WO2020082525A1

WO2020082525A1 - Display-panel testing method and device, and display device

Info

Publication number: WO2020082525A1
Application number: PCT/CN2018/120188
Authority: WO
Inventors: 李嘉航
Original assignee: 惠科股份有限公司
Priority date: 2018-10-23
Filing date: 2018-12-11
Publication date: 2020-04-30
Also published as: CN109166505A

Abstract

A display-panel testing method and device and a display device. The testing method comprises: acquiring image data of a display panel, and obtaining a target common voltage of the display panel according to the image data; obtaining a feed voltage according to the target common voltage, a preset grayscale voltage, and a preset feed voltage calculation formula, wherein the preset feed voltage calculation formula represents a correspondence of the feed voltage with the target common voltage and the preset grayscale voltage; and obtaining, according to the feed voltage, a testing result regarding a feed effect of the display panel. The display-panel testing method and device and the display device are employed such that it is not required to use third-party simulation software to measure parasitic capacitance, producing a poor simulation result due to simulation distortion. The invention thus can provide a reliable measuring result.

Description

Display panel detection method, device and display device

This application requires the priority of the Chinese patent application filed on October 23, 2018, with the application number 201811239433.7 and the application name "Display Panel Inspection Method, Device and Display Device", the entire contents of which are incorporated by reference in this document Applying.

Technical field

The present application relates to the field of display technology, in particular to a display panel detection method, device and display device.

Background technique

The statements here only provide background information related to the present application and do not necessarily constitute prior art. With the rapid development of liquid crystal display technology, people are increasingly pursuing the display effect of liquid crystal displays. In a liquid crystal display, the voltage level of the pixel electrode is shifted by the influence of parasitic capacitance or storage capacitance on the TFT (Thin Film Transistor, thin film transistor) substrate, that is, the feed-in effect occurs. At this time, it is necessary to correct the common voltage (Common Voltage, VC0M) of the liquid crystal display according to the feed voltage generated by the offset to avoid the common voltage from deviating from the intermediate value of the positive pixel voltage and the negative pixel voltage of the liquid crystal display panel. This causes flicker when the display of the LCD panel reverses polarity.

The traditional display panel detection method needs to measure the size of the parasitic capacitance through third-party simulation software, so as to obtain the size of the feeding voltage through calculation. The third-party simulation software will cause the simulation results and actual distortion, making the measurement results inaccurate. As a result, the reliability of measurement results of traditional display panel inspection methods is poor.

Application content

According to various embodiments of the present application, a display panel detection method, device, and display device are provided.

A display panel detection method, the method includes:

Obtaining the screen data of the display panel, and obtaining the target common pole voltage of the display panel according to the screen data;

The feed-in voltage is obtained according to the target common-pole voltage, the preset gray-scale voltage, and the preset feed voltage calculation formula, and the preset feed voltage calculation formula characterizes that the feed voltage and the target share Correspondence between the pole voltage and the preset gray scale voltage; and

According to the feed-in voltage, a feed-in effect detection result of the display panel is obtained.

A display panel detection device includes a memory and a processor. The memory stores computer-readable instructions. When the computer-readable instructions are executed by the processor, the processor causes the processor to perform the following steps:

A display device includes a display panel, a memory, and a processor. The memory stores computer-readable instructions. When the computer-readable instructions are executed by the processor, the processor causes the processor to perform the following steps:

The details of one or more embodiments of the application are set forth in the drawings and description below. Other features, objects, and advantages of this application will become apparent from the description, drawings, and claims.

BRIEF DESCRIPTION

In order to more clearly explain the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, without paying any creative work, other drawings may be obtained based on these drawings.

FIG. 1 is a schematic flowchart of a display panel detection method in an embodiment;

FIG. 2 is a schematic diagram of a target common pole voltage acquisition process in an embodiment;

FIG. 3 is a diagram of the correspondence between the gray scale of the binding point and the voltage in an embodiment;

4 is a schematic diagram of the influence of the feed-in voltage on the common pole voltage in an embodiment;

FIG. 5 is a schematic flow chart of obtaining a flicker value by a comparison method in an embodiment;

6 is a graph of the relationship between brightness and time obtained by the comparison method in an embodiment;

7 is a schematic diagram of a process of obtaining flicker value by the JEITA method in an embodiment;

FIG. 8 is a diagram of the correspondence between amplitude and frequency obtained by the JEITA method in an embodiment;

9 is a schematic structural view of a display panel detection device in an embodiment;

10 is a schematic structural view of a display device in an embodiment;

11 is a schematic structural diagram of a display device in another embodiment.

detailed description

In order to facilitate understanding of the application, the application will be described more fully below with reference to related drawings. The drawings show preferred embodiments of the present application. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

Please refer to FIG. 1, a display panel detection method, including: obtaining the screen data of the display panel, and obtaining the target common pole voltage of the display panel according to the screen data; according to the target common pole voltage, the preset gray scale voltage and the preset The feed-in voltage calculation formula obtains the feed-in voltage; according to the feed-in voltage, the feed-in effect detection result of the display panel is obtained.

