CN116504160B - Method, device, equipment and storage medium for evaluating liquid crystal panel flex electric effect - Google Patents

Abstract

The invention provides a method, a device, equipment and a storage medium for evaluating the flexoelectric effect of a liquid crystal panel, which are characterized in that through providing working voltage for the liquid crystal panel, different gray-scale images can be normally displayed, a switch of a TFT of the liquid crystal panel is turned on, driving signals required for measuring transmittance are provided for a Data signal line, screen brightness Data of the liquid crystal panel are obtained, a voltage versus transmittance curve is drawn according to the screen brightness Data, a transmittance sequence to be measured is selected from the voltage versus transmittance curve, corresponding flicker waveform Data under each transmittance in the transmittance sequence is measured, finally the flicker waveform Data is analyzed to evaluate the intensity of the flexoelectric effect, and compared with the traditional method for measuring the flexoelectric coefficient, the measuring difficulty is lower, the measuring result is more visual, and the influence of the flexoelectric effect on the display effect of the liquid crystal panel can be evaluated more accurately.

Description

Liquid crystal panel flexoelectric effect evaluation method, device, equipment and storage medium

Technical Field

The present invention relates to the technical field of liquid crystal panels, and in particular to a method, device, equipment and storage medium for evaluating the flexoelectric effect of a liquid crystal panel.

Background Art

The working principle of the liquid crystal panel is: under the action of the electric field, the arrangement direction of the liquid crystal molecules changes, so that the light source that transmits the liquid crystal panel changes (modulates), completing the electro-optical conversion. The liquid crystal molecules are affected by the electric field and deformed to bend and bend, and this effect is called the flexoelectric effect. The display effect of the liquid crystal panel will be affected to a certain extent by the flexoelectric effect, so the study of the flexoelectric effect is one of the important contents in the field of liquid crystal panels today.

The flexoelectric effect of liquid crystal molecules is generally characterized by the flexoelectric coefficients of flexure and bending (e1, e3). The traditional method of measuring the flexoelectric coefficient is usually the optical path difference measurement and the mixed arrangement test box measurement. For the traditional method of measuring the flexoelectric coefficient, on the one hand, the measurement system is relatively complex, and the flexoelectric coefficient of liquid crystal molecules is small, which makes the measurement difficult. On the other hand, the influence of the flexoelectric effect on the actual display effect in the liquid crystal panel is related to many factors such as electrode shape, electrode structure, and box thickness. The simple liquid crystal flexoelectric coefficient is difficult to intuitively use to evaluate its influence on the display effect of the liquid crystal panel.

Summary of the invention

The present invention provides a method, device, equipment and storage medium for evaluating the flexoelectric effect of a liquid crystal panel, so as to solve the problems in the prior art that the measurement system of the traditional method for measuring the flexoelectric coefficient is relatively complex, the measurement difficulty is high, and the simple liquid crystal flexoelectric coefficient is difficult to be used intuitively to evaluate its influence on the display effect of the liquid crystal panel, and realizes the use of a flicker measurement method to intuitively evaluate the influence of the flexoelectric effect on the display effect of the liquid crystal panel.

The present invention provides a method for evaluating the flexoelectric effect of a liquid crystal panel, comprising: providing a working voltage to the liquid crystal panel to be tested;

Turning on the switch of the TFT of the liquid crystal panel to provide the Data signal line of the liquid crystal panel with a driving signal required for measuring transmittance;

Acquiring screen brightness data of the liquid crystal panel, and drawing a voltage-to-transmittance curve of the liquid crystal panel according to the screen brightness data;

Selecting a transmittance sequence to be measured from the voltage versus transmittance curve, and measuring flicker waveform data corresponding to each transmittance in the transmittance sequence;

The flicker waveform data is analyzed to evaluate the strength of its flexoelectric effect.

According to a method for evaluating the flexoelectric effect of a liquid crystal panel provided by the present invention, the flicker waveform data is analyzed to evaluate the strength of the flexoelectric effect, specifically comprising:

Acquire frequency spectrum data corresponding to the flicker waveform data, and record the flicker intensity corresponding to a specific frequency in the frequency spectrum data;

A curve of the variation of the flicker intensity versus transmittance at the specific frequency is plotted, and the strength of the flexoelectric effect is evaluated by comparing the flicker intensity at each measuring point of the variation curve with the flicker intensity near the specific transmittance.

