CN110223650A - The white balance parameter generation method and display device of four color pixels - Google Patents
The white balance parameter generation method and display device of four color pixels Download PDFInfo
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- G—PHYSICS
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- 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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
- G09G3/3607—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 by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
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- G—PHYSICS
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- 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
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
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- G—PHYSICS
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- 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
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
- G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
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- G09G2320/00—Control of display operating conditions
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Abstract
The invention discloses a kind of white balance parameter generation methods of four color pixels, the following steps are included: first obtaining the white balance target chromatic value after four color pixel colour mixtures, further according to the acquisition of default gamma value and the preset matched object brightness of brightness index change curve, the grayscale value mapping table for adjusting display panel white balance is finally obtained according to the object brightness of each grayscale after the aim colour angle value and the colour mixture.The invention also discloses a kind of display devices.So that display panel is reached the method for white balance the present invention provides a kind of efficiently and accurately, improves the display effect of display panel.
Description
Technical field
The present invention relates to liquid crystal technology fields, more particularly to a kind of the white balance parameter generation method and display of four color pixels
Device.
Background technique
When color information processing digit is 8bit, the drive for being driven to 0~255 grayscale of four color pixel liquid crystal display panels
It is dynamic, white, red, green, blue pixel color by multiple material in chromatic photoresist material and liquid crystal display panel absorption
Generate final color.
In general, the color of white pixel and the white signal color mixed not equal to red, green, blue pixel,
Therefore the performance of four color pixel colour mixtures is unable to maintain that the white balance conditions demand that display panel generally requires, wherein white balance item
Part is that 0~255 complete white field signal of grayscale has fixed chromatic value.Therefore industry is badly in need of a set of display for meeting four color pixels of design
The driving method of panel white balance conditions.
Summary of the invention
The main purpose of the present invention is to provide the white balance parameter generation method and display device of a kind of four color pixels, purports
The technical issues of the four color pixel colour mixtures for solving display panel are unable to satisfy white balance conditions, to improve the display of display panel
Effect.
To achieve the above object, the present invention provides a kind of white balance parameter generation method of four color pixels, four colour
Element white balance parameter generation method the following steps are included:
White balance target chromatic value after obtaining four color pixel colour mixtures, wherein four color pixel includes white pixel, red
Color pixel, green pixel and blue pixel；
It is obtained and the preset matched object brightness of brightness index change curve, the object brightness according to default gamma value
For the object brightness of each grayscale after four color pixel colour mixtures；
Grayscale value mapping table is obtained according to the object brightness of each grayscale after the aim colour angle value and the colour mixture, with
The white balance of display panel is adjusted according to the grayscale value mapping table, the grayscale mapping table includes the input grayscale of each pixel
With the mapping relations of output grayscale.
Optionally, the object brightness according to each grayscale after the aim colour angle value and the colour mixture obtains grayscale
The step of value mapping table includes:
The white is obtained according to the intrinsic brilliance of the object brightness of each grayscale of the white pixel and each grayscale
Pixel inputs grayscale and exports the first mapping relations of grayscale；
The green is obtained according to the intrinsic brilliance of the object brightness of each grayscale of the green pixel and each grayscale
Pixel inputs grayscale and exports the second mapping relations of grayscale；
Each ash after obtaining colour mixture according to the object brightness of each grayscale after the aim colour angle value and the colour mixture
The goal stimulus value of rank；
According to the goal stimulus value of each grayscale, first mapping relations and second mapping relations after the colour mixture
Obtain third mapping relations and the 4th mapping relations, wherein the third mapping relations be the red pixel input grayscale with
The mapping relations of grayscale are exported, the 4th mapping relations are that the blue pixel inputs grayscale and the mapping of output grayscale is closed
System；
Grayscale is obtained according to first mapping relations, the second mapping relations, third mapping relations and the 4th mapping relations
It is worth mapping table.
