Liquid crystal display device and black frame insertion display method

Abstract

The embodiment of the invention belongs to the display technology, and provides liquid crystal display equipment and a black frame insertion display method. The liquid crystal display device comprises a display panel, a backlight module, a time sequence control panel and a processor. The backlight module comprises a driving circuit and a backlight source. The processor divides the refresh time into a plurality of sub-frame times, and further determines the driving time corresponding to the pixel point and the target driving voltage corresponding to the driving time according to the first gray scale, the second gray scale, and the corresponding relationship between the preset gray scale corresponding to the sub-frame time and the driving voltage; and according to the number of the driving times corresponding to the pixel points, determining target black frame insertion time, so that the target black frame insertion time is shorter than the original black frame insertion time. The time sequence control panel controls the display panel to refresh in the sub-frame time, and target driving voltage is applied to the liquid crystal molecules in the driving time; and the driving circuit turns off the backlight source within the target black frame insertion time. According to the scheme, the determined target black frame insertion time is smaller than the original black frame insertion time, so that the display brightness is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to display technology, and more specifically, to a liquid crystal display device and a black insertion display method. Background Art

[0002] With the development of technology, display devices have evolved from the original cathode ray tube (CRT) display devices to the current liquid crystal display devices. When the liquid crystal display device displays an image, for the liquid crystal molecules corresponding to each pixel, the overdrive (OD) value is determined based on the grayscale of the pixel in the previous frame of the current frame image and the grayscale of the pixel in the current frame image. Then, during the refresh time of the current frame image, the driving voltage corresponding to the OD value is applied to the liquid crystal molecules, and the liquid crystal molecules can rotate to the corresponding position to achieve color adjustment.

[0003] The rotation time of liquid crystal molecules is also called liquid crystal response time. For a pixel, the greater the difference between the grayscale of the previous frame image and the current frame image, the longer the liquid crystal response time. When receiving the grayscale corresponding to the current frame image, the pixel will still display the color in the previous frame image, and there will be a tailing phenomenon. In the prior art, in order to alleviate the tailing phenomenon, the black frame insertion (BFI) technology is usually used to divide the refresh time corresponding to a frame image into black insertion time and non-black insertion time in sequence; the time when the liquid crystal molecules start to rotate is the same as the start time of the black insertion time. When the liquid crystal molecules start to rotate, the backlight source is turned off, and the backlight source is kept off during the black insertion time, which can effectively alleviate the tailing phenomenon.

[0004] However, if the backlight source is turned off during the black insertion time within the refresh time, a longer black insertion time will reduce the time the backlight source is on, resulting in lower display brightness. Summary of the invention

[0005] The embodiments of the present application provide a liquid crystal display device and a black insertion display method, which are used to solve the problem in the prior art that a long black insertion time reduces the time when the backlight source is on, resulting in lower display brightness.

[0006] In a first aspect, an embodiment of the present application provides a liquid crystal display device, the liquid crystal display device comprising:

[0007] A processor, the processor being configured to:

[0008] Obtaining a first grayscale of a pixel in a previous frame of an image of a current frame, a second grayscale of a pixel in the current frame of an image, and an original black insertion time;

[0009] Dividing the refresh time corresponding to the current frame image into a plurality of sub-frame times;

[0010] Determine the driving time corresponding to the pixel point and the target driving voltage corresponding to the driving time according to the corresponding relationship between the first gray scale, the second gray scale, the preset gray scale corresponding to the subframe time, and the driving voltage;

[0011] Determine a target black insertion time according to the number of driving times corresponding to the pixel points; wherein the target black insertion time is less than the original black insertion time;

[0012] A timing control board, wherein the timing control board is configured to: control the display panel in the liquid crystal display device to refresh within a subframe time, and apply the target driving voltage to the liquid crystal molecules corresponding to the pixel points within the driving time;

[0013] A driving circuit is configured to turn off a backlight source in the liquid crystal display device within the target black insertion time.

[0014] The beneficial effects of this embodiment: after the processor obtains the first grayscale of the pixel in the previous frame image of the current frame image, the second grayscale of the pixel in the current frame image, and the original black insertion time, the refresh time corresponding to the current frame image is divided into multiple sub-frame times, and then the driving time corresponding to the pixel and the target driving voltage corresponding to the driving time are determined according to the correspondence between the first grayscale, the second grayscale, the preset grayscale corresponding to the sub-frame time, and the driving voltage; then the target black insertion time is determined according to the number of driving times corresponding to the pixel, so that the target black insertion time is less than the original black insertion time. The timing control board controls the display panel to refresh within the sub-frame time, and applies the target driving voltage to the liquid crystal molecules within the driving time; the driving circuit turns off the backlight source within the target black insertion time. This solution effectively reduces the black insertion time and improves the display brightness by determining that the target black insertion time is less than the original black insertion time.

[0015] In some embodiments of the present application, when the processor is configured to determine the driving time corresponding to the pixel point and the target driving voltage corresponding to the driving time according to the corresponding relationship between the first gray scale, the second gray scale, the preset gray scale corresponding to the subframe time, and the driving voltage, the processor is specifically configured as follows:

[0016] According to the correspondence between the preset gray scale and the driving voltage, determining whether there is a corresponding driving voltage to be selected between the first gray scale and the second gray scale;

[0017] If there are corresponding drive voltages to be selected between the first grayscale and the second grayscale, a first setting mode is adopted to determine a drive time corresponding to the pixel point and a target drive voltage corresponding to the drive time;

[0018] If there is no corresponding drive voltage to be selected between the first grayscale and the second grayscale, a second setting mode is adopted to determine the drive time corresponding to the pixel point and the target drive voltage corresponding to the drive time;

[0019] The first setting mode uses one subframe time as the driving time corresponding to the pixel point, and the second setting mode uses multiple subframe times as the driving time corresponding to the pixel point.

[0020] The beneficial effects of this embodiment are as follows: by judging whether there is a corresponding drive voltage to be selected between the first gray scale and the second gray scale, it is judged whether the liquid crystal molecules can complete the rotation within the first subframe time. When there is a corresponding drive voltage to be selected, the first setting mode is adopted to determine the drive time and the target drive voltage; when there is no corresponding drive voltage to be selected, the second setting mode is adopted to determine the drive time and the target drive voltage, thereby effectively improving the accuracy of the drive time and the target drive voltage.

