Driving method of liquid crystal display panel, display device, equipment and chip

Abstract

The invention provides a driving method of a liquid crystal display panel, a display device, equipment and a chip, belongs to the technical field of display, and aims to reduce driving power consumption. Acquiring a first display gray scale of a plurality of first sub-pixels in the nth row and a second display gray scale of a plurality of second sub-pixels in the (n + 1) th row; wherein n is a positive integer greater than or equal to 1; on the basis of the first display gray scale, the second display gray scale and the signal polarities corresponding to the first sub-pixel and the second sub-pixel respectively, determining a target source signal for charge sharing in multiple columns of source signals of the nth row of display signals; and controlling charge sharing among the plurality of target source signals in the driving period of the nth row of display signals.

Description

Technical Field

[0001] The present disclosure relates to the field of display technologies, and in particular, to a driving method for a liquid crystal display panel, a display device, a device, and a chip. Background Art

[0002] Liquid Crystal Displays (LCDs) are widely used in mobile devices. Among them, the overall low-power consumption requirement of mobile devices is constantly increasing. Therefore, the power consumption of liquid crystal displays is one of the important factors affecting the overall power consumption of mobile device systems. Summary of the Invention

[0003] Based on the content of the background art, the present disclosure provides a driving method for a liquid crystal display panel, a display device, a device, and a chip.

[0004] In a first aspect of the present disclosure, there is provided a driving method for a liquid crystal display panel, where the liquid crystal display panel includes a plurality of sub-pixels arranged in an array, and the driving method includes:

[0005] Based on the nth row display signal to be driven, obtain the first display gray level of a plurality of first sub-pixels in the nth row and the second display gray level of a plurality of second sub-pixels in the (n + 1)th row; where n is a positive integer greater than or equal to 1;

[0006] Based on the first display gray level, the second display gray level, and the signal polarities corresponding to the first sub-pixels and the second sub-pixels respectively, determine target source signals for charge sharing among the multi-column source signals of the nth row display signal;

[0007] During the driving period of the nth row display signal, control charge sharing among the plurality of target source signals.

[0008] Exemplarily, the determining target source signals for charge sharing among the multi-column source signals of the nth row display signal based on the first display gray level, the second display gray level, and the signal polarities corresponding to the first sub-pixels and the second sub-pixels respectively includes:

[0009] Based on the signal polarities, determine a first difference between a first gray level voltage corresponding to the first display gray level of the first sub-pixels belonging to the same column and a second gray level voltage corresponding to the second display gray level of the second sub-pixels;

[0010] Based on the plurality of first differences, determine whether the nth row display signal satisfies the charge sharing condition;

[0011] If so, based on the first gray-scale voltage and the second gray-scale voltage, predict the target charge amount required to drive a plurality of second sub-pixels under charge sharing of a plurality of the source signals, and the first charge change amount brought about by the charge sharing, and based on the target charge amount and the first charge change amount, determine the target source signal.

[0012] Exemplarily, the predicting the target charge amount required to drive a plurality of second sub-pixels to reach the second display gray-scale and the first charge change amount brought about by the charge sharing under charge sharing of a plurality of the source signals based on the first gray-scale voltage and the second gray-scale voltage includes:

[0013] Based on the first gray-scale voltage and the second gray-scale voltage, determine a second difference between the first sub-pixel and the second sub-pixel in the same column;

[0014] Based on a plurality of the second differences, determine a signal difference between the n-th row display signal and the (n + 1)-th row display signal;

[0015] Based on an absolute value of a difference between the signal difference and the second gray-scale voltage, determine the target charge amount;

[0016] Based on the second difference and the second gray-scale voltage, determine the first charge change amount.

[0017] Exemplarily, the determining the target source signal based on the target charge amount and the first charge change amount includes:

[0018] Based on the target charge amount and the first charge change amount, divide a plurality of columns of the source signals into a plurality of signal groups;

[0019] For each of the signal groups, based on the first gray-scale voltage of the first sub-pixel and the second gray-scale voltage of the second sub-pixel in the signal group, determine the target source signal within the signal group.

[0020] Exemplarily, the dividing a plurality of columns of the source signals into a plurality of signal groups based on the target charge amount and the first charge change amount includes:

[0021] When the target charge amount is less than a first preset value and the first charge change amount is less than a second preset value, divide a plurality of columns of the source signals into a plurality of first signal groups; wherein, two adjacent columns of source signals are included in the first signal group;

[0022] When the target charge amount is not less than the first preset value or the first charge change amount is greater than or equal to the second preset value, divide a plurality of columns of the source signals into a plurality of second signal groups; wherein, at least three adjacent columns of source signals are included in the second signal group.

[0023] Exemplarily, determining the target source signal from within the signal group based on the first gray-scale voltage of the first sub-pixel and the second gray-scale voltage of the second sub-pixel in the signal group includes:

[0024] When the signal group includes two columns of source signals adjacent in position, determining each column of the source signals as the target source signal;

[0025] When the signal group includes at least three columns of source signals adjacent in position, predicting a second charge change amount of the signal group under different charge sharing strategies based on the first gray-scale voltage and the second gray-scale voltage within the signal group, and determining the target source signal based on the second charge change amount;

[0026] Wherein, different charge sharing strategies correspond to charge sharing among different multiple source signals within the signal group.

[0027] Exemplarily, determining the target source signal based on the second charge change amount includes:

[0028] Determining a target charge sharing strategy from among multiple charge sharing strategies based on the second charge change amount and a preset charge amount change threshold;

[0029] Taking the source signals that perform charge sharing in the target charge sharing strategy as the target source signals.

[0030] Exemplarily, predicting the second charge change amount within the signal group under different charge sharing strategies based on the first display gray-scale, the second display gray-scale, and the signal polarity of the signal group includes:

[0031] Determining candidate source signals for charge sharing within the signal group, and determining a third difference based on the first gray-scale voltage of the first sub-pixel targeted by the candidate source signals and the second gray-scale voltage of the second sub-pixel targeted by the candidate source signals;

[0032] Determining the second charge change amount based on the third difference.

[0033] Exemplarily, determining the target source signals for charge sharing among multiple columns of source signals of the display signal in the nth row based on the first display gray-scale, the second display gray-scale, and the signal polarities corresponding to the first sub-pixel and the second sub-pixel respectively includes:

[0034] Determining the flipping method corresponding to the liquid crystal display panel, where the flipping method includes a column flipping method, a row flipping method, and a dot flipping method;

[0035] Determine the target source signal based on the flipping method, the first display gray level, the second display gray level, and the signal polarities corresponding to the first sub-pixel and the second sub-pixel respectively.

[0036] Exemplarily, determining the target source signal based on the first display gray level, the second display gray level, and the signal polarities corresponding to the first sub-pixel and the second sub-pixel respectively includes:

[0037] Step 1: Based on the first gray level voltage of the first sub-pixel in the m columns of source signals to be determined currently, and the second gray level voltage of the second sub-pixel, predict the third charge change amount in the state of charge sharing of the m columns of source signals; wherein, the first gray level voltage is determined by the signal polarity of the first sub-pixel and the first display gray level, and the second gray level voltage is determined by the signal polarity of the second sub-pixel and the second display gray level;

[0038] Step 2: Determine whether the third charge change amount is less than a third preset value;

[0039] If so, add one column of source signals, and repeat the above Step 1 and Step 2 until the third charge change amount is greater than the third preset value. Take the first M - 1 columns of source signals among the M columns of source signals when the third charge change amount is greater than the third preset value as the target source signal, and take the Mth column of source signals as the source signal without charge sharing; where M is greater than m;

[0040] If not, take the m columns of source signals as the source signal without charge sharing, and start repeating the above Step 1 and Step 2 from the (m + 1)th column of source signals.

[0041] Exemplarily, the display panel includes a timing control chip. Determining the target source signal for charge sharing among multiple columns of source signals of the display signal in the nth row based on the first display gray level, the second display gray level, and the signal polarities corresponding to the first sub-pixel and the second sub-pixel respectively includes:

[0042] Determine the current performance parameters of the timing control chip;

[0043] Based on the performance parameters, divide multiple columns of source signals to obtain multiple third signal groups;

[0044] For each of the third signal groups, determine the target source signal in the third signal group based on the first display gray level of the first sub-pixel, the second display gray level of the second sub-pixel, and the signal polarity in the third signal group.

[0045] Exemplarily, the liquid crystal display panel includes a plurality of source driver chips, each of the source driver chips being connected to a part of the plurality of source lines. Determining a target source signal for charge sharing among multiple column source signals of the n-th row display signal based on the first display gray level, the second display gray level, and the signal polarities corresponding to the first sub-pixel and the second sub-pixel respectively includes:

[0046] Dividing the n-th row display signal into sub-display signals corresponding to each of the source driver chips;

[0047] Based on the first display gray level of the first sub-pixel, the second display gray level of the second sub-pixel, and the signal polarity in the sub-display signal, determining the target source signal from the sub-display signal.

[0048] Exemplarily, determining the target source signal from the sub-display signal based on the difference between the first display gray level of the first sub-pixel and the second display gray level of the second sub-pixel in the sub-display signal, and the signal polarity includes:

[0049] Continuing to divide the sub-display signal to obtain a plurality of target sub-display signals;

[0050] Based on the first display gray level of the first sub-pixel, the second display gray level of the second sub-pixel, and the signal polarity in the target sub-display signal, determining the target source signal from the target sub-display signal.

[0051] The present disclosure also provides a display device, including a liquid crystal display panel, a source driver chip, and a timing control chip. The liquid crystal display panel includes a plurality of source lines and a plurality of gate lines. The plurality of source lines and the plurality of gate lines define a plurality of sub-pixels arranged in an array. Among them, the source driver chip is configured to output source signals to the plurality of source lines, and the timing control chip is connected to the source driver chip;

[0052] The timing control chip is configured to, based on the n-th row display signal to be driven, obtain the first display gray levels of a plurality of first sub-pixels in the n-th row and the second display gray levels of a plurality of second sub-pixels in the (n + 1)-th row; and based on the first display gray level, the second display gray level, and the signal polarities corresponding to the first sub-pixel and the second sub-pixel respectively, determine a target source signal for charge sharing among multiple column source signals of the n-th row display signal; where n is a positive integer greater than or equal to 1;

[0053] The source driver chip is configured to control charge sharing among the target source signals during the driving period of the n-th row display signal.

[0054] Exemplarily, a plurality of the source driver chips are included, each of the source driver chips is connected to a part of the plurality of source lines, and the timing control chip is respectively connected to the plurality of source driver chips;

[0055] Wherein, the timing control chip is specifically configured to divide the nth row display signal into sub-display signals corresponding to each of the source driver chips; and determine the target source signal from the sub-display signals based on the first display gray level of the first sub-pixel, the second display gray level of the second sub-pixel, and the signal polarity in the sub-display signals.

[0056] Exemplarily, the timing control chip is further configured to determine the current performance parameters of the timing control chip; divide the multi-column source signals based on the performance parameters to obtain a plurality of third signal groups; and for each of the third signal groups, determine the target source signal in the third signal group based on the first display gray level of the first sub-pixel, the second display gray level of the second sub-pixel, and the signal polarity in the third signal group.

[0057] Exemplarily, a switching element is connected between two adjacent source lines among the plurality of source lines, wherein,

[0058] The timing control chip is specifically configured to determine the switching state of each switching element based on the target source signal, and send the switching state to the source driver chip;

[0059] The source driver chip is specifically configured to control the switching elements according to the switching states of the plurality of switching elements, so as to perform charge sharing between the plurality of target source signals.

[0060] The present disclosure also provides a computer-readable storage medium, and a computer program stored therein enables a processor to execute the driving method of the liquid crystal display panel.

[0061] The present disclosure also provides a timing control chip, which is located in the liquid crystal display panel, and the timing control chip is used to execute the driving method of the liquid crystal display panel.

[0062] By adopting the driving method of the present disclosure, the first display gray levels of a plurality of first sub-pixels in the nth row and the second display gray levels of a plurality of second sub-pixels in the (n + 1)th row can be obtained based on the nth row display signal to be driven; then, based on the first display gray level and the second display gray level, and the signal polarities corresponding to the first sub-pixel and the second sub-pixel respectively, the target source signal for charge sharing can be determined among the multi-column source signals of the nth row display signal; within the driving period of the nth row display signal, the target source signals are short-circuited so that charge sharing is performed between the plurality of target source signals.

