CN114464123B - Gamma debugging method and gamma debugging device for display panel - Google Patents
Gamma debugging method and gamma debugging device for display panel Download PDFInfo
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- CN114464123B CN114464123B CN202210297994.2A CN202210297994A CN114464123B CN 114464123 B CN114464123 B CN 114464123B CN 202210297994 A CN202210297994 A CN 202210297994A CN 114464123 B CN114464123 B CN 114464123B
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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
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The embodiment of the invention provides a gamma debugging method and a gamma debugging device for a display panel, which relate to the technical field of display, and are used for shortening gamma debugging time and improving debugging precision. The gamma debugging method of the display panel comprises the following steps: setting at least one first brightness group according to the light-emitting driving parameters corresponding to the display brightness values in the display panel, wherein the first brightness group comprises a first display brightness value and a second display brightness value, and the light-emitting driving parameters corresponding to the first display brightness value and the second display brightness value are the same; debugging and obtaining gamma voltage of the first display brightness value under the gray scale of the binding point; constructing a first nonlinear model according to gamma voltage and binding brightness of the first display brightness value under the binding point gray scale; and calculating the gamma voltage of the second display brightness value under the gray scale of the binding point according to the first nonlinear model and the binding point brightness of the second display brightness value under the gray scale of the binding point.
Description
[ field of technology ]
The present invention relates to the field of display technologies, and in particular, to a gamma adjustment method and a gamma adjustment device for a display panel.
[ background Art ]
The gamma of each display panel is usually independently adjusted before the display panel leaves the factory because the gamma of different display panels is affected by the instability of the process. In the existing debugging mode, gamma under each display brightness value of the display panel needs to be debugged respectively, and the debugging time is long, so that the panel production time is increased, and the productivity is affected.
[ invention ]
In view of this, the embodiments of the present invention provide a gamma debugging method and a gamma debugging device for a display panel, which can shorten the gamma debugging time of the display panel and improve the debugging precision.
In one aspect, an embodiment of the present invention provides a gamma debugging method for a display panel, including:
setting at least one first brightness group according to the luminous driving parameters corresponding to the display brightness values in the display panel, wherein the first brightness group comprises a first display brightness value and a second display brightness value, and the luminous driving parameters corresponding to the first display brightness value and the second display brightness value are the same;
debugging and obtaining gamma voltage of the first display brightness value under the gray scale of the binding point;
constructing a first nonlinear model according to the gamma voltage and the binding brightness of the first display brightness value under the binding point gray scale;
and calculating the gamma voltage of the second display brightness value under the gray scale of the binding point according to the first nonlinear model and the binding point brightness of the second display brightness value under the gray scale of the binding point.
In another aspect, an embodiment of the present invention provides a gamma debugging device for a display device, including:
the setting module is used for setting at least one first brightness group according to the light-emitting driving parameters corresponding to the display brightness values in the display panel, wherein the first brightness group comprises a first display brightness value and a second display brightness value, and the light-emitting driving parameters corresponding to the first display brightness value and the second display brightness value are the same;
the first voltage debugging module is electrically connected with the setting module and is used for debugging and acquiring gamma voltage of the first display brightness value under the gray scale of the binding point;
the first model building module is respectively and electrically connected with the setting module and the first voltage debugging module and is used for building a first nonlinear model by gamma voltage and binding brightness of the first display brightness value under the binding point gray scale;
the voltage calculation module is respectively and electrically connected with the setting module and the first model construction module and is used for calculating gamma voltage of the second display brightness value under the gray scale of the binding point according to the binding point brightness of the first nonlinear model and the second display brightness value under the gray scale of each binding point.
One of the above technical solutions has the following beneficial effects:
in the embodiment of the invention, first, according to the light-emitting driving parameters corresponding to the display brightness values in the display panel, the first display brightness value and the second display brightness value with the same light-emitting driving parameters are divided into the same first brightness group, then the gamma voltage of the first display brightness value under the gray level of the binding point is debugged, and a first nonlinear model is constructed according to the debugged gamma voltage, and the first nonlinear model can represent the nonlinear relation between the gamma voltage and the binding point brightness, so that the response relation of the light-emitting brightness of the light-emitting element along with the data voltage is more attached. Because the second display brightness value is the same as the first display brightness value in the corresponding light emitting condition, the response relation of the light emitting brightness of the light emitting element under the two display brightness values along with the data voltage is similar, and therefore, according to the constructed first nonlinear model, the gamma voltage of the second display brightness value under the gray scale of the binding point can be directly calculated, and the gamma voltage of the second display brightness value under the gray scale of the binding point is not required to be independently debugged.
