control card can be the receiving card be connected between sending card and LED lamp panel; When this LED display module to be corrected is applied to LED display asynchronous system, then this display control card can be the receiving card be connected between Asynchronism Card and LED lamp panel, may also be the Asynchronism Card referring to be connected with receiving card function and with LED lamp panel.
In another embodiment, when LED display module to be corrected is the LED lamp panel being provided with storer, then pixel correction coefficient can be stored in the storer in LED lamp panel, and storer is herein such as the nonvolatile memories such as flash memory.It is worth mentioning that, pixel correction coefficient is stored in LED lamp panel, the display control card that the LED box be then spliced into by LED lamp panel uses can not have uniqueness, or from another angle, even if the display control card of LED box is changed also without the need to LED box again storage pixel point calibration coefficient, because it directly can read LED lamp panel.
In another embodiment, the identifier of the pixel correction coefficient of LED display module to be corrected and this LED display module to be corrected can also be associated together and be stored to database, as later maintenance Backup Data.Herein, the identifier of LED display module to be corrected can be by Software Create, or is that label by scanning LED display module to be corrected obtains.Wherein, the label of LED display module to be corrected can be paper labels, also can be electronic tag.
In addition, in other embodiments, suitably can also change the analytical approach of the public light tone angle value of described multiple sample, such as in the process obtaining public brightness value, first can do normal distribution respectively to the brightness value of the same color LED of whole pixels of described multiple sample and analyze the too low pixel of removal brightness value and the average brightness brightness value of residual pixel point being averaging respectively to the often kind of color LED obtaining described multiple sample, again the average brightness of the average brightness of often kind of color LED or often kind of color LED is suitably adjusted the public brightness value as often kind of color LED of described multiple sample after certain percentage, certainly, similarly, in the process obtaining public chromatic value, first can obtain the colour gamut that the cie color coordinate of whole pixels of described multiple sample is corresponding, the common color gamut of these colour gamuts of reentrying can obtain the common color gamut of described multiple sample, and namely cie color coordinate corresponding to this common color gamut can be used as the public chromatic value of described multiple sample, these suitable conversion, all belong to protection scope of the present invention.
In other embodiments, the collection for the bright chroma information of sample also only can gather the bright chroma information of its regional area, and carrys out the bright chroma information of representative sample with the bright chroma information of this regional area; Such as utilize bright chroma meter take the regional area of each colored picture of sample display and obtain corresponding to a brightness value of each colored picture and a chromatic value, thus namely the combination of the brightness value of each colored picture and chromatic value can be used as the bright chroma information of this sample.Similarly, also identical acquisition mode can be adopted for LED display module to be corrected.Certainly, the way only gathering regional area is generally that the bright chroma information being applied in sample/LED display module to be corrected is when can be represented by the bright chroma information of this regional area.
In sum, the embodiment of the present invention obtains public light tone angle value by carrying out sampling collection bright chroma information to LED display module and carrying out statistical study, then according to this public light tone angle value setting bright chroma correction target value for the pixel correction coefficient needed for follow-up generation LED display module to be corrected; Like this then even if the LED display module of different batches can be made also can to have higher bright chroma consistance and homogeneity.
Apply specific case herein to set forth the principle of the bright chroma bearing calibration of LED display module 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 (11)
1. be applied to a bright chroma bearing calibration for the LED display module before assembled LED display screen, it is characterized in that, comprise step:
Gather and be subordinated to the bright chroma information belonging to multiple samples of different batches extracted in multiple LED display module of different batches, wherein, described multiple LED display module is multiple LED lamp panel or multiple LED box;
The public light tone angle value obtaining described multiple sample is analyzed to the described bright chroma information of described multiple sample, and sets a bright chroma correction target value according to described public light tone angle value;
One of to gather in described multiple LED display module the bright chroma information of LED display module to be corrected, wherein, the part in described LED display module to be corrected and described multiple sample belongs to same batch of LED display module; And
The pixel correction coefficient of described LED display module to be corrected is calculated for the bright chroma correcting described LED display module to be corrected according to the described bright chroma information of described LED display module to be corrected and described bright chroma correction target value.
2. the bright chroma bearing calibration of LED display module as claimed in claim 1, it is characterized in that, described LED display module to be corrected is the LED box with display control card, and described bright chroma bearing calibration also comprises step:
The described pixel correction coefficient of described LED display module to be corrected is sent and is stored in the storer on the described display control card of described LED display module to be corrected.
3. the bright chroma bearing calibration of LED display module as claimed in claim 1, it is characterized in that, described LED display module to be corrected is the LED lamp panel being provided with storer, and described bright chroma bearing calibration also comprises step:
The pixel correction coefficient of described LED display module to be corrected is sent and is stored in the described storer of described LED display module to be corrected.
4. the bright chroma bearing calibration of LED display module as claimed in claim 1, is characterized in that, also comprise step:
Send and store described pixel correction coefficient to described LED display module to be corrected.
5. the bright chroma bearing calibration of the LED display module as described in Claims 1-4 any one, is characterized in that, also comprise step:
Obtain the identifier of described LED display module to be corrected; And
The described pixel correction coefficient of described LED display module to be corrected and described identifier are associated together and are stored to database.
6. the bright chroma bearing calibration of LED display module as claimed in claim 5, it is characterized in that, the step obtaining the identifier of described LED display module to be corrected comprises:
Utilize Software Create and obtain described identifier or scan the label of described LED display module to be corrected and obtain described identifier.
7. the bright chroma bearing calibration of LED display module as claimed in claim 1, is characterized in that, collection is subordinated to the step belonging to the bright chroma information of multiple samples of different batches extracted in multiple LED display module of different batches and comprises:
Each sample controlled in described multiple sample sequentially shows multiple different colored picture; And
Take described multiple different colored picture to obtain the described bright chroma information of described multiple sample.
8. the bright chroma bearing calibration of LED display module as claimed in claim 7, is characterized in that, take described multiple different colored picture and comprise with the step of the described bright chroma information obtaining described multiple sample:
Take the regional area of colored picture described in each to obtain the bright chroma information of described regional area, and using the described bright chroma information of the described bright chroma information of described regional area as corresponding sample.
9. the bright chroma bearing calibration of LED display module as claimed in claim 1, is characterized in that, comprise according to the step that described public light tone angle value sets a bright chroma correction target value:
Described public light tone angle value is set as described bright chroma correction target value.
10. the bright chroma bearing calibration of LED display module as claimed in claim 1, is characterized in that, comprise according to the step that described public light tone angle value sets a bright chroma correction target value:
A light tone sacrifice number percent according to described public light tone angle value and setting obtains revised public light tone angle value, and using described revised public light tone angle value as described bright chroma correction target value.
The bright chroma bearing calibration of 11. LED display module as claimed in claim 1, it is characterized in that, the same color LED adopted in same batch of LED display module has identical or close material number.
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| CN104064147B (en) * | 2014-06-25 | 2016-03-23 | 西安诺瓦电子科技有限公司 | The bearing calibration of LED display bright chroma |
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