[0021] In some embodiments of the present application, when the processor is configured to adopt the first setting mode to determine the driving time corresponding to the pixel point and the target driving voltage corresponding to the driving time, it is specifically configured as follows:

[0022] Using the first sub-frame time among the multiple sub-frame times as the driving time corresponding to the pixel point;

[0023] The selected driving voltage is used as the target driving voltage corresponding to the driving time.

[0024] The beneficial effects of this embodiment are as follows: in the first setting mode, it indicates that the liquid crystal molecules can complete the rotation within the first subframe time, and the first subframe time among multiple subframe times is used as the driving time corresponding to the pixel point, and the selected driving voltage is used as the target driving voltage corresponding to the driving time, which effectively improves the accuracy of the driving time and the target driving voltage, and also reduces the liquid crystal rotation time.

[0025] In some embodiments of the present application, when the processor is configured to adopt the second setting mode to determine the driving time corresponding to the pixel point and the target driving voltage corresponding to the driving time, it is specifically configured as follows:

[0026] Determining at least one intermediate gray scale according to a correspondence between the first gray scale, the second gray scale, the preset gray scale, and the driving voltage;

[0027] The number of the front intermediate gray scales in the plurality of sub-frame times plus one sub-frame time is used as the driving time corresponding to the pixel point;

[0028] Determine a start grayscale and an end grayscale corresponding to a driving time from the first grayscale, the second grayscale, and the at least one intermediate grayscale;

[0029] The target driving voltage corresponding to the driving time is determined according to the starting gray scale, the ending gray scale, and the corresponding relationship between the preset gray scale and the driving voltage.

[0030] The beneficial effects of this embodiment are as follows: in the second setting mode, it indicates that the liquid crystal molecules cannot complete the rotation within the first subframe time, and the intermediate gray scale is first determined, and then the driving time is determined according to the number of intermediate gray scales, and then the target driving voltage is determined according to the corresponding relationship between the set gray scale and the driving voltage, which effectively improves the accuracy of the driving time and the target driving voltage, and also reduces the liquid crystal rotation time.

[0031] In some embodiments of the present application, when the processor is configured to determine at least one intermediate grayscale according to the correspondence between the first grayscale, the second grayscale, the preset grayscale and the driving voltage, the processor is specifically configured as follows:

[0032] Using the first grayscale as an initial grayscale;

[0033] Determining an intermediate grayscale according to the correspondence between the initial grayscale, the preset grayscale and the driving voltage;

[0034] According to the correspondence between the preset gray scale and the driving voltage, determining whether there is a corresponding first candidate voltage between the intermediate gray scale and the second gray scale;

[0035] If there is no corresponding first candidate voltage between the intermediate gray scale and the second gray scale, take the intermediate gray scale as the initial gray scale, and re-determine an intermediate gray scale based on the correspondence between the initial gray scale, the preset gray scale and the driving voltage, and re-judge whether there is a corresponding first candidate voltage between the newly determined intermediate gray scale and the second gray scale; if there is no corresponding first candidate voltage between the newly generated intermediate gray scale and the second gray scale, repeat this step until there is a corresponding first candidate voltage between the intermediate gray scale and the second gray scale.

[0036] The beneficial effects of this embodiment are as follows: by first using the first gray scale as the initial gray scale, determining an intermediate gray scale, judging whether there is a corresponding first candidate voltage between the intermediate gray scale and the second gray scale, and if not, using the intermediate gray scale just determined as the initial gray scale, and then determining another intermediate gray scale, and so on, until there is a corresponding first candidate voltage between the intermediate gray scale and the second gray scale, and obtaining all the intermediate gray scales, so that when the liquid crystal molecules rotate according to the driving voltage determined by the intermediate gray scale, the rotation time can be reduced.

[0037] In some embodiments of the present application, when the processor is configured to determine an intermediate grayscale according to the correspondence between the initial grayscale, the preset grayscale and the driving voltage, the processor is specifically configured as follows:

[0038] Determining a second selected voltage corresponding to the initial gray scale according to the correspondence between the preset gray scale and the driving voltage;

[0039] The largest voltage among the second candidate voltages and the grayscale corresponding to the initial grayscale are used as the intermediate grayscale.

[0040] The beneficial effect of this embodiment is that by using the largest voltage among the second candidate voltages and the gray scale corresponding to the initial gray scale as the intermediate gray scale, the rotation time of the liquid crystal molecules can be reduced when they rotate according to the driving voltage determined by the intermediate gray scale.

[0041] In some embodiments of the present application, when the processor is configured to determine the target black insertion time according to the number of driving times corresponding to the pixel points, the processor is specifically configured as follows:

[0042] According to the number of driving times corresponding to the pixel points, determining the largest target driving time number among the number of driving times corresponding to the pixel points;

[0043] Determining whether the target driving time quantity is greater than 1;

[0044] If the target driving time is greater than 1, the third setting mode is adopted to determine the target black insertion time;

[0045] If the target driving time is equal to 1, the fourth setting mode is adopted to determine the target black insertion time;

[0046] The third setting mode uses a plurality of sub-frame times as the target black insertion time, and the fourth setting mode uses one sub-frame time as the target black insertion time.

[0047] The beneficial effects of this embodiment are as follows: by first determining the largest number of target driving times among the number of driving times corresponding to the pixel points, and then determining whether to adopt the third setting mode or the fourth setting mode according to whether the target driving time number is greater than 1, the target black insertion time is determined, so that the target black insertion time is less than the original black insertion time, thereby increasing the display brightness.

[0048] In some embodiments of the present application, the third setting mode is:

[0049] Among the multiple sub-frame times, the target driving time amount minus one sub-frame time is used as the target black insertion time;

[0050] The target driving time amount minus the sum of one subframe time is less than the original black insertion time.

[0051] Beneficial effects of this embodiment: In the third setting mode, the number of previous target driving times among multiple sub-frame times is reduced by one sub-frame time as the target black insertion time, which ensures that the target black insertion time is less than the original black insertion time, and can improve the display brightness.

[0052] In some embodiments of the present application, the fourth setting mode is:

[0053] Using the first sub-frame time among the multiple sub-frame times as the target black insertion time;

[0054] The subframe time is shorter than the original black insertion time.

[0055] Beneficial effects of this embodiment: In the fourth setting mode, the first sub-frame time among the multiple sub-frame times is used as the target black insertion time, which ensures that the target black insertion time is less than the original black insertion time, and can improve the display brightness.