Optionally, the intrinsic brilliance of the object brightness and each grayscale of each grayscale according to the white pixel obtains
Before the step of to white pixel input grayscale and exporting the first mapping relations of grayscale further include:
Obtain the Y-coordinate spectrum stimulus value of the white pixel highest grayscale；
The target of each grayscale of the white pixel is obtained according to the Y-coordinate spectrum stimulus value and the default gamma value
Brightness.
Optionally, the intrinsic brilliance of the object brightness and each grayscale of each grayscale according to the white pixel obtains
Before the step of to white pixel input grayscale and exporting the first mapping relations of grayscale further include:
The white pixel unit of the display panel is driven to show with each input grayscale value；
It obtains the display panel and drives brightness value when showing in each grayscale value；
Using the brightness value as the intrinsic brilliance of each grayscale of the white pixel.
Optionally, the intrinsic brilliance of the object brightness and each grayscale of each grayscale according to the white pixel obtains
Before the step of to white pixel input grayscale and exporting the first mapping relations of grayscale further include:
Obtain the input signal of white pixel and the conversion factor of output signal in display panel；
The white is obtained according to the spectrum stimulus value of the conversion factor of the white pixel and white pixel highest grayscale
The intrinsic brilliance of each grayscale of pixel.
Optionally, the intrinsic brilliance of the object brightness and each grayscale of each grayscale according to the green pixel obtains
Before the step of to green pixel input grayscale and exporting the second mapping relations of grayscale further include:
Green pixel is obtained in the spectrum stimulus value of highest grayscale；
It is each that the green pixel is obtained according to the spectrum stimulus value of green pixel highest grayscale and the preset gamma value
The object brightness of a grayscale.
Optionally, the intrinsic brilliance of the object brightness and each grayscale of each grayscale according to the green pixel obtains
Before the step of to green pixel input grayscale and exporting the second mapping relations of grayscale further include:
The green pixel cell of the display panel is driven to show with each grayscale value；
It obtains the display panel and drives brightness value when showing in each grayscale value；
Using the brightness value as the intrinsic brilliance of each grayscale of the green pixel.
Optionally, the basis presets gamma value and obtains the step with the object brightness of predetermined luminance index variation Curve Matching
Suddenly include:
Obtain the spectrum stimulus value of the four color pixels highest grayscale；
It is obtained and preset brightness according to the spectrum stimulus value of the four color pixels highest grayscale and the default gamma value
The object brightness of index variation Curve Matching, wherein the object brightness is that the target of each grayscale after four color pixel colour mixtures is bright
Degree.
Optionally, described according to the goal stimulus value of each grayscale after the colour mixture, first mapping relations and described
Second mapping relations obtain the step of third mapping relations and four mapping relations and include:
Obtain the input signal of red pixel and the conversion factor of output signal in display panel；
Obtain the input signal of blue pixel and the conversion factor of output signal in display panel；
According to the goal stimulus value of each grayscale, the conversion factor of the red pixel, the blue picture after the colour mixture
Conversion factor, first mapping relations and second mapping relations of element obtain the third mapping relations and the described 4th
Mapping relations.
In addition, to achieve the above object, the present invention also provides a kind of display devices, which is characterized in that the display device
The white balance of the display device is adjusted using the white balance parameter generation method of four color pixel as described above.
The white balance parameter generation method and display device for four color pixel of one kind that the embodiment of the present invention proposes, pass through first root
Object brightness after obtaining according to default gamma value with the matched four color pixels colour mixture of preset brightness index change curve, further according to
The object brightness of each grayscale after aim colour angle value and colour mixture obtains mapping for the grayscale value of condition display panel white balance
Table provides a kind of method for making display panel reach white balance of efficiently and accurately, improves the display effect of display panel.
