Detection method of display panel and display device

Abstract

The application provides a display panel detection method and a display device. The display panel detection method detects the thin film transistor of the current row of pixels when the undetected time of the current row of pixels is greater than a first time threshold, thereby avoiding the electrical property deviation of the thin film transistor caused by the long-time undetection of the pixels, and the display effect of the instantaneous non-display is better than the bright chroma deviation. Meanwhile, when the brightness of the current row of pixels is less than a brightness threshold, it indicates that the brightness of the row of pixels is too low or even not displayed, and the thin film transistor of the row of pixels can be detected, which has a better effect on the display effect. That is, the application realizes the detection of the display panel during the display time, and does not need to detect the display panel during the on-off time of the display panel, thereby shortening the on-off time and improving the display effect.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a method for detecting a display panel and a display device. Background Technology

[0002] Current display devices use thin-film transistors (TFTs) to control the current, enabling the display of different images. However, due to limitations in the manufacturing process, the electrical properties of each TFT are not identical, and these properties drift over time, leading to display abnormalities. Research has found that the threshold voltage and electron mobility of TFTs directly affect their source-drain currents, and differences in threshold voltage and electron mobility result in variations in the brightness of individual pixels. To avoid the effects of TFT electrical drift, current display devices compensate for the threshold voltage and electron mobility of TFTs. Specifically, this is done by detecting the threshold voltage and electron mobility of each TFT and appropriately increasing or decreasing the compensation value to the TFT gate voltage, thereby improving display performance.

[0003] When compensating for thin-film transistors (TFTs), the accuracy of the detected threshold voltage and electron mobility values ​​significantly impacts the compensation effect. To address the aging characteristics of TFTs, the threshold voltage and electron mobility need to be detected periodically. During TFT detection, the emitting pixels must be turned off to ensure accuracy. Therefore, current display devices typically perform the detection process during system power-on or power-off. However, this results in prolonged power-on and power-off times, negatively affecting the user experience.

[0004] Therefore, existing detection methods for display devices have the technical problem that the detection process is executed during power-on and power-off, resulting in long power-on and power-off times. Summary of the Invention

[0005] This application provides a method and device for detecting a display panel, which alleviates the technical problem that existing detection methods for display devices perform the detection process during power-on and power-off, resulting in long power-on and power-off times.

[0006] This application provides a method for detecting a display panel, the method comprising:

[0007] Obtain the display data of the screen to be displayed on the display panel;

[0008] The display data of the screen to be displayed is processed to determine the undetected time of the current row of pixels in the display panel;

[0009] Compare the undetected time of the current row pixels with the first time threshold to determine whether the undetected time of the current row pixels is greater than the first time threshold;

[0010] When the undetected time of the current row pixel exceeds the first time threshold, the thin-film transistor of the current row pixel is detected;

[0011] When the undetected time of the current row pixel is less than or equal to the first time threshold, determine the brightness data of the current row pixel;

[0012] Compare the brightness data of the current row of pixels with the brightness threshold to determine whether the brightness data of the current row of pixels is less than the brightness threshold;

[0013] When the brightness data of the current row of pixels is less than the brightness threshold, the thin-film transistor of the current row of pixels is detected.

[0014] In some embodiments, the step of processing the display data of the screen to be displayed and determining the undetected time of the current row of pixels in the display panel includes:

[0015] The display data of the screen to be displayed is processed to determine the row number of the current row of pixels in the display panel, and the time count of the current row of pixels is determined based on the row number of the current row of pixels.

[0016] The undetected time of the current row of pixels in the display panel is determined based on the time count of the current row of pixels.

[0017] In some embodiments, after the step of detecting the thin-film transistor of the current row pixel when the undetected time of the current row pixel is greater than a first time threshold, the method further includes:

[0018] After detecting the thin-film transistor of the current row of pixels, the time count of the current row of pixels is cleared to zero.

[0019] In some embodiments, the step of determining the brightness data of the current row pixel when the undetected time of the current row pixel is less than or equal to a first time threshold includes:

[0020] When the undetected time of the current row pixel is less than or equal to the first time threshold, a second time threshold is obtained; the second time threshold is less than the first time threshold.

[0021] Compare the undetected time of the current row pixel with the second time threshold to determine whether the undetected time of the current row pixel is greater than the second time threshold;

[0022] When the undetected time of the current row pixel is greater than the second time threshold, the brightness data of the current row pixel is determined.

[0023] In some embodiments, after the step of comparing the undetected time of the current row pixels with a second time threshold to determine whether the undetected time of the current row pixels is greater than the second time threshold, the method further includes:

[0024] If the undetected time of the current row pixel is less than or equal to the second time threshold, the current row pixel is displayed normally, and after the current row pixel is displayed, the undetected time of the current row pixel is modified.

[0025] In some embodiments, the step of determining the brightness data of the current row pixel when the undetected time of the current row pixel is less than or equal to a first time threshold includes:

[0026] When the undetected time of the current row of pixels is less than or equal to the first time threshold, determine the brightness of each pixel in the current row;

[0027] The average brightness of the pixels in the current row is determined based on the brightness of each pixel in the current row, and the average brightness of the pixels in the current row is used as the brightness data of the pixels in the current row; or the average brightness of the pixels in the current row and the brightness of each pixel in the current row are used as the brightness data of the pixels in the current row.

[0028] In some embodiments, the brightness threshold includes a first brightness threshold and a second brightness threshold.

[0029] When the average brightness of the current row of pixels and the brightness of each pixel in the current row are used as the brightness data of the current row of pixels, the step of comparing the brightness data of the current row of pixels with a brightness threshold to determine whether the brightness data of the current row of pixels is less than the brightness threshold includes:

[0030] Compare the brightness of each pixel in the current row with the first brightness threshold to determine whether the brightness of each pixel in the current row is less than the first brightness threshold.

