Method for Detecting Screen of Display Panel and Display Panel

Abstract

The present application discloses a method for detecting a screen of a display panel and a display panel. The method for detecting a screen includes: detecting a change area of a common voltage of a current screen and marking it as a target area; dividing the target area into a plurality of sub-unit areas, comparing the gray scale of each sub-unit area with that of a preset area, marking it as 1 if they are the same, and marking it as 0 if they are different. After the comparison is completed, calculate the number of 1s. If it is greater than or equal to N, start the screen detection mechanism. If it is less than N, do not start the screen detection mechanism; where N is a natural number greater than or equal to 2. The present application detects the target area of the screen, compares it with the preset area, and controls the start of the screen detection mechanism according to the comparison result, thereby improving the problem that some areas of the display screen are too bright or too dark due to the jitter of the voltage on the common line caused by the change of the positive and negative voltage polarities.

Description

Technical Field

[0001] This application relates to the field of display technologies, and particularly to a method for detecting a picture of a display panel and a display panel. Background Art

[0002] Compared with traditional CRT (Cathode Ray Tube technology) and plasma, one of the major advantages of TFT-LCD (Thin Film Transistor Liquid Crystal Display) liquid crystal TVs is power saving. The power consumption of a liquid crystal display is only half of that of a CRT of the same size, and is much lower than that of plasma. There is no radiation at all in the display area of the liquid crystal display, and there is only a small amount of electromagnetic waves from the driving circuit. As long as the outer shell is strictly sealed, EMI (Electromagnetic Interference) can be reduced. Therefore, its radiation index is generally lower than that of CRT. The visible area of the liquid crystal display is large. The liquid crystal display controls the state of liquid crystal molecules through the electrodes on the display screen to achieve the display purpose. Even if the screen is enlarged, its volume will not increase proportionally (only the size is increased without increasing the thickness, so many products provide a wall-mounted function, which can save more space for users). Moreover, it is much lighter in weight than traditional displays of the same display area. The weight of a liquid crystal TV is about 1 / 3 of that of a traditional TV. Therefore, liquid crystal displays are also called cold displays or environmental protection displays. Currently, LCD displays are developing towards higher resolution, higher display image quality, and larger sizes.

[0003] Liquid crystal works by rotating differently and transmitting different amounts of light depending on different voltages at both ends. When performing polarity inversion (dot inversion), the common voltage VCOM on the common line is easily interfered by the data line. Compared with the optimal VCOM, the voltage of VCOM jitters, and this jitter will cause abnormalities such as crosstalk in the picture. Summary of the Invention

[0004] The purpose of the embodiments of this application is to provide a method for detecting a picture of a display panel and a display panel that can improve the display abnormality caused by the jitter of the common voltage during polarity change.

[0005] This application discloses a method for detecting a picture of a display panel, and the picture detection method includes:

[0006] S1: Detect the change area of the common voltage of the current picture and mark it as the target area;

[0007] S2: Divide the target area into multiple sub-unit areas, compare the gray level of each sub-unit area with that of the preset area. If they are the same, mark it as 1; if different, mark it as 0. After the comparison is completed, calculate the number of 1s. If it is greater than or equal to N, start the screen detection mechanism; if it is less than N, do not start the screen detection mechanism;

[0008] where N is a natural number greater than or equal to 2.

[0009] Optionally, the sub-unit area includes at least 4 cells, arranged in two rows and two columns. The first cell in the first row is y1, the second cell in the first row is y2, the first cell in the second row is s1, and the second cell in the second row is s2. The preset area has the same number of cells as the sub-unit area. The first cell in the first row is A1, the second cell in the first row is A2, the first cell in the second row is B1, and the second cell in the second row is B2. The step S2 includes the following steps:

[0010] S21: Use y1 as the starting end for detection and comparison, detect the cells row by row. When y1 is judged, compare A1 in the preset area with y1. If they match, then compare A2 with y2. If they match, mark y1 as start A; if A2 and y2 do not match, then compare y2 with A1, erase the starting end mark of y1. If A1 and y2 match, mark y2 as start A;