In summary, the embodiment of the invention establishes the panel luminescence model (the first nonlinear model) of the display panel based on the gamma voltage of a certain display brightness value under the gray scale of the binding point by analyzing the luminescence characteristic of the panel, so that the gamma voltages of other display brightness values under the same luminescence condition under the gray scale of the binding point can be directly calculated and known. By adopting the debugging mode, on one hand, the debugging times are saved to a great extent, the debugging time is shortened, and on the other hand, compared with a linear interpolation algorithm in the prior art, the gamma voltage obtained by calculation is closer to the gamma voltage obtained by actual debugging, and the accuracy of the gamma voltage is higher.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flowchart of a gamma debugging method for a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a relationship between luminance and gamma voltage according to an embodiment of the present invention;
FIG. 3 is another schematic diagram of the correspondence between the luminance and the gamma voltage according to the embodiment of the present invention;
FIG. 4 is a flowchart of another gamma debugging method for a display panel according to an embodiment of the present invention;
FIG. 5 is a flowchart of a gamma debugging method of a display panel according to an embodiment of the present invention;
FIG. 6 is a flowchart of a gamma debugging method of a display panel according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a gamma debugging device for a display panel according to an embodiment of the present invention;
fig. 8 is a schematic diagram of another structure of a gamma adjustment device for a display panel according to an embodiment of the invention.
[ detailed description ] of the invention
For a better understanding of the technical solution of the present invention, the following detailed description of the embodiments of the present invention refers to the accompanying drawings.
It should be understood that the described embodiments are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
It should be understood that although the terms first, second, and third may be used in embodiments of the present invention to describe display luminance values, these display luminance values should not be limited to these terms. These terms are only used to distinguish display luminance values from each other. For example, a first display luminance value may also be referred to as a second display luminance value, and similarly, a second display luminance value may also be referred to as a first display luminance value without departing from the scope of embodiments of the present invention.
Under different application scenarios, the display panel needs to call different display brightness values (Display Brightness Value, DBV). For example, when the display panel is applied in the night mode, the display panel needs to call a lower display brightness value, and the brightness of each gray scale corresponding to the lower display brightness value is correspondingly lower; when the display panel is applied in the daytime mode, the display panel needs to call a higher display brightness value, and the brightness of each gray scale corresponding to the higher display brightness value is correspondingly higher.
In the prior art, when gamma adjustment is performed before the display panel leaves the factory, it is generally necessary to perform the gamma adjustment for each display brightness value of the display panel. Under the condition that the number of the display brightness values and the number of the gray scales of the binding points are large, adjusting each display brightness value one by one can lead to overlong debugging time and complex whole debugging process, thereby greatly increasing the production time of the display panel and influencing the productivity.
In this regard, a regulation and control manner based on a linear difference algorithm is proposed in the prior art. In the regulation and control mode, only the gamma voltages of partial display brightness values under the gray scale of the binding points are debugged, and then the gamma voltages of other display brightness values under the gray scale of the binding points are calculated through a linear interpolation algorithm.
However, due to the influence of the characteristics of the luminescent materials, the response of the luminescent brightness of the luminescent element in the current display panel along with the data voltage is nonlinear, and the linear interpolation algorithm cannot accurately match the characteristics of the luminescent materials of the luminescent element, which results in gamma offset of the gamma voltages of other calculated display brightness values under the gray scale of the binding point, and the gamma offset of the gamma voltages of the gray scale of the non-binding point is more serious due to linear superposition. Therefore, the gamma debugging is performed by adopting the existing linear difference algorithm, and the debugging time can be shortened, but the debugging precision is not high, and the panel quality can be still affected.
In this regard, the embodiment of the invention provides a gamma debugging method for a display panel, by adopting the gamma debugging method, the debugging time can be shortened, and higher debugging precision can be ensured.
