WO2020001525A1 - 拼接显示装置及其背光控制方法 - Google Patents

拼接显示装置及其背光控制方法 Download PDF

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Publication number
WO2020001525A1
WO2020001525A1 PCT/CN2019/093221 CN2019093221W WO2020001525A1 WO 2020001525 A1 WO2020001525 A1 WO 2020001525A1 CN 2019093221 W CN2019093221 W CN 2019093221W WO 2020001525 A1 WO2020001525 A1 WO 2020001525A1
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WIPO (PCT)
Prior art keywords
backlight
partition
brightness value
module
backlight module
Prior art date
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PCT/CN2019/093221
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English (en)
French (fr)
Inventor
程金辉
闫恒宇
孟占昆
贺能
牛汉章
Original Assignee
京东方科技集团股份有限公司
北京京东方显示技术有限公司
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Application filed by 京东方科技集团股份有限公司, 北京京东方显示技术有限公司 filed Critical 京东方科技集团股份有限公司
Priority to EP19826641.3A priority Critical patent/EP3816987A4/en
Priority to US16/643,007 priority patent/US11069307B2/en
Publication of WO2020001525A1 publication Critical patent/WO2020001525A1/zh

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    • G—PHYSICS
    • 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
    • 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
    • G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • G09G3/3426—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines the different display panel areas being distributed in two dimensions, e.g. matrix
    • G—PHYSICS
    • 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
    • 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
    • G09G3/3413—Details of control of colour illumination sources
    • G—PHYSICS
    • 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
    • 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
    • G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/14—Display of multiple viewports
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/02—Composition of display devices
    • G09G2300/026—Video wall, i.e. juxtaposition of a plurality of screens to create a display screen of bigger dimensions
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0686—Adjustment of display parameters with two or more screen areas displaying information with different brightness or colours
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Definitions

  • the present disclosure relates to the field of display technology, and in particular, to a mosaic display device and a backlight control method thereof.
  • the spliced display device is formed by splicing multiple display modules, so that it can realize super-large screen and super high-resolution display.
  • splicing display devices have been widely used in conferences, security and monitoring fields.
  • Each display module of the spliced display device includes a display panel and a backlight module.
  • the display panel includes multiple display sections.
  • the backlight module includes a backlight sub-area corresponding to each display sub-area.
  • backlight modules often use 3D dynamic local dimming (3D Local Dimming) to control the backlight, that is, according to the brightness contained in the display screen information Information to dynamically change the brightness of each backlight partition.
  • 3D dynamic local dimming 3D Local Dimming
  • the statistical brightness of the pixel gray levels of each display partition determines the brightness of the backlight partition corresponding to the display partition.
  • Each display module controls the brightness of a plurality of backlight partitions of a corresponding backlight module according to a picture to be displayed by a display panel included in the display module. Therefore, when there is a difference in the pixel grayscale statistical brightness of the adjacent display partitions located in the adjacent display modules, there will be a difference in the brightness of the adjacent backlight partitions corresponding to the adjacent display partitions, which in turn leads to a mosaic display device The problem of uneven brightness occurs.
  • a backlight control method for a mosaic display device includes multiple display modules, each of which includes its own backlight module, each backlight module includes multiple backlight partitions, the multiple backlight partitions include a first backlight partition, and the first backlight partition is located at each An edge of a corresponding backlight module in the backlight module.
  • the method includes: for the first backlight partition of each backlight module: obtaining an initial brightness value and a reference brightness value of the first backlight partition; and performing an initial brightness value of the first backlight partition according to the reference brightness value Adjusting to obtain the adjusted brightness value of the first backlight partition; and controlling the brightness of the first backlight partition according to the adjusted brightness value.
  • the multiple display modules include a first display module and a second display module, the first display module includes a first backlight module, the second display module includes a second backlight module, and the second The backlight module includes a second backlight partition adjacent to the first backlight partition located at the edge of the first backlight module and located at the edge of the second backlight module, and wherein the first backlight partition located at the edge of the first backlight module is obtained.
  • the reference brightness value includes: obtaining an initial brightness value of the second backlight partition as a reference brightness value of the first backlight partition located at an edge of the first backlight module.
  • obtaining the initial brightness value of the first backlight partition located at the edge of the corresponding backlight module includes: obtaining the initial brightness of the first backlight partition located at the edge of the corresponding backlight module according to the dynamic partition dimming algorithm of the corresponding backlight module. value.
  • acquiring the initial brightness value of the first backlight partition located at the edge of the corresponding backlight module includes: The initial brightness value of the first backlight partition on the edge of the backlight module.
  • obtaining the initial brightness value of the second backlight partition includes: receiving the initial brightness value of the backlight partition located on the edge of each of the backlight modules except the first backlight module among the plurality of display modules; and receiving An initial brightness value of the second backlight partition located at the edge of the second backlight module is selected from the obtained initial brightness values.
  • selecting the initial brightness value of the second backlight partition located at the edge of the second backlight module includes: selecting a second backlight located at the edge of the second backlight module and adjacent to the first backlight module in at least one direction. The initial brightness value of the partition.
  • the at least one direction includes at least one of a horizontal direction and a vertical direction.
  • a spliced display device including a plurality of display modules, each of which includes a respective backlight module, and each backlight module includes a plurality of backlight partitions, and a plurality of backlight partitions. It includes a first backlight partition, and the first backlight partition is located at the edge of a corresponding backlight module in each backlight module.
  • Each backlight module further includes: a light source configured to emit light so as to output a backlight; and a brightness adjuster configured.
  • the controller is configured To drive the light source to emit light according to the adjusted brightness value to control the brightness of the first backlight partition.
  • the multiple display modules include a first display module and a second display module, the first display module includes a first backlight module, the second display module includes a second backlight module, and the second The backlight module includes a second backlight partition adjacent to the first backlight partition located on the edge of the first backlight module and on the edge of the second backlight module, and the brightness adjuster of the first backlight module is configured to obtain the second backlight module.
  • the initial brightness value of the backlight partition is used as the reference brightness value of the first backlight partition located at the edge of the first backlight module.
  • each display module further includes multiple display partitions, and the multiple display partitions correspond to corresponding backlight partitions among the multiple backlight partitions in the backlight module.
  • the brightness adjuster is configured to obtain the initial brightness value of the first backlight partition located at the edge of the corresponding backlight module according to the dynamic partition dimming algorithm of the corresponding backlight module.
  • the brightness adjuster is configured to obtain the initial brightness value of the corresponding backlight zone according to the pixel grayscale statistical brightness of the display zone corresponding to the first backlight zone located at the edge of the corresponding backlight module.
  • the plurality of display modules are arranged in a matrix manner, and the first backlight module is adjacent to the at least one second backlight module in at least one direction.
  • the first display module further includes a data transmission unit configured to transmit an initial brightness value of the first backlight partition of the first backlight module to one or more other backlight modules in the display device, And receiving an initial brightness value of the second backlight partition from the second backlight module.
  • a computer-readable storage medium having stored thereon a computer program that implements the steps of the above method when executed by a processor.
  • a computer device including a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the above method.
  • FIG. 1 is a schematic structural diagram of a mosaic display device provided by related technologies
  • FIG. 2 is a schematic structural diagram of a backlight module according to an embodiment of the present disclosure
  • FIG. 3 is a schematic flowchart of a method for controlling a backlight module according to an embodiment of the present disclosure
  • FIG. 4 is a schematic structural diagram of a display device according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic flowchart of a backlight control method for a display device according to an embodiment of the present disclosure
  • FIG. 6 is a structural block diagram of a backlight module according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of successively cascading display modules in a display device according to an embodiment of the present disclosure.
  • Embodiments of the present disclosure provide a backlight module and a control method thereof, a mosaic display device and a backlight control method thereof, and a display module, which can improve the uniformity of the display brightness of the mosaic display device.
  • FIG. 1 shows a schematic diagram of a mosaic display device provided by the related art.
  • the spliced display device 10 is formed by splicing a display module 101 and a display module 102.
  • the display module 101 includes a backlight partition A
  • the display module 102 includes a backlight partition B
  • the backlight partition A is adjacent to the backlight partition B.
  • the display module 101 controls the brightness of the backlight partition A to a through a 3D dynamic partition dimming technology according to a picture to be displayed thereon.
  • the display module 102 controls the brightness of the backlight partition B to b through a 3D dynamic partition dimming technology according to a picture to be displayed thereon.
  • FIG. 2 is a schematic structural diagram of a backlight module according to an embodiment of the present disclosure.
  • the backlight module 20 includes a plurality of backlight partitions 201.
  • the backlight module 20 may be divided according to needs to obtain different numbers of backlight partitions 201.
  • FIG. 2 illustrates that the backlight module 20 includes 6 ⁇ 8 backlight partitions 201 as an example. It can be understood that the embodiments of the present disclosure are not limited thereto, and there may be other numbers of backlight partitions.
  • the backlight partition 201 can be divided into edge backlight partitions located at the edges of the backlight module, such as the backlight partitions m-1 to m-24 located at the upper, lower, left, and right edges of the backlight module 20, and the non-edges located at the middle Backlit partition.