[0056] In a second aspect, an embodiment of the present application provides a black insertion display method, comprising:

[0057] Obtaining a first grayscale of a pixel in a previous frame of the current frame, a second grayscale of a pixel in the current frame, and an original black insertion time;

[0058] Divide the refresh time corresponding to the current frame image into a plurality of sub-frame times; wherein the sub-frame time is shorter than the original black insertion time;

[0059] According to the correspondence between the preset grayscale corresponding to the subframe time and the driving voltage, if it is determined that the first grayscale and the second grayscale have corresponding to the selected driving voltage, the first subframe time among the multiple subframe times is used as the target black insertion time and the driving time corresponding to the pixel point;

[0060] Using the selected driving voltage as the target driving voltage corresponding to the driving time;

[0061] Controlling the display panel to refresh within the subframe time, and applying the target driving voltage to the liquid crystal molecules corresponding to the pixel points within the driving time;

[0062] The backlight source is turned off within the target black insertion time.

[0063] The beneficial effects of this embodiment are as follows: after obtaining the first grayscale of the pixel in the previous frame image of the current frame image, the second grayscale of the pixel in the current frame image, and the original black insertion time, the refresh time corresponding to the current frame image is divided into multiple sub-frame times that are less than the original black insertion time, and then according to the correspondence between the preset grayscale and the driving voltage corresponding to the sub-frame time, if it is determined that there is a corresponding to-be-selected driving voltage for the first grayscale and the second grayscale, the first sub-frame time among the multiple sub-frame times is used as the target black insertion time and the driving time corresponding to the pixel, and the to-be-selected driving voltage is used as the target driving voltage corresponding to the driving time. The timing control board controls the display panel to refresh within the sub-frame time, and applies the target driving voltage to the liquid crystal molecules within the driving time; the driving circuit turns off the backlight source within the target black insertion time. This solution effectively reduces the black insertion time and improves the display brightness by determining that the target black insertion time is less than the original black insertion time. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] In order to more clearly illustrate the implementation methods in the embodiments of the present application or the related technologies, the following is a brief introduction to the drawings required for use in the embodiments or the related technology descriptions. Obviously, the drawings described below are some embodiments of the present application, and a person skilled in the art can also obtain other drawings based on these drawings.

[0065] Figure 1 A schematic diagram of the structure of the liquid crystal display device provided in this application;

[0066] Figure 2 The corresponding relationship between grayscale and time provided in this application is shown as follows Figure 1 ;

[0067] Figure 3 A flowchart of the black insertion display method provided in this application;

[0068] Figure 4 A schematic diagram of subframe time provided for this application;

[0069] Figure 5 The corresponding relationship between grayscale and time provided in this application is shown in FIG. Figure 2 ;

[0070] Figure 6 The corresponding relationship between grayscale and time provided in this application is shown in FIG. Figure 3 ;

[0071] Figure 7 Schematic diagram of the process of determining the driving time and target driving voltage provided in this application Figure 1 ;

[0072] Figure 8Schematic diagram of the process of determining the driving time and target driving voltage provided in this application Figure 2 ;

[0073] Fig. 9 This is a schematic structural diagram of an embodiment of a black insertion display device provided in the present application. DETAILED DESCRIPTION

[0074] In order to make the purpose, implementation mode and advantages of the present application clearer, the exemplary implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0075] Based on the exemplary embodiments described in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the claims attached to this application. In addition, although the disclosure in this application is introduced according to one or several exemplary examples, it should be understood that each aspect of the disclosure can also constitute a complete implementation method separately.

[0076] It should be noted that the brief description of terms in this application is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their ordinary and common meanings.

[0077] The terms "first", "second", "third", etc. in the specification and claims of this application and the above drawings are used to distinguish similar or similar objects or entities, and do not necessarily mean to limit a specific order or sequence, unless otherwise indicated. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, for example, they can be implemented according to orders other than those given in the diagrams or descriptions of the embodiments of this application.

[0078] In addition, the terms "include" and "have" and any variations thereof are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to those components expressly listed but may include other components not expressly listed or inherent to such products or devices.

[0079] With the development of technology, liquid crystal display devices are popular among people due to their small size and low energy consumption.

[0080] For example, Figure 1 A schematic diagram of the structure of the liquid crystal display device provided in this application, such as Figure 1As shown, the liquid crystal display device includes a display panel, a backlight module, a timing controller (TCON) board and a processor, and the backlight module includes a driving circuit and a backlight source.

[0081] The processor is connected to the TCON board and the driving circuit respectively. The TCON board is connected to the display panel. The TCON board controls the liquid crystal molecules in the display panel to rotate.

[0082] The driving circuit is connected to the backlight source, and the driving circuit controls the turning on and off of the backlight source, which provides backlight for the display panel.

[0083] When a liquid crystal display device displays an image, for each liquid crystal molecule corresponding to a pixel in the display panel, an overdrive (OD) value is determined based on the grayscale of the pixel in the previous frame of the current frame and the grayscale of the pixel in the current frame.

[0084] Then, during the refresh time of the current frame image, a driving voltage corresponding to the OD value is applied to the liquid crystal molecules, and the liquid crystal molecules can rotate to the corresponding positions, while the backlight source provides backlight to achieve color change.

[0085] The rotation time of liquid crystal molecules is also called the liquid crystal response time. For a pixel, the greater the difference in grayscale between the previous frame image and the current frame image, the longer the liquid crystal response time. When receiving the grayscale corresponding to the current frame image, the pixel will still display the color in the previous frame image, and a tailing phenomenon will occur.

[0086] In the prior art, in order to alleviate the tailing phenomenon, the black frame insertion (BFI) technology is usually used to divide the refresh time corresponding to a frame of image into a black insertion time and a non-black insertion time in sequence; the time when the liquid crystal molecules start to rotate is the same as the start time of the black insertion time. When the liquid crystal molecules start to rotate, the backlight source is turned off and the backlight source is kept off during the black insertion time, which can effectively alleviate the tailing phenomenon.

[0087] However, if the backlight source is turned off during the black insertion time within the refresh time, a longer black insertion time will reduce the time the backlight source is on, resulting in lower display brightness.

[0088] For example, Figure 2 The corresponding relationship between grayscale and time provided in this application is shown as follows Figure 1 ,like Figure 2 As shown, the grayscale of the pixel in the previous frame image of the current frame image is 20, and the grayscale of the pixel in the current frame image is 100. A driving voltage is applied to the liquid crystal molecules, and the liquid crystal molecules rotate from the rotation angle corresponding to the grayscale 20 to the rotation angle corresponding to the grayscale 100 through the liquid crystal response time.

