CN115547268A - Method and device for determining common voltage of liquid crystal display panel and computer equipment - Google Patents
Method and device for determining common voltage of liquid crystal display panel and computer equipment Download PDFInfo
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- CN115547268A CN115547268A CN202110744778.3A CN202110744778A CN115547268A CN 115547268 A CN115547268 A CN 115547268A CN 202110744778 A CN202110744778 A CN 202110744778A CN 115547268 A CN115547268 A CN 115547268A
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- 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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
Abstract
The application relates to a method and a device for determining a common voltage of a liquid crystal display panel, a computer device and a storage medium. The method comprises the following steps: acquiring a common voltage range corresponding to the liquid crystal display panel to be detected, wherein the common voltage range is between a first minimum value and a first maximum value; obtaining a second maximum value and a second minimum value according to the first maximum value and the first minimum value, wherein the first maximum value is larger than the second maximum value, and the first minimum value is smaller than the second minimum value; respectively acquiring a first flicker value corresponding to a first maximum value, a second flicker value corresponding to a second maximum value, a third flicker value corresponding to a second minimum value and a fourth flicker value corresponding to a first minimum value on the basis of the liquid crystal display panel to be detected; and obtaining the corrected common voltage of the liquid crystal display panel to be detected according to the first maximum value, the second minimum value, the first flicker value, the second flicker value, the third flicker value and the fourth flicker value.
Description
Technical Field
The present disclosure relates to the field of testing technologies for liquid crystal display panels, and in particular, to a method and an apparatus for determining a common voltage of a liquid crystal display panel, a computer device, and a storage medium.
Background
With the development of the testing technology of the Liquid Crystal Display panel, the requirement on the Liquid Crystal Display panel is higher and higher, wherein the Liquid Crystal Display panel (Liquid Crystal Display, abbreviated as LCD) adjusts the deflection angle of Liquid Crystal molecules by applying different voltage signals to the pixel electrodes, so that the light transmittance of Liquid Crystal word separation is changed, and further, the picture Display of different gray scales is realized. When the brightness of the liquid crystal display panel changes from bright to dark, the liquid crystal display panel flickers, and the frequency of the flickers is in a range which can be sensed by human eyes. When the liquid crystal display panel flickers, the display effect of the liquid crystal display panel is affected, wherein the larger the Flicker value (Flicker) of the liquid crystal display panel is, the more flickers the liquid crystal display panel will Flicker when displaying, and the more fatigued human eyes are.
In the related art, in order to solve the problem of the flicker value of the liquid crystal display panel, a plurality of flicker value tests are performed on the liquid crystal display panel by using a traversal method or a bisection method, and the flicker value of the liquid crystal display panel is minimized by determining a correction common voltage of the liquid crystal display panel.
However, when the flicker value test is performed on the liquid crystal display panel by the traversal method or the binary method, the number of tests is large and the test time is long, which results in low production efficiency of the liquid crystal display panel.
Disclosure of Invention
In view of the above, it is necessary to provide a method and an apparatus for determining a common voltage of a liquid crystal display panel, a computer device, and a storage medium.
A method for determining a common voltage of a liquid crystal display panel includes:
acquiring a range of a common voltage corresponding to the liquid crystal display panel to be detected, wherein the range of the common voltage is between a first minimum value and a first maximum value; obtaining a second maximum value and a second minimum value according to the first maximum value and the first minimum value, wherein the first maximum value is larger than the second maximum value, and the first minimum value is smaller than the second minimum value; respectively setting the common voltage of the liquid crystal display panel to be tested to the first maximum value, the second minimum value and the first minimum value, and respectively obtaining a first flicker value corresponding to the first maximum value, a second flicker value corresponding to the second maximum value, a third flicker value corresponding to the second minimum value and a fourth flicker value corresponding to the first minimum value; and obtaining the corrected common voltage of the liquid crystal display panel to be tested according to the first maximum value, the second minimum value, the first flicker value, the second flicker value, the third flicker value and the fourth flicker value.
In one embodiment, obtaining a second maximum value and a second minimum value according to the first maximum value and the first minimum value includes:
subtracting the interval voltage from the first maximum value to obtain the second maximum value, and adding the interval voltage to the first minimum value to obtain the second minimum value.
In one embodiment, the interval voltage is obtained by:
respectively measuring flicker values of a plurality of liquid crystal display module samples to obtain the minimum flicker value corresponding to each liquid crystal display module sample, and taking the common voltage corresponding to each minimum flicker value as the actual measurement correction common voltage; subtracting the initial voltage increment from the first maximum value to obtain an initial first maximum value, and adding the initial voltage increment to the first minimum value to obtain an initial first minimum value; wherein the initial first maximum value and the initial first minimum value are within the range of the common voltage; measuring the corresponding flicker values of the common voltage of each liquid crystal display module sample under the conditions of the first maximum value, the initial first maximum value, the first minimum value and the initial first minimum value, and obtaining the predicted correction common voltage of each liquid crystal display module sample under the condition of the initial voltage increment; comparing the actual measurement correction common voltage corresponding to each liquid crystal display module sample with the prediction correction common voltage corresponding to each liquid crystal display module sample to obtain a difference value corresponding to each liquid crystal display module sample, and performing average calculation on the difference value corresponding to each liquid crystal display module sample to obtain an average deviation value of each liquid crystal display module under the initial voltage increment condition; increasing the value of the initial voltage increment, repeatedly obtaining the average deviation value of each liquid crystal display module under the condition of the initial voltage increment, and taking the minimum value of the average deviation values as the minimum average deviation value; and taking the initial voltage increment corresponding to the minimum average deviation value as the interval voltage.
In one embodiment, obtaining the corrected common voltage of the lcd panel under test according to the first maximum value, the second minimum value, the first flicker value, the second flicker value, the third flicker value, and the fourth flicker value includes:
and fitting according to the first maximum value, the second minimum value, the first flicker value, the second flicker value, the third flicker value and the fourth flicker value to obtain a linear relation function of the common voltage and the flicker value, and determining the corrected common voltage of the liquid crystal display panel to be tested according to the linear relation function.