Specifically, gray scale refers to dividing the brightness change between the brightest and the darkest into several parts, indicating the level of different brightness from the darkest to the brightest, so as to facilitate the control of the screen brightness corresponding to the signal input . Take 8bit panel as an example, with 256 brightness levels, respectively 0-255, we call it 256 gray levels. In a liquid crystal display, each pixel is composed of three sub-pixels of red, green, and blue with different brightness levels to form different color points. Blinking refers to the situation where the brightness of the positive pixel voltage and the negative pixel voltage are not symmetrical, resulting in inconsistent brightness. The feed-in voltage is the voltage shift when the gate voltage is switched from the on-state high level to the off-state low level, due to the presence of parasitic capacitance, which eventually causes the data line voltage applied to the pixel to deviate from the initial voltage the amount. When the pixel is being charged and discharged, the gate scanning voltage turns on the TFT at a high potential. When the charge is completed, the TFT is turned off when the potential is low, and a closed circuit is formed in the pixel while turning off the TFT. During charging, the TFT is instantly pulled from a low potential (generally -7V) to a high potential (generally -30V). After charging is completed, the TFT is instantly lowered from the high potential to the low potential. Therefore, the parasitic capacitance formed between the gate and the source of the TFT will have a greater influence on the pixel voltage, and at this time, the feed-in voltage will be generated.

In the liquid crystal display panel, the common electrode voltage (that is, the common electrode voltage of the liquid crystal display panel, VC0M) can only be set to a fixed value. When the feed voltage is too large, an AC voltage component will be generated on the liquid crystal of the display panel, which is easy Image flicker or image sticking (Image Sticking) occurs. The target common pole voltage refers to the voltage of the common electrode of the display panel when the flicker of the display panel is at a minimum. Only under the condition of the target common pole voltage can the minimum amplitude of flicker or afterimage of the display panel be ensured, and a better display screen can be obtained. It should be noted that the gray scale scintillation screen image data can be collected by the scintillation measurement probe or the brightness meter. When the feed effect detection of the display panel is performed, the gray scale scintillation screen of the display panel is directly received by the scintillation measurement probe or the brightness meter The picture data collected and sent can be analyzed accordingly.

The preset feed voltage calculation formula represents the correspondence between the feed voltage and the target common pole voltage, and the preset gray scale voltage. The preset gray scale voltage refers to the voltage applied under the gray scale of the binding point corresponding to the gray scale screen. In the same manufacturing process, the gray scale voltage of each display panel is constant, and under different manufacturing process conditions, there may be differences. Please refer to FIG. 3, which is the voltage value corresponding to the gray level of the binding point of the gray scale screen in one embodiment. In this embodiment, the gray level of the binding point includes the gray level of the positive binding point and the gray level of the negative binding point. The gray scale voltage value also includes positive gray scale voltage and negative gray scale voltage. The positive gray scale voltage refers to the corresponding driving voltage value under the positive gray scale, and the negative gray scale voltage refers to the corresponding driving voltage value under the negative gray scale. When the feed-in voltage is calculated, it can be obtained according to the input target common pole voltage, the preset feed-in voltage calculation formula, and the preset gray-scale voltage. No need to go through the simulation of third-party software, which avoids the possibility of simulation and actual distortion, and has the advantage of more accurate calculation results of the feed-in voltage.

The offset of the display panel means that the voltage level of the pixel electrode is shifted by the influence of parasitic capacitance or storage capacitance on the TFT substrate, and the parasitic capacitance or storage capacitance on the TFT substrate directly affects the magnitude of the feed voltage, so , The degree of deviation of the display panel can be evaluated according to the magnitude of the feeding voltage (ie, the obtained detection result of the feeding effect of the display panel). It can be understood that the larger the value of the feed voltage, the greater the influence of the voltage level of the pixel electrode on the parasitic capacitance or storage capacitance on the TFT substrate, that is, the greater the degree of deviation of the display panel. It should be noted that, for grayscale scintillation pictures of different grayscales, the above method can be used to calculate the feeding voltage. Similarly, the target common pole voltage is determined according to the flicker value of the grayscale scintillation picture under the grayscale, and then It is calculated according to the preset gray scale voltage and the preset feed voltage calculation formula and the target common pole voltage.

