CN109147712A - A kind of method and system for the visual angle colour cast improving display panel - Google Patents
A kind of method and system for the visual angle colour cast improving display panel Download PDFInfo
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- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
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Abstract
The present invention provides a kind of method and system of visual angle colour cast for improving display panel, this method comprises: the practical tristimulus values of corresponding full grayscale red, green, blue and white is as initial data under positive angle and side view angle when S1, measurement display panel do not carry out blank level adjustment；S2, the RGB grayscale value for setting 255 grayscale white；S3, the theoretical RGB grayscale value for calculating full gray level white balance；Actual color coordinate variance data when S4, calculating display panel show image frame under the theoretical RGB grayscale value of full gray level white balance, under positive angle and under side view angle；Variance data between S5, calculating actual color coordinate variance data and setting specification data is as the first variance data；S6, judge whether actual color coordinate difference value meets the specification of setting, if it is not, then adjusting the RGB grayscale value of 255 grayscale white according to the first variance data, and return to step S3.The present invention can be effectively improved the visual angle colour cast of display panel, and not will increase the cost of center control panel also.
Description
Technical field
The present invention relates to field of display technology more particularly to it is a kind of improve display panel visual angle colour cast method and be
System.
Background technique
VA (Vertical Alignment, vertical orientation technology) display screen has the big visual angle colour cast of bus,
Colour cast problem under colour of skin visual angle is even more serious.For problems, improved often by the design in display screen；Example
Such as: the pixel of display screen being designed, the pixel of display screen is revised as to the scheme of 8domain, or (also cry and patrol in Tcon
Volume plate shields driving plate, center control panel) on increase and improve the function at visual angle and improved.
The principle of the scheme of 8domain is that pixel is divided into main pixel and sub-pixel when preparing pixel, main pixel and time
Pixel has different area and voltage ratio, so that main pixel and sub-pixel show luminance difference, so as to improve big view
The colour cast effect at angle.But the shortcomings that scheme of 8domain, is, the process of preparation includes the processing procedure of etching, the system of etching
Journey needs to use mask plate again, it is required that mask plate can be more complicated, need to redesign, lead to higher cost.
Increase the function of improving visual angle on Tcon, this kind of scheme is to adjacent pixel by Tcon with different pixels
Voltage to keep the brightness of adjacent pixel different, and then improves the colour cast at big visual angle.This kind of scheme needs to carry out hardware to Tcon
Extension, and then will increase the cost of Tcon, also, improve visual angle with this solution, when display panel is in low ash rank, have sudden strain of a muscle
Bright problem occurs, and image quality is bad.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of method and system of visual angle colour cast for improving display panel,
It can be effectively improved the visual angle colour cast of display panel, and not will increase the cost of center control panel also.
A kind of method of visual angle colour cast improving display panel provided by the invention, includes the following steps:
When S1, measurement display panel do not carry out blank level adjustment, corresponding full ash under positive angle and side view angle
The practical tristimulus values of rank red, green, blue and white is as initial data；
S2, the RGB grayscale value for setting 255 grayscale white；
S3, full gray level white balance is calculated according to the RGB grayscale value and the initial data of the 255 grayscale white of setting
Theoretical RGB grayscale value；
When S4, calculating display panel show image frame under the theoretical RGB grayscale value of full gray level white balance, image frame
Actual color coordinate variance data under positive angle and under side view angle；
Variance data between S5, the calculating actual color coordinate variance data and setting specification data is as the first difference
Data；
S6, judge whether the actual color coordinate difference value meets the specification of setting according to first variance data, if
It is no, then according to the RGB grayscale value of the set 255 grayscale white of first variance data adjustment, and step S3 is returned to, until
The actual color coordinate variance data meets the specification of setting.
Preferably, step S3 specifically includes following step:
According to the reality of grayscale RGB complete in the RGB grayscale value of the 255 grayscale white of setting and the initial data
Tristimulus values calculates the chromaticity coordinates of 255 grayscale white, and sits the chromaticity coordinates of 255 grayscale white as the color of full grayscale white
Mark, also according to the gamma curve of setting, calculates the brightness value of full grayscale, and according to the chromaticity coordinates of full grayscale white and full grayscale
Brightness value, calculate the theoretical tristimulus values of full grayscale white；
According to the initial data, the theoretical tristimulus values for the full grayscale white being calculated is modified, is repaired
The theoretical tristimulus values of full grayscale white after just；
According to the theoretical tristimulus values of revised full grayscale white, the theory of corresponding full gray level white balance is calculated
RGB grayscale value.
Preferably, according to the initial data, the theoretical tristimulus values for the full grayscale white being calculated is modified,
The theoretical tristimulus values of revised full grayscale white is obtained, includes following step:
According to the practical tristimulus of the practical tristimulus values of grayscale white complete in the initial data and full grayscale RGB
The correction factor of full grayscale is calculated in corresponding relationship between value；
According to the correction factor of the full grayscale, the theoretical tristimulus values of full grayscale white is corrected.
