Dark space compensation method and device of LED screen system, and storage medium

Abstract

The invention relates to the technical field of LED display screens, and discloses a dark space compensation method and device of an LED screen system and a storage medium, and the method comprises the steps: obtaining an associated dark space on the LED screen system; determining a plurality of compensation LED light-emitting units corresponding to the associated dark area according to the position of the associated dark area; calculating a compensation coefficient; and controlling the brightness of each compensation LED light-emitting unit to be improved according to the compensation coefficient. Visibly, a plurality of LED light-emitting unit dead pixels which are close to each other can be regarded as an associated dark area, and for the associated dark area, normal LED light-emitting units which are close to each other around the associated dark area are selected as compensation LED light-emitting units. The method comprises the following steps: firstly, designing an associated dark area, then designing a compensation coefficient of each compensation LED light-emitting unit on the basis of the Weber-Fechner law, and compensating the associated dark area by adjusting the brightness of each compensation LED light-emitting unit on the basis of the compensation coefficient, so that the problem of shadow caused by dead pixels of the LED light-emitting units can be alleviated to the greatest extent on the sensory level through the compensation.

Description

Technical Field

[0001] The present invention relates to the technical field of LED display screens, and in particular to a dark area compensation method and device, and a storage medium for an LED screen system. Background Art

[0002] The LED screen system includes an array composed of multiple LED light-emitting units, each of which can be controlled individually, such as the light board in the MiniLED backlight system. With the rapid development of display technology, MiniLED technology has been rapidly popularized. MiniLED backlight system refers to high-end direct-type backlight display technology and products with local dimming that are made using MiniLED chips (flip chips) or LED packaging devices (using front-mounted or flip chips). MiniLED backlight system can be roughly divided into the following modules in optics: light board, QD film, diffusion plate, LCD panel. The light emitted by the LED lamp beads on the light board is evenly illuminated through the lens to illuminate the entire diffusion plate, so that the light passes through the LCD panel to present different pictures.

[0003] In the actual use of MiniLED backlight systems by end customers, problems with factory processes or processes, or the influence of factors such as electrostatic discharge (ESD) and electrical overstress (EOS) often cause damage to the lamp beads and drivers, resulting in bad pixels in the LED light-emitting units. When these situations occur, it is very likely to cause abnormal phenomena in the backlight partitions, among which short circuits and open circuits are more common. At present, the backlight driver IC can detect the partitions and report whether any partitions have short circuits or open circuits.

[0004] When the MiniLED backlight system encounters an abnormal backlight partition, although the system can capture error information and has the function of closing abnormal channels, thus coping with some problems at the technical level, visual defects such as shadows are still difficult to avoid in terms of the intuitive user experience. These visual flaws, even if they are subtle, will undoubtedly have a significant negative impact on the market image and reputation of each brand if they appear frequently on the client side. After all, in the modern consumer market, users have increasingly stringent requirements for product quality and visual experience, and any subtle flaws may become a key factor affecting purchasing decisions.

[0005] In view of this, for products related to LED screen systems, how to take effective measures to reduce the shadow problem caused by bad pixels of LED light-emitting units at the sensory level has become a new challenge that needs to be solved urgently. Summary of the invention

[0006] The present invention provides a dark area compensation method and device, and a storage medium for an LED screen system, which are used to reduce the shadow problem caused by bad pixels of LED light-emitting units at the sensory level.

[0007] In order to solve the above technical problems, the first aspect of the present invention discloses a dark area compensation method for an LED screen system, wherein the LED screen system comprises an array composed of a plurality of LED light-emitting units, wherein each LED light-emitting unit can be controlled individually, and the method comprises: Acquire an associated dark area on the LED screen system, wherein the associated dark area includes at least one LED light-emitting unit bad point; wherein, if there are multiple LED light-emitting unit bad points in the associated dark area, the distance between any two LED light-emitting unit bad points is less than a preset first distance threshold; Determine, according to the associated dark area position, a plurality of compensation LED light-emitting units corresponding to the associated dark area, wherein the distance between each of the compensation LED light-emitting units and at least one LED light-emitting unit bad point is less than a preset second distance threshold; The compensation coefficient is calculated according to the following formula: k=(m+n) / m Wherein, k is the compensation coefficient, n is the number of bad pixels of the LED light-emitting unit in the associated dark area, and m is the number of the compensation LED light-emitting units corresponding to the associated dark area; The brightness of each of the compensation LED light-emitting units is controlled to be increased to k times of the original brightness.

[0008] As an optional implementation, in the first aspect of the present invention, obtaining the associated dark area on the LED screen system includes: Acquire an associated dark area on the LED screen system, wherein the associated dark area includes at least one LED light-emitting unit bad point; wherein, if there are multiple LED light-emitting unit bad points in the associated dark area, there is an adjacent relationship between any two of the LED light-emitting unit bad points; And, determining a plurality of compensation LED light-emitting units corresponding to the associated dark area according to the position of the associated dark area includes: According to the position of the associated dark area, a plurality of compensation LED light-emitting units corresponding to the associated dark area are determined, wherein each of the compensation LED light-emitting units corresponds to at least one LED light-emitting unit bad point in an adjacent relationship; The adjacent relationship means that in a 3×3 LED light-emitting unit grid, the center of the grid is a reference LED light-emitting unit, and the relationship between all LED light-emitting units except the center in the grid and the reference LED light-emitting unit is an adjacent relationship.

[0009] As an optional implementation, in the first aspect of the present invention, the associated dark area includes only one bad LED light-emitting unit, and the determining, according to the position of the associated dark area, a plurality of compensation LED light-emitting units corresponding to the associated dark area includes: According to the position of the bad point of the LED light-emitting unit, eight adjacent LED light-emitting units above, below, left, right, upper left, lower left, upper right and lower right of the LED light-emitting unit are determined as compensation LED light-emitting units; And, controlling the brightness of each of the compensation LED light-emitting units to be increased to k times of the original brightness includes: The brightness of each of the compensation LED light-emitting units is controlled to be increased to 1.125 times of the original brightness.