[0031] If there is a pixel in the current row whose brightness is greater than or equal to the first brightness threshold, the current row of pixels will be displayed normally.

[0032] When the brightness of each pixel in the current row is less than the first brightness threshold, the average brightness of the pixels in the current row is compared with the second brightness threshold, and it is determined whether the average brightness of the pixels in the current row is less than the second brightness threshold. When the average brightness of the pixels in the current row is less than the second brightness threshold, the thin-film transistors of the pixels in the current row are detected.

[0033] In some embodiments, when the average brightness of the current row of pixels is used as the brightness data of the current row of pixels, the step of detecting the thin-film transistor of the current row of pixels when the brightness data of the current row of pixels is less than the brightness threshold includes:

[0034] When the average brightness of the current row of pixels is less than the brightness threshold, the thin-film transistor of the current row of pixels is detected.

[0035] In some embodiments, after the step of comparing the brightness data of the current row of pixels with a brightness threshold to determine whether the brightness data of the current row of pixels is less than the brightness threshold, the method further includes:

[0036] When the brightness data of the current row of pixels is greater than or equal to the brightness threshold, the current row of pixels is displayed normally, and after the current row of pixels is displayed, the undetected time of the current row of pixels is modified.

[0037] In some embodiments, after the step of detecting the thin-film transistor of the current row pixel when the brightness data of the current row pixel is less than the brightness threshold, the method further includes:

[0038] After detecting the thin-film transistors of the current row of pixels, the undetected time of the current row of pixels is modified.

[0039] In some embodiments, the step of processing the display data of the screen to be displayed and determining the undetected time of the current row of pixels in the display panel includes:

[0040] The display data of the screen to be displayed is processed to determine the last detection time and the current time of the current row of pixels in the display panel;

[0041] Determine the undetected time of the current row pixel in the display panel based on the last detection time of the current row pixel and the current time.

[0042] Meanwhile, embodiments of this application provide a display device, which includes:

[0043] The acquisition module is used to acquire the display data of the screen to be displayed on the display panel;

[0044] The processing module is used to process the display data of the screen to be displayed and determine the undetected time of the current row of pixels in the display panel;

[0045] The first judgment module is used to compare the undetected time of the current row pixel with the first time threshold to determine whether the undetected time of the current row pixel is greater than the first time threshold.

[0046] The first detection module is used to detect the thin-film transistor of the current row pixel when the undetected time of the current row pixel is greater than a first time threshold.

[0047] The determination module is used to determine the brightness data of the current row of pixels when the undetected time of the current row of pixels is less than or equal to a first time threshold.

[0048] The second judgment module is used to compare the brightness data of the current row of pixels with the brightness threshold to determine whether the brightness data of the current row of pixels is less than the brightness threshold.

[0049] The second detection module is used to detect the thin-film transistor of the current row pixel when the brightness data of the current row pixel is less than the brightness threshold.

[0050] Beneficial Effects: This application provides a detection method and display device for a display panel. After acquiring display data of the image to be displayed on the display panel, the detection method processes the display data to determine the undetected time of the current row of pixels in the display panel. Then, it compares the undetected time of each row of pixels with a first time threshold to determine whether the undetected time of each row of pixels is greater than the first time threshold. If the undetected time of the current row of pixels is greater than the first time threshold, the thin-film transistors of the current row of pixels are detected, thereby preventing brightness shift due to prolonged undetection of the current row. If the undetected time of the current row of pixels is less than or equal to the first time threshold, the brightness data of the current row of pixels can be determined. Then, the brightness data of the current row of pixels is compared with a brightness threshold to determine whether the brightness data of the current row of pixels is less than the brightness threshold. If the brightness data of the current row of pixels is less than the brightness threshold, the thin-film transistors of the current row of pixels are detected, avoiding excessive impact on the display effect caused by detecting the display panel. This application detects the thin-film transistors (TFTs) of the current row of pixels when the undetected time exceeds a first time threshold, thereby avoiding electrical shifts in the TFTs caused by prolonged undetection. Compared to brightness and color shifts, the instantaneous absence of display provides a better display effect. Furthermore, when the brightness of the current row of pixels is less than a brightness threshold, indicating that the brightness of that row of pixels is too low or even not displayed, the TFTs of that row can be detected, which has a better impact on the display effect. In other words, this application achieves detection of the display panel during the display time, eliminating the need for detection during the power-on / off time of the display panel, thus shortening the power-on / off time and improving the display effect. Attached Figure Description

[0051] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0052] Figure 1 This is a first flowchart of a display panel detection method provided in an embodiment of this application.

[0053] Figure 2 This is a second flowchart of a display panel detection method provided in an embodiment of this application.

[0054] Figure 3 This is a schematic diagram of the structure of the display device provided in the embodiments of this application. Detailed Implementation

[0055] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0056] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0057] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0058] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0059] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0060] This application addresses the technical problem that existing display device detection methods perform the detection process during power-on and power-off, resulting in long power-on and power-off times. It provides a display panel detection method and display device to alleviate the aforementioned technical problem.

[0061] like Figure 1 As shown in the figure, this application embodiment provides a method for detecting a display panel, the method for detecting a display panel includes:

[0062] S1, Obtain the display data of the screen to be displayed on the display panel;

[0063] Specifically, the image to be displayed is the next frame of the image that will be displayed. The image to be displayed can be the first frame that needs to be displayed when the display panel changes from the power-off state to the power-on state, or it can be the image that needs to be changed when the display panel changes from one frame to another. It can be understood that the image to be displayed can be a completely black image, an image where all pixels have the same gray level, an image where all pixels have different gray levels, an image where some pixels have the same gray level and some pixels have different gray levels, an image where all pixels have the same display color, an image where all pixels have different display colors, or an image where some pixels have the same display color and some pixels have different display colors.