  • the edge backlight partition may be adjacent to the edge backlight partition of other backlight modules in other display modules during the splicing process of the display module.
  • FIG. 3 is a schematic flowchart of a method for controlling a backlight module according to an embodiment of the present disclosure. As shown in FIG. 3, the control method of the backlight module includes the following steps.
  • the first backlight partition may be any one of the backlight partitions m-1 to m-24 shown in FIG. 2.
  • the reference brightness value may be a preset brightness value; it may also be an initial brightness value of a backlight partition other than the first backlight partition.
  • the other backlight partitions and the first backlight partition may be located in the same backlight module, or may be located in different backlight modules.
  • the display device is a mosaic display device
  • the mosaic display device includes a plurality of backlight modules.
  • the reference brightness value may be an initial brightness value of the second backlight partition.
  • the second backlight partition may be an edge backlight partition at an edge of an adjacent backlight module of the backlight module, and is adjacent to the first backlight partition.
  • Obtaining the initial brightness value of the first backlight partition can be performed in different ways.
  • the initial brightness value of the first backlight partition located at the edge of the backlight module can be obtained according to the dynamic partition dimming algorithm (LD algorithm) of the backlight module.
  • LD algorithm dynamic partition dimming algorithm
  • the backlight module when the backlight module includes multiple backlight partitions, the backlight module has an LD function, and the brightness of each backlight partition can be controlled by the LD function.
  • the brightness value of each backlight zone can be calculated according to the dynamic zone dimming algorithm in the LD function, including calculating and obtaining the initial brightness value of the first backlight zone located at the edge of the backlight module.
  • the initial brightness value of the first backlight sub-area may be obtained according to the pixel gray-scale statistical brightness of the display sub-area corresponding to the first backlight sub-area.
  • the display module usually includes a display panel and a backlight module.
  • the display panel includes multiple display sections.
  • the backlight module includes a backlight sub-area corresponding to each display sub-area.
  • the pixel grayscale statistical brightness of the display partition determines the initial brightness value of the backlight partition corresponding to the display partition. Therefore, when the display panel displays a picture, the initial brightness value of the first backlight partition may be obtained according to the pixel grayscale statistical brightness of the display partition corresponding to the first backlight partition.
  • the initial brightness value of the first backlight partition when adjusting the initial brightness value of the first backlight partition, it may be adjusted according to one reference brightness value; it may also be adjusted according to two or more reference brightness values.
  • the adjustment may be performed in any suitable manner that enables the difference between the adjusted brightness value of the first backlight partition and the reference brightness value to be reduced.
  • b 0 may be an average value of two or more reference brightness values; A reference brightness value selected from one or more reference brightness values.
  • the adjusted brightness value changes with the reference brightness value. Because when the initial brightness value of the first backlight partition is smaller than the reference brightness value, the adjusted brightness value will be greater than the initial brightness value, that is, it will increase toward the reference brightness value, and vice versa. The difference between the brightness value and the reference brightness value is reduced.
  • the backlight module included in each display module can be controlled according to the control method of the backlight module described above. This can reduce the difference between the brightness values of adjacent backlight partitions in adjacent backlight modules.
  • the reference brightness value may be the initial brightness value of the second backlight partition on the edge of the second backlight module adjacent to the first backlight module in the mosaic display device. .
  • the second backlight partition is adjacent to the first backlight partition.
  • the adjustment of the brightness value of the first backlight section in the first backlight module refers to the initial brightness value of the second backlight section in the second backlight module adjacent thereto. .
  • the difference between the adjusted brightness values of adjacent backlight partitions can be reduced, thereby achieving adjustment of the brightness values of adjacent backlight partitions across the backlight module, and thereby improving the brightness uniformity of the mosaic display device.
  • the brightness value adjustment according to the embodiment of the present disclosure may be performed when a change in the initial brightness value of the first backlight partition is detected. Additionally, the adjustment of the brightness value according to the embodiment of the present disclosure may also be performed when a change in the reference brightness value is detected. Additionally or alternatively, the adjustment of the brightness value according to the embodiment of the present disclosure may also be performed at a certain time interval. In this way, the brightness value of the first backlight partition can be adjusted dynamically and in real time in response to changes in the initial brightness value and the reference brightness value of the first backlight partition.
  • the backlight control method of the splicing display device 10 includes: the control method of each backlight module 20a, 20b, 20c, and 20d is performed according to the control method of the backlight module.
  • the first backlight partition is located at the edge of the first backlight module.
  • the reference brightness value is the initial brightness value of the second backlight partition located at the edge of the second backlight module.
  • the second backlight module is one of the plurality of backlight modules 20 adjacent to the first backlight module, and the second backlight partition is adjacent to the first backlight partition.
  • each display module includes a backlight module 20
  • the size of each backlight module 20 in the spliced display device 10 is the same.
  • the number of the backlight partitions 201 included on the adjacent edges of the adjacent backlight modules 20 is the same.
  • the backlight modules 20 a when the splicing display device 10 includes four backlight modules 20, namely, a backlight module 20 a, a backlight module 20 b, a backlight module 20 c, and a backlight module 20 d, the backlight modules 20 a,
  • the control methods of the backlight module 20b, the backlight module 20c, and the backlight module 20d are all performed according to the above-mentioned control method of the backlight module.
  • the backlight module 20a is the first backlight module
  • the first backlight partition may be m-1, m-7 to m-12
  • the second backlight module may be the backlight module 20b and the backlight module 20c.
  • the control method of the backlight module 20b is executed according to the control method of the backlight module, the backlight module 20b is the first backlight module, and so on.
  • the initial brightness value of the adjacent backlight partition can be adjusted at the same time, or the initial brightness value of one backlight partition of the adjacent backlight partition can be adjusted first, and then The initial brightness value of the other backlight zone is adjusted.
  • the adjacent backlight partitions located in adjacent backlight modules whether they are adjusted at the same time or sequentially, when referring to the initial brightness value of one of the backlight partitions, it refers to the brightness value before adjustment of the backlight partition. The subsequent brightness value is irrelevant.
  • the first backlight partition of any backlight module there may be one or more second backlight partitions adjacent to the first backlight partition.
  • the first backlight partition o-2 in the backlight module 20c when the first backlight partition o-2 in the backlight module 20c is adjusted, the first backlight module is the backlight module 20c, and the second backlight partition is located in the backlight module 20a.
  • the second backlight section is the backlight section m-10 located in the backlight module 20a and the backlight section p-4 located in the backlight module 20d.
  • the second backlight partition may also be the backlight partition n-7 located in the backlight module 20b.
  • the first backlight partition when adjusting the initial brightness value of the first backlight partition, if there is one second backlight partition adjacent to the first backlight partition, the first backlight partition is based on the initial brightness value of the second backlight partition. To adjust the initial brightness value. If the first backlight partition is adjacent to a plurality of second backlight partitions, the initial brightness value of the first backlight partition may be adjusted according to the initial brightness value of one second backlight partition among the plurality of second backlight partitions, or may be adjusted according to multiple The initial brightness values of the second backlight partitions adjust the initial brightness values of the first backlight partition. In some embodiments, the initial brightness value of the first backlight partition may be adjusted according to an average value of the initial brightness of the plurality of second backlight partitions.
  • the first backlight partition when the first backlight partition o-1 in the backlight module 20c is adjusted, the first backlight partition may be based on the initial brightness value of the backlight partition p-4 located in the backlight module 20d.
  • the initial brightness value of o-1 is adjusted; or the initial brightness value of the first backlight zone o-1 may be adjusted according to the initial brightness value of the backlight zone m-10 located in the backlight module 20a.
  • the first backlight partition o-1 may also be based on the initial brightness value of the backlight partition m-10 located in the backlight module 20a and the initial brightness value of the backlight partition p-4 located in the backlight module 20d. Adjust the initial brightness value.
  • the brightness value of the backlight partition located at the edge of each backlight module 20 can be adjusted according to the initial brightness value of the backlight partition located in the adjacent backlight module and adjacent to the backlight partition, it is located at The difference in the adjusted brightness values of adjacent backlight partitions at the edges of adjacent backlight modules is reduced, that is, the adjusted brightness values of adjacent backlight partitions at the edges of adjacent backlight modules tend to approach.
  • the backlight module 20a is adjacent to the backlight module 20b
  • the backlight partition m-12 in the backlight module 20a is adjacent to the backlight partition n-5 in the backlight module 20b
  • the initial brightness value of the backlight partition m-12 is is s 0, the initial luminance of the backlight partitioned n-5 value t 0, the initial value of the backlight luminance partitions n-5 t 0 of the initial partition backlight luminance value of the m-12 s 0 adjustments
  • the backlight can partition m
  • the initial brightness value s 0 of -12 is adjusted to the initial brightness value t 0 of the backlight partition n-5.
  • the adjusted brightness value of the backlight zone m-12 refers to the initial brightness value of the neighboring backlight zone n-5
  • the adjusted brightness value of the backlight zone n-5 refers to the initial brightness of the neighboring backlight zone m-12. value.