As shown in fig. 1, fig. 1 is a flowchart of a gamma debugging method for a display panel according to an embodiment of the present invention, where the gamma debugging method includes:
step S1: and setting at least one first brightness group according to the light-emitting driving parameters corresponding to the display brightness values in the display panel, wherein the first brightness group comprises a first display brightness value and a second display brightness value, and the light-emitting driving parameters corresponding to the first display brightness value and the second display brightness value are the same.
That is, when the display panel invokes the first display luminance value and the second display luminance value, the light emitting conditions corresponding to the two display luminance values are the same, for example, the power supply voltage V received by the pixel circuit in the display panel under the two display luminance values PVDD The duty_e of the emission control signal received by the pixel circuit is the same as the emission driving parameter. At this time, the display panel changes the light emission luminance of the light emitting element at each gray level only by changing the data voltage level at the first display luminance value and the second display luminance value.
Step S2: and debugging and obtaining the gamma voltage of the first display brightness value under the gray scale of the binding point.
Step S3: and constructing a first nonlinear model according to the gamma voltage and the binding brightness of the first display brightness value under the binding point gray scale.
Step S4: and calculating the gamma voltage of the second display brightness value under the gray scale of the binding point according to the first nonlinear model and the binding point brightness of the second display brightness value under the gray scale of the binding point.
In the embodiment of the invention, first, according to the light-emitting driving parameters corresponding to the display brightness values in the display panel, the first display brightness value and the second display brightness value with the same light-emitting driving parameters are divided into the same first brightness group, then the gamma voltage of the first display brightness value under the gray level of the binding point is debugged, and a first nonlinear model is constructed according to the debugged gamma voltage, and the first nonlinear model can represent the nonlinear relation between the gamma voltage and the binding point brightness, so that the response relation of the light-emitting brightness of the light-emitting element along with the data voltage is more attached. Because the second display brightness value is the same as the first display brightness value in the corresponding light emitting condition, the response relation of the light emitting brightness of the light emitting element under the two display brightness values along with the data voltage is similar, and therefore, according to the constructed first nonlinear model, the gamma voltage of the second display brightness value under the gray scale of the binding point can be directly calculated, and the gamma voltage of the second display brightness value under the gray scale of the binding point is not required to be independently debugged.
In summary, the embodiment of the invention establishes the panel luminescence model (the first nonlinear model) of the display panel based on the gamma voltage of a certain display brightness value under the gray scale of the binding point by analyzing the luminescence characteristic of the panel, so that the gamma voltages of other display brightness values under the same luminescence condition under the gray scale of the binding point can be directly calculated and known. By adopting the debugging mode, on one hand, the debugging times are saved to a great extent, the debugging time is shortened, and on the other hand, compared with a linear interpolation algorithm in the prior art, the gamma voltage obtained by calculation is closer to the gamma voltage obtained by actual debugging, and the accuracy of the gamma voltage is higher.
It should be noted that, the number of the first display luminance values included in the first luminance group may be one or more, and when the first luminance group includes a plurality of first display luminance values, the first nonlinear model is constructed according to the gamma voltages and the binding luminance of the plurality of first display luminance values under the binding point gray scale.
In one possible embodiment, the light emission driving parameter includes a power supply voltage V received by a pixel circuit in the display panel PVDD And/or duty_e of the light emission control signal received by the pixel circuit and/or maximum value V of the gray scale voltage adjustable range in the display panel GMP And/or, minimum value V of gray-scale voltage adjustable range in display panel GsP And/or a refresh rate f of the display panel.
At this time, when the display panel calls the first display brightness value and the second display brightness value, the light emitting conditions based on the two display brightness values are the same, the gamma voltages of the two display brightness values are more consistent with the nonlinear model corresponding to the binding point brightness, and the accuracy of the gamma voltages of the second display brightness value calculated by the first nonlinear model under the binding point gray scale is improved to a greater extent.
In one possible embodiment, the first nonlinear model is v=al b +c, wherein V is gamma voltage, L is binding point brightness, and a, b and c are constants respectively.
