Black frame insertion method and display system
By dynamically selecting the black insertion area and adjusting the black insertion ratio frequency in the display system, the problems of reduced brightness and increased power consumption in the prior art are solved, achieving a more efficient display effect and visual experience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-15
- Publication Date
- 2026-05-15
AI Technical Summary
Existing black insertion technology cannot adaptively adjust according to the characteristics of the displayed content, resulting in reduced overall brightness and increased system power consumption, and it cannot effectively reduce ghosting and flickering.
A black insertion method is provided, which obtains the display screen of dynamic content, selects a black insertion area that covers the dynamic content but is smaller than the screen area, and dynamically adjusts the black insertion ratio and frequency according to the refresh rate of the display data. Combined with screen and backlight black insertion technology, black insertion is performed only on dynamic areas, reducing the invalid black insertion in static areas.
It effectively reduces brightness drop, lowers system power consumption, improves display stability and clarity, reduces ghosting and flickering, and enhances the visual experience.
Smart Images
Figure CN122050323A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of display technology, and in particular to a black dot insertion method and display system. Background Technology
[0002] Because liquid crystal displays (LCDs) operate on a completely different principle than CRTs (Cathode Ray Tubes), they inherently suffer from "ghosting" when displaying dynamic images. Traditional solutions primarily improve ghosting by increasing the response time of the liquid crystal material, but this method only addresses the symptoms and cannot completely eliminate the visual persistence effect in the human eye. Black frame insertion technology emerged to address this issue. By simulating the pulsed emission mechanism of CRTs, black frames are inserted between two image frames, cutting off the visual persistence effect and thus significantly reducing ghosting.
[0003] However, the existing implementation methods have many limitations: inserting black frames will significantly reduce the overall brightness. In backlight black frame insertion, in order to keep the average brightness unchanged, the backlight brightness needs to be increased during non-black frame insertion periods, but this will increase the system power consumption. Most existing black frame insertion technologies use a fixed black frame insertion ratio, which cannot be adaptively adjusted according to the characteristics of the displayed content. Summary of the Invention
[0004] This application provides a black character insertion method and display system, which solves the problem that existing black character insertion techniques cannot adaptively adjust according to the characteristics of the displayed content.
[0005] To solve the above-mentioned technical problems, the first technical solution adopted in this application is: to provide a black dot insertion method, applied to a display system, the method comprising: To obtain the display screen containing dynamic content, select the black insertion area; the black insertion area should be smaller than the area of the display screen and cover the dynamic content. The black line insertion ratio is determined based on the refresh rate of the displayed data; Insert black blocks according to the insertion area and insertion ratio; The black line insertion ratio is determined based on the refresh rate of the displayed data, including: In response to the display system's screen refresh rate being lower than the refresh rate threshold, black frames are inserted every N frames, where N is an integer greater than 1. In response to the display screen's refresh rate being higher than or equal to the refresh rate threshold, a black line is inserted every other frame. The refresh rate threshold is 120Hz.
[0006] In one embodiment, the display system displays the image on the screen using progressive scan, and the method of inserting black bars according to the black bar insertion area and ratio is called screen black bar insertion, specifically including: Along the column direction, the display screen is divided into a first scan area and a second scan area; each row of the first scan area contains static content, while each row of the second scan area contains dynamic content. The first scan area is scanned line by line at a first speed; the first speed is higher than the scanning speed of the normal display screen. The second scan area is scanned line by line at the second speed; the second speed is the scanning speed of the normally displayed screen.
[0007] In one embodiment, screen insertion is performed every N frames, specifically including: The first to Nth frames are displayed sequentially, and each frame displays the updated data change area relative to the previous frame, while the unchanged areas are not updated. The (N+1)th frame is a black-insertion frame, and the black-insertion area is the sum of the changed areas of the previous N frames.
[0008] In one embodiment, screen insertion is performed by inserting black characters every other frame, specifically including: The first frame displays correctly. The second frame inserts black characters into the dynamic areas that are normally displayed in the first frame; The third frame maintains the black insertion area of the second frame and displays it normally; in response to the overlap between the normally displayed dynamic area of the third frame and the black insertion area of the second frame, the dynamic area content is displayed normally in the overlapping area. The fourth frame only inserts black characters into the dynamic areas that are normally displayed in the third frame.
[0009] In one embodiment, the rotation is performed in a cycle of four frames; After the fourth frame is inserted into black, the fifth frame updates all areas.
