CN107610642B - A kind of the 3Gamma bearing calibration and system of OLED display module - Google Patents
A kind of the 3Gamma bearing calibration and system of OLED display module Download PDFInfo
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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Abstract
The present invention provides the 3Gamma bearing calibration and system of a kind of OLED display module, this method comprises: the corresponding relationship between the corresponding relationship of S1, the register value of acquisition OLED display module and RGB colour brightness, and red, green, blue tristimulus values；S2, OLED display module is obtained in the first white tristimulus values of setting grayscale, carry out operation according to setting rule and obtain theoretical red tristimulus values, theoretical green tristimulus values, theoretical blue tristimulus values；S3, corresponding red luma, Green brightness, blue luminences are obtained, white picture is corrected；S4, white intrinsic brilliance and white actual color coordinate are acquired, if white intrinsic brilliance and white actual color coordinate do not meet white object brightness and white object chromaticity coordinates, step S2 is executed after then compensating to the first parametric data again, until white intrinsic brilliance and white actual color coordinate meet the requirements.The present invention, which can debug the white picture that OLED display module is shown, makes it meet object brightness and target tristimulus values.
Description
Technical field
The present invention relates to the 3Gamma bearing calibration of technical field of display panel more particularly to a kind of OLED display module and
System.
Background technique
Currently, OLED (Organic Light-Emitting Diode, Organic Light Emitting Diode) panel gradually replaces
TFT-LCD (thin film transistor-liquid crystal display, Thin Film Transistor-LCD) face
Plate becomes mainstream display panel in the market.For OLED compared to TFT-LCD, colour gamut is wider, and color performs better, and OLED
It is usually used on high-end product, therefore the adjustment of the gamma and chromaticity coordinates to OLED is particularly important.Voltage-type compared to TFT-LCD
Liquid crystal drive mode, OLED are the organic light-emitting units drivings of current type.When being combined into white, voltage-type drives rgb pixels
Dynamic and current mode drive is different.It is driven if it is voltage-type, due to the stability of voltage, the pass of white and rgb pixels
System is linear, and is easier to obtain.White and rgb pixels are led to due to the shunting of electric current if it is current mode drive
Relationship is random, is difficult to obtain.So the 3Gamma (gamma and chromaticity coordinates) compared to TFT-LCD is adjusted, the 3Gamma tune of OLED
It saves more difficult, wherein 3Gamma is adjusted is adjusted the Gamma of three kinds of colors of RGB of display module respectively.Mesh
Before, the 3Gamma adjusting method of most OLED or the data of acquisition are more, and the effect for taking long time or debugging is bad, deposits
The colour cast the problems such as.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of 3Gamma bearing calibration grade system of OLED display module,
Debugging correction can be carried out to the white picture that OLED display module is shown, it is made to meet object brightness and target tristimulus values,
And it debugs time-consuming not grow.
A kind of 3Gamma bearing calibration of OLED display module provided by the invention, includes the following steps:
S1, the register value for obtaining OLED display module are with the corresponding relationship of RGB colour brightness as the first corresponding pass
System, and obtain the corresponding red tristimulus values of any one grayscale in 32~255 grayscale, green tristimulus values, blue tristimulus
Value, and obtain the corresponding relationship between the corresponding red tristimulus values of any one grayscale, pair between green tristimulus values
It should be related to, the corresponding relationship between blue tristimulus values, red tristimulus values relationship, green tristimulus respectively as full grayscale
Value relationship, blue tristimulus values relationship, and it is corresponding in any one grayscale white picture to obtain the OLED display module
First white tristimulus values, and will the described first white tristimulus values and the corresponding red tristimulus values of any one grayscale,
Green tristimulus values, blue tristimulus values carry out operation according to setting rule, obtain corresponding first parametric data, wherein complete
The red tristimulus values relationship of grayscale, green tristimulus values relationship, blue tristimulus values relationship are set as the second corresponding relationship, described
Any one grayscale is as setting grayscale；
S2, the OLED display module is obtained in the first white tristimulus values of the setting grayscale, and according to described the
Described first white tristimulus values and the first parametric data are carried out operation according to setting rule, obtained described by two corresponding relationships
Theory red tristimulus values, theoretical green tristimulus values, theoretical blue tristimulus of the OLED display module in the setting grayscale
Value executes step S3；
S3, according to the theoretical red tristimulus values, the theoretical green tristimulus values, the theoretical blue tristimulus values
Corresponding red luma, Green brightness, blue luminences are obtained, further according to the red luma, the Green brightness, the blue
Brightness and first corresponding relationship, are corrected the white picture, execute step S4；
S4, the acquisition OLED display module the setting grayscale white intrinsic brilliance and white actual color coordinate,
Judge whether white intrinsic brilliance and white actual color coordinate meet white object brightness and white object chromaticity coordinates, if not being inconsistent
It closes, then according to the corresponding second white tristimulus values of the OLED display module current picture and the theoretical red tristimulus
Actual measurement parametric data is calculated according to setting rule in value, the theoretical green tristimulus values, the theoretical blue tristimulus values,
And compensate to obtain the second parametric data to the first parametric data according to the actual measurement parametric data, and by the second parametric data
As executing step S2 again after the first parametric data, until to meet white object bright for white intrinsic brilliance and white actual color coordinate
Degree and white object chromaticity coordinates.
Preferably, in step S3, according to the red luma, the Green brightness, the blue luminences and described
One corresponding relationship is corrected the white picture, specifically:
It is obtained pair according to the red luma, the Green brightness, the blue luminences and first corresponding relationship
The driving IC of the OLED display module is written in the RGB register value by the RGB register value answered；
The register of the OLED display module is written in the RGB register value by the driving IC, is posted by described
Storage controls the OLED display module and is corrected to the white picture.
