CN107610642A - A kind of 3Gamma bearing calibrations of OLED display modules and system - Google Patents
A kind of 3Gamma bearing calibrations of OLED display modules and system Download PDFInfo
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- G—PHYSICS
- 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, which provides a kind of 3Gamma bearing calibrations of OLED display modules and system, this method, to be included：S1, the register value for obtaining OLED display modules and the corresponding relation of RGB colour brightness, and the corresponding relation between red, green, blue tristimulus values；S2, first white tristimulus values of the OLED display modules in setting GTG is obtained, carrying out computing according to setting rule obtains 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, gather white intrinsic brilliance and white actual color coordinate, if white intrinsic brilliance and white actual color coordinate do not meet white object brightness and white object chromaticity coordinates, step S2 is performed after then being compensated 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 modules are shown, makes it meet object brightness and target tristimulus values.
Description
Technical field
The present invention relates to technical field of display panel, more particularly to a kind of OLED display modules 3Gamma bearing calibrations and
System.
Background technology
At present, OLED (Organic Light-Emitting Diode, Organic Light Emitting Diode) panel progressively substitutes
TFT-LCD (thin film transistor-liquid crystal display, Thin Film Transistor-LCD) face
Plate, turn into the main flow display panel of in the market.OLED is compared to TFT-LCD, and its colour gamut is wider, and color performs better, and OLED
It is usually used on high-end product, therefore gamma to OLED and the adjustment of chromaticity coordinates are 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.If voltage-type drives, due to the stability of voltage, the pass of white and rgb pixels
System is linear, and is easier to obtain.If current mode drive, due to the shunting of electric current, cause white and rgb pixels
Relation is random, it is difficult to obtain.So 3Gamma (the gamma and chromaticity coordinates) regulations compared to TFT-LCD, OLED 3Gamma are adjusted
Save it is increasingly difficult, wherein, the Gamma of three kinds of colors of RGB of display module is adjusted respectively for 3Gamma regulations.Mesh
Before, most OLED 3Gamma adjusting methods, otherwise the data of collection are more, it is time-consuming long, or the effect of debugging is bad, deposit
The colour cast the problems such as.
The content of the invention
In order to solve the above technical problems, the present invention provides a kind of 3Gamma bearing calibration level systems of OLED display modules,
The white picture that can be shown to OLED display modules carries out debugging correction, it is met object brightness and target tristimulus values,
And debug to take and do not grow.
A kind of 3Gamma bearing calibrations of OLED display modules provided by the invention, comprise the steps：
S1, the register value for obtaining OLED display modules are with the corresponding relation of RGB colour brightness as the first corresponding pass
System, and obtain red tristimulus values, green tristimulus values, blue tristimulus corresponding to any one GTG in 32~255 GTGs
Value, and obtain the corresponding relation between red tristimulus values corresponding to any one GTG, pair between green tristimulus values
It should be related to, the corresponding relation between blue tristimulus values, respectively as red tristimulus values relation, the green tristimulus of full GTG
Value relation, blue tristimulus values relation, and the OLED display modules are obtained corresponding to any one GTG white picture
First white tristimulus values, and by red tristimulus values corresponding to the described first white tristimulus values and any one GTG,
Green tristimulus values, blue tristimulus values carry out computing according to setting rule, obtain corresponding first parametric data, wherein, entirely
Red tristimulus values relation, green tristimulus values relation, the blue tristimulus values relation of GTG are set to the second corresponding relation, described
Any one GTG is as setting GTG；
S2, obtain the first white tristimulus values of the OLED display modules in the setting GTG, and according to described the
Two corresponding relations, the described first white tristimulus values and the first parametric data are subjected to computing according to setting rule, obtained described
Theoretical red tristimulus values, theoretical green tristimulus values, theoretical blue tristimulus of the OLED display modules in the setting GTG
Value, perform step S3；
S3, according to the red tristimulus values of the theory, the green tristimulus values of the theory, the blue tristimulus values of theory
Corresponding red luma, Green brightness, blue luminences are obtained, further according to the red luma, the Green brightness, the blueness
Brightness and first corresponding relation, are corrected to the white picture, perform step S4；
The white intrinsic brilliance and white actual color coordinate of S4, the collection OLED display modules in the setting GTG,
Judge whether white intrinsic brilliance and white actual color coordinate meet white object brightness and white object chromaticity coordinates, if not being inconsistent
Close, then the second white tristimulus values and the red tristimulus of theory according to corresponding to the OLED display modules current picture
Actual measurement parametric data is calculated according to setting rule in value, the green tristimulus values of the theory, the blue tristimulus values of theory,
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 performing 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 relation, the white picture is corrected, is specially：
Obtained pair according to the red luma, the Green brightness, the blue luminences and first corresponding relation
The RGB register value answered, the RGB register value is write to the driving IC of the OLED display modules；
The driving IC writes the RGB register value in the register of the OLED display modules, is posted by described
Storage controls the OLED display modules to be corrected the white picture.