In one embodiment, please refer to FIG. 2 to obtain the screen data of the display panel and obtain the target common pole voltage of the display panel according to the screen data includes: adjusting the common pole voltage of the display panel to obtain the display panel under different common pole voltages The screen data collected when the grayscale flashing screen flashes; according to the screen data, the flashing value under different common polar voltages is obtained, and the common polar voltage corresponding to the minimum flashing value is taken as the target common polar voltage.

Specifically, when the common pole voltage is changed, the grayscale screen will have different degrees of flickering. According to the different grayscale screens, the corresponding screen data is obtained. It should be noted that, when adjusting the common pole voltage, a common pole voltage of a certain size can be used every interval. For example, in one embodiment, the common pole voltage can be adjusted once at a voltage of 0.01V every interval, and then record each In the case of a common pole voltage, the picture data corresponding to the grayscale picture. It can be understood that, in other embodiments, the voltage values of other sizes may be spaced, a common pole voltage adjustment may be performed once, and then picture data corresponding to each common pole voltage may be recorded. By continuously adjusting the common pole voltage, the corresponding picture data is obtained, so as to facilitate the comparative analysis of the obtained picture data and obtain the flicker value corresponding to the picture data.

In one embodiment, when the common pole voltage is adjusted, the color analyzer can be aligned to the center of the display panel, the display panel displays the corresponding grayscale flashing picture, and the color analyzer to the corresponding common pole voltage in the Gamma IC The register sends corresponding adjustment commands, and the common-polarity voltage register outputs different common-polarity voltages to make the gray-scale flashing screen of the display panel flicker, and then obtains the blinking value corresponding to each common-polarity voltage to analyze the target common-polarity voltage.

The target common pole voltage means that under this common pole voltage, the gray scale flashing picture has the lowest flickering degree, that is, the smallest flickering value. Each time the common pole voltage is adjusted, the blink value of the blinking screen under the common pole voltage is obtained, and the obtained blink values are compared and analyzed to obtain the minimum blink value, and then the common pole voltage corresponding to the blink value is found, which is the target Common pole voltage. Further, in an embodiment, in order to obtain a more accurate target common pole voltage, after comparing and analyzing each obtained flicker value to obtain the minimum flicker value, the common pole voltage corresponding to the minimum flicker value is the same as the previous common pole voltage Between the common pole voltage corresponding to the voltage and the minimum flicker value and the latter common pole voltage, the flicker value is measured again at a smaller voltage interval to ensure the accuracy of the target common pole voltage; for example, a common voltage interval of 0.1V When the pole voltage is adjusted, the common pole voltage is 3V when the minimum flicker value is obtained. In order to ensure the accuracy of the target common pole voltage, between 2.9V-3V and 3V-3.1V, the voltage interval is 0.01V, again Perform flicker value measurement. It can be understood that, in other embodiments, other methods may be used to further determine the target common pole voltage, which is not limited to the methods in the above embodiments. The flicker value is measured by adjusting the common pole voltage to obtain the target common pole voltage, so as to facilitate the calculation and analysis of the feed-in voltage according to the common pole voltage in the subsequent steps.

In one embodiment, the preset gray-scale voltage includes a positive gray-scale voltage and a negative gray-scale voltage. According to the target common-pole voltage, the preset gray-scale voltage, and the preset feed voltage calculation formula, the feed-in voltage is obtained as :

Where ΔV _p is the feed-in voltage, V _{d +} is the positive gray-scale voltage, V _d- is the negative gray-scale voltage, and V ′ _com is the target common-pole voltage.

Specifically, please refer to FIG. 4, during the charging and discharging process of the pixel, if there is no influence of the feeding voltage, the common pole voltage can be represented by the center of the positive and negative gray-scale voltage, that is

However, the generation of the feed-in voltage will cause an AC component on the liquid crystal of the display panel. At this time, if the influence of the feed-in voltage is considered, the ideal target common-pole voltage is:

Therefore, we can ensure that when the common pole voltage is in the ideal and optimal state, the feed-in voltage can be based on:

Calculation.

In one embodiment, please refer to FIG. 5, the screen data is the brightness composition data, and obtaining the flicker value under different common-pole voltages according to the screen data includes: obtaining AC data and DC data of the grayscale flashing screen; according to the AC data and DC data To get the corresponding blink value.

