Method, device and computer equipment for determining common voltage of liquid crystal display panel

Abstract

The present application relates to a method, device, computer equipment and storage medium for determining the common voltage of a liquid crystal display panel. The method includes: obtaining the range of the common voltage corresponding to the liquid crystal display panel to be tested, the range of the common voltage being 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, the first maximum value being greater than the second maximum value, and the first minimum value being less than the second minimum value; 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 respectively based on the liquid crystal display panel to be tested; obtaining a corrected common voltage of the liquid crystal display panel to be tested according to the first maximum value, the second maximum value, the second minimum value, the first minimum value, the first flicker value, the second flicker value, the third flicker value, and the fourth flicker value.

Description

Technical Field

[0001] The present application relates to the technical field of liquid crystal display panel testing, and in particular to a method, device, computer equipment and storage medium for determining a common voltage of a liquid crystal display panel. Background Art

[0002] With the development of liquid crystal display panel testing technology, the requirements for liquid crystal display panels are getting higher and higher. Among them, the liquid crystal display panel (Liquid Crystal Display, LCD for short) applies different voltage signals to the pixel electrodes to adjust the deflection angle of the liquid crystal molecules, so that the light transmittance of the liquid crystal words changes, thereby realizing the display of different grayscale images. When the brightness of the liquid crystal display panel changes from bright to dark, it means that the liquid crystal display panel flickers, and the frequency of the flicker is within the range that the human eye can perceive. When the liquid crystal display panel flickers, it will affect the display effect of the liquid crystal display panel. Among them, the larger the flicker value (Flicker) of the liquid crystal display panel, the more flickering the liquid crystal display panel will be when it is displayed, and the easier it is for the human eye to fatigue.

[0003] In the related art, in order to solve the problem of flicker value of LCD panel, a traversal method or a binary method is used to perform multiple flicker value tests on the LCD panel, and the flicker value of the LCD panel is minimized by determining the corrected common voltage of the LCD panel.

[0004] However, when the flicker value test of the liquid crystal display panel is performed using the traversal method or the binary method, the number of tests is large and the time is long, resulting in low production efficiency of the liquid crystal display panel. Summary of the invention

[0005] Based on this, it is necessary to provide a method, device, computer equipment and storage medium for determining the common voltage of a liquid crystal display panel in order to solve the above technical problems.

[0006] A method for determining a common voltage of a liquid crystal display panel, the method comprising:

[0007] Obtain a range of a common voltage corresponding to the liquid crystal display panel to be tested, the range of the common voltage being between a first minimum value and a first maximum value; obtain a second maximum value and a second minimum value according to the first maximum value and the first minimum value, the first maximum value being greater than the second maximum value, and the first minimum value being less than the second minimum value; set the common voltage of the liquid crystal display panel to be tested to the first maximum value, the second maximum value, the second minimum value and the first minimum value, respectively, 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; obtain a corrected common voltage of the liquid crystal display panel to be tested according to the first maximum value, the second maximum value, the second minimum value, the first minimum value, the first flicker value, the second flicker value, the third flicker value and the fourth flicker value.

[0008] In one embodiment, obtaining a second maximum value and a second minimum value according to the first maximum value and the first minimum value comprises:

[0009] The second maximum value is obtained by subtracting the interval voltage from the first maximum value, and the second minimum value is obtained by adding the interval voltage to the first minimum value.

[0010] In one embodiment, the interval voltage is obtained by:

[0011] The flicker values ​​of multiple liquid crystal display module samples are measured respectively to obtain the minimum flicker value corresponding to each liquid crystal display module sample, and the common voltage corresponding to each minimum flicker value is used as the measured correction common voltage; the initial voltage increment is subtracted from the first maximum value to obtain the initial first maximum value, and the initial first minimum value is added to the first minimum value to obtain the initial first minimum value; wherein the initial first maximum value and the initial first minimum value are within the range of the common voltage; the flicker values ​​corresponding to 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 are measured, and the flicker values ​​corresponding to 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 are obtained, and the conditions of the initial voltage of each liquid crystal display module sample are obtained. Predicted correction common voltage under incremental conditions; comparing the measured correction common voltage corresponding to each LCD module sample with the predicted correction common voltage corresponding to each LCD module sample, obtaining the difference corresponding to each LCD module sample, and averaging the difference corresponding to each LCD module sample to obtain the average deviation value of each LCD module under the initial voltage increment condition; increasing the numerical value of the initial voltage increment, and repeatedly obtaining the average deviation value of each LCD module under the initial voltage increment condition, taking the minimum value of each average deviation value as the minimum average deviation value; taking the initial voltage increment corresponding to the minimum average deviation value as the interval voltage.

[0012] In one embodiment, obtaining a corrected common voltage of the liquid crystal display panel to be tested according to the first maximum value, the second maximum value, the second minimum value, the first minimum value, the first flicker value, the second flicker value, the third flicker value, and the fourth flicker value includes:

[0013] A linear relationship function between the common voltage and the flicker value is fitted according to the first maximum value, the second maximum value, the second minimum value, the first minimum value, the first flicker value, the second flicker value, the third flicker value, and the fourth flicker value, and a corrected common voltage of the liquid crystal display panel to be tested is determined according to the linear relationship function.

[0014] In one embodiment, a linear relationship function between a common voltage and a flicker value is obtained by 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, and a correction common voltage of the liquid crystal display panel to be tested is determined according to the linear relationship function, including:

[0015] A first linear function of the common voltage and the flicker value is obtained by fitting the first maximum value, the second maximum value, the first flicker value, and the second flicker value; a second linear function of the common voltage and the flicker value is obtained by fitting the second minimum value, the first minimum value, the third flicker value, and the fourth flicker value; and a correction common voltage of the liquid crystal display panel to be tested is determined according to the common voltage corresponding to the intersection of the first linear function and the second linear function. In one embodiment, the correction common voltage is formed by adding the common voltage to the voltage compensation value.