[0010] As an optional implementation, in the first aspect of the present invention, before obtaining the associated dark area on the LED screen system, the method further includes: Detecting the voltage value of the power supply channel of each LED light-emitting unit in the LED screen system, if it is detected at the first moment that the voltage value of the power supply channel of a certain LED light-emitting unit is within a preset abnormal voltage range, then determining that the LED light-emitting unit is the LED light-emitting unit to be verified; At a second moment, the voltage value of the power supply channel of the LED light-emitting unit to be verified is detected again, and the temperature of a preset area around the location of the LED light-emitting unit to be verified is obtained, wherein the second moment is after the first moment; If at the second moment it is monitored that the voltage value of the power supply channel of the LED light-emitting unit to be verified is still within the preset abnormal voltage range, and the temperature of the preset area around the location of the LED light-emitting unit to be verified is within the preset abnormal temperature range, then the LED light-emitting unit to be verified is determined to be a bad LED light-emitting unit.

[0011] As an optional embodiment, in the first aspect of the present invention, if it is monitored at the second moment that the voltage value of the power supply channel of the LED light-emitting unit to be verified is still within the preset abnormal voltage range, and the temperature of the preset area around the location of the LED light-emitting unit to be verified is within the preset abnormal temperature range, then determining that the LED light-emitting unit to be verified is a bad LED light-emitting unit includes: If at the second moment it is monitored that the voltage value of the power supply channel of the LED light-emitting unit to be verified is greater than or equal to a preset first comparison voltage, and the temperature of a preset area around the location of the LED light-emitting unit to be verified is greater than or equal to a preset first comparison temperature, then it is determined that the LED light-emitting unit to be verified is a short-circuit type LED light-emitting unit bad point.

[0012] As an optional embodiment, in the first aspect of the present invention, if it is monitored at the second moment that the voltage value of the power supply channel of the LED light-emitting unit to be verified is still within the preset abnormal voltage range, and the temperature of the preset area around the location of the LED light-emitting unit to be verified is within the preset abnormal temperature range, then determining that the LED light-emitting unit to be verified is a bad LED light-emitting unit includes: If at the second moment it is monitored that the voltage value of the power supply channel of the LED light-emitting unit to be verified is less than the preset second comparison voltage, and the temperature of the preset area around the location of the LED light-emitting unit to be verified is less than the preset second comparison temperature, then it is determined that the LED light-emitting unit to be verified is an open-circuit type LED light-emitting unit bad point.

[0013] As an optional embodiment, in the first aspect of the present invention, the method further comprises: After determining that the LED light emitting unit to be verified is a bad LED light emitting unit, the power supply channel of the bad LED light emitting unit is turned off.

[0014] A second aspect of the present invention discloses a dark area compensation device for an LED screen system, wherein the LED screen system comprises an array composed of a plurality of LED light-emitting units, wherein each LED light-emitting unit can be controlled individually, and the device comprises: A dark area acquisition module, used for acquiring an associated dark area on the LED screen system, wherein the associated dark area includes at least one LED light-emitting unit bad point; wherein, if there are multiple LED light-emitting unit bad points in the associated dark area, the distance between any two LED light-emitting unit bad points is less than a preset first distance threshold; A compensation determination module, used for determining a plurality of compensation LED light-emitting units corresponding to the associated dark area according to the position of the associated dark area, wherein the distance between each of the compensation LED light-emitting units and at least one LED light-emitting unit bad point is less than a preset second distance threshold; The coefficient determination module is used to calculate the compensation coefficient according to the following formula: k=(m+n) / m Wherein, k is the compensation coefficient, n is the number of bad pixels of the LED light-emitting unit in the associated dark area, and m is the number of the compensation LED light-emitting units corresponding to the associated dark area; The compensation control module is used to control the brightness of each of the compensation LED light-emitting units to increase to k times of the original brightness.

[0015] As an optional implementation, in the second aspect of the present invention, the specific manner in which the dark area acquisition module acquires the associated dark area on the LED screen system includes: Acquire an associated dark area on the LED screen system, wherein the associated dark area includes at least one LED light-emitting unit bad point; wherein, if there are multiple LED light-emitting unit bad points in the associated dark area, there is an adjacent relationship between any two of the LED light-emitting unit bad points; And, the compensation determination module determines the specific manner of the plurality of compensation LED light-emitting units corresponding to the associated dark area according to the position of the associated dark area, including: According to the position of the associated dark area, a plurality of compensation LED light-emitting units corresponding to the associated dark area are determined, wherein each of the compensation LED light-emitting units corresponds to at least one LED light-emitting unit bad point in an adjacent relationship; The adjacent relationship means that in a 3×3 LED light-emitting unit grid, the center of the grid is a reference LED light-emitting unit, and the relationship between all LED light-emitting units except the center in the grid and the reference LED light-emitting unit is an adjacent relationship.

[0016] As an optional implementation, in the second aspect of the present invention, the associated dark area includes only one bad point of an LED light-emitting unit, and the compensation determination module determines the specific manner of the multiple compensation LED light-emitting units corresponding to the associated dark area according to the position of the associated dark area, including: According to the position of the bad point of the LED light-emitting unit, eight adjacent LED light-emitting units above, below, left, right, upper left, lower left, upper right and lower right of the LED light-emitting unit are determined as compensation LED light-emitting units; And, the specific manner in which the compensation control module controls the brightness of each of the compensation LED light-emitting units to be increased to k times of the original brightness includes: The brightness of each of the compensation LED light-emitting units is controlled to be increased to 1.125 times of the original brightness.

[0017] As an optional implementation, in the second aspect of the present invention, the device further includes: A preliminary detection module is used to detect the voltage value of the power supply channel of each LED light-emitting unit in the LED screen system before the dark area acquisition module acquires the associated dark area on the LED screen system, and if the voltage value of the power supply channel of a certain LED light-emitting unit is detected to be within a preset abnormal voltage range at the first moment, the LED light-emitting unit is determined to be the LED light-emitting unit to be verified; A verification detection module, used to detect the voltage value of the power supply channel of the LED light-emitting unit to be verified again at a second moment, and obtain the temperature of a preset area around the location of the LED light-emitting unit to be verified, wherein the second moment is after the first moment; The bad pixel judgment module is used to monitor at the second moment that the voltage value of the power supply channel of the LED light-emitting unit to be verified is still within the preset abnormal voltage range, and the temperature of the preset area around the location of the LED light-emitting unit to be verified is within the preset abnormal temperature range, and determine that the LED light-emitting unit to be verified is a bad pixel of the LED light-emitting unit.