In one embodiment, fitting the first maximum value, the second maximum value, the first minimum value, the first flicker value, the second minimum value, the second flicker value, the third flicker value, and the fourth flicker value to obtain a linear relationship function between the common voltage and the flicker value, and determining the corrected common voltage of the lcd panel to be tested according to the linear relationship function includes:
fitting according to the first maximum value, the second maximum value, the first flicker value and the second flicker value to obtain a first linear function of the common voltage and the flicker value; fitting according to the second minimum value, the first minimum value, the third flicker value and the fourth flicker value to obtain a second linear function of the common voltage and the flicker value; and determining the correction common voltage of the liquid crystal display panel to be tested according to the common voltage corresponding to the intersection point between the first linear function and the second linear function. In one embodiment, the corrected common voltage is composed of the common voltage added to a voltage compensation value.
In one embodiment, the voltage compensation value is obtained by the following steps:
respectively measuring flicker values of a plurality of liquid crystal display module samples to obtain a minimum flicker value corresponding to each liquid crystal display module sample, and taking a common voltage corresponding to each minimum flicker value as an actually measured correction common voltage; subtracting an initial voltage increment from the first maximum value to obtain an initial first maximum value, and adding an initial voltage increment to the first minimum value to obtain an initial first minimum value, wherein the initial first maximum value and the initial first minimum value are within the range of the common voltage; measuring the corresponding flicker values of the common voltage of each liquid crystal display module sample under the conditions of the first maximum value, the initial first maximum value, the first minimum value and the initial first minimum value, and obtaining the predicted correction common voltage of each liquid crystal display module sample under the condition of the initial voltage increment; comparing the actual measurement correction common voltage corresponding to each liquid crystal display module sample with the prediction correction common voltage corresponding to each liquid crystal display module sample to obtain a difference value corresponding to each liquid crystal display module sample, and performing average calculation on the difference value corresponding to each liquid crystal display module sample to obtain an average deviation value of each liquid crystal display module under the initial voltage increment condition; increasing the value of the initial voltage increment, repeatedly obtaining average deviation values of each liquid crystal display module under the condition of the initial voltage increment, and taking the minimum value of the average deviation values as the minimum average deviation value; and taking the minimum average deviation value as a voltage compensation value.
A common voltage determining apparatus of a liquid crystal display panel, the apparatus comprising:
the acquisition module is used for acquiring the range of the public voltage corresponding to the liquid crystal display panel to be detected, wherein the range of the public voltage is from a first minimum value to a first maximum value;
a first obtaining module, configured to obtain a second maximum value and a second minimum value according to the first maximum value and the first minimum value, where the first maximum value is greater than the second maximum value, and the first minimum value is smaller than the second minimum value;
the second obtaining module is used for respectively setting the common voltage of the liquid crystal display panel to be tested to the first maximum value, the second minimum value and the first minimum value, and respectively obtaining a first flicker value corresponding to the first maximum value, a second flicker value corresponding to the second maximum value, a third flicker value corresponding to the second minimum value and a fourth flicker value corresponding to the first minimum value;
and the third obtaining module is used for obtaining the corrected common voltage of the liquid crystal display panel to be detected according to the first maximum value, the second minimum value, the first flicker value, the second flicker value, the third flicker value and the fourth flicker value.
In one embodiment, a second maximum value and a second minimum value are obtained according to the first maximum value and the first minimum value, and the first obtaining module is specifically configured to:
subtracting the interval voltage from the first maximum value to obtain the second maximum value, and adding the interval voltage to the first minimum value to obtain the second minimum value. In one embodiment, the apparatus further comprises:
the interval voltage determining module is used for measuring flicker values of a plurality of liquid crystal display module samples to obtain a minimum flicker value corresponding to each liquid crystal display module sample, and taking the public voltage corresponding to each minimum flicker value as an actual measurement correction public voltage; subtracting the initial voltage increment from the first maximum value to obtain an initial first maximum value, and adding the initial voltage increment to the first minimum value to obtain an initial first minimum value; wherein the initial first maximum value and the initial first minimum value are within the range of the common voltage; measuring the corresponding flicker values of the common voltage of each liquid crystal display module sample under the conditions of the first maximum value, the initial first maximum value, the first minimum value and the initial first minimum value, and obtaining the predicted correction common voltage of each liquid crystal display module sample under the condition of the initial voltage increment; comparing the actual measurement correction common voltage corresponding to each liquid crystal display module sample with the prediction correction common voltage corresponding to each liquid crystal display module sample to obtain a difference value corresponding to each liquid crystal display module sample, and performing average calculation on the difference value corresponding to each liquid crystal display module sample to obtain an average deviation value of each liquid crystal display module under the initial voltage increment condition; increasing the value of the initial voltage increment, repeatedly obtaining the average deviation value of each liquid crystal display module under the condition of the initial voltage increment, and taking the minimum value of the average deviation values as the minimum average deviation value; and taking the initial voltage increment corresponding to the minimum average deviation value as the interval voltage.
In one embodiment, the third obtaining module is further configured to:
and fitting according to the first maximum value, the second minimum value, the first flicker value, the second flicker value, the third flicker value and the fourth flicker value to obtain a linear relation function of the common voltage and the flicker value, and determining the corrected common voltage of the liquid crystal display panel to be tested according to the linear relation function.
In one embodiment, the third obtaining module is further configured to:
fitting according to the first maximum value, the second maximum value, the first flicker value and the second flicker value to obtain a first linear function of the common voltage and the flicker value; fitting according to the second minimum value, the first minimum value, the third flicker value and the fourth flicker value to obtain a second linear function of the common voltage and the flicker value; and determining the correction common voltage of the liquid crystal display panel to be tested according to the common voltage corresponding to the intersection point between the first linear function and the second linear function.
In one embodiment, the corrected common voltage is composed of the common voltage added to a voltage compensation value.
