CN113393794B - Gamma debugging method, device and equipment - Google Patents

Gamma debugging method, device and equipment Download PDF

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Publication number
CN113393794B
CN113393794B CN202110660549.3A CN202110660549A CN113393794B CN 113393794 B CN113393794 B CN 113393794B CN 202110660549 A CN202110660549 A CN 202110660549A CN 113393794 B CN113393794 B CN 113393794B
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display panel
target
voltage value
brightness level
value
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CN113393794A (en
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王铁钢
姜海斌
上官修宁
韩光光
卢晶晶
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Kunshan Govisionox Optoelectronics Co Ltd
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Kunshan Govisionox Optoelectronics 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
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • 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
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
    • 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
    • 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
    • G09G2320/0693—Calibration of display systems

Abstract

The application discloses a gamma debugging method, a gamma debugging device and gamma debugging equipment. The method comprises the following steps: acquiring a first target voltage value corresponding to a target gray scale value of a display panel to be debugged at a first brightness level, wherein actual display parameters of the display panel to be debugged at the first target voltage value meet the display parameter requirements corresponding to the target gray scale value of the display panel to be debugged at the first brightness level; calculating a first reference voltage value corresponding to a target gray scale value of the display panel to be debugged at a second brightness level by using a preset algorithm; and taking the sum of the first reference voltage value and the voltage difference value as a second target voltage value corresponding to the target gray scale value of the display panel to be debugged at the second brightness level. According to the embodiment of the application, the gamma debugging time can be reduced, and the production efficiency is improved.

Description

Gamma debugging method, device and equipment
Technical Field
The application relates to the technical field of display, in particular to a gamma debugging method, a gamma debugging device and gamma debugging equipment.
Background
The display panel usually supports a plurality of brightness levels, and in order to ensure the display effect of the display panel at each brightness level, gamma debugging needs to be performed on the display panel at each brightness level, which results in a long time for gamma debugging and affects the production efficiency.
Disclosure of Invention
The embodiment of the application provides a gamma debugging method, a gamma debugging device and gamma debugging equipment, which can reduce the gamma debugging time and improve the production efficiency.
In a first aspect, an embodiment of the present application provides a gamma debugging method, which includes: acquiring a first target voltage value corresponding to a target gray scale value of a display panel to be debugged at a first brightness level, wherein actual display parameters of the display panel to be debugged at the first target voltage value meet the display parameter requirements corresponding to the target gray scale value of the display panel to be debugged at the first brightness level; calculating a first reference voltage value corresponding to a target gray scale value of the display panel to be debugged at a second brightness level by using a preset algorithm; and taking the sum of the first reference voltage value and the voltage difference value as a second target voltage value corresponding to a target gray scale value of the display panel to be debugged at a second brightness level, wherein the voltage difference value is the difference value between a third target voltage value and the second reference voltage value, an actual display parameter of the sample display panel at the third target voltage value meets a display parameter requirement corresponding to the target gray scale value of the sample display panel at the second brightness level, and the second reference voltage value is a voltage value corresponding to the target gray scale value of the sample display panel at the second brightness level, which is obtained by using a preset algorithm.
In a possible implementation manner of the first aspect, the gamma debugging method further includes:
acquiring a fourth target voltage value corresponding to the target gray scale value of the sample display panel at the first brightness level, wherein the actual display parameters of the sample display panel at the target gray scale value at the first brightness level meet the display parameter requirements corresponding to the target gray scale value of the sample display panel at the first brightness level;
and determining a second reference voltage value corresponding to the target gray-scale value of the sample display panel at a second brightness level by using a preset algorithm.
In a possible embodiment of the first aspect, the sample display panel and the display panel to be debugged belong to the same batch.
In a possible implementation manner of the first aspect, the position of the sample display panel on its corresponding display panel master is the same as the position of the display panel to be debugged on its corresponding display panel master.
In a possible implementation manner of the first aspect, the sample display panel is a first gamma-debugged display panel in the same batch.
In one possible implementation of the first aspect, the low-level power supply voltage ELVSS value corresponding to the first luminance level is different from the level power supply voltage ELVSS value corresponding to the second luminance level.
In a possible implementation manner of the first aspect, the target luminance value corresponding to the first luminance level is greater than the target luminance value corresponding to the second luminance level at the same gray scale value.
In a possible implementation manner of the first aspect, the first brightness level is a maximum brightness level of a plurality of brightness levels of the display panel to be debugged, where a target brightness value corresponding to the maximum brightness level is maximum at the same gray scale value.