[0016] In one embodiment, the voltage compensation value is obtained by:

[0017] The flicker values ​​of multiple liquid crystal display module samples are measured respectively to obtain the minimum flicker value corresponding to each liquid crystal display module sample, and the common voltage corresponding to each minimum flicker value is used as the measured correction common voltage; the initial voltage increment is subtracted from the first maximum value to obtain the initial first maximum value, and the initial voltage increment is added to the first minimum value to obtain the initial first minimum value, wherein the initial first maximum value and the initial first minimum value are within the range of the common voltage; the flicker value corresponding to 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 is measured, and the flicker value 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 is obtained. Predicted correction common voltage under the initial voltage increment condition; comparing the measured correction common voltage corresponding to each liquid crystal display module sample with the predicted correction common voltage corresponding to each liquid crystal display module sample, obtaining the difference corresponding to each liquid crystal display module sample, and averaging the difference corresponding to each liquid crystal display module sample to obtain the average deviation value of each liquid crystal display module under the initial voltage increment condition; increasing the numerical value of the initial voltage increment, and repeatedly obtaining the average deviation value of each liquid crystal display module under the initial voltage increment condition, taking the minimum value of each average deviation value as the minimum average deviation value; taking the minimum average deviation value as the voltage compensation value.

[0018] A common voltage determination device for a liquid crystal display panel, the device comprising:

[0019] An acquisition module, used for acquiring a range of a common voltage corresponding to the liquid crystal display panel to be tested, where the range of the common voltage is between a first minimum value and a first maximum value;

[0020] 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, wherein the first maximum value is greater than the second maximum value, and the first minimum value is less than the second minimum value;

[0021] a second obtaining module, used for setting the common voltage of the liquid crystal display panel to be tested to the first maximum value, the second maximum value, the second minimum value and the first minimum value, respectively, and 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, respectively;

[0022] The third obtaining module is used to obtain the corrected common voltage of the liquid crystal display panel to be tested according to the first maximum value, the second maximum value, the second minimum value, the first minimum value, the first flicker value, the second flicker value, the third flicker value, and the fourth flicker value.

[0023] 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 used to:

[0024] The first maximum value is subtracted from the interval voltage to obtain the second maximum value, and the first minimum value is added to the interval voltage to obtain the second minimum value. In one embodiment, the device further includes:

[0025] The interval voltage determination module is used to measure the flicker value of multiple liquid crystal display module samples respectively to obtain the minimum flicker value corresponding to each liquid crystal display module sample, and use the common voltage corresponding to each minimum flicker value as the measured correction common voltage; subtract the initial voltage increment from the first maximum value to obtain the initial first maximum value, and add the initial voltage increment to the first minimum value to obtain the initial first minimum value; wherein the initial first maximum value and the initial first minimum value are within the range of the common voltage; measure the flicker value corresponding to 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 obtain the corresponding common voltage of each liquid crystal display module sample. The predicted corrected common voltage under the initial voltage increment condition; comparing the 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, obtaining the difference corresponding to each liquid crystal display module sample, and averaging the difference corresponding to each liquid crystal display module sample to obtain the average deviation value of each liquid crystal display module under the initial voltage increment condition; increasing the numerical value of the initial voltage increment, and repeatedly obtaining the average deviation value of each liquid crystal display module under the initial voltage increment condition, taking the minimum value of each average deviation value as the minimum average deviation value; taking the initial voltage increment corresponding to the minimum average deviation value as the interval voltage.

[0026] In one embodiment, the third obtaining module is further used for:

[0027] A linear relationship function between the common voltage and the flicker value is fitted according to the first maximum value, the second maximum value, the second minimum value, the first minimum value, the first flicker value, the second flicker value, the third flicker value, and the fourth flicker value, and a corrected common voltage of the liquid crystal display panel to be tested is determined according to the linear relationship function.

[0028] In one embodiment, the third obtaining module is further used for:

[0029] A first linear function of the common voltage and the flicker value is fitted according to the first maximum value, the second maximum value, the first flicker value and the second flicker value; a second linear function of the common voltage and the flicker value is fitted according to the second minimum value, the first minimum value, the third flicker value and the fourth flicker value; and a corrected common voltage of the liquid crystal display panel to be tested is determined according to the common voltage corresponding to the intersection of the first linear function and the second linear function.

[0030] In one embodiment, the corrected common voltage is formed by adding the common voltage to a voltage compensation value.

[0031] In one embodiment, the device further comprises:

[0032] A voltage compensation value determination module is used to measure the flicker value of multiple liquid crystal display module samples respectively to obtain the minimum flicker value corresponding to each liquid crystal display module sample, and use the common voltage corresponding to each minimum flicker value as the measured correction common voltage; subtract the initial voltage increment from the first maximum value to obtain the initial first maximum value, and add the initial voltage increment to the first minimum value to obtain the initial first minimum value, wherein the initial first maximum value and the initial first minimum value are within the range of the common voltage; measure the flicker value corresponding to 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 obtain the actual measured correction common voltage. The predicted corrected common voltage of the module sample under the initial voltage increment condition; 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, obtaining the difference corresponding to each liquid crystal display module sample, and averaging the difference corresponding to each liquid crystal display module sample to obtain the average deviation value of each liquid crystal display module under the initial voltage increment condition; increasing the numerical value of the initial voltage increment, and repeatedly obtaining the average deviation value of each liquid crystal display module under the initial voltage increment condition, taking the minimum value of each average deviation value as the minimum average deviation value; taking the minimum average deviation value as the voltage compensation value.

[0033] A computer device comprises a memory and a processor, wherein the memory stores a computer program and the processor implements any of the above-mentioned methods for determining a common voltage of a liquid crystal display panel when executing the program.

[0034] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements any of the above-mentioned methods for determining a common voltage of a liquid crystal display panel.