In one embodiment, the apparatus further comprises:
the voltage compensation value determining module is used for measuring flicker values of a plurality of liquid crystal display module samples respectively to obtain a minimum flicker value corresponding to each liquid crystal display module sample, and taking a public voltage corresponding to each minimum flicker value as an actually-measured correction public voltage; subtracting an initial voltage increment from the first maximum value to obtain an initial first maximum value, and adding an initial voltage increment to the first minimum value to obtain an initial first minimum value, wherein the initial first maximum value and the initial first minimum value are within the range of the common voltage; measuring the corresponding flicker values of the common voltage of each liquid crystal display module sample under the conditions of the first maximum value, the initial first maximum value, the first minimum value and the initial first minimum value, and obtaining the predicted correction common voltage of each liquid crystal display module sample under the condition of the initial voltage increment; comparing the actual measurement correction common voltage corresponding to each liquid crystal display module sample with the prediction correction common voltage corresponding to each liquid crystal display module sample to obtain a difference value corresponding to each liquid crystal display module sample, and performing average calculation on the difference value corresponding to each liquid crystal display module sample to obtain an average deviation value of each liquid crystal display module under the initial voltage increment condition; increasing the value of the initial voltage increment, repeatedly obtaining average deviation values of each liquid crystal display module under the condition of the initial voltage increment, and taking the minimum value of the average deviation values as the minimum average deviation value; and taking the minimum average deviation value as a voltage compensation value.
A computer device comprising a memory storing a computer program and a processor implementing, when executed, a common voltage determination method of a liquid crystal display panel as in any one of the above.
A computer-readable storage medium on which a computer program is stored, the computer program, when executed by a processor, implementing a common voltage determination method for a liquid crystal display panel as in any one of the above.
According to the method, the device, the computer equipment and the storage medium for determining the common voltage of the liquid crystal display panel, firstly, the range of the common voltage corresponding to the liquid crystal display panel to be tested is obtained, and the range of the common voltage is between a first minimum value and a first maximum value; obtaining a second maximum value and a second minimum value according to the first maximum value and the first minimum value, wherein the first maximum value is larger than the second maximum value, and the first minimum value is smaller than the second minimum value; respectively setting the common voltage of the liquid crystal display panel to be tested to the first maximum value, the second minimum value and the first minimum value, and respectively obtaining a first flicker value corresponding to the first maximum value, a second flicker value corresponding to the second maximum value, a third flicker value corresponding to the second minimum value and a fourth flicker value corresponding to the first minimum value; and obtaining the corrected common voltage of the liquid crystal display panel to be detected according to the first maximum value, the second minimum value, the first flicker value, the second flicker value, the third flicker value and the fourth flicker value. Therefore, under the condition of reducing the measurement times and the measurement time of the liquid crystal display panel, the correction common voltage can be obtained by the common voltage determination method of the liquid crystal display panel, so that the production efficiency of the liquid crystal display panel is improved.
Drawings
FIG. 1 is a flow chart illustrating a method for determining a common voltage of a liquid crystal display panel according to an embodiment;
FIG. 2 is a graph showing the relationship between the common voltage and the flicker value of a sample of a liquid crystal display module;
FIG. 3 is a schematic diagram illustrating the flicker generation of a liquid crystal display panel;
FIG. 4 is a flow chart illustrating a method for determining the gap voltage of the LCD panel according to one embodiment;
FIG. 5 is a schematic diagram illustrating a process of obtaining a calibrated common voltage of a liquid crystal display panel under test in one embodiment;
FIG. 6 is a flow chart illustrating a linear function of the common voltage and flicker value according to one embodiment;
FIG. 7 is a flowchart illustrating a method for determining a voltage compensation value of an LCD panel according to another embodiment;
FIG. 8 is a block diagram showing the structure of a common voltage determining apparatus of a liquid crystal display panel in one embodiment;
FIG. 9 is a block diagram showing a configuration of a common voltage determining apparatus of a liquid crystal display panel in another embodiment;
FIG. 10 is a block diagram showing a structure of a common voltage determining apparatus of a liquid crystal display panel in another embodiment;
FIG. 11 is a diagram of the internal structure of a computer device in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and 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.
In one embodiment, as shown in fig. 1, there is provided a common voltage determining method of a liquid crystal display panel, including the steps of:
The range of the common voltage of the lcd panel means that the flicker value of the lcd panel decreases with the increase of the common voltage in the range, and when the common voltage increases to a specific value and then continues to increase, the flicker value of the lcd panel increases with the increase of the common voltage, which is equivalent to two linear straight lines, as shown in fig. 2, the abscissa is VCOM (common voltage), the voltage value is represented by hexadecimal, and the ordinate is flicker (flicker value), wherein the range of the common voltage is 90 to B0, when the common voltage is 90 to A2, the flicker value decreases with the increase of the common voltage, and when the common voltage increases to A2 in the graph, the flicker value increases with the increase of the common voltage. The maximum common voltage in the common voltage range of the liquid crystal display panel is a first maximum value, and the minimum common voltage is a first minimum value.
Specifically, the processor obtains a voltage range of a common voltage of the liquid crystal display panel to be detected, and respectively determines a first maximum value and a first minimum value of the common voltage according to the voltage range of the common voltage.
And 104, obtaining a second maximum value and a second minimum value according to the first maximum value and the first minimum value, wherein the first maximum value is greater than the second maximum value, and the first minimum value is less than the second minimum value.
The second maximum value is on the side of the maximum value of the common voltage range, and the second minimum value is on the side of the minimum value of the common voltage range, that is, the second maximum value is greater than the second minimum value, that is, the first maximum value, the second minimum value and the first minimum value are sequentially in a descending relationship.
