CN114648965A - Screen shadow compensation method and backlight module - Google Patents
Screen shadow compensation method and backlight module Download PDFInfo
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- G—PHYSICS
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- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
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- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
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- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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Abstract
The application provides a screen shadow compensation method and a backlight module, which relate to the technical field of LED display screens, wherein the method comprises the following steps: detecting the brightness of the central area and the edge splicing area of each backlight module of the LED display screen under different test currents; and determining a first current compensation relation of each first LED lamp according to the brightness of the central area and the brightness of the edge splicing area of each backlight module, wherein the first current compensation relation is used for indicating the compensation current of the first LED lamp under different working currents, and the first LED lamp is the LED lamp of the edge splicing area of each backlight module. The application provides a technical scheme can weaken the shadow of LED backlight unit concatenation department in the backlight, weakens the influence of shadow to display effect.
Description
Technical Field
The present disclosure relates to the field of Light Emitting Diode (LED) display screen technologies, and in particular, to a screen shadow compensation method and a backlight module.
Background
With the development of LED display technology, LED display screens are widely used in various fields, especially in the field of sub-millimeter Light Emitting diodes (Mini LEDs), due to their advantages of low cost, low power consumption, high visibility, freedom in assembly, etc.
The Mini LED is an LED device with the chip size of 50-200 mu m. With the rapid development of the Mini LED display technology, the Mini LED display product has been widely applied to the fields of ultra-large screen high definition display such as monitoring and commanding, high definition broadcasting, high-end cinema, medical diagnosis, advertisement display, conference exhibition, office display, virtual reality, etc.
The LED display screen is generally formed by splicing a plurality of groups of LED backlight modules, and due to the limitations of machining precision, splicing precision and the like, gaps can be generated at the splicing position of the lamp panel of the LED display screen, so that shadows can be generated at the splicing position of the lamp panel when the LED is used as a backlight source to emit light, and the display effect can be influenced.
Disclosure of Invention
In view of this, the present application provides a screen shadow compensation method and a backlight module, so as to weaken a shadow at a splicing position of an LED backlight module during backlight, thereby weakening an influence of the shadow on a display effect.
In order to achieve the above object, in a first aspect, an embodiment of the present application provides a screen shading compensation method, including:
detecting the brightness of the central area and the edge splicing area of each backlight module of the LED display screen under different test currents;
determining a first current compensation relation of each first LED lamp according to the brightness of the central area and the brightness of the edge splicing area of each backlight module, wherein the first current compensation relation is used for indicating the compensation current of the first LED lamp under different working currents, and the first LED lamp is the LED lamp of the edge splicing area of each backlight module.
As an optional implementation manner of the embodiment of the present application, the first current compensation relationship includes a plurality of working current intervals, and each working current interval corresponds to one compensation current;
the first compensation current of each first LED lamp is the compensation current corresponding to the working current interval in which the working current of the first LED lamp is located in the first current compensation relation of the first LED lamp.
As an optional implementation manner of the embodiment of the present application, the method further includes:
detecting the brightness of a transition area of each backlight module of the LED display screen under different test currents, wherein the transition area of each backlight module is positioned between the central area and the edge splicing area of the backlight module;
and determining a second current compensation relation of each second LED lamp according to the brightness of the central area and the brightness of the transition area of each backlight module, wherein the second current compensation relation is used for indicating the compensation current of the second LED lamp under different working currents, and the second LED lamp is the LED lamp of the transition area of each backlight module.
As an optional implementation manner of the embodiment of the present application, the second current compensation relationship includes a plurality of working current intervals, and each working current interval corresponds to one compensation current;
and the second compensation current of each second LED lamp is the compensation current corresponding to the working current interval in which the working current of the second LED lamp is located in the second current compensation relation of the second LED lamp.
As an optional implementation manner of the embodiment of the present application, each test current of the backlight modules is the same during each detection.
As an optional implementation manner of the embodiment of the application, the LED display screen is formed by splicing a plurality of backlight modules, a gap is formed at the spliced position, and the distance between the edge splicing area and the gap is smaller than or equal to a set distance.
As an optional implementation manner of the embodiment of the present application, the LED lamps on each backlight module are arranged in an array, and an edge splicing region of each backlight module includes: and the backlight module is provided with a row of LED lamps which are closest to the splicing seams.