According to a method for evaluating the flexoelectric effect of a liquid crystal panel provided by the present invention, the specific frequency is twice the signal frequency of the driving signal.

According to a method for evaluating the flexoelectric effect of a liquid crystal panel provided by the present invention, the driving signal is a square wave driving signal with different amplitudes from low to high.

According to a method for evaluating the flexoelectric effect of a liquid crystal panel provided by the present invention, the frequency of the driving signal is half of the designed operating frequency of the liquid crystal panel.

According to a method for evaluating the flexoelectric effect of a liquid crystal panel provided by the present invention, fast Fourier transform is used to obtain the spectrum data corresponding to the flicker waveform.

The present invention also provides a device for evaluating the flexoelectric effect of a liquid crystal panel, comprising: a light receiving unit, a driving unit, a measurement and control unit, and a data processing unit;

The light receiving unit is used to measure the brightness data of the screen of the liquid crystal panel;

The driving unit is used to provide a working voltage for the liquid crystal panel to be tested, turn on the switch of the TFT of the liquid crystal panel, and provide a driving signal required for measuring the transmittance for the Data signal line of the liquid crystal panel;

The measurement and control unit is used to obtain the brightness data and send the brightness data to the data processing unit;

The data processing unit is used to obtain the screen brightness data of the liquid crystal panel, draw the voltage versus transmittance curve of the liquid crystal panel according to the screen brightness data, select the transmittance sequence to be measured from the voltage versus transmittance curve, measure the flicker waveform data corresponding to each transmittance in the transmittance sequence, analyze the flicker waveform data, and evaluate the strength of its flexoelectric effect.

According to a liquid crystal panel flexoelectric effect evaluation device provided by the present invention, the sampling rate of the measuring unit of the measurement and control unit is greater than 10 thousand times per second.

The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, a method for evaluating the flexoelectric effect of a liquid crystal panel as described in any one of the above is implemented.

The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements any of the above-described methods for evaluating the flexoelectric effect of a liquid crystal panel.

The present invention provides a method, device, equipment and storage medium for evaluating the flexoelectric effect of a liquid crystal panel. The method provides a working voltage for the liquid crystal panel to be tested so that the liquid crystal panel can normally display different grayscale images, turns on the switch of the TFT of the liquid crystal panel, provides a driving signal required for measuring the transmittance for the Data signal line of the liquid crystal panel, obtains the screen brightness data of the liquid crystal panel, draws a voltage-transmittance curve of the liquid crystal panel according to the screen brightness data, selects a transmittance sequence to be measured from the voltage-transmittance curve, measures the flicker waveform data corresponding to each transmittance in the transmittance sequence, and finally analyzes the flicker waveform data to evaluate the strength of its flexoelectric effect. The flicker measurement method is used to evaluate the influence of the flexoelectric effect on the display effect of the liquid crystal panel. Compared with the traditional method of measuring the flexoelectric coefficient, the measurement difficulty is lower and the measurement result is more intuitive, so the influence of the flexoelectric effect on the display effect of the liquid crystal panel can be more accurately evaluated.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

FIG1 is a schematic flow chart of a method for evaluating the flexoelectric effect of a liquid crystal panel provided by the present invention;

FIG2 is a schematic diagram of a simplified driving model of a liquid crystal panel in an embodiment of the present invention;

3 is a schematic diagram of a driving waveform used in voltage-transmittance measurement of a liquid crystal panel in an embodiment of the present invention;

FIG4 is a schematic diagram of a voltage-transmittance curve of a liquid crystal panel in an embodiment of the present invention;

FIG5 is a schematic diagram of a flickering waveform of a liquid crystal panel in an embodiment of the present invention;

FIG6 is a schematic diagram of a fast Fourier transform spectrum of a liquid crystal panel in an embodiment of the present invention;

7 is a schematic diagram of a curve showing a change in flicker intensity versus transmittance of a liquid crystal panel in an embodiment of the present invention;

FIG8 is a schematic structural diagram of a device for evaluating the flexoelectric effect of a liquid crystal panel provided by the present invention;

FIG. 9 is a schematic diagram of the structure of an electronic device provided by the present invention.

Reference numerals:

81: light receiving unit; 82: driving unit; 83: measurement and control unit; 84: data processing unit; 85: liquid crystal panel.

DETAILED DESCRIPTION

In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

The following describes the method for evaluating the flexoelectric effect of a liquid crystal panel of the present invention in conjunction with FIGS. 1 to 7 .