[0063] When driving multiple first sub-pixels in the n-th row for display, based on the second display gray level of multiple second sub-pixels in the (n + 1)-th row, the first display gray level of the first sub-pixels, and the signal polarities of each sub-pixel, a target source signal for charge sharing can be determined among multiple columns of source signals of the display signal in the n-th row, and during the driving period of the display signal in the n-th row, the target source signals are short-circuited so that charge sharing occurs among the multiple target source signals. Thus, when each row of sub-pixels is driven, charge sharing can be performed on the target source signals that can undergo charge sharing based on the difference between gray scale voltages (obtained according to the display gray level and signal polarity). Therefore, when each row of sub-pixels is driven, the source signals that can be charge-shared can be determined correspondingly, thereby reducing the power consumption of the liquid crystal display panel as a whole.

[0064] The above description is only an overview of the technical solution of the present disclosure. In order to be able to understand the technical means of the present disclosure more clearly, it can be implemented according to the content of the specification. And in order to make the above and other objects, features, and advantages of the present disclosure more obvious and understandable, the following specifically illustrates the specific embodiments of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, the drawings in the following description are some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. It should be noted that the ratios in the drawings are only for illustration and do not represent the actual ratios.

[0066] Figure 1 Schematic diagrams showing four polarity inversion modes are presented;

[0067] Figure 2 Schematic diagrams showing the influence of charge neutralization on driving power consumption in related technologies are presented;

[0068] Figure 3 Schematic diagrams showing the driving circuit diagram of the liquid crystal display panel in the embodiments of the present disclosure are presented;

[0069] Figure 4 Schematic diagrams showing the step flow of the driving method of the liquid crystal display panel in the embodiments of the present disclosure are presented;

[0070] Figure 5 Schematic diagrams showing the flow of determining a target source signal in the embodiments of the present disclosure are presented;

[0071] Figure 6 Schematic diagrams showing different charge sharing strategies in the second signal group in the embodiments of the present disclosure are presented;

[0072] Figure 7 It shows a schematic diagram of the steps for determining a target source signal in an embodiment of the present disclosure;

[0073] Figure 8 It shows a driving circuit diagram of liquid crystal display panel A in an embodiment of the present disclosure;

[0074] Figure 9 It shows a schematic diagram of the flow of the target source signal in liquid crystal display panel A in an embodiment of the present disclosure;

[0075] Figure 10 It shows a schematic diagram of the flow of the target source signal in liquid crystal display panel B in an embodiment of the present disclosure;

[0076] Figure 11 It shows a top view schematic diagram of a display device in an embodiment of the present disclosure. Detailed implementation manners

[0077] To make the above objects, features, and advantages of the present disclosure more obvious and understandable, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present disclosure.

[0078] In the related art, a liquid crystal display panel includes two array substrates and a color filter substrate arranged in a pair, and a liquid crystal layer is provided between the array substrate and the color filter substrate. Among them, the array substrate is used to drive the liquid crystal in the liquid crystal layer to deflect. The array substrate may include multiple gate lines and multiple source lines, and the multiple gate lines and multiple source lines are arranged in an array. A liquid crystal driving circuit is connected to the intersection area of the gate line and the source line. In this way, multiple liquid crystal driving circuits are included, and one liquid crystal driving circuit corresponds to one sub-pixel. Among them, multiple sub-pixel electrodes are also provided on the array substrate, and a common electrode may also be provided on the color filter substrate. Of course, in some other examples, the common electrode may also be provided on the array substrate together with the sub-pixel electrodes. One sub-pixel electrode corresponds to one sub-pixel; during display driving, the voltage applied on the gate line is used to turn on the liquid crystal driving circuit, so that the gray-scale voltage (also called driving voltage) output by the source line can be applied to the sub-pixel electrode. An electric field for driving the liquid crystal to deflect is formed between the gray-scale voltage on the sub-pixel electrode and the common voltage applied to the common electrode. When the liquid crystal deflects, it allows the light of the backlight source to pass through or does not allow the light of the backlight source to pass through.

[0079] Among them, the gray-scale voltage applied to the liquid crystal cannot be fixed at a certain value. Otherwise, the liquid crystal will be polarized for a long time and gradually lose its dazzling light characteristics. Therefore, in order to avoid damaging the properties of the liquid crystal, it is necessary to change the polarity of the gray-scale voltage of the liquid crystal. Thus, the gray-scale voltage in the array substrate is divided into two polarities, one is the positive polarity and the other is the negative polarity. Among them, when the voltage applied to the sub-pixel electrode is higher than the voltage on the common electrode, it is called the positive polarity. When the voltage applied to the sub-pixel electrode is lower than the voltage on the common electrode, it is called the negative polarity. Of course, whether it is the positive polarity or the negative polarity, for each sub-pixel, there will be a set of gray levels with the same brightness. This is because whether it is the positive polarity or the negative polarity, as long as the voltage difference between the common electrode and the sub-pixel electrode is the same, the gray levels will be the same, but the direction of the liquid crystal rotation will be opposite. Thus, it is possible to avoid the damage of the dazzling light characteristics when the rotation of the liquid crystal is always fixed in one direction.

[0080] In the related art, the common polarity conversion modes include four modes: frame-by-frame flipping, row-by-row flipping, column-by-column flipping, and point-by-point flipping. Refer to Figure 1 As shown, a schematic diagram of the four polarity flipping modes is shown. As Figure 1 shown, in the frame-by-frame flipping mode, the polarities of adjacent sub-pixel points in one frame of the picture are the same, such as all being the positive polarity. The polarities of adjacent sub-pixel points in the next frame of the picture are also the same, but their polarities are opposite to those of the previous frame of the picture. For example, the adjacent sub-pixel points in the next frame of the picture are all the negative polarity. In the row-by-row flipping, the polarities of the sub-pixels connected to two adjacent gate lines are opposite; in the column-by-column flipping, the polarities of the sub-pixels connected to two adjacent source lines are opposite; in the point-by-point flipping, the polarities of two adjacent sub-pixel points are opposite.

[0081] In the polarity conversion mode, a charge sharing technology emerged as the times require. This technology means that charge sharing can occur between sub-pixels with opposite polarities. Its specific principle is to add switches and capacitors on the basis of the column driving circuit. Using the liquid crystal inversion driving method and the characteristic that the voltage polarities of adjacent sub-pixels in the same row are different, the charges on the sub-pixels can be neutralized with almost no energy consumption, thereby achieving the purpose of energy saving. This makes it possible to reduce the power consumption of the liquid crystal display panel.

[0082] The commonly used charge neutralization strategy is to confirm a charge neutralization method according to the analysis of the entire frame of the picture. For example, when a frame of the picture arrives, a charge neutralization method is set among the sub-pixels. However, although this charge sharing can save energy, in the display driving, it does not necessarily save power comprehensively. The main reason is that: after charge neutralization, if the difference between the gray level of the sub-pixel and the target gray level to be displayed by the sub-pixel is still greater than the difference between the gray level of the sub-pixel without charge neutralization and the target gray level, more power consumption will be consumed. Refer to Figure 2 As shown, a schematic diagram of the influence of charge neutralization on the driving power consumption in the related art is shown. As Figure 2As shown Figure 2 As shown on the left, column inversion polarity control is adopted, and a switching element is added between adjacent source lines. When it is turned on, charge neutralization occurs between adjacent sub-pixels. Figure 2 The right side shows the schematic diagrams before and after charge neutralization. When two adjacent sub-pixels are neutralized and are the same as the output data of the next row, the neutralization effect is the best. When the neutralization results vary greatly, the neutralization effect is not good and the purpose of power saving cannot be achieved, and even the power consumption of the panel increases.

[0083] For example, as Figure 2 shown, it is the column flipping method. If the display gray level of the sub-pixels in the previous row and the display gray level of the sub-pixels in the next row differ greatly, for example, the previous row is 255 and the next row is 0. After neutralization, the gray level voltage of the sub-pixels in the next row is electrically neutralized to the gray level voltage corresponding to 0 gray level; at this time, after neutralization, the driving efficiency can be improved and the power consumption can be reduced; if the previous row is 255 and the next row is 200, where the gray level voltage of L255 with negative polarity > the gray level voltage of L200 with positive polarity, at this time, after charge neutralization, more charges are needed to reach L200, increasing the power consumption of the panel. That is to say, if the gray level corresponding to the sub-pixel after neutralization is not much different from the target gray level that the sub-pixel is about to display, then neutralization can reduce the power consumption. If the gray level corresponding to the sub-pixel after neutralization is very different from the target gray level that the sub-pixel is about to display, then neutralization instead increases the power consumption.

[0084] In view of this, the inventor of the present invention proposes a driving method, which can finely layout the charge sharing scheme. The core scheme is: according to the gray level voltages corresponding to different display gray levels of the sub-pixels between rows, when driving each row of sub-pixels to display, there is a corresponding charge neutralization scheme. In this way, during the driving cycle of each row of sub-pixels, the charge sharing state between the source signals can be determined, that is, when driving each row, the target source signals for charge sharing can be determined for that row, so that charge sharing occurs between the target source signals. Thus, the driving power consumption of each row of sub-pixels can be finely adjusted according to the sub-pixel rows, avoiding the above problems.

[0085] Among them, the driving method provided by the present disclosure can be applied to a liquid crystal display panel with any flipping method.

[0086] Referring to Figure 3 and Figure 4 shown Figure 3 shows the driving circuit diagram of the liquid crystal display panel Figure 4 shows the schematic diagram of the steps of the driving method of the liquid crystal display panel of the present disclosure. As Figure 3As shown, the liquid crystal display panel includes multiple source lines and multiple gate lines, and the multiple source lines and multiple gate lines define multiple sub-pixels; wherein, a switching element is connected between two adjacent source lines, and the switching element is used for charge sharing between sub-pixels in the conducting state, that is to say, it can be used for charge sharing between adjacent source signals.

[0087] As Figure 3 shown, multiple source lines are arranged in multiple columns, multiple gate lines are arranged in multiple rows, and the intersection area of the source lines and the gate lines defines sub-pixels. Specifically, the intersection area includes a thin film transistor (TFT), and one thin film transistor (TFT) corresponds to one sub-pixel. The thin film transistor (TFT) is connected to both the source line and the gate line. Among them, the voltage applied to the gate line is used to turn on the thin film transistor (TFT). After being turned on, the source line outputs a gray scale voltage to the thin film transistor (TFT), and this gray scale voltage is applied to the sub-pixel electrode, thereby driving the liquid crystal to deflect, so as to realize the light emission display of the sub-pixel. Among them, in the driving display of one frame of picture, generally, it is scanned from top to bottom and from left to right to sequentially light up each sub-pixel; of course, there can also be other scanning methods, which will not be elaborated here.

[0088] Among them, a switching element is arranged between two adjacent source lines. When the switching element is closed, it can enable charge sharing between adjacent rows of sub-pixels. During charge sharing, the charge on a column of thin film transistors (TFTs) can be charged to an adjacent column of thin film transistors (TFTs), so as to realize charge neutralization. Among them, the polarity inversion mode of the liquid crystal display panel can be row inversion, column inversion or can be a dot inversion mode. Among them, no matter which polarity inversion mode, charge neutralization can be realized when the switching element is in the conducting state.

[0089] Exemplarily, as Figure 3 shown, in the column inversion mode, the i-th source line can be connected to the (i + 1)-th source line through a switching element, so that the charge on the i-th source line and the charge on the (i + 1)-th source line are neutralized in the previous display driving cycle (driving the sub-pixel to perform gray scale representation). Since each source line is connected with a capacitor, the capacitor is used for charging or discharging during the display driving cycle. Among them, in the positive polarity, a voltage VH higher than the common voltage is input to the source line, so that the capacitor on the source line is charged. In the negative polarity, a voltage VL lower than the common voltage is input to the source line, so that the capacitor on the source line is discharged. When the two source lines are connected, the charges of the capacitors on the two source lines are neutralized.

[0090] As Figure 3 shown, in the row inversion mode, through timing control, the i-th source line is connected to the (i + 1)-th source line through a switching element in a suitable driving cycle, and it can also make the charge on the i-th source line and the charge on the (i + 1)-th source line neutralized.