Detailed description of the invention
Fig. 1 is the flow diagram of one embodiment of white balance parameter generation method of four color pixels of the invention；
After Fig. 2 obtains four color pixel colour mixtures in one embodiment of white balance parameter generation method for four color pixels of the invention
The corresponding flow diagram of the refinement step of white balance target chromatic value；
Fig. 3 is that third mapping relations and the are obtained in one embodiment of white balance parameter generation method of four color pixels of the invention
The corresponding flow diagram of the refinement step of four mapping relations；
Fig. 4 be obtained in another embodiment of white balance parameter generation method of four color pixels of the invention third mapping relations and
The corresponding flow diagram of refinement step of 4th mapping relations.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
The primary solutions of the embodiment of the present invention are:
White balance target chromatic value after obtaining four color pixel colour mixtures, wherein four color pixel includes white pixel, red
Color pixel, green pixel and blue pixel；
It is obtained and the preset matched object brightness of brightness index change curve, the object brightness according to default gamma value
For the object brightness of each grayscale after four color pixel colour mixtures；
Grayscale value mapping table is obtained according to the object brightness of each grayscale after the aim colour angle value and the colour mixture, with
The white balance of display panel is adjusted according to the grayscale value mapping table, the grayscale mapping table includes the input grayscale of each pixel
With the mapping relations of output grayscale.
The white balance parameter generation method and display device for four color pixel of one kind that the embodiment of the present invention proposes, pass through first root
Object brightness after obtaining according to default gamma value with the matched four color pixels colour mixture of preset brightness index change curve, further according to
The object brightness of each grayscale after aim colour angle value and colour mixture obtains mapping for the grayscale value of condition display panel white balance
Table provides a kind of method for making display panel reach white balance of efficiently and accurately, improves the display effect of display panel.
Referring to Fig.1, one embodiment of the invention provides a kind of four color pixel white balance parameter generation methods, the method packet
It includes:
Step S10, the white balance target chromatic value after four color pixel colour mixtures is obtained, wherein four color pixel includes white
Color pixel, red pixel, green pixel and blue pixel；
White balance parameter obtained in the present embodiment can be used for the white balance adjusting of the display panel in display device, tool
Body is desktop computer, laptop, tablet computer, mobile terminal, monitoring terminal or television terminal etc. with LCD screen
Display device.
In the present embodiment, as shown in Fig. 2, can successively as steps described below S11~S12 obtain four color pixel colour mixtures after
White balance target chromatic value.
Step S11 obtains the spectrum stimulus value of each pixel highest grayscale；
Measurement obtains the Y-coordinate spectrum stimulus value of the highest grayscale of each grayscale of each pixel of display, such as in 8bit picture
Display white pixel is measured when plain digit code in the spectrum stimulus value of the 255th grayscale, including X-coordinate spectrum stimulus value WX
(255), Y-coordinate spectrum stimulus value WY (255), Z coordinate spectrum stimulus value WZ (255), same method obtain red picture respectively
Element, green pixel and blue pixel three coordinate spectrum stimulus values, including RX (255), RY (255), RZ (255), GX (255),
GY(255)、GZ(255)、BX(255)、BY(255)、BZ(255)。
Step S12 obtains described four according to the spectrum stimulus value of each pixel highest grayscale and preset gamma value
White balance target chromatic value after color pixel colour mixture.
Specifically, fixed chromatic value Wx, Wy are obtained according to following equation:
Wx=WX (255)+RX (255)+GX (255)+BX (255)/X
Wy=WY (255)+RY (255)+GY (255)+BY (255)/X
Wherein X=WX (255)+RX (255)+GX (255)+BX (255)+
WY(255)+RY(255)+GY(255)+BY(255)+WZ(255)+RZ(255)+GZ(255)+BZ(255)
Step S20, described according to default gamma value acquisition and the preset matched object brightness of brightness index change curve
Object brightness is the object brightness of each grayscale after four color pixel colour mixtures；
Meet the principle of grayscale index variation according to brightness change, the object brightness of each grayscale of colour mixture is according to following equation
It obtains:
WY ' (n)=(WY (255)+RY (255)+GY (255)+BY (255)) (n/255) ^ γ
I.e. the object brightness of each grayscale of colour mixture is bright by each grayscale object brightness, each grayscale of red pixel of white pixel
Degree, each gray-scale intensity of green pixel are added to obtain with each gray-scale intensity of blue pixel, it is hereby achieved that various pixels
Each grayscale object brightness.
