CN114464123A - Gamma debugging method and gamma debugging device for display panel - Google Patents

Gamma debugging method and gamma debugging device for display panel Download PDF

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CN114464123A
CN114464123A CN202210297994.2A CN202210297994A CN114464123A CN 114464123 A CN114464123 A CN 114464123A CN 202210297994 A CN202210297994 A CN 202210297994A CN 114464123 A CN114464123 A CN 114464123A
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brightness value
display brightness
display
gray scale
gamma
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CN114464123B (en
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颜伟男
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Wuhan Tianma Microelectronics Co Ltd
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Wuhan Tianma Microelectronics Co Ltd
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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
    • 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
    • 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

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  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Picture Signal Circuits (AREA)
  • Transforming Electric Information Into Light Information (AREA)

Abstract

The embodiment of the invention provides a gamma debugging method and a gamma debugging device of a display panel, relates to the technical field of display, and aims to shorten the gamma debugging time and improve the 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 a plurality of 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 acquiring a gamma voltage of a first display brightness value under a binding point gray scale; constructing a first nonlinear model according to the gamma voltage and the binding luminance of the first display luminance value under the binding gray scale; and calculating the gamma voltage of the second display brightness value under the binding gray scale according to the first nonlinear model and the binding brightness of the second display brightness value under the binding gray scale.

Description

Gamma debugging method and gamma debugging device for display panel
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of display, in particular to a gamma debugging method and a gamma debugging device for a display panel.
[ background of the invention ]
Due to the unstable process, the gamma of different display panels is different, and therefore, before the display panels leave the factory, the gamma of each display panel is usually individually adjusted. In the existing debugging mode, the gamma of each display brightness value of the display panel needs to be respectively debugged, the debugging time is long, and further, the production time of the panel is increased, and the productivity is influenced.
[ summary of the invention ]
In view of this, embodiments of the present invention provide a gamma debugging method and a gamma debugging apparatus for a display panel, which shorten the gamma debugging time of the display panel and improve the debugging accuracy.
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 light-emitting driving parameters corresponding to a plurality of display brightness values in a 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 acquiring the gamma voltage of the first display brightness value under the binding point gray scale;
constructing a first nonlinear model according to the gamma voltage and the binding point 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 binding gray scale according to the first nonlinear model and the binding brightness of the second display brightness value under the binding gray scale.
In another aspect, an embodiment of the present invention provides a gamma debugging apparatus for a display apparatus, including:
the display device comprises a setting module, a display module and a control module, wherein the setting module is used for setting at least one first brightness group according to light-emitting driving parameters corresponding to a plurality of display brightness values in a display panel, 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 used for debugging and acquiring the gamma voltage of the first display brightness value under the binding point gray scale;
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 the gamma voltage and the binding luminance of the first display luminance value under the binding gray scale;
and the voltage calculation module is respectively electrically connected with the setting module and the first model construction module and is used for calculating the gamma voltage of the second display brightness value under the binding gray scale according to the binding brightness of the first nonlinear model and the second display brightness value under each binding gray scale.
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 plurality of 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, so that the gamma voltage of the first display brightness value under the binding point gray scale is debugged, and the first nonlinear model is constructed according to the debugged gamma voltage, and 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 better fitted. 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 elements under the two display brightness values along with the data voltage is similar, so that the gamma voltage of the second display brightness value under the binding point gray scale can be directly calculated according to the constructed first nonlinear model, and the gamma voltage of the second display brightness value under the binding point gray scale does not need to be independently debugged.
In summary, the embodiment of the present invention can directly calculate the gamma voltages of other display luminance values under the same lighting condition at the tie point gray scale by analyzing the lighting characteristics of the panel and establishing the panel lighting model (the first nonlinear model) of the display panel based on the gamma voltages of a certain display luminance value at the tie point gray scale. By adopting the debugging mode, on one hand, the debugging times are saved to a great extent, and 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 needed to be used 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 it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flowchart illustrating a gamma adjustment method for a display panel according to an embodiment of the present invention;
FIG. 2 is a graph illustrating a relationship between luminance and gamma voltage according to an embodiment of the present invention;
FIG. 3 is another graph illustrating a relationship between luminance and gamma voltage according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating a gamma adjustment method for a display panel according to an embodiment of the present invention;
FIG. 5 is a flowchart illustrating a gamma adjustment method for a display panel according to another embodiment of the present invention;
FIG. 6 is a flowchart illustrating a gamma adjustment method for a display panel according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a gamma adjustment apparatus for a display panel according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of another gamma debugging apparatus for a display panel according to an embodiment of the invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present 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 the examples of the present invention 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 type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, and third may be used to describe the display luminance values in the embodiments of the present invention, the display luminance values should not be limited to these terms. These terms are only used to distinguish the display luminance values from each other. For example, the first display luminance value may also be referred to as the second display luminance value, and similarly, the second display luminance value may also be referred to as the first display luminance value, without departing from the scope of embodiments of the present invention.