[0035] The above-mentioned method, device, computer equipment and storage medium for determining the common voltage of the liquid crystal display panel first obtain the range of the common voltage corresponding to the liquid crystal display panel to be tested, and the range of the common voltage is between the first minimum value and the first maximum value; according to the first maximum value and the first minimum value, obtain the second maximum value and the second minimum value, the first maximum value is greater than the second maximum value, and the first minimum value is less than the second minimum value; the common voltage of the liquid crystal display panel to be tested is respectively set to the first maximum value, the second maximum value, the second minimum value and the first minimum value, and respectively obtain the first flicker value corresponding to the first maximum value, the second flicker value corresponding to the second maximum value, the third flicker value corresponding to the second minimum value, and the fourth flicker value corresponding to the first minimum value; according to the first maximum value, the second maximum value, the second minimum value, the first minimum value, the first flicker value, the second flicker value, the third flicker value, and the fourth flicker value, obtain the corrected common voltage of the liquid crystal display panel to be tested. Therefore, while reducing the number of measurements and measurement time of the liquid crystal display panel, the corrected common voltage can be obtained by the method for determining the common voltage of the liquid crystal display panel, thereby improving the production efficiency of the liquid crystal display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic flow chart of a method for determining a common voltage of a liquid crystal display panel in one embodiment;

[0037] Figure 2 It is a curve relationship diagram of the common voltage and flicker value of the liquid crystal display module sample;

[0038] Figure 3 A schematic diagram of the principle of generating flicker values ​​of a liquid crystal display panel;

[0039] Figure 4 is a flow chart of a method for determining the interval voltage of a liquid crystal display panel in one embodiment;

[0040] Figure 5 It is a schematic diagram of a process of obtaining a correction common voltage of a liquid crystal display panel to be tested in one embodiment;

[0041] Figure 6 It is a schematic diagram of a flow chart of obtaining a linear relationship function between a common voltage and a flicker value in one embodiment;

[0042] Figure 7 is a flow chart of a method for determining a voltage compensation value of a liquid crystal display panel in another embodiment;

[0043] Figure 8 is a structural block diagram of a common voltage determination device for a liquid crystal display panel in one embodiment;

[0044] Fig. 9is a structural block diagram of a common voltage determination device for a liquid crystal display panel in another embodiment;

[0045] Fig.10 is a structural block diagram of a common voltage determination device for a liquid crystal display panel in another embodiment;

[0046] Fig.11 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0048] In one embodiment, Figure 1 As shown, a method for determining a common voltage of a liquid crystal display panel is provided, comprising the following steps:

[0049] Step 102 , obtaining a range of a common voltage corresponding to the liquid crystal display panel to be tested, where the range of the common voltage is between a first minimum value and a first maximum value.

[0050] The range of the common voltage of the liquid crystal display panel refers to the range in which the flicker value of the liquid crystal display panel decreases as the common voltage increases. When the common voltage increases to a specific value and then continues to increase, the flicker value of the liquid crystal display panel increases as the common voltage increases, which is equivalent to two linear straight lines, such as Figure 2 As shown, the horizontal axis coordinate is VCOM (common voltage), the voltage value is expressed in hexadecimal, and the vertical axis coordinate is flicker (flicker value), wherein the common voltage ranges from 90 to B0, when the common voltage is between 90 and A2, the flicker value decreases as the common voltage increases, and when the common voltage increases to A2 value in the figure, the flicker value increases as the common voltage increases. The largest common voltage in the common voltage range of the liquid crystal display panel is the first maximum value, and the smallest common voltage is the first minimum value.

[0051] Specifically, the processor obtains a voltage range of a common voltage of the liquid crystal display panel to be tested, and determines a first maximum value and a first minimum value of the common voltage according to the voltage range of the common voltage.

[0052] Step 104: Obtain 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.

[0053] Among them, the second maximum value is on the maximum value side of the common voltage range, and the second minimum value is on the minimum value side of the common voltage range, that is, the second maximum value is greater than the second minimum value, that is, the relationship from large to small is the first maximum value, the second maximum value, the second minimum value, and the first minimum value.

[0054] Step 106, setting the common voltage of the liquid crystal display panel to be tested to the first maximum value, the second maximum value, the second minimum value and the first minimum value, respectively, and obtaining the first flicker value corresponding to the first maximum value, the second flicker value corresponding to the second maximum value, the third flicker value corresponding to the second minimum value, and the fourth flicker value corresponding to the first minimum value, respectively.

[0055] The flicker value represents the parameter fluctuation depth of the flicker intensity of the light source, and can also be represented by a flicker index or flicker percentage. Figure 3 As shown in FIG. 1 , the figure is a schematic diagram of the principle of generating the flicker value of the liquid crystal display panel, wherein the liquid crystal adopts an AC drive method (i.e., a positive voltage drive is adopted in the Nth frame, and a negative voltage drive is adopted in the N+1th frame) to control the rotation angle of the liquid crystal, and the rotation angle of the liquid crystal will affect the transmittance of the backlight source, thereby affecting the brightness of the liquid crystal display panel. Since the gate voltage (gate voltage) of each frame will have a high positive and negative voltage change, this change is coupled to the liquid crystal drive voltage through parasitic capacitance, causing the originally symmetrical positive and negative drive voltages to shift in the negative voltage direction, thereby causing the positive voltage driving the liquid crystal to be too small and the negative voltage to be too large. At this time, the rotation angle of the liquid crystal under the positive voltage and the negative voltage will be inconsistent, resulting in the flicker of the liquid crystal display panel. The flicker value of the liquid crystal display panel can be measured by the MSE (Moduloc System Engineering) optical lens.

[0056] Specifically, the processor sets the common voltage of the liquid crystal display panel to be tested to the first maximum value, the second maximum value, the second minimum value and the first minimum value, respectively, and measures the first maximum value, the second maximum value, the second minimum value and the first minimum value according to the optical device to obtain corresponding flicker values. For example, the processor sets the common voltage of the liquid crystal display panel to be tested to the first maximum value, the second maximum value, the second minimum value and the first minimum value, respectively, and measures the first flicker value corresponding to the first maximum value of the common voltage according to the MSE optical lens, measures the second flicker value corresponding to the second maximum value of the common voltage according to the MSE optical lens, measures the third flicker value corresponding to the second minimum value of the common voltage according to the MSE optical lens, and measures the fourth flicker value corresponding to the first minimum value of the common voltage according to the MSE optical lens.