[0064] Specifically, the display data of the screen to be displayed may include the grayscale of each pixel of the screen to be displayed, the position of each pixel, and the correspondence between the position of each pixel and the grayscale, and may also include the detection data of each pixel.

[0065] Specifically, the grayscale of each pixel can include the grayscale of each sub-pixel; the position of each pixel includes the row and column number of the pixel, or the coordinates of the pixel within the panel; the correspondence between the position of each pixel and the grayscale can be illustrated as follows: the grayscale of the pixel in the first row and first column is the first grayscale, the grayscale of the pixel in the second row and second column is the second grayscale, so the correspondence between the position of each pixel and the grayscale can be determined. For example, when determining that the pixel is the pixel in the first row and first column, its grayscale can be determined to be the first grayscale.

[0066] Specifically, the detection data for each pixel can include the undetected time of the pixel and the correspondence between the pixel's position and its undetected time. The undetected time of each pixel can include the time when the pixel was last detected, or a parameter representing how many frames the pixel has not been detected. For example, if the pixel has not been detected for 100 frames, it can be counted as 100, with 100 indicating that the pixel has not been detected for 100 frames. The position of the pixel can be correlated with the pixel count. For example, if the pixel count in the first row and first column is 100, it means that the pixel in the first row and first column has not been detected for 100 frames.

[0067] S2, process the display data of the screen to be displayed, and determine the undetected time of the current row of pixels in the display panel;

[0068] Specifically, the display data of the image to be displayed contains the grayscale of each pixel, the position of each pixel, and the correspondence between the positions of each pixel and the grayscale. Therefore, this data can be parsed to obtain the position of the current row of pixels. Simultaneously, the undetected time of each row of pixels and the correspondence between the position of each row of pixels and the undetected time can be stored. Thus, the undetected time of the current row of pixels can be determined by the position of the current row of pixels. Alternatively, the display data of the image to be displayed can include the detection data of each pixel. By parsing the display data of the image to be displayed, the undetected time of each row of pixels can be directly obtained.

[0069] In some embodiments, the step of processing the display data of the screen to be displayed and determining the undetected time of the current row of pixels in the display panel includes: processing the display data of the screen to be displayed, determining the number of rows of the current row of pixels in the display panel, and determining the time count of the current row of pixels based on the number of rows of pixels; and determining the undetected time of the current row of pixels in the display panel based on the time count of the current row of pixels. By processing the display data of the screen to be displayed, the number of rows of pixels in the current row can be determined. Then, the time count of the current row of pixels can be determined based on the number of rows of pixels, and the undetected time of the current row of pixels can be determined based on the time count. Therefore, it can be determined whether the current row of pixels has not been detected for a long time, and appropriate processing can be performed accordingly.

[0070] Specifically, taking a display panel with 1920 rows and 1080 columns of pixels as an example, the display data of the image to be displayed will include the position of each pixel in the 1920 rows and 1080 columns of pixels and its grayscale. By processing the display data of the image to be displayed, the row number of the current row of pixels can be determined. For example, if it is the 10th row, the time count of the 10th row of pixels can be determined according to the correspondence between the 10th row of pixels and its detection data. For example, if the time count is 100, it means that the 10th row of pixels has not been detected for 100 frames. Therefore, the undetected time of the current row of pixels can be determined to be 100 frames, or the time count of the current row of pixels of 100 can be taken as the undetected time of the current row of pixels, and then the current row of pixels can be processed accordingly.

[0071] In some embodiments, the step of processing the display data of the image to be displayed and determining the undetected time of the current row pixels in the display panel includes: processing the display data of the image to be displayed to determine the last detection time and the current time of the current row pixels in the display panel; and determining the undetected time of the current row pixels in the display panel based on the last detection time and the current time. By determining the last detection time and the current time of the current row pixels, the undetected time of the current row pixels in the display panel can be determined, thereby allowing for appropriate processing of the current row pixels.

[0072] Specifically, by processing the display data of the screen to be displayed, the position of the current row pixel and the detection data of the current row pixel can be determined. For example, if the current row pixel is determined to be the 10th row pixel, and the last detection time of the 10th row pixel is determined to be 19:00:00 on January 1, 2023, and the current time is 9:00:00 on January 2, 2023, then it can be determined that the current row pixel has not been detected for 14 hours, and then the current row pixel can be processed accordingly.

[0073] S3, compare the undetected time of the current row pixel with the first time threshold, and determine whether the undetected time of the current row pixel is greater than the first time threshold;

[0074] Specifically, the first time threshold is data set according to requirements. The first time threshold can be a numerical value or a parameter or data representing time. For example, the first time threshold can be 100 hours or 100. Different first time thresholds can be set according to the different aging characteristics of thin-film transistors in different display panels. For example, the thin-film transistors of some display panels are severely aged after 200 hours. If electrical compensation is not performed at this time, the display effect will deviate significantly from the normal display effect. In this case, the first time threshold can be set to 200 hours to determine whether the thin-film transistors of the current row of pixels need to be detected and compensated accordingly.

[0075] Specifically, taking a non-detection time of 100 hours for the current row pixel and a first time threshold of 200 hours as an example, the two values ​​can be compared to determine whether the non-detection time of the current row pixel is greater than the first time threshold, and then the current row pixel can be processed accordingly.

[0076] S4, when the undetected time of the current row pixel is greater than the first time threshold, the thin film transistor of the current row pixel is detected;

[0077] Specifically, when the undetected time of the current row pixel exceeds the first time threshold, it indicates that the thin-film transistor of the current row pixel has not been detected for a long time, the thin-film transistor of the current row pixel is severely aged, and the electrical properties are seriously deviated from the normal value. It is necessary to detect the thin-film transistor of the current row pixel so as to realize the electrical properties of the thin-film transistor of the current row pixel and avoid display abnormalities.

