WO2018205953A1

WO2018205953A1 - Flicker debugging method and apparatus for liquid crystal display panel

Info

Publication number: WO2018205953A1
Application number: PCT/CN2018/086170
Authority: WO
Inventors: 张永新; 王世豪
Original assignee: 京东方科技集团股份有限公司
Priority date: 2017-05-10
Filing date: 2018-05-09
Publication date: 2018-11-15
Also published as: CN107065252B; CN107065252A

Abstract

Disclosed are a flicker debugging method and apparatus for a liquid crystal display panel. The liquid crystal display panel comprises a plurality of pixel electrodes and at least one common electrode. The flicker debugging method comprises: applying a first common voltage to the common electrode, and acquiring a specific grayscale voltage, complying with a gamma curve, of a specific grayscale and acquiring at least one sampling grayscale voltage, complying with the gamma curve, of at least one sampling grayscale; applying the specific grayscale voltage to the pixel electrodes, adjusting the common voltage applied to the common electrode, and obtaining, by means of detecting a flicker value of a display image of the liquid crystal display panel, a common voltage when the flicker value is minimum and taking same as a second common voltage; and applying the second common voltage to the common electrode, adjusting the at least one sampling grayscale voltage, and obtaining, by means of detecting the flicker value of the display image of the liquid crystal display panel, a grayscale voltage when the flicker value is minimum and taking same as a gamma reference voltage of a corresponding sampling grayscale. In such a way, the probability of a disadvantageous flicker occurring in a display image when displayed in full grayscale can be reduced.

Description

Method and device for debugging flicker of liquid crystal display panel

The present application claims priority to Chinese Patent Application No. 201710328880.9, filed on May 10, s.

Technical field

Embodiments of the present disclosure relate to a method and apparatus for debugging a liquid crystal display panel.

Background technique

The pixel voltage Vn applied to the pixel electrode in the liquid crystal display (LCD) varies up and down on the common voltage Vcom applied to the common electrode.

Summary of the invention

Embodiments of the present disclosure provide a method and apparatus for blinking a liquid crystal display panel, which can reduce the probability of flickering of a display screen when displaying in full gray scale.

Embodiments of the present disclosure provide a method for debugging a flicker of a liquid crystal display panel, the liquid crystal display panel including a common electrode and a pixel electrode, the flashing debugging method including: applying a first common voltage to the common electrode, and acquiring a specific gray a specific gray scale voltage of the order conforming to the gamma curve and at least one sampling gray scale voltage of the at least one sampling gray scale conforming to the gamma curve; applying the specific gray scale voltage to the pixel electrode, adjusting the application to the a common voltage on the common electrode, and obtaining a common voltage when the flicker value is the smallest as a second common voltage by detecting a flicker value of a display screen of the liquid crystal display panel; and applying the second common voltage to the Adjusting the at least one sampling gray scale voltage on the common electrode, and detecting a flicker value of the display screen of the liquid crystal display panel to obtain a gray scale voltage when the flicker value is minimum as a gamma reference voltage corresponding to the sampling gray scale .

In one example, the at least one sampling gray scale includes a maximum gray scale, a minimum gray scale, and at least one intermediate gray scale between a maximum gray scale and a minimum gray scale, the applying the first common voltage to the common electrode And acquiring the specific gray scale voltage of the specific gray scale conforming to the gamma curve and the at least one sampling gray scale voltage of the at least one sampling gray scale conforming to the gamma curve comprises: applying the first common voltage to the common electrode And adjusting a voltage applied to the pixel electrode to obtain a voltage when the display screen of the liquid crystal display has a maximum brightness value as a first gray scale voltage corresponding to a maximum gray scale and a minimum brightness of a display screen of the liquid crystal display The voltage at the time of the value is the second sampled grayscale voltage corresponding to the minimum grayscale; and the at least one intermediate luminance corresponding to the at least one intermediate grayscale is obtained according to the maximum luminance value, the minimum luminance value, and the gamma curve a value; adjusting a voltage applied to the pixel electrode to obtain at least one intermediate sample corresponding to the at least one intermediate brightness value Gray scale voltage.

In one example, the particular grayscale is a grayscale between the largest grayscale and the smallest grayscale.

In one example, the at least one sampled gray scale voltage includes a plurality of sampled gray scale voltages, and the adjusting the at least one sampled gray scale voltage includes adjusting all of the sampled gray scale voltages.

