CN109712569A - A kind of method and OLED display panel reducing display color difference - Google Patents
A kind of method and OLED display panel reducing display color difference Download PDFInfo
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Abstract
The embodiment of the invention discloses a kind of methods and OLED display panel for reducing display color difference, it include: the first electric current calculated when display panel shows picture to be shown, for the first sub-pixel, according to the first grayscale value of the first sub-pixel, calculate the second electric current when display panel is in the white balance under the first grayscale value, and according to the resistance value of the peripheral circuit of display panel, the first electric current and the second electric current, calculate the grid voltage compensation rate of the first sub-pixel, compensated to the grid voltage of the first sub-pixel when showing picture to be shown.It can be seen that, for sub-pixel any in display panel, can according to it in picture to be shown grayscale, obtain the sum of the electric current of the display panel all sub-pixels in the white balance under the grayscale, and then obtain the grid voltage compensation rate of the sub-pixel, to compensate when showing picture to be shown to the grid voltage of the sub-pixel, to solve the problems, such as the display of OLED display panel, there are color difference.
Description
Technical field
The present invention relates to display technology field more particularly to a kind of methods and OLED display surface for reducing display color difference
Plate.
Background technique
AMOLED (Active Matrix Organic Light-Emitting Diode, active matrix organic light-emitting two
Polar body) in panel, the TFT (Thin Film Transistor, thin film transistor (TFT)) of each sub-pixel is electric current driving display.
It is limited by the design of panel TFT circuit, the source electrode of the TFT of all sub-pixels in panel is all connected to a public anode electricity
In pressure, since the metal line of TFT circuit in panel is there is certain resistance, to sub-pixel each in panel, although driving
The grid voltage that IC is provided is identical, but their practical source voltage is not identical, this makes each sub-pixel in panel practical
There is differences in the brightness shown under white balance state for the brightness of display and sub-pixel, can not open up so as to cause sub-pixel
Show the display effect under 2.2 curve of Gamma, Display panel has color difference.
In conclusion there is an urgent need for a kind of methods for reducing display color difference at present, to solve the face AMOLED in the prior art
The display of plate is there are color difference, the technical issues of can not showing actual displayed effect.
Summary of the invention
The present invention provides a kind of method and OLED display panel for reducing display color difference, to solve in the prior art
The display of AMOLED panel is there are color difference, the technical issues of can not showing actual displayed effect.
A kind of method reducing display color difference provided in an embodiment of the present invention, comprising:
First electric current of the display panel when showing picture to be shown is calculated, first electric current is the display surface
The sum of electric current when all sub-pixels show the picture to be shown on plate；
For the first sub-pixel, according to first sub-pixel in the picture to be shown corresponding first grayscale value,
The second electric current when the white balance that the display panel is under the first grayscale value is calculated, and according to the periphery of the display panel
The resistance value of circuit, first electric current and second electric current calculate the grid voltage compensation rate of first sub-pixel；Its
In, first sub-pixel is any sub-pixel on the display panel, and second electric current is institute on the display panel
The sum of electric current when thering is sub-pixel to show first grayscale value；
When showing the picture to be shown, according to the grid voltage compensation rate of first sub-pixel, to described first
The grid voltage of sub-pixel compensates.
Optionally, first electric current of the display panel when showing picture to be shown is calculated, comprising:
For the sub-pixel of any color, counts and be in each ash in the sub-pixel of color described in the picture to be shown
The number of the sub-pixel of rank value；For each grayscale value in each grayscale value, according in the grayscale value
The electric current of the sub-pixel of all colors, obtains when the number of the sub-pixel of color and white balance under the grayscale value
To the first electron current of display panel sub-pixel of the color when showing the picture to be shown；
According to the sum of first electron current of the sub-pixel of each color, first electric current is obtained.
Optionally, according to the sum of described first electron current of the sub-pixel of each color, first electric current is obtained, is wrapped
It includes:
Wherein, I1For first electric current, m and n are the resolution ratio of the display panel,It is described aobvious
Show the first electron current of panel red sub-pixel when showing the picture to be shown, SkIt is the display panel described in the display
When picture to be shown, grayscale value is the number of the red sub-pixel of k, I in all red sub-pixelsRkLocating for the display panel
When grayscale value is the white balance of k, the sum of the electric current of all red sub-pixels；Exist for the display panel
First electron current of green sub-pixels, P when showing the picture to be shownkThe picture to be shown is being shown for the display panel
When face, grayscale value is the number of the green sub-pixels of k, I in all green sub-pixelsGkGrayscale value is being in for the display panel
For k white balance when, the sum of the electric current of all green sub-pixels；The display panel display it is described to
First electron current of blue subpixels, Q when showing picturekIt is the display panel when showing the picture to be shown, it is described
Grayscale value is the number of the blue subpixels of k, I in all blue subpixels of display panelBkIt is being in for the display panel
When grayscale value is the white balance of k, the sum of the electric current of all blue subpixels.
Optionally, according to first sub-pixel in the picture to be shown corresponding first grayscale value, described in calculating
Display panel is in the second electric current when the white balance under the first grayscale value, comprising:
For the sub-pixel of any color, according to the corresponding relationship L of the brightness of the sub-pixel of the color and electric currentXGray=
a×IXGray+ b, first grayscale value calculate the display panel under first grayscale value by following formula
Second electron current of the sub-pixel of color when white balance:
Wherein, IXGrayFor second electron current, second electron current is that the display panel is in first ash
The sum of the electric current of sub-pixel of all colors when white balance under rank value, X indicate the color of sub-pixel, and Gray is described the
One grayscale value, IX255For the electricity of display panel sub-pixel of all colors in the white balance under 255 grayscale
The sum of stream, a, b are the linear coefficient in the brightness of sub-pixel and the corresponding relationship of electric current of the color；
According to the sum of the second electron current of the sub-pixel of each color, second electric current is obtained.
Optionally, the resistance value of the peripheral circuit of the display panel is calculated in the following way:
To set the sub-pixel that grayscale value individually lights setpoint color in the display panel, the setpoint color is obtained
The grid voltage desired value and actual gate voltage value of sub-pixel；
The display panel is calculated in the white balance under the setting grayscale value, is set described in the display panel
Determine the third electron current of the sub-pixel of other two kinds of colors other than color；Wherein, any color in other two kinds of colors
The third electron current of sub-pixel is the display panel all colors when showing the white balance under the setting grayscale value
The sum of the electric current of sub-pixel；
According to the grid voltage desired value, the actual gate voltage value, other two kinds of colors sub-pixel
Three electron currents calculate the resistance value of the peripheral circuit of the display panel.