As shown in FIG1 , the present invention provides a method for evaluating the flexoelectric effect of a liquid crystal panel, comprising:

S1, provides working voltage for the LCD panel under test.

Specifically, in an optional embodiment provided by the present invention, as shown in FIG2, a corresponding working voltage is provided for the liquid crystal panel to be tested, and the main working voltage provided is the thin film transistor (TFT) working state voltage of the liquid crystal panel, including the thin film transistor on voltage (VGH), the thin film transistor off voltage (VGL), the gate (Gate) signal voltage of the thin film transistor, the electrical reference ground voltage (GND) voltage, the liquid crystal layer reference voltage (Vcom) of the liquid crystal panel, the source (Data) signal voltage of the thin film transistor, etc., so that the liquid crystal panel can normally display different grayscale images. Different designs of liquid crystal panel TFTs have different corresponding VGH and VGL voltages. Usually, VGH can be 15V, and VGL can be -8V (different TFT designs have different optimal working voltages). GND is the circuit reference voltage 0V, and Vcom is the liquid crystal layer reference voltage of the liquid crystal panel. Usually, a suitable voltage that minimizes the flicker of the panel can be taken, such as 6.5V (the optimal Vcom voltage of different panels will be different).

S2. Turn on the switch of the TFT of the liquid crystal panel to provide the Data signal line of the liquid crystal panel with the driving signal required for measuring the transmittance.

Specifically, in an optional embodiment provided in this embodiment, in this step, a voltage VGH is applied to the Gate signal line to keep the TFT of the liquid crystal panel open. As shown in FIG3 , a driving signal required for measuring transmittance is provided to the Data signal line of the liquid crystal panel, and the driving signal is a square wave driving signal with different amplitudes from low to high, and the frequency of the driving signal is determined according to the designed operating frequency of the liquid crystal panel, and the frequency of the driving signal is half of the designed operating frequency of the liquid crystal panel, for example, for a common 60Hz panel, the driving signal is 30Hz.

S3. Obtain screen brightness data of the liquid crystal panel, and draw a voltage-to-transmittance curve of the liquid crystal panel according to the screen brightness data.

The transmittance of the LCD panel is the ratio between the screen brightness of the LCD panel and the backlight source. In this step, while providing a driving signal to Data, the screen brightness of the LCD panel is obtained, and a voltage-to-transmittance curve (VT curve) as shown in FIG4 is drawn based on the screen brightness data.

S4. Select a transmittance sequence to be measured from the voltage versus transmittance curve, and measure flicker waveform data corresponding to each transmittance in the transmittance sequence.

In this step, it is necessary to select several transmittance point values from the voltage-to-transmittance curve as a transmittance sequence, and then turn on the TFT to provide the Data signal line with the voltage signal required to measure the transmittance, usually a positive and negative square wave signal with the relative Vcom voltage as a reference, and measure the corresponding flicker waveform data at each transmittance in the transmittance sequence. Preferably, when selecting the transmittance sequence to be measured, several relatively uniform transmittance point values can be selected to avoid too dense values in a certain interval. For example, the transmittance sequence that can be selected is: 10%, 25%, 50%, 75%, 90%, 100%, and then the TFT is turned on to provide the Data signal line with the voltage signal required for measuring the transmittance. Different liquid crystal panels have different driving voltages corresponding to their transmittances. Taking a certain liquid crystal panel as an example, its voltage-to-transmittance curve is shown in Figure 4. Assuming that a 2.5V voltage corresponding to a transmittance of 10%, a 3V voltage corresponding to a transmittance of 25%, a 3.5V voltage corresponding to a transmittance of 50%, a 4V voltage corresponding to a transmittance of 75%, a 4.5V voltage corresponding to a transmittance of 90%, and a 5V voltage corresponding to a transmittance of 100% are provided respectively, the corresponding flicker waveform data under each transmittance are measured respectively, and a schematic diagram of the measured flicker waveform is shown in Figure 5. The ordinate in Figure 5 represents the ratio of the current screen brightness of the liquid crystal panel to the initial screen brightness (i.e., at 0 seconds).

S5. Analyze the flicker waveform data and evaluate the strength of its flexoelectric effect.