In one example, the number of the at least one sampled gray scale voltage is 8, 9, or 11.

In one example, the at least one sampling gray scale is: 0 gray scale, 1 gray scale, 31 gray scale, 63 gray scale, 127 gray scale, 191 gray scale, 254 gray scale, 255 gray scale.

In one example, the measured frequency of the flicker value is equal to the picture frame rate of the display picture.

In an example, after determining all the gamma reference voltages, the flicker value debugging method further includes: determining an afterimage of the liquid crystal display panel by switching a black and white grid screen displaying a certain time period to a gray scale display screen degree.

In one example, the detecting a flicker value of a display screen of the liquid crystal display panel is performed using a linear camera.

In one example, the at least one sampling gray scale includes a plurality of sampling gray scales, in which the maximum sampling gray scale differs from the next largest sampling gray scale by m, the minimum sampling gray scale and the second small sampling The gray scale differs by n, and any two sampling gray scales except the maximum sampling gray scale and the minimum sampling gray scale are different by k, wherein at least one of m and n is smaller than k.

Another embodiment of the present disclosure provides a flicker debugging device for a liquid crystal display panel, wherein the liquid crystal display panel includes a common electrode and a pixel electrode, and the flicker debugging device includes: an acquiring unit, a first adjusting unit, and a second adjusting unit. And a detecting unit; wherein the acquiring unit is configured to acquire a specific gray scale voltage of a specific gray scale conforming to a gamma curve and at least one sampling gray scale according to the method when a first common voltage is applied to the common electrode At least one sampling gray scale voltage of the gamma curve; the detecting unit configured to detect a flicker value of a display screen of the liquid crystal display panel; the first adjusting unit configured to apply the specific gray scale voltage to the pixel a voltage applied to the common electrode, and a common voltage when the flicker value of the display screen is minimized is obtained as a second common voltage by the detecting unit; the second adjusting unit is configured to be in the actual Adjusting the at least one sampling gray scale voltage when a common voltage is applied to the common electrode, and according to the inspection The flicker value of the display screen measured by the measuring unit is used as the gamma reference voltage of the at least one sampling gray scale when the flicker value of the display screen is minimized.

In one example, the detection unit comprises a linear camera.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure and related art, the drawings used in the embodiments or the related art description will be briefly described below. Obviously, the drawings in the following description are merely Some embodiments of the disclosed embodiments may also obtain other figures from those skilled in the art without departing from the drawings.

1 is a schematic diagram showing changes in a pixel voltage waveform;

2 is a schematic flow chart of a method for debugging a liquid crystal display panel according to an embodiment of the present disclosure;

3 is a schematic flow chart of a method for debugging a liquid crystal display panel according to an embodiment of the present disclosure;

4 is a schematic diagram of adjusting a sampling gray scale voltage according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of a frame flip display screen according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of the degree of residual image observation according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of a flashing debugging device of a liquid crystal display panel according to an embodiment of the present disclosure;

FIG. 8 is a block diagram of a flashing debugging device of a liquid crystal display panel according to an embodiment of the present disclosure.

detailed description

The technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. It is apparent that the described embodiments are part of the embodiments of the disclosed embodiments, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the described embodiments of the present disclosure without the inventive effort are within the scope of the embodiments of the present disclosure.

As shown in FIG. 1 , the pixel voltages V0 V V255 correspond to 0 gray scales to 255 gray scales, respectively. When the pixel voltage is greater than the common voltage Vcom, the pixel is positive; when the pixel voltage is less than the common voltage Vcom, the pixel is negative. For the pixel voltage corresponding to each gray scale, the two frames are changed more than the common voltage Vcom and less than the common voltage Vcom, and the absolute values of the difference between the pixel voltages of the two frames before and after the common voltage Vcom are the same. The gray scale is unchanged when displayed.

Due to the difference in the manufacturing process of the LCD and the influence of impurity ions in the liquid crystal cell, the common voltage Vcom has a certain bias in the actual display, that is, there is a bias voltage ΔV between the actual common voltage and the theoretical common voltage. When the liquid crystal panel is displayed, especially for some special industries (instrument instrument panel, long-time display, map, etc.), the normal flipping of liquid crystal molecules in the liquid crystal cell is adversely affected, thereby easily causing the same to be applied to the display panel. When the grayscale voltage of the opposite polarity (including the positive polarity gray scale voltage and the negative polarity gray scale voltage) is different, the display screen brightness corresponding to the positive polarity gray scale voltage and the negative polarity gray scale voltage is different, and the display screen flickers, and further Causes afterimages.