[0078] Specifically, for example, if the first time threshold is 200 hours, and the undetected time of the current row pixel is 200 hours plus the time of one frame (determined according to the refresh rate of the display panel), then the thin-film transistor of the current row pixel can be detected, thereby correcting the electrical properties of the thin-film transistor of the current row pixel.

[0079] Specifically, the first time threshold can be set to a large value. Within the range of the first time threshold, the probability of no black screen or low brightness screen appearing is small. Thus, detection can be performed based on brightness to avoid affecting the display. Even if the undetected time of the current row of pixels exceeds the first time threshold, considering that the pixels have not been compensated for a long time, the display effect will be more severely offset. The visual effect of the instantaneous black line caused by detecting the thin film transistor of the current row of pixels is less than the visual effect of the brightness and color shift of the entire row, and will not affect the display effect.

[0080] Specifically, because the timing of the scanning signal is different when detecting the electrical properties of the thin-film transistor than when displaying, pixels in the same row can only be in one of the states of display or detection. That is, they can only be displayed normally or detected by the thin-film transistor. They cannot be displayed or detected in a time-sharing manner, nor can they be detected in columns or regions.

[0081] In some embodiments, after the step of detecting the thin-film transistor of the current row pixel when the undetected time of the current row pixel exceeds a first time threshold, the method further includes: after detecting the thin-film transistor of the current row pixel, resetting the time count of the current row pixel to zero. By resetting the time count of the current row pixel to zero after detecting the thin-film transistor of the current row pixel, the counting can be restarted after the thin-film transistor of the current row pixel is detected, ensuring that the next detection time of the current row pixel does not exceed the first time threshold, and preventing the undetected time of the current row pixel from being too long and affecting the display.

[0082] S5, when the undetected time of the current row pixel is less than or equal to the first time threshold, determine the brightness data of the current row pixel;

[0083] Specifically, when the undetected time of the current row pixel is less than or equal to the first time threshold, it indicates that the electrical offset of the thin-film transistor of the current row pixel is small, and there is no need to immediately stop the display for detection, so as to avoid affecting the display effect.

[0084] Specifically, when the undetected time of the current row pixel is less than or equal to the first time threshold, the brightness data of the current row pixel can be determined. Accordingly, when the brightness of the current row pixel is too low or a black screen is displayed, the current row pixel is detected to compensate for the electrical properties of the thin-film transistor and avoid excessive impact on the display effect.

[0085] In some embodiments, the step of determining the brightness data of the current row pixel when the undetected time of the current row pixel is less than or equal to a first time threshold includes: obtaining a second time threshold when the undetected time of the current row pixel is less than or equal to the first time threshold; the second time threshold is less than the first time threshold; comparing the undetected time of the current row pixel with the second time threshold to determine whether the undetected time of the current row pixel is greater than the second time threshold; and determining the brightness data of the current row pixel when the undetected time of the current row pixel is greater than the second time threshold. By comparing the undetected time of the current row pixel with the second time threshold to determine the magnitude of the undetected time of the current row pixel and the second time threshold, the brightness data of the current row pixel can be determined when the undetected time of the current row pixel is greater than the second time threshold, and the current row pixel can be processed accordingly.

[0086] Specifically, when the undetected time of the current row of pixels exceeds the first time threshold, it indicates that the electrical offset of the thin-film transistors (TFTs) in that row of pixels is relatively severe. Therefore, the TFTs of the current row of pixels will be directly detected. When the undetected time of the current row of pixels is less than or equal to the first time threshold, although the electrical offset of the TFTs in that row of pixels may not be offset or may be low, it is still necessary to detect the electrical offset of the TFTs in that row of pixels in order to improve the display effect of the display panel. Therefore, a second time threshold can be set. The second time threshold is the time when the electrical offset of the TFTs reaches a level that may affect the display effect of the display panel, thereby enabling the display effect of the current row of pixels to reach its optimal level.

[0087] Meanwhile, considering that although detecting thin-film transistors at low brightness has a small impact, it still affects the display effect, a second time threshold can be set to avoid the detection process of thin-film transistors being too intensive, which would lead to a poor display effect. In this case, the second time threshold is the lower limit of the undetected time, indicating that the undetected time is short and no detection is performed to avoid affecting the display effect.

[0088] Specifically, for example, if the second time threshold is set to 1 hour, when the undetected time of the current row pixel is greater than 1 hour, it means that the undetected time of the thin-film transistor of the current row pixel is relatively long. Then the brightness data of the current row pixel can be determined, and corresponding processing can be performed based on the brightness data of the current row pixel.

[0089] In some embodiments, after comparing the undetected time of the current row pixel with a second time threshold to determine whether the undetected time of the current row pixel is greater than the second time threshold, the method further includes: when the undetected time of the current row pixel is less than or equal to the second time threshold, enabling the current row pixel to be displayed normally, and modifying the undetected time of the current row pixel after the current row pixel has been displayed. By enabling the current row pixel to be displayed normally when the undetected time of the current row pixel is less than or equal to the second time threshold, display abnormalities caused by multiple detections of the thin-film transistor of the current row pixel in a short period of time can be avoided. Furthermore, modifying the undetected time of the current row pixel after it is displayed normally ensures the accuracy of the undetected time during subsequent detections.

[0090] Specifically, for example, if the second time threshold is set to 1 hour, when the undetected time of the current row pixel is less than or equal to 1 hour, it means that the undetected time of the current row pixel is small or the offset of the thin film transistor of the current row pixel is low, which has little impact on the display effect. Even if the brightness of the pixel in that row is low, forcibly detecting the thin film transistor of the pixel in that row will still affect the display effect. Therefore, the thin film transistor of the current row pixel can be left undetected.

[0091] Specifically, taking a non-detection time of 100 for the current row of pixels as an example, after the current row of pixels has been displayed normally, the non-detection time of the current row of pixels can be modified to 101 to facilitate subsequent judgment and processing.