[0057] Step 108 , obtaining a calibrated common voltage of the liquid crystal display panel to be tested according to the first maximum value, the second maximum value, the second minimum value, the first minimum value, the first flicker value, the second flicker value, the third flicker value, and the fourth flicker value.

[0058] Among them, the correction common voltage of the liquid crystal display panel to be tested is obtained by the 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 the smallest. The flicker value meets the required specifications of the product. The required specifications of the product are to ensure that the flicker value is within 10%.

[0059] Specifically, the first maximum value, the second maximum value, the second minimum value, the first minimum value, the first flicker value, the second flicker value, the third flicker value, and the fourth flicker value of the common voltage are input into the software of the lighting module to calculate and obtain the corrected common voltage of the liquid crystal display panel to be tested, and the flicker value corresponding to the corrected common voltage is the smallest.

[0060] In the above-mentioned 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 tested is obtained, and the range of the common voltage is between the first minimum value and the first maximum value; according to the first maximum value and the first minimum value, the second maximum value and the second minimum value are obtained, and the first maximum value is greater than the second maximum value, and the first minimum value is less than the second minimum value; the common voltage of the liquid crystal display panel to be tested is respectively set to the first maximum value, the second maximum value, the second minimum value and the first minimum value, and the first flicker value corresponding to the first maximum value, the second flicker value corresponding to the second maximum value, the third flicker value corresponding to the second minimum value, and the fourth flicker value corresponding to the first minimum value are respectively obtained; according to the first maximum value, the second maximum value, the second minimum value, the first minimum value, the first flicker value, the second flicker value, the third flicker value, and the fourth flicker value, the corrected common voltage of the liquid crystal display panel to be tested is obtained. Therefore, while reducing the number of measurements and the measurement time of the liquid crystal display panel, the corrected common voltage can be obtained by the method for determining the common voltage of the liquid crystal display panel, thereby improving the production efficiency of the liquid crystal display panel.

[0061] In an optional embodiment, according to the first maximum value and the first minimum value, a second maximum value and a second minimum value are obtained, including: 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. Wherein, the interval voltage is obtained by measuring a sample of a liquid crystal display module of the same model. Therefore, the second maximum value and the second minimum value are determined by the interval voltage, so that the corresponding flicker values ​​are measured according to the first maximum value, the second maximum value, the second minimum value, and the first minimum value, respectively, and then the correction common voltage is obtained, that is, after setting the interval voltage, the correction common voltage can be obtained by measuring the flicker value four times, and the number of times and the measurement time of the liquid crystal display panel are measured are reduced, thereby improving the production efficiency of the liquid crystal display panel.

[0062] Above Figure 1 The embodiment of the present invention describes a scheme for determining the common voltage of the liquid crystal display panel according to the first maximum value, the second maximum value, the second minimum value and the first minimum value of the common voltage. Figure 1 Based on the embodiment shown, a possible implementation method for determining the interval voltage is provided, such as Figure 4 As shown, the method for determining the interval voltage includes the following steps:

[0063] Step 402 , 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 using a common voltage corresponding to each minimum flicker value as a measured correction common voltage.

[0064] Among them, in order to solve the problem of flicker value of the liquid crystal display panel, the positive and negative voltages driving the liquid crystal are made symmetrical by correcting the common voltage, and the common voltage is adjusted by a register in the Drive IC (Drive Integrated Circuit). Since the adjustable range of the register value is very large, for example, between 0 and -2V, a common voltage range is found through multiple liquid crystal display module samples. The flicker value in this range changes linearly with the common voltage. Then, the algorithm is used to find the corrected common voltage in this range, and the flicker value corresponding to the corrected common voltage is the smallest.

[0065] Specifically, by setting different voltage values ​​for the common voltages of multiple liquid crystal display module samples of the same product model, flicker value measurement is performed, and the flicker value of each liquid crystal display module sample is measured, and the minimum flicker value of each liquid crystal display module sample can be obtained according to the flicker value, and the common voltage corresponding to each minimum flicker value is used as the measured corrected common voltage, wherein the common voltage range can be obtained through the liquid crystal display module sample data, that is, the flicker value and the common voltage within this range are linearly related, and the flicker value of each liquid crystal display module sample corresponds to a measured corrected common voltage. For example, the common voltage is set for 20 liquid crystal display module samples of the same product model, and because the common voltage range is in the negative value range, it can be adjusted from 0 to -0.5V, with a voltage step of 0.01V, and the flicker values ​​of 20 groups of samples are measured respectively, and each group of flicker values ​​corresponds to a minimum flicker value, and the minimum flicker value is within 10%, and the common voltage corresponding to the minimum flicker value is the measured corrected common voltage, and 20 measured corrected common voltages are measured.

[0066] Step 404, 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.

[0067] The common voltage range is obtained by measuring a plurality of liquid crystal display module sample data, for example, the common voltage range is between -0.1V and -0.2V. In actual use, because the common voltage range is in the negative range, the common voltage is usually compared by the absolute value of the common voltage, that is, the first maximum value of the common voltage is -0.2V, the first minimum value is -0.1V, the initial second maximum value and the initial second minimum value are within the common voltage range, wherein the initial voltage increment can be 0.01V.

[0068] Specifically, the first maximum value and the first minimum value of the common voltage are determined according to the range of the common voltage. The initial second maximum value is obtained by subtracting the initial power increment from the maximum value, and the initial second minimum value is obtained by adding the initial voltage increment to the first minimum value. For example, if the common voltage range is -0.1V to -0.2V and the initial voltage increment is 0.01V, then the initial second maximum value is -0.19V and the initial second minimum value is -0.11V.

[0069] Step 406, measuring the flicker value corresponding to 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 corrected common voltage of each liquid crystal display module sample under the initial voltage increment condition.