In a second aspect, an embodiment of the present application provides a gamma debugging apparatus, including:
the first target voltage value acquisition module is used for acquiring a first target voltage value corresponding to a target gray scale value of the display panel to be debugged at a first brightness level, and actual display parameters of the display panel to be debugged at the first target voltage value meet the display parameter requirements corresponding to the target gray scale value of the display panel to be debugged at the first brightness level;
the first reference voltage value determining module is used for calculating a first reference voltage value corresponding to a target gray scale value of the display panel to be debugged under the second brightness level by using a preset algorithm;
and the second target voltage value determining module is used for taking the sum of the first reference voltage value and the voltage difference value as a second target voltage value corresponding to a target gray scale value of the display panel to be debugged at a second brightness level, wherein the voltage difference value is a difference value between the third target voltage value and the second reference voltage value, an actual display parameter of the sample display panel at the third target voltage value meets a display parameter requirement corresponding to the target gray scale value of the sample display panel at the second brightness level, and the second reference voltage value is a voltage value corresponding to the target gray scale value of the sample display panel at the second brightness level, which is obtained by using a preset algorithm.
In a third aspect, an embodiment of the present application provides a gamma debugging device, including a processor, a memory, and a computer program stored on the memory and executable on the processor, where the computer program, when executed by the processor, implements the gamma debugging method according to any one of the embodiments of the first aspect.
According to the gamma debugging method, the device and the equipment provided by the embodiment of the application, the actual gamma debugging of the display panel to be debugged is not needed to be carried out on the target gray-scale value under the second brightness level, the preset algorithm is directly utilized to calculate the first reference voltage value corresponding to the target gray-scale value under the second brightness level of the display panel to be debugged, and the sum of the first reference voltage value and the preset voltage difference value is further used as the second target voltage value corresponding to the target gray-scale value under the second brightness level of the display panel to be debugged. Since the preset voltage difference is a difference between a third target voltage value of the sample display panel and a second reference voltage value, it can be understood that the third target voltage value is a voltage value obtained by performing gamma debugging on a target gray-scale value of the sample display panel at a second brightness level, and the second reference voltage value is a voltage value corresponding to the target gray-scale value of the sample display panel at the second brightness level obtained by using a preset algorithm, so that a sum of the first reference voltage value and the preset voltage difference is closer to an actual voltage value corresponding to the target gray-scale value of the display panel to be debugged at the second brightness level. According to the embodiment of the application, the display panel to be debugged can be prevented from being subjected to gamma debugging under each brightness level, and the times of performing gamma debugging on the display panel to be debugged are reduced, so that the gamma debugging time is shortened, and the production efficiency is improved; in addition, the sum of the first reference voltage value and the preset voltage difference value is closer to the actual voltage value corresponding to the target gray scale value of the display panel to be debugged under the second brightness level, so that the display effect of the display panel to be debugged can be prevented from being influenced.
Drawings
Other features, objects, and advantages of the present application will become apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof, and which are not to scale.
FIG. 1 is a flow chart illustrating a gamma debugging method according to an embodiment of the present disclosure;
FIG. 2 is a flow chart illustrating a gamma debugging method according to another embodiment of the present disclosure;
FIG. 3 illustrates a gamma curve provided by an embodiment of the present application;
FIG. 4 is a schematic diagram of a display panel master provided by an embodiment of the present application;
FIG. 5 is a schematic structural diagram of a gamma debugging apparatus according to an embodiment of the present disclosure;
fig. 6 shows a schematic structural diagram of a gamma debugging apparatus according to an embodiment of the present application.
Detailed Description
Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The display panel is provided with a brightness adjusting control part, usually a brightness adjusting bar, and the same picture can be presented by different brightness by sliding the brightness adjusting bar. Different brightness levels may correspond to different positions of the brightness adjustment bar. In order to optimize power consumption of the display panel, different luminance levels may correspond to different values of the low level power supply voltage (ELVSS), wherein a low level power supply voltage (ELVSS) terminal of the display panel may be electrically connected to cathodes of the subpixels of the display panel. The applicant finds that, in the case that different low-level power supply voltage (ELVSS) values correspond to different brightness levels, since the different low-level power supply voltage (ELVSS) values corresponding to the first brightness level and the second brightness level affect the light emission brightness of the sub-pixels, if a preset algorithm is directly used to calculate a reference voltage value of the display panel at the second brightness level based on a voltage value obtained by gamma debugging of the display panel at the first brightness level, and the reference voltage value calculated by the preset algorithm is used as a target voltage value of the display panel at the second brightness level, the calculated target voltage value may be different from a target voltage value actually corresponding to the display panel at the second brightness level, so that the brightness and/or color coordinates of the display panel may not meet the requirements. It will be appreciated that the brightness and/or color coordinates of the display panel at the actual corresponding target voltage values are satisfactory.
In order to ensure the display effect of the display panel, under the condition that different brightness levels correspond to different low-level power supply voltage (ELVSS) values, the target voltage value of the display panel is not calculated by using a preset algorithm any more, but the target voltage value corresponding to the display panel at each brightness level is obtained by performing gamma debugging at each brightness level, so that the gamma debugging time is longer, and the production efficiency is influenced.
In view of the above technical problems, embodiments of the present application provide a gamma debugging method, a gamma debugging apparatus, and a gamma debugging device, and embodiments of the gamma debugging method, the gamma debugging apparatus, and the gamma debugging device will be described below with reference to the accompanying drawings.
