Black frame insertion processing method and display device

Abstract

The invention discloses a black frame insertion processing method and a display device, and the method comprises the steps: obtaining display video data, and recognizing an actual motion video of the display video data and an actual motion rate corresponding to the actual motion video; the actual motion video comprises multiple frames of motion images; according to a mapping relation between a preset motion rate and preset black insertion information, obtaining target black insertion information corresponding to the actual motion rate; and determining a target black insertion backlight partition corresponding to the moving image according to the target black insertion information, and performing black insertion processing on the target black insertion backlight partition. The problem of display flicker caused by full-backlight black insertion at present can be effectively relieved.

Description

Technical Field

[0001] The present application relates to the field of electronic technologies, and particularly to a black insertion processing method and a display device. Background Art

[0002] Due to the slow response time of liquid crystals, liquid crystal display devices are prone to trailing phenomena when displaying some high-speed moving pictures, which affects the viewing effect.

[0003] Currently, over-driving is adopted at the screen end to improve the response time and alleviate trailing. However, too much over-driving easily leads to inaccurate grayscale display. There is also a method of inserting black frames on the backlight, so that the backlight is not lit during the trailing time, thereby improving the trailing problem. The previous black insertion method mainly inserts black into the entire backlight. Since the backlight is inserted with black, that is, it is not lit for some time, the brightness will decrease. The full-backlight black insertion is affected by the driving power and cannot perform comprehensive brightness compensation to keep the brightness unchanged. Secondly, the previous method of inserting black frames, that is, inserting black for the entire frame time, is too long and easily leads to display flicker, affecting the viewing effect. Summary of the Invention

[0004] The present application provides a black insertion processing method and a display device, which can effectively alleviate the display flicker problem caused by current full-backlight black insertion.

[0005] The present application provides a black insertion processing method, which is applied to a display device. The display device includes a backlight source, and the backlight source includes a plurality of backlight partitions. The black insertion processing method includes:

[0006] Obtain display video data, and identify the actual moving video in the display video data and the actual moving speed corresponding to the actual moving video; the actual moving video includes multiple moving image frames;

[0007] According to the mapping relationship between the preset moving speed and the preset black insertion information, obtain the target black insertion information corresponding to the actual moving speed;

[0008] Determine the target black insertion backlight partition corresponding to the moving image frame according to the target black insertion information, and perform black insertion processing on the target black insertion backlight partition.

[0009] In the black insertion processing method in some embodiments, the display device further includes a display panel, the display panel includes a plurality of display partitions, the number of backlight partitions is not greater than the number of display partitions, and the target black insertion information includes the target black insertion display partition and the target black insertion time corresponding to the moving image frame;

[0010] The step of determining the target black insertion backlight partition corresponding to the moving image frame according to the target black insertion information and performing black insertion processing on the target black insertion backlight partition includes:

[0011] Determine the backlight partition where it is located according to the target black insertion display partition, and use the backlight partition where it is located as the target black insertion backlight partition;

[0012] Control the target black insertion backlight partition to turn off for the target black insertion time.

[0013] In the black insertion processing method in some embodiments, before the step of performing black insertion processing on the target black insertion backlight partition, it further includes:

[0014] Determine the target effective display duration of the moving image frame according to the target black insertion information;

[0015] Obtain the actual effective display duration and the actual driving current of the moving image frame according to the actual moving video;

[0016] Obtain the target driving current of the non-target black insertion backlight partition according to the target effective display duration, the actual effective display duration, and the actual driving current, so that the brightness of the moving image frame before and after black insertion is consistent.

[0017] In the black insertion processing method in some embodiments, the step of obtaining the target black insertion information corresponding to the actual moving speed according to the mapping relationship between the preset moving speed and the preset black insertion information includes:

[0018] Determine whether the actual moving speed is consistent with the preset moving speed in the mapping relationship;

[0019] If not, obtain two preset moving speeds close to the actual moving speed, and obtain the target black insertion information according to the preset moving speed.

[0020] In the black insertion processing method in some embodiments, after the step of determining whether the actual moving speed is consistent with the preset moving speed in the mapping relationship, it further includes:

[0021] When the actual moving speed is consistent with the preset moving speed in the mapping relationship, use the preset black insertion information corresponding to the preset moving speed as the target black insertion information.