  • the brightness value of a backlight partition with a larger initial brightness value will decrease toward the initial brightness value of another backlight partition and vice versa (in general, s 0 and t 0 are not equal), so the backlight partition
  • the difference between the adjusted brightness value of m-12 and the adjusted brightness value of backlight section n-5 is smaller than the difference between the initial brightness value of backlight section m-12 and the initial brightness value of backlight section n-5.
  • the adjusted brightness values of backlight partition m-12 and backlight partition n-5 will be equal to 2t 0 s 0 / (t 0 + s 0 ).
  • the phase of the adjacent backlight modules 20 is reduced.
  • the difference in brightness values between adjacent edges is reduced.
  • the lower edge of the backlight module 20 a is adjacent to the upper edge of the backlight module 20 c. Because the difference between the brightness value adjusted for the backlight partition m-7 according to the backlight partition o-4 and the brightness value adjusted for the backlight partition o-4 according to the backlight partition m-7 is reduced, the backlight is adjusted according to the backlight partition o-3.
  • the difference between the brightness value adjusted in the partition m-8 and the brightness value adjusted in the backlight partition o-3 according to the backlight partition m-8 is reduced, and the brightness value adjusted in the backlight partition m-9 according to the backlight partition o-2
  • the difference from the brightness value adjusted to the backlight partition o-2 according to the backlight partition m-9 is reduced, and the brightness value adjusted to the backlight partition m-10 according to the backlight partition o-1 and the backlight is adjusted according to the backlight partition m-10
  • the difference in brightness values after the division o-1 is reduced, so the difference in brightness between the lower edge of the backlight module 20a and the upper edge of the backlight module 20c is reduced.
  • the backlight partitions located at the edge of the backlight module and those at the edges of adjacent backlight modules may be adjusted.
  • the initial brightness value of one backlight partition 201 or several backlight partitions 201 adjacent to the backlight partition is adjusted.
  • the adjusted backlight partition may be referred to as a first backlight partition. That is, one or more of the plurality of backlight partitions 201 located on the edge of the backlight module 20 and the backlight partitions 201 adjacent to the backlight partition on the edge of the adjacent backlight module may be used as the first backlight partition. For example, as shown in FIG.
  • the backlight partition adjacent to the backlight partition located on the edge of the adjacent backlight module includes m-7 to m-12 and m-1, and the backlight partition m-7 can be used.
  • the initial brightness values of one or more backlight partitions in ⁇ m-12 and m-1 are adjusted, that is, one or more of backlight partitions m-7 ⁇ m-12 and m-1 can be used as the first backlight partition.
  • a backlight partition 201 adjacent to a backlight partition 201 on the edge of an adjacent backlight module 20 is used as the first backlight partition.
  • the initial brightness values of all the first backlight partitions are adjusted.
  • the adjustment of the brightness value is performed only when the difference between the initial brightness value of the first backlight partition and the reference brightness value is greater than a certain threshold. This can save processing resources for brightness adjustment and improve the response speed of brightness adjustment of the entire backlight module.
  • a backlight partition adjacent to a backlight partition located on the edge of an adjacent backlight module among a plurality of backlight partitions located on the edge of a backlight module is adjusted as the first backlight partition, it is equivalent to
  • the initial brightness values of the backlight partitions adjacent to the backlight partitions located on the edges of adjacent backlight modules among multiple backlight partitions located on the edge of a backlight module have been adjusted, thereby reducing the adjacent backlight partitions of different backlight modules.
  • the difference in brightness values between them ensures the brightness uniformity of the mosaic display device.
  • any applicable method may be used to obtain the reference brightness value for each backlight module.
  • the initial brightness value of the second backlight partition located at the edge of the second backlight module For example, the initial brightness value of the second backlight partition located at the edge of the second backlight module.
  • an initial brightness value of a backlight partition located at an edge of each backlight module 20 except the first backlight module may be received, and a second backlight partition located at an edge of the second backlight module may be selected from the received initial brightness values.
  • the initial brightness value of the second backlight module is adjacent to the first backlight module, and the second backlight partition is adjacent to the first backlight partition.
  • each backlight module 20 can first obtain the initial brightness values of the backlight partitions located at the edges of other backlight modules, and then select the backlight modules 20 from the initial brightness values of the backlight partitions located at the edges of other backlight modules.
  • the initial brightness value of the backlight partition adjacent to the backlight partition at the edge of For example, as shown in FIG. 4, when the backlight module 20 a is the first backlight module, the backlight module 20 a first obtains the initial state of the backlight partition 201 located on the edge of the backlight module 20 b, the backlight module 20 c, and the backlight module 20 d.
  • the brightness value that is, the initial brightness values of the backlight partitions n-1 to n-12, the backlight partitions o-1 to o-12, and the backlight partitions p-1 to p-12 are obtained, and then the initial brightness values of these backlight partitions 201 are obtained.
  • the first backlight partition when the first backlight partition is m-1, the initial brightness value of the second backlight partition n-4 is selected; when the first backlight partition is m-12, the initial brightness value of the second backlight partition is n-5; And so on.
  • the backlight module 20b is the first backlight module
  • the backlight module 20c is the first backlight module
  • the backlight module 20d is the first backlight module
  • the first backlight partition can be divided in the same manner. Select the corresponding second backlight partition.
  • each backlight module 20 can receive the initial brightness values of the backlight partitions located at the edges of other backlight modules 20, when each backlight module 20 is the first backlight module, every time Each backlight module 20 can obtain the corresponding initial brightness value of the second backlight partition located at the edge of the second backlight module.
  • the backlight module 20 includes a matrix
  • a first backlight module is adjacent to a plurality of second backlight modules, and a first backlight section is adjacent to a plurality of second backlight sections, a plurality of backlight modules is selected.
  • the backlight module adjacent to the first backlight module in the horizontal direction or the vertical direction in 20 is used as the second backlight module, and the horizontal or vertical direction of the second backlight module and the first backlight module are selected accordingly.
  • a backlight partition adjacent to the backlight partition serves as a second backlight partition.
  • the horizontal direction may include a horizontal leftward direction and a horizontal rightward direction
  • the vertical direction may include an upward direction and a downward direction that are perpendicular to the horizontal direction.
  • the second backlight partition is p-4; if the second backlight module is a backlight module 20a adjacent to the first backlight module in the vertical direction, the second backlight partition is m-10.
  • the second backlight module may be a backlight module adjacent to the first backlight module in the horizontal direction; A backlight module is adjacent to the backlight module.
  • a backlight module adjacent to the first backlight module in the horizontal direction may be selected.
  • a backlight module adjacent to the first backlight module in the vertical direction is selected as the second backlight module. For example, as shown in FIG.
  • the backlight module 20c is the second backlight module; when the backlight module 20c is the first backlight module, the backlight module 20a is the second backlight module; when the backlight module 20b is the first backlight module, the backlight module 20d is the second Backlight module; when the backlight module 20d is the first backlight module, the backlight module 20b is the second backlight module.
  • the second backlight module is a backlight module adjacent to the first backlight module in the horizontal direction or the vertical direction among the plurality of backlight modules 20, it is located at the edge of the first backlight module.
  • the first backlight partition has only a second backlight partition adjacent to it, so it is only necessary to adjust the initial brightness value of the first backlight partition according to the initial brightness value of this second backlight partition, thereby simplifying the first backlight. The process of adjusting the initial brightness value of a partition.
  • FIG. 5 illustrates a backlight control method of the mosaic display device 10 according to an embodiment of the present disclosure.
  • each backlight module 20 in S200 and the mosaic display device 10 obtains the initial brightness value of the backlight partition located at its edge.
  • only the initial brightness values of the backlight partitions existing at the edges of adjacent backlight modules may be obtained. In this way, it helps to reduce the amount of data to be processed, thereby increasing the processing speed.
  • each backlight module 20 also obtains the initial brightness values of the backlight partitions located at the edges of other backlight modules in the mosaic display device.
  • only the initial brightness value of the backlight partition of the edge of the backlight module adjacent to it can be obtained.
  • each backlight module 20 serves as a first backlight module, and a backlight adjacent to the first backlight partition located on the edge of the first backlight module is selected from the initial brightness values of the backlight partitions located on the edges of other backlight modules.
  • the initial brightness value of the partition In some embodiments, only the initial brightness value of the backlight partition adjacent to the first backlight partition in a specific one or more directions may be selected.
  • the initial brightness value of the first backlight partition located at the edge of the first backlight module is adjusted according to the initial brightness value of the backlight partition adjacent to the first backlight partition located at the edge of the first backlight module to The initial brightness value of the backlight partition at the edge of each backlight module is adjusted.
  • the corresponding backlight brightness is output according to the adjusted brightness value of the backlight partition located at the edge of the backlight module.
  • FIG. 6 illustrates a backlight module 600 provided by an embodiment of the present disclosure.
  • the backlight module 600 includes a light source 610, a brightness adjuster 620, and a controller 630.
  • the light source 610 is configured to emit light.
  • the light source 610 may be, for example, an incandescent light bulb, an electro-optic panel (ELP), a light emitting diode (LED), a cold cathode tube (CCFL), or the like.
  • ELP electro-optic panel
  • LED light emitting diode
  • CCFL cold cathode tube
  • the brightness adjuster 620 is configured to obtain an initial brightness value and a reference brightness value of the first backlight partition located at the edge of the backlight module 600, and adjust the initial brightness value of the first backlight partition according to the reference brightness value to obtain the first backlight. Brightness value after partition adjustment.
