A bright-dark line repairing method and device for LED display screen
By identifying the target area and adjusting the brightness value on the LED display screen, and employing weighted averaging and gentle processing techniques, bright and dark lines are automatically repaired. This solves the problems of low efficiency and human factors in existing technologies, achieving efficient and accurate bright and dark line repair results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHENZHEN LIDING PHOTOELECTRIC TECH
- Filing Date
- 2023-09-15
- Publication Date
- 2026-06-12
Smart Images
Figure CN117198208B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of LED display correction technology, specifically to a method and apparatus for repairing bright and dark lines on an LED display. Background Technology
[0002] LED displays have a wide range of applications, such as advertising, conferences and exhibitions, and information dissemination. With increasing market demand, people are paying more and more attention to the display effects of LED displays. Medium and large-sized LED displays are mostly composed of LED cabinets, and a single LED cabinet is composed of multiple LED modules. During the splicing process, limitations in machining precision and splicing accuracy often result in the distance between LED dots at the edges of the spliced LED cabinets being greater or less than the distance between LED dots at the edges of non-LED cabinets (dot pitch). This causes changes in the luminous density of the LED dots at the edges, which can produce bright or dark lines when displaying low-frequency images.
[0003] To achieve a good display effect, the LED display's LED dots need to be calibrated, i.e., bright and dark lines need to be repaired. Current methods for repairing bright and dark lines involve software reading data from the main control unit about the gaps around the LED domes, checking the display status of the current gaps, determining whether to increase or decrease the brightness data for the current area, and then sending the processed data back to the receiving card. This approach to repairing bright and dark lines is inefficient because the adjustment of the LED dots requires manual judgment during the repair process, and the results are limited by human factors.
[0004] Therefore, those skilled in the art urgently need to develop a new technical solution to address the above problems. Summary of the Invention
[0005] To overcome the problems existing in related technologies, this invention discloses a method and apparatus for repairing bright and dark lines in LED displays.
[0006] According to a first aspect of the disclosed embodiments of the present invention, a method for repairing bright and dark lines in an LED display screen is provided, the method comprising:
[0007] Identify the target area where the bright and dark lines on the LED display screen are located;
[0008] If the bright and dark line is a horizontal bright and dark line located on the edge of the screen, the row of edge lights below the bright and dark line is taken as the first target light point, and the average value between the brightness value of the bright and dark line and the brightness value of the adjacent light points of the edge light point is taken as the first target brightness value.
[0009] If the bright and dark line is a vertical bright and dark line, the edge light point located at the angle between the bright and dark line and the edge of the screen is taken as the first target light point, and the weighted average of the brightness values of the two light points closest to it in the segmented area where each first target light point is located is taken as the first target brightness value. The segmented area is a number of areas divided by the bright and dark line into the target area.
[0010] If the light and dark lines are two intersecting light and dark lines, select the corresponding number of light points on both sides of the light and dark lines as the first target light points according to the width of each light and dark line.
[0011] If the brightness of the two intersecting bright and dark lines is uniform, the brightness value of the light point on the boundary of the target area is taken as the first target brightness value.
[0012] If the brightness of the two intersecting bright and dark lines changes uniformly, the brightness values of the lamps on the boundary of the target area, which decrease from large to small, are increased, and then the brightness values of the lamps on the boundary of the target area are used as the second target brightness value.
[0013] The light points in the target area other than the first target light point are determined as the second target light points, and the brightness value of the light points on the boundary of the target area is taken as the second target brightness value corresponding to the second target light point.
[0014] Based on the relative positional relationship between the target light point and the LED display screen, the brightness value of the target light point is adjusted to the target brightness value. At the same time, the brightness value of the central intersecting light point is softened based on the average brightness value of the adjacent light points of the central intersecting light point, so as to repair the bright and dark lines of the LED display screen. The central intersecting light point is the light point whose brightness value is repeatedly adjusted among the first target light points in the two rows of the two intersecting bright and dark lines.
[0015] Optionally, after adjusting the brightness value of the target light point to the target brightness value based on the relative positional relationship between the target light point and the LED display screen, the method further includes:
[0016] Determine whether the difference between the adjusted brightness value of the first target light point and the brightness value of the light point on the boundary of the target area is greater than the preset target difference threshold.
[0017] If the difference is greater than the target difference threshold, the light point between the first target light point and the light point on the boundary of the target area is used as the intermediate reference light point.
[0018] Based on the brightness value of the first target light point and the brightness values of the light points on the boundary of the target area, the brightness value of the intermediate reference light point is subjected to gradient processing so that the brightness values of the light points on the boundary of the target area change in a uniform gradient with respect to the first target light point. 。
[0019] Optionally, the step of taking the weighted average of the brightness values of the two nearest light points within the segmented area where each first target light point is located as the first target brightness value includes:
[0020] Within the segmented area, identify the first adjacent light point that is in the same row as the first target light point and is closest to it, and the second adjacent light point that is in the same column as the first target light point and is closest to it.
[0021] The sum of the brightness values of 75% of the first adjacent light points and the brightness values of 25% of the second adjacent light points is used as the weighted average value;
[0022] The weighted average value is used as the first target brightness value.
[0023] Optionally, if the bright and dark lines are two intersecting lines, a corresponding number of light points are selected on both sides of each line as the first target light points, based on the width of each line.
[0024] If the bright and dark lines are two intersecting bright and dark lines, the width of the first bright and dark line is determined to be the width of n light points, and the width of the second bright and dark line is the width of m light points.
[0025] Select n rows of light points on both sides of the first bright and dark line as the third target light points;
[0026] m rows of lights were selected on both sides of the second bright and dark line as the fourth target lights.