Step S30, grayscale value is obtained according to the object brightness of each grayscale after the aim colour angle value and the colour mixture
Mapping table, to adjust the white balance of display panel according to the grayscale value mapping table, the grayscale mapping table includes each pixel
Input grayscale and output grayscale mapping relations.
The process nature of white balance adjusting be the colour correction by being carried out to display reach aim colour angle value and with
The object brightness that predetermined luminance curve matches, such as using the i-th rank grayscale value of white pixel as input grayscale value driving
When display is shown, the brightness of the white pixel of corresponding output object brightness corresponding not equal to input grayscale value i, then needing
Grayscale value j is found as output grayscale value, the brightness of the white pixel of the corresponding output of the output grayscale value j close to output
The corresponding relationship of the input grayscale value i found and output grayscale value j are used for display by the corresponding object brightness of grayscale value i
Colour correction, to reach white balance.
For the white balance adjusting of four color pixel display panels, then need to obtain the input grayscale of each pixel with it is defeated
The mapping relations of grayscale out.Further, as shown in figure 3, obtaining each pixel input ash according to following step S31~S35
The mapping relations of rank and output grayscale:
Step S31 is obtained according to the intrinsic brilliance of the object brightness and each grayscale of each grayscale of the white pixel
The white pixel input grayscale and the first mapping relations for exporting grayscale；
Step S32 is obtained according to the intrinsic brilliance of the object brightness and each grayscale of each grayscale of the green pixel
The green pixel input grayscale and the second mapping relations for exporting grayscale；
Step S33, after obtaining colour mixture according to the object brightness of each grayscale after the aim colour angle value and the colour mixture
Each grayscale goal stimulus value；
Step S34, according to the goal stimulus value of each grayscale, first mapping relations and described second after the colour mixture
Mapping relations obtain third mapping relations and the 4th mapping relations, wherein the third mapping relations are that the red pixel is defeated
Enter grayscale and export the mapping relations of grayscale, the 4th mapping relations are that the blue pixel inputs grayscale and exports grayscale
Mapping relations；
Step S35, according to first mapping relations, the second mapping relations, third mapping relations and the 4th mapping relations
Obtain the grayscale value mapping table for being used for white balance adjusting.
The white pixel to play a decisive role in colour mixture brightness and green picture are first obtained according to above-mentioned steps S31~S35
The grayscale mapping relations of element, then the grayscale mapping relations of red pixel and blue pixel are obtained, error can be effectively reduced, is improved
The accuracy of white balance conditions.
In the present embodiment, the first mapping that white pixel input grayscale and output grayscale are obtained in above-mentioned steps S31 is closed
The principle of system is described below with specific method:
The object brightness formula of each grayscale of above-mentioned colour mixture is further converted are as follows:
WY ' (n)=WY (nw)+RY (nr)+GY (ng)+BY (nb) wherein n, nw, nr, ng, nb=0~255.
WY (nw) is intrinsic brilliance of the white pixel when exporting grayscale value and being nw, and value meets following equation, wherein public
γ 1 in formula then for the corresponding input signal of white pixel and output signal of the display of white balance to be regulated conversion because
Son:
WY (nw)=WY (255) * (nw/255) ^ γ 1
White pixel output grayscale value nw is determined according to following formula and inputs the corresponding relationship of grayscale value n:
WY (255) * (nw/255) ^ γ 1=WY (255) * (n/255) ^ γ
Specifically, 1 value of γ that can measure the white pixel of the display of white balance to be regulated, can be according to above-mentioned public affairs
Formula obtains the corresponding relationship of nw value and n value, as shown in table 1 below.