Specifically, when the gamma voltage and the binding luminance of the first display luminance value under the binding point gray scale are utilized to construct a first nonlinear model, the values of a, b and c can be obtained, wherein a reflects the mobility and channel design parameters of the transistor in the pixel circuit, b reflects the luminance response parameters of the luminescent material in the luminescent element to the data voltage, and c reflects the threshold voltage parameters of the transistor in the pixel circuit. That is, a and c are related to the characteristics of the transistors, b is related to the characteristics of the luminescent material, and a, b and c can be used to characterize the transistor characteristic parameters and the luminescent material characteristic parameters of the display panel, so that the first nonlinear model can simulate the luminescent characteristics of the display panel, and the gamma voltage under the gray scale of the binding point calculated according to the first nonlinear model is more consistent with the gamma voltage of the display panel based on the actual luminescent characteristics.
In this regard, the inventors have also validated:
the display panel has a display luminance value 1, a display luminance value 2, a display luminance value 3 and a display luminance value 4, and the light-emitting driving parameters corresponding to the four display luminance values are the same. The brightness corresponding to the display brightness value 1 under the maximum gray level is 500nit respectively, the brightness corresponding to the display brightness value 2 under the maximum gray level is 420nit respectively, the brightness corresponding to the display brightness value 3 under the maximum gray level is 100nit respectively, and the brightness corresponding to the display brightness value 4 under the maximum gray level is 200nit respectively.
The inventor firstly debugs the gamma voltages of the display brightness value 1, the display brightness value 2, the display brightness value 3 and the display brightness value 4 under the gray scale of the binding point, and generates a curve schematic diagram of the corresponding relation between the luminous brightness and the gamma voltage shown in fig. 2 according to the gamma voltages of the display brightness value 1, the display brightness value 2 and the display brightness value 3 under the gray scale of the binding point. In fig. 2, curves reg_r500, reg_g500, and reg_b500 respectively represent the corresponding relationship between the emission luminance of the red light emitting element, the green light emitting element, and the blue light emitting element and the gamma voltage at the display luminance value 1 obtained by actual debugging, curves reg_r420, reg_g420, and reg_b420 respectively represent the corresponding relationship between the emission luminance of the red light emitting element, the green light emitting element, and the blue light emitting element and the gamma voltage at the display luminance value 2 obtained by actual debugging, and curves reg_r100, reg_g100, and reg_b100 respectively represent the corresponding relationship between the emission luminance of the red light emitting element, the green light emitting element, and the blue light emitting element and the gamma voltage at the display luminance value 3 obtained by actual debugging.
And constructing a first nonlinear model according to the gamma voltages of the display brightness value 1, the display brightness value 2 and the display brightness value 3 under the gray level of the binding point, calculating the gamma voltage of the display brightness value 4 under the gray level of the binding point according to the model, and generating another curve schematic diagram of the corresponding relation between the luminous brightness and the gamma voltage as shown in fig. 3. In fig. 3, curves R-c, G-c and B-c respectively represent the calculated correspondence between the emission luminance of the red light emitting element, the green light emitting element and the blue light emitting element and the gamma voltage at the display luminance value 4, and curves R-o, G-o and B-o respectively represent the correspondence between the emission luminance of the red light emitting element, the green light emitting element and the blue light emitting element and the gamma voltage at the display luminance value 4 obtained by actual debugging. The comparison curve shows that the calculated gamma voltage of the display brightness value 4 is basically consistent with the gamma voltage of the display brightness value 4 obtained by actual debugging, and the error is less than 0.3%.
In one possible implementation, the first display luminance value corresponds to a luminance at the maximum gray level that is greater than the second display luminance value corresponds to a luminance at the maximum gray level.
That is, when a plurality of display luminance values having the same light emission driving parameter are acquired, the maximum display luminance value is defined as the first display luminance value. The first luminance group includes three display luminance values, the luminance corresponding to the three display luminance values at the maximum gray level is 500nit, 200nit and 100nit, the display luminance value corresponding to the 500nit luminance is defined as a first display luminance value, the display luminance value corresponding to the 200nit and 100nit luminance is defined as two second display luminance values, then the first nonlinear model is constructed according to the gamma voltages of the display luminance values corresponding to the 500nit luminance at the gray level of each binding point, and then the gamma voltages of the display luminance values corresponding to the 200nit and 100nit luminance at the gray level of each binding point are calculated, and at this time, the average display panel of each block can save 25-35 s of debugging time.
