Display control system, display device, and display control method

Abstract

The invention discloses a display control system, a display device and a display control method. The display control system is applied to the display device and comprises a refresh control module and a power management module. The refresh control module is configured to control the display device to display a first picture according to a first refresh rate; in response to the fact that the current picture is the static picture, the display device is controlled to display a second picture according to a second refresh rate, and the second refresh rate is smaller than the first refresh rate. The power management module is configured to control a power management chip of the display device to stop supplying power to a source driving chip of the display device during the blanking period of the second picture. The refresh rate of the display device is reduced under the static picture, power supply to the source driving chip is stopped synchronously during the blanking period of the picture, and the display effect and power consumption of the display device are balanced.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display control system, a display device, and a display control method. Background Art

[0002] With the development of display technology, the refresh rate of display devices is getting higher and higher. High refresh rate can bring users a smooth and coherent visual experience. However, while high refresh rate improves the visual experience, it also leads to an increase in the power consumption of the display device. How to balance the display effect and power consumption of the display device is a topic that the industry has been committed to studying. Summary of the invention

[0003] The embodiments of the present application provide a display control system, a display device, and a display control method, which reduce the refresh rate of the display device under static images and simultaneously stop supplying power to the source driver chip during the blanking period of the image, thereby balancing the display effect and power consumption of the display device.

[0004] In a first aspect, an embodiment of the present application provides a display control system, which is applied to a display device, and the display control system includes:

[0005] A refresh control module is configured to: control the display device to display a first picture at a first refresh rate; and, in response to the current picture being a static picture, control the display device to display a second picture at a second refresh rate; wherein the second refresh rate is less than the first refresh rate;

[0006] The power management module is configured to: during the blanking period of the second picture, control the power management chip of the display device to stop supplying power to the source driving chip of the display device.

[0007] In a second aspect, an embodiment of the present application provides a display device, comprising: a source driver chip, a power management chip, and the display control system described in the first aspect.

[0008] In a third aspect, an embodiment of the present application provides a display control method, the method comprising:

[0009] Controlling the display device to display the first picture at a first refresh rate;

[0010] In response to the current picture being a static picture, controlling the display device to display a second picture at a second refresh rate; wherein the second refresh rate is less than the first refresh rate; and

[0011] During the blanking period of the second picture, the power management chip of the display device is controlled to stop supplying power to the source driving chip of the display device.

[0012] In summary, the technical solution provided by the embodiment of the present application is that in response to the current picture being a static picture, the refresh rate of the display device is reduced from the first refresh rate to the second refresh rate; and for the picture displayed after the refresh rate is reduced, during the blanking period of the picture, the source driver chip is stopped from being powered. Since the number of picture frames that need to be updated by the display device per unit time is reduced after the refresh rate is reduced, the blanking period of each frame of the picture displayed after the refresh rate is reduced will be extended. At this time, stopping the power supply to the source driver chip during the blanking period can achieve the purpose of reducing power consumption during a longer blanking period, thereby improving the power consumption reduction effect. Moreover, in a static picture, the picture content does not change or changes slightly, and the embodiment of the present application reduces the refresh rate for the static picture without affecting the display effect. Therefore, the embodiment of the present application reduces the refresh rate of the display device under a static picture, and simultaneously stops powering the source driver chip during the blanking period of the picture, balancing the display effect and power consumption of the display device, while avoiding affecting the display effect and improving the power consumption reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of a display control system provided in an embodiment of the present application;

[0014] Figure 2 is a schematic diagram of a frequency reduction process provided by an embodiment of the present application;

[0015] Figure 3 is a schematic diagram of another frequency reduction process provided in an embodiment of the present application;

[0016] Figure 4 is a schematic diagram of a display device provided in an embodiment of the present application;

[0017] Figure 5 is a flow chart of a display control method provided by an embodiment of the present application;

[0018] Figure 6 is a flow chart of another display control method provided by an embodiment of the present application; DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. The described technical solutions are only used to explain and illustrate the ideas of the present application and should not be regarded as limiting the scope of protection of the present application.

[0020] In addition, the "plurality" in the embodiments of the present application refers to two or more. The "first" and "second" in the embodiments of the present application are used to distinguish different technical features, and do not indicate any order, quantity or importance.