[0022] In the black insertion processing method in some embodiments, the black insertion processing method further includes:

[0023] Pre-store the mapping relationship between the preset moving speed and the preset black insertion information.

[0024] An embodiment of the present application further provides a black insertion processing method, and the black insertion processing method includes:

[0025] Obtain a test moving video and set the test moving speed of the test moving video;

[0026] Obtain the first trailing duration of the test moving video at the test moving speed;

[0027] According to different test black insertion information, repeatedly perform black insertion processing on each frame of the moving image in the test moving video, and record the second trailing duration after each black insertion processing;

[0028] When the second trailing duration of the test moving video after black insertion processing decreases to the target time, use the test black insertion information of this black insertion processing as the preset black insertion information, and store the test moving speed as the preset moving speed corresponding to the preset black insertion information to form a mapping relationship.

[0029] In the black insertion processing method in some embodiments, the test black insertion information includes the test black insertion display area corresponding to the moving image and the test black insertion time; the test black insertion time is less than the first trailing duration.

[0030] In the black insertion processing method in some embodiments, the step of obtaining the first trailing duration of the test moving video at the test moving speed includes:

[0031] Record the trailing length of the test moving video at the test moving speed;

[0032] Calculate the first trailing duration according to the trailing length and the test moving speed.

[0033] The embodiment of the present application also provides a display device, which includes a main control chip and a backlight. The main control chip is connected to the backlight, and the main control chip is used to execute the above black insertion processing method.

[0034] A black insertion processing method and a display device provided by the present application. The black insertion processing method obtains corresponding target black insertion information according to the actual moving speed of the actual moving video, and performs local black insertion processing on each frame of the moving image in the actual moving video, which can effectively alleviate the display flicker problem caused by full-frame black insertion and optimize the display effect. Description of the Drawings

[0035] Combined with the following drawings, through a detailed description of the specific implementation manners of the present application, the technical solutions and other beneficial effects of the present application will be obvious.

[0036] Figure 1 It is a schematic flowchart of the first embodiment of the black insertion processing method provided by the embodiment of the present application.

[0037] Figure 2 It is a schematic flowchart of the second embodiment of the black insertion processing method provided by the embodiment of the present application.

[0038] Figure 3 It is a schematic flowchart of the third embodiment of the black insertion processing method provided by the embodiment of the present application.

[0039] Figure 4The waveform diagrams corresponding to the driving signals during non-black insertion and black insertion in the black insertion processing method provided by the embodiments of the present application.

[0040] Figure 5 The schematic flowchart of the fourth embodiment in the black insertion processing method provided by the embodiments of the present application.

[0041] Figure 6 The schematic flowchart of the fifth embodiment in the black insertion processing method provided by the embodiments of the present application.

[0042] Figure 7 The schematic flowchart of the sixth embodiment in the black insertion processing method provided by the embodiments of the present application.

[0043] Figure 8 The structural block diagram of the display device provided by the embodiments of the present application. Detailed implementation manners

[0044] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0045] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0046] Please refer to Figure 1 , this embodiment provides a black insertion processing method. The black insertion processing method is applied to a display device. The display device includes a backlight source and a display panel. The backlight source provides backlight for the display panel to realize the display of the picture of the display device. The backlight source includes a plurality of backlight zones, and each backlight zone is provided with a plurality of light-emitting devices. When backlight needs to be turned on, the corresponding light-emitting devices are controlled to be turned on, and vice versa, the light-emitting devices are controlled not to be turned on, so that the corresponding backlight zone is turned off.

[0047] The black insertion processing method in this embodiment includes:

[0048] 100. Obtain display video data, and identify the actual moving video in the display video data and the actual moving speed corresponding to the actual moving video; the actual moving video includes multiple frames of moving image pictures;

[0049] 200. Obtain the target black insertion information corresponding to the actual motion speed according to the mapping relationship between the preset motion speed and the preset black insertion information;

[0050] 300. Determine the target black insertion backlight partition corresponding to the motion image frame according to the target black insertion information, and perform black insertion processing on the target black insertion backlight partition.

