CN1543227B - A method for correcting chroma space transformation of panel display screen - Google Patents

Abstract

This invention relates to a method for correcting a panel display screen chromaticity space transformation. On the basis of determining converting the primary color display function property and the chromaticity space parameter of the reference system and the primary color driven property and the chromaticity space parameter of the chromaticity space conversion system, the transformation is used to finish said conversion between the same kind of display screens with the nonlinear primary color display function property and conversion between different kinds of screens of the entirely differentprimary color properties. An assumed primary standard is introduced to evaluate a conversion factor list or different modules relates to the primary standard chromaticity space to correct the relateddisplay modules to set up a unified primary standard chromaticity space on the display screen and overcome the shortcomings of non-uniform distribution of chromaticity and brightness on a same paneldisplay screen.

Description

A kind of panel display screen chroma space modification method

Technical field: the invention belongs to dull and stereotyped video display technology field, relate to improvement to flat-panel monitor image display quality, display color and uniformity control technology.

Background technology: for panel display screen, its chrominance space determine to depend on multiple factor.The colorimetric properties that each primary colours of panel display screen are arranged that play a major role in these factors, the allocation of parameters between light characteristic and the primary colours, therefore the different colors that panel display screen showed exists the difference of chrominance space owing to the difference of above-mentioned factor.In order accurately to represent the chrominance space of a display system, the cie color standard usually is introduced into and is used for describing the chrominance space scope of a display system.

According to the basic principle of colorimetry,, can obtain the corresponding empty primary colours expression formula of this display system according to empty primary colours X, Y, the Z of colorimetry definition for some display systems:

$\left\{\begin{array}{c}X=X_{r}R+X_{g}G+X_{b}B\\ Y=Y_{r}R+Y_{g}G+Y_{b}B\\ Z=Z_{r}R+Z_{g}G+Z_{b}B\end{array}\right.---\left(1\right)$

Wherein, X _r, Y _rAnd Z _rBe illustrated in the component coefficient that empty primary colours X, Y, Z occupy respectively among the primary colours R; X _g, Y _gAnd Z _gBe illustrated in the component coefficient that empty primary colours X, Y, Z occupy respectively among the primary colours G; X _b, Y _bAnd Z _bBe illustrated in the component coefficient that empty primary colours X, Y, Z occupy respectively among the primary colours B; Main determining factor for chrominance space that a panel display screen more clearly is described can expand into (1) formula:

$\left\{\begin{array}{c}X=C_r{X}_{r}R+C_g{X}_{g}G+C_b{X}_{b}B\\ Y=C_r{Y}_{r}R+C_g{Y}_{g}G+C_b{Y}_{b}B\\ Z=C_r{Z}_{r}R+C_g{Z}_{g}G+C_b{Z}_{b}B\end{array}\right.---\left(2\right)$

C in formula _r, C _g, C _bAllocation of parameters between the expression primary colours, X _r, Y _rAnd Z _rThe chromaticity coordinate of expression red primary, X _g, Y _gAnd Z _gThe chromaticity coordinate of expression green primary, X _b, Y _bAnd Z _bThe chromaticity coordinate of expression blue primary; From formula (2), can see, in a panel display screen, if the colorimetric properties X of its primary colours _r, Y _r, Z _r, X _g, Y _g, Z _g, X _g, Y _gAnd Z _g, the allocation of parameters C between light characteristic (maximum of primary colours R, G, B) and the primary colours _r, C _g, C _bIn case determine, its chrominance space has been determined with regard to unique so.

If there are two display screens, the colorimetric properties of its each primary colours, allocation of parameters all exists difference between light characteristic and the primary colours; The chrominance space parameter of supposing one of them display screen is: x _Rref1, y _Rref1, z _Rref1, x _Gref1, y _Gref1, z _Gref1, x _Bref1, y _Bref1, z _Bref1, C _Rref1, C _Gref1, C _Bref1And the chrominance space parameter of another display screen is: x _Rref2, y _Rref2, z _Rref2, x _Gref2, y _Gref2, z _Gref2, x _Bref2, y _Bref2, z _Bref2, C _Rrfe2, C _Gref2, C _Bref2The chrominance space of the display screen of front can be expressed as so:

$\left\{\begin{array}{c}X=C_{\mathrm{rref}1}{x}_{\mathrm{rref}1}{R}_{\mathrm{ref}1}+C_{\mathrm{gref}1}{x}_{\mathrm{gref}1}{G}_{\mathrm{ref}1}+C_{\mathrm{bref}1}{x}_{\mathrm{bref}1}{B}_{\mathrm{ref}1}\\ Y=C_{\mathrm{rref}1}{y}_{\mathrm{rref}1}{R}_{\mathrm{ref}1}+C_{\mathrm{gref}1}{y}_{\mathrm{gref}1}{G}_{\mathrm{ref}1}+C_{\mathrm{bref}1}{y}_{\mathrm{bref}1}{B}_{\mathrm{ref}1}\\ Z=C_{\mathrm{rref}1}{z}_{\mathrm{rref}1}{R}_{\mathrm{ref}1}+C_{\mathrm{gref}1}{z}_{\mathrm{gref}1}{G}_{\mathrm{ref}1}+C_{\mathrm{bref}1}{z}_{\mathrm{bref}1}{B}_{\mathrm{ref}1}\end{array}\right.---\left(3\right)$

The chrominance space of another display screen then is:

$\left\{\begin{array}{c}X=C_{\mathrm{rref}2}{x}_{\mathrm{rref}2}{R}_{\mathrm{ref}2}+C_{\mathrm{gref}2}{x}_{\mathrm{gref}2}{G}_{\mathrm{ref}2}+C_{\mathrm{bref}2}{x}_{\mathrm{bref}2}{B}_{\mathrm{ref}2}\\ Y=C_{\mathrm{rref}2}{y}_{\mathrm{rref}2}{R}_{\mathrm{ref}2}+C_{\mathrm{gref}2}{y}_{\mathrm{gref}2}{G}_{\mathrm{ref}2}+C_{\mathrm{bref}2}{y}_{\mathrm{bref}2}{B}_{\mathrm{ref}2}\\ Z=C_{\mathrm{rref}2}{z}_{\mathrm{rref}2}{R}_{\mathrm{ref}2}+C_{\mathrm{gref}2}{z}_{\mathrm{gref}2}{G}_{\mathrm{ref}2}+C_{\mathrm{bref}2}{z}_{\mathrm{bref}2}{B}_{\mathrm{ref}2}\end{array}\right.---\left(4\right)$

Obviously, the chrominance space of these two display screens only is only under the identical situation of chrominance space parameter and is equal to fully.And under other condition, all there is aberration in two display screens when showing the color of appointment.

If do not consider the difference of two absolute brightness values between the display screen, can finish the conversion of chrominance space between the display screen.Can derive two transformation parameter and correlated conditions between the different chrominance spaces according to above-mentioned formula (3), (4).And these formula can provide strong support for the designer carries out chromaticity transformation.

Conversion parameter is a very important factor in the conversion, will play the empty primary colours replacement of mapping effect according to above-mentioned formula, can obtain second with reference to display screen to first corresponding conversion coefficient with reference to each fine chrominance primary of display screen.With primary colours R in second frame of reference _Ref2Be example, its corresponding conversion coefficient has C _Ref2-ref1 ^Rr, C _Ref2-ref1 ^RgAnd C _Ref2-ref1 ^RB, its expression formula is as follows

$\left\{\begin{array}{c}{C_{\mathrm{ref}2-\mathrm{ref}1}}^{\mathrm{rr}}=\frac{C_{\mathrm{ref}1}\left|\begin{array}{ccc}{x}_{\mathrm{rref}1}& x_{\mathrm{gref}2}& x_{\mathrm{bref}2}\\ y_{\mathrm{rref}1}& y_{\mathrm{gref}2}& y_{\mathrm{bref}2}\\ z_{\mathrm{rref}1}& z_{\mathrm{gref}2}& z_{\mathrm{bref}2}\end{array}\right|}{C_{\mathrm{rref}2}\·{\mathrm{\Δ}}_{\mathrm{ref}2}}\\ {C_{\mathrm{ref}2-\mathrm{ref}1}}^{\mathrm{rg}}=\frac{C_{\mathrm{gref}1}\left|\begin{array}{ccc}{x}_{\mathrm{gref}1}& x_{\mathrm{gref}2}& x_{\mathrm{bref}2}\\ y_{\mathrm{gref}1}& y_{\mathrm{gref}2}& y_{\mathrm{bref}2}\\ z_{\mathrm{gref}1}& z_{\mathrm{gref}2}& z_{\mathrm{bref}2}\end{array}\right|}{C_{\mathrm{rref}2}\·{\mathrm{\Δ}}_{\mathrm{ref}2}}\\ {C_{\mathrm{ref}2-\mathrm{ref}1}}^{\mathrm{rb}}=\frac{C_{\mathrm{bref}1}\left|\begin{array}{ccc}{x}_{\mathrm{bref}1}& x_{\mathrm{gref}2}& x_{\mathrm{bref}2}\\ y_{\mathrm{bref}1}& y_{\mathrm{gref}2}& y_{\mathrm{bref}2}\\ z_{\mathrm{bref}1}& z_{\mathrm{gref}2}& z_{\mathrm{bref}2}\end{array}\right|}{C_{\mathrm{rref}2}\·{\mathrm{\Δ}}_{\mathrm{ref}2}}\end{array}\right.---\left(5\right)$