The flicker value is used for representing the parameter fluctuation depth of the flicker intensity of the light source, and can also be represented by a flicker index and a flicker percentage. As shown in fig. 3, the diagram is a schematic diagram illustrating the principle of flicker generation of the liquid crystal display panel, wherein the liquid crystal is driven by ac (i.e. driven by positive voltage in the nth frame and driven by negative voltage in the (N + 1) th frame) to control the rotation angle of the liquid crystal, and the rotation angle of the liquid crystal affects the transmittance of the backlight source, and thus the brightness of the liquid crystal display panel. Since the gate voltage (gate voltage) of each frame has a high positive and negative voltage variation, which is coupled to the liquid crystal driving voltage through the parasitic capacitor, the originally symmetrical positive and negative driving voltages are shifted toward the negative voltage direction, so that the positive voltage driving the liquid crystal is small, the negative voltage is large, and the rotation angles of the liquid crystal under the positive voltage and the negative voltage are inconsistent, resulting in the flicker of the liquid crystal display panel. The flicker value of the liquid crystal display panel can be measured by an MSE (modular System Engineering) optical lens.
Specifically, the processor sets the common voltage of the liquid crystal display panel to be measured to the first maximum value, the second minimum value and the first minimum value respectively, and measures the first maximum value, the second minimum value and the first minimum value respectively according to the optical equipment to obtain corresponding flicker values. For example, the processor sets a first maximum value, a second minimum value and a first minimum value for the common voltage of the liquid crystal display panel to be measured respectively, measures a first flicker value corresponding to the first maximum value of the common voltage according to the MSE optical lens, measures a second flicker value corresponding to the second maximum value of the common voltage according to the MSE optical lens, measures a third flicker value corresponding to the second minimum value of the common voltage according to the MSE optical lens, and measures a fourth flicker value corresponding to the first minimum value of the common voltage according to the MSE optical lens.
And 108, obtaining the corrected common voltage of the liquid crystal display panel to be tested according to the first maximum value, the second minimum value, the first flicker value, the second flicker value, the third flicker value and the fourth flicker value.
The correction common voltage of the liquid crystal display panel to be detected is obtained through software of the lighting module, the software realizes calculation through programming statements to obtain the correction common voltage, the flicker value corresponding to the correction common voltage is minimum, the flicker value meets the requirement specification of a product, and the requirement specification of the product is to ensure that the flicker value is within 10%.
Specifically, a first maximum value, a second minimum value, a first flicker value, a second flicker value, a third flicker value and a fourth flicker value of the common voltage are input into software of a lighting module for calculation, so that a corrected common voltage of the liquid crystal display panel to be detected is obtained, and the flicker value corresponding to the corrected common voltage is minimum.
In the method for determining the common voltage of the liquid crystal display panel, firstly, the range of the common voltage corresponding to the liquid crystal display panel to be detected is obtained, and the range of the common voltage is between a first minimum value and a first maximum value; obtaining a second maximum value and a second minimum value according to the first maximum value and the first minimum value, wherein the first maximum value is larger than the second maximum value, and the first minimum value is smaller than the second minimum value; respectively setting the common voltage of the liquid crystal display panel to be tested to the first maximum value, the second minimum value and the first minimum value, and respectively obtaining a first flicker value corresponding to the first maximum value, a second flicker value corresponding to the second maximum value, a third flicker value corresponding to the second minimum value and a fourth flicker value corresponding to the first minimum value; and obtaining the corrected common voltage of the liquid crystal display panel to be detected according to the first maximum value, the second minimum value, the first flicker value, the second flicker value, the third flicker value and the fourth flicker value. Therefore, in the case of reducing the number of times of measurement and the measurement time of the liquid crystal display panel, the correction common voltage can be obtained by the common voltage determining method of the liquid crystal display panel, thereby improving the production efficiency of the liquid crystal display panel.
In an alternative embodiment, obtaining the second maximum value and the second minimum value according to the first maximum value and the first minimum value includes: subtracting the interval voltage from the first maximum value to obtain the second maximum value, and adding the interval voltage to the first minimum value to obtain the second minimum value. The interval voltage is obtained by measuring the liquid crystal display module samples of the same model. Therefore, the second maximum value and the second minimum value are determined through the interval voltage, so that the corresponding flicker values are respectively measured according to the first maximum value, the second minimum value and the first minimum value, then the corrected common voltage is obtained, namely the corrected common voltage can be obtained by measuring the flicker values four times after the interval voltage is set, the times of measuring the liquid crystal display panel are reduced, and the measuring time is shortened, so that the production efficiency of the liquid crystal display panel is improved.
The foregoing embodiment of fig. 1 illustrates a scheme for determining the common voltage of the liquid crystal display panel according to the first maximum value, the second minimum value and the first minimum value of the common voltage, and on the basis of the embodiment shown in fig. 1, a possible implementation manner of a determination manner of the gap voltage is provided, as shown in fig. 4, the determination manner of the gap voltage includes the following steps:
In order to solve the problem of flicker value of the liquid crystal display panel, positive voltage and negative voltage for driving the liquid crystal are symmetrical by correcting common voltage, the common voltage is adjusted by a register in a Drive IC (Drive Integrated Circuit), and the adjustable range of the register value is large, for example, between 0 and-2V, so that the common voltage range is found by a plurality of liquid crystal display module samples, the flicker value in the range linearly changes along with the common voltage, the correction common voltage is searched in the range through an algorithm, and the flicker value corresponding to the correction common voltage is minimum.
Specifically, different voltage values are set for public voltages of a plurality of liquid crystal display module samples of the same product model, flicker value measurement is carried out, a flicker value of each liquid crystal display module sample is obtained through measurement, a minimum flicker value of each liquid crystal display module sample can be obtained according to the flicker value, public voltages corresponding to the minimum flicker values are used as actual measurement correction public voltages, a public voltage range can be obtained through liquid crystal display module sample data, namely the flicker value and the public voltages in the range are in a linear relation, and the flicker value of each liquid crystal display module sample corresponds to one actual measurement correction public voltage. For example, common voltages are respectively set for 20 liquid crystal display module samples of the same product model, and because the common voltage range is in a negative value range, the flicker values of 20 groups of samples can be respectively measured according to the voltage step length of 0.01V from 0 to-0.5V, each group of flicker values corresponds to a minimum flicker value, the minimum flicker value is within 10%, the common voltage corresponding to the minimum flicker value is an actually measured and corrected common voltage, and 20 actually measured and corrected common voltages are obtained through measurement.