Table 1:
| n | nw |
| 0 | 0 |
| 1 | 4 |
| 2 | 10 |
| 3 | 13 |
| …… | …… |
| 254 | 254 |
| 255 | 255 |
It, can be aobvious with the white pixel unit of each input grayscale value driving display panel in another optional embodiment
Show, obtains display panel in each grayscale value and drive brightness value when showing, using brightness value as each grayscale of white pixel
Intrinsic brilliance.Specifically, can be since most high-order such as 255 ranks, the traversal setting institute on the display of white balance to be regulated
There is input grayscale value, the corresponding relationship of nw value Yu n value is obtained by the method for measurement.
Such as correct now be white pixel unit on display grayscale 100 white balance, at this time by nw initial value
100 are set as, drives white pixel unit to show with input grayscale value 100, is measured by optical gauge and currently to be shown
Tristimulus values is measured, measurement brightness of the white pixel when inputting grayscale value and being 100 is calculated by the measurement tristimulus values, by this
The target brightness value for measuring brightness and the 100th rank of white pixel carries out difference comparsion, if difference not in default range, just
Nw value is set as 101 or sets 99 for nw value, the process for repeating above-mentioned calculating, display, measuring, comparing, when finding one
Difference corresponding to nw just has found nw value corresponding with input grayscale value 100 in preset range.
In the present embodiment, the first mapping that green pixel input grayscale and output grayscale are obtained in above-mentioned steps S32 is closed
The principle of system with method particularly includes:
Due to the white balance after red pixel, green pixel, blue pixel colour mixture brightness with the influence of green pixel most
Greatly, it is assumed that the brightness curtain time variation of the white balance after red pixel, green pixel, blue pixel colour mixture is equal to green pixel
Brightness curtain time variation, determine green pixel output grayscale value ng according to following formula and input the corresponding relationship of grayscale value n, it is public
γ 2 in formula then for the corresponding input signal of green pixel and output signal of the display of white balance to be regulated conversion because
Son:
GY (255) * (ng/255) ^ γ 2=GY (255) (n/255) ^ γ
Specifically, green pixel is obtained in the spectrum stimulus value GY (255) of highest grayscale), then such as the right side of above-mentioned formula
Shown in side, each ash of green pixel is obtained according to the spectrum stimulus value of green pixel highest grayscale and the preset gamma value γ
The object brightness of rank, then 1 value of γ of the green pixel of the display of white balance to be regulated is measured, such as the left side institute of above-mentioned formula
Show, obtain green pixel in the intrinsic brilliance of each grayscale, to obtain the output grayscale value ng and input grayscale of green pixel
The mapping relations of value n.
The specific implementation method that equations used by white pixel acquisition mapping relations or measurement are compared can be same
Sample is applied to the acquisition of the mapping relations of green pixel.
In the present embodiment, according to following chromaticity coordinate calculation formula in above-mentioned steps S34, according to target chrominance coordinates
Wx, Wy and each grayscale object brightness WY ' (n) of colour mixture calculate goal stimulus value WX ' (n) and WZ ' of each grayscale after colour mixture
(n)。
WX ' (n)==Wx*WY (n)/Wy
WZ ' (n)=(1-Wx-Wy) * WY (n)/Wy
After obtaining colour mixture after the goal stimulus value of each grayscale, as shown in figure 4, above-mentioned steps S34 can be under
State the input and output grayscale mapping relations that step S301~S303 obtains red pixel and blue pixel.
Step S301 obtains the input signal of red pixel and the conversion factor of output signal in display panel；
Step S302 obtains the input signal of blue pixel and the conversion factor of output signal in display panel；
Step S303, according to the goal stimulus value of each grayscale, the conversion factor of the red pixel, institute after the colour mixture
State blue pixel conversion factor, first mapping relations and second mapping relations obtain the third mapping relations and
4th mapping relations.