Preferably, also comprise the steps：
The OLED display modules are obtained in white object brightness and white object chromaticity coordinates corresponding to the setting GTG；
Also comprise the steps：
Using a GTG adjacent with the setting GTG as the setting GTG, step S2 is performed.4th, will according to right
Ask the 3Gamma bearing calibrations of the OLED display modules described in 1, it is characterised in that posting for OLED display modules is obtained in step S1
Storage value and the corresponding relation of RGB colour brightness specifically include as the first corresponding relation：
Obtain the register value and its corresponding data voltage and to tie up a RGB color bright of the OLED display modules
Degree, and according to it is described tie up a RGB colour brightness be calculated binding GTG corresponding to parameter T, wherein, T=(Lx-L0)/
(L255-L0), L255, L0, Lx are respectively the OLED display modules in RGB corresponding to 255 GTGs, 0 GTG and x GTGs
Colour brightness, 0≤x≤255；
According to data voltage, parameter T, using linear interpolation method or parabolic interpolation, structure data voltage V and ginseng
Corresponding relation between number T, according to the corresponding relation between data voltage V and parameter T, and the data voltage V and OLED
Corresponding relation between the register value of display module, obtain first corresponding relation.
Preferably, white object brightness meets gamma curve requirement, and the Gamma value scopes of the gamma curve are：
2.0~2.4；
Also comprise the steps：
The Gamma values of gamma curve described in white object luminance acquisition according to corresponding to 0 GTG and 255 GTGs；
The white object brightness of each GTG in 0~255 GTG is obtained according to the gamma curve.
Preferably, second corresponding relation is：
The red tristimulus values is Xr, Yr, Zr, and the green tristimulus values is Xg, Yg, Zg, the blue tristimulus
It is worth for 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 A corresponding to different GTGs 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 relation, by the described first white tristimulus values and choose with
First parametric data carries out computing according to setting rule, obtains theory of the OLED display modules in the setting GTG
Red tristimulus values, theoretical green tristimulus values, theoretical blue tristimulus values, it is specially：
The red tristimulus values of the theory, the green tristimulus values of the theory, the blue tristimulus values of theory 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 red tristimulus values of theory is Xr, Yr, Zr, and the green tristimulus values of theory is Xg, Yg, Zg, institute
It is Xb, Yb, Zb to state theoretical blue tristimulus values, and the first white tristimulus values is Xw, Yw, Zw, the first parametric data be u,
v、w。
Preferably, in step S4 according to corresponding to the OLED display modules current picture the second white tristimulus values and
The red tristimulus values of the theory, the green tristimulus values of the theory, the blue tristimulus values of theory are according to setting rule meter
Calculation obtains surveying parametric data, is specially：
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 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, had
Body is：
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 correction systems of OLED display modules, including：Optical measurement probe, computing control
Molding block, tool；
The optical measurement probe, communicate and connect with the operation control module, for gathering the light of OLED display modules
Parameter information is learned, and by the optical parametric information conveyance to the operation control module, wherein, the optical parametric packet
The OLED display modules are included in white tristimulus values, red tristimulus values, green tristimulus values, blueness corresponding to setting GTG
Tristimulus values；
The operation control module, communicate and connect with the tool, for exporting picture signal to the tool, and control
The optical measurement probe gathers the optical parametric information, always according to the second corresponding relation, by white tristimulus values and selection
The first parametric data corresponding with white tristimulus values according to setting rule carry out computing, obtain the OLED display modules and exist
Theoretical red tristimulus values, theoretical green tristimulus values, the theoretical blue tristimulus values of the setting GTG, and according to the reason
Corresponding red luma, green is obtained by red tristimulus values, the green tristimulus values of the theory, the blue tristimulus values of theory
Colour brightness, blue luminences, further according to the red luma, the Green brightness, the blue luminences and the first corresponding relation,
RGB register value corresponding to output is to the tool；
Wherein, first corresponding relation is corresponding with RGB colour brightness for the register value of the OLED display modules
Relation, second corresponding relation are red tristimulus values relation, green tristimulus values relation, the blue tristimulus values of full GTG
Relation, red tristimulus values relation, green tristimulus values relation, the blue tristimulus values of any one GTG are closed in the full GTG
System, pair between corresponding relation, green tristimulus values between the red tristimulus values of any one GTG in 32~255 GTGs
Should be related to, the corresponding relation between blue tristimulus values correspond to respectively it is identical；
The tool, for receiving the picture signal and the RGB register value, and the picture signal is defeated
Deliver to the OLED display modules, control the OLED display modules show corresponding to picture, also by the RGB register
Value writes the driving IC of the OLED display modules, and the RGB register value is write into the OLED by the driving IC
The register of display module, it is corrected with the white picture by OLED display modules described in the register pair；
Wherein, it is actual bright in the white of the setting GTG also to include the OLED display modules for the optical parametric information
Degree and white actual color coordinate；
The operation control module, it is additionally operable 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 modules and described
Theoretical red tristimulus values, the green tristimulus values of the theory, the blue tristimulus values of theory calculate according to setting rule
The first parametric data is compensated to obtain the second parametric data to actual measurement parametric data, and 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 scopes of the gamma curve are：
2.0~2.4；
The white object brightness of each GTG obtains according to the gamma curve, and the Gamma values of the gamma curve are according to 0
White object brightness corresponding to GTG and 255 GTGs obtains.