[0070] Specifically, by setting the common voltages of multiple liquid crystal display module samples to the first maximum value, the initial first maximum value, the first minimum value, and the initial first minimum value to measure the flicker value, the flicker value of each sample can be measured through the MSE optical lens, and each liquid crystal display module sample obtains a predicted corrected common voltage based on the first maximum value, the initial first maximum value, the first minimum value, the initial first minimum value, and the flicker value. For example, the flicker values ​​of 20 liquid crystal display module samples are measured when the common voltages are -0.2V, -0.19V, -0.11V, and -0.1V, respectively, and the predicted corrected common voltage of each sample when the initial voltage increment is 0.01V is obtained based on the common voltages of the flicker values ​​of each sample -0.2V, -0.19V, -0.11V, and -0.1V, that is, 20 predicted corrected common voltages are obtained.

[0071] Step 408, compare the measured corrected common voltage corresponding to each LCD module sample with the predicted corrected common voltage corresponding to each LCD module sample, obtain the difference corresponding to each LCD module sample, and average the difference corresponding to each LCD module sample to obtain the average deviation value of each LCD module under the initial voltage increment condition.

[0072] Specifically, the measured corrected common voltage of each liquid crystal display module sample is compared with the predicted corrected common voltage of the module sample, for example, by comparison through subtraction operation, to obtain a difference value equal to the number of liquid crystal display modules, and then the difference values ​​equal to the number of liquid crystal display module samples are averaged to obtain an average deviation value at the initial voltage increment. For example, when the number of liquid crystal display module samples is 20, the measured corrected common voltage of each sample is subtracted from the predicted corrected common voltage of the sample to obtain the difference value of the sample, and then 20 differences are obtained, and the 20 differences are numerically averaged to obtain the average deviation value at the initial voltage increment.

[0073] Step 410 , by increasing the value of the initial voltage increment, and repeatedly obtaining the average deviation value of each liquid crystal display module under the initial voltage increment condition, the minimum value of each average deviation value is used as the minimum average deviation value.

[0074] The voltage increment each time is the initial voltage increment. For example, when the initial voltage increment is 0.01V, the voltage increment for the second time is 0.02V, and the voltage increment for the nth time is 0.01V×n.

[0075] Specifically, after each increase in the numerical value of the initial voltage increment, the average deviation value of multiple liquid crystal display module samples of the same product model is obtained, and the minimum average deviation value is obtained by comparing the average deviation values ​​at different voltage increments. The minimum average deviation value can be zero, and the number of the average deviation values ​​is the same as the number of times the voltage increment is increased.

[0076] Step 412: Using the initial voltage increment corresponding to the minimum average deviation value as the interval voltage.

[0077] Specifically, when actually measuring the liquid crystal display module sample to be tested, the voltage increment corresponding to the minimum average deviation value is used as the interval voltage to test the liquid crystal display module sample to be tested.

[0078] In this embodiment, a common voltage range and interval voltage are obtained when actually testing the liquid crystal display module to be tested by testing multiple samples of the same product model, so that when actually testing the liquid crystal display module to be tested, it is only necessary to test the flicker value at the first maximum value, the second maximum value, the second minimum value, and the first minimum value of the common voltage to obtain the corrected common voltage. After obtaining the corrected common voltage, the flicker value of the module to be tested under the corrected common voltage is measured. If the flicker value is within 10%, if the flicker value is greater than 10%, it is determined that the liquid crystal display module does not meet the requirements and is a defective product. Therefore, the determination method of the interval voltage reduces the number of liquid crystal display measurements and the measurement time, and improves the production efficiency of the liquid crystal display panel.

[0079] In one embodiment, obtaining the corrected common voltage of the liquid crystal display panel to be tested according to the first maximum value, the second maximum value, the second minimum value, the first minimum value, the first flicker value, the second flicker value, the third flicker value, and the fourth flicker value includes:

[0080] A linear relationship function between the common voltage and the flicker value is fitted according to the first maximum value, the second maximum value, the second minimum value, the first minimum value, the first flicker value, the second flicker value, the third flicker value, and the fourth flicker value, and a corrected common voltage of the liquid crystal display panel to be tested is determined according to the linear relationship function.

[0081] Among them, within the common voltage range, the flicker value is linearly related to the common voltage.

[0082] Specifically, a linear relationship function between the common voltage and the flicker value is obtained by fitting the first maximum value, the second maximum value, the second minimum value, the first minimum value, the first flicker value, the second flicker value, the third flicker value, and the fourth flicker value of the common voltage in a common voltage range. The corrected common voltage of the liquid crystal display panel to be tested is determined according to the linear relationship function and algorithm calculation.

[0083] In this embodiment, after four flicker value measurements, a linear relationship function between the common voltage and the flicker value is obtained according to the first maximum value, the second maximum value, the second minimum value, the first 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, the time consumed for measuring the corrected common voltage is shortened by 3 seconds compared to the time consumed for measuring by the binary method, thereby improving production efficiency and reducing the production cost of the module.

[0084] In one embodiment, Figure 5 As shown, a linear relationship function between the common voltage and the flicker value is obtained by fitting according to the first maximum value, the second maximum value, the first minimum 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 a correction common voltage of the liquid crystal display panel to be tested is determined according to the linear relationship function, including:

[0085] Step 502 , obtaining a first linear function of a common voltage and a flicker value by fitting according to the first maximum value, the second maximum value, the first flicker value, and the second flicker value.

[0086] Specifically, the slope and 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, let the first linear function expression be: y=k1*x+b, k1 and b are the slope and intercept of the first linear function respectively, then:

[0087] k1=(flicker2-flicker1) / (Vmax-d-Vmax)

[0088] b=flcker1-k1*Vmax

[0089] Please refer to Figure 6 As shown, straight line 1 in the figure is the first linear function.

[0090] Step 504 , obtaining a second linear function of the common voltage and the flicker value by fitting according to the second minimum value, the first minimum value, the third flicker value, and the fourth flicker value.

[0091] Specifically, the slope and 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, let the first minimum value be Vmin, the corresponding third flicker value be flicker3, and the fourth flicker value be flicker4, let the second linear function expression be: y=k2*x+c, k2 and c are the slope and intercept of the second linear function respectively, then:

[0092] k2=(flicker3-flicker4) / (Vmin+d-Vmin)

[0093] c=flcker4-k2*Vmin

[0094] Please refer to Figure 6 As shown, straight line 2 in the figure is the second linear function.

