CN109767722B - OLED module Gamma adjusting method and device - Google Patents
OLED module Gamma adjusting method and device Download PDFInfo
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Abstract
The invention discloses an OLED module Gamma adjusting method and device. The method comprises the following steps: acquiring a maximum gray scale value corresponding to the OLED module; acquiring a defined gray scale value according to the maximum gray scale value and a set Gamma curve; forming a first gray scale interval by the maximum gray scale value and the defined gray scale value, wherein the first gray scale interval comprises a plurality of first node gray scale values, and acquiring a first target voltage value corresponding to each first node gray scale value by using a linear interpolation method; adjusting a voltage value corresponding to a first node gray scale value in a first gray scale interval to a corresponding first target voltage value; defining a gray scale value and a minimum set gray scale value to form a second gray scale interval, wherein the second gray scale interval comprises a plurality of second node gray scale values, and acquiring a second target voltage value corresponding to each second node gray scale value by using a coefficient matrix method; and adjusting the voltage value corresponding to the second node gray scale value in the second gray scale interval to a corresponding second target voltage value. According to the technical scheme, the Gamma adjusting efficiency of the OLED module is improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to an OLED module Gamma adjusting method and device.
Background
The Gamma curve of the display module is an important parameter of the display module for representing the response characteristic of optical brightness to an electric signal, and the characteristic parameter of a display picture of the display module can be adjusted by adjusting the Gamma curve of the display module so as to improve the display effect of the display module.
The OLED (Organic Light-Emitting Diode) module is more and more widely applied due to its advantages of self-luminescence, wide viewing angle, bright color, and the like, and currently, commonly used Gamma adjustment methods for the OLED module include a linear interpolation method and a coefficient matrix method, but the adjustment speeds of the linear interpolation method and the coefficient matrix method for a high gray scale interval and a low gray scale interval are inconsistent, thereby greatly reducing the Gamma adjustment efficiency of the OLED module.
Disclosure of Invention
The invention provides an OLED module Gamma adjusting method and device, wherein a Gamma curve of a high gray scale interval is adjusted by a linear interpolation method, a Gamma curve of a low gray scale interval is adjusted by a coefficient matrix method, the Gamma curve of the high gray scale interval is adjusted by the linear interpolation method at a high speed, and the Gamma curve of the low gray scale interval is adjusted by the coefficient matrix method at a high speed, so that the Gamma adjusting efficiency of the OLED module is improved.
In a first aspect, an embodiment of the present invention provides an OLED module Gamma adjustment method, including:
acquiring a maximum gray scale value corresponding to the OLED module;
acquiring a defined gray scale value according to the maximum gray scale value and a set Gamma curve;
forming a first gray scale interval by the maximum gray scale value and the defined gray scale value, wherein the first gray scale interval comprises a plurality of first node gray scale values, and acquiring a first target voltage value corresponding to each first node gray scale value by using a linear interpolation method;
adjusting the voltage value corresponding to the first node gray scale value in the first gray scale interval to the corresponding first target voltage value;
the defined gray scale value and the minimum set gray scale value form a second gray scale interval, the second gray scale interval comprises a plurality of second node gray scale values, and a coefficient matrix method is used for obtaining a second target voltage value corresponding to each second node gray scale value;
and adjusting the voltage value corresponding to the second node gray scale value in the second gray scale interval to the corresponding second target voltage value.
Further, the obtaining of the first target voltage value corresponding to each gray-scale value of the first node by using a linear interpolation method includes:
acquiring a maximum voltage value corresponding to the maximum gray-scale value and a defined voltage value corresponding to the defined gray-scale value;
and acquiring a first target voltage value corresponding to the first node gray scale value according to the maximum gray scale value, the defined gray scale value, the maximum voltage value, the defined voltage value and the first node gray scale value.
Further, the obtaining of the maximum voltage value corresponding to the maximum grayscale value and the defining voltage value corresponding to the defining grayscale value includes:
acquiring a maximum voltage value corresponding to the maximum gray scale value according to the first target brightness and the first target color temperature;
and acquiring a defined voltage value corresponding to the defined gray-scale value according to the second target brightness and the second target color temperature.
Further, before the obtaining of the first target voltage value corresponding to each first node gray-scale value by using a linear interpolation method, the method further includes:
acquiring a set gray scale value according to the maximum gray scale value and the set Gamma curve; wherein, the set gray scale value is an adjacent gray scale value of the maximum gray scale value;
the obtaining of the first target voltage value corresponding to each first node gray scale value by using a linear interpolation method includes:
acquiring a maximum voltage value corresponding to the maximum gray scale value and a set voltage value corresponding to the set gray scale value;
and acquiring a first target voltage value corresponding to the first node gray scale value according to the maximum gray scale value, the set gray scale value, the maximum voltage value, the set voltage value and the first node gray scale value.
Further, the obtaining of the maximum voltage value corresponding to the maximum grayscale value and the set voltage value corresponding to the set grayscale value includes:
acquiring a maximum voltage value corresponding to the maximum gray scale value according to the first target brightness and the first target color temperature;
and acquiring a set voltage value corresponding to the set gray scale value according to the third target brightness and the third target color temperature.