Δ wherein _Ref2For $\left|\begin{array}{ccc}{x}_{\mathrm{rref}2}& x_{\mathrm{gref}2}& x_{\mathrm{bref}2}\\ y_{\mathrm{rref}2}& y_{\mathrm{gref}2}& y_{\mathrm{bref}2}\\ z_{\mathrm{rref}2}& z_{\mathrm{gref}2}& z_{\mathrm{bref}2}\end{array}\right|$

Equally, can obtain C _Ref2-ref1 ^Gr, C _Ref2-ref1 ^Gg, C _Ref2-ref1 ^Gb, C _Ref2-ref1 ^Br, C _Ref2-ref1 ^Bg, C _Ref2-ref1 ^BbConcrete outcome, transfer equation just can be written as like this

$\left\{\begin{array}{c}{R}_{\mathrm{ref}2}={C_{\mathrm{ref}2-\mathrm{ref}1}}^{\mathrm{rr}}{R}_{\mathrm{ref}1}+{C_{\mathrm{ref}2-\mathrm{ref}1}}^{\mathrm{rg}}{G}_{\mathrm{ref}1}+{C_{\mathrm{ref}2-\mathrm{ref}1}}^{\mathrm{rb}}{B}_{\mathrm{ref}1}\\ G_{\mathrm{ref}2}={C_{\mathrm{ref}2-\mathrm{ref}1}}^{\mathrm{gr}}{R}_{\mathrm{ref}1}+{C_{\mathrm{ref}2-\mathrm{ref}1}}^{\mathrm{gg}}{G}_{\mathrm{ref}1}+{C_{\mathrm{ref}2-\mathrm{ref}1}}^{\mathrm{gb}}{B}_{\mathrm{ref}1}\\ B_{\mathrm{ref}2}={C_{\mathrm{ref}2-\mathrm{ref}1}}^{\mathrm{br}}{R}_{\mathrm{ref}1}+{C_{\mathrm{ref}2-\mathrm{ref}1}}^{\mathrm{bg}}{G}_{\mathrm{ref}1}+{C_{\mathrm{ref}2-\mathrm{ref}1}}^{\mathrm{bb}}{B}_{\mathrm{ref}1}\end{array}\right.---\left(6\right)$

Be directed to first each color numerical value [R like this with reference to display screen _Ref1, G _Ref1, B _Ref1], second all has corresponding converting colors numerical value [R with reference to display screen _Ref2, G _Ref2, B _Ref2] in correspondence, thereby finish the elimination of aberration.Realize principle in order more clearly to illustrate it, briefly introduce its groundwork process:

This two with reference to the chroma conversion course of work between the display screen as shown in Figure 1: by red primary input recording controller 1, green primary input recording controller 2, blue primary input recording controller 3, control logic 4, conversion coefficient C _Ref2-ref1 ^RrMemory 5, conversion coefficient C _Ref2-ref1 ^RgMemory 6, conversion coefficient C _Ref2-ref1 ^RbMemory 7, conversion coefficient C _Ref2-ref1 ^GrMemory 8, conversion coefficient C _{Ref2 Ref1} ^GgMemory 9, conversion coefficient C _Ref2-ref1 ^GbMemory 10, conversion coefficient C _Ref2-ref1 ^BrMemory 11, conversion coefficient C _Ref2-ref1 ^BgMemory 12, conversion coefficient C _Ref2-ref1 ^BbMemory 13, red primary operational multiplier 14,15,16, green primary operational multiplier 17,18,19, blue primary operational multiplier 20,21,22, red primary computing adder 23, green primary computing adder 24, blue primary computing adder 25, red primary dateout 26, green primary dateout 27, blue primary dateout 28 is formed, and is produced the basic clock signal of control circuit by control logic 4; Red primary input recording controller 1, green primary input recording controller 2, blue primary input recording controller 3 each primary colours of storage are in this real time data constantly; The corresponding primary colours conversion coefficient of conversion coefficient memory 5,6,7,8,9,10,11,12,13 storages; Red primary operational multiplier 14,15,16 is used for finishing the coefficient computing of red primary; Green primary operational multiplier 17,18,19 is used for finishing the coefficient computing of green primary; Blue primary operational multiplier 20,21,22 is used for finishing the coefficient computing of blue primary; Red primary computing adder 23 is used for forming final red primary dateout 26; Green primary computing adder 24 is used for forming final green primary dateout 27; Blue primary computing adder 25 is used for forming final blue primary dateout 28; Its course of work is: control logic 4 produces data strobe signal and sends red primary input recording controller 1 to by control line a at each display element in the cycle, green primary input recording controller 2, blue primary input recording controller 3, make red primary input data input to red primary operational multiplier 14 by data wire e, green primary operational multiplier 17, blue primary operational multiplier 20, green primary input data input to red primary operational multiplier 15 by data wire f, green primary operational multiplier 18, blue primary operational multiplier 21, blue primary input data input to red primary operational multiplier 17 by data wire g, green primary operational multiplier 19, blue primary operational multiplier 22, meanwhile, produce the coefficient gating signal and send conversion coefficient memory 5 to by address wire b, 6,7,8,9,10,11,12,13, make corresponding coefficient by data wire h, i, j, k, l, m, n, p, q sends red primary operational multiplier 14 to, 15,16, green primary operational multiplier 17,18,19, blue primary operational multiplier 20,21,22.Control logic 4 produces the computing signal and sends red primary operational multiplier 14,15,16 to, green primary operational multiplier 17,18,19, blue primary operational multiplier 20,21,22 by control line c then; A produce and result sends into red primary computing adder 23, green primary computing adder 24 and blue primary computing adder 25 by data wire r1, r2, r3, g1, g2, g3, b1, b2, b3.Under the control signal effect that control logic 4 is transmitted by control line d, red primary computing adder 23, green primary computing adder 24 and blue primary computing adder 25 produce final operation result.Proceed aforesaid operations in the next display element cycle, until the conversion of finishing whole pixel datas.If, the primary colours chromaticity coordinate triangle that the display screen that need carry out chrominance space conversion is linearity with the primary colours explicit function characteristic of the display screen that is referenced and carries out the display screen of chrominance space conversion covers the primary colours chromaticity coordinate triangle of the display screen that is referenced fully, and the conversion method of above-mentioned chrominance space can make the aberration of two display screens effectively be eliminated.

Summary of the invention: the objective of the invention is to solve background technology at primary colours explicit function characteristic be between the nonlinear same class display screen between chrominance space conversion and the diverse variety classes display screen of primary colours explicit function characteristic the big and brightness appearance of the colourity error of chrominance space conversion than shortcomings such as large deviations, simultaneously based on the principle of colorimetry and the conversion method of this chrominance space, proposed to overcome the panel display screen colourity that causes owing to the difference of the chrominance space characteristic of each display module (display element) and primary colours explicit function characteristic with a kind of panel display screen and the effective ways of Luminance Distribution inequality. to achieve these goals, the present invention adopts a kind of panel display screen chroma space modification method, and implementation step is as follows:

(1) the primary colours explicit function characteristic of determining the chroma space reference system is:

$\left\{\begin{array}{c}{\mathrm{RL}}_{\mathrm{ref}1}={\mathrm{\Φ}}_R\left(R_{\mathrm{ref}1}\right)\\ {\mathrm{GL}}_{\mathrm{ref}1}={\mathrm{\Φ}}_G\left(G_{\mathrm{ref}1}\right)\\ {\mathrm{BL}}_{\mathrm{ref}1}={\mathrm{\Φ}}_B\left(B_{\mathrm{ref}1}\right)\end{array}\right.$

(2) determine the chrominance space parameter of chroma space reference system;

(3) the definite primary colours drive characteristic that need carry out the display screen of chrominance space conversion:

$\left\{\begin{array}{c}{\mathrm{RL}}_{\mathrm{ref}2}={\mathrm{\Ψ}}_R\left(R_{\mathrm{ref}2}\right)\\ {\mathrm{GL}}_{\mathrm{ref}2}={\mathrm{\Ψ}}_G\left(G_{\mathrm{ref}2}\right)\\ {\mathrm{BL}}_{\mathrm{ref}2}={\mathrm{\Ψ}}_B\left(B_{\mathrm{ref}2}\right)\end{array}\right.$

(4) the definite chrominance space parameter that need carry out the display screen of chrominance space conversion;