In different application scenarios, the Display panel needs to call different Display Brightness Values (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 debugging is performed before the display panel leaves the factory, it is usually necessary to perform gamma debugging on each display brightness value of the display panel. Under the condition that the number of display brightness values and binding point gray scales is large, adjusting each display brightness value one by one can result in overlong debugging time and complex debugging process, thereby greatly increasing the production time of the display panel and influencing the productivity.
In view of this, the prior art provides a regulation and control method based on a linear difference algorithm. In the regulation and control mode, only the gamma voltages of partial display brightness values under the binding point gray scale are debugged, and then the gamma voltages of other display brightness values under the binding point gray scale are calculated through a linear interpolation algorithm.
However, due to the influence of the characteristics of the light emitting material, the response of the luminance of the light emitting element in the current display panel with the data voltage is nonlinear, and the above linear interpolation algorithm cannot accurately match the characteristics of the light emitting material of the light emitting element, which results in gamma offset of the gamma voltage of other calculated display luminance values at the binding point gray scale, and the gamma offset is more serious due to linear superposition of the gamma voltage of the non-binding point gray scale. Therefore, the gamma debugging is performed by adopting the existing linear difference algorithm, although the debugging time can be shortened, the debugging precision is not high, and the panel quality is still influenced.
In contrast, the embodiment of the invention provides a gamma debugging method for a display panel, which can shorten the debugging time and ensure higher debugging precision.
As shown in fig. 1, fig. 1 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 includes:
step S1: at least one first brightness group is set according to the light-emitting driving parameters corresponding to a plurality of 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 calls the first display brightness value and the second display brightness value, the light emitting conditions corresponding to the two display brightness values are the same, for example, the power voltage V received by the pixel circuit in the display panel at the two display brightness valuesPVDDAnd the light emitting driving parameters such as the Duty ratio Duty _ E of the light emitting control signal received by the pixel circuit are the same. At this time, the display panel changes the luminance of the light-emitting elements at each gray level only by changing the magnitude of the data voltage to change the first display luminance value and the second display luminance value.
Step S2: and debugging and acquiring the gamma voltage of the first display brightness value under the binding point gray scale.
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 gray scale.
Step S4: and calculating the gamma voltage of the second display brightness value under the binding gray scale according to the first nonlinear model and the binding brightness of the second display brightness value under the binding gray scale.
In the embodiment of the invention, first, according to the light-emitting driving parameters corresponding to the plurality of 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, so that the gamma voltage of the first display brightness value under the binding point gray scale is debugged, and the first nonlinear model is constructed according to the debugged gamma voltage, and 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 better fitted. 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 elements under the two display brightness values along with the data voltage is similar, so that the gamma voltage of the second display brightness value under the binding point gray scale can be directly calculated according to the constructed first nonlinear model, and the gamma voltage of the second display brightness value under the binding point gray scale does not need to be independently debugged.
In summary, the embodiment of the present invention can directly calculate the gamma voltages of other display luminance values under the same lighting condition at the tie point gray scale by analyzing the lighting characteristics of the panel and establishing the panel lighting model (the first nonlinear model) of the display panel based on the gamma voltages of a certain display luminance value at the tie point gray scale. By adopting the debugging mode, on one hand, the debugging times are saved to a great extent, and 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 may be multiple, and when the first luminance group includes multiple first display luminance values, the first nonlinear model is constructed according to the gamma voltages of the multiple first display luminance values at the binding gray scale and the binding luminance.