[0010] In one embodiment, the display screen of the display system displays the image in progressive scan mode, and the backlight module of the display system has multiple independently controlled sub-backlight areas; the black insertion method based on the black insertion area and black insertion ratio is called backlight black insertion, specifically including: Along the column direction, the display screen is divided into a first scan area and a second scan area; each row of the first scan area contains static content, while each row of the second scan area contains dynamic content. Determine the minimum number of sub-backlight zones that the backlight module covers for dynamic content, as the black insertion area; The first and second scan areas are scanned line by line at a first speed; wherein the first speed is higher than the scanning speed of the normal display screen; Turn off the sub-backlight area of the black bar area.
[0011] In one embodiment, the display screen of the display system displays the image in progressive scan mode, and the backlight module of the display system has multiple independently controlled sub-backlight areas; the black insertion method based on the black insertion area and black insertion ratio is called backlight black insertion, specifically including: Along the column direction, the display screen is divided into a first scan area and a second scan area; each row of the first scan area contains static content, while each row of the second scan area contains dynamic content. Determine the black insertion area; the black insertion area covers the second scan area and consists of the minimum number of sub-backlight areas; The area outside the black-indented area is scanned line by line at a first speed; wherein the first speed is lower than the scanning speed of the normal display screen; Turn off the sub-backlight area of the black bar area.
[0012] In one embodiment, inserting black dots according to the insertion area and insertion ratio further includes: The black area is not scanned.
[0013] To solve the above-mentioned technical problems, the second technical solution adopted in this application is: to provide a display system, including a display screen and a black dot insertion control circuit, wherein the black dot insertion control circuit is used to execute the black dot insertion method of any of the above embodiments.
[0014] The beneficial effects of this application are as follows: Unlike existing technologies, this application provides a black-insertion method and display system. The black-insertion method is applied to the display system and includes: acquiring a display screen containing dynamic content; selecting a black-insertion area; ensuring the black-insertion area is smaller than the area of the display screen and covers the dynamic content; determining the black-insertion ratio based on the refresh rate of the display data; and performing black-insertion based on the black-insertion area and ratio. This application reduces invalid black-insertion in static areas by only covering the dynamic content, thereby reducing the degree of brightness degradation. Dynamically adjusting the black-insertion ratio according to the refresh rate increases the black-insertion frequency without introducing flicker in scenarios where the refresh rate is higher than a preset refresh rate threshold, thus improving display stability. Combining dynamic area selection and ratio adjustment further improves the clarity of displayed dynamic content, enhancing the visual experience. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 A flowchart illustrating the first embodiment of the black dot insertion method provided in this application; Figure 2 For this application Figure 1 A schematic diagram of the framework of an embodiment prior to the implementation of step S10; Figure 3 For this application Figure 1 A schematic diagram of the framework of one embodiment of step S30; Figure 4 A schematic diagram of the framework of an embodiment of the black insertion method provided in this application; Figure 5 A timing diagram of an embodiment of the black insertion method provided in this application; Figure 6 For this application Figure 1 A schematic diagram of the framework of the first embodiment of step S20; Figure 7 For this application Figure 1 A schematic diagram of the framework of the second embodiment of step S20; Figure 8 A flowchart illustrating a second embodiment of the black dot insertion method provided in this application; Figure 9 A flowchart illustrating the third embodiment of the black dot insertion method provided in this application; Figure 10 A schematic diagram of the framework of an embodiment of the display system provided in this application.
[0017] Reference numerals: Data module 01, Logic module 02, Display module 03, Display system 100, Display screen 101, Black bar insertion control circuit 102, Sub-backlight area 103, First scanning area 1011, Second scanning area 1012, Dynamic area 1013, Black bar insertion area 1014, Data line D, Gate line G. Detailed Implementation
[0018] The embodiments of this application will now be described in detail with reference to the accompanying drawings.
[0019] In the following description, specific details such as particular system architectures, interfaces, and technologies are presented for illustrative purposes rather than for limiting purposes, in order to provide a thorough understanding of this application.
[0020] In this article, the term "and / or" simply describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / " generally indicates that the preceding and following related objects have an "or" relationship. Furthermore, "more" in this article means two or more objects.
[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.
[0022] Before providing a further detailed description of the embodiments of this application, the nouns and terms involved in the embodiments of this application will be explained, and the nouns and terms involved in the embodiments of this application shall be interpreted as follows.
