CN101866621A - LED display screen correction system and method - Google Patents
LED display screen correction system and method Download PDFInfo
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- CN101866621A CN101866621A CN201010190689A CN201010190689A CN101866621A CN 101866621 A CN101866621 A CN 101866621A CN 201010190689 A CN201010190689 A CN 201010190689A CN 201010190689 A CN201010190689 A CN 201010190689A CN 101866621 A CN101866621 A CN 101866621A
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Abstract
The invention discloses an LED display screen correction system comprising a box body parameter obtaining device, a data processing device, a control device and an LED box body which are sequentially connected, and a target parameter input device connected with the data processing device; the box body parameter obtaining device is used for obtaining the average brightness of an LED box body display area and/or the current parameter of color coordinate parameters; the target parameter input device is used for inputting the target parameter of the LED box body on the demand of a user; the data processing device is used for generating the adjustment coefficient of the LED box body according to the current parameter and the target parameter; the control device is used for receiving and storing the adjustment coefficient, adopting the same adjustment coefficient for brightness and/or color correction for each pixel in the display area according to the adjustment coefficient, obtaining the control data of the LED box body, and controlling the LED box body to display; and through correction, the purposes of consistent brightness and consistent color of all box bodies in different batches are achieved.
Description
Technical field
The present invention relates to the display screen alignment technique, in particular a kind of LED display brightness and chromaticity correction system.
Background technology
Human eye feels it is highstrung for interregional brightness and difference in color.In typical case, 4% luminance difference and 2nm colourity difference just can allow the people that the sensation of tangible mosaic is arranged between two LED casings.But to luminance difference between picture element 6%, colourity difference 5nm can accept.
Any human eye visible color can (x y) represents uniquely with a coordinate points in the 1931CIExy chromatic diagram.According to the three primary colors principle, nearly all color that naked eyes can be seen can be mixed out by the different proportion of " three primary colors ".And can draw by the character of CIExy chromatic diagram, any given three light sources, these light sources can not cover the colour gamut of human vision.Promptly go up for how much and say in the CIExy chromatic diagram, do not have three points can form the triangle that comprises whole colour gamut.Owing to use three primary colors to be easier to, and be enough to represent the most of color of occurring in nature, so be used widely than implementing with more " primary colors " expression color.
As shown in Figure 1, use different three primary colors, in the CIExy chromatic diagram, be expressed as the position triangle different with area.Any point color in the zone of triangle encompasses can be represented with these three primary colors.When a kind of triangle of three primary colors composition had comprised another triangle fully, any point color in the then less triangle can be represented that promptly bigger leg-of-mutton colour gamut can reappear all colours of less colour gamut fully by bigger leg-of-mutton three primary colors.
Along with the continuous growth of LED display leasing market, the scale of lease project and lessor's scale are all in continuous expansion.This causes lessor's needs constantly to expand the casing deposit of oneself on the one hand, also exists many families to unite the possibility of chartering single project on the other hand.These all cause the demand of the mixed batch use of casing more and more urgent.Not only there is the luminance difference opposite sex between the casing of different batches, also has the colour difference opposite sex.Present brightness and colourity are adjusted solution, also are difficult to solve in the rental applications casing of different batches and use problem with.
Therefore, there is defective in prior art, needs to improve.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of LED casing that can solve different batches to use the middle brightness that occurs, the corrective system and the method for colourity difference problem with.
Technical scheme of the present invention is as follows:
A kind of LED display corrective system comprises: the box body parameter obtaining device of Lian Jieing, data processing equipment and control device in turn also comprise the target parameter input device that is connected with described data processing equipment; Described box body parameter obtaining device is used to obtain the parameter current of external LED casing viewing area; Described target parameter input device is used for importing according to user's needs the target component of described LED casing; Described data processing equipment is used for generating according to described parameter current and target component the adjustment coefficient of described LED casing; Described control device is used for receiving and storing described adjustment coefficient, adopts described adjustment coefficient to proofread and correct to each pixel in the described viewing area, obtains the control data of described LED casing, controls described LED casing and shows.