Implement the present invention, have the advantages that：By obtaining first white of the OLED display modules in setting GTG
Tristimulus values, and according to the second corresponding relation, the first white tristimulus values and the first parametric data are carried out according to setting rule
Computing, obtain theoretical red tristimulus values, theoretical green tristimulus values, theoretical blueness three of the OLED display modules in setting GTG
Values；Obtained further according to theoretical red tristimulus values, theoretical green tristimulus values, theoretical blue tristimulus values corresponding red
Color, green, blue luminences, corresponding register value can be obtained by red, green, blue luminences and the first corresponding relation,
The white picture of OLED display modules is corrected by the register value.Further according to the shown picture of OLED display modules
It is corrected in face of the first parametric data, until the brightness of white picture shown in OLED display modules and tristimulus values meet
It is required that.The present invention persistently can carry out debugging correction to the shown white picture of OLED display modules, it is finally shown
White picture meet object brightness and target tristimulus values.And the present invention at most only needs to adopt in debugging process is corrected
Collect one group of red tristimulus values, green tristimulus values, blue tristimulus values, and the white brightness and white of OLED display modules
Chromaticity coordinates, and white tristimulus values, the data of collection are not a lot, therefore the time-consuming of debugging is not also grown.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the flow chart of the 3Gamma bearing calibrations of OLED display modules provided by the invention.
Fig. 2 is the VT curve maps between the data voltage V and parameter T of OLED display modules provided by the invention.
Fig. 3 is the flow chart of the 3Gamma bearing calibrations of OLED display modules in another embodiment provided by the invention.
Fig. 4 is the theory diagram of the 3Gamma correction systems of OLED display modules provided by the invention.
Embodiment
The present invention provides a kind of 3Gamma bearing calibrations of OLED display modules, as shown in figure 1, this method includes following steps
Suddenly：
S1, the register value for obtaining OLED display modules are with the corresponding relation of RGB colour brightness as the first corresponding pass
System, and obtain red tristimulus values, green tristimulus values, blue tristimulus corresponding to any one GTG in 32~255 GTGs
Value, and according to the red tristimulus values of the group, green tristimulus values, blue tristimulus values, obtain red corresponding to any one GTG
The corresponding relation between corresponding relation, green tristimulus values between color tristimulus values, the corresponding pass between blue tristimulus values
System, by the corresponding relation between the corresponding relation between red tristimulus values corresponding to any one GTG, green tristimulus values,
Corresponding relation between blue tristimulus values respectively as the red tristimulus values relation of full GTG, green tristimulus values relation,
Blue tristimulus values relation, and OLED display modules are obtained in the first white tristimulus corresponding to any one GTG white picture
Value, and by red tristimulus values, green tristimulus values, blue tristimulus corresponding to the first white tristimulus values and any one GTG
Value carries out computing according to setting rule, obtains corresponding first parametric data, wherein, the red tristimulus values relation of full GTG,
Green tristimulus values relation, blue tristimulus values relation are set to the second corresponding relation, and any one GTG is as setting GTG.It is excellent
Selection of land, any one GTG in step S1 can be 255 GTGs.
S2, first white tristimulus values of the OLED display modules in setting GTG is obtained, and according to the second corresponding relation, will
First white tristimulus values and the first parametric data carry out computing according to setting rule, obtain OLED display modules in setting GTG
Theoretical red tristimulus values, theoretical green tristimulus values, theoretical blue tristimulus values, perform step S3.
It is S3, red according to corresponding to obtaining theoretical red tristimulus values, theoretical green tristimulus values, theoretical blue tristimulus values
Colour brightness, Green brightness, blue luminences, it is right further according to red luma, Green brightness, blue luminences and the first corresponding relation
White picture is corrected, and performs step S4.