Further, the obtaining of the second target voltage value corresponding to each second node gray scale value by using a coefficient matrix method includes:
acquiring a coefficient matrix corresponding to the gray scale value of each second node according to the defined voltage value corresponding to the defined gray scale value and the set Gamma curve;
and acquiring a second target voltage value corresponding to the second node gray-scale value according to the coefficient matrix and the defined voltage value.
In a second aspect, an embodiment of the present invention provides an OLED module Gamma adjustment apparatus, including:
the maximum gray scale value acquisition module is used for acquiring the maximum gray scale value corresponding to the OLED module;
the defining gray scale value obtaining module is used for obtaining a defining gray scale value according to the maximum gray scale value and a set Gamma curve;
the first target voltage value acquisition module is used for acquiring a first target voltage value corresponding to each first node gray scale value in a first gray scale interval formed by the maximum gray scale value and the defined gray scale value by using a linear interpolation method;
the first target voltage value adjusting module is used for adjusting the voltage value corresponding to the first node gray scale value in the first gray scale interval to the corresponding first target voltage value;
the second target voltage value acquisition module is used for acquiring a second target voltage value corresponding to each second node gray scale value in a second gray scale interval formed by the defined gray scale value and the minimum set gray scale value by using a coefficient matrix method;
and the second target voltage value adjusting module is used for adjusting the voltage value corresponding to the second node gray scale value in the second gray scale interval to the corresponding second target voltage value.
Further, the device for adjusting Gamma of the OLED module further includes:
the maximum voltage value acquisition module is used for acquiring a maximum voltage value corresponding to the maximum gray-scale value according to the first target brightness and the first target color temperature;
the definition voltage value acquisition module is used for acquiring definition voltage values corresponding to the definition gray-scale values according to the second target brightness and the second target color temperature;
the first target voltage value obtaining module is further configured to obtain a first target voltage value corresponding to the first node gray scale value according to the maximum gray scale value, the defined gray scale value, the maximum voltage value, the defined voltage value, and the first node gray scale value.
Further, the device for adjusting Gamma of the OLED module further includes:
the set gray scale value acquisition module is used for acquiring a set gray scale value according to the maximum gray scale value and the set Gamma curve; wherein, the set gray scale value is an adjacent gray scale value of the maximum gray scale value;
the set voltage value acquisition module is used for acquiring a set voltage value corresponding to the set gray-scale value according to the third target brightness and the third target color temperature;
the first target voltage value obtaining module is further configured to obtain a first target voltage value corresponding to the first node gray scale value according to the maximum gray scale value, the set gray scale value, the maximum voltage value, the set voltage value, and the first node gray scale value.
Further, the OLED module Gamma adjusting module further includes:
and the coefficient matrix acquisition module is used for acquiring the coefficient matrix corresponding to the gray scale value of each second node according to the defined voltage value corresponding to the defined gray scale value and the set Gamma curve.
The embodiment of the invention provides an OLED module Gamma adjusting method and an adjusting device, which utilize a linear interpolation method to adjust the voltage value corresponding to the gray scale value of each first node in a first gray scale interval to a corresponding first target voltage value, utilize a coefficient matrix method to adjust the voltage value corresponding to the gray scale value of each second node in a second gray scale interval to a corresponding second target voltage value, overcome the defect that the adjusting speed of the linear interpolation method or the coefficient matrix method to the Gamma curve of the high gray scale interval and the low gray scale interval of the OLED module is inconsistent, and the first gray scale interval is formed by the maximum gray scale value and the defined gray scale value, the second gray scale interval is formed by the defined gray scale value and the minimum set gray scale value, namely the first gray scale interval is a high gray scale interval relative to the second gray scale interval, the adjusting speed of the Gamma curve of the high gray scale interval is fast by the linear interpolation method, and the Gamma curve of the coefficient matrix method to the low gray scale interval is fast, the Gamma adjusting efficiency of the OLED module is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description will be given below of the drawings required for the embodiments or the technical solutions in the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic flowchart of a Gamma adjustment method for an OLED module according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a relationship between parameters corresponding to a Gamma curve of an OLED module according to an embodiment of the present invention;
FIG. 3 is a schematic flowchart of another Gamma adjustment method for an OLED module according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of an OLED module Gamma adjustment device according to a third embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a schematic flowchart of an OLED module Gamma adjustment method according to an embodiment of the present invention. The technical scheme of the embodiment of the invention can be applied to scenes in which the Gamma curve of the OLED module needs to be adjusted, and can be executed by the Gamma adjusting device of the OLED module provided by the embodiment of the invention. As shown in fig. 1, the method includes:
and S110, acquiring the maximum gray scale value corresponding to the OLED module.
For example, taking an 8-bit gray scale value as an example, the range of the gray scale value of the OLED module is 0 gray scale to 255 gray scale, and the maximum gray scale value is 255 gray scale. It should be noted that, here, the grayscale value is only described as 8 bits, and the number of bits of the grayscale value is not limited in the embodiment of the present invention.
