CN109119033B - Backlight compensation method, device, system and storage medium - Google Patents
Backlight compensation method, device, system and storage medium Download PDFInfo
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- CN109119033B CN109119033B CN201811210458.4A CN201811210458A CN109119033B CN 109119033 B CN109119033 B CN 109119033B CN 201811210458 A CN201811210458 A CN 201811210458A CN 109119033 B CN109119033 B CN 109119033B
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- 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
- 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
- G09G3/3406—Control of illumination source
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Abstract
The invention discloses a backlight compensation method, a device, a system and a storage medium, wherein the method comprises the following steps: acquiring position information of a current lamp area, and determining a partition type of the current lamp area according to the position information; acquiring the backlight brightness value of the adjacent lamp area of the current lamp area according to the position information and the partition type; calculating to obtain a compensation backlight brightness value of the current lamp zone based on a preset brightness compensation algorithm and the backlight brightness value of the adjacent lamp zone of the current lamp zone; and performing backlight compensation on the current lamp area based on the compensated backlight brightness value. The invention realizes backlight compensation of bright blocks in dark areas automatically, and improves the phenomenon of uneven brightness.
Description
Technical Field
The invention relates to the technical field of liquid crystal display screens, in particular to a backlight compensation method, device and system and a storage medium.
Background
With the development of science and technology and the continuous improvement of the living standard of people, the liquid crystal display screen becomes the mainstream technology of flat panel display due to the reasons of low power consumption, light weight, gorgeous color and the like, and is widely applied to electronic products of daily consumption. Since the lcd does not emit light, a backlight source needs to be installed behind the lcd panel, and the effect of the video image is adjusted by the probability of the transmitted light of the liquid crystal unit, so as to achieve the image of the dynamic scene to be displayed.
However, most of the current tv sets with Local Dimming (Local backlight adjusting) technology have their Local Dimming algorithm supported by SOC (System-on-a-Chip main control Chip) supplier or third party, and the curing is not easy to update. Some scenes in a television program are not well adapted to a Local Dimming algorithm, for example, a moving bright block like a torch moving in the dark can be suddenly turned on and off when moving, and the front and rear edges are not clear due to insufficient backlight, and especially when the number of backlight partitions is small, the distance between lamps is large, so that the Local Dimming algorithm is more obvious. When the bright block moves to the position of the backlight lamp, the bright block is brighter, and when the bright block moves between two lamps, the bright block is darker, and the change is more obvious the faster the moving speed is. This is due to the fact that the backlight is always delayed by one field sync (VSYNC vertical sync) period.
Disclosure of Invention
The invention mainly aims to provide a backlight compensation method, equipment, a system and a storage medium, aiming at realizing the purpose of improving the phenomenon of uneven brightness by automatically performing backlight compensation on bright blocks in a dark area.
In order to achieve the above object, the present invention provides a backlight compensation method applied to a display device provided with a plurality of lamp regions, the backlight compensation method comprising the steps of:
acquiring position information of a current lamp area, and determining a partition type of the current lamp area according to the position information;
acquiring the backlight brightness value of the adjacent lamp area of the current lamp area according to the position information and the partition type;
calculating to obtain a compensation backlight brightness value of the current lamp zone based on a preset brightness compensation algorithm and the backlight brightness value of the adjacent lamp zone of the current lamp zone;
and performing backlight compensation on the current lamp area based on the compensated backlight brightness value.
Optionally, when the partition type is an angle partition, a lamp area within an angle partition range is provided with three adjacent lamp areas, and the step of obtaining the backlight brightness value of the adjacent lamp area of the current lamp area according to the position information and the lamp area type includes:
acquiring backlight brightness values of three adjacent lamp areas of the current lamp area within the angular division range according to the position information;
the step of calculating the compensated backlight brightness value of the current lamp zone based on a preset brightness compensation algorithm and the backlight brightness values of the adjacent lamp zones of the current lamp zone comprises the following steps:
calculating an angular average value of the backlight brightness values of the three adjacent lamp areas as an angular subarea average value;
and multiplying the average value of the angular division by a preset brightness compensation coefficient to obtain a compensation backlight brightness value of the current lamp area.
Optionally, when the partition type is a side partition, the lamp area within the side partition range is provided with five adjacent lamp areas, and the step of obtaining the backlight brightness value of the adjacent lamp area of the current lamp area according to the position information and the lamp area type includes:
acquiring backlight brightness values of five adjacent lamp areas of the current lamp area within the edge partition range according to the position information;
the step of calculating the compensated backlight brightness value of the current lamp zone based on a preset brightness compensation algorithm and the backlight brightness values of the adjacent lamp zones of the current lamp zone comprises the following steps:
calculating the average value of the backlight brightness values of the five adjacent lamp areas as the average value of the edge areas;
and multiplying the average value of the edge partition by a preset brightness compensation coefficient to obtain a compensation backlight brightness value of the current lamp area.