Preferably, further include following step:
The OLED display module is obtained in the corresponding white object brightness of the setting grayscale and white object chromaticity coordinates；
Further include following step:
Using a grayscale adjacent with the setting grayscale as the setting grayscale, step S2 is executed.4, it is wanted according to right
The 3Gamma bearing calibration of OLED display module described in asking 1, which is characterized in that posting for OLED display module is obtained in step S1
Storage value and the corresponding relationship of RGB colour brightness are specifically included as the first corresponding relationship:
Obtain the register value and its corresponding data voltage and to tie up a RGB color bright of the OLED display module
Degree, and tie up a RGB colour brightness according to described the corresponding parameter T of binding grayscale is calculated, wherein T=(Lx-L0)/
(L255-L0), L255, L0, Lx are respectively the OLED display module in 255 grayscale, 0 grayscale and the corresponding RGB of x grayscale
Colour brightness, 0≤x≤255；
Data voltage V and ginseng are constructed using linear interpolation method or parabolic interpolation according to data voltage, parameter T
Corresponding relationship between number T, according to the corresponding relationship and data voltage V and the OLED between data voltage V and parameter T
Corresponding relationship between the register value of display module obtains first corresponding relationship.
Preferably, white object brightness meets gamma curve requirement, and the Gamma value range of the gamma curve are as follows:
2.0~2.4；
Further include following step:
According to the Gamma value of gamma curve described in 0 grayscale and the corresponding white object luminance acquisition of 255 grayscale；
The white object brightness of each grayscale in 0~255 grayscale is obtained according to the gamma curve.
Preferably, second corresponding relationship are as follows:
The red tristimulus values is Xr, Yr, Zr, and the green tristimulus values is Xg, Yg, Zg, the blue tristimulus
Value is Xb, Yb, Zb, in which:
Xr=A*Yr, Zr=B*Yr, Xg=C*Yg, Zg=D*Yg, Xb=E*Yb, Zb=F*Yb, A, B, C, D, E, F are big
In 0, and the corresponding A of different grayscale is identical, B is identical, C is identical, D is identical, E is identical, F is identical.
Preferably, in step S2 according to second corresponding relationship, by the described first white tristimulus values and selection with
First parametric data carries out operation according to setting rule, obtains the OLED display module in the theory of the setting grayscale
Red tristimulus values, theoretical green tristimulus values, theoretical blue tristimulus values, specifically:
The theoretical red tristimulus values, the theoretical green tristimulus values, the theoretical blue tristimulus values are by asking
Following equations are solved to obtain:
Xw=u* (Xr+Xg+Xb), Yw=v* (Yr+Yg+Yb), Zw=w* (Zr+Zg+Zb)；
Wherein, the theoretical red tristimulus values is Xr, Yr, Zr, and the theoretical green tristimulus values is Xg, Yg, Zg, institute
Stating theoretical blue tristimulus values is Xb, Yb, Zb, and the described first white tristimulus values is Xw, Yw, Zw, the first parametric data be u,
v、w。
Preferably, in step S4 according to the corresponding second white tristimulus values of the OLED display module current picture and
The theoretical red tristimulus values, the theoretical green tristimulus values, the theoretical blue tristimulus values are according to setting rule meter
Calculation obtains actual measurement parametric data, specifically:
According to the described second white tristimulus values, the actual measurement parametric data is obtained by solving following equations:
Xw '=u ' * (Xr+Xg+Xb), Yw '=v ' * (Yr+Yg+Yb), Zw '=w ' * (Zr+Zg+Zb), wherein the reality
Survey parametric data is u ', v ', w ', and the described second white tristimulus values is Xw ', Yw ', Zw '；
The first parametric data is compensated according to the actual measurement parametric data in step S4 to obtain the second parametric data, is had
Body are as follows:
According to the actual measurement parametric data and the first parametric data, the second parameter number is obtained by solving following equations
According to:
U "=(u+u ')/2, v "=(v '+v)/2, w "=(w '+w)/2, wherein the second parametric data is u ", v ", w ".
The present invention also provides a kind of 3Gamma of OLED display module to correct system, comprising: optical measurement probe, operation control
Molding block, jig；
The optical measurement probe, and the operation control module communication connection, for acquiring the light of OLED display module
Parameter information is learned, and by the optical parameter information conveyance to the operation control module, wherein the optical parameter packet
The OLED display module is included in the corresponding white tristimulus values of setting grayscale, red tristimulus values, green tristimulus values, blue
Tristimulus values；
The operation control module, and the jig communication connection for exporting picture signal to the jig, and control
The optical measurement probe acquires the optical parameter information, also according to the second corresponding relationship, by white tristimulus values and selection
The first parametric data corresponding with white tristimulus values according to setting rule carry out operation, obtain the OLED display module and exist
The red tristimulus values of theory, theoretical green tristimulus values, the theoretical blue tristimulus values of the setting grayscale, and according to the reason
Corresponding red luma, green is obtained by red tristimulus values, the theoretical green tristimulus values, the theoretical blue tristimulus values
Colour brightness, blue luminences, further according to the red luma, the Green brightness, the blue luminences and the first corresponding relationship,
Corresponding RGB register value is exported to the jig；
Wherein, first corresponding relationship is that the register value of the OLED display module is corresponding with RGB colour brightness
Relationship, second corresponding relationship are the red tristimulus values relationship of full grayscale, green tristimulus values relationship, blue tristimulus values
Relationship, the red tristimulus values relationship of any one grayscale, green tristimulus values relationship, blue tristimulus values are closed in the full grayscale
Corresponding relationship, green tristimulus between system, and the red tristimulus values of any one grayscale in 32~255 grayscale that measure in advance
The corresponding relationship between corresponding relationship, blue tristimulus values between value respectively corresponds identical；
The jig, for receiving the picture signal and the RGB register value, and the picture signal is defeated
It send to the OLED display module, controls the OLED display module and show corresponding picture, also by the RGB register
The driving IC of the OLED display module is written in value, and the OLED is written in the RGB register value by the driving IC
The register of display module is corrected with the white picture by OLED display module described in the register pair；
Wherein, the optical parameter information further includes that the OLED display module is practical bright in the white of the setting grayscale
Degree and white actual color coordinate；
The operation control module, is also used to judge whether white intrinsic brilliance and white actual color coordinate meet white mesh
Brightness and white object chromaticity coordinates are marked, if not meeting, according to the white tristimulus values of the OLED display module and described
Theoretical red tristimulus values, the theoretical green tristimulus values, the theoretical blue tristimulus values are calculated according to setting rule
To actual measurement parametric data, and the first parametric data is compensated to obtain the second parametric data according to the actual measurement parametric data,
And using the second parametric data as the first parametric data.