In a second aspect, an embodiment of the present application provides an electronic device, including: a memory for storing a computer program and a processor; the processor is configured to perform the method of the first aspect or any of the embodiments of the first aspect when the computer program is invoked.
In a third aspect, an embodiment of the present application provides an LED display screen, including a backlight module and an edge lamp panel controller;
the edge lamp panel controller is used for determining a first compensation current of each first LED lamp according to the working current of each first LED lamp and a first current compensation relation; and adjusting the current of each first LED lamp according to each first compensation current, wherein the first LED lamp is an LED lamp in an edge splicing region of each backlight module, and the first current compensation relationship is determined by using the method according to any one of claims 1 to 5.
As an optional implementation manner of the embodiment of the application, the LED display screen further includes a transition lamp panel controller, where the transition lamp panel controller is configured to determine a second compensation current of each second LED lamp according to a compensation relationship between a working current of each second LED lamp and a second current; and adjusting the current of each second LED lamp according to each second compensation current, wherein the second LED lamp is an LED lamp in a transition region of each backlight module, the second current compensation relationship is determined by the method according to any one of claims 1 to 5, and the transition region of each backlight module is located between a center region and an edge splicing region of the backlight module.
As an optional implementation manner of the embodiment of the present application, the LED lamp arrays on the backlight modules are arranged, and the edge splicing area of each backlight module includes: and the backlight module is provided with a row of LED lamps which are closest to the splicing seams.
According to the screen shadow compensation scheme provided by the embodiment of the application, the brightness of the central area and the brightness of the edge splicing area of each backlight module of the LED display screen under different test currents are detected; and then determining a first current compensation relation of each first LED lamp according to the brightness of the central area and the brightness of the edge splicing area of each backlight module, wherein the first current compensation relation is used for indicating the compensation current of the first LED lamp under different working currents, and the first LED lamp is the LED lamp of the edge splicing area of each backlight module. According to the scheme, when the LED display screen works, the compensation current of each first LED lamp is determined according to the working current of each first LED lamp and the first current compensation relation, and the current of each first LED lamp is adjusted according to each compensation current, so that the brightness of the edge splicing area of each backlight module is approximately consistent with the brightness of the central area, the shadow at the splicing position of the LED backlight module in the backlight process is weakened, and the influence of the shadow on the display effect is weakened.
Drawings
Fig. 1 is a schematic flowchart of a compensation method for splicing shadows of an LED display screen according to a first embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of an electronic device according to a first embodiment of the present application;
fig. 3 is a schematic structural diagram of an LED display screen according to a first embodiment of the present application;
fig. 4 is a schematic structural diagram of a backlight module according to a first embodiment of the present application;
fig. 5 is a schematic structural diagram of a backlight module according to a second embodiment of the present application;
fig. 6 is a schematic structural diagram of a backlight module according to a third embodiment of the present application.
Description of reference numerals:
1-a backlight assembly; 2-edge lamp panel controller;
3-a transition lamp panel controller;
11-a backlight module;
111-LED lamps; 112-a central region;
113-edge splice area; 114-a transition region;
1111-a first LED lamp; 1112-second LED lamp.
Detailed Description
The embodiments of the present application will be described below with reference to the drawings. The terminology used in the description of the embodiments herein is for the purpose of describing particular embodiments herein only and is not intended to be limiting of the application. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Fig. 1 is a schematic flowchart of a method for compensating a splicing shadow of an LED display screen according to a first embodiment of the present application, and as shown in fig. 1, the method may include the following steps:
s110, detecting the brightness of the central area, the transition area and the edge splicing area of each backlight module of the LED display screen under different test currents.
The LED display screen can be formed by splicing a plurality of backlight modules, a gap is formed at the spliced part, and the distance between the edge splicing area and the gap is smaller than or equal to the set distance. Specifically, the LED lamps on the backlight module can be arranged in an array, the edge splicing region can include one or more rows of LED lamps closest to the splicing seam on the backlight module, the corresponding transition region can include one or more rows of LED lamps closest to the edge splicing region on the backlight module, the edge splicing region is used as a region formed by one row of LED lamps closest to the splicing seam on the backlight module, the transition region is used as an example of a region formed by one row of LED lamps closest to the edge splicing region on the backlight module, and exemplary description is performed.