This step specifically includes:

Obtain the spectrum data corresponding to the flicker waveform data. In an optional embodiment provided by the present invention, the spectrum data corresponding to the flicker waveform can be obtained by fast Fourier transform, and the result of the transformation is shown in FIG6 . Record the flicker intensity corresponding to a specific frequency in the spectrum data. In an optional embodiment provided by the present invention, the specific frequency is twice the signal frequency of the driving signal. For example, when the frequency of the driving signal is 30 Hz, the corresponding flicker intensity at the 60 Hz frequency position is recorded.

A curve of the change of flicker intensity to transmittance at a specific frequency is plotted, and the strength of the flexoelectric effect is evaluated by comparing the flicker intensity at each measuring point of the change curve with the flicker intensity near a specific transmittance. In an optional embodiment provided by the present invention, the evaluation of the flexoelectric effect is mainly carried out near a transmittance of 100% and/or 90%. Near a transmittance of 100% and/or 90%, the smaller the flicker intensity value, the lower the flexoelectric effect. Other grayscales (i.e., other transmittances) are a mixture of flexoelectric and other effects, and are usually used as a reference for evaluation. For example, in an embodiment provided by the present invention, 6 liquid crystal panels are selected, and their corresponding flicker intensity to transmittance change curves are measured. As shown in FIG7 , the flicker intensity value of panel MAT-OP-1284 near a transmittance of 100% and 90% is the smallest, so panel MAT-OP-1284 has a lower flexoelectric effect. In FIG7 , the horizontal axis represents the transmittance, and the vertical axis represents the flicker intensity (in dB). At the same time, by comparing the flicker intensity at different transmittance positions in the figure, we can also understand the difference in the degree of influence of the flexoelectric effect on the display effect of the liquid crystal panel at different gray levels (i.e., at different transmittances).

By implementing the above-mentioned method for evaluating the flexoelectric effect of liquid crystal panels, it is possible to solve the problem in the prior art that the measurement system of the traditional method for measuring the flexoelectric coefficient is relatively complex, the measurement difficulty is high, and the simple liquid crystal flexoelectric coefficient is difficult to be used intuitively to evaluate its influence on the display effect of the liquid crystal panel. By utilizing the flicker measurement method to evaluate the influence of the flexoelectric effect on the display effect of the liquid crystal panel, compared with the traditional method for measuring the flexoelectric coefficient, the measurement difficulty is lower, and the measurement result is more intuitive, which can more accurately evaluate the influence of the flexoelectric effect on the display effect of the liquid crystal panel.

Based on the same inventive concept, the present invention also provides a liquid crystal panel flexoelectric effect evaluation device. The liquid crystal panel flexoelectric effect evaluation device provided by the present invention is described below. The liquid crystal panel flexoelectric effect evaluation device described below and the liquid crystal panel flexoelectric effect evaluation method described above can be referenced to each other.

As shown in FIG. 8 , the present invention provides a device for evaluating the flexoelectric effect of a liquid crystal panel 85 , which includes a light receiving unit 81 , a driving unit 82 , a measurement and control unit 83 and a data processing unit 84 .

In an optional embodiment provided in the present application, the LCD panel 85 is a complete LCD panel to be tested. A simplified driving model schematic diagram of the LCD panel 85 is shown in FIG2 . The LCD panel 85 needs to be pre-processed to bring out the Vcom, Data, and Gate points of the LCD panel 85 and connect the test cable to facilitate connection with the measurement and control unit 83 for measurement.

Among them, the light receiving unit 81 is used to measure the brightness data of the screen of the liquid crystal panel 85. During the measurement process, a stable and reliable backlight needs to be provided to provide light source for the panel. After the light source passes through the liquid crystal panel 85, the light receiving unit 81 is used on the front to measure the screen brightness of the liquid crystal panel 85. The sampling rate of the brightness value sampling of this measurement and control unit is greater than 10 thousand times per second (kSPS). It is recommended to use a sampling rate of more than 100 thousand times per second to achieve a better measurement effect.