[0051] When the display device obtains the display video data, it identifies the actual motion video in the display video data and the actual motion speed of the actual motion video. Each actual motion video includes multiple motion image frames, and the display device displays the actual motion video frame by frame. After obtaining the actual motion speed, according to the mapping relationship between the preset motion speed and the preset black insertion information stored in advance, obtain the target black insertion information corresponding to the actual motion speed in the mapping relationship. Then, when displaying the actual motion video, perform black insertion processing on each motion image frame according to the target black insertion information. Specifically, determine the target black insertion backlight partition that needs to be black inserted in each motion image frame according to the target black insertion information, so as to perform black insertion processing on the target black insertion backlight partition, thereby realizing the black insertion process of the motion image frame.

[0052] In this embodiment, the black insertion information is associated with the motion speed in the display video data, and local black insertion is performed on each motion image frame according to different motion speeds, which effectively improves the trailing phenomenon while alleviating the display flicker problem caused by full-frame black insertion.

[0053] Among them, the display device further includes a display panel. The display panel includes multiple display partitions. The number of backlight partitions is not greater than the number of display partitions. When the display partitions and the backlight partitions correspond one by one, one backlight partition provides backlight for one display partition. When the number of display partitions is greater than the number of backlight partitions, in order to provide backlight for the entire display panel, at this time, one backlight partition may correspond to multiple display partitions, and one backlight partition provides backlight for multiple display partitions. The target black insertion information includes the target black insertion display partition and the target black insertion time corresponding to the motion image frame. When the number of backlight partitions is less than the number of display partitions, the target black insertion display partition may span two backlight partitions, and the target black insertion display partition may also be within one backlight partition.

[0054] Please refer to Figure 2 , correspondingly, step 300 includes:

[0055] 310. Determine the backlight partition where the target black insertion display partition is located according to the target black insertion display partition, and use the backlight partition where it is located as the target black insertion backlight partition;

[0056] 320. Control the target black insertion backlight partition to be turned off for the target black insertion time.

[0057] Among them, the blanking time corresponds to the duration for which the backlight partition where the target blanking display partition is located needs to be blanked. Determine the backlight partition where it is located according to the target blanking display partition that needs to be blanked in each frame of the moving image, and use this backlight partition as the target blanking backlight partition, so as to control the off target blanking time of the target blanking backlight partition, and then achieve local blanking to alleviate the problem of display flicker.

[0058] Please refer to Figure 3 , in some embodiments, before performing blanking processing on the target blanking backlight partition, it further includes:

[0059] 11. Determine the target effective display duration of the moving image according to the target blanking information;

[0060] 12. Obtain the actual effective display duration and actual drive current of the moving image according to the actual moving video;

[0061] 13. Obtain the target drive current of the non-target blanking backlight partition according to the target effective display duration, actual effective display duration, and actual drive current, so that the brightness of the moving image before and after blanking is consistent.

[0062] As Figure 4 shown, Figure 4 is the waveform diagram of the drive signal in the backlight source when not blanked and when blanked. Denote the duration of a frame of the moving image as T1, and the blanking durations are T21, T22, and T23 respectively; the width W1 of the high level in the drive signal is the effective display duration, and the height H1 in the drive signal is the magnitude of the drive signal, such as the magnitude of the drive current. When performing blanking processing on a frame of the moving image, the total effective display duration of the moving image will be reduced. Therefore, in this embodiment, the target effective display duration of the moving image will be determined according to the target blanking information, and the actual effective display duration and actual drive current corresponding to the moving image when not blanked will be obtained according to the actual moving video. In order to ensure that the brightness of the moving image before and after blanking remains unchanged, it is necessary to increase the drive current of the non-target blanking backlight partition to compensate for the brightness loss. Thus, on the one hand, this application can alleviate the flicker problem of full-backlight blanking, and on the other hand, it can also alleviate the problem of brightness decline caused by blanking.

[0063] Please refer to Figure 5 , in some embodiments, step 200 includes:

[0064] 210. Determine whether the actual movement speed is consistent with the preset movement speed in the mapping relationship;

[0065] 220. If not, obtain two preset movement speeds close to the actual movement speed, and obtain the target blanking information according to the preset movement speed.