  • the brightness adjuster 620 may be implemented by a processor.
  • the processor 30 may be, for example, a SOC (System On Chip).
  • the brightness adjuster 620 is configured to obtain the initial brightness value of the first backlight partition located at the edge of the backlight module in any suitable manner.
  • the brightness adjuster 620 is configured to obtain an initial brightness value of a first backlight partition located at an edge of the backlight module according to a dynamic partition dimming algorithm of the backlight module.
  • the backlight module 20 includes a plurality of backlight sections 201, and when the backlight module 20 has an LD function, the brightness of each backlight section is controlled by the LD function. Based on this, since the brightness value of each backlight partition can be calculated according to the dynamic partition dimming algorithm in the LD function, the brightness adjuster 620 can obtain the first located at the edge of the backlight module according to the dynamic partition dimming algorithm of the backlight module. The initial brightness value of the backlight partition.
  • the program of the dynamic partition dimming algorithm in the LD function may be integrated on the brightness adjuster 620 of the backlight module 20, or may be set on a separate LD processor (different from the brightness adjuster 620) Processor).
  • the LD processor may be communicatively connected with the brightness adjuster 620 of the backlight module 20.
  • the initial brightness value of the first backlight partition located at the edge of the backlight module may be calculated first according to the dynamic partition dimming algorithm in the LD processor, and then the obtained initial brightness value of the first backlight partition may be transmitted.
  • the initial brightness value of the first backlight partition may be transmitted to the brightness adjuster 620 through serial data of Serial Peripheral Interface (SPI).
  • SPI Serial Peripheral Interface
  • the brightness adjuster 620 may be configured to obtain the initial brightness value of the first backlight partition according to the pixel grayscale statistical brightness of the display partition corresponding to the first backlight partition located at the edge of the backlight module.
  • the display module includes a display panel and a backlight module.
  • the display panel includes multiple display sections.
  • the backlight module 20 includes a backlight partition 201 corresponding to each display partition. Since the pixel grayscale statistical brightness of the display sub-region determines the initial brightness value of the backlight sub-region 201 corresponding to the display sub-region, when the first backlight module displays a picture, the brightness adjuster 620 may be located at the edge of the first backlight module according to The statistical grayscale luminance of the pixels of the display partition corresponding to the first backlight partition is used to obtain the initial brightness value of the first backlight partition.
  • the brightness adjuster 620 can obtain the initial brightness values of the first backlight partition located at the edge of the first backlight module, and also obtain the initial brightness values of the backlight partition located at other positions of the first backlight module.
  • the brightness adjuster 620 may obtain the initial brightness values of the multiple backlight partitions according to the statistical brightness of the pixel gray levels of the multiple display partitions, and then select the first brightness value from the initial brightness values of the multiple backlight partitions. The initial brightness value of the first backlight partition at the edge of the module.
  • the brightness adjuster 620 may adjust the initial brightness value of the first backlight partition according to the reference brightness value in any suitable manner, so that the adjusted brightness value of the first backlight partition and the reference brightness value The difference can be reduced.
  • the adjusted brightness value is related to the reference brightness value, and the brightness value of the first backlight partition is changed toward the reference brightness value, so the difference between the adjusted brightness value of the first backlight partition and the reference brightness value is reduced.
  • the controller 630 is configured to receive the adjusted brightness value of the first backlight section from the brightness adjuster 620, and control the emission of the light source 610 so that the first backlight section outputs the corresponding backlight brightness according to the received adjusted brightness value.
  • the controller 630 may be, for example, a backlight driving control MCU (Microcontroller Unit).
  • the controller 40 may drive the brightness value adjusted according to the first backlight partition.
  • the light source 610 emits light to control the first backlight partition to output a corresponding backlight brightness.
  • An embodiment of the present disclosure further provides a display module including a display panel and the above-mentioned backlight module.
  • the display panel includes a plurality of display sections, and one display section corresponds to one backlight section.
  • the display panel can be of any applicable type.
  • the display panel may be any non-autonomous light-emitting display panel such as a liquid crystal display panel or an electrophoretic display panel.
  • An embodiment of the present disclosure further provides a display device 10 including a plurality of the above-mentioned display modules spliced together.
  • the reference brightness value of the edge of the first backlight module in the first backlight section located in the display module is the initial brightness value of the second backlight section in the edge of the second backlight module in the display module.
  • the second backlight module is adjacent to the first backlight module, and the second backlight partition is adjacent to the first backlight partition.
  • each backlight module 20 in the multiple display modules can be made the same, and the adjacent edges of adjacent backlight modules 20 include The number of backlight sections 201 is the same.
  • the second backlight partition when the first backlight partition located at the edge of the first backlight module is adjacent to a plurality of second backlight partitions, the second backlight partition is located at the edge of the second backlight module, and the second backlight module is adjacent to the first backlight module.
  • the brightness value of the first backlight partition at the edge of the first backlight module may be adjusted according to one or more of the plurality of second backlight partitions.
  • the brightness value of the backlight partition located at the edge of each backlight module 20 in the display module can be adjusted according to the initial brightness value of the backlight partition adjacent to the backlight partition among its adjacent backlight modules. Therefore, after adjustment, the difference in brightness values between adjacent backlight partitions located at the edges of adjacent backlight modules is reduced, that is, the adjusted brightness values of adjacent backlight partitions located at the edges of adjacent backlight modules tend to approach . For example, as shown in FIG.
  • the backlight module 20a and the backlight module 20b are adjacent, the backlight partition m-12 in the backlight module 20a and the backlight partition n-5 in the backlight module 20b are adjacent, and the backlight partition m
  • the initial brightness value of -12 is s 0
  • the initial brightness value of backlight partition n-5 is t 0 .
  • the difference in brightness values between adjacent backlight partitions in adjacent backlight modules is reduced. This improves the uniformity of brightness among the multiple backlight modules 20, so the uniformity of brightness of the mosaic display device provided by the embodiment of the present disclosure is improved, thereby improving the display effect of the mosaic display device.
  • a backlight partition adjacent to a backlight partition located on the edge of an adjacent backlight module among a plurality of backlight partitions on the edge of a backlight module may be used as the first backlight partition.
  • a backlight partition adjacent to a backlight partition located on the edge of an adjacent backlight module among a plurality of backlight partitions located on the edge of a backlight module can be used as the first backlight partition, it can be used for a backlight module.
  • Each of the plurality of backlight partitions at the edge of the group and each backlight partition adjacent to the backlight partition located at the edge of an adjacent backlight module is adjusted to ensure the brightness uniformity of the mosaic display device.
  • the initial brightness of the first backlight partition when adjusting the initial brightness value of the first backlight partition, may be adjusted according to the initial brightness value of one of the second backlight partitions. The value may be adjusted. Alternatively, the initial brightness value of the first backlight sub-area may also be adjusted according to the initial brightness values of the two or more second backlight sub-areas.
  • the backlight module 20 in order to simplify the adjustment of the initial brightness value of the first backlight partition, includes a plurality of backlight partitions 201 arranged in a matrix manner, and the first backlight module and the plurality of second backlight modules.
  • a plurality of backlight modules 20 may be selected to be adjacent to the first backlight module in a certain direction (such as a horizontal direction or a vertical direction).
  • the backlight module is used as the second backlight module, and a backlight partition adjacent to the first backlight partition in the direction in the second backlight module is correspondingly selected as the second backlight partition.
  • the second backlight module is a backlight module adjacent to the first backlight module in the horizontal direction or the vertical direction among the plurality of backlight modules 20, for the backlight module located at the edge of the first backlight module, There is only one second backlight partition adjacent to the first backlight partition. In this way, it is only necessary to adjust the initial brightness value of the first backlight partition according to the initial brightness value of the second backlight partition, thereby simplifying the process of adjusting the initial brightness value of the first backlight partition.
  • each display module further includes: a data transmission unit.
  • the data transmission unit is configured to receive, from other display modules, the initial brightness values of the backlight partitions at the edges of the backlight modules of the other display modules and transmit the initial brightness values of the backlight partitions at the edges of its own backlight modules to the other display modules.
  • the brightness adjuster 620 is further configured to select an initial brightness value of the second backlight partition located on the edge of the second backlight module from the received initial brightness values of the backlight partition located on the edge of each backlight module except the first backlight module.
  • the data transmission unit may be of any suitable type.
  • the data transmission unit may adopt, for example, a wired transmission type, such as a data line or a wireless transmission type, such as Bluetooth.
  • each display module in the splicing display device 10 when each display module in the splicing display device 10 is connected through a connection cable in an Ethernet interface, a serial port, or an interface such as DVI / HDMI, since each display module includes a data transmission unit, either The data transmission unit of the display module can receive the initial brightness values of the backlight partitions located at the edges of other backlight modules.
  • the data transmission unit of the display module can receive the initial brightness value of the backlight partition located on the edge of other backlight modules.
  • each display module 1-9 can be cascaded in sequence through a network cable, a serial port or a data cable in an interface such as DVI / HDMI (the arrows in FIG. 7 indicate the direction of data transmission.