The LED display screen can be formed by splicing a plurality of LED backlight modules, different test currents can be switched on for the LED display screen at each time, and when the LED display screen is switched on for the test currents at each time, the currents of the backlight modules can be equal to the test currents so as to facilitate detection. For example, 1mA, 2mA and … … 15mA test currents are respectively conducted on the LED display screen, when the LED display screen is conducted with the 1mA test current, the current of each backlight module of the LED display screen is also 1mA, when the LED display screen is conducted with the 2mA test current, the current of each backlight module of the LED display screen is also 2mA, and when the LED display screen is conducted with different test currents, the brightness of the central area, the transition area and the edge splicing area of each backlight module is respectively detected.
When the LED display screen uses the dynamic partitioning technology as the backlight source, the working currents of the backlight modules may be different, so that the brightness of the central area, the transition area and the edge splicing area of each backlight module can be respectively detected under the condition that the testing currents among the backlight modules are different.
For example, the LED display screen is formed by splicing 4 backlight modules, wherein the backlight module 2 is respectively spliced with the backlight module 1 and the backlight module 3, and the backlight module 3 is further spliced with the backlight module 4. Different test currents can be respectively conducted to the backlight module 1 and the backlight module 2, and the brightness of the central area, the transition area and the edge splicing area of the backlight module 1 and the backlight module 2 can be detected; similarly, different test currents can be respectively conducted to the backlight module 2 and the backlight module 3, and the backlight module 3 and the backlight module 4, and the brightness of the central area, the transition area and the edge splicing area of the backlight module 1 and the backlight module 2 can be detected.
S120, determining a first current compensation relation of each first LED lamp according to the brightness of the central area and the brightness of the edge splicing area of each backlight module.
The first LED lamp may be an LED lamp in an edge splicing region of each backlight module, and the first current compensation relationship may be used to indicate a compensation current of the first LED lamp at different operating currents. The first current compensation relationship may include a plurality of operating current intervals, and each operating current interval may correspond to one compensation current.
Specifically, the brightness difference between the central area and the edge splicing area of each backlight module can be calculated according to the brightness of the central area and the edge splicing area of each backlight module, and the current to be compensated for by the first LED lamp in the edge splicing area of each corresponding backlight module is determined according to each brightness difference; and then determining a first current compensation relation of each first LED lamp according to the current of each first LED lamp needing to be compensated under different test currents.
In the following, an example of one of the backlight modules in the LED display screen is given as an example.
If the backlight module is connected with test currents of 1mA, 2mA and … … 15mA, and the currents to be compensated for the first LED lamp of the backlight module are determined to be 0.1mA, 0.2mA and … … 1.5.5 mA respectively according to the brightness difference between the central area and the edge splicing area, the first current compensation relationship of the first LED lamp of the backlight module can be shown in table 1:
TABLE 1
| Interval of operating current | Compensating current |
| 0.5mA-1.5mA | 0.1mA |
| 1.5mA-2.5mA | 0.2mA |
| 2.5mA-3.5mA | 0.3mA |
| 3.5mA-4.5mA | 0.4mA |
| …… | …… |
| 12.5mA-13.5mA | 1.3mA |
| 13.5mA-14.5mA | 1.4mA |
| 14.5mA-15mA | 1.5mA |
S130, determining a second current compensation relation of each second LED lamp according to the brightness of the central area and the brightness of the transition area of each backlight module.
The second LED lamp may be an LED lamp of a transition region of each backlight module, and the second current compensation relationship may be used to indicate a compensation current of the second LED lamp at different operating currents. The second current compensation relationship may include a plurality of operating current intervals, and each operating current interval may correspond to one compensation current.
Specifically, the brightness difference between the central area and the transition area of each backlight module can be calculated according to the brightness of the central area and the transition area of each backlight module, and the current required to be compensated by the second LED lamp in the transition area of each corresponding backlight module can be determined according to each brightness difference; and then determining a second current compensation relation of each second LED lamp according to the current required to be compensated of each second LED lamp under different test currents.
In the following, an example of one of the backlight modules in the LED display screen is given as an example.