(5) the chrominance space parameter by above-mentioned reference system and converting system forms conversion coefficient;

(6) deposit above-mentioned conversion coefficient in the conversion coefficient memory;

(7) video data is by the primary colours explicit function converter of reference system under control logic control, and the chrominance space conversion array by background technology carries out computing then;

(8), finish primary colours explicit function characteristic and be chrominance space conversion between the chrominance space conversion and the diverse variety classes display screen of primary colours explicit function characteristic between the nonlinear same class display screen according to the chrominance space translation data of above-mentioned steps (7) computing primary colours drive characteristic inverse converter by converting system;

(9) at each primary colours minimum brightness numerical value and the primary colours chromaticity coordinate triangle smallest coverage of determining each display module (display element) with each display module of a kind of panel display screen (display element) chrominance space characteristic and primary colours explicit function property difference situation;

(10) set flat panel display screen reference colours degree space according to above-mentioned steps (9);

$\left\{\begin{array}{c}X=C_{r\min }{x}_{r\min }{\mathrm{RL}}_{\mathrm{ref}}+C_{g\min }{x}_{g\min }{\mathrm{GL}}_{\mathrm{ref}}+C_{b\min }{x}_{b\min }{\mathrm{BL}}_{\mathrm{ref}}\\ Y=C_{r\min }{y}_{r\min }{\mathrm{RL}}_{\mathrm{ref}}+C_{g\min }{y}_{g\min }{\mathrm{GL}}_{\mathrm{ref}}+C_{b\min }{y}_{b\min }{\mathrm{BL}}_{\mathrm{ref}}\\ Z=C_{r\min }{z}_{r\min }{\mathrm{RL}}_{\mathrm{ref}}+C_{g\min }{z}_{g\min }{\mathrm{GL}}_{\mathrm{ref}}+C_{b\min }{z}_{b\min }{\mathrm{BL}}_{\mathrm{ref}}\end{array}\right.$

(11) the concrete display module that obtains at random according to above-mentioned steps (9) is C to the corresponding conversion coefficient of benchmark chrominance space _Rnd-min ^Rr, C _Rnd-min ^Rg, C _Rnd-min ^RB, C _Rnd-min ^Gb, C _Rnd-min ^Gg, C _Rnd-min ^Gb, C _Rnd-min ^Br, C _Rnd-min ^Bg, C _Rnd-min ^Bb

(12) determine benchmark chrominance space primary colours explicit function characteristic and concrete display module primary colours drive characteristic;

$\left\{\begin{array}{c}{\mathrm{RL}}_{\min }={\mathrm{\Φ}}_{R\min }\left(R\right)\\ {\mathrm{GL}}_{\min }={\mathrm{\Φ}}_{G\min }\left(G\right)\\ {\mathrm{BL}}_{\min }={\mathrm{\Φ}}_{B\min }\left(B\right)\end{array}\right.$ With $\left\{\begin{array}{c}{\mathrm{RL}}_{\mathrm{rnd}}={\mathrm{\Ψ}}_{\mathrm{Rrnd}}\left(R\right)\\ {\mathrm{GL}}_{\mathrm{rnd}}={\mathrm{\Ψ}}_{\mathrm{Grnd}}\left(G\right)\\ {\mathrm{BL}}_{\mathrm{rnd}}={\mathrm{\Ψ}}_{\mathrm{Brnd}}\left(B\right)\end{array}\right.$

(13) video data is imported concrete display module to the corresponding conversion coefficient of benchmark chrominance space simultaneously by the primary colours explicit function converter of benchmark chrominance space under control logic control, and the chrominance space conversion array by background technology carries out computing then;

(14) pass through this concrete display module primary colours drive characteristic inverse converter according to the chrominance space translation data of above-mentioned steps (11) computing, finish the colourity with a kind of panel display screen, the correction of brightness inconsistency.

At first, by formula (2) as can be known, the chrominance space conversion mainly is aimed at the actual quantity of primary colours in the display screen, rather than the numerical value of its video data; And the actual quantity of primary colours is determined by primary colours explicit function characteristic with the corresponding relation of the numerical value of video data, if the primary colours of a display screen drive display characteristic and there are differences with primary colours explicit function characteristic, this display screen can produce the deviation aspect brightness and the colourity when adopting video data to show so; For fear of the generation of this phenomenon, display screen all will drive display characteristic to it according to primary colours explicit function characteristic and be proofreaied and correct, and makes the actual quantity of its display primary satisfy primary colours explicit function characteristic.In general, present standard picture source is definite at a certain display device (system), and so in fact, the primary colours that the explicit function characteristic of each primary colours is equal to this display device (system) basically drive display characteristic; If the video data of the display screen that is referenced is not the standard picture source, and at himself video data, the explicit function characteristic of its primary colours is exactly that primary colours itself drive display characteristic so.Therefore, not colinerity matter as long as in the system that carries out the chrominance space conversion, the primary colours explicit function characteristic of a display screen is arranged, chroma conversion will be brought deviation in various degree so; Simultaneously, after the conversion primary color amounts generated, the primary colours driving display characteristic that also will look the conversion display screen was transformed to video data with primary color amounts and offers display driver circuit.The primary colours explicit function characteristic of supposing the display screen that is referenced is:

$\left\{\begin{array}{c}{\mathrm{RL}}_{\mathrm{ref}1}={\mathrm{\Φ}}_R\left(R_{\mathrm{ref}1}\right)\\ {\mathrm{GL}}_{\mathrm{ref}1}={\mathrm{\Φ}}_G\left(G_{\mathrm{ref}1}\right)\\ {\mathrm{BL}}_{\mathrm{ref}1}={\mathrm{\Φ}}_B\left(B_{\mathrm{ref}1}\right)\end{array}\right.---\left(7\right)$

RL wherein _Ref1Be the actual quantity of the display screen red primary that is referenced, GL _Ref1Be the actual quantity of the display screen green primary that is referenced, BL _Ref1Be the actual quantity of the display screen blue primary that is referenced, R _Ref1Be the demonstration numerical value of the display screen red primary that is referenced, G _Ref1Be the demonstration numerical value of the display screen green primary that is referenced, B _Ref1Be the demonstration numerical value of the display screen blue primary that is referenced, Φ _RBe the red primary display characteristic function that is referenced, Φ _GBe the green primary display characteristic function that is referenced, Φ _BBe the blue primary display characteristic function that is referenced.The primary colours drive characteristic that need carry out the display screen of chrominance space conversion is:

$\left\{\begin{array}{c}{\mathrm{RL}}_{\mathrm{ref}2}={\mathrm{\Ψ}}_R\left(R_{\mathrm{ref}2}\right)\\ {\mathrm{GL}}_{\mathrm{ref}2}={\mathrm{\Ψ}}_G\left(G_{\mathrm{ref}2}\right)\\ {\mathrm{BL}}_{\mathrm{ref}2}={\mathrm{\Ψ}}_B\left(B_{\mathrm{ref}2}\right)\end{array}\right.---\left(8\right)$

RL wherein _Ref2Be the actual quantity of the display screen red primary that carries out chrominance space conversion, GL _Ref2Be the actual quantity of the display screen green primary that carries out chrominance space conversion, BL _Ref2Be the actual quantity of the display screen blue primary that carries out chrominance space conversion, R _Ref2Be the demonstration numerical value of the display screen red primary that carries out chrominance space conversion, G _Ref2Be the demonstration numerical value of the display screen green primary that carries out chrominance space conversion, B _Ref2Be the demonstration numerical value of the display screen blue primary that carries out chrominance space conversion, ψ _RFor the red primary that carries out the chrominance space conversion drives display characteristic function, ψ _GFor the green primary that carries out the chrominance space conversion drives display characteristic function, ψ _BFor the blue primary that carries out the chrominance space conversion drives the display characteristic function.

