CN110930934A - Correction algorithm for standardized product of display screen - Google Patents
Correction algorithm for standardized product of display screen Download PDFInfo
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- CN110930934A CN110930934A CN201811118300.4A CN201811118300A CN110930934A CN 110930934 A CN110930934 A CN 110930934A CN 201811118300 A CN201811118300 A CN 201811118300A CN 110930934 A CN110930934 A CN 110930934A
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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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Abstract
The invention discloses a correction algorithm of a standardized product of a display screen, which comprises the following calculation steps: s1: defining color temperature and establishing corresponding vector coordinates; s2, setting the standard brightness as L, wherein L is LR + LG + LB; setting the RGB ratio of the color temperature S as x, y and z; obtaining a corresponding data formula; s3: actual measurements yield primary color data, single red: LR ═ x × L/x + y + z, single green: LG ═ y × L/x + y + z, single blue: LB ═ z × L/x + y + z; s4: setting the brightness correction coefficients as Kr, Kg and Kb; obtaining a matching formula with the brightness of each primary color; s5: the coefficients of Kr, Kg, Kb are obtained. The invention can effectively detect the RGB primary colors of the standardized product, and solves the problems of color temperature consistency, color consistency and brightness consistency when the COBLED display screen displays.
Description
Technical Field
The invention relates to the field of COB (chip on board) display screens, in particular to a correction algorithm of a display screen standardized product.
Background
At present, an LED full-color display screen is a module display screen which encapsulates LED red, green and blue chips into SMD and then pastes the SMD on a PCB through printing, chip mounting, reflow soldering and other process flows. The SMD used by the module above P2 is an SMD device which is made by encapsulating a chip on a support and mainly carrying out die bonding, wire bonding, dispensing, light splitting, taping and packaging; the SMD used in the module below P2 is manufactured by encapsulating chips on two layers of PCBs, and performing die bonding, wire bonding, injection molding and groove grinding, cutting, light splitting, taping and packaging.
The premise of standardized production of the display screen is that for color temperature and color consistency, the traditional algorithm can only be used for monochrome correction, namely R, G, B monochrome consistency and can also be used for color temperature correction, but cannot be used for standardized products, so that a correction algorithm applied to the standardized products needs to be designed.
Disclosure of Invention
