Power supply voltage adjustment method and device for display devices and display devices.

Abstract

This application discloses a power supply voltage adjustment method, apparatus, and display device for a display device. The power supply voltage adjustment method includes: acquiring the mapping relationship between grayscale and data voltage of the display panel; acquiring the data voltage corresponding to the display grayscale of each sub-pixel in the current frame based on the grayscale and data voltage mapping relationship; acquiring the total number of signal flips in the current frame based on the data voltage corresponding to each sub-pixel connected to each data line; and adjusting the power supply voltage of the display panel if the total number of signal flips is greater than a preset threshold. This application uses the detection of data voltage flips as the basis for calculating the total number of signal flips, which can more accurately determine the total number of signal flips in the image, thereby more accurately defining the effective timing of the power supply voltage adjustment and making the power supply voltage adjustment more reliable.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a power supply voltage adjustment method, apparatus, and display device for a display device. Background Technology

[0002] With the strong advocacy for environmental protection and energy conservation, green energy saving has become a current trend in technological development. In the field of LCD (Liquid Crystal Display), the power supply voltage (AVDD voltage) of the display device can be dynamically adjusted by using an adaptive power supply voltage dynamic adjustment algorithm (Adaptive-AVDD algorithm, or A-AVDD algorithm for short), which can effectively reduce the energy consumption of the display device.

[0003] The A-AVDD algorithm determines whether to initiate power supply voltage adjustment by detecting signal flips on all data lines in the current frame. Signal flips are typically represented by grayscale flips of adjacent sub-pixels. However, since signal flips are essentially voltage flips, using grayscale flips as the basis for signal flip calculations does not directly reflect the load conditions of the current frame, potentially leading to inappropriate timing of A-AVDD algorithm activation and increased power consumption of the display panel. Summary of the Invention

[0004] Embodiments of this application provide a power supply voltage adjustment method, apparatus, and display device for a display device, in order to optimize the startup timing of the A-AVDD algorithm.

[0005] To address the aforementioned technical problems, embodiments of this application disclose the following technical solutions:

[0006] In a first aspect, a method for adjusting the power supply voltage of a display device is provided, the display device including a display panel, the display panel including a plurality of data lines, each of the data lines being connected to a plurality of sub-pixels, the method comprising:

[0007] Obtain the mapping relationship between the grayscale of the display panel and the data voltage, wherein the data voltage is the voltage input to the data line and drives the sub-pixel to display the brightness corresponding to the grayscale;

[0008] Based on the mapping relationship between grayscale and data voltage, the data voltage corresponding to the display grayscale of each sub-pixel in the current frame is obtained;

[0009] Based on the data voltage corresponding to each sub-pixel connected to each of the data lines, the total number of signal flips in the current frame is obtained.

[0010] If the total number of signal flips exceeds a preset threshold, the power supply voltage of the display panel is adjusted.

[0011] In conjunction with the first aspect, the display device further includes a mapping register, which is configured to pre-store the mapping relationship;

[0012] Obtaining the mapping relationship between the grayscale of the display panel and the data voltage includes:

[0013] Detect whether there is a mapping relationship between the grayscale of the display panel and the data voltage in the mapping relationship register;

[0014] If the mapping relationship exists in the mapping relationship register, then the mapping relationship is obtained from the mapping relationship register.

[0015] In conjunction with the first aspect, the display device further includes a power management integrated circuit, the power management integrated circuit being connected to the display panel; the method further includes:

[0016] If the mapping relationship does not exist in the mapping relationship register, the gamma voltage corresponding to each binding point grayscale is read from the power management integrated circuit;

[0017] Based on the gamma voltage corresponding to each of the binding points, the gray level voltage corresponding to the full gray level is obtained by linear interpolation.

[0018] The grayscale voltage corresponding to the full grayscale is determined as the mapping relationship between the grayscale and data voltage of the display panel;

[0019] The mapping relationship is stored in the mapping relationship register.

[0020] In conjunction with the first aspect, based on the data voltage corresponding to each of the sub-pixels connected to each of the data lines, the total number of signal flips in the current frame is obtained, including:

[0021] Based on each of the data lines, obtain the voltage difference between the data voltages of any two adjacent sub-pixels on the data lines;

[0022] The sum of the absolute values ​​of the voltage differences on all data lines is determined as the total number of signal flips in the current frame.