[0089] In order to improve the tailing phenomenon, the black insertion time should be at least the liquid crystal response time. Figure 2 It can be seen that the liquid crystal response time accounts for most of the refresh time, so the black insertion time is also longer, which reduces the time when the backlight source is on, resulting in lower display brightness.

[0090] In response to the problems existing in the prior art, the inventors discovered during the research on the black insertion display method that the low display brightness is due to the long black insertion time. Therefore, the display brightness can be improved by reducing the black insertion time. However, this will aggravate the tailing phenomenon. Therefore, it is also necessary to reduce the liquid crystal response time to achieve both improving the tailing phenomenon and improving the display brightness.

[0091] The refresh time can be divided into multiple sub-frame times, and then the driving time corresponding to the pixel and the target driving voltage corresponding to the driving time can be determined according to the corresponding relationship between the first gray scale, the second gray scale, the preset gray scale corresponding to the sub-frame time, and the driving voltage; and then the target black insertion time can be determined according to the number of driving times corresponding to the pixel, so that the target black insertion time is less than the original black insertion time. Turning off the backlight source during the target black insertion time and applying the target driving voltage corresponding to the driving time to the liquid crystal molecules during the driving time can both improve the tailing phenomenon and increase the display brightness. Based on the above inventive concept, the black insertion display scheme in this application is designed.

[0092] The following is an example of an application scenario of the black insertion display method provided in this application.

[0093] Exemplarily, in this scenario, the user uses an LCD display device to watch a video. When the LCD display device acquires a current frame image, since the previous frame image of the current frame image has been acquired before, the first gray scale of the pixel points in the previous frame image of the current frame image and the second gray scale of the pixel points in the current frame image can be acquired, and the original black insertion time can also be acquired.

[0094] Then, the refresh time corresponding to the current frame image is divided into a plurality of sub-frame times;

[0095] Then, according to the corresponding relationship between the first gray scale, the second gray scale, the preset gray scale corresponding to the subframe time and the driving voltage, the driving time corresponding to the pixel point and the target driving voltage corresponding to the driving time are determined;

[0096] Then, according to the number of driving times corresponding to the pixel points, the target black insertion time is determined, so that the target black insertion time is less than the original black insertion time.

[0097] Then, the current frame image is refreshed in each subframe time, the backlight source is turned off in the target black insertion time, and the target driving voltage corresponding to the driving time is applied to the liquid crystal molecules in the driving time. The displayed image can improve the tailing phenomenon and increase the display brightness.

[0098] It should be noted that the above scenario is only an example of an application scenario provided by an embodiment of the present application. The embodiment of the present application does not limit the actual form of the various devices included in the scenario. In the specific application of the solution, it can be set according to actual needs.

[0099] The technical solution of the present application is described in detail below through specific embodiments. It should be noted that the following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0100] Figure 3 This is a flow chart of the black insertion display method provided in the present application. The execution subject of the method may be a liquid crystal display device. The method in this embodiment may be implemented by software, hardware, or a combination of software and hardware.

[0101] like Figure 3 As shown, the processor in the liquid crystal display device is configured to perform the following steps:

[0102] S301: Obtain the first grayscale of a pixel in a previous frame image of the current frame image, the second grayscale of a pixel in the current frame image, and an original black insertion time.

[0103] When the processor acquires the current frame image, it acquires the first grayscale of the pixel in the previous frame image of the current frame image, the second grayscale of the pixel in the current frame image, and the original black insertion time.

[0104] The original black insertion time refers to the black insertion time used in the prior art.

[0105] S302: Divide the refresh time corresponding to the current frame image into a plurality of sub-frame times.

[0106] After the processor obtains the original black insertion time, the high refresh technology can be used to evenly divide the refresh time corresponding to the current frame image into multiple sub-frame times according to the original black insertion time.

[0107] For example, Figure 4 The subframe time diagram provided for this application is as follows: Figure 4 As shown, the refresh time is divided into three sub-frame times, and each sub-frame time is equal.

[0108] S303: Determine the driving time corresponding to the pixel point and the target driving voltage corresponding to the driving time according to the corresponding relationship between the first gray scale, the second gray scale, the preset gray scale corresponding to the subframe time, and the driving voltage.

[0109] After the processor divides the refresh time corresponding to the current frame image into multiple sub-frame times, it obtains the corresponding relationship between the preset grayscale and the driving voltage according to the sub-frame time, and then combines the first grayscale and the second grayscale to determine the driving time corresponding to the pixel point and the target driving voltage corresponding to the driving time.

[0110] Specifically, according to the correspondence between the preset grayscale and the driving voltage, it is determined whether there is a corresponding driving voltage to be selected between the first grayscale and the second grayscale;

[0111] If there are corresponding drive voltages to be selected between the first grayscale and the second grayscale, indicating that the liquid crystal molecules can complete the rotation within the first subframe time, the first setting mode is adopted to determine the drive time corresponding to the pixel point and the target drive voltage corresponding to the drive time.

[0112] If there is no corresponding drive voltage to be selected between the first grayscale and the second grayscale, it means that the liquid crystal molecules need to complete the rotation within multiple subframe times, and the second setting mode is adopted to determine the drive time corresponding to the pixel point and the target drive voltage corresponding to the drive time;

[0113] The first setting mode uses one subframe time as the driving time corresponding to the pixel point, and the second setting mode uses multiple subframe times as the driving time corresponding to the pixel point.

[0114] In the prior art, the original driving voltage and original liquid crystal response time required for the liquid crystal molecules to rotate from the rotation angle corresponding to the first gray scale to the rotation angle corresponding to the second gray scale, the original driving voltage is less than the driving voltage corresponding to the target overdrive value, and the original liquid crystal response time is also less than the subframe time.

[0115] For example, Figure 5 The corresponding relationship between grayscale and time provided in this application is shown in FIG. Figure 2 ,like Figure 5 As shown, the grayscale of the pixel in the previous frame image of the current frame image is 20, and the grayscale of the pixel in the current frame image is 100.

[0116] When the first grayscale and the second grayscale have corresponding drive voltages to be selected, the first subframe time of the multiple subframe times is the drive time, and the liquid crystal molecules can complete the rotation from the rotation angle corresponding to the first grayscale to the rotation angle corresponding to the second grayscale in the first subframe time. Figure 2 It can be seen that the rotation time is reduced.

[0117] For example, Figure 6The corresponding relationship between grayscale and time provided in this application is shown in FIG. Figure 3 ,like Figure 6 As shown, the grayscale of the pixel in the previous frame image of the current frame image is 20, and the grayscale of the pixel in the current frame image is 100.