[0027] Optionally, adjusting the brightness value of the target light point to the target brightness value based on the relative positional relationship between the target light point and the LED display screen includes:
[0028] Determine the relative offset position between the display module and the LED display screen where the target area is located. The relative offset position is the relative offset position between the upper left corner of the LED display screen and the upper left vertex of the display module.
[0029] Determine the position of each target light point within the display module where the target area is located;
[0030] Based on the relative offset position and the position of each target light point in the display module, the relative positional relationship between each target light point and the LED display screen is determined;
[0031] Adjust the brightness value of the target light point to the target brightness value.
[0032] Optionally, the step of softening the brightness value of the central intersecting light point based on the average brightness of adjacent light points includes:
[0033] The overlapping light points in the n rows of third target light points on both sides of the first bright and dark line and the m rows of fourth target light points on both sides of the second bright and dark line are determined as the central intersection light points.
[0034] Within the segmented area, identify the light points that are in the same row, adjacent to, and equal in number to the central intersecting light points as the third adjacent light points;
[0035] Within the segmented area, identify the light points that are in the same column as the central intersecting light point, adjacent to each other, and equal in number as the fourth adjacent light point;
[0036] The average brightness of the third and fourth adjacent light points is used as the brightness value of the central intersecting light point to soften its brightness.
[0037] Optionally, the method further includes:
[0038] After repairing the bright and dark lines on the LED display screen using the bright and dark line repair method described in the first aspect of the present invention, the difference in brightness values between the LED dots on the LED display screen is measured to see if there is any abnormality.
[0039] If an anomaly is found, repeat the steps of the bright and dark line repair method described in the first aspect of the present invention until the difference in brightness values between the LED dots on the LED display screen is no longer abnormal.
[0040] According to a second aspect of the disclosed embodiments of the present invention, an apparatus for repairing bright and dark lines in an LED display screen is provided, the apparatus comprising:
[0041] The target area determination module determines the target area where the bright and dark lines on the LED display screen are located.
[0042] The first single-slit adjustment module is connected to the target area determination module. If the bright and dark line is a horizontal bright and dark line located on the edge of the screen, the row of edge lights below the bright and dark line is taken as the first target lights, and the average value between the brightness value of the bright and dark line and the brightness value of the adjacent lights of the edge lights is taken as the first target brightness value.
[0043] The second single-slit adjustment module is connected to the target area determination module. If the bright and dark line is a vertical bright and dark line, the edge light point located at the angle between the bright and dark line and the edge of the screen is taken as the first target light point. The weighted average of the brightness values of the two light points closest to each first target light point in the segmented area is taken as the first target brightness value. The segmented area is a number of areas divided by the bright and dark line into the target area.
[0044] The first target light spot determination module is connected to the target area determination module. If the bright and dark lines are two intersecting bright and dark lines, the corresponding number of light spots on both sides of the bright and dark lines are selected as the first target light spots according to the width of each bright and dark line.
[0045] The first double-slit adjustment module is connected to the first target light spot determination module. If the brightness of the two intersecting bright and dark lines is uniform, the brightness value of the light spot on the boundary of the target area is taken as the first target brightness value.
[0046] The second double-slit adjustment module is connected to the first target light point determination module. If the brightness of the two intersecting bright and dark lines changes uniformly, the brightness value of the light point on the boundary of the target area, which decreases from large to small, is increased, and then the brightness value of the light point on the boundary of the target area is used as the second target brightness value.
[0047] A conventional light spot adjustment module is connected to the first single-slit adjustment module, the second single-slit adjustment module, the first double-slit adjustment module, and the second double-slit adjustment module respectively. The light spots in the target area other than the first target light spot are determined as the second target light spots, and the brightness value of the light spots on the boundary of the target area is taken as the second target brightness value corresponding to the second target light spot.
[0048] The bright / dark line repair module is connected to the conventional lamp adjustment module. Based on the relative positional relationship between the target lamp and the LED display screen, it adjusts the brightness value of the target lamp to the target brightness value. At the same time, it softens the brightness value of the central intersecting lamp based on the average brightness of the adjacent lamps of the central intersecting lamp, in order to repair the bright / dark lines on the LED display screen. The central intersecting lamp is the lamp whose brightness value is repeatedly adjusted among the first target lamps in the two rows of the two intersecting bright / dark lines.
[0049] Optionally, the device further includes:
[0050] The brightness difference judgment module is connected to the bright and dark line repair module to determine whether the difference between the brightness value of the adjusted first target light point and the brightness value of the light point on the boundary of the target area is greater than the preset target difference threshold.
[0051] The intermediate reference light point determination module is connected to the brightness difference judgment module. If the difference is greater than the target difference threshold, the light point between the first target light point and the light point on the boundary of the target area is taken as the intermediate reference light point.
[0052] The gradient processing module, connected to the intermediate reference light point determination module, performs gradient processing on the brightness value of the intermediate reference light point based on the brightness value of the first target light point and the brightness value of the light points on the boundary of the target area, so that the brightness value of the light points on the boundary of the target area changes with the brightness value of the first target light point in a uniform gradient.
[0053] Optionally, the second single-seam adjustment module includes:
[0054] The adjacent light spot determination unit determines, within the segmented area, a first adjacent light spot that is in the same row as the first target light spot and is closest to it, and a second adjacent light spot that is in the same column as the first target light spot and is closest to it;
[0055] The weighted average value determination unit is connected to the adjacent light point determination unit, and uses the sum of 75% of the brightness value of the first adjacent light point and 25% of the brightness value of the second adjacent light point as the weighted average value.
[0056] The target brightness value determination unit is connected to the weighted average value determination unit, and uses the weighted average value as the first target brightness value.