[0023] In conjunction with the first aspect, the sum of the absolute values ​​of the voltage differences on all data lines is determined as the total number of signal flips in the current frame, including:

[0024] The total number of signal flips in the current frame is determined by the following formula:

[0025]

[0026] Where Toggle is the total number of signal flips in the current frame, line_1 is the first data line, line_w is the wth data line, w is the number of data lines, and w is a positive integer; i is an integer greater than or equal to 2 and less than or equal to h, h is the number of sub-pixels connected to each data line, and h is a positive integer; V(g i V(g) represents the data voltage corresponding to the i-th sub-pixel. i-1 ) represents the data voltage corresponding to the (i-1)th sub-pixel.

[0027] In conjunction with the first aspect, adjusting the power supply voltage of the display panel includes:

[0028] Obtain the initial power supply voltage of the display panel;

[0029] Within the duration of the vertical time-series blank area of ​​each frame, the power supply voltage corresponding to the current frame is obtained based on the initial power supply voltage, the preset target power supply voltage, and the position of the current frame.

[0030] Adjust the power supply voltage of the display panel to the power supply voltage corresponding to the current frame.

[0031] In a second aspect, a power supply voltage adjustment device for a display device is provided, the display device including a display panel, the display panel including a plurality of data lines, each of the data lines connecting to a plurality of sub-pixels, the device comprising:

[0032] The mapping relationship acquisition module is used to acquire the mapping relationship between the grayscale of the display panel and the data voltage, wherein the data voltage is the voltage that is input to the data line and drives the sub-pixel to display the brightness corresponding to the grayscale;

[0033] The data voltage mapping module is used to obtain the data voltage corresponding to the display grayscale of each sub-pixel in the current frame based on the mapping relationship between the grayscale and the data voltage.

[0034] The signal flip calculation module is used to obtain the total number of signal flips in the current frame based on the data voltage corresponding to each sub-pixel connected to each data line.

[0035] The power supply voltage adjustment module is used to adjust the power supply voltage of the display panel if the total number of signal flips is greater than a preset threshold.

[0036] In conjunction with the second aspect, the display device further includes a mapping register, which is configured to pre-store the mapping relationship;

[0037] The mapping relationship acquisition module is used for:

[0038] Detect whether there is a mapping relationship between the grayscale of the display panel and the data voltage in the mapping relationship register;

[0039] If the mapping relationship exists in the mapping relationship register, then the mapping relationship is obtained from the mapping relationship register.

[0040] In conjunction with the second aspect, the display device further includes a power management integrated circuit, which is connected to the display panel; the mapping relationship acquisition module is also used for:

[0041] If the mapping relationship does not exist in the mapping relationship register, the gamma voltage corresponding to each binding point grayscale is read from the power management integrated circuit;

[0042] Based on the gamma voltage corresponding to each of the binding points, the gray level voltage corresponding to the full gray level is obtained by linear interpolation.

[0043] The grayscale voltage corresponding to the full grayscale is determined as the mapping relationship between the grayscale and data voltage of the display panel;

[0044] The mapping relationship is stored in the mapping relationship register.

[0045] Thirdly, a display device is provided, wherein the display device employs a power supply voltage adjustment method for a display device as described in any one of the first aspects, or a power supply voltage adjustment device for a display device as described in any one of the second aspects.

[0046] One of the above technical solutions has the following advantages or beneficial effects:

[0047] Compared with existing technologies, this application provides a power supply voltage adjustment method for a display device, comprising: acquiring the mapping relationship between grayscale and data voltage of the display panel; acquiring the data voltage corresponding to the display grayscale of each sub-pixel in the current frame based on the mapping relationship between grayscale and data voltage; acquiring the total number of signal flips in the current frame based on the data voltage corresponding to each sub-pixel connected on each data line; and adjusting the power supply voltage of the display panel if the total number of signal flips is greater than a preset threshold. The power supply voltage adjustment method provided in this application uses the detection of data voltage flips as the basis for calculating the total number of signal flips, which can more accurately determine the total number of signal flips in the image, thereby more accurately defining the effective timing of power supply voltage adjustment and making power supply voltage adjustment more reliable. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 This is a schematic diagram illustrating the grayscale of each sub-pixel connected to any two data lines in a display device.