[0011] S22: After marking the starting end of the first row, use s1 as the starting end for detection in the second row, and continue to compare s1 with B1, and s2 with B2. Compare B1 with s1. If they match, then compare B2 with s2. If they match, mark s1 as start B; if B2 and s2 do not match, then compare s2 with B1, erase the starting end mark of s1. If A1 and y2 match, mark s2 as start B;

[0012] S23: When all comparisons between the current sub-unit area and the preset area match, mark the current sub-unit area as 1. If any comparison result does not match in the above comparisons, re-detect and compare the next sub-unit area.

[0013] Optionally, in step S22, when judging the A class, it is necessary to record the last positions x(n) and x(n + 1) corresponding to the sub-unit area and A1 / A2; when judging the B class, it is also necessary to record the last positions y(m) / y(m + 1) corresponding to the sub-unit area and B1 / B2;

[0014] Compare the sizes of m and n, and take the smaller value when calculating the total number finally, that is, the total number of detections in one row is reduced to (m - start) / 2 = 5.

[0015] Optionally, the step S2 further includes:

[0016] Determine whether the sub-unit areas within the target area are segmented. If segmentation occurs, after the comparison of the previous sub-unit area is completed, re-find the starting end and the terminal end. For each detected and compared sub-cell area segment, the hit sub-unit area is counted as 1, and the non-hit one is counted as 0;

[0017] Record the total number of hits within two rows , calculate the total area of the detection area , compare the total area with the preset area S. If ≥S, then enter the screen detection mechanism;

[0018] Among them, = , p represents the number of segmented segments, represents the number of hits for each segment; the area of the detection area = , V represents the number of rows of the display screen, S represents the critical area for entering the screen detection mechanism, and K is a natural number.

[0019] Optionally, two adjacent sub-unit areas are respectively the first sub-unit area and the second sub-unit area. The cell at the second column of the first row and the cell at the first column of the first row of the first sub-unit area are the same cell, and the cell at the second column of the second row and the cell at the first column of the second row of the second sub-unit area are the same cell.

[0020] Optionally, the screen detection method further includes a detection step, and the detection step includes:

[0021] After starting the function of the screen detection mechanism, output a polarity inversion control signal to the drive circuit to determine whether the crosstalk area of the current screen is the target area; if so, continue to enable the screen detection mechanism, if not, re-detect the screen to determine the area where the screen detection mechanism needs to be enabled.

[0022] Optionally, the screen detection method further includes the following steps:

[0023] After starting the function of the screen detection mechanism, if the total number of 1s detected within the sub-unit area is less than N, then exit the screen detection mechanism.

[0024] Optionally, the sub-unit area includes at least 4 cells, arranged in two rows and two columns. The first cell in the first row is y1, the second cell in the first row is y2, the first cell in the second row is s1, and the second cell in the second row is s2. The preset area has the same number of cells as the sub-unit area. The first cell in the first row is A1, the second cell in the first row is A2, the first cell in the second row is B1, and the second cell in the second row is B2. The step S2 includes the following steps:

[0025] Take y1 as the starting end for detection and comparison. When y1 is judged, compare A1 in the preset area with y1. If a hit occurs, then compare A2 with y2. If a hit occurs, then take s1 as the detection starting end. When s1 is judged, compare B1 in the preset area with s1. If a hit occurs, then compare B2 with s2. If a hit occurs, then mark the current sub-unit area as 1; if any comparison result is a miss in the above comparisons, then re-detect and compare the next sub-unit area.