Since the first nonlinear model constructed by the gamma voltage with the high brightness level is more attached to the actual light emitting characteristic of the display panel, the accuracy of the obtained gamma voltage can be further improved by calculating the gamma voltage with the low brightness level according to the gamma voltage with the high brightness level.
In a possible implementation manner, as shown in fig. 4, fig. 4 is another flowchart of a gamma debugging method of a display panel provided by an embodiment of the present invention, where the gamma debugging method further includes:
step S5: according to the first nonlinear model and the unbound light intensity of the first display brightness value under the unbound light gray level, calculating the gamma voltage of the first display brightness value under the unbound light gray level; and calculating the gamma voltage of the second display brightness value under the gray level of the unbound point according to the first nonlinear model and the unbound point brightness of the second display brightness value under the gray level of the unbound point.
In the prior art, the gamma voltage of each display brightness value under the gray level of the unbinding point is also calculated according to the gamma voltage under the gray level of the binding point through a linear difference algorithm, and when the gamma voltage of the display brightness value under the gray level of the binding point has gamma offset, the gamma voltage under the gray level of the unbinding point is subjected to linear superposition, so that the gamma offset is more serious. In the embodiment of the invention, after the first nonlinear model is constructed, the gamma voltages of the first display brightness value and the second display brightness value under the gray level of the unbinding point can be further calculated through the first nonlinear model, and the calculated gamma voltages of the display brightness values under the gray level of the unbinding point are more attached to the gamma voltages obtained by actual debugging because the first nonlinear model is attached to the actual luminous characteristics of the display panel.
In a possible implementation manner, the plurality of display luminance values further includes a third display luminance value, and the light emission driving parameter corresponding to the third display luminance value is different from the light emission driving parameter corresponding to the first display luminance value. As shown in fig. 5, fig. 5 is a flowchart of a gamma debugging method of a display panel according to an embodiment of the present invention, where the gamma debugging method further includes:
step S6: and debugging and obtaining the gamma voltage of the third display brightness value under the gray scale of the binding point.
In the above manner, when the light emitting condition of a certain or a plurality of display brightness values is different from the light emitting condition of any other display brightness value, the gamma voltage of the part of display brightness values under the gray scale of the binding point can be directly debugged and obtained, so that the debugging accuracy of the gamma voltage of the part of display brightness values is improved.
Further, as shown in fig. 6, fig. 6 is a flowchart of a gamma debugging method of a display panel according to an embodiment of the present invention, where the gamma debugging method further includes:
step S7: and constructing a second nonlinear model according to the gamma voltage and the binding brightness of the third display brightness value under the binding point gray scale.
Step S8: and calculating the gamma voltage of the third display brightness value under the gray level of the unbound point according to the second nonlinear model and the unbound point brightness of the third display brightness value under the gray level of the unbound point.
After the gamma voltage of the third display brightness value under the gray level of the binding point is debugged and obtained, compared with the gamma voltage of the third display brightness value under the gray level of the unbinding point which is calculated directly through a linear difference algorithm, the gamma voltage of the third display brightness value under the gray level of the unbinding point is more attached to the gamma voltage obtained through actual debugging by constructing a second nonlinear model through utilizing the gamma voltage under the gray level of the binding point and calculating the gamma voltage of the third display brightness value under the gray level of the unbinding point through the second nonlinear model.
Based on the same inventive concept, the embodiment of the invention also provides a gamma debugging device of a display device, as shown in fig. 7, fig. 7 is a schematic structural diagram of the gamma debugging device of the display panel provided by the embodiment of the invention, where the gamma debugging device includes a setting module 1, a first voltage debugging module 2, a first model building module 3 and a voltage calculating module 4.
The setting module 1 is configured to set at least one first luminance group according to light emission driving parameters corresponding to a plurality of display luminance values in the display panel, where the first luminance group includes a first display luminance value and a second display luminance value, and the light emission driving parameters corresponding to the first display luminance value and the second display luminance value are the same.