[0050] Figure 2 This is an example diagram illustrating how the traditional A-AVDD algorithm detects signal flipping in an image.

[0051] Figure 3 This is a schematic diagram of the structure of a display device provided in an embodiment of this application;

[0052] Figure 4 This is a schematic diagram of the overall process of the power supply voltage adjustment method for the display device according to an embodiment of this application;

[0053] Figure 5 This is a schematic diagram of the power supply voltage adjustment device of the display device according to an embodiment of this application.

[0054] Figure label:

[0055] 10-Display panel; 11-Data line; 12-Sub-pixel; 20-Power management integrated circuit; 30-Timing controller; 31-Target IP module; 40-Mapping relationship register; 501-Mapping relationship acquisition module; 502-Data voltage mapping module; 503-Signal flip calculation module; 504-Power voltage adjustment module. Detailed Implementation

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

[0057] In this application, the A-AVDD algorithm represents a power supply voltage regulation algorithm.

[0058] Please refer to the following: Figure 1 and Figure 2 , Figure 1 This illustration shows an example of the grayscale of each sub-pixel connected to any two data lines in a display device. Figure 2 This illustrates an example of how the traditional A-AVDD algorithm detects signal flipping in an image. The traditional A-AVDD algorithm uses the grayscale flipping of adjacent sub-pixels to characterize signal flipping in the image. Figure 1 The two data lines shown are data line1 and data line2, each connecting 5 sub-pixels. The grayscale of each sub-pixel on data line1 is set with intervals of 170 and 0, and the grayscale of each sub-pixel on data line2 is set with intervals of 220 and 50. For example, the signal flip count on data line1 is 680, and the signal flip count on data line2 is also 680. At this time, the A-AVDD algorithm considers the signal flip counts to be the same. However, in reality, the actual data voltage flip count from 0 to 170 on data line1 is less than the actual data voltage flip count from 50 to 220 on data line2. Therefore, the change in data voltage is not the same as the change in grayscale value. Using the change in grayscale value as the basis for calculating the signal flip count cannot intuitively reflect the light and heavy load situation of the current frame, which may cause the A-AVDD algorithm to start at an inappropriate time and increase the power consumption of the display panel.

[0059] To address the problems existing in the traditional A-AVDD algorithm, this application provides a power supply voltage adjustment method for a display device. By detecting data voltage flips as the basis for calculating the total number of signal flips, the method can more accurately determine the total number of signal flips in the image, and thus more accurately define the effective timing of power supply voltage adjustment, thereby solving at least some of the aforementioned technical problems.

[0060] Please see Figure 3 , Figure 3 This illustration shows the structure of a display device provided in an embodiment of this application. The display device includes a display panel 10, which includes multiple data lines 11, each data line 11 connecting to multiple sub-pixels 12. The display device also includes a power management integrated circuit (PMIC) 20 and a timing controller (TCON) 30. Both the PMIC 20 and the timing controller 30 are connected to the display panel 10, and the timing controller 30 is also connected to the PMIC 20. The timing controller 30 contains multiple functional IP (Intellectual Property) modules. Among these functional IP modules, the functional IP module corresponding to the A-AVDD algorithm is the target IP module 31. The power supply voltage adjustment method for the display device provided in this embodiment is applied to the timing controller 30.

[0061] In some embodiments, the display device further includes a mapping register 40, which is configured to pre-store mappings.

[0062] Please see Figure 4 , Figure 4 This illustration shows the overall flow of a power supply voltage adjustment method for a display device according to an embodiment of this application. The power supply voltage adjustment method for the display device includes the following steps:

[0063] 401: Obtain the mapping relationship between grayscale and data voltage of display panel 10.

[0064] Specifically, the data voltage is the voltage of the input data line 11 that drives the sub-pixel 12 to display the brightness corresponding to the grayscale. The mapping relationship between grayscale and data voltage is called the grayscale voltage lookup table (LUT). The data voltage corresponding to a grayscale can be found from the grayscale voltage lookup table. This lookup table can be stored in the mapping relationship register 40.