Fig. 1 is a flowchart illustrating a gamma debugging method according to an embodiment of the present application. As shown in fig. 1, the gamma debugging method provided in the embodiment of the present application includes steps 110 to 130.
Step 110, a first target voltage value corresponding to a target gray scale value of the display panel to be debugged at the first brightness level is obtained, and actual display parameters of the display panel to be debugged at the first target voltage value meet the display parameter requirements corresponding to the target gray scale value of the display panel to be debugged at the first brightness level.
And 120, calculating a first reference voltage value corresponding to a target gray scale value of the display panel to be debugged at the second brightness level by using a preset algorithm.
Step 130, taking the sum of the first reference voltage value and the voltage difference value as a second target voltage value corresponding to a target gray scale value of the display panel to be debugged at a second brightness level, where the voltage difference value is a difference value between a third target voltage value and the second reference voltage value, an actual display parameter of the sample display panel at the third target voltage value meets a display parameter requirement corresponding to the target gray scale value of the sample display panel at the second brightness level, and the second reference voltage value is a voltage value corresponding to the target gray scale value of the sample display panel at the second brightness level, which is obtained by using a preset algorithm.
According to the gamma debugging method provided by the embodiment of the application, the actual gamma debugging of the display panel to be debugged is not needed to be carried out on the target gray-scale value under the second brightness level, the preset algorithm is directly utilized to calculate the first reference voltage value corresponding to the target gray-scale value under the second brightness level of the display panel to be debugged, and the sum of the first reference voltage value and the preset voltage difference value is further used as the second target voltage value corresponding to the target gray-scale value under the second brightness level of the display panel to be debugged. Since the preset voltage difference is a difference between a third target voltage value of the sample display panel and a second reference voltage value, it can be understood that the third target voltage value is a voltage value obtained by performing gamma debugging on a target gray-scale value of the sample display panel at a second brightness level, and the second reference voltage value is a voltage value corresponding to the target gray-scale value of the sample display panel at the second brightness level obtained by using a preset algorithm, so that a sum of the first reference voltage value and the preset voltage difference is closer to an actual voltage value corresponding to the target gray-scale value of the display panel to be debugged at the second brightness level. According to the embodiment of the application, the display panel to be debugged can be prevented from being subjected to gamma debugging under each brightness level, and the times of performing gamma debugging on the display panel to be debugged are reduced, so that the gamma debugging time is shortened, and the production efficiency is improved; in addition, the sum of the first reference voltage value and the preset voltage difference value is closer to the actual voltage value corresponding to the target gray scale value of the display panel to be debugged under the second brightness level, so that the display effect of the display panel to be debugged can be prevented from being influenced.
Illustratively, the display panel to be debugged and the sample display panel are both 8-bit display panels, that is, the display panel to be debugged and the sample display panel both have 256 levels of gray scales of 0-255. The target gray scale value may be any one of 0 to 255.
When gamma debugging is performed, in order to reduce the gamma debugging time, some gray scale binding points are usually set, the display panel can be debugged only under the gray scale binding points, and the corresponding relation between the debugged gray scale binding points and the voltage values is stored in the storage module. In addition, a linear interpolation algorithm can be used to calculate voltage values corresponding to gray scales other than the gray scale tie points. For example, eight gray levels can be selected from the 0-255 gray levels as gray level bindings, the target gray level value can be any one of the selected eight gray level bindings, and the target gray level value can be a gray level value other than the gray level bindings.
In this context, the voltage values such as the target voltage value, the reference voltage value, etc. may be understood as data voltage values required to be provided by the driving chip of the display panel, and the data voltage values are transmitted to the sub-pixels of the display panel through the data lines of the display panel, so that the sub-pixels generate the driving current and emit light. The voltage difference value can be understood as the difference between the data voltage values.
Under the same gray scale, the target brightness values corresponding to different brightness levels are different. For example, in the 255 gray scale, the target brightness corresponding to the first brightness level is 600nit, and the target brightness corresponding to the second brightness level is 450 nit. It is understood that the voltage values required for different brightness levels are different for the same gray level.
In the present application, the low level power supply voltage (ELVSS) value differs for different luminance levels. The low level power supply voltage (ELVSS) value is typically negative. At low brightness levels, the less brightness is required. Illustratively, the smaller the brightness level, the smaller the absolute value of the corresponding low-level power supply voltage (ELVSS) value may be to reduce power consumption of the display panel.
In some optional embodiments, before step 110, the gamma debugging method provided in the embodiments of the present application may further include: and determining a first target voltage value corresponding to the target gray scale value of the display panel to be debugged at the first brightness level according to the display parameter requirement corresponding to the target gray scale value of the display panel to be debugged at the first brightness level.
For example, the step of determining the first target voltage value may specifically include: setting an initial voltage value corresponding to a target gray scale value of a display panel to be debugged at a first brightness level, acquiring actual display parameters of the display panel to be debugged at the initial voltage value and display parameter requirements corresponding to the target gray scale value of the display panel to be debugged at the first brightness level, judging whether the actual display parameters meet the display parameter requirements, if not, adjusting the initial voltage value until the actual display parameters of the display panel to be debugged at the adjusted initial voltage value meet the display parameter requirements, and taking the adjusted initial voltage value as a first target voltage value corresponding to the target gray scale value of the display panel to be debugged at the first brightness level.