And S120, acquiring a defined gray scale value according to the maximum gray scale value and a set Gamma curve.
Specifically, the adjustment of the display brightness of the display module can be realized by adjusting a Gamma curve of the display module, and voltage values corresponding to gray scale values of nodes in the Gamma curve correspond to stored values in an OLED module register one by one, so that the Gamma curve can represent the corresponding relationship between the voltage values of the gray scale values of the nodes and the gray scale values, and can also represent the corresponding relationship between the stored values in the OLED module register and the gray scale values.
Fig. 2 is a schematic diagram illustrating a relationship between parameters corresponding to a Gamma curve of an OLED module according to an embodiment of the present invention. As shown in fig. 2, a set of set Gamma curves 201, 202 and 203 is exemplarily shown, wherein the abscissa in fig. 2 represents the node Gray level, where the number of bits of the node Gray level is exemplarily set to 8 bits, i.e., 256 node Gray level values in Gamma orientation, the left ordinate represents the stored value Data in the OLED module register, which may represent the initial value of the Gray level to be adjusted stored in the register, where the stored value Data is exemplarily represented in 10-bit binary, the stored value Data has a value range of 0-1024, and the right ordinate represents the voltage value V, where the voltage value V is exemplarily set to a value range of 2.0V-5.0V.
Specifically, as shown in fig. 2, for each node Gray level Gray value Gray in a single Gamma curve, there is a one-to-one correspondence between a voltage value V and a stored value Data of a register, that is, each node voltage value in the voltage value V corresponds to each node stored value of the stored value Data, taking the value range of the voltage value V as a1-a2 and the value range of the stored value Data as 0-1024 as an example, the correspondence relationship between the two values satisfies the following formula:
for example, when the Data value of the storage value is 0, the voltage value V is 2.0V; when the Data value of the storage value is 1024, the voltage value V is 5.0V; when the stored value Data takes a value of 512, the voltage value V takes a value of 3.5V. Given a stored value Data, the corresponding voltage value V can be determined, the adjustment of which appears as an adjustment of the stored value Data.
The gray scale value is defined as the boundary gray scale value of the linear variation interval and the non-linear variation interval in the set Gamma curve. Specifically, when the Gray level value Gray variation of the node of the Gamma curve in fig. 2 is a constant value, whether the Data variation of the storage value is a constant value or not, or whether the voltage V variation is a constant value, may be compared to determine a linear variation interval and a non-limited variation interval of the Gamma curve, and then determine the size of the defined Gray level value, as shown in fig. 2, the size of the defined Gray level value may be set to be 50. For example, the set Gamma curve may be a Gamma2.2 curve.
It should be noted that, in fig. 2, the defined gray scale value is obtained according to the Gamma curve 201 only by way of example, and the defined gray scale value may also be obtained by setting the Gamma curve according to the actual display requirement of the OLED module, which is not limited in the embodiment of the present invention.
S130, forming a first gray scale interval by the maximum gray scale value and the defined gray scale value, wherein the first gray scale interval comprises a plurality of first node gray scale values, and acquiring a first target voltage value corresponding to each first node gray scale value by using a linear interpolation method.
Specifically, the maximum gray scale value and a first gray scale interval formed by defining the gray scale value are set as the linear change interval of the Gamma curve. For example, in a linear variation interval of the Gamma curve, that is, in a first gray scale interval, a voltage value corresponding to each gray scale value of the first node does not need to be adjusted, and only the voltage value corresponding to a part of the gray scale values of the first node in the first gray scale interval may be adjusted to a corresponding first target voltage value, so as to meet the display requirement of the OLED module. In addition, because the first node gray scale value is in the first gray scale interval of the Gamma curve, namely the linear change interval, the first target voltage value corresponding to the first node gray scale value in the first gray scale interval can be accurately and quickly acquired by using the linear interpolation method.
Optionally, a maximum voltage value corresponding to the maximum gray scale value and a defined voltage value corresponding to the defined gray scale value are obtained, and a first target voltage value corresponding to the first node gray scale value is obtained according to the maximum gray scale value, the defined gray scale value, the maximum voltage value, the defined voltage value and the first node gray scale value.
Optionally, the maximum voltage value corresponding to the maximum grayscale value may be obtained according to the first target brightness and the first target color temperature, and the defining voltage value corresponding to the defining grayscale value may be obtained according to the second target brightness and the second target color temperature. Specifically, the brightness of the OLED module may be adjusted to a first target brightness, the color temperature may be adjusted to a first target color temperature, at this time, the gray scale value of the OLED module is the maximum gray scale value, and the corresponding voltage value is the maximum voltage value corresponding to the maximum gray scale value. The brightness of the OLED module can be adjusted to a second target brightness, the color temperature is adjusted to a second target color temperature, the gray scale value of the OLED module is the defined gray scale value, and the corresponding voltage value is the defined voltage value corresponding to the defined gray scale value.