The first voltage debugging module 2 is electrically connected with the setting module 1 and is used for debugging and acquiring gamma voltage of the first display brightness value under the gray scale of the binding point.
The first model building module 3 is electrically connected with the setting module 1 and the first voltage debugging module 2 respectively and is used for building a first nonlinear model by gamma voltage and binding brightness of the first display brightness value under the binding point gray scale.
The voltage calculation module 4 is electrically connected with the setting module 1 and the first model construction module 3 respectively, and is used for calculating gamma voltage of the second display brightness value under the gray scale of the binding point according to the binding point brightness of the first nonlinear model and the second display brightness value under the gray scale of each binding point.
According to the embodiment of the invention, the panel luminescence model (the first nonlinear model) of the display panel is built based on the gamma voltage of a certain display brightness value under the gray level of the binding point by analyzing the panel luminescence characteristics, so that the gamma voltages of other display brightness values under the same luminescence condition under the gray level of the binding point can be directly calculated and obtained. By adopting the structure, on one hand, the debugging times are saved to a great extent, the debugging time is shortened, and on the other hand, the higher accuracy of the gamma voltage obtained by calculation is also improved.
In a possible implementation manner, the plurality of display luminance values further includes a third display luminance value, and the light emission driving parameter corresponding to the third display luminance value is different from the light emission driving parameter corresponding to the first display luminance value. As shown in fig. 8, fig. 8 is another schematic structural diagram of a gamma debugging device for a display panel according to an embodiment of the present invention, where the gamma debugging device further includes a second voltage debugging module 5, and the second voltage debugging module 5 is electrically connected to the setting module 1 and is configured to debug and obtain a gamma voltage of a third display brightness value under a binding point gray scale.
When the lighting condition of a certain or a plurality of display brightness values is different from the lighting condition of any other display brightness value, the second voltage debugging module 5 can directly debug and acquire the gamma voltage of the display brightness value under the gray scale of the binding point, so as to improve the debugging accuracy of the gamma voltage of the display brightness value.
Further, referring to fig. 8 again, the gamma debugging device further includes a second model building module 6, where the second model building module 6 is electrically connected to the setting module 1 and the second voltage debugging module 5, respectively, and is used for building a second nonlinear model by using gamma voltages and binding brightnesses of the third display brightness values under the binding point gray scale.
The voltage calculation module 4 is further electrically connected to the second model building module 6, and is further configured to calculate, according to the second nonlinear model and the unbound light intensity of the third display brightness value under the unbound light gray level, the gamma voltage of the third display brightness value under the unbound light gray level.
After the gamma voltage of the third display brightness value under the gray level of the binding point is debugged and obtained, compared with the gamma voltage of the third display brightness value under the gray level of the unbinding point which is calculated directly through a linear difference algorithm, in the embodiment of the invention, the second model construction module 6 constructs the second nonlinear model by utilizing the gamma voltage under the gray level of the binding point, and the voltage calculation module 4 further calculates the gamma voltage of the third display brightness value under the gray level of the unbinding point by utilizing the second nonlinear model, so that the gamma voltage of the third display brightness value under the gray level of the unbinding point can be more attached to the gamma voltage obtained through actual debugging.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the invention.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (9)
1. The gamma debugging method of the display panel is characterized by comprising the following steps of:
setting at least one first brightness group according to the luminous driving parameters corresponding to the display brightness values in the display panel, wherein the first brightness group comprises a first display brightness value and a second display brightness value, and the luminous driving parameters corresponding to the first display brightness value and the second display brightness value are the same;
debugging and obtaining gamma voltage of the first display brightness value under the gray scale of the binding point;
constructing a first nonlinear model according to the gamma voltage and the binding brightness of the first display brightness value under the binding point gray scale;
calculating gamma voltage of the second display brightness value under the gray scale of the binding point according to the first nonlinear model and the binding point brightness of the second display brightness value under the gray scale of the binding point;
the first nonlinear model is v=al b +c, wherein V is the gamma voltage, L is the binding point brightness, a, b and c are constants respectively, a reflects the mobility and channel design parameters of transistors in the pixel circuit, b reflects the brightness response parameters of luminescent materials in the luminescent element to the data voltage, and c reflects the threshold voltage parameters of the transistors in the pixel circuit.