  • the data transmission can be bidirectional.
  • Display module 1 points to display module 2, that is, the data transmission unit in display module 2 can receive data about the initial brightness value of backlight partition in display module 1), By analogy, the cascade sharing of data of each display module can be realized. Therefore, through the data transmission unit, any display module can receive the initial brightness values of the backlight partitions located at the edges of other backlight modules.
  • the brightness adjuster 620 of any backlight module 20 only needs to be selected.
  • the initial brightness value of the selected backlight zone adjacent to the first backlight zone of the backlight module may be referred to as related data, and the initial brightness value of the first backlight zone located at the edge of the backlight module may be adjusted according to the related data. .
  • the data transmission unit may first receive the initial brightness values of the backlight partitions located at the edges of the backlight module 20b, the backlight module 20c, and the backlight module 20d. That is, the initial brightness values of the backlight partitions n-1 to n-12, the backlight partitions o-1 to o-12, and the backlight partitions p-1 to p-12 are received.
  • the brightness adjuster 620 of the backlight module 20a selects and saves the initial brightness values of the backlight partitions adjacent to the backlight module 20a from the initial brightness values of the backlight partitions, that is, selects the backlight partitions n-4 to n7 and the backlight partition o.
  • the initial brightness value of -1 to o-4 For example, when the first backlight partition is m-1, the initial brightness value of the second backlight partition n-4 is selected, and when the first backlight partition is m-12, the initial brightness value of the second backlight partition is n-5. Brightness value, and so on.
  • the backlight module 20b is the first backlight module
  • the backlight module 20c is the first backlight module
  • the backlight module 20d is the first backlight module
  • the corresponding second backlight can be selected in the same manner. Partition.
  • each display module can receive the initial brightness value of the backlight partition located at the edge of each of the other backlight modules 20 through the data transmission unit, when each backlight module 20 is the first backlight module, The brightness adjuster 620 of each backlight module 20 may select a second backlight partition located at the edge of the second backlight module from the received initial brightness values of the backlight partition located at the edges of each backlight module except the first backlight module. The initial brightness value.
  • one or more of the operations described may constitute a computer program or computer-readable instructions stored on one or more computer-readable storage media, where the computer program or computer-readable instructions are in Execution by a processor or computing device will cause the processor or computing device to perform the operations described.
  • the order in which some or all operations are described should not be interpreted as implying that the operations are necessarily order dependent. Those skilled in the art having the benefit of this description will recognize alternative orderings. In addition, it will be understood that not all operations are necessarily present in every embodiment provided herein.

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Abstract

提供拼接显示装置10及其背光控制方法。拼接显示装置10包括多个显示模组，多个显示模组包括各自的背光模组20，每个背光模组20包括多个背光分区201，多个背光分区201包括第一背光分区o-1，第一背光分区o-1位于各背光模组20中一相应背光模组20的边缘。背光控制方法包括：对于每一背光模组20的第一背光分区：S100获取第一背光分区o-1的初始亮度值a 0以及参考亮度值b 0；S101根据参考亮度值b 0对第一背光分区o-1的初始亮度值a 0进行调整，以得到第一背光分区调整后的亮度值a 1；S102以及根据调整后的亮度值a 1控制第一背光分区的亮度。由此，提高了拼接显示装置10的多个背光模组20间的亮度均一性。

Description

拼接显示装置及其背光控制方法
相关申请
本申请要求于2018年6月27日递交的中国专利申请No.201810681463.7的优先权，在此全文引用上述中国专利申请公开的内容作为本申请的一部分。
技术领域
本公开涉及显示技术领域，尤其涉及一种拼接显示装置及其背光控制方法。
背景技术
拼接显示装置由于通过多个显示模组拼接形成，因而可以实现超大屏、超高分辨率显示。目前，拼接显示装置已经在会议、安防以及监控等领域得到了广泛的应用。
拼接显示装置的每个显示模组包括显示面板和背光模组。显示面板包括多个显示分区。背光模组包括与每个显示分区一一对应的背光分区。在相关技术中，为了实现高动态对比度以及提高暗态下的画面细节显示能力，背光模组常采用3D动态分区调光技术(3D Local Dimming)控制背光，即根据显示画面信息中所包含的亮度信息来动态改变每个背光分区的亮度。每个显示分区的像素灰阶统计亮度决定了与该显示分区对应的背光分区的亮度。