[0092] In some embodiments, the step of determining the brightness data of the current row of pixels when the undetected time of the current row of pixels is less than or equal to a first time threshold includes: determining the brightness of each pixel in the current row when the undetected time of the current row of pixels is less than or equal to the first time threshold; determining the average brightness of the current row of pixels based on the brightness of each pixel in the current row, and using the average brightness of the current row of pixels as the brightness data of the current row of pixels; or using the average brightness of the current row of pixels and the brightness of each pixel in the current row as the brightness data of the current row of pixels. By determining the brightness of each pixel in the current row when the undetected time of the current row of pixels is less than or equal to the first time threshold, the average brightness of the current row of pixels can be determined. Accordingly, the average brightness of the current row of pixels can be used as the brightness data, or the brightness of each pixel in the current row and the average brightness of the current row of pixels can be used as the brightness data of the current row of pixels, thereby allowing for appropriate processing of the current row of pixels based on the brightness data of the current row of pixels.

[0093] Specifically, when the pixels in the current row need to be displayed, the brightness data of each pixel in the current row is determined. For example, if the pixels in the first column of the current row display the 10th gray level and the pixels in the second column of the current row display the 11th gray level, the average brightness of the pixels in the current row can be determined based on the brightness of each pixel in the current row. Accordingly, the average brightness of the pixels in the current row can be used as the brightness data of the pixels in the current row, or the average brightness of the pixels in the current row and the brightness of the pixels in the current row can be used as the brightness data of the pixels in the current row.

[0094] S6. Compare the brightness data of the current row of pixels with the brightness threshold, and determine whether the brightness data of the current row of pixels is less than the brightness threshold.

[0095] Specifically, the brightness threshold can be set according to the display effect. For example, if the average brightness of a single row of pixels is lower than a certain level, the impact on the display effect is small when the pixels in that row are not displayed. Therefore, this brightness can be used as the brightness threshold. For example, if 2 gray levels are used as the brightness threshold, it can be determined whether the brightness data of the current row of pixels is less than the brightness threshold, and the current row of pixels can be processed accordingly.

[0096] In some embodiments, the brightness threshold includes a first brightness threshold and a second brightness threshold. When the average brightness of the current row of pixels and the brightness of each pixel in the current row are used as the brightness data of the current row of pixels, the step of comparing the brightness data of the current row of pixels with the brightness threshold and determining whether the brightness data of the current row of pixels is less than the brightness threshold includes: comparing the brightness of each pixel in the current row with the first brightness threshold and determining whether the brightness of each pixel in the current row is less than the first brightness threshold; when there are pixels in the current row with a brightness greater than or equal to the first brightness threshold, displaying the current row of pixels normally; when the brightness of each pixel in the current row is less than the first brightness threshold, comparing the average brightness of the current row of pixels with the second brightness threshold and determining whether the average brightness of the current row of pixels is less than the second brightness threshold, and when the average brightness of the current row of pixels is less than the second brightness threshold, detecting the thin-film transistors of the current row of pixels. Specifically, by setting a first brightness threshold and a second brightness threshold, the brightness of each pixel in the current row is compared with the first brightness threshold to avoid detection of bright pixels that could cause display abnormalities. The average brightness of the pixels in the current row is compared with the second brightness threshold to avoid detection of thin-film transistors in the current row pixels when the brightness is too high, which could lead to a deterioration in display quality. When the average brightness of the pixels in the current row is less than the second brightness threshold, the thin-film transistors in the current row pixels are detected.

[0097] Specifically, the first brightness threshold can be greater than the second brightness threshold. For example, if the first brightness threshold is 10 gray levels and the second brightness threshold is 2 gray levels, the first brightness threshold can be set to 10 and the second brightness threshold to 2. Then, the brightness of each pixel in the current row is compared with the first brightness threshold. For example, if one pixel in the current row displays a gray level of 10, it indicates that there is at least one bright spot in that row. Detecting this would cause display abnormalities, so the pixels in the current row can be displayed normally. When all pixels in the current row have a gray level less than 10, it indicates that there are no bright spots in that row. In this case, the average brightness of the pixels in that row can be compared with the second brightness threshold, and the pixels in that row can be processed accordingly. Specifically, when the average brightness of the pixels in that row is less than the second brightness threshold, the thin-film transistors of the pixels in the current row can be detected. Specifically, the above embodiments are described with brightness thresholds including the first brightness threshold and the second brightness threshold, but the embodiments of this application are not limited to this. When the brightness data of the pixels in the current row is the average brightness of the pixels in the current row, the brightness data of the pixels in the current row can be directly compared with the brightness threshold.

[0098] In some embodiments, after comparing the brightness data of the current row of pixels with a brightness threshold to determine whether the brightness data of the current row of pixels is less than the brightness threshold, the method further includes: when the brightness data of the current row of pixels is greater than or equal to the brightness threshold, enabling the current row of pixels to be displayed normally, and modifying the undetected time of the current row of pixels after the current row of pixels has been displayed. By enabling the current row of pixels to be displayed normally when the brightness data of the current row of pixels is greater than or equal to the brightness threshold, display defects caused by the current row of pixels not being displayed are avoided. Furthermore, by modifying the undetected time of the current row of pixels after the current row of pixels has been displayed, the data for judgment and processing of the current row of pixels in subsequent processes is accurate, avoiding processing errors caused by inaccurate data.

[0099] S7, when the brightness data of the current row pixel is less than the brightness threshold, detect the thin-film transistor of the current row pixel.

[0100] Specifically, when the brightness data of the current row of pixels is less than the brightness threshold, to avoid the current row of pixels having low brightness and to minimize the impact of not displaying the current row of pixels on the display effect, the thin-film transistors of the current row of pixels can be detected to compensate for the electrical properties of the thin-film transistors of the current row of pixels and improve the display effect.