It can be understood that, if the actual display parameters of the display panel to be debugged under the initial voltage value meet the display parameter requirements, the initial voltage value does not need to be adjusted, and the initial voltage value can be directly used as the first target voltage value corresponding to the target gray-scale value of the display panel to be debugged under the first brightness level.
Illustratively, if the difference between the actual display parameter and the display parameter requirement is within a preset range, the actual display parameter is considered to meet the display parameter requirement; and if the difference value between the actual display parameter and the display parameter requirement is out of the preset range, the actual display parameter is considered to be not in accordance with the display parameter requirement. The preset range may be a relatively small range, for example, the preset range is zero, or the difference between the actual display parameter and the display parameter requirement cannot be recognized by human eyes within the preset range.
Illustratively, the actual display parameter, the display parameter requirement may be at least one of a luminance value and a color coordinate.
Illustratively, the optical device may be used to acquire actual display parameters of the display panel to be debugged.
In some alternative embodiments, the predetermined algorithm may be an interpolation algorithm, or may be an algorithm other than an interpolation algorithm. Taking a preset algorithm as an interpolation algorithm, for example, a target brightness value corresponding to a first gray scale value of the display panel to be debugged at a first brightness level is the same as a target brightness value corresponding to a target gray scale value of the display panel to be debugged at a second brightness level, and a voltage value corresponding to the first gray scale value of the display panel to be debugged at the first brightness level may be used as a first reference voltage value corresponding to the target gray scale value of the display panel to be debugged at the second brightness level.
In some optional embodiments, step 120 may specifically include: acquiring a target brightness value corresponding to a target gray scale value of the display panel to be debugged at a second brightness level, and acquiring a first gray scale value corresponding to the target brightness value of the display panel to be debugged at a first brightness level; and taking the voltage value corresponding to the first gray scale value of the display panel to be debugged at the first brightness level as the first reference voltage value corresponding to the target gray scale value of the display panel to be debugged at the second brightness level.
To better understand how the first reference voltage value corresponding to the target gray-scale value of the display panel to be debugged at the second brightness level is calculated according to the preset algorithm, please refer to table 1.
In table 1, T1 denotes a first brightness level, G1 denotes a first gray-scale value, L denotes a target brightness value, T2 denotes a second brightness level, G2 denotes a target gray-scale value, and Vdata denotes a voltage value corresponding to the first gray-scale value of the display panel to be debugged at the first brightness level, it can be understood that the first reference voltage value corresponding to the target gray-scale value G2 of the display panel to be debugged at the second brightness level T2 may be Vdata.
TABLE 1
T1 G1 Vdata L
T2 G2 Vdata L
For example, the target gray-scale value G2 is 255 grayscales, the target brightness value 300nit corresponding to the target gray-scale value G2 of the display panel to be debugged under the second brightness level may be determined first, the gray-scale value corresponding to the target brightness value of the display panel to be debugged under the first brightness level is 300nit, the gray-scale value corresponding to the target brightness value of the display panel to be debugged under the first brightness level is 200 grayscales, the 200 grayscales are the first gray-scale value G1, and the voltage value Vdata corresponding to the 200 grayscales of the display panel to be debugged under the first brightness level may be the first reference voltage value corresponding to the target gray-scale value of the display panel to be debugged under the second brightness level.
For example, when the first gray-scale value is a gray-scale binding point, the voltage value corresponding to the 200 gray-scales of the display panel to be debugged at the first brightness level may be determined according to the step of determining the first target voltage value, which is not described in detail herein.
For example, in the case that the first gray-scale value is a gray-scale value other than the gray-scale binding point, the voltage value corresponding to the first gray-scale value of the display panel to be debugged at the first brightness level may be calculated by using a linear difference algorithm according to the voltage values corresponding to the two gray-scale binding points adjacent to the first gray-scale value.
For example, the voltage value Vdata corresponding to the first gray scale value of the display panel to be debugged at the first brightness level may be equal to
Figure BDA0003115054290000091
Wherein, Vn+1The voltage value V corresponding to the gray scale binding point n +1 of the display panel to be debugged under the first brightness levelnThe voltage value corresponding to the gray scale binding point n of the display panel to be debugged under the first brightness level is represented, the delta G represents the difference value between the gray scale value corresponding to the gray scale binding point n +1 and the gray scale value corresponding to the gray scale binding point n, the G represents the first gray scale value, the numerical value of the G is between the gray scale value corresponding to the gray scale binding point n +1 and the gray scale value corresponding to the gray scale binding point n, and the n represents the gray scale value corresponding to the nth gray scale binding point.