The white intrinsic brilliance and white actual color coordinate of S4, collection OLED display modules in setting GTG, judge white
Whether intrinsic brilliance and white actual color coordinate meet white object brightness and white object chromaticity coordinates, if not meeting, basis
Second white tristimulus values corresponding to OLED display module current pictures 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 performing 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 relation, dialogue
Color picture is corrected, and is specially：
The RGB register according to corresponding to obtaining red luma, Green brightness, blue luminences and the first corresponding relation
Value, RGB register value is write to the driving IC of OLED display modules；Here RGB register value that is to say register
Input value.
Drive IC that RGB register value is write to the register of OLED display modules, control OLED to show by register
Module is corrected to white picture.
Further, the 3Gamma bearing calibrations of OLED display modules also comprise the steps：
OLED display modules are obtained in white object brightness and white object chromaticity coordinates corresponding to setting GTG.
The 3Gamma bearing calibrations of OLED display modules also comprise the steps：
Using a GTG adjacent with setting GTG as setting GTG, step S2 is performed.It should be noted that setting here
GTG is determined to tie up a GTG, and a GTG adjacent with the GTG that sets up an office refers to that adjacent one ties up a GTG.Driving IC's ties up on a little
Corresponding binding has register, and each register pair answers one to tie up a GTG, for example, tie up a GTG for 255,245,235,
225th ..., 15,5, every 10 GTGs set a register, if setting GTG as 255 ranks, then 255 ranks it is adjacent one
GTG is then 245 GTGs, if setting GTG as 235 ranks, the adjacent GTG of 235 ranks is 225 ranks and 245 ranks.Further
Ground, the register value of OLED display modules is obtained in step S1 with the corresponding relation of RGB colour brightness as the first corresponding pass
System, specifically includes：
Obtain the register value of OLED display modules and its corresponding data voltage and tie up a RGB colour brightness, and
According to tie up a RGB colour brightness be calculated binding GTG corresponding to parameter T, wherein, T=(Lx-L0)/(L255-L0),
L255, L0, Lx are respectively OLED display modules in RGB colour brightness corresponding to 255 GTGs, 0 GTG and x GTGs, and 0≤x≤
255.Wherein, it is to tie up the RGB brightness of OLED display modules corresponding to a GTG to tie up a RGB colour brightness.
According to data voltage, parameter T, using linear interpolation method or parabolic interpolation, structure data voltage V and ginseng
Corresponding relation between number T, shown according to the corresponding relation between data voltage V and parameter T, and data voltage V and OLED
Corresponding relation between the register value of module, obtain the first corresponding relation.Wherein, data voltage V that is to say that OLED shows mould
The driving IC of group Source voltages.
Further, white object brightness meets gamma curve requirement, and the Gamma value scopes of gamma curve are：2.0
~2.4.
The 3Gamma bearing calibrations of OLED display modules also comprise the steps：
According to the Gamma values of white object luminance acquisition gamma curve corresponding to 0 GTG and 255 GTGs；
The white object brightness of each GTG in 0~255 GTG is obtained according to gamma curve.
Further, the second corresponding relation is：
Red tristimulus values is Xr, Yr, Zr, and green tristimulus values is Xg, Yg, Zg, and blue tristimulus values is 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 A corresponding to different GTGs 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 relation, by the first white tristimulus values and choose with the first ginseng
Measure data and carry out computing according to setting rule, obtain theoretical red tristimulus values, theory of the OLED display modules in setting GTG
Green tristimulus values, theoretical blue tristimulus values, it is specially：
Theoretical red tristimulus values, theoretical green tristimulus values, theoretical blue tristimulus values are obtained by solving following equations
Arrive：
Xw=u* (Xr+Xg+Xb), Yw=v* (Yr+Yg+Yb), Zw=w* (Zr+Zg+Zb)；
Wherein, theoretical red tristimulus values be Xr, Yr, Zr, and theoretical green tristimulus values be Xg, Yg, Zg, theory 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 same OLED display modules immobilizes, and therefore, can choose appointing for OLED display modules
Anticipate tristimulus values red corresponding to a GTG, green, blue, solve A, B, C, D, E, F value.
Xw, Yw, Zw of above-mentioned equation can be measured and drawn, therefore, after the first parametric data is u, v, w determination, Yr,
Yg, Yb can also solve to obtain.Red, green, blue luminences are characterized by Yr, Yg, Yb again.