In one possible embodiment, the light-emitting driving parameter includes a power supply voltage V received by a pixel circuit in the display panelPVDDAnd/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 adjustable range of the gray scale voltage in the display panelGMPAnd/or the minimum value V of the adjustable range of the gray scale voltage in the display panelGsPAnd/or the 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 two display brightness values are based on the same light emitting condition, the gamma voltages of the two display brightness values are more consistent with the nonlinear model corresponding to the binding brightness, and the accuracy of the gamma voltage of the second display brightness value calculated by the first nonlinear model under the binding gray scale is improved to a greater extent.
In one possible embodiment, the first non-linear model is V ═ aLb+ c, where V is the gamma voltage, L is the binding brightness, and a, b, and c are constants, respectively.
Specifically, when the first non-linear model is constructed by using the gamma voltage and the binding luminance of the first display luminance value at the binding gray scale, the values of a, b, and c may be obtained, where a reflects the mobility and channel design parameters of the transistor in the pixel circuit, b reflects the luminance response parameter of the light emitting material in the light emitting element to the data voltage, and c reflects the threshold voltage parameter of the transistor in the pixel circuit. That is, a and c are related to the characteristics of the transistor, b is related to the characteristics of the light emitting material, and a, b, and c can be used to represent the transistor characteristic parameters and the light emitting material characteristic parameters of the display panel, so that the first non-linear model can simulate the light emitting characteristics of the display panel, and the gamma voltage at the tie point gray scale calculated according to the first non-linear model is more suitable for the gamma voltage of the display panel based on the actual light emitting characteristics.
In this regard, the inventors have also verified that:
the display panel has a display brightness value 1, a display brightness value 2, a display brightness value 3 and a display brightness value 4, and the light-emitting driving parameters corresponding to the four display brightness values are the same. The brightness of the display brightness value 1 at the maximum gray scale is 500nit, the brightness of the display brightness value 2 at the maximum gray scale is 420nit, the brightness of the display brightness value 3 at the maximum gray scale is 100nit, and the brightness of the display brightness value 4 at the maximum gray scale is 200 nit.
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 binding gray scale, and generates a curve diagram of the corresponding relation between the light-emitting brightness and the gamma voltage as 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 binding gray scale. In fig. 2, curves reg _ R500, reg _ G500, and reg _ B500 respectively show the correspondence between the emission luminances of the red, green, and blue light-emitting elements and the gamma voltage at the display luminance value 1 obtained by actual debugging, curves reg _ R420, reg _ G420, and reg _ B420 respectively show the correspondence between the emission luminances of the red, green, and blue light-emitting elements and the gamma voltage at the display luminance value 2 obtained by actual debugging, and curves reg _ R100, reg _ G100, and reg _ B100 respectively show the correspondence between the emission luminances of the red, green, and blue light-emitting elements and the gamma voltage at the display luminance value 3 obtained by actual debugging.
A first nonlinear model is constructed according to the gamma voltages of the display brightness value 1, the display brightness value 2 and the display brightness value 3 at the tie point gray scale, then the gamma voltages of the display brightness value 4 at the tie point gray scale are calculated according to the model, and another curve diagram of the corresponding relation between the light-emitting brightness and the gamma voltages as shown in FIG. 3 is generated. In fig. 3, curves R-c, G-c, and B-c respectively show the calculated correspondence between the emission luminances of the red light-emitting element, the green light-emitting element, and the blue light-emitting element at the display luminance value of 4 and the gamma voltage, and curves R-o, G-o, and B-o respectively show the correspondence between the emission luminances of the red light-emitting element, the green light-emitting element, and the blue light-emitting element at the display luminance value of 4 and the gamma voltage, which are actually obtained by 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 embodiment, the brightness of the first display brightness value at the maximum gray scale is greater than the brightness of the second display brightness value at the maximum gray scale.
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. Illustratively, the first brightness group includes three display brightness values, the brightness values corresponding to the three display brightness values at the maximum gray scale are respectively 500nit, 200nit and 100nit, the display brightness value corresponding to the 500nit brightness value is defined as a first display brightness value, the display brightness values corresponding to the 200nit and 100nit brightness values are defined as two second display brightness values, then a first nonlinear model is constructed according to the gamma voltages of the display brightness values corresponding to the 500nit brightness value at each tie point gray scale, and then the gamma voltages of the display brightness values corresponding to the 200nit and 100nit brightness value at each tie point gray scale are calculated, and at this time, the average debugging time of each display panel can be saved by 25-35 s.