As shown in fig. 2, since the voltage value V has a one-to-one correspondence relationship with the stored value Data, a process of obtaining the first target voltage value corresponding to the first node grayscale value according to the maximum grayscale value, the defined grayscale value, the maximum voltage value, the defined voltage value, and the first node grayscale value may be equivalent to a process of obtaining the first target stored value corresponding to the first target voltage value corresponding to the first node grayscale value according to the maximum grayscale value, the defined grayscale value, the maximum stored value corresponding to the maximum voltage value, the defined stored value corresponding to the defined voltage value, and the first node grayscale value. It may be exemplarily set that the OLED module includes red, green and blue pixel cells R, G and B.
Firstly, the brightness of the OLED module can be adjusted to a first target brightness, and the color temperature can be adjusted to a first target color temperature, so as to obtain a set of maximum storage values corresponding to the maximum voltage values: r255, G255 and B255. Then, the brightness of the OLED module can be adjusted to a second target brightness, and the color temperature can be adjusted to a second target color temperature, so as to obtain a set of defined storage values corresponding to the defined voltage values: RHMin, GHmin and BHmin. Setting defined gray-scale values as RGraymin, GGraymin and BGraymin, and calculating a first target storage value corresponding to a group of first target voltage values corresponding to the gray-scale value Grayi of the ith first node in a first gray-scale interval formed by the maximum gray-scale value and the defined gray-scale values by utilizing a linear interpolation method, such as a linear interpolation method: ri, Gi and Bi, and the specific calculation formula is as follows:
for example, it can be set that the defined gray-scale values RGraymin, GGraymin, BGraymin are all 50, and the defined storage values RHmin, GHmin, BHmin corresponding to the defined voltage values can be represented as R50, G50, 50, and the above formula is modified as follows:
it should be noted that the luminance values of the first target luminance and the second target luminance may be set according to actual display requirements of the OLED module, and both the first target color temperature and the second target color temperature meet the CIE1931 standard. In addition, fig. 2 exemplarily shows that the defined gray-scale values of the Gamma curves 201, 202, and 203 are the same, and different defined gray-scale values of different Gamma curves may also be set, which is not limited in the embodiment of the present invention.
S140, adjusting the voltage value corresponding to the first node gray scale value in the first gray scale interval to the corresponding first target voltage value.
Specifically, the voltage value corresponding to the first node gray scale value in the first gray scale interval is adjusted to the first target voltage value, which may be implemented by adjusting the stored value Data in the register corresponding to the first node gray scale value to the Ri, Gi, and Bi obtained through the above calculation.
And S150, forming a second gray scale interval by the defined gray scale value and the minimum set gray scale value, wherein the second gray scale interval comprises a plurality of second node gray scale values, and acquiring a second target voltage value corresponding to each second node gray scale value by using a coefficient matrix method.
Exemplarily, taking a gray scale value of 8 bits as an example, if the adjustment range of the gray scale value is 0-255, the minimum set gray scale value may be set to 0; if the adjustment range of the gray scale value is 20-230, the minimum set gray scale value can be set to 20 gray scales. The embodiment of the invention does not limit the specific value of the minimum set gray scale value, and can be set according to the actual display requirement of the OLED module.
And defining a second gray scale interval formed by the gray scale value and the minimum set gray scale value, namely setting a nonlinear change interval of the Gamma curve. Similarly, in a non-linear change interval of the Gamma curve, namely the second gray scale interval, the voltage value corresponding to each second node gray scale value does not need to be adjusted, and only the voltage value corresponding to a part of the second node gray scale values in the second gray scale interval can be adjusted to the corresponding second target voltage value, so that the display requirement of the OLED module is met. In addition, because the second node gray-scale value is in the second gray-scale interval of the Gamma curve, namely the nonlinear change interval, the adjustment speed of the Gamma curve by using the linear interpolation method is slow and the error is large, and therefore a coefficient matrix method without requirements on the linear corresponding relation is selected for adjustment.
Optionally, a coefficient matrix corresponding to each gray scale value of the second node may be obtained according to the defined voltage value corresponding to the defined gray scale value and the set Gamma curve, and a second target voltage value corresponding to the gray scale value of the second node may be obtained according to the coefficient matrix and the defined voltage value.
Similarly, since the voltage value V and the stored value Data have a one-to-one correspondence relationship, a process of obtaining the coefficient matrix corresponding to each second node gray scale value according to the defined voltage value corresponding to the defined gray scale value and the set Gamma curve may be equivalent to a process of obtaining the coefficient matrix corresponding to each second node gray scale value according to the two-segment stored value corresponding to the defined voltage value and the set Gamma curve. For example, the adjustment coefficients in the coefficient matrix are equal to the ratio of the stored values corresponding to the gray-scale values of the second node to the stored values corresponding to the defined gray-scale values, and the obtained one or more sets of adjustment coefficients may form a coefficient matrix.