Step S301~S303 realization principle and specific method are described below:
According to addition colour mixture principle, each grayscale target tristimulus values and each grayscale of various pixels that can list four colour mixtures are stimulated
The equation of value is as follows:
WX ' (n)=WX (nw)+RX (nr)+GX (ng)+BX (nb) ... (1)
WY ' (n)=WY (nw)+RY (nr)+GY (ng)+BY (nb) ... (2)
WZ ' (n)=WZ (nw)+RZ (nr)+GZ (ng)+BZ (nb) ... (3)
Because WX ' (n), WY ' (n), WZ ' (n), WX (nw), WY (nw), WZ (nw), GX (ng), GY (ng), GZ (ng) are
It is known, thus above three formula can simplify for
RX (nr)+BX (nb)=WX ' (n)-WX (nw)-GX (ng) ... (4)
RY (nr)+BY (nb)=WY ' (n)-WY (nw)-GY (ng) ... (5)
RZ (nr)+BZ (nb)=WZ ' (n)-WZ (nw)-GZ (ng) ... (6)
And have:
RX (nr)=RX (255) * (nr/255) ^ γRx, wherein γRxFor the conversion factor of red pixel
RY (nr)=RY (255) * (nr/255) ^ γRy, wherein γRyFor the conversion factor of red pixel
RZ (nr)=RZ (255) * (nr/255) ^ γRz, wherein γRzFor the conversion factor of red pixel
It should be noted that the conversion factor of red pixel is turn of the corresponding input signal of red pixel and output signal
Change the factor.
Equally have:
BX (nb)=BX (255) * (nb/255) ^ γBx, wherein γBxFor the conversion factor of blue pixel
BY (nb)=BY (255) * (nb/255) ^ γBy, wherein γByFor the conversion factor of blue pixel
BZ (nb)=BZ (255) * (nb/255) ^ γBz, wherein γBzFor the conversion factor of blue pixel
It should be noted that the conversion factor of blue pixel is turn of the corresponding input signal of blue pixel and output signal
Change the factor.
So (4), (5), (6) three equations are corresponding to only have nr, two unknown numbers of nb, it is possible to according to preset algorithm
Most ideal nr value and nb value are got, is met (4), (5), the condition of (6) three equatioies.
For example, obtaining third mapping relations and the 4th mapping relations according to the following method:
1, the method for first passing through measurement obtains the conversion factor of the red pixel of the display of white balance to be regulated, while
The conversion factor of the blue pixel of the display of white balance to be regulated is obtained by the method for measurement；
2, calculating is begun stepping through from most high-order or lowest price.Such as current calculate arrives n=3 rank, according to chromaticity coordinate Wx, Wy
And WY ' (3) calculates the value of WX ' (3) and WZ ' (3)；
3, white picture corresponding with currently processed grayscale value n=3 can be obtained from the grayscale value mapping table of white pixel
The grayscale value nw=13 of element, obtains the values WX (13), WY (13) and WZ (13) of white pixel, while from the ash of green pixel
Rank is worth the grayscale value ng=15 that green pixel corresponding with currently processed grayscale value n=3 can be obtained in mapping table, obtains green
Values GX (15), GY (15) and the GZ (15) of pixel.