If the backlight module is turned on with test currents of 1mA, 2mA and … … 15mA, and the currents to be compensated for the second LED lamp of the backlight module are determined to be 0.05mA, 0.1mA and … … 0.75.75 mA respectively according to the brightness difference between the central region and the transition region, the second current compensation relationship of the second LED lamp of the backlight module can be shown in table 2:
TABLE 2
| Interval of operating current | Compensating current |
| 0.5mA-1.5mA | 0.05mA |
| 1.5mA-2.5mA | 0.1mA |
| 2.5mA-3.5mA | 0.15mA |
| 3.5mA-4.5mA | 0.2mA |
| …… | …… |
| 12.5mA-13.5mA | 0.65mA |
| 13.5mA-14.5mA | 0.7mA |
| 14.5mA-15mA | 0.75mA |
In addition, the edge splicing area may also be an outermost area of the LED display screen, for example, the LED display screen has only one backlight module, and the edge splicing area may be an outermost area of the backlight module, or the LED display screen is formed by splicing a plurality of backlight modules, and the edge splicing area may be an outermost area of the whole formed by splicing a plurality of backlight modules.
Therefore, the different brightness of the central area and the outermost area of each backlight module of the LED display screen under different test currents can be detected, and the current of the LED lamp in the outermost area is further adjusted, so that the brightness of the outermost area and the brightness of the central area are approximately consistent. The implementation principle is similar to the above method, and is not described herein again.
It will be appreciated by those skilled in the art that the above embodiments are exemplary and not intended to limit the present application. Where possible, the order of execution of one or more of the above steps may be adjusted, or may be selectively combined, to arrive at one or more of the first embodiments. The skilled person can select any combination of the above steps according to the needs, and all that does not depart from the essence of the scheme of the present application falls into the protection scope of the present application.
According to the screen shadow compensation scheme provided by the embodiment of the application, the brightness of the central area and the brightness of the edge splicing area of each backlight module of the LED display screen under different test currents are detected; and then determining a first current compensation relation of each first LED lamp according to the brightness of the central area and the brightness of the edge splicing area of each backlight module, wherein the first current compensation relation is used for indicating the compensation current of the first LED lamp under different working currents, and the first LED lamp is the LED lamp of the edge splicing area of each backlight module. According to the scheme, when the LED display screen works, the compensation current of each first LED lamp is determined according to the working current of each first LED lamp and the first current compensation relation, and the current of each first LED lamp is adjusted according to each compensation current, so that the brightness of the edge splicing area of each backlight module is approximately consistent with the brightness of the central area, the shadow at the splicing position of the LED backlight module in the backlight process is weakened, and the influence of the shadow on the display effect is weakened.
Based on the same inventive concept, the embodiment of the application also provides the electronic equipment. Fig. 2 is a schematic structural diagram of an electronic device according to a first embodiment of the present application, and as shown in fig. 2, the electronic device according to the first embodiment may include: a memory 210 and a processor 220, the memory 210 for storing computer programs; the processor 220 is adapted to perform the method according to the above-described method embodiments when invoking the computer program.
The electronic device provided by this embodiment may perform the above method embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.
Based on the same inventive concept, the embodiment of the present application further provides an LED display screen, and when the LED display screen is in operation, the compensation current of each first LED lamp can be determined according to the working current of each first LED lamp and the first current compensation relationship determined in the above method embodiment, and the current of each first LED lamp is adjusted according to each compensation current, so that the brightness of the edge splicing area of each backlight module is approximately consistent with the brightness of the central area, thereby weakening the shadow at the splicing position of the LED backlight module during backlight and weakening the influence of the shadow on the display effect.
Fig. 3 is a schematic structural diagram of an LED display screen according to a first embodiment of the present application, and as shown in fig. 3, the LED display screen according to the first embodiment may include: a backlight assembly 1 and an edge light panel controller 2.
The backlight assembly 1 may comprise a plurality of backlight modules 11 spliced together. Fig. 4 is a schematic structural diagram of a backlight module 11 according to a first embodiment of the present disclosure, and as shown in fig. 4, the LED lamps 111 on each backlight module 11 may be arranged in an array, and each backlight module 11 may have a central region 112 and an edge splicing region 113. The edge splicing region 113 may include a row of LED lamps 111 on the backlight module 11 closest to the splicing seam.
It is understood that the edge splicing region 113 may also include a plurality of rows of LED lamps 111 on the backlight module 11 closest to the splicing seam.
The edge lamp panel controller 2 may be configured to determine a first compensation current of each first LED lamp 1111 according to a working current of each first LED lamp 1111 and a first current compensation relationship; and adjusts the current of each first LED lamp 1111 according to each first compensation current. The first LED lamps 1111 are LED lamps 111 in the edge splicing regions 113 of the backlight modules 11.