To the display screen of reference and the display screen that carries out the chrominance space conversion by national standard, utilize the normalized optical measuring instrument to measure and obtain its primary colours chromaticity coordinate parameter x separately _Rref1, y _Rref1, z _Rref1, x _Gref1, y _Gref1, z _Gref1, x _Bref1, y _Bref1, z _Bref1And x _Rref2, y _Rref2, z _Rref2, x _Gref2, y _Gref2, z _Gref2, x _Bref2, y _Bref2, z _Bref2The basis on, according to the values (X of white of the matching principle of equal-energy white field and calibration _w, Y _w, Z _w), can determine the display screen of reference and the allocation of parameters C of the display screen that carries out the chrominance space conversion _Rref1, C _Gref1, C _Bref1And C _Rref2, C _Gref2, C _Bref2According to formula (3) and formula (4), the display screen of current reference can be expressed as with the chrominance space of the display screen that carries out the chrominance space conversion again:

$\left\{\begin{array}{c}X=C_{\mathrm{rref}1}{x}_{\mathrm{rref}1}{\mathrm{RL}}_{\mathrm{ref}1}+C_{\mathrm{gref}1}{x}_{\mathrm{gref}1}{\mathrm{GL}}_{\mathrm{ref}1}+C_{\mathrm{bref}1}{x}_{\mathrm{bref}1}{\mathrm{BL}}_{\mathrm{ref}1}\\ Y=C_{\mathrm{rref}1}{y}_{\mathrm{rref}1}{\mathrm{RL}}_{\mathrm{ref}1}+C_{\mathrm{gref}1}{y}_{\mathrm{gref}1}{\mathrm{GL}}_{\mathrm{ref}1}+C_{\mathrm{bref}1}{y}_{\mathrm{bref}1}{\mathrm{BL}}_{\mathrm{ref}1}\\ Z=C_{\mathrm{rref}1}{z}_{\mathrm{rref}1}{\mathrm{RL}}_{\mathrm{ref}1}+C_{\mathrm{gref}1}{z}_{\mathrm{gref}1}{\mathrm{GL}}_{\mathrm{ref}1}+C_{\mathrm{bref}1}{z}_{\mathrm{bref}1}{\mathrm{BL}}_{\mathrm{ref}1}\end{array}\right.$

$\left\{\begin{array}{c}X=C_{\mathrm{rref}2}{x}_{\mathrm{rref}2}{\mathrm{RL}}_{\mathrm{ref}2}+C_{\mathrm{gref}2}{x}_{\mathrm{gref}2}{\mathrm{GL}}_{\mathrm{ref}2}+C_{\mathrm{bref}2}{x}_{\mathrm{bref}2}{\mathrm{BL}}_{\mathrm{ref}2}\\ Y=C_{\mathrm{rref}2}{y}_{\mathrm{rref}2}{\mathrm{RL}}_{\mathrm{ref}2}+C_{\mathrm{gref}2}{y}_{\mathrm{gref}2}{\mathrm{GL}}_{\mathrm{ref}2}+C_{\mathrm{bref}2}{y}_{\mathrm{bref}2}{\mathrm{BL}}_{\mathrm{ref}2}\\ Z=C_{\mathrm{rref}2}{z}_{\mathrm{rref}2}{\mathrm{RL}}_{\mathrm{ref}2}+C_{\mathrm{gref}2}{z}_{\mathrm{gref}2}{\mathrm{GL}}_{\mathrm{ref}2}+C_{\mathrm{bref}2}{z}_{\mathrm{bref}2}{\mathrm{BL}}_{\mathrm{ref}2}\end{array}\right.$

Can obtain:

$\left\{\begin{array}{c}{R}_{\mathrm{ref}2}={{\mathrm{\Ψ}}_R}^{-1}[{C_{\mathrm{ref}2-\mathrm{ref}1}}^{\mathrm{rr}}{\mathrm{\Φ}}_R\left(R_{\mathrm{ref}1}\right)+{C_{\mathrm{ref}2-\mathrm{ref}1}}^{\mathrm{rg}}{\mathrm{\Φ}}_G\left(G_{\mathrm{ref}1}\right)+{C_{\mathrm{ref}2-\mathrm{ref}1}}^{\mathrm{rb}}{\mathrm{\Φ}}_B\left(B_{\mathrm{ref}1}\right)]\\ G_{\mathrm{ref}2}={{\mathrm{\Ψ}}_G}^{-1}[{C_{\mathrm{ref}2-\mathrm{ref}1}}^{\mathrm{gr}}{\mathrm{\Φ}}_R\left(R_{\mathrm{ref}1}\right)+{C_{\mathrm{ref}2-\mathrm{ref}1}}^{\mathrm{gg}}{\mathrm{\Φ}}_G\left(G_{\mathrm{ref}1}\right)+{C_{\mathrm{ref}2-\mathrm{ref}1}}^{\mathrm{gb}}{\mathrm{\Φ}}_B\left(B_{\mathrm{ref}1}\right)]\\ B_{\mathrm{ref}2}={{\mathrm{\Ψ}}_B}^{-1}[{C_{\mathrm{ref}2-\mathrm{ref}1}}^{\mathrm{br}}{\mathrm{\Φ}}_R\left(R_{\mathrm{ref}1}\right)+{C_{\mathrm{ref}2-\mathrm{ref}1}}^{\mathrm{bg}}{\mathrm{\Φ}}_G\left(G_{\mathrm{ref}1}\right)+{C_{\mathrm{ref}2-\mathrm{ref}1}}^{\mathrm{bb}}{\mathrm{\Φ}}_B\left(B_{\mathrm{ref}1}\right)]\end{array}\right.---\left(9\right)$

Can release the aberration correction formula of chrominance space conversion between diverse same class of each primary colours display characteristic or the variety classes display screen according to formula (9).

The present invention is based on the principle of colorimetry and this chrominance space conversion aberration modification method, proposed to overcome with a kind of panel display screen because the panel display screen colourity that the difference of chrominance space characteristic of each display module (display element) and primary colours driving display characteristic causes and the effective ways of Luminance Distribution inequality.

Principle and above-mentioned inference by colorimetry can be known: the conversion of chrominance space between the display screen needs two necessary conditions: the primary colours chromaticity coordinate triangle that (1) need carry out the display screen of chrominance space conversion covers the primary colours chromaticity coordinate triangle of the display screen that is referenced fully; (2) according to the primary colours characteristic x of display screen separately _Rref1, y _Rref1, z _Rref1, x _Gref1, y _Gref, z _Gref1, x _Bref1, y _Bref1, z _Bref1And x _Rref2, y _Rref2, z _Rref2, x _Gref2, y _Gref2, z _Gref2, x _Bref2, y _Bref2, z _Bref2Each display screen all has definite chrominance space parameter: C _Rref1, C _Gref1, C _Bref1, and C _Rref2, C _Gref2, C _Bref2Guarantee its balance of white.Because the chrominance space conversion is carried out between two systems, therefore need not guarantee the in full accord of absolute brightness, as long as satisfy relative scale.

Therefore, above-mentioned inference can't realize that panel display screen is owing to the chrominance space characteristic of each display module (display element) and primary colours drive the panel display screen colourity that the difference of display characteristic causes and the correction of Luminance Distribution inequality.At the chrominance space characteristic of each display module of panel display screen (display element) and the difference of primary colours driving display characteristic, the present invention treats each display module (display element) as the display screen of the definite chrominance space parameter of independent nothing, utilize the benchmark chrominance space of setting to come the brightness and the chrominance space of whole panel display screen are revised; According to measurement result, the primary colours characteristic x of each display element within each display module of panel display screen (being included in each display element) _r, y _r, z _r, x _g, y _g, z _g, x _b, y _b, z _bDifference less (or not having difference); Under identical drive condition, can determine the brightness relationship of each primary colours of each display module (display element); Therefrom determine the brightness number L of each primary colours minimum of each display module (display element) _Rmin, L _GminAnd L _BminAs benchmark luminance primary numerical value, determine the primary colours characteristic x of each primary colours chromaticity coordinate triangle smallest coverage of each display module (display element) simultaneously _Rmin, y _Rmin, z _Rmin, x _Gmin, y _Gmin, z _Gmin, x _Bmin, y _Bmin, b _MinAs benchmark primary colours characteristic, the benchmark colourity space representation of She Dinging is like this:

$\left\{\begin{array}{c}X=C_{r\min }{x}_{r\min }{\mathrm{RL}}_{\mathrm{ref}}+C_{g\min }{x}_{g\min }{\mathrm{GL}}_{\mathrm{ref}}+C_{b\min }{x}_{b\min }{\mathrm{BL}}_{\mathrm{ref}}\\ Y=C_{r\min }{y}_{r\min }{\mathrm{RL}}_{\mathrm{ref}}+C_{g\min }{y}_{g\min }{\mathrm{GL}}_{\mathrm{ref}}+C_{b\min }{y}_{b\min }{\mathrm{BL}}_{\mathrm{ref}}\\ Z=C_{r\min }{z}_{r\min }{\mathrm{RL}}_{\mathrm{ref}}+C_{g\min }{z}_{g\min }{\mathrm{GL}}_{\mathrm{ref}}+C_{b\min }{z}_{b\min }{\mathrm{BL}}_{\mathrm{ref}}\end{array}\right.---\left(10\right)$

C in the formula _Rmin, C _Gmin, C _BminFor benchmark colourity spatial parameter and be used for guaranteeing the balance of white of benchmark chrominance space.Because the benchmark primary colours of benchmark chrominance space all are selected from each concrete display module (display element), therefore can determine the explicit function characteristic of each primary colours of benchmark chrominance space:

$\left\{\begin{array}{c}{\mathrm{RL}}_{\min }={\mathrm{\Φ}}_{R\min }\left(R\right)\\ {\mathrm{GL}}_{\min }={\mathrm{\Φ}}_{G\min }\left(G\right)\\ {\mathrm{BL}}_{\min }={\mathrm{\Φ}}_{B\min }\left(B\right)\end{array}\right.$