Optionally, according to the resistance value of the peripheral circuit of the display panel, first electric current and second electric current,
The grid voltage compensation rate of first sub-pixel is calculated by following formula, comprising:
ΔVdata=(I2-I1)×r
Wherein, Δ VdataFor the grid voltage compensation rate of first sub-pixel, I2For second electric current, I1It is described
First electric current, r are the resistance value of the peripheral circuit of the display panel.
Based on same inventive concept, a kind of OLED display panel provided by the invention, comprising:
Processing module, for calculating first electric current of the display panel when showing picture to be shown, first electricity
Flow the sum of electric current when showing the picture to be shown for all sub-pixels on the display panel；
And for the first sub-pixel, according to first sub-pixel in the picture to be shown corresponding first ash
Rank value calculates the second electric current when the white balance that the display panel is under the first grayscale value, and according to the display panel
Peripheral circuit resistance value, first electric current and second electric current, the grid voltage for calculating first sub-pixel mends
The amount of repaying；Wherein, first sub-pixel is any sub-pixel on the display panel, and second electric current is the display surface
The sum of electric current when all sub-pixels show first grayscale value on plate；
Compensating module, for being compensated according to the grid voltage of first sub-pixel when showing the picture to be shown
Amount, compensates the grid voltage of first sub-pixel.
Optionally, the processing module is specifically used for:
For the sub-pixel of any color, counts and be in each ash in the sub-pixel of color described in the picture to be shown
The number of the sub-pixel of rank value；For each grayscale value in each grayscale value, according in the grayscale value
The electric current of the sub-pixel of all colors, obtains when the number of the sub-pixel of color and white balance under the grayscale value
To the first electron current of display panel sub-pixel of the color when showing the picture to be shown；
According to the sum of first electron current of the sub-pixel of each color, first electric current is obtained.
Optionally, the processing module is specifically also used to calculate first electric current according to the following formula:
Wherein, I1For first electric current, m and n are the resolution ratio of the display panel,It is described aobvious
Show the first electron current of panel red sub-pixel when showing the picture to be shown, SkIt is the display panel described in the display
When picture to be shown, grayscale value is the number of the red sub-pixel of k, I in all red sub-pixelsRkLocating for the display panel
When grayscale value is the white balance of k, the sum of the electric current of all red sub-pixels；Exist for the display panel
First electron current of green sub-pixels, P when showing the picture to be shownkThe picture to be shown is being shown for the display panel
When face, grayscale value is the number of the green sub-pixels of k, I in all green sub-pixelsGkGrayscale value is being in for the display panel
For k white balance when, the sum of the electric current of all green sub-pixels；The display panel display it is described to
First electron current of blue subpixels, Q when showing picturekIt is the display panel when showing the picture to be shown, it is described
Grayscale value is the number of the blue subpixels of k, I in all blue subpixels of display panelBkIt is being in for the display panel
When grayscale value is the white balance of k, the sum of the electric current of all blue subpixels.
Optionally, the processing module is specifically also used to:
For the sub-pixel of any color, according to the corresponding relationship L of the brightness of the sub-pixel of the color and electric currentXGray=
a×IXGray+ b, first grayscale value calculate the display panel under first grayscale value by following formula
Second electron current of the sub-pixel of color when white balance:
Wherein, IXGrayFor second electron current, second electron current is that the display panel is being in described first
The sum of the electric current of sub-pixel of all colors, L when white balance under grayscale valueXGrayFor the color sub-pixel first
Brightness when grayscale value, X indicate the color of sub-pixel, and Gray is first grayscale value, IX255Locating for the display panel
The sum of the electric current of sub-pixel of all colors when white balance under 255 grayscale, a, b are the bright of the sub-pixel of the color
Degree and the linear coefficient in the corresponding relationship of electric current；
According to the sum of the second electron current of the sub-pixel of each color, second electric current is obtained.
Optionally, the processing module is also used to:
To set the sub-pixel that grayscale value individually lights setpoint color in the display panel, the setpoint color is obtained
The grid voltage desired value and actual gate voltage value of sub-pixel；
The display panel is calculated in the white balance under the setting grayscale value, is set described in the display panel
Determine the third electron current of the sub-pixel of other two kinds of colors other than color；Wherein, any color in other two kinds of colors
The third electron current of sub-pixel is the display panel all colors when showing the white balance under the setting grayscale value
The sum of the electric current of sub-pixel；
According to the grid voltage desired value, the actual gate voltage value, other two kinds of colors sub-pixel
Second electron current calculates the resistance value of the peripheral circuit of the display panel.
Optionally, the processing module is specifically used for:
ΔVdata=(I2-I1)×r
Wherein, Δ VdataFor the grid voltage compensation rate of first sub-pixel, I2For second electric current, I1It is described
First electric current, r are the resistance value of the peripheral circuit of the display panel.
Another embodiment of the present invention provides a kind of OLED display panels comprising memory and processor, wherein described
Memory is for storing program instruction, and the processor is for calling the program instruction stored in the memory, according to acquisition
Program execute any of the above-described kind of method.
Another embodiment of the present invention provides a kind of computer storage medium, the computer-readable recording medium storage has
Computer executable instructions, the computer executable instructions are for making the computer execute any of the above-described kind of method.
In the embodiment of the present invention, by calculating first electric current of the display panel when showing picture to be shown, for first
Sub-pixel, according to the first sub-pixel, corresponding first grayscale value, calculating display panel are in the first grayscale in picture to be shown
The second electric current when white balance under value, and according to the resistance value of the peripheral circuit of display panel, the first electric current and the second electric current,
The grid voltage compensation rate of the first sub-pixel is calculated, and then when showing picture to be shown, according to the grid of the first sub-pixel electricity
Compensation rate is pressed, the grid voltage of the first sub-pixel is compensated.As it can be seen that due to for any sub-pixel in display panel,
The display panel can be obtained in the white balance under the first grayscale value according to its first grayscale value in picture to be shown
The sum of the electric current of all sub-pixels, and then the grid voltage compensation rate of the sub-pixel is calculated, when showing picture to be shown
The grid voltage of the sub-pixel is compensated, is that display panel is under the first grayscale value by the current correction of the sub-pixel
The size of current of sub-pixel when white balance, to solve the display of OLED display panel, there are color difference, can not show actual displayed
The problem of effect.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill in field, without any creative labor, it can also be obtained according to these attached drawings
His attached drawing.