The edge lamp panel controller 2 can respectively control the first LED lamps 1111 of the different backlight modules 11 to perform current compensation according to the working currents of the different backlight modules 11.
The following description will take one of the backlight modules 11 in the LED display panel as an example.
Edge lamp plate controller 2 can determine the operating current of this backlight unit 11's first LED lamp 1111 earlier, and the operating current interval that corresponds in the first current compensation of this first LED lamp 1111 closes, then determines the compensating current that this operating current interval corresponds as the first compensating current of this first LED lamp 1111 to according to the current of this first compensating current adjustment this first LED lamp 1111.
In order to adjust the brightness of the LED lamps 111 on each backlight module 11 more accurately and make the overall brightness of the LED display screen more consistent, the LED display screen may further include a transition lamp panel controller 3, and correspondingly, there is a transition area 114 on each backlight module 11.
The transition lamp panel controller 3 is configured to determine a second compensation current of each second LED lamp 1112 according to a working current and a second current compensation relationship of each second LED lamp 1112; and adjusts the current of each second LED lamp 1112 according to each second compensation current. The second LED lamps 1112 are the LED lamps 111 in the transition region 114 of each backlight module 11, and the second current compensation relationship is determined according to the above method embodiment.
The transition lamp panel controller 3 can respectively control the second LED lamps 1112 of different backlight modules 11 to perform current compensation according to the working currents of different backlight modules 11.
The following description will exemplarily describe one of the backlight modules 11 in the LED display screen.
The transition lamp panel controller 3 may determine the working current of the second LED lamp 1112 of the backlight module 11, determine a corresponding working current interval in the second current compensation switch of the second LED lamp 1112, determine the compensation current corresponding to the working current interval as the second compensation current of the second LED lamp 1112, and adjust the current of the second LED lamp 1112 according to the second compensation current.
Fig. 5 is a schematic structural diagram of a backlight module 11 according to a second embodiment of the present disclosure, as shown in fig. 5, a transition region 114 of each backlight module 11 is located between a central region 112 and an edge splicing region 113 of the backlight module 11, and the transition region 114 may include a row of LED lamps 111 on the backlight module 11 closest to the edge splicing region 113.
It is understood that the transition region 114 may also include the rows of LED lamps 111 on the backlight module 11 closest to the edge splicing region 113.
The brightness of the LED lamp 111 in the edge splicing region 113 is increased after the current compensation, which may affect the brightness of the adjacent transition region 114, so that the brightness of the transition region 114 is higher than that of the central region 112. In view of the above, the third embodiment of the present disclosure provides a backlight module to reduce the influence of the current compensation of the LED lamps 111 in the edge splicing region 113 on the adjacent transition region 114.
Fig. 6 is a schematic structural diagram of a backlight module 11 according to a third embodiment of the present disclosure, and as shown in fig. 6, each backlight module 11 may have a central region 112 and an edge splicing region 113. The LED lamps 111 of the central region 112 of each backlight module 11 may be arranged in an array. The edge splicing area 113 may include a row of LED lamps 111 on the backlight module 11 closest to the splicing seam. The LED lamps 111 of the edge splicing region 113 and the LED lamps 111 of the central region 112 are arranged in a staggered manner, that is, in the length direction of the splicing seam, the LED lamps 111 of the edge splicing region 113 are located between the LED lamps 111 of the central region 112, so that the LED lamps 111 of the edge splicing region 113 mainly irradiate the gaps between the LED lamps 111 of the adjacent transition regions 114, thereby locally weakening the influence on the adjacent transition regions 114, and the number of the rows of LED lamps 111 of the edge splicing region 113 is less than that of the rows of LED lamps 111 of other regions, thereby weakening the shadow at the splicing position and weakening the influence on the adjacent transition regions 114 as a whole.
Embodiments of the present application further provide a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the computer program implements the method described in the above method embodiments.
The embodiment of the present application further provides a computer program product, which when running on an electronic device, enables the electronic device to implement the method described in the above method embodiment when executed.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or a first programmable device. The computer instructions may be stored in or transmitted over a computer-readable storage medium. The computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optics, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy Disk, a hard Disk, or a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.
Those skilled in the art can understand that all or part of the processes in the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer readable storage medium and can include the processes of the method embodiments described above when executed. And the aforementioned storage medium may include: various media capable of storing program codes, such as ROM or RAM, magnetic or optical disks, etc.