[0018] As an optional implementation, in the second aspect of the present invention, when the bad pixel judgment module monitors at the second moment that the voltage value of the power supply channel of the LED light-emitting unit to be verified is still within the preset abnormal voltage range, and the temperature of the preset area around the location of the LED light-emitting unit to be verified is within the preset abnormal temperature range, the specific manner of determining that the LED light-emitting unit to be verified is a bad pixel of the LED light-emitting unit includes: If at the second moment it is monitored that the voltage value of the power supply channel of the LED light-emitting unit to be verified is greater than or equal to a preset first comparison voltage, and the temperature of a preset area around the location of the LED light-emitting unit to be verified is greater than or equal to a preset first comparison temperature, then it is determined that the LED light-emitting unit to be verified is a short-circuit type LED light-emitting unit bad point.

[0019] As an optional implementation, in the second aspect of the present invention, when the bad pixel judgment module monitors at the second moment that the voltage value of the power supply channel of the LED light-emitting unit to be verified is still within the preset abnormal voltage range, and the temperature of the preset area around the location of the LED light-emitting unit to be verified is within the preset abnormal temperature range, the specific manner of determining that the LED light-emitting unit to be verified is a bad pixel of the LED light-emitting unit includes: If at the second moment it is monitored that the voltage value of the power supply channel of the LED light-emitting unit to be verified is less than the preset second comparison voltage, and the temperature of the preset area around the location of the LED light-emitting unit to be verified is less than the preset second comparison temperature, then it is determined that the LED light-emitting unit to be verified is an open-circuit type LED light-emitting unit bad point.

[0020] As an optional implementation, in the second aspect of the present invention, the device further includes: A shut-down module is used to shut down the power supply channel of the LED light-emitting unit after the bad point judgment module determines that the LED light-emitting unit to be verified is a bad point of the LED light-emitting unit. The third aspect of the present invention discloses another dark area compensation system of an LED screen system, the system comprising: A memory storing executable program code; a processor coupled to the memory; The processor calls the executable program code stored in the memory to execute the dark area compensation method of the LED screen system disclosed in the first aspect of the present invention.

[0021] The fourth aspect of the present invention discloses a computer storage medium, which stores computer instructions. When the computer instructions are called, they are used to execute the dark area compensation method of the LED screen system disclosed in the first aspect of the present invention.

[0022] Compared with the prior art, the present invention has the following beneficial effects: The present invention obtains the associated dark area on the LED screen system; determines the multiple compensation LED light-emitting units corresponding to the associated dark area according to the position of the associated dark area; calculates the compensation coefficient; and controls the brightness improvement of each compensation LED light-emitting unit according to the compensation coefficient. It can be seen that the present invention can regard several LED light-emitting units with a close distance (less than a first distance threshold) as an associated dark area, and for the associated dark area, selects normal LED light-emitting units with a close distance (less than a second distance threshold) around the associated dark area as compensation LED light-emitting units. Then, based on the Weber-Fechner law, the compensation coefficient of each compensation LED light-emitting unit is designed, and the compensation for the associated dark area is achieved by adjusting the brightness of each compensation LED light-emitting unit based on the compensation coefficient. Through this compensation, the shadow problem caused by the bad point of the LED light-emitting unit can be minimized at the sensory level. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a flow chart of a dark area compensation method of an LED screen system disclosed in an embodiment of the present invention; Figure 2 It is a schematic diagram of a light type superposition model on an LED screen system disclosed in an embodiment of the present invention; Figure 3 is a schematic diagram of the distribution of compensation LED light-emitting units when the associated dark area disclosed in the embodiment of the present invention includes one LED light-emitting unit defect; Figure 4 It is a schematic diagram of the distribution of compensation LED light-emitting units when the associated dark area disclosed in the embodiment of the present invention includes two bad LED light-emitting units; Figure 5It is a schematic diagram of the distribution of the compensation LED light-emitting units when the associated dark area disclosed in the embodiment of the present invention includes three bad LED light-emitting units; Figure 6 It is a structural schematic diagram of a dark area compensation device of an LED screen system disclosed in an embodiment of the present invention; Figure 7 It is a structural schematic diagram of a dark area compensation system of an LED screen system disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, device, product or end including a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units inherent to these processes, methods, products or ends.

[0027] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] The present invention discloses a dark area compensation method and device of an LED screen system, and a storage medium, which are used to reduce the shadow problem caused by a bad pixel of an LED light-emitting unit at a sensory level.

[0029] Embodiment 1 See also Figure 1 , Figure 1 1 is a flow chart of a dark area compensation method for an LED screen system disclosed in an embodiment of the present invention. Figure 1The dark area compensation method of the LED screen system described can be applied to the dark area compensation device of the LED screen system, and the dark area compensation device of the LED screen system can be integrated in a cloud server or a local server, which is not limited in the embodiment of the present invention. The LED screen system includes an array composed of a plurality of LED light-emitting units, wherein each LED light-emitting unit can be individually controlled, such as Figure 1 As shown, the dark area compensation method of the LED screen system may include the following operations: Step 101: Obtain the associated dark area on the LED screen system.

[0030] In the embodiment of the present invention, the associated dark area includes at least one LED light-emitting unit bad point; wherein, if there are multiple LED light-emitting unit bad points in the associated dark area, the distance between any two LED light-emitting unit bad points is less than a preset first distance threshold. That is, in the embodiment of the present invention, multiple LED light-emitting unit bad points whose distances are less than the first distance threshold are classified as one associated dark area, and in the subsequent compensation operation, compensation is also performed for the entire dark area.