[0023] like Figure 1 As shown, Figure 1 This is a flowchart illustrating a first embodiment of the black dot insertion method provided in this application. In one embodiment, this application provides a black dot insertion method applied to a display system 100, which specifically includes the following steps: Step S10: Obtain the display screen containing dynamic content and select the black area; the black area is smaller than the area of the display screen and covers the dynamic content.
[0024] Step S20: Determine the black line insertion ratio based on the refresh rate of the displayed data.
[0025] Step S30: Insert black bars according to the insertion area and insertion ratio.
[0026] Combination Figure 2 In one embodiment, a data module 01 stores the content of the display data, including the data of the current frame and subsequent frames. A logic module 02 reads out the data from the multiple frames to analyze the display content of the data module 01. The logic module 02 needs to determine the data of the multiple frames, including the dynamic minimum area and static area under the data of the multiple frames, so as to select the black insertion area. And according to the refresh rate of the data and the minimum number of changing frames, it determines the black insertion ratio, and then gives the modified data to the display module 03 or the backlight control module (not shown). For example, the display module 03 can be a Tcon (Timing Controller) circuit, and the display screen 101 is controlled by the display module 03.
[0027] It should be noted that in step S10, the logic module 02 obtains the display screen containing dynamic content from the data module 01. Dynamic content refers to content that moves or rotates between adjacent frames, such as fast-moving game footage or running animals. It can be understood that the pixel values in the dynamic content of adjacent display frames will change. The black insertion area 1014 is defined as covering the dynamic content area and being smaller than the entire display screen area, ensuring that black insertion is performed on the dynamic area 1013 while avoiding black insertion on static areas. For example, when the dynamic area 1013 is an ellipse, the black insertion area 1014 can be a rectangle, square, triangle, or other shapes that cover the ellipse area and are smaller than the display area.
[0028] The refresh rate of the display data in step S20 refers to the number of times the screen fully renders the image per second, which can determine the smoothness and stability of the screen.
[0029] In one embodiment, a refresh rate threshold can be preset, and the black insertion ratio is determined by judging the relationship between the refresh rate of the displayed data and the refresh rate threshold. For example, the preset refresh rate threshold can be 120Hz or 130Hz. It can be understood that the black insertion ratio is the frequency of black insertion frames during the display process. For example, during the display process, black insertion occurs every N frames, where N is an integer greater than or equal to 1.
[0030] In one embodiment, the display module 03 receives the black insertion area 1014 and the black insertion ratio uploaded by the logic module 02 and performs black insertion. Specifically, screen black insertion or backlight black insertion can be selected to perform local black insertion on the dynamic area. For example, if screen black insertion is selected, a black image can be inserted into the corresponding local area of the dynamic area; if backlight black insertion is selected, the backlight of the corresponding dynamic area can be selectively turned off according to the range of the obtained dynamic area to perform black insertion.
[0031] This embodiment alleviates the brightness reduction problem by inserting black bars only into the dynamic content area, thereby avoiding the aggravation of brightness loss in bright environments; the black bar insertion ratio is adaptively adjusted according to the refresh rate of the display data, thereby reducing flickering; selectively inserting black bars into the dynamic area 1013 instead of the entire screen saves power consumption, thereby improving the energy efficiency of the display system 100.
[0032] like Figure 3 As shown, Figure 3 For this application Figure 1A schematic diagram of the structure of one embodiment of step S30. In one embodiment, the display screen 101 of the display system 100 displays the image in a line-by-line scanning manner, and the black insertion method according to the black insertion area 1014 and the black insertion ratio is screen black insertion, specifically including: dividing the display screen into a first scanning area 1011 and a second scanning area 1012 along the column direction; each row of the first scanning area 1011 contains static content, and each row of the second scanning area 1012 contains dynamic content; the first scanning area 1011 is scanned line-by-line at a first speed; the first speed is higher than the scanning speed of the normal display screen; the second scanning area 1012 is scanned line-by-line at a second speed; the second speed is the scanning speed of the normal display screen.
[0033] It should be noted that in this embodiment, both the first scanning area 1011 and the second scanning area 1012 extend from one side of the display screen along the row direction. Static content refers to content that does not change in two adjacent frames. For example, if the display screen shows an animal running in a forest, it could be a rabbit or a deer; the static content in this scene is the trees in the forest. It can be understood that the pixel values in static content do not change over time. Each row of the second scanning area 1012 includes dynamic content; that is, the dynamic area 1013, which includes dynamic content, is located within the second scanning area 1012.