4, according to WX ' (3), WY ' (3), WZ ' (3), WX (13), WY (13), WZ (13), GX (15), GY (15) and GZ (15)
And following formula can be obtained in above-mentioned formula:
RX(255)*(nr/255)^γRx+BX(255)*(nb/255)^γBx=
WX’(3)-WX(13)-GX(15)……(7)
RY(255)*(nr/255)^γRy+BY(255)*(nb/255)^γBy=
WY’(3)-WY(13)-GY(15)……(8)
RZ(255)*(nr/255)^γRz+BZ(255)*(nb/255)^γBz=
WZ’(3)-WZ(13)-GZ(15)……(9)
The corresponding grayscale value nr of red pixel and the corresponding grayscale value of blue pixel can be obtained according to preset derivation algorithm
nb。
For example, obtaining the corresponding grayscale value nr of red pixel according to a kind of preset derivation algorithm and blue pixel is corresponding
The method of grayscale value nb are as follows:
1, Mathematical is carried out according to above-mentioned formula (7)~(9), obtains nr value exact numerical corresponding with nb value, the essence
Exact figures value is decimal, obtains the corresponding integer range of nr and the corresponding integer set of nb, such as nr value is that 3.35, nb value is
5.65, then it can determine that the corresponding integer set of nr is [3,4], the corresponding integer set of nb is [5,6]；
2, each integer in the integer set of nr and nb is traversed, multiple integers pair of nr Yu nb value is obtained, obtains one by one
Summation of each integer to corresponding red pixel values Yu green pixel values is taken, summation and target summing value are chosen
Immediate integer is to the value as nr and nb.
In the present embodiment, by first being obtained and preset brightness index change curve matched four according to default gamma value
Object brightness after color pixel colour mixture is obtained further according to the object brightness of each grayscale after aim colour angle value and colour mixture for item
The grayscale value mapping table of part display panel white balance provides a kind of side for making display panel reach white balance of efficiently and accurately
Method improves the display effect of display panel.
In addition, the embodiment of the present invention also proposes that a kind of display device, the display device include array substrate, source drive
The white balance parameter of unit, drive element of the grid and printed circuit board, four for example above-mentioned color pixels of the display device applications is raw
The white balance of the display device is adjusted at method.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the system that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or system institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or system.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical solution of the present invention substantially in other words does the prior art
The part contributed out can be embodied in the form of software products, which is stored in one as described above
In storage medium (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a terminal device (can be liquid crystal electricity
Depending on, liquid crystal display etc.) execute method described in each embodiment of the present invention.
The above is only alternative embodiments of the invention, are not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of white balance parameter generation method of four color pixels, which is characterized in that the white balance parameter of four color pixel is raw
At method the following steps are included:
White balance target chromatic value after obtaining four color pixel colour mixtures, wherein four color pixel includes white pixel, red picture
Element, green pixel and blue pixel；
It is obtained according to default gamma value and the preset matched object brightness of brightness index change curve, the object brightness is four
The object brightness of each grayscale after color pixel colour mixture；
Grayscale value mapping table is obtained according to the object brightness of each grayscale after the aim colour angle value and the colour mixture, with basis
The grayscale value mapping table adjusts the white balance of display panel, the grayscale mapping table include each pixel input grayscale with it is defeated
The mapping relations of grayscale out.
2. the white balance parameter generation method of four color pixel as described in claim 1, which is characterized in that described according to the mesh
The step of object brightness of each grayscale after mark chromatic value and the colour mixture obtains grayscale value mapping table include:
The white pixel is obtained according to the intrinsic brilliance of the object brightness of each grayscale of the white pixel and each grayscale
It inputs grayscale and exports the first mapping relations of grayscale；
The green pixel is obtained according to the intrinsic brilliance of the object brightness of each grayscale of the green pixel and each grayscale
It inputs grayscale and exports the second mapping relations of grayscale；
Each grayscale after obtaining colour mixture according to the object brightness of each grayscale after the aim colour angle value and the colour mixture
Goal stimulus value；
It is obtained according to the goal stimulus value of each grayscale, first mapping relations and second mapping relations after the colour mixture
Third mapping relations and the 4th mapping relations, wherein the third mapping relations are that the red pixel inputs grayscale and output
The mapping relations of grayscale, the 4th mapping relations are that the blue pixel inputs grayscale and exports the mapping relations of grayscale；
It obtains grayscale value according to first mapping relations, the second mapping relations, third mapping relations and the 4th mapping relations and reflects
Firing table.