[0031] The LED screen system includes an array composed of a plurality of LED light-emitting units, which is often a rectangular array, that is, an array composed of parallel horizontal rows and vertical longitudinal columns. For a rectangular array, the first distance threshold can be set to the average distance between any LED light-emitting unit and the four LED light-emitting units closest to it in the up, down, left, and right directions. Usually, the distance between any two LED light-emitting units in the same row and the same column in the rectangular array is equal. Therefore, the first distance threshold can be set to the distance between any two LED light-emitting units or a multiple of the distance. At this time, the associated dark area is composed of a series of close LED light-emitting units. Further, the first threshold can also be set to the average distance between any LED light-emitting unit and the four LED light-emitting units closest to it in the upper left, lower left, upper right, and lower right, or a multiple of the distance, and the range of the associated dark area is expanded at this time. For a circular or other shaped array, the first distance threshold can be set to the distance between two LED light-emitting units close to each other or a multiple of the distance.

[0032] The embodiment of the present invention takes the MiniLED backlight system as an example to illustrate its inventive concept. The MiniLED backlight system can be roughly divided into a lamp board, a QD film, a diffusion plate, and an LCD panel in optics. The light emitted by the LED lamp beads on the lamp board illuminates the entire diffusion plate evenly through the lens, so that the light passes through the LCD panel to present different pictures.

[0033] like Figure 2 As shown, the actual light distribution range on the light board can be figuratively equivalent to Figure 2 From Figure 2It can be observed vividly that the total brightness of the area within the middle red line is composed of the sum of the brightness of the light-emitting area of ​​the lamp beads in the red area and the light-emitting areas of all the surrounding lamp beads. The Weber-Fechner law points out that the change in human perception of stimuli is not linearly related to the actual change in stimuli, but a logarithmic relationship. A small increase in regional brightness at the same brightness is difficult for the human eye to detect. Therefore, when a lamp area is not bright, the embodiment of the present invention is based on this principle: if the lamp beads in the red area fail to emit light, light compensation can be achieved by increasing and optimizing the brightness of the surrounding lamp beads. Specifically, the brightness of the surrounding lamp areas is increased in a certain proportion, thereby minimizing the visual differences caused by abnormal partitions in terms of sensory perception to the greatest extent, and ensuring the uniformity and viewing of the overall light.

[0034] Based on the above principle, the embodiment of the present invention regards multiple LED light-emitting units with close distances (less than a preset first distance threshold) as the same associated dark area, and thus performs compensation operations on the associated dark area based on the above principle.

[0035] In the embodiment of the present invention, the LED light-emitting unit bad point includes the LED light-emitting unit that does not emit light or has extremely low light intensity due to short circuit or open circuit or other reasons. In addition, the above principle is explained by taking the MiniLED backlight system as an example, but the LED screen system in the embodiment of the present invention is not limited to the MiniLED backlight system, but can be applied to all display screens with LED light-emitting units as basic pixels.

[0036] Step 102: Determine a plurality of compensation LED light-emitting units corresponding to the associated dark area according to the position of the associated dark area.

[0037] In the embodiment of the present invention, the distance between each compensation LED light-emitting unit and at least one LED light-emitting unit bad point is less than a preset second distance threshold; wherein the second distance threshold may be the same as the first distance threshold, or may be increased by a number of distances on the basis of the first distance threshold. By setting the second distance threshold, the plurality of compensation LED light-emitting units are a plurality of LED light-emitting units that can emit light normally around the associated dark area, thereby increasing the brightness of the compensation LED light-emitting units to achieve compensation for the associated dark area.

[0038] Step 103: Calculate the compensation coefficient according to the following formula: k=(m+n) / m Wherein, k is the compensation coefficient, n is the number of bad pixels of the LED light-emitting units in the associated dark area, and m is the number of compensated LED light-emitting units corresponding to the associated dark area.

[0039] In this optional embodiment, the principle of setting the compensation coefficient to k=(m+n) / m is as follows: Consider n LED light-emitting unit failure points and m compensation LED light-emitting units as a visual whole. Assuming that the LED light-emitting unit failure points can emit light normally and the brightness of each LED light-emitting unit is 1, the brightness of the visual whole is m+n. When the LED light-emitting unit failure points do not emit light, based on the Weber-Fechner law, the brightness of the visual whole is kept at m+n to best maintain the visual experience of the human eye. Therefore, the brightness of each compensation LED light-emitting unit should be increased to (m+n) / m times the original brightness, so that the brightness of the visual whole is still (m+n) / m*m=(m+n).

[0040] Step 104: Control the brightness of each compensation LED light-emitting unit to increase to k times of the original brightness.

[0041] It can be seen that the embodiment of the present invention regards several LED light-emitting unit bad points with close distances (less than the first distance threshold) as an associated dark area, and for the associated dark area, selects normal LED light-emitting units with close distances (less than the second distance threshold) around the associated dark area as compensation LED light-emitting units. Then, based on the Weber-Fechner law, the compensation coefficient of each compensation LED light-emitting unit is designed, and the compensation of the associated dark area is achieved by adjusting the brightness of each compensation LED light-emitting unit based on the compensation coefficient. Through this compensation, the shadow problem caused by the bad points of the LED light-emitting unit can be minimized at the sensory level.

[0042] In a preferred embodiment, obtaining the associated dark area on the LED screen system includes: Acquire an associated dark area on the LED screen system, where the associated dark area includes at least one LED light-emitting unit bad point; wherein, if there are multiple LED light-emitting unit bad points in the associated dark area, there is an adjacent relationship between any two LED light-emitting unit bad points; And, according to the position of the associated dark area, determining a plurality of compensation LED light-emitting units corresponding to the associated dark area, including: According to the position of the associated dark area, a plurality of compensation LED light-emitting units corresponding to the associated dark area are determined, wherein each compensation LED light-emitting unit corresponds to at least one LED light-emitting unit bad point in an adjacent relationship; In this preferred embodiment, the adjacent relationship means that in a 3×3 LED light-emitting unit grid, the center of the grid is the reference LED light-emitting unit, and the relationship between all LED light-emitting units except the center in the grid and the reference LED light-emitting unit is an adjacent relationship. It should be noted that, assuming that in the grid, the distances between the LED light-emitting unit at the center of the grid and the four LED light-emitting units above, below, left and right of the grid are equal and all 1, then in this preferred embodiment, the first distance threshold and the second distance threshold are actually set to .