Described LED display corrective system, described box body parameter obtaining device are used to obtain the parameter current of whole viewing areas of described LED casing or part viewing area.
Described LED display corrective system, described parameter current are current mean flow rate and/or chromaticity coordinates parameter.
Described LED display corrective system, described parameter current are current mean flow rate and/or chromaticity coordinates parameter, and described box body parameter obtaining device is to being applied to obtain described mean flow rate and/or described chromaticity coordinates parameter as described parameter current; Described control device adopts described adjustment coefficient to carry out brightness and/or chromaticity correction to being applied to.
Described LED display corrective system, described control device comprises storer and multiplier, described storer is used to store described adjustment coefficient, and described multiplier is used for the raw display data of each pixel in the described viewing area be multiply by the control data that described adjustment coefficient obtains described LED casing.
For example, described LED display corrective system, described multiplier is the single-stage multiplier, comprises a multiplication unit.
And for example, described LED display corrective system, described multiplier is multistage multiplier, comprise two above multiplication units, be used for the raw display data of each pixel in the described viewing area is carried out repeatedly iteration correction, obtain the control data of described LED casing, control described LED casing and show.
Described LED display corrective system, described data processing equipment comprises box body parameter acquisition module, target component acquisition module, adjusts coefficients calculation block and download module, described box body parameter acquisition module is connected with described adjustment coefficients calculation block, be used to obtain the parameter current of described casing, and provide described parameter current to described adjustment coefficients calculation block; Described target component acquisition module is connected with described adjustment coefficients calculation block, is used to obtain described target component, and provides described target component to described adjustment coefficients calculation block; Described adjustment coefficients calculation block is used to use described parameter current and described target component, according to pre-seting the described adjustment coefficient of algorithm computation; Described download module is used for described adjustment coefficient is downloaded to described control device.
For example, described LED display corrective system, described data processing equipment also comprises judge module and feedback module, described judge module is connected with described box body parameter acquisition module with described target component acquisition module, be used for according to described current brightness and/or chromaticity coordinates parameter, judge whether described object brightness and/or chromaticity coordinates parameter can realize, be then to calculate the brightness and/or the colourity loss ratio of proofreading and correct the described LED casing in back by described judge module, feed back to the user by described feedback module, instruct described adjustment coefficients calculation block to calculate described adjustment coefficient simultaneously, otherwise re-enter object brightness and/or chromaticity coordinates parameter by described feedback module prompting user.
Described LED display corrective system, it also comprises described LED casing, wherein, described box body parameter obtaining device is used to obtain the parameter current of described LED casing viewing area.
Described LED display corrective system, described parameter current comprise the current color coordinate of current brightness and three primary colours and/or white, and described target component comprises object brightness and three primary colours and/or white object chromaticity coordinates.
For example, described LED display corrective system, described adjustment coefficients calculation block comprise target component processing unit, parameter current processing unit and adjust coefficient calculation unit;
Described target component processing unit is used for obtaining target tristimulus values matrix E ' according to described three primary colours and/or white object chromaticity coordinates, and calculates its inverse matrix E '
-1, also be used for according to described three primary colours and/or white object brightness calculation target three primary colours component luminance matrix P ', and calculate its matrix P of matrix '
-1, with described inverse matrix E '
-1And matrix P of matrix '
-1Pass to described adjustment coefficient calculation unit;
Described parameter current processing unit, be used for obtaining current tristimulus values matrix E according to the current color coordinate of described three primary colours and/or white, also be used for the current three primary colours component of current brightness calculation luminance matrix P, described matrix E and matrix P are passed to described adjustment coefficient calculation unit according to described three primary colours and/or white;
Described adjustment coefficient calculation unit be used for according to formula T=(E '
-1P '
-1) * (EP) calculating adjustment coefficient T.