[0091] AsFigure 3 As shown, in the dot inversion mode, the polarities of two adjacent sub-pixels are opposite. Thus, by designing the driving timing, in the appropriate driving period, the i-th source line can be connected to the (i + 1)-th source line through a switching element, so that the charges on the i-th source line and the (i + 1)-th source line are neutralized.

[0092] Based on the above inventive concept, when the driving period of the sub-pixels in the n-th row arrives, it is necessary to determine the switching elements that need to be turned on during the driving period of the sub-pixels in the n-th row to reduce the power consumption of the liquid crystal panel. That is to say, it is necessary to determine the switching state of each switching element. The switching state includes the on state and the off state. In the on state, the two source lines are short-circuited, so that the source signals transmitted on the two source lines can achieve charge sharing; in the off state, the two source lines are disconnected, so that the source signals transmitted on the two source lines do not perform charge sharing.

[0093] Hereinafter, the source signal for realizing charge sharing is referred to as the target source signal. Specifically, as Figure 4 shown, the driving method may specifically include the following steps:

[0094] Step S401: Based on the display signal of the n-th row to be driven, obtain the first display gray levels of multiple first sub-pixels in the n-th row and the second display gray levels of multiple second sub-pixels in the (n + 1)-th row;

[0095] Wherein, n is a positive integer greater than or equal to 1.

[0096] In this embodiment, the display signal of the n-th row includes the display signals of all sub-pixels in the n-th row. Assuming that it includes J columns of sub-pixels, the display signal of the n-th row may include the display signals of J sub-pixels. Each display signal can carry the display gray level value of the sub-pixel. According to the display gray level value, the gray level voltage applied to the pixel electrode of the sub-pixel can be obtained. Specifically, the display signal may be the source signal input to the source line. That is to say, the display signal may include multiple source signals, and each source signal corresponds to a certain column of sub-pixels in the sub-pixels of the n-th row. Among them, the source signal and the display gray level value of a sub-pixel can be in one-to-one correspondence, that is, after the source signal is input to the sub-pixel, the sub-pixel will present the corresponding gray level value during the display stage.

[0097] Wherein, the display signal of the n-th row to be driven can be determined by the system-level chip of the liquid crystal display panel according to the picture data to be displayed. Whenever the sub-pixels in the (n - 1)-th row are scanned and displayed, the display of the sub-pixels in the n-th row starts. That is to say, after the display signal of the n-th row is displayed, the display signal of the (n + 1)-th row is displayed.

[0098] Among them, when obtaining the display signal of the nth row, the first display gray levels of multiple first sub-pixels in the nth row and the second display gray levels of multiple second sub-pixels in the (n + 1)th row can be determined first. Specifically, the second display gray levels of multiple second sub-pixels in the (n + 1)th row can be obtained from the display data cached in the line buffer.

[0099] Among them, the first display gray level is the gray level value that each first sub-pixel in the nth row needs to present during the display stage. For example, if the first display gray level of a first sub-pixel is 20, after driving this first sub-pixel, it presents a gray level value of 20. Similarly, the second display gray level is the gray level value that each second sub-pixel in the (n + 1)th row needs to present during the display stage. For example, if the second display gray level of a second sub-pixel is 50, after driving this second sub-pixel, it presents a gray level value of 50.

[0100] It should be noted that the number of first sub-pixels is the same as the number of second sub-pixels. For example, if there are J columns of source signals, the number of first sub-pixels is J, and the number of second sub-pixels is also J.

[0101] Step S402: Based on the difference between the first display gray level and the second display gray level, and the signal polarities corresponding to the first sub-pixels and the second sub-pixels respectively, determine the target source signals for charge sharing among the multiple columns of source signals of the display signal in the nth row.

[0102] In this embodiment, after obtaining the first display gray level and the second display gray level, the first gray level voltage corresponding to the first display gray level and the second gray level voltage corresponding to the second display gray level can be obtained, and the difference between the first gray level voltage and the second gray level voltage can be calculated. This difference can be the difference between the average value of multiple first gray level voltages and the average value of multiple second gray level voltages, or the difference between the gray level voltages of the first sub-pixel and the second sub-pixel in the same column. Then, the sum of the differences in the display gray levels on multiple source lines is used as the difference between the two.

[0103] Among them, if this difference indicates that the first gray level voltage and the second gray level voltage are exactly the same, it means that the images of the previous row and the next row are not much different, that is, the gray level voltages of the first sub-pixels in the previous row and the second sub-pixels in the next row are almost the same. In this case, if charge sharing is carried out, it will instead bring higher power consumption. In this case, when driving the display signal in the nth row, charge sharing can be prevented among the respective source signals.

[0104] If this difference indicates that the two are not completely consistent, it means that there is a difference between the previous line of the picture and the next line of the picture, that is, there is a difference in the gray-scale voltage between the first sub-pixel of the previous line and the second sub-pixel of the next line. The situations where this difference exists can include: there is a difference in the displayed gray scale between the first sub-pixels and the second sub-pixels of some columns, while there is no difference in the displayed gray scale between the first sub-pixels and the second sub-pixels of other columns; and there is a difference in the displayed gray scale between the first sub-pixels and the second sub-pixels of all columns.

[0105] Among them, since there are some first sub-pixels with opposite signal polarities to the second sub-pixels, therefore, power consumption during driving the second sub-pixels can be saved through charge sharing. Thus, it is necessary to determine which columns of source signals among the source signals of the n-th row display signal perform charge sharing. Among them, the signal polarity refers to the polarity of the gray-scale voltage for driving the sub-pixel. As described above, if the gray-scale voltage is less than the common voltage, the polarity is negative, which is called a negative-polarity signal; if the gray-scale voltage is greater than the common voltage, the polarity is positive, which is called a positive-polarity signal.

[0106] Specifically, in the case of including J columns of source lines, including J first sub-pixels and J second sub-pixels, first, the first difference between the first sub-pixels and the second sub-pixels on the same column of source line can be obtained. Then, according to the signal polarities between the first sub-pixels and the second sub-pixels on the same column of source line, the amount of charge change between driving these two sub-pixels can be determined. If the amount of charge change is large, charge sharing can be performed to reduce the power consumption during driving the second sub-pixels. If the amount of charge change is small, charge sharing can be not performed to avoid consuming excessive power.

[0107] Among them, the larger the amount of charge change, it can indicate that the change amplitude between the source signals is large. Through charge sharing, the change amplitude can be reduced, thereby saving power. Then, in one example, when determining the target source signal based on the difference between the gray-scale voltages, the target source signal that needs to perform charge sharing can be determined with the goal of minimizing the power consumption when driving multiple second sub-pixels.

[0108] It should be noted that the determined target source signal belongs to the source signals in the n-th row display signal. As described above, the n-th row display signal can include J source signals, corresponding to J source lines respectively. Generally speaking, each row of display signals can include J source signals. However, among the display signals of different rows, the source signals belonging to the same source line can be different. For example, the source signal of the first column in the first row can be different from the source signal of the first column in the second row. Thus, when driving each row of sub-pixels, charge sharing can be performed on the target source signal for the sub-pixels of that row.

[0109] Among them, the target source signal can be all the source signals in the display signal of the nth row, or can be part of the source signals in the display signal of the nth row. Or, as described above, the target source signal may not exist, that is, there is no sharing between source signals. Specifically, it needs to be determined according to the difference between the first display gray level of the first sub-pixel and the second display gray level of the second sub-pixel in each column, and the signal polarities between the two.

[0110] Step S403: During the driving period of the display signal of the nth row, control charge sharing between multiple target source signals.

[0111] When determining the target source signals that need to perform charge sharing, charge sharing can be performed between the target source signals. Specifically, the switching elements between the source lines where the target source signals are located can be controlled to conduct, so that the two source lines are short-circuited, and then charge sharing is performed. Among them, during charge sharing, the charge stored on one source line by the source signal can be transferred to another source line.

[0112] Specifically, the time stage for performing charge sharing can be: after driving the pixels in the nth row to display gray levels and before driving the pixels in the nth + 1th row to display gray levels. In specific implementation, after driving the pixels in the nth row to display gray levels, the switching elements between the source lines where the target source signals are located can be controlled to conduct, and the switches between the source lines where the source signals other than the target source signals are located can be turned off. Thus, charge sharing is enabled. After charge sharing, the driving of the pixels in the nth + 1th row is entered.

[0113] By using the driving method of the embodiments of the present disclosure, when driving multiple first sub-pixels in the nth row to display, the target source signals for charge sharing can be determined among the multi-column source signals of the display signal in the nth row based on the difference between the second display gray level of multiple second sub-pixels and the first display gray level of the first sub-pixels in the nth + 1th row, and the signal polarities of each sub-pixel, and charge sharing is performed between multiple target source signals during the driving period of the display signal in the nth row. Thus, when each row of sub-pixels is driven, charge sharing can be performed between the target source signals that can perform charge sharing based on the difference between the display gray levels of the sub-pixels in the adjacent row and the signal polarities of multiple sub-pixels in the adjacent row. Thus, the driving power consumption of the sub-pixels in the next row can be reduced. In this way, the power consumption of the liquid crystal display panel can be refined and reduced at the granularity of pixel rows, so that the power consumption of the liquid crystal display panel is minimized.

[0114] In some embodiments, based on the difference between the first display gray level and the second display gray level and the signal polarities of the first sub-pixel and the second sub-pixel respectively, it is possible to predict the amount of charge required to drive the second sub-pixel to reach the second display gray level after charge sharing if charge sharing is performed, and compare this amount of charge with the amount of charge required to drive the second sub-pixel to reach the second display gray level when charge sharing is not performed, so as to comprehensively determine whether charge sharing needs to be performed and the target source signal for which charge sharing needs to be performed.

[0115] In some examples, as described above, the difference between the gray level voltage corresponding to the first display gray level and the gray level voltage corresponding to the second display gray level can be calculated. Thus, multiple differences can be obtained. For example, if there are J column source lines, then J differences are included. Based on these multiple differences, the overall difference between the nth row display signal and the (n + 1)th row display signal can be obtained. If the overall difference is very small, charge sharing may not be performed between multiple column source signals. If the overall difference is very large, charge sharing can be performed, and further determine which target source signals perform charge sharing. Thus, it can be determined which switching elements between source lines need to be in the on state during the driving period of the nth row display signal.

[0116] During specific implementation, referring to Figure 5 as shown, a schematic flow diagram for determining the target source signal is shown. As Figure 5 shown, first, based on the signal polarity, the first difference between the first gray level voltage corresponding to the first display gray level of the first sub-pixels belonging to the same column and the second gray level voltage corresponding to the second display gray level of the second sub-pixels can be determined; then, based on multiple first differences, it can be determined whether the nth row display signal meets the charge sharing condition; if the charge sharing condition is not met, then during the driving period of the nth row display signal, charge sharing is not performed between multiple column source signals, that is, the switching states of the switching elements between multiple source lines are all off states; if the charge sharing condition is met, then it is possible to predict the target amount of charge required to drive multiple second sub-pixels to reach the second display gray level under charge sharing of multiple source signals, and the first charge change amount brought about by charge sharing, and based on the target amount of charge and the first charge change amount, determine the target source signal.

[0117] Among them, the charge sharing condition may include: the condition that the first gray level voltage of the first sub-pixels in each column is inconsistent with the second gray level voltage of the second sub-pixels, or the condition that the first difference between them is relatively large, such as greater than a certain preset difference. On the contrary, if the first display gray level of the first sub-pixels in each column is the same as the second display gray level of the second sub-pixels, or the first difference between the first display gray level of the first sub-pixels in each column and the second display gray level of the second sub-pixels is less than the preset difference, and this preset difference can be relatively small, such as 0 - 5, it means that the charge sharing condition is not met.

[0118] Exemplarily, when the first difference between the first display gray level of the first sub-pixel and the second display gray level of the second sub-pixel in each column is 0, that is, when the gray level voltages of the first sub-pixel and the second sub-pixel on each column are the same, it can indicate that the charge sharing condition is not met, that is, the two do not perform charge sharing. For example, if the display gray levels between the first sub-pixel and the second sub-pixel on the first column are both 20, and the display gray levels between the first sub-pixel and the second sub-pixel on the second column are both 30, it indicates that their display gray levels are the same.