Fig. 1 is flow diagram corresponding to a kind of method for reducing display color difference provided in an embodiment of the present invention；
Fig. 2 is stream corresponding to the method for the resistance value of peripheral circuit for calculating OLED display panel in the embodiment of the present invention
Journey schematic diagram；
Fig. 3 is a kind of circuit structure diagram of OLED display panel provided in an embodiment of the present invention；
Fig. 4 is a kind of structural schematic diagram of OLED display panel provided in an embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
One step it is described in detail, it is clear that described embodiment, only a part of the embodiment of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
All other embodiment, shall fall within the protection scope of the present invention.
The embodiment of the present invention is described in further detail with reference to the accompanying drawings of the specification.
Fig. 1 shows a kind of reduction provided in the embodiment of the present invention and shows the signal of process corresponding to the method for color difference
Figure, as shown in Figure 1, which comprises
Step S101: calculating first electric current of the display panel when showing picture to be shown, and first electric current is
The sum of electric current when all sub-pixels show the picture to be shown on the display panel；
Step S102: being directed to the first sub-pixel, according to first sub-pixel corresponding the in the picture to be shown
One grayscale value calculates the second electric current when the white balance that the display panel is under the first grayscale value, and according to the display
The resistance value of the peripheral circuit of panel, first electric current and second electric current calculate the grid electricity of first sub-pixel
Press compensation rate；Wherein, first sub-pixel is any sub-pixel on the display panel, and second electric current is described aobvious
Show the sum of electric current when all sub-pixels on panel show first grayscale value；
Step S103: right according to the grid voltage compensation rate of first sub-pixel when showing the picture to be shown
The grid voltage of first sub-pixel compensates.
As it can be seen that due to for any sub-pixel in display panel, it can be according to its first grayscale in picture to be shown
Value obtains the sum of the electric current of the display panel all sub-pixels in the white balance under the first grayscale value, and then calculates
The grid voltage compensation rate of the sub-pixel will to compensate when showing picture to be shown to the grid voltage of the sub-pixel
The current correction of the sub-pixel is the size of current of sub-pixel when display panel is in the white balance under the first grayscale value, to solve
The problem of certainly display of oled panel is there are color difference, can not show actual displayed effect.
Specifically, the picture to be shown is display panel any frame picture to be shown in step s101, when aobvious
Show that panel after getting the picture to be shown, can calculate the first electric current by executing step S101.Wherein, the first electric current is
The sum of electric current when all sub-pixels show the picture to be shown on display panel.If the resolution ratio of display panel is m × n, that
First electric current isHerein, Ii,jIndicate the electric current of the pixel arranged in the i-th row, jth.
In the embodiment of the present invention, array is placed with multiple pixels in display panel, any pixel therein include it is red,
Green, blue three-color sub-pixel.It therefore, can be by sub-pixel each in display panel after getting picture to be shown
Display grayscale counted, obtain the first electric current.Specific calculating process is as follows:
For the sub-pixel of any color, the son for being in each grayscale in picture to be shown in the sub-pixel of the color is counted
The number of pixel, and according in the number for the sub-pixel for being in each grayscale value in the sub-pixel of the color and display panel
The sum of the electric current of sub-pixel of all colors when white balance under each grayscale value obtains the display panel and is showing to aobvious
First electron current of the sub-pixel of color when showing picture.
By taking red sub-pixel as an example, the first electron current I of red sub-pixelRedMeet
Wherein, k indicates grayscale, and m × n is the resolution ratio of display panel, SkIndicate that display panel is showing the picture to be shown
When face, grayscale is the number of the red sub-pixel of k in all red sub-pixels of display panel, can be by picture to be shown
Display grayscale counted to obtain, IRkIndicate display panel all red sub-pixels when being the white balance of k in grayscale
The sum of electric current can be obtained by white picture color matching calculation.
Similarly, the first electron current I of green sub-pixelsGreenMeet:
Wherein, PkDisplay panel is indicated when showing the picture to be shown, ash in all green sub-pixels of display panel
Rank is the number of the green sub-pixels of k, can be counted to obtain by the display grayscale to picture to be shown, IGkIndicate display
The sum of the electric current of panel all green sub-pixels when being the white balance of k in grayscale, can be obtained by white picture color matching calculation.
First electron current I of blue subpixelsBlueMeet:
Wherein, QkDisplay panel is indicated when showing the picture to be shown, ash in all blue subpixels of display panel
Rank is the number of the blue subpixels of k, can be counted to obtain by the display grayscale to picture to be shown, IBkIndicate display
The sum of the electric current of panel all blue subpixels when being the white balance of k in grayscale, can be obtained by white picture color matching calculation.
In this way, in the first electron current for calculating display panel sub-pixel of each color when showing picture to be shown
Afterwards, the first electron current of the sub-pixel of each color is added, obtained summation is the first electric current.That is the first electric current I1Deng
In:
In the embodiment of the present invention, since display panel is specially OLED display panel, the brightness of each sub-pixel and electric current
Approximation meets following linear relationship:
LXGray=a × IXGray+ b formula five
Wherein, X indicates the color of sub-pixel, and value is red (R), green (G), one of blue (B) three kinds of colors, LXGrayTable
When showing that grayscale is Gray, the brightness of the sub-pixel of X color, IXGrayIndicate display panel in the white balance for being Gray in grayscale
When, the electric current summation of all sub-pixels of X color, a and b are the coefficient in the linear relationship, for the sub-pixel of different colours
For, the specific value of a and b are different.
In addition, the brightness of the sub-pixel of OLED display panel also meets Gamma2.2 curve:
Wherein, L255Brightness when for the grayscale of sub-pixel being 255, LGrayBrightness when for the grayscale of sub-pixel being Gray.
Above-mentioned formula five and formula six are subjected to simultaneous solution, can obtain when display panel is at grayscale being Gray's
When white balance, the electric current summation I of all sub-pixels of X colorXGray:
Wherein, IX255Indicate display panel in grayscale be 255 white balance when (when showing pure white picture), X face
The electric current summation of all sub-pixels of color.
By formula seven it is found that I in formula fourRk、IGkAnd IBkMeet respectively:
Wherein, IR255、IG255、IB255Respectively display panel (is shown pure white when being 255 white balance in grayscale
When picture), all red sub-pixels, all green sub-pixels, the electric current summation of all blue subpixels, they can be by white
Picture color matching calculation obtains, a1、b1For the corresponding coefficient of red sub-pixel, a2、b2For the corresponding coefficient of green sub-pixels, a3、b3
It, can be by being tested to obtain to display panel for the corresponding coefficient of blue subpixels.