Embodiments of the present disclosure provide a method for debugging a flicker of a liquid crystal display panel. The liquid crystal display panel includes a common electrode and a pixel electrode. As shown in FIG. 2, the flashing debugging method includes:

Step S101: applying an initial common voltage (ie, a first common voltage) to the common electrode, and acquiring a specific gray scale voltage and at least one sampling gray scale for a specific gray scale and at least one sampling gray scale according to the gamma curve. Voltage.

It should be noted that, firstly, the gamma curve generally uses an exponential curve with a gamma value of 2.2, but the embodiment of the present disclosure is not limited thereto, and may be an exponential curve having other gamma values. For example, use an exponential curve with a gamma value of 2.2, which is Gamma2.2.

Second, the specific gray scale may be one of the plurality of sampling gray scales, or may not be the sampling gray scale voltage of the plurality of sampling gray scale voltages; correspondingly, the specific gray scale voltage may be multiple samples. One sampling gray scale voltage of the gray scale voltage may not be the sampling gray scale voltage of the plurality of sampling gray scale voltages; the embodiment of the present disclosure does not limit this, and may be actually set according to actual needs.

Third, for the actual selection of the plurality of sampling gray scale voltages, those skilled in the art should understand that for the display screen of full gray scale (for example, 0 to 255 gray scale), the pixel voltage adjustment values are the same. Next, the change in the actual luminance value of the display screen of the larger luminance region and the darker luminance region is smaller than the variation of the actual luminance value of the display screen of the intermediate luminance region. Therefore, in order to ensure that the liquid crystal display panel has a relatively accurate display brightness in a large luminance region and a dark luminance region, the density of the sampling gray scale voltage selected in the large luminance region and the dark luminance region may be greater than the sampling selected in the intermediate luminance region. The density of the gray scale voltage. For example, in a plurality of sampling gray levels, the gray level difference between the maximum sampling gray level and the second largest sampling gray level is m, and the gray level difference between the minimum sampling gray level and the sub-small sampling gray level is n, except The minimum grayscale difference between any two sampling grayscales other than the maximum sampling grayscale and the minimum sampling grayscale is k, wherein at least one of m and n is less than k.

Step S102: applying a specific gray scale voltage to the pixel electrode, and acquiring a common voltage when the flicker value of the display screen is the smallest as the actual common voltage (ie, the second common voltage); adjusting the voltage applied to the common electrode to the first Two common voltages. For example, in Fig. 4, the common voltage is adjusted from Vcom' corresponding to the virtual straight line to Vcom corresponding to the solid straight line.

In this case, when the specific gray scale voltage is one of the plurality of sampling gray scale voltages, the adjusted gray scale voltage applied to the pixel electrode is used as the gamma reference voltage of the specific gray scale.

Here, it is to be noted that the flicker value of the acquired display screen is obtained by calculating the flicker value of the display screen corresponding to the gray scale voltage based on the luminance difference of the display screen before and after the electric field polarity of the liquid crystal display panel is inverted. For example, taking the polarity flip mode of the frame flip as an example, FIG. 5a represents a display screen of the liquid crystal display panel before the electric field polarity is reversed (corresponding to the positive gray scale voltage), and the brightness value of the display screen is L1; FIG. 5b represents liquid crystal. The display screen of the display panel after the electric field polarity is reversed (corresponding to the negative gray scale voltage), the brightness value of the display screen is L2; in this case, according to the brightness value L1 of the display screen before the flip and the display screen after the reverse The screen flicker value F is obtained by the ratio of the absolute value of the difference between the luminance values L2 and the luminance value L1 of the display screen before the flipping, that is, F = - L1 - L2 - / L1. For example, the frame flipping is taken as an example, and the point flipping, the row flipping, or the column flipping may be used. The embodiment of the present disclosure does not limit this.