[0021] The various embodiments provided in this application are similar, and features in different embodiments may be combined with each other.

[0022] The order of description of the following embodiments is not intended to limit the preferred order of the embodiments.

[0023] See also Figure 1 , Figure 1 is a schematic diagram of a display control system provided by an embodiment of the present application. The display control system can be applied to a display device. Figure 1 As shown, the display control system 100 includes: a refresh control module 110 and a power management module 120. The refresh control module 110 is connected to the power management module 120.

[0024] The refresh control module 110 is configured to: control the display device to display the first picture at a first refresh rate; and, in response to the current picture being a static picture, control the display device to display the second picture at a second refresh rate, wherein the second refresh rate is lower than the first refresh rate.

[0025] The power management module 120 is configured to control a power management chip (PMIC) of the display device to stop supplying power to a source driver IC (source IC or driver IC) of the display device during a blanking period of the second frame.

[0026] In the embodiment of the present application, the refresh control module 110 may first control the display device to display the first picture at the first refresh rate. The first picture may be one frame or multiple frames. When the first picture is multiple frames, the multiple frames of the first pictures may be the same or different.

[0027] During the process of the display device displaying at least one frame of the first picture, the refresh control module 110 can determine whether to update the refresh rate of the display device according to the picture type of the current picture. Among them, the picture type can include static pictures and dynamic pictures; a static picture means that the content of the picture does not change, or changes but the change is small; a dynamic picture means that the content of the picture changes and the change is large. For the method of determining whether the current picture is a static picture, please refer to the following embodiment, which will not be elaborated here. The refresh control module 110 can detect whether the current picture is a static picture by itself, or obtain the detection results of other modules for the picture type of the current picture, which is not limited to the embodiments of the present application.

[0028] In response to the current picture being a static picture, the refresh control module 110 reduces the refresh rate of the display device from the first refresh rate to the second refresh rate, and controls the display device to display the second picture at the second refresh rate. The second picture can be one frame or multiple frames. In the case where the second picture is multiple frames, since the refresh control module 110 reduces the refresh rate of the display device in response to the current picture being a static picture, the multiple frames of the second picture are usually the same. Among them, the second refresh rate can be any refresh rate less than the first refresh rate, or there can be a specific relationship between the second refresh rate and the first refresh rate, for example, the second refresh rate is half, one third, or one quarter of the first refresh rate.

[0029] The refresh control module 110 can be connected to the power management module 120, and the power management module 120 can control whether the power management chip of the display device supplies power to the source driver chip of the display device. When the current picture is a static picture, the display device displays the second picture at the second refresh rate, and during the blanking period of the second picture, the power management module 120 controls the power management chip to stop supplying power to the source driver chip. The power management module 120 can turn off the power supply current between the power management chip and the source driver chip. Among them, the blanking period includes the vertical blanking interval (Vertical Blanking Interval, referred to as VBI) period. The vertical blanking period refers to the time interval during which the scanning point returns from the bottom vertex of the picture to the top vertex during the scanning process to prepare for the start of a new frame scan. In the embodiment of the present application, for each frame of the second picture displayed after the refresh rate is reduced, the source driver chip can be stopped from being supplied with power during the vertical blanking period of the second picture to reduce power consumption. Of course, the embodiment of the present application does not exclude the possibility that the blanking period includes the horizontal blanking (Horizontal Blanking, referred to as HBK) period. The horizontal blanking period refers to the time interval during the scanning process when the scanning point returns from the right edge of the image frame to the left edge to prepare for the start of a new line scan.

[0030] Since the second refresh rate is lower than the first refresh rate, the number of frames that the display device needs to update per unit time is reduced, so that the blanking period of each frame of the second picture displayed at the second refresh rate is extended relative to the blanking period of each frame of the first picture displayed at the first refresh rate. The embodiment of the present application stops supplying power to the source driver chip during the blanking period of the second picture to achieve the purpose of reducing power consumption during a longer blanking period, thereby improving the effect of reducing power consumption.