The driving unit 82 is used to provide the working voltage for the measured liquid crystal panel 85, turn on the switch of the TFT of the liquid crystal panel 85, and provide the driving signal required for measuring the transmittance for the Data signal line of the liquid crystal panel 85. Specifically, the driving unit 82 provides the TFT working state voltage (including VGH, VGL voltage), Gate signal voltage, GND voltage, and Vcom voltage of the liquid crystal panel 85, Data signal voltage, wherein VGH is the voltage required for turning on the TFT, and VGL is the voltage required for turning off the TFT. The Gate signal line is loaded with the VGH voltage when it is necessary to provide a driving signal to the liquid crystal layer of the liquid crystal panel 85 through the Data signal line, that is, to turn on the TFT operation. When it is necessary to disconnect the connection between the Data and the liquid crystal layer, the Gate signal line provides the VGL voltage. GND is the circuit reference voltage, and Vcom is the liquid crystal layer reference voltage. The Data signal line is loaded with the display signal voltage that needs to be written into the liquid crystal layer. In order to prevent the polarization of the liquid crystal, it is usually a positive and negative square wave signal relative to Vcom.

The measurement and control unit 83 is used to obtain the brightness data and send the brightness data to the data processing unit 84. In an optional embodiment provided by the present invention, in an optional embodiment provided by the present application, the measurement and control unit 83 includes a measuring subunit and a control subunit. The measuring subunit is used to condition the brightness signal collected by the light receiving unit 81 and convert it into a digital signal, and then send it to the data processing unit 84 for processing through a suitable communication mode. The control subunit is used to control the operation of the driving unit 82. In an optional embodiment provided by the present invention, the measurement and control unit 83 may also include a wireless communication module (cellular, Bluetooth, WLAN, etc.), which sends information to the data processing unit 84 by wireless transmission; or, the measurement and control unit 83 may also include a wired communication module, which sends information to the data processing unit 84 by connecting a signal line (USB, network port, etc.).

The data processing unit 84 is used to execute the above-mentioned flexoelectric effect evaluation method of the liquid crystal panel 85, including:

Acquire screen brightness data of the liquid crystal panel 85, and draw a voltage-to-transmittance curve of the liquid crystal panel according to the screen brightness data;

Selecting a transmittance sequence to be measured from the voltage versus transmittance curve, and measuring flicker waveform data corresponding to each transmittance in the transmittance sequence;

The flicker waveform data is analyzed to evaluate the strength of its flexoelectric effect.

In an optional embodiment of the present application, other instrument and equipment combinations can be used to provide the required signal and brightness data acquisition functions, such as using PMT or photodiode for light brightness acquisition, using multiple programmable power supplies and arbitrary waveform generators to provide TFT and LCD panel signals and voltages, using an oscilloscope with data output for data acquisition and export, and a computer to perform data processing.

FIG9 illustrates a schematic diagram of the physical structure of an electronic device. As shown in FIG9 , the electronic device may include: a processor 910, a communications interface 920, a memory 930, and a communication bus 940, wherein the processor 910, the communications interface 920, and the memory 930 communicate with each other through the communication bus 940. The processor 910 may call the logic instructions in the memory 930 to execute the method for evaluating the flexoelectric effect of a liquid crystal panel, and the method includes:

Provide working voltage for the LCD panel under test;

Turning on the switch of the TFT of the liquid crystal panel to provide the Data signal line of the liquid crystal panel with a driving signal required for measuring transmittance;

Acquiring screen brightness data of the liquid crystal panel, and drawing a voltage-to-transmittance curve of the liquid crystal panel according to the screen brightness data;

Selecting a transmittance sequence to be measured from the voltage versus transmittance curve, and measuring flicker waveform data corresponding to each transmittance in the transmittance sequence;

The flicker waveform data is analyzed to evaluate the strength of its flexoelectric effect.

In addition, the logic instructions in the above-mentioned memory 930 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

On the other hand, the present invention further provides a computer program product, the computer program product includes a computer program, the computer program can be stored in a non-transitory computer-readable storage medium, when the computer program is executed by a processor, the computer can execute the liquid crystal panel flexoelectric effect evaluation method provided by the above methods, the method includes:

Provide working voltage for the LCD panel under test;

Turning on the switch of the TFT of the liquid crystal panel to provide the Data signal line of the liquid crystal panel with a driving signal required for measuring transmittance;

Acquiring screen brightness data of the liquid crystal panel, and drawing a voltage-to-transmittance curve of the liquid crystal panel according to the screen brightness data;

Selecting a transmittance sequence to be measured from the voltage versus transmittance curve, and measuring flicker waveform data corresponding to each transmittance in the transmittance sequence;

The flicker waveform data is analyzed to evaluate the strength of its flexoelectric effect.