Optionally, when the lamp zone type is a middle zone, eight adjacent lamp zones are provided for the lamp zone within the middle zone range, and the step of obtaining the backlight brightness value of the adjacent lamp zone of the current lamp zone according to the position information and the lamp zone type includes:
acquiring backlight brightness values of eight adjacent lamp areas of the current lamp area within the middle partition range according to the position information;
the step of calculating the compensated backlight brightness value of the current lamp zone based on a preset brightness compensation algorithm and the backlight brightness values of the adjacent lamp zones of the current lamp zone comprises the following steps:
calculating the average value of the backlight brightness values of the eight adjacent lamp areas as the average value of the middle subarea;
and multiplying the average value of the middle subarea by a preset brightness compensation coefficient to obtain a compensation backlight brightness value of the current lamp area.
Optionally, the step of obtaining the position information of the current lamp zone and determining the lamp zone type of the lamp zone according to the position information further includes:
acquiring a backlight brightness value of the current lamp area;
judging whether the backlight brightness value is smaller than a preset backlight brightness threshold value or not;
if the backlight brightness value is smaller than a preset backlight brightness threshold value, executing the following steps: and acquiring the position information of the current lamp area, and determining the partition type of the current lamp area according to the position information.
Optionally, the step of performing backlight compensation on the current lamp zone based on the compensated backlight brightness value includes:
adding the backlight brightness value of the current lamp zone and the compensation backlight brightness value to obtain a corrected backlight brightness value;
and controlling the current lamp area to output according to the corrected backlight brightness value.
The invention also provides a display device, which comprises an information acquisition module, a brightness acquisition module, a calculation module and a compensation module, wherein:
the information acquisition module is used for acquiring the position information of the current lamp area and determining the partition type of the current lamp area according to the position information;
the brightness obtaining module is used for obtaining the backlight brightness value of the adjacent lamp area of the current lamp area according to the position information and the partition type;
the calculation module is used for calculating a compensation backlight brightness value of the current lamp area based on a preset brightness compensation algorithm and the backlight brightness value of the adjacent lamp area of the current lamp area;
and the compensation module is used for carrying out backlight compensation on the current lamp area based on the compensation backlight brightness value.
In addition, to achieve the above object, the present invention also provides a backlight compensation system, including: a memory, a processor and a backlight compensation program stored on the memory and executable on the processor, the backlight compensation program when executed by the processor implementing the steps of the backlight compensation method as described above.
In addition, to achieve the above object, the present invention further provides a storage medium having a backlight compensation program stored thereon, which when executed by a processor implements the steps of the backlight compensation method as described above.
According to the backlight compensation method, the device, the system and the storage medium, the position information of the current lamp area is obtained, and the partition type of the current lamp area is determined according to the position information; acquiring the backlight brightness value of the adjacent lamp area of the current lamp area according to the position information and the partition type; calculating to obtain a compensation backlight brightness value of the current lamp zone based on a preset brightness compensation algorithm and the backlight brightness value of the adjacent lamp zone of the current lamp zone; and performing backlight compensation on the current lamp area based on the compensated backlight brightness value. The invention realizes backlight compensation of bright blocks in dark areas automatically, and improves the phenomenon of uneven brightness.
Drawings
Fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a functional block diagram of a display device according to the present invention;
FIG. 3 is a flowchart illustrating a backlight compensation method according to a first embodiment of the present invention;
FIG. 4 is a flowchart illustrating a backlight compensation method according to a second embodiment of the present invention;
FIG. 5 is a flowchart illustrating a backlight compensation method according to a third embodiment of the present invention;
FIG. 6 is a flowchart illustrating a backlight compensation method according to a fourth embodiment of the present invention;
FIG. 7 is a flowchart illustrating a backlight compensation method according to a fifth embodiment of the present invention.
The objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The main solution of the embodiment of the invention is as follows: acquiring position information of a current lamp area, and determining a partition type of the current lamp area according to the position information; acquiring the backlight brightness value of the adjacent lamp area of the current lamp area according to the position information and the partition type; calculating to obtain a compensation backlight brightness value of the current lamp zone based on a preset brightness compensation algorithm and the backlight brightness value of the adjacent lamp zone of the current lamp zone; and performing backlight compensation on the current lamp area based on the compensated backlight brightness value. The invention realizes backlight compensation of bright blocks in dark areas automatically, and improves the phenomenon of uneven brightness.
Since most of the prior art televisions with Local Dimming (Local backlight adjustment) technology have Local Dimming algorithm supported by SOC (System-on-a-Chip main control Chip) supplier or third party, and the curing is not easy to update. Some scenes in a television program are not well adapted to a Local Dimming algorithm, for example, a moving bright block like a torch moving in the dark can be suddenly turned on and off when moving, and the front and rear edges are not clear due to insufficient backlight, and especially when the number of backlight partitions is small, the distance between lamps is large, so that the Local Dimming algorithm is more obvious. When the bright block moves to the position of the backlight lamp, the bright block is brighter, and when the bright block moves between two lamps, the bright block is darker, and the change is more obvious the faster the moving speed is. This is due to the fact that the backlight is always delayed by one field sync (VSYNC vertical sync) period.
The embodiment of the invention provides a solution, which can realize automatic backlight compensation of bright blocks in dark areas.
As shown in fig. 1, fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present invention.
The terminal in the embodiment of the invention is display equipment.
As shown in fig. 1, the terminal may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
Optionally, the terminal may further include a camera, a Radio Frequency (RF) circuit, a sensor, an audio circuit, a WiFi module, and the like. Such as light sensors, motion sensors, and other sensors. Specifically, the light sensor may include an ambient light sensor that adjusts the brightness of the display screen according to the brightness of ambient light, and a proximity sensor that turns off the display screen and/or the backlight when the terminal device is moved to the ear. Of course, the terminal may also be configured with other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which are not described herein again.