[0031] In addition, since the second refresh rate is lower than the first refresh rate, the number of picture frames that the display device needs to update per unit time is reduced, so that the number of frames of the second picture per unit time is less than the number of frames of the first picture. To ensure that the picture is displayed in real time, after switching from the first refresh rate to the second refresh rate, the input multi-frame picture can be framed to reduce the number of frames of the second picture that needs to be displayed. Based on this, in some embodiments, the refresh control module 110 is also configured to: in response to the current picture being a static picture, expand the blanking period according to the second refresh rate; and control the display device to display the second picture corresponding to the end time of the blanking period. Optionally, the picture between two frames of the second picture in the input multi-frame picture can be discarded or temporarily stored for picture compensation, etc.

[0032] For example, Figure 2 As shown in FIG. 1 , assuming that the data input is 180Hz, when the screen display is performed at 180Hz, each frame of the input screen will be displayed. Assuming that one of the frames is detected as a static screen, in response to the frame being a static screen, down-conversion processing is performed. Figure 2 As shown, 180Hz can be reduced to 48Hz, and the picture display after this frame is performed at 48Hz. When the picture display is performed at 48Hz, the blanking period of each frame displayed is extended, so it is necessary to perform frame extraction processing on the input multiple frames. Figure 2 As shown, the input picture corresponding to the end of the blanking period of each frame of the displayed picture can be selected to perform picture display.

[0033] In order to avoid screen tearing caused by a reduced refresh rate, screen compensation may be performed on the second screen to be displayed. Figure 1 As shown, the display control system 100 also includes a picture compensation module 130. Among them, the picture compensation module 130 is configured to: perform picture compensation on the second picture corresponding to the end moment of the blanking period; the refresh control module 110 is also configured to: control the display device to display the second picture after picture compensation. The embodiment of the present application does not limit the specific operation of picture compensation. Optionally, picture compensation can be performed by inserting pixels or generating intermediate frames. For example, after reducing the refresh rate, for the second picture corresponding to the end moment of the blanking period, a plurality of pixels can be inserted into the second picture for picture compensation. The number of inserted pixels can be, for example, the initial number of pixels in the second picture, and the grayscale value of the inserted pixels can be, for example, determined according to the picture removed from display during frame extraction; or, the second picture can be completely or partially replaced by an intermediate frame for picture compensation. The intermediate frame can be generated, for example, according to the picture removed from display during frame extraction.

[0034] In some embodiments, the refresh control module 110 is further configured to send a frequency indication signal to the power management module 120. When the current picture is a static picture, the frequency indication signal is a first value. The power management module 120 is further configured to send a power control signal to the power management chip during the blanking period of the second picture in response to the frequency indication signal being the first value, so as to control the power management chip to stop supplying power to the source driver chip.

[0035] In some embodiments, the refresh control module 110 is further configured to send a frequency indication signal to the picture compensation module 130. When the current picture is a static picture, the frequency indication signal is a first value. The picture compensation module 130 is further configured to perform picture compensation on the second picture corresponding to the end time of the blanking period in response to the frequency indication signal being the first value.

[0036] Among them, the frequency indication signal is used to indicate to the power management module 120 and the picture compensation module 130 whether the current picture is a static picture. When the current picture is a static picture, the refresh control module 110 can set the frequency indication signal to the first value, otherwise when the current picture is a dynamic picture, the refresh control module 110 can set the frequency indication signal to the second value. The first value is different from the second value. The embodiment of the present application does not limit the specific values ​​of the first value and the second value. For example, the first value can be 1 and the second value can be 0. In response to the frequency indication signal being the first value, the power management module 120 controls the power management chip to stop supplying power to the source driver chip during the blanking period; the picture compensation module 130 responds to the frequency indication signal being the first value and performs picture compensation on the second picture. By setting the frequency indication signal, the embodiment of the present application helps the power management module 120 to shut down the power supply of the source driver chip in time, and the picture compensation module 130 to start picture compensation in time.

[0037] For example, Figure 3 As shown, assuming that one of the frames is detected as a static frame, in response to the frame being a static frame, frequency reduction processing is performed, and the frequency indication signal VRR_flag is set to 1. In response to the frequency indication signal VRR_flag being 1, the picture compensation module 130 immediately starts picture compensation. In response to the frequency indication signal VRR_flag being 1, the power management module 120 starts to control the power management chip to stop supplying power to the source driver chip during the blanking period of each frame displayed.