3. the white balance parameter generation method of four color pixel as claimed in claim 2, which is characterized in that described according to described white
The object brightness of each grayscale of color pixel and the intrinsic brilliance of each grayscale obtain the white pixel input grayscale and output
Before the step of first mapping relations of grayscale further include:
Obtain the Y-coordinate spectrum stimulus value of the white pixel highest grayscale；
The target for obtaining each grayscale of the white pixel according to the Y-coordinate spectrum stimulus value and the default gamma value is bright
Degree.
4. the white balance parameter generation method of four color pixel as claimed in claim 2, which is characterized in that described according to described white
The object brightness of each grayscale of color pixel and the intrinsic brilliance of each grayscale obtain the white pixel input grayscale and output
Before the step of first mapping relations of grayscale further include:
Obtain the input signal of white pixel and the conversion factor of output signal in display panel；
The white pixel is obtained according to the spectrum stimulus value of the conversion factor of the white pixel and white pixel highest grayscale
The intrinsic brilliance of each grayscale.
5. the white balance parameter generation method of four color pixel as claimed in claim 2, which is characterized in that described according to described white
The object brightness of each grayscale of color pixel and the intrinsic brilliance of each grayscale obtain the white pixel input grayscale and output
Before the step of first mapping relations of grayscale further include:
The white pixel unit of the display panel is driven to show with each input grayscale value；
It obtains the display panel and drives brightness value when showing in each grayscale value；
Using the brightness value as the intrinsic brilliance of each grayscale of the white pixel.
6. the white balance parameter generation method of four color pixel as claimed in claim 2, which is characterized in that described according to described green
The object brightness of each grayscale of color pixel and the intrinsic brilliance of each grayscale obtain the green pixel input grayscale and output
Before the step of second mapping relations of grayscale further include:
Green pixel is obtained in the spectrum stimulus value of highest grayscale；
The each ash of the green pixel is obtained according to the spectrum stimulus value of green pixel highest grayscale and the preset gamma value
The object brightness of rank.
7. the white balance parameter generation method of four color pixel as claimed in claim 6, which is characterized in that described according to described green
The object brightness of each grayscale of color pixel and the intrinsic brilliance of each grayscale obtain the green pixel input grayscale and output
Before the step of second mapping relations of grayscale further include:
The green pixel cell of the display panel is driven to show with each grayscale value；
It obtains the display panel and drives brightness value when showing in each grayscale value；
Using the brightness value as the intrinsic brilliance of each grayscale of the green pixel.
8. the white balance parameter generation method of four color pixel as described in claim 1, which is characterized in that the basis presets gal
Horse value obtain object brightness matched with preset brightness index change curve the step of include:
Obtain the spectrum stimulus value of the four color pixels highest grayscale；
It is obtained and preset brightness index according to the spectrum stimulus value of the four color pixels highest grayscale and the default gamma value
The matched object brightness of change curve, wherein the object brightness is the object brightness of each grayscale after four color pixel colour mixtures.
9. such as the white balance parameter generation method of described in any item four color pixels of claim 2 to 8, which is characterized in that described
Third is obtained according to the goal stimulus value of each grayscale, first mapping relations and second mapping relations after the colour mixture
The step of mapping relations and four mapping relations includes:
Obtain the input signal of red pixel and the conversion factor of output signal in display panel；
Obtain the input signal of blue pixel and the conversion factor of output signal in display panel；
According to the goal stimulus value of each grayscale after the colour mixture, the conversion factor of the red pixel, the blue pixel
Conversion factor, first mapping relations and second mapping relations obtain the third mapping relations and the 4th mapping
Relationship.
10. a kind of display device, which is characterized in that the display device applications as claimed in any one of claims 1-9 wherein four
The white balance parameter generation method of color pixel is to adjust the white balance of the display device.
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