[0095] Step 506 : determining a correction common voltage of the liquid crystal display panel to be tested according to a common voltage corresponding to the intersection point between the first linear function and the second linear function.

[0096] Specifically, the intersection between the first linear function and the second linear function is calculated by the software of the lighting module, and the correction common voltage of the liquid crystal display panel to be tested is determined according to the intersection. For example, the lighting module software can determine the intersection by obtaining that the first linear function is equal to the second linear function, that is, when k1*x+b=k2*x+c:

[0097]

[0098] When the voltage compensation value is not zero, the calculated x0 is the corrected common voltage value.

[0099] In this embodiment, after four flicker value measurements, the first linear function is first determined according to the first maximum value, the second maximum value, the first flicker value, and the second flicker value, and the second linear function of the common voltage and the flicker value is fitted according to the second minimum value, the first minimum value, the third flicker value, and the fourth flicker value, and then the corrected common voltage is determined according to the first linear function and the second linear function. Therefore, the time consumed in measuring the corrected common voltage is shortened by 3 seconds compared to the time consumed in the measurement using the binary method, thereby improving production efficiency and reducing the production cost of the module.

[0100] In one embodiment, the correction common voltage is composed of the common voltage plus the voltage compensation value. Specifically, when the minimum average deviation value obtained by comparing the average deviation value is zero, that is, the voltage compensation value is zero, then the common voltage corresponding to the intersection between the first linear function and the second linear function is used as the correction common voltage; when the minimum average deviation value obtained by comparing the average deviation value is not zero, that is, the voltage compensation value is zero, the minimum average deviation value is used as the voltage compensation value, and then the first common voltage is added to the voltage compensation value to obtain the correction common voltage of the liquid crystal display panel to be tested. In this embodiment, the voltage compensation value is used to make the obtained correction common voltage close to the actual correction common voltage of the module, and then the flicker value corresponding to the correction common voltage is measured to see whether it is within the required specifications of the product (for example, whether the flicker value is within 10%), so as to optimize the correction common voltage value, and the correction common voltage can be obtained by measuring the correction common voltage, which shortens the value-seeking time by more than half compared with the traversal method and the binary method.

[0101] In one embodiment, Figure 7 As shown, a method for determining the voltage compensation value is provided, comprising the following steps:

[0102] Step 702 , 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 using a common voltage corresponding to each minimum flicker value as a measured correction common voltage.

[0103] Step 704, 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.

[0104] Step 706, measuring the flicker value corresponding to 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 corrected common voltage of each liquid crystal display module sample under the initial voltage increment condition.

[0105] Step 708, compare the measured corrected common voltage corresponding to each LCD module sample with the predicted corrected common voltage corresponding to each LCD module sample, obtain the difference corresponding to each LCD module sample, and average the difference corresponding to each LCD module sample to obtain the average deviation value of each LCD module under the initial voltage increment condition.

[0106] Step 710, increasing the value of the initial voltage increment and repeatedly obtaining the average deviation value of each liquid crystal display module under the initial voltage increment condition, and taking the minimum value of each average deviation value as the minimum average deviation value.

[0107] The number of the average deviation values ​​is the same as the number of times the voltage increment is increased, and each increased voltage increment is the 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. However, when the voltage increment increases to a certain value, the curve passing through the first maximum value, the second maximum value, the first flicker value, and the second flicker value will shift to the left, resulting in distortion. Therefore, when the voltage increment increases to the maximum, when the corresponding average deviation values ​​at different voltage increments are not zero, that is, the minimum average deviation value is not zero, it is necessary to compensate the minimum average deviation value through the voltage compensation value, so that the flicker value corresponding to the correction common voltage is minimized and meets the required specifications.

[0108] Step 712: Use the minimum average deviation value as a voltage compensation value.

[0109] 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.

[0110] In the present embodiment, a plurality of liquid crystal display module samples of the same product model are tested to obtain the common voltage range and interval voltage when actually testing the liquid crystal display module to be tested. When the minimum average deviation value obtained by comparing the average deviation values ​​is not zero, the minimum average deviation value needs to be used as a voltage compensation value. By increasing the voltage compensation value, the obtained corrected common voltage is made close to the actual corrected common voltage of the module. Then, the flicker value corresponding to the corrected common voltage is measured to see whether it is within the required specifications of the product (for example, whether the flicker value is within 10%). In this way, the corrected common voltage value is optimized. Moreover, the corrected common voltage can be obtained by measuring the corrected common voltage. Compared with the traversal method and the binary search method, the value search time is shortened by more than half.

[0111] It should be understood that although Figure 1 , Figure 4-5 , Figure 7 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 1 , Figure 4-5 , Figure 7At least part of the steps may include multiple steps or multiple stages. These steps or stages are not necessarily performed at the same time, but can be performed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed in turn or alternately with other steps or at least part of the steps or stages in other steps.

[0112] In one embodiment, Figure 8 As shown, a common voltage determination device for a liquid crystal display panel is provided, the device 800 comprises: an acquisition module 802, a first acquisition module 804, a second acquisition module 806 and a third acquisition module 808, wherein:

[0113] The acquisition module 802 is used to acquire a range of a common voltage corresponding to the liquid crystal display panel to be tested, where the range of the common voltage is between a first minimum value and a first maximum value.

[0114] The first obtaining module 804 is used to obtain 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.

[0115] The second acquisition module 806 is used to set the common voltage of the liquid crystal display panel to be tested to the first maximum value, the second maximum value, the second minimum value and the first minimum value, and respectively obtain the first flicker value corresponding to the first maximum value, the second flicker value corresponding to the second maximum value, the third flicker value corresponding to the second minimum value, and the fourth flicker value corresponding to the first minimum value.

[0116] The third obtaining module 808 is used to obtain the corrected common voltage of the liquid crystal display panel to be tested according to the first maximum value, the second maximum value, the second minimum value, the first minimum value, the first flicker value, the second flicker value, the third flicker value, and the fourth flicker value.

