Display screen precharging method and device, and display device

Abstract

The present application discloses a pre-charging method and device for a display screen, and a display device. The pre-charging method for the display screen includes: determining a pre-charging area in the display screen based on the driving voltage of each pixel in the display screen; determining a target grayscale value of a target pixel in the pre-charging area; adjusting the original grayscale value of the target pixel to the target grayscale value to obtain a pre-charged display screen. The embodiment of the present application implements local pre-charging compensation processing for the display screen, which can reduce the local drive load, occupy a smaller register, and reduce or eliminate in real time the horizontal crosstalk problem caused by insufficient working voltage drive of the display device, so as to avoid the appearance of single or multiple abnormal dark lines in the display screen.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a method and device for pre-charging a display screen, and a display device. Background Art

[0002] As the specifications of display panels increase, when there are large grayscale value jumps in the pixels of the displayed image, factors such as liquid crystal leakage, insufficient VDD drive, and capacitive coupling will cause the driving voltage at both ends of the liquid crystal to fluctuate, resulting in horizontal light and dark lines when the image is displayed, affecting the display effect. Summary of the Invention

[0003] The embodiments of the present application provide a pre-charging method and device for a display screen, and a display device, which can implement local pre-charging compensation processing for the display screen, reduce local drive loading, occupy smaller registers, and reduce or eliminate in real time the horizontal crosstalk problem caused by insufficient working voltage drive of the display device, so as to avoid the appearance of single or multiple abnormal dark lines in the display screen.

[0004] The present invention provides a method for precharging a display screen, including:

[0005] Determining a pre-charge area in the display image based on a driving voltage of each pixel in the display image; wherein each pre-charge area includes a plurality of pixels located in the same row, and a voltage difference between the driving voltage of the pixels in the pre-charge area and the driving voltage of the pixels in the previous row satisfies a preset condition;

[0006] Determining a target grayscale value of a target pixel in the pre-charge area; wherein the target pixel refers to the pixel in the pre-charge area whose grayscale value needs to be adjusted;

[0007] The original grayscale value of the target pixel is adjusted to the target grayscale value to obtain the pre-charged display image.

[0008] Accordingly, an embodiment of the present application provides a pre-charging device for displaying a screen, comprising:

[0009] a first determining module, configured to determine a pre-charge area in the display image based on a driving voltage of each pixel in the display image; wherein each pre-charge area includes a plurality of pixels located in the same row, and a voltage difference between the driving voltage of the pixels in the pre-charge area and the driving voltage of the pixels in the previous row satisfies a preset condition;

[0010] A second determining module is configured to determine a target grayscale value of a target pixel in the pre-filled area; wherein the target pixel is a pixel in the pre-filled area whose grayscale value needs to be adjusted;

[0011] The pre-charging module is used to adjust the original grayscale value of the target pixel to the target grayscale value to obtain the display image after pre-charging.

[0012] Accordingly, an embodiment of the present application provides a display device, comprising: a display panel, and a pre-charging device for the above-mentioned display screen.

[0013] The beneficial effects provided by the embodiments of the present application include at least:

[0014] Based on the driving voltage of each pixel in the display image, a pre-charge area in the display image is determined; a target pixel in the pre-charge area and a target grayscale value of the target pixel are then determined; and the original grayscale value of the target pixel is then adjusted to the target grayscale value to obtain a pre-charged display image. Because the voltage difference between the driving voltage of the pixels in the pre-charge area and the driving voltage of the pixels in the previous row meets a preset condition, the embodiment of the present application determines the pre-charge area and pre-charges the pixels in the pre-charge area to achieve local pre-charge compensation processing for the display image. This can reduce the local drive load, occupy a smaller register, and in real time reduce or eliminate horizontal crosstalk caused by insufficient operating voltage drive of the display device, thereby avoiding the appearance of single or multiple abnormal dark lines in the display image. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of a method for precharging a display screen provided in an embodiment of the present application;

[0016] Figure 2 is a schematic diagram of a pre-charge area provided in an embodiment of the present application;

[0017] Figure 3 2 is a comparative diagram of continuous pre-charging and discontinuous pre-charging provided in an embodiment of the present application;

[0018] Figure 4 Schematic diagram of a numerical mapping of a pre-charge mode provided in an embodiment of the present application;

[0019] Figure 5 is a schematic diagram of a mode mapping table provided in an embodiment of the present application;

[0020] Figure 6 is a schematic diagram of a first coefficient mapping table provided in an embodiment of the present application;

[0021] Figure 7 is a schematic diagram of a correction coefficient provided in an embodiment of the present application;

[0022] Figure 8 is a schematic diagram of a second coefficient mapping table provided in an embodiment of the present application;

[0023] Figure 92 is a comparative schematic diagram of a pre-charging mode provided in an embodiment of the present application;

[0024] Figure 10 is a schematic diagram of a first voltage mapping table provided in an embodiment of the present application;

[0025] Figure 11 is a schematic diagram of a second voltage mapping table provided in an embodiment of the present application;

[0026] Figure 12 This is a block diagram of a pre-charging device for a display screen provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] The following will describe the technical solutions in the embodiments of the present application in conjunction with the accompanying drawings. The described technical solutions are only used to explain and illustrate the concept of the present application and should not be regarded as limiting the scope of protection of the present application.

[0028] In addition, the term "a plurality of" in the embodiments of the present application refers to two or more. The terms "first" and "second" in the embodiments of the present application are used to distinguish different technical features, and do not indicate any order, quantity or importance.

[0029] The various embodiments provided in this application are similar, and features in different embodiments may be combined with each other.

[0030] The order in which the following embodiments are described is not intended to limit the preferred order of the embodiments.

[0031] See also Figure 1 , Figure 1 This is a flow chart of a method for pre-charging a display screen provided in an embodiment of the present application. The pre-charging method may include the following steps:

[0032] Step 110: determining a pre-charge area in the display image according to the driving voltage of each pixel in the display image;

[0033] Step 120: Determine a target grayscale value of a target pixel in the pre-charge area;

[0034] Step 130: Adjust the original grayscale value of the target pixel to the target grayscale value to obtain a pre-charged display image.