The common voltage range is obtained by measuring sample data of a plurality of liquid crystal display modules, for example, the common voltage range is between-0.1V and-0.2V, and in practical use, because the common voltage range is in a negative value range, absolute value comparison of the common voltage is generally adopted for the common voltage, namely, a first maximum value of the common voltage is-0.2V, a first minimum value is-0.1V, an initial second maximum value and an initial second minimum value are in the common voltage range, wherein the common voltage range is obtained. The initial voltage increment may be 0.01V.
Specifically, a first maximum value and a first minimum value of the common voltage are determined according to the range of the common voltage, an initial second maximum value is obtained by subtracting the initial electric quantity increment from the maximum value, and an initial second minimum value is obtained by adding the initial voltage increment to the first minimum value, for example, the range of the common voltage is-0.1V to-0.2V, the initial voltage increment is 0.01V, the initial second maximum value is-0.19V, and the initial second minimum value is-0.11V.
Specifically, flicker value measurement is performed by respectively setting common voltages of a plurality of liquid crystal display module samples to be a first maximum value, an initial first maximum value, a first minimum value and an initial first minimum value, flicker values of each sample can be obtained through MSE optical lens measurement, and a prediction correction common voltage is obtained by each liquid crystal display module sample according to the first maximum value, the initial first maximum value, the first minimum value, the initial first minimum value and the flicker values. For example, the flicker values of 20 samples of the liquid crystal display module at common voltages of-0.2V, -0.19V, -0.11V and-0.1V are measured, and the predicted corrected common voltage of each sample at an initial voltage increment of 0.01V is obtained according to the common voltages of the flicker values of each sample of-0.2V, -0.19V, -0.11V and-0.1V, namely 20 predicted corrected common voltages are obtained.
And step 408, comparing the actually measured corrected common voltage corresponding to each liquid crystal display module sample with the predicted corrected common voltage corresponding to each liquid crystal display module sample to obtain a difference value corresponding to each liquid crystal display module sample, and performing average calculation on the difference values corresponding to each liquid crystal display module sample to obtain an average deviation value of each liquid crystal display module under the initial voltage increment condition.
Specifically, the actually measured corrected common voltage of each lcd module sample is compared with the predicted corrected common voltage of the module sample, for example, by subtraction, to obtain the same number of differences as the lcd modules, and then the same number of differences as the lcd module samples are averaged to obtain the average deviation value at the time of the initial voltage increment. For example, when the number of the samples of the liquid crystal display module is 20, the difference value of each sample is obtained by subtracting the predicted corrected common voltage of the sample from the measured corrected common voltage of each sample, then 20 difference values are obtained, and the 20 difference values are subjected to numerical average calculation to obtain the average deviation value at the time of initial voltage increment.
Here, each increased voltage increment is an initial voltage increment, for example, when the initial voltage increment is 0.01V, the second increased voltage increment is 0.02V, and the nth increased voltage increment is 0.01V × n.
Specifically, after increasing the value of the initial voltage increment each time, obtaining average deviation values of a plurality of liquid crystal display module samples of the same product type, and obtaining a minimum average deviation value by comparing the average deviation values at different voltage increments, wherein the minimum average deviation value can be zero, and the number of the average deviation values is the same as the number of times of increasing the voltage increments.
In step 412, the initial voltage increment corresponding to the minimum average deviation value is used as the interval voltage.
Specifically, when the liquid crystal display module sample to be tested is actually measured, the liquid crystal display module sample to be tested is tested by taking the voltage increment corresponding to the minimum average deviation value as the interval voltage.
In this embodiment, the common voltage range and the interval voltage when the liquid crystal display module to be tested is obtained through testing a plurality of liquid crystal display module samples of the same product model, thereby only need to test the first maximum value, the second minimum value of public voltage, the flicker value when the first minimum value just can obtain and rectify the public voltage when the liquid crystal display module to be tested is actually tested, measure the flicker value of the module to be tested under the rectification public voltage after obtaining and rectify the public voltage, the flicker value is within 10%, if the flicker value is greater than 10%, then the liquid crystal display module is determined not to meet the requirements, and the liquid crystal display module belongs to a defective product. Therefore, the determination mode of the interval voltage reduces the measurement times and the measurement time of the liquid crystal display, and improves the production efficiency of the liquid crystal display panel.
In one embodiment, obtaining the corrected common voltage of the lcd panel under test according to the first maximum value, the second minimum value, the first flicker value, the second flicker value, the third flicker value, and the fourth flicker value includes:
and fitting to obtain a linear relation function of the public voltage and the flicker value according to the first maximum value, the second minimum value, the first flicker value, the second flicker value, the third flicker value and the fourth flicker value, and determining the corrected public voltage of the liquid crystal display panel to be tested according to the linear relation function.
Wherein, the flicker value and the common voltage are in a linear relation in the common voltage range.
Specifically, a linear relation between the flicker value and the common voltage is obtained through fitting according to a first maximum value, a second minimum value, a first flicker value, a second flicker value, a third flicker value and a fourth flicker value of the common voltage, wherein the flicker value and the common voltage are in a linear relation in a common voltage range. And determining the corrected common voltage of the liquid crystal display panel to be detected according to the linear relation function and algorithm calculation.
In this embodiment, after four flicker value measurements, a linear relation function of the common voltage and the flicker value is obtained according to the first maximum value, the second minimum value, the first flicker value, the second flicker value, the third flicker value, and the fourth flicker value of the common voltage, and then the corrected common voltage is obtained according to the function. Therefore, compared with the time for measuring by adopting a dichotomy method, the time for measuring the correction common voltage is shortened by 3 seconds, the production efficiency is improved, and the production cost of the module is reduced.