2. The gamma adjustment method of a display panel according to claim 1, wherein the light emission driving parameters include:
the power supply voltage V received by the pixel circuit in the display panel PVDD And/or the Duty ratio duty_e of the light emitting control signal received by the pixel circuit and/or the maximum value V of the gray scale voltage adjustable range in the display panel GMP And/or, minimum value V of gray scale voltage adjustable range in the display panel GsP And/or a refresh rate f of the display panel.
3. The gamma adjustment method of claim 1, wherein,
the brightness corresponding to the first display brightness value under the maximum gray level is larger than the brightness corresponding to the second display brightness value under the maximum gray level.
4. The gamma debugging method of a display panel according to claim 1, further comprising:
according to the first nonlinear model and the unbound point brightness of the first display brightness value under the unbound point gray scale, calculating the gamma voltage of the first display brightness value under the unbound point gray scale;
and calculating gamma voltage of the second display brightness value under the gray level of the unbound point according to the first nonlinear model and the unbound point brightness of the second display brightness value under the gray level of the unbound point.
5. The gamma adjustment method of claim 1, wherein,
the plurality of display brightness values further comprise a third display brightness value, and the light-emitting driving parameters corresponding to the third display brightness value are different from the light-emitting driving parameters corresponding to the first display brightness value;
the gamma debugging method further comprises the following steps: and debugging and obtaining the gamma voltage of the third display brightness value under the gray scale of the binding point.
6. The gamma debugging method of a display panel according to claim 5, further comprising:
constructing a second nonlinear model according to the gamma voltage and the binding brightness of the third display brightness value under the binding point gray scale;
and calculating gamma voltage of the third display brightness value under the gray scale of the unbound point according to the second nonlinear model and the brightness of the unbound point of the third display brightness value under the gray scale of the unbound point.
7. A gamma adjustment device for a display device, comprising:
the setting module is used for setting at least one first brightness group according to the light-emitting driving parameters corresponding to the display brightness values in the display panel, wherein the first brightness group comprises a first display brightness value and a second display brightness value, and the light-emitting driving parameters corresponding to the first display brightness value and the second display brightness value are the same;
the first voltage debugging module is electrically connected with the setting module and is used for debugging and acquiring gamma voltage of the first display brightness value under the gray scale of the binding point;
the first model building module is respectively and electrically connected with the setting module and the first voltage debugging module and is used for building a first nonlinear model by gamma voltage and binding brightness of the first display brightness value under the binding point gray scale;
the voltage calculation module is respectively and electrically connected with the setting module and the first model construction module and is used for calculating gamma voltage of the second display brightness value under the gray scale of each binding point according to the binding point brightness of the first nonlinear model and the second display brightness value under the gray scale of each binding point;
the first nonlinear model is v=al b +c, wherein V is the gamma voltage, L is the binding point brightness, a, b and c are constants respectively, a reflects the mobility and channel design parameters of transistors in the pixel circuit, b reflects the brightness response parameters of luminescent materials in the luminescent element to the data voltage, and c reflects the threshold value of the transistors in the pixel circuitVoltage parameters.
8. The gamma adjustment device of claim 7, wherein the gamma adjustment device comprises a gamma adjustment unit,
the plurality of display brightness values further comprise a third display brightness value, and the light-emitting driving parameters corresponding to the third display brightness value are different from the light-emitting driving parameters corresponding to the first display brightness value;
the gamma debugging device further comprises a second voltage debugging module, wherein the second voltage debugging module is electrically connected with the setting module and is used for debugging and acquiring gamma voltages of the third display brightness value under the gray scale of the binding point.
9. The gamma adjustment device of claim 8, further comprising:
the second model building module is respectively and electrically connected with the setting module and the second voltage debugging module and is used for building a second nonlinear model by gamma voltage and binding brightness of the third display brightness value under the binding point gray scale;
the voltage calculation module is further electrically connected with the second model construction module and is further used for calculating gamma voltage of the third display brightness value under the unbound point gray scale according to the second nonlinear model and the unbound point brightness of the third display brightness value under the unbound point gray scale.
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