[0057] In summary, this invention discloses a method and apparatus for repairing bright and dark lines on an LED display screen. The method includes: determining a target area; if the line is horizontal, adjusting the brightness value of the edge LEDs below the line to the average brightness value of the line and adjacent edge LEDs; if the line is vertical, adjusting the brightness value of the edge LEDs at the angle between the line and the screen edge to the weighted average brightness value of two adjacent LEDs; if the intersecting lines have uniform brightness, adjusting the LEDs on both sides of the line to the brightness value of the LEDs on the boundary of the target area and softening the central intersecting LEDs; if the intersecting lines have uniformly varying brightness, adjusting the LEDs on both sides to the brightness value of the LEDs on the boundary of the target area and applying gradient processing, and softening the central intersecting LEDs; and adjusting the regular LEDs to the brightness value of the LEDs on the boundary of the area. This method automatically identifies the target LEDs to be adjusted, improving efficiency, and the repair results are not affected by human factors, resulting in higher accuracy.
[0058] Other features and advantages disclosed in this invention will be described in detail in the following detailed description section. Attached Figure Description
[0059] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:
[0060] Figure 1 This is a flowchart illustrating a method for repairing bright and dark lines on an LED display screen according to an exemplary embodiment;
[0061] Figure 2 It is based on Figure 1 This is a schematic diagram of a horizontal light and dark line;
[0062] Figure 3 It is based on Figure 1This is a schematic diagram of a vertical light and dark line;
[0063] Figure 4 It is based on Figure 1 The flowchart shown is a method for determining a first target brightness value based on a weighted average value;
[0064] Figure 5 It is based on Figure 1 A flowchart of a method for determining a first target light spot is shown;
[0065] Figure 6 It is based on Figure 1 The diagram shows an example of intersecting light and dark lines.
[0066] Figure 7 It is based on Figure 6 This diagram illustrates the boundary light points of a target area with intersecting bright and dark lines.
[0067] Figure 8 It is based on Figure 1 A flowchart illustrating a method for adjusting the brightness value of a lamp point is shown.
[0068] Figure 9 It is based on Figure 1 A flowchart illustrating a gentle processing method is shown;
[0069] Figure 10 It is based on Figure 6 This diagram illustrates a cross-shaped light spot at the center of a line with intersecting light and dark areas.
[0070] Figure 11 It is based on Figure 10 This diagram illustrates an example of adjacent light points with intersecting bright and dark lines.
[0071] Figure 12 It is based on Figure 1 A flowchart illustrating another method for repairing bright and dark lines on an LED display screen;
[0072] Figure 13 This is a structural block diagram of a bright / dark line repair device for an LED display screen according to an exemplary embodiment;
[0073] Figure 14 It is based on Figure 13 A structural block diagram of another LED display screen bright / dark line repair device is shown;
[0074] Figure 15 It is based on Figure 13 The diagram shows a structural block diagram of a second single-slit adjustment module. Detailed Implementation
[0075] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present disclosure.
[0076] Figure 1 This is a flowchart illustrating a method for repairing bright and dark lines on an LED display screen according to an exemplary embodiment, such as... Figure 1 As shown, the method includes:
[0077] In step 101, the target area where the bright and dark lines on the LED display screen are located is determined.
[0078] For example, the target area is selected by the user in the software (first, the brightness of the LED display screen is measured using a light gun; after identifying the target area with abnormal brightness, the user selects the target area in the software). The target area includes the target LED points whose brightness values need to be adjusted when repairing bright and dark lines, as well as the bright and dark lines themselves. After determining the target area, steps 102-107 are performed to determine the target brightness value corresponding to the target LED points based on the type of bright and dark lines and the type of target LED points within the target area. Then, step 108 is performed to adjust the brightness value of the target LED points to the target brightness value based on their relative position to the LED display screen.
[0079] It is understood that the target light point includes the first target light point and the second target light point, and the target brightness value in the following steps includes the first target brightness value and the second target brightness value.
[0080] In step 102, if the bright and dark line is a horizontal bright and dark line located on the edge of the screen, the row of edge lights below the bright and dark line is taken as the first target light point, and the average value between the brightness value of the bright and dark line and the brightness value of the adjacent light points of the edge light point is taken as the first target brightness value.
[0081] For example, if the bright / dark line is a horizontal bright / dark line located at the edge of the screen, such as... Figure 2 As shown, Figure 2 The dotted line in the diagram represents the edge of the LED display screen, which is also the bright and dark line (gap) in the target area. At this time, the row of LEDs located below the gap is the edge LED, i.e., the first target LED to be adjusted. When adjusting the first target LED, its brightness value should be adjusted to the first target brightness value. In the embodiments disclosed in this invention, the first target brightness value is the average value between the brightness value of the bright and dark line and the brightness values of the adjacent LEDs of the edge LED. The adjacent LEDs of the edge LED are... Figure 2 A row of white lights below the black light in the middle.
[0082] In step 103, if the bright and dark line is a vertical bright and dark line, the edge light point located at the angle between the bright and dark line and the edge of the screen is taken as the first target light point, and the weighted average of the brightness values of the two light points closest to it in the segmented area where each first target light point is located is taken as the first target brightness value.
[0083] The segmented region is a number of regions formed by dividing the target region into light and dark areas.
[0084] For example, if the light-dark line is a vertical light-dark line, such as... Figure 3 As shown, the vertical light and dark lines intersect with the straight line containing the screen edge. The light points at the angle between the light and dark lines and the screen edge are taken as edge light points (e.g., Figure 3 The black light point shown is the first target light point whose brightness value needs to be adjusted. Adjust the brightness value of the first target light point to the first target brightness value.