每个显示模组都是根据其所包含的显示面板要显示的画面对相应背光模组的多个背光分区的亮度进行控制。因此，当位于相邻显示模组中的相邻显示分区的像素灰阶统计亮度存在差异时，与相邻显示分区对应的相邻背光分区的亮度间就会存在差异，这进而导致拼接显示装置出现亮度不均一的问题。
发明内容
根据本发明的第一方面，提供了一种拼接显示装置的背光控制方法。该拼接显示装置包括多个显示模组，多个显示模组包括各自的背光模组，每个背光模组包括多个背光分区，多个背光分区包括第一背光分区，第一背光分区位于各背光模组中一相应背光模组的边缘。该方法包括：对于每一背光模组的第一背光分区：获取所述第一背光分区的初始亮度值以及参考亮度值；根据所述参考亮度值对所述第一背 光分区的初始亮度值进行调整，以得到所述第一背光分区调整后的亮度值；以及根据所述调整后的亮度值控制所述第一背光分区的亮度。
在一些实施例中，多个显示模组包括第一显示模组和第二显示模组，第一显示模组包括第一背光模组，第二显示模组包括第二背光模组，第二背光模组包括与位于第一背光模组边缘的第一背光分区相邻且位于第二背光模组边缘的第二背光分区，并且其中，获取位于第一背光模组边缘的第一背光分区的参考亮度值包括：获取第二背光分区的初始亮度值作为位于第一背光模组边缘的第一背光分区的参考亮度值。
在一些实施例中，获取位于相应背光模组边缘的第一背光分区的初始亮度值包括：根据相应背光模组的动态分区调光算法获取位于相应背光模组边缘的第一背光分区的初始亮度值。
在一些实施例中，获取位于相应背光模组边缘的第一背光分区的初始亮度值包括：根据与位于相应背光模组边缘的第一背光分区对应的显示分区的像素灰阶统计亮度获取位于相应背光模组边缘的第一背光分区的初始亮度值。
在一些实施例中，获取第二背光分区的初始亮度值包括：接收位于多个显示模组中除第一背光模组外的各其它背光模组边缘的背光分区的初始亮度值；并且从接收到的初始亮度值中选取位于第二背光模组边缘的第二背光分区的初始亮度值。
在一些实施例中，选取位于第二背光模组边缘的第二背光分区的初始亮度值包括：选取位于第二背光模组边缘且沿至少一个方向与第一背光模组相邻的第二背光分区的初始亮度值。
在一些实施例中，至少一个方向包括水平方向和竖直方向中的至少一个。
在一些实施例中，对第一背光分区的初始亮度值进行调整包括：根据公式：a 1＝a 0*[1-(a 0-b 0)/(a 0+b 0)]，计算得到第一背光分区调整后的亮度值，其中，a 1为第一背光分区调整后的亮度值，a 0为第一背光分区的初始亮度值，b 0为参考亮度值。
根据本发明的第二方面，提供了一种拼接显示装置，包括多个显示模组，多个显示模组包括各自的背光模组，每个背光模组包括多个 背光分区，多个背光分区包括第一背光分区，第一背光分区位于各背光模组中一相应背光模组的边缘，每个背光模组还包括：光源，被配置为发射光，以便输出背光；亮度调整器，被配置为获取第一背光分区的初始亮度值以及参考亮度值，并根据参考亮度值对第一背光分区的初始亮度值进行调整，以得到第一背光分区调整后的亮度值；和控制器，被配置为根据调整后的亮度值驱动光源发射光以控制第一背光分区的亮度。
在一些实施例中，多个显示模组包括第一显示模组和第二显示模组，第一显示模组包括第一背光模组，第二显示模组包括第二背光模组，第二背光模组包括与位于第一背光模组边缘的第一背光分区相邻且位于第二背光模组边缘的第二背光分区，以及其中第一背光模组的亮度调整器被配置为获取第二背光分区的初始亮度值作为位于第一背光模组边缘的第一背光分区的参考亮度值。
在一些实施例中，每个显示模组还包括多个显示分区，多个显示分区与背光模组中多个背光分区中的相应背光分区对应。
在一些实施例中，亮度调整器被配置为根据相应背光模组的动态分区调光算法获取位于相应背光模组边缘的第一背光分区的初始亮度值。
在一些实施例中，亮度调整器被配置为根据与位于相应背光模组边缘的第一背光分区对应的显示分区的像素灰阶统计亮度获取相应背光分区的初始亮度值。
在一些实施例中，多个显示模组按矩阵方式排列，且第一背光模组沿至少一个方向与至少一个第二背光模组相邻。
在一些实施例中，第一显示模组还包括数据传输单元，被配置为将第一背光模组的第一背光分区的初始亮度值传送给显示装置中的一个或多个其它背光模组，以及从第二背光模组接收第二背光分区的初始亮度值。
在一些实施例中，亮度调整器被配置为根据公式：a 1＝a 0*[1-(a 0-b 0)/(a 0+b 0)]，计算得到调整后的亮度值；其中，a 1为第一背光分区调整后的调整亮度值，a 0为第一背光分区的初始亮度值，b 0为参考亮度值。
根据本发明的第三方面，提供了一种计算机可读存储介质，其上存储有计算机程序，该计算机程序被处理器执行时实现上述方法的步骤。
根据本发明的第四方面，提供了一种计算机设备，包括存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，其中处理器执行计算机程序时实现上述方法的步骤。
附图说明
通过参考以下的附图，结合伴随的详细说明，本公开将得到更好的理解，以及本领域技术人员将更加明白本公开的许多目的和优点。
图1为相关技术提供的拼接显示装置的结构示意图；
图2为本公开实施例提供的背光模组的结构示意图；
图3为本公开实施例提供的用于控制背光模组的方法的流程示意图；
图4为本公开实施例提供的显示装置的结构示意图；
图5为本公开实施例提供的用于显示装置的背光控制方法的流程示意图；
图6为本公开实施例提供的背光模组的结构框图；
图7为本公开实施例提供的显示装置中各个显示模组依次级联的结构示意图。
具体实施方式
现在参考附图来描述所要求保护的主题，其中同样的参考数字通常用来贯穿全文地指同样的单元。在以下的描述中，出于说明的目的，阐述了许多具体细节以便提供对所要求保护的主题的理解。然而，显然没有这些具体细节也可以实践所要求保护的主题。在其他实例中，以框图形式图示了结构和设备，以便易于描述所要求保护的主题。
本公开的实施例提供一种背光模组及其控制方法、拼接显示装置及其背光控制方法以及显示模组，其可以提高拼接显示装置的显示亮度均一性。
为达到上述目的，本公开的实施例采用如下技术方案：
图1示出了相关技术提供的拼接显示装置的示意图。如图1所示， 拼接显示装置10由显示模组101和显示模组102拼接形成。显示模组101包括背光分区A，显示模组102包括背光分区B，且背光分区A与背光分区B相邻。显示模组101根据其上要显示的画面且通过3D动态分区调光技术将背光分区A的亮度控制为a。显示模组102根据其上要显示的画面且通过3D动态分区调光技术将背光分区B的亮度控制为b。当与背光分区A对应的显示分区的像素灰阶统计亮度和与背光分区B对应的显示分区的像素灰阶统计亮度存在差异时，亮度a和b之间存在差异，即相邻的背光分区A和背光分区B的亮度存在差异。这样就会导致拼接显示装置的亮度不均一，从而影响了拼接显示装置的显示效果。
图2示出了本公开实施例提供的背光模组的结构示意图。如图2所示，背光模组20包括多个背光分区201。可以根据需要对背光模组20进行划分，以得到不同数量的背光分区201。图2中以背光模组20包括6×8个背光分区201为例进行示意。可以理解，本公开实施例不限于此，而是可以有其他数量的背光分区。背光分区201可以根据其位置被划分为位于背光模组边缘处的边缘背光分区，比如位于背光模组20的上下左右边缘处的背光分区m-1～m-24，和位于中间部分的非边缘背光分区。边缘背光分区在显示模组的拼接过程中可能会与其他显示模组中的其他背光模组的边缘背光分区相邻。
图3示出了本公开实施例提供的用于背光模组的控制方法的流程示意图。如图3所示，背光模组的控制方法包括如下步骤。
S100、获取位于背光模组边缘的第一背光分区的初始亮度值以及参考亮度值。
此处，示例的，第一背光分区可以是例如图2所示的背光分区m-1～m-24中的任一个。
参考亮度值可以是预设的亮度值；也可以是除第一背光分区以外的其它背光分区的初始亮度值。其它背光分区和第一背光分区可以位于同一背光模组中，也可以位于不同背光模组中。示例的，当显示装置为拼接显示装置时，拼接显示装置包括多个背光模组。在这个示例中，参考亮度值可以为第二背光分区的初始亮度值。第二背光分区可以是该背光模组的相邻背光模组边缘处的边缘背光分区，且和第一背光分区相邻。
可以理解，参考亮度值的数量不限于一个；而是可以有两个或更多个。
获取第一背光分区的初始亮度值可以通过不同的方式进行。
在一个实施例中，可以根据背光模组的动态分区调光算法(LD算法)得到位于背光模组边缘的第一背光分区的初始亮度值。
可以理解，当背光模组包括多个背光分区时，背光模组都带有LD功能，且可以通过LD功能控制每个背光分区的亮度。示例性地，根据LD功能中的动态分区调光算法可以计算得到每个背光分区的亮度值，包括计算得到位于背光模组边缘的第一背光分区的初始亮度值。
在另一个实施例中，可以根据与第一背光分区对应的显示分区的像素灰阶统计亮度得到第一背光分区的初始亮度值。
可以理解，显示模组通常包括显示面板和背光模组。显示面板包括多个显示分区。背光模组包括与每个显示分区一一对应的背光分区。显示分区的像素灰阶统计亮度决定了与该显示分区对应的背光分区的初始亮度值。因此在显示面板显示画面时，可以根据与第一背光分区对应的显示分区的像素灰阶统计亮度得到第一背光分区的初始亮度值。
S101、根据参考亮度值对第一背光分区的初始亮度值进行调整，以得到第一背光分区调整后的亮度值。
在一些实施例中，在对第一背光分区的初始亮度值进行调整时，可以根据一个参考亮度值进行调整；也可以根据两个或更多个参考亮度值进行调整。
可以理解，调整可以以任何适用的、使得能够减小第一背光分区调整后的亮度值与参考亮度值的差异的方式进行。
可选地，第一背光分区调整后的亮度值a 1可以根据公式：a 1＝a 0*[1-(a 0-b 0)/(a 0+b 0)]计算得到；其中，a 0为第一背光分区的初始亮度值，而b 0为参考亮度值。