Specifically, the AC data refers to the data of the brightness part generated by the AC voltage at a certain brightness of the display panel, and the DC data refers to the data of the brightness part generated by the DC voltage at the same brightness, which is specifically expressed as The AC voltage and the DC voltage provided when the display panel reaches the corresponding brightness. You can measure the grayscale scintillation screen displayed on the display panel by the scintillation measurement probe to obtain the brightness composition data of the grayscale scintillation screen under the corresponding common pole voltage condition within a certain period of time. Please refer to FIG. 6 The relationship curve with time shows. It can be obtained according to the change relationship of the brightness of the grayscale flashing picture within a certain period of time. Under the common pole voltage, the size of the AC data and the size of the DC data.

Under certain conditions, the flash appears on the display panel is called flicker. The flicker in the liquid crystal display panel usually occurs periodically, which will cause greater damage to the human eye. In the process of periodically changing the voltage (which can also be brightness) of the grayscale blinking picture, the larger the amplitude, the more obvious the blinking. According to the obtained gray-scale picture brightness change relationship with time, it includes both the brightness change caused by AC data and the brightness change caused by DC data. According to the analysis and calculation of AC data and DC data, the corresponding The flicker value under the condition of common pole voltage.

Further, in an embodiment, according to the AC data and the DC data, the corresponding flicker value is obtained as:

Among them, S is the flicker value, A is AC data, and D is DC data.

Specifically, the ratio of AC data to DC data is the flicker value. In one embodiment, the AC data is V _max -V _min and the DC data is

Among them, V _max is the maximum voltage, V _min is the minimum voltage. Since the brightness of the screen is proportional to the voltage, different voltages are used to represent different brightness directly, so V _max also represents the maximum brightness, and V _min represents the minimum brightness. by

The flicker value is calculated, where S is the flicker value, V _max is the maximum voltage, and V _min is the minimum voltage. The comparison method (that is, calculation based on AC data and DC data) is used to obtain the flicker value of the grayscale flicker screen under each common pole voltage, so that in the subsequent steps, the target common pole voltage can be analyzed and judged according to the flicker value, and it has simple operation The advantages.

In one embodiment, please refer to FIG. 7, the picture data is frequency composition data, and obtaining the flicker value under different common-pole voltages according to the picture data includes: obtaining the first frequency data and the second frequency data of the gray scale flicker picture; One frequency data and the second frequency data, to obtain the corresponding flicker value.

Specifically, since the human flicker perception starts to decrease at about 30 Hz, and the human eye cannot perceive after the frequency exceeds 60 Hz, and the flicker of the liquid crystal display panel usually exceeds 30 Hz, the JEITA method can accurately measure the flicker-related Amplitude and frequency, and then get the corresponding flicker value; JEITA method is a flicker value measurement method based on JEITA standard. Acquire the brightness of the grayscale flashing picture of the display panel through the brightness meter, obtain the corresponding signal and transmit it to the integrator, send the signal through a filter that reduces the sensitivity due to the frequency difference, and then output the signal to the FFT (Fast Fourier) Transform (Fast Fourier Transform) analyzer is processed and displayed by an energy component composed of a frequency, that is, an energy relationship constituted by the frequency corresponding to flicker. It should be pointed out. In one embodiment, the first frequency data is the energy amplitude corresponding to the maximum frequency, and the second frequency data is the energy amplitude corresponding to zero frequency (in the case of DC). It can be understood that, in other embodiments, within the range allowed by the error, the first frequency data may also be the energy amplitude corresponding to the frequency closer to the maximum frequency, and the second frequency data may also be closer to the zero frequency The energy amplitude corresponding to the frequency. During the detection of the feed-in effect of the display panel, directly receive the frequency composition data obtained by the brightness meter and processed by the integrator and FFT analyzer, and then perform the corresponding analysis.

According to the frequency composition energy data, the corresponding amplitude value in each frequency composition, that is, the corresponding relationship between frequency and amplitude value can be obtained. According to the amplitude when the frequency is 0, and the amplitude of the maximum frequency in the case of other frequencies, the corresponding flicker value can be obtained by analyzing and calculating. In the case of different common pole voltages, the situation of each frequency composition is also different. According to the comparative analysis of the flicker values obtained under the conditions of each common pole voltage, the corresponding common pole voltage at the minimum flicker can be obtained.

Further, in an embodiment, according to the first frequency data and the second frequency data, the corresponding flicker value is obtained:

Where S is the flicker value, P _X is the first frequency data, and P _O is the second frequency data.