Preferably, according to the theoretical tristimulus values of revised full grayscale white, it is white flat that corresponding full grayscale is calculated
The theoretical RGB grayscale value of weighing apparatus, includes following step:
When calculating the theoretical RGB grayscale value of k grayscale white, first from practical the three of the full grayscale green of the initial data
The m grayscale for finding out brightness closest to k grayscale white in values is green；
N grayscale red and p grayscale are found out from the practical tristimulus values of the red indigo plant of the full grayscale of the initial data again
Blue, so that the chromaticity coordinates for the white that n grayscale is red, p grayscale blue and m grayscale green form and the color of k grayscale white are sat
It marks closest；
When the brightness for the white that n grayscale is red, p grayscale blue and m grayscale green form does not meet the bright of k grayscale white
When spending, then red n-i1 grayscale, p-i2 grayscale blue and m-i3 grayscale green are selected, so that n-i1 grayscale is red, p-i2 ash
The brightness of rank blue and m-i3 grayscale green composition white meets the brightness of k grayscale white, according to the red ash finally determined
The theoretical RGB grayscale value of rank, green grayscale, blue grayscale as k grayscale white；Wherein, i1, i2, i3 are setting correction value.
Preferably, further include following step between step S3 and S4:
S30, according to the reality of grayscale RGB complete in the theoretical RGB grayscale value of full gray level white balance and the initial data
Border tristimulus values calculates theoretical Yxy value of the image frame shown on display panel under front viewing angle and side view angle；
Step S4 includes following step:
When executing step S4 for the first time, controls the display panel and show figure under the theoretical RGB grayscale value of full gray level white balance
As picture, and practical Yxy value of the image frame under positive angle and side view angle is measured, and according to image frame at positive visual angle
It is poor that practical Yxy value under degree and under side view angle calculates actual color coordinate of the image frame under positive angle and under side view angle
Heteromerism evidence, and image frame is calculated with the theoretical Yxy value under side view angle under positive angle according to image frame and is being faced
Theoretical chromaticity coordinates variance data under angle and under side view angle, also calculates the actual color coordinate variance data and the theory
Variance data between chromaticity coordinates variance data is as the second variance data；
When not being to execute step S4 for the first time, according to newest theoretical chromaticity coordinates variance data and the second difference number
According to newest actual color coordinate variance data is calculated.
Preferably, step S30 includes following step:
According to the given RGB grayscale value of image frame, and the theoretical RGB grayscale value of full gray level white balance, obtain image
The theoretical RGB grayscale value of picture；
It is pierced according to practical the three of grayscale RGB complete in the theoretical RGB grayscale value of image frame and the initial data
Swash value, the theoretical tristimulus values of image frame is calculated, and according to the theoretical tristimulus values for the image frame being calculated, meter
Calculate theoretical Yxy value of the image frame shown on display panel under front viewing angle and side view angle.
Preferably, it controls the display panel and shows image frame under the theoretical RGB grayscale value of full gray level white balance, including under
State step:
The theoretical RGB grayscale value write-in of full gray level white balance is used to drive the center control panel of display panel；
The center control panel is handled viewdata signal according to the theoretical RGB grayscale value of full gray level white balance,
It is converted to the LVDS signal of driving display panel, and the LVDS that LVDS signal is delivered to display panel is received into chip.
The present invention provides a kind of system of visual angle colour cast for improving display panel, comprising: data acquisition module, data processing
Module；
The data acquisition module, when not carrying out blank level adjustment for measuring display panel, positive angle and side
The practical tristimulus values of corresponding full grayscale red, green, blue and white is as initial data under angle, and measures display panel in full ash
When showing image frame under the theoretical RGB grayscale value of rank white balance, reality of the image frame under positive angle and under side view angle
Border Yxy value；
The data processing module, for according to the 255 grayscale white of setting RGB grayscale value and the initial data
It calculates the theoretical RGB grayscale value of full gray level white balance, and the write-in of the theoretical RGB grayscale value of full gray level white balance is used to drive aobvious
Show the center control panel of panel, and calculates display panel and show that image is drawn under the theoretical RGB grayscale value of full gray level white balance
When face, actual color coordinate variance data of the image frame under positive angle and under side view angle, and calculate the practical color
Variance data between coordinate variance data and setting specification data is as the first variance data, also according to the first difference number
It is judged that whether the actual color coordinate difference value meets the specification of setting, if it is not, then being adjusted according to first variance data
The RGB grayscale value of set 255 grayscale white, then again according to the RGB grayscale value of 255 grayscale white adjusted and institute
The theoretical RGB grayscale value that initial data calculates full gray level white balance is stated, until the actual color coordinate variance data meets setting
Specification.
Preferably, the data processing module, for according to the RGB grayscale value of the 255 grayscale white of setting and described
The practical tristimulus values of full grayscale RGB in initial data calculates the chromaticity coordinates of 255 grayscale white, and 255 grayscale are white
Chromaticity coordinates of the chromaticity coordinates as full grayscale white calculate the brightness value of full grayscale also according to the gamma curve of setting, and according to
The chromaticity coordinates of full grayscale white and the brightness value of full grayscale, calculate the theoretical tristimulus values of full grayscale white, further according to described
Initial data is modified the theoretical tristimulus values for the full grayscale white being calculated, and obtains revised full grayscale white
Theoretical tristimulus values, and according to the theoretical tristimulus values of revised full grayscale white, corresponding full grayscale is calculated
The theoretical RGB grayscale value of white balance.