A kind of LED display bearing calibration may further comprise the steps: A1: the box body parameter obtaining step, obtain the parameter current of target LED casing; A2: the target component input step, import the target component of described LED casing according to user's needs; A3: data processing step generates the adjustment coefficient of described LED casing according to described parameter current and target component; A4: storing step, receive and store described adjustment coefficient, adopt described adjustment coefficient to proofread and correct to each pixel in the described viewing area, obtain the control data of described LED casing, control described LED casing and show.
Described LED display bearing calibration, described steps A 3 concrete following steps: the A31 that carry out: obtain the parameter current of described casing, and provide described parameter current to described adjustment coefficients calculation block; A32: obtain the target component of user's input, and provide described target component to described adjustment coefficients calculation block; A33: use described parameter current and described target component, according to pre-seting the described adjustment coefficient of algorithm computation; A34: described adjustment coefficient is downloaded to described memory storage;
For example, described LED display bearing calibration, further comprising the steps of after steps A 32: A321: according to described parameter current, judge whether described target component can realize, be then to calculate luminance loss's ratio of proofreading and correct the described LED casing in back, give the user with described luminance loss's proportional feedback, execution in step A33, otherwise continue execution in step A32.
Described LED display bearing calibration, described parameter current comprises the current color coordinate of three primary colours and/or white and the current brightness of three primary colours and/or white, and described target component comprises three primary colours and/or white object chromaticity coordinates and three primary colours and/or white object brightness.
For example, described LED display bearing calibration, described steps A 33 concrete following operation: the A331 that carry out: obtain target tristimulus values matrix E ' according to described three primary colours and/or white object chromaticity coordinates, and calculate its inverse matrix E '
-1, according to described three primary colours and/or white object brightness calculation target three primary colours component luminance matrix P ', and calculate its matrix P of matrix '
-1A332: the current color coordinate according to described three primary colours and/or white obtains current tristimulus values matrix E, according to the current three primary colours component of the current brightness calculation luminance matrix P of described three primary colours and/or white; A333: according to formula T=(E '
-1P '
-1) * (EP) calculating adjustment coefficient T.
Adopt such scheme, zone leveling monochrome information or chrominance information or average luminance information and the chrominance information of the present invention by obtaining LED display, the display screen subsection territory is proofreaied and correct, make the zone in and the zone between brightness reach consistent with colourity, the raising display effect.
Description of drawings
Fig. 1 is the 1931CIExy chromatic diagram;
Fig. 2 is the structural representation of the embodiment of the invention 1;
Fig. 3 is the structural representation of the embodiment of the invention 2;
Fig. 4 is the structural representation of the embodiment of the invention 3;
Fig. 5 is the structural representation of the embodiment of the invention 4.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1
As shown in Figure 2, present embodiment provides a kind of LED display corrective system, comprise: the box body parameter obtaining device 10 of Lian Jieing, data processing equipment 11 and control device 12 in turn also comprise the target parameter input device 14 that is connected with described data processing equipment 11.
Described box body parameter obtaining device 10, be used to obtain the parameter current of outside LED casing 13, for example can adopt light gun, colour measurement instrument etc. directly to obtain described parameter current, so-called parameter current refers to LED casing 13 and proofreaies and correct parameter and index before, for example three primary colours colourity, chromaticity coordinates, brightness, colour temperature, white brightness or the like is part or all of, can certainly adopt camera to obtain the three primary colours photo of LED casing 13, adopt computer software analysis to obtain above-mentioned parameters and index.
Described target parameter input device 14, be used for importing the target component of described LED casing 13 according to the different user needs, so-called target component refers to LED casing 13 and expect the index and the parameter that reach after overcorrect, for example three primary colours chromaticity coordinates, colour temperature, white brightness or the like, for example, the user who has has leased a collection of LED casing, need be assembled into the screen body in indoor use, can adopt lower object brightness this moment, if outdoor application can be used higher object brightness etc.