[0026] This application also discloses a display panel, which is driven by any one of the above-mentioned screen detection methods. The display panel includes a detection module, a comparison module, a counting module, and a screen detection mechanism activation module. The detection module detects the change area of the common voltage of the current screen and marks it as the target area; the comparison module compares the gray scale of each sub-unit area with the preset area and feeds the comparison result back to the counting module. The counting module counts according to the comparison result. If the gray scale of the sub-unit area is the same as that of the preset area, it is marked as 1, and if it is different, it is marked as 0. After the comparison is completed, calculate the number of 1s. If it is greater than or equal to N, then control the screen detection mechanism activation module to activate the screen detection mechanism. If it is less than N, then control the screen detection mechanism activation module not to activate the screen detection mechanism.

[0027] Optionally, the display panel further includes a detection module, which is respectively connected to the detection module and the screen detection mechanism activation module. The detection module detects whether the crosstalk area of the current screen is the target area; if so, then control the screen detection mechanism activation module to continue to activate the screen detection mechanism. If not, then control the detection module to re-detect the screen to determine the area where the screen detection mechanism needs to be activated.

[0028] Compared with the scheme of directly adjusting the common voltage, this application detects the change area of the common voltage of the current screen and marks it as the target area, divides the target area into multiple sub-unit areas, compares the gray scale of each sub-unit area with the preset area. If they are the same, it is marked as 1, and if they are different, it is marked as 0. After the comparison is completed, calculate the number of 1s. If it is greater than or equal to N, then activate the screen detection mechanism. If it is less than N, then do not activate the screen detection mechanism; compare the gray scale of each small area with the preset area to judge that there is a crosstalk problem in the current area, and then activate the screen detection mechanism to adjust, so as to change the display polarity of the data, thereby avoiding the jitter problem caused by large changes in the data polarity of the common voltage, and further improving problems such as screen crosstalk or abnormal screen display caused by common voltage jitter. Description of the Drawings

[0029] The accompanying drawings included are used to provide a further understanding of the embodiments of the present application, which form a part of the description, and are used to illustrate the implementation manners of the present application and, together with the written description, to explain the principles of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts. In the drawings:

[0030] Figure 1 is a schematic flowchart of a screen detection method according to the first embodiment of the present application;

[0031] Figure 2 is a schematic flowchart of a screen detection method according to the second embodiment of the present application;

[0032] Figure 3 is a schematic diagram of an exemplary preset area cell of the present application;

[0033] Figure 4 is a schematic diagram of target area detection (1) according to the second embodiment of the present application;

[0034] Figure 5 is a schematic diagram of target area detection (2) according to the second embodiment of the present application;

[0035] Figure 6 is a schematic flowchart of a screen detection method according to the third embodiment of the present application;

[0036] Figure 7 is a schematic diagram of target area detection according to the third embodiment of the present application;

[0037] Figure 8 is a schematic flowchart of a screen detection method according to the fourth embodiment of the present application;

[0038] Figure 9 is a schematic diagram of the structure of a display panel according to the fifth embodiment of the present application.

[0039] Among them, 100, display panel; 110, detection module; 120, comparison module; 130, counting module; 140, screen detection mechanism activation module; 150, detection module. Detailed implementation manners

[0040] It should be understood that the terms, specific structures and functional details disclosed here are only for the purpose of describing specific embodiments, which are representative, but the present application can be specifically implemented in many alternative forms and should not be construed as being limited only to the embodiments set forth herein.

[0041] The present application will be described in detail below with reference to the drawings and optional embodiments.

[0042] ReferenceFigure 1 As shown in the figure, as the first embodiment of the present application, the screen detection method includes:

[0043] S1: Detect the change area of the common voltage of the current screen and mark it as the target area;

[0044] S2: Divide the target area into multiple sub-unit areas, compare the gray scale of each sub-unit area with that of the preset area. If they are the same, mark it as 1; if they are different, mark it as 0. After the comparison is completed, calculate the number of 1s. If it is greater than or equal to N, start the screen detection mechanism; if it is less than N, do not start the screen detection mechanism;

[0045] wherein, N is a natural number greater than or equal to 2.