[0117] In one embodiment, the first obtaining module 804 is specifically configured to obtain the second maximum value by subtracting the interval voltage from the first maximum value, and obtain the second minimum value by adding the interval voltage to the first minimum value.

[0118] In one embodiment, Fig. 9 As shown, the device 800 further includes an interval voltage determination module 810, wherein:

[0119] The interval voltage determination module 810 is used to measure the flicker value of multiple liquid crystal display module samples respectively to obtain the minimum flicker value corresponding to each liquid crystal display module sample, and use the common voltage corresponding to each minimum flicker value as the measured correction common voltage; subtract the initial voltage increment from the first maximum value to obtain the initial first maximum value, and add the initial voltage increment to the first minimum value to obtain the initial first minimum value; wherein the initial first maximum value and the initial first minimum value are within the range of the common voltage; measure the flicker value corresponding to 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 obtain the actual measured correction common voltage of each liquid crystal display module sample. The predicted corrected common voltage of each liquid crystal display module sample under the condition of the initial voltage increment is obtained; the measured corrected common voltage corresponding to each liquid crystal display module sample is compared with the predicted corrected common voltage corresponding to each liquid crystal display module sample to obtain the difference corresponding to each liquid crystal display module sample, and the difference corresponding to each liquid crystal display module sample is averaged to obtain the average deviation value of each liquid crystal display module under the condition of the initial voltage increment; by increasing the numerical value of the initial voltage increment, and repeatedly obtaining the average deviation value of each liquid crystal display module under the condition of the initial voltage increment, the minimum value of each average deviation value is used as the minimum average deviation value; the initial voltage increment corresponding to the minimum average deviation value is used as the interval voltage.

[0120] In one embodiment, the third acquisition module 808 is also used to fit a linear relationship function between the common voltage and the flicker value according to the first maximum value, the second maximum value, the second minimum value, the first 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 relationship function.

[0121] In one embodiment, the third acquisition module 808 is also used to fit 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; to fit a second linear function of the common voltage and the flicker value according to the second minimum value, the first minimum value, the third flicker value and the fourth flicker value; and to determine the corrected common voltage of the liquid crystal display panel to be tested according to the common voltage corresponding to the intersection of the first linear function and the second linear function.

[0122] In one embodiment, the corrected common voltage is formed by adding the common voltage to a voltage compensation value.

[0123] In one embodiment, Fig.10 As shown, the device 800 also includes a voltage compensation value determination module 814, wherein:

[0124] The voltage compensation value determination module 814 is used to measure the flicker value of multiple liquid crystal display module samples respectively to obtain the minimum flicker value corresponding to each liquid crystal display module sample, and use the common voltage corresponding to each minimum flicker value as the actual measured correction common voltage; subtract the initial voltage increment from the first maximum value to obtain the initial first maximum value, and add the initial voltage increment to the first minimum value to obtain the initial first minimum value, wherein the initial first maximum value and the initial first minimum value are within the range of the common voltage; measure the flicker value corresponding to 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 obtain the actual measured correction common voltage. The predicted corrected common voltage of the module samples under the initial voltage increment condition is shown; the actually measured corrected common voltage corresponding to each liquid crystal display module sample is compared with the predicted corrected common voltage corresponding to each liquid crystal display module sample to obtain the difference corresponding to each liquid crystal display module sample, and the difference corresponding to each liquid crystal display module sample is averaged to obtain the average deviation value of each liquid crystal display module under the initial voltage increment condition; by increasing the numerical value of the initial voltage increment and repeatedly obtaining the average deviation value of each liquid crystal display module under the initial voltage increment condition, the minimum value of each average deviation value is taken as the minimum average deviation value; the minimum average deviation value is taken as the voltage compensation value.

[0125] For the specific definition of the common voltage determination device of the liquid crystal display panel, please refer to the definition of the common voltage determination method of the liquid crystal display panel above, which will not be repeated here. Each module in the common voltage determination device of the liquid crystal display panel can be implemented in whole or in part by software, hardware and a combination thereof. The above modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0126] In one embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as follows: Fig.11 As shown. The computer device includes a processor, a memory and a network interface connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile 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 the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store common voltage determination data of a liquid crystal display panel. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for determining a common voltage of a liquid crystal display panel is implemented.

[0127] Those skilled in the art will understand that Fig.11 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0128] In one embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above-mentioned method embodiments when executing the computer program.

[0129] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0130] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory or optical memory, etc. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0131] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0132] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A method for determining a common voltage of a liquid crystal display panel, characterized in that: The method comprises: Acquire a range of a common voltage corresponding to the liquid crystal display panel to be tested, wherein the range of the common voltage is between a first minimum value and a first maximum value, wherein within the range of the common voltage, the flicker value changes linearly with the common voltage; Subtracting the interval voltage from the first maximum value to obtain a second maximum value, and adding the interval voltage to the first minimum value to obtain a second minimum value; The common voltage of the liquid crystal display panel to be tested is respectively set to the first maximum value, the second maximum value, the second minimum value and the first minimum value, and 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 are respectively obtained; Obtaining a corrected common voltage of the liquid crystal display panel to be tested according to the first maximum value, the second maximum value, the second minimum value, the first minimum value, the first flicker value, the second flicker value, the third flicker value, and the fourth flicker value; Among them, a common voltage range and interval voltage when actually testing the liquid crystal display module to be tested are obtained by testing multiple liquid crystal display module samples of the same product model, wherein the interval voltage is obtained in the following manner: flicker values ​​of multiple liquid crystal display module samples are measured respectively to obtain the minimum flicker value corresponding to each liquid crystal display module sample, and the common voltage corresponding to each minimum flicker value is used as the measured corrected common voltage; the first maximum value is subtracted from the initial voltage increment to obtain the initial first maximum value, and the first minimum value is added to the initial voltage increment to obtain the initial first minimum value; wherein the initial first maximum value and the initial first minimum value are within the range of the common voltage; the common voltage of each liquid crystal display module sample is measured within the first maximum value, the initial first maximum value, the first minimum value, and the interval voltage. value, the flicker value corresponding to the initial first minimum value condition, and obtain the predicted corrected common voltage of each LCD display module sample under the initial voltage increment condition; compare the measured corrected common voltage corresponding to each LCD display module sample with the predicted corrected common voltage corresponding to each LCD display module sample, obtain the difference value corresponding to each LCD display module sample, and average the difference value corresponding to each LCD display module sample to obtain the average deviation value of each LCD display module under the initial voltage increment condition; by increasing the numerical value of the initial voltage increment, and repeatedly obtaining the average deviation value of each LCD display module under the initial voltage increment condition, the minimum value of each average deviation value is used as the minimum average deviation value; the initial voltage increment corresponding to the minimum average deviation value is used as the interval voltage.