For example, as shown in fig. 2, when the defined gray level value is 50, the corresponding stored value Data can be set to 395. The non-linear interval on the Gamma curve 201 may be set, that is, when the gray level value of the second node in the second gray level interval takes values of 50, 45, 40, 35, 30, 25, 20, 15, 10, 5, and 0, the corresponding stored values Data are 395, 388, 379, 368, 355, 340, 323, 300, 260, 200, and 0, respectively. The stored value corresponding to the gray-scale value of the second node is divided by the stored value corresponding to the defined gray-scale value to obtain a group of corresponding adjustment coefficients: 1.00, 0.98, 0.96, 0.93, 0.90, 0.86, 0.82, 0.76, 0.66, 0.51, 0. For example, a Gamma curve 201 in fig. 2 may be set to correspond to a red pixel cell of the OLED module, a Gamma curve 202 corresponds to a green pixel cell of the OLED module, and a Gamma curve 203 corresponds to a blue pixel cell of the OLED module, so that a coefficient matrix [ CoxR, CoxG, CoxB ] may be obtained, where CoxR corresponds to any one of a set of adjustment coefficients 1.00, 0.98, 0.96, 0.93, 0.90, 0.86, 0.82, 0.76, 0.66, 0.51, and 0 obtained by setting the Gamma curve 201; CoxG and CoxB correspond to any one value in a group of adjusting coefficients obtained according to the Gamma curve 202 and the Gamma curve 203 respectively.
At this time, the specific formula for calculating the second target storage values Rj, Gj and Bj corresponding to a group of second target voltage values corresponding to the jth second node gray scale value in the second gray scale interval by using the coefficient matrix method is as follows:
Rj＝CoxRj*RGraymin
Gj＝CoxGj*GGraymin
Bj＝CoxBj*BGraymin
wherein, CoxRj, CoxGj and CoxBj respectively correspond to the adjusting coefficients of the j second node gray scale value, and RGraymin, GGraymin and BGraymin are respectively the defining gray scale values of Gamma curves 201, 202 and 203.
It should be noted that, in this embodiment, the value interval of the second-node grayscale value in the process of obtaining the coefficient matrix is set to be 5 only by way of example, which is not limited in the embodiment of the present invention. Meanwhile, the adjustment coefficient is exemplarily represented to two digits after the decimal point, and the adjustment coefficient may also be represented in the form of a multi-digit decimal or fraction.
And S160, adjusting the voltage value corresponding to the second node gray scale value in the second gray scale interval to the corresponding second target voltage value.
Specifically, the voltage value corresponding to the second node gray-scale value in the second gray-scale interval is adjusted to the second target voltage value, which may be implemented by adjusting the storage value Data in the register corresponding to the second node gray-scale value to Rj, Gj, and Bj obtained through the above calculation.
Optionally, after the step of adjusting the Gamma of the OLED module is completed, the adjusted stored value Data (Ri, Gi, Bi, Rj, Gj, Bj) may be written into a register of an integrated chip in the OLED module and burned, where the register may be, for example, an eeprogram (Electrically-Erasable Programmable Read-Only-Memory).
The embodiment of the invention utilizes a linear interpolation method to adjust the voltage value corresponding to the gray scale value of each first node in the first gray scale interval to the corresponding first target voltage value, utilizes a coefficient matrix method to adjust the voltage value corresponding to the gray scale value of each second node in the second gray scale interval to the corresponding second target voltage value, overcomes the defect that the adjustment speed of the linear interpolation method or the coefficient matrix method to the Gamma curve of the high gray scale interval and the low gray scale interval of the OLED module is inconsistent, and the first gray scale interval is formed by the maximum gray scale value and the defined gray scale value, the second gray scale interval is formed by the defined gray scale value and the minimum set gray scale value, the first gray scale interval is a high gray scale interval relative to the second gray scale interval, the Gamma curve of the high gray scale interval is adjusted quickly by using a linear interpolation method, and the Gamma curve of the low gray scale interval is adjusted quickly by using a coefficient matrix method, so that the Gamma adjustment efficiency of the OLED module is improved.
Example two
Fig. 3 is a flowchart of another method for adjusting Gamma of an OLED module according to a second embodiment of the present invention, as shown in fig. 3, after step 120 and before step 130, the method for adjusting Gamma of an OLED module may further include:
and S230, acquiring a set gray scale value according to the maximum gray scale value and the set Gamma curve. And the set gray scale value is an adjacent gray scale value of the maximum gray scale value.
For example, taking an 8-bit gray scale value as an example, the range of the gray scale value of the OLED module is 0 gray scale to 255 gray scale, and the maximum gray scale value is 255 gray scale. As shown in fig. 2, the set gray level value may be set according to the set Gamma curve 201 and the maximum gray level value, for example, the set gray level value may be set according to the set Gamma curve as the adjacent gray level value of the maximum gray level value, for example, the set gray level value may be 254 if the maximum gray level value is 255. And acquiring a maximum voltage value corresponding to the maximum gray-scale value and a set voltage value corresponding to the set gray-scale value, and acquiring a first target voltage value corresponding to the first node gray-scale value according to the maximum gray-scale value, the set gray-scale value, the maximum voltage value, the set voltage value and the first node gray-scale value.