In addition, it should be noted that the screen flicker value can be obtained for the ratio of the absolute value of the difference between the brightness value L1 of the display screen before the flipping and the brightness value L2 of the display screen after the flipping, and the brightness value L1 of the display screen before the flipping. F, wherein the display screen before flipping and the display screen after flipping may be adjacent two frames of images that have undergone one polarity inversion (for example, the first frame display screen and the second frame display screen), or may be flipped after multiple times of polarity The subsequent frames of the multi-frame are separated (for example, the first frame display screen and the fourth frame display screen). The specific measurement process needs to be determined according to the accuracy range of the measurement frequency of the device for measuring the brightness value. On the basis of the accuracy range of the measurement frequency, for example, the brightness value measurement frequency is equal to the picture frame rate of the display screen, that is, the flicker value. The measured frequency is equal to the frame rate of the picture on the display to obtain an accurate flicker value as much as possible. For example, the resulting flicker value can be an average of a plurality of measured scintillation values.

Step S103, in the case where the actual common voltage is applied to the common electrode, respectively adjusting at least one of the acquired plurality of sampling gray scale voltages, and gray scale corresponding to the flicker value of the corresponding display screen is minimized. The voltage is used as the gamma reference voltage corresponding to the gray scale of the sample. For example, the unadjusted sampling gray scale voltage of the plurality of sampling gray scale voltages may directly serve as a gamma reference voltage corresponding to the gray scale of the sampling.

It should be noted that, in the case that the specific gray scale voltage belongs to one of the plurality of sampling gray scale voltages in step S101, the at least one sampling gray scale voltage of the plurality of sampling gray scale voltages obtained by the above adjustment is divided. A sampled grayscale voltage other than a specific grayscale voltage.

In this step, for the measurement of the flicker value, for example, the flicker value measurement frequency is equal to the picture frame rate of the display screen, and the specific reason is the same as the foregoing, and details are not described herein again.

It should be noted that after the blinking debugging method ends, the obtained actual common voltage and the gamma reference voltage can be stored into the programmable chip, so that the display panel can perform an improved full gray scale display.

In this way, the debugging method of the embodiment of the present disclosure can adjust the at least one sampling gray scale voltage asymmetrically on the basis of ensuring the minimum degree of flicker of the display screen corresponding to a specific gray scale voltage by actual measurement. Obtain a gamma reference voltage corresponding to the minimum flicker value of the display screen. That is, in the embodiment of the present disclosure, the flicker value of the display screen corresponding to a specific gray scale voltage and the at least one gamma reference voltage is minimized by actual adjustment, thereby reducing the display screen of the liquid crystal display panel when displaying in full gray scale. The chance of flickering reduces the chance of occurrence of afterimages.

The specific case of the above step S101 will be further described below. For example, as shown in FIG. 3, the step S101 includes:

Step S1011, applying an initial common voltage Vcom1 to the common electrode, adjusting the pixel voltage applied to the pixel electrode, and using the pixel voltage V when the display screen of the liquid crystal display panel has the maximum brightness value as the first sampling gray scale voltage V255, The pixel voltage V when the display screen of the display panel has the minimum luminance value is used as the second sampling gray scale voltage V0. For example, within the adjustment range of the pixel voltage V, the absolute value of the pixel voltage V may be smaller than the larger one of the absolute values of V0 and V255, and the absolute value of the pixel voltage V may be larger than the smaller of the absolute values of V0 and V255.

It should be noted that the first sampling gray scale voltage corresponds to the maximum gray scale, and the second sampling gray scale voltage corresponds to the minimum gray scale.

Step S1012: Acquire an intermediate brightness value corresponding to the plurality of intermediate gray levels according to the maximum brightness value, the minimum brightness value, and the gamma curve, and the intermediate gray level is a gray level between the maximum gray level and the minimum gray level. Here, the intermediate gray scale, the maximum gray scale, and the minimum gray scale are, for example, sampling gray scales.

For example, a formula in which the number of full gray scales is 256 and the Gamma value is 2.2 is taken as an example, and the intermediate luminance value L _X corresponding to the intermediate gray scale (X gray scale) satisfies the following relationship:

Where L ₂₅₅ is the maximum brightness value, L ₀ is the minimum brightness value, and both are the known values obtained by the determination; then the X gray between the maximum gray level and the minimum gray level can be calculated according to formula (1) The intermediate brightness value L _X corresponding to the order.

The number of intermediate luminance values L _X may be determined according to the number of gamma reference voltages actually required.