[0066] In practical applications, if the actual motion rate corresponding to the acquired actual motion video does not exist in the mapping relationship, then two preset motion rates close to the actual motion rate are searched for in the mapping relationship, and the target black insertion information corresponding to the actual motion rate is calculated by linear interpolation based on the two preset motion rates close to the actual motion rate. For example, if the preset motion rate of 1 m / s corresponds to a black insertion time of 1 ms and the preset motion rate of 3 m / s corresponds to a black insertion time of 3 ms, then the target black insertion time calculated by linear interpolation for the preset motion rate of 2 m / s is 2 ms.

[0067] In some embodiments, step 200 further includes:

[0068] 230. When the actual motion rate is the same as the preset motion rate in the mapping relationship, the preset black insertion information corresponding to the preset motion rate is used as the target black insertion information.

[0069] Of course, if a preset motion rate that is the same as the actual motion rate can be directly found in the mapping relationship, the preset black insertion information corresponding to the preset motion rate is used as the target black insertion information corresponding to the actual motion rate, so as to facilitate the subsequent black insertion processing and optimize the display effect.

[0070] In some embodiments, the black insertion processing method further includes: pre-storing the mapping relationship between the preset motion rate and the preset black insertion information. This mapping relationship can be stored in the form of a table to form a black insertion time table, or can be stored in the form of a curve graph to form a black insertion time graph, so that the black insertion information corresponding to different motion rates can be directly obtained according to the black insertion time table or the black insertion time graph in the subsequent process, so as to optimize the display effect.

[0071] Please refer to Figure 6 , this application embodiment also provides a black insertion processing method, which is used to obtain test data to store the mapping relationship between the preset motion rate and the preset black insertion information. Specifically, the black insertion processing method includes:

[0072] 110. Obtain a test motion video and set the test motion rate of the test motion video;

[0073] 120. Obtain the first trailing duration of the test motion video at the test motion rate;

[0074] 130. According to different test black insertion information, repeatedly perform black insertion processing on each frame of the motion image in the test motion video, and record the second trailing duration after each black insertion processing;

[0075] 140. When the second trailing time of the test motion video after black insertion processing is reduced to the target time, the test black insertion information of this black insertion processing is used as the preset black insertion information, and the test motion rate is stored as the preset motion rate corresponding to the preset black insertion information to form a mapping relationship.

[0076] In this embodiment, by testing test motion videos with different motion rates, the black insertion information adapted to different motion rates can be obtained. For example, obtain a test motion video, set the corresponding test motion rate, play the test motion video according to this motion rate, and thus obtain the first trailing time of this test motion video at this test motion rate. Then, set the test black insertion information, which includes the test black insertion display area and the test black insertion time corresponding to the moving image frame. The test black insertion time is less than the first trailing time, and the test black insertion display area can be the rear period, the middle period, or the last period of a frame of the moving image. Then, according to this test black insertion time and the test black insertion display area, the black insertion backlight area corresponding to the moving image frame is determined, and then the black insertion backlight area is controlled to turn off. At the same time, during the test, the second trailing time after each black insertion processing will be recorded, and the change of the second trailing time will be observed. If the second trailing time is reduced to the target time length, the trailing problem is alleviated. Then, the test black insertion information of this black insertion processing is used as the preset black insertion information, and the test motion rate of this time is used as the preset motion rate corresponding to the preset black insertion information to form a set of corresponding relationships. Then, change the test motion rate of the test motion video and repeat the above operations to obtain multiple sets of corresponding relationships, and then form a mapping relationship between the preset motion rate and the preset black insertion information.

[0077] Please refer to Figure 7 , in some embodiments, step 120 includes:

[0078] 121. Record the trailing length of the test motion video at the test motion rate;

[0079] 122. Calculate the first trailing time according to the trailing length and the test motion rate.

[0080] In this embodiment, the test motion video with the set test motion rate is played by the display device, the trailing length of the test motion video is captured by a high-speed camera, and the trailing time, that is, the first trailing time, is calculated by dividing the trailing length by the test motion rate.

[0081] Please refer to Figure 8, an embodiment of the present application further provides a display device, which includes a main control chip 10, a backlight module 20, and a display module 30. The backlight module 20 includes a backlight driving chip 21 and a backlight source 22. The display module 30 includes a display driving chip 31 and a display panel 32. The main control chip is used to execute the above-mentioned black insertion processing method. Since the above-mentioned black insertion processing method has been described in detail, it will not be elaborated here.