Preferably, white object brightness meets gamma curve requirement, and the Gamma value range of the gamma curve are as follows:
2.0~2.4；
The white object brightness of each grayscale is obtained according to the gamma curve, and the Gamma value of the gamma curve is according to 0
Grayscale and the corresponding white object brightness of 255 grayscale obtain.
The invention has the following beneficial effects: by obtaining OLED display module in the first white of setting grayscale
Tristimulus values, and according to the second corresponding relationship, the first white tristimulus values and the first parametric data are carried out according to setting rule
Operation obtains OLED display module in the red tristimulus values of the theory of setting grayscale, theoretical green tristimulus values, theoretical blue three
Values；It is obtained further according to theoretical red tristimulus values, theoretical green tristimulus values, theoretical blue tristimulus values corresponding red
Color, green, blue luminences, by red, green, blue luminences and the available corresponding register value of the first corresponding relationship,
It is corrected by white picture of the register value to OLED display module.Further according to the shown picture of OLED display module
It is corrected in face of the first parametric data, until the brightness and tristimulus values satisfaction of the white picture shown in OLED display module
It is required that.The present invention persistently can carry out debugging correction to the shown white picture of OLED display module, show that it finally
White picture meet object brightness and target tristimulus values.And the present invention at most only needs to adopt in correction debugging process
Collect the white brightness and white of one group of red tristimulus values, green tristimulus values, blue tristimulus values and OLED display module
Chromaticity coordinates, and white tristimulus values, the data of acquisition are not very much, therefore the time-consuming debugged also is not grown.
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 3Gamma bearing calibration of OLED display module provided by the invention.
Fig. 2 is the VT curve graph between the data voltage V and parameter T of OLED display module provided by the invention.
Fig. 3 is the flow chart of the 3Gamma bearing calibration of OLED display module in another embodiment provided by the invention.
Fig. 4 is the functional block diagram of the 3Gamma correction system of OLED display module provided by the invention.
Specific embodiment
The present invention provides a kind of 3Gamma bearing calibration of OLED display module, as shown in Figure 1, this method includes following steps
It is rapid:
S1, the register value for obtaining OLED display module are with the corresponding relationship of RGB colour brightness as the first corresponding pass
System, and obtain the corresponding red tristimulus values of any one grayscale in 32~255 grayscale, green tristimulus values, blue tristimulus
Value, and according to the group red tristimulus values, green tristimulus values, blue tristimulus values, it is corresponding red to obtain any one grayscale
The corresponding relationship between corresponding relationship, green tristimulus values between color tristimulus values, the corresponding pass between blue tristimulus values
System, by the corresponding relationship between the corresponding red tristimulus values of any one grayscale, the corresponding relationship between green tristimulus values,
Corresponding relationship between blue tristimulus values respectively as the red tristimulus values relationship of full grayscale, green tristimulus values relationship,
Blue tristimulus values relationship, and OLED display module is obtained in the corresponding first white tristimulus of any one grayscale white picture
Value, and by the corresponding red tristimulus values of the first white tristimulus values and any one grayscale, green tristimulus values, blue tristimulus
Value carries out operation according to setting rule, obtains corresponding first parametric data, wherein the red tristimulus values relationship of full grayscale,
Green tristimulus values relationship, blue tristimulus values relationship are set as the second corresponding relationship, and any one grayscale is as setting grayscale.It is excellent
Selection of land, any one grayscale in step S1 can be 255 grayscale.
S2, OLED display module is obtained in the first white tristimulus values of setting grayscale, and according to the second corresponding relationship, it will
First white tristimulus values and the first parametric data obtain OLED display module in setting grayscale according to setting rule progress operation
The red tristimulus values of theory, theoretical green tristimulus values, theoretical blue tristimulus values, execute step S3.
S3, obtained according to theoretical red tristimulus values, theoretical green tristimulus values, theoretical blue tristimulus values it is corresponding red
Colour brightness, Green brightness, blue luminences, it is right further according to red luma, Green brightness, blue luminences and the first corresponding relationship
White picture is corrected, and executes step S4.
S4, acquisition OLED display module judge white in the white intrinsic brilliance and white actual color coordinate of setting grayscale
Whether intrinsic brilliance and white actual color coordinate meet white object brightness and white object chromaticity coordinates, if not meeting, basis
The corresponding second white tristimulus values of OLED display module current picture and theoretical red tristimulus values, theoretical green tristimulus
Actual measurement parametric data is calculated according to setting rule in value, theoretical blue tristimulus values, and according to actual measurement parametric data to first
Parametric data compensates to obtain the second parametric data, and using the second parametric data as executing step again after the first parametric data
S2, until white intrinsic brilliance and white actual color coordinate meet white object brightness and white object chromaticity coordinates.