[0034] Combination Figure 4 and Figure 5 In one embodiment, the sub-pixel corresponding to the dynamic content acquired during the display panel display, i.e., the dynamic region 1013 that needs to be updated for the sub-pixel, is... Figure 4 The area enclosed by the dashed line indicates that pixels in other areas do not need to be updated. Due to the GOA (Gate Driver On Array) configuration in the display panel, gate signals need to be activated row by row. Therefore, rows that do not need updating cannot be skipped. Figure 5 Timing diagram and Figure 4 The scanning time for each row of sub-pixels corresponds one-to-one. The (N-1)th and Nth row sub-pixels are located in the first scanning area 1011, and the (N+1)th row sub-pixels are located in the second scanning area 1012. During display, the system scans the first scanning area 1011 (i.e., the (N-1)th and Nth row sub-pixels) line by line at a speed higher than normal, with a corresponding scanning time of t1, thus reducing the brightness change rate. The second scanning area 1012 (i.e., the (N+1)th row sub-pixels) is scanned line by line at the normal speed, with a corresponding scanning time of t2, enabling black insertion of dynamic content. Here, t1 is less than t2, meaning the charging time for the (N-1)th and Nth row sub-pixels is shorter than the charging time for the (N+1)th row sub-pixels.
[0035] In this embodiment, Figure 4 It also includes a data line D and a gate line G. The data line D is used to transmit the display data voltage of the pixel and determines the brightness of the selected pixel. The gate line G is used to control the selection timing of the pixel switch and determines whether a row of pixels is activated to receive the display data voltage.
[0036] In one embodiment, the first speed is the fastest scanning speed of the display panel, which means that the time t1 for opening each line is the shortest. The first speed can be simulated when designing the display panel in this embodiment. The second scanning speed, which is the scanning speed of the normal display screen, refers to the speed at which the gate driving circuit opens the pixel rows one by one when the display screen 101 is displaying a normal image frame, that is, the number of pixel rows that are scanned per unit time.
[0037] This embodiment divides the display screen along the column direction into a first scanning area 1011 and a second scanning area 1012, making the scanning speed of static content rows higher than the normal speed, thus saving power consumption. Scanning the first scanning area 1011 line by line at a first speed reduces brightness fluctuations, which helps to reduce flickering in display panels with refresh rates lower than the refresh rate threshold. Scanning the second scanning area 1012 line by line at a second speed enables black insertion in dynamic areas.
[0038] In one embodiment, determining the black insertion ratio based on the refresh rate of the displayed data includes: inserting black once every N frames in response to the refresh rate of the display screen 101 of the display system 100 being lower than a refresh rate threshold, where N is an integer greater than 1; and inserting black once every frame in response to the refresh rate of the display screen 101 being higher than or equal to the refresh rate threshold, where the refresh rate threshold is 120Hz.
[0039] It should be noted that the refresh rate threshold can be 100-130Hz. In this embodiment, the preset refresh rate threshold is 120Hz, which is used to distinguish different refresh rates of the display screen 101.
[0040] In one embodiment, when the refresh rate of the display screen 101 is lower than 120Hz, the system reduces the black frame insertion frequency by setting N to be greater than 1. For example, N can be 2, meaning black frame insertion occurs every two frames; N can also be 3, meaning black frame insertion occurs every three frames. In this way, flickering in display panels with refresh rates lower than the refresh rate threshold can be reduced.
[0041] In another embodiment, when the refresh rate is not lower than 120Hz, the system uses a black frame insertion method every other frame to maintain the black frame insertion effect by utilizing the short frame interval characteristic of the high frame rate. For example, at a refresh rate of 144Hz, the system can automatically switch to the black frame insertion mode every other frame. The black frame insertion minimizes the impact of the black frame insertion operation on the effective refresh rate of the display system, thereby significantly reducing motion blur in dynamic images.
[0042] In one embodiment, the method of inserting black every N frames is called screen black insertion, which specifically includes displaying the first frame to the Nth frame in sequence, and each frame displays the updated data change area relative to the previous frame, while keeping the unchanged area unchanged; the N+1th frame is the black insertion frame, and the black insertion area 1014 is the collection of the changed areas of the previous N frames.
[0043] It should be noted that the data change area refers to the pixel area that is different from the data displayed in the previous frame, the unchanged area refers to the pixel area with the same data, and the black insertion area 1014 refers to the union of all the change areas in the previous N frames.
