CN102402944A - Point-by-point correcting system and point-by-point correcting method for LED display screen - Google Patents
Point-by-point correcting system and point-by-point correcting method for LED display screen Download PDFInfo
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- CN102402944A CN102402944A CN2011104292537A CN201110429253A CN102402944A CN 102402944 A CN102402944 A CN 102402944A CN 2011104292537 A CN2011104292537 A CN 2011104292537A CN 201110429253 A CN201110429253 A CN 201110429253A CN 102402944 A CN102402944 A CN 102402944A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0242—Compensation of deficiencies in the appearance of colours
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0693—Calibration of display systems
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Abstract
The invention discloses a point-by-point correcting system and a point-by-point correcting method for LED display screen. The system comprises an LED display screen, a data acquisition unit, a correcting unit, a revision unit and a video controller; the data acquisition unit is connected with the correcting unit; the correcting unit is connected with the LED display screen through the video controller; and the revision unit is connected with the correcting unit. The method comprises the following steps of: calculating correction coefficient after calculation preparation of correction coefficient, and revising the calculated correction coefficient, then correcting point by point through the revised correction coefficient. The point-by-point correcting system using the point-by-point correcting method, as the system is provided with a revising unit for revising the correction coefficient and correcting point by point through the revised correction coefficient, can not only improve chromaticity uniformity of the LED display screen but also remove the phenomenon of snow point and pock mark.
Description
Technical field
The present invention relates to LED display technique field, be specifically related to a kind of LED display pointwise correction method that a kind of LED display point-to-point correction system and this system adopt.
Background technology
LED display uniformity of chromaticity problem is puzzlement insider's a a great problem all the time; The brightness irregularities that it has been generally acknowledged that LED can be carried out single point correction; Improve brightness uniformity; Can't proofread and correct and colourity is inhomogeneous, can only be through the LED chromaticity coordinates be segmented and screens and improve.But Along with people's requires increasingly highly to LED display, only the LED chromaticity coordinates is segmented and screens and can't satisfy the fastidious sight of people.
In the up-to-date technology, can proofread and correct the method that display screen adopts the three primary colours complementation to repay, this method can make the uniformity of chromaticity of LED display improve.But because human eye is red and green very responsive to what compensate in the blueness, too little like arnotto or green penalty coefficient, feel to have occurred a dim spot to human eye; Too big like arnotto or green penalty coefficient, giving the sensation of human eye then is a bright spot to have occurred.When especially blue lamp wavelength and brightness gear disperse; Must have a lot of blue leds only need compensate less red green coefficient and just can arrive desired value; Having a lot of blue leds simultaneously needs the big red green coefficient of compensate for slower could arrive desired value; Proofread and correct the back blueness like this and a lot of snows or pit will occur, therefore need to improve.
Summary of the invention
One of technical matters to be solved by this invention provides the point-to-point correction system that a kind of LED shows, it not only can improve the uniformity of chromaticity of LED display, and can eliminate the phenomenon of snow and pit.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of LED display point-to-point correction system comprises: LED display, data acquisition unit, correcting unit, amending unit and Video Controller; Said data acquisition unit is connected with correcting unit, and correcting unit is connected with LED display through Video Controller, and said amending unit is connected with correcting unit.
In the optimized technical scheme, said LED display point-to-point correction system also comprises Database Unit, and said Database Unit is connected with correcting unit with amending unit.
In the optimized technical scheme, said data acquisition unit comprises digital camera and light gun; Said digital camera all is connected with correcting unit with light gun.
Two of technical matters to be solved by this invention is corresponding pointwise correction methods that provide a kind of LED to show, it not only can improve the uniformity of chromaticity of LED display, and can eliminate the phenomenon of snow and pit.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of LED display pointwise correction method based on aforesaid a kind of LED display point-to-point correction system, is shielded the pointwise correction that carries out brightness and colourity to LED, and said pointwise correction method comprises the steps: in proper order
S1), correction factor calculation is prepared: be ready to each required association of calculation correction coefficient;
S2), calculation correction coefficient: the correction coefficient C that calculates red, green, blue three looks
Rr, C
Rg, C
Rb, C
Gr, C
Gg, C
Gb, C
Br, C
Bg, C
Bb
S3), correcting process: to C
BrAnd C
BgThe processing of revising makes r1*C
Brv/ C
Bbv≤C
Br≤r2*C
Brv/ C
Bbv, g1*C
Bgv/ C
Bbv≤C
Bg≤g2*C
Bgv/ C
Bbv, wherein r1, r2, g1, g2 are experience factor, C
Bbv, C
Brv, C
BgvBe respectively C
Bb, C
Br, C
BgMean value before processing;
S4), pointwise correction: adopt revised correction coefficient, LED display is carried out pointwise correction.