[0118] When there is no corresponding drive voltage to be selected between the first grayscale and the second grayscale, the first subframe time and the second subframe time of the multiple subframe times are used as the drive time, and the liquid crystal molecules can complete the rotation from the rotation angle corresponding to the first grayscale to the rotation angle corresponding to the second grayscale in the first two subframe times. Figure 2 It can be seen that the actual rotation time is less than Figure 2 The rotation time in can be reduced.

[0119] It should be noted that, for the correspondence relationship between the preset gray scale and the driving voltage corresponding to the subframe time, the correspondence relationship is a plurality of sub-correspondence relationships, and each sub-correspondence relationship is a correspondence relationship between two gray scales and one driving voltage.

[0120] For example, if the driving voltage corresponding to grayscale A and grayscale B is V1, it means that when the driving voltage V1 is applied to the liquid crystal molecules, the liquid crystal molecules can rotate from the angle corresponding to grayscale A to the angle corresponding to grayscale B within the subframe time.

[0121] In the correspondence between the preset grayscale and the driving voltage, if there is no corresponding driving voltage between grayscale A and grayscale B, it means that the liquid crystal molecules cannot rotate from the angle corresponding to grayscale A to the angle corresponding to grayscale B within the subframe time.

[0122] S304: Determine a target black insertion time according to the number of driving times corresponding to the pixel points. After obtaining the driving time, the processor determines a target black insertion time according to the number of driving times corresponding to the pixel points, and the target black insertion time is less than the original black insertion time.

[0123] Specifically, according to the number of driving times corresponding to the pixels, the largest target driving time number among the driving times corresponding to the pixels is determined.

[0124] Since each pixel has a corresponding driving time, the number of driving times corresponding to each pixel can be determined, and then the largest number among them is used as the target driving time number.

[0125] Then determine whether the target driving time quantity is greater than 1.

[0126] If the target driving time number is greater than 1, the third setting mode is adopted to determine the target black insertion time.

[0127] If the target driving time number is equal to 1, the fourth setting mode is adopted to determine the target black insertion time.

[0128] The third setting mode uses a plurality of sub-frame times as the target black insertion time, and the fourth setting mode uses one sub-frame time as the target black insertion time.

[0129] The timing control board is configured to: control the display panel to refresh within the subframe time, and apply a target driving voltage to the liquid crystal molecules within the driving time.

[0130] The driving circuit is configured to turn off the backlight source within the target black insertion time.

[0131] The liquid crystal display device provided in this embodiment includes a display panel, a backlight module, a timing control board and a processor, and the backlight module includes a driving circuit and a backlight source. After the processor obtains the first grayscale of the pixel in the previous frame image of the current frame image, the second grayscale of the pixel in the current frame image, and the original black insertion time, the refresh time corresponding to the current frame image is divided into multiple sub-frame times, and then the driving time corresponding to the pixel and the target driving voltage corresponding to the driving time are determined according to the correspondence between the first grayscale, the second grayscale, the preset grayscale corresponding to the sub-frame time and the driving voltage; and then the target black insertion time is determined according to the number of driving times corresponding to the pixel, so that the target black insertion time is less than the original black insertion time. The timing control board controls the display panel to refresh within the sub-frame time, applies the target driving voltage to the liquid crystal molecules within the driving time; and the driving circuit turns off the backlight source within the target black insertion time. This solution effectively reduces the black insertion time and improves the display brightness by determining that the target black insertion time is less than the original black insertion time.

[0132] Further, based on the above embodiment, the embodiment of the present application describes the case where the processor adopts the first setting mode to determine the driving time and the target driving voltage. Figure 7 Schematic diagram of the process of determining the driving time and target driving voltage provided in this application Figure 1 , wherein the processor in the liquid crystal display device is configured to perform the following steps:

[0133] S701: Using the first sub-frame time among the multiple sub-frame times as the driving time corresponding to the pixel point.

[0134] S702: Using the drive voltage to be selected as the target drive voltage corresponding to the drive time.

[0135] When there are corresponding selected driving voltages between the first gray scale and the second gray scale, it means that the selected driving voltage is applied to the liquid crystal molecules, and the liquid crystal molecules can complete the rotation within the first subframe time. In this case, the first setting mode is adopted to determine the driving time corresponding to the pixel point and the target driving voltage corresponding to the driving time.

[0136] The first sub-frame time among the multiple sub-frame times is used as the driving time corresponding to the pixel point, and the driving voltage to be selected is used as the target driving voltage corresponding to the driving time.

[0137] The liquid crystal display device provided in this embodiment uses the first subframe time among multiple subframe times as the driving time corresponding to the pixel point and uses the selected driving voltage as the target driving voltage corresponding to the driving time, so that the liquid crystal molecules can complete the rotation within the first subframe time, thereby reducing the rotation time.

[0138] Furthermore, based on the above-mentioned embodiment, the embodiment of the present application describes the case where the processor adopts the second setting mode to determine the driving time and the target driving voltage. Figure 8 Schematic diagram of the process of determining the driving time and target driving voltage provided in this application Figure 2 , wherein the processor in the liquid crystal display device is configured to perform the following steps:

[0139] S801: Determine at least one intermediate gray scale according to a correspondence relationship among a first gray scale, a second gray scale, a preset gray scale, and a driving voltage.

[0140] When there is no corresponding selected driving voltage between the first grayscale and the second grayscale, it means that the liquid crystal molecules cannot complete the rotation within the first subframe time. The second setting mode is then used to determine the driving time corresponding to the pixel point and the target driving voltage corresponding to the driving time.

[0141] At least one intermediate gray scale is determined according to the corresponding relationship among the first gray scale, the second gray scale, the preset gray scale and the driving voltage.

[0142] Specifically, the first gray scale is used as the initial gray scale, and then an intermediate gray scale is determined according to the corresponding relationship among the initial gray scale, the preset gray scale and the driving voltage.

[0143] That is, according to the corresponding relationship between the preset gray scale and the driving voltage, the second selected voltage corresponding to the initial gray scale is determined.

[0144] Since each sub-correspondence in the correspondence between the preset gray scale and the driving voltage is a correspondence between two gray scales and one driving voltage, a plurality of corresponding second selectable voltages can be determined according to the initial gray scale.

[0145] The largest voltage among the second candidate voltages and the gray scale corresponding to the initial gray scale are used as the intermediate gray scale.

[0146] When the target driving voltage determined according to the intermediate gray scale is subsequently applied to the liquid crystal molecules for rotation, the liquid crystal molecules operate according to the maximum achievable driving voltage, thereby reducing the rotation time.