[0101] In some embodiments, when the average brightness of the current row of pixels is used as the brightness data of the current row of pixels, the step of detecting the thin-film transistors (TFTs) of the current row of pixels when the brightness data of the current row of pixels is less than the brightness threshold includes: detecting the TFTs of the current row of pixels when the average brightness of the current row of pixels is less than the brightness threshold. When the average brightness of the current row of pixels is less than the brightness threshold, it indicates that the brightness of each pixel in that row is low, or there is no brightness, and the low average brightness of the row of pixels means that not displaying that row of pixels has a minimal impact on the display effect. Therefore, the TFTs of the current row of pixels can be detected to compensate for the electrical properties of the TFTs and improve the display effect.

[0102] In some embodiments, the step of detecting the thin-film transistors (TFTs) of the current row of pixels when the brightness data of the current row of pixels is less than the brightness threshold includes: detecting the TFTs of the current row of pixels when the average brightness of the current row of pixels is less than the second brightness threshold. When the average brightness of the current row of pixels is less than the second brightness threshold, it indicates that the brightness of each pixel in that row is low, or there is no brightness, and the average brightness of that row of pixels is low. Therefore, not displaying that row of pixels has a minimal impact on the display effect. In this case, the TFTs of the current row of pixels can be detected to compensate for the electrical properties of the TFTs and improve the display effect.

[0103] In some embodiments, after the step of detecting the thin-film transistor of the current row pixel when the brightness data of the current row pixel is less than the brightness threshold, the method further includes: modifying the undetected time of the current row pixel after detecting the thin-film transistor. Modifying the undetected time of the current row pixel after detecting its thin-film transistor allows for a reset of the timing after detection, ensuring that the next detection time of the current row pixel does not exceed a first time threshold, thus preventing excessively long undetected times of the current row pixel from affecting the display.

[0104] Specifically, for example, after detecting the thin-film transistor of the current row of pixels, the undetected time of the current row of pixels can be modified to 0, or it can be modified by using a time counter to set the time counter to 0.

[0105] Specifically, after detecting the thin-film transistors of the current row of pixels or displaying the current row of pixels normally, the system can wait for the data input of the next row of pixels, thereby detecting or displaying each row, and realizing the detection of the thin-film transistors of each pixel without affecting the display.

[0106] like Figure 2 As shown, during the display period of the display panel, the data to be displayed on the display panel will be received. At this time, the data to be displayed can be processed to obtain step S101: display data of the current row pixels, that is, the display data of the current row pixels can be obtained.

[0107] Then the display data of the current row of pixels is processed to obtain step S201: the time count of the current row of pixels;

[0108] Then, step S301 is executed: determine whether the time count of the current row pixels is greater than the first time threshold; if the time count of the current row pixels is greater than the first time threshold, i.e. Figure 2 If S301 determines that it is true, then step S701 is executed: do not display, perform detection, that is, the current row of pixels is not displayed, but the thin-film transistor detection process is performed;

[0109] When the time count of the current row pixel is less than or equal to the first time threshold, i.e. Figure 2 If S301 is incorrect, proceed to step S401: determine whether the time count of the current row pixel is greater than the second time threshold.

[0110] When the time threshold of the current row pixel is less than or equal to the second time threshold, i.e. Figure 2 If S401 determines no, proceed to step S702: normal display, that is, the current row of pixels is displayed normally;

[0111] When the time threshold of the current row pixel is greater than the second time threshold, that is Figure 2 If S401 is correct, proceed to step S501: determine the average brightness of the current row of pixels, that is, use the average brightness of the current row of pixels as the brightness data of the current row of pixels;

[0112] Then, step S601 is executed: determine whether the average brightness of the current row of pixels is less than the brightness threshold; if the average brightness of the current row of pixels is less than the brightness threshold, i.e. Figure 2 If S601 determines that the value is true, proceed to step S701: Do not display, perform detection; when the average brightness of the current pixel is greater than or equal to the brightness threshold, i.e. Figure 2 If step S601 is incorrect, proceed to step S702: normal display.

[0113] After executing step S701, step S801 will be executed: clear the time count after detection, that is, after the thin film transistor of the current row pixel is detected, the time count will be cleared to zero; after executing step S702, step S802 will be executed: increment the time count after display, that is, after the current row pixel is displayed normally, the time count will be incremented by 1.

[0114] After executing step 801 or step 802, execute step S901: display data for the next row of pixels, that is, obtain the display data for the next row of pixels, and process the next row of pixels accordingly.

[0115] This application embodiment detects the thin-film transistors (TFTs) of the current row of pixels when the undetected time of the current row of pixels exceeds a first time threshold. This avoids electrical shifts in the TFTs caused by prolonged undetection of pixels. Compared to brightness and color shifts, the display effect of momentary non-display is better. At the same time, when the brightness of the current row of pixels is less than a brightness threshold, it indicates that the brightness of the pixels in that row is too low or even not displayed. Therefore, the TFTs of the pixels in that row can be detected, which has a better impact on the display effect. In other words, this application realizes the detection of the display panel during the display time, eliminating the need to detect the display panel during the power-on and power-off time, thus shortening the power-on and power-off time and improving the display effect.

[0116] Meanwhile, this application embodiment provides a display device, the display device 1 including:

[0117] The acquisition module 11 is used to acquire the display data of the screen to be displayed on the display panel;

[0118] Processing module 12 is used to process the display data of the screen to be displayed and determine the undetected time of the current row of pixels in the display panel;

[0119] The first judgment module 13 is used to compare the undetected time of the current row pixel with the first time threshold to determine whether the undetected time of the current row pixel is greater than the first time threshold.

[0120] The first detection module 14 is used to detect the thin-film transistor of the current row pixel when the undetected time of the current row pixel is greater than a first time threshold.