The invention aims to provide a correction algorithm of a display screen standardized product to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
an algorithm for correcting a standardized product on a display screen, the algorithm comprising the following calculation steps:
s1: defining color temperature, respectively marking three primary colors of light, namely red, green and blue, as R (red), G (green) and B (blue), and establishing corresponding vector coordinates;
s2: setting the standard brightness as L, wherein L is LR + LG + LB; setting the RGB ratio of the color temperature S as x, y and z;
the following formula is obtained:
namely: LR ═ x L/x + y + z
LG＝y*L/x+y+z
LB＝z*L/x+y+z；
S3: the actual measurement results in primary color data,
single red: LR ═ x L/x + y + z
Single green: LG ═ y × L/x + y + z
Single blue: LB ═ z × L/x + y + z;
s4: setting the brightness correction coefficients as Kr, Kg and Kb; the following equation is obtained:
LR＝Rr*Kr+Gr*Kg+Br*Kb
LG＝Rg*Kr+Gg*Kg+Bg*Kb
LB＝Rb*Kr+Gb*Kg+Bb*Kb
thereby deducing:
x*[L/(x+y+z)]＝Rr*Kr+Gr*Kg+Br*Kb
y*[L/(x+y+z)]＝Rg*Kr+Gg*Kg+Bg*Kb
z*[L/(x+y+z)]＝Rb*Kr+Gb*Kg+Bb*Kb
s5: the coefficients of Kr, Kg and Kb are obtained as follows:
Find(Kr、Kg、Kb)→
(Bb*Gg*L*x—Bg*Gb*L*x—Bb*Gr*L*y+Br*Gb*L*y+Bg*Gr*L*z+Br*Gg*L*z)÷(Bb*Gg*Gr*x—Br*Gb*Gg*x+Bb*Gg*Gr*y—Br*Gb*Gg*y+Bb*Gg*Gr*z—Br*Gb*Gg*z—Bb*Gg*Rr*x+Bg*Gb*Rr*x—Bg*Gb*Rr*x+Br*Gg*Rb*x—Bb*Gg*Rr*y+Bg*Gb*Rr*y—Bg*Gr*Rb*y+Br*Gg*Rb*y—Bb*Gg*Rr*z+Bg*Gb*Rr*z—Bg*Gr*Rb*z+Br*Gg*Rb*z)；
(Bb*Gg*L*x—Br*Gg*L*z—Bg*Gr*L*x—Bb*Rr*L*y+Br*Rb*L*y+Bg*Gr*L*z)÷(Bb*Gg*Gr*x—Br*Gb*Gg*x+Bb*Gg*Gr*y—Br*Gb*Gg*y+Bb*Gg*Gr*z—Br*Gb*Gg*z—Bb*Gg*Rr*x+Bg*Gb*Rr*x—Bg*Gb*Rr*x+Br*Gg*Rb*x—Bb*Gg*Rr*y+Bg*Gb*Rr*y—Bg*Gr*Rb*y+Br*Gg*Rb*y—Bb*Gg*Rr*z+Bg*Gb*Rr*z—Bg*Gr*Rb*z+Br*Gg*Rb*z)；
(Gb*Gg*L*x—Gg*Gr*L*z—Gg*Rb*L*x—Gb*Rr*L*y+Gr*Rb*L*y+Gg*Rr*L*z)÷(Bb*Gg*Gr*x—Br*Gb*Gg*x+Bb*Gg*Gr*y—Br*Gb*Gg*y+Bb*Gg*Gr*z—Br*Gb*Gg*z—Bb*Gg*Rr*x+Bg*Gb*Rr*x—Bg*Gb*Rr*x+Br*Gg*Rb*x—Bb*Gg*Rr*y+Bg*Gb*Rr*y—Bg*Gr*Rb*y+Br*Gg*Rb*y—Bb*Gg*Rr*z+Bg*Gb*Rr*z—Bg*Gr*Rb*z+Br*Gg*Rb*z)。
as a further scheme of the invention: the primary color data was measured using a chromatographic luminance meter.
As a further scheme of the invention: and the display screen adopts color gamut coding to carry out color mixing processing on the display screen standardized product.
As a still further scheme of the invention: the color gamut encoding converts RGB to YUV color space to maintain compatibility, and then converts back to RGB format as required to display color graphics on a computer display.
Compared with the prior art, the invention has the beneficial effects that: the method can effectively detect the RGB primary colors of the standardized products, break through the RGB primary colors to obtain the corresponding three-primary-color ratio numerical values of the COB display screen, and can timely adjust the products; the color temperature consistency, the color consistency and the brightness consistency of the COBLED display screen during display are solved.