[0065] In some embodiments, step 401 may be performed by the following steps:

[0066] Step 1: Check whether there is a mapping relationship between the grayscale of the display panel 10 and the data voltage in the mapping relationship register 40.

[0067] Step 2: If a mapping relationship exists in the mapping relationship register 40, then obtain the mapping relationship from the mapping relationship register 40.

[0068] In this way, grayscale can be easily converted into data voltage and the total number of subsequent signal flips can be calculated, thus improving processing efficiency.

[0069] Furthermore, in some embodiments, after performing step one, step 401 may also include the following steps:

[0070] Step 3: If there is no mapping relationship in the mapping relationship register 40, then read the gamma voltage corresponding to each binding point grayscale from the power management integrated circuit 20.

[0071] Specifically, when adjusting the gamma characteristic curve of the display panel 10, a grayscale binding method is typically used for debugging. The gamma voltage corresponding to each grayscale binding point is stored in the power management integrated circuit 20. At this time, the timing controller 30 can read the gamma voltage corresponding to each grayscale binding point from the power management integrated circuit 20.

[0072] Step 4: Based on the gamma voltage corresponding to each binding point gray level, obtain the gray level voltage corresponding to the entire gray level using linear interpolation.

[0073] Specifically, full grayscale refers to all grayscale levels within the entire grayscale range, such as all grayscale levels from grayscale 0 to grayscale 255.

[0074] Step 5: Determine the grayscale voltage corresponding to the full grayscale as the mapping relationship between the grayscale and data voltage of the display panel 10.

[0075] Step 6: Store the mapping relationship in mapping relationship register 40.

[0076] Thus, by means of the above method, when there is no mapping relationship in the mapping relationship register 40, the mapping relationship register 40 is initialized based on the gray level of the bound point and the corresponding gamma voltage to obtain the gray level voltage corresponding to the full gray level, and this is used as the mapping relationship between gray level and data voltage. This is not only more convenient, but also ensures that the mapping relationship is consistent with the display panel 10, thereby improving the accuracy of subsequent calculations.

[0077] 402: Based on the mapping relationship between grayscale and data voltage, obtain the data voltage corresponding to the display grayscale of each sub-pixel 12 in the current frame.

[0078] Specifically, based on the display grayscale of each sub-pixel 12, the data voltage corresponding to each display grayscale is found from the mapping relationship.

[0079] 403: Based on the data voltage corresponding to each sub-pixel 12 connected on each data line 11, obtain the total number of signal flips in the current frame.

[0080] In some embodiments, the total number of signal flips in the current frame can be obtained in the following way:

[0081] Step 1: Based on each data line 11, obtain the voltage difference between the data voltages of any two adjacent sub-pixels 12 on the data line 11.

[0082] Step 2: The sum of the absolute values ​​of the voltage differences on all data lines 11 is used to determine the total number of signal flips in the current frame.

[0083] In some examples, the total number of signal flips in the current frame can be determined using the following formula (1):

[0084]

[0085] In formula (1), Toggle represents the total number of signal flips in the current frame. The larger the Toggle, the greater the load on data line 11 and the higher the power consumption. line_1 is the first data line 11, line_w is the wth data line 11, w is the number of data lines 11, w is a positive integer, i is an integer greater than or equal to 2 and less than or equal to h, h is the number of sub-pixels 12 connected to each data line 11, h is a positive integer, V(g i ) represents the data voltage corresponding to the i-th sub-pixel 12, V(g) i-1 ) represents the data voltage corresponding to the (i-1)th sub-pixel 12.

[0086] 404: If the total number of signal flips is greater than the preset threshold, the power supply voltage of the display panel 10 will be adjusted.

[0087] In some embodiments, if the total number of signal flips exceeds a preset threshold, the timing controller 30 determines that the current screen is a reloaded screen and the power supply voltage AVDD needs to be adjusted. Specifically, the power supply voltage of the display panel 10 can be adjusted through the following steps:

[0088] Step 1: Obtain the initial power supply voltage of the display panel 10.