For example, eight gamma reference voltages, or nine gamma reference voltages, or eleven gamma reference voltages may be determined through the above steps S101 to S103; that is, all sampling gray scale voltages in the above step S103 are 8 samples. The gray scale voltage, or the 9 sampled gray scale voltages, or the 11 sampled gray scale voltages, is not limited by the embodiment of the present disclosure; the intermediate luminance value L _X is other than the maximum gray scale and the minimum gray scale among all the sampling gray scales. The brightness value corresponding to the middle gray level.

For example, 8 sampling gray scale voltages are acquired, that is, 8 gamma reference voltages are acquired, and the specific gray scale voltage is, for example, one of the plurality of sampling gray scale voltages; in this case, in the embodiment of the present disclosure, further The gray levels corresponding to the eight sampling gray scale voltages are: 0 gray scale, 1 gray scale, 31 gray scale, 63 gray scale, 127 gray scale, 191 gray scale, 254 gray scale, 255 gray scale. The following embodiments are further illustrated by taking the eight sampling gray scale voltages as an example. In this case, the intermediate gray scale (X gray scale) in the above step S1012 is 1 gray scale, 31 gray scale, 63 gray scale, 127 gray scale, 191 gray scale, 254 gray scale; that is, in formula (1) X=1, 31, 63, 127, 191, 254, thereby calculating the corresponding brightness value L _X . In the eight sampling gray levels; the gray level difference between the maximum sampling gray level and the second largest sampling gray level is 1, and the gray level difference between the minimum sampling gray level and the sub-sampling gray level is 1; The grayscale difference between any two sampling grayscales other than the minimum sampling grayscale is at least 30.

Step S1013: Adjust a pixel voltage applied to the pixel electrode according to a gamma curve of a luminance versus voltage gamma value of 2.2 (as shown in FIG. 4) to obtain a sampling grayscale voltage corresponding to each of the plurality of intermediate luminance values.

For example, according to the intermediate luminance value L _X corresponding to the intermediate gray scale (X gray scale) obtained in step S1012, the pixel voltage applied to the pixel electrode is adjusted, and a plurality of sampling gray scale voltages corresponding to the intermediate luminance values L _X can be obtained. .

On the basis of this, in step S102, one of the plurality of sampled gray scale voltages acquired in step S101 can be selected as the specific gray scale voltage, the specific gray scale voltage is applied to the pixel electrode, and the adjustment is applied to The voltage across the common electrode to get the actual common voltage. Based on this, if the specific gray scale voltage is the gray scale voltage corresponding to the maximum gray scale or the minimum gray scale of the plurality of gray scale voltages, the deviation of the actual common voltage is likely to be large, and the probability of flickering on the screen is large, so For example, the specific gray scale voltage is a sampling gray scale voltage corresponding to an intermediate gray scale between the maximum gray scale and the minimum gray scale in the gray scale corresponding to the plurality of sampling gray scale voltages acquired in step S101, for example, the specific gray scale The voltage can be 127 gray scale corresponding sampling gray scale voltage, of course, it can also be 63 gray scale corresponding sampling gray scale voltage. According to the actual application of the display panel, for example, it may be selected within a range of display brightness that is mostly in the actual display of the display panel, and the embodiment of the present disclosure is not limited thereto.

Further, for example, in step S103, respectively, adjusting at least one of the acquired sampling gray scale voltages is: adjusting all of the acquired gray scale voltages of the plurality of sampling gray scale voltages, respectively. When the specific gray scale voltage belongs to one of the plurality of sampling gray scale voltages, since the flicker value of the display screen corresponding to the specific gray scale voltage has been adjusted to the minimum in step S102, and the corresponding gray scale voltage is obtained, Repeat the adjustment. In this case, the sampling gray scale voltage of the plurality of sampling gray scale voltages other than the specific gray scale voltage can be adjusted.