Preferably, the data processing module is also used to according to the theoretical RGB grayscale value of full gray level white balance and described
The practical tristimulus values of full grayscale RGB in initial data calculates image frame shown on display panel in front viewing angle
And the theoretical Yxy value under side view angle；
And the data processing module, it is also used to the reality according to image frame under positive angle and under side view angle
Yxy value calculates actual color coordinate variance data of the image frame under positive angle and under side view angle, and is drawn according to image
Theoretical Yxy value of the face under positive angle and under side view angle calculates reason of the image frame under positive angle and under side view angle
By chromaticity coordinates variance data, the difference between the actual color coordinate variance data and the theoretical chromaticity coordinates variance data is also calculated
Heteromerism is according to as the second variance data, and according to newest theoretical chromaticity coordinates variance data and second variance data,
Newest actual color coordinate variance data is calculated.
The invention has the following beneficial effects: the method for the visual angle colour cast provided by the invention for improving display panel
And system, when first measurement display panel does not carry out white balance adjusting, corresponding full grayscale under positive angle and side view angle
The tristimulus values of four kinds of colors of red, green, blue and white resets the RGB grayscale value of 255 grayscale white, according to 255 as initial data
The RGB grayscale value and initial data of grayscale white calculate the theoretical RGB grayscale value of full gray level white balance, so that full grayscale
The theoretical RGB grayscale value of white balance can be more nearly the requirement of the white balance of display panel, then detect display panel in full ash
When showing image frame under the theoretical RGB grayscale value of rank white balance, reality of the image frame under positive angle and under side view angle
Whether border chromaticity coordinates variance data is up to specification, if do not met, according to actual color coordinate variance data and setting specification value
Between difference determine 255 grayscale white RGB grayscale value adjustment direction, and then adjust the theoretical RGB of full gray level white balance
Grayscale value, in this way can be to avoid being blindly adjusted, and then can save the time of adjustment, meets display panel white
The requirement of balance, and the visual angle colour cast of display panel also complies with specification, solves the problems, such as the big visual angle colour cast of display panel.
The present invention only needs the full grayscale theory RGB grayscale value of calculating center control panel is written, and does not need centering
The hardware of heart control panel is extended, and does not need the cost of increase center control panel, the sudden strain of a muscle of low ash rank image frame will not occurs
Bright problem.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the flow chart of the method for the visual angle colour cast provided by the invention for improving display panel.
Fig. 2 is the functional block diagram of the system of the visual angle colour cast provided by the invention for improving display panel.
Specific embodiment
The present invention provides a kind of method of visual angle colour cast for improving display panel, as shown in Figure 1, this method includes following steps
It is rapid:
When S1, measurement display panel do not carry out blank level adjustment, corresponding full ash under positive angle and side view angle
The practical tristimulus values of rank red, green, blue and white, and using these practical tristimulus values as initial data.Here it is possible to pass through color point
Analyzer measures tristimulus values, and the side view angle of selection can be 30 degree, 45 degree, 60 degree etc..
S2, the RGB grayscale value for setting 255 grayscale white；For example, can set the grayscale value of 255 grayscale white as 255,
254,254, i.e. 255 grayscale whites are red by 255 grayscale, 254 grayscale are green and 254 grayscale blues are constituted.
S3, the theory that full gray level white balance is calculated according to the RGB grayscale value and initial data of the 255 grayscale white of setting
RGB grayscale value.
When S4, calculating display panel show image frame under the theoretical RGB grayscale value of full gray level white balance, image frame
Actual color coordinate variance data under positive angle and under side view angle.Here, actual color coordinate variance data, for example, figure
As actual color coordinate of the picture under positive angle is x1y1, actual color coordinate under side view angle is x2y2, and practical color is sat
Mark variance data may include △ x and △ y, △ x=x1-x2, △=y1-y2.Here the preferred colour of skin image of image frame.
Variance data between S5, calculating actual color coordinate variance data and setting specification data is as the first difference number
According to.
S6, judge whether actual color coordinate difference value meets the specification of setting according to the first variance data, if it is not, then basis
The RGB grayscale value of the set 255 grayscale white of first variance data adjustment, and step S3 is returned to, until actual color coordinate is poor
Heteromerism is according to the specification for meeting setting.
Above-mentioned step S1~S6 is successively executed.
For example, actual color coordinate of the image frame under positive angle is x1y1, the actual color coordinate under side view angle is
X2y2, the first variance data include the difference value △ x=x1-x2 faced with side view angle, and the specification requirement △ x of setting does not surpass
0.03 is crossed, then setting specification value can be 0.03, if, x > 0.03 △, then judging that difference value △ x does not meet the rule of setting
For lattice it is necessary to readjust the RGB grayscale value of the 255 grayscale white of setting, the direction reduced toward △ x adjusts 255 grayscale white
RGB grayscale value.
More specifically, can first by the grayscale value of R or B in the RGB grayscale value of 255 grayscale white carry out up-regulation or under
It adjusts, then obtains the change direction of difference value △ x, so that it may know the change direction of the grayscale value of R or B and the change direction of △ x
Between relationship, so that it may facilitate the adjustment of the RGB grayscale value of subsequent 255 grayscale white.
Step S3 specifically includes following step:
It is pierced according to practical the three of grayscale RGB complete in the RGB grayscale value of the 255 grayscale white of setting and initial data
Swash value, calculates the chromaticity coordinates of 255 grayscale white, and using the chromaticity coordinates of 255 grayscale white as the chromaticity coordinates of full grayscale white, also
According to the gamma curve of setting, the brightness value of full grayscale is calculated, so that the brightness value of full grayscale is all satisfied the gamma curve, and root
According to the chromaticity coordinates of full grayscale white and the brightness value of full grayscale, the theoretical tristimulus values of full grayscale white is calculated.