Described data processing equipment 11 is used for generating according to described parameter current and target component the adjustment coefficient of described LED casing.
Described control device 12, be used for receiving and storing described adjustment coefficient, according to adjusting the control data that coefficient processing obtains LED casing 13, control LED casing 13 shows, the serial sub-controller that the little digital device of celebrating development corporation, Ltd. makes in for example adopting is as control device 12, above-mentioned sub-controller generates pwm signal according to the control signal that master controller transmits, this pwm signal be multiply by the above-mentioned adjustment coefficient that is stored in the sub-controller, obtain adjusted LED video data, proofread and correct between each later LED casing luminance difference and colourity difference through said system like this and all obtain lowlyer, just mosaic phenomenon can not occur when being used in combination.
When having a plurality of LED casing, can use described LED display corrective system in turn, also can adopt described LED display corrective system batch to carry out the correction of a plurality of LED casings.
An example is, also as shown in Figure 2, and above-mentioned LED display corrective system, also comprise described LED casing 13, in this example promptly, this LED casing 13 belongs to the LED display corrective system, at this moment, described box body parameter obtaining device 10 is used to obtain the parameter current of described LED casing 13; Perhaps, above-mentioned LED display corrective system comprises some LED casings 13.Various embodiments of the present invention all do not impose any restrictions this.
Embodiment 2
As shown in Figure 3, on the basis of embodiment 1, above-mentioned data processing equipment 11 can adopt following structure to realize, it comprises box body parameter acquisition module 111, target component acquisition module 112, adjusts coefficients calculation block 113 and download module 114, described box body parameter acquisition module 111 is connected with described adjustment coefficients calculation block 112, be used to obtain the parameter current of described casing, and provide described parameter current to described adjustment coefficients calculation block 113; Described target component acquisition module 112 is connected with described adjustment coefficients calculation block 113, is used to obtain the target component of user's input, and provides described target component to described adjustment coefficients calculation block; Described adjustment coefficients calculation block 113 is used to use described parameter current and described target component, according to pre-seting the described adjustment coefficient of algorithm computation; Described download module 114 is used for described adjustment coefficient is downloaded to described control device.
Embodiment 3
On the basis of embodiment 2, as shown in Figure 4, data processing equipment 11 further can also comprise judge module 115 and feedback module 116, described judge module 115 is connected with described box body parameter acquisition module 111 with described target component acquisition module 112, described judge module 115 is used for judging that according to target component and parameter current can described target component realize, if judged result is for affirming, then further calculate luminance loss's ratio of proofreading and correct back LED casing by described judge module, feed back to the user by described feedback module 116, instruct described adjustment coefficients calculation block 113 to calculate described adjustment coefficient simultaneously, if judged result is for negating, then re-enter target component by described feedback module 116 prompting users, for example, little triangle colour gamut as shown in Figure 1 and big triangle colour gamut, if target color gamut is big triangle, current colour gamut is little triangle, then after overcorrect, can not realize this target color gamut, if target color gamut is little triangle, current colour gamut is big triangle, then after overcorrect, can realize this target color gamut, but lost certain brightness this moment, if the area discrepancy minimum of two delta-shaped regions, can think its luminance loss's minimum after overcorrect, this target color gamut promptly is feasible; Again for example, calculating luminance loss's ratio is 20%, can accept if the user thinks, then adopts the current target parameter to proofread and correct, and can not accept if the user thinks, then can stop using parameter current to proofread and correct, and perhaps abandons proofreading and correct.
Another example, above-mentioned parameter current comprises the current color coordinate of three primary colours and the current brightness of three primary colours, for example casing is under the situation of red, green, blue three primary colours, record its chromaticity coordinates and brightness data respectively as parameter current, target component comprises three primary colours target color coordinates and three primary colours object brightness, can certainly use other parameters, can draw the parameter of three primary colours current color coordinate and current brightness such as process calculating, or other are through calculating the parameter of three primary colours target color coordinates and current brightness.