[0035] In the embodiment of the present application, a display image to be displayed and a driving voltage of each pixel in the display image can be obtained. Optionally, the driving voltage of the pixel can be obtained directly, or other parameters of the pixel can be obtained first and then quantified based on the other parameters. This embodiment of the present application is not limited to this. For example, the grayscale value of each pixel in the display image can be obtained first, and then the grayscale value of each pixel can be converted into the driving voltage of the pixel.

[0036] Taking the example of quantizing the driving voltage of a pixel according to the grayscale value of the pixel, optionally, the above step 110 further includes the following steps:

[0037] Step 011: Obtain the display image and the original grayscale value of each pixel in the display image;

[0038] Step 012: Determine the drive type of the display screen;

[0039] Step 013: If the driving type is positive frame driving, determining the driving voltage of each pixel according to the original grayscale value of each pixel and a preset first voltage mapping table;

[0040] Step 014: If the driving type is negative frame driving, the driving voltage of each pixel is determined according to the original grayscale value of each pixel and a preset second voltage mapping table.

[0041] Positive frame drive drives pixels with a positive polarity voltage. A positive polarity voltage refers to a driving voltage with a voltage value greater than the common voltage. It can make the liquid crystal molecules arrange in a specific direction, thereby controlling the passage of light to form an image, thereby achieving the purpose of screen display. Negative frame drive drives pixels with a negative polarity voltage. A negative polarity voltage refers to a driving voltage with a voltage value less than the common voltage. The arrangement direction of the liquid crystal molecules during negative frame drive is opposite to that during positive frame drive. It can also control the passage of light to form an image, thereby achieving the purpose of screen display. In actual applications, in order to reduce the polarization and afterimage phenomenon of liquid crystal molecules caused by applying the same polarity voltage for a long time, a frame alternating drive method is usually adopted, that is, the positive frame and the negative frame are driven alternately. This method can effectively reduce the polarization of liquid crystal molecules, extend the service life of the display device, and improve the display quality.

[0042] Because the rebound speed and voltage drop of positive frame driving and negative frame driving are slightly different, the embodiment of the present application pre-establishes voltage mapping tables corresponding to the two driving types, namely the first voltage mapping table and the second voltage mapping table. The first voltage mapping table includes the mapping relationship between the original grayscale value and the driving voltage in the case of positive frame driving, such as Figure 10 The second voltage mapping table includes a mapping relationship between the original grayscale value and the driving voltage in the case of negative frame driving, as shown in FIG. Figure 11 When obtaining the driving voltage of each pixel in the display screen, the driving type of the display screen is first determined, and then the corresponding voltage mapping table is obtained according to the driving type, so as to further determine the driving voltage corresponding to the original grayscale value of the pixel from the obtained voltage mapping table.

[0043] In step 110, the embodiment of the present application determines the pre-charge area in the display screen based on the driving voltage of each pixel in the display screen. Each pre-charge area includes a plurality of pixels located in the same row, and the voltage difference between the driving voltage of the pixels in the pre-charge area and the driving voltage of the pixels in the previous row meets a preset condition. Optionally, the pre-charge area may include all pixels located in the same row of the display screen, or may include some pixels in the same row of the display screen. Optionally, the preset condition may be that the voltage difference between the driving voltage of each pixel in the pre-charge area and the driving voltage of the corresponding pixel in the previous row is greater than a first threshold, or the sum of the voltage differences between the driving voltages of all pixels in the pre-charge area and the driving voltages of the corresponding pixels in the previous row is greater than a second threshold. Each pixel and the corresponding pixel in the previous row of the pixel are located in the same column of the display screen. For other descriptions of the method for determining the pre-charge area, please refer to the following embodiments, which will not be elaborated here.

[0044] In step 120, an embodiment of the present application determines the target grayscale value of the target pixel in the pre-charge area. The target pixel refers to the pixel in the pre-charge area whose grayscale value needs to be adjusted. The pre-charge area includes one or more target pixels. Optionally, all pixels in the pre-charge area are target pixels; or, some pixels in the pre-charge area are target pixels. An embodiment of the present application can first determine the target pixels in the pre-charge area, and then determine the target grayscale value of each target pixel. The target grayscale value refers to the grayscale value of the target pixel after pre-charging, that is, the grayscale value to which the target pixel needs to be adjusted.

[0045] The embodiments of the present application do not limit the method for determining the target grayscale value of the target pixel. Optionally, a grayscale value mapping table can be pre-established, which includes a mapping relationship between the original grayscale value and the target grayscale value. The target grayscale value of the target pixel can be obtained from the grayscale value mapping table based on the original grayscale value of the target pixel; or a pre-charge coefficient of the target pixel can be determined, and the target grayscale value of the target pixel can be determined based on the original grayscale value of the target pixel and the pre-charge coefficient. For other descriptions of the method for determining the target pixel and the method for calculating the target grayscale value, please refer to the following embodiments, which will not be elaborated here.

[0046] In step 130 , the embodiment of the present application adjusts the original grayscale value of the target pixel to the target grayscale value to obtain a pre-charged display image, and then the display device can drive the pre-charged display image to be displayed on the display panel.

[0047] In summary, the pre-charging method for a display screen provided in the embodiment of the present application determines a pre-charging area in the display screen according to the driving voltage of each pixel in the display screen; then determines the target pixel in the pre-charging area, and the target grayscale value of the target pixel; and then adjusts the original grayscale value of the target pixel to the target grayscale value to obtain the pre-charged display screen. Since the voltage difference between the driving voltage of the pixel in the pre-charging area and the driving voltage of the pixel in the previous row meets the preset conditions, the embodiment of the present application determines the pre-charging area and pre-charges the pixels in the pre-charging area to achieve local pre-charging compensation processing for the display screen, which can reduce the local drive load, occupy a smaller register, and reduce or eliminate the horizontal crosstalk problem caused by insufficient driving of the working voltage (such as VDD, etc.) of the display device in real time, so as to avoid the appearance of single or multiple abnormal dark lines in the display screen.

[0048] Furthermore, the embodiment of the present application determines the pixel's driving voltage based on the pixel's grayscale value from a preset voltage mapping table. The preset voltage mapping table is used to convert the pixel's grayscale value into a driving voltage to further quantify the amount of crosstalk. The embodiment of the present application also presets different voltage mapping tables for positive frame driving and negative frame driving, so that the corresponding voltage mapping table is obtained based on the drive type of the display screen. Because the voltage mapping table matches the drive type of the display screen, a more accurate driving voltage can be obtained based on the voltage mapping table, thereby accurately quantifying the amount of crosstalk.