In the optimized technical scheme; Step S1) particularly is meant: after lighting LED display; The correcting unit of control computer sends image data acquiring and instructs to data acquisition unit; Data acquisition unit is gathered each pixel brightness and chromaticity coordinates on the LED display, and sets the brightness of red, green, blue three looks and the desired value of chromaticity coordinates through the correcting unit of control computer.
In the optimized technical scheme, said data acquisition unit comprises digital camera and light gun, and said digital camera all is connected with correcting unit with light gun; Said brightness and chromaticity coordinates comprise absolute value and relative value; The relative value of each pixel brightness and chromaticity coordinates on the said digital camera collection LED display; Said light gun is gathered a perhaps absolute value of several pixel brightness.
In the optimized technical scheme; Said correcting unit is demarcated the relative value of each pixel brightness and chromaticity coordinates according to the absolute value of said brightness; Thereby calculate the absolute value of each pixel brightness and chromaticity coordinates; Combine the brightness of red, green, blue three looks and the desired value of chromaticity coordinates again, calculate the correction coefficient of red, green, blue three looks: C
Rr, C
Rg, C
Rb, C
Gr, C
Gg, C
Gb, C
Br, C
Bg, C
BbAnd export amending unit to.
Further in the optimized technical scheme, said LED display point-to-point correction system also comprises Database Unit, and said Database Unit is connected with correcting unit with amending unit; Step S2) coefficient of calculation correction described in is meant: correcting unit is with the relative value of absolute value, brightness and the chromaticity coordinates of said brightness; And the brightness of red, green, blue three looks and the desired value of chromaticity coordinates send into Database Unit, calculated the correction coefficient of red, green, blue three looks: C by Database Unit
Rr, C
Rg, C
Rb, C
Gr, C
Gg, C
Gb, C
Br, C
Bg, C
BbAfter export amending unit to.
Further in the optimized technical scheme, step S 3) correcting process particularly is meant:
Calculate r1*C earlier
Brv/ C
Bbv, r2*C
Brv/ C
Bbv, g1*C
Bgv/ C
Bbv, g2*C
Bgv/ C
BbvJudge then and revise C
BrAnd C
Bg
Said judgement is also revised C
BrAnd C
BgParticularly be meant:
If C
BrLess than r1*C
Brv/ C
Bbv, C then
Br=r1*C
Brv/ C
BbvIf C
BrGreater than r2*C
Brv/ C
Bbv, C then
Br=r2*C
Brv/ C
Bbv
If C
BgLess than g1*C
Bgv/ C
Bbv, C then
Bg=g1*C
Bgv/ C
BbvIf C
BgGreater than g2*C
Bgv/ C
Bbv, C then
Bg=g2*C
Bgv/ C
Bbv
Again further in the optimized technical scheme, step S3) value of r1 is between 0.2 and 0.45 described in, and the value of r2 is between 0.45 and 0.7, and the value of g1 is between 0.2 and 0.45, and the value of g2 is between 0.45 and 0.7.
The invention has the beneficial effects as follows:
Owing to be provided with amending unit, and be used for correction coefficient is revised, removing pointwise correction with revised correction coefficient, thereby not only can improve the uniformity of chromaticity of LED display, and can eliminate the phenomenon of snow and pit.
Below in conjunction with accompanying drawing the present invention is made further detailed description.
Description of drawings
Fig. 1 is the block diagram of system of a kind of LED display point-to-point correction system of the specific embodiment of the invention;
Fig. 2 is the process flow diagram of a kind of LED display pointwise correction of specific embodiment of the invention method;
Fig. 3 is the display effect figure before a kind of LED display point-to-point correction system of the specific embodiment of the invention carries out pointwise correction;
Fig. 4 is the display effect figure after a kind of LED display point-to-point correction system of the specific embodiment of the invention carries out pointwise correction.