[0147] Then, according to the corresponding relationship between the preset gray scale and the driving voltage, it is determined whether there is a corresponding first candidate voltage between the intermediate gray scale and the second gray scale.

[0148] If there is a first candidate voltage corresponding to the middle gray scale and the second gray scale, then the determination of the middle gray scale is stopped.

[0149] If there is no corresponding first candidate voltage between the intermediate gray scale and the second gray scale, the intermediate gray scale is taken as the initial gray scale, and an intermediate gray scale is re-determined based on the correspondence between the initial gray scale, the preset gray scale and the driving voltage, and it is re-determined whether there is a corresponding first candidate voltage between the newly determined intermediate gray scale and the second gray scale. If there is no corresponding first candidate voltage between the newly generated intermediate gray scale and the second gray scale, repeat this step until there is a corresponding first candidate voltage between the intermediate gray scale and the second gray scale.

[0150] S802: Add one sub-frame time to the number of front intermediate grayscales in the multiple sub-frame times as the driving time corresponding to the pixel point.

[0151] After the processor determines the intermediate gray scale, the number of the first intermediate gray scales in the multiple sub-frame times plus one sub-frame time is used as the driving time corresponding to the pixel point.

[0152] S803: Determine a start grayscale and an end grayscale corresponding to the driving time from the first grayscale, the second grayscale, and at least one intermediate grayscale.

[0153] After determining the driving time, the processor determines a start grayscale and an end grayscale corresponding to the driving time from the first grayscale, the second grayscale, and at least one intermediate grayscale.

[0154] If the first grayscale is smaller than the second grayscale, the first grayscale, the second grayscale, and at least one intermediate grayscale are arranged in order from small to large to obtain a grayscale sequence; if the first grayscale is larger than the second grayscale, the first grayscale, the second grayscale, and at least one intermediate grayscale are arranged in order from large to small to obtain a grayscale sequence.

[0155] The first grayscale and the second grayscale in the grayscale sequence are used as the starting grayscale and the ending grayscale corresponding to the first driving time respectively; the second grayscale and the third grayscale in the grayscale sequence are used as the starting grayscale and the ending grayscale corresponding to the second driving time respectively; and the starting grayscale and the ending grayscale corresponding to each driving time are determined in turn.

[0156] Exemplarily, the first grayscale is 20, the second grayscale is 100, and there are two intermediate grayscales, 60 and 90, so there will be three driving times. For the first driving time, the first grayscale 20 is used as its corresponding starting grayscale, and the intermediate grayscale 60 is used as its corresponding ending grayscale.

[0157] For the second driving time, the middle gray scale 60 is used as the corresponding starting gray scale, and the middle gray scale 90 is used as the corresponding ending gray scale.

[0158] For the third driving time, the middle gray scale of 90 is used as the corresponding starting gray scale, and the second gray scale of 100 is used as the corresponding ending gray scale.

[0159] S804: Determine a target driving voltage corresponding to the driving time according to the starting gray scale, the ending gray scale, and the corresponding relationship between the preset gray scale and the driving voltage.

[0160] After the processor determines the starting grayscale and the ending grayscale, for each driving time, the driving voltage corresponding to the starting grayscale and the ending grayscale is determined according to the starting grayscale and the ending grayscale corresponding to the driving time, and the correspondence between the preset grayscale and the driving voltage, and then the driving voltage is used as the target driving voltage corresponding to the driving time.

[0161] The liquid crystal display device provided in this embodiment first determines the intermediate gray scale in the second setting mode, then determines the driving time according to the number of the intermediate gray scales, and then determines the target driving voltage according to the corresponding relationship between the set gray scale and the driving voltage, thereby effectively improving the accuracy of the driving time and the target driving voltage and reducing the liquid crystal rotation time.

[0162] Furthermore, based on the above embodiment, the embodiment of the present application describes the third setting mode and the fourth setting mode.

[0163] The third setting mode is:

[0164] The target black insertion time is taken as the target black insertion time by reducing the number of previous target driving times among the multiple sub-frame times by one sub-frame time.

[0165] The target driving time amount minus the sum of one subframe time is less than the original black insertion time.

[0166] When the number of target driving times is greater than 1, it indicates that the liquid crystal molecules complete the rotation within a plurality of driving times, and the third setting mode is used to determine the target black insertion time.

[0167] Since each driving time is equal to the subframe time, when the liquid crystal molecules rotate within the driving time, the target driving voltage applied is greater than the original driving voltage, the rotation speed of the liquid crystal molecules increases, the rotation time of the liquid crystal molecules decreases, and the total duration of the driving time also decreases. Therefore, the sum of the target driving time minus one subframe time is less than the original black insertion time.

[0168] It should be noted that the rotation time of each liquid crystal molecule may also be calculated, and the maximum rotation time may be used as the target black insertion time.

[0169] The fourth setting mode is:

[0170] The first sub-frame time among the multiple sub-frame times is used as the target black insertion time;

[0171] The subframe time is shorter than the original black insertion time.

[0172] When the target driving time number is equal to 1, it means that all liquid crystal molecules have completed the rotation within the first subframe time, and the fourth setting mode is used to determine the target black insertion time.

[0173] Since each driving time is equal to the subframe time, when the liquid crystal molecules rotate within the driving time, the target driving voltage applied is greater than the original driving voltage, the rotation speed of the liquid crystal molecules increases, and the rotation time of the liquid crystal molecules decreases, thereby completing the rotation within the first subframe time, and the subframe time is less than the original black insertion time.

[0174] The liquid crystal display device provided in this embodiment uses a plurality of subframe times as target black insertion times through the third setting mode, and uses a subframe time as target black insertion time through the fourth setting mode, so that the target black insertion time is shorter than the original black insertion time, thereby increasing display brightness.

[0175] In the present application, a black insertion display method is also provided, and the steps may be:

[0176] Get the first grayscale of the pixel in the previous frame image of the current frame image, the second grayscale of the pixel in the current frame image, and the original black insertion time.

[0177] The refresh time corresponding to the current frame image is divided into a plurality of sub-frame times, wherein the sub-frame time is shorter than the original black insertion time.

[0178] According to the correspondence between the preset grayscale and the driving voltage corresponding to the subframe time, if it is determined that the first grayscale and the second grayscale have corresponding selected driving voltages, the first subframe time among the multiple subframe times is used as the target black insertion time and the driving time corresponding to the pixel point.

[0179] The drive voltage to be selected is used as the target drive voltage corresponding to the drive time.