Embodiment 4
As shown in Figure 5, on the basis of the various embodiments described above, adjust coefficients calculation block and further comprise target component processing unit 1131, parameter current processing unit 1132 and adjust coefficient calculation unit 1133;
Described target component processing unit 1131 is used for obtaining target tristimulus values matrix E ' according to described three primary colours target color coordinates, for example
And Cz=1-Cx-Cy is arranged, and wherein (Cx, Cy) the three primary colours target color coordinates parameter of importing for the user, and calculate its inverse matrix E '
-1, also be used for calculating target three primary colours component luminance matrix P ', for example according to described three primary colours object brightness
Wherein Lr, Lg, Lb are respectively the object brightness of red, green, blue three primary colours, the brightness data said PWM data of LED casing when k is this brightness, for example the brightness and depth of LED casing is 16bit, k=65536 then, the implication of visible P ' is exactly the brightness of the three primary colours component on the actual physics meaning of the unit brightness value representative on the logical meaning; Calculate then its matrix P of matrix '
-1, with described inverse matrix E '
-1And matrix P of matrix '
-1Passing to described adjustment coefficient calculation unit uses;
Described parameter current processing unit 1132 is used for obtaining current tristimulus values matrix E according to the current color coordinate of described three primary colours, for example
And Cz=1-Cx-Cy is arranged, wherein (Cx, Cy) three primary colours current color coordinate parameters for measuring; Described parameter current processing unit 1132 also is used for the current three primary colours component of the current brightness calculation luminance matrix P according to described three primary colours, for example
Wherein Lr, Lg, Lb are the current brightness of red, green, blue three primary colours, k is the said PWM data for the brightness data of LED casing under this brightness, for example the brightness and depth of LED casing is 16bit, k=65536 then, as seen the implication of P is exactly the brightness of the three primary colours component on the actual physics meaning of the unit brightness value representative on the logical meaning, and described matrix E and matrix P are passed to described adjustment coefficient calculation unit;
Described adjustment coefficient calculation unit 1133 be used for according to formula T=(E '
-1P '
-1) * (EP) calculating adjustment coefficient T.
Embodiment 5
Be applied to the various embodiments described above, present embodiment continues to provide the bearing calibration of a kind of LED display chroma luminance, and it may further comprise the steps:
A1: box body parameter obtaining step, be used to obtain the parameter current of described LED casing, for example can adopt light gun, colour measurement instrument etc. directly to obtain parameter current, so-called parameter current can comprise parameter and the index before 13 corrections of LED casing, for example three primary colours colourity, chromaticity coordinates, brightness, colour temperature, white brightness or the like, can certainly adopt camera to obtain the three primary colours photo of LED casing 13, adopt computer software analysis to obtain above-mentioned parameters and index.
A2: the target component input step is used for importing according to user's needs the target component of described LED casing; So-called target component refers to LED casing 13 and expect the index and the parameter that reach after overcorrect, for example three primary colours chromaticity coordinates, colour temperature, white brightness or the like, the user who for example has has leased a collection of LED casing, need be assembled into the screen body in indoor use, can adopt lower object brightness this moment, if outdoor application can be used higher object brightness etc.For example, USB interface is set or with keyboard interface etc., the user can pass through equipment such as mobile phone, keyboard, input unit, presses predetermined format, imports the target component of described LED casing.
A3: data processing step is used for generating according to described parameter current and target component the adjustment coefficient of described LED casing.
For example, the described steps A 3 concrete following steps of carrying out:
A31: obtain the parameter current of described casing, and provide described parameter current to described adjustment coefficients calculation block; For example can adopt light gun, colour measurement instrument etc. directly to obtain described parameter current, so-called parameter current refers to LED casing 13 and proofreaies and correct parameter and index before, for example three primary colours colourity, chromaticity coordinates, brightness, colour temperature, white brightness or the like is part or all of, can certainly adopt camera to obtain the three primary colours photo of LED casing 13, adopt computer software analysis to obtain above-mentioned parameters and index.