According to initial data, the theoretical tristimulus values for the full grayscale white being calculated is modified, after obtaining amendment
Full grayscale white theoretical tristimulus values.
According to the theoretical tristimulus values of revised full grayscale white, the theory of corresponding full gray level white balance is calculated
RGB grayscale value.
According to initial data, the theoretical tristimulus values for the full grayscale white being calculated is modified, after obtaining amendment
Full grayscale white theoretical tristimulus values, include following step:
According to the practical tristimulus values of the practical tristimulus values of grayscale white complete in initial data and full grayscale RGB it
Between corresponding relationship, the correction factor of full grayscale is calculated；
According to the correction factor of full grayscale, the theoretical tristimulus values of full grayscale white is corrected.
For example, 255 grayscale whites of setting are made of the blue of the red of 255 grayscale, the green of 254 grayscale, 254 grayscale,
The tristimulus values of 255 grayscale red is XR255, YR in initial data255、ZR255, the tristimulus values of 255 grayscale green is XG255、
YG255、ZG255, the tristimulus values of 255 grayscale blue is XB255、YB255、ZB255, the tristimulus values of 255 grayscale white is XW255、
YW255、ZW255, the tristimulus values of 254 grayscale red is XR in initial data254、YR254、ZR254, the tristimulus of 254 grayscale green
Value is XG254、YG254、ZG254, the tristimulus values of 254 grayscale blue is XB254、YB254、ZB254, the tristimulus of 254 grayscale white
Value is XW254、YW254、ZW254。
So,255The theoretical tristimulus values of grayscale white is XW255’、YW255’、ZW255', it can be calculated in this way:
XW255'=XR255+XG254+XB254, YW255'=YR255+YG254+YB254, ZW255'=ZR255+ZG254+ZB254。
According to the theoretical tristimulus values of 255 grayscale white, the chromaticity coordinates xy, x=of 255 grayscale white can be calculated
XW255’/(XW255’+YW255’+ZW255'), y=YW255’/(XW255’+YW255’+ZW255'), the chromaticity coordinates of full grayscale white is
xy。
The brightness for setting full grayscale white meets gamma curve, can set corresponding gamma value as 2.2 ± 0.2, thus
The brightness value of available full grayscale white, can be calculated according to the chromaticity coordinates of full grayscale and the brightness value of full grayscale
The theoretical tristimulus values of full gray level white balance.For example, the theoretical tristimulus values of k grayscale white is set as XWk’、YWk’、ZWk', wherein x
=XWk’/(XWk’+YWk’+ZWk'), y=YWk’/(XWk’+YWk’+ZWk'), YWk' be k grayscale white brightness value, xy it is known that
The theoretical tristimulus values of k grayscale white, 0≤k≤255 may finally be calculated.
Three correction factors of the theoretical tristimulus values of amendment k grayscale white, k ash are available for according to initial data
The practical tristimulus values of rank red is XRk、YRk、ZRk, the practical tristimulus values of k grayscale green is XGk、YGk、ZGk, k grayscale indigo plant
The practical tristimulus values of color is XBk、YBk、ZBk, the practical tristimulus values of k grayscale white is XWk、YWk、ZWk。
Three correction factors for correcting the theoretical tristimulus values of k grayscale white are respectively as follows: XWk/(XRk+XGk+XBk)、
YWk/(YRk+YGk+YBk)、ZWk/(ZRk+ZGk+ZBk), correct the theoretical tristimulus of k grayscale white respectively by these three coefficients
Value XWk’、YWk’、ZWk', the theoretical tristimulus values of revised k grayscale white is XWk*XWk’/(XRk+XGk+XBk)、YWk*
YWk’/(YRk+YGk+YBk)、ZWk*ZWk’/(ZRk+ZGk+ZBk), since in actual value, the practical tristimulus values of k grayscale white is not
It is equal to the practical tristimulus values of the practical tristimulus values of k grayscale red, the practical tristimulus values of k grayscale green, k grayscale blue
Corresponding summation, such as XWk≠XRk+XGk+XBk, YWk≠YRk+YGk+YBk, ZWk≠ZRk+ZGk+ZBk, therefore, it is necessary to pass through amendment
Coefficient is modified the theoretical tristimulus values for the k grayscale white being calculated, and corresponding correction factor is exactly according to reality
What the difference in value between the practical tristimulus values of k grayscale white and the practical tristimulus values of k grayscale RGB obtained, in this way may be used
So that the theoretical tristimulus values of revised k grayscale white is more accurate.