Embodiment
A kind of LED display point-to-point correction system that this embodiment provides is as shown in Figure 1, comprising:: LED display, data acquisition unit, correcting unit, amending unit and Video Controller; Said data acquisition unit is connected with correcting unit, and correcting unit is connected with LED display through Video Controller, and said amending unit is connected with correcting unit.In the actual use, correcting unit and amending unit can be correction software and the fixed softwares that moves on the host computer, and in fact fixed software can also be the correcting module in the correction software.Owing to be provided with amending unit, can revise correction coefficient, thereby when improving the LED display uniformity of chromaticity, can also eliminate the phenomenon of snow and pit.
In the optimized technical scheme, said LED display point-to-point correction system also comprises Database Unit, and said Database Unit is connected with correcting unit with amending unit.Database Unit can be an independent database on the host computer, also can be the database that correction software carries.Owing to be provided with special database, give Database Unit with the calculation correction coefficient and accomplish, specialty is with quick more.
In the optimized technical scheme, said data acquisition unit comprises digital camera and light gun; Said digital camera all is connected with correcting unit with light gun.Digital camera is convenient to gather the brightness of all pixels on the entire display screen and the relative value of chromaticity coordinates, and light gun can be gathered a perhaps absolute value of several pixel intensity, thereby is that the absolute value that calculates each pixel brightness and chromaticity coordinates provides possibility.
The pointwise correction method that a kind of LED that this embodiment provides shows; It is based on aforesaid a kind of LED display point-to-point correction system; LED is shielded the pointwise correction that carries out brightness and colourity, and said pointwise correction method is as shown in Figure 2, and order comprises the steps:
S1), correction factor calculation is prepared: be ready to each required association of calculation correction coefficient.
Particularly be meant: after lighting LED display; The correcting unit of control computer sends image data acquiring and instructs to data acquisition unit; Data acquisition unit is gathered each pixel brightness and chromaticity coordinates on the LED display, and sets the brightness of red, green, blue three looks and the desired value of chromaticity coordinates through the correcting unit of control computer.
Said data acquisition unit comprises digital camera and light gun, and said digital camera all is connected with correcting unit with light gun; Said brightness and chromaticity coordinates comprise absolute value and relative value; The relative value of each pixel brightness and chromaticity coordinates on the said digital camera collection LED display; Said light gun is gathered a perhaps absolute value of several pixel brightness.
Certainly, need eliminate the influence of veiling glare during data acquisition, carry out so gather to be preferably in the darkroom.
S2), calculation correction coefficient: the correction coefficient C that calculates red, green, blue three looks
Rr, C
Rg, C
Rb, C
Gr, C
Gg, C
Gb, C
Br, C
Bg, C
Bb
Particularly be meant; Said correcting unit is demarcated the relative value of each pixel brightness and chromaticity coordinates according to the absolute value of said brightness; Thereby calculate the absolute value of each pixel brightness and chromaticity coordinates; Combine the brightness of red, green, blue three looks and the desired value of chromaticity coordinates again, calculate the correction coefficient of red, green, blue three looks: C
Rr, C
Rg, C
Rb, C
Gr, C
Gg, C
Gb, C
Br, C
Bg, C
BbAnd export amending unit to.
Further in the optimized technical scheme, said LED display point-to-point correction system also comprises Database Unit, and said Database Unit is connected with correcting unit with amending unit; Step S2) coefficient of calculation correction described in is meant: correcting unit is with the relative value of absolute value, brightness and the chromaticity coordinates of said brightness; And the brightness of red, green, blue three looks and the desired value of chromaticity coordinates send into Database Unit, calculated the correction coefficient of red, green, blue three looks: C by Database Unit
Rr, C
Rg, C
Rb, C
Gr, C
Gg, C
Gb, C
Br, C
Bg, C
BbAfter export amending unit to.
S3), correcting process: to C
BrAnd C
BgThe processing of revising makes r1*C
Brv/ C
Bbv≤C
Br≤r2*C
Brv/ C
Bbv, g1*C
Bgv/ C
Bbv≤C
Bg≤g2*C
Bgv/ C
Bbv, wherein r1, r2, g1, g2 are experience factor, C
Bbv, C
Brv, C
BgvBe respectively C
Bb, C
Br, C
BgMean value before processing.