For example, as shown in fig. 2, still taking a sample display panel having 256 levels of gray scales of 0 to 255, eight gray scales may be selected from the 0 to 255 gray scales as gray scale binding points, in fig. 2, the abscissa represents a gray scale value, the ordinate represents a luminance value, and the target gray scale value may be any one of the eight gray scale binding points. Curve 1 represents the gamma curve of the sample display panel at the first brightness level, curve 2 represents the gamma curve of the sample display panel at the second brightness level, and curve 3 represents the gamma curve of the sample display panel at the second brightness level, which is calculated by using the preset algorithm, for example, the low level power voltage (ELVSS) value corresponding to the first brightness level is-3V, and the low level power voltage (ELVSS) value corresponding to the second brightness level is-2.5V, it can be seen that there is a difference between curve 3 and curve 2, and therefore, there is a difference between the voltage value calculated by using the preset algorithm and the voltage value actually debugged.
In some optional embodiments, as shown in fig. 3, before step 110, the gamma debugging method provided in the embodiment of the present application may further include steps 140 to 150.
Step 140, a fourth target voltage value corresponding to the target gray scale value of the sample display panel at the first brightness level is obtained, and the actual display parameters of the sample display panel at the target gray scale value at the first brightness level meet the display parameter requirements corresponding to the target gray scale value of the sample display panel at the first brightness level.
Step 150, determining a second reference voltage value corresponding to the target gray scale value of the sample display panel at the second brightness level by using a preset algorithm.
For example, before step 140, the gamma debugging method provided in the embodiment of the present application may further include: and determining a fourth target voltage value corresponding to the target gray scale value of the sample display panel at the first brightness level according to the display parameter requirement corresponding to the target gray scale value of the sample display panel at the first brightness level.
The difference between the gamma debugging process of the sample display panel and the gamma debugging process of the display panel to be debugged is that the target gray-scale value at the second brightness level still needs to perform actual gamma debugging on the sample display panel so as to determine a second target voltage value corresponding to the target gray-scale value at the second brightness level of the sample display panel.
According to the embodiment of the application, the second reference voltage value corresponding to the target gray scale value of the sample display panel at the second brightness level is calculated by using the preset algorithm, and the target gray scale value at the second brightness level still needs to be subjected to actual gamma debugging on the sample display panel so as to determine the second target voltage value corresponding to the target gray scale value of the sample display panel at the second brightness level, so that the voltage difference value can be accurately determined based on the second reference voltage value and the second target voltage value.
It can be understood that the preset algorithm used in the gamma debugging process of the sample display panel and the gamma debugging process of the display panel to be debugged is the same algorithm.
For example, the gamma debugging method provided in the embodiment of the present application may further include: and determining a third target voltage value corresponding to the target gray scale value of the sample display panel at the second brightness level according to the display parameter requirement corresponding to the target gray scale value of the sample display panel at the second brightness level.
For example, the third target voltage value and the fourth target voltage value may be determined according to the above-mentioned manner of determining the first target voltage value, and details thereof are not repeated herein.
Illustratively, step 150 may specifically include: acquiring a target brightness value corresponding to a target gray scale value of the sample display panel at a second brightness level, and acquiring a second gray scale value corresponding to the target brightness value of the sample display panel at a first brightness level; and taking the voltage value corresponding to the second gray-scale value of the sample display panel under the first brightness level as a second reference voltage value corresponding to the target gray-scale value of the sample display panel under the second brightness level.
For example, the determination method of the voltage value corresponding to the second gray scale value of the sample display panel at the first brightness level may refer to the determination method of the voltage value corresponding to the first gray scale value of the display panel to be debugged at the first brightness level, and details thereof are not repeated herein.
It can be understood that the specific values of the display parameter requirements corresponding to the target gray-scale values of the sample display panel or the display panel to be debugged at different brightness levels may be different.
In some alternative embodiments, the sample display panel and the display panel to be debugged belong to the same batch.
The display panels in the same batch have the same structure, material, and driving circuit (including pixel circuit, gate driving circuit, and integrated circuit of driving chip), so the display parameters of the display panels in the same batch are substantially the same. Under the condition that the sample display panel and the display panel to be debugged belong to the same batch, the voltage difference value obtained based on the sample display panel is more accurate to the display panel to be debugged, and therefore the accuracy of the second target voltage value obtained based on the voltage difference value is improved.
For example, a batch identifier may be disposed on the display panel, and before step 130, the gamma debugging method provided in this embodiment of the present application may further include: acquiring a batch identification code of a display panel to be debugged, and identifying the batch of the display panel to be debugged; and selecting sample display panels with the same batch as the display panels to be debugged, and acquiring a voltage difference value corresponding to the selected sample display panels.
In some optional embodiments, the position of the sample display panel on its corresponding display panel master is the same as the position of the display panel to be debugged on its corresponding display panel master.
In the process of manufacturing display panels, a plurality of display panel masters are generally manufactured in the same batch, and then each display panel master is cut to obtain a plurality of display panels. The display characteristics of the display panels at different positions on the display panel mother plate are different to a certain extent, the sample display panel and the display panel to be debugged belong to the same batch, and under the condition that the position of the sample display panel on the display panel mother plate corresponding to the sample display panel is the same as the position of the display panel to be debugged on the display panel mother plate corresponding to the sample display panel, the sample display panel and the display output substrate of the display panel to be debugged are completely the same, so that the voltage difference value obtained based on the sample display panel is more accurate to the display panel to be debugged, and the accuracy of the second target voltage value obtained based on the voltage difference value is further improved.