Further, in step S4 according to corresponding to OLED display module current pictures the second white tristimulus values and reason
Actual measurement parameter is calculated according to setting rule by red tristimulus values, theoretical green tristimulus values, theoretical blue tristimulus values
Data, it is specially：
According to the second white tristimulus values, obtain surveying parametric data 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
For：
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 comprise the steps in step S4：
The second white tristimulus values is gathered, 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 sat for white color
Mark, X, Y, Z are corresponding white tristimulus values.
In another embodiment that the bearing calibration of the present invention provides, comprise the steps：
The first step, first gather each GTG of OLED display modules RGB colour brightness, with obtain RGB register with it is red
The relation of turquoise colour brightness.As shown in Fig. 2 shown in Fig. 2 be a certain GTG in OLED display modules VT curves, wherein V is
IC Source magnitudes of voltage (data voltage for driving IC) are driven on OLED modules, unit is volt, and T obtains according to equation below
Arrive：T (x GTGs)=(Lx-L0)/(L255-L0).VT curves per a piece of OLED display modules differ, and with a piece of
VT curves corresponding to the RGB register of display module also differ, so need to be directed to, per a piece of OLED display modules, collection is red
The brightness of turquoise each GTG, the VT curve equations of RGB register can be obtained.This general VT curve uses multiple first-order equations,
Or second-order equation simulates its curve equation, i.e., using linear interpolation method or parabolic interpolation, obtain between VT
Corresponding relation.Wherein, V is the driving IC of OLED modules Source magnitudes of voltage, the relation of its register value corresponding with driving IC
It is known, it is possible to obtain the exact relationship between RGB register and RGB colour brightness in OLED display modules.
Second step, it is determined that the object brightness and target color coordinates of each GTG (0~255 GTG) of white.The brightness of each GTG
Gamma (Gamma) curve requirement that client proposes need to be met, Gamma values, so can be according to 255 usually within 2.2 ± 0.1
GTG and 0 gray-scale intensity determine the object brightness of each GTG, and the target color coordinates of each GTG should meet that the color that client proposes 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).
3rd step, a kind of feedback compensation and the algoritic module of checking are built, as shown in figure 3, for algoritic module, it
Input variable be a certain GTG white brightness and white chromaticity coordinates (or white tristimulus values), output result is to calculate
The RGB colour brightness value arrived, special parameter are the relational expressions of the distinctive RGB synthesis white of OLED display modules.General
RGB color synthesize in white relation, red tristimulus values Xr, Yr, Zr, green tristimulus values Xg, Yg, Zg, blue tristimulus
The corresponding summation of value Xb, Yb, Zb three is as follows equal to white tristimulus values Xw, Yw, Zw, calculation formula：
Xw=Xr+Xg+Xb, Yw=Yr+Yg+Yb, Zw=Zr+Zg+Zb；
But in OLED display modules, 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
Parameter (u, v, w) with OLED display modules differs in same GTG, and the parameter (u, v, w) with a piece of OLED display modules exists
Different GTGs also differ, meanwhile, change the proportioning of RGB, parameter (u, v, w) also differs, and adjusts chromaticity coordinates (x, y)
Essence, exactly change the proportioning 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 GTG.
Based on this, this programme first using (u, the v, w) of one group of setting, using algoritic module, obtains the brightness value of RGB,
The relation between the RGB register of first step structure and brightness is recycled, obtains corresponding register value, then by register
Be worth write driver IC, and gather the optical parameter data of OLED display modules, judge OLED display modules actual color coordinate and
Whether brightness, which meets, is required, correction is completed if meeting, if be unsatisfactory for, the optical parameter data of actual acquisition is calculated
The parameter (u ', v ', w ') arrived, is compensated with the parameter (u, v, w) assumed originally, obtain one group of new parameter (u ", v ",
W "), parameter (u ", v ", w ") now will be more nearly with actual., finally can be accurate by this compensation cycle algorithm
Completion adjustment.
Because the parameter (u, v, w) between similar GTG, is almost presented linear relationship.So we can use from
According to fixed step-by-step system in full GTG (0~255 GTG), pick out some GTGs carry out above the first step to the essence of the 3rd step
Really adjustment, and its accurate parameter (u, v, w) value is obtained, parameter (u, v, the w) value of other GTGs is according to known to adjacent GTG
Value of consult volume carry out linearly calculate.We can also carry out essence to full GTG (0~255 GTG) using the method for first three step
Really adjustment, initial value of consult volume (u, v, w) corresponding to next GTG, the value of consult volume obtained is debugged using upper one adjacent GTG
(u, v, w) is calculated, it is also ensured that the adjustment of minimum number.
4th step, the register value corresponding to obtained full GTG (0~255 GTG) is write to the drive of OLED display modules
Dynamic IC, is verified.