[0038] In summary, the technical solution provided by the embodiment of the present application is that in response to the current picture being a static picture, the refresh rate of the display device is reduced from the first refresh rate to the second refresh rate; and for the picture displayed after the refresh rate is reduced, during the blanking period of the picture, the source driver chip is stopped from being powered. Since the number of picture frames that need to be updated by the display device per unit time is reduced after the refresh rate is reduced, the blanking period of each frame of the picture displayed after the refresh rate is reduced will be extended. At this time, stopping the power supply to the source driver chip during the blanking period can achieve the purpose of reducing power consumption during a longer blanking period, thereby improving the power consumption reduction effect. Moreover, in a static picture, the picture content does not change or changes slightly, and the embodiment of the present application reduces the refresh rate for the static picture without affecting the display effect. Therefore, the embodiment of the present application reduces the refresh rate of the display device under a static picture, and simultaneously stops powering the source driver chip during the blanking period of the picture, balancing the display effect and power consumption of the display device, while avoiding affecting the display effect and improving the power consumption reduction effect.

[0039] It should be understood that in the embodiments of the present application, for ease of description, the picture displayed at the first refresh rate is referred to as the first picture, and the picture displayed at the second refresh rate is referred to as the second picture, which does not constitute a limitation of the present application. Any first picture and any second picture can be the same picture or different pictures. In addition, in the embodiments of the present application, the two frames are the same, which can include that the two frames are exactly the same, or it can mean that the difference between the two frames is small.

[0040] In some embodiments, Figure 1 As shown, the display control system 100 may further include a picture detection module 140. The picture detection module 140 may be connected to the refresh control module 110. The picture detection module 140 is configured to: detect whether the current picture is the same as the previous picture according to the grayscale value of the current picture and the grayscale value of the previous picture of the current picture; and in response to the current picture being the same as the previous picture, detect whether the current picture is a static picture according to the number of consecutive frames of the current same picture.

[0041] The embodiment of the present application can determine whether the two frames are the same based on the grayscale values ​​of the current picture and the previous picture. When the current picture is the same as the previous picture, it can determine whether the current picture is a static picture based on the number of consecutive frames of the current same picture. Compared with the technical solution that the current picture is considered to be a static picture when the current picture is the same as the previous picture, the embodiment of the present application introduces the detection of the number of consecutive frames of the current same picture, improves the detection reliability of static pictures, and avoids frequent switching of refresh rates due to frequent identification as static pictures, thereby ensuring the display effect and stability of the display device.

[0042] The embodiments of the present application do not limit the specific detection method of whether the current picture is the same as the previous picture. For example, the number of pixels with the same grayscale value in the current picture and the previous picture can be used to determine whether the current picture is the same as the previous picture, and the current picture is determined to be the same as the previous picture when the number of pixels is greater than or equal to the number threshold. For another example, the statistical difference of the grayscale value in the current picture and the previous picture can be used to determine whether the current picture is the same as the previous picture, and the current picture is determined to be the same as the previous picture when the statistical difference is less than or equal to the difference threshold.

[0043] In some embodiments, the picture detection module 140 is further configured to: determine the cumulative grayscale difference of the current picture according to the grayscale value of the current picture and the grayscale value of the previous picture; and determine whether the current picture is the same as the previous picture according to the cumulative grayscale difference of the current picture and the first threshold. When the cumulative grayscale difference of the current picture is less than the first threshold, the current picture is the same as the previous picture; when the cumulative grayscale difference of the current picture is greater than the first threshold, the current picture is different from the previous picture; when the cumulative grayscale difference of the current picture is equal to the first threshold, the current picture can be considered to be the same or different from the previous picture. In practical applications, the first threshold can be flexibly set according to demand, and the embodiments of the present application are not limited to this.

[0044] Wherein, the accumulated grayscale difference can be determined according to the grayscale difference between the grayscale values ​​of the multiple pixels in the current picture and the grayscale values ​​of the corresponding pixels in the previous picture. Based on this, in some embodiments, the above-mentioned picture detection module 140 is also configured to: determine the grayscale difference corresponding to the first pixel according to the grayscale value of the first pixel in the current picture and the grayscale value of the second pixel in the previous picture; determine the accumulated grayscale difference of the current picture according to the grayscale difference corresponding to the multiple pixels in the current picture. Wherein, the display position of the first pixel in the current picture is the same as the display position of the second pixel in the previous picture. The embodiment of the present application can perform summation or weighted summation processing on the grayscale differences corresponding to the multiple pixels in the current picture to determine the accumulated grayscale difference of the current picture. The multiple pixels in the current picture can be all the pixels in the current picture, or can be part of the pixels in the current picture. For example, the accumulated grayscale difference of the current picture can be calculated according to the following formula 1.