[0085] Specifically, Figure 4 It is based on Figure 1 The flowchart shown is a method for determining a first target brightness value based on a weighted average value, as follows: Figure 4 As shown, step 103 includes:
[0086] In step 1031, within the segmented area, a first adjacent light point that is in the same row as the first target light point and is closest to it, and a second adjacent light point that is in the same column as the first target light point and is closest to it, are determined.
[0087] For example, such as Figure 3 As shown, the light and dark lines divide the target area into two segments, each containing one primary target light point. Taking the left-hand segment as an example, the light point in the same row as the primary target light point and closest to it is the first adjacent light point, i.e. Figure 3 The red light in the image that is in the same column as the first target light and is closest to it is the second adjacent light. Figure 3 The green light dot in the image. The division area on the right is similar to the division area on the left.
[0088] In step 1032, the sum of the brightness values of 75% of the first adjacent light points and the brightness values of 25% of the second adjacent light points is used as the weighted average value.
[0089] In step 1033, the weighted average value is used as the first target brightness value.
[0090] For example, the first adjacent light point and the second adjacent light point have different weight values, wherein the weight of the first adjacent light point is greater than the weight of the second adjacent light point. In the embodiment disclosed in this invention, the weight coefficient of the first adjacent light point is 75%, and the weight coefficient of the second adjacent light point is 25%. Therefore, the sum of the brightness values of 75% of the first adjacent light point and the brightness values of 25% of the second adjacent light point is used as the weighted average value (i.e., the first target brightness value).
[0091] Additionally, it should be noted that in the embodiments disclosed in this invention, the width of the vertical bright and dark line is the width of one LED dot. Therefore, the number of edge LED dots at the angle between the vertical bright and dark line and the screen edge is one. If the width of the vertical bright and dark line is the width of n LED dots, then the number of edge LED dots at the angle between the vertical bright and dark line and the screen edge is n. The number of the first adjacent LED dots that are in the same row as the edge LED dots and are closest to each other is n. The number of the second adjacent LED dots that are in the same column as the edge LED dots and are closest to each other is n.
[0092] In step 104, if the bright and dark lines are two intersecting lines, select a corresponding number of light points on both sides of each line as the first target light points based on the width of each line.
[0093] Specifically, Figure 5 It is based on Figure 1 A flowchart of a method for determining a first target light spot is shown, as follows: Figure 5 As shown, step 104 includes:
[0094] In step 1041, if the bright and dark lines are two intersecting bright and dark lines, the width of the first bright and dark line is determined to be the width of n light points, and the width of the second bright and dark line is the width of m light points.
[0095] For example, such as Figure 6 As shown in the image, there are two intersecting bright and dark lines, each with a different width (it should be noted that the width of the bright and dark lines is usually a multiple of the width of the light spot). Figure 6 The vertical light and dark lines are wider, equivalent to the width of n light points, while the horizontal light and dark lines are narrower, equivalent to the width of m light points. This is understandable. Figure 6 The vertical light and dark lines are designated as the first light and dark lines, and the horizontal light and dark lines are designated as the second light and dark lines.
[0096] In step 1042, n rows of light points are selected on both sides of the first bright and dark line as the third target light points.
[0097] In step 1043, m rows of lights are selected on both sides of the second bright and dark line as the fourth target lights.
[0098] For example, such as Figure 6As shown, the width of the first bright-dark line (the vertical bright-dark line) is the width of two light points. Therefore, two rows of light points are selected on each side of the first bright-dark line as the third target light points (i.e., Figure 6 Four rows of black LEDs on either side of the central vertical light-dark line. The width of the second light-dark line (the horizontal light-dark line) is the width of one LED. Therefore, one row of LEDs is selected on each side of the second light-dark line as the fourth target LED (i.e., Figure 6 (Two rows of black light points on either side of the horizontal light-dark line). The third and fourth target light points together form the first target light point whose brightness value needs to be adjusted.
[0099] In step 105, if the brightness of the two intersecting bright and dark lines is uniform, the brightness value of the light point on the boundary of the target area is taken as the first target brightness value.
[0100] For example, if the two intersecting bright and dark lines form a uniformly bright gap, the brightness value of the first target light point is adjusted based on the brightness values of the light points on the boundary of the target area. Wherein, the light points on the boundary of the target area are as follows: Figure 7 The white light spots in the image are shown, and the brightness values of the light spots on the boundary of the target area are obtained by measuring with a light gun.
[0101] In step 106, if the brightness of the two intersecting bright and dark lines changes uniformly, the brightness values of the light spots on the boundary of the target area, which decrease from large to small, are increased, and then the brightness values of the light spots on the boundary of the target area are used as the second target brightness value.
[0102] For example, for bright and dark lines with varying brightness, since these lines are formed by gaps during the splicing process, their brightness varies uniformly. Based on the length of this section of the bright and dark line, each first target light point requiring adjustment is weighted. For instance, for 20 first target light points, if the end of the bright and dark line needs an additional brightness adjustment of 20 beyond the base adjustment of 100, then the base brightness of the first light point is increased by 100, and the additional adjustment is 0 (since it's a uniform change, it can be assumed that the brightness at at least one end of the seam is consistent with the surrounding area). The second is 100+1… the 20th is 100+20 (i.e., the weighting for the first light point is 0, the second is 1 / 20… the 20th is 100%). In this way, uniform adjustment across the entire seam can be achieved with the same percentage, avoiding individual adjustment of each light point along the seam.
[0103] In step 107, the light points in the target area other than the first target light point are determined as the second target light points, and the brightness values of the light points on the boundary of the target area are used as the second target brightness values corresponding to the second target light points.