The present invention also provides a kind of 3Gamma correction systems of OLED display modules, as shown in figure 4, the system includes：Light
Learn measuring probe 1, operation control module 2, tool 3.Wherein, OLED display modules 4 include register, driving IC, drive IC
For writing register value to register, brightness and the chromaticity coordinates of the display screen of OLED display modules 4 are controlled by register.Post
Storage includes the red register that control OLED display modules 4 show red, and control OLED display modules 4 show the green deposit of green
Device, control OLED display modules 4 show the blue register of blueness.
Optical measurement probe 1, communicate and connect with operation control module 2, for gathering the optical parametric of OLED display modules 4
Information, and by optical parametric information conveyance to operation control module 2, wherein, optical parametric information exists including OLED display modules 4
Set white tristimulus values, red tristimulus values, green tristimulus values, the blue tristimulus corresponding to GTG display white picture
Value.
Operation control module 2 connects with the communication of tool 3, for exporting picture signal to tool 3, and controls optical measurement to visit
First 1 collection optical parametric information, always according to the second corresponding relation, by white tristimulus values and selection and white tristimulus values pair
The first parametric data answered carries out computing according to setting rule, obtains theory red three of the OLED display modules 4 in setting GTG
Values, theoretical green tristimulus values, theoretical blue tristimulus values, and pierced according to theoretical red tristimulus values, theoretical green three
Sharp value, theoretical blue tristimulus values obtain corresponding red luma, Green brightness, blue luminences, further according to red luma, green
Brightness, blue luminences and the first corresponding relation, RGB register value corresponding to output to tool 3.Wherein, picture signal bag
Include danger signal, green, blue signal, white signal.
Wherein, the first corresponding relation is corresponding relation of the register value with RGB colour brightness of OLED display modules 4, the
Two corresponding relations be full GTG red tristimulus values relation, green tristimulus values relation, blue tristimulus values relation, full GTG
In any one GTG red tristimulus values relation, green tristimulus values relation, blue tristimulus values relation, with 32~255 ash
The corresponding relation between corresponding relation, green tristimulus values, blueness three in rank between the red tristimulus values of any one GTG
Corresponding relation between values corresponds to identical respectively.For example, the red tristimulus values relation of 1 GTG and the red three of 35 GTGs
Values relation is identical, and the green tristimulus values relation of 1 GTG is identical with the green tristimulus values relation of 35 GTGs, 1 GTG
Blue tristimulus values relation is identical with the blue tristimulus values relation of 35 GTGs.
Tool 3 is used to receive picture signal and RGB register value, and picture signal is delivered into OLED display modules
4, control OLED display module 4 shows corresponding picture, and RGB register value is also write to the driving of OLED display modules 4
IC, by driving IC that RGB register value is write to the register of OLED display modules 4, to be shown by register pair OLED
The white picture of module 4 is corrected.Tool 3 controls respectively according to danger signal, green, blue signal, white signal
OLED display modules 4 show red picture, green picture, blue picture, white picture.
Wherein, it is real in the white intrinsic brilliance and white of setting GTG also to include OLED display modules 4 for optical parametric information
Border chromaticity coordinates.
Operation control module 2, it is additionally operable 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 modules 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
Parametric data is factually surveyed 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 scopes of gamma curve are：2.0
~2.4.
The white object brightness of each GTG obtains according to gamma curve, the Gamma values of gamma curve according to 0 GTG and
White object brightness obtains corresponding to 255 GTGs.
In summary, the present invention proposes a kind of 3Gamma bearing calibration level systems of OLED display modules, can realize lime
The accurately and quickly adjustment of rank (white picture of 0~255 GTG) chromaticity coordinates and gamma curve, make its meet object brightness and
Target color coordinates.First obtain the relation of the register of control red green and blue color and the RGB colour brightness of OLED display modules.
The object brightness and target color coordinates of lime rank (0~255 GTG) are determined again.The method built using this programme, can basis
The white object brightness of each GTG and white chromaticity coordinates, obtain register value corresponding to each GTG (including control OLED show
Show the red register value of module displays, show the register value of green, show the register value of blueness).Finally, by register
Value write-in register, verifies white chromaticity coordinates and gamma curve (i.e. whether white object brightness meets gamma curve).
The present invention can control the Gamma values of the gamma curve of OLED display modules within 2.2 ± 0.03, and the speed debugged
Degree can meet production requirement, can most complete whole automatic debugging process at one minute or so soon.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to is assert
The specific implementation of the present invention is confined to these explanations.For general technical staff of the technical field of the invention,
On the premise of not departing from present inventive concept, some simple deduction or replace can also be made, should all be considered as belonging to the present invention's
Protection domain.