In one embodiment, as shown in fig. 5, fitting to obtain a linear relationship function between the common voltage and the flicker value according to a first maximum value, a second maximum value, a first minimum value, a second minimum value, a first flicker value, a second flicker value, a third flicker value, and a fourth flicker value of the common voltage, and determining a corrected common voltage of the liquid crystal display panel to be tested according to the linear relationship function includes:
Specifically, the slope and the vertical axis intercept of the first linear function are obtained according to the first maximum value, the second maximum value, the first flicker value and the second flicker value of the common voltage. For example, let the interval voltage be d, let the first maximum value of the common voltage be Vmax, the second maximum value be Vmax-d, the corresponding first flicker value be flicker1, the second flicker value be flicker2, and let the first linear function expression be: y = k1 x + b, k1 and b being the slope and intercept, respectively, of the first linear function, then:
k1＝(flicker2-flicker1)/(Vmax-d-Vmax)
b＝flcker1-k1*Vmax
referring to FIG. 6, a straight line 1 is the first linear function.
Specifically, the slope and the vertical axis intercept of the second linear function are obtained according to the second minimum value, the first minimum value, the third flicker value and the fourth flicker value of the common voltage. For example, let the interval voltage be d, let the second minimum value be Vmin + d, the first minimum value be Vmin, the corresponding third flicker value be flicker3, the fourth flicker value be flicker4, and let the second linear function expression be: y = k2 x + c, k2 and c being the slope and intercept, respectively, of the second linear function, then:
k2＝(flicker3-flicker4)/(Vmin+d-Vmin)
c＝flcker4-k2*Vmin
referring to FIG. 6, the line 2 is the second linear function.
Specifically, an intersection point between the first linear function and the second linear function is obtained through software calculation of the lighting module, and a correction common voltage of the liquid crystal display panel to be detected is determined according to the intersection point. For example, the lighting module software may determine the intersection point by taking the first linear function equal to the second linear function, i.e. when k1 x + b = k2 x + c:
wherein, when the voltage compensation value is not zero, x is obtained by calculation 0 To correct the common voltage value.
In this embodiment, after four flicker value measurements, a first linear function is determined according to a first maximum value, a second maximum value, a first flicker value and a second flicker value, a second linear function of the common voltage and the flicker value is obtained by fitting according to the second minimum value, the first minimum value, the third flicker value and the fourth flicker value, and then a corrected common voltage is determined according to the first linear function and the second linear function. Therefore, compared with the time consumed by adopting dichotomy measurement, the time consumed by measuring the correction common voltage is shortened by 3 seconds, the production efficiency is improved, and the production cost of the module is reduced.
In one embodiment, correcting the common voltage consists of adding the common voltage to a voltage compensation value. Specifically, when the minimum average deviation value obtained by comparing the average deviation values is zero, that is, the voltage compensation value is zero, the common voltage corresponding to the intersection point between the first linear function and the second linear function is taken as the corrected common voltage; and when the minimum average deviation value obtained by comparing the average deviation values is not zero, namely the voltage compensation value is zero, taking the minimum average deviation value as the voltage compensation value, and adding the voltage compensation value to the first common voltage to obtain the corrected common voltage of the liquid crystal display panel to be detected. In this embodiment, the calculated corrected common voltage is made to approach the actual corrected common voltage of the module by the voltage compensation value, and then whether the flicker value corresponding to the corrected common voltage is within the required specification of the product (for example, whether the flicker value is within 10%) is measured, so as to optimize the corrected common voltage value, and the corrected common voltage can be obtained by measuring the corrected common voltage.
In one embodiment, as shown in fig. 7, a method for determining the voltage compensation value is provided, which includes the following steps:
The number of the average deviation values is the same as the number of times of increasing the voltage increment, and the voltage increment increased each time is the initial voltage increment, for example, when the initial voltage increment is 0.01V, the voltage increment increased for the second time is 0.02V, and the voltage increment increased for the nth time is 0.01V × n, but after the voltage increment is increased to a certain value, a curve passing through the first maximum value, the second maximum value, the first flicker value, and the second flicker value is shifted to the left, thereby causing distortion. Therefore, after the voltage increment is increased to the maximum, when the corresponding average deviation values are not zero at different voltage increments, that is, the minimum average deviation value is not zero, the minimum average deviation value needs to be compensated by the voltage compensation value, so that the flicker value corresponding to the corrected common voltage is minimum and meets the required specification.
In step 712, the minimum average deviation value is used as a voltage compensation value.
When the minimum average deviation value obtained by comparing the average deviation values is not zero, for example, the minimum average deviation value is-0.01V, the minimum average deviation value is used as the voltage compensation value.
In this embodiment, a common voltage range and an interval voltage when a liquid crystal display module to be tested is actually tested are obtained by testing a plurality of liquid crystal display module samples of the same product type, when a minimum average deviation value obtained by comparing average deviation values is not zero, the minimum average deviation value is required to be used as a voltage compensation value, the obtained corrected common voltage is made to approach the actual corrected common voltage of the module by increasing the voltage compensation value, and then whether a flicker value corresponding to the corrected common voltage is within a required specification of a product (for example, whether the flicker value is within 10%) is measured, so that the corrected common voltage value is optimized, and the corrected common voltage can be obtained by measuring the corrected common voltage.
It should be understood that although the various steps in the flowcharts of fig. 1, 4-5, 7 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not limited to being performed in the exact order illustrated and, unless explicitly stated herein, may be performed in other orders. Moreover, at least some of the steps in fig. 1, 4-5, and 7 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of performing the steps or stages is not necessarily sequential, but may be performed alternately or alternatively with other steps or at least some of the steps or stages in other steps.
In one embodiment, as shown in fig. 8, there is provided a common voltage determining apparatus of a liquid crystal display panel, the apparatus 800 including: an obtaining module 802, a first obtaining module 804, a second obtaining module 806, and a third obtaining module 808, wherein:
the obtaining module 802 is configured to obtain a range of a common voltage corresponding to the liquid crystal display panel to be tested, where the range of the common voltage is from a first minimum value to a first maximum value.
A first obtaining module 804, configured to obtain a second maximum value and a second minimum value according to the first maximum value and the first minimum value, where the first maximum value is greater than the second maximum value, and the first minimum value is smaller than the second minimum value.