According to the theoretical tristimulus values of revised full grayscale white, the theory of corresponding full gray level white balance is calculated
RGB grayscale value, includes following step:
When calculating the theoretical RGB grayscale value of k grayscale white, first from the practical tristimulus of the full grayscale green of initial data
The m grayscale for finding out brightness closest to k grayscale white in value is green；
N grayscale red and p grayscale blue are found out from the practical tristimulus values of the red indigo plant of the full grayscale of initial data again,
So that n grayscale is red, p grayscale blue and m grayscale green form the chromaticity coordinates of white and the chromaticity coordinates of k grayscale white most connect
Closely；
When the brightness for the white that n grayscale is red, p grayscale blue and m grayscale green form does not meet the bright of k grayscale white
When spending, then red n-i1 grayscale, p-i2 grayscale blue and m-i3 grayscale green are selected, so that n-i1 grayscale is red, p-i2 ash
The brightness of rank blue and m-i3 grayscale green composition white meets the brightness of k grayscale white, according to the red ash finally determined
The theoretical RGB grayscale value of rank, green grayscale, blue grayscale as k grayscale white, here, i1, i2, i3 are setting correction value,
I1 can just be born, i2 can just be born, i3 can just be born, i1, i2, i3 can it is identical can not also be identical, i1, i2, i3 are preferably three
A identical number.
In general, green is to determine the display panel brightness most important point, therefore, first according to k grayscale white
Brightness determines green grayscale, that is to say the grayscale value of G in RGB grayscale value.The chromaticity coordinates xy for analyzing k grayscale white again, original
The red and blue tristimulus values of each grayscale is searched in data, so that the chromaticity coordinates after three kinds of colors combinations of RGB is closest
Red grayscale, green grayscale, blue grayscale thus are primarily determined, for example, tentatively by the chromaticity coordinates xy of k grayscale white
It is confirmed that n grayscale is red, p grayscale blue and m grayscale green, corresponding RGB grayscale value that is to say n, m, p.
Certainly, n grayscale is red, p grayscale is blue and the brightness of the white of m grayscale green composition may be white with k grayscale
The brightness of color finally has difference, and usually n grayscale is red, p grayscale is blue and the brightness of the white of m grayscale green composition can be high
In the brightness of k grayscale white, then, just red grayscale, green grayscale, blue grayscale are lowered i grayscale, such as lowered
1 grayscale, for example, finally determining that the brightness of red n-i grayscale, p-i grayscale blue and m-i grayscale green composition white meets
The brightness of k grayscale white.At this point, the n-i grayscale decided is red, p-i grayscale blue and m-i grayscale green composition are white
Chromaticity coordinates generally also comply with the chromaticity coordinates of k grayscale white.If the n-i grayscale decided is red, p-i grayscale blue with
And the chromaticity coordinates of m-i grayscale green composition white does not meet the chromaticity coordinates of k grayscale white, then again through red ash determined above
The method of rank and blue grayscale is adjusted, and may finally determine the theoretical RGB grayscale value of k grayscale white.
Further, further include following step between step S3 and S4:
S30, the reality three according to grayscale RGB complete in the theoretical RGB grayscale value and initial data of full gray level white balance
Values calculates theoretical Yxy value of the image frame shown on display panel under front viewing angle and side view angle.It needs
Illustrate, the Y in Yxy value that is to say the value of Y in tristimulus values XYZ, indicate brightness, and xy is the chromaticity coordinates of color.
Step S4 includes following step:
When executing step S4 for the first time, controls the display panel and show figure under the theoretical RGB grayscale value of full gray level white balance
As picture, and practical Yxy value of the image frame under positive angle and side view angle is measured, and according to image frame at positive visual angle
It is poor that practical Yxy value under degree and under side view angle calculates actual color coordinate of the image frame under positive angle and under side view angle
Heteromerism evidence, and image frame is calculated with the theoretical Yxy value under side view angle under positive angle according to image frame and is being faced
Theoretical chromaticity coordinates variance data under angle and under side view angle, also calculating actual color coordinate variance data and theoretical chromaticity coordinates are poor
Variance data of the heteromerism between is as the second variance data.
When not being to execute step S4 for the first time, according to newest theoretical chromaticity coordinates variance data and the second variance data,
Newest actual color coordinate variance data is calculated.
For example, image frame includes the reality under positive angle in the practical Yxy value under positive angle and side view angle
Actual color coordinate x2y2 under border chromaticity coordinates x1y1 and side view angle, image frame is under positive angle and side view angle
It include the theoretical chromaticity coordinates x3y3 under the positive angle and theoretical chromaticity coordinates x4y4 under side view angle in theoretical Yxy value.This
In, actual color coordinate difference △ x=x1-x2, the △ y=y1-y2 faced under side view visual angle can be calculated, and calculate
It faces and calculates the difference of △ x Yu △ x ' with theoretical chromaticity coordinates difference △ x '=x3-x4 under side view visual angle, △ y '=y3-y4
The difference △ Y of △ X and △ y and △ y '.Next time adjust during, after calculating theoretical Yxy value, obtain facing with
Theoretical chromaticity coordinates difference △ x ' and △ y ' under side view visual angle carries out complement value to △ x ' and △ y ' respectively using △ X and △ Y, just
Actual color coordinate difference △ x and △ y of the image frame under positive angle and side view angle can be extrapolated, so there is no need to
Measure by color analysis instrument, the time of blank level adjustment can be saved.
Further, step S30 includes following step:
According to the given RGB grayscale value of image frame, and the theoretical RGB grayscale value of full gray level white balance, obtain image
The theoretical RGB grayscale value of picture；
According to the practical tristimulus values of grayscale RGB complete in the theoretical RGB grayscale value and initial data of image frame,
The theoretical tristimulus values of image frame is calculated, and according to the theoretical tristimulus values for the image frame being calculated, calculates aobvious
Show theoretical Yxy value of the image frame shown on panel under front viewing angle and side view angle.