[0045] Formula 1:

[0046] Where △Data refers to the accumulated grayscale difference of the current picture, w refers to the number of pixels in a row of the current picture, h refers to the number of pixels in a column of the current picture, and F m+1 (i, j) refers to the grayscale value of the pixel located in the i-th row and j-th column in the current image. m(i, j) refers to the grayscale value of the pixel located at the i-th row and j-th column in the previous picture of the current picture, and abs refers to absolute value calculation. It should be understood that since the current picture can be input row by row, when calculating the accumulated grayscale difference of the current picture, the grayscale difference corresponding to each pixel can be calculated row by row.

[0047] In some embodiments, the image detection module 140 is further configured to: determine the cumulative grayscale difference of the current image according to the grayscale value of the current image and the grayscale value of the previous image; determine the check value of the current image according to the cumulative grayscale difference of the current image; and determine whether the current image is the same as the previous image according to the check value of the current image and the check value of the previous image. When the check value of the current image is the same as the check value of the previous image, the current image is the same as the previous image; when the check value of the current image is different from the check value of the previous image, the current image is different from the previous image.

[0048] The specific determination method of the accumulated grayscale difference of the current picture can refer to the above embodiment, which will not be described in detail here. According to the accumulated grayscale difference of the current picture, the check value of the current picture can be further determined. The check value satisfies the check format, for example, the check format can be a bit format. Therefore, it is necessary to convert the accumulated grayscale difference into a check format to determine the check value. In some embodiments, the picture detection module 140 is also configured to: convert the accumulated grayscale difference of the current picture into a check format to obtain a reference value of the current picture; select the check value of the current picture from the reference value of the current picture. Among them, the check value is the value of the first component in the reference value. The embodiment of the present application can avoid the check value being too long by selecting the value of the first component in the reference value as the check value. In some embodiments, the check format is a bit format; the first component is a first bit combination. For example, the first component is the lowest 8 bits, so that the lowest 8 bits can be selected from the reference value as the check value. Taking the first component as the lowest 8 bits as an example, the accumulated grayscale difference is 500, the reference value is 111110100, and the check value is the lowest 8 bits in the reference value, so the check value is 11110100.

[0049] It should be understood that the embodiments of the present application can determine whether the current image is the same as the previous image only based on the cumulative grayscale difference, or can determine whether the current image is the same as the previous image only based on the check value, or can determine whether the current image is the same as the previous image in combination with the cumulative grayscale difference and the check value. Therefore, in some embodiments, the image detection module 140 is further configured to: determine the cumulative grayscale difference of the current image based on the grayscale value of the current image and the grayscale value of the previous image; determine the check value of the current image based on the cumulative grayscale difference of the current image; determine whether the current image is the same as the previous image based on a first comparison result of the cumulative grayscale difference of the current image and the first threshold, and a second comparison result of the check value of the current image and the check value of the previous image. Among them, when the first comparison result is that the cumulative grayscale difference of the current picture is less than the first threshold, and the second comparison result is that the check value of the current picture is the same as the check value of the previous picture, the current picture is the same as the previous picture; when the first comparison result is that the cumulative grayscale difference of the current picture is equal to the first threshold, and the second comparison result is that the check value of the current picture is the same as the check value of the previous picture, it can be considered that the current picture is the same or different from the previous picture; when the first comparison result is that the cumulative grayscale difference of the current picture is greater than the first threshold, or the second comparison result is that the check value of the current picture is different from the check value of the previous picture, the current picture is different from the previous picture.

[0050] In some embodiments, the picture detection module 140 is further configured to: in response to the current picture being the same as the previous picture, determine whether the current picture is a static picture according to the number of consecutive frames of the current identical picture and a second threshold. When the number of consecutive frames is greater than the second threshold, the current picture is a static picture; when the number of consecutive frames is equal to the second threshold, the current picture can be considered to be a static picture or a dynamic picture; when the number of consecutive frames is greater than the second threshold, the current picture is considered to be a dynamic picture. In practical applications, the second threshold can be flexibly set according to needs.