[0121] The determination module 15 is used to determine the brightness data of the current row pixel when the undetected time of the current row pixel is less than or equal to a first time threshold.

[0122] The second judgment module 16 is used to compare the brightness data of the current row of pixels with the brightness threshold and determine whether the brightness data of the current row of pixels is less than the brightness threshold.

[0123] The second detection module 17 is used to detect the thin-film transistor of the current row pixel when the brightness data of the current row pixel is less than the brightness threshold.

[0124] Specifically, the first detection module and the second detection module can be the same module.

[0125] In some embodiments, the processing module 12 is used to process the display data of the screen to be displayed, determine the row number of the current row of pixels in the display panel, and determine the time count of the current row of pixels based on the row number of the current row of pixels; and determine the undetected time of the current row of pixels in the display panel based on the time count of the current row of pixels.

[0126] In some embodiments, the display device further includes a first clearing module, which is configured to clear the time count of the current row pixel after detecting the thin-film transistor of the current row pixel.

[0127] In some embodiments, the determining module 15 is configured to obtain a second time threshold when the undetected time of the current row pixel is less than or equal to a first time threshold; the second time threshold is less than the first time threshold; compare the undetected time of the current row pixel with the second time threshold to determine whether the undetected time of the current row pixel is greater than the second time threshold; and determine the brightness data of the current row pixel when the undetected time of the current row pixel is greater than the second time threshold.

[0128] In some embodiments, the display device further includes a first modification module, which is configured to enable the current row of pixels to be displayed normally when the undetected time of the current row of pixels is less than or equal to a second time threshold, and to modify the undetected time of the current row of pixels after the current row of pixels has been displayed.

[0129] In some embodiments, the determining module 15 is configured to determine the brightness of each pixel in the current row when the undetected time of the current row pixels is less than or equal to a first time threshold; determine the average brightness of the current row pixels based on the brightness of each pixel in the current row, and use the average brightness of the current row pixels as the brightness data of the current row pixels; or use the average brightness of the current row pixels and the brightness of each pixel in the current row as the brightness data of the current row pixels.

[0130] In some embodiments, the second determination module 16 is used to compare the brightness of each pixel in the current row with the first brightness threshold to determine whether the brightness of each pixel in the current row is less than the first brightness threshold; when the brightness of each pixel in the current row is less than the first brightness threshold, the average brightness of the pixels in the current row is compared with the second brightness threshold, and it is determined whether the average brightness of the pixels in the current row is less than the second brightness threshold; when there is a pixel in the current row with a brightness greater than or equal to the first brightness threshold, the pixels in the current row are displayed normally.

[0131] In some embodiments, the second detection module 17 is used to detect the thin-film transistors of the current row pixels when the average brightness of the current row pixels is less than the second brightness threshold.

[0132] In some embodiments, the display device further includes a second modification module, which is configured to enable the current row of pixels to be displayed normally when the brightness data of the current row of pixels is greater than or equal to the brightness threshold, and to modify the undetected time of the current row of pixels after the current row of pixels has been displayed.

[0133] Specifically, the first modification module and the second modification module can be the same module.

[0134] In some embodiments, the display device further includes a second clearing module, which is used to modify the undetected time of the current row pixel after detecting the thin-film transistor of the current row pixel.

[0135] Specifically, the first reset module and the second reset module can be the same module.

[0136] In some embodiments, the processing module 12 is used to process the display data of the screen to be displayed, determine the last detection time and the current time of the current row pixel in the display panel; and determine the undetected time of the current row pixel in the display panel based on the last detection time and the current time.

[0137] As can be seen from the above embodiments:

[0138] This application provides a detection method and a display device for a display panel. The detection method, after acquiring display data of the image to be displayed on the display panel, processes the display data to determine the undetected time of the current row of pixels in the display panel. Then, it compares the undetected time of each row of pixels with a first time threshold to determine whether the undetected time of each row of pixels is greater than the first time threshold. If the undetected time of the current row of pixels is greater than the first time threshold, it detects the thin-film transistors of the current row of pixels, thereby preventing brightness shift due to prolonged undetection of the current row. If the undetected time of the current row of pixels is less than or equal to the first time threshold, it determines the brightness data of the current row of pixels, then compares the brightness data of the current row of pixels with a brightness threshold to determine whether the brightness data of the current row of pixels is less than the brightness threshold. If the brightness data of the current row of pixels is less than the brightness threshold, it detects the thin-film transistors of the current row of pixels, avoiding excessive impact on the display effect caused by detecting the display panel. This application detects the thin-film transistors (TFTs) of the current row of pixels when the undetected time exceeds a first time threshold, thereby avoiding electrical shifts in the TFTs caused by prolonged undetection. Compared to brightness and color shifts, the instantaneous absence of display provides a better display effect. Furthermore, when the brightness of the current row of pixels is less than a brightness threshold, indicating that the brightness of that row of pixels is too low or even not displayed, the TFTs of that row can be detected, which has a better impact on the display effect. In other words, this application achieves detection of the display panel during the display time, eliminating the need for detection during the power-on / off time of the display panel, thus shortening the power-on / off time and improving the display effect.

[0139] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0140] The detection method and display device for a display panel provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A method for detecting a display panel, characterized in that, include: Obtain the display data of the screen to be displayed on the display panel; The display data of the screen to be displayed is processed to determine the undetected time of the current row of pixels in the display panel; The undetected time of the current row pixel includes the number of frames in which the current row pixel was not detected; The undetected time of the current row pixel is compared with a first time threshold to determine whether the undetected time of the current row pixel is greater than the first time threshold; if the undetected time of the current row pixel is greater than the first time threshold, the thin film transistor of the current row pixel is detected. When the undetected time of the current row pixel is less than or equal to the first time threshold, the brightness data of the current row pixel is determined; Compare the brightness data of the current row of pixels with a brightness threshold to determine whether the brightness data of the current row of pixels is less than the brightness threshold; When the brightness data of the current row pixel is less than the brightness threshold, the thin-film transistor of the current row pixel is detected.