Drawings
Fig. 1 is a coordinate vector diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the embodiment of the invention, the correction algorithm of the display screen standardized product comprises the following calculation steps:
s1: defining color temperature, respectively identifying three primary colors of light, namely red, green and blue, as R (red), G (green) and B (blue), and establishing corresponding vector coordinates (as shown in FIG. 1);
s2: setting the standard brightness as L, wherein L is LR + LG + LB; setting the RGB ratio of the color temperature S as x, y and z;
the following formula is obtained:
namely: LR ═ x L/x + y + z
LG＝y*L/x+y+z
LB＝z*L/x+y+z；
S3: the actual measurement results in primary color data,
single red: LR ═ x L/x + y + z
Single green: LG ═ y × L/x + y + z
Single blue: LB ═ z × L/x + y + z;
s4: setting the brightness correction coefficients as Kr, Kg and Kb; the following equation is obtained:
LR＝Rr*Kr+Gr*Kg+Br*Kb
LG＝Rg*Kr+Gg*Kg+Bg*Kb
LB＝Rb*Kr+Gb*Kg+Bb*Kb
thereby deducing:
x*[L/(x+y+z)]＝Rr*Kr+Gr*Kg+Br*Kb
y*[L/(x+y+z)]＝Rg*Kr+Gg*Kg+Bg*Kb
z*[L/(x+y+z)]＝Rb*Kr+Gb*Kg+Bb*Kb
s5: the coefficients of Kr, Kg and Kb are obtained as follows:
Find(Kr、Kg、Kb)→
(Bb*Gg*L*x—Bg*Gb*L*x—Bb*Gr*L*y+Br*Gb*L*y+Bg*Gr*L*z+Br*Gg*L*z)÷(Bb*Gg*Gr*x—Br*Gb*Gg*x+Bb*Gg*Gr*y—Br*Gb*Gg*y+Bb*Gg*Gr*z—Br*Gb*Gg*z—Bb*Gg*Rr*x+Bg*Gb*Rr*x—Bg*Gb*Rr*x+Br*Gg*Rb*x—Bb*Gg*Rr*y+Bg*Gb*Rr*y—Bg*Gr*Rb*y+Br*Gg*Rb*y—Bb*Gg*Rr*z+Bg*Gb*Rr*z—Bg*Gr*Rb*z+Br*Gg*Rb*z)；
(Bb*Gg*L*x—Br*Gg*L*z—Bg*Gr*L*x—Bb*Rr*L*y+Br*Rb*L*y+Bg*Gr*L*z)÷(Bb*Gg*Gr*x—Br*Gb*Gg*x+Bb*Gg*Gr*y—Br*Gb*Gg*y+Bb*Gg*Gr*z—Br*Gb*Gg*z—Bb*Gg*Rr*x+Bg*Gb*Rr*x—Bg*Gb*Rr*x+Br*Gg*Rb*x—Bb*Gg*Rr*y+Bg*Gb*Rr*y—Bg*Gr*Rb*y+Br*Gg*Rb*y—Bb*Gg*Rr*z+Bg*Gb*Rr*z—Bg*Gr*Rb*z+Br*Gg*Rb*z)；
(Gb*Gg*L*x—Gg*Gr*L*z—Gg*Rb*L*x—Gb*Rr*L*y+Gr*Rb*L*y+Gg*Rr*L*z)÷(Bb*Gg*Gr*x—Br*Gb*Gg*x+Bb*Gg*Gr*y—Br*Gb*Gg*y+Bb*Gg*Gr*z—Br*Gb*Gg*z—Bb*Gg*Rr*x+Bg*Gb*Rr*x—Bg*Gb*Rr*x+Br*Gg*Rb*x—Bb*Gg*Rr*y+Bg*Gb*Rr*y—Bg*Gr*Rb*y+Br*Gg*Rb*y—Bb*Gg*Rr*z+Bg*Gb*Rr*z—Bg*Gr*Rb*z+Br*Gg*Rb*z)。
the working principle of the invention is illustrated as follows:
1) in the process of manufacturing a display screen, the brightness is designed to be:
3:1:6＝R:G:B；
2) considering the uniformity of the lamp brightness, all 80% of the brightness is calculated to give the following formula:
R＝(Rr+Rg+Rb)Kr
G＝(Gr+Gg+Gb)Kg
B＝(Br+Bg+Bb)Kb
further, it can be deduced that:
R’＝RrKr+GrKg+BrKb
G’＝RgKr+GgKg+BgKb
B’＝RbKr+GbKg+BbKb
so as to derive the values of Kr, Kg and Kb, and make the monochrome correction.