[0051] In summary, the technical solution provided by the embodiment of the present application determines whether the two frames are the same based on the grayscale values ​​of the current picture and the previous picture. When the current picture is the same as the previous picture, it determines whether the current picture is a static picture based on the number of consecutive frames of the current same picture. Compared with the technical solution that the current picture is considered to be a static picture when the current picture is the same as the previous picture, the embodiment of the present application introduces the detection of the number of consecutive frames of the current same picture, improves the detection reliability of static pictures, and avoids frequent switching of refresh rates due to frequent identification as static pictures, thereby ensuring the display effect and stability of the display device. In addition, the embodiment of the present application determines the cumulative grayscale difference and / or check value based on the grayscale values ​​of the current picture and the previous picture to determine whether the two frames are the same. The judgment method is flexible, and the combination of multiple judgment methods helps to improve reliability.

[0052] See also Figure 4 , Figure 4 is a schematic diagram of a display device provided in an embodiment of the present application. The display device includes a display control system 100, a power management chip 200 and a source driver chip 300. In addition, the display device may also include a display panel 400. The display device includes but is not limited to: AMOLED (Active Matrix Organic Light Emitting Diode, active matrix organic light emitting diode) display, Micro LED (Micro Light Emitting Diode, micro light emitting diode) display, Mini Led (Miniature Light Emitting Diode, mini light emitting diode) display, etc. In some embodiments, the number of source driver chips 300 can be one or more, Figure 4 Only one source driver chip 300 is used as an example for description, which does not constitute a limitation to the present application.

[0053] For a detailed description of the functions of each module in the display device and the corresponding beneficial effects, please refer to the detailed description of the display control system above, which will not be elaborated here.

[0054] See also Figure 5 , Figure 5 is a flow chart of a display control method provided by an embodiment of the present application. The display control method can be executed by a display control system, such as Figure 1 The display control system shown in FIG. Figure 5 As shown, the display control method may include the following steps:

[0055] Step 510: Control the display device to display a first picture at a first refresh rate;

[0056] Step 520: In response to the current picture being a static picture, controlling the display device to display a second picture at a second refresh rate;

[0057] Step 530: During the blanking period of the second frame, control the power management chip of the display device to stop supplying power to the source driver chip of the display device.

[0058] Among them, the second refresh rate is lower than the first refresh rate.

[0059] In some embodiments, the step 520 includes: in response to the current picture being a static picture, extending the blanking period according to the second refresh rate; and controlling the display device to display the second picture corresponding to the end time of the blanking period.

[0060] In some embodiments, controlling the display device to display the second picture corresponding to the end time of the blanking period includes: performing picture compensation on the second picture corresponding to the end time of the blanking period; and controlling the display device to display the second picture after picture compensation.

[0061] In some embodiments, the display control method further includes: detecting whether the current picture is the same as the previous picture based on the grayscale value of the current picture and the grayscale value of the previous picture of the current picture; and in response to the current picture being the same as the previous picture, detecting whether the current picture is a static picture based on the number of consecutive frames of the current identical picture.

[0062] In some embodiments, the above-mentioned detecting whether the current picture is the same as the previous picture according to the grayscale value of the current picture and the grayscale value of the previous picture includes: determining the cumulative grayscale difference of the current picture according to the grayscale value of the current picture and the grayscale value of the previous picture; and judging whether the current picture is the same as the previous picture according to the cumulative grayscale difference of the current picture and a first threshold value. When the cumulative grayscale difference of the current picture is less than the first threshold value, the current picture is the same as the previous picture.

[0063] In some embodiments, the above-mentioned determining the accumulated grayscale difference of the current picture according to the grayscale value of the current picture and the grayscale value of the previous picture includes: determining the grayscale difference corresponding to the first pixel according to the grayscale value of the first pixel in the current picture and the grayscale value of the second pixel in the previous picture; and determining the accumulated grayscale difference of the current picture according to the grayscale differences respectively corresponding to a plurality of pixels in the current picture. The display position of the first pixel in the current picture is the same as the display position of the second pixel in the previous picture.