The second obtaining module 806 is configured to set the common voltage of the liquid crystal display panel to be tested to the first maximum value, the second minimum value, and the first minimum value, and obtain a first flicker value corresponding to the first maximum value, a second flicker value corresponding to the second maximum value, a third flicker value corresponding to the second minimum value, and a fourth flicker value corresponding to the first minimum value, respectively.
A third obtaining module 808, configured to obtain the corrected common voltage of the liquid crystal display panel to be tested according to the first maximum value, the second minimum value, the first flicker value, the second flicker value, the third flicker value, and the fourth flicker value.
In one embodiment, the first obtaining module 804 is specifically configured to subtract an interval voltage from the first maximum value to obtain the second maximum value, and add the interval voltage to the first minimum value to obtain the second minimum value. .
In one embodiment, as shown in fig. 9, the apparatus 800 further comprises an interval voltage determination module 810, wherein:
the interval voltage determining module 810 is configured to perform flicker value measurement on each of the plurality of liquid crystal display module samples to obtain a minimum flicker value corresponding to each of the liquid crystal display module samples, and use a common voltage corresponding to each of the minimum flicker values as an actually measured correction common voltage; subtracting the initial voltage increment from the first maximum value to obtain an initial first maximum value, and adding the initial voltage increment to the first minimum value to obtain an initial first minimum value; wherein the initial first maximum value and the initial first minimum value are within the range of the common voltage; measuring the corresponding flicker values of the common voltage of each liquid crystal display module sample under the conditions of the first maximum value, the initial first maximum value, the first minimum value and the initial first minimum value, and obtaining the predicted correction common voltage of each liquid crystal display module sample under the condition of the initial voltage increment; comparing the actual measurement correction common voltage corresponding to each liquid crystal display module sample with the prediction correction common voltage corresponding to each liquid crystal display module sample to obtain a difference value corresponding to each liquid crystal display module sample, and carrying out average calculation on the difference value corresponding to each liquid crystal display module sample to obtain an average deviation value of each liquid crystal display module under the initial voltage increment condition; increasing the value of the initial voltage increment, repeatedly obtaining the average deviation value of each liquid crystal display module under the condition of the initial voltage increment, and taking the minimum value of the average deviation values as the minimum average deviation value; and taking the initial voltage increment corresponding to the minimum average deviation value as the interval voltage.
In an embodiment, the third obtaining module 808 is further configured to obtain a linear relation function between the common voltage and the flicker value according to the first maximum value, the second minimum value, the first flicker value, the second flicker value, the third flicker value, and the fourth flicker value, and determine the corrected common voltage of the liquid crystal display panel to be tested according to the linear relation function.
In an embodiment, the third obtaining module 808 is further configured to obtain a first linear function of the common voltage and the flicker value according to the first maximum value, the second maximum value, the first flicker value, and the second flicker value; fitting according to the second minimum value, the first minimum value, the third flicker value and the fourth flicker value to obtain a second linear function of the common voltage and the flicker value; and determining the correction common voltage of the liquid crystal display panel to be tested according to the common voltage corresponding to the intersection point between the first linear function and the second linear function.
In one embodiment, the corrected common voltage consists of the common voltage added to a voltage compensation value.
In one embodiment, as shown in fig. 10, the apparatus 800 further comprises a voltage compensation value determining module 814, wherein:
a voltage compensation value determining module 814, configured to perform flicker value measurement on each of the plurality of liquid crystal display module samples to obtain a minimum flicker value corresponding to each of the liquid crystal display module samples, and use a common voltage corresponding to each of the minimum flicker values as an actually measured correction common voltage; subtracting an initial voltage increment from the first maximum value to obtain an initial first maximum value, and adding an initial voltage increment to the first minimum value to obtain an initial first minimum value, wherein the initial first maximum value and the initial first minimum value are within the range of the common voltage; measuring the corresponding flicker values of the common voltage of each liquid crystal display module sample under the conditions of the first maximum value, the initial first maximum value, the first minimum value and the initial first minimum value, and obtaining the predicted correction common voltage of each liquid crystal display module sample under the condition of the initial voltage increment; comparing the actual measurement correction common voltage corresponding to each liquid crystal display module sample with the prediction correction common voltage corresponding to each liquid crystal display module sample to obtain a difference value corresponding to each liquid crystal display module sample, and performing average calculation on the difference value corresponding to each liquid crystal display module sample to obtain an average deviation value of each liquid crystal display module under the initial voltage increment condition; increasing the value of the initial voltage increment, repeatedly obtaining average deviation values of each liquid crystal display module under the condition of the initial voltage increment, and taking the minimum value of the average deviation values as the minimum average deviation value; and taking the minimum average deviation value as a voltage compensation value.
For specific limitations of the common voltage determining apparatus of the liquid crystal display panel, reference may be made to the above limitations of the common voltage determining method of the liquid crystal display panel, and details are not repeated here. The respective modules in the common voltage determining apparatus of the liquid crystal display panel described above may be wholly or partially implemented by software, hardware, and a combination thereof. The modules can be embedded in a hardware form or independent of a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as shown in fig. 11. The computer device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the computer device is used for storing common voltage determination data of the liquid crystal display panel. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a common voltage determination method of a liquid crystal display panel.
Those skilled in the art will appreciate that the architecture shown in fig. 11 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having stored therein a computer program, the processor implementing the steps of the above-described method embodiments when executing the computer program.
In an embodiment, a computer-readable storage medium is provided, on which a computer program is stored which, when being executed by a processor, carries out the steps of the above-mentioned method embodiments.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), for example.
All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method for determining a common voltage of a liquid crystal display panel, the method comprising:
acquiring a range of a common voltage corresponding to a liquid crystal display panel to be detected, wherein the range of the common voltage is from a first minimum value to a first maximum value;
obtaining a second maximum value and a second minimum value according to the first maximum value and the first minimum value, wherein the first maximum value is larger than the second maximum value, and the first minimum value is smaller than the second minimum value;
respectively setting the common voltage of the liquid crystal display panel to be tested to be the first maximum value, the second minimum value and the first minimum value, and respectively obtaining a first flicker value corresponding to the first maximum value, a second flicker value corresponding to the second maximum value, a third flicker value corresponding to the second minimum value and a fourth flicker value corresponding to the first minimum value;
and obtaining the corrected common voltage of the liquid crystal display panel to be detected according to the first maximum value, the second minimum value, the first flicker value, the second flicker value, the third flicker value and the fourth flicker value.