3) If the calculation result can not satisfy: 3:1:6 ═ R: G: B; the toning process is performed again.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (4)
1. A correction algorithm for standardized products of display screens is characterized by comprising the following calculation steps:
s1: defining color temperature, respectively marking three primary colors of light, namely red, green and blue, as R (red), G (green) and B (blue), and establishing corresponding vector coordinates;
s2: setting the standard brightness as L, wherein L is LR + LG + LB; setting the RGB ratio of the color temperature S as x, y and z;
the following formula is obtained:
namely: LR ═ x L/x + y + z
LG＝y*L/x+y+z
LB＝z*L/x+y+z；
S3: the actual measurement results in primary color data,
single red: LR ═ x L/x + y + z
Single green: LG ═ y × L/x + y + z
Single blue: LB ═ z × L/x + y + z;
s4: setting the brightness correction coefficients as Kr, Kg and Kb; the following equation is obtained:
LR＝Rr*Kr+Gr*Kg+Br*Kb
LG＝Rg*Kr+Gg*Kg+Bg*Kb
LB＝Rb*Kr+Gb*Kg+Bb*Kb；
thereby deducing:
x*[L/(x+y+z)]＝Rr*Kr+Gr*Kg+Br*Kb
y*[L/(x+y+z)]＝Rg*Kr+Gg*Kg+Bg*Kb
z*[L/(x+y+z)]＝Rb*Kr+Gb*Kg+Bb*Kb；
s5: the coefficients of Kr, Kg and Kb are obtained as follows:
Find(Kr、Kg、Kb)→
(Bb*Gg*L*x—Bg*Gb*L*x—Bb*Gr*L*y+Br*Gb*L*y+Bg*Gr*L*z+Br*Gg*L*z)÷(Bb*Gg*Gr*x—Br*Gb*Gg*x+Bb*Gg*Gr*y—Br*Gb*Gg*y+Bb*Gg*Gr*z—Br*Gb*Gg*z—Bb*Gg*Rr*x+Bg*Gb*Rr*x—Bg*Gb*Rr*x+Br*Gg*Rb*x—Bb*Gg*Rr*y+Bg*Gb*Rr*y—Bg*Gr*Rb*y+Br*Gg*Rb*y—Bb*Gg*Rr*z+Bg*Gb*Rr*z—Bg*Gr*Rb*z+Br*Gg*Rb*z)；
(Bb*Gg*L*x—Br*Gg*L*z—Bg*Gr*L*x—Bb*Rr*L*y+Br*Rb*L*y+Bg*Gr*L*z)÷(Bb*Gg*Gr*x—Br*Gb*Gg*x+Bb*Gg*Gr*y—Br*Gb*Gg*y+Bb*Gg*Gr*z—Br*Gb*Gg*z—Bb*Gg*Rr*x+Bg*Gb*Rr*x—Bg*Gb*Rr*x+Br*Gg*Rb*x—Bb*Gg*Rr*y+Bg*Gb*Rr*y—Bg*Gr*Rb*y+Br*Gg*Rb*y—Bb*Gg*Rr*z+Bg*Gb*Rr*z—Bg*Gr*Rb*z+Br*Gg*Rb*z)；
(Gb*Gg*L*x—Gg*Gr*L*z—Gg*Rb*L*x—Gb*Rr*L*y+Gr*Rb*L*y+Gg*Rr*L*z)÷(Bb*Gg*Gr*x—Br*Gb*Gg*x+Bb*Gg*Gr*y—Br*Gb*Gg*y+Bb*Gg*Gr*z—Br*Gb*Gg*z—Bb*Gg*Rr*x+Bg*Gb*Rr*x—Bg*Gb*Rr*x+Br*Gg*Rb*x—Bb*Gg*Rr*y+Bg*Gb*Rr*y—Bg*Gr*Rb*y+Br*Gg*Rb*y—Bb*Gg*Rr*z+Bg*Gb*Rr*z—Bg*Gr*Rb*z+Br*Gg*Rb*z)。
2. the correction algorithm for display screen standardized products according to claim 1, wherein the primary color data is measured using a color spectrum luminance meter.
3. The correction algorithm for the display screen standardized product according to claim 1, wherein the display screen adopts color gamut coding to perform color matching processing on the display screen standardized product.
4. The correction algorithm for display screen normalization product of claim 3, wherein the color gamut encoding converts RGB to YUV color space to maintain compatibility and back to RGB format as needed for displaying color graphics on a computer monitor.
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Application publication date: 20200327 |