[0049] Next, a method for determining the pre-charge area is described.

[0050] In one example, step 110 includes the following sub-steps:

[0051] Step 111: determining a transition sub-region in the display image according to the driving voltage of each pixel in the display image;

[0052] Step 112: Use the transition sub-region and the sub-region in the same row of the transition sub-region as the pre-charge region in the display image.

[0053] Each transition sub-region includes multiple pixels located in the same row, and the voltage difference between the drive voltage of the pixels in the transition sub-region and the drive voltage of the pixels in the previous row meets a preset condition. The same row sub-region and the transition sub-region are located in the same row of the display screen, but the voltage difference between the drive voltage of the pixels in the same row sub-region and the drive voltage of the pixels in the previous row does not meet the preset condition. That is, the pre-charge region in the embodiment of the present application includes the transition sub-region and the same row sub-region located in the same row as the transition sub-region.

[0054] In the embodiment of the present application, the display screen can be divided into multiple sub-areas, and then each sub-area is determined to be a transition sub-area. If a transition sub-area exists in a row of the display screen, the other sub-areas in the row serve as the same row sub-areas of the transition sub-area, and together they constitute the pre-charge area of ​​the display screen.

[0055] Taking the determination of the transition sub-region based on the source driving sub-region as an example, optionally, the above step 111 includes the following sub-steps:

[0056] Step 1111: determining the total voltage jump of each source driving sub-region in the display image according to the driving voltage of each pixel in the display image;

[0057] Step 1112: If the total voltage jump amount of the source driver sub-region is greater than a preset threshold, the source driver sub-region is used as a jump sub-region.

[0058] In an embodiment of the present application, the display device can provide a driving voltage for pixels through a source driver integrated circuit (Source IC). The number of data channels of the source driver integrated circuit refers to the number of channels on the source driver integrated circuit for transmitting data signals, and each channel can provide data for a certain number of pixels. Since the number of channels of a source driver integrated circuit is limited, a display device is usually driven by multiple source driver integrated circuits, such as the number of source driver integrated circuits ranging from 4 to 24. Optionally, the number of source driver integrated circuits is related to the lateral resolution of the display device and the number of channels of a single source driver integrated circuit. For example, the number of source driver integrated circuits = lateral resolution of the display device × 3 / number of channels of the source driver integrated circuit.

[0059] For example, if the resolution of the display device is 3840×2160 and the horizontal resolution is 3840, a total of 11520 (3840×3) channels are used; if a single source driver integrated circuit can drive 960 channels, the display device needs to be driven by 12 source driver integrated circuits; among them, the data (i.e., channel) index value of the first source driver integrated circuit is 1 to 960, the data index value of the second source driver integrated circuit is 961 to 1920, and the data index values ​​corresponding to the remaining source driver integrated circuits are similar.

[0060] The range of channels driven by a single source driver integrated circuit is called a source driver region. A source driver region may include multiple rows of a display screen. In this embodiment of the application, a row within a source driver region is referred to as a source driver sub-region. In other words, each source driver sub-region includes multiple pixels located in the same row, and each source driver sub-region is driven by a source driver integrated circuit.

[0061] For each source driver sub-region, the total voltage jump of the source driver sub-region is calculated. The total voltage jump refers to the sum of the voltage differences between the driving voltage of the pixels in the source driver sub-region and the driving voltage of the pixels in the previous row.

[0062] For example, for a conventional architecture, the calculation formula for the total voltage jump of each source driver sub-region is as follows:

[0063]

[0064] For example, for a flip-chip architecture, the calculation formula for the total voltage jump of each source driver sub-region is as follows:

[0065]

[0066] Among them, in the above two calculation formulas, is the t-th source driver sub-region of the i-th row in the display screen; P (i,j) is the driving voltage of the jth pixel in the tth source driver sub-region, P (i-1,j) is the driving voltage of the jth pixel in the i-1th row; a t1 is the first pixel in the tth source driver sub-region, a tn It is the last pixel in the tth source driver sub-region.

[0067] The pre-charge region must meet preset conditions, including the total voltage jump of the source driver sub-region being greater than a preset threshold. Specifically, if the total voltage jump of the source driver sub-region is greater than the preset threshold, the source driver sub-region is designated as a transition sub-region. If a transition sub-region exists in a row of the display image, the remaining source driver sub-regions in the display image are designated as sub-regions in the same row of the transition sub-region. The transition sub-region and its sub-regions in the same row together constitute the pre-charge region.

[0068] For example, Figure 2 As shown, the i+1th row of the display screen includes a jump sub-region, and the total voltage jump amount of the jump sub-region is greater than the preset threshold; Figure 2 As shown, although the total amount of voltage jumps in other areas of the i+1th row is not greater than the preset threshold, since there is a jump sub-area in the i+1th row, the other areas except the jump sub-area of ​​the i+1th row are regarded as the same row sub-areas, and the pre-charge area includes the jump sub-area and the same row sub-area of ​​the jump sub-area.

[0069] In summary, the pre-charging method for a display screen provided in the embodiments of the present application uses the source driver sub-region with the largest total voltage jump as the jump sub-region, and uses the jump sub-region and the sub-region in the same row of the jump sub-region as the pre-charging region. By pre-charging the pixels in the jump sub-region, the jump amount of the driving voltage can be reduced, thereby reducing the operating voltage drop caused by the surge in the load. Since the operating voltage drop usually lasts for an entire row, by pre-charging the pixels in the sub-region in the same row of the jump sub-region, the impact of the voltage drop can be reduced.

[0070] The following describes how to determine the target pixel and how to calculate the target grayscale value.

[0071] In one example, step 120 includes the following sub-steps:

[0072] Step 121: Determine the panel partition where the pre-charge area is located in the display panel;

[0073] Step 122: Determine the pre-charging mode of each pre-charging sub-region according to the panel partition where each pre-charging sub-region is located and a preset mode mapping table;

[0074] Step 123: For each pre-fill sub-region, determine a target grayscale value of a target pixel in the pre-fill sub-region according to the pre-fill mode of the pre-fill sub-region.