In step s 102, for the first sub-pixel in display panel, (first sub-pixel is appointing in display panel
One sub-pixel), the first sub-pixel corresponding first grayscale value in picture to be shown can be got according to the picture to be shown, into
And it is directed to the sub-pixel of any color, by above-mentioned formula seven, when calculating display panel is in the white balance under the first grayscale value
Second electron current I of the sub-pixel of each colorXGray。
It should be noted that the second electron current of any color is indicated when display panel is white under the first grayscale value
When balance, the sum of electric current of sub-pixel of all colours of the color, specifically, in the son for calculating each color using formula seven
When the second electron current of pixel, X indicates that the color of sub-pixel, value are one of red, green, blue, and Gray indicates the first grayscale
Value.
Further, the second electron current of the sub-pixel of each color is added, obtains display panel in the
The second electric current I when white balance under one grayscale value2:
I2=IRGray+IGGray+IBGrayFormula nine
Further, according to the resistance value r of the peripheral circuit of display panel, the first electric current I1And the second electric current I2, pass through
Following formula calculates the grid voltage compensation rate of the first sub-pixel:
In the embodiment of the present invention, the resistance value of the peripheral circuit of display panel can be calculated in the following way, such as Fig. 2
It is shown, specifically comprise the following steps S201 to step S203:
Step S201: to set the sub-pixel that grayscale value individually lights setpoint color in display panel, setpoint color is obtained
Sub-pixel grid voltage desired value and actual gate voltage value；
Step S202: the display panel is calculated in the white balance under setting grayscale value, is set described in display panel
Determine the third electron current of the sub-pixel of other two kinds of colors other than color.
Step S203: according to grid voltage desired value, actual gate voltage value, other two kinds of colors sub-pixel second
Electron current calculates the resistance value of the peripheral circuit of the display panel.
Specifically, in step s 201, the sub-pixel of setpoint color can be in red, green, blue three kinds of colors
The sub-pixel of any color.Setting grayscale value can be specifically arranged according to the actual situation by those skilled in the art, generally
In the case of may be configured as 255 grayscale.
Using the sub-pixel of setpoint color as red sub-pixel, grayscale value is set as 255, to set the independent point of grayscale value
The sub-pixel of setpoint color refers in bright display panel, lights each sub-pixel in display panel with (255,0,0), that is,
It says, the grayscale of all red sub-pixels is 255 in display panel, and all greens, the grayscale of blue subpixels are 0, are shown
Show that panel is rendered as a pure red picture.
In step S202, other than the setpoint color, the of the sub-pixel of any color in other two kinds of colors
Three electron currents are display panel when display sets the white balance under grayscale value, the sum of the electric current of sub-pixel of all colors.
That is, the third electron current of green sub-pixels for display panel the viridescent son when showing the white balance under the setting grayscale value
The sum of electric current of pixel, the third electron current of blue subpixels are display panel when showing the white balance under the setting grayscale value
The sum of the electric current of sub-pixel of all blues.
In step S203, the resistance value r for calculating the peripheral circuit of display panel meets following formula:
Wherein, V 'dataFor the grid voltage desired value of the sub-pixel of setpoint color, can be obtained by theoretical calculation, VdataFor
The actual gate voltage value of the sub-pixel of setpoint color can be calculated, if X by reading the driving actual Data value of IC
For setpoint color, Y and Z indicate other two kinds of colors in addition to the setpoint color, IYGrayAnd IZGrayIt is illustrated respectively in display surface
When plate is in the white balance under setting grayscale value, the electric current summation of the sub-pixel of other two color.
It is red with setpoint color, set grayscale value as 255, the resistance value r satisfaction of the peripheral circuit of display panel:Wherein, IG255And IB255Respectively display panel is in the white balance under 255 grayscale (i.e. under 255 grayscale
Light the pure white picture of all green sub-pixels in display panel, blue subpixels) when, all green sub-pixels, blue
The electric current summation of pixel.
In this way, S101 and step S102, the grid that can calculate all sub-pixels in display panel are electric through the above steps
Compensation rate is pressed, and then in step s 103, can be mended when showing the picture to be shown according to the grid voltage of each sub-pixel
The amount of repaying compensates the grid voltage of each sub-pixel.
It should be noted that can be calculated in display panel before showing the picture to be shown in the embodiment of the present invention
The grid voltage compensation rate of all sub-pixels, then when showing the picture to be shown, the refreshing according to the picture to be shown is suitable
The each sub-pixel of ordered pair is compensated one by one；Can also when showing the picture to be shown, according to the refresh sequence of picture to be shown,
The grid voltage compensation rate of each sub-pixel is computed and compensated one by one, the present invention is not particularly limited this.
Fig. 3 is a kind of circuit structure diagram of the OLED display panel provided in the embodiment of the present invention, below with reference to Fig. 3 to this
The fall into a trap principle of grid voltage compensation rate of operator pixel of inventive embodiments is described in detail:
As shown in figure 3, array is placed with multiple pixels in the OLED display panel, the resolution ratio of the display panel is m*
N has m row, n column in the pixel array of display panel.Each of pixel array pixel includes 3 sub-pixels, color
It is red, green, blue respectively.Specifically, each sub-pixel is specially OLED (Organic Light Emitting Diode) device, each OLED
Device is by its corresponding TFT (thin film transistor (TFT)) electric current driving display, i.e., the gray-scale intensity of each sub-pixel is by by being somebody's turn to do
The electric current of sub-pixel determines.
In Fig. 3, the source electrode of the corresponding TFT of all sub-pixels is all connected to a common anode voltage in pixel array
On ELVDD, the cathode of all sub-pixels is all connected to a common cathode voltage ELVSS.In addition, each column in pixel array
Corresponding source (data) line of all sub-pixels, the grid of all sub-pixels on the column is all connected to the source line
On.As an example, the source line that the sub-pixel of rightmost in a pixel is connected is illustrated only in Fig. 3, but is answered
When note that the source line connection that the grid of the TFT of each sub-pixel is corresponding in pixel array.
By taking the sub-pixel of the X color of the i-th row jth column in pixel array as an example, the electric current for flowing through the sub-pixel is
IXi,j=C (Vgs-Vth)2Formula 12
Wherein, IXi,jFor the electric current of the sub-pixel of the X color of the i-th row jth column, C is coefficient, VthIt is corresponding for the sub-pixel
TFT cut-in voltage, VgsGate source voltage for the corresponding TFT of the sub-pixel is poor, it is contemplated that the display panel is in pixel array
After peripheral resistance r present in part in addition, gate source voltage difference may particularly denote again are as follows:
Wherein, VdataThe as grid voltage of the sub-pixel.