[0104] For example, the light points in the target area other than the first target light point are called the second target light points. The second target light points can also be called regular light points. Usually, after adjusting the brightness value of the first target light point, it is also necessary to adjust the brightness value of the above-mentioned regular light points. That is, the brightness value of the second target light point is adjusted to the second target brightness value. The second target brightness value is the brightness value of the light points on the boundary of the target area.
[0105] In step 108, the brightness value of the target light point is adjusted to the target brightness value according to the relative positional relationship between the target light point and the LED display screen. At the same time, the brightness value of the central cross light point is softened according to the average brightness value of the adjacent light points of the central cross light point in order to repair the bright and dark lines of the LED display screen.
[0106] Among them, the central intersecting light point is the light point whose brightness value is repeatedly adjusted among the first target light points in the two rows of the two intersecting bright and dark lines.
[0107] For example, after determining the first target light point and its corresponding first target brightness value in the target area, and the second target light point and its corresponding second target brightness value, the positions of the first and second target light points are determined on the LED display screen. The brightness value of the first target light point is adjusted to the first target brightness value, and the brightness value of the second target light point is adjusted to the second target brightness value. Additionally, for the first target light point in two intersecting bright and dark lines, since there are central intersecting light points with repeatedly adjusted brightness values in the two rows of first target light points, it is necessary to soften the central intersecting light points to neutralize the brightness values that have been repeatedly adjusted.
[0108] Specifically, Figure 8 It is based on Figure 1 The flowchart shown is a method for adjusting the brightness value of a lamp point, as follows: Figure 8 As shown, step 108 includes:
[0109] In step 1081, the relative offset position between the display module where the target area is located and the LED display screen is determined. This relative offset position is the relative offset position between the upper left corner of the LED display screen and the upper left vertex of the display module.
[0110] For example, it can be understood that the bright and dark lines are generated during the splicing of display modules. After determining the display module where the bright and dark lines are located, the upper left corner of the LED display screen is taken as the starting point coordinate, and the upper left vertex of the display module is taken as the reference point. The offset between the starting point coordinate and the reference point determines the relative offset position.
[0111] In step 1082, the position of each target light point in the display module where the target area is located is determined.
[0112] For example, the position of a target light point in the display module can be determined by the target light point being located in the xth row and yth column of the display module, or by the coordinate value of the target light point in the coordinate system of the display module.
[0113] In step 1083, the relative positional relationship between each target light point and the LED display screen is determined based on the relative offset position and the position of each target light point in the display module.
[0114] In step 1084, the brightness value of the target light point is adjusted to the target brightness value.
[0115] For example, by determining the position of the target LED light within the display module and its relative offset from the LED display screen, the relative positional relationship of the target LED light within the LED display screen can be determined. Based on this relative positional relationship, the target LED light can be selected, and its brightness value can be adjusted to the target brightness value.
[0116] Figure 9 It is based on Figure 1 A flowchart of a gentle processing method is shown, such as Figure 9 As shown, step 108 also includes:
[0117] In step 1085, the overlapping light points in the n rows of third target light points on both sides of the first bright and dark line and the m rows of fourth target light points on both sides of the second bright and dark line are determined as the central intersection light points.
[0118] For example, it is understandable that Figure 6 There are centrally intersecting light points among the third target light point in row n and the fourth target light point in row m. When the brightness of the target light points is adjusted to the target brightness value through step 1084 above, the brightness value of the centrally intersecting light points is essentially corrected twice. Therefore, further softening processing is needed for the centrally intersecting light points. Figure 10 As shown, Figure 10 The black light spot at the angle between the two intersecting bright and dark lines is the central intersecting light spot. Figure 10 The central intersection of lights and Figure 6 (The third target light in row n corresponds to the fourth target light in row m).
[0119] In step 1086, the third adjacent light point is determined in the segmented area as the light point that is in the same row as the light point that intersects with the center, is adjacent to it, and has the same number of light points.
[0120] In step 1087, the light points in the segmented area that are in the same column as the light point that intersects the center, are adjacent to each other, and have the same number are identified as the fourth adjacent light point.
[0121] For example, after determining the central intersecting light point, for each segmented area, the central intersecting light point is softened based on its adjacent light points within that segmented area. For example... Figure 11 As shown, Figure 11 The target area is divided into four segments. Taking the top-left segment as an example, the two black lights are the central intersection lights. The two red lights selected with a black border to the left of the black lights are the third adjacent lights, located in the same row as the central intersection lights and in equal numbers. The two red lights selected with a black border above the black lights are the fourth adjacent lights, located in the same column as the central intersection lights and in equal numbers. The method for determining the third and fourth adjacent lights in the top-right, bottom-left, and bottom-right segments is the same as that in the top-left segment. The yellow, green, and blue lights selected with black borders are respectively determined as the third and fourth adjacent lights in the top-right, bottom-left, and bottom-right segments.
[0122] In step 1088, the average brightness of the third adjacent light point and the fourth adjacent light point is used as the brightness value of the central intersecting light point, so as to soften the brightness value of the central intersecting light point.
[0123] For example, the average of the brightness values of the third and fourth adjacent light points is taken as the brightness value of the central intersecting light point, which is the process of softening the brightness value of the central intersecting light point.
[0124] Figure 12 It is based on Figure 1 A flowchart of another method for repairing bright and dark lines on an LED display screen is shown, as follows: Figure 12 As shown, this step includes:
[0125] In step 1201, it is determined whether the difference between the adjusted brightness value of the first target light point and the brightness value of the light point on the boundary of the target area is greater than the preset target difference threshold.
[0126] In step 1202, if the difference is greater than the target difference threshold, the light point between the first target light point and the light point on the boundary of the target area is used as the intermediate reference light point.