Among the present invention, because there be not (a few cases may exist in the concrete display module (display element)) in the concrete display module (display element) in the benchmark chrominance space as a standard, thereby for display module (display element), it can not constitute a chrominance space that definite white field balance is arranged, and promptly there is not the chrominance space parameter that can guarantee white field balance in it.The present invention is for this relation of correct description, according to the brightness number L of each primary colours minimum of determining _Rmin, L _GminAnd L _Bmin, for any one concrete display module (display element) at random, the brightness number of its each primary colours can be expressed as:

$\left\{\begin{array}{c}{L}_{\mathrm{rrnd}}={l_R}^{\′}{L}_{r\min }({l_R}^{\′}\≥1)\\ L_{\mathrm{grnd}}={l_G}^{\′}{L}_{g\min }({l_G}^{\′}\≥1)\\ L_{\mathrm{brnd}}={l_B}^{\′}{L}_{b\min }({l_B}^{\′}\≥1)\end{array}\right.---\left(11\right)$

L wherein _RrndBe the high-high brightness of any one concrete display module red primary at random, L _GrndBe the high-high brightness of any one concrete display module green primary at random, L _BrndBe the high-high brightness of any one concrete display module blue primary at random, l _R' be that at random concrete display module red primary is with respect to the coefficient value of benchmark red primary brightness, l _G' be that at random concrete display module green primary is with respect to the coefficient value of benchmark green primary brightness, l _B' be that at random concrete display module blue primary is with respect to the coefficient value of benchmark blue primary brightness.If the primary colours characteristic of concrete display module at random is x _Rrnd, y _Rrnd, z _Rrnd, x _Grnd, y _Grnd, z _Grnd, x _Brnd, y _Brnd, z _Hrnd, so, the present invention is expressed as according to the chrominance space with this module:

$\left\{\begin{array}{c}X=\frac{{l_R}^{\′}{C}_{r\min }{x}_{r\min }}{y_{\mathrm{rrnd}}}{x}_{\mathrm{rrnd}}{\mathrm{RL}}_{\mathrm{ref}}+\frac{{l_G}^{\′}{C}_{g\min }{y}_{g\min }}{y_{\mathrm{grnd}}}{x}_{\mathrm{grnd}}{\mathrm{GL}}_{\mathrm{ref}}+\frac{{l_B}^{\′}{C}_{b\min }{y}_{b\min }}{y_{\mathrm{brnd}}}{x}_{\mathrm{brnd}}{\mathrm{BL}}_{\mathrm{ref}}\\ Y=\frac{{l_R}^{\′}{C}_{r\min }{x}_{r\min }}{y_{\mathrm{rrnd}}}{y}_{\mathrm{rrnd}}{\mathrm{RL}}_{\mathrm{ref}}+\frac{{l_G}^{\′}{C}_{g\min }{y}_{g\min }}{y_{\mathrm{grnd}}}{y}_{\mathrm{grnd}}{\mathrm{GL}}_{\mathrm{ref}}+\frac{{l_B}^{\′}{C}_{b\min }{y}_{b\min }}{y_{\mathrm{brnd}}}{y}_{\mathrm{brnd}}{\mathrm{BL}}_{\mathrm{ref}}\\ Z=\frac{{l_R}^{\′}{C}_{r\min }{x}_{r\min }}{y_{\mathrm{rrnd}}}{z}_{\mathrm{rrnd}}{\mathrm{RL}}_{\mathrm{ref}}+\frac{{l_G}^{\′}{C}_{g\min }{y}_{g\min }}{y_{\mathrm{grnd}}}{z}_{\mathrm{grnd}}{\mathrm{GL}}_{\mathrm{ref}}+\frac{{l_B}^{\′}{C}_{b\min }{y}_{b\min }}{y_{\mathrm{brnd}}}{z}_{\mathrm{brnd}}{\mathrm{BL}}_{\mathrm{ref}}\end{array}\right.---\left(12\right)$

Can obtain at random concrete display module like this to the corresponding conversion coefficient of benchmark chrominance space.First group of corresponding conversion coefficient of concrete display module at random has C _Rnd-min ^Rr, C _Rnd-min ^RgAnd C _Rnd-min ^RB, its expression formula is as follows

$\left\{\begin{array}{c}{C_{\mathrm{rnd}-\min }}^{\mathrm{rr}}=\frac{C_{r\min }{y}_{\mathrm{rrnd}}\left|\begin{array}{ccc}{x}_{r\min }& x_{\mathrm{grnd}}& x_{\mathrm{brnd}}\\ y_{r\min }& y_{\mathrm{grnd}}& y_{\mathrm{brnd}}\\ z_{r\min }& z_{\mathrm{grnd}}& z_{\mathrm{brnd}}\end{array}\right|}{{l_R}^{\′}{C}_{r\min }{y}_{r\min }\left|\begin{array}{ccc}{x}_{\mathrm{rrnd}}& x_{\mathrm{grnd}}& x_{\mathrm{brnd}}\\ y_{\mathrm{rrnd}}& y_{\mathrm{grnd}}& y_{\mathrm{brnd}}\\ z_{\mathrm{rrnd}}& z_{\mathrm{grnd}}& z_{\mathrm{brnd}}\end{array}\right|}\\ {C_{\mathrm{rnd}-\min }}^{\mathrm{rg}}=\frac{C_{g\min }{y}_{\mathrm{rrnd}}\left|\begin{array}{ccc}{x}_{g\min }& x_{\mathrm{grnd}}& x_{\mathrm{brnd}}\\ y_{g\min }& y_{\mathrm{grnd}}& y_{\mathrm{brnd}}\\ z_{g\min }& z_{\mathrm{grnd}}& z_{\mathrm{brnd}}\end{array}\right|}{{l_R}^{\′}{C}_{r\min }{y}_{r\min }\left|\begin{array}{ccc}{x}_{\mathrm{rrnd}}& x_{\mathrm{grnd}}& x_{\mathrm{brnd}}\\ y_{\mathrm{rrnd}}& y_{\mathrm{grnd}}& y_{\mathrm{brnd}}\\ z_{\mathrm{rrnd}}& z_{\mathrm{grnd}}& z_{\mathrm{brnd}}\end{array}\right|}\\ {C_{\mathrm{rnd}-\min }}^{\mathrm{rb}}=\frac{C_{b\min }{y}_{\mathrm{rrnd}}\left|\begin{array}{ccc}{x}_{b\min }& x_{\mathrm{grnd}}& x_{\mathrm{brnd}}\\ y_{b\min }& y_{\mathrm{grnd}}& y_{\mathrm{brnd}}\\ z_{b\min }& z_{\mathrm{grnd}}& z_{\mathrm{brnd}}\end{array}\right|}{{l_R}^{\′}{C}_{r\min }{y}_{r\min }\left|\begin{array}{ccc}{x}_{\mathrm{rrnd}}& x_{\mathrm{grnd}}& x_{\mathrm{brnd}}\\ y_{\mathrm{rrnd}}& y_{\mathrm{grnd}}& y_{\mathrm{brnd}}\\ z_{\mathrm{rrnd}}& z_{\mathrm{grnd}}& z_{\mathrm{brnd}}\end{array}\right|}\end{array}\right.---\left(13\right)$

Equally, can obtain C _Rnd-min ^Gr, C _Rnd-min ^Gg, C _Rnd-min ^Gb, C _Rnd-min ^Br, C _Rnd-min ^Bg, C _Rnd-min ^BbConcrete outcome, concrete display module has so at random just formed the corresponding conversion coefficient of benchmark chrominance space.Equally, obtain it respectively to the corresponding conversion coefficient of benchmark chrominance space, form the corresponding conversion coefficient table of a corresponding disparate modules at different display modules.

Simultaneously, determine concrete display module primary colours drive characteristic at different display modules;

$\left\{\begin{array}{c}{\mathrm{RL}}_{\mathrm{rnd}}={\mathrm{\Ψ}}_{\mathrm{Rrnd}}\left(R\right)\\ {\mathrm{GL}}_{\mathrm{rnd}}={\mathrm{\Ψ}}_{\mathrm{Grnd}}\left(G\right)\\ {\mathrm{BL}}_{\mathrm{rnd}}={\mathrm{\Ψ}}_{\mathrm{Brnd}}\left(B\right)\end{array}\right.$

Control logic can be carried out corresponding chrominance space correction to the data that are used for different display modules in real time, makes entire display screen all be consistent in colourity and brightness; Reached and overcome with a kind of panel display screen owing to the chrominance space characteristic of each display module (display element) and primary colours drive the panel display screen colourity that the difference of display characteristic causes and the purpose of Luminance Distribution inequality.

The following characteristics of the present invention:

1, adopt corresponding conversion to revise, having overcome background technology is the bigger shortcoming of chrominance space conversion colourity error between the nonlinear display screen at primary colours explicit function characteristic.