By formula 12 and formula 13 it is found that flowing through the electric current of the sub-pixel specifically:
As it can be seen that for the pixel (pixel for being located at the i-th row jth column in pixel array) where the sub-pixel, by
It include the sub-pixel that color is respectively three kinds of colors of red, green, blue in the pixel, therefore the electric current of the pixel can indicate
Are as follows:
Ii,j=IRi,j+IGi,j+IBi,jFormula 15
Wherein, Ii,jFor the electric current of the pixel, IRi,j、IGi,j、IBi,jRed respectively in the pixel, green, the sub- picture of blue
The electric current of element.
In turn, IR Drop caused by the resistance inside the pixel array in display panel is not considered, only considers pixel array
Peripheral circuit resistance in the case where, (red i.e. in display panel, green, blue when display panel shows pure white picture
The grayscale of sub-pixel is that 255), the electric current of any sub-pixel is equal in display panel:
IX255≈C(Vdata-Vth-ELVDD+(IR255+IG255+IB255)×r)2Formula 16
Wherein, IX255Indicate that the electric current of any sub-pixel, X are used to indicate the color of the sub-pixel, IR255Indicate display surface
Electric current summation of all red sub-pixels in grayscale 255, I in plateG255Indicate that all green sub-pixels are in ash in display panel
Electric current summation when rank 255, IB255Indicate electric current summation of all blue subpixels in grayscale 255 in display panel.
Similarly, (red, green, blue in display panel when display panel shows that grayscale is the white balance picture of Gray
The grayscale of sub-pixels is Gray), the electric current of any sub-pixel is equal to:
IXi,j≈C(Vdata-Vth-ELVDD+(IRGray+IGGray+IBGray)×r)2Formula 17
Wherein, IRGrayIndicate electric current summation of all red sub-pixels in grayscale Gray in display panel, IG255It indicates
Electric current summation of all green sub-pixels in grayscale Gray, I in display panelB255Indicate all sub- pictures of blue in display panel
Electric current summation of the element in grayscale Gray.
But when display panel is in actual work, the picture of display is usually all complicated picture, in this case,
The electric current of any sub-pixel is equal to:
Since the influence of peripheral electric resistance partial pressure is shown since display panel is when showing grayscale is the white balance picture of Gray
Show the electric current summation I of all sub-pixels in panelRGray+IGGray+IBGray, when with showing complicated picture, all sons in display panel
The electric current summation of pixelDifference, thus each sub-pixel is put down in display grayscale for the white of Gray in display panel
Gate source voltage difference V when weighing apparatus picturegs, with the gate source voltage difference V ' when display complexity picturegsDifference, thus it is each in display panel
Electric current of a sub-pixel when showing complicated picture is different from electric current when sub-pixel display white balance picture, and then results in
There is display color difference in display panel.
In order to eliminate display color difference, i.e., the display effect of sub-pixel each under complicated picture is corrected to aobvious under white balance
Show effect, it is desirable to the electric current I ' of each sub-pixel under complicated picturexi,jWith the electric current I under white balance stateXi,jIt is equal, therefore,
Need to change the grid voltage V of each sub-pixel under complicated picturedata, so that compensation after each sub-pixel gate source voltage difference V "gs
With gate source voltage difference V when white balancegsIt is equal, i.e. V "gs=Vgs。
By taking any sub-pixel as an example, it is assumed that after compensating to grid voltage, the grid voltage of the sub-pixel is V 'data,
The electric current of any sub-pixel is equal to after then compensating:
By I "Xi,j=IXi,jIt can obtain, the grid voltage offset of any sub-pixel is equal to Δ Vdata:
By formula 20 it can also be seen that individually lighting display in step S201 into step S203 to set grayscale value
In panel when the sub-pixel of setpoint color, if the size of known actual gate voltage value and grid voltage desired value can calculate
The size of the resistance r of display panel peripheral circuit.
Below with reference to a specific embodiment to a kind of process for the method for reducing display color difference provided in the present invention, especially
It is that the process of the grid voltage offset of calculating sub-pixel is specifically described.
For a display panel, the method in through the embodiment of the present invention adjust each sub-pixel grid voltage it
Before, the basic data for obtaining the display panel is first had to, as shown in table 1 below:
Table 1
Wherein, CIE-x and CIE-y indicates that chromaticity coordinates, W, R, G, B respectively indicate white, red, green, blue picture,
L255Indicate panel luminance of the sub-pixel when being in 255 grayscale.
By taking a certain pure color picture (180,204,68) as an example, display color difference of the picture before carrying out grid voltage compensation and
Luminance difference is as shown in table 2 below:
| Item | Before compensation (180,204,68) | It is theoretical | Color difference/luminance difference |
| CIE-x | 0.3854 | 0.3865 | 1.51JNCD |
| CIE-y | 0.5352 | 0.5198 | |
| L(nits) | 218 | 177.03 | 23.20% |
| Vdata-R | 4.3154 | ||
| Vdata-G | 4.1763 | ||
| Vdata-B | 4.5656 |
Table 2
According to the data in table 1, (the i.e. display surface when individually lighting the red sub-pixel in display panel with 255 grayscale
Plate shows (255,0,0)), calculate the resistance of the peripheral circuit of display panel are as follows:
In turn, according to formula 20, the grid of red, green in pure color picture (180,204,68), blue subpixels are calculated
Pole tension compensation rate.
By taking red sub-pixel as an example, the grayscale under the pure color picture of red sub-pixel is 180, then by the sub- picture of the red
The current correction of element is the electric current when display panel is in white balance picture (180,180,180) under grayscale is 180, such as
This, then the grid voltage compensation rate of red sub-pixel are as follows:
Wherein,It, can be by the pure white picture for the electric current summation of all sub-pixels under the pure white picture
Number red under face, that green, blue sub-pixel are under each grayscale is counted, and is then calculated according to formula four.