[0043] In this preferred embodiment, Figure 3 As shown, Figure 3 In the nine-square grid, the red square NG indicates a bad LED light-emitting unit, and the blank squares around the bad LED light-emitting unit indicate a compensating LED light-emitting unit. When the associated dark area includes only one bad LED light-emitting unit, the eight adjacent LED light-emitting units above, below, left, right, upper left, lower left, upper right and lower right of the bad LED light-emitting unit can be determined as compensating LED light-emitting units according to the position of the bad LED light-emitting unit; at this time, m=8, n=1, and k=1.125.

[0044] In this preferred embodiment, Figure 4 As shown in the figure, when the associated dark area includes two LED light-emitting unit bad pixels, it is divided into Figure 4 In the two cases a and b, the red area is the LED light-emitting unit with bad pixels, and the blank area is the compensation LED light-emitting unit. Figure 4 In a, the two bad points of the LED light-emitting units are located at respective diagonally opposite positions, and the compensating LED light-emitting units are surrounded by the two bad points of the above-mentioned LED light-emitting units. At this time, m=12, n=2, and k=1.16. Figure 4 In b, the two LED light-emitting units with bad points are arranged adjacent to each other, and the compensating LED light-emitting units are arranged around the two LED light-emitting units with bad points. At this time, m=10, n=2, and k=1.2.

[0045] In this preferred embodiment, Figure 5 As shown in the figure, when the associated dark area includes three LED light-emitting unit bad pixels, it is divided into Figure 5 In the four cases a, b, c and d, the red area is the LED light-emitting unit with bad pixels, and the blank area is the compensation LED light-emitting unit. Figure 5 In a, three bad LED light-emitting units are arranged adjacent to each other, and the compensating LED light-emitting units are arranged around the three bad LED light-emitting units. At this time, m=12, n=3, and k=1.25. Figure 5 Among the three bad points of LED light-emitting units in b, two bad points are adjacent to each other and two bad points are at respective diagonally opposite positions. The compensating LED light-emitting units are surrounded by the three bad points of the above-mentioned LED light-emitting units. At this time, m=14, n=3, and k=1.21. Figure 5 Among the three bad points of LED light-emitting units in c, the three bad points are all at their respective diagonal positions, and the compensating LED light-emitting units are surrounded by the above three bad points of LED light-emitting units. At this time, m=16, n=3, and k=1.18. Figure 5Among the three bad pixels of LED light emitting units in d, two bad pixels are adjacent to each other in the vertical direction, and two bad pixels are adjacent to each other in the horizontal direction. The compensating LED light emitting units are surrounded by the three bad pixels of LED light emitting units. At this time, m=12, n=3, and k=1.25.

[0046] It can be seen that in this preferred embodiment, the adjacent relationship is used as the basis for determining the associated dark areas and compensating LED light-emitting units, so that the bad pixels of LED light-emitting units that are associated with each other can be more reasonably combined together, and more reasonable compensating LED light-emitting units can be selected for them, thereby achieving compensation for the associated dark areas based on the Weber-Fechner law. Through this compensation, the shadow problem caused by the bad pixels of the LED light-emitting units can be minimized or eliminated at the sensory level.

[0047] In an optional embodiment, before acquiring the associated dark area on the LED screen system, the method may further include: Detecting the voltage value of the power supply channel of each LED light-emitting unit in the LED screen system, if it is detected at the first moment that the voltage value of the power supply channel of a certain LED light-emitting unit is within a preset abnormal voltage range, then determining that the LED light-emitting unit is the LED light-emitting unit to be verified; At a second moment, the voltage value of the power supply channel of the LED light-emitting unit to be verified is detected again, and the temperature of a preset area around the location of the LED light-emitting unit to be verified is obtained, wherein the second moment is after the first moment; If at the second moment it is monitored that the voltage value of the power channel of the LED light-emitting unit to be verified is still within the preset abnormal voltage range, and the temperature of the preset area around the location of the LED light-emitting unit to be verified is within the preset abnormal temperature range, then the LED light-emitting unit to be verified is determined to be a bad LED light-emitting unit.

[0048] In this optional embodiment, the judgment of whether the LED light-emitting unit is a bad pixel is mainly based on the voltage value of the power supply channel of the LED light-emitting unit and the temperature of its surroundings. However, the voltage value of the power supply channel of the LED light-emitting unit and the temperature of its surroundings may also change under other influencing factors. Not all changes in the voltage value of the power supply channel of the LED light-emitting unit and the temperature of its surroundings mean that the LED light-emitting unit is a bad pixel. For this reason, in this optional embodiment, if the voltage value of the power supply channel of a certain LED light-emitting unit is detected to be within the preset abnormal voltage range at the first moment, the LED light-emitting unit is determined to be a LED light-emitting unit to be verified. For the LED light-emitting unit to be verified, it is only a preliminary judgment that it may become a bad pixel. Further verification is required to determine whether it is a bad pixel of the LED light-emitting unit.

[0049] In this optional embodiment, a moment is selected as a second moment after a certain period of time has passed from the first moment, and at the second moment, whether the LED light emitting unit to be verified is a bad LED light emitting unit is re-detected. Since a bad LED light emitting unit is usually caused by a short circuit and an open circuit, the operation of verifying the LED light emitting unit to be verified may include the following two situations: If at the second moment it is monitored that the voltage value of the power supply channel of the LED light-emitting unit to be verified is greater than or equal to the preset first comparison voltage, and the temperature of the preset area around the location of the LED light-emitting unit to be verified is greater than or equal to the preset first comparison temperature, then the LED light-emitting unit to be verified is determined to be a short-circuit type LED light-emitting unit bad point.