[0075] Among them, the display panel includes multiple panel partitions. The embodiment of the present application does not limit the division method of the panel partitions. Optionally, the display panel of the display device includes A×B panel partitions, A refers to the number of horizontal panel partitions, and B refers to the number of vertical panel partitions. A and B can be the same positive integer or different positive integers.

[0076] A pre-charge region includes at least one pre-charge sub-region, and different pre-charge sub-regions are located in different panel partitions. As can be seen from the above embodiments, the pre-charge region includes a transition sub-region, or includes a transition sub-region and a sub-region in the same row of the transition sub-region. Therefore, the pre-charge sub-region in the pre-charge region may include only the transition sub-region, or may include the transition sub-region and a sub-region in the same row of the transition sub-region.

[0077] The present embodiment of the present application includes a preset mode mapping table. The mode mapping table includes a corresponding pre-charge mode for each panel partition. Specifically, the mode mapping table includes a mapping relationship between panel partitions and pre-charge modes. Based on the panel partition in which each pre-charge sub-region resides, the pre-charge mode for that pre-charge sub-region can be retrieved from the mode mapping table.

[0078] The embodiment of the present application does not limit the specific type of pre-fill mode. Optionally, the pre-fill mode includes continuous pre-fill or discontinuous pre-fill; or the pre-fill mode includes pre-filling the same line sub-region or pre-filling only the jump sub-region. Taking the example of the pre-fill sub-region including the jump sub-region and / or the same line sub-region, the pre-fill mode includes the first pre-fill mode, the second pre-fill mode, the third pre-fill mode or the fourth pre-fill mode; wherein,

[0079] In the first pre-charging mode, pixels in the transition sub-region and the in-line sub-region are pre-charged, and pixels in the pre-charging sub-region are pre-charged continuously;

[0080] In the second pre-charging mode, pixels in the transition sub-region and the in-line sub-region are pre-charged, and pixels in the pre-charging sub-region are pre-charged discontinuously;

[0081] In the third pre-charging mode, only the pixels in the toggle sub-region are pre-charged, and the pixels in the toggle sub-region are pre-charged continuously;

[0082] In the fourth pre-charging mode, only the pixels in the toggle sub-region are pre-charged, and the pixels in the toggle sub-region are pre-charged discontinuously.

[0083] Continuous pre-charging and discontinuous pre-charging refer to the spatial connectivity of the pre-charged pixels. Continuous pre-charging means that each pixel in the corresponding sub-region is pre-charged, while discontinuous pre-charging means that multiple groups of pixels in the corresponding sub-region are pre-charged, each group of pixels includes C pixels, and there is a gap of D pixels between two adjacent groups of pixels. C and D can be positive integers with the same or different values. For example, Figure 3 As shown, for continuous pre-charging, each pixel in the corresponding sub-region is pre-charged; while for discontinuous pre-charging, multiple groups of pixels in the corresponding sub-region are pre-charged, each group of pixels includes 3 pixels, and there is a gap of 3 pixels between two adjacent groups of pixels.

[0084] For example, Figure 9 As shown, Figure 9 (a) is the grayscale value of some pixels in the display before pre-charging. Figure 9 (c) is the grayscale value of some pixels in the display panel after being pre-charged using the first pre-charging mode. Figure 9 (b) is the grayscale value of some pixels in the display panel after being pre-charged using the second pre-charging mode. Figure 9 (e) is the grayscale value of some pixels in the display panel after being pre-charged using the third pre-charging mode. Figure 9 Middle (d) is the grayscale value of some pixels in the display panel after being pre-charged using the fourth pre-charging mode.

[0085] In order to facilitate the display device to read the pre-charge mode, the embodiment of the present application can use different numerical values ​​to represent different pre-charge modes. Figure 4 As shown, the first pre-filling mode is represented by a value of 0, the second pre-filling mode is represented by a value of 1, the third pre-filling mode is represented by a value of 2, and the fourth pre-filling mode is represented by a value of 3. Figure 4 The mapping relationship between the pre-charge mode and the value shown in the figure is as follows: Figure 5 The mode mapping table shown in FIG. 1 obtains the value corresponding to the panel partition to determine the pre-charge mode of the panel partition. Figure 5 As shown, for the second horizontal and sixth vertical panel partition in the display panel, the value 3 is obtained, indicating that the pre-charging mode of the panel partition is the fourth pre-charging mode; for the fourth horizontal and third vertical panel partition in the display panel, the value 2 is obtained, indicating that the pre-charging mode of the panel partition is the third pre-charging mode.

[0086] In the above step 123, the target grayscale value of the target pixel in each pre-filled sub-region is determined according to the pre-filling mode in the pre-filled sub-region. Optionally, the above step 123 includes the following sub-steps:

[0087] Step 1231: for each pre-fill sub-region, determine a target pixel in the pre-fill sub-region according to a pre-fill mode of the pre-fill sub-region;

[0088] Step 1232: Determine the pre-fill coefficient of the target pixel;

[0089] Step 1233: Determine the target grayscale value of the target pixel according to the original grayscale value of the target pixel and the pre-charge coefficient.

[0090] The pre-fill coefficient of the target pixel refers to the adjustment coefficient for the grayscale value of the target pixel. Optionally, the pre-fill coefficient can be determined based on the original grayscale value of the target pixel and / or the total voltage jump of the source driver sub-region where the target pixel is located. Optionally, the above step 1232 includes the following sub-steps:

[0091] Step 12321: determining a first pre-charge coefficient of the target pixel according to the total voltage jump amount of the source driving sub-region where the target pixel is located and a preset first coefficient mapping table;

[0092] Step 12322: Determine the second pre-fill coefficient of the target pixel according to the original grayscale value of the target pixel and a preset second coefficient mapping table.

[0093] The first coefficient mapping table includes a mapping relationship between the total voltage jump amount and the first pre-fill coefficient; the second coefficient mapping table includes a mapping relationship between the original grayscale value and the second pre-fill coefficient. Optionally, the larger the total voltage jump amount, the larger the first pre-fill coefficient corresponding to the total voltage jump amount; the larger the original grayscale value, the larger the second pre-fill coefficient corresponding to the original grayscale value.