Illustratively, as shown in fig. 4, the display panel master may include 14 rows and 7 columns of display panels. Each display panel may be provided with an Identity Document (ID) code, and the Identity Document (ID) code may represent position information of the display panel on the display panel master. For example, ID1,1 indicates that the display panel is positioned on the display panel master in a first row and a first column.
For example, before step 130, the gamma debugging method provided in the embodiment of the present application may further include: acquiring an ID code of a display panel to be debugged, and identifying position information of the display panel to be debugged on a corresponding display panel mother board; and selecting a sample display panel with the same position as the display panel to be debugged, and acquiring a voltage difference value corresponding to the selected sample display panel.
For example, only one two-dimensional code may be set on the display panel, where the two-dimensional code includes batch information of the display panels and position information of the display panels on their corresponding display panel masters. Before gamma debugging is performed on the display panel to be debugged, the two-dimensional code on the display panel to be debugged can be scanned first to obtain batch information and position information of the display panel to be debugged.
In some alternative embodiments, the sample display panel is the first gamma-debugged display panel in the same batch.
The same batch includes multiple display panels, and gamma debugging is required for each display panel. When the sample display panel is the first gamma-debugged display panel in the same batch, and when the gamma debugging is performed on other display panels in the same batch, only the preset algorithm and the voltage difference value corresponding to the first gamma-debugged display panel are needed to directly calculate the second target voltage value corresponding to the target gray scale value of each display panel at the second brightness level, so that the gamma debugging time of other display panels can be reduced, and the gamma debugging time required by the display panels in the same batch is reduced on the whole.
In some optional embodiments, the target brightness value corresponding to the first brightness level is greater than the target brightness value corresponding to the second brightness level at the same gray scale value.
For example, a plurality of luminance levels may be set, and the target luminance values corresponding to the luminance levels are different at the same gray scale value. The plurality of brightness levels may include a highest brightness level and a lowest brightness level, and other brightness levels between the highest brightness level and the lowest brightness level. For example, the number of the brightness levels may be 10, and of course, the number of the brightness levels and the target brightness value corresponding to each brightness level may be set according to actual requirements, which is not limited in the present application.
Due to the limitation of the brightness acquisition equipment, the acquisition accuracy under low brightness is not high under high brightness, so that the first target voltage value of the display panel to be debugged under the high brightness level is referred, and the first reference voltage value calculated by using the preset algorithm is more accurate.
In some optional embodiments, the first brightness level is a maximum brightness level of a plurality of brightness levels, wherein a target brightness value corresponding to the maximum brightness level of the plurality of brightness levels is maximum at the same gray scale value.
As described above, the acquisition accuracy of the luminance acquisition at low luminance is not high as the acquisition accuracy at high luminance, and the accuracy of the voltage value of the first reference calculated by the preset algorithm can be further improved by setting the first luminance level to the maximum luminance level.
It should be noted that the above embodiments may be combined with each other without contradiction.
The embodiment of the application also provides a gamma debugging device. As shown in fig. 5, the gamma debugging apparatus 500 provided in the embodiment of the present application includes a first target voltage value obtaining module 501, a first reference voltage value determining module 502, and a second target voltage value determining module 503.
The first target voltage value determining module 501 is configured to obtain a first target voltage value corresponding to a target gray scale value of the display panel to be debugged at a first brightness level, where an actual display parameter of the display panel to be debugged at the first target voltage value meets a display parameter requirement corresponding to the target gray scale value of the display panel to be debugged at the first brightness level;
a first reference voltage value determining module 502, configured to calculate, by using a preset algorithm, a first reference voltage value corresponding to a target gray scale value of the display panel to be debugged at a second brightness level;
the second target voltage value determining module 503 is configured to use a sum of the first reference voltage value and a voltage difference value as a second target voltage value corresponding to a target gray scale value of the display panel to be debugged at the second brightness level, where the voltage difference value is a difference between the third target voltage value and the second reference voltage value, an actual display parameter of the sample display panel at the third target voltage value meets a display parameter requirement corresponding to the target gray scale value of the sample display panel at the second brightness level, and the second reference voltage value is a voltage value corresponding to the target gray scale value of the sample display panel at the second brightness level, where the voltage value is obtained by using a preset algorithm.