[0044] Combination Figure 6 This embodiment uses N=3 as an example, which is a screen insertion method that inserts black text every three frames. The dynamic region 1013 shown in the first frame represents the data change area relative to the previous frame; the dynamic region 1013 shown in the second frame represents the data change area relative to the first frame; and the dynamic region 1013 shown in the third frame represents the data change area relative to the second frame. In the first three frames, all areas except the dynamic region 1013 are areas where data is not updated. The (N+1)th frame, i.e., the fourth frame, is the insertion frame, and its insertion region 1014 is the sum of the change areas from the previous three frames. Figure 4 The black area corresponding to the fourth frame.
[0045] This embodiment further reduces system power consumption by updating only the data change areas, which helps avoid brightness degradation. By using the black insertion area 1014 as a collection of the data change areas from the previous N frames, dynamic ghosting is reduced more effectively, which helps improve display quality.
[0046] In one embodiment, the method of inserting black text every other frame is called screen black text insertion, which specifically includes: the first frame is displayed normally; the second frame inserts black text into the dynamic area 1013 that is displayed normally in the first frame; the third frame maintains the black text insertion area 1014 of the second frame and displays normally; in response to the overlap between the dynamic area 1013 that is displayed normally in the third frame and the black text insertion area 1014 of the second frame, the content of the dynamic area 1013 is displayed normally in the overlapping area; the fourth frame inserts black text only into the dynamic area 1013 that is displayed normally in the third frame.
[0047] Combination Figure 7In one embodiment, the first frame displays the complete content of the current screen, and the dynamic area 1013 contains the corresponding dynamic content; the second frame only performs black insertion operation on the dynamic area 1013 of the first frame to avoid unnecessary black frame processing on areas other than the dynamic area 1013; the third frame maintains the range of the black insertion area 1014 of the second frame, while displaying the screen normally in the non-black insertion area 1014 to ensure screen continuity; when the dynamic area 1013 of the third frame overlaps with the black insertion area 1014 of the second frame, the dynamic content is restored to be displayed in the overlapping area to prevent brightness loss; the fourth frame only performs black insertion on the dynamic area 1013 of the third frame to achieve dynamic updating of the black insertion area 1014. It can be understood that, for example, the displayed content can be a game scene, the first frame displays the complete game screen, the second frame performs black insertion on the moving character area, the third frame displays the character area normally, and the fourth frame performs black insertion on the newly changed background area; for example, the displayed content can be a playing video, the dynamic area 1013 is a fast-moving object, black insertion is only applied to the object area, and the static background remains unchanged.
[0048] In one embodiment, in scenarios with less dynamic content, the dynamic area 1013 of the third frame almost overlaps with the black insertion area 1014 of the second frame, and the overlapping area directly displays the content, reducing the black insertion operation time.
[0049] This embodiment shortens the black insertion operation time by performing black insertion only on the dynamic area 1013, thereby reducing brightness loss and power consumption. Responding to the normal display of dynamic content in overlapping areas, unnecessary black insertion is avoided in dynamically changing areas, further improving display brightness. The fourth frame performs black insertion on the dynamic area 1013 of the third frame, synchronizing the black insertion operation with changes in displayed content, thus optimizing the black insertion frequency and reducing ghosting.
[0050] In one embodiment, the rotation is performed in a cycle of four frames; after the fourth frame is inserted, the fifth frame updates all regions.
[0051] In one embodiment, a four-frame cycle is defined for black insertion and display. This cycle includes a first frame for normal display, a second frame for black insertion into the dynamic region 1013 of the first frame, a third frame for maintaining the black insertion region 1014 and displaying normally, and a fourth frame for black insertion into the dynamic region 1013 of the third frame. During operation, after black insertion in the fourth frame, the fifth frame serves as the starting point for a new cycle, performing a complete data update on all display areas to ensure the continuity and accuracy of the dynamic region 1013 analysis, prevent deviations in dynamic content analysis, and maintain stable display content.
[0052] This embodiment uses a four-frame cycle to match the black insertion frequency with the display characteristics of display panels with refresh rates higher than a preset threshold, thereby reducing flickering. After the fourth frame's black insertion, the fifth frame updates all areas, causing the dynamic area 1013 analysis points to be periodically reset, avoiding accumulated errors and improving the consistency of displayed content.