[0094] Optionally, the first coefficient mapping table includes all possible voltage jump total amounts, so that the first pre-fill coefficient of the target pixel can be directly obtained from the first coefficient mapping table based on the voltage jump total amount of the source driver sub-region where the target pixel is located; or, the first coefficient mapping table includes multiple voltage jump total amount binding points, so that based on the voltage jump total amount of the source driver sub-region where the target pixel is located, two voltage jump total amount binding points adjacent to the voltage jump total amount can be first obtained from the first coefficient mapping table, and then the first pre-fill coefficient corresponding to these two voltage jump total amount binding points can be determined.

[0095] For example, the first coefficient mapping table includes a mapping relationship between a plurality of voltage jump total amount binding points and the first pre-charge coefficient, such as Figure 6 As shown, multiple voltage jump total amount binding points include 0, 80, 160, 240, 320, 400, 480, and 560. If the voltage jump total amount of the source driver sub-region where the target pixel is located is not a binding point in the first coefficient mapping table, then the two voltage jump total amount binding points adjacent to the voltage jump total amount are obtained from the first coefficient mapping table. The first pre-fill coefficient of the target pixel can be obtained by linearly interpolating the first pre-fill coefficients corresponding to the two adjacent voltage jump total amount binding points. For example, the calculation formula of the first pre-fill coefficient of the target pixel is as follows:

[0096]

[0097] Where WD is the first pre-fill coefficient of the target pixel; P H1 is the voltage jump amount binding point adjacent to the voltage jump amount corresponding to the target pixel in the first coefficient mapping table, and P H1 Greater than the total voltage jump corresponding to the target pixel; P L1 is the voltage jump total amount binding point adjacent to the voltage jump total amount corresponding to the target pixel in the first coefficient mapping table, and P L1 Greater than the total voltage jump corresponding to the target pixel; ΔV S is the total voltage jump corresponding to the target pixel, and the total voltage jump corresponding to the target pixel is the total voltage jump of the source driver sub-region where the target pixel is located; WD H The voltage jump total binding point P H1 The corresponding first pre-charge coefficient; WD L The voltage jump total binding point P L1 The corresponding first pre-charge coefficient; b refers to the correction coefficient of the source driver sub-region where the target pixel is located. The correction coefficients of different source driver sub-regions are different. For example, the source driver sub-region is related to the source driver integrated circuit corresponding to the source driver sub-region. Different source driver integrated circuits can correspond to the same or different correction coefficients, such as Figure 7 shown.

[0098] Similarly, optionally, the second coefficient mapping table includes all possible original grayscale values, so that according to the original grayscale value of the target pixel, the second pre-fill coefficient of the target pixel can be directly obtained from the second coefficient mapping table; or, the second coefficient mapping table includes multiple original grayscale value binding points, so that according to the original grayscale value of the target pixel, two original grayscale value binding points adjacent to the original grayscale value can be first obtained from the second coefficient mapping table, and then the second pre-fill coefficient corresponding to these two original grayscale value binding points can be determined.

[0099] Exemplarily, the second coefficient mapping table includes a mapping relationship between a plurality of original grayscale value binding points and the second pre-fill coefficients, such as Figure 8 As shown, multiple original grayscale value binding points include 0, 128, 256, 384, 512, 640, 768, 896, and 1024. If the original grayscale value of the target pixel is not a binding point in the second coefficient mapping table, two original grayscale value binding points adjacent to the original grayscale value are obtained from the second coefficient mapping table. The second pre-fill coefficient of the target pixel can be obtained by linearly interpolating the second pre-fill coefficients corresponding to the two adjacent original grayscale value binding points. For example, the calculation formula of the second pre-fill coefficient of the target pixel is as follows:

[0100]

[0101] Wherein, WG is the second pre-fill coefficient of the target pixel; P H2 is a grayscale value binding point in the second coefficient mapping table that is close to the original grayscale value of the target pixel, and P H2 Greater than the original grayscale value of the target pixel; P L2 is a grayscale value binding point in the second coefficient mapping table that is close to the original grayscale value of the target pixel, and P L2 Gray is the original grayscale value of the target pixel; WG is the original grayscale value of the target pixel. H is the grayscale value binding point P H2 The corresponding second pre-charge coefficient; WG L is the grayscale value binding point P L2 The corresponding second pre-charge coefficient.

[0102] In step 1233, a target grayscale value of the target pixel can be determined based on the original grayscale value of the target pixel and the pre-fill coefficient. The specific method for calculating the target grayscale value is not limited in this embodiment of the present application. Optionally, the target grayscale value can be obtained by multiplying the original grayscale value by the pre-fill coefficient; or, the target grayscale value can be obtained by multiplying the original grayscale value by the pre-fill coefficient to obtain a grayscale adjustment value, and then the target grayscale value can be obtained by summing or subtracting the original grayscale value and the grayscale adjustment value.

[0103] Optionally, the above step 1233 includes the following sub-steps:

[0104] Step 12331: Determine the grayscale adjustment value of the target pixel according to the original grayscale value of the target pixel and the pre-charge coefficient;

[0105] Step 12332: if the target pixel is located in the transition sub-region of the pre-charge region, subtract the grayscale adjustment value from the original grayscale value of the target pixel to obtain the target grayscale value of the target pixel;

[0106] Step 12333: If the target pixel is located in the same row sub-region of the pre-charge region, the grayscale adjustment value is added to the original grayscale value of the target pixel to obtain the target grayscale value of the target pixel.

[0107] As can be seen from the above embodiment, the pre-fill coefficient of the target pixel may include a first pre-fill coefficient and a second pre-fill coefficient, the first pre-fill coefficient corresponding to the total voltage jump, and the second pre-fill coefficient corresponding to the original grayscale value. If the pre-fill coefficient of the target pixel includes the first pre-fill coefficient and the second pre-fill coefficient, then the grayscale adjustment value of the target pixel is calculated based on the original grayscale value of the target pixel and the first pre-fill coefficient and the second pre-fill coefficient, for example, by multiplying the three.

[0108] In order to improve the accuracy of pre-charging, the embodiments of the present application adopt different methods to calculate the target grayscale value for different sub-regions where the target pixel is located. If the target pixel is located in the transition sub-region of the pre-charging region, since the transition sub-region is a sub-region with a large voltage jump, in order to reduce the operating voltage (such as VDD) drop caused by the surge in the pumping amount, the grayscale adjustment value is reduced on the basis of the original grayscale value of the target pixel to obtain the target grayscale value. If the target pixel is located in the same row sub-region of the pre-charging region, although the same row sub-region itself does not have a surge in the pumping amount, the transition sub-region corresponding to the same row sub-region has a surge in the pumping amount, and the operating voltage (such as VDD) drop usually lasts for an entire row, so the grayscale adjustment value is added on the basis of the original grayscale value of the target pixel to obtain the target grayscale value.