[0064] In some embodiments, the above-mentioned detecting whether the current picture is the same as the previous picture according to the grayscale value of the current picture and the grayscale value of the previous picture includes: determining the cumulative grayscale difference of the current picture according to the grayscale value of the current picture and the grayscale value of the previous picture; determining the check value of the current picture according to the cumulative grayscale difference of the current picture; judging whether the current picture is the same as the previous picture according to the check value of the current picture and the check value of the previous picture. Wherein, when the check value of the current picture is the same as the check value of the previous picture, the current picture is the same as the previous picture.

[0065] In some embodiments, determining the check value of the current picture according to the accumulated grayscale difference of the current picture includes: converting the accumulated grayscale difference of the current picture into a check format to obtain a reference value of the current picture; and selecting the check value of the current picture from the reference value of the current picture. The check value is the value of the first component of the reference value.

[0066] In some embodiments, the check format is a bit format; the first component is a first bit combination.

[0067] In some embodiments, the above-mentioned detecting whether the current picture is the same as the previous picture according to the grayscale value of the current picture and the grayscale value of the previous picture of the current picture includes: determining the cumulative grayscale difference of the current picture according to the grayscale value of the current picture and the grayscale value of the previous picture; determining the check value of the current picture according to the cumulative grayscale difference of the current picture; judging whether the current picture is the same as the previous picture according to a first comparison result of the cumulative grayscale difference of the current picture and a first threshold value, and a second comparison result of the check value of the current picture and the check value of the previous picture. Wherein, when the first comparison result is that the cumulative grayscale difference of the current picture is less than the first threshold value, and the second comparison result is that the check value of the current picture is the same as the check value of the previous picture, the current picture is the same as the previous picture.

[0068] In some embodiments, the above-mentioned detecting whether the current picture is a static picture based on the number of consecutive frames of the current same picture includes: judging whether the current picture is a static picture based on the number of consecutive frames of the current same picture and a second threshold; wherein, if the number of consecutive frames is greater than the second threshold, the current picture is a static picture.

[0069] See also Figure 6 , Figure 6 is a flow chart of another display control method provided by an embodiment of the present application. The display control method can be executed by a display control system, such as Figure 1 The display control system shown in FIG. Figure 6 As shown, the display control method may include the following steps 601 to 612.

[0070] Step 601: Set the current number of identical frames N to zero.

[0071] Step 602: Get the current picture.

[0072] Step 603: Determine whether the memory is empty. The memory may be DDR (Double Data Rate Synchronous Dynamic Random Access Memory). The embodiment of the present application may temporarily store the previous screen of the current screen in the memory. If the memory is not empty, execute step 604; otherwise, execute step 612.

[0073] Step 604: Determine whether the current picture is the same as the picture stored in the memory. If yes, execute step 605; otherwise, execute step 606.

[0074] Step 605: Let the current number of identical frames N=N+1.

[0075] Step 606: Set the current number of identical frames N=0.

[0076] Step 607: Determine whether the current number of identical frames N is greater than or equal to a preset threshold. The preset threshold may be the second threshold. If the current number of identical frames N is greater than or equal to the preset threshold, execute step 608; otherwise, execute step 611.

[0077] Step 608: Control the display device to perform image display according to the second refresh rate.

[0078] Step 609: Perform image compensation on the image displayed by the display device.

[0079] Step 610: During the blanking period, control the power management chip of the display device to stop supplying power to the source driver chip of the display device.

[0080] Step 611: Control the display device to perform image display at a first refresh rate.

[0081] Step 612: Update the memory according to the current picture.

[0082] For a detailed description of the various steps in the display control method and the corresponding beneficial effects, please refer to the detailed description of the display control system above, which will not be elaborated here.

[0083] The display control system, display device and display control method provided in the embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A display control system, characterized in that: Applied to a display device, the display control system comprises: A refresh control module is configured to: control the display device to display a first picture at a first refresh rate; and, in response to the current picture being a static picture, control the display device to display a second picture at a second refresh rate; wherein the second refresh rate is less than the first refresh rate; The power management module is configured to: during the blanking period of the second picture, control the power management chip of the display device to stop supplying power to the source driving chip of the display device.