The value of said r1 is between 0.2 and 0.45, and the value of r2 is between 0.45 and 0.7, and the value of g1 is between 0.2 and 0.45, and the value of g2 is between 0.45 and 0.7.
Correcting process particularly is meant:
Calculate r1*C earlier
Brv/ C
Bbv, r2*C
Brv/ C
Bbv, g1*C
Bgv/ C
Bbv, g2*C
Bgv/ C
BbvJudge then and revise C
BrAnd C
Bg
Said judgement is also revised C
BrAnd C
BgParticularly be meant:
If C
BrLess than r1*C
Brv/ C
Bbv, C then
Br=r1*C
Brv/ C
BbvIf C
BrGreater than r2*C
Brv/ C
Bbv, C then
Br=r2*C
Brv/ C
Bbv
If C
BgLess than g1*C
Bgv/ C
Bbv, C then
Bg=g1*C
Bgv/ C
BbvIf C
BgGreater than g2*C
Bgv/ C
Bbv, C then
Bg=g2*C
Bgv/ C
Bbv
S4), pointwise correction: adopt revised correction coefficient, LED display is carried out pointwise correction.
In this embodiment, the correction coefficient that certain correction obtains is following, C
Brv=0.025, C
Bgv=0.015, C
Bbv=0.5.So according to step S3) explanation, r1*C
Brv/ C
Bbv≤C
Br≤r2*C
Brv/ C
Bbv, g1*C
Bgv/ C
Bbv≤C
Bg≤g2*C
Bgv/ C
BbvBe 0.05r1≤C
Br≤0.05r2,0.03g1≤C
Bg≤0.03g2, setting experience factor r1, r2, g1, g2 are respectively 0.4,0.6,0.35,0.55, at this moment 0.02≤C
Br≤0.03,0.0105≤C
Bg≤0.0165.The blue penalty coefficient of certain 5 LED is respectively before processing: C
Br1=0.011, C
Bg1=0.027, C
Bb1=0.48, C
Br2=0.023, C
Bg2=0.018, C
Bb2=0.47, C
Br3=0.008, C
Bg3=0.031, C
Bb3=0.49, C
Br4=0.036, C
Bg4=0.032, C
Bb4=0.51, C
Br5=0.012, C
Bg5=0.008, C
Bb5=0.48, the blue penalty coefficient of these 5 LED is through step S3) correcting process after be respectively: C
Br1=0.02, C
Bg1=0.0165, C
Bb1=0.48, C
Br2=0.023, C
Bg2=0.0165, C
Bb2=0.47, C
Br3=0.020, C
Bg3=0.0165, C
Bb3=0.49, C
Br4=0.03, C
Bg4=0.0165, C
Bb4=0.51, C
Br5=0.020, C
Bg5=0.0105, C
Bb5=0.48.
The display effect that this LED shields before the pointwise correction is not as shown in Figure 3.With all points on this LED screen according to step S3) the revised correction coefficient that draws, through step S4) processing after display effect as shown in Figure 4, visible blue snow or pit phenomenon are significantly improved.
Above content is to combine concrete preferred implementation to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.For the those of ordinary skill of technical field under the present invention, under the prerequisite that does not break away from the present invention's design, can also make some simple deduction or replace, all should be regarded as belonging to protection scope of the present invention.
Claims (10)
1. a LED display point-to-point correction system comprises: LED display, data acquisition unit, correcting unit and Video Controller; Said data acquisition unit is connected with correcting unit, and correcting unit is connected with LED display through Video Controller, it is characterized in that said LED display point-to-point correction system also comprises amending unit, and said amending unit is connected with correcting unit.
2. a kind of LED display point-to-point correction system as claimed in claim 1 is characterized in that said LED display point-to-point correction system also comprises Database Unit, and said Database Unit is connected with correcting unit with amending unit.
3. according to claim 1 or claim 2 a kind of LED display point-to-point correction system is characterized in that said data acquisition unit comprises digital camera and light gun; Said digital camera all is connected with correcting unit with light gun.