[0046] Considering the influence of the positive and negative polarities of the display panel on the common voltage on the common line and referring to the appearance of the crosstalk screen, the present application detects the change area of the common voltage of the current screen and marks it as the target area; divides the target area into multiple sub-unit areas, and compares the gray scale of each sub-unit area with that of the preset area. Through the subdivided sub-unit areas, it is possible to more accurately determine whether the detected area needs to start the screen detection mechanism. It is not to start it directly, but to judge for a specific area, that is, the target area. Compare the gray scale of each sub-unit area with that of the preset area. If they are the same, mark it as 1; if they are different, mark it as 0. After the comparison is completed, calculate the number of 1s. If it is greater than or equal to N, start the screen detection mechanism, thereby changing the polarity on the data line, reducing the interference of the positive and negative polarities on the common voltage on the common line, and improving the screen crosstalk problem; if it is less than N, do not start the screen detection mechanism to avoid mis-starting, which will affect the normal display of the screen and increase the power consumption at the same time.

[0047] As Figure 2 shown, as the second embodiment of the present application, which is a further refinement and improvement of the above first embodiment, the sub-unit area includes at least 4 cells, arranged in two rows and two columns. The first cell in the first row is y1, the second cell in the first row is y2, the first cell in the second row is s1, and the second cell in the second row is s2. The preset area has the same number of cells as the sub-unit area. The first cell in the first row is A1, the second cell in the first row is A2, the first cell in the second row is B1, and the second cell in the second row is B2. The step S2 in the above includes the following steps:

[0048] S21: Take y1 as the starting end for detection and comparison, detect the cells row by row. When y1 is judged, compare A1 in the preset area with y1. If they match, compare A2 with y2. If they match, mark y1 as start A; if A2 and y2 do not match, compare y2 with A1, and erase the starting end mark of y1. If A1 and y2 match, mark y2 as start A;

[0049] S22: After marking the start of the first row, the second row uses s1 as the detection start, and continues to compare s1 with B1, and s2 with B2. Compare B1 with s1. If a hit occurs, then compare B2 with s2. If a hit occurs, mark s1 as start B; if B2 and s2 do not hit, then compare s2 with B1, and erase the start mark of s1. If A1 and y2 hit, then mark s2 as start B;

[0050] S23: When all comparisons between the current sub-unit area and the preset area are hits, mark the current sub-unit area as 1. If any comparison result is a miss in the above comparisons, re-detect and compare the next sub-unit area.

[0051] In this embodiment, taking the example that each sub-unit area contains four cells, each cell can correspond to a pixel area or multiple pixel areas, and can be selected and set according to requirements and the computing power of the corresponding chip; refer to Figures 3 to 5 as shown, where 1 / 2… represents columns; x / y / s / k represents rows, and the smallest unit for judgment is each row. When judging y1, compare A1 in Figure 3 with y1 in Figure 4 and a hit occurs; then compare A2 with y2. If a hit occurs, mark it as. If NG at this time, here, y2 cannot be immediately judged out, but instead compare it with A1 again and erase the Start mark of y1; that is, start a new Start point judgment with A1 again. If y2 meets the condition, then start is y2, if not, continue downward; the judgment of the second row after finding start, that is, the B row, is also the same. As Figure 4 shown, it is a schematic diagram of the difference in the second row between the new and old parts. It can be seen that a loop judgment will be made on the position of StartB (if s2 does not meet B2, then s2 starts again as Start. If s2 does not meet B1, then continue to find s3 as Start, and so on).

[0052] In addition, it should be noted that when judging category A, the last positions x(n) and x(n + 1) corresponding to the sub-unit area and A1 / A2 need to be recorded; when judging category B, the last positions y(m) / y(m + 1) corresponding to the sub-unit area and B1 / B2 also need to be recorded; compare the sizes of m and n, and finally take the smaller value downward when calculating the total number, that is, the total number of detections in one row is reduced to (m - start) / 2 = 5.