[0119] Exemplarily, when the first difference between the first gray level voltage of the first sub-pixel and the second gray level voltage of the second sub-pixel in each column is less than the preset difference, that is, the gray level voltages of the first sub-pixel and the second sub-pixel on each column differ very little, it indicates that the charge sharing condition is not met, and charge sharing may not be performed. For example, if the difference in gray level voltages between the first sub-pixel and the second sub-pixel on the first column is 1, and the difference in gray level voltages between the first sub-pixel and the second sub-pixel on the second column is 2, it indicates that their gray level voltages are nearly the same, and this is the case for each column, and charge sharing can be not performed among multiple source signals in the nth row.

[0120] Wherein, when the first difference between the first gray level voltage of the first sub-pixel and the second gray level voltage of the second sub-pixel is large, or when the first gray level voltage of the first sub-pixel and the second gray level voltage of the second sub-pixel are inconsistent, it indicates that the charge sharing condition is met, and thus, the target source signal can be determined again.

[0121] It should be noted that, in the column flipping mode, since the signal polarities on one source line are the same, when determining the first difference, it can directly be the difference between the first display gray level and the second display gray level. In the row flipping mode, since the signal polarities on one source line are inconsistent, it is necessary to determine the first difference between the first gray level voltage and the second gray level voltage. Among them, if the signal polarity of a sub-pixel is negative, the corresponding gray level voltage can be the negative of the display gray level; if the signal polarity of the sub-pixel is positive, the corresponding gray level voltage can be the positive value of the display gray level, which is actually the value of the display gray level. That is to say, the gray level voltage can be represented by the display gray level with polarity.

[0122] Among them, in the process of determining the target source signal, the total charge required to drive the second sub-pixel can be predicted based on the first display gray level, the second display gray level, and the signal polarity under the charge sharing of multiple source signals. In this case, the first gray level voltage can be the first display gray level with signal polarity, and the second gray level voltage can also be the second display gray level with signal polarity. In this case, through the first display gray level and the second display gray level with polarity, the gray level voltage after charge summation can be determined, and then the signal swing amplitude after charge neutralization can be determined. This signal swing amplitude can be understood as the basic swing amplitude for driving the second sub-pixel. The second sub-pixel is then driven at this signal swing amplitude, so as to determine the total target charge required to drive multiple second sub-pixels with the goal of driving the second sub-pixel to reach the gray level voltage corresponding to the second display gray level. This target charge can reflect the magnitude of the power consumption required to drive the first sub-pixel.

[0123] Exemplarily, assume that the gray level voltage after charge summation is 30 (represented by the display gray level), and the second display gray level of a second sub-pixel is 200 (represented by the display gray level). Then the target charge for driving the second sub-pixel is (200 - 30) = 170. By analogy, the target charge required for each second sub-pixel can be obtained, and then the target charge for multiple second sub-pixels can be obtained.

[0124] Among them, since charge neutralization occurs between column pixels, it is possible to determine the first charge change amount corresponding to multiple first sub-pixels after charge summation. Exemplarily, this first charge change amount can be the sum of the first gray level voltages, and this first charge change amount can reflect the charge neutralization effect.

[0125] In practice, based on the target charge and the first charge change amount, the power consumption situation under the charge sharing of multiple source signals can be determined. The target charge and the first charge change amount can be respectively compared with their corresponding thresholds to determine the power consumption situation. For example, the target charge can be compared with the driving charge threshold, and the first charge change amount can be compared with the change amount threshold. If the comparison results show that the target charge is less than the driving charge threshold and the first charge change amount is less than the change amount threshold, it means that the charge neutralization effect is good and the power consumption is low. Therefore, charge sharing can be performed on all multiple source signals; otherwise, in order to save power, some source signals that can perform charge sharing can be selected from the multiple source signals.

[0126] Among them, in some examples, when predicting the target charge and the first charge change amount under the charge sharing of multiple source signals, the determination process can be as follows:

[0127] First, based on the first gray-scale voltage and the second gray-scale voltage, a second difference between the first sub-pixel and the second sub-pixel in the same column can be determined;

[0128] Next, based on a plurality of the second differences, a signal difference between the display signal of the nth row and the display signal of the (n + 1)th row is determined;

[0129] After that, based on the absolute value of the difference between the signal difference and the second gray-scale voltage, a target charge amount is determined; after that, based on the second difference and the second gray-scale voltage, a first charge change amount is determined.

[0130] Specifically, the first gray-scale voltage may be a first display gray-scale with a polarity, and the second gray-scale voltage may be a second display gray-scale with a polarity. Thus, a second difference between the first display gray-scale after polarity assignment and the second display gray-scale after polarity assignment can be determined, and this second difference can reflect the gray-scale voltage change between driving the first sub-pixel and the second sub-pixel in the same column successively.

[0131] Exemplarily, assume that the signal polarity of the first sub-pixel is negative polarity, then the first display gray-scale is represented by a negative number. Assume that the signal polarity of the first sub-pixel is positive polarity, then the first display gray-scale is represented by a positive number. For example, in the column inversion mode, the signal polarity of the first sub-pixel is positive polarity, and its first display gray-scale is 200. The signal polarity of the second sub-pixel is also positive polarity, and its second display gray-scale is 250. Then the second difference G ave =(200 - 250)= -50. Another example, in the row inversion mode, the signal polarity of the first sub-pixel is positive polarity, and its first display gray-scale is 200. The signal polarity of the second sub-pixel is negative polarity, and its second display gray-scale is 250. Then the second difference G ave =(200 - (-250)= 450.

[0132] Among them, a plurality of second differences can be obtained. In practice, the average value of the plurality of second differences can be used as the signal difference between the display signal of the nth row and the display signal of the (n + 1)th row; when calculating the target charge amount, the absolute value of the difference between each second gray-scale voltage and the signal difference can be calculated, and the sum of the absolute values is used as the target charge amount.

[0133] Exemplarily, the target charge amount can be calculated according to the following formulas (1) and (2):

[0134]

[0135] SumQ = |G1 n+1 - G Qave | + |G2 n+1 - G Qave | + |G3n+1 -G Qave |+…+|Gm n+1 -G Qave |

[0136] Formula (2);

[0137] Wherein, G Qave represents the second difference, SumQ represents the target charge amount, G1 n+1 represents the second grayscale voltage (second display grayscale with signal polarity) of the second sub-pixel in the (n + 1)-th row and the 1st column, and G1 n represents the first grayscale voltage (first display grayscale with signal polarity) of the first sub-pixel in the n-th row and the 1st column.

[0138] Next, when determining the first charge change amount, the difference between the signal difference and each second grayscale voltage can be calculated, and the sum of the differences is used as the first charge change amount. Exemplarily, the first charge change amount can be calculated according to the following formula (3):

[0139] ΔQ = (G1 n+1 -G Qave )+(G2 n+1 -G Qave )+(G3 n+1 -G Qave )+…+(Gm n+1 -

[0140] G Qave ) Formula (3);

[0141] Wherein, in formula (3), ΔQ represents the first charge change amount, that is, the sum of the charge amount changes brought about by charge sharing.

[0142] As described above, if the display target charge is less than the driving charge threshold and the first charge change amount is less than the change amount threshold, it means that the charge neutralization effect is good and the power consumption is low. Therefore, charge sharing can be performed on multiple source signals; otherwise, in order to save power, some source signals that can perform charge sharing can be selected from multiple source signals. Then, when the target charge is not less than the driving charge threshold or the first charge change amount is not less than the change amount threshold, multiple target source signals can be further selected.

[0143] When screening out multiple target source signals, multiple source signals can be divided to divide multiple source lines into multiple groups. Among them, each group can include two or three or more source lines. Thus, segmented charge sharing is performed on the sub-pixels in a row, thereby improving the granularity of charge sharing and the fineness of power consumption control.

[0144] Specifically, multiple columns of the source signals can be divided into multiple signal groups based on the target charge amount and the first charge change amount; and for each signal group, the target source signal can be determined from within the signal group based on the first gray-scale voltage of the first sub-pixel and the second gray-scale voltage of the second sub-pixel in the signal group.

[0145] When dividing multiple source signals, if the display target charge is less than the driving charge threshold and the first charge change amount is less than the change amount threshold, it can be determined that charge sharing can be performed between adjacent source signals. Thus, two adjacent source signals form a signal group, and charge sharing is performed between the source signals within the signal group. If the target charge is not less than the driving charge threshold or the first charge change amount is not less than the change amount threshold, the scale of dividing the source signals can be expanded. For example, three or more source signals can be divided into a group. Thus, when the signal group includes three or more source signals, there are multiple charge sharing strategies, and under different charge sharing strategies, different multiple source signals within the signal group will perform charge sharing.

[0146] In a further example, when the target charge amount is less than the first preset value and the first charge change amount is less than the second preset value, multiple columns of source signals are divided into multiple first signal groups; where each first signal group includes two columns of source signals that are adjacent in position. When the target charge amount is not less than the first preset value or the first charge change amount is greater than or equal to the second preset value, multiple columns of source signals are divided into multiple second signal groups; where each second signal group includes at least three columns of source signals that are adjacent in position.

[0147] Among them, the first preset value can be the above-mentioned driving charge threshold, and the second preset value is the above-mentioned change amount threshold. Among them, when the target charge amount is not less than the first preset value or the first charge change amount is greater than or equal to the second preset value, the number of source signals included in each signal group can be further determined according to the difference between the target charge amount and the first preset value, and the difference between the first charge change amount and the second preset value. For example, the greater the difference, the more source signals are included.

[0148] Among them, when multiple second signal groups are obtained by division, the number of source signals included in each second signal group can be the same, or the number of source signals in some second signal groups is the same, while the number of source signals in the remaining second signal groups is different. Of course, to improve the calculation efficiency, multiple source signals can be evenly divided to obtain multiple second signal groups.

[0149] Among them, when each signal group is divided, according to the first gray-scale voltage of the first sub-pixel and the second gray-scale voltage of the second sub-pixel in the signal group, the total charge required to drive the second sub-pixel to reach the second display gray-scale under different charge sharing strategies, and the sum of the second charge change amounts of the first sub-pixel before and after charge neutralization can be determined. According to the total charge and the sum of the second charge change amounts, it can be determined which charge sharing strategy is optimal, and then the source signal for charge sharing under the optimal charge sharing strategy can be determined as the target source signal.

[0150] Specifically, according to the first gray-scale voltage of the first sub-pixel and the second gray-scale voltage of the second sub-pixel in the signal group, the process of determining the total charge required to drive the second sub-pixel to reach the second display gray-scale under different charge sharing strategies, and the sum of the second charge change amounts of the first sub-pixel before and after charge neutralization can refer to the formulas (1)-(3) shown above.

[0151] Among them, since there can be different division methods when multiple signal groups are divided. For example, if divided into the above-mentioned first signal group, each column of source signals can be the target source signal; if divided into the above-mentioned second signal group, the target source signal to be charge-shared needs to be determined from within the second signal group. As described above, in this case, it is necessary to determine the charge amount required to drive the second sub-pixel and the second charge change amount before and after charge neutralization under different charge sharing strategies within the second signal group.

[0152] In specific implementation, when the signal group includes at least three adjacent columns of source signals, based on the first gray-scale voltage of the first sub-pixel and the second gray-scale voltage of the second sub-pixel, predict the second charge change amount within the signal group under different charge sharing strategies, and based on the second charge change amount, determine the target source signal;

[0153] Among them, different charge sharing strategies correspond to charge sharing of different multiple source signals within the signal group. Refer to Figure 6 As shown, a schematic diagram of different charge sharing strategies in the second signal group is shown. As Figure 6 shown, the second signal group includes three source lines, such as the first column source line, the second column source line, and the third column source line. Among them, one charge sharing strategy 1 is that the source signals on the second column source line and the third column source line are charge-shared (the switching element between the second column source line and the third column source line is turned on), one charge sharing strategy 2 is that the source signals on the first column source line and the second column source line are charge-shared (the switching element between the first source line and the second column source line is turned on), and another charge sharing strategy 3 is that the source signals on the first column source line, the second column source line, and the third column source line are all charge-shared (the switching element between the third source line and the second column source line is turned on and the switching element between the first column source line and the second column source line is turned on).