2. The method of claim 1, wherein obtaining a second maximum value and a second minimum value based on the first maximum value and the first minimum value comprises:
subtracting the interval voltage from the first maximum value to obtain the second maximum value, and adding the interval voltage to the first minimum value to obtain the second minimum value.
3. The method of claim 2, wherein the interval voltage is obtained by:
respectively measuring flicker values of a plurality of liquid crystal display module samples to obtain the minimum flicker value corresponding to each liquid crystal display module sample, and taking the common voltage corresponding to each minimum flicker value as the actual measurement correction common voltage;
subtracting an initial voltage increment from the first maximum value to obtain an initial first maximum value, and adding an initial voltage increment to the first minimum value to obtain an initial first minimum value; wherein the initial first maximum value and the initial first minimum value are within a range of the common voltage;
measuring the corresponding flicker values of the common voltage of each liquid crystal display module sample under the conditions of the first maximum value, the initial first maximum value, the first minimum value and the initial first minimum value, and obtaining the predicted correction common voltage of each liquid crystal display module sample under the condition of the initial voltage increment;
comparing the actual measurement correction common voltage corresponding to each liquid crystal display module sample with the prediction correction common voltage corresponding to each liquid crystal display module sample to obtain a difference value corresponding to each liquid crystal display module sample, and performing average calculation on the difference value corresponding to each liquid crystal display module sample to obtain an average deviation value of each liquid crystal display module under the initial voltage increment condition;
increasing the value of the initial voltage increment, repeatedly obtaining average deviation values of all liquid crystal display modules under the condition of the initial voltage increment, and taking the minimum value of all the average deviation values as the minimum average deviation value;
and taking the initial voltage increment corresponding to the minimum average deviation value as the interval voltage.
4. The method according to claim 1, wherein the obtaining the corrected common voltage of the lcd panel under test according to the first maximum value, the second minimum value, the first flicker value, the second flicker value, the third flicker value, and the fourth flicker value comprises:
fitting according to the first maximum value, the second minimum value, the first flicker value, the second flicker value, the third flicker value and the fourth flicker value to obtain a linear relation function of the public voltage and the flicker value, and determining the corrected public voltage of the liquid crystal display panel to be tested according to the linear relation function.
5. The method according to claim 4, wherein the fitting according to the first maximum value, the second maximum value, the first minimum value, the first flicker value, the second minimum value, the second flicker value, the third flicker value and the fourth flicker value to obtain a linear relation function of the common voltage and the flicker value, and determining the corrected common voltage of the liquid crystal display panel to be tested according to the linear relation function comprises:
fitting according to the first maximum value, the second maximum value, the first flicker value and the second flicker value to obtain a first linear function of the common voltage and the flicker value;
fitting according to the second minimum value, the first minimum value, the third flicker value and the fourth flicker value to obtain a second linear function of the common voltage and the flicker value;
and determining the correction common voltage of the liquid crystal display panel to be detected according to the common voltage corresponding to the intersection point between the first linear function and the second linear function.
6. The method of claim 5, wherein the correcting the common voltage consists of adding the common voltage to a voltage compensation value.
7. The method of claim 6, wherein the voltage compensation value is determined by:
respectively measuring flicker values of a plurality of liquid crystal display module samples to obtain a minimum flicker value corresponding to each liquid crystal display module sample, and taking a common voltage corresponding to each minimum flicker value as an actually measured correction common voltage;
subtracting an initial voltage increment from the first maximum value to obtain an initial first maximum value, and adding an initial voltage increment to the first minimum value to obtain an initial first minimum value, wherein the initial first maximum value and the initial first minimum value are within the range of the common voltage;
measuring the corresponding flicker values of the common voltage of each liquid crystal display module sample under the conditions of the first maximum value, the initial first maximum value, the first minimum value and the initial first minimum value, and obtaining the predicted correction common voltage of each liquid crystal display module sample under the condition of the initial voltage increment;
comparing the actual measurement correction common voltage corresponding to each liquid crystal display module sample with the prediction correction common voltage corresponding to each liquid crystal display module sample to obtain a difference value corresponding to each liquid crystal display module sample, and performing average calculation on the difference value corresponding to each liquid crystal display module sample to obtain an average deviation value of each liquid crystal display module under the initial voltage increment condition;
increasing the value of the initial voltage increment, repeatedly obtaining average deviation values of all liquid crystal display modules under the condition of the initial voltage increment, and taking the minimum value of all the average deviation values as the minimum average deviation value;
and taking the minimum average deviation value as a voltage compensation value.
8. An apparatus for determining a common voltage of a liquid crystal display panel, the apparatus comprising:
the acquisition module is used for acquiring the range of the common voltage corresponding to the liquid crystal display panel to be detected, wherein the range of the common voltage is between a first minimum value and a first maximum value;
a first obtaining module, configured to obtain a second maximum value and a second minimum value according to the first maximum value and the first minimum value, where the first maximum value is greater than the second maximum value, and the first minimum value is smaller than the second minimum value;
a second obtaining module, configured to set the common voltage of the liquid crystal display panel to be tested to the first maximum value, the second minimum value, and the first minimum value, and obtain a first flicker value corresponding to the first maximum value, a second flicker value corresponding to the second maximum value, a third flicker value corresponding to the second minimum value, and a fourth flicker value corresponding to the first minimum value, respectively;
and the third obtaining module is used for obtaining the corrected public voltage of the liquid crystal display panel to be detected according to the first maximum value, the second minimum value, the first flicker value, the second flicker value, the third flicker value and the fourth flicker value.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the method of any of claims 1 to 7.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 7.
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