For example, as shown in FIG. 4, different brightnesses respectively correspond to corresponding gray levels. When the specific gray scale voltage corresponds to 127 gray scale, 7 sampling grays corresponding to 0 gray scale, 1 gray scale, 31 gray scale, 63 gray scale, 191 gray scale, 254 gray scale, 255 gray scale respectively in step S103 The positive polarity sampling gray scale voltage and the negative polarity sampling gray scale voltage of the step voltage (located on the gamma curve of the Gamma value of 2.2 shown by the broken line in FIG. 4) are respectively adjusted, and the minimum flicker value of the corresponding display screen is measured. The positive gray scale voltage and the negative gray scale voltage of the corresponding gray scale voltages (V0, V1, V31, V63, V191, V254, V255), for example, for the sampling gray scale voltage corresponding to the 255 gray scale, as shown in the figure As shown in FIG. 4, the positive polarity sampling gray scale voltage and the negative polarity sampling gray scale voltage corresponding to the sampling gray scale voltage are respectively adjusted to Δ1' and Δ1 (based on the actual common voltage), and a display corresponding to 255 gray scales is obtained. The positive gray scale voltage and the negative gray scale voltage of the gray scale voltage V255 corresponding to the minimum flicker value corresponding to the screen (on the gamma curve of the Gamma value of 2.2 shown by the solid line in FIG. 4). In this way, the actual adjustment setting can minimize the flicker value of the display screen corresponding to all the gamma reference voltages, thereby minimizing the probability that the display screen flickers when the liquid crystal display panel is displayed in full gray scale.

Of course, on the basis of obtaining all the gamma reference voltages by the method of the embodiment of the present disclosure, the degree of afterimage of the verification display screen can be further determined. For example, as shown in FIG. 6, it is possible to switch a black and white grid screen ((a) in FIG. 6) to a gray scale display screen ((b) in FIG. 6) by displaying a certain period of time (may be 1 hour). To determine the degree of afterimage of the liquid crystal display panel.

Embodiments of the present disclosure provide a flicker debugging device for a liquid crystal display panel, the liquid crystal display panel including a common electrode and a pixel electrode. Referring to FIG. 8, the blinking debugging apparatus includes: an acquiring unit, a first adjusting unit, a second adjusting unit, and a detecting unit.

The acquisition unit is configured to acquire a specific gray scale voltage of a specific gray scale conforming to a gamma curve and at least one sampling gray scale conforming to the gamma curve when a first common voltage is applied to the common electrode Sampling gray scale voltage;

The detecting unit is configured to detect a flicker value of a display screen of the liquid crystal display panel;

The first adjusting unit is configured to adjust a voltage applied to the common electrode when the specific gray scale voltage is applied to the pixel electrode, and to obtain a minimum value of a flicker value of a display screen by the detecting unit a common voltage as a second common voltage;

The second adjusting unit is configured to adjust the at least one sampling gray scale voltage when the actual common voltage is applied to the common electrode, and display a screen according to a flicker value of a display screen measured by the detecting unit The gray scale voltage when the flicker value is the smallest is used as the gamma reference voltage of the at least one sampling gray scale.

It should be noted that each unit in this embodiment may be a separately provided processor, or may be implemented in one processor integrated in the device, or may be stored in a memory in the form of program code, and processed by one processor. The device calls and executes the functions of each of the above units.

Specifically, the detecting unit may include a linear camera. As shown in FIG. 7 , the linear camera may be a CCD (Charge-coupled Device) high-speed linear camera, and the CCD high-speed linear camera can obtain a display screen. The minimum flashing value.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to the program instructions. The foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

The above is only a specific embodiment of the embodiments of the present disclosure, but the scope of protection of the embodiments of the present disclosure is not limited thereto, and any person skilled in the art can easily within the technical scope disclosed in the embodiments of the present disclosure. All changes or substitutions are intended to be included within the scope of the embodiments of the present disclosure. Therefore, the scope of protection of the embodiments of the present disclosure should be determined by the scope of the claims.

The above is only an exemplary embodiment of the disclosed embodiments, and is not intended to limit the scope of the embodiments of the present disclosure. The scope of the embodiments of the present disclosure is determined by the appended claims.

Claims

A method for debugging a flicker of a liquid crystal display panel, the liquid crystal display panel includes a common electrode and a pixel electrode, and the flashing debugging method includes:

Applying a first common voltage to the common electrode, and acquiring a specific gray scale voltage of a specific gray scale conforming to a gamma curve and at least one sampling gray scale voltage of the at least one sampling gray scale conforming to the gamma curve;

Applying the specific gray scale voltage to the pixel electrode, adjusting a common voltage applied to the common electrode, and obtaining a common voltage when the flicker value is minimum by detecting a flicker value of a display screen of the liquid crystal display panel As a second common voltage;