[0180] The display panel is controlled to be refreshed during the subframe time, and a target driving voltage is applied to the liquid crystal molecules corresponding to the pixel points during the driving time.

[0181] Turn off the backlight during the target black insertion time.

[0182] If there are corresponding drive voltages to be selected for the first grayscale and the second grayscale of all pixels, it means that the liquid crystal molecules corresponding to all pixels can complete the rotation within the first subframe. The first subframe time among multiple subframe times is used as the target black insertion time and the drive time corresponding to the pixel, which can reduce the black insertion time and improve the display brightness.

[0183] For specific implementation steps and technical effects, please refer to the above embodiments, and this application will not repeat them.

[0184] Fig. 9 This is a schematic diagram of the structure of the black insertion display device embodiment provided by the present application; the device can be integrated into the liquid crystal display device in the above method embodiment, and can also be implemented by the liquid crystal display device in the above method embodiment. Fig. 9 As shown, the black insertion display device 90 includes:

[0185] An acquisition module 91 is used to acquire a first grayscale of a pixel in a previous frame image of a current frame image, a second grayscale of a pixel in the current frame image, and an original black insertion time;

[0186] The processing module 92 is used to:

[0187] Dividing the refresh time corresponding to the current frame image into a plurality of sub-frame times;

[0188] Determine the driving time corresponding to the pixel point and the target driving voltage corresponding to the driving time according to the corresponding relationship between the first gray scale, the second gray scale, the preset gray scale corresponding to the subframe time, and the driving voltage;

[0189] Determine a target black insertion time according to the number of driving times corresponding to the pixel points; wherein the target black insertion time is less than the original black insertion time;

[0190] The display module 93 is used for:

[0191] Controlling the display panel in the liquid crystal display device to refresh within a subframe time, and applying the target driving voltage to the liquid crystal molecules corresponding to the pixel points within the driving time;

[0192] The backlight source in the liquid crystal display device is turned off within the target black insertion time.

[0193] Furthermore, the processing module 92 is specifically configured to:

[0194] According to the correspondence between the preset gray scale and the driving voltage, determining whether there is a corresponding driving voltage to be selected between the first gray scale and the second gray scale;

[0195] If there are corresponding drive voltages to be selected between the first grayscale and the second grayscale, a first setting mode is adopted to determine a drive time corresponding to the pixel point and a target drive voltage corresponding to the drive time;

[0196] If there is no corresponding drive voltage to be selected between the first grayscale and the second grayscale, a second setting mode is adopted to determine the drive time corresponding to the pixel point and the target drive voltage corresponding to the drive time;

[0197] The first setting mode uses one subframe time as the driving time corresponding to the pixel point, and the second setting mode uses multiple subframe times as the driving time corresponding to the pixel point.

[0198] Furthermore, the processing module 92 is further configured to:

[0199] Using the first sub-frame time among the multiple sub-frame times as the driving time corresponding to the pixel point;

[0200] The selected driving voltage is used as the target driving voltage corresponding to the driving time.

[0201] Furthermore, the processing module 92 is further configured to:

[0202] Determining at least one intermediate gray scale according to a correspondence between the first gray scale, the second gray scale, the preset gray scale, and the driving voltage;

[0203] The number of the front intermediate gray scales in the plurality of sub-frame times plus one sub-frame time is used as the driving time corresponding to the pixel point;

[0204] Determine a starting grayscale and an ending grayscale corresponding to a driving time from the first grayscale, the second grayscale, and the at least one intermediate grayscale;

[0205] The target driving voltage corresponding to the driving time is determined according to the starting gray scale, the ending gray scale, and the corresponding relationship between the preset gray scale and the driving voltage.

[0206] Furthermore, the processing module 92 is further configured to:

[0207] Using the first grayscale as an initial grayscale;

[0208] Determining an intermediate gray scale according to the correspondence between the initial gray scale, the preset gray scale and the driving voltage;

[0209] According to the correspondence between the preset gray scale and the driving voltage, determining whether there is a corresponding first candidate voltage between the intermediate gray scale and the second gray scale;

[0210] If there is no corresponding first candidate voltage between the intermediate gray scale and the second gray scale, take the intermediate gray scale as the initial gray scale, and re-determine an intermediate gray scale based on the correspondence between the initial gray scale, the preset gray scale and the driving voltage, and re-judge whether there is a corresponding first candidate voltage between the newly determined intermediate gray scale and the second gray scale; if there is no corresponding first candidate voltage between the newly generated intermediate gray scale and the second gray scale, repeat this step until there is a corresponding first candidate voltage between the intermediate gray scale and the second gray scale.

[0211] Furthermore, the processing module 92 is further configured to:

[0212] Determining a second selected voltage corresponding to the initial gray scale according to the correspondence between the preset gray scale and the driving voltage;

[0213] The largest voltage among the second candidate voltages and the grayscale corresponding to the initial grayscale are used as the intermediate grayscale.

[0214] Furthermore, the processing module 92 is further configured to:

[0215] According to the number of driving times corresponding to the pixel points, determining the largest target driving time number among the number of driving times corresponding to the pixel points;

[0216] Determining whether the target driving time quantity is greater than 1;

[0217] If the target driving time is greater than 1, the third setting mode is adopted to determine the target black insertion time;

[0218] If the target driving time is equal to 1, the fourth setting mode is adopted to determine the target black insertion time;

[0219] The third setting mode uses a plurality of sub-frame times as the target black insertion time, and the fourth setting mode uses one sub-frame time as the target black insertion time.

[0220] Furthermore, the third setting mode is:

[0221] Among the multiple sub-frame times, the target driving time amount minus one sub-frame time is used as the target black insertion time;

[0222] The target driving time amount minus the sum of one subframe time is less than the original black insertion time.

[0223] Furthermore, the fourth setting mode is:

[0224] Using the first sub-frame time among the multiple sub-frame times as the target black insertion time;

[0225] The subframe time is shorter than the original black insertion time.

[0226] The black insertion display device provided in this embodiment is used to implement the technical solution in any of the above embodiments. Its implementation principle and technical effect are similar and will not be described in detail here.

[0227] An embodiment of the present application also provides a readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the technical solution provided in any of the aforementioned embodiments is implemented.

[0228] An embodiment of the present application also provides a computer program product, including a computer program, which is used to implement the technical solution provided by any of the aforementioned embodiments when executed by a processor.