2,, solved the problem of chrominance space conversion between the diverse display screen of primary colours explicit function characteristic at the concrete property correction of each primary colours.

3, introduce the benchmark colourity space criteria of supposition, be used for weighing the actual chrominance space difference of the different display modules of same display screen (display element).

4, a concrete display module (display element) is considered as do not determine the chrominance space of white field balance, and obtains this space representation equation.

5, obtain it respectively to the corresponding conversion coefficient of benchmark chrominance space at different display modules, form the corresponding conversion coefficient table of a corresponding disparate modules.

6, can revise corresponding display module (display element) according to this accurate conversion coefficient table, on entire display screen, set up unified benchmark chrominance space, reach the purpose of whole-screen brightness, colourity unification.

Technical scheme of the present invention has overcome background technology, and to drive display characteristic at primary colours be that chrominance space conversion and primary colours drive the big and brightness appearance of the colourity error of chrominance space conversion between the diverse variety classes display screen of display characteristic than shortcomings such as large deviations between the nonlinear same class display screen, improves visual display quality greatly; Simultaneously, on accurate based measurement, introduced the benchmark colourity space criteria of supposition, the display module that each is concrete (display element) is considered as not determining the chrominance space of white field balance, and obtain it respectively to the corresponding conversion coefficient of benchmark chrominance space at different display modules, form the corresponding conversion coefficient table of a corresponding disparate modules.The panel display screen colourity that the difference that drives display characteristic owing to the chrominance space characteristic and primary colours of each display module (display element) with a kind of panel display screen causes and the effective ways of Luminance Distribution inequality have been proposed to overcome, solve the full screen brightness of panel display screen, the problem of colourity unification, guaranteed the demonstration of high-quality video image.The invention provides a kind of panel display screen chroma space modification method.

Description of drawings:

Fig. 1 is the simplified schematic diagram of background technology chrominance space conversion work process

Fig. 2 is the simplified schematic diagram of the chrominance space conversion work process of the embodiment of the invention 1

Fig. 3 is panel display screen full screen brightness, the colourity unification course of work simplified schematic diagram of utilizing the chrominance space correction to finish of the embodiment of the invention 2

Embodiment:

Embodiment 1: the simplified schematic diagram of the chrominance space conversion work process of the embodiment of the invention 1 as shown in Figure 2:

By red primary input recording controller 1, green primary input recording controller 2, blue primary input recording controller 3, control logic 4, conversion coefficient C _Ref2-ref1 ^RrMemory 5, conversion coefficient C _{Ref2 Ref1} ^BgMemory 6, conversion coefficient C _Ref2-ref1 ^RbMemory 7, conversion coefficient C _Ref2-ref1 ^GrMemory 8, conversion coefficient C _Ref2-ref1 ^GgMemory 9, conversion coefficient C _Ref2-ref1 ^GbMemory 10, conversion coefficient C _Ref2-ref1 ^BrMemory 11, conversion coefficient C _Ref2-ref1 ^BgMemory 12, conversion coefficient C _Ref2-ref1 ^BbMemory 13, red primary operational multiplier 14,15,16, green primary operational multiplier 17,18,19, blue primary operational multiplier 20,21,22, red primary computing adder 23, green primary computing adder 24, blue primary computing adder 25, red primary dateout 26, green primary dateout 27, blue primary dateout 28, the red primary explicit function converter 29 of reference system, the green primary explicit function converter 30 of reference system, the red primary explicit function converter 31 of reference system, the red primary drive characteristic inverse converter 32 of converting system, the green primary drive characteristic inverse converter 33 of converting system, the blue primary drive characteristic inverse converter 34 of converting system is formed.

Produce the basic clock signal of control circuit by control logic 4; Red primary input recording controller 1, green primary input recording controller 2, blue primary input recording controller 3 each primary colours of storage are in this real time data constantly; The corresponding primary colours conversion coefficient of conversion coefficient memory 5,6,7,8,9,10,11,12,13 storages; Red primary operational multiplier 14,15,16 is used for finishing the coefficient computing of red primary; Green primary operational multiplier 17,18,19 is used for finishing the coefficient computing of green primary; Blue primary operational multiplier 20,21,22 is used for finishing the coefficient computing of blue primary; Red primary computing adder 23 is used for forming final red primary actual number value; Green primary computing adder 24 is used for forming final green primary actual number value; Blue primary computing adder 25 is used for forming final blue primary actual number value; The red primary explicit function converter 29 of reference system is used for forming the actual number value of the red primary of reference system; The green primary explicit function converter 30 of reference system is used for forming the actual number value of the green primary of reference system; The blue primary explicit function converter 31 of reference system is used for forming the actual number value of the blue primary of reference system; The red primary drive characteristic inverse converter 32 of converting system is used for forming final red primary dateout 26; The green primary drive characteristic inverse converter 33 of converting system is used for forming final green primary dateout 27; The blue primary drive characteristic inverse converter 34 of converting system is used for forming final blue primary dateout 28.

Being directed to primary colours, to drive display characteristic be that chrominance space conversion and primary colours drive chrominance space conversion between the diverse variety classes display screen of display characteristic between the nonlinear same class display screen, control logic 4 produces data strobe signal and sends red primary input recording controller 1 to by control line a at each display element in the cycle, green primary input recording controller 2, blue primary input recording controller 3, make red primary input data input to the red primary explicit function converter 29 of reference system by data wire e, green primary input data input to the green primary explicit function converter 30 of reference system by data wire f, blue primary input data input to the blue primary explicit function converter 31 of reference system by data wire g, control logic 4 is by the red primary explicit function converter 29 of control line s control reference system, 31 pairs of data separately of blue primary explicit function converter of the green primary explicit function converter 30 of reference system and reference system are carried out conversion, make the red primary transform data input to red primary operational multiplier 14 by data wire u, green primary operational multiplier 17, blue primary operational multiplier 20, the green primary transform data inputs to red primary operational multiplier 15 by data wire v, green primary operational multiplier 18, blue primary operational multiplier 21, the blue primary transform data inputs to red primary operational multiplier 17 by data wire w, green primary operational multiplier 19, blue primary operational multiplier 22, meanwhile, produce the coefficient gating signal and send conversion coefficient memory 5 to by address wire b, 6,7,8,9,10,11,12,13, make corresponding coefficient by data wire h, i, j, k, l, m, n, p, q sends red primary operational multiplier 14 to, 15,16, green primary operational multiplier 17,18,19, blue primary operational multiplier 20,21,22. control logic 4 produces the computing signal and sends red primary operational multiplier 14 to by control line c then, 15,16, green primary operational multiplier 17,18,19, blue primary operational multiplier 20,21,22; The intermediate object program that produces is sent into red primary computing adder 23, green primary computing adder 24 and blue primary computing adder 25. under the control signal effect that control logic 4 is transmitted by control line d by data wire r1, r2, r3, g1, g2, g3, b1, b2, b3, and red primary computing adder 23, green primary computing adder 24 and blue primary computing adder 25 produce the operation result of each primary colours actual quantity of converting system; Operation result is sent into the red primary drive characteristic inverse converter 32 of converting system respectively, the green primary drive characteristic inverse converter 33 of converting system and the blue primary drive characteristic inverse converter 34 of converting system; Under the control signal effect that control logic 4 is transmitted by control line y, red primary drive characteristic inverse converter 32, green primary drive characteristic inverse converter 33 and blue primary drive characteristic inverse converter 34 produce final operation result. proceed aforesaid operations in the next display element cycle, until the conversion of finishing the whole whole pixel datas of video image; Carry out same operation at next video image, down the aberration of two display screens is effectively eliminated in certain condition (the primary colours chromaticity coordinate triangle that carries out the display screen of chrominance space conversion covers the primary colours chromaticity coordinate triangle of the display screen that is referenced fully). in this embodiment, the implementation of each primary colours explicit function converter can be finished by real-time operation or look-up method, the primary colours drive characteristic inverse converter of each primary colours also can be finished by real-time operation or look-up method, primary colours explicit function converter, primary colours drive characteristic inverse converter even whole transformation system all can be integrated in the large scale integrated circuit.

Embodiment 2: the embodiment of the invention 2 is panel display screen full screen brightness, the colourity unifications that utilize the chrominance space correction to finish.