[0053] Combination Figure 8 In one embodiment, the display screen 101 of the display system 100 displays the image in a progressive scan manner. The backlight area of the backlight module of the display system 100 has multiple independently controlled sub-backlight areas 103. The method of inserting black bars according to the black bar insertion area 1014 and the black bar insertion ratio is backlight black bar insertion, which specifically includes: dividing the display image into a first scanning area 1011 and a second scanning area 1012 along the column direction; each row of the first scanning area 1011 contains static content, and each row of the second scanning area 1012 contains dynamic content; determining the minimum number of sub-backlight areas 103 of the backlight module that cover the dynamic content as the black bar insertion area 1014; scanning the first scanning area 1011 and the second scanning area 1012 line by line at a first speed; wherein the first speed is higher than the scanning speed of the normal display image; and turning off the sub-backlight areas 103 of the black bar insertion area 1014.
[0054] It is understandable that in the process of turning off the sub-backlight area 103 of the black insertion area 1014, other sub-backlight areas 103 are kept to emit light normally.
[0055] In one embodiment, a minimum number of sub-backlight areas 103 covering the dynamic content of the backlight module are determined as black insertion areas 1014. Specifically, for example... Figure 8 The dynamic area 1013 is an elliptical area filled with gray, while the black insertion area 1014 is composed of four sub-backlight areas 103. It can be understood that the area of the black insertion area 1014 can be larger than the area of the dynamic area 1013, thereby ensuring the black insertion of the dynamic area.
[0056] In other embodiments, the shape of the dynamic area 1013 and the shape of the black insertion area 1014 are not limited, as long as the minimum number of sub-backlight areas 103 covering the dynamic content of the backlight module is satisfied as the black insertion area 1014. Due to the use of backlight black insertion, the second scanning area 1012 can also be scanned at the same first speed as the first scanning area 1011, maintaining the normal display of the static area of the second scanning area 1012, which not only improves brightness but also reduces energy consumption.
[0057] This embodiment alleviates the brightness reduction problem by only turning off a minimum number of sub-backlight areas 103 corresponding to dynamic content, thereby avoiding further brightness loss in bright environments. Energy consumption is reduced by scanning line by line at a speed higher than that of a normal display screen.
[0058] Combination Figure 9 In one embodiment, the display screen 101 of the display system 100 displays the image in a progressive scan manner, and the backlight area of the backlight module of the display system 100 has multiple independently controlled sub-backlight areas 103; the black insertion method according to the black insertion area 1014 and the black insertion ratio is backlight black insertion, which specifically includes: dividing the display screen into a first scanning area 1011 and a second scanning area 1012 along the column direction; each row of the first scanning area 1011 is static content, and each row of the second scanning area 1012 includes dynamic content; determining the black insertion area 1014; the black insertion area 1014 covers the second scanning area 1012 and is composed of a minimum number of sub-backlight areas 103; scanning the area outside the black insertion area 1014 line by line at a first speed; wherein, the first speed is lower than the scanning speed of the normal display screen; turning off the sub-backlight areas 103 of the black insertion area 1014.
[0059] like Figure 9 As shown, this embodiment... Figure 9 (a) The entire second scan area 1012 containing the dynamic content is backlit and black-filled, which reduces the overall display brightness of the display screen 101. Based on this, it is possible to... Figure 9 (b) The brightness of the first scan area 1011 above and below the black insertion area 1014 is increased, thereby achieving brightness compensation for the black insertion area 1014, improving the overall display brightness of the display screen 101, and resulting in a better display effect. Alternatively, it can also be done in Figure 9 (a) Increasing the brightness of the second scanning area 1012 in the display screen, for example, increasing the backlight brightness corresponding to the black insertion area 1014, improves the overall display brightness of the display screen 101 and has better brightness uniformity.
[0060] Furthermore, a proportional threshold is set to determine whether to enable it. Figure 9 The backlight black insertion method. This ratio threshold can be defined as the proportion of the dynamic region 1013 in the second scanning region 1012; for example, the ratio threshold can be 50%. When the proportion of the dynamic region 1013 in the second scanning region 1012 is greater than 50%, such as... Figure 9 (b) The black insertion area 1014 is the entire second scanning area 1012; when the proportion of the dynamic area 1013 in the second scanning area 1012 is less than 50%, preferably, the following is adopted. Figure 8 The black insertion method, the black insertion area 1014 can be only for... Figure 8The region is composed of four sub-backlight areas 103 covering the elliptical dynamic region 1013. It can be understood that the proportion of the dynamic region 1013 in the second scanning region 1012 is the proportion of the total area of all dynamic regions 1013 in the second scanning region 1012. Since the sub-backlight areas 103 are usually regular rectangles, calculating the minimum number of sub-backlight areas 103 covering the dynamic content of the backlight module becomes complex when the number of dynamic regions 1013 in the second scanning region 1012 is large or their shapes are irregular. Therefore, when the proportion of the dynamic region 1013 in the second scanning region 1012 exceeds a certain threshold, inserting the entire second scanning region 1012 into black can reduce the computational load and improve the insertion efficiency. It can be understood that this threshold can also be replaced by a threshold for the number of dynamic regions 1013 in the second scanning region 1012; that is, when the number of dynamic regions 1013 in the second scanning region 1012 is too large, inserting the entire second scanning region 1012 into black can reduce the computational load and improve the insertion efficiency. For example, when the second scanning area 1012 displays blooming fireworks, which have a large number of flashing points, inserting the entire second scanning area 1012 into black can reduce the amount of calculation and improve the efficiency of black insertion.