[0127] For example, after repairing the bright and dark lines of the LED display screen through steps 101-108 above, it is determined whether the difference between the brightness value of the first target lamp point and the lamp point on the boundary of the target area is greater than a preset target difference threshold. In the embodiment of the present invention, when the difference in brightness value between the first target lamp point and the lamp point on the boundary of the target area is greater than 20% of the brightness value of the first target lamp point, the operation in step 1203 is performed.
[0128] Specifically, such as Figure 7 As shown, Figure 7 The black light point indicated by the middle arrow is the first target light point, and the white light point indicated by the other arrow is the light point on the boundary of the target area. When the difference in brightness between the black light point and the white light point is greater than 20% of the brightness value of the black light point, the brightness value of the intermediate reference light point needs to be adjusted. Figure 7 The red, yellow, green, and blue lights in the diagram are all intermediate reference lights.
[0129] In step 1203, based on the brightness value of the first target light point and the brightness value of the light point on the boundary of the target area, the brightness value of the intermediate reference light point is subjected to gradient processing so that the brightness value of the light point on the boundary of the target area changes uniformly with the brightness value of the first target light point.
[0130] For example, the brightness value of the intermediate reference light point is gradient-processed, such as... Figure 7 As shown in the upper left corner of the image, gradient processing is applied to the red light point so that the brightness value of the red light point is the average of the brightness values of the white light point and the black light point (that is, the brightness value of the red light point takes a uniform gradient), thereby achieving a uniform change in brightness value from white light point to red light point to black light point.
[0131] Understandably, if the difference in brightness between the first target light point and the light point on the boundary of the target area is less than or equal to the target difference threshold, no processing is required, and the bright-dark line repair work is considered complete.
[0132] In addition, the method also includes: after repairing the bright and dark lines on the LED display screen using the bright and dark line repair method, measuring whether there is an abnormality in the difference in brightness values between the LED dots on the LED display screen; if there is an abnormality, repeating the steps of the bright and dark line repair method until there is no abnormality in the difference in brightness values between the LED dots on the LED display screen.
[0133] For example, after completing the repair work on the bright and dark lines of the LED display screen, the brightness values of various parts of the LED display screen are collected by a light gun, and it is determined whether there is any abnormality (i.e., bright and dark lines still appear). If there is an abnormality, the operations in steps 101-108 above are repeated until the brightness values on the screen measured by the light gun no longer show any abnormality.
[0134] Figure 13 This is a structural block diagram illustrating a bright / dark line repair device for an LED display screen according to an exemplary embodiment, such as... Figure 13 As shown, the device 1300 includes:
[0135] The target area determination module 1310 determines the target area where the bright and dark lines on the LED display screen are located.
[0136] The first single-slit adjustment module 1320 is connected to the target area determination module 1310. If the bright and dark line is a horizontal bright and dark line located on the edge of the screen, a row of edge lights below the bright and dark line is taken as the first target lights, and the average value between the brightness value of the bright and dark line and the brightness value of the adjacent lights of the edge lights is taken as the first target brightness value.
[0137] The second single-slit adjustment module 1330 is connected to the target area determination module 1310. If the bright and dark line is a vertical bright and dark line, the edge light point located at the angle between the bright and dark line and the edge of the screen is taken as the first target light point. The weighted average of the brightness values of the two light points closest to each first target light point in the segmented area is taken as the first target brightness value. The segmented area is a number of areas divided by the bright and dark line in the target area.
[0138] The first target light spot determination module 1340 is connected to the target area determination module 1310. If the bright and dark lines are two intersecting bright and dark lines, the corresponding number of light spots on both sides of the bright and dark lines are selected as the first target light spots according to the width of each bright and dark line.
[0139] The first double-slit adjustment module 1350 is connected to the first target light spot determination module 1340. If the brightness of the two intersecting bright and dark lines is uniform, the brightness value of the light spot on the boundary of the target area is taken as the first target brightness value.
[0140] The second double-slit adjustment module 1360 is connected to the first target light spot determination module 1340. If the brightness of the two intersecting bright and dark lines changes uniformly, the brightness value of the light spot on the boundary of the target area, which decreases from large to small, is increased, and then the brightness value of the light spot on the boundary of the target area is used as the second target brightness value.
[0141] The conventional light spot adjustment module 1370 is connected to the first single-slit adjustment module 1320, the second single-slit adjustment module 1330, the first double-slit adjustment module 1350 and the second double-slit adjustment module 1360 respectively. The light spots in the target area other than the first target light spot are determined as the second target light spots, and the brightness value of the light spots on the boundary of the target area is taken as the second target brightness value corresponding to the second target light spot.
[0142] The bright / dark line repair module 1380 is connected to the conventional lamp point adjustment module 1370. Based on the relative positional relationship between the target lamp point and the LED display screen, the brightness value of the target lamp point is adjusted to the target brightness value. At the same time, the brightness value of the central intersecting lamp point is softened based on the average brightness value of the adjacent lamp points of the central intersecting lamp point, so as to repair the bright / dark lines of the LED display screen. The central intersecting lamp point is the lamp point whose brightness value is repeatedly adjusted among the first target lamp points in the two rows of the two intersecting bright / dark lines.
[0143] Figure 14 It is based on Figure 13 Another structural block diagram of a bright / dark line repair device for an LED display screen is shown, as follows: Figure 14 As shown, the device 1400 also includes:
[0144] The brightness difference judgment module 1410 is connected to the bright and dark line repair module to determine whether the difference between the brightness value of the adjusted first target light point and the brightness value of the light point on the boundary of the target area is greater than the preset target difference threshold.
[0145] The intermediate reference light point determination module 1420 is connected to the brightness difference judgment module 1410. If the difference is greater than the target difference threshold, the light point between the first target light point and the light point on the boundary of the target area is taken as the intermediate reference light point.