[0154] In this example, when predicting the amount of change in the second charge within the signal group under different charge sharing strategies for the second signal group, candidate source signals for charge sharing within the signal group can be determined. Based on the first gray-scale voltage of the first sub-pixel targeted by the candidate source signal and the second gray-scale voltage of the second sub-pixel targeted by the candidate source signal, a third difference is determined; based on the third difference, the amount of change in the second charge is determined.

[0155] In specific implementation, for each charge sharing strategy, candidate source signals for charge sharing in that charge sharing strategy can be determined; the difference in gray-scale changes brought by the candidate source signal to the first sub-pixel and the second sub-pixel is predicted, that is, the third difference. Among them, each charge sharing strategy corresponds to a source signal for charge sharing, so the third difference corresponding to the candidate source signal after charge sharing can be determined. Here, the third difference can refer to the absolute value of the difference in gray-scale voltages between the target first sub-pixel driven by the candidate source signal and the target second sub-pixel in the same column as the target first sub-pixel. Specifically, the absolute value between the first gray-scale voltage of the target first sub-pixel and the second gray-scale voltage of the target second sub-pixel can be determined, and then, according to its signal polarity, the absolute value is operated on to obtain the third difference. Then, based on the third difference, the amount of change in the second charge can be determined. Exemplarily, if the signal polarity of the second sub-pixel is negative polarity, the negative of the absolute value is the third difference; if the signal polarity of the second sub-pixel is positive polarity, the positive of the absolute value is the third difference.

[0156] In one example, when determining the amount of change in the second charge for driving the first sub-pixel and the second sub-pixel before and after charge sharing of the candidate source signal based on the third difference, the amount of change in the gray-scale voltage between the candidate source signals for sharing can be determined according to the third difference, such as the amount of change in the gray-scale voltage between the candidate source signal in the i-th column and the candidate source signal in the (i + 1)-th column.

[0157] Exemplarily, as Figure 6 shown, each charge sharing strategy can correspond to its own calculation method for the third difference:

[0158] Charge sharing strategy 1: The source signals on the second source line and the third source line perform charge sharing, then it can be determined according to the following formula (4):

[0159] G ave =|G2 n+1 -G2 n |+|G3 n+1 -G3 n | Formula (4)

[0160] Charge sharing strategy 2: The source signals on the first source line and the second source line perform charge sharing, then it can be determined according to the following formula (5):

[0161] G ave = |G1 n+1 - G1 n | - |G2 n+1 - G2 n | Equation (5)

[0162] Charge sharing strategy 3: Source signals on the first column source line, the second column source line, and the third column source line all perform charge sharing, and can be determined according to the following Equation (6):

[0163] G ave = |G1 n+1 - G1 n | - |G2 n+1 - G2 n | + |G3 n+1 - G3 n | Equation (6)

[0164] Wherein, G ave represents the gray-scale change amount.

[0165] Next, based on the third difference corresponding to each charge sharing strategy, the second charge change amount for driving the first sub-pixel and the second sub-pixel before and after charge sharing of the candidate source signal can be determined. When determining, the third difference brought about by the charge sharing of the candidate source signal can be calculated first, and then, the gray-scale voltage difference between the source signals without charge sharing, that is, the gray-scale voltage difference between the first sub-pixel and the second sub-pixel without charge sharing and in the same column (the difference between the display gray-scales with polarity) can be calculated. Assuming that this gray-scale voltage difference is called the fourth difference, then the sum of the third difference and the fourth difference can be used as the second charge change amount.

[0166] Exemplarily, as Figure 6 shown, the second charge change amount corresponding to each charge sharing strategy in the signal group can be determined according to the following Equation (7):

[0167]

[0168] Wherein, ΔQ1 is the second charge change amount corresponding to charge sharing strategy 1, ΔQ2 is the second charge change amount corresponding to charge sharing strategy 2, and ΔQ3 is the second charge change amount corresponding to charge sharing strategy 3.

[0169] Thus, based on the magnitudes of the second charge change amounts corresponding to multiple charge sharing strategies, it can be determined which charge sharing strategy is more conducive to reducing the power consumption of the liquid crystal display panel.

[0170] In one example, based on the change value of the charge quantity and a preset charge quantity change threshold, a target charge sharing strategy can be determined from multiple charge sharing strategies; the source signal for charge sharing in the target charge sharing strategy is used as the target source signal.

[0171] In this example, the magnitude relationship between the change value of the charge quantity corresponding to each charge sharing strategy and the preset charge quantity change threshold can be compared. The charge sharing strategy for which the corresponding change value of the charge quantity is less than or equal to the preset charge quantity change threshold is used as a candidate charge sharing strategy. If there are multiple candidate charge sharing strategies, the candidate charge sharing strategy with the smallest change value of the charge quantity can be used as the target charge sharing strategy.

[0172] Exemplarily, as Figure 6 shown, assuming that the preset charge quantity change threshold is 0, if it is calculated that ΔQ1 is greater than 0, it indicates an increase in loading and an increase in power consumption, and if ΔQ2 and ΔQ3 are less than 0, it indicates that charge sharing reduces the power consumption. Then, the one with the smallest absolute value can be selected from ΔQ2 and ΔQ3 as the target charge sharing strategy. If ΔQ2 is the target charge sharing strategy, the source signals on the second column source line and the third column source line in the signal group perform charge sharing.

[0173] According to the above process, the charge sharing strategy in each signal group can be determined in sequence. It can be understood that when divided into multiple second signal groups, the charge sharing strategies corresponding to different second signal groups can be different, or some second signal groups have the same charge sharing strategy, while the remaining second signal groups have different charge sharing strategies.

[0174] In some embodiments, the flipping mode may include a column flipping mode, a row flipping mode, and a dot flipping mode. Although the above method is applicable to each flipping mode, in order to more finely control the power consumption, when determining the target source signal for charge sharing, according to different flipping modes, the first gray-scale voltage level and the second gray-scale voltage can be processed according to the logic corresponding to the flipping mode, so as to finally determine the target source signal suitable for charge sharing in the flipping mode of the liquid crystal display panel. In this way, by selecting an appropriate calculation logic to determine the target source signal according to the flipping mode of the liquid crystal display panel, the reduction of power consumption can be matched with the flipping mode of the liquid crystal display panel, and the power consumption control is more refined.

[0175] Specifically, the flipping mode corresponding to the liquid crystal display panel can be determined. The flipping mode includes a column flipping mode, a row flipping mode, and a dot flipping mode; then, based on the difference between the flipping mode, the first display gray scale and the second display gray scale, and the signal polarities corresponding to the first sub-pixel and the second sub-pixel respectively, the target source signal can be determined.

[0176] In this embodiment, when the flipping method is the row flipping method and the column flipping method, based on the first difference between the first sub-pixel and the second sub-pixel, it can be determined whether the display signal of the nth row meets the charge sharing condition. If so, then based on the first gray-scale voltage and the second gray-scale voltage, it is predicted that under the charge sharing of multiple source signals, the target charge amount required to drive multiple second sub-pixels to reach the second display gray-scale, as well as the first charge change amount brought by the charge sharing, and based on the target charge amount and the first charge change amount, the target source signal is determined.

[0177] Among them, the process of determining the target source signal based on the target charge amount and the first charge change amount can refer to the above example and will not be elaborated here.

[0178] Among them, in the dot flipping method, since each pixel in each row on the source line needs to update the point where the overvoltage is zero when being updated, in order to simplify the algorithm and ensure the maximum power saving effect, neutralizing the positive and negative polarities of the entire row of pixels to zero is the optimal charge sharing scheme. However, for more refined control and maximum power saving, the difference in gray-scale voltage between the second sub-pixels and the first sub-pixels in the same column can be determined. Then, according to the difference in gray-scale voltage, it is successively determined which source signals need to perform charge sharing.

[0179] Refer to Figure 7 As shown, it shows another schematic diagram of the step flow for determining the target source signal. As Figure 7 described, it specifically may include the following steps:

[0180] Step 1: Based on the first gray-scale voltage of the first sub-pixels in the m columns of source signals and the second gray-scale voltage of the second sub-pixels, predict the sum of the second charge change amounts between the first sub-pixels and the second sub-pixels in the state of charge sharing of the m columns of source signals;

[0181] Step 2: Determine whether the third charge change amount is less than the third preset value; if so, execute Step 3, if not, execute Step 4:

[0182] Step 3: Add one column of source signals and repeat the above Step 1 and Step 2 until the third charge change amount is greater than the third preset value. Take the first M - 1 columns of source signals among the M columns of source signals when the third charge change amount is greater than the third preset value as the target source signals, and take the Mth column of source signals as the non-charge-sharing source signals;

[0183] Step 4: Take the m columns of source signals as the non-charge-sharing source signals and start repeating the above Step 1 and Step 2 from the (m + 1)th column of source signals.

[0184] Among them, the first gray-scale voltage is determined by the signal polarity of the first sub-pixel and the first display gray-scale, and the second gray-scale voltage is determined by the signal polarity of the second sub-pixel and the second display gray-scale.

[0185] In this example, the display signal of the nth row can be stored in the line buffer. Then, the display signal of the (n + 1)th row is obtained. The first display gray level of each first sub-pixel is determined according to the display signal of the nth row, and the second display gray level of each second sub-pixel is determined according to the display signal of the (n + 1)th row. Among them, the difference between the first gray level voltage of m first sub-pixels and the second gray level voltage of m second sub-pixels can be calculated first. It should be noted that this difference is the absolute value of the difference between the first gray level voltage and the second gray level voltage, that is, a positive value. Exemplarily, the first gray level voltage of the first sub-pixel in the ith column is Gi n , and the second gray level voltage of the second sub-pixel in the (i + 1)th column is Gi n+1 , then the difference between the two = |Gi n+1 - Gi n |. Then, the sum of the differences in gray level voltages can be used as the third charge change amount. Exemplarily, the third charge change amount is ΔQ4, where:

[0186] ΔQ4 = |G1 n+1 - G1 n | + |G2 n+1 - G2 n | +..... + |Gm n+1 - Gm n | Formula (8).

[0187] Among them, if the third charge change amount is less than the third preset value, it can be characterized that the power consumption can be reduced when charge sharing occurs among m source signals. Therefore, the second charge change amount on the (m + 1)th column source signal can be further determined, that is, the third charge change amount corresponding to the first m + 1 column source signals is determined. If the third charge change amount corresponding to the first m + 1 column source signals is less than the third preset value, then the third charge change amount corresponding to the first m + 2 column source signals is determined, and so on, until it is determined that the third charge change amount corresponding to the first M column source signals is greater than the third preset value. At this time, the (M - 1)th column source signal can be used as the target source signal, and the Mth column source signal can be used as the non-charge sharing source signal. Among them, it should be noted that the third preset value is different from the second preset value. The second preset value can be 0, but the third preset value can be a non-zero value.

[0188] Exemplarily, when m = 3 and it is determined that the third charge change amount corresponding to the first 3 column source signals is less than the third preset value, then continue to determine the third charge change amount corresponding to the first 4 column source signals. If the third charge change amount corresponding to the first 4 column source signals is greater than the third preset value, it can be determined that the first 3 column source signals can perform charge sharing, while the 4th column source signal does not perform charge sharing. At this time, starting from the 5th column source signal, the above steps 1 and 2 can be repeated.

[0189] Among them, if the change amount of the third charge is greater than or equal to the third preset value, it can indicate that the power consumption increases when charge sharing occurs among the m source signals. Therefore, the m source signals can be regarded as source signals that cannot perform charge sharing. Thus, starting from the (m + 1)-th source signal, the above-mentioned steps 1 and 2 are repeated, and so on, until all the multiple source signals in the n-th row are confirmed; for example, including J columns of source signals, after all the J columns of source signals are confirmed whether they can perform charge sharing, the calculation of the display signals in the n-th row ends.

[0190] Through the above steps, the target source signals participating in charge sharing can be determined in sequence. When determining in this way, it can be accurate to the charge sharing between each sub-pixel, so as to accurately control the power consumption.

[0191] Of course, in some other embodiments, the process of determining the target source signals can be implemented by a timing control chip in the liquid crystal display panel. Since calculating the difference between the first display gray level and the second display gray level is required to determine the target source signals, a certain computing power is required from the timing control chip. In some examples, if the performance of the timing control chip is good, more refined control can be achieved. For example, the display area of the liquid crystal display panel can be partitioned, and for each partitioned display area, the target source signals in the display area are determined. If the performance of the timing control chip is average, the display area does not need to be partitioned for determination.