可以理解，当根据两个或多个参考亮度值对一个第一背光分区的初始亮度值进行调整时，b 0可以为两个或更多个参考亮度值的平均值；也可以为从两个或多个参考亮度值中选择的一个参考亮度值。
按照本公开实施例，在根据公式a 1＝a 0*[1-(a 0-b 0)/(a 0+b 0)]对第一背光分区的亮度值进行调整时，第一背光分区调整后的亮度值随参考亮度值变化。由于当第一背光分区初始亮度值小于参考亮度值时，其经调整后的亮度值将大于初始亮度值，也即朝向参考亮度值增大，且反之亦然，因而第一背光分区调整后的亮度值与参考亮度值的差异会减小。
S102、根据调整后的亮度值控制第一背光分区输出相应的背光亮度。
在一些实施例中，当多个显示模组被拼接在一起形成拼接显示装置时，每个显示模组包括的背光模组均可以按照前文所述的背光模组的控制方法来进行控制。这样可以减小相邻背光模组中的相邻背光分区的亮度值之间的差异。示例地，若第一背光分区位于第一背光模组边缘，参考亮度值可以为拼接显示装置中位于与第一背光模组相邻的第二背光模组边缘的第二背光分区的初始亮度值。第二背光分区与第一背光分区相邻。按照本公开实施例，在拼接显示装置中，第一背光模组中的第一背光分区的亮度值的调整参考了与之相邻的第二背光模组中的第二背光分区的初始亮度值。这样，相邻背光分区调整后的亮度值间的差异性可以减小，从而实现了对跨背光模组的相邻背光分区亮度值的调整，且由此改善了拼接显示装置的亮度均一性。
可以理解，当拼接显示装置中显示面板显示的画面发生变化时，第一背光分区的初始亮度值会发生变化。由此，按照本公开实施例的亮度值调整可以在检测到第一背光分区的初始亮度值发生变化时进行。附加地，按照本公开实施例的亮度值调整还可以在检测到参考亮度值发生变化时进行。附加地或者替换地，按照本公开实施例的亮度值调整还可以按照一定的时间间隔进行。这样，可以响应于第一背光分区的初始亮度值和参考亮度值的变化而对第一背光分区的亮度值进行动态实时的调整。
如图4所示，拼接显示装置10包括多个显示模组。每个显示模组会与相邻的n≤4片显示模组形成拼接关系。每个显示模组包括显示面板和背光模组20(图4中未示出显示面板，以拼接显示装置10包括2×2＝4个背光模组20a、20b、20c和20d为例进行示意)。
所述拼接显示装置10的背光控制方法包括：每个背光模组20a、 20b、20c和20d的控制方法均按照上述背光模组的控制方法执行。第一背光分区位于第一背光模组边缘。参考亮度值为位于第二背光模组边缘的第二背光分区的初始亮度值。第二背光模组为多个背光模组20中与第一背光模组相邻的一个，且第二背光分区与第一背光分区相邻。
可以理解，当拼接显示装置10包括多个显示模组，每个显示模组包括背光模组20时，为了实现拼接，在一些实施例中，拼接显示装置10中各个背光模组20的尺寸相同，且相邻背光模组20的相邻边缘包括的背光分区201的数量相同。
示例的，如图4所示，当拼接显示装置10包括四个背光模组20，分别为背光模组20a、背光模组20b、背光模组20c以及背光模组20d时，背光模组20a、背光模组20b、背光模组20c以及背光模组20d的控制方法均按照上述背光模组的控制方法执行。当背光模组20a为第一背光模组时，第一背光分区可以为m-1、m-7到m-12，第二背光模组可以为背光模组20b和背光模组20c。在背光模组20b的控制方法按照上述背光模组的控制方法执行时，背光模组20b为第一背光模组，依次类推。
此处，对于位于相邻背光模组中的相邻背光分区，可以同时调整相邻背光分区的初始亮度值，也可以先对相邻背光分区的一个背光分区的初始亮度值进行调整，再对另一个背光分区的初始亮度值进行调整。对于位于相邻背光模组中的相邻背光分区，无论同时调整还是依次调整，当提及其中一个背光分区的初始亮度值时，指的是该背光分区的调整前的亮度值，而与调整后的亮度值无关。
在拼接显示装置10中，对任一背光模组的第一背光分区进行调整时，与第一背光分区相邻的第二背光分区可以有一个或多个。示例的，如图4所示，对于背光模组20c中的第一背光分区o-2进行调整时，第一背光模组为背光模组20c，此时第二背光分区为位于背光模组20a中的背光分区m-9。对于背光模组20c中的第一背光分区o-1进行调整时，第二背光分区为位于背光模组20a中的背光分区m-10、位于背光模组20d中的背光分区p-4。在一些实施例中，对于第一背光分区o-1，第二背光分区还可以是位于背光模组20b中的背光分区n-7。
基于此，在对第一背光分区的初始亮度值进行调整时，若与第一背光分区相邻的第二背光分区有一个，则根据这一个第二背光分区的 初始亮度值对第一背光分区的初始亮度值进行调整。若第一背光分区与多个第二背光分区相邻，可以根据多个第二背光分区中的一个第二背光分区的初始亮度值对第一背光分区的初始亮度值进行调整，也可以根据多个第二背光分区的初始亮度值对第一背光分区的初始亮度值进行调整。在一些实施例中，可以根据该多个第二背光分区的初始亮度的平均值对第一背光分区的初始亮度值进行调整。示例地，如图4所示，对于背光模组20c中的第一背光分区o-1进行调整时，可以根据位于背光模组20d中的背光分区p-4的初始亮度值对第一背光分区o-1的初始亮度值进行调整；或者可以根据位于背光模组20a中的背光分区m-10的初始亮度值对第一背光分区o-1的初始亮度值进行调整。替换地，还可以根据位于背光模组20a中的背光分区m-10的初始亮度值和位于背光模组20d中的背光分区p-4的初始亮度值两者对第一背光分区o-1的初始亮度值进行调整。
在此基础上，由于位于每个背光模组20边缘的背光分区的亮度值都可以根据位于相邻背光模组中、且与该背光分区相邻的背光分区的初始亮度值进行调整，因而位于相邻背光模组边缘的相邻背光分区调整后的亮度值的差异减小，也即位于相邻背光模组边缘的相邻背光分区调整后的亮度值趋向于接近。示例的，背光模组20a和背光模组20b相邻，背光模组20a中的背光分区m-12和背光模组20b中的背光分区n-5相邻，背光分区m-12的初始亮度值为s 0，背光分区n-5的初始亮度值为t 0，根据背光分区n-5的初始亮度值t 0对背光分区m-12的初始亮度值s 0调整的同时，可以根据背光分区m-12的初始亮度值s 0对背光分区n-5的初始亮度值t 0调整。这样一来，背光分区m-12调整后的亮度值和背光分区n-5调整后的亮度值的差异会减小。进一步的，若根据上述公式：a 1＝a 0*[1-(a 0-b 0)/(a 0+b 0)]，计算得到第一背光分区调整后的亮度值，则背光分区m-12调整后的亮度值s 1＝s 0*[1-(s 0-t 0)/(s 0+t 0)]，背光分区n-5调整后的亮度值t 1＝t 0*[1-(t 0-s 0)/(t 0+s 0)]。可以看出，背光分区m-12调整后的亮度值参考了相邻背光分区n-5的初始亮度值，背光分区n-5调整后的亮度值参考了相邻背光分区m-12的初始亮 度值。而且在经调整后，初始亮度值较大的背光分区的亮度值将朝向另一背光分区的初始亮度值减小且反之亦然(一般而言，s 0与t 0不相等)，因此背光分区m-12调整后的亮度值和背光分区n-5调整后的亮度值相对于背光分区m-12的初始亮度值和背光分区n-5的初始亮度值的差异减小。理想情况下，背光分区m-12和背光分区n-5的调整后的亮度值将相等，为2t 0s 0/(t 0+s 0)。
可以理解，对于相邻背光模组20的相邻边缘，由于位于相邻背光模组20中的相邻背光分区201调整后的亮度值的差异性减小，因此相邻背光模组20的相邻边缘的亮度值的差异性减小。示例的，如图4所示，背光模组20a的下边缘与背光模组20c的上边缘相邻。由于根据背光分区o-4对背光分区m-7调整后的亮度值与根据背光分区m-7对背光分区o-4调整后的亮度值的差异性减小、根据背光分区o-3对背光分区m-8调整后的亮度值与根据背光分区m-8对背光分区o-3调整后的亮度值的差异性减小、根据背光分区o-2对背光分区m-9调整后的亮度值与根据背光分区m-9对背光分区o-2调整后的亮度值的差异性减小以及根据背光分区o-1对背光分区m-10调整后的亮度值与根据背光分区m-10对背光分区o-1调整后的亮度值的差异性减小，所以背光模组20a的下边缘与背光模组20c的上边缘的亮度差异性减小。
在拼接显示装置10中，在对位于任一背光模组边缘的背光分区的初始亮度值进行调整时，可以对位于该背光模组边缘的多个背光分区中与位于相邻背光模组边缘的背光分区相邻的一个背光分区201或几个背光分区201的初始亮度值进行调整。被调整的背光分区可以被称为第一背光分区。即位于背光模组20边缘的多个背光分区201中与位于相邻背光模组边缘的背光分区相邻的背光分区201中的一个或多个背光分区201可以作为第一背光分区。示例的，如图4所示，背光模组20a中与位于相邻背光模组边缘的背光分区相邻的背光分区包括m-7～m-12以及m-1，可以对背光分区m-7～m-12以及m-1中的一个或多个背光分区的初始亮度值进行调整，即背光分区m-7～m-12以及m-1中的一个或多个可以作为第一背光分区。
可选地，位于一背光模组20边缘的多个背光分区201中与位于相邻背光模组20边缘的背光分区201相邻的背光分区201均作为第一背 光分区。在一些实施例中，所有第一背光分区的初始亮度值都被进行调整。在另一实施例中，仅当第一背光分区的初始亮度值与参考亮度值的差值大于某个阈值时，才进行亮度值的调整。这样可以节省用于亮度调整的处理资源，提高整个背光模组的亮度调整的响应速度。
在本公开实施例中，由于位于一背光模组边缘的多个背光分区中与位于相邻背光模组边缘的背光分区相邻的背光分区均作为第一背光分区而被调整，因而相当于对于位于一背光模组边缘的多个背光分区中与位于相邻背光模组边缘的背光分区相邻的背光分区的初始亮度值均进行了调整，从而可以减小不同背光模组的相邻背光分区之间的亮度值差异，进而确保拼接显示装置的亮度均一性。