Optionally, the maximum voltage value corresponding to the maximum gray scale value may be obtained according to the first target brightness and the first target color temperature, and the set voltage value corresponding to the set gray scale value may be obtained according to the third target brightness and the third target color temperature. Specifically, the brightness of the OLED module may be adjusted to a first target brightness, the color temperature may be adjusted to a first target color temperature, at this time, the gray scale value of the OLED module is the maximum gray scale value, and the corresponding voltage value is the maximum voltage value corresponding to the maximum gray scale value. The brightness of the OLED module can be adjusted to a third target brightness, the color temperature is adjusted to a third target color temperature, the gray scale value of the OLED module is the set gray scale value, and the corresponding voltage value is the set voltage value corresponding to the set gray scale value.
It should be noted that the first target brightness and the third target brightness may be set according to actual display requirements of the OLED module, and both the first target color temperature and the third target color temperature meet the CIE1931 standard.
For example, referring to fig. 2, since the voltage value V and the stored value Data have a one-to-one correspondence relationship, the process of obtaining the first target voltage value corresponding to the first node grayscale value according to the maximum grayscale value, the set grayscale value, the maximum voltage value, the set voltage value, and the first node grayscale value may be equivalent to the process of obtaining the first target stored value corresponding to the first target voltage value corresponding to the first node grayscale value according to the maximum grayscale value, the set grayscale value, the maximum stored value corresponding to the maximum voltage value, the set stored value corresponding to the set voltage value, and the first node grayscale value. It may be exemplarily set that the OLED module includes red, green and blue pixel cells R, G and B.
Firstly, the brightness of the OLED module can be adjusted to a first target brightness, and the color temperature can be adjusted to a first target color temperature, so as to obtain a set of maximum storage values corresponding to the maximum voltage values: r255, G255, and B255, the maximum gray level value can be set as the mth first-node gray level value, and the maximum storage value corresponding to the maximum voltage value can also be expressed as: rm、GmAnd Bm. Then, the brightness of the OLED module may be adjusted to a third target brightness, the color temperature may be adjusted to a third target color temperature, a set of setting storage values corresponding to the set voltage values is obtained, and the set gray level value may be set to the m-1 st first node gray level value: rm-1、Gm-1And Bm-1. Setting the gray scale values to RGray respectivelym-1、GGraym-1、BGraym-1Maximum Gray scale value of GraymCalculating the maximum Gray level value and defining the Gray level value to form the m-2 th Gray level value of the first node in the first Gray level interval by linear interpolation, such as linear interpolationm-2First target storage values corresponding to a corresponding set of first target voltage values: rm-2、Gm-2And Bm-2The specific calculation formula is as follows:
the calculation engineering for obtaining the stored value corresponding to the m-2 th first node gray-scale value from the stored value corresponding to the m-th first node gray-scale value and the stored value corresponding to the m-1 st first node gray-scale value is exemplarily shown here. Similarly, the above formula can also be applied, and the storage value corresponding to the m-3 th first node gray-scale value is obtained from the storage value corresponding to the m-1 th first node gray-scale value and the storage value corresponding to the m-2 th first node gray-scale value, and so on.
Therefore, the calculation of the stored values corresponding to all the first node gray scale values in the first gray scale interval can be completed by using the recursion relational expression, so that a first target voltage value corresponding to the first node gray scale value is obtained, and the first target voltage value corresponding to the first node gray scale value regulating value in the first gray scale interval is obtained.
According to the method and the device, the first target voltage value corresponding to the first node gray scale value is obtained according to the maximum gray scale value, the set gray scale value, the maximum voltage value, the set voltage value and the first node gray scale value, the voltage value corresponding to the first node gray scale value in the first gray scale interval is adjusted to the corresponding first target voltage value by using a linear interpolation method, the voltage value corresponding to the second node gray scale value in the second gray scale interval is adjusted to the corresponding second target voltage value by using a coefficient matrix method, the adjustment speed of the Gamma curve in the high gray scale interval by using the linear interpolation method is high, the adjustment speed of the Gamma curve in the low gray scale interval by using the coefficient matrix method is high, and the Gamma adjustment efficiency of the OLED module is improved.
EXAMPLE III
Fig. 4 is a schematic structural diagram of an OLED module Gamma adjustment device according to a third embodiment of the present invention, as shown in fig. 4, on the basis of the third embodiment, the device includes:
a maximum gray scale value obtaining module 310, configured to obtain a maximum gray scale value corresponding to the OLED module;
a defined gray level value obtaining module 320, configured to obtain a defined gray level value according to the maximum gray level value and a set Gamma curve;
a first target voltage value 330 obtaining module, configured to obtain, according to the maximum grayscale value, the defined grayscale value, the maximum voltage value, the defined voltage value, and the first node grayscale value, a first target voltage value corresponding to each first node grayscale value in a first grayscale interval formed by the maximum grayscale value and the defined grayscale value by using a linear interpolation method;
a first target voltage value adjusting module 340, configured to adjust a voltage value corresponding to the first node gray scale value in the first gray scale interval to the corresponding first target voltage value;
a second target voltage value obtaining module 350, configured to obtain, by using a coefficient matrix method, a second target voltage value corresponding to each second node gray scale value in a second gray scale interval formed by the defined gray scale value and the minimum set gray scale value;
the second target voltage value adjusting module 360 is configured to adjust the voltage value corresponding to the second node gray scale value in the second gray scale interval to the corresponding second target voltage value.