4. a LED display pointwise correction method based on the described a kind of LED display point-to-point correction system of claim 1, is shielded the pointwise correction that carries out brightness and colourity to LED, and said pointwise correction method comprises the steps: in proper order
S1), correction factor calculation is prepared: be ready to each required association of calculation correction coefficient;
S2), calculation correction coefficient: the correction coefficient C that calculates red, green, blue three looks
Rr, C
Rg, C
Rb, C
Gr, C
Gg, C
Gb, C
Br, C
Bg, C
Bb
S3), correcting process: to C
BrAnd C
BgThe processing of revising makes r1*C
Brv/ C
Bbv≤C
Br≤r2*C
Brv/ C
Bbv, g1*C
Bgv/ C
Bbv≤C
Bg≤g2*C
Bgv/ C
Bbv, wherein r1, r2, g1, g2 are experience factor, C
Bbv, C
Brv, C
BgvBe respectively C
Bb, C
Br, C
BgMean value before processing;
S4), pointwise correction: adopt revised correction coefficient, LED display is carried out pointwise correction.
5. a kind of LED display pointwise correction method as claimed in claim 4; It is characterized in that; Step S1) particularly is meant: after lighting LED display; The correcting unit of control computer sends image data acquiring and instructs to data acquisition unit, and data acquisition unit is gathered each pixel brightness and chromaticity coordinates on the LED display, and sets the brightness of red, green, blue three looks and the desired value of chromaticity coordinates through the correcting unit of control computer.
6. a kind of LED display pointwise correction method as claimed in claim 5 is characterized in that said data acquisition unit comprises digital camera and light gun, and said digital camera all is connected with correcting unit with light gun; Said brightness and chromaticity coordinates comprise absolute value and relative value; The relative value of each pixel brightness and chromaticity coordinates on the said digital camera collection LED display; Said light gun is gathered a perhaps absolute value of several pixel brightness.
7. a kind of LED display pointwise correction method as claimed in claim 6; It is characterized in that; Said correcting unit is demarcated the relative value of each pixel brightness and chromaticity coordinates according to the absolute value of said brightness; Thereby calculate the absolute value of each pixel brightness and chromaticity coordinates, combine the brightness of red, green, blue three looks and the desired value of chromaticity coordinates again, calculate the correction coefficient of red, green, blue three looks: C
Rr, C
Rg, C
Rb, C
Gr, C
Gg, C
Gb, C
Br, C
Bg, C
BbAnd export amending unit to.
8. a kind of LED display pointwise correction method as claimed in claim 7 is characterized in that said LED display point-to-point correction system also comprises Database Unit, and said Database Unit is connected with correcting unit with amending unit; Step S2) coefficient of calculation correction described in is meant: correcting unit is with the relative value of absolute value, brightness and the chromaticity coordinates of said brightness; And the brightness of red, green, blue three looks and the desired value of chromaticity coordinates send into Database Unit, calculated the correction coefficient of red, green, blue three looks: C by Database Unit
Rr, C
Rg, C
Rb, C
Gr, C
Gg, C
Gb, C
Br, C
Bg, C
BbAfter export amending unit to.
9. a kind of LED display pointwise correction method as claimed in claim 8 is characterized in that step S 3) correcting process particularly is meant:
Calculate r1*C earlier
Brv/ C
Bbv, r2*C
Brv/ C
Bbv, g1*C
Bgv/ C
Bbv, g2*C
Bgv/ C
BbvJudge then and revise C
BrAnd C
Bg
Said judgement is also revised C
BrAnd C
BgParticularly be meant:
If C
BrLess than r1*C
Brv/ C
Bbv, C then
Br=r1*C
Brv/ C
BbvIf C
BrGreater than r2*C
Brv/ C
Bbv, C then
Br=r2*C
Brv/ C
Bbv
If C
BgLess than g1*C
Bgv/ C
Bbv, C then
Bg=g1*C
Bgv/ C
BbvIf C
BgGreater than g2*C
Bgv/ C
Bbv, C then
Bg=g2*C
Bgv/ C
Bbv
10. the pointwise correction method of a kind of LED display as claimed in claim 9; It is characterized in that step S3) described in the value of r1 between 0.2 and 0.45, the value of r2 is between 0.45 and 0.7; The value of g1 is between 0.2 and 0.45, and the value of g2 is between 0.45 and 0.7.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110429253.7A CN102402944B (en) | 2011-12-20 | 2011-12-20 | Point-by-point correcting system and point-by-point correcting method for LED display screen |
| PCT/CN2012/086927 WO2013091542A1 (en) | 2011-12-20 | 2012-12-19 | Led display screen point-by-point correction system and point-by-point correction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN102402944B (en) | 2014-11-12 |
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