[0061] In this embodiment, the proportion of the dynamic region 1013 in the second scanning region 1012 is defined as a ratio threshold of 50%. In other embodiments, the specific value of the ratio threshold is not limited, and it can be, for example, 60%, 70% or 80%.
[0062] In one embodiment, the number of sub-backlight areas 103 can be dynamically adjusted to adapt to the dynamic range of different display content.
[0063] This embodiment divides the display screen into static and dynamic scanning areas, ensuring that the static content area maintains high brightness, thus avoiding brightness degradation in bright environments. The black insertion area 1014 consists of a minimum number of sub-backlight areas 103, making backlight control simpler and more efficient, thereby reducing system complexity and power consumption. Scanning areas outside the black insertion area 1014 at a first speed ensures stable static content display, reducing flicker. Turning off the sub-backlight areas 103 of the black insertion area 1014 allows for precise black insertion in the dynamic content area, further improving energy efficiency and reducing motion blur.
[0064] In one embodiment, inserting black bars according to the insertion area 1014 and the insertion ratio further includes: not scanning the insertion area 1014.
[0065] Since the black insertion area 1014 covers the second scan area 1012, that is, it spans horizontally, its pixel value does not need to be updated in the black insertion frame. The GOA system only needs to maintain the original data state. The GOA system processes the black insertion area 1014 with the minimum opening time and sends the instruction to keep the data, avoiding additional scanning operations.
[0066] In one embodiment, the size of the black insertion area 1014 can be dynamically adjusted to adapt to the dynamic range of changes in the displayed content, ensuring that the scanning operation is performed only on the necessary parts.
[0067] In this embodiment, the black insertion area 1014 is not scanned, which shortens the black insertion frame time, thereby reducing flickering and further improving the effective refresh rate, which is beneficial to reducing system power consumption.
[0068] like Figure 10 As shown, in one embodiment, this application provides a display system 100, including a display screen 101 and a black dot insertion control circuit 102, which is used to execute the black dot insertion method described in any of the above embodiments.
[0069] In one embodiment, the black insertion control circuit 102 further includes a data module 01, a logic module 02, and a display module 03. The data module 01 stores the content of display data; the logic module 02 acquires the content of the display data stored in the data module 01, analyzes and determines the area requiring black insertion, further calculates the final black insertion ratio based on the refresh rate of the display data, and finally transmits the black insertion area and black insertion ratio to the display module 03 or a backlight control module (not shown); the display module 03 performs black insertion on the display panel according to the black insertion area and black insertion ratio uploaded by the logic module 02. Based on this, the black insertion control circuit 102 executes the black insertion method in any of the above embodiments.
[0070] It should be noted that the display screen 101 is used to display image content, and the black frame insertion control circuit 102 is connected to the display screen 101 to control the black frame insertion operation. The black frame insertion control circuit 102 determines the dynamic area 1013 by analyzing multi-frame display data, and selectively inserts black frames in the dynamic area 1013 according to the ambient lighting conditions and the characteristics of the display content, avoiding black frame insertion in the static area.
[0071] The display system 100 provided in this embodiment dynamically selects the black insertion area 1014, so that the black insertion operation is only performed on the area where the content changes, thereby reducing brightness loss; by adaptively adjusting the black insertion ratio according to the ambient lighting conditions, the problem of brightness reduction is avoided in bright environments; by using different black insertion frequencies for different refresh rates, the flicker phenomenon is significantly reduced; thereby achieving improved display quality and optimized energy efficiency.
[0072] In some embodiments, the functions or modules of the apparatus provided in this disclosure can be used to perform the methods described in the above method embodiments. The specific implementation can be referred to the description of the above method embodiments, and for the sake of brevity, it will not be repeated here.