Since the picture is a pure color picture, the grayscale of all red sub-pixels is 180 in display panel, all green sub-pixels
Grayscale be 204, the grayscale of all blue subpixels is 68, therefore in formula four,It is every
It is 1, And then it obtains:
ΔVdata-R=(IG180+IB180-IG204-IB68) × r=0.03766V formula 23
Similarly, the grid voltage compensation rate of green sub-pixels can be obtained are as follows:
ΔVdata-G=(IR204+IB204-IR180-IB68) × r=0.06603V formula 24
The grid voltage compensation rate of blue subpixels are as follows:
ΔVdata-B=(IR60+IG60-IR180-IG204) × r=-0.04133V formula 25
Further, the grid voltage of sub-pixel each in display panel is compensated, i.e., added original grid voltage
On the grid voltage offset that is calculated, obtain compensated grid voltage.It is red, green, blue subpixels in this example
Grid voltage is respectively 4.3531V, 4.2423V, 4.5246V.Then, grid voltage offset is converted to the display of each sub-pixel
Following data as shown in table 3 can be obtained in grayscale:
| Item | After compensation (172,188,75) | It is theoretical | Color difference/luminance difference |
| CIE-x | 0.3864 | 0.3865 | 0.58JNCD |
| CIE-y | 0.5137 | 0.5198 | |
| L(nits) | 182.7 | 177.03 | 3.20% |
| Vdata-R | 4.3531 | ||
| Vdata-G | 4.2423 | ||
| Vdata-B | 4.5246 |
Table 3
As can be seen from Table 3, luminance difference by original 23.2% falls to 3.2% after compensation, shows color difference by original
1.51JNCD is reduced to 0.58JNCD, and the display color difference problem of display panel is significantly improved.
Based on same inventive concept, the embodiment of the present invention also provides a kind of OLED display panel, and Fig. 4 is that the present invention is implemented
The structural schematic diagram of a kind of OLED display panel provided in example, as shown in figure 4, the OLED display panel 400 includes:
Processing module 401, for calculating first electric current of the display panel when showing picture to be shown, described first
Electric current is the sum of electric current when all sub-pixels show the picture to be shown on the display panel；
And for the first sub-pixel, according to first sub-pixel in the picture to be shown corresponding first ash
Rank value calculates the second electric current when the white balance that the display panel is under the first grayscale value, and according to the display panel
Peripheral circuit resistance value, first electric current and second electric current, the grid voltage for calculating first sub-pixel mends
The amount of repaying；Wherein, first sub-pixel is any sub-pixel on the display panel, and second electric current is the display surface
The sum of electric current when all sub-pixels show first grayscale value on plate；
Compensating module 402, for being mended according to the grid voltage of first sub-pixel when showing the picture to be shown
The amount of repaying compensates the grid voltage of first sub-pixel.
Optionally, the processing module 401 is specifically used for:
For the sub-pixel of any color, counts and be in each ash in the sub-pixel of color described in the picture to be shown
The number of the sub-pixel of rank value；For each grayscale value in each grayscale value, according in the grayscale value
The electric current of the sub-pixel of all colors, obtains when the number of the sub-pixel of color and white balance under the grayscale value
To the first electron current of display panel sub-pixel of the color when showing the picture to be shown；
According to the sum of first electron current of the sub-pixel of each color, first electric current is obtained.
Optionally, the processing module 401 is specifically also used to calculate first electric current according to the following formula:
Wherein, I1For first electric current, m and n are the resolution ratio of the display panel,It is described aobvious
Show the first electron current of panel red sub-pixel when showing the picture to be shown, SkIt is the display panel described in the display
When picture to be shown, grayscale value is the number of the red sub-pixel of k, I in all red sub-pixelsRkLocating for the display panel
When grayscale value is the white balance of k, the sum of the electric current of all red sub-pixels；Exist for the display panel
First electron current of green sub-pixels, P when showing the picture to be shownkThe picture to be shown is being shown for the display panel
When face, grayscale value is the number of the green sub-pixels of k, I in all green sub-pixelsGkGrayscale value is being in for the display panel
For k white balance when, the sum of the electric current of all green sub-pixels；The display panel display it is described to
First electron current of blue subpixels, Q when showing picturekIt is the display panel when showing the picture to be shown, it is described
Grayscale value is the number of the blue subpixels of k, I in all blue subpixels of display panelBkIt is being in for the display panel
When grayscale value is the white balance of k, the sum of the electric current of all blue subpixels.
Optionally, the processing module 401 is specifically also used to:
For the sub-pixel of any color, according to the corresponding relationship L of the brightness of the sub-pixel of the color and electric currentXGray=
a×IXGray+ b, first grayscale value calculate the display panel under first grayscale value by following formula
Second electron current of the sub-pixel of color when white balance:
Wherein, IXGrayFor second electron current, second electron current is that the display panel is being in described first
The sum of the electric current of sub-pixel of all colors, L when white balance under grayscale valueXGrayFor the color sub-pixel first
Brightness when grayscale value, X indicate the color of sub-pixel, and Gray is first grayscale value, IX255Locating for the display panel
The sum of the electric current of sub-pixel of all colors when white balance under 255 grayscale, a, b are the bright of the sub-pixel of the color
Degree and the linear coefficient in the corresponding relationship of electric current；
According to the sum of the second electron current of the sub-pixel of each color, second electric current is obtained.
Optionally, the processing module 401 is also used to:
To set the sub-pixel that grayscale value individually lights setpoint color in the display panel, the setpoint color is obtained
The grid voltage desired value and actual gate voltage value of sub-pixel；
The display panel is calculated in the white balance under the setting grayscale value, is set described in the display panel
Determine the third electron current of the sub-pixel of other two kinds of colors other than color；Wherein, any color in other two kinds of colors
The third electron current of sub-pixel is the display panel all colors when showing the white balance under the setting grayscale value
The sum of the electric current of sub-pixel；
According to the grid voltage desired value, the actual gate voltage value, other two kinds of colors sub-pixel
Second electron current calculates the resistance value of the peripheral circuit of the display panel.
Optionally, the processing module 401 is specifically used for:
ΔVdata=(I2-I1) × r formula 28
Wherein, Δ VdataFor the grid voltage compensation rate of first sub-pixel, I2For second electric current, I1It is described
First electric current, r are the resistance value of the peripheral circuit of the display panel.
Based on same inventive concept, the embodiment of the present invention also provides another OLED display panel, the OLED display surface
Plate may include central processing unit (Center Processing Unit, CPU), memory, input-output apparatus etc., input
Equipment may include keyboard, mouse, touch screen etc., and output equipment may include display equipment, such as liquid crystal display (Liquid
Crystal Display, LCD), cathode-ray tube (Cathode Ray Tube, CRT) etc..
Memory may include read-only memory (ROM) and random access memory (RAM), and provide storage to processor
The program instruction and data stored in device.In embodiments of the present invention, memory can be used for storing above-mentioned reduction display color difference
Method program.
Processor is by the program instruction for calling memory to store, and processor according to the program instruction of acquisition for executing
State the method for reducing display color difference.
Based on same inventive concept, the embodiment of the invention provides a kind of computer storage mediums, for being stored as
It states and calculates computer program instructions used in equipment, it includes the programs for showing the method for color difference for executing above-mentioned reduction.