[0192] During specific implementation, the current performance parameters of the timing control chip can be determined; and based on the performance parameters, multiple source signal columns are partitioned to obtain multiple third signal groups; for each third signal group, based on the first display gray level of the first sub-pixel, the second display gray level of the second sub-pixel, and the signal polarity in the third signal group, the target source signals are determined in the third signal group.

[0193] In this embodiment, the current performance parameters of the timing control chip can include parameters such as the available storage space of the chip, the operation rate, and the cached display data. According to the current performance parameters, the current computing power of the timing control chip can be determined. If the computing power is high, such as the available storage space and the cached display data are both lower than their respective corresponding thresholds, and the operation rate is high, then multiple source signal columns can be partitioned into a larger number of third signal groups; if the computing power is low, such as the available storage space and the cached display data are both higher than their respective corresponding thresholds, and the operation rate is low, then multiple source signal columns can be partitioned into a smaller number of third signal groups.

[0194] It should be noted that the division of the source signal in this example can be understood as the division of the display area of the liquid crystal display panel. After the division, each third signal group corresponds to a sub-display area. In this sub-display area, the target source signal that needs to perform charge sharing can be determined in each row of display signals in this sub-display area according to the above process of determining the target source signal.

[0195] Among them, as the liquid crystal display panel is used, the current performance parameters of the timing control chip are not fixed but dynamically change. Therefore, during the use of the liquid crystal display panel, the results of dividing multiple columns of source signals can be different. As a result, the process of determining the target source signal can match the current computing power of the timing control chip, thereby ensuring the driving efficiency of the sub-pixels and ensuring the normal display of the liquid crystal display panel.

[0196] Among them, for different sub-display areas, the process of determining the target source signal can be the same. Combining the above example, in the process of determining the target source signal, it can be determined based on the target charge amount and the first charge change amount. The target charge amount and the first charge change amount can be used to determine the division method of multiple source signals. When determining the division method, the first preset value and the second preset value are relied on. In one example of this embodiment, each divided sub-display area can correspond to its own first preset value and second preset value. Among them, due to the manufacturing process of the liquid crystal display panel, there may be differences in the performance of the thin film transistors in the sub-display areas. For example, some thin film transistors in the sub-display areas require more gray-scale voltages to achieve normal gray-scale representation, while some thin film transistors in the sub-display areas require fewer gray-scale voltages to achieve normal gray-scale representation. Therefore, the corresponding first preset value and second preset value can be determined according to the overall driving performance of multiple thin film transistors in the sub-display area. Specifically, it can be set according to the actual situation and will not be elaborated here.

[0197] Similarly, in the process of determining the target source signal, if it is the dot inversion method or the line inversion method, the target source signal for charge sharing can be obtained cyclically. It mainly depends on the magnitude relationship between the third charge change amount corresponding to m columns of source signals and the third preset value. Each sub-display area can also set its own corresponding third preset value. For example, there are differences between the third preset values of the sub-display areas, so as to achieve precise power consumption control.

[0198] In some other embodiments, the liquid crystal display panel may include multiple source driver chips, and each source driver chip is connected to some of the multiple source lines. That is to say, different source driver chips can input gray-scale voltages to the source lines in different display areas. In this way, when determining the target source signal, it can be carried out for the display area driven by each source driver chip. Therefore, the refinement degree of power consumption control can be improved.

[0199] In specific implementation, the display signal of the nth row can be divided into sub-display signals corresponding to each source driver chip, and the target source signal is determined from the sub-display signals based on the first display gray level of the first sub-pixel, the second display gray level of the second sub-pixel, and the signal polarity in the sub-display signals.

[0200] In this example, since there are multiple source driver chips, one source driver chip is connected to a part of the source lines in the liquid crystal display panel and is used to output gray level voltages to the part of the source lines. For example, the resolution of the liquid crystal display panel is 1280*720, including 1280 source lines and 720 gate lines. Among them, there are 4 source driver chips, and each source driver chip is connected to 320 source lines. When driving, one source driver chip is used to sequentially input gray level voltages to 320 source lines.

[0201] When the display signal of the nth row arrives, the display signal of the nth row can be divided into multiple sub-display signals according to the source lines connected to each source driver chip. Each sub-display signal includes multiple source signals, and the multiple source signals respectively correspond to a part of the source lines in the liquid crystal display panel.

[0202] Of course, the display signal of the (n + 1)th row also needs to be divided to target the first display gray level of the first sub-pixel and the second display gray level of the second sub-pixel of each source driver chip.

[0203] When determining the target source signal, the target source signal can be determined from each sub-display signal, that is, the source signal that needs charge sharing is determined separately for each source driver chip. Specifically, the determination process can refer to the process in the above example. For example, based on the first display gray level of the first sub-pixel in the sub-display signal of the nth row display signal, the second display gray level of the second sub-pixel in the sub-display signal of the (n + 1)th row display signal, and the signal polarities of each sub-pixel, the target source signal is determined from the sub-display signal of the nth row display signal.

[0204] In one example, due to different source driver chips, there may be differences in their driving performances. For example, the power consumption of one source driver chip is relatively low, while the power consumption of another source driver chip is relatively high. When determining the target source signal that needs charge sharing for each source driver chip, an appropriate first preset value, second preset value, and third preset value can be set for each source driver chip.

[0205] Combined with the above example, when determining the target source signal based on the target charge amount and the first charge change amount, when dividing multiple columns of source signals into multiple signal groups based on the target charge amount and the first charge change amount, at this time, it is necessary to rely on the magnitude relationship between the target charge amount and the first preset value, and the first charge change amount and the second preset value. Here, for different source driver chips, according to their own driving performance, the corresponding first preset value and second preset value for each source driver chip can be set in advance.

[0206] Exemplarily, if the driving performance of the source driver chip is good and its power consumption is low, the first preset value can be appropriately set higher, so that the tolerance for the contribution of charge sharing to power consumption reduction becomes higher. That is to say, even if the contribution of charge sharing to power consumption reduction is not large, due to the low power consumption of the source driver chip itself, charge sharing can still be carried out.

[0207] Among them, if the driving performance of the source driver chip is poor and its power consumption is high, the first preset value can be appropriately set lower, so that the tolerance for the contribution of charge sharing to power consumption reduction becomes lower. That is to say, charge sharing is carried out when the contribution of charge sharing to power consumption reduction is large. Exemplarily, when the second preset value is low, in most cases, the source signal will be divided into multiple second signal groups, thereby achieving more refined power consumption control, so as to minimize the power consumption of the source driver chip.

[0208] Similarly, in the process of determining the target source signal, if it is the dot inversion method or the line inversion method, the target source signal of charge sharing can be obtained by cycling, mainly based on the magnitude relationship between the third charge change amount corresponding to m columns of source signals and the third preset value. Each source driver chip can also set its own corresponding third preset value. For example, there are differences in the third preset values of source driver chips, so as to achieve precise power consumption control.

[0209] In a further example of this embodiment, the display area targeted by each source driver chip can be further divided. For example, the display area is divided into multiple sub-display areas, and each sub-display area includes multiple consecutive adjacent source lines. Thus, according to this division, the sub-display signals of each source driver chip can be divided to obtain multiple target sub-display signals; and based on the difference between the first display gray level of the first sub-pixel and the second display gray level of the second sub-pixel in the target sub-display signal, as well as the signal polarity, the target source signal is determined from the target sub-display signal.

[0210] Among them, the division of the sub-display signals can be determined according to the current performance parameters of the timing control chip. For example, if the current performance parameters indicate that the performance of the timing control chip is low, the sub-display signals may not be divided. If the current performance parameters indicate that the performance of the timing control chip is high, the sub-display signals may be divided.

[0211] It should be noted that for each target sub-display signal, corresponding first preset value, second preset value and third preset value can also be set. In this case, for the same source driver chip, the first preset value, second preset value and third preset value adapted to its driving performance can be set according to the driving performance of the thin film transistors in the display area it targets, so that the power consumption control not only adapts to the driving performance of the source driver chip, but also adapts to the driving performance of the thin film transistors, improving the fineness of power consumption control.

[0212] It should be noted that the determination of the first preset value in the above example can be as follows:

[0213] Among them, when the target charge amount SumQ = 0, it means that when outputting the display signal of the n + 1th row, theoretically the source driver chip does not need to provide charge and the power consumption is the lowest. However, in practice, since the accumulated value of the data charges of the display signals of the previous n rows cannot be accurately 0, this first preset value needs to be set so that the power consumption loss is within the minimum range. If the first preset value is set too high, the power consumption saving efficiency is poor. If the first preset value is set too low, the threshold may not be reached. In practice, this first preset value can be debugged by comprehensively considering the power consumption saving situation and the display effect during the debugging of the liquid crystal display panel. In practice, after obtaining the first preset value through debugging, this first preset value can be debugged according to the power consumption saving situation and the display effect of the source driver chip. Since the power consumption performance of different source driver chips is different, different source driver chips can correspond to different first preset values.

[0214] Among them, the third preset value is the set threshold relied on in the determination process of another target source signal, and the determination process of its third preset value can be the same as that of the first preset value, which will not be elaborated here.

[0215] Next, several examples are combined to exemplarily illustrate the above driving method:

[0216] Example 1, for the liquid crystal display panel A with column inversion mode

[0217] Refer to Figure 8 As shown, the driving circuit diagram of the liquid crystal display panel A is shown. As Figure 8As shown, the liquid crystal display panel A includes two source driver chips, namely source driver chip 1 and source driver chip 2. Each row of the liquid crystal display panel A includes 1920 sub-pixels, and each source driver chip is connected to 960 sub-pixels. For the 960 sub-pixels connected to each source driver chip, the process of determining the target source signal refers to Figure 9 as shown, and specifically may include the following processes:

[0218] S1: Receive the display signal of the nth row transmitted by the system-on-chip (SoC) of the liquid crystal display panel A. The display signal of the nth row is the display data of the first sub-pixel in the nth row; and, receive the display signal of the (n + 1)th row transmitted by the SoC. The display signal of the (n + 1)th row is the display data of the sub-pixel in the (n + 1)th row.

[0219] S2: Divide the display signal of the nth row into two first sub-display signals, and divide the display signal of the (n + 1)th row into two second sub-display signals. Among them, one first sub-display signal A1 and one second sub-display signal B1 correspond to the 960 columns of pixels connected to source driver chip 1; the other first sub-display signal A2 and one second sub-display signal B2 correspond to the 960 columns of pixels connected to source driver chip 2.

[0220] S3: For each first sub-display signal and second sub-display signal, determine the target source signal that needs to perform charge sharing in the first sub-display signal. The process is as follows:

[0221] Since it is a column flipping method, considering that the signal polarities of the gray-scale voltages of the sub-pixels in one column are the same, the first display gray-scale of the 960 sub-pixels in the nth row can be determined according to the display signal of the nth row, and the second display gray-scale of the 960 sub-pixels in the (n + 1)th row can be determined based on the display signal of the (n + 1)th row; and determine the difference between the first display gray-scale of the 960 sub-pixels in the nth row and the second display gray-scale of the 960 sub-pixels in the (n + 1)th row; if the difference between the first display gray-scale of the 960 sub-pixels in the nth row and the second display gray-scale of the 960 sub-pixels in the (n + 1)th row is very small, such as less than 1 gray-scale or 10 gray-scales, then execute step S4. Otherwise, start to execute step S5:

[0222] S4: Do not perform charge neutralization. Thus, it is determined that the switching elements between 960 source lines are all in the off state.

[0223] S5: According to the display data of the (n + 1)th row and the nth row in the row buffer, predict the target charge amount required to drive multiple second sub-pixels to reach the second display gray-scale after charge sharing of 960 source signals, and the first charge change amount of the corresponding charge amount change of multiple first sub-pixels.

[0224] The calculation process of its target charge amount is as follows:

[0225] First, determine the second difference between the first grayscale voltage (the first display grayscale with polarity) and the second grayscale voltage (the second display grayscale with polarity) in the same column, and take the mean of multiple second differences as the signal difference G Qave , which is carried out through the following formula (1):

[0226]

[0227] where G1 n+1 ~Gm n+1 is the second display grayscale with polarity, and G1 n ~Gm n is the first display grayscale with polarity. In this example, m is at most 960.