2. The detection method for a display panel as described in claim 1, characterized in that, The step of processing the display data of the image to be displayed and determining the undetected time of the current row of pixels in the display panel includes: The display data of the screen to be displayed is processed to determine the row number of the current row of pixels in the display panel, and the time count of the current row of pixels is determined based on the row number of the current row of pixels. The undetected time of the current row of pixels in the display panel is determined based on the time count of the current row of pixels.

3. The detection method for a display panel as described in claim 2, characterized in that, After the step of detecting the thin-film transistor of the current row pixel when the undetected time of the current row pixel is greater than the first time threshold, the method further includes: After detecting the thin-film transistor of the current row pixel, the time count of the current row pixel is cleared to zero.

4. The detection method for a display panel as described in claim 1, characterized in that, The step of determining the brightness data of the current row pixel when the undetected time of the current row pixel is less than or equal to the first time threshold includes: When the undetected time of the current row pixel is less than or equal to the first time threshold, a second time threshold is obtained; the second time threshold is less than the first time threshold. Compare the undetected time of the current row pixel with the second time threshold to determine whether the undetected time of the current row pixel is greater than the second time threshold; When the undetected time of the current row pixel is greater than the second time threshold, the brightness data of the current row pixel is determined.

5. The detection method for a display panel as described in claim 4, characterized in that, After the step of comparing the undetected time of the current row pixels with the second time threshold to determine whether the undetected time of the current row pixels is greater than the second time threshold, the method further includes: When the undetected time of the current row pixel is less than or equal to the second time threshold, the current row pixel is displayed normally, and after the current row pixel is displayed, the undetected time of the current row pixel is modified.

6. The detection method for a display panel as described in claim 1, characterized in that, The step of determining the brightness data of the current row pixel when the undetected time of the current row pixel is less than or equal to the first time threshold includes: When the undetected time of the current row of pixels is less than or equal to the first time threshold, the brightness of each pixel in the current row is determined; The average brightness of the pixels in the current row is determined based on the brightness of each pixel in the current row, and the average brightness of the pixels in the current row is used as the brightness data of the pixels in the current row; or the average brightness of the pixels in the current row and the brightness of each pixel in the current row are used as the brightness data of the pixels in the current row.

7. The method for detecting a display panel as described in claim 6, characterized in that, The brightness threshold includes a first brightness threshold and a second brightness threshold. When the average brightness of the current row of pixels and the brightness of each pixel in the current row are used as the brightness data of the current row of pixels, the step of comparing the brightness data of the current row of pixels with the brightness threshold to determine whether the brightness data of the current row of pixels is less than the brightness threshold includes: Compare the brightness of each pixel in the current row with the first brightness threshold to determine whether the brightness of each pixel in the current row is less than the first brightness threshold. If there is a pixel in the current row whose brightness is greater than or equal to the first brightness threshold, the current row of pixels will be displayed normally. When the brightness of each pixel in the current row is less than the first brightness threshold, the average brightness of the pixels in the current row is compared with the second brightness threshold, and it is determined whether the average brightness of the pixels in the current row is less than the second brightness threshold. When the average brightness of the pixels in the current row is less than the second brightness threshold, the thin-film transistors of the pixels in the current row are detected.

8. The detection method for a display panel as described in claim 6, characterized in that, When the average brightness of the current row of pixels is used as the brightness data of the current row of pixels, the step of detecting the thin-film transistor of the current row of pixels when the brightness data of the current row of pixels is less than the brightness threshold includes: When the average brightness of the current row of pixels is less than the brightness threshold, the thin-film transistor of the current row of pixels is detected.

9. The detection method for a display panel as described in claim 1, characterized in that, After comparing the brightness data of the current row of pixels with a brightness threshold to determine whether the brightness data of the current row of pixels is less than the brightness threshold, the method further includes: When the brightness data of the current row of pixels is greater than or equal to the brightness threshold, the current row of pixels is displayed normally, and after the current row of pixels is displayed, the undetected time of the current row of pixels is modified.

10. The detection method for a display panel as described in claim 1, characterized in that, After the step of detecting the thin-film transistor of the current row pixel when the brightness data of the current row pixel is less than the brightness threshold, the method further includes: After detecting the thin-film transistors of the current row of pixels, the undetected time of the current row of pixels is modified.

11. The detection method for a display panel as described in claim 1, characterized in that, The step of processing the display data of the image to be displayed and determining the undetected time of the current row of pixels in the display panel includes: The display data of the screen to be displayed is processed to determine the last detection time and the current time of the current row pixel in the display panel; The undetected time of the current row pixel in the display panel is determined based on the last detection time of the current row pixel and the current time.

12. A display device, characterized in that, include: The acquisition module is used to acquire the display data of the screen to be displayed on the display panel; The processing module is used to process the display data of the screen to be displayed and determine the undetected time of the current row of pixels in the display panel; The undetected time of the current row pixel includes the number of frames in which the current row pixel was not detected; The first judgment module is used to compare the undetected time of the current row pixel with a first time threshold to determine whether the undetected time of the current row pixel is greater than the first time threshold. The first detection module is used to detect the thin-film transistor of the current row pixel when the undetected time of the current row pixel is greater than the first time threshold. The determination module is used to determine the brightness data of the current row pixel when the undetected time of the current row pixel is less than or equal to the first time threshold; The second judgment module is used to compare the brightness data of the current row of pixels with a brightness threshold to determine whether the brightness data of the current row of pixels is less than the brightness threshold. The second detection module is used to detect the thin-film transistor of the current row pixel when the brightness data of the current row pixel is less than the brightness threshold.

Images