[0050] If at the second moment it is monitored that the voltage value of the power supply channel of the LED light-emitting unit to be verified is less than the preset second comparison voltage, and the temperature of the preset area around the location of the LED light-emitting unit to be verified is less than the preset second comparison temperature, then it is determined that the LED light-emitting unit to be verified is an open-circuit type LED light-emitting unit bad point.

[0051] Further optionally, the method may also include: After determining that the LED light emitting unit to be verified is a bad LED light emitting unit, the power supply channel of the bad LED light emitting unit is turned off.

[0052] To further describe the inventive concept of this embodiment, the following description is still made by taking the MiniLED backlight system as an example: In the MiniLED backlight system, the screen in the display does not emit light by itself and needs the help of a backlight source to display images. The backlight provides uniform and stable light to the LCD panel, allowing the liquid crystal molecules to control whether the light passes through according to the changes in the electric field, thereby presenting different images. Without a backlight, the LCD display will not be able to display anything, just like a dark projection screen without light. Therefore, the MiniLED backlight system is optically divided into several main modules: light board, QD film, diffuser, and LCD panel. The light emitted by the LED lamp beads on the light board is evenly illuminated through the lens to make the light pass through the LCD panel to present different images.

[0053] The method flow of performing dark area compensation on the above MiniLED backlight system is as follows: S1, driver IC detection abnormality When an abnormal situation occurs in the system, the driver IC will respond quickly and accurately capture the abnormal signal by detecting the voltage change at the negative end of the chip channel.

[0054] Generally, the two most common abnormalities are open circuit and short circuit. When the circuit is open, the voltage value will approach zero, and when the circuit is short, the channel voltage will be higher than the internal comparison voltage of the IC.

[0055] S2, sent to the image processing unit Once the driver IC detects an abnormality, it will immediately report the abnormal information to the image processing unit through the data transmission line; S3. Determine whether it is a real abnormality After receiving the abnormal information, the image processing unit will start a secondary verification. It will send an instruction to the driver IC to re-detect the abnormal state. After receiving the instruction, the driver IC will perform abnormal detection again, including confirming whether the abnormality still exists and whether the temperature of the driver IC in the abnormal area has changed. Subsequently, the driver IC will send the results of the re-detection to the image processing unit again. If the second detection fails to detect the abnormality again, the system will preliminarily judge it as a false alarm and continue to monitor the area. If the abnormality occurs again, the system will immediately shut down the relevant channels and move on to the next processing flow.

[0056] S4. Locate the abnormal area After the image processing unit receives the second confirmed abnormal information, it will use the data fed back by the IC and its own built-in mapping array information to perform algorithm calculations to deduce the specific location of the abnormality and its impact range. This process provides key data support for subsequent abnormality processing.

[0057] During the early stage of system debugging, each channel of the entire backlight IC will correspond to which area of ​​the entire backlight in the form of an array and will be recorded into the driver control unit or image processing unit. In this way, the driver control unit or image processing unit will know the physical position of each channel of each chip. After an abnormality occurs, the driver IC will actively report which channel of which IC has the abnormality. At this time, the driver control unit or image processing unit can find the position of the screen where the abnormality occurs through the Mapping array information, and then determine how to compensate and how much brightness to compensate according to the number and position of the abnormalities.

[0058] S5. Determine the type of abnormality Based on the abnormal information reported by the driver IC, the image processing unit will further analyze and determine the type of abnormality. At the same time, it will also evaluate whether the abnormality conflicts with the customer's system protection mechanism and decide whether to initiate corresponding compensation measures based on the evaluation results.

[0059] S6. Compensation for abnormal areas After confirming that compensation measures need to be initiated, the image processing unit will use the compensation method of the present invention to perform accurate compensation processing based on the previously located abnormal area and its range. This process is intended to minimize the impact of abnormalities on the overall performance of the display system and the viewing experience.

[0060] Embodiment 2 See also Figure 6 , Figure 6 Schematic diagram of a dark area compensation device of an LED screen system disclosed in an embodiment of the present invention. The LED screen system may include an array composed of a plurality of LED light emitting units, wherein each LED light emitting unit can be individually controlled, such as Figure 6 As shown, the dark area compensation device of the LED screen system may include: The dark area acquisition module 201 is used to acquire the associated dark area on the LED screen system, where the associated dark area may include at least one LED light emitting unit bad point; wherein, if there are multiple LED light emitting unit bad points in the associated dark area, the distance between any two LED light emitting unit bad points is less than a preset first distance threshold; The compensation determination module 202 is used to determine a plurality of compensation LED light-emitting units corresponding to the associated dark area according to the position of the associated dark area, wherein the distance between each compensation LED light-emitting unit and at least one LED light-emitting unit bad point is less than a preset second distance threshold; The coefficient determination module 203 is used to calculate the compensation coefficient according to the following formula: k=(m+n) / m Wherein, k is the compensation coefficient, n is the number of bad LED light-emitting units in the associated dark area, and m is the number of compensation LED light-emitting units corresponding to the associated dark area; The compensation control module 204 is used to control the brightness of each compensation LED light-emitting unit to be increased to k times of the original brightness.

[0061] In an optional embodiment, the specific method of the dark area acquisition module 201 acquiring the associated dark area on the LED screen system may include: Acquire an associated dark area on the LED screen system, where the associated dark area may include at least one LED light-emitting unit bad point; wherein, if there are multiple LED light-emitting unit bad points in the associated dark area, there is an adjacent relationship between any two LED light-emitting unit bad points; Furthermore, the specific manner in which the compensation determination module 202 determines the multiple compensation LED light-emitting units corresponding to the associated dark area according to the position of the associated dark area may include: According to the position of the associated dark area, a plurality of compensation LED light-emitting units corresponding to the associated dark area are determined, wherein each compensation LED light-emitting unit corresponds to at least one LED light-emitting unit bad point in an adjacent relationship; The adjacent relationship means that in a 3×3 LED light-emitting unit grid, the center of the grid is the reference LED light-emitting unit, and the relationship between all LED light-emitting units except the center in the grid and the reference LED light-emitting unit is an adjacent relationship.