[0228] Next, according to the signal difference and the difference between multiple second grayscale voltages, determine the target charge amount SumQ required to drive the second sub-pixel in the (n + 1)-th row, which is carried out through the following formula (2):

[0229] SumQ = |G1 n+1 - G Qave | + |G2 n+1 - G Qave | + |G3 n+1 - G Qave | + … + |Gm n+1 - G Qave | Formula (2);

[0230] where G1 n+1 is the second display grayscale with polarity. If it is a negative polarity, the second display grayscale is a negative number.

[0231] The calculation process of its first charge change amount is as follows:

[0232] According to the grayscale change amount G Qave , and the difference between multiple second grayscale voltages, determine the first charge change amount ΔQ caused by charge sharing, which is carried out through the following formula (3):

[0233] ΔQ = (G1 n+1 - G Qave ) + (G2 n+1 - G Qave ) + (G3 n+1 - G Qave ) + … + (Gm n+1 - G Qave ) Formula (3);

[0234] S6: When ΔQ < 0 and SumQ is less than the set threshold (the first preset value) corresponding to the current source chip, it is determined that charge sharing between adjacent source signals can reduce power consumption and has excellent effects. Then, it is determined that 2 sub-pixels form a charge sharing unit, and the source signals on the two source lines connected to each switching element are used as the target source signals; otherwise, go to S7. Here, 0 is the second preset value in the above example, and the set threshold is the first preset value. Among them, the driving performance of source driver chip 1 is relatively high and it is more power-saving, so the first preset value is relatively high. The driving performance of source driver chip 2 is relatively low and it is more power-consuming, so the first preset value is relatively low.

[0235] S7: Regarding 3 sub-pixels in one row as a charge sharing unit, that is, 3 columns of source signals as a signal group. According to all the charge sharing strategies of the above 3 sub-pixels, calculate the second charge change amount of driving the first sub-pixel and the second sub-pixel in the second signal group under each charge sharing strategy. The calculation process is as follows:

[0236] First, based on the first gray-scale voltage of the first sub-pixel and the second gray-scale voltage of the second sub-pixel, calculate the third difference between the sub-pixels for charge sharing, and the calculation is carried out through the following formula:

[0237]

[0238] In the formula, G1 ave is the third difference between the sub-pixels for charge sharing in charge sharing strategy 1, G2 ave is the third difference between the sub-pixels for charge sharing in charge sharing strategy 2, G3 ave is the third difference between the sub-pixels for charge sharing in charge sharing strategy 3.

[0239] It should be noted that when obtaining the third difference, the polarity of the third difference needs to be determined according to the signal polarity of the second sub-pixel. For example, if the second sub-pixel is of negative polarity, the third difference is negative.

[0240] Next, calculate the second charge change amount of driving the first sub-pixel and the second sub-pixel before and after charge sharing of the candidate source signals, and the calculation is carried out through the following formula:

[0241]

[0242] Among them, ΔQ1 is the third difference between the sub-pixels for charge sharing in charge sharing strategy 1, ΔQ2 is the third difference between the sub-pixels for charge sharing in charge sharing strategy 2, and ΔQ3 is the third difference between the sub-pixels for charge sharing in charge sharing strategy 3.

[0243] After calculation, if ΔQ>0, it indicates an increase in power consumption; if ΔQ<0, it indicates that charge sharing reduces power consumption. Compare ΔQ for the three methods, and select the one with ΔQ<0 and the smallest absolute value as the optimal charge sharing strategy, and output the switching results of the switching elements. After calculation, if ΔQ1 is greater than 0, it indicates an increase in power consumption. For example, if ΔQ2 and ΔQ3 are less than 0, it indicates that charge sharing reduces power consumption, then the one with the smallest absolute value can be selected from ΔQ2 and ΔQ3 as the target charge sharing strategy. If ΔQ2 is the target charge sharing strategy, then the source signals on the first column source line and the second column source line in the signal group perform charge sharing.

[0244] S8: According to the process of S7, determine the optimal charge sharing strategy for reducing power consumption in each second signal group, and obtain multiple target source signals.

[0245] S9: Send the multiple target source signals respectively determined in the two first sub-display signals to source driver chip 1 and source driver chip 2 respectively, so that the source driver chips can control charge sharing between the target source signals.

[0246] Example 2, for the liquid crystal display panel B in the dot inversion mode

[0247] The liquid crystal display panel B includes three source driver chips. The liquid crystal display panel B has 1920 sub-pixels in the row direction, and each source driver chip is connected to 640 sub-pixels. For the 640 sub-pixels connected to each source driver chip, the process of determining the target source signal refers to Figure 10 as shown, and specifically may include the following process:

[0248] S1': Receive the display signal of the nth row transmitted by the system-on-chip SoC of the liquid crystal display panel B. The display signal of the nth row is the display data of the first sub-pixel in the nth row; and receive the display signal of the (n + 1)th row transmitted by the SoC. The display signal of the (n + 1)th row is the display data of the sub-pixel in the (n + 1)th row.

[0249] S2': Divide the display signal of the nth row into three first sub-display signals, and divide the display signal of the (n + 1)th row into three second sub-display signals. Among them, one first sub-display signal A1 and one second sub-display signal B1 correspond to the 640 columns of pixels connected to source driver chip 1; another first sub-display signal A2 and one second sub-display signal B2 correspond to the 640 columns of pixels connected to source driver chip 2; another first sub-display signal A3 and one second sub-display signal B3 correspond to the 640 columns of pixels connected to source driver chip 3.

[0250] S3': For each first sub-display signal and second sub-display signal, determine the target source signal that needs to perform charge sharing in the first sub-display signal, as Figure 10 shown (Figure 10 (The process of dividing the display signal is not shown in the figure), and the process is as follows:

[0251] According to the signal polarity of the current second sub-pixel, if the signal polarity of the current second sub-pixel is positive, the charge amount needs to be increased, ΔQ takes a positive value. On the contrary, if the signal polarity of the current second sub-pixel is negative, the charge amount needs to be decreased, ΔQ takes a negative value. For the charge amounts of the first m sub-pixels in the nth row and the first m sub-pixels in the (n + 1)th row, the change amounts after charge sharing are summed to obtain the third charge change amount, which can be specifically calculated according to the following formula (8):

[0252] ΔQ4 = |G1 n+1 - G1 n | + |G2 n+1 - G2 n | +..... + |Gm n+1 - Gm n | Formula (8).

[0253] S4': Determine whether the summation result (the third charge change amount) is less than the set threshold (the third preset value) corresponding to the current source driver chip; the better the driving performance of the source driver chip, the higher the third preset value can be; specifically, if the third charge change amount is less than the set threshold, go to step S5', if the third charge change amount is greater than the set threshold, go to step S6'.

[0254] S5': Continue to calculate the charge change between the first sub-pixel and the second sub-pixel on the (m + 1)th source line, add this charge change to the summation result, and determine whether the added result is less than the third preset value; if so, record the number of sub-pixels m + 1 for summation, use the source signals on the (m + 1) source lines as the target source signals, and turn off the switching elements on the source lines corresponding to the (m + 2) source signals;

[0255] If not, record the number of sub-pixels m for summation, use the source signals on the m source lines as the target source signals, that is, the switching elements between the source lines corresponding to the m source signals are in the conducting state, and the switching elements on the source lines corresponding to the (m + 1) source signals are in the off state. Then, starting from the (m + 2)th source signal, repeat the above step S3', that is, calculate the third charge change amount when charge sharing between the (m + 2)th source signal and the (m + 3)th source signal, and determine whether this third charge change amount is less than the set threshold.

[0256] S6': Use the m-column source signals as the source signals without charge sharing, and starting from the (m + 1)th second sub-pixel, repeat the above steps S3' and S4' until summing to the 364th sub-pixel, or until the summation result is less than the set threshold, and end the calculation of this round.

[0257] S7': Output the target source signal determined when the calculation ends. Specifically, according to the position information of the source line corresponding to the target source signal and the state of the switching element, send it to the current source driver chip, so that the source driver chip controls the state of the switching element connected to the source line corresponding to the target source signal to be in the conducting state during the driving cycle of the nth row of sub-pixels.

[0258] Based on the same inventive concept, an embodiment of a display device is also proposed. Referring to Figure 11 as shown, a top view schematic diagram of the display device is shown. As Figure 11 shown, the display device may include a liquid crystal display panel, a source driver chip, and a timing control chip. The liquid crystal display panel includes a plurality of source lines and a plurality of gate lines. The plurality of source lines and the plurality of gate lines define a plurality of sub-pixels arranged in an array. Among them, the source driver chip is configured to output source signals to the plurality of source lines, and the timing control chip is connected to the source driver chip;

[0259] The timing control chip is configured to, based on the nth row display signal to be driven, obtain the first display gray levels of a plurality of first sub-pixels in the nth row and the second display gray levels of a plurality of second sub-pixels in the (n + 1)th row; and based on the first display gray levels, the second display gray levels, and the signal polarities corresponding to the first sub-pixels and the second sub-pixels respectively, determine the target source signals for charge sharing among the multi-column source signals of the nth row display signal; where n is a positive integer greater than or equal to 1;

[0260] The source driver chip is configured to control charge sharing among the target source signals during the driving cycle of the nth row display signal.

[0261] Of course, in addition to the above-mentioned source driver chip and timing control chip, the display device may further include a system-on-chip, which is used to process the incoming image data and generate display data for display based on the image data. The display data includes multiple rows of display signals, and each row of display signals may include the display gray levels of a plurality of sub-pixels included in that row. In this way, the display data may include the display gray levels of each sub-pixel; then, the system-on-chip may send the display data to the timing control chip, and the timing control chip determines the display timing of each row of display signals, determines the gray scale voltages of each sub-pixel, and based on the nth row display signal, the (n + 1)th row display signal, and the signal polarities of each sub-pixel, determines the target source signals to be charge shared in the nth row display signal. After determining the target source signals, the address information of the source lines corresponding to the target source signals can be determined. Then, the address information, display timing, and gray scale voltages are sent to the source driver chip.

[0262] The source driving chip drives the sub-pixels in the nth row according to the display timing and the gray-scale voltage. During the driving period, the switching element 400 connected to the source line corresponding to the target source signal can be in an on state.

[0263] When the display device drives multiple first sub-pixels in the nth row for display, based on the difference between the second display gray-scale of multiple second sub-pixels in the (n + 1)th row and the first display gray-scale of the first sub-pixels, and the signal polarities of each sub-pixel, the target source signal for charge sharing is determined among the multi-column source signals of the display signal in the nth row, and the target source signals are short-circuited during the driving period of the display signal in the nth row, so that charge sharing occurs among the multiple target source signals. Thus, when each row of sub-pixels is driven, charge sharing can be performed on the target source signals that can perform charge sharing based on the difference between the display gray-scales and the signal polarities. Thus, when each row of sub-pixels is driven, the source signals that can perform charge sharing can be correspondingly determined, thereby overall reducing the power consumption of the liquid crystal display panel.

[0264] In some examples, a switching element 400 is connected between two adjacent source lines among multiple source lines, where

[0265] The timing control chip is specifically configured to determine the switching state of each switching element based on the target source signal and send the switching state to the source driving chip;

[0266] The source driving chip is specifically configured to control the switching elements according to the switching states of the multiple switching elements, so that charge sharing occurs among the multiple target source signals.

[0267] The timing control chip can also determine the switching state of the switching element connected between the source lines based on the target source signal. For example, generally, when charge sharing occurs between two adjacent target source signals, the switching element between the source lines corresponding to the two target source signals is in an on state. And the switching element between the source lines corresponding to the source signals without charge sharing is in an off state.

[0268] In some examples, the display device may include multiple source driving chips, each source driving chip is connected to a part of the source lines among the multiple source lines, and the timing control chip is respectively connected to the multiple source driving chips;

[0269] Among them, the timing control chip is specifically configured to divide the display signal in the nth row into sub-display signals corresponding to each source driving chip; and determine the target source signal from the sub-display signals based on the difference between the first display gray-scale of the first sub-pixels and the second display gray-scale of the second sub-pixels in the sub-display signals, and the signal polarities.