Optionally, the Gamma adjusting device may further include a maximum voltage value obtaining module and a defined voltage value obtaining module, where the maximum voltage value obtaining module is configured to obtain a maximum voltage value corresponding to the maximum gray-scale value according to the first target brightness and the first target color temperature; and the defining voltage value acquisition module is used for acquiring defining voltage values corresponding to the defining gray-scale values according to the second target brightness and the second target color temperature. The first target voltage value obtaining module is further configured to obtain a first target voltage value corresponding to the first node gray scale value according to the maximum gray scale value, the defined gray scale value, the maximum voltage value, the defined voltage value, and the first node gray scale value.
Optionally, the Gamma adjusting device may further include a set gray value obtaining module and a set voltage value obtaining module. The set gray scale value acquisition module is used for acquiring a set gray scale value according to the maximum gray scale value and the set Gamma curve; wherein, the set gray scale value is an adjacent gray scale value of the maximum gray scale value; the set voltage value acquisition module is used for acquiring a set voltage value corresponding to the set gray-scale value according to the third target brightness and the third target color temperature; the first target voltage value obtaining module is further configured to obtain a first target voltage value corresponding to the first node gray scale value according to the maximum gray scale value, the set gray scale value, the maximum voltage value, the set voltage value, and the first node gray scale value.
Optionally, the Gamma adjusting device may further include a coefficient matrix obtaining module, where the coefficient matrix obtaining module is configured to obtain, according to the defined voltage value corresponding to the defined gray-scale value and the set Gamma curve, a coefficient matrix corresponding to each gray-scale value of the second node.
The embodiment of the invention utilizes a linear interpolation method to adjust the voltage value corresponding to the gray scale value of each first node in the first gray scale interval to the corresponding first target voltage value, utilizes a coefficient matrix method to adjust the voltage value corresponding to the gray scale value of each second node in the second gray scale interval to the corresponding second target voltage value, overcomes the defect that the adjustment speed of the linear interpolation method or the coefficient matrix method to the Gamma curve of the high gray scale interval and the low gray scale interval of the OLED module is inconsistent, and the first gray scale interval is formed by the maximum gray scale value and the defined gray scale value, the second gray scale interval is formed by the defined gray scale value and the minimum set gray scale value, the first gray scale interval is a high gray scale interval relative to the second gray scale interval, the Gamma curve of the high gray scale interval is adjusted quickly by using a linear interpolation method, and the Gamma curve of the low gray scale interval is adjusted quickly by using a coefficient matrix method, so that the Gamma adjustment efficiency of the OLED module is improved.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. An OLED module Gamma adjusting method is characterized by comprising the following steps:
acquiring a maximum gray scale value corresponding to the OLED module;
acquiring a defined gray scale value according to the maximum gray scale value and a set Gamma curve;
forming a first gray scale interval by the maximum gray scale value and the defined gray scale value, wherein the first gray scale interval comprises a plurality of first node gray scale values, and acquiring a first target voltage value corresponding to each first node gray scale value by using a linear interpolation method;
adjusting the voltage value corresponding to the first node gray scale value in the first gray scale interval to the corresponding first target voltage value;
the defined gray scale value and the minimum set gray scale value form a second gray scale interval, the second gray scale interval comprises a plurality of second node gray scale values, and a coefficient matrix method is used for obtaining a second target voltage value corresponding to each second node gray scale value;
and adjusting the voltage value corresponding to the second node gray scale value in the second gray scale interval to the corresponding second target voltage value.
2. The method of claim 1, wherein the obtaining the first target voltage value corresponding to each gray-scale value of the first node by using a linear interpolation method comprises:
acquiring a maximum voltage value corresponding to the maximum gray-scale value and a defined voltage value corresponding to the defined gray-scale value;
and acquiring a first target voltage value corresponding to the first node gray scale value according to the maximum gray scale value, the defined gray scale value, the maximum voltage value, the defined voltage value and the first node gray scale value.
3. The method for adjusting Gamma of an OLED module according to claim 2, wherein the obtaining the maximum voltage value corresponding to the maximum gray scale value and the defining voltage value corresponding to the defining gray scale value comprises:
acquiring a maximum voltage value corresponding to the maximum gray scale value according to the first target brightness and the first target color temperature;
and acquiring a defined voltage value corresponding to the defined gray-scale value according to the second target brightness and the second target color temperature.