[0109] For example, if the target pixel is located in the transition sub-region, the target grayscale value of the target pixel is calculated as follows:

[0110]

[0111] For example, if the target pixel is located in the same row sub-region, the target grayscale value of the target pixel is calculated as follows:

[0112]

[0113] Among them, in the above two calculation formulas, Gray 预充Gray is the target grayscale value of the target pixel; 原始 is the original grayscale value of the target pixel; WD is the first pre-fill coefficient of the target pixel; WG is the second pre-fill coefficient of the target pixel; d is the maximum grayscale value of the pixel.

[0114] In summary, the pre-charging method for a display screen provided in an embodiment of the present application presets different pre-charging modes for different panel partitions of a display panel, determines the pre-charging mode of each pre-charging sub-region based on the panel partition corresponding to the pre-charging sub-region in the pre-charging region, and then pre-charges the pixels in the pre-charging sub-region based on the pre-charging mode. Since the driving capabilities of different panel partitions in a display panel are different, by dividing the panel partitions and pre-charging each panel partition with a corresponding pre-charging mode, the pre-charging mode can be matched with the driving capability of the panel partition, thereby improving the pre-charging effect of the display screen.

[0115] In order to facilitate better implementation of the pre-charging method for display screen provided in the embodiment of the present application, the embodiment of the present application also provides a pre-charging device for display screen, which includes program code, and the program code can be used to execute the above-mentioned pre-charging method for display screen, wherein the meaning of the nouns is the same as in the above-mentioned pre-charging method for display screen, and the specific implementation details can refer to the description in the method embodiment.

[0116] See also Figure 12 , Figure 12 This is a schematic diagram of a pre-charging device for displaying a screen according to an embodiment of the present application. The program code in the pre-charging device for displaying a screen may be located at Figure 12 In the module shown, at this time, the pre-filling device 1000 of the display screen may include:

[0117] A first determining module 1010 is configured to determine a pre-charge area in the display image based on a driving voltage of each pixel in the display image; wherein each pre-charge area includes a plurality of pixels located in the same row, and a voltage difference between the driving voltage of the pixels in the pre-charge area and the driving voltage of the pixels in the previous row satisfies a preset condition;

[0118] A second determining module 1020 is configured to determine a target grayscale value of a target pixel in the pre-filled area; wherein the target pixel is a pixel in the pre-filled area whose grayscale value needs to be adjusted;

[0119] The pre-charging module 1030 is used to adjust the original grayscale value of the target pixel to the target grayscale value to obtain the display image after pre-charging.

[0120] Optionally, the first determining module 1010 is further configured to:

[0121] Determining a transition sub-region in the display image based on the driving voltage of each pixel in the display image; wherein each transition sub-region includes a plurality of pixels located in the same row, and a voltage difference between the driving voltage of the pixels in the transition sub-region and the driving voltage of the pixels in the previous row satisfies the preset condition;

[0122] The transition sub-region and the sub-region in the same row of the transition sub-region are used as the pre-charge region in the display screen; wherein, the sub-region in the same row and the transition sub-region are located in the same row of the display screen, but the voltage difference between the driving voltage of the pixel in the sub-region in the same row and the driving voltage of the pixel in the previous row does not meet the preset condition.

[0123] Optionally, the first determining module 1010 is further configured to:

[0124] determining, based on the driving voltage of each pixel in the display image, a total voltage jump of each source driver sub-region in the display image; wherein each source driver sub-region includes a plurality of pixels located in the same row, and each source driver sub-region is driven by a source driver integrated circuit; and the total voltage jump refers to the sum of the voltage differences between the driving voltage of the pixel in the source driver sub-region and the driving voltage of the pixel in the previous row;

[0125] If the total voltage jump amount of the source driver sub-region is greater than a preset threshold, the source driver sub-region is used as the jump sub-region; wherein the preset condition includes that the total voltage jump amount is greater than the preset threshold.

[0126] Optionally, the pre-charging device for the display screen is further used to:

[0127] Acquire the display image and the original grayscale value of each pixel in the display image;

[0128] determining a driving type of the display screen;

[0129] If the driving type is positive frame driving, determining the driving voltage of each pixel according to the original grayscale value of each pixel and a preset first voltage mapping table; the first voltage mapping table includes a mapping relationship between the original grayscale value and the driving voltage in the case of the positive frame driving;

[0130] If the driving type is negative frame driving, the driving voltage of each pixel is determined based on the original grayscale value of each pixel and a preset second voltage mapping table; the second voltage mapping table includes a mapping relationship between the original grayscale value and the driving voltage in the case of the negative frame driving.

[0131] Optionally, the second determining module 1020 is further configured to:

[0132] Determining a panel partition in which the pre-fill area is located in the display panel; wherein one pre-fill area includes at least one pre-fill sub-area, and different pre-fill sub-areas are located in different panel partitions;

[0133] Determining a pre-fill mode for each pre-fill sub-region according to the panel partition where each pre-fill sub-region is located and a preset mode mapping table; the mode mapping table includes a mapping relationship between the panel partition and the pre-fill mode;

[0134] For each of the pre-fill sub-regions, the target grayscale value of the target pixel in the pre-fill sub-region is determined according to the pre-fill mode of the pre-fill sub-region.

[0135] Optionally, the second determining module 1020 is further configured to:

[0136] For each of the pre-fill sub-regions, determining the target pixel in the pre-fill sub-region according to the pre-fill mode of the pre-fill sub-region;

[0137] Determining a pre-fill coefficient of the target pixel;

[0138] The target grayscale value of the target pixel is determined according to the original grayscale value of the target pixel and the pre-charge coefficient.

[0139] Optionally, the second determining module 1020 is further configured to:

[0140] Determining a first pre-fill coefficient of the target pixel according to a total voltage jump amount of the source driver sub-region where the target pixel is located and a preset first coefficient mapping table; the first coefficient mapping table includes a mapping relationship between the total voltage jump amount and the first pre-fill coefficient;

[0141] The second pre-fill coefficient of the target pixel is determined according to the original grayscale value of the target pixel and a preset second coefficient mapping table; the second coefficient mapping table includes a mapping relationship between the original grayscale value and the second pre-fill coefficient.