Those skilled in the art will appreciate that the terminal structure shown in fig. 1 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a kind of computer storage medium, may include therein an operation terminal, a network communication module, a user interface module, and a backlight compensation program.
In the terminal shown in fig. 1, the network interface 1004 is mainly used for connecting to a backend server and performing data communication with the backend server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the processor 1001 may be configured to call the backlight compensation program stored in the memory 1005 and perform the following operations:
acquiring position information of a current lamp area, and determining a partition type of the current lamp area according to the position information;
acquiring the backlight brightness value of the adjacent lamp area of the current lamp area according to the position information and the partition type;
calculating to obtain a compensation backlight brightness value of the current lamp zone based on a preset brightness compensation algorithm and the backlight brightness value of the adjacent lamp zone of the current lamp zone;
and performing backlight compensation on the current lamp area based on the compensated backlight brightness value.
Further, the processor 1001 may call the backlight compensation program stored in the memory 1005, and further perform the following operations:
acquiring backlight brightness values of three adjacent lamp areas of the current lamp area within the angular division range according to the position information;
the step of calculating the compensated backlight brightness value of the current lamp zone based on a preset brightness compensation algorithm and the backlight brightness values of the adjacent lamp zones of the current lamp zone comprises the following steps:
calculating an angular average value of the backlight brightness values of the three adjacent lamp areas as an angular subarea average value;
and multiplying the average value of the angular division by a preset brightness compensation coefficient to obtain a compensation backlight brightness value of the current lamp area.
Further, the processor 1001 may call the backlight compensation program stored in the memory 1005, and further perform the following operations:
acquiring backlight brightness values of five adjacent lamp areas of the current lamp area within the edge partition range according to the position information;
calculating the average value of the backlight brightness values of the five adjacent lamp areas as the average value of the edge areas;
and multiplying the average value of the edge partition by a preset brightness compensation coefficient to obtain a compensation backlight brightness value of the current lamp area.
Further, the processor 1001 may call the backlight compensation program stored in the memory 1005, and further perform the following operations:
acquiring backlight brightness values of eight adjacent lamp areas of the current lamp area within the middle partition range according to the position information;
calculating the average value of the backlight brightness values of the eight adjacent lamp areas as the average value of the middle subarea;
and multiplying the average value of the middle subarea by a preset brightness compensation coefficient to obtain a compensation backlight brightness value of the current lamp area.
Further, the processor 1001 may call the backlight compensation program stored in the memory 1005, and further perform the following operations:
acquiring a backlight brightness value of the current lamp area;
judging whether the backlight brightness value is smaller than a preset backlight brightness threshold value or not;
if the backlight brightness value is smaller than a preset backlight brightness threshold value, executing the following steps: and acquiring the position information of the current lamp area, and determining the partition type of the current lamp area according to the position information.
Further, the processor 1001 may call the backlight compensation program stored in the memory 1005, and further perform the following operations:
adding the backlight brightness value of the current lamp zone and the compensation backlight brightness value to obtain a corrected backlight brightness value;
and controlling the current lamp area to output according to the corrected backlight brightness value.
In the technical solution provided by the present invention, the backlight compensation terminal calls the backlight compensation program stored in the memory 1005 through the processor 1001 to implement the steps of: acquiring position information of a current lamp area, and determining a partition type of the current lamp area according to the position information; acquiring the backlight brightness value of the adjacent lamp area of the current lamp area according to the position information and the partition type; calculating to obtain a compensation backlight brightness value of the current lamp zone based on a preset brightness compensation algorithm and the backlight brightness value of the adjacent lamp zone of the current lamp zone; and performing backlight compensation on the current lamp area based on the compensated backlight brightness value. The invention realizes backlight compensation of bright blocks in dark areas automatically, and improves the phenomenon of uneven brightness.
Referring to fig. 2, fig. 2 is a functional module diagram of a display device according to the present invention.
The present invention also provides a display apparatus, including:
the information acquisition module 10 is used for acquiring the position information of the current lamp area and determining the partition type of the current lamp area according to the position information;
the brightness obtaining module 20 obtains the backlight brightness value of the adjacent lamp zone of the current lamp zone according to the position information and the partition type;
the calculation module 30 calculates a compensation backlight brightness value of the current lamp zone based on a preset brightness compensation algorithm and the backlight brightness values of the adjacent lamp zones of the current lamp zone;
and the compensation module 40 is used for performing backlight compensation on the current lamp zone based on the compensated backlight brightness value.
The specific implementation of the display device of the present invention is substantially the same as the embodiments of the backlight compensation method, and will not be described herein again.
The present invention provides a storage medium storing one or more programs, the one or more programs being further executable by one or more processors for implementing the steps of the backlight compensation method of any of the above.
The specific implementation of the storage medium of the present invention is substantially the same as the embodiments of the backlight compensation method, and will not be described herein again.
Based on the hardware structure, the embodiment of the backlight compensation method is provided.
Referring to fig. 3, fig. 3 is a flowchart illustrating a backlight compensation method according to a first embodiment of the invention.