[0062] In another optional embodiment, the associated dark area may include only one LED light emitting unit bad point, and the specific manner in which the compensation determination module 202 determines the multiple compensation LED light emitting units corresponding to the associated dark area according to the position of the associated dark area may include: According to the position of the LED light-emitting unit defective point, eight adjacent LED light-emitting units above, below, left, right, upper left, lower left, upper right and lower right of the LED light-emitting unit are determined as compensation LED light-emitting units; Furthermore, the specific manner in which the compensation control module 204 controls the brightness of each compensation LED light-emitting unit to be increased to k times of the original brightness may include: The brightness of each compensation LED light-emitting unit is controlled to be increased to 1.125 times of the original brightness.

[0063] In yet another optional embodiment, the device may further include: A preliminary detection module (not shown) is used to detect the voltage value of the power supply channel of each LED light-emitting unit in the LED screen system before the dark area acquisition module 201 acquires the associated dark area on the LED screen system, and if the voltage value of the power supply channel of a certain LED light-emitting unit is detected to be within a preset abnormal voltage range at the first moment, the LED light-emitting unit is determined to be the LED light-emitting unit to be verified; A verification detection module (not shown) is used to detect the voltage value of the power supply channel of the LED light-emitting unit to be verified again at a second moment, and obtain the temperature of a preset area around the location of the LED light-emitting unit to be verified, wherein the second moment is after the first moment; A bad pixel judgment module (not shown) is used to determine that the LED light-emitting unit to be verified is a bad pixel of the LED light-emitting unit when it is monitored at the second moment that the voltage value of the power supply channel of the LED light-emitting unit to be verified is still within a preset abnormal voltage range, and the temperature of a preset area around the location of the LED light-emitting unit to be verified is within a preset abnormal temperature range.

[0064] In another optional embodiment, when the bad pixel judgment module monitors at the second moment that the voltage value of the power supply channel of the LED light-emitting unit to be verified is still within the preset abnormal voltage range, and the temperature of the preset area around the position of the LED light-emitting unit to be verified is within the preset abnormal temperature range, the specific method of determining that the LED light-emitting unit to be verified is a bad pixel of the LED light-emitting unit may include: If at the second moment it is monitored that the voltage value of the power supply channel of the LED light-emitting unit to be verified is greater than or equal to the preset first comparison voltage, and the temperature of the preset area around the location of the LED light-emitting unit to be verified is greater than or equal to the preset first comparison temperature, then the LED light-emitting unit to be verified is determined to be a short-circuit type LED light-emitting unit bad point.

[0065] In another optional embodiment, when the bad pixel judgment module monitors at the second moment that the voltage value of the power supply channel of the LED light-emitting unit to be verified is still within the preset abnormal voltage range, and the temperature of the preset area around the position of the LED light-emitting unit to be verified is within the preset abnormal temperature range, the specific method of determining that the LED light-emitting unit to be verified is a bad pixel of the LED light-emitting unit may include: If at the second moment it is monitored that the voltage value of the power supply channel of the LED light-emitting unit to be verified is less than the preset second comparison voltage, and the temperature of the preset area around the location of the LED light-emitting unit to be verified is less than the preset second comparison temperature, then it is determined that the LED light-emitting unit to be verified is an open-circuit type LED light-emitting unit bad point.

[0066] In yet another optional embodiment, the device may further include: The shut-down module (not shown) is used to shut down the power supply channel of the LED light-emitting unit with a bad point after the bad point judgment module determines that the LED light-emitting unit to be verified is a bad point of the LED light-emitting unit.

[0067] Embodiment 3 See also Figure 7 , Figure 7 Schematic diagram of the structure of a dark area compensation system of an LED screen system disclosed in an embodiment of the present invention. Figure 7 As shown, the dark area compensation system of the LED screen system may include: A memory 301 storing executable program codes; a processor 302 coupled to the memory 301; The processor 302 calls the executable program code stored in the memory 301 to execute the steps in the dark area compensation method of the LED screen system described in the first embodiment of the present invention.

[0068] Embodiment 4 An embodiment of the present invention discloses a computer storage medium, which stores computer instructions. When the computer instructions are called, they are used to execute the steps in the dark area compensation method of the LED screen system described in the first embodiment of the present invention.

[0069] Embodiment 5 An embodiment of the present invention discloses a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to enable a computer to execute the steps in the dark area compensation method of the LED screen system described in Example 1.

[0070] The device embodiments described above are only illustrative, wherein the modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, i.e., they may be located in one place, or they may be distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative work.

[0071] Through the specific description of the above embodiments, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on such an understanding, the above technical solution can be essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, and the storage medium includes a read-only memory (ROM), a random access memory (RAM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), a one-time programmable read-only memory (OTPROM), an electronically erasable programmable read-only memory (EEPROM), a compact disc (CD-ROM) or other optical disc storage, magnetic disk storage, magnetic tape storage, or any other computer-readable medium that can be used to carry or store data.

[0072] Finally, it should be noted that the dark area compensation method, device, and storage medium of a LED screen system disclosed in the embodiment of the present invention only disclose the preferred embodiments of the present invention, which are only used to illustrate the technical solution of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features therein may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A dark area compensation method for an LED screen system, characterized in that: The LED screen system comprises an array of a plurality of LED light-emitting units, wherein each LED light-emitting unit can be controlled individually, and the method comprises: Acquire an associated dark area on the LED screen system, wherein the associated dark area includes at least one LED light-emitting unit bad point; wherein, if there are multiple LED light-emitting unit bad points in the associated dark area, the distance between any two LED light-emitting unit bad points is less than a preset first distance threshold; Determine, according to the associated dark area position, a plurality of compensation LED light-emitting units corresponding to the associated dark area, wherein the distance between each of the compensation LED light-emitting units and at least one LED light-emitting unit bad point is less than a preset second distance threshold; The compensation coefficient is calculated according to the following formula: k=(m+n) / m Wherein, k is the compensation coefficient, n is the number of bad pixels of the LED light-emitting unit in the associated dark area, and m is the number of the compensation LED light-emitting units corresponding to the associated dark area; The brightness of each of the compensation LED light-emitting units is controlled to be increased to k times of the original brightness.