Its course of work signal letter is imported recording controller 3, control logic 4, current display module (display element) to the corresponding conversion coefficient C of benchmark chrominance space by red primary input recording controller 1, green primary input recording controller 2, blue primary as shown in Figure 3 _Rnd-min ^RrMemory 5, current display module (display element) are to the corresponding conversion coefficient C of benchmark chrominance space _Rnd-min ^RgMemory 6, current display module (display element) are to the corresponding conversion coefficient C of benchmark chrominance space _Rnd-min ^RbMemory 7, current display module (display element) are to the corresponding conversion coefficient C of benchmark chrominance space _Rnd-min ^GrMemory 8, current display module (display element) are to the corresponding conversion coefficient C of benchmark chrominance space _Rnd-min ^GgMemory 9, current display module (display element) are to the corresponding conversion coefficient C of benchmark chrominance space _Rnd-min ^GbMemory 10, current display module (display element) are to the corresponding conversion coefficient C of benchmark chrominance space _Rnb-min ^BrMemory 11, current display module (display element) are to the corresponding conversion coefficient C of benchmark chrominance space _Rnd-min ^BgMemory 12, current display module (display element) are to the corresponding conversion coefficient C of benchmark chrominance space _Rnd-min ^BbMemory 13, red primary operational multiplier 14,15,16, green primary operational multiplier 17,18,19, blue primary operational multiplier 20,21,22, red primary computing adder 23, green primary computing adder 24, blue primary computing adder 25, red primary dateout 26, green primary dateout 27, blue primary dateout 28, the red primary explicit function converter 29 of benchmark chrominance space, the green primary explicit function converter 30 of benchmark chrominance space, the red primary explicit function converter 31 of benchmark chrominance space, the red primary drive characteristic inverse converter 32 of current display module (display element), the green primary drive characteristic inverse converter 33 of current display module (display element), the blue primary drive characteristic inverse converter 34 of current display module (display element), each display module (display element) is to the corresponding conversion coefficient C of benchmark chrominance space _Rnd-min ^RrTable 35, each display module (display element) is to the corresponding conversion coefficient C of benchmark chrominance space _Rnd-min ^RgTable 36, each display module (display element) is to the corresponding conversion coefficient C of benchmark chrominance space _Rnd-min ^RbTable 37, each display module (display element) is to the corresponding conversion coefficient C of benchmark chrominance space _Rnd-min ^GrTable 38, each display module (display element) is to the corresponding conversion coefficient C of benchmark chrominance space _Rnd-min ^GgTable 39, each display module (display element) is to the corresponding conversion coefficient C of benchmark chrominance space _Rnd-min ^GbTable 40, each display module (display element) is to the corresponding conversion coefficient C of benchmark chrominance space _Rnd-min ^BrTable 41, each display module (display element) is to the corresponding conversion coefficient C of benchmark chrominance space _Rnd-min ^BgTable 42, each display module (display element) is to the corresponding conversion coefficient C of benchmark chrominance space _Rnd-min ^BbTable 43 is formed, and is produced the basic clock signal of control circuit by control logic 4; Red primary input recording controller 1, green primary input recording controller 2, blue primary input recording controller 3 each primary colours of storage are in this real time data constantly; The corresponding primary colours conversion coefficient of conversion coefficient memory 5,6,7,8,9,10,11,12,13 storages; Red primary operational multiplier 14,15,16 is used for finishing the coefficient computing of red primary; Green primary operational multiplier 17,18,19 is used for finishing the coefficient computing of green primary; Blue primary operational multiplier 20,21,22 is used for finishing the coefficient computing of blue primary; Red primary computing adder 23 is used for forming final red primary actual number value; Green primary computing adder 24 is used for forming final green primary actual number value; Blue primary computing adder 25 is used for forming final blue primary actual number value; The red primary explicit function converter 29 of benchmark chrominance space is used for forming the actual number value of the red primary of reference system; The green primary explicit function converter 30 of benchmark chrominance space is used for forming the actual number value of the green primary of reference system; The blue primary explicit function converter 31 of benchmark chrominance space is used for forming the actual number value of the blue primary of reference system; The red primary drive characteristic inverse converter 32 of current display module (display element) is used for forming final red primary dateout 26; The green primary drive characteristic inverse converter 33 of current display module (display element) is used for forming final green primary dateout 27; The blue primary drive characteristic inverse converter 34 of current display module (display element) is used for forming final blue primary dateout 28.

Be directed to the panel display screen colourity that causes owing to the difference of the chrominance space characteristic of each display module (display element) and primary colours explicit function characteristic with a kind of panel display screen and the colourity of Luminance Distribution inequality, the brightness unification is proofreaied and correct, its course of work is: control logic 4 produces data strobe signal and sends red primary input recording controller 1 to by control line a at each display element in the cycle, green primary input recording controller 2, blue primary input recording controller 3, make red primary input data input to the red primary explicit function converter 29 of benchmark chrominance space by data wire e, green primary input data input to the green primary explicit function converter 30 of benchmark chrominance space by data wire f, blue primary input data input to the blue primary explicit function converter 31 of benchmark chrominance space by data wire g, control logic 4 is by the red primary explicit function converter 29 of control line s control benchmark chrominance space, 31 pairs of data separately of blue primary explicit function converter of the green primary explicit function converter 30 of benchmark chrominance space and benchmark chrominance space are carried out conversion, make the red primary transform data input to red primary operational multiplier 14 by data wire u, green primary operational multiplier 17, blue primary operational multiplier 20, the green primary transform data inputs to red primary operational multiplier 15 by data wire v, green primary operational multiplier 18, blue primary operational multiplier 21, the blue primary transform data inputs to red primary operational multiplier 17 by data wire w, green primary operational multiplier 19, blue primary operational multiplier 22, meanwhile, produce current display module (display element) coefficient gating signal and send each display module (display element) to the corresponding transformation series numerical table 35 of benchmark chrominance space by address wire b, 36,37,38,39,40,41,42,43, and by data wire h1, i1, j1, k1, l1, m1, n1, p1, q1 sends the corresponding conversion coefficient of current display module (display element) to conversion coefficient memory 5,6,7,8,9,10,11,12,13, make corresponding coefficient by data wire h, i, j, k, l, m, n, p, q sends red primary operational multiplier 14 to, 15,16, green primary operational multiplier 17,18,19, blue primary operational multiplier 20,21,22. control logic 4 produces the computing signal and sends red primary operational multiplier 14 to by control line c then, 15,16, green primary operational multiplier 17,18,19, blue primary operational multiplier 20,21,22; The intermediate object program that produces is sent into red primary computing adder 23, green primary computing adder 24 and blue primary computing adder 25. under the control signal effect that control logic 4 is transmitted by control line d by data wire r1, r2, r3, g1, g2, g3, b1, b2, b3, and red primary computing adder 23, green primary computing adder 24 and blue primary computing adder 25 produce the operation result of each primary colours actual quantity of current display module (display element); Operation result is sent into the red primary drive characteristic inverse converter 32 of current display module (display element) respectively, the green primary drive characteristic inverse converter 33 of current display module (display element) and the blue primary drive characteristic inverse converter 34 of current display module (display element); Under the control signal effect that control logic 4 is transmitted by control line y, red primary drive characteristic inverse converter 32, green primary drive characteristic inverse converter 33 and blue primary drive characteristic inverse converter 34 produce final operation result. proceed aforesaid operations in the next display element cycle, until the conversion of finishing the whole whole pixel datas of video image; Carry out same operation at next video image, finished the full screen brightness of panel display screen, the correction of colourity unification, guaranteed the demonstration of high-quality video image. in this embodiment, the implementation of each primary colours explicit function converter can be finished by real-time operation or look-up method, the primary colours drive characteristic inverse converter of each primary colours also can be finished by real-time operation or look-up method, and be directed to the different primary colours drive characteristic of current display module (display element), primary colours drive characteristic inverse converter can be adjusted accordingly, primary colours explicit function converter, primary colours drive characteristic inverse converter even whole transformation system all can be integrated in the large scale integrated circuit.

Except the foregoing description, according to the use needs and the actual conditions of panel display screen, this chroma space modification method also can adopt other compound mode, according to the present invention program still can different chrominance spaces correction; Primary colours drive characteristic inverse converter adopts any function all in category of the present invention; The related side that the present invention program can be applied in flat panel display to.