As shown in fig. 3, a first embodiment of the present invention provides a backlight compensation method, which is applied to a display device provided with a plurality of lamp regions, and the backlight compensation method includes the following steps:
step S1, acquiring the position information of the current lamp area, and determining the partition type of the current lamp area according to the position information;
it can be understood that the backlight compensation method provided by the invention is applicable to the technical field of liquid crystal display screens.
In this embodiment, the backlight partition of the display screen is divided into a corresponding number of lamp regions according to the number of light sources, each lamp region corresponds to one light source, the backlight partition is divided into different types of partitions, namely, a corner partition, an edge partition and a middle partition, according to the position of the lamp region, and each type of partition includes a plurality of lamp regions.
The display device obtains backlight brightness values of all the lamp areas from the main control chip, sequentially judges a brightness threshold of each lamp area, if the backlight brightness value of a certain lamp area is greater than or equal to a preset backlight brightness threshold value, backlight brightness compensation is not needed to be carried out on the lamp area, but if the backlight brightness value of a certain lamp area is less than the preset backlight brightness threshold value, backlight brightness compensation is needed to be carried out on the lamp area.
Specifically, to perform backlight brightness compensation on lamp zones smaller than a preset backlight brightness threshold value, the information acquisition module first acquires position information of the lamp zones smaller than the preset backlight brightness threshold value one by one, and determines the partition types to which the lamp zones belong according to the position information of the lamp zones.
Step S2, acquiring the backlight brightness value of the adjacent lamp area of the lamp area according to the position information and the lamp area type of the lamp area;
after the information acquisition module acquires the position information of the lamp area smaller than the preset backlight brightness threshold value and determines the partition type of the lamp area according to the position information of the lamp area, the brightness acquisition module acquires the backlight brightness value of the lamp area adjacent to the lamp area according to the position information of the lamp area and the partition type of the lamp area.
When the partition type of the lamp area is the angle partition, the angle partition is positioned at four corners of the backlight partition, and the four lamp areas are the upper left corner lamp area, the upper right corner lamp area, the lower left corner lamp area and the lower right corner lamp area. Since each of the four lamp zones within the angular division range has three adjacent different lamp zones, it is necessary to specifically determine which lamp zone is one of the angular lamp zones according to the specific position information of the lamp zone, and then obtain the backlight brightness values of the three adjacent lamp zones.
When the partition type of the lamp area is edge partition, the edge partition is positioned on four edges of the backlight partition, but does not include the corner lamp area on the edge, and the edge partition comprises a left edge partition, a right edge partition, a top edge partition and a bottom edge partition. Since each of the four side partitions within the range of the side partition has five adjacent different lamp regions, it is necessary to specifically determine which of the side lamp regions is the lamp region according to the specific position information of the lamp region, and then obtain the backlight brightness values of the five adjacent lamp regions.
When the partition type of the lamp area is the middle partition, the middle partition is located in the middle of the backlight partition, and is all the lamp areas except the corner partition and the edge partition. Since each lamp zone in the middle partition range has eight adjacent different lamp zones, it is necessary to specifically determine which lamp zone is one of the side lamp zones according to the specific position information of the lamp zone, and then obtain the backlight brightness values of the eight lamp zones adjacent to the lamp zone.
The light block includes one or more light zones, and the light block may also include a plurality of sub-zones.
Step S3, calculating to obtain a compensation backlight brightness value of the current lamp zone based on a preset brightness compensation algorithm and the backlight brightness values of the adjacent lamp zones of the current lamp zone;
after the brightness obtaining module obtains the backlight brightness value of the lamp zone adjacent to the lamp zone, the backlight brightness value of the adjacent lamp zone is calculated by using a preset brightness compensation algorithm, and the compensated backlight brightness value of the lamp zone is obtained.
Specifically, after the brightness obtaining module obtains the backlight brightness values of the adjacent lamp zones to the lamp zone, the calculating module calculates the average value of the backlight brightness values of the adjacent lamp zones, and multiplies the obtained average value by a preset brightness compensation coefficient to obtain the compensated backlight brightness value of the lamp zone.
The preset brightness compensation coefficient is larger than zero and less than or equal to one.
And step S4, performing backlight compensation on the current lamp area based on the compensated backlight brightness value.
After the calculation module obtains the compensation backlight brightness value of the lamp area, the compensation module performs backlight compensation on the current lamp area based on the compensation backlight brightness value.
Specifically, after the calculation module obtains the compensation backlight brightness value for the lamp zone, the compensation module superimposes the backlight brightness value of the lamp zone with the compensation backlight brightness value to obtain a corrected backlight brightness value, and then controls the lamp zone to output light with brightness corresponding to the corrected backlight brightness value.
The above partition type and partition mode are only preferred embodiments of the present invention, and are not intended to limit the present invention, the present invention may also partition the backlight source in other manners, and is not limited to the manner of partitioning the backlight into three partitions, the number of adjacent lamp zones obtained in the averaging process of the present invention is not limited to three adjacent lamp zones of the corner lamp zone, five adjacent lamp zones of the side lamp zone, and eight adjacent lamp zones of the middle lamp zone, the corner lamp zone may also obtain backlight brightness values of 1, 2, 3, 4, or more adjacent lamp zones, the side lamp zone may also obtain backlight brightness values of 1, 2, 3, 4, or more adjacent lamp zones, and the middle lamp zone may also obtain backlight brightness values of 1 to 7 adjacent lamp zones, or more. Any modification, equivalent replacement, and improvement within the spirit of the principles of the present invention should be included in the scope of the present invention.