[0270] In this example, the process of dividing the display signal of the nth row can be referred to the above example and will not be elaborated here.

[0271] In some examples, the timing control chip is further configured to determine the current performance parameters of the timing control chip; based on the performance parameters, divide the multi-column source signals to obtain a plurality of third signal groups; and, for each third signal group, based on the difference between the first display gray level of the first sub-pixel and the second display gray level of the second sub-pixel in the third signal group, and the signal polarity, determine the target source signal in the third signal group.

[0272] In this example, the process of dividing the display signal of the nth row can be referred to the above example and will not be elaborated here.

[0273] Each embodiment in this specification is described in a progressive manner. The key point of each embodiment is the difference from other embodiments. The same or similar parts among the embodiments can be referred to each other.

[0274] Finally, it should also be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent in such process, method, commodity or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of another identical element in the process, method, commodity or device including the element.

[0275] The above has introduced in detail a driving method, a display device, a device and a chip of a liquid crystal display panel provided by the present disclosure. Specific examples are used in this article to elaborate the principle and implementation manner of the present disclosure. The description of the above embodiments is only used to help understand the method and its core idea of the present disclosure; at the same time, for those of ordinary skill in the art, according to the idea of the present disclosure, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present disclosure.

[0276] Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include well-known knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and examples are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0277] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

[0278] As used herein, the terms "one embodiment", "an embodiment", or "one or more embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present disclosure. In addition, note that the examples of the phrase "in one embodiment" herein do not necessarily all refer to the same embodiment.

[0279] In the specification provided herein, a large number of specific details are set forth. However, it can be understood that the embodiments of the present disclosure can be practiced without these specific details. In some instances, well-known methods, structures, and technologies are not shown in detail so as not to obscure the understanding of this specification.

[0280] In the claims, any reference signs between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in the claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present disclosure can be implemented by means of hardware including several different elements and by means of a suitably programmed computer. In a unit claim listing several devices, several of these devices can be embodied by the same hardware item. The use of the words first, second, and third, etc. does not denote any order. These words can be interpreted as names.

[0281] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure and are not intended to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A driving method for a liquid crystal display panel, characterized in that, The liquid crystal display panel includes a plurality of sub-pixels arranged in an array, and the driving method includes: Based on the display signal of the nth row to be driven, obtaining the first display gray level of a plurality of first sub-pixels in the nth row and the second display gray level of a plurality of second sub-pixels in the (n + 1)th row; where n is a positive integer greater than or equal to 1; Based on the first display gray level, the second display gray level, and the signal polarities corresponding to the first sub-pixels and the second sub-pixels respectively, determining target source signals for charge sharing among multiple column source signals of the display signal of the nth row; During the driving period of the display signal of the nth row, controlling charge sharing among multiple target source signals; 2. The driving method according to claim 1, characterized in that, The determining the target source signals for charge sharing among multiple column source signals of the display signal of the nth row based on the first display gray level, the second display gray level, and the signal polarities corresponding to the first sub-pixels and the second sub-pixels respectively includes: Based on the signal polarities, determining a first difference between a first gray level voltage corresponding to the first display gray level of the first sub-pixels belonging to the same column and a second gray level voltage corresponding to the second display gray level of the second sub-pixels; Based on multiple first differences, determining whether the display signal of the nth row meets the charge sharing condition; If so, based on the first gray level voltage and the second gray level voltage, predicting a target charge amount required to drive multiple second sub-pixels and a first charge change amount brought about by the charge sharing when multiple source signals all perform charge sharing, and based on the target charge amount and the first charge change amount, determining the target source signals; 3. The driving method according to claim 2, characterized in that, The predicting the target charge amount required to drive multiple second sub-pixels to reach the second display gray level and the first charge change amount brought about by the charge sharing when multiple source signals perform charge sharing based on the first gray level voltage and the second gray level voltage includes: Based on the first gray level voltage and the second gray level voltage, determining a second difference between the first sub-pixels and the second sub-pixels in the same column; Based on multiple second differences, determining a signal difference between the display signal of the nth row and the display signal of the (n + 1)th row; Based on the absolute value of the difference between the signal difference and the second gray level voltage, determining the target charge amount; Based on the second difference and the second gray level voltage, determining the first charge change amount; 4. The driving method according to claim 2, characterized in that, The determining the target source signals based on the target charge amount and the first charge change amount includes: Based on the target charge amount and the first charge change amount, dividing multiple column source signals into multiple signal groups; For each signal group, based on the first gray level voltage of the first sub-pixels and the second gray level voltage of the second sub-pixels in the signal group, determining the target source signals within the signal group; 5. The driving method according to claim 4, characterized in that, The dividing multiple column source signals into multiple signal groups based on the target charge amount and the first charge change amount includes: When the target charge amount is less than the first preset value and the first charge variation is less than the second preset value, multiple columns of the source signals are divided into multiple first signal groups; wherein, two adjacent columns of source signals are included in each first signal group. When the target charge amount is not less than the first preset value, or the first charge variation is greater than or equal to the second preset value, multiple columns of the source signals are divided into multiple second signal groups; wherein, at least three adjacent columns of source signals are included in each second signal group.

6. The driving method according to claim 4, characterized in that, The determining of the target source signal from within the signal group based on the first gray-scale voltage of the first sub-pixel and the second gray-scale voltage of the second sub-pixel in the signal group includes: When the signal group includes two adjacent columns of source signals, each column of the source signals is determined as the target source signal. When the signal group includes at least three adjacent columns of source signals, the second charge variation of the signal group under different charge sharing strategies is predicted based on the first gray-scale voltage and the second gray-scale voltage within the signal group, and the target source signal is determined based on the second charge variation. Among them, different charge sharing strategies correspond to charge sharing among different multiple source signals within the signal group.

7. The driving method according to claim 6, characterized in that, The determining of the target source signal based on the second charge variation includes: Based on the second charge variation and a preset charge variation threshold, a target charge sharing strategy is determined from multiple charge sharing strategies. The source signals that perform charge sharing in the target charge sharing strategy are used as the target source signals.

8. The driving method according to claim 6, characterized in that, The predicting of the second charge variation of the signal group under different charge sharing strategies based on the first display gray-scale, the second display gray-scale, and the signal polarity within the signal group includes: Candidate source signals that perform charge sharing within the signal group are determined, and a third difference is determined based on the first gray-scale voltage of the first sub-pixel corresponding to the candidate source signals and the second gray-scale voltage of the second sub-pixel corresponding to the candidate source signals. Based on the third difference, the second charge variation is determined.

9. The driving method according to claim 1, characterized in that, The determining of the target source signal based on the first display gray-scale, the second display gray-scale, and the signal polarities of the first sub-pixel and the second sub-pixel respectively includes: Step 1: Based on the first gray-scale voltage of the first sub-pixel and the second gray-scale voltage of the second sub-pixel in the currently to-be-determined m columns of source signals, the third charge variation in the charge sharing state of the m columns of source signals is predicted; wherein, the first gray-scale voltage is determined by the signal polarity of the first sub-pixel and the first display gray-scale, and the second gray-scale voltage is determined by the signal polarity of the second sub-pixel and the second display gray-scale. Step 2: Determine whether the third charge variation is less than a third preset value. If so, add one column of source signal, and repeat the above Step 1 and Step 2 until the third charge variation is greater than the third preset value. The first M - 1 columns of source signals among the M columns of source signals when the third charge variation is greater than the third preset value are used as the target source signals, and the Mth column of source signals is used as the non-charge-sharing source signal; where M is greater than m. If not, use the m columns of source signals as the source signals without charge sharing, and repeat the above Step 1 and Step 2 starting from the (m + 1)-th column of source signals.

10. The driving method according to any one of claims 1-9, characterized in that, Determining a target source signal for charge sharing from among multiple columns of source signals of the display signal in the n-th row based on the first display gray level, the second display gray level, and the signal polarities corresponding to the first sub-pixel and the second sub-pixel respectively includes: Determining a flipping mode corresponding to the liquid crystal display panel, where the flipping mode includes a column flipping mode, a row flipping mode, and a dot flipping mode; Based on the flipping mode, the first display gray level, the second display gray level, and the signal polarities corresponding to the first sub-pixel and the second sub-pixel respectively, determining the target source signal.

11. The driving method according to any one of claims 1-9, characterized in that, The display panel includes a timing control chip. Determining a target source signal for charge sharing from among multiple columns of source signals of the display signal in the n-th row based on the first display gray level, the second display gray level, and the signal polarities corresponding to the first sub-pixel and the second sub-pixel respectively includes: Determining current performance parameters of the timing control chip; Based on the performance parameters, dividing multiple columns of source signals to obtain multiple third signal groups; For each of the third signal groups, determining the target source signal in the third signal group based on the first display gray level of the first sub-pixel, the second display gray level of the second sub-pixel, and the signal polarity in the third signal group.

12. The driving method according to any one of claims 1-9, characterized in that, The liquid crystal display panel includes multiple source driver chips, and each source driver chip is connected to some of the multiple source lines. Determining a target source signal for charge sharing from among multiple columns of source signals of the display signal in the n-th row based on the first display gray level, the second display gray level, and the signal polarities corresponding to the first sub-pixel and the second sub-pixel respectively includes: Dividing the display signal in the n-th row into sub-display signals corresponding to each source driver chip; Based on the first display gray level of the first sub-pixel, the second display gray level of the second sub-pixel, and the signal polarity in the sub-display signals, determining the target source signal from the sub-display signals.

13. The driving method according to claim 12, characterized in that, Determining the target source signal from the sub-display signals based on the first display gray level of the first sub-pixel, the second display gray level of the second sub-pixel, and the signal polarity in the sub-display signals includes: Continuing to divide the sub-display signals to obtain multiple target sub-display signals; Based on the first display gray level of the first sub-pixel, the second display gray level of the second sub-pixel, and the signal polarity in the target sub-display signals, determining the target source signal from the target sub-display signals.

14. A display device, characterized in that, Including a liquid crystal display panel, a source driver chip, and a timing control chip, where the liquid crystal display panel includes multiple source lines and multiple gate lines, and the multiple source lines and the multiple gate lines define a plurality of sub-pixels arranged in an array. Among them, the source driver chip is configured to output source signals to the multiple source lines, and the timing control chip is connected to the source driver chip; The timing control chip is configured to obtain a first display gray level of a plurality of first sub-pixels in the nth row and a second display gray level of a plurality of second sub-pixels in the (n + 1)th row based on the nth row display signal to be driven; and determine a target source signal for charge sharing among multiple column source signals of the nth row display signal based on the first display gray level, the second display gray level, and the signal polarities corresponding to the first sub-pixels and the second sub-pixels respectively; where n is a positive integer greater than or equal to 1. The source driver chip is configured to control charge sharing among the target source signals during a driving period of the nth row display signal.

15. The display device according to claim 14, characterized in that, It includes a plurality of the source driver chips, each of the source driver chips is connected to a part of the source lines among the multiple source lines, and the timing control chip is respectively connected to the plurality of source driver chips. Among them, the timing control chip is specifically configured to divide the nth row display signal into sub-display signals corresponding to each source driver chip; and determine the target source signal from the sub-display signals based on the first display gray level of the first sub-pixels, the second display gray level of the second sub-pixels, and the signal polarity in the sub-display signals.

16. The display device according to claim 14, characterized in that, The timing control chip is further configured to determine current performance parameters of the timing control chip; divide multiple column source signals based on the performance parameters to obtain a plurality of third signal groups; and for each of the third signal groups, determine the target source signal in the third signal group based on the first display gray level of the first sub-pixels, the second display gray level of the second sub-pixels, and the signal polarity in the third signal group.

17. The liquid crystal display device according to claim 14, characterized in that, A switching element is connected between two adjacent source lines among the multiple source lines, where The timing control chip is specifically configured to determine the switching state of each switching element based on the target source signal and send the switching state to the source driver chip. The source driver chip is specifically configured to control the switching elements according to the switching states of the multiple switching elements to enable charge sharing among the multiple target source signals.

18. A computer-readable storage medium, characterized in that, The computer program stored therein causes a processor to execute the driving method of the liquid crystal display panel according to any one of claims 1 - 13.

19. A timing control chip, located in a liquid crystal display panel, characterized in that, The timing control chip is used to execute the driving method of the liquid crystal display panel according to any one of claims 1 - 13.

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