Claims (8)

1. panel display screen chroma space modification method, implementation step is as follows:

(1) the primary colours explicit function characteristic of determining the chroma space reference system is:

$\left\{\begin{array}{c}{\mathrm{RL}}_{\mathrm{ref}1}={\mathrm{\Φ}}_R\left(R_{\mathrm{ref}1}\right)\\ {\mathrm{GL}}_{\mathrm{ref}1}={\mathrm{\Φ}}_G\left(G_{\mathrm{ref}1}\right)\\ {\mathrm{BL}}_{\mathrm{ref}1}={\mathrm{\Φ}}_B\left(B_{\mathrm{ref}1}\right)\end{array}\right.$

(2) determine the chrominance space parameter of chroma space reference system;

(3) the definite primary colours drive characteristic that need carry out the display screen of chrominance space conversion:

$\left\{\begin{array}{c}{\mathrm{RL}}_{\mathrm{ref}2}={\mathrm{\Ψ}}_R\left(R_{\mathrm{ref}2}\right)\\ {\mathrm{GL}}_{\mathrm{ref}2}={\mathrm{\Ψ}}_G\left(G_{\mathrm{ref}2}\right)\\ {\mathrm{BL}}_{\mathrm{ref}2}={\mathrm{\Ψ}}_B\left(B_{\mathrm{ref}2}\right)\end{array}\right.$

(4) the definite chrominance space parameter that need carry out the display screen of chrominance space conversion;

(5) the chrominance space parameter by above-mentioned reference system and converting system forms conversion coefficient;

(6) deposit above-mentioned conversion coefficient in the conversion coefficient memory;

(7) video data carries out computing by the chrominance space conversion array then by the primary colours explicit function converter of reference system under control logic control;

(8), finish primary colours explicit function characteristic and be chrominance space conversion between the chrominance space conversion and the diverse variety classes display screen of primary colours explicit function characteristic between the nonlinear same class display screen according to the chrominance space translation data of above-mentioned steps (7) computing primary colours drive characteristic inverse converter by converting system;

(9) at each primary colours minimum brightness numerical value and the primary colours chromaticity coordinate triangle smallest coverage of determining each display module with each display module chrominance space characteristic of a kind of panel display screen and primary colours explicit function property difference situation;

(10) set flat panel display screen reference colours degree space according to above-mentioned steps (9);

$\left\{\begin{array}{c}X=C_{r\min }{x}_{r\min }{\mathrm{RL}}_{\mathrm{ref}}+C_{g\min }{x}_{g\min }{\mathrm{GL}}_{\mathrm{ref}}+C_{b\min }{x}_{b\min }{\mathrm{BL}}_{\mathrm{ref}}\\ {Y=C}_{r\min }{y}_{r\min }{\mathrm{RL}}_{\mathrm{ref}}+C_{g\min }{y}_{g\min }{\mathrm{GL}}_{\mathrm{ref}}+C_{b\min }{y}_{b\min }{\mathrm{BL}}_{\mathrm{ref}}\\ Z=C_{r\min }{z}_{r\min }{\mathrm{RL}}_{\mathrm{ref}}+C_{g\min }{z}_{g\min }{\mathrm{GL}}_{\mathrm{ref}}+C_{b\min }{z}_{b\min }{\mathrm{BL}}_{\mathrm{ref}}\end{array}\right.$

(11) the concrete display module that obtains at random according to above-mentioned steps (9) is C to the corresponding conversion coefficient of benchmark chrominance space _Rnd-min ^Rr, C _Rnd-min ^Rg, C _Rnd-min ^RB, C _Rnd-min ^Gr, C _Rnd-min ^Gg, C _Rnd-min ^Gb, C _Rnd-min ^Br, C _Rnd-min ^Bg, C _Rnd-min ^Bb

(12) determine benchmark chrominance space primary colours explicit function characteristic and concrete display module primary colours drive characteristic;

$\left\{\begin{array}{c}{\mathrm{RL}}_{\min }={\mathrm{\Φ}}_{R\min }\left(R\right)\\ {\mathrm{GL}}_{\min }={\mathrm{\Φ}}_{G\min }\left(G\right)\\ {\mathrm{BL}}_{\min }={\mathrm{\Φ}}_{B\min }\left(B\right)\end{array}\right.$ With $\left\{\begin{array}{c}{\mathrm{RL}}_{\mathrm{rnd}}={\mathrm{\Ψ}}_{\mathrm{Rrnd}}\left(R\right)\\ {\mathrm{GL}}_{\mathrm{rnd}}={\mathrm{\Ψ}}_{\mathrm{Grnd}}\left(G\right)\\ {\mathrm{BL}}_{\mathrm{rnd}}={\mathrm{\Ψ}}_{\mathrm{Brnd}}\left(B\right)\end{array}\right.$

(13) video data is imported concrete display module to the corresponding conversion coefficient of benchmark chrominance space simultaneously by the primary colours explicit function converter of benchmark chrominance space under control logic control, carries out computing by the chrominance space conversion array then;

(14) pass through this concrete display module primary colours drive characteristic inverse converter according to the chrominance space translation data of above-mentioned steps (11) computing, finish the colourity with a kind of panel display screen, the correction of brightness inconsistency.

2. a kind of panel display screen chroma space modification method according to claim 1 is characterized in that: the primary colours explicit function characteristic RL of chroma space reference system _Refl=Φ _R(R _Ref1), GL _Ref1=Φ _G(G _Ref1), BL _Ref1=Φ _B(B _Ref1) can be same class function between the three, also can be the inhomogeneity function.

3. a kind of panel display screen chroma space modification method according to claim 1 is characterized in that: the primary colours drive characteristic RL that need carry out the display screen of chrominance space conversion _Ref2=ψ _R(R _Ref2), GL _Ref2=ψ _G(G _Ref2), BL _Ref2=ψ _B(B _Ref2) can be same class function between the three, also can be the inhomogeneity function.

4. a kind of panel display screen chroma space modification method according to claim 1, it is characterized in that: the implementation of each primary colours explicit function converter can be finished by real-time operation or look-up method, and primary colours explicit function converter can be integrated in the large scale integrated circuit.

5. a kind of panel display screen chroma space modification method according to claim 1, it is characterized in that: the implementation of the primary colours drive characteristic inverse converter of each primary colours can be finished by real-time operation or look-up method, and be directed to the different primary colours drive characteristic of current display module, primary colours drive characteristic inverse converter can be adjusted accordingly, can be integrated in the large scale integrated circuit.

6. a kind of panel display screen chroma space modification method according to claim 1, it is characterized in that: each concrete display module is controlled each primary colours with respect to this display module under control logic control the corresponding conversion coefficient of benchmark chrominance space, can be integrated in the large scale integrated circuit.

7. a kind of panel display screen chroma space modification method according to claim 1 is characterized in that: control logic produces data strobe signal and sends red, green, blue primary colours input recording controller respectively at each display element in the cycle; Make red primary input data input to the red primary explicit function converter of reference system, green primary input data input to the green primary explicit function converter of reference system, and blue primary input data input to the blue primary explicit function converter of reference system; The red, green, blue primary colours explicit function converter of control logic control reference system carries out conversion to data separately: make the red primary transform data input to first group of red, green, blue primary colours operational multiplier; The green primary transform data inputs to second group of red, green, blue primary colours operational multiplier; The blue primary transform data inputs to the 3rd group of red, green, blue primary colours operational multiplier; Simultaneously, the gating signal that control logic produces the chroma space coefficient sends the conversion coefficient memory to, makes corresponding chroma space coefficient send above-mentioned three groups of red, green, blue primary colours operational multipliers to; Control logic produces the computing signal and sends above-mentioned three groups of red, green, blue primary colours operational multipliers to then, and the intermediate object program that above-mentioned three groups of red, green, blue primary colours operational multipliers produce is sent into corresponding red, green, blue primary colours computing adder respectively; Under the control signal effect that control logic transmits, red, green, blue primary colours computing adder produces the operation result of each primary colours actual quantity of converting system; Above-mentioned operation result is sent into the red, green, blue primary colours drive characteristic inverse converter of converting system respectively; Under the control signal effect of control logic, red, green, blue primary colours drive characteristic inverse converter produces final operation result; Proceed aforesaid operations in the next display element cycle, until the conversion of finishing the whole whole pixel datas of video image; Carry out above-mentioned same operation at next video image, the aberration of two display screens is effectively eliminated.

8. a kind of panel display screen chroma space modification method according to claim 1, it is characterized in that: control logic produces data strobe signal and sends to red respectively at each display element in the cycle, green, blue primary input recording controller, make red primary input data input to the red primary explicit function converter of benchmark chrominance space, green primary input data input to the green primary explicit function converter of benchmark chrominance space, blue primary input data input to the blue primary explicit function converter of benchmark chrominance space, control logic is controlled the red of benchmark chrominance space, green, blue primary explicit function converter carries out conversion to data separately, make the red primary transform data input to first group red, green, the blue primary operational multiplier, the green primary transform data input to second group red, green, the blue primary operational multiplier, the blue primary transform data input to the 3rd group red, green, the blue primary operational multiplier, meanwhile, produce current display module coefficient gating signal and send each display module to the corresponding transformation series numerical table of benchmark chrominance space, and send the corresponding conversion coefficient of current display module to the conversion coefficient memory, make corresponding coefficient send to above-mentioned three groups red, green, the blue primary operational multiplier; Then control logic produce the computing signal and send to and send to above-mentioned three groups red, green, the blue primary operational multiplier; The intermediate object program that produces is sent into corresponding red, green, blue primary colours computing adder respectively; Under the control signal effect of control logic, red, green, blue primary colours computing adder produces the operation result of each primary colours actual quantity of current display module; Above-mentioned operation result is sent into the red, green, blue primary colours drive characteristic inverse converter of current display module respectively; Under the control signal effect that control logic transmits, red, green, blue primary colours drive characteristic inverse converter produces final operation result; Proceed aforesaid operations in the next display element cycle, until the conversion of finishing the whole whole pixel datas of video image; Carry out same operation at next video image, finished the full screen brightness of panel display screen, the correction of colourity unification.