Specifically, please refer to FIG. 8, which is a structural diagram of an energy relationship structure of frequency in an embodiment, in which the abscissa represents frequency and the ordinate represents amplitude. The amplitude when the frequency is 0 is recorded as P _O. In this embodiment, it also has two other frequency components, the amplitudes of which are P _X1 and P _X2 , of which the larger amplitude is P _X1 , so the corresponding Flash value

The flicker value is measured by the JEITA method, which is not limited by the frequency range that can be observed by the human eye, and can accurately measure the amplitude and frequency related to flicker, and has the advantage of high measurement accuracy.

The above display panel detection method can obtain the target common pole voltage corresponding to the display panel according to the screen data of the display panel, and then obtain a correspondence according to the obtained target common pole voltage and the preset gray scale voltage and the preset feed voltage calculation formula The feed-in voltage of the display panel to obtain the feed-in effect detection result of the display panel. The above display panel detection method does not need to measure the size of the parasitic capacitance through third-party simulation software, will not cause the results of deviation due to simulation distortion, and has the advantage of strong reliability of the measurement results.

Referring to FIG. 9, a display panel detection device includes a memory and a processor. The memory stores computer readable instructions. When the computer readable instructions are executed by the processor, the processor is caused to perform the following steps: obtain screen data of the display panel And obtain the target common pole voltage of the display panel according to the screen data; according to the target common pole voltage, the preset gray scale voltage and the preset feed voltage calculation formula, the feed voltage is obtained, and the preset feed voltage calculation formula is characterized Correspondence between the feed-in voltage and the target common-pole voltage and the preset gray-scale voltage; and the feed-in effect detection result of the display panel is obtained according to the feed-in voltage.

In the liquid crystal display panel, the common electrode voltage (that is, the common electrode voltage of the liquid crystal display panel, VC0M) can only be set to a fixed value. When the feed voltage is too large, an AC voltage component will be generated on the liquid crystal of the display panel, which is easy Produce flickering or afterimages. The target common pole voltage refers to the voltage of the common electrode of the display panel when the flicker of the display panel is at a minimum. Only under the condition of the target common pole voltage can the minimum amplitude of flicker or afterimage of the display panel be ensured, and a better display screen can be obtained. It should be noted that the gray scale scintillation screen image data can be collected by the scintillation measurement probe or the brightness meter. When the feed effect detection of the display panel is performed, the gray scale scintillation screen of the display panel is directly received by the scintillation measurement probe or the brightness meter The picture data collected and sent can be analyzed accordingly.

In one embodiment, obtaining the screen data of the display panel and obtaining the target common-pole voltage of the display panel according to the screen data includes: adjusting the common-pole voltage of the display panel, and obtaining a gray-scale blinking picture for the display panel under different common-pole voltage The screen data acquired when flickering occurs; according to the screen data, the flicker value under different common pole voltages is obtained, and the common pole voltage corresponding to the minimum flicker value is taken as the target common pole voltage.

In one embodiment, obtaining the flicker value under different common-pole voltages according to the picture data includes: obtaining AC data and DC data of the gray-scale flicker picture; and obtaining the corresponding flicker value according to the AC data and the DC data.

In one embodiment, according to the AC data and the DC data, the corresponding flicker value is obtained:

Among them, S is the flicker value, A is AC data, and D is DC data.

In an embodiment, obtaining the flicker value under different common-pole voltages according to the picture data includes: obtaining the first frequency data and the second frequency data of the grayscale flicker picture; according to the first frequency data and the second frequency data, obtaining the corresponding Flashing value.

In one embodiment, according to the first frequency data and the second frequency data, the corresponding flicker value is obtained as:

In one embodiment, the preset gray-scale voltage includes a positive gray-scale voltage and a negative gray-scale voltage. According to the target common-pole voltage, the preset gray-scale voltage, and the preset feed-in voltage calculation formula, the feed-in voltage is obtained as :

The above display panel detection device can obtain the target common pole voltage corresponding to the display panel according to the screen data of the display panel, and then obtain a correspondence according to the obtained target common pole voltage and the preset gray scale voltage and the preset feed voltage calculation formula The feed-in voltage of the display panel to obtain the feed-in effect detection result of the display panel. The above display panel detection device does not need to measure the size of the parasitic capacitance through third-party simulation software, does not cause deviations in the results due to simulation distortion, and has the advantage of strong reliability of the measurement results.