2. The dark area compensation method of the LED screen system according to claim 1, characterized in that: The obtaining of the associated dark area on the LED screen system comprises: Acquire an associated dark area on the LED screen system, wherein the associated dark area includes at least one LED light-emitting unit bad point; wherein, if there are multiple LED light-emitting unit bad points in the associated dark area, there is an adjacent relationship between any two of the LED light-emitting unit bad points; And, determining a plurality of compensation LED light-emitting units corresponding to the associated dark area according to the position of the associated dark area includes: According to the position of the associated dark area, a plurality of compensation LED light-emitting units corresponding to the associated dark area are determined, wherein each of the compensation LED light-emitting units corresponds to at least one LED light-emitting unit bad point in an adjacent relationship; The adjacent relationship means that in a 3×3 LED light-emitting unit grid, the center of the grid is a reference LED light-emitting unit, and the relationship between all LED light-emitting units except the center in the grid and the reference LED light-emitting unit is an adjacent relationship.

3. The dark area compensation method of the LED screen system according to claim 2, characterized in that: The associated dark area includes only one LED light-emitting unit bad point, and the determining, according to the position of the associated dark area, a plurality of compensation LED light-emitting units corresponding to the associated dark area includes: According to the position of the bad point of the LED light-emitting unit, eight adjacent LED light-emitting units above, below, left, right, upper left, lower left, upper right and lower right of the LED light-emitting unit are determined as compensation LED light-emitting units; And, controlling the brightness of each of the compensation LED light-emitting units to be increased to k times of the original brightness includes: The brightness of each of the compensation LED light-emitting units is controlled to be increased to 1.125 times of the original brightness.

4. The dark area compensation method of the LED screen system according to claim 2, characterized in that: Before obtaining the associated dark area on the LED screen system, the method further includes: Detecting the voltage value of the power supply channel of each LED light-emitting unit in the LED screen system, if it is detected at the first moment that the voltage value of the power supply channel of a certain LED light-emitting unit is within a preset abnormal voltage range, then determining that the LED light-emitting unit is the LED light-emitting unit to be verified; At a second moment, the voltage value of the power supply channel of the LED light-emitting unit to be verified is detected again, and the temperature of a preset area around the location of the LED light-emitting unit to be verified is obtained, wherein the second moment is after the first moment; If at the second moment it is monitored that the voltage value of the power supply channel of the LED light-emitting unit to be verified is still within the preset abnormal voltage range, and the temperature of the preset area around the location of the LED light-emitting unit to be verified is within the preset abnormal temperature range, then the LED light-emitting unit to be verified is determined to be a bad LED light-emitting unit.

5. The dark area compensation method of the LED screen system according to claim 4, characterized in that: If it is monitored at the second moment that the voltage value of the power supply channel of the LED light-emitting unit to be verified is still within the preset abnormal voltage range, and the temperature of a preset area around the location of the LED light-emitting unit to be verified is within the preset abnormal temperature range, then determining that the LED light-emitting unit to be verified is a bad LED light-emitting unit includes: If at the second moment it is monitored that the voltage value of the power supply channel of the LED light-emitting unit to be verified is greater than or equal to a preset first comparison voltage, and the temperature of a preset area around the location of the LED light-emitting unit to be verified is greater than or equal to a preset first comparison temperature, then it is determined that the LED light-emitting unit to be verified is a short-circuit type LED light-emitting unit bad point.

6. The dark area compensation method of the LED screen system according to claim 5, characterized in that: If it is monitored at the second moment that the voltage value of the power supply channel of the LED light-emitting unit to be verified is still within the preset abnormal voltage range, and the temperature of a preset area around the location of the LED light-emitting unit to be verified is within the preset abnormal temperature range, then determining that the LED light-emitting unit to be verified is a bad LED light-emitting unit includes: If at the second moment it is monitored that the voltage value of the power supply channel of the LED light-emitting unit to be verified is less than the preset second comparison voltage, and the temperature of the preset area around the location of the LED light-emitting unit to be verified is less than the preset second comparison temperature, then it is determined that the LED light-emitting unit to be verified is an open-circuit type LED light-emitting unit bad point.

7. The dark area compensation method of the LED screen system according to claim 4, characterized in that: The method further comprises: After determining that the LED light emitting unit to be verified is a bad LED light emitting unit, the power supply channel of the bad LED light emitting unit is turned off.

8. A dark area compensation device for an LED screen system, characterized in that: The LED screen system comprises an array consisting of a plurality of LED light-emitting units, wherein each LED light-emitting unit can be controlled individually, and the device comprises: A dark area acquisition module, used for acquiring an associated dark area on the LED screen system, wherein the associated dark area includes at least one LED light-emitting unit bad point; wherein, if there are multiple LED light-emitting unit bad points in the associated dark area, the distance between any two LED light-emitting unit bad points is less than a preset first distance threshold; A compensation determination module, configured to determine, according to the position of the associated dark area, a plurality of compensation LED light-emitting units corresponding to the associated dark area, wherein the distance between each of the compensation LED light-emitting units and at least one LED light-emitting unit bad point is less than a preset second distance threshold; The coefficient determination module is used to calculate the compensation coefficient according to the following formula: k=(m+n) / m Wherein, k is the compensation coefficient, n is the number of bad pixels of the LED light-emitting unit in the associated dark area, and m is the number of the compensation LED light-emitting units corresponding to the associated dark area; The compensation control module is used to control the brightness of each of the compensation LED light-emitting units to increase to k times of the original brightness.

9. A dark area compensation system for an LED screen system, characterized in that: The system includes: a memory storing executable program code; a processor coupled to the memory; the processor calls the executable program code stored in the memory to execute the dark area compensation method of the LED screen system as described in any one of claims 1-7.

10. A computer storage medium, characterized in that: The computer storage medium stores computer instructions, and when the computer instructions are called, they are used to execute the dark area compensation method of the LED screen system as described in any one of claims 1-7.

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