2. The method according to claim 1, characterized in that: The method of obtaining the corrected common voltage of the liquid crystal display panel to be tested according to the first maximum value, the second maximum value, the second minimum value, the first minimum value, the first flicker value, the second flicker value, the third flicker value, and the fourth flicker value comprises: A linear relationship function between the common voltage and the flicker value is fitted according to the first maximum value, the second maximum value, the second minimum value, the first minimum value, the first flicker value, the second flicker value, the third flicker value, and the fourth flicker value, and a corrected common voltage of the liquid crystal display panel to be tested is determined according to the linear relationship function.

3. The method according to claim 2, characterized in that The method of fitting a linear relationship function between a common voltage and a flicker value according to the first maximum value, the second maximum value, the second minimum value, the first minimum value, the first flicker value, the second flicker value, the third flicker value, and the fourth flicker value, and determining a corrected common voltage of the liquid crystal display panel to be tested according to the linear relationship function includes: A first linear function of a common voltage and a flicker value is obtained by fitting according to the first maximum value, the second maximum value, the first flicker value, and the 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; The correction common voltage of the liquid crystal display panel to be tested is determined according to the common voltage corresponding to the intersection point between the first linear function and the second linear function.

4. The method according to claim 3, characterized in that The corrected common voltage is formed by adding the common voltage to a voltage compensation value.

5. The method according to claim 4, characterized in that The voltage compensation value is obtained by: 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 using a common voltage corresponding to each of the minimum flicker values ​​as a measured correction common voltage; Subtracting an 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; Measure the flicker value corresponding to 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 obtain the predicted corrected common voltage of each liquid crystal display module sample under the condition of the initial voltage increment; Comparing the 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 the difference value corresponding to each liquid crystal display module sample, and averaging the difference value corresponding to each liquid crystal display module sample to obtain the average deviation value of each liquid crystal display module under the initial voltage increment condition; By increasing the value of the initial voltage increment, and repeatedly obtaining the average deviation value of each liquid crystal display module under the initial voltage increment condition, the minimum value of each average deviation value is used as the minimum average deviation value; The minimum average deviation value is used as the voltage compensation value.

6. A common voltage determination device for a liquid crystal display panel, characterized in that: The device comprises: An acquisition module, used for acquiring a range of a common voltage corresponding to the liquid crystal display panel to be tested, wherein the range of the common voltage is between a first minimum value and a first maximum value, wherein within the range of the common voltage, the flicker value changes linearly with the common voltage; A first obtaining module, configured to obtain a second maximum value by subtracting an interval voltage from the first maximum value, and obtain a second minimum value by adding the interval voltage to the first minimum value; a second obtaining module, used for setting the common voltage of the liquid crystal display panel to be tested to the first maximum value, the second maximum value, the second minimum value and the first minimum value, respectively, and 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, respectively; a third obtaining module, configured to obtain a corrected common voltage of the liquid crystal display panel to be tested according to the first maximum value, the second maximum value, the second minimum value, the first minimum value, the first flicker value, the second flicker value, the third flicker value, and the fourth flicker value; Among them, the common voltage range and interval voltage when actually testing the liquid crystal display module to be tested are obtained by testing multiple liquid crystal display module samples of the same product model. The device also includes an interval voltage determination module, which is used to measure the flicker value of multiple liquid crystal display module samples respectively to obtain the minimum flicker value corresponding to each liquid crystal display module sample, and use the common voltage corresponding to each minimum flicker value as the measured correction common voltage; subtract the initial voltage increment from the first maximum value to obtain the initial first maximum value, and add the initial voltage increment to the first minimum value to obtain the initial first minimum value; wherein the initial first maximum value and the initial first minimum value are within the range of the common voltage; measure the common voltage of each liquid crystal display module sample within the first maximum value, the initial first maximum value, and the first minimum value. , the flicker value corresponding to the initial first minimum value condition, and obtain the predicted corrected common voltage of each LCD display module sample under the initial voltage increment condition; compare the measured corrected common voltage corresponding to each LCD display module sample with the predicted corrected common voltage corresponding to each LCD display module sample, obtain the difference value corresponding to each LCD display module sample, and average the difference value corresponding to each LCD display module sample to obtain the average deviation value of each LCD display module under the initial voltage increment condition; by increasing the numerical value of the initial voltage increment, and repeatedly obtaining the average deviation value of each LCD display module under the initial voltage increment condition, the minimum value of each average deviation value is used as the minimum average deviation value; the initial voltage increment corresponding to the minimum average deviation value is used as the interval voltage.

7. The device according to claim 6, characterized in that The third acquisition module is also used to fit a linear relationship function between the common voltage and the flicker value according to the first maximum value, the second maximum value, the second minimum value, the first 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 relationship function.

8. The device according to claim 7, characterized in that The third obtaining module is further used for fitting a first linear function of a common voltage and a flicker value according to the first maximum value, the second maximum value, the first flicker value and the second flicker value; A second linear function of common voltage and flicker value is fitted according to the second minimum value, the first minimum value, the third flicker value and the fourth flicker value; and a corrected common voltage of the liquid crystal display panel to be tested is determined according to the common voltage corresponding to the intersection of the first linear function and the second linear function.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the method according to any one of claims 1 to 5 is implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

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