Further, in step S3, according to red luma, Green brightness, blue luminences and the first corresponding relationship, dialogue
Color picture is corrected, specifically:
Corresponding RGB register is obtained according to red luma, Green brightness, blue luminences and the first corresponding relationship
Value, by the driving IC of RGB register value write-in OLED display module；Here RGB register value that is to say register
Input value.
It drives IC by the register of RGB register value write-in OLED display module, OLED is controlled by register and is shown
Mould group is corrected white picture.
Further, the 3Gamma bearing calibration of OLED display module further includes following step:
OLED display module is obtained in the corresponding white object brightness of setting grayscale and white object chromaticity coordinates.
The 3Gamma bearing calibration of OLED display module further includes following step:
Using a grayscale adjacent with setting grayscale as setting grayscale, step S2 is executed.It should be noted that setting here
Determining grayscale is to tie up a grayscale, and a grayscale adjacent with the grayscale that sets up an office refers to that adjacent one ties up a grayscale.Driving IC's ties up on a little
Corresponding binding has register, and each register pair answers one to tie up a grayscale, for example, tie up a grayscale be 255,245,235,
225 ..., 15,5, set a register every 10 grayscale, if setting grayscale as 255 ranks, 255 ranks it is adjacent one
Grayscale is then 245 grayscale, if setting grayscale as 235 ranks, the adjacent grayscale of 235 ranks is 225 ranks and 245 ranks.Further
Ground obtains the register value of OLED display module in step S1 with the corresponding relationship of RGB colour brightness as the first corresponding pass
System, specifically includes:
It obtains the register value of OLED display module and its corresponding data voltage and ties up a RGB colour brightness, and
The corresponding parameter T of binding grayscale is calculated according to a RGB colour brightness is tied up, wherein T=(Lx-L0)/(L255-L0),
L255, L0, Lx are respectively OLED display module in 255 grayscale, 0 grayscale and the corresponding RGB colour brightness of x grayscale, and 0≤x≤
255.Wherein, tying up a RGB colour brightness is to tie up the RGB brightness of the corresponding OLED display module of a grayscale.
Data voltage V and ginseng are constructed using linear interpolation method or parabolic interpolation according to data voltage, parameter T
Corresponding relationship between number T, according between data voltage V and parameter T corresponding relationship and data voltage V and OLED show
Corresponding relationship between the register value of mould group obtains the first corresponding relationship.Wherein, data voltage V that is to say that OLED shows mould
The Source voltage of the driving IC of group.
Further, white object brightness meets gamma curve requirement, and the Gamma value range of gamma curve are as follows: 2.0
~2.4.
The 3Gamma bearing calibration of OLED display module further includes following step:
According to the Gamma value of 0 grayscale and the corresponding white object luminance acquisition gamma curve of 255 grayscale；
The white object brightness of each grayscale in 0~255 grayscale is obtained according to gamma curve.
Further, the second corresponding relationship are as follows:
Red tristimulus values be Xr, Yr, Zr, green tristimulus values be Xg, Yg, Zg, blue tristimulus values be Xb, Yb, Zb,
Wherein:
Xr=A*Yr, Zr=B*Yr, Xg=C*Yg, Zg=D*Yg, Xb=E*Yb, Zb=F*Yb, A, B, C, D, E, F are big
In 0, and the corresponding A of different grayscale is identical, B is identical, C is identical, D is identical, E is identical, F is identical.
Further, in step S2 according to the second corresponding relationship, by the first white tristimulus values and that chooses join with first
It measures data and carries out operation according to setting rule, obtain OLED display module in the theory of setting grayscale red tristimulus values, theory
Green tristimulus values, theoretical blue tristimulus values, specifically:
Theoretical red tristimulus values, theoretical green tristimulus values, theoretical blue tristimulus values are obtained by solving following equations
It arrives:
Xw=u* (Xr+Xg+Xb), Yw=v* (Yr+Yg+Yb), Zw=w* (Zr+Zg+Zb)；
Wherein, theoretical red tristimulus values is Xr, Yr, Zr, and theoretical green tristimulus values is Xg, Yg, Zg, theoretical blue three
Values is Xb, Yb, Zb, and the first white tristimulus values is Xw, Yw, Zw, and the first parametric data is u, v, w.
Specifically, for example, Xr=A*Yr, Zr=B*Yr, Xg=C*Yg, Zg=D*Yg, Xb=E*Yb, Zb=F*Yb.?
A, B, C, D, E, F, which can be regarded as, in the same OLED display module immobilizes, and therefore, can choose appointing for OLED display module
The corresponding red, green of a grayscale of anticipating, blue tristimulus values, solve the value of A, B, C, D, E, F.
Xw, Yw, Zw of above-mentioned equation can be measured and be obtained, therefore, after the first parametric data is u, v, w determining, Yr,
Yg, Yb can also solve to obtain.Red, green, blue luminences are characterized by Yr, Yg, Yb again.
Further, according to the corresponding second white tristimulus values of OLED display module current picture and reason in step S4
Actual measurement parameter is calculated according to setting rule by red tristimulus values, theoretical green tristimulus values, theoretical blue tristimulus values
Data, specifically:
According to the second white tristimulus values, actual measurement parametric data is obtained by solving following equations:
Xw '=u ' * (Xr+Xg+Xb), Yw '=v ' * (Yr+Yg+Yb), Zw '=w ' * (Zr+Zg+Zb), wherein actual measurement ginseng
Amount data are u ', v ', w ', and the second white tristimulus values is Xw ', Yw ', Zw '；.
The first parametric data is compensated to obtain the second parametric data according to actual measurement parametric data in step S4, specifically
Are as follows:
According to actual measurement parametric data and the first parametric data, the second parametric data is obtained by solving following equations:
U "=(u+u ')/2, v "=(v '+v)/2, w "=(w '+w)/2, wherein the second parametric data is u ", v ", w ".