A32: obtain the target component of user's input, and provide described target component to described adjustment coefficients calculation block; So-called target component refers to LED casing 13 and expect the index and the parameter that reach after overcorrect, for example three primary colours chromaticity coordinates, colour temperature, white brightness or the like, for example, the user who has has leased a collection of LED casing, need be assembled into the screen body in indoor use, can adopt lower object brightness this moment, if outdoor application can be used higher object brightness etc.
A33: use described parameter current and described target component, according to pre-seting the described adjustment coefficient of algorithm computation;
A34: described adjustment coefficient is downloaded to described memory storage.
And for example, be applied to example, after steps A 32, can also carry out following steps: A321:, judge that can described target component realize according to described parameter current, if judged result is for affirming, then calculate luminance loss's ratio of proofreading and correct the described LED casing in back, give the user described luminance loss's proportional feedback, and execution in step A33, if judged result is for negating, then repeated execution of steps A32 for example, requires the user to re-enter target component.
A4: storing step is used for receiving and storing described adjustment coefficient.
The serial sub-controller that the little digital device of celebrating development corporation, Ltd. makes in for example adopting is as control device 12, above-mentioned sub-controller generates pwm signal according to the control signal that master controller transmits, this pwm signal be multiply by the above-mentioned adjustment coefficient that is stored in the sub-controller, obtain adjusted LED video data, proofread and correct between each later LED casing luminance difference and colourity difference through said system like this and all obtain lowlyer, just mosaic phenomenon can not occur when being used in combination.
And for example, can adopt above-mentioned bearing calibration repeatedly display screen to be proofreaied and correct, if promptly can carry out second-order correction on the basis in the first time, till satisfaction through the effect of once proofreading and correct is undesirable.Obtain new adjustment coefficient after promptly original adjustment coefficient can being multiply by same adjustment coefficient, the raw display data that re-uses each pixel in described whole viewing area or the part viewing area multiply by new adjustment coefficient.
Embodiment 6
Be applied to above-mentioned each example, another example, described parameter current comprises the current color coordinate of three primary colours and the current brightness of three primary colours, described target component comprises that described target component comprises three primary colours target color coordinates and three primary colours object brightness, can certainly use other parameters, for example process calculates the parameter of three primary colours current color coordinate and current brightness, or other can be through calculating the parameter of three primary colours target color coordinates and current brightness.
On the basis of the foregoing description, described steps A 33 can specifically be carried out following operation:
A331: obtain target tristimulus values matrix E ' according to described three primary colours target color coordinates, and calculate its inverse matrix E '
-1, calculate target three primary colours component luminance matrix P ' according to described three primary colours object brightness, and calculate its matrix P of matrix '
-1A332: the current color coordinate according to described three primary colours obtains current tristimulus values matrix E, according to the current three primary colours component of the current brightness calculation luminance matrix P of described three primary colours; A333: according to formula T=(E '
-1P '
-1) * (EP) calculating adjustment coefficient T.
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (10)
1. a LED display corrective system is characterized in that, comprising: the box body parameter obtaining device of Lian Jieing, data processing equipment and control device in turn also comprise the target parameter input device that is connected with described data processing equipment;
Described box body parameter obtaining device is used to obtain the parameter current of external LED casing viewing area;
Described target parameter input device is used for importing according to user's needs the target component of described LED casing;
Described data processing equipment is used for generating according to described parameter current and target component the adjustment coefficient of described LED casing;
Described control device is used for receiving and storing described adjustment coefficient, adopts described adjustment coefficient to proofread and correct to each pixel in the described viewing area, obtains the control data of described LED casing, controls described LED casing and shows.