Referring to FIG. 10, a display device includes a display panel 20, a memory, and a processor. The memory stores computer readable instructions. When the computer readable instructions are executed by the processor, the processor is caused to perform the following steps: obtain a screen of the display panel Data, and obtain the target common pole voltage of the display panel according to the screen data; according to the target common pole voltage, the preset gray scale voltage and the preset feed voltage calculation formula, the feed voltage is obtained, and the preset feed voltage calculation formula Characterize the corresponding relationship between the feeding voltage and the target common-pole voltage and the preset gray-scale voltage; and according to the feeding voltage, obtain the feeding effect detection result of the display panel.

In one embodiment, referring to FIG. 11, the display panel 20 includes: an array substrate 21; a color filter substrate 22, the color filter substrate 22 is disposed opposite to the array substrate 21; and a liquid crystal layer 23, which is disposed on the array substrate 21 and Between the color filter substrates 22.

Specifically, the array substrate 21 is a thin film transistor array substrate on which data lines arranged in a first direction and scan lines arranged in a second direction are provided, and pixels arranged in an array are defined at the intersection of the data lines and the scan lines After the scan signal and the data signal are provided to the pixel unit, the pixel unit emits light. The color film substrate 22 has a glass substrate composed of a glass substrate, a black matrix, a color layer, a protective layer, and an ITO conductive film, and can accurately select light passing through a certain wavelength range and reflect light in other wavelength ranges. The array substrate 21 and the color filter substrate 22 are oppositely arranged, and the image display can be performed under the driving of the light source and the corresponding driving signal.

In one embodiment, the array substrate 21 includes a plurality of pixel units arranged in an array.

Specifically, the array substrate 21 has a plurality of scan lines arranged in the first direction and a plurality of signal lines arranged in the second direction, the plurality of scan lines and the plurality of signal lines are insulated and intersected, and the plurality of scan lines and the plurality of The signal line insulation intersects to define a plurality of pixel units arranged in an array. Each scan line is respectively connected to a corresponding array substrate row drive circuit to provide a scan drive signal for each pixel row. After each pixel unit provides a scan drive signal and a data drive signal through the scan line and the data line, the corresponding display function is completed.

In one embodiment, the pixel unit includes a red (Red, R) color pixel unit, a green (Green, G) color pixel unit, a blue (Blue, B) color pixel unit, and a white (White, W) color pixel unit. The pixel unit of the array substrate is set to four colors of RGBW, which is applied to the display device, and only the white pixel unit needs to be provided with a corresponding transparent area on the color filter, which can improve the light transmittance of the color filter and reduce the backlight Energy consumption of the module. The specific arrangement of the RGBW four-color pixel units can be arranged according to actual usage. For example, in one embodiment, the pixel units in each pixel row are arranged in a RGBW four-color cycle. It can be understood that in other embodiments, the pixel unit includes a red pixel unit, a green pixel unit, and a blue pixel unit, and the pixel units may also be arranged in a cyclic manner of RGB three-color pixel units.

In one embodiment, the display device further includes: a first polarizer 30 disposed on the side of the color film substrate 22 away from the liquid crystal layer 23; and a second polarizer 40 disposed on the side of the array substrate 21 away from the liquid crystal layer 23 .

Specifically, the liquid crystal material is placed between two pieces of transparent conductive glass attached with a polarizer with a vertical optical axis, and liquid crystal molecules are distributed parallel to the transparent conductive glass when no voltage is applied, and two pieces of transparent conductive glass are respectively arranged For alignment films that are oriented perpendicular to each other, the liquid crystal molecules are sequentially arranged in accordance with the direction of the fine grooves of the alignment film. If no electric field is applied, light enters from the second polarizer 40, and the polarization direction is rotated 90 degrees according to the arrangement of the liquid crystal molecules. It is emitted from the first polarizer 30 and is in a bright state at this time. If after two pieces of conductive glass are energized, an electric field will be formed between the two pieces of conductive glass, which will affect the arrangement of liquid crystal molecules between them. When the voltage is large enough, the molecules are arranged vertically along the electric field, the polarization direction of the light does not change, and the light cannot penetrate , And then the light source is blocked, so that a dark state is formed when voltage is applied.

In one embodiment, the display device further includes a backlight module. Specifically, the backlight module provides the display panel with sufficient brightness and uniformly distributed light sources to enable it to display images normally. The liquid crystal display is a passive light-emitting element, and does not emit light through the display panel itself. The display panel displays images or characters as a result of modulating light.