[0229] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0230] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0231] For ease of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are intended to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A liquid crystal display device, characterized in that: The liquid crystal display device comprises: A processor, the processor being configured to: Obtaining a first grayscale of a pixel in a previous frame of the current frame, a second grayscale of a pixel in the current frame, and an original black insertion time; Dividing the refresh time corresponding to the current frame image into a plurality of sub-frame times; Determine the driving time corresponding to the pixel point and the target driving voltage corresponding to the driving time according to the corresponding relationship between the first gray scale, the second gray scale, the preset gray scale corresponding to the subframe time, and the driving voltage; Determine a target black insertion time according to the number of driving times corresponding to the pixel points; wherein the target black insertion time is less than the original black insertion time; A timing control board, wherein the timing control board is configured to: control the display panel in the liquid crystal display device to refresh within a subframe time, and apply the target driving voltage to the liquid crystal molecules corresponding to the pixel points within the driving time; A driving circuit is configured to turn off a backlight source in the liquid crystal display device within the target black insertion time.

2. The liquid crystal display device according to claim 1, characterized in that: When the processor is configured to determine the driving time corresponding to the pixel point and the target driving voltage corresponding to the driving time according to the corresponding relationship between the first gray scale, the second gray scale, the preset gray scale corresponding to the subframe time, and the driving voltage, the processor is specifically configured as follows: According to the correspondence between the preset gray scale and the driving voltage, determining whether there is a corresponding driving voltage to be selected between the first gray scale and the second gray scale; If there are corresponding drive voltages to be selected between the first grayscale and the second grayscale, a first setting mode is adopted to determine a drive time corresponding to the pixel point and a target drive voltage corresponding to the drive time; If there is no corresponding drive voltage to be selected between the first grayscale and the second grayscale, a second setting mode is adopted to determine the drive time corresponding to the pixel point and the target drive voltage corresponding to the drive time; The first setting mode uses one subframe time as the driving time corresponding to the pixel point, and the second setting mode uses multiple subframe times as the driving time corresponding to the pixel point.

3. The liquid crystal display device according to claim 2, characterized in that: When the processor is configured to adopt the first setting mode to determine the driving time corresponding to the pixel point and the target driving voltage corresponding to the driving time, the processor is specifically configured as follows: Using the first sub-frame time among the multiple sub-frame times as the driving time corresponding to the pixel point; The selected driving voltage is used as the target driving voltage corresponding to the driving time.

4. The liquid crystal display device according to claim 2, characterized in that: When the processor is configured to adopt the second setting mode to determine the driving time corresponding to the pixel point and the target driving voltage corresponding to the driving time, the processor is specifically configured as follows: Determining at least one intermediate gray scale according to a correspondence between the first gray scale, the second gray scale, the preset gray scale, and the driving voltage; The number of the front intermediate gray scales in the plurality of sub-frame times plus one sub-frame time is used as the driving time corresponding to the pixel point; Determine a starting grayscale and an ending grayscale corresponding to a driving time from the first grayscale, the second grayscale, and the at least one intermediate grayscale; The target driving voltage corresponding to the driving time is determined according to the starting gray scale, the ending gray scale, and the corresponding relationship between the preset gray scale and the driving voltage.

5. The liquid crystal display device according to claim 4, characterized in that: When the processor is configured to determine at least one intermediate grayscale according to the correspondence between the first grayscale, the second grayscale, the preset grayscale and the driving voltage, the processor is specifically configured as follows: Using the first grayscale as an initial grayscale; Determining an intermediate gray scale according to the correspondence between the initial gray scale, the preset gray scale and the driving voltage; According to the correspondence between the preset gray scale and the driving voltage, determining whether there is a corresponding first candidate voltage between the intermediate gray scale and the second gray scale; If there is no corresponding first candidate voltage between the intermediate gray scale and the second gray scale, take the intermediate gray scale as the initial gray scale, and re-determine an intermediate gray scale based on the correspondence between the initial gray scale, the preset gray scale and the driving voltage, and re-judge whether there is a corresponding first candidate voltage between the newly determined intermediate gray scale and the second gray scale; if there is no corresponding first candidate voltage between the newly generated intermediate gray scale and the second gray scale, repeat this step until there is a corresponding first candidate voltage between the intermediate gray scale and the second gray scale.

6. The liquid crystal display device according to claim 5, characterized in that: When the processor is configured to determine an intermediate gray scale according to the correspondence between the initial gray scale, the preset gray scale and the driving voltage, the processor is specifically configured as follows: Determining a second selected voltage corresponding to the initial gray scale according to the correspondence between the preset gray scale and the driving voltage; The largest voltage among the second candidate voltages and the grayscale corresponding to the initial grayscale are used as the intermediate grayscale.

7. The liquid crystal display device according to claim 1, characterized in that: When the processor is configured to determine the target black insertion time according to the number of driving times corresponding to the pixel points, the processor is specifically configured as follows: According to the number of driving times corresponding to the pixel points, determining the largest target driving time number among the number of driving times corresponding to the pixel points; Determining whether the target driving time quantity is greater than 1; If the target driving time is greater than 1, the third setting mode is adopted to determine the target black insertion time; If the target driving time is equal to 1, the fourth setting mode is adopted to determine the target black insertion time; The third setting mode uses a plurality of sub-frame times as the target black insertion time, and the fourth setting mode uses one sub-frame time as the target black insertion time.

8. The liquid crystal display device according to claim 7, characterized in that: The third setting mode is: Among the multiple sub-frame times, the target driving time amount minus one sub-frame time is used as the target black insertion time; The target driving time amount minus the sum of one subframe time is less than the original black insertion time.

9. The liquid crystal display device according to claim 7, characterized in that: The fourth setting mode is: Using the first sub-frame time among the multiple sub-frame times as the target black insertion time; The subframe time is shorter than the original black insertion time.

10. A black insertion display method, characterized in that: include: Obtaining a first grayscale of a pixel in a previous frame of the current frame, a second grayscale of a pixel in the current frame, and an original black insertion time; Divide the refresh time corresponding to the current frame image into a plurality of sub-frame times; wherein the sub-frame time is shorter than the original black insertion time; According to the correspondence between the preset grayscale corresponding to the subframe time and the driving voltage, if it is determined that the first grayscale and the second grayscale have corresponding to the selected driving voltage, the first subframe time among the multiple subframe times is used as the target black insertion time and the driving time corresponding to the pixel point; Using the selected driving voltage as the target driving voltage corresponding to the driving time; Controlling the display panel to refresh within the subframe time, and applying the target driving voltage to the liquid crystal molecules corresponding to the pixel points within the driving time; The backlight source is turned off within the target black insertion time.

Images