[0089] Specifically, the timing controller 30 reads the initial power supply voltage of the display panel 10 from the power management integrated circuit 20 and writes the initial power supply voltage into the target IP module 31.

[0090] Step 2: Within the duration of the vertical time-series blank area of ​​each frame, obtain the power supply voltage corresponding to the current frame based on the initial power supply voltage, the pre-set target power supply voltage, and the position of the current frame.

[0091] Specifically, the duration of the vertical time blanking area in each frame is the V-Blanking area in each frame. For example, for a resolution of 1920 (horizontal h direction) × 1080 (vertical v direction), but in reality, 1150 lines of data may be sent in the v direction, then the V-Blanking area is 1150 - 1080 = 70 lines.

[0092] After the timing controller 30 writes the initial power supply voltage into the target IP module 31, the target IP module 31 can obtain the power supply voltage corresponding to the current frame within the duration of the vertical timing blank area of ​​each frame, based on the initial power supply voltage, the pre-set target power supply voltage, and the position of the current frame. Specifically, it can be calculated using inter-frame interpolation methods in related technologies. For example, based on the difference between the initial power supply voltage and the target power supply voltage, and the number of frames between the initial frame and the target frame, the voltage interval value for each frame can be obtained. Then, the frame difference between the current frame and the initial frame is multiplied by the voltage interval value and added to the initial power supply voltage to obtain the power supply voltage corresponding to the current frame. The specific details are not elaborated here.

[0093] Step 3: Adjust the power supply voltage of the display panel 10 to the power supply voltage corresponding to the current frame.

[0094] Specifically, the timing controller 30 writes the power supply voltage corresponding to the current frame calculated by the target IP module 31 into the power management integrated circuit 20, so that the power management integrated circuit 20 provides the power supply voltage corresponding to the current frame to the display panel 10.

[0095] In addition, in some embodiments, the power supply voltage adjustment method for the display device may further include the following steps in parallel with step 401:

[0096] Step 1: Obtain the grayscale of each sub-pixel 12 in the current frame of the display panel 10.

[0097] Step 2: Based on the grayscale of each sub-pixel 12, obtain the proportion of high grayscale.

[0098] Specifically, the proportion of high gray levels is determined by the quotient of the number of high gray levels in each sub-pixel 12 and the total number of sub-pixels 12.

[0099] Step 3: If the proportion of high grayscale exceeds the preset grayscale threshold, the power supply voltage of the display panel 10 is adjusted.

[0100] It is understood that the power supply voltage adjustment method provided in this application uses the detection of data voltage flips as the basis for calculating the total number of signal flips, which can more accurately determine the total number of signal flips in the image, thereby more accurately defining the effective timing of power supply voltage adjustment and making power supply voltage adjustment more reliable.

[0101] Accordingly, please refer to Figure 5 , Figure 5 This diagram illustrates the structure of a power supply voltage adjustment device for a display device according to an embodiment of this application. The display device provided in this embodiment includes a display panel 10, which includes multiple data lines 11, each data line 11 connecting to multiple sub-pixels 12. The power supply voltage adjustment device includes: a mapping relationship acquisition module 501, a data voltage mapping module 502, a signal inversion calculation module 503, and a power supply voltage adjustment module 504.

[0102] The mapping relationship acquisition module 501 is used to acquire the mapping relationship between the grayscale of the display panel 10 and the data voltage, where the data voltage is the voltage of the input data line 11 that drives the sub-pixel 12 to display the brightness corresponding to the grayscale.

[0103] The data voltage mapping module 502 is used to obtain the data voltage corresponding to the display grayscale of each sub-pixel in the current frame based on the mapping relationship between grayscale and data voltage.

[0104] The signal flip calculation module 503 is used to obtain the total number of signal flips in the current frame based on the data voltage corresponding to each sub-pixel 12 connected on each data line 11.

[0105] The power supply voltage adjustment module 504 is used to adjust the power supply voltage of the display panel 10 if the total number of signal flips is greater than a preset threshold.

[0106] In some embodiments, the display device further includes a mapping register 40, which is configured to pre-store mappings.