In another aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, which is implemented when the computer program is executed by a processor to perform the liquid crystal panel flexoelectric effect evaluation method provided by the above methods, the method comprising:

Provide working voltage for the LCD panel under test;

Turning on the switch of the TFT of the liquid crystal panel to provide the Data signal line of the liquid crystal panel with a driving signal required for measuring transmittance;

Acquiring screen brightness data of the liquid crystal panel, and drawing a voltage-to-transmittance curve of the liquid crystal panel according to the screen brightness data;

Selecting a transmittance sequence to be measured from the voltage versus transmittance curve, and measuring flicker waveform data corresponding to each transmittance in the transmittance sequence;

The flicker waveform data is analyzed to evaluate the strength of its flexoelectric effect.

The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative effort.

Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM/RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

Finally, it should be noted that the above embodiments are preferred embodiments of the principles of the present invention, and the principles of the present invention are not limited to the above embodiments. In addition to the above-mentioned embodiments, those skilled in the art can make equivalent data or equivalent process changes to the contents of the specification and drawings of the present invention (for example, grayscale instead of transmittance, flicker instead of spectrum flicker intensity, etc.), or directly or indirectly apply them to other technical fields, which should be included in the patent protection scope of the present invention.

Claims (8)

1. A method for evaluating a flexoelectric effect of a liquid crystal panel is characterized by comprising the following steps:

providing working voltage for the tested liquid crystal panel;

Opening a switch of a TFT of the liquid crystal panel, and providing a driving signal required for measuring transmittance for a Data signal line of the liquid crystal panel;

acquiring screen brightness data of the liquid crystal panel, and drawing a voltage-to-transmittance curve of the liquid crystal panel according to the screen brightness data;

selecting a transmittance sequence to be measured from the voltage-to-transmittance curve, and measuring corresponding flicker waveform data under each transmittance in the transmittance sequence;

analyzing the flicker waveform data and evaluating the strength of the flexoelectric effect of the flicker waveform data;

the flicker waveform data is analyzed to evaluate the strength of the flexoelectric effect, and the method specifically comprises the following steps:

acquiring frequency spectrum data corresponding to the flicker waveform data, and recording corresponding flicker intensity at a specific frequency in the frequency spectrum data, wherein the specific frequency is twice the signal frequency of the driving signal;

And drawing a change curve of the flicker intensity at the specific frequency and the transmittance, and evaluating the strength of the flexoelectric effect by comparing the flicker intensity of each measuring point of the change curve with the flicker intensity of the specific transmittance, wherein the specific transmittance is 90% and/or 100%.

2. The method of claim 1, wherein the driving signals are square wave driving signals of different magnitudes from low to high.

3. The method according to claim 2, wherein the frequency of the driving signal is half of the design operating frequency of the liquid crystal panel.

4. The method for evaluating the flexoelectric effect of a liquid crystal panel according to claim 1, wherein obtaining the spectrum data corresponding to the flicker waveform data, specifically comprises:

and acquiring the frequency spectrum data corresponding to the flicker waveform by using fast Fourier transform.

5. A liquid crystal panel flexoelectric effect evaluation device for performing the liquid crystal panel flexoelectric effect evaluation method according to any one of claims 1 to 4, comprising: the device comprises a light receiving unit, a driving unit, a measurement and control unit and a data processing unit;

the light receiving unit is used for measuring brightness data of a screen of the liquid crystal panel;

The driving unit is used for providing working voltage for the tested liquid crystal panel, opening a switch of a TFT of the liquid crystal panel and providing driving signals required by measuring transmittance for a Data signal line of the liquid crystal panel;

the measurement and control unit is used for acquiring the brightness data and sending the brightness data to the data processing unit;

the data processing unit is used for acquiring screen brightness data of the liquid crystal panel, drawing a voltage versus transmittance curve of the liquid crystal panel according to the screen brightness data, selecting a transmittance sequence to be measured from the voltage versus transmittance curve, measuring corresponding flicker waveform data under each transmittance in the transmittance sequence, analyzing the flicker waveform data, and evaluating the strength of the flexoelectric effect of the flicker waveform data.

6. The device of claim 5, wherein the sampling rate of the measurement and control unit is greater than 10 thousand times per second.

7. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the liquid crystal panel flexoelectric effect evaluation method according to any one of claims 1 to 4 when executing the program.

8. A non-transitory computer-readable storage medium having stored thereon a computer program, wherein the computer program when executed by a processor implements the liquid crystal panel flexoelectric effect evaluation method according to any one of claims 1 to 4.