[0082] In the above embodiments, the descriptions of the respective embodiments have their own focuses. For parts not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0083] The above has introduced in detail the black insertion processing method provided by the embodiments of the present application. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present application; those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and 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.

Claims

1. A black insertion processing method, applied to a display device, wherein the display device comprises a backlight source, and the backlight source comprises a plurality of backlight partitions, characterized in that: The black insertion processing method comprises: Acquire display video data, and identify actual motion video of the display video data and an actual motion rate corresponding to the actual motion video; the actual motion video includes multiple frames of motion image pictures; According to a mapping relationship between a preset motion rate and preset black insertion information, obtaining target black insertion information corresponding to the actual motion rate; A target black insertion backlight partition corresponding to the motion image picture is determined according to the target black insertion information, and black insertion processing is performed on the target black insertion backlight partition.

2. The black insertion processing method according to claim 1, characterized in that: The display device further includes a display panel, the display panel includes a plurality of display partitions, the number of the backlight partitions is not greater than the number of the display partitions, and the target black insertion information includes a target black insertion display partition and a target black insertion time corresponding to the motion image picture; The step of determining the target black insertion backlight partition corresponding to the motion image according to the target black insertion information, and performing black insertion processing on the target black insertion backlight partition comprises: Determine the backlight partition where the target black insertion display partition is located according to the target black insertion display partition, and use the backlight partition where the target black insertion backlight partition is located as the target black insertion backlight partition; The target black insertion backlight partition is controlled to close the target black insertion time.

3. The black insertion processing method according to claim 2, characterized in that: Before the step of performing black insertion processing on the target black insertion backlight partition, the step further includes: Determining a target effective display time of the motion image according to the target black insertion information; According to the actual motion video, obtaining the actual effective display time and the actual driving current of the motion image picture; The target driving current of the non-target black insertion backlight partition is obtained according to the target effective display time, the actual effective display time and the actual driving current, so that the brightness of the motion image picture before and after the black insertion is consistent.

4. The black insertion processing method according to claim 3, characterized in that: The step of acquiring the target black insertion information corresponding to the actual motion rate according to the mapping relationship between the preset motion rate and the preset black insertion information comprises: Determining whether the actual motion rate is consistent with the preset motion rate in the mapping relationship; If not, two preset motion rates close to the actual motion rate are obtained, and the target black insertion information is obtained according to the preset motion rates.

5. The black insertion processing method according to claim 4, characterized in that: After the step of determining whether the actual motion rate is consistent with the preset motion rate in the mapping relationship, the following step further includes: When the actual motion rate is consistent with the preset motion rate in the mapping relationship, the preset black insertion information corresponding to the preset motion rate is used as the target black insertion information.

6. The black insertion processing method according to any one of claims 1 to 5, characterized in that: The black insertion processing method further includes: A mapping relationship between a preset motion rate and preset black insertion information is pre-stored.

7. A black insertion processing method, characterized in that: The black insertion processing method comprises: Acquire a test motion video, and set a test motion rate of the test motion video; Obtaining a first tail duration of the test motion video at the test motion rate; Repeating the black insertion process for each frame of the motion image in the test motion video according to different test black insertion information, and recording the second tailing time after each black insertion process; When the second tailing time of the test motion video after black insertion processing is reduced to the target time, the test black insertion information of this black insertion processing is used as the preset black insertion information, and the test motion rate is stored as the preset motion rate corresponding to the preset black insertion information to form a mapping relationship.

8. The black insertion processing method according to claim 7, characterized in that: The test black insertion information includes a test black insertion display partition and a test black insertion time corresponding to the motion image picture; and the test black insertion time is less than the first tailing time.

9. The black insertion processing method according to claim 7, characterized in that: The step of obtaining the first tail duration of the test motion video at the test motion rate comprises: Recording the tail length of the test motion video at the test motion rate; The first tail duration is calculated according to the tail length and the test motion rate.

10. A display device, characterized in that: The display device comprises a main control chip and a backlight source, wherein the main control chip is connected to the backlight source, and the main control chip is used to execute the black insertion processing method according to any one of claims 1 to 6.

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