Claims (10)
1. a kind of 3Gamma bearing calibrations of OLED display modules, it is characterised in that comprise the steps：
S1, obtain OLED display modules register value and RGB colour brightness corresponding relation as the first corresponding relation, with
And red tristimulus values, green tristimulus values, blue tristimulus values corresponding to any one GTG in 32 ~ 255 GTGs are obtained, and
To the corresponding relation between the corresponding relation between red tristimulus values corresponding to any one GTG, green tristimulus values,
Corresponding relation between blue tristimulus values, respectively as the red tristimulus values relation of full GTG, green tristimulus values relation,
Blue tristimulus values relation, and the OLED display modules are obtained in the first white corresponding to any one GTG white picture
Tristimulus values, and red tristimulus values, green three corresponding to the described first white tristimulus values and any one GTG are pierced
Swash value, blue tristimulus values according to setting rule carry out computing, obtain corresponding to the first parametric data, wherein, full GTG it is red
Color tristimulus values relation, green tristimulus values relation, blue tristimulus values relation are set to the second corresponding relation, any one ash
Rank is as setting GTG；
S2, first white tristimulus values of the OLED display modules in the setting GTG is obtained, 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 computing according to setting rule, obtain the OLED
Display module is held in the theoretical red tristimulus values, theoretical green tristimulus values, the blue tristimulus values of theory of the setting GTG
Row step S3；
S3, obtained according to the red tristimulus values of the theory, the green tristimulus values of the theory, the blue tristimulus values of theory
Corresponding red luma, Green brightness, blue luminences, further according to the red luma, the Green brightness, the blue luminences
And first corresponding relation, the white picture is corrected, performs step S4；
The white intrinsic brilliance and white actual color coordinate of S4, the collection OLED display modules in the setting GTG, judge
Whether white intrinsic brilliance and white actual color coordinate meet white object brightness and white object chromaticity coordinates, if not meeting,
The second white tristimulus values and the red tristimulus values of the theory, institute according to corresponding to the OLED display modules current picture
State theoretical green tristimulus values, actual measurement parametric data, and root is calculated according to setting rule in the blue tristimulus values of theory
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 performed 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 calibrations of OLED display modules according to claim 1, it is characterised in that in step S3, root
According to the red luma, the Green brightness, the blue luminences and first corresponding relation, the white picture is entered
Row correction, it is specially：
According to corresponding to obtaining the red luma, the Green brightness, the blue luminences and first corresponding relation
RGB register value, the RGB register value is write to the driving IC of the OLED display modules；
The driving IC writes the RGB register value in the register of the OLED display modules, passes through the register
The OLED display modules are controlled to be corrected the white picture.
3. the 3Gamma bearing calibrations of OLED display modules according to claim 2, it is characterised in that also including following steps
Suddenly：
The OLED display modules are obtained in white object brightness and white object chromaticity coordinates corresponding to the setting GTG；
Also comprise the steps：
Using a GTG adjacent with the setting GTG as the setting GTG, step S2 is performed.
4. the 3Gamma bearing calibrations of OLED display modules according to claim 1, it is characterised in that obtained in step S1
The register value of OLED display modules, as the first corresponding relation, specifically includes with the corresponding relation of RGB colour brightness：
Obtain the register value of the OLED display modules and its corresponding data voltage and tie up a RGB colour brightness, and
According to it is described tie up a RGB colour brightness be calculated binding GTG corresponding to parameter T, wherein, T=（Lx-L0）/ (L255-L0),
L255, L0, Lx are respectively the OLED display modules in RGB colour brightness corresponding to 255 GTGs, 0 GTG and x GTGs, 0≤x
≤255；
According to data voltage, parameter T, linear interpolation method or parabolic interpolation, structure data voltage V and parameter T are utilized
Between corresponding relation, according to the corresponding relation between data voltage V and parameter T, and the data voltage V and OLED is shown
Corresponding relation between the register value of module, obtain first corresponding relation.
5. the 3Gamma bearing calibrations of OLED display modules according to claim 1, it is characterised in that
White object brightness meets gamma curve requirement, and the Gamma value scopes of the gamma curve are：2.0~2.4；Also wrap
Include following step：
The Gamma values of gamma curve described in white object luminance acquisition according to corresponding to 0 GTG and 255 GTGs；
The white object brightness of each GTG in 0 ~ 255 GTG is obtained according to the gamma curve.
6. the 3Gamma bearing calibrations of OLED display modules according to claim 1, it is characterised in that second correspondence
Relation is：
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, 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 all higher than 0, and different
A corresponding to GTG is identical, B is identical, C is identical, D is identical, E is identical, F is identical.