Certainly, can also include the following steps: in step S4
The white tristimulus values of acquisition second, or the second white tristimulus values is calculated according to white actual color coordinate.
Wherein, the calculation of white actual color coordinate and white tristimulus values is as follows:
X=X/ (X+Y+Z), y=Y/ (X+Y+Z), z=Z/ (X+Y+Z), x+y+z=1；Wherein, x, y, z is that white color is sat
Mark, X, Y, Z are corresponding white tristimulus values.
In another embodiment that bearing calibration of the invention provides, include the following steps:
The first step, first acquire each grayscale of OLED display module RGB colour brightness, with obtain RGB register with it is red
The relationship of turquoise colour brightness.As shown in Fig. 2, shown in Fig. 2 is the VT curve of a certain grayscale in OLED display module, wherein V is
The Source voltage value (driving the data voltage of IC) of IC is driven in OLED mould group, unit is volt, and T is obtained according to the following formula
It arrives: T (x grayscale)=(Lx-L0)/(L255-L0).VT curve per a piece of OLED display module is different, and with a piece of
The corresponding VT curve of the RGB register of display module is not also identical, so need to be red for acquiring per a piece of OLED display module
The brightness of turquoise each grayscale can obtain the VT curve equation of RGB register.This general VT curve uses multiple first-order equations,
Or second-order equation simulates its curve equation, that is, utilizes linear interpolation method or parabolic interpolation, obtain between VT
Corresponding relationship.Wherein, V is the Source voltage value of the driving IC of OLED mould group, the relationship of register value corresponding with driving IC
It is known that so exact relationship in available OLED display module between RGB register and RGB colour brightness.
Second step determines the object brightness and target color coordinates of each grayscale (0~255 grayscale) of white.The brightness of each grayscale
Gamma (Gamma) curve requirement of client's proposition need to be met, Gamma value, in this way can be according to 255 usually within 2.2 ± 0.1
Grayscale and 0 gray-scale intensity determine the object brightness of each grayscale, and the color that the target color coordinates of each grayscale should meet client's proposition is sat
Mark requires, such as the chromaticity coordinates of customer requirement is (x, y), then target color coordinates can be (x ± 0.005, y ± 0.005).
Third step constructs the algoritic module of a kind of feedback compensation and verifying, as shown in figure 3, for algoritic module, it
Input variable be a certain grayscale white brightness and white chromaticity coordinates (or white tristimulus values), export the result is that calculating
The RGB colour brightness value arrived, special parameter are the relational expressions of the distinctive RGB synthesis white of OLED display module.General
RGB color synthesize in white relationship, red tristimulus values Xr, Yr, Zr, green tristimulus values Xg, Yg, Zg, blue tristimulus
The corresponding summation of value Xb, Yb, Zb three is equal to tristimulus values Xw, Yw, Zw of white, and calculation formula is as follows:
Xw=Xr+Xg+Xb, Yw=Yr+Yg+Yb, Zw=Zr+Zg+Zb；
But in OLED display module, above formula is simultaneously invalid.We set:
Xw=u* (Xr+Xg+Xb)；Yw=v* (Yr+Yg+Yb)；Zw=w* (Zr+Zg+Zb)；
One group of parameter (u, v, w) is employed herein to characterize the relational expression of RGB synthesis white, the analysis found that, no
Not identical in same grayscale with the parameter (u, v, w) of OLED display module, the parameter (u, v, w) with a piece of OLED display module exists
Different grayscale are not also identical, meanwhile, change the proportion of RGB, parameter (u, v, w) is not also identical, and adjusts chromaticity coordinates (x, y)
Essence, exactly change the proportion of RGB, thus parameter (u, v, w) can also change with the adjustment of chromaticity coordinates.Uniquely
Rule be that corresponding parameter (u, v, w), is almost presented linear relationship between similar grayscale.
Based on this, this programme first uses (u, the v, w) of one group of setting, using algoritic module, obtains the brightness value of RGB,
The relationship between the RGB register and brightness of first step building is recycled, obtains corresponding register value, then by register
Be worth write driver IC, and acquire the optical parameter data of OLED display module, judge OLED display module actual color coordinate and
Whether brightness meets the requirements, and correction is completed if meeting, if conditions are not met, the optical parameter data of actual acquisition is calculated
The parameter (u ', v ', w ') arrived, compensates with the parameter (u, v, w) assumed originally, obtain one group of new parameter (u ", v ",
W "), parameter (u ", v ", w ") at this time will be more nearly with actual.It, finally can be accurate by this compensation cycle algorithm
Completion adjustment.
Because the parameter (u, v, w) between similar grayscale, is almost presented linear relationship.So we can using from
According to fixed step-by-step system in full grayscale (0~255 grayscale), pick out certain grayscale carry out above the first step to the essence of third step
Really adjustment, and its accurate parameter (u, v, w) value is obtained, parameter (u, v, the w) value of other grayscale is according to known to adjacent grayscale
Parameter value carry out linearly calculate.We can also carry out essence using the method for first three step to full grayscale (0~255 grayscale)
Really adjustment, the corresponding initial parameter value (u, v, w) of next grayscale, the parameter value obtained using upper one adjacent grayscale debugging
(u, v, w) is calculated, it is also ensured that the adjustment of minimum number.
4th step, by the drive of the write-in OLED display module of register value corresponding to obtained full grayscale (0~255 grayscale)
Dynamic IC, is verified.
The present invention also provides a kind of 3Gamma of OLED display module to correct system, as shown in figure 4, the system includes: light
Learn measuring probe 1, operation control module 2, jig 3.Wherein, OLED display module 4 includes register, driving IC, drives IC
For register value to be written to register, brightness and the chromaticity coordinates of the display screen of OLED display module 4 are controlled by register.It posts
Storage includes the red register for controlling OLED display module 4 and being displayed in red, and control OLED display module 4 shows the green deposit of green
Device, the blue register that control OLED display module 4 is displayed in blue.