[0053] Considering that there are cases where the sub-cells in the sub-unit area of the target area have inconsistent endings, such as Figure 5Taking the example shown, for the case where the end points at the end of the module are inconsistent, that is, the first and second columns in the red box are different from the previous first and second columns, when determining Class A, it is necessary to record the positions of the last A1 / A2, x(n) and x(n + 1) (which need to be adjacent, n = 12 in the figure); similarly, when determining Class B, it is also necessary to record the positions of the last B1 / B2, y(m) / y(m + 1) (which need to be adjacent, m = 10 in the figure); compare the sizes of m and nss, and take the smaller value when finally calculating the total number, that is, the total number of detections in a row is reduced to (m - start) / 2 = 5; thus avoiding the situation where the picture detection mechanism is turned on for sub - cells in a row where the picture detection mechanism does not need to be turned on, which affects the display of other areas.

[0054] Generally, when detecting and comparing, it is compared in a way that overlaps one column before and after. Specifically, two adjacent sub - unit areas are the first sub - unit area and the second sub - unit area respectively. The cell at the second column of the first row in the first sub - unit area and the cell at the first column of the first row in the second sub - unit area are the same cell, and the cell at the second column of the second row in the first sub - unit area and the cell at the first column of the second row in the second sub - unit area are the same cell. In this way, each column can be used as the starting end to re - perform detection and comparison, avoiding the omission of columns 2 and 3 when detecting in the form of columns 1 - 2 and 3 - 4, thus resulting in inaccurate detection.

[0055] Furthermore, the picture detection method further includes a detection step, and the detection step includes:

[0056] After starting the function of the picture detection mechanism, output a polarity inversion control signal to the drive circuit to determine whether the crosstalk area of the current picture is the target area; if so, continue to turn on the picture detection mechanism, if not, re - detect the picture to determine the area where the picture detection mechanism needs to be turned on.

[0057] Through re - detection, determine whether the area where the picture detection mechanism was originally turned on is accurate, and verify the detection method to further ensure the accuracy of the area where the picture detection mechanism is turned on.

[0058] As Figure 6 shown, as the third embodiment of the present application, it is a further improvement of the above - mentioned second embodiment. In the area to be detected in each row, partial segmentation may occur. The step S2 further includes:

[0059] S261: Determine whether the sub - unit area in the target area is segmented. If segmentation occurs, after the comparison of the previous sub - unit area is completed, re - find the starting end and the terminal end. For each sub - cell area after detection and comparison, the hit sub - unit area is counted as 1, and the non - hit one is counted as 0;

[0060] S262: Record the total number of hits in two rows , calculate the total area of the detection area , compare the total area with the preset area S. If ≥S, then enter the screen detection mechanism;

[0061] Among them, = , p represents the number of segments divided, represents the number of hits in each segment; the area of the detection area = , V represents the number of rows of the display screen, S represents the critical area for entering the screen detection mechanism, and K is a natural number.

[0062] In this embodiment, taking Figure 7 as an example, there are three kinds of interruptions in the middle, red 1 / red 2 / red 3; for such cases, first determine the starting point and ending point of green 1, and then calculate the number of OK squares in green 1, that is, (the end of green 1 minus the start of green 1) divided by 2;

[0063] For red 1, it is equivalent to finding the start in the entire 2*2 square, which ends after green 1, and then judging the new start2 of green 2 (A1 / A2 and B1 / B2 are the same) to start again; for red 2, within the module (after the start, every two rows according to the smallest square 2*2), the first row is satisfied and the second row is not satisfied. When the second row is not satisfied, the second row will keep looking for a new start3. After finding it, it is also necessary to judge whether this B-type 1*2 square is satisfied. If it is satisfied, then proceed to the next judgment; whether the row adjacent to the first row is a hit. If not, then continue to find start3 until the hit ends; for example, in the figure, y9 / y10 satisfy the B-type 1*2 square, but x9 does not satisfy A1 (if x10 does not satisfy A2, the situation is the same), then start3 needs to continue to find down to y12. At this time, y12 / y13 are satisfied, and x12 / 13 satisfy A1 / A2, so start3 is y12, that is, the section from 8 to 12 in this module (xy two rows) is not counted.