[0142] Optionally, the second determining module 1020 is further configured to:

[0143] determining a grayscale adjustment value of the target pixel according to the original grayscale value of the target pixel and the pre-charge coefficient;

[0144] If the target pixel is located in the transition sub-region of the pre-charge region, subtracting the grayscale adjustment value from the original grayscale value of the target pixel to obtain the target grayscale value of the target pixel;

[0145] If the target pixel is located in a sub-region of the same row in the pre-charge region, the grayscale adjustment value is added to the original grayscale value of the target pixel to obtain the target grayscale value of the target pixel.

[0146] Optionally, the pre-fill sub-region includes a jump sub-region and / or a peer sub-region, and the pre-fill mode includes a first pre-fill mode, a second pre-fill mode, a third pre-fill mode, or a fourth pre-fill mode; wherein,

[0147] In the first pre-charging mode, the pixels in the transition sub-region and the in-line sub-region are pre-charged, and the pixels in the pre-charging sub-region are pre-charged continuously;

[0148] In the second pre-charging mode, the pixels in the transition sub-region and the in-line sub-region are pre-charged, and the pixels in the pre-charging sub-region are pre-charged discontinuously;

[0149] In the third pre-charging mode, only the pixels in the toggle sub-area are pre-charged, and the pixels in the toggle sub-area are pre-charged continuously;

[0150] In the fourth pre-charging mode, only the pixels in the toggle sub-area are pre-charged, and the pixels in the toggle sub-area are pre-charged discontinuously.

[0151] In summary, the pre-charging device for the display screen provided in the embodiment of the present application determines the pre-charging area in the display screen according to the driving voltage of each pixel in the display screen; then determines the target pixel in the pre-charging area and the target grayscale value of the target pixel; and then adjusts the original grayscale value of the target pixel to the target grayscale value to obtain the pre-charged display screen. Since the voltage difference between the driving voltage of the pixel in the pre-charging area and the driving voltage of the pixel in the previous row meets the preset conditions, the embodiment of the present application determines the pre-charging area and pre-charges the pixels in the pre-charging area to achieve local pre-charging compensation processing for the display screen, which can reduce the local drive load, occupy a smaller register, and reduce or eliminate the horizontal crosstalk problem caused by insufficient driving of the working voltage (such as VDD, etc.) of the display device in real time, so as to avoid the appearance of single or multiple abnormal dark lines in the display screen.

[0152] It should be understood that, in specific implementations, the above modules may be implemented as independent entities, or may be arbitrarily combined to be implemented as the same entity or several entities.

[0153] Those skilled in the art will appreciate that the above program code may be stored in a computer-readable storage medium and loaded and executed by a processor.

[0154] To this end, an embodiment of the present application provides a computer-readable storage medium storing program code, which can be loaded by a processor to execute the steps of any of the display screen pre-charging methods provided in the embodiments of the present application. For example, the program code can execute the following steps:

[0155] Determining a pre-charge area in the display image based on a driving voltage of each pixel in the display image; wherein each pre-charge area includes a plurality of pixels located in the same row, and a voltage difference between the driving voltage of the pixels in the pre-charge area and the driving voltage of the pixels in the previous row satisfies a preset condition;

[0156] Determining a target grayscale value of a target pixel in the pre-charge area; wherein the target pixel refers to the pixel in the pre-charge area whose grayscale value needs to be adjusted;

[0157] The original grayscale value of the target pixel is adjusted to the target grayscale value to obtain the pre-charged display image.

[0158] The computer-readable storage medium may include a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0159] Since the program code stored in the computer-readable storage medium can execute the steps in any one of the display screen pre-charging methods provided in the embodiments of the present application, the beneficial effects that can be achieved by any one of the display screen pre-charging methods provided in the embodiments of the present application can be achieved. Please see the previous embodiments for details and will not be elaborated here.

[0160] An embodiment of the present application further provides a display device, which includes a display panel and the pre-charging device for displaying the image as described in the above embodiment.

[0161] The specific implementation methods and corresponding beneficial effects of the above operations can be found in the detailed description of the embodiment of the pre-charging method for the display screen above, which will not be elaborated here.

[0162] The above is a detailed introduction to a pre-charging method and device for a display screen and a display device provided in an embodiment of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, based on the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for precharging a display screen, characterized in that: The method comprises: Determining a pre-charge area in the display image based on a driving voltage of each pixel in the display image; wherein each pre-charge area includes a plurality of pixels located in the same row, and a voltage difference between the driving voltage of the pixels in the pre-charge area and the driving voltage of the pixels in the previous row satisfies a preset condition; Determining a target grayscale value of a target pixel in the pre-charge area; wherein the target pixel refers to the pixel in the pre-charge area whose grayscale value needs to be adjusted; Adjusting the original grayscale value of the target pixel to the target grayscale value to obtain the pre-charged display image; Wherein, determining the target grayscale value of the target pixel in the pre-charge area includes: Determining a panel partition in which the pre-fill area is located in the display panel; wherein one pre-fill area includes at least one pre-fill sub-area, and different pre-fill sub-areas are located in different panel partitions; Determining a pre-fill mode for each pre-fill sub-region according to the panel partition where each pre-fill sub-region is located and a preset mode mapping table; the mode mapping table includes a mapping relationship between the panel partition and the pre-fill mode; For each of the pre-fill sub-regions, determining the target grayscale value of the target pixel in the pre-fill sub-region according to the pre-fill mode of the pre-fill sub-region; The step of determining, for each of the pre-fill sub-regions, the target grayscale value of the target pixel in the pre-fill sub-region according to the pre-fill mode of the pre-fill sub-region comprises: For each of the pre-fill sub-regions, determining the target pixel in the pre-fill sub-region according to the pre-fill mode of the pre-fill sub-region; Determining a pre-fill coefficient of the target pixel; determining the target grayscale value of the target pixel according to the original grayscale value of the target pixel and the pre-charge coefficient; Wherein, determining the pre-fill coefficient of the target pixel includes: Determining a first pre-fill coefficient of the target pixel according to a total voltage jump amount of the source driver sub-region where the target pixel is located and a preset first coefficient mapping table; the first coefficient mapping table includes a mapping relationship between the total voltage jump amount and the first pre-fill coefficient; The second pre-fill coefficient of the target pixel is determined according to the original grayscale value of the target pixel and a preset second coefficient mapping table; the second coefficient mapping table includes a mapping relationship between the original grayscale value and the second pre-fill coefficient.