Because the first non-linear model constructed by the gamma voltage with the high brightness level is more fit to the actual light emitting characteristic of the display panel, the gamma voltage with the low brightness level is calculated by utilizing the gamma voltage with the high brightness level, and the accuracy of the obtained gamma voltage can be further improved.
In a possible implementation manner, as shown in fig. 4, fig. 4 is another 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 S5: calculating the gamma voltage of the first display brightness value under the non-binding point gray scale according to the first non-linear model and the non-binding point brightness of the first display brightness value under the non-binding point gray scale; and calculating the gamma voltage of the second display brightness value under the non-binding gray scale according to the first non-linear model and the non-binding brightness of the second display brightness value under the non-binding gray scale.
In the prior art, the gamma voltage of each display brightness value under the non-binding gray scale is calculated according to the gamma voltage under the binding gray scale through a linear difference algorithm, and when the gamma voltage of the display brightness value under the binding gray scale has gamma offset, the gamma voltage under the non-binding gray scale is linearly superposed, so that the gamma offset is more serious. In the embodiment of the present invention, after the first nonlinear model is constructed, the gamma voltages of the first display luminance value and the second display luminance value under the non-binding gray scale can be further calculated through the first nonlinear model, and since the first nonlinear model is attached to the actual light emitting characteristic of the display panel, the calculated gamma voltages of the display luminance values under the non-binding gray scale are more attached to the actually debugged gamma voltages.
In one possible implementation, 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 another gamma debugging method for a display panel according to an embodiment of the present invention, where the gamma debugging method further includes:
step S6: and debugging and acquiring the gamma voltage of the third display brightness value under the binding point gray scale.
In the above manner, when the lighting condition of one or some display brightness values is different from the lighting condition of any other display brightness value, the gamma voltage of the part of display brightness values under the binding gray scale can be directly debugged and acquired, so as to improve the debugging accuracy of the gamma voltage of the part of display brightness values.
Further, as shown in fig. 6, fig. 6 is a flowchart of another gamma debugging method for 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 gray scale.
Step S8: and calculating the gamma voltage of the third display brightness value under the non-binding gray scale according to the second non-linear model and the non-binding brightness of the third display brightness value under the non-binding gray scale.
After the gamma voltage of the third display brightness value under the binding point gray scale is debugged and obtained, compared with the gamma voltage of the third display brightness value under the non-binding point gray scale which is directly obtained through calculation of a linear difference algorithm, the embodiment of the invention constructs the second nonlinear model by utilizing the gamma voltage under the binding point gray scale, and calculates the gamma voltage of the third display brightness value under the non-binding point gray scale by utilizing the second nonlinear model, so that the gamma voltage of the third display brightness value under the non-binding point gray scale can be more attached to the actually debugged gamma voltage.
Based on the same inventive concept, an embodiment of the present invention further provides a gamma debugging apparatus for a display device, as shown in fig. 7, fig. 7 is a schematic structural diagram of the gamma debugging apparatus for a display panel provided in the embodiment of the present invention, where the gamma debugging apparatus 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 brightness group according to a light-emitting driving parameter corresponding to each of a plurality of display brightness values in the display panel, where the first brightness group includes 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 2 is electrically connected with the setting module 1 and is used for debugging and acquiring the gamma voltage of the first display brightness value under the binding point gray scale.
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 the gamma voltage and the binding luminance of the first display luminance value under the binding gray scale.
The voltage calculation module 4 is electrically connected to the setting module 1 and the first model construction module 3, and is configured to calculate a gamma voltage of the second display brightness value at each binding gray scale according to the binding brightness of the first nonlinear model and the second display brightness value at each binding gray scale.
In the embodiment of the invention, by analyzing the light-emitting characteristic of the panel and establishing the panel light-emitting model (the first nonlinear model) of the display panel based on the gamma voltage of a certain display brightness value under the binding point gray scale, the gamma voltages of other display brightness values under the same light-emitting condition under the binding point gray scale can be directly calculated. 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 one possible implementation, 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 of a display panel according to an embodiment of the present invention, 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 at a binding gray scale.
When the lighting condition of one or some display brightness values is different from the lighting condition of any other display brightness value, the second voltage debugging module 5 may directly debug and obtain the gamma voltage of the portion of display brightness values at the binding gray scale, so as to improve the debugging accuracy of the gamma voltage of the portion of display brightness values.
Further, referring to fig. 8 again, the gamma debugging apparatus 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 the gamma voltage and the binding luminance of the third display luminance value at the binding gray scale.