[0107] The mapping relationship acquisition module 501 is used for:

[0108] Check whether there is a mapping relationship between the grayscale of the display panel 10 and the data voltage in the mapping relationship register 40.

[0109] If a mapping relationship exists in the mapping relationship register 40, then the mapping relationship is obtained from the mapping relationship register 40.

[0110] In some embodiments, the display device further includes a power management integrated circuit 20, which is connected to the display panel 10. The mapping relationship acquisition module 501 is also used for:

[0111] If there is no mapping relationship in the mapping relationship register 40, the gamma voltage corresponding to each binding point grayscale is read from the power management integrated circuit 20.

[0112] Based on the gamma voltage corresponding to each binding point gray level, the gray level voltage corresponding to the entire gray level is obtained by linear interpolation.

[0113] The grayscale voltage corresponding to the full grayscale is determined as the mapping relationship between the grayscale and data voltage of the display panel 10.

[0114] The mapping relationship is stored in the mapping relationship register 40.

[0115] In some embodiments, the signal inversion calculation module 503 is specifically used for:

[0116] Based on each data line 11, obtain the voltage difference between the data voltages of any two adjacent sub-pixels 12 on the data line 11.

[0117] The sum of the absolute values ​​of the voltage differences on all data lines 11 is used to determine the total number of signal flips in the current frame.

[0118] In some embodiments, the signal inversion calculation module 503 is specifically used for:

[0119] The total number of signal flips in the current frame is determined by the following formula:

[0120]

[0121] Where Toggle is the total number of signal flips in the current frame, line_1 is the first data line 11, line_w is the wth data line 11, w is the number of data lines 11, w is a positive integer, i is an integer greater than or equal to 2 and less than or equal to h, h is the number of sub-pixels 12 connected to each data line 11, h is a positive integer, V(g i ) represents the data voltage corresponding to the i-th sub-pixel 12, V(g) i-1 ) represents the data voltage corresponding to the (i-1)th sub-pixel 12.

[0122] In some embodiments, the power supply voltage adjustment module 504 is specifically used for:

[0123] Obtain the initial power supply voltage of the display panel 10.

[0124] Within the duration of the vertical time-series blank area of ​​each frame, the power supply voltage corresponding to the current frame is obtained based on the initial power supply voltage, the pre-set target power supply voltage, and the position of the current frame.

[0125] The power supply voltage of the display panel 10 will be adjusted to the power supply voltage corresponding to the current frame.

[0126] It is understood that the power supply voltage adjustment device provided in this application uses the detection of data voltage flips as the basis for calculating the total number of signal flips, which can more accurately determine the total number of signal flips in the image, thereby more accurately defining the effective timing of power supply voltage adjustment and making power supply voltage adjustment more reliable.

[0127] Accordingly, this application also provides a display device that employs the power supply voltage adjustment method or the power supply voltage adjustment device described in the foregoing embodiments. The display device may be a terminal, which may specifically include, but is not limited to, a video wall, smart TV, smartphone, tablet computer, laptop computer, or desktop computer.

[0128] The power supply voltage adjustment method, apparatus, and display device of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A power supply voltage adjustment method of a display device, characterized by, The display device comprises a display panel, the display panel comprises a plurality of data lines, each data line is connected to a plurality of sub-pixels, and the method comprises: obtaining a mapping relationship between gray scales and data voltages of the display panel, the data voltage being a voltage input to the data line and driving the sub-pixel to display a luminance corresponding to the gray scale; based on the mapping relationship between the gray scales and the data voltages, obtaining the data voltage corresponding to the display gray scale of each sub-pixel in the current frame; based on each data line, obtaining the voltage difference value of the data voltage corresponding to any two adjacent sub-pixels on the data line, and determining the sum of the absolute values of each voltage difference value on all data lines as the total number of signal flips of the current frame to obtain the total number of signal flips of the current frame; if the total number of signal flips is greater than a preset threshold, adjusting the power supply voltage of the display panel.