2. The method for precharging a display screen according to claim 1, wherein: The determining of the pre-charge area in the display image according to the driving voltage of each pixel in the display image includes: Determining a transition sub-region in the display image based on the driving voltage of each pixel in the display image; wherein each transition sub-region includes a plurality of pixels located in the same row, and a voltage difference between the driving voltage of the pixels in the transition sub-region and the driving voltage of the pixels in the previous row satisfies the preset condition; The transition sub-region and the sub-region in the same row of the transition sub-region are used as the pre-charge region in the display screen; wherein, the sub-region in the same row and the transition sub-region are located in the same row of the display screen, but the voltage difference between the driving voltage of the pixel in the sub-region in the same row and the driving voltage of the pixel in the previous row does not meet the preset condition.

3. The method for precharging a display screen according to claim 2, wherein: The determining, according to the driving voltage of each pixel in the display picture, a transition sub-region in the display picture includes: determining, based on the driving voltage of each pixel in the display image, a total voltage jump of each source driver sub-region in the display image; wherein each source driver sub-region includes a plurality of pixels located in the same row, and each source driver sub-region is driven by a source driver integrated circuit; and the total voltage jump refers to the sum of the voltage differences between the driving voltage of the pixel in the source driver sub-region and the driving voltage of the pixel in the previous row; If the total voltage jump amount of the source driver sub-region is greater than a preset threshold, the source driver sub-region is used as the jump sub-region; wherein the preset condition includes that the total voltage jump amount is greater than the preset threshold.

4. The method for precharging a display screen according to claim 1, wherein: Before determining the pre-charge area in the display image according to the driving voltage of each pixel in the display image, the method further includes: Acquire the display image and the original grayscale value of each pixel in the display image; determining a driving type of the display screen; If the driving type is positive frame driving, determining the driving voltage of each pixel according to the original grayscale value of each pixel and a preset first voltage mapping table; the first voltage mapping table includes a mapping relationship between the original grayscale value and the driving voltage in the case of the positive frame driving; If the driving type is negative frame driving, the driving voltage of each pixel is determined based on the original grayscale value of each pixel and a preset second voltage mapping table; the second voltage mapping table includes a mapping relationship between the original grayscale value and the driving voltage in the case of the negative frame driving.

5. The method for precharging a display screen according to claim 1, wherein: Determining the target grayscale value of the target pixel according to the original grayscale value of the target pixel and the pre-charge coefficient includes: determining a grayscale adjustment value of the target pixel according to the original grayscale value of the target pixel and the pre-charge coefficient; If the target pixel is located in the transition sub-region of the pre-charge region, subtracting the grayscale adjustment value from the original grayscale value of the target pixel to obtain the target grayscale value of the target pixel; If the target pixel is located in a sub-region of the same row in the pre-charge region, the grayscale adjustment value is added to the original grayscale value of the target pixel to obtain the target grayscale value of the target pixel.

6. The method for precharging a display screen according to claim 1 or 5, characterized in that: The pre-fill sub-region includes a jump sub-region and / or a line sub-region, and the pre-fill mode includes a first pre-fill mode, a second pre-fill mode, a third pre-fill mode or a fourth pre-fill mode; wherein, In the first pre-charging mode, the pixels in the transition sub-region and the in-line sub-region are pre-charged, and the pixels in the pre-charging sub-region are pre-charged continuously; In the second pre-charging mode, the pixels in the transition sub-region and the in-line sub-region are pre-charged, and the pixels in the pre-charging sub-region are pre-charged discontinuously; In the third pre-charging mode, only the pixels in the toggle sub-area are pre-charged, and the pixels in the toggle sub-area are pre-charged continuously; In the fourth pre-charging mode, only the pixels in the toggle sub-area are pre-charged, and the pixels in the toggle sub-area are pre-charged discontinuously.

7. A pre-charging device for displaying a picture, characterized in that: The device comprises: a first determining module, configured to determine a pre-charge area in the display image based on a driving voltage of each pixel in the display image; wherein each pre-charge area includes a plurality of pixels located in the same row, and a voltage difference between the driving voltage of the pixels in the pre-charge area and the driving voltage of the pixels in the previous row satisfies a preset condition; A second determining module is configured to determine a target grayscale value of a target pixel in the pre-filled area; wherein the target pixel is a pixel in the pre-filled area whose grayscale value needs to be adjusted; A pre-charging module, configured to adjust the original grayscale value of the target pixel to the target grayscale value, thereby obtaining the display image after pre-charging; The second determining module is further configured to: Determining a panel partition in which the pre-fill area is located in the display panel; wherein one pre-fill area includes at least one pre-fill sub-area, and different pre-fill sub-areas are located in different panel partitions; Determining a pre-fill mode for each pre-fill sub-region according to the panel partition where each pre-fill sub-region is located and a preset mode mapping table; the mode mapping table includes a mapping relationship between the panel partition and the pre-fill mode; For each of the pre-fill sub-regions, determining the target grayscale value of the target pixel in the pre-fill sub-region according to the pre-fill mode of the pre-fill sub-region; The second determining module is further configured to: For each of the pre-fill sub-regions, determining the target pixel in the pre-fill sub-region according to the pre-fill mode of the pre-fill sub-region; Determining a pre-fill coefficient of the target pixel; determining the target grayscale value of the target pixel according to the original grayscale value of the target pixel and the pre-charge coefficient; The second determining module is further configured to: Determining a first pre-fill coefficient of the target pixel according to a total voltage jump amount of the source driver sub-region where the target pixel is located and a preset first coefficient mapping table; the first coefficient mapping table includes a mapping relationship between the total voltage jump amount and the first pre-fill coefficient; The second pre-fill coefficient of the target pixel is determined according to the original grayscale value of the target pixel and a preset second coefficient mapping table; the second coefficient mapping table includes a mapping relationship between the original grayscale value and the second pre-fill coefficient.

8. A display device, characterized in that: The display device includes: a display panel, and the pre-charging device for displaying a picture according to claim 7.

Images