2. LED display corrective system according to claim 1 is characterized in that, described box body parameter obtaining device is used to obtain the parameter current of whole viewing areas of described LED casing or part viewing area.
3. LED display corrective system according to claim 1 is characterized in that, described parameter current is current mean flow rate and/or chromaticity coordinates parameter;
Described box body parameter obtaining device is to being applied to obtain described mean flow rate and/or described chromaticity coordinates parameter as described parameter current;
Described control device adopts described adjustment coefficient to carry out brightness and/or chromaticity correction to being applied to.
4. LED display corrective system according to claim 1, it is characterized in that, described control device comprises storer and multiplier, described storer is used to store described adjustment coefficient, and described multiplier is used for the raw display data of each pixel in the described viewing area be multiply by the control data that described adjustment coefficient obtains described LED casing; For example, described multiplier is the single-stage multiplier, comprises a multiplication unit; And for example, described multiplier is multistage multiplier, comprises two above multiplication units, is used for the raw display data of each pixel in the described viewing area is carried out repeatedly iteration correction, obtains the control data of described LED casing, controls described LED casing and shows.
5. LED display corrective system according to claim 1, it is characterized in that, described data processing equipment comprises box body parameter acquisition module, target component acquisition module, adjusts coefficients calculation block and download module, described box body parameter acquisition module is connected with described adjustment coefficients calculation block, be used to obtain the parameter current of described casing, and provide described parameter current to described adjustment coefficients calculation block; Described target component acquisition module is connected with described adjustment coefficients calculation block, is used to obtain described target component, and provides described target component to described adjustment coefficients calculation block; Described adjustment coefficients calculation block is used to use described parameter current and described target component, according to pre-seting the described adjustment coefficient of algorithm computation; Described download module is used for described adjustment coefficient is downloaded to described control device; For example, described data processing equipment also comprises judge module and feedback module, described judge module is connected with described box body parameter acquisition module with described target component acquisition module, be used for according to described current brightness and/or chromaticity coordinates parameter, judge whether described object brightness and/or chromaticity coordinates parameter can realize, be then to calculate the brightness and/or the colourity loss ratio of proofreading and correct the described LED casing in back by described judge module, feed back to the user by described feedback module, instruct described adjustment coefficients calculation block to calculate described adjustment coefficient simultaneously, otherwise re-enter object brightness and/or chromaticity coordinates parameter by described feedback module prompting user.
6. LED display corrective system according to claim 1 is characterized in that, it also comprises described LED casing, and wherein, described box body parameter obtaining device is used to obtain the parameter current of described LED casing viewing area.
7. according to the arbitrary described LED display corrective system of claim 1 to 6, it is characterized in that, described parameter current comprises the current color coordinate of current brightness and three primary colours and/or white, and described target component comprises object brightness and three primary colours and/or white object chromaticity coordinates; For example, described adjustment coefficients calculation block comprises target component processing unit, parameter current processing unit and adjusts coefficient calculation unit;
Described target component processing unit is used for according to described three primary colours and/or white object chromaticity coordinates
Obtain target tristimulus values matrix E ', and calculate its inverse matrix E '
-1, also be used for according to described three primary colours and/or white object brightness calculation target three primary colours component luminance matrix P ', and calculate its matrix P of matrix '
-1, with described inverse matrix E '
-1And matrix P of matrix '
-1Pass to described adjustment coefficient calculation unit;
Described parameter current processing unit, be used for obtaining current tristimulus values matrix E according to the current color coordinate of described three primary colours and/or white, also be used for the current three primary colours component of current brightness calculation luminance matrix P, described matrix E and matrix P are passed to described adjustment coefficient calculation unit according to described three primary colours and/or white;
Described adjustment coefficient calculation unit be used for according to formula T=(E '
-1P '
-1) * (EP) calculating adjustment coefficient T.