Further, in one embodiment, the backlight module is an edge-lit backlight module. Specifically, the edge-lit backlight module means that the light source (Edge) is disposed on the side of the light guide plate, and the light guide plate illuminates the light evenly behind the liquid crystal panel. The design of the edge-lit backlight module makes the display device have the advantages of light weight, thinness, narrow frame and low power consumption. It can be understood that, in other embodiments, the backlight module may also be a direct type backlight module or a hollow type backlight module, as long as it can provide a corresponding light source for the display device.

In one embodiment, a computer-readable storage medium is provided on which computer-readable instructions are stored. When the computer-readable instructions are executed by a processor, the following steps are implemented:

Obtain the screen data of the display panel, and obtain the target common pole voltage of the display panel according to the screen data; according to the target common pole voltage, the preset gray scale voltage and the preset feed voltage calculation formula, the feed voltage is obtained, the preset The feed-in voltage calculation formula characterizes the corresponding relationship between the feed-in voltage, the target common-pole voltage, and the preset gray-scale voltage; according to the feed-in voltage, the detection effect of the feed-in effect of the display panel is obtained.

In one embodiment, when the computer-readable instructions are executed by the processor, the following steps are also implemented:

Adjust the common-pole voltage of the display panel to obtain the screen data collected when the gray-scale flickering screen of the display panel flickers under different common-pole voltages; according to the screen data, obtain the flicker value under different common-pole voltages and minimize the flicker value The corresponding common pole voltage is taken as the target common pole voltage.

Acquire the AC data and DC data of the grayscale flashing picture; according to the AC data and DC data, get the corresponding flashing value.

Obtain the first frequency data and the second frequency data of the grayscale blinking picture; according to the first frequency data and the second frequency data, obtain the corresponding blinking value.

A person of ordinary skill in the art may understand that all or part of the process in the method of the foregoing embodiments may be completed by instructing relevant hardware through computer-readable instructions, and the computer-readable instructions may be stored in a non-volatile computer In the readable storage medium, when the computer-readable instructions are executed, they may include the processes of the foregoing method embodiments. Wherein, any reference to the memory, storage, database or other media used in the embodiments provided in this application may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous chain (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

The above display device and storage medium can obtain the target common pole voltage corresponding to the display panel according to the screen data of the display panel, and then obtain the calculated formula according to the obtained target common pole voltage, the preset gray scale voltage and the preset feed voltage Corresponding feed-in voltage, so as to obtain the feed-in effect detection result of the display panel. The above display device and the storage medium do not need to measure the size of the parasitic capacitance through third-party simulation software, and there is no deviation due to simulation distortion, which has the advantage of strong reliability of the measurement result.

The technical features of the above-mentioned embodiments can be arbitrarily combined. In order to simplify the description, all possible combinations of the technical features in the above-mentioned embodiments are not described. All should be considered within the scope of this description.

The above-mentioned embodiment only expresses several implementation manners of the present application, and its description is more specific and detailed, but it should not be understood as limiting the scope of the patent application. It should be noted that, for those of ordinary skill in the art, without departing from the concept of the present application, a number of modifications and improvements can also be made, which all fall within the protection scope of the present application. Therefore, the protection scope of the patent of this application shall be subject to the appended claims.

Claims

A display panel detection method, the method includes:

Obtaining the screen data of the display panel, and obtaining the target common pole voltage of the display panel according to the screen data;

The feed-in voltage is obtained according to the target common-pole voltage, the preset gray-scale voltage, and the preset feed voltage calculation formula, and the preset feed voltage calculation formula characterizes that the feed voltage and the target share Correspondence between the pole voltage and the preset gray scale voltage; and

According to the feed-in voltage, a feed-in effect detection result of the display panel is obtained.
The method for detecting a display panel according to claim 1, wherein the step of acquiring the screen data of the display panel and obtaining the target common pole voltage of the display panel according to the screen data includes:

Adjusting the common-pole voltage of the display panel to obtain the picture data collected when the gray-scale blinking picture flashes on the display panel under different common-pole voltages;

The flicker value under different common pole voltages is obtained according to the picture data, and the common pole voltage corresponding to the minimum flicker value is taken as the target common pole voltage.
The display panel detection method according to claim 2, wherein the obtaining the flicker value at different common pole voltages according to the picture data includes:

Acquire the AC data and DC data of the gray scale flashing picture;

According to the AC data and the DC data, corresponding flicker values are obtained.
The display panel detection method according to claim 3, wherein the step of obtaining the corresponding flicker value based on the AC data and the DC data is:

Among them, S is the flicker value, A is AC data, and D is DC data.
The display panel detection method according to claim 2, wherein the obtaining the flicker value at different common pole voltages according to the picture data includes:

Acquiring the first frequency data and the second frequency data of the grayscale flashing picture;

According to the first frequency data and the second frequency data, corresponding flicker values are obtained.
The display panel detection method according to claim 5, wherein the step of obtaining the corresponding flicker value according to the first frequency data and the second frequency data is:

Where S is the flicker value, P X is the first frequency data, and P O is the second frequency data.
The display panel detection method according to claim 1, wherein the preset gray scale voltage includes a positive gray scale voltage and a negative gray scale voltage, and the predetermined gray scale voltage and The preset feed-in voltage calculation formula, the steps to get the feed-in voltage are:

Where ΔV p is the feeding voltage,
Is the positive gray scale voltage,
It is a negative gray-scale voltage, and V'com is the target common pole voltage.
A display panel detection device includes a memory and a processor. The memory stores computer-readable instructions. When the computer-readable instructions are executed by the processor, the processor causes the processor to perform the following steps:

Obtaining the screen data of the display panel, and obtaining the target common pole voltage of the display panel according to the screen data;

The feed-in voltage is obtained according to the target common-pole voltage, the preset gray-scale voltage, and the preset feed voltage calculation formula, and the preset feed voltage calculation formula characterizes that the feed voltage and the target share Correspondence between the pole voltage and the preset gray scale voltage; and

According to the feed-in voltage, a feed-in effect detection result of the display panel is obtained.
The display panel detection device according to claim 8, wherein the acquiring screen data of the display panel and obtaining the target common pole voltage of the display panel according to the screen data include:

Adjusting the common-pole voltage of the display panel to obtain the picture data collected when the gray-scale blinking picture flashes on the display panel under different common-pole voltages;

The flicker value under different common pole voltages is obtained according to the picture data, and the common pole voltage corresponding to the minimum flicker value is taken as the target common pole voltage.
The display panel detection device according to claim 9, wherein the obtaining the flicker value under different common pole voltages according to the picture data comprises:

Acquire the AC data and DC data of the gray scale flashing picture;

According to the AC data and the DC data, corresponding flicker values are obtained.
The display panel detection device according to claim 10, wherein the corresponding flicker value obtained according to the AC data and the DC data is:

Among them, S is the flicker value, A is AC data, and D is DC data.
The display panel detection device according to claim 9, wherein the obtaining flicker values at different common pole voltages according to the picture data includes:

Acquiring the first frequency data and the second frequency data of the grayscale flashing picture;

According to the first frequency data and the second frequency data, corresponding flicker values are obtained.
The display panel detection device according to claim 12, wherein the corresponding flicker value obtained according to the first frequency data and the second frequency data is:

Where S is the flicker value, P X is the first frequency data, and P O is the second frequency data.
The display panel detection device according to claim 8, wherein the preset gray scale voltage includes a positive gray scale voltage and a negative gray scale voltage, and the predetermined gray scale voltage and The preset feed-in voltage calculation formula to obtain the feed-in voltage is:

Where ΔV p is the feeding voltage,
Is the positive gray scale voltage,
It is a negative gray-scale voltage, and V'com is the target common pole voltage.
A display device includes a display panel, a memory, and a processor. The memory stores computer-readable instructions. When the computer-readable instructions are executed by the processor, the processor causes the processor to perform the following steps:

Obtaining the screen data of the display panel, and obtaining the target common pole voltage of the display panel according to the screen data;

The feed-in voltage is obtained according to the target common-pole voltage, the preset gray-scale voltage, and the preset feed voltage calculation formula, and the preset feed voltage calculation formula characterizes that the feed voltage and the target share Correspondence between the pole voltage and the preset gray scale voltage; and

According to the feed-in voltage, a feed-in effect detection result of the display panel is obtained.
The display device according to claim 15, wherein the display panel comprises:

Array substrate;

A color filter substrate, the color filter substrate and the array substrate are disposed oppositely; and

The liquid crystal layer is disposed between the array substrate and the color filter substrate.
The display device according to claim 16, wherein the array substrate includes a plurality of pixel units arranged in an array.
The display device according to claim 16, wherein the display device further comprises:

A first polarizer disposed on the side of the color filter substrate away from the liquid crystal layer; and

The second polarizer is disposed on the side of the array substrate away from the liquid crystal layer.
The display device according to claim 15, wherein the display device further comprises a backlight module.
The display device according to claim 19, wherein the backlight module is an edge-lit backlight module.