The computer storage medium can be any usable medium or data storage device that computer can access, packet
Include but be not limited to magnetic storage (such as floppy disk, hard disk, tape, magneto-optic disk (MO) etc.), optical memory (such as CD, DVD,
BD, HVD etc.) and semiconductor memory (such as it is ROM, EPROM, EEPROM, nonvolatile memory (NAND FLASH), solid
State hard disk (SSD)) etc..
By above content it can be seen that
In the embodiment of the present invention, by calculating first electric current of the display panel when showing picture to be shown, for first
Sub-pixel, according to the first sub-pixel, corresponding first grayscale value, calculating display panel are in the first grayscale in picture to be shown
The second electric current when white balance under value, and according to the resistance value of the peripheral circuit of display panel, the first electric current and the second electric current,
The grid voltage compensation rate of the first sub-pixel is calculated, and then when showing picture to be shown, according to the grid of the first sub-pixel electricity
Compensation rate is pressed, the grid voltage of the first sub-pixel is compensated.As it can be seen that due to for any sub-pixel in display panel,
The display panel can be obtained in the white balance under the first grayscale value according to its first grayscale value in picture to be shown
The sum of the electric current of all sub-pixels, and then the grid voltage compensation rate of the sub-pixel is calculated, when showing picture to be shown
The grid voltage of the sub-pixel is compensated, is that display panel is under the first grayscale value by the current correction of the sub-pixel
The size of current of sub-pixel when white balance, to solve the display of OLED display panel, there are color difference, can not show actual displayed
The problem of effect.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the meter of computer usable program code that the present invention, which can be used at one or more,
The computer journey implemented in calculation machine usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of sequence product.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The function of being specified in present one process of flow chart or more than two one box of process and/or block diagram or more than two boxes
Device.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
The manufacture of device is enabled, which realizes in one side of one process of flow chart or more than two processes and/or block diagram
The function of being specified in frame or more than two boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one process of flow chart or more than two processes and/or box
The step of function of being specified in one box of figure or more than two boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (14)
1. a kind of method for reducing display color difference, which is characterized in that the method is applied to OLED display panel, the method packet
It includes:
First electric current of the display panel when showing picture to be shown is calculated, first electric current is on the display panel
The sum of electric current when all sub-pixels show the picture to be shown；
For the first sub-pixel, corresponding first grayscale value, calculating in the picture to be shown according to first sub-pixel
The display panel is in the second electric current when the white balance under the first grayscale value, and according to the peripheral circuit of the display panel
Resistance value, first electric current and second electric current, calculate the grid voltage compensation rate of first sub-pixel；Wherein,
First sub-pixel is any sub-pixel on the display panel, and second electric current is all sons on the display panel
The sum of electric current when pixel shows first grayscale value；
When showing the picture to be shown, according to the grid voltage compensation rate of first sub-pixel, to the described first sub- picture
The grid voltage of element compensates.
2. the method according to claim 1, wherein calculating the display panel when showing picture to be shown
First electric current, comprising:
For the sub-pixel of any color, counts and be in each grayscale value in the sub-pixel of color described in the picture to be shown
Sub-pixel number；For each grayscale value in each grayscale value, according to the color for being in the grayscale value
Sub-pixel number and when white balance under the grayscale value all colors sub-pixel electric current, obtain institute
State the first electron current of display panel sub-pixel of the color when showing the picture to be shown；
According to the sum of first electron current of the sub-pixel of each color, first electric current is obtained.
3. according to the method described in claim 2, it is characterized in that, according to first electron current of the sub-pixel of each color
The sum of, obtain first electric current, comprising:
Wherein, I1For first electric current, m and n are the resolution ratio of the display panel,For the display surface
First electron current of plate red sub-pixel when showing the picture to be shown, SkIt is described to aobvious in display for the display panel
When showing picture, grayscale value is the number of the red sub-pixel of k, I in all red sub-pixelsRkIt is the display panel in ash
When rank value is the white balance of k, the sum of the electric current of all red sub-pixels；It is being shown for the display panel
First electron current of green sub-pixels, P when the picture to be shownkThe picture to be shown is being shown for the display panel
When, grayscale value is the number of the green sub-pixels of k, I in all green sub-pixelsGkIt is being in grayscale value for the display panel
When the white balance of k, the sum of the electric current of all green sub-pixels；The display panel is described to aobvious in display
First electron current of blue subpixels, Q when showing picturekIt is the display panel when showing the picture to be shown, it is described aobvious
Show the number for the blue subpixels that grayscale value is k in all blue subpixels of panel, IBkIt is the display panel in ash
When rank value is the white balance of k, the sum of the electric current of all blue subpixels.
4. the method according to claim 1, wherein according to first sub-pixel in the picture to be shown
Corresponding first grayscale value calculates the second electric current when the white balance that the display panel is under the first grayscale value, comprising:
For the sub-pixel of any color, according to the corresponding relationship L of the brightness of the sub-pixel of the color and electric currentXGray=a ×
IXGray+ b, first grayscale value calculate the display panel white under first grayscale value by following formula
Second electron current of the sub-pixel of color when balance:
Wherein, IXGrayFor second electron current, second electron current is that the display panel is in first grayscale value
Under white balance when all colors the sum of the electric current of sub-pixel, X indicates the color of sub-pixel, and Gray is first ash
Rank value, IX255For display panel sub-pixel of all colors in the white balance under 255 grayscale electric current it
With, a, b be the color the brightness of sub-pixel and the corresponding relationship of electric current in linear coefficient；
According to the sum of the second electron current of the sub-pixel of each color, second electric current is obtained.
5. the method according to claim 1, wherein the resistance value of the peripheral circuit of the display panel is to pass through
As under type is calculated:
To set the sub-pixel that grayscale value individually lights setpoint color in the display panel, the sub- picture of the setpoint color is obtained
The grid voltage desired value and actual gate voltage value of element；
The display panel is calculated in the white balance under the setting grayscale value, sets face described in the display panel
The third electron current of the sub-pixel of other two kinds of colors other than color；Wherein, in other two kinds of colors any color sub- picture
The third electron current of element is the son of the display panel all colors when showing the white balance under the setting grayscale value
The sum of electric current of pixel；
According to the grid voltage desired value, the actual gate voltage value, other two kinds of colors sub-pixel three son
Electric current calculates the resistance value of the peripheral circuit of the display panel.