Optical measurement probe 1, and 2 communication connection of operation control module, for acquiring the optical parameter of OLED display module 4
Information, and by optical parameter information conveyance to operation control module 2, wherein optical parameter information includes that OLED display module 4 exists
Setting grayscale is displayed in white white tristimulus values corresponding to picture, red tristimulus values, green tristimulus values, blue tristimulus
Value.
Operation control module 2 and 3 communication connection of jig for exporting picture signal to jig 3, and control optical measurement spy
First 1 acquisition optical parameter information, also according to the second corresponding relationship, by white tristimulus values and selection and white tristimulus values pair
The first parametric data answered carries out operation according to setting rule, obtains OLED display module 4 in the theory red three of setting grayscale
Values, theoretical green tristimulus values, theoretical blue tristimulus values, and pierced according to theoretical red tristimulus values, theoretical green three
Swash the blue tristimulus values of value, theory and obtain corresponding red luma, Green brightness, blue luminences, further according to red luma, green
Brightness, blue luminences and the first corresponding relationship export corresponding RGB register value to jig 3.Wherein, picture signal packet
Include danger signal, green, blue signal, white signal.
Wherein, the first corresponding relationship is the register value of OLED display module 4 and the corresponding relationship of RGB colour brightness, the
Two corresponding relationships are the red tristimulus values relationship of full grayscale, green tristimulus values relationship, blue tristimulus values relationship, full grayscale
In any one grayscale red tristimulus values relationship, green tristimulus values relationship, blue tristimulus values relationship, with 32~255 ashes
The corresponding relationship between corresponding relationship, green tristimulus values in rank between the red tristimulus values of any one grayscale, blue three
Corresponding relationship between values respectively corresponds identical.For example, the red three of the red tristimulus values relationship of 1 grayscale and 35 grayscale
Values relationship is identical, and the green tristimulus values relationship of 1 grayscale and the green tristimulus values relationship of 35 grayscale are identical, 1 grayscale
Blue tristimulus values relationship is identical as the blue tristimulus values relationship of 35 grayscale.
Picture signal is delivered to OLED display module for receiving picture signal and RGB register value by jig 3
4, control OLED display module 4 shows corresponding picture, also by the driving of RGB register value write-in OLED display module 4
The register of OLED display module 4 is written, by driving IC to show by register pair OLED in RGB register value by IC
The white picture of mould group 4 is corrected.Jig 3 controls respectively according to danger signal, green, blue signal, white signal
OLED display module 4 is displayed in red picture, green picture, blue picture, white picture.
Wherein, optical parameter information further includes that OLED display module 4 is real in the white intrinsic brilliance and white of setting grayscale
Border chromaticity coordinates.
Operation control module 2, is also used to judge whether white intrinsic brilliance and white actual color coordinate meet white object
Brightness and white object chromaticity coordinates, if not meeting, according to the white tristimulus values of OLED display module 4 and theoretical red three
Actual measurement parametric data, and root is calculated according to setting rule in values, theoretical green tristimulus values, theoretical blue tristimulus values
It factually surveys parametric data the first parametric data is compensated to obtain the second parametric data, and using the second parametric data as first
Parametric data.
Further, white object brightness meets gamma curve requirement, and the Gamma value range of gamma curve are as follows: 2.0
~2.4.
The white object brightness of each grayscale is obtained according to gamma curve, the Gamma value of gamma curve according to 0 grayscale and
The corresponding white object brightness of 255 grayscale obtains.
In conclusion the present invention proposes a kind of 3Gamma bearing calibration grade system of OLED display module, it is able to achieve lime
The accurately and quickly adjustment of rank (white picture of 0~255 grayscale) chromaticity coordinates and gamma curve, make its meet object brightness and
Target color coordinates.First obtain the relationship of the register of control red green and blue color and the RGB colour brightness of OLED display module.
The object brightness and target color coordinates of lime rank (0~255 grayscale) are determined again.The method constructed using this programme, can basis
The white object brightness of each grayscale and white chromaticity coordinates, obtaining the corresponding register value of each grayscale, (including control OLED is aobvious
The register value for showing module displays red shows the register value of green, the register value being displayed in blue).Finally, by register
Value write-in register, verifies white chromaticity coordinates and gamma curve (i.e. whether white object brightness meets gamma curve).
The speed that the Gamma value of the gamma curve of OLED display module can be controlled within 2.2 ± 0.03, and debugged by the present invention
Degree can meet production requirement, can most complete entire automatic debugging process at one minute or so fastly.