7. the 3Gamma bearing calibrations of OLED display modules according to claim 6, it is characterised in that
According to second corresponding relation in step S2, by the described first white tristimulus values and choosing with first parameter
Data carry out computing according to setting rule, obtain theoretical red tristimulus of the OLED display modules in the setting GTG
Value, theoretical green tristimulus values, theoretical blue tristimulus values, it is specially：
The red tristimulus values of the theory, the green tristimulus values of the theory, the blue tristimulus values of theory pass through under solution
Equation is stated to obtain：
Xw=u* (Xr+Xg+Xb), Yw=v* (Yr+Yg+Yb), Zw=w* (Zr+Zg+Zb)；
Wherein, the red tristimulus values of theory is Xr, Yr, Zr, and the green tristimulus values of theory is Xg, Yg, Zg, the reason
It is Xb, Yb, Zb by blue tristimulus values, the first white tristimulus values is Xw, Yw, Zw, and the first parametric data is u, v, w.
8. the 3Gamma bearing calibrations of OLED display modules according to claim 7, it is characterised in that basis in step S4
Second white tristimulus values corresponding to the OLED display modules current picture and the red tristimulus values of the theory, the reason
Actual measurement parametric data is calculated according to setting rule by green tristimulus values, the blue tristimulus values of theory, is specially：
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 parametric data is 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 the actual measurement parametric data in step S4, specifically
For：
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 be u ' ', v ' ',
w’’。
A kind of 9. 3Gamma correction systems of OLED display modules, it is characterised in that including：Optical measurement probe, operation control
Module, tool；
The optical measurement probe, communicate and connect with the operation control module, for gathering the Optical Parametric of OLED display modules
Number information, and by the optical parametric information conveyance to the operation control module, wherein, the optical parametric information includes institute
OLED display modules are stated to pierce in white tristimulus values, red tristimulus values, green tristimulus values, blueness three corresponding to setting GTG
Swash value；
The operation control module, communicate and connect with the tool, for exporting picture signal to the tool, and described in control
Optical measurement probe gathers the optical parametric information, always according to the second corresponding relation, by white tristimulus values and selection with
First parametric data corresponding to white tristimulus values carries out computing according to setting rule, obtains the OLED display modules described
The theoretical red tristimulus values, theoretical green tristimulus values, theoretical blue tristimulus values of GTG are set, and it is red according to the theory
It is bright that color tristimulus values, the green tristimulus values of the theory, the blue tristimulus values of theory obtain corresponding red luma, green
Degree, blue luminences, further according to the red luma, the Green brightness, the blue luminences and the first corresponding relation, output
Corresponding RGB register value is to the tool；
Wherein, first corresponding relation is the register value pass corresponding with RGB colour brightness of the OLED display modules
System, second corresponding relation close for the red tristimulus values relation, green tristimulus values relation, blue tristimulus values of full GTG
It is that red tristimulus values relation, green tristimulus values relation, the blue tristimulus values of any one GTG are closed in the full GTG
System, pair between corresponding relation, green tristimulus values between the red tristimulus values of any one GTG in 32 ~ 255 GTGs
Should be related to, the corresponding relation between blue tristimulus values correspond to respectively it is identical；
The tool, it is delivered to for receiving the picture signal and the RGB register value, and by the picture signal
The OLED display modules, control the OLED display modules show corresponding to picture, also the RGB register value is write
Enter the driving IC of the OLED display modules, the RGB register value is write into the OLED by the driving IC shows
The register of module, it is corrected with the white picture by OLED display modules described in the register pair；
Wherein, the optical parametric information also include the OLED display modules it is described setting GTG white intrinsic brilliance and
White actual color coordinate；
The operation control module, be additionally operable to judge white intrinsic brilliance and white actual color coordinate whether to meet white object bright
Degree and white object chromaticity coordinates, if not meeting, according to the white tristimulus values of the OLED display modules and the theory
Reality is calculated according to setting rule in red tristimulus values, the green tristimulus values of the theory, the blue tristimulus values of theory
Parametric data is surveyed, and the first parametric data is compensated to obtain the second parametric data according to the parametric data of surveying, and will
Second parametric data is as the first parametric data.
10. the 3Gamma correction systems of OLED display modules according to claim 9, it is characterised in that
White object brightness meets gamma curve requirement, and the Gamma value scopes of the gamma curve are：2.0~2.4；
The white object brightness of each GTG obtains according to the gamma curve, and the Gamma values of the gamma curve are according to 0 GTG
With 255 GTGs corresponding to white object brightness obtain.
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| Publication number | Publication date |
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| WO2019061677A1 (en) | 2019-04-04 |
| CN107610642B (en) | 2019-05-24 |
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