According to the gamma debugging device provided by the embodiment of the application, the actual gamma debugging of the display panel to be debugged is not needed to be carried out according to the target gray-scale value at the second brightness level, the preset algorithm is directly utilized to calculate the first reference voltage value corresponding to the target gray-scale value at the second brightness level of the display panel to be debugged, and the sum of the first reference voltage value and the preset voltage difference value is further used as the second target voltage value corresponding to the target gray-scale value at the second brightness level of the display panel to be debugged. The preset voltage difference value is a difference value between a third target voltage value and a second reference voltage value of the sample display panel, the third target voltage value is a voltage value obtained by performing gamma debugging on a target gray-scale value of the sample display panel at a second brightness level, and the second reference voltage value is a voltage value corresponding to the target gray-scale value of the sample display panel at the second brightness level obtained by using a preset algorithm, so that the sum of the first reference voltage value and the preset voltage difference value is closer to an actual voltage value corresponding to the target gray-scale value of the display panel to be debugged at the second brightness level. According to the embodiment of the application, the display panel to be debugged can be prevented from being subjected to gamma debugging under each brightness level, and the times of performing gamma debugging on the display panel to be debugged are reduced, so that the gamma debugging time is shortened, and the production efficiency is improved; in addition, the sum of the first reference voltage value and the preset voltage difference value is closer to the actual voltage value corresponding to the target gray scale value of the display panel to be debugged under the second brightness level, so that the display effect of the display panel to be debugged can be prevented from being influenced.
In some optional embodiments, the gamma debugging apparatus 500 provided in this embodiment of the present application may further include:
the fourth target voltage value acquisition module is used for acquiring a fourth target voltage value corresponding to a target gray scale value of the sample display panel at the first brightness level, and actual display parameters of the sample display panel at the target gray scale value at the first brightness level meet the display parameter requirements corresponding to the target gray scale value of the sample display panel at the first brightness level;
and the second reference voltage value determining module is used for determining a second reference voltage value corresponding to the target gray-scale value of the sample display panel at a second brightness level by using a preset algorithm.
In some alternative embodiments, the sample display panel and the display panel to be debugged belong to the same batch.
In some optional embodiments, the position of the sample display panel on its corresponding display panel master is the same as the position of the display panel to be debugged on its corresponding display panel master.
In some alternative embodiments, the sample display panel is the first gamma-debugged display panel in the same batch.
In some alternative embodiments, the low-level power supply voltage ELVSS value corresponding to the first luminance level is different from the level power supply voltage ELVSS value corresponding to the second luminance level.
In some optional embodiments, the target brightness value corresponding to the first brightness level is greater than the target brightness value corresponding to the second brightness level at the same gray scale value.
In some optional embodiments, the first brightness level is a maximum brightness level of a plurality of brightness levels of the display panel to be debugged, wherein a target brightness value corresponding to the maximum brightness level is maximum at the same gray scale value.
The gamma debugging device in the embodiment of the present application may be a device, and may also be a component, an integrated circuit, or a chip in an electronic device. The device can be mobile electronic equipment or non-mobile electronic equipment. By way of example, the mobile electronic device may be a mobile phone, a tablet computer, a notebook computer, a palm top computer, a vehicle-mounted electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook or a Personal Digital Assistant (PDA), and the like, and the non-mobile electronic device may be a server, a Network Attached Storage (NAS), a Personal Computer (PC), a Television (TV), a teller machine or a self-service machine, and the like, and the embodiments of the present application are not particularly limited.
The gamma debugging device in the embodiment of the present application may be a device having an operating system. The operating system may be an Android (Android) operating system, an ios operating system, or other possible operating systems, and embodiments of the present application are not limited specifically.
The gamma debugging device provided in the embodiment of the present application can implement each process implemented in the method embodiment of fig. 1, and is not described here again to avoid repetition.
Fig. 6 shows a hardware structure diagram of a gamma debugging device provided in an embodiment of the present application.
The gamma debugging device may comprise a processor 901 and a memory 902 in which computer program instructions are stored.
Specifically, the processor 901 may include a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or may be configured as one or more Integrated circuits implementing the embodiments of the present invention.
Memory 902 may include mass storage for data or instructions. By way of example, and not limitation, memory 902 may include a Hard Disk Drive (HDD), floppy Disk Drive, flash memory, optical Disk, magneto-optical Disk, tape, or Universal Serial Bus (USB) Drive or a combination of two or more of these. Memory 902 may include removable or non-removable (or fixed) media, where appropriate. The memory 902 may be internal or external to the integrated gateway disaster recovery device, where appropriate. In a particular embodiment, the memory 902 is a non-volatile solid-state memory. In a particular embodiment, the memory 902 includes Read Only Memory (ROM). Where appropriate, the ROM may be mask-programmed ROM, Programmable ROM (PROM), Erasable PROM (EPROM), Electrically Erasable PROM (EEPROM), electrically rewritable ROM (EAROM), or flash memory or a combination of two or more of these.
The processor 901 reads and executes the computer program instructions stored in the memory 902 to implement any one of the gamma debugging methods in the above embodiments.
In one example, the gamma debugging device may also include a communication interface 903 and a bus 910. As shown in fig. 6, the processor 901, the memory 902, and the communication interface 903 are connected via a bus 910 to complete communication with each other.
The communication interface 903 is mainly used for implementing communication between modules, apparatuses, units and/or devices in the embodiments of the present invention.