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 3Gamma bearing calibration of OLED display module, which is characterized in that include the following steps:
The corresponding relationship of S1, the register value for obtaining OLED display module and RGB colour brightness as the first corresponding relationship, with
And the corresponding red tristimulus values of any one grayscale in 32~255 grayscale, green tristimulus values, blue tristimulus values are obtained, and
Obtain the corresponding relationship between the corresponding red tristimulus values of any one grayscale, corresponding between green tristimulus values is closed
Corresponding relationship between system, blue tristimulus values is closed respectively as red tristimulus values relationship, the green tristimulus values of full grayscale
System, blue tristimulus values relationship, and the OLED display module is obtained in any one grayscale white picture corresponding first
White tristimulus values, and by the described first white tristimulus values and any one grayscale corresponding red tristimulus values, green
Tristimulus values, blue tristimulus values carry out operation according to setting rule, obtain corresponding first parametric data, wherein full grayscale
Red tristimulus values relationship, green tristimulus values relationship, blue tristimulus values relationship be set as the second corresponding relationship, it is described any
One grayscale is as setting grayscale；
S2, the OLED display module is obtained in the first white tristimulus values of the setting grayscale, and according to described second pair
It should be related to, the described first white tristimulus values and the first parametric data are subjected to operation according to setting rule, obtain the OLED
Display module is held in the red tristimulus values of theory, theoretical green tristimulus values, theoretical blue tristimulus values of the setting grayscale
Row step S3；
S3, it is obtained according to the theoretical red tristimulus values, the theoretical green tristimulus values, the theoretical blue tristimulus values
Corresponding red luma, Green brightness, blue luminences, further according to the red luma, the Green brightness, the blue luminences
And first corresponding relationship, the white picture is corrected, step S4 is executed；
The white intrinsic brilliance and white actual color coordinate of S4, the acquisition OLED display module in the setting grayscale, judgement
Whether white intrinsic brilliance and white actual color coordinate meet white object brightness and white object chromaticity coordinates, if not meeting,
According to the corresponding second white tristimulus values of the OLED display module current picture and the theoretical red tristimulus values, institute
It states theoretical green tristimulus values, the theoretical blue tristimulus values and actual measurement parametric data, and root is calculated according to setting rule
Compensate to obtain the second parametric data to the first parametric data according to the actual measurement parametric data, and using the second parametric data as
Step S2 is executed after first parametric data again, until white intrinsic brilliance and white actual color coordinate meet white object brightness and
White object chromaticity coordinates.
2. the 3Gamma bearing calibration of OLED display module according to claim 1, which is characterized in that in step S3, root
According to the red luma, the Green brightness, the blue luminences and first corresponding relationship, to the white picture into
Row correction, specifically:
It is obtained according to the red luma, the Green brightness, the blue luminences and first corresponding relationship corresponding
The driving IC of the OLED display module is written in the RGB register value by RGB register value；
The register of the OLED display module is written in the RGB register value by the driving IC, passes through the register
The OLED display module is controlled to be corrected the white picture.
3. the 3Gamma bearing calibration of OLED display module according to claim 2, which is characterized in that further include following steps
It is rapid:
The OLED display module is obtained in the corresponding white object brightness of the setting grayscale and white object chromaticity coordinates；
Further include following step:
Using a grayscale adjacent with the setting grayscale as the setting grayscale, step S2 is executed.
4. the 3Gamma bearing calibration of OLED display module according to claim 1, which is characterized in that obtained in step S1
The register value of OLED display module and the corresponding relationship of RGB colour brightness are specifically included as the first corresponding relationship:
It obtains the register value of the OLED display module and its corresponding data voltage and ties up a RGB colour brightness, and
It ties up a RGB colour brightness according to described the corresponding parameter T of binding grayscale is calculated, wherein T=(Lx-L0)/(L255-
L0), L255, L0, Lx are respectively the OLED display module in 255 grayscale, 0 grayscale and the corresponding RGB colour brightness of x grayscale,
0≤x≤255；
Data voltage V and parameter T is constructed using linear interpolation method or parabolic interpolation according to data voltage, parameter T
Between corresponding relationship, according between data voltage V and parameter T corresponding relationship and data voltage V and the OLED show
Corresponding relationship between the register value of mould group obtains first corresponding relationship.
5. the 3Gamma bearing calibration of OLED display module according to claim 1, which is characterized in that
White object brightness meets gamma curve requirement, and the Gamma value range of the gamma curve are as follows: 2.0~2.4；Also
Include the following steps:
According to the Gamma value of gamma curve described in 0 grayscale and the corresponding white object luminance acquisition of 255 grayscale；
The white object brightness of each grayscale in 0~255 grayscale is obtained according to the gamma curve.
6. the 3Gamma bearing calibration of OLED display module according to claim 1, which is characterized in that described second is corresponding
Relationship are as follows:
The red tristimulus values is Xr, Yr, Zr, and the green tristimulus values is Xg, Yg, Zg, and the blue tristimulus values is
Xb, Yb, Zb, in which:
Xr=A*Yr, Zr=B*Yr, Xg=C*Yg, Zg=D*Yg, Xb=E*Yb, Zb=F*Yb, A, B, C, D, E, F are all larger than 0,
And the corresponding A of difference grayscale is identical, B is identical, C is identical, D is identical, E is identical, F is identical.
7. the 3Gamma bearing calibration of OLED display module according to claim 6, which is characterized in that
According to second corresponding relationship in step S2, by the described first white tristimulus values and selection and first parameter
Data carry out operation according to setting rule, obtain the OLED display module in the red tristimulus of theory of the setting grayscale
Value, theoretical green tristimulus values, theoretical blue tristimulus values, specifically:
Under the theoretical red tristimulus values, the theoretical green tristimulus values, the theoretical blue tristimulus values are by solving
Equation is stated to obtain:
Xw=u* (Xr+Xg+Xb), Yw=v* (Yr+Yg+Yb), Zw=w* (Zr+Zg+Zb)；
Wherein, the theoretical red tristimulus values is Xr, Yr, Zr, and the theoretical green tristimulus values is Xg, Yg, Zg, the reason
It is Xb, Yb, Zb by blue tristimulus values, the described first white tristimulus values is Xw, Yw, Zw, and the first parametric data is u, v, w.
8. the 3Gamma bearing calibration of OLED display module according to claim 7, which is characterized in that basis in step S4
The corresponding second white tristimulus values of OLED display module current picture and the theoretical red tristimulus values, the reason
Actual measurement parametric data is calculated according to setting rule by green tristimulus values, the theoretical blue tristimulus values, specifically:
According to the described second white tristimulus values, the actual measurement parametric data is obtained by solving following equations:
Xw '=u ' * (Xr+Xg+Xb), Yw '=v ' * (Yr+Yg+Yb), Zw '=w ' * (Zr+Zg+Zb), wherein the actual measurement ginseng
Amount data are u ', v ', w ', and the described second white tristimulus values is Xw ', Yw ', Zw '；
The first parametric data is compensated to obtain the second parametric data according to the actual measurement parametric data in step S4, specifically
Are as follows:
According to the actual measurement parametric data and the first parametric data, the second parametric data is obtained by solving following equations:
U "=(u+u ')/2, v "=(v '+v)/2, w "=(w '+w)/2, wherein the second parametric data is u ", v ", w ".