[0064] At this time, in the second segment, the number of OK squares is only here in green 2, that is, (the end of green 2 minus the start of green 2) divided by 2; for red 3, when the second row is satisfied and the first row is not satisfied, it is to find a new start in the first row (equivalent to finding the start in the entire 2*2 square), the same as steps 3 / 9; the number of OK squares is only here in green 3, that is, (the end of green 3 minus the start of green 3) divided by 2;

[0065] In this embodiment, after the segmentation, just find the new starting point and ending point, and then only the OK part in each segment is counted, and the rest is discarded; then record the total number within the two rows = where p represents the number of segments to be divided, represents the number of hits per segment; among them, the area = , V represents the number of rows of the display screen. If ≥S, where S is set in advance, indicating entering the PDF area critical value, then the PDF is hit and the screen detection mechanism is enabled; in addition, after the screen detection mechanism function is started, if the total number of 1s in the sub-unit area is less than N, the screen detection mechanism is exited.

[0066] As Figure 8 shown, as the fourth embodiment of the present application, different from the above second embodiment, the step S2 in

[0067] includes the following steps:

[0068] S281: Take y1 as the starting end of detection and comparison. When judging y1, compare A1 and y1 in the preset area. If a hit occurs, then compare A2 and y2. If a hit occurs, then take s1 as the detection starting end. When judging s1, compare B1 and s1 in the preset area. If a hit occurs, then compare B2 and s2. If a hit occurs, mark the current sub-unit area as 1; if any comparison result is not a hit in the above comparisons, re-detect and compare the next sub-unit area.

[0069] As Figure 9As shown, as the fifth embodiment of the present application, a display panel 100 is disclosed. The display panel 100 is driven by the screen detection method described in any of the above embodiments. The display panel 100 includes a detection module 110, a comparison module 120, a counting module 130, and a screen detection mechanism activation module 140. The detection module 110 detects the changing area of the common voltage of the current screen and marks it as the target area. The comparison module 120 compares the gray scale of each sub-unit area with that of the preset area and feeds back the comparison result to the counting module 130. The counting module 130 counts according to the comparison result. If the gray scale of the sub-unit area is the same as that of the preset area, it is marked as 1; if different, it is marked as 0. After the comparison is completed, the number of 1s is calculated. If it is greater than or equal to N, the screen detection mechanism activation module 140 is controlled to activate the screen detection mechanism. If it is less than N, the screen detection mechanism activation module 140 is controlled not to activate the screen detection mechanism.

[0070] In this embodiment, the detection module 110 detects the changing area of the common voltage of the current screen and marks it as the target area. The target area is divided into multiple sub-unit areas. The comparison module 120 compares the gray scale of each sub-unit area with that of the preset area. Through the subdivided sub-unit areas, it is possible to more accurately determine whether the detected area needs to activate the screen detection mechanism. It is not activated directly, but for a specific area, and a judgment is made on the specific area, that is, the target area. The gray scale of each sub-unit area is compared with that of the preset area, and the comparison result is fed back to the counting module 130. If they are the same, the counting module 130 marks it as 1; if different, it is marked as 0. After the comparison is completed, the number of 1s is calculated. If it is greater than or equal to N, the screen detection mechanism activation module 140 is controlled to activate the screen detection mechanism, thereby changing the polarity on the data line and reducing the interference of the positive and negative polarities on the common voltage on the common line, improving the problem of picture crosstalk. If it is less than N, the screen detection mechanism is not activated to avoid misactivation, which may affect the normal display of the picture and cause an increase in power consumption. After the function of the screen detection mechanism is activated, if the total number of 1s in the sub-unit area is less than N, the screen detection mechanism activation module 140 is controlled to exit the screen detection mechanism.