Bus 910 includes hardware, software, or both to couple the components of the compensation voltage determination device to each other. By way of example, and not limitation, a bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hypertransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an infiniband interconnect, a Low Pin Count (LPC) bus, a memory bus, a Micro Channel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a video electronics standards association local (VLB) bus, or other suitable bus or a combination of two or more of these. Bus 910 can include one or more buses, where appropriate. Although specific buses have been described and shown in the embodiments of the invention, any suitable buses or interconnects are contemplated by the invention.
The gamma debugging device can execute the gamma debugging method in the embodiment of the application, thereby realizing the gamma debugging method and the gamma debugging device described in conjunction with fig. 1 and fig. 5.
An embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the gamma debugging method in the foregoing embodiment can be implemented, and the same technical effect can be achieved. The computer-readable storage medium may include a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and the like, which is not limited herein.
By way of example, computer-readable storage media may comprise non-transitory readable storage media.
In accordance with the embodiments of the present application as described above, these embodiments are not exhaustive and do not limit the application to the specific embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the application and its practical application, to thereby enable others skilled in the art to best utilize the application and its various modifications as are suited to the particular use contemplated. The application is limited only by the claims and their full scope and equivalents.

Claims (10)

1. A method of gamma debugging, the method comprising:
acquiring a first target voltage value corresponding to a target gray scale value of a display panel to be debugged at a first brightness level, wherein actual display parameters of the display panel to be debugged at the first target voltage value meet the display parameter requirements corresponding to the target gray scale value of the display panel to be debugged at the first brightness level;
calculating a first reference voltage value corresponding to the target gray scale value of the display panel to be debugged under a second brightness level by using a preset algorithm;
and taking the sum of the first reference voltage value and the voltage difference value as a second target voltage value corresponding to the target gray scale value of the display panel to be debugged at the second brightness level, wherein the voltage difference value is a difference value between a third target voltage value and a second reference voltage value, an actual display parameter of the sample display panel at the third target voltage value meets a display parameter requirement corresponding to the target gray scale value of the sample display panel at the second brightness level, the second reference voltage value is a voltage value corresponding to the target gray scale value of the sample display panel at the second brightness level obtained by using the preset algorithm, and the third target voltage value is a voltage value obtained by performing gamma debugging on the target gray scale value of the sample display panel at the second brightness level.
2. The gamma debugging method of claim 1, further comprising:
acquiring a fourth target voltage value corresponding to the target gray scale value of the sample display panel at the first brightness level, wherein actual display parameters of the sample display panel at the target gray scale value at the first brightness level meet the display parameter requirements corresponding to the target gray scale value of the sample display panel at the first brightness level;
and determining the second reference voltage value corresponding to the target gray-scale value of the sample display panel under the second brightness level by using the preset algorithm.
3. The gamma debugging method of claim 1,
the sample display panel and the display panel to be debugged belong to the same batch.
4. The gamma debugging method of claim 3,
and the position of the sample display panel on the corresponding display panel mother board is the same as the position of the display panel to be debugged on the corresponding display panel mother board.
5. The gamma debugging method of claim 4, wherein the sample display panel is the first gamma debugged display panel in the same batch.
6. The gamma debugging method of claim 1, wherein the level power supply voltage ELVSS value corresponding to the first brightness level is different from the level power supply voltage ELVSS value corresponding to the second brightness level.
7. The gamma debugging method of claim 1, wherein the target brightness value corresponding to the first brightness level is greater than the target brightness value corresponding to the second brightness level at the same gray scale value.
8. The gamma debugging method of claim 7, wherein the first brightness level is a maximum brightness level of a plurality of brightness levels of the display panel to be debugged, and wherein a target brightness value corresponding to the maximum brightness level is the maximum at a same gray scale value.
9. A gamma debugging apparatus, characterized in that the apparatus comprises:
the device comprises a first target voltage value determining module, a second target voltage value determining module and a display parameter adjusting module, wherein the first target voltage value determining module is used for acquiring a first target voltage value corresponding to a target gray scale value of a display panel to be debugged at a first brightness level, and actual display parameters of the display panel to be debugged at the first target voltage value meet the display parameter requirements corresponding to the target gray scale value of the display panel to be debugged at the first brightness level;
the first reference voltage value determining module is used for calculating a first reference voltage value corresponding to the target gray scale value of the display panel to be debugged under a second brightness level by using a preset algorithm;
a second target voltage value determination module for summing the first reference voltage value and the voltage difference value, as a second target voltage value corresponding to the target gray-scale value of the display panel to be debugged at the second brightness level, wherein the voltage difference is a difference between a third target voltage value and a second reference voltage value, an actual display parameter of the sample display panel at the third target voltage value meets a display parameter requirement corresponding to the target gray scale value of the sample display panel at the second brightness level, the second reference voltage value is a voltage value corresponding to the target gray scale value of the sample display panel at the second brightness level obtained by using the preset algorithm, the third target voltage value is obtained by performing gamma debugging on a target gray-scale value of the sample display panel at the second brightness level.
10. A gamma debugging device comprising a processor, a memory, and a computer program stored on the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the gamma debugging method of any one of claims 1 to 8.
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