For example, given RGB grayscale value a, b, c of image frame can according to the theoretical RGB grayscale value of full gray level white balance
To obtain the theoretical RGB grayscale value of a grayscale white as XWa, YWa, ZWa, the theoretical RGB grayscale value of b grayscale white be XWb,
The theoretical RGB grayscale value of YWb, ZWb, c grayscale white are XWc, YWc, ZWc, then the theoretical RGB grayscale value of image frame is
XWa、YWb、ZWc。
It controls the display panel and shows image frame under the theoretical RGB grayscale value of full gray level white balance, include the following steps:
It is used to drive the center control panel of display panel (to that is to say the theoretical RGB grayscale value write-in of full gray level white balance
Tcon)；
Center control panel is handled viewdata signal according to the theoretical RGB grayscale value of full gray level white balance, conversion
At LVDS (Low Voltage Differential Signaling, Low Voltage Differential Signal) signal of driving display panel, and
The LVDS that LVDS signal is delivered to display panel is received into chip.
The present invention also provides a kind of systems of visual angle colour cast for improving display panel, as shown in Fig. 2, the system 1 includes: number
According to acquisition module 11, data processing module 12.
When data acquisition module 11 does not carry out blank level adjustment for measuring display panel, positive angle and side view angle
The practical tristimulus values of corresponding full grayscale red, green, blue and white is white in full grayscale as initial data, and measurement display panel under degree
When showing image frame under the theoretical RGB grayscale value of balance, practical Yxy of the image frame under positive angle and under side view angle
Value.Wherein, data acquisition module 11 can be color analysis instrument.
Data processing module 12 is used to be calculated according to the RGB grayscale value and initial data of the 255 grayscale white of setting complete
The theoretical RGB grayscale value of gray level white balance, and be used for the write-in of the theoretical RGB grayscale value of full gray level white balance to drive display panel
Center control panel 2, and calculate display panel when showing image frame under the theoretical RGB grayscale value of full gray level white balance,
Actual color coordinate variance data of the image frame under positive angle and under side view angle, and calculate actual color coordinate difference number
According to the variance data between setting specification data as the first variance data, judge that practical color is sat also according to the first variance data
Whether mark difference value meets the specification of setting, if it is not, then according to the set 255 grayscale white of the first variance data adjustment
RGB grayscale value, then it is again white flat according to the RGB grayscale value of 255 grayscale white adjusted and the full grayscale of initial data calculating
The theoretical RGB grayscale value of weighing apparatus, until actual color coordinate variance data meets the specification of setting.
Further, data processing module 12 is used for according to the RGB grayscale value of the 255 grayscale white of setting and original
The practical tristimulus values of full grayscale RGB in data calculates the chromaticity coordinates of 255 grayscale white, and by the color of 255 grayscale white
Coordinate calculates the brightness value of full grayscale also according to the gamma curve of setting as the chromaticity coordinates of full grayscale white, and according to full ash
The chromaticity coordinates of rank white and the brightness value of full grayscale calculate the theoretical tristimulus values of full grayscale white, further according to initial data,
The theoretical tristimulus values for the full grayscale white being calculated is modified, the theory three for obtaining revised full grayscale white is pierced
Swash value, and according to the theoretical tristimulus values of revised full grayscale white, the reason of corresponding full gray level white balance is calculated
By RGB grayscale value.
Further, data processing module 12 is also used to according to the theoretical RGB grayscale value of full gray level white balance and original
The practical tristimulus values of full grayscale RGB in data, calculate image frame shown on display panel in front viewing angle and
Theoretical Yxy value under side view angle.
And data processing module 12 is also used to the practical Yxy value according to image frame under positive angle and under side view angle
Actual color coordinate variance data of the image frame under positive angle and under side view angle is calculated, and according to image frame just
Theoretical Yxy value under angle and under side view angle calculates theoretical color of the image frame under positive angle and under side view angle and sits
Variance data is marked, also the variance data between calculating actual color coordinate variance data and theoretical chromaticity coordinates variance data is as second
Variance data, and according to newest theoretical chromaticity coordinates variance data and the second variance data, newest reality is calculated
Chromaticity coordinates variance data.
In conclusion the method and system of the visual angle colour cast provided by the invention for improving display panel, first measure display surface
When plate does not carry out white balance adjusting, the three of corresponding complete four kinds of colors of grayscale red, green, blue and white under positive angle and side view angle
Values resets the RGB grayscale value of 255 grayscale white, according to the RGB grayscale value of 255 grayscale white as initial data
And initial data calculates the theoretical RGB grayscale value of full gray level white balance, so that the theoretical RGB grayscale of full gray level white balance
Value can be more nearly the requirement of the white balance of display panel, then detect display panel in the theoretical RGB ash of full gray level white balance
When showing image frame under rank value, whether actual color coordinate variance data of the image frame under positive angle and under side view angle
It is up to specification, if do not met, 255 grayscale are determined according to the difference between actual color coordinate variance data and setting specification value
The adjustment direction of the RGB grayscale value of white, and then the theoretical RGB grayscale value of full gray level white balance is adjusted, it in this way can be to avoid blind
Mesh is adjusted, and then can save the time of adjustment, and display panel is finally made to meet the requirement of white balance, and display surface
The visual angle colour cast of plate also complies with specification, solves the problems, such as the big visual angle colour cast of display panel.