[0146] The gradient processing module 1430 is connected to the intermediate reference light point determination module 1420. Based on the brightness value of the first target light point and the brightness value of the light point on the boundary of the target area, the gradient processing module 1430 performs gradient processing on the brightness value of the intermediate reference light point so that the brightness value of the light point on the boundary of the target area changes uniformly with the brightness value of the first target light point.
[0147] Figure 15 It is based on Figure 13 The diagram shown is a structural block diagram of a second single-slit adjustment module, such as... Figure 15 As shown, the second single-seam adjustment module 1330 includes:
[0148] The adjacent light spot determination unit 1331 determines, within the segmented area, the first adjacent light spot that is in the same row as the first target light spot and is closest to it, and the second adjacent light spot that is in the same column as the first target light spot and is closest to it.
[0149] The weighted average value determination unit 1332 is connected to the adjacent light point determination unit 1331, and uses the sum of 75% of the brightness value of the first adjacent light point and 25% of the brightness value of the second adjacent light point as the weighted average value.
[0150] The target brightness value determination unit 1333 is connected to the weighted average value determination unit 1332, and uses the weighted average value as the first target brightness value.
[0151] In summary, this invention discloses a method and apparatus for repairing bright and dark lines on an LED display screen. The method includes: determining a target area; if the line is horizontal, adjusting the brightness value of the edge LEDs below the line to the average brightness value of the line and adjacent edge LEDs; if the line is vertical, adjusting the brightness value of the edge LEDs at the angle between the line and the screen edge to the weighted average brightness value of two adjacent LEDs; if the intersecting lines have uniform brightness, adjusting the LEDs on both sides of the line to the brightness value of the LEDs on the boundary of the target area and softening the central intersecting LEDs; if the intersecting lines have uniformly varying brightness, adjusting the LEDs on both sides to the brightness value of the LEDs on the boundary of the target area and applying gradient processing, and softening the central intersecting LEDs; and adjusting the regular LEDs to the brightness value of the LEDs on the boundary of the area. This method automatically identifies the target LEDs to be adjusted, improving efficiency, and the repair results are not affected by human factors, resulting in higher accuracy.
[0152] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.
[0153] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.
[0154] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.
Claims
1. A method for repairing bright and dark lines on an LED display screen, characterized in that, The method includes: Identify the target area where the bright and dark lines on the LED display screen are located; If the bright and dark line is a horizontal bright and dark line located on the edge of the screen, the row of edge lights below the bright and dark line is taken as the first target light point, and the average value between the brightness value of the bright and dark line and the brightness value of the adjacent light points of the edge light point is taken as the first target brightness value. If the bright and dark line is a vertical bright and dark line, the edge light point located at the angle between the bright and dark line and the edge of the screen is taken as the first target light point, and the weighted average of the brightness values of the two light points closest to it in the segmented area where each first target light point is located is taken as the first target brightness value. The segmented area is a number of areas divided by the bright and dark line into the target area. If the light and dark lines are two intersecting light and dark lines, select the corresponding number of light points on both sides of the light and dark lines as the first target light points according to the width of each light and dark line. If the brightness of the two intersecting bright and dark lines is uniform, the brightness value of the light point on the boundary of the target area is taken as the first target brightness value. If the brightness of the two intersecting bright and dark lines changes uniformly, the brightness values of the lamps on the boundary of the target area, which decrease from large to small, are increased, and then the brightness values of the lamps on the boundary of the target area are used as the second target brightness value. The light points in the target area other than the first target light point are determined as the second target light points, and the brightness value of the light points on the boundary of the target area is taken as the second target brightness value corresponding to the second target light point. Based on the relative positional relationship between the target light point and the LED display screen, the brightness value of the target light point is adjusted to the target brightness value. Simultaneously, the brightness value of the centrally intersecting light point is softened based on the average brightness of its adjacent light points to repair the bright and dark lines on the LED display screen. The centrally intersecting light point refers to the light point whose brightness value is repeatedly adjusted among the first target light points in the two rows of intersecting bright and dark lines. After adjusting the brightness value of the target light point to the target brightness value based on the relative positional relationship between the target light point and the LED display screen, the method further includes: Determine whether the difference between the adjusted brightness value of the first target light point and the brightness value of the light point on the boundary of the target area is greater than the preset target difference threshold. If the difference is greater than the target difference threshold, the light point between the first target light point and the light point on the boundary of the target area is used as the intermediate reference light point. Based on the brightness value of the first target light point and the brightness value of the light points on the boundary of the target area, the brightness value of the intermediate reference light point is subjected to gradient processing so that the brightness value of the light points on the boundary of the target area changes uniformly with the brightness value of the first target light point.
2. The method for repairing bright and dark lines in an LED display screen according to claim 1, characterized in that, The step of taking the weighted average of the brightness values of the two nearest light points within the segmented area of each first target light point as the first target brightness value includes: Within the segmented area, identify the first adjacent light point that is in the same row as the first target light point and is closest to it, and the second adjacent light point that is in the same column as the first target light point and is closest to it. The sum of the brightness values of 75% of the first adjacent light points and the brightness values of 25% of the second adjacent light points is used as the weighted average value; The weighted average value is used as the first target brightness value.
3. The method for repairing bright and dark lines in an LED display screen according to claim 1, characterized in that, If the bright and dark lines are two intersecting lines, a corresponding number of light points are selected on both sides of each line as the first target light points, based on the width of each line. If the bright and dark lines are two intersecting bright and dark lines, the width of the first bright and dark line is determined to be the width of n light points, and the width of the second bright and dark line is the width of m light points. Select n rows of light points on both sides of the first bright and dark line as the third target light points; m rows of lights were selected on both sides of the second bright and dark line as the fourth target lights.