[0071] Furthermore, to ensure the accuracy of the area where the screen detection mechanism is activated, the display panel 100 further includes a detection module 150. The detection module 150 is respectively connected to the detection module 110 and the screen detection mechanism activation module 140. The detection module 150 detects whether the crosstalk area of the current screen is the target area. If so, the screen detection mechanism activation module 140 is controlled to continue to activate the screen detection mechanism. If not, the detection module 110 is controlled to re-detect the screen to determine the area where the screen detection mechanism needs to be activated.

[0072] It should be noted that the limitations of each step involved in this solution, without affecting the implementation of the specific solution, are not considered as limiting the order of the steps. That is, the steps written in the front can be executed first, or can be executed later, or even can be executed simultaneously. As long as this solution can be implemented, it should be regarded as falling within the protection scope of this application. The inventive concept of this application can form a very large number of embodiments, but due to the limited space of the application documents, it is impossible to list them all. Therefore, on the premise of not conflicting, the above-described embodiments or various technical features can be arbitrarily combined to form new embodiments. After the combination of each embodiment or technical feature, the original technical effect will be enhanced.

[0073] The above content is a further detailed description of this application in combination with specific optional implementation manners, and it cannot be determined that the specific implementation of this application is only limited to these descriptions. For those of ordinary skill in the technical field to which this application belongs, without departing from the concept of this application, several simple deductions or substitutions can still be made, and all should be regarded as falling within the protection scope of this application.

Claims

1. A method for detecting an image of a display panel, characterized in that: The picture detection method comprises: S1: Detect the change area of ​​the common voltage of the current screen and mark it as the target area; S2: Divide the target area into multiple sub-unit areas, compare the grayscale of each sub-unit area with the grayscale of the preset area, mark them as 1 if they are the same, and mark them as 0 if they are different. After the comparison is completed, calculate the number of 1s, and if it is greater than or equal to N, start the screen detection mechanism, and if it is less than N, do not start the screen detection mechanism; Wherein, N is a natural number greater than or equal to 2; The subunit area includes at least 4 cells, which are arranged in two rows and two columns. The first row and the first column are y1, the first row and the second column are y2, the second row and the first column are s1, and the second row and the second column are s2. The number of cells in the preset area is the same as that in the subunit area. The first row and the first column are A1, the first row and the second column are A2, the second row and the first column are B1, and the second row and the second column are B2. Step S2 includes the following steps: S21: Take y1 as the starting end of the detection and comparison, detect cells row by row, and when y1 is judged, compare A1 and y1 in the preset area, if they hit, then compare A2 and y2, if they hit, then mark y1 as start A; if A2 and y2 do not hit, then compare y2 and A1, erase the starting end mark of y1, if A1 and y2 hit, then mark y2 as start A; S22: After marking the start end of the first row, the second row uses s1 as the detection start end, and continues to compare s1 and B1, and s2 and B2. B1 and s1 are compared. If they hit, B2 and s2 are compared. If they hit, s1 is marked as start B; if B2 and s2 do not hit, s2 is compared with B1, and the start end mark of s1 is erased. If A1 and y2 hit, s2 is marked as startB; S23: When the comparison between the current sub-unit area and the preset area is a hit, the current sub-unit area is marked as 1. If any comparison result is a miss in the above comparison, the next sub-unit area is detected and compared again; Among them, each of the four cells in the sub-unit area is compared with the four cells in the preset area, cell A1 is compared with y1, cell A2 is compared with y2, cell B1 is compared with s1, and cell B2 is compared with s2. When all hits, the screen detection mechanism is started.

2. The image detection method according to claim 1, wherein: In step S22, when determining the A category, it is necessary to record the last position x(n) and x(n+1) of the subunit area corresponding to A1 / A2; when determining the B category, it is also necessary to record the last position y(m) / y(m+1) of the subunit area corresponding to B1 / B2; Compare the sizes of m and n, and take the smaller one when calculating the total number, that is, the total number of detections in a row is reduced to (m-start) / 2=5.