The present invention only needs the full grayscale theory RGB grayscale value of calculating center control panel is written, and does not need centering
The hardware of heart control panel is extended, and hardly needs the cost of increase center control panel, low gray scale image will not be occurred and be drawn
The problem of face flashes.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (10)
1. a kind of method for the visual angle colour cast for improving display panel, which is characterized in that include the following steps:
When S1, measurement display panel do not carry out blank level adjustment, corresponding full grayscale is red under positive angle and side view angle
Turquoise white practical tristimulus values is as initial data；
S2, the RGB grayscale value for setting 255 grayscale white；
S3, the theory that full gray level white balance is calculated according to the RGB grayscale value and the initial data of the 255 grayscale white of setting
RGB grayscale value；
When S4, calculating display panel show image frame under the theoretical RGB grayscale value of full gray level white balance, image frame is just
Actual color coordinate variance data under angle and under side view angle；
Variance data between S5, the calculating actual color coordinate variance data and setting specification data is as the first difference number
According to；
S6, judge whether the actual color coordinate difference value meets the specification of setting according to first variance data, if it is not, then
According to the RGB grayscale value of the set 255 grayscale white of first variance data adjustment, and step S3 is returned to, until described
Actual color coordinate variance data meets the specification of setting.
2. the method for the visual angle colour cast according to claim 1 for improving display panel, which is characterized in that
Step S3 specifically includes following step:
It is pierced according to practical the three of grayscale RGB complete in the RGB grayscale value of the 255 grayscale white of setting and the initial data
Swash value, calculates the chromaticity coordinates of 255 grayscale white, and using the chromaticity coordinates of 255 grayscale white as the chromaticity coordinates of full grayscale white, also
According to the gamma curve of setting, the brightness value of full grayscale is calculated, and according to the bright of the chromaticity coordinates of full grayscale white and full grayscale
Angle value calculates the theoretical tristimulus values of full grayscale white；
According to the initial data, the theoretical tristimulus values for the full grayscale white being calculated is modified, after obtaining amendment
Full grayscale white theoretical tristimulus values；
According to the theoretical tristimulus values of revised full grayscale white, the theoretical RGB of corresponding full gray level white balance is calculated
Grayscale value.
3. the method for the visual angle colour cast according to claim 2 for improving display panel, which is characterized in that according to described original
Data are modified the theoretical tristimulus values for the full grayscale white being calculated, and obtain the reason of revised full grayscale white
Include following step by tristimulus values:
According to the practical tristimulus values of the practical tristimulus values of grayscale white complete in the initial data and full grayscale RGB it
Between corresponding relationship, the correction factor of full grayscale is calculated；
According to the correction factor of the full grayscale, the theoretical tristimulus values of full grayscale white is corrected.
4. according to the method for the visual angle colour cast as claimed in claim 2 for improving display panel, which is characterized in that according to revised complete
The theoretical tristimulus values of grayscale white is calculated the theoretical RGB grayscale value of corresponding full gray level white balance, includes following steps
It is rapid:
When calculating the theoretical RGB grayscale value of k grayscale white, first from the practical tristimulus of the full grayscale green of the initial data
The m grayscale for finding out brightness closest to k grayscale white in value is green；
N grayscale red and p grayscale blue are found out from the practical tristimulus values of the red indigo plant of the full grayscale of the initial data again,
So that n grayscale is red, p grayscale blue and m grayscale green form the chromaticity coordinates of white and the chromaticity coordinates of k grayscale white most connect
Closely；
When the brightness for the white that n grayscale is red, p grayscale blue and m grayscale green form does not meet the brightness of k grayscale white
When, then red n-i1 grayscale, p-i2 grayscale blue and m-i3 grayscale green are selected, so that n-i1 grayscale is red, p-i2 grayscale
The brightness of blue and m-i3 grayscale green composition white meets the brightness of k grayscale white, according to the finally red grayscale of determination,
The theoretical RGB grayscale value of green grayscale, blue grayscale as k grayscale white；Wherein, i1, i2, i3 are setting correction value.
5. the method for the visual angle colour cast according to claim 1 for improving display panel, which is characterized in that in step S3 and S4
Between further include following step:
S30, the reality three according to grayscale RGB complete in the theoretical RGB grayscale value of full gray level white balance and the initial data
Values calculates theoretical Yxy value of the image frame shown on display panel under front viewing angle and side view angle；
Step S4 includes following step:
When executing step S4 for the first time, controls the display panel and show that image is drawn under the theoretical RGB grayscale value of full gray level white balance
Face, and practical Yxy value of the image frame under positive angle and side view angle is measured, and according to image frame under positive angle
Actual color coordinate difference number of the image frame under positive angle and under side view angle is calculated with the practical Yxy value under side view angle
According to, and according to image frame under positive angle and side view angle under theoretical Yxy value calculate image frame in positive angle
Theoretical chromaticity coordinates variance data under lower and side view angle, also calculates the actual color coordinate variance data and the theoretical color is sat
The variance data between variance data is marked as the second variance data；
When not being to execute step S4 for the first time, according to newest theoretical chromaticity coordinates variance data and second variance data,
Newest actual color coordinate variance data is calculated.