4. The method for repairing bright and dark lines in an LED display screen according to claim 1, characterized in that, The step of adjusting the brightness value of the target light point to the target brightness value based on the relative positional relationship between the target light point and the LED display screen includes: Determine the relative offset position between the display module and the LED display screen where the target area is located. The relative offset position is the relative offset position between the upper left corner of the LED display screen and the upper left vertex of the display module. Determine the position of each target light point within the display module where the target area is located; Based on the relative offset position and the position of each target light point in the display module, the relative positional relationship between each target light point and the LED display screen is determined; Adjust the brightness value of the target light point to the target brightness value.
5. The method for repairing bright and dark lines in an LED display screen according to claim 3, characterized in that, The process of softening the brightness value of the centrally intersecting light point based on the average brightness of adjacent light points includes: The overlapping light points in the n rows of third target light points on both sides of the first bright and dark line and the m rows of fourth target light points on both sides of the second bright and dark line are determined as the central intersection light points. Within the segmented area, identify the light points that are in the same row, adjacent to, and equal in number to the central intersecting light points as the third adjacent light points; Within the segmented area, identify the light points that are in the same column as the central intersecting light point, adjacent to each other, and equal in number as the fourth adjacent light point; The average brightness of the third and fourth adjacent light points is used as the brightness value of the central intersecting light point to soften its brightness.
6. The method for repairing bright and dark lines in an LED display screen according to claim 1, characterized in that, The method further includes: After repairing the bright and dark lines on the LED display screen using the bright and dark line repair method according to any one of claims 1-5, measure whether there is any abnormality in the difference in brightness values between the LED dots on the LED display screen; If any abnormality exists, repeat the steps of the bright and dark line repair method according to any one of claims 1-5 until there is no abnormality in the difference in brightness values between the light points on the LED display screen.
7. A device for repairing bright and dark lines in an LED display screen, characterized in that, The device includes: The target area determination module determines the target area where the bright and dark lines on the LED display screen are located. The first single-slit adjustment module is connected to the target area determination module. If the bright and dark line is a horizontal bright and dark line located on the edge of the screen, the row of edge lights below the bright and dark line is taken as the first target lights, and the average value between the brightness value of the bright and dark line and the brightness value of the adjacent lights of the edge lights is taken as the first target brightness value. The second single-slit adjustment module is connected to the target area determination module. If the bright and dark line is a vertical bright and dark line, the edge light point located at the angle between the bright and dark line and the edge of the screen is taken as the first target light point. The weighted average of the brightness values of the two light points closest to each first target light point in the segmented area is taken as the first target brightness value. The segmented area is a number of areas divided by the bright and dark line into the target area. The first target light spot determination module is connected to the target area determination module. If the bright and dark lines are two intersecting bright and dark lines, the corresponding number of light spots on both sides of the bright and dark lines are selected as the first target light spots according to the width of each bright and dark line. The first double-slit adjustment module is connected to the first target light spot determination module. If the brightness of the two intersecting bright and dark lines is uniform, the brightness value of the light spot on the boundary of the target area is taken as the first target brightness value. The second double-slit adjustment module is connected to the first target light point determination module. If the brightness of the two intersecting bright and dark lines changes uniformly, the brightness value of the light point on the boundary of the target area, which decreases from large to small, is increased, and then the brightness value of the light point on the boundary of the target area is used as the second target brightness value. A conventional light spot adjustment module is connected to the first single-slit adjustment module, the second single-slit adjustment module, the first double-slit adjustment module, and the second double-slit adjustment module respectively. The light spots in the target area other than the first target light spot are determined as the second target light spots, and the brightness value of the light spots on the boundary of the target area is taken as the second target brightness value corresponding to the second target light spot. The bright and dark line repair module is connected to the conventional lamp point adjustment module. Based on the relative positional relationship between the target lamp point and the LED display screen, the brightness value of the target lamp point is adjusted to the target brightness value. At the same time, the brightness value of the central intersecting lamp point is softened based on the average brightness value of the adjacent lamp points of the central intersecting lamp point, so as to repair the bright and dark lines of the LED display screen. The central intersecting lamp point is the lamp point whose brightness value is repeatedly adjusted among the first target lamp points in the two rows of the two intersecting bright and dark lines. The brightness difference judgment module is connected to the bright and dark line repair module to determine whether the difference between the brightness value of the adjusted first target light point and the brightness value of the light point on the boundary of the target area is greater than the preset target difference threshold. The intermediate reference light point determination module is connected to the brightness difference judgment module. If the difference is greater than the target difference threshold, the light point between the first target light point and the light point on the boundary of the target area is taken as the intermediate reference light point. The gradient processing module, connected to the intermediate reference light point determination module, performs gradient processing on the brightness value of the intermediate reference light point based on the brightness value of the first target light point and the brightness value of the light points on the boundary of the target area, so that the brightness value of the light points on the boundary of the target area changes with the brightness value of the first target light point in a uniform gradient.
8. The LED display screen bright / dark line repair device according to claim 7, characterized in that, The second single-seam adjustment module includes: The adjacent light spot determination unit determines, within the segmented area, a first adjacent light spot that is in the same row as the first target light spot and is closest to it, and a second adjacent light spot that is in the same column as the first target light spot and is closest to it; The weighted average value determination unit is connected to the adjacent light point determination unit, and uses the sum of 75% of the brightness value of the first adjacent light point and 25% of the brightness value of the second adjacent light point as the weighted average value. The target brightness value determination unit is connected to the weighted average value determination unit, and uses the weighted average value as the first target brightness value.