3. The image detection method according to claim 1, wherein: The step S2 further comprises: Determine whether the sub-unit area in the target area is split. If split, after the previous sub-unit area comparison is completed, find the starting end and the end end again. For each sub-unit area detected and compared, the hit sub-unit area count is 1, and the hit sub-unit area count is 0; Record the total number of hits in two lines , calculate the total area of ​​the detection area , compare the total area with the preset area S, if ≥S, then enter the picture detection mechanism; in, = , p represents the number of segments to be divided, Indicates the number of hits per segment; the area of ​​the detection area = , V represents the number of display screen rows, S represents the critical area of ​​the screen detection mechanism, and K is a natural number.

4. The image detection method according to claim 1, wherein: The two adjacent sub-unit areas are the first sub-unit area and the second sub-unit area respectively, the cell in the first row and second column of the first sub-unit area and the cell in the first row and first column of the second sub-unit area are the same cell, and the cell in the second row and second column of the first sub-unit area and the cell in the second row and first column of the second sub-unit are the same cell.

5. The image detection method according to claim 1, wherein: The picture detection method further includes a detection step, and the detection step includes: After the screen detection mechanism function is started, a polarity inversion control signal is output to the driving circuit to determine whether the crosstalk area of ​​the current screen is the target area; if so, the screen detection mechanism continues to be started; if not, the screen is re-detected to determine the area where the screen detection mechanism needs to be started.

6. The image detection method according to claim 1, wherein: The picture detection method also includes the following steps: After the screen detection mechanism function is started, if the total number of 1s in the sub-unit area is detected to be less than N, the screen detection mechanism is exited.

7. A method for detecting an image of a display panel, characterized in that: The picture detection method comprises: S1: Detect the change area of ​​the common voltage of the current screen and mark it as the target area; S2: Divide the target area into multiple sub-unit areas, compare the grayscale of each sub-unit area with the grayscale of the preset area, mark them as 1 if they are the same, and mark them as 0 if they are different. After the comparison is completed, calculate the number of 1s, and if it is greater than or equal to N, start the screen detection mechanism, and if it is less than N, do not start the screen detection mechanism; Wherein, N is a natural number greater than or equal to 2; The subunit area includes at least 4 cells, which are arranged in two rows and two columns. The first row and the first column are y1, the first row and the second column are y2, the second row and the first column are s1, and the second row and the second column are s2. The number of cells in the preset area is the same as that in the subunit area. The first row and the first column are A1, the first row and the second column are A2, the second row and the first column are B1, and the second row and the second column are B2. Step S2 includes the following steps: Take y1 as the starting end of detection and comparison. When judging y1, compare A1 and y1 in the preset area. If they hit, compare A2 and y2. If they hit, take s1 as the starting end of detection. When judging s1, compare B1 and s1 in the preset area. If they hit, compare B2 and s2. If they hit, mark the current sub-unit area as 1; if any comparison result does not hit in the above comparison, re-detect and compare the next sub-unit area.

8. A display panel driven by the image detection method according to any one of claims 1 to 7, characterized in that: The display panel includes a detection module, a comparison module, a counting module and a picture detection mechanism start module. The detection module detects the change area of ​​the common voltage of the current picture and marks it as a target area; the comparison module compares the grayscale of each sub-unit area with that of the preset area, and feeds back the comparison result to the counting module. The counting module counts according to the comparison result, if the grayscale of the sub-unit area is the same as that of the preset area, it is marked as 1, if it is different, it is marked as 0. After the comparison is completed, the number of 1 is calculated. If it is greater than or equal to N, the picture detection mechanism start module is controlled to start the picture detection mechanism. If it is less than N, the picture detection mechanism start module is controlled not to start the picture detection mechanism.

9. The display panel according to claim 8, wherein: The display panel also includes a detection module, which is connected to the detection module and the picture detection mechanism startup module respectively. The detection module detects whether the crosstalk area of ​​the current picture is the target area; if so, the picture detection mechanism startup module is controlled to continue to start the picture detection mechanism; if not, the detection module is controlled to re-detect the picture and determine the area where the picture detection mechanism needs to be started.

Images