By the backlight compensation method provided by the embodiment, backlight compensation is automatically performed on the bright blocks in the dark area, and the phenomenon of uneven brightness is improved.
Further, as shown in fig. 4, a second embodiment of the backlight compensation method according to the present invention is proposed based on the first embodiment shown in fig. 3, in this embodiment, when the partition type is an angular partition, a lamp zone within an angular partition range is provided with three adjacent lamp zones, and the step of obtaining the backlight brightness values of the adjacent lamp zones of the current lamp zone according to the position information and the lamp zone types includes:
step S21, acquiring backlight brightness values of three adjacent lamp areas of the current lamp area within the angular division range according to the position information;
the backlight subarea is divided into three different types of subareas according to the positions of the lamp areas, namely a corner subarea, an edge subarea and a middle subarea, and each type of subarea comprises a plurality of lamp areas.
When the partition type of the lamp area where the current lamp area is located is the angle partition, the angle partition is located at four corners of the backlight partition, and four lamp areas are totally arranged, namely an upper left corner lamp area, an upper right corner lamp area, a lower left corner lamp area and a lower right corner lamp area. Since each of the four lamp zones within the angular division range has three adjacent different lamp zones, it is necessary to specifically determine which lamp zone is one of the angular lamp zones according to the specific position information of the lamp zone, and then obtain the backlight brightness values of the three adjacent lamp zones.
For example: if a coordinate system is established for the entire backlight partition, and the backlight partition is set as row ROWS column, the coordinates of the lamp zones at the 4 corners are numbered, upper left corner S (0, 0), upper right corner S (0, COLUMNS-1), lower left corner S (ROWS-1, 0), lower right corner S (ROWS-1, COLUMNS-1), where 3 lamps are adjacent to each other, the coordinates of the adjacent lamps at the upper left corner are S (0, 1), S (1, 0), S (1, 1), the coordinates of the adjacent lamps at the upper right corner are S (0, COLUMNS-2), S (1, COLUMNS-2), S (1, COLUMNS-1), the coordinates of the adjacent lamps at the lower left corner are S (ROWS-1, 1), S (ROWS-2, 0), S (ROWS-2, 1), the coordinates of the adjacent lamps at the lower right corner are S (ROWS-1, COLNS-2), S (ROWS-2, COLUMNS-2), S (ROWS-2, COLUMNS-1), if the current lamp zone is located in the upper left lamp zone, its coordinate is S (0, 0), the backlight brightness values of three adjacent lamp zones are L (S (0, 1)), L (S (1, 0)), L (S (1, 1)), if the current lamp zone is located in the upper right lamp zone, its coordinate is S (0, COLUMNS-1), the backlight brightness values of three adjacent lamp zones are L (S (0, COLUMNS-2)), L (S (1, COLUMNS-2)), L (S (1, COLUMNS-1)), if the current lamp zone is located in the lower left lamp zone, its coordinate is S (ROWS-1, 0), the backlight brightness values of three adjacent lamp zones are L (ROWS-1, 1)), L (S (ROWS-2, 0)), L (ROWS-2, 1) and if the current lamp area is located in the lower right corner lamp area, the coordinate is S (row-1, column-1), and the backlight brightness values of three adjacent lamp areas are L (S (row-1, column-2)), L (S (row-2, column-2)), and L (S (row-2, column-1)).
Further, the step of calculating the compensated backlight brightness value of the current lamp zone based on a preset brightness compensation algorithm and the backlight brightness values of the adjacent lamp zones of the current lamp zone comprises:
step S31, calculating the angular average value of the backlight brightness values of the three adjacent lamp areas as the angular divisional average value;
for example: if the current lamp zone is located in the upper left corner lamp zone, the average value of the backlight brightness values of the three adjacent lamp zones is ((L (S (0, 1)) + L (S (1, 0)) + L (S (1, 1)))/3), if the current lamp zone is located in the upper right corner lamp zone, the average value of the backlight brightness values of the three adjacent lamp zones is ((L (S (0, COLUMNS-2)) + L (S (1, COLUMNS-2)) + L (S (1, COLUMNS-1)))/3), if the current lamp zone is located in the lower left corner lamp zone, the average value of the backlight brightness values of the three adjacent lamp zones is ((L (ROWS-1, 1)) + L (S (ROWS-2, 0)) + L (S (ROWS-2, 1)))/3), if the current lamp zone is located in the lower right corner lamp zone, the average value of the backlight brightness values of the three adjacent lamp zones is ((L (S (ROWS-2, 1))/3), COLUMNS-2)) + L (S (ROWS-1, COLUMNS-2)) + L (S (ROWS-2, COLUMNS-1)))/3.
And step S32, multiplying the average value by a preset brightness compensation coefficient to obtain the compensation backlight brightness value of the current lamp zone.
And multiplying the average value of the backlight brightness values of the three adjacent lamp areas by a preset brightness compensation coefficient K to obtain the compensated backlight brightness value of the lamp area.