The naming or numbering of the steps appearing in the present application does not mean that the steps in the method flow must be executed in the chronological/logical order indicated by the naming or numbering, and the named or numbered flow steps may be changed in execution order according to the technical purpose to be achieved, as long as the same or similar technical effects are achieved.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/device and method may be implemented in other ways. For example, the above-described apparatus/device embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
In the description of the present application, a "/" indicates a relationship in which the objects associated before and after are an "or", for example, a/B may indicate a or B; in the present application, "and/or" is only an association relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural.
Also, in the description of the present application, "a plurality" means two or more than two unless otherwise specified. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, at least one of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to" determining "or" in response to detecting ". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
Furthermore, in the description of the present application and the appended claims, the terms "first," "second," "third," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be implemented in other sequences than those illustrated or described herein.
Reference throughout this specification to "one embodiment" or "some embodiments," or the like, described with reference to "one embodiment" or "some embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in a first embodiment," "in another embodiment," and the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather mean "one or more, but not all embodiments" unless specifically stated otherwise in the first aspect.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A method for compensating a screen shadow, comprising:
detecting the brightness of the central area and the edge splicing area of each backlight module of the LED display screen under different test currents;
determining a first current compensation relation of each first LED lamp according to the brightness of the central area and the brightness of the edge splicing area of each backlight module, wherein the first current compensation relation is used for indicating the compensation current of the first LED lamp under different working currents, and the first LED lamp is the LED lamp of the edge splicing area of each backlight module.
2. The method of claim 1, wherein the first current compensation relationship comprises a plurality of operating current intervals, each operating current interval corresponding to a compensation current;
the first compensation current of each first LED lamp is the compensation current corresponding to the working current interval where the working current of the first LED lamp is located in the first current compensation relation of the first LED lamp.
3. The method of claim 1, further comprising:
detecting the brightness of a transition area of each backlight module of the LED display screen under different test currents, wherein the transition area of each backlight module is positioned between the central area and the edge splicing area of the backlight module;
and determining a second current compensation relationship of each second LED lamp according to the brightness of the central area and the brightness of the transition area of each backlight module, wherein the second current compensation relationship is used for indicating the compensation current of the second LED lamp under different working currents, and the second LED lamp is the LED lamp in the transition area of each backlight module.
4. The method of claim 3, wherein the second current compensation relationship comprises a plurality of operating current intervals, each operating current interval corresponding to a compensation current;
and the second compensation current of each second LED lamp is the compensation current corresponding to the working current interval in which the working current of the second LED lamp is located in the second current compensation relation of the second LED lamp.
5. The method according to claim 1, wherein the testing current of each backlight module is the same at each detection.
6. The method of claim 1, wherein the LED display screen is formed by splicing a plurality of backlight modules, a gap is formed at the spliced position, and the distance between the edge splicing area and the gap is smaller than or equal to a set distance.
7. The method according to any one of claims 1-6, wherein the LED lamp arrays on each backlight module are arranged, and the edge splicing region of each backlight module comprises: and the backlight module is provided with a row of LED lamps which are closest to the splicing seams.
8. An LED display screen is characterized by comprising a backlight module and an edge lamp panel controller;
the edge lamp panel controller is used for determining a first compensation current of each first LED lamp according to the working current of each first LED lamp and a first current compensation relation; and adjusting the current of each first LED lamp according to each first compensation current, wherein the first LED lamp is an LED lamp in an edge splicing area of each backlight module, and the first current compensation relationship is determined by using the method according to any one of claims 1 to 7.
9. The LED display screen of claim 8, further comprising a transition lamp panel controller, wherein the transition lamp panel controller is configured to determine a second compensation current for each second LED lamp according to a second current compensation relationship with a working current of each second LED lamp; and adjusting the current of each second LED lamp according to each second compensation current, wherein the second LED lamp is an LED lamp in a transition region of each backlight module, the second current compensation relationship is determined by the method according to any one of claims 1 to 7, and the transition region of each backlight module is located between a center region and an edge splicing region of the backlight module.
10. The LED display screen of claim 8, wherein the LED lamp arrays on each backlight module are arranged, and the edge splicing area of each backlight module comprises: and the backlight module is provided with a row of LED lamps which are closest to the splicing seams.
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| CN202210421367.5A CN114648965A (en) | 2022-04-21 | 2022-04-21 | Screen shadow compensation method and backlight module |
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Application publication date: 20220621 |