6. the method for the visual angle colour cast according to claim 5 for improving display panel, which is characterized in that step S30 includes
There is following step:
According to the given RGB grayscale value of image frame, and the theoretical RGB grayscale value of full gray level white balance, obtain image frame
Theoretical RGB grayscale value；
According to the practical tristimulus values of grayscale RGB complete in the theoretical RGB grayscale value of image frame and the initial data,
The theoretical tristimulus values of image frame is calculated, and according to the theoretical tristimulus values for the image frame being calculated, calculates aobvious
Show theoretical Yxy value of the image frame shown on panel under front viewing angle and side view angle.
7. the method for the visual angle colour cast according to claim 6 for improving display panel, which is characterized in that control the display panel
Image frame is shown under the theoretical RGB grayscale value of full gray level white balance, is included the following steps:
The theoretical RGB grayscale value write-in of full gray level white balance is used to drive the center control panel of display panel；
The center control panel is handled viewdata signal according to the theoretical RGB grayscale value of full gray level white balance, conversion
Chip is received at the LVDS signal of driving display panel, and by the LVDS that LVDS signal is delivered to display panel.
8. a kind of system for the visual angle colour cast for improving display panel characterized by comprising data acquisition module, data processing
Module；
The data acquisition module, when not carrying out blank level adjustment for measuring display panel, positive angle and side view angle
The practical tristimulus values of corresponding full grayscale red, green, blue and white is white in full grayscale as initial data, and measurement display panel under degree
When showing image frame under the theoretical RGB grayscale value of balance, practical Yxy of the image frame under positive angle and under side view angle
Value；
The data processing module, for being calculated according to the RGB grayscale value of the 255 grayscale white of setting and the initial data
The theoretical RGB grayscale value of full gray level white balance, and be used for the write-in of the theoretical RGB grayscale value of full gray level white balance to drive display surface
The center control panel of plate, and display panel is calculated when showing image frame under the theoretical RGB grayscale value of full gray level white balance,
Actual color coordinate variance data of the image frame under positive angle and under side view angle, and the calculating actual color coordinate are poor
Heteromerism, as the first variance data, judges according to the variance data between setting specification data also according to first variance data
Whether the actual color coordinate difference value meets the specification of setting, if it is not, then according to set by first variance data adjustment
255 grayscale white RGB grayscale value, then again according to the RGB grayscale value of 255 grayscale white adjusted and described original
Data calculate the theoretical RGB grayscale value of full gray level white balance, until the actual color coordinate variance data meets the specification of setting.
9. the system of the visual angle colour cast according to claim 8 for improving display panel, which is characterized in that
The data processing module, for according in the RGB grayscale value of the 255 grayscale white of setting and the initial data
The practical tristimulus values of full grayscale RGB calculates the chromaticity coordinates of 255 grayscale white, and the chromaticity coordinates of 255 grayscale white is made
The brightness value of full grayscale is calculated also according to the gamma curve of setting for the chromaticity coordinates of full grayscale white, and according to full grayscale white
Chromaticity coordinates and full grayscale brightness value, calculate the theoretical tristimulus values of full grayscale white, it is right further according to the initial data
The theoretical tristimulus values for the full grayscale white being calculated is modified, and obtains the theoretical tristimulus of revised full grayscale white
Value, and according to the theoretical tristimulus values of revised full grayscale white, the theory of corresponding full gray level white balance is calculated
RGB grayscale value.
10. the system of the visual angle colour cast according to claim 8 for improving display panel, which is characterized in that
The data processing module is also used to according in the theoretical RGB grayscale value of full gray level white balance and the initial data
The practical tristimulus values of full grayscale RGB calculates image frame shown on display panel at front viewing angle and side view angle
Theoretical Yxy value under degree；
And the data processing module, it is also used to the practical Yxy value according to image frame under positive angle and under side view angle
Actual color coordinate variance data of the image frame under positive angle and under side view angle is calculated, and according to image frame just
Theoretical Yxy value under angle and under side view angle calculates theoretical color of the image frame under positive angle and under side view angle and sits
Variance data is marked, the variance data between the actual color coordinate variance data and the theoretical chromaticity coordinates variance data is also calculated
As the second variance data, and according to newest theoretical chromaticity coordinates variance data and second variance data, calculate
To newest actual color coordinate variance data.
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| CN112819908B (en) * | 2021-02-20 | 2022-11-22 | 歌尔光学科技有限公司 | White coordinate adjusting method and device, display and storage medium |
| CN113077742A (en) * | 2021-03-17 | 2021-07-06 | Tcl华星光电技术有限公司 | Adjusting method and adjusting device of display panel and display panel |
| CN113077742B (en) * | 2021-03-17 | 2023-02-07 | Tcl华星光电技术有限公司 | Adjusting method and adjusting device of display panel and display panel |
| CN113129813A (en) * | 2021-04-23 | 2021-07-16 | 利亚德光电股份有限公司 | White balance adjusting method and device and computer equipment |
| CN113129815B (en) * | 2021-04-23 | 2022-03-01 | 利亚德光电股份有限公司 | Color gamut coefficient processing method and device, LED display screen and computer equipment |
| CN113129815A (en) * | 2021-04-23 | 2021-07-16 | 利亚德光电股份有限公司 | Color gamut coefficient processing method and device, LED display screen and computer equipment |
| CN114739644A (en) * | 2022-06-10 | 2022-07-12 | 武汉精立电子技术有限公司 | Method, device and equipment for judging color cast and readable storage medium |
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