2. The display control system according to claim 1, characterized in that: The refresh control module is further configured to: send a frequency indication signal to the power management module; wherein, when the current picture is the static picture, the frequency indication signal is a first value; The power management module is further configured to: in response to the frequency indication signal being the first value, send a power control signal to the power management chip during a blanking period of the second picture to control the power management chip to stop supplying power to the source driver chip.

3. The display control system according to claim 1, characterized in that: The refresh control module is further configured to: In response to the current picture being the static picture, extending the blanking period according to the second refresh rate; and The display device is controlled to display a second picture corresponding to the end time of the blanking period.

4. The display control system according to claim 3, characterized in that: The display control system also includes a picture compensation module; wherein, The picture compensation module is configured to: perform picture compensation on the second picture corresponding to the end time of the blanking period; The refresh control module is further configured to control the display device to display the second picture after the picture compensation.

5. The display control system according to claim 4, characterized in that: The refresh control module is further configured to: send a frequency indication signal to the picture compensation module; wherein, when the current picture is the static picture, the frequency indication signal is a first value; The picture compensation module is further configured to: in response to the frequency indication signal being the first value, perform picture compensation on a second picture corresponding to an end time of the blanking period.

6. The display control system according to claim 1, characterized in that: The display control system further includes a picture detection module; wherein the picture detection module is configured as follows: Detecting whether the current picture is the same as the previous picture according to the grayscale value of the current picture and the grayscale value of the previous picture of the current picture; and In response to the current picture being the same as the previous picture, whether the current picture is the static picture is detected according to the number of consecutive frames of the current identical pictures.

7. The display control system according to claim 6, characterized in that: The picture detection module is also configured as follows: Determining a cumulative grayscale difference of the current picture according to the grayscale value of the current picture and the grayscale value of the previous picture; Determining a check value of the current picture according to the accumulated grayscale difference of the current picture; Whether the current picture is the same as the previous picture is determined based on a first comparison result of the cumulative grayscale difference of the current picture and a first threshold, and a second comparison result of the check value of the current picture and the check value of the previous picture; wherein, when the first comparison result is that the cumulative grayscale difference of the current picture is less than the first threshold, and the second comparison result is that the check value of the current picture is the same as the check value of the previous picture, the current picture is the same as the previous picture.

8. A display device, characterized in that: The display device comprises: a source driver chip, a power management chip, and a display control system according to any one of claims 1 to 7.

9. A display control method, characterized in that: The method comprises: Controlling the display device to display the first picture at a first refresh rate; In response to the current picture being a static picture, controlling the display device to display a second picture at a second refresh rate; wherein the second refresh rate is less than the first refresh rate; and During the blanking period of the second picture, the power management chip of the display device is controlled to stop supplying power to the source driving chip of the display device.

10. The display control method according to claim 9, characterized in that: In response to the current picture being a static picture, controlling the display device to display the second picture at a second refresh rate includes: In response to the current picture being the static picture, extending the blanking period according to the second refresh rate; and The display device is controlled to display a second picture corresponding to the end time of the blanking period.

11. The display control method according to claim 10, characterized in that: The controlling the display device to display the second picture corresponding to the end time of the blanking period includes: Performing picture compensation on the second picture corresponding to the end time of the blanking period; and The display device is controlled to display the second image after the image compensation.

12. The display control method according to claim 9, characterized in that: The display control method further includes: Detecting whether the current picture is the same as the previous picture according to the grayscale value of the current picture and the grayscale value of the previous picture of the current picture; and In response to the current picture being the same as the previous picture, whether the current picture is the static picture is detected according to the number of consecutive frames of the current identical pictures.

13. The display control method according to claim 12, characterized in that: The detecting whether the current picture is the same as the previous picture according to the grayscale value of the current picture and the grayscale value of the previous picture of the current picture comprises: Determining a cumulative grayscale difference of the current picture according to the grayscale value of the current picture and the grayscale value of the previous picture; Determining a check value of the current picture according to the accumulated grayscale difference of the current picture; Whether the current picture is the same as the previous picture is determined based on a first comparison result of the cumulative grayscale difference of the current picture and a first threshold, and a second comparison result of the check value of the current picture and the check value of the previous picture; wherein, when the first comparison result is that the cumulative grayscale difference of the current picture is less than the first threshold, and the second comparison result is that the check value of the current picture is the same as the check value of the previous picture, the current picture is the same as the previous picture.

Images