For example: the compensated backlight brightness value L (S (0, 0)) ═ K ((L (S (0, 1)) + L (S (1, 0)) + L (S (1, 1)))/3) of the upper left corner lamp zone; the compensated backlight brightness value L (S (0, column-1)) = ((L (S (0, column-2)) + L (S (1, column-1)))/3) × K for the upper right lamp zone; the compensated backlight brightness value L (S (row-1, 0)) = ((L (S (row-1, 1)) + L (S (row-2, 0)) + L (S (row-2, 1)))/3) × K for the lower left corner lamp zone; the compensated backlight brightness value L (S (row-1, column-1)) ((L (S (row-2, column-2)) + L (S (row-1, column-2)) + L (S (row-2, column-1)))/3) × K in the upper right lamp zone.
By the backlight compensation method provided by the embodiment, the compensation backlight brightness value of the lamp area in the angular division range is obtained through calculation by obtaining the backlight brightness values of three adjacent lamp areas of the lamp area in the angular division range.
Further, as shown in fig. 5, a third embodiment of the backlight compensation method according to the present invention is proposed based on the first embodiment shown in fig. 3, in this embodiment, when the partition type is a side partition, a lamp zone within a range of the side partition is provided with five adjacent lamp zones, and the step of obtaining the backlight brightness values of the adjacent lamp zones of the current lamp zone according to the position information and the lamp zone types includes:
step S22, acquiring backlight brightness values of five adjacent lamp areas of the current lamp area within the edge partition range according to the position information;
when the type of the partition of the lamp zone where the current lamp zone is located is the edge partition, the edge partition is located on four edges of the backlight partition, but the corner lamp zone located on the edge is not included, and the edge partition comprises a left edge partition, a right edge partition, a top edge partition and a bottom edge partition. Since each of the four side partitions within the range of the side partition has five adjacent different lamp regions, it is necessary to specifically determine which of the side lamp regions is the lamp region according to the specific position information of the lamp region, and then obtain the backlight brightness values of the five adjacent lamp regions.
For example: the top edge partition coordinates are numbered as: s (0, 1) to S (0, COLUMNS-2), there are 5 adjacent lamp zones, and the coordinate number of any lamp zone on the top side partition is S (0, j), 0< j < COLUMNS-1, and j is an integer, then the backlight brightness value of the adjacent lamp zone is L (S (0, j-1)), L (S (0, j +1)), L (S (1, j-1)), L (S (1, j)), L (S (1, j +1)) in turn.
The left, right and bottom partitions are similar to the top partition and will not be described further herein.
Further, the step of calculating the compensated backlight brightness value of the current lamp zone based on a preset brightness compensation algorithm and the backlight brightness values of the adjacent lamp zones of the current lamp zone comprises:
step S33, calculating the average value of the backlight brightness values of the five adjacent lamp areas as the average value of the edge partition;
for example: if the current lamp zone is located in the top edge partition, the average value of the backlight brightness values of five adjacent lamp zones ═ ((L (S (0, j-1)) + L (S (0, j +1)) + L (S (1, j-1)) + L (S (1, j) +) L (S (1, j + 1)))/5.
And step S34, multiplying the average value by a preset brightness compensation coefficient to obtain the compensation backlight brightness value of the current lamp zone.
And multiplying the average value of the backlight brightness values of the five adjacent lamp areas by a preset brightness compensation coefficient K to obtain the compensated backlight brightness value of the lamp area.
For example: l (S (0, j)) = ((L (S (0, j-1)) + L (S (0, j +1)) + L (S (1, j-1)) + L (S (1, j) +) L (S (1, j +1)))/5) × K.
By the backlight compensation method provided by the embodiment, the compensation backlight brightness value of the lamp area in the edge partition range is obtained by calculating the backlight brightness values of five adjacent lamp areas of the lamp area in the edge partition range.
Further, as shown in fig. 6, a fourth embodiment of the backlight compensation method according to the present invention is proposed based on the first embodiment shown in fig. 3, in this embodiment, when the lamp zone type is a middle partition, eight adjacent lamp zones are provided for the lamp zone within the middle partition range, and the step of obtaining the backlight brightness values of the adjacent lamp zones of the current lamp zone according to the position information and the lamp zone type includes:
step S23, acquiring backlight brightness values of eight adjacent lamp areas of the current lamp area within the middle partition range according to the position information;
when the partition type of the lamp area is the middle partition, the middle partition is located in the middle of the backlight partition, and is all the lamp areas except the corner partition and the edge partition. Since each lamp zone in the middle partition range has eight adjacent different lamp zones, it is necessary to specifically determine which lamp zone is one of the side lamp zones according to the specific position information of the lamp zone, and then obtain the backlight brightness values of the eight lamp zones adjacent to the lamp zone.
For example: the coordinate numbers of the middle lamp areas are as follows: s (i, j), 1< i < ROWS-2, 1< j < COLUMNS-2, and i and j are integers, there are 8 adjacent lamp zones, and the coordinate numbers S (i, j) of any lamp zone in the middle are set, 1< i < ROWS-2, 1< j < COLUMNS-2, so that the backlight brightness values of the adjacent lamp zones are L (S (i-1, j-1)) + L (S (i-1, j)) + L (S (i, j +1)) + L (S (i, j-1)) + L (S (i-1, j +1)) + L (S (i +1, j-1)) + L (S (i +1, j)) + L (S (i +1, j + 1)).