2. The power voltage adjusting method of a display device according to claim 1, wherein The display device further comprises a mapping relationship register configured to pre-store the mapping relationship; obtaining a mapping relationship between gray scales and data voltages of the display panel, comprises: detecting whether the mapping relationship between the gray scales and the data voltages of the display panel exists in the mapping relationship register; if the mapping relationship exists in the mapping relationship register, obtaining the mapping relationship from the mapping relationship register.

3. The power voltage adjustment method of a display device according to claim 2, wherein The display device further comprises a power management integrated circuit connected with the display panel; the method further comprises: if the mapping relationship does not exist in the mapping relationship register, reading the gamma voltage corresponding to each binding point gray scale from the power management integrated circuit; based on the gamma voltage corresponding to each binding point gray scale, obtaining the gray scale voltage corresponding to the full gray scale in a linear interpolation manner; determining the gray scale voltage corresponding to the full gray scale as the mapping relationship between the gray scales and the data voltages of the display panel; storing the mapping relationship in the mapping relationship register.

4. The power voltage adjusting method of a display device according to claim 1, wherein determining the sum of the absolute values of each voltage difference value on all data lines as the total number of signal flips of the current frame, comprises: determining the total number of signal flips of the current frame by the following formula: Wherein, Toggle is the total number of signal flips of the current frame, line_1 is the first data line, line_w is the wth data line, w is the number of data lines, w is a positive integer; i is an integer greater than or equal to 2 and less than or equal to h, h is the number of sub-pixels connected on each data line, h is a positive integer; V(g i ) is the data voltage corresponding to the ith sub-pixel, V(g i-1 ) is the data voltage corresponding to the i-1th sub-pixel.

5. The power voltage adjusting method of a display device according to claim 1, wherein adjusting the power supply voltage of the display panel, comprises: obtaining an initial power supply voltage of the display panel; based on the initial power supply voltage, a pre-set target power supply voltage and the position of the current frame, obtaining the power supply voltage corresponding to the current frame within the time length of each frame vertical timing blanking area; adjusting the power supply voltage of the display panel to the power supply voltage corresponding to the current frame.

6. A power supply voltage adjustment apparatus of a display device, characterized by comprising: The display device comprises a display panel, the display panel comprises a plurality of data lines, each data line is connected to a plurality of sub-pixels, and the method comprises: a mapping relationship obtaining module for obtaining a mapping relationship between gray scales and data voltages of the display panel, the data voltage being a voltage input to the data line and driving the sub-pixel to display a luminance corresponding to the gray scale; a data voltage mapping module for obtaining the data voltage corresponding to the display gray scale of each sub-pixel in the current frame based on the mapping relationship between the gray scales and the data voltages. The signal flip calculation module is configured to, based on each data line, obtain a voltage difference value of data voltages corresponding to any two adjacent sub-pixels on the data line, and determine a sum of absolute values of each voltage difference value on all data lines as a total number of signal flips of the current frame, so as to obtain the total number of signal flips of the current frame. The power voltage adjustment module is configured to, if the total number of signal flips is greater than a preset threshold, adjust a power voltage of the display panel.

7. The power voltage adjusting apparatus of a display device according to claim 6, wherein The display device further comprises a mapping relationship register configured to pre-store the mapping relationship. The mapping relationship acquisition module is configured to: detect whether the mapping relationship between the gray scale and the data voltage of the display panel exists in the mapping relationship register; and if the mapping relationship exists in the mapping relationship register, acquire the mapping relationship from the mapping relationship register.

8. The power voltage adjusting apparatus of a display device according to claim 7, wherein The display device further comprises a power management integrated circuit connected with the display panel; and the mapping relationship acquisition module is further configured to: if the mapping relationship does not exist in the mapping relationship register, read a gamma voltage corresponding to each binding point gray scale from the power management integrated circuit; based on the gamma voltage corresponding to each binding point gray scale, acquire a gray scale voltage corresponding to a full gray scale in a linear interpolation manner; and determine the gray scale voltage corresponding to the full gray scale as the mapping relationship between the gray scale and the data voltage of the display panel. The display device further comprises a mapping relationship register configured to pre-store the mapping relationship.

9. A display device, characterized by The display device adopts the power voltage adjustment method of the display device according to any one of claims 1 to 5, or the power voltage adjustment apparatus of the display device according to any one of claims 6 to 8.

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