8. a LED display bearing calibration is characterized in that, may further comprise the steps:
A1: the box body parameter obtaining step, obtain the parameter current of target LED casing;
A2: the target component input step, import the target component of described LED casing according to user's needs;
A3: data processing step generates the adjustment coefficient of described LED casing according to described parameter current and target component;
A4: storing step, receive and store described adjustment coefficient, adopt described adjustment coefficient to proofread and correct to each pixel in the described viewing area, obtain the control data of described LED casing, control described LED casing and show.
9. LED display bearing calibration according to claim 8 is characterized in that, the described steps A 3 concrete following steps of carrying out:
A31: obtain the parameter current of described casing, and provide described parameter current to described adjustment coefficients calculation block;
A32: obtain the target component of user's input, and provide described target component to described adjustment coefficients calculation block;
A33: use described parameter current and described target component, according to pre-seting the described adjustment coefficient of algorithm computation;
A34: described adjustment coefficient is downloaded to described memory storage;
For example, further comprising the steps of after steps A 32:
A321: according to described parameter current, judging whether described target component can realize, is then to calculate luminance loss's ratio of proofreading and correct the described LED casing in back, gives the user with described luminance loss's proportional feedback, execution in step A33, otherwise continue execution in step A32.
10. according to Claim 8 to 9 arbitrary described LED display bearing calibrations, it is characterized in that, described parameter current comprises the current color coordinate of three primary colours and/or white and the current brightness of three primary colours and/or white, and described target component comprises three primary colours and/or white object chromaticity coordinates and three primary colours and/or white object brightness; For example, operation below described steps A 33 concrete the execution:
A331: obtain target tristimulus values matrix E ' according to described three primary colours and/or white object chromaticity coordinates, and calculate its inverse matrix E '
-1, according to described three primary colours and/or white object brightness calculation target three primary colours component luminance matrix P ', and calculate its matrix P of matrix '
-1
A332: the current color coordinate according to described three primary colours and/or white obtains current tristimulus values matrix E, according to the current three primary colours component of the current brightness calculation luminance matrix P of described three primary colours and/or white;
A333: according to formula T=(E '
-1P '
-1) * (EP) calculating adjustment coefficient T.
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Cited By (32)
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| CN102128423A (en) * | 2010-11-30 | 2011-07-20 | 巴可伟视(北京)电子有限公司 | LED module-based random matrix lamp mixing method and system device thereof |
| CN102122483A (en) * | 2010-12-22 | 2011-07-13 | 利亚德光电股份有限公司 | Method and system for monitoring LED (light-emitting diode) display screen as well as LED display |
| CN102595152A (en) * | 2011-01-13 | 2012-07-18 | 承景科技股份有限公司 | Two-dimension (2D) to three-dimension (3D) color compensation system and method thereof |
| CN102542988A (en) * | 2011-12-29 | 2012-07-04 | 中国科学院长春光学精密机械与物理研究所 | Device and method for previewing light-emitting diode (LED) display screen revising effect |
| CN102542988B (en) * | 2011-12-29 | 2013-11-27 | 中国科学院长春光学精密机械与物理研究所 | Device and method for previewing light-emitting diode (LED) display screen revising effect |
| CN102768816A (en) * | 2012-07-30 | 2012-11-07 | 西安诺瓦电子科技有限公司 | Automatic LED (light-emitting diode) display screen correction method |
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| CN103927980A (en) * | 2014-03-10 | 2014-07-16 | 深圳市奥拓电子股份有限公司 | Point-by-point correcting method and device for LED display screen |
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| CN104599636A (en) * | 2015-02-10 | 2015-05-06 | 西安诺瓦电子科技有限公司 | Brightness and chrominance correction coefficient generation device and brightness and chrominance correction method for LED (light emitting diode) display screen |
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| CN107945730A (en) * | 2017-11-22 | 2018-04-20 | 田国辉 | A kind of control method of the LED standard screen based on two-level current |
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