Applying the second common voltage to the common electrode, adjusting the at least one sampling gray scale voltage, and detecting a flicker value of a display screen of the liquid crystal display panel to obtain a gray scale when the flicker value is minimum The voltage is used as the gamma reference voltage corresponding to the gray scale of the sample.
The blinking debugging method according to claim 1, wherein the at least one sampling gray scale comprises a maximum gray scale, a minimum gray scale, and at least one intermediate gray scale between the maximum gray scale and the minimum gray scale,

The applying a first common voltage to the common electrode and acquiring a specific gray scale voltage of a specific gray scale conforming to a gamma curve and at least one sampling gray scale voltage of the at least one sampling gray scale conforming to the gamma curve includes:

Applying the first common voltage to the common electrode, adjusting a voltage applied to the pixel electrode, and acquiring a voltage when a display screen of the liquid crystal display has a maximum brightness value as a first gray scale corresponding to a maximum gray scale a voltage and a voltage when the display screen of the liquid crystal display has a minimum brightness value as a second gray scale voltage corresponding to a minimum gray level;

Acquiring at least one intermediate brightness value corresponding to the at least one intermediate gray level according to the maximum brightness value, the minimum brightness value, and the gamma curve;

Adjusting a voltage applied to the pixel electrode to obtain at least one intermediate sampling gray scale voltage corresponding to the at least one intermediate luminance value.
The flicker debugging method according to claim 1 or 2, wherein the specific gray scale is a gray scale located between a maximum gray scale and a minimum gray scale.
The flashing debugging method according to any one of claims 1 to 3, wherein the at least one sampling gray scale voltage comprises a plurality of sampling gray scale voltages, and the adjusting the at least one sampling gray scale voltage comprises adjusting all The sampling gray scale voltage.
The flashing debugging method according to any one of claims 1 to 4, wherein the number of the at least one sampling gray scale voltage is 8, 9, or 11.
The flashing debugging method according to any one of claims 5 to 5, wherein the at least one sampling gray scale is the following eight sampling gray scales: 0 gray scale, 1 gray scale, 31 gray scale, 63 gray scale, 127 gray Order, 191 grayscale, 254 grayscale, 255 grayscale.
The flicker debugging method according to any one of claims 1 to 6, wherein the measurement frequency of the flicker value is equal to the picture frame frequency of the display screen.
The flicker debugging method according to any one of claims 1 to 7, wherein after determining all gamma reference voltages, the flicker value debugging method further comprises:

The degree of afterimage of the liquid crystal display panel is measured by switching a black and white grid screen displaying a certain period of time to a gray scale display screen.
The flashing debugging method according to any one of claims 1 to 8, wherein the detecting a flicker value of a display screen of the liquid crystal display panel is performed using a linear camera.
The flashing debugging method according to any one of claims 1 to 9, wherein the at least one sampling gray scale comprises a plurality of sampling gray scales, and among the plurality of sampling gray scales, a maximum sampling gray scale and a second largest The sampling gray scale is different by m, and the minimum sampling gray level is different from the sub-small sampling gray level by n, and any two sampling gray levels except the maximum sampling gray level and the minimum sampling gray level are different by k, wherein at least one of m and n is smaller than k.
A flashing debugging device for a liquid crystal display panel, wherein the liquid crystal display panel includes a common electrode and a pixel electrode, and the flashing debugging device includes: an acquiring unit, a first adjusting unit, a second adjusting unit, and a detecting unit; wherein

The acquisition unit is configured to acquire a specific gray scale voltage of a specific gray scale conforming to a gamma curve and at least one sampling gray scale conforming to the gamma curve when a first common voltage is applied to the common electrode Sampling gray scale voltage;

The detecting unit is configured to detect a flicker value of a display screen of the liquid crystal display panel;

The first adjusting unit is configured to adjust a voltage applied to the common electrode when the specific gray scale voltage is applied to the pixel electrode, and to obtain a minimum value of a flicker value of a display screen by the detecting unit a common voltage as a second common voltage;

The second adjusting unit is configured to adjust the at least one sampling gray scale voltage when the actual common voltage is applied to the common electrode, and display a screen according to a flicker value of a display screen measured by the detecting unit The gray scale voltage when the flicker value is the smallest is used as the gamma reference voltage of the at least one sampling gray scale.
A flashing debugging apparatus according to claim 11, wherein said detecting unit comprises a linear camera.