The voltage calculating module 4 is further electrically connected to the second model constructing module 6, and is further configured to calculate a gamma voltage of the third display luminance value at the non-binding point gray scale according to the second non-linear model and the non-binding point luminance of the third display luminance value at the non-binding point gray scale.
After the gamma voltage of the third display brightness value under the binding point gray scale is debugged and obtained, compared with the gamma voltage of the third display brightness value under the non-binding point gray scale obtained by calculation directly through a linear difference algorithm, in the embodiment of the invention, the second model building module 6 builds the second nonlinear model by utilizing the gamma voltage under the binding point gray scale, and the voltage calculating module 4 further calculates the gamma voltage of the third display brightness value under the non-binding point gray scale by utilizing the second nonlinear model, so that the gamma voltage of the third display brightness value under the non-binding point gray scale can be more attached to the actually debugged gamma voltage.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A gamma debugging method of a display panel is characterized by comprising the following steps:
setting at least one first brightness group according to light-emitting driving parameters corresponding to a plurality of display brightness values in a 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 acquiring the gamma voltage of the first display brightness value under the binding point gray scale;
constructing a first nonlinear model according to the gamma voltage and the binding point 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 binding gray scale according to the first nonlinear model and the binding brightness of the second display brightness value under the binding gray scale.
2. The gamma debugging method of claim 1, wherein the emission driving parameters comprise:
a power supply voltage V received by the pixel circuit in the display panelPVDDAnd/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 adjustable range of the gray-scale voltage in the display panelGMPAnd/or the minimum value V of the adjustable range of the gray scale voltage in the display panelGsPAnd/or a refresh rate f of the display panel.
3. The gamma debugging method of claim 1,
the first nonlinear model is V ═ aLb+ c, wherein V is the gamma voltage, L is the binding brightness, and a, b, and c are constants, respectively.
4. The gamma debugging method of claim 1,
the brightness of the first display brightness value corresponding to the maximum gray scale is greater than the brightness of the second display brightness value corresponding to the maximum gray scale.
5. The gamma debugging method of claim 1, further comprising:
calculating a gamma voltage of the first display brightness value under a non-binding point gray scale according to the first nonlinear model and the non-binding point brightness of the first display brightness value under the non-binding point gray scale;
and calculating the gamma voltage of the second display brightness value under the non-binding gray scale according to the first non-linear model and the non-binding brightness of the second display brightness value under the non-binding gray scale.
6. The gamma debugging method of claim 1,
the plurality of display brightness values further include a third display brightness value, and the light-emission driving parameter corresponding to the third display brightness value is different from the light-emission driving parameter corresponding to the first display brightness value;
the gamma debugging method further comprises the following steps: and debugging and acquiring the gamma voltage of the third display brightness value under the binding point gray scale.
7. The gamma debugging method of claim 6, further comprising:
constructing a second nonlinear model according to the gamma voltage and the binding point brightness of the third display brightness value under the binding point gray scale;
and calculating the gamma voltage of the third display brightness value under the non-binding point gray scale according to the second nonlinear model and the non-binding point brightness of the third display brightness value under the non-binding point gray scale.
8. A gamma debugging apparatus of a display apparatus, comprising:
the display device comprises a setting module, a display module and a control module, wherein the setting module is used for setting at least one first brightness group according to light-emitting driving parameters corresponding to a plurality of display brightness values in a display panel, 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 used for debugging and acquiring the gamma voltage of the first display brightness value under the binding point gray scale;
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 the gamma voltage and the binding luminance of the first display luminance value under the binding gray scale;
and the voltage calculation module is respectively electrically connected with the setting module and the first model construction module and is used for calculating the gamma voltage of the second display brightness value under the binding gray scale according to the binding brightness of the first nonlinear model and the second display brightness value under each binding gray scale.
9. The gamma debugging device of claim 8, wherein,
the plurality of display brightness values further include a third display brightness value, and the light-emission driving parameter corresponding to the third display brightness value is different from the light-emission driving parameter 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 used for debugging and acquiring the gamma voltage of the third display brightness value under the binding point gray scale.
10. The gamma debugging device of claim 9, 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 the gamma voltage and the binding point 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 the gamma voltage of the third display brightness value under the non-binding point gray scale according to the second non-linear model and the non-binding point brightness of the third display brightness value under the non-binding point gray scale.
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