Further, the step of calculating the compensated backlight brightness value of the current lamp zone based on a preset brightness compensation algorithm and the backlight brightness values of the adjacent lamp zones of the current lamp zone comprises:
step S35, calculating the average value of the backlight brightness values of the eight adjacent lamp areas as the average value of the middle subarea;
for example: if the current lamp zone is located in the middle partition, the average value of the backlight brightness values of eight adjacent lamp zones ═((L (S (i-1, j-1)) + L (S (i-1, j)) + L (S (i, j +1)) + L (S (i, j-1)) + L (S (i-1, j +1)) + L (S (i +1, j-1)) + L (S (i +1, j + 1)))/8.
And step S36, multiplying the average value by a preset brightness compensation coefficient to obtain the compensation backlight brightness value of the current lamp zone.
And multiplying the average value of the backlight brightness values of the eight adjacent lamp areas by a preset brightness compensation coefficient K to obtain the compensated backlight brightness value of the lamp area.
For example: l (S (i, j)) = ((L (S (i-1, j-1)) + L (S (i-1, j)) + L (S (i, j +1)) + L (S (i, j-1)) + L (S (i-1, j +1)) + L (S (i +1, j-1)) + L (S (i +1, j)))/8) × K.
The second, third and fourth embodiments may be implemented individually, in a combination of two or three, that is, the light block may include one or more light zones, or may include one or more sub-zones.
By the backlight compensation method provided by the embodiment, the compensation backlight brightness value of the lamp area in the angular partition range is obtained by calculating the backlight brightness values of eight adjacent lamp areas of the lamp area in the intermediate partition range.
Further, as shown in fig. 7, a fifth embodiment of the backlight compensation method according to the present invention is proposed based on the first embodiment shown in fig. 3, and in this embodiment, before the step S1, the method further includes:
step S01, acquiring the backlight brightness value of the current lamp area;
step S02, determining whether the backlight brightness value is smaller than a preset backlight brightness threshold value;
if the backlight brightness value is smaller than a preset backlight brightness threshold value, executing the following steps: and acquiring the position information of the current lamp area, and determining the partition type of the current lamp area according to the position information.
In this embodiment, the display device obtains backlight luminance values of all the lamp zones from the main control chip, and sequentially performs luminance threshold determination on each lamp zone, if the backlight luminance value of a certain lamp zone is greater than or equal to a preset backlight luminance threshold value, it is not necessary to perform backlight luminance compensation on the lamp zone, but if the backlight luminance value of a certain lamp zone is less than the preset backlight luminance threshold value, it is necessary to perform backlight luminance compensation on the lamp zone, that is, the steps are performed: and acquiring the position information of the current lamp area.
Further, the step S4 includes:
step S41, adding the backlight brightness value of the current lamp zone and the compensation backlight brightness value to obtain a corrected backlight brightness value;
and step S42, controlling the current lamp area to output according to the corrected backlight brightness value.
After the calculation module calculates the compensation backlight brightness value of the current lamp zone, the compensation module adds the compensation backlight brightness value and the backlight brightness value of the lamp zone to obtain the backlight brightness value of the lamp zone after correction, and then the compensation module controls the lamp zone to output light with corresponding brightness according to the correction backlight brightness value, and at the moment, the brightness of the light output by the lamp zone becomes clear because of the backlight compensation of the adjacent lamp zone.
By the backlight compensation method provided by the embodiment, backlight compensation is automatically performed on the bright blocks in the dark area, and the phenomenon of uneven brightness is improved.
The technical scheme provided by the embodiment of the invention solves the problems that in the prior art, most of televisions with Local Dimming (Local backlight adjustment) technology have Local Dimming algorithm which is supported by SOC (System-on-a-Chip) suppliers or third parties, and the solidification is not easy to update. Some scenes in a television program are not well adapted to a Local Dimming algorithm, for example, a moving bright block like a torch moving in the dark can be suddenly turned on and off when moving, and the front and rear edges are not clear due to insufficient backlight, and especially when the number of backlight partitions is small, the distance between lamps is large, so that the Local Dimming algorithm is more obvious. When the bright block moves to the position of the backlight lamp, the bright block is brighter, and when the bright block moves between two lamps, the bright block is darker, and the change is more obvious the faster the moving speed is. This is due to the fact that the backlight is always delayed by one field sync (VSYNC vertical sync) period.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A backlight compensation method applied to a display device provided with a plurality of lamp zones, the backlight compensation method comprising the steps of:
acquiring a backlight brightness value of a current lamp area;
judging whether the backlight brightness value is smaller than a preset backlight brightness threshold value or not;
if the backlight brightness value is smaller than a preset backlight brightness threshold value, acquiring the position information of the current lamp area, and determining the partition type of the current lamp area according to the position information;
acquiring the backlight brightness value of the adjacent lamp area of the current lamp area according to the position information and the partition type;
calculating to obtain a compensation backlight brightness value of the current lamp zone based on a preset brightness compensation algorithm and the backlight brightness value of the adjacent lamp zone of the current lamp zone;
performing backlight compensation on the current lamp area based on the compensated backlight brightness value;
the method for calculating the compensation backlight brightness value of the current lamp zone based on the preset brightness compensation algorithm and the backlight brightness value of the adjacent lamp zone of the current lamp zone comprises the following steps:
calculating the average value of the backlight brightness values of the adjacent lamp areas, and multiplying the obtained average value by a preset brightness compensation coefficient to obtain the compensation backlight brightness value of the current lamp area;
based on the compensated backlight brightness value, performing backlight compensation on the current lamp area, including:
adding the backlight brightness value of the current lamp zone and the compensation backlight brightness value to obtain a corrected backlight brightness value; and controlling the current lamp area to output according to the corrected backlight brightness value.