9. a kind of 3Gamma of OLED display module corrects system characterized by comprising optical measurement probe, operation control
Module, jig；
The optical measurement probe, and the operation control module communication connection, for acquiring the Optical Parametric of OLED display module
Number information, and by the optical parameter information conveyance to the operation control module, wherein the optical parameter information includes institute
OLED display module is stated to pierce in the corresponding white tristimulus values of setting grayscale, red tristimulus values, green tristimulus values, blue three
Swash value；
The operation control module, and the jig communication connection, for exporting picture signal to the jig, and described in controlling
Optical measurement probe acquires the optical parameter information, also according to the second corresponding relationship, by white tristimulus values and selection with
Corresponding first parametric data of white tristimulus values carries out operation according to setting rule, obtains the OLED display module described
The red tristimulus values of theory, theoretical green tristimulus values, theoretical blue tristimulus values of grayscale are set, and red according to the theory
Color tristimulus values, the theoretical green tristimulus values, that the theoretical blue tristimulus values obtains corresponding red luma, green is bright
Degree, blue luminences, further according to the red luma, the Green brightness, the blue luminences and the first corresponding relationship, output
Corresponding RGB register value is to the jig；
Wherein, first corresponding relationship is the register value pass corresponding with RGB colour brightness of the OLED display module
System, second corresponding relationship are that the red tristimulus values relationship, green tristimulus values relationship, blue tristimulus values of full grayscale are closed
It is that the red tristimulus values relationship of any one grayscale, green tristimulus values relationship, blue tristimulus values are closed in the full grayscale
Corresponding relationship, green tristimulus between system, and the red tristimulus values of any one grayscale in 32~255 grayscale that measure in advance
The corresponding relationship between corresponding relationship, blue tristimulus values between value respectively corresponds identical；
The jig is delivered to for receiving the picture signal and the RGB register value, and by the picture signal
The OLED display module controls the OLED display module and shows corresponding picture, also writes the RGB register value
The RGB register value is written the OLED by the driving IC and shown by the driving IC for entering the OLED display module
The register of mould group is corrected with the white picture by OLED display module described in the register pair；
Wherein, the optical parameter information further include the OLED display module the setting grayscale white intrinsic brilliance and
White actual color coordinate；
It is bright to be also used to judge whether white intrinsic brilliance and white actual color coordinate meet white object for the operation control module
Degree and white object chromaticity coordinates, if not meeting, according to the white tristimulus values and the theory of the OLED display module
Reality is calculated according to setting rule in red tristimulus values, the theoretical green tristimulus values, the theoretical blue tristimulus values
Parametric data is surveyed, and the first parametric data is compensated according to the actual measurement parametric data to obtain the second parametric data, and will
Second parametric data is as the first parametric data.
10. the 3Gamma of OLED display module according to claim 9 corrects system, which is characterized in that
White object brightness meets gamma curve requirement, and the Gamma value range of the gamma curve are as follows: 2.0~2.4；
The white object brightness of each grayscale is obtained according to the gamma curve, and the Gamma value of the gamma curve is according to 0 grayscale
White object brightness corresponding with 255 grayscale obtains.
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| CN109767729B (en) * | 2019-04-01 | 2023-10-31 | 广州国显科技有限公司 | Screen gamma debugging method and display module |
| CN110197642B (en) * | 2019-05-30 | 2020-12-18 | 京东方科技集团股份有限公司 | Method for acquiring tricolor brightness correction relationship, correction method and correction device of display |
| CN110534058B (en) * | 2019-08-30 | 2021-03-23 | 武汉精立电子技术有限公司 | Method and system for rapidly converging Gamma tuning |
| CN113496683B (en) * | 2020-04-01 | 2022-10-21 | 敦泰电子股份有限公司 | Display adjusting method of vehicle display |
| CN111540309A (en) * | 2020-05-19 | 2020-08-14 | Tcl华星光电技术有限公司 | Mura compensation method and device for display panel, display panel and display device |
| CN111653244B (en) * | 2020-06-30 | 2021-11-30 | 京东方科技集团股份有限公司 | Brightness adjusting method |
| CN111816073B (en) * | 2020-07-06 | 2023-04-25 | 京东方科技集团股份有限公司 | Display module, display device and calibration method of display module |
| US11114051B1 (en) | 2020-08-12 | 2021-09-07 | Tcl China Star Optoelectronics Technology Co., Ltd. | Method, storage medium and display device for adjusting a displayed image |
| CN111968590B (en) * | 2020-08-12 | 2021-10-08 | Tcl华星光电技术有限公司 | Picture display adjusting method and device, storage medium and display equipment |
| CN112992059B (en) * | 2021-02-02 | 2022-03-04 | 深圳精智达技术股份有限公司 | Method and related device for adjusting Gamma of OLED display screen |
| CN113253517B (en) * | 2021-05-14 | 2022-12-09 | 北京京东方显示技术有限公司 | Backlight module, display device and color correction method of display device |
| CN113506537A (en) * | 2021-06-29 | 2021-10-15 | 上海闻泰信息技术有限公司 | Color cast correction method, color cast correction device and system of OLED display |
| CN115731828B (en) * | 2021-08-25 | 2024-10-25 | 广州视源电子科技股份有限公司 | Display correction method, device, nonvolatile storage medium and processor |
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