4. The method for Gamma adjustment of an OLED module according to claim 1, wherein before the obtaining of the first target voltage value corresponding to each gray level of the first node by linear interpolation, the method further comprises:
acquiring a set gray scale value according to the maximum gray scale value and the set Gamma curve; wherein, the set gray scale value is an adjacent gray scale value of the maximum gray scale value;
the obtaining of the first target voltage value corresponding to each first node gray scale value by using a linear interpolation method includes:
acquiring a maximum voltage value corresponding to the maximum gray scale value and a set voltage value corresponding to the set gray scale value;
and acquiring a first target voltage value corresponding to the first node gray scale value according to the maximum gray scale value, the set gray scale value, the maximum voltage value, the set voltage value and the first node gray scale value.
5. The OLED module Gamma adjustment method according to claim 4, wherein the obtaining of the maximum voltage value corresponding to the maximum gray scale value and the setting voltage value corresponding to the setting gray scale value comprises:
acquiring a maximum voltage value corresponding to the maximum gray scale value according to the first target brightness and the first target color temperature;
and acquiring a set voltage value corresponding to the set gray scale value according to the third target brightness and the third target color temperature.
6. The method for adjusting Gamma of an OLED module according to claim 1, wherein the obtaining a second target voltage value corresponding to each gray level value of the second node by using a coefficient matrix method includes:
acquiring a coefficient matrix corresponding to the gray scale value of each second node according to the defined voltage value corresponding to the defined gray scale value and the set Gamma curve;
and acquiring a second target voltage value corresponding to the second node gray-scale value according to the coefficient matrix and the defined voltage value.
7. An OLED module Gamma adjusting device is characterized by comprising:
the maximum gray scale value acquisition module is used for acquiring the maximum gray scale value corresponding to the OLED module;
the defining gray scale value obtaining module is used for obtaining a defining gray scale value according to the maximum gray scale value and a set Gamma curve;
the first target voltage value acquisition module is used for acquiring a first target voltage value corresponding to each first node gray scale value in a first gray scale interval formed by the maximum gray scale value and the defined gray scale value by using a linear interpolation method;
the first target voltage value adjusting module is used for adjusting the voltage value corresponding to the first node gray scale value in the first gray scale interval to the corresponding first target voltage value;
the second target voltage value acquisition module is used for acquiring a second target voltage value corresponding to each second node gray scale value in a second gray scale interval formed by the defined gray scale value and the minimum set gray scale value by using a coefficient matrix method;
and the second target voltage value adjusting module is used for adjusting the voltage value corresponding to the second node gray scale value in the second gray scale interval to the corresponding second target voltage value.
8. The device for adjusting Gamma of an OLED module according to claim 7, further comprising:
the maximum voltage value acquisition module is used for acquiring a maximum voltage value corresponding to the maximum gray-scale value according to the first target brightness and the first target color temperature;
the definition voltage value acquisition module is used for acquiring definition voltage values corresponding to the definition gray-scale values according to the second target brightness and the second target color temperature;
the first target voltage value obtaining module is further configured to obtain a first target voltage value corresponding to the first node gray scale value according to the maximum gray scale value, the defined gray scale value, the maximum voltage value, the defined voltage value, and the first node gray scale value.
9. The device for adjusting Gamma of an OLED module according to claim 7, further comprising:
the set gray scale value acquisition module is used for acquiring a set gray scale value according to the maximum gray scale value and the set Gamma curve; wherein, the set gray scale value is an adjacent gray scale value of the maximum gray scale value;
the set voltage value acquisition module is used for acquiring a set voltage value corresponding to the set gray-scale value according to the third target brightness and the third target color temperature;
the first target voltage value obtaining module is further configured to obtain a first target voltage value corresponding to the first node gray scale value according to the maximum gray scale value, the set gray scale value, the maximum voltage value corresponding to the maximum gray scale value, the set voltage value, and the first node gray scale value.
10. The device for adjusting Gamma of an OLED module according to claim 7, further comprising:
and the coefficient matrix acquisition module is used for acquiring the coefficient matrix corresponding to the gray scale value of each second node according to the defined voltage value corresponding to the defined gray scale value and the set Gamma curve.
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| CN112581912B (en) * | 2019-09-29 | 2022-08-09 | 上海和辉光电股份有限公司 | Display compensation method, display compensation device and electronic equipment |
| CN112700750B (en) * | 2019-10-22 | 2022-06-17 | 上海和辉光电股份有限公司 | Luminance uniformity control method, luminance uniformity control device, and electronic apparatus |
| CN110738960B (en) * | 2019-11-29 | 2021-02-02 | 上海天马有机发光显示技术有限公司 | Display device and control method and device thereof |
| CN112885297B (en) * | 2019-11-29 | 2022-02-11 | 敦泰电子股份有限公司 | Gamma setting generation method of display panel and gamma device |
| CN110675818B (en) * | 2019-12-03 | 2020-05-19 | 武汉精立电子技术有限公司 | Curve matching-based module Gamma correction method and system |
| CN111524484B (en) * | 2020-04-30 | 2022-08-09 | 苏州佳智彩光电科技有限公司 | Rapid Gamma adjustment method and one-time burning OTP system |
| CN113066415B (en) * | 2021-03-01 | 2023-01-24 | 惠科股份有限公司 | Display panel charging method and device and display terminal |
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