[0073] The description of the various embodiments above tends to emphasize the differences between the various embodiments. The similarities or similarities between them can be referred to, and for the sake of brevity, they will not be repeated here.
[0074] The above are merely embodiments of this application and do not limit the scope of patent protection of this application. Any equivalent structural or procedural changes made using the content of this application’s specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.
Claims
1. A black dot insertion method, applied to a display system, characterized in that, include: To capture the display screen containing dynamic content, select the black area. The black area is smaller than the area of the displayed screen and covers the dynamic content; The black line insertion ratio is determined based on the refresh rate of the displayed data; Insert black blocks according to the black block insertion area and the black block insertion ratio; The process of determining the black insertion ratio based on the refresh rate of the displayed data includes: In response to the refresh rate of the display screen of the display system being lower than the refresh rate threshold, black frames are inserted every N frames, where N is an integer greater than 1; In response to the refresh rate of the display screen being higher than or equal to the refresh rate threshold, a black line is inserted every other frame; The refresh rate threshold is 120Hz.
2. The black insertion method according to claim 1, characterized in that, The display system displays images in a progressive scan manner, and the black insertion method based on the black insertion area and the black insertion ratio is screen black insertion, specifically including: The display screen is divided into a first scanning area and a second scanning area along the column direction; each row of the first scanning area contains static content, and each row of the second scanning area contains dynamic content. The first scanning area is scanned line by line at a first speed; the first speed is higher than the scanning speed of the normal display screen; The second scanning area is scanned line by line at a second speed; the second speed is the scanning speed of the normally displayed screen.
3. The black insertion method according to claim 1, characterized in that, The method of inserting black frames every N frames is called screen black insertion, which specifically includes: The first to Nth frames are displayed sequentially, and each frame displays the updated data change area relative to the previous frame, while the unchanged areas are not updated. The (N+1)th frame is a black-insertion frame, and the black-insertion area is the set of the changed areas of the previous N frames.
4. The black insertion method according to claim 1, characterized in that, The method of inserting black bars every other frame is called screen black bar insertion, which specifically includes: The first frame displays correctly. The second frame inserts black characters into the dynamic areas that are normally displayed in the first frame; The third frame maintains the black insertion area of the second frame and displays normally; in response to the dynamic area of the normally displayed third frame overlapping with the black insertion area of the second frame, the dynamic area content is displayed normally in the overlapping area. The fourth frame only inserts black bars in the dynamic areas that are normally displayed in the third frame.
5. The black insertion method according to claim 4, characterized in that, It rotates in a cycle of four frames. After the fourth frame is inserted, the fifth frame updates all regions.
6. The black insertion method according to claim 1, characterized in that, The display screen of the display system displays images in a progressive scan manner, and the backlight module of the display system has multiple independently controlled sub-backlight areas. The method of inserting black bars according to the black bar insertion area and the black bar insertion ratio is called backlight black bar insertion, which specifically includes: The display screen is divided into a first scanning area and a second scanning area along the column direction; each row of the first scanning area contains static content, and each row of the second scanning area contains dynamic content. The minimum number of sub-backlight areas that cover the dynamic content in the backlight module are determined as the black insertion area; The first scanning area and the second scanning area are scanned line by line at a first speed; wherein the first speed is higher than the scanning speed of the normal display screen; The sub-backlight area that is closed in the black insertion area.
7. The black insertion method according to claim 1, characterized in that, The display screen of the display system displays images in a progressive scan manner, and the backlight module of the display system has multiple independently controlled sub-backlight areas. The method of inserting black bars according to the black bar insertion area and the black bar insertion ratio is called backlight black bar insertion, which specifically includes: The display screen is divided into a first scanning area and a second scanning area along the column direction; each row of the first scanning area contains static content, and each row of the second scanning area contains dynamic content. The black insertion area is determined; the black insertion area covers the second scanning area and is composed of the minimum number of the sub-backlight areas; The area outside the black-inserted area is scanned line by line at a first speed; wherein the first speed is lower than the scanning speed of the normal display screen; The sub-backlight area that is closed in the black insertion area.
8. The black insertion method according to claim 7, characterized in that, Inserting black bars according to the insertion area and the insertion ratio also includes: The black-inserted area is not scanned.
9. A display system, comprising a display screen and a black dot control circuit, characterized in that, The black dot insertion control circuit is used to execute the black dot insertion method according to any one of claims 1-8.