6. method according to any one of claims 1 to 5, which is characterized in that according to the peripheral circuit of the display panel
Resistance value, first electric current and second electric current, the grid voltage of first sub-pixel is calculated by following formula
Compensation rate, comprising:
ΔVdata=(I2-I1)×r
Wherein, Δ VdataFor the grid voltage compensation rate of first sub-pixel, I2For second electric current, I1It is described first
Electric current, r are the resistance value of the peripheral circuit of the display panel.
7. a kind of OLED display panel, which is characterized in that the OLED display panel includes:
Processing module, for calculating first electric current of the display panel when showing picture to be shown, first electric current is
The sum of electric current when all sub-pixels show the picture to be shown on the display panel；
And for the first sub-pixel, according to first sub-pixel in the picture to be shown corresponding first grayscale value,
The second electric current when the white balance that the display panel is under the first grayscale value is calculated, and according to the periphery of the display panel
The resistance value of circuit, first electric current and second electric current calculate the grid voltage compensation rate of first sub-pixel；Its
In, first sub-pixel is any sub-pixel on the display panel, and second electric current is institute on the display panel
The sum of electric current when thering is sub-pixel to show first grayscale value；
Compensating module is used for when showing the picture to be shown, right according to the grid voltage compensation rate of first sub-pixel
The grid voltage of first sub-pixel compensates.
8. OLED display panel according to claim 7, which is characterized in that the processing module is specifically used for:
For the sub-pixel of any color, counts and be in each grayscale value in the sub-pixel of color described in the picture to be shown
Sub-pixel number；For each grayscale value in each grayscale value, according to the color for being in the grayscale value
Sub-pixel number and when white balance under the grayscale value all colors sub-pixel electric current, obtain institute
State the first electron current of display panel sub-pixel of the color when showing the picture to be shown；
According to the sum of first electron current of the sub-pixel of each color, first electric current is obtained.
9. OLED display panel according to claim 8, which is characterized in that the processing module is specifically also used to according to such as
Lower formula calculates first electric current:
Wherein, I1For first electric current, m and n are the resolution ratio of the display panel,For the display surface
First electron current of plate red sub-pixel when showing the picture to be shown, SkIt is described to aobvious in display for the display panel
When showing picture, grayscale value is the number of the red sub-pixel of k, I in all red sub-pixelsRkIt is the display panel in ash
When rank value is the white balance of k, the sum of the electric current of all red sub-pixels；It is being shown for the display panel
First electron current of green sub-pixels, P when the picture to be shownkThe picture to be shown is being shown for the display panel
When, grayscale value is the number of the green sub-pixels of k, I in all green sub-pixelsGkIt is being in grayscale value for the display panel
When the white balance of k, the sum of the electric current of all green sub-pixels；The display panel is described to aobvious in display
First electron current of blue subpixels, Q when showing picturekIt is the display panel when showing the picture to be shown, it is described aobvious
Show the number for the blue subpixels that grayscale value is k in all blue subpixels of panel, IBkIt is the display panel in ash
When rank value is the white balance of k, the sum of the electric current of all blue subpixels.
10. OLED display panel according to claim 7, which is characterized in that the processing module is specifically also used to:
For the sub-pixel of any color, according to the corresponding relationship L of the brightness of the sub-pixel of the color and electric currentXGray=a ×
IXGray+ b, first grayscale value calculate the display panel white under first grayscale value by following formula
Second electron current of the sub-pixel of color when balance:
Wherein, IXGrayFor second electron current, second electron current is that the display panel is being in first grayscale
The sum of the electric current of sub-pixel of all colors, L when white balance under valueXGrayFor the color sub-pixel in the first grayscale
Brightness when value, X indicate the color of sub-pixel, and Gray is first grayscale value, IX255255 are being in for the display panel
The sum of the electric current of sub-pixel of all colors when white balance under grayscale, a, b be the sub-pixel of the color brightness with
Linear coefficient in the corresponding relationship of electric current；
According to the sum of the second electron current of the sub-pixel of each color, second electric current is obtained.
11. OLED display panel according to claim 7, which is characterized in that the processing module is also used to:
To set the sub-pixel that grayscale value individually lights setpoint color in the display panel, the sub- picture of the setpoint color is obtained
The grid voltage desired value and actual gate voltage value of element；
The display panel is calculated in the white balance under the setting grayscale value, sets face described in the display panel
The third electron current of the sub-pixel of other two kinds of colors other than color；Wherein, in other two kinds of colors any color sub- picture
The third electron current of element is the son of the display panel all colors when showing the white balance under the setting grayscale value
The sum of electric current of pixel；
According to the grid voltage desired value, the actual gate voltage value, other two kinds of colors sub-pixel second
Electron current calculates the resistance value of the peripheral circuit of the display panel.
12. OLED display panel according to any one of claims 7 to 11, which is characterized in that the processing module tool
Body is used for:
ΔVdata=(I2-I1)×r
Wherein, Δ VdataFor the grid voltage compensation rate of first sub-pixel, I2For second electric current, I1It is described first
Electric current, r are the resistance value of the peripheral circuit of the display panel.
13. a kind of OLED display panel characterized by comprising
Memory, for storing program instruction；
Processor, for calling the program instruction stored in the memory, according to acquisition program execute as claim 1 to
Method described in any one of 6.
14. a kind of computer storage medium, which is characterized in that the computer-readable recording medium storage has computer executable
Instruction, the computer executable instructions are for making the computer execute such as side described in any one of claims 1 to 6
Method.
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Cited By (4)
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| CN110322853A (en) * | 2019-06-19 | 2019-10-11 | 电子科技大学 | A kind of intelligent display drive system neural network based |
| CN110648628A (en) * | 2019-09-29 | 2020-01-03 | 联想(北京)有限公司 | Display processing method, display processing device and electronic equipment |
| CN111445825A (en) * | 2020-03-17 | 2020-07-24 | 福建华佳彩有限公司 | Method and device for improving high and low gray scales |
| CN112201190A (en) * | 2020-10-09 | 2021-01-08 | Oppo（重庆）智能科技有限公司 | Control method, processor, direct-current voltage element, display screen and electronic equipment |
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| CN110322853A (en) * | 2019-06-19 | 2019-10-11 | 电子科技大学 | A kind of intelligent display drive system neural network based |
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| CN111445825A (en) * | 2020-03-17 | 2020-07-24 | 福建华佳彩有限公司 | Method and device for improving high and low gray scales |
| CN112201190A (en) * | 2020-10-09 | 2021-01-08 | Oppo（重庆）智能科技有限公司 | Control method, processor, direct-current voltage element, display screen and electronic equipment |
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| CN109712569B (en) | 2020-12-08 |
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