2. The backlight compensation method of claim 1, wherein when the partition type is an angular partition, a lamp zone within the angular partition has three neighboring lamp zones, and the step of obtaining the backlight brightness values of the neighboring lamp zones of the current lamp zone according to the position information and the partition type comprises:
acquiring backlight brightness values of three adjacent lamp areas of the current lamp area within the angular division range according to the position information;
the step of calculating the compensated backlight brightness value of the current lamp zone based on a preset brightness compensation algorithm and the backlight brightness values of the adjacent lamp zones of the current lamp zone comprises the following steps:
calculating an angular average value of the backlight brightness values of the three adjacent lamp areas as an angular subarea average value;
and multiplying the average value of the angular division by a preset brightness compensation coefficient to obtain a compensation backlight brightness value of the current lamp area.
3. The backlight compensation method according to claim 1, wherein when the partition type is edge partition, the lamp zone within the edge partition range has five adjacent lamp zones, and the step of obtaining the backlight brightness values of the adjacent lamp zones of the current lamp zone according to the position information and the partition type comprises:
acquiring backlight brightness values of five adjacent lamp areas of the current lamp area within the edge partition range according to the position information;
the step of calculating the compensated backlight brightness value of the current lamp zone based on a preset brightness compensation algorithm and the backlight brightness values of the adjacent lamp zones of the current lamp zone comprises the following steps:
calculating the average value of the backlight brightness values of the five adjacent lamp areas as the average value of the edge areas;
and multiplying the average value of the edge partition by a preset brightness compensation coefficient to obtain a compensation backlight brightness value of the current lamp area.
4. The backlight compensation method according to claim 1, wherein when the partition type is a middle partition, eight neighboring lamp regions are provided for a lamp region within a middle partition range, and the step of obtaining backlight luminance values of neighboring lamp regions of the current lamp region according to the position information and the partition type comprises:
acquiring backlight brightness values of eight adjacent lamp areas of the current lamp area within the middle partition range according to the position information;
the step of calculating the compensated backlight brightness value of the current lamp zone based on a preset brightness compensation algorithm and the backlight brightness values of the adjacent lamp zones of the current lamp zone comprises the following steps:
calculating the average value of the backlight brightness values of the eight adjacent lamp areas as the average value of the middle subarea;
and multiplying the average value of the middle subarea by a preset brightness compensation coefficient to obtain a compensation backlight brightness value of the current lamp area.
5. The backlight compensation method of any one of claims 1 to 4, wherein the preset luminance compensation coefficient is greater than 0 and less than or equal to 1.
6. The display equipment is characterized in that the display equipment is used for acquiring a backlight brightness value of a current lamp area and judging whether the backlight brightness value is smaller than a preset backlight brightness threshold value or not; the display device includes:
the information acquisition module is used for acquiring the position information of the current lamp area when the backlight brightness value of the current lamp area is smaller than a preset backlight brightness threshold value, and determining the partition type of the current lamp area according to the position information;
the brightness obtaining module is used for obtaining the backlight brightness value of the adjacent lamp area of the current lamp area according to the position information and the partition type;
the calculation module is used for calculating a compensation backlight brightness value of the current lamp area based on a preset brightness compensation algorithm and the backlight brightness value of the adjacent lamp area of the current lamp area;
the compensation module is used for carrying out backlight compensation on the current lamp area based on the compensation backlight brightness value;
the method for calculating the compensation backlight brightness value of the current lamp zone based on the preset brightness compensation algorithm and the backlight brightness value of the adjacent lamp zone of the current lamp zone comprises the following steps:
calculating the average value of the backlight brightness values of the adjacent lamp areas, and multiplying the obtained average value by a preset brightness compensation coefficient to obtain the compensation backlight brightness value of the current lamp area;
based on the compensated backlight brightness value, performing backlight compensation on the current lamp area, including:
adding the backlight brightness value of the current lamp zone and the compensation backlight brightness value to obtain a corrected backlight brightness value; and controlling the current lamp area to output according to the corrected backlight brightness value.
7. A backlight compensation system, comprising: memory, a processor and a backlight compensation program stored on the memory and executable on the processor, the backlight compensation program when executed by the processor implementing the steps of the backlight compensation method according to any one of claims 1 to 5.
8. A storage medium having a backlight compensation program stored thereon, which when executed by a processor implements the steps of the backlight compensation method according to any one of claims 1 to 5.
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| CN110211540A (en) * | 2019-05-30 | 2019-09-06 | 深圳创维－Rgb电子有限公司 | A kind of multi-region method for controlling backlight thereof, device, terminal and storage medium |
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