在本公开实施例中，当拼接显示装置中每个背光模组20的控制方法均按照上述背光模组的控制方法执行时，可以采用任何适用的方式来对于每个背光模组获取参考亮度值(例如，位于第二背光模组边缘的第二背光分区的初始亮度值)。可选地，可以接收位于除第一背光模组外各背光模组20边缘的背光分区的初始亮度值，并从接收到的初始亮度值中选取位于第二背光模组边缘的第二背光分区的初始亮度值，其中第二背光模组与第一背光模组相邻，并且第二背光分区与第一背光分区相邻。
此处，每个背光模组20都可以先获取位于其它背光模组边缘的背光分区的初始亮度值，再从位于其它背光模组边缘的背光分区的初始亮度值中选取与该背光模组20的边缘处的背光分区相邻的背光分区的初始亮度值。示例的，如图4所示，当背光模组20a为第一背光模组时，背光模组20a先获取位于背光模组20b、背光模组20c以及背光模组20d边缘的背光分区201的初始亮度值，即获取背光分区n-1～n-12、背光分区o-1～o-12以及背光分区p-1～p-12的初始亮度值，再从这些背光分区201的初始亮度值中选取与背光模组20a的边缘处的背光分区(例如m1～m-12)相邻的背光分区的初始亮度值并保存，例如选取背光分区n-4～n7以及背光分区o-1～o-4的初始亮度值。进一步的，第一背光分区为m-1时，选取第二背光分区n-4的初始亮度值；第一背光分区为m-12时，选取第二背光分区为n-5的初始亮度值；依次类推。同理，当背光模组20b为第一背光模组、背光模组20c为第一背光模组或背光模组20d为第一背光模组时，可以采用同样的方式为其第一 背光分区分别选择相应的第二背光分区。
在本公开实施例中，由于每个背光模组20都可以接收位于其它各背光模组20边缘的背光分区的初始亮度值，因而在每个背光模组20为第一背光模组时，每个背光模组20都可以获取到相应的位于第二背光模组边缘的第二背光分区的初始亮度值。
由于根据两个或多个第二背光分区的初始亮度值对第一背光分区的初始亮度值进行调整会使得调整过程复杂，因而在本公开的一些实施例中，当背光模组20包括按矩阵方式排列的多个背光分区201时，在第一背光模组与多个第二背光模组相邻、第一背光分区与多个第二背光分区相邻的情况下，选择多个背光模组20中沿水平方向或竖直方向与第一背光模组相邻的背光模组作为第二背光模组，并且相应地选择该第二背光模组中的沿水平方向或竖直方向与第一背光分区相邻的背光分区作为第二背光分区。
在拼接显示装置形成的平面中，水平方向可以包括水平向左的方向和水平向右的方向，竖直方向可以包括与水平方向垂直的向上的方向和向下的方向。
示例的，参考图4，当第一背光模组为背光模组20c，第一背光分区为o-1时，此时若第二背光模组为沿水平方向与第一背光模组相邻的背光模组20d，则第二背光分区为p-4；若第二背光模组为沿竖直方向与第一背光模组相邻的背光模组20a，则第二背光分区为m-10。
可以理解，对于任一背光模组20为第一背光模组时，第二背光模组可以为沿水平方向与第一背光模组相邻的背光模组；也可以为沿竖直方向与第一背光模组相邻的背光模组。在本公开实施例中，可选地，在拼接显示装置10中的每个背光模组20作为第一背光模组时，可以均选择沿水平方向与第一背光模组相邻的背光模组作为第二背光模组，或者均选择沿竖直方向与第一背光模组相邻的背光模组作为第二背光模组。示例地，如图4所示，当选择沿竖直方向与第一背光模组相邻的背光模组作为第二背光模组时，背光模组20a为第一背光模组时，背光模组20c为第二背光模组；背光模组20c为第一背光模组时，背光模组20a为第二背光模组；背光模组20b为第一背光模组时，背光模组20d为第二背光模组；背光模组20d为第一背光模组时，背光模组20b为第二背光模组。
在本公开实施例中，由于第二背光模组为多个背光模组20中沿水平方向或竖直方向与第一背光模组相邻的背光模组，因而对于位于第一背光模组边缘的第一背光分区，只有一个与其相邻的第二背光分区，因而只需根据这一个第二背光分区的初始亮度值对第一背光分区的初始亮度值进行调整，从而简化了对第一背光分区的初始亮度值调整的过程。
图5示出了按照本公开实施例的拼接显示装置10的背光控制方法。如图5所示，在S200、拼接显示装置10中每个背光模组20获取位于其边缘的背光分区的初始亮度值。可选地，可以仅获取与存在相邻背光模组的边缘处的背光分区的初始亮度值。这样，有助于减小待处理的数据量，从而提高处理速度。在S201、每个背光模组20还获取位于拼接显示装置中其它背光模组边缘的背光分区的初始亮度值。可选地，可以仅获取与其相邻的背光模组边缘的背光分区的初始亮度值。在一些实施例中，还可以仅获取在特定的一个或多个方向上与其相邻的背光模组变成的背光分区的初始亮度值。在S202、每个背光模组20分别作为第一背光模组，从位于其它背光模组边缘的背光分区的初始亮度值中选取与位于第一背光模组边缘的第一背光分区相邻的背光分区的初始亮度值。在一些实施例中，可以仅选取在特定的一个或多个方向上与第一背光分区相邻的背光分区的初始亮度值。在S203、根据与位于第一背光模组边缘的第一背光分区相邻的背光分区的初始亮度值对位于第一背光模组边缘的第一背光分区的初始亮度值进行调整，以对位于每个背光模组边缘的背光分区的初始亮度值进行调整。在S204、根据位于背光模组边缘的背光分区调整后的亮度值输出相应的背光亮度。
图6示出了本公开实施例提供的一种背光模组600。如图6所示，背光模组600包括光源610、亮度调整器620和控制器630。
光源610被配置为发射光。可选地，光源610可以是例如白炽灯泡、电光面板(ELP)、发光二极管(LED)、冷阴极管(CCFL)等。
亮度调整器620被配置为获取位于背光模组600边缘的第一背光分区的初始亮度值以及参考亮度值，并根据参考亮度值对第一背光分区的初始亮度值进行调整，以得到第一背光分区调整后的亮度值。
可以理解，亮度调整器620可以通过处理器来实现。处理器30例 如可以是SOC(System on Chip，系统级芯片)等。
亮度调整器620被配置为采用任何适用的方式来获取位于背光模组边缘的第一背光分区的初始亮度值。
在一个示例中，亮度调整器620被配置为根据背光模组的动态分区调光算法得到位于背光模组边缘的第一背光分区的初始亮度值。
在这个示例中，背光模组20包括多个背光分区201，并且背光模组20带有LD功能时，通过LD功能控制每个背光分区的亮度。基于此，由于根据LD功能中的动态分区调光算法可以计算得到每个背光分区的亮度值，因此亮度调整器620可以根据背光模组的动态分区调光算法得到位于背光模组边缘的第一背光分区的初始亮度值。在一些实施例中，LD功能中的动态分区调光算法的程序可以被集成在背光模组20的亮度调整器620上，也可以被设置在单独的LD处理器(与亮度调整器620不同的处理器)上。LD处理器可以与背光模组20的亮度调整器620可通信地连接。在后一种情况下，可以先根据LD处理器中的动态分区调光算法计算得到位于背光模组边缘的第一背光分区的初始亮度值，再将得到的第一背光分区的初始亮度值传输给背光模组20的亮度调整器620。在一个示例中，可以通过SPI(Serial Peripheral Interface，串行外设接口)串口数据将第一背光分区的初始亮度值传输给亮度调整器620。
在另一示例中，亮度调整器620可被配置为根据与位于背光模组边缘的第一背光分区对应的显示分区的像素灰阶统计亮度得到第一背光分区的初始亮度值。
在一些实施例中，显示模组包括显示面板和背光模组。显示面板包括多个显示分区。背光模组20包括与每个显示分区对应的背光分区201。由于显示分区的像素灰阶统计亮度决定了与该显示分区对应的背光分区201的初始亮度值，因此在第一背光模组显示画面时，亮度调整器620可以根据与位于第一背光模组边缘的第一背光分区对应的显示分区的像素灰阶统计亮度得到第一背光分区的初始亮度值。
亮度调整器620除了可以得到位于第一背光模组边缘的第一背光分区的初始亮度值外，还可以得到位于第一背光模组其它位置的背光分区的初始亮度值。亮度调整器620可以在显示面板显示画面时，先根据多个显示分区的像素灰阶统计亮度得到多个背光分区的初始亮度 值，再从多个背光分区的初始亮度值中选取位于第一背光模组边缘的第一背光分区的初始亮度值。
在本公开实施例中，亮度调整器620可以以任何适用的方式来根据参考亮度值对第一背光分区的初始亮度值进行调整，以使得第一背光分区调整后的亮度值与参考亮度值的差异能够减小。可选地，亮度调整器620，被配置为根据公式：a 1＝a 0*[1-(a 0-b 0)/(a 0+b 0)]，计算得到第一背光分区调整后的亮度值；其中，a1为第一背光分区调整后的亮度值，a0为第一背光分区的初始亮度值，b 0为参考亮度值。
按照本公开实施例，由于根据公式a 1＝a 0*[1-(a 0-b 0)/(a 0+b 0)]对第一背光分区的亮度值进行调整时，第一背光分区调整后的亮度值与参考亮度值有关，并且使第一背光分区的亮度值朝向参考亮度值变化，因而第一背光分区调整后的亮度值与参考亮度值的差异会减小。
控制器630被配置为从亮度调整器620接收第一背光分区调整后的亮度值，并且根据接收到的调整后的亮度值控制光源610的发射以使得第一背光分区输出相应的背光亮度。控制器630例如可以是背光驱动控制MCU(Microcontroller Unit，微控制单元)。
在亮度调整器620(例如SOC)将得到的第一背光分区调整后的亮度值传输给控制器40(例如背光驱动控制MCU)后，控制器40可以根据第一背光分区调整后的亮度值驱动光源610发射光以控制第一背光分区输出相应的背光亮度。
可以理解，在上文中针对图2到图5讨论的所有可能性对于图6也是有效的。
本公开实施例还提供了一种显示模组，包括显示面板和上述的背光模组。显示面板包括多个显示分区，一个显示分区与一个背光分区对应。
显示面板可以采用任何适用的类型。示例的，显示面板可以是液晶显示面板或电泳显示面板等任意非自主发光的显示面板。
本公开实施例还提供一种显示装置10，包括被拼接在一起的多个上述的显示模组。第一背光分区位于该显示模组中的第一背光模组的边缘参考亮度值为位于该显示模组中的第二背光模组边缘的第二背光 分区的初始亮度值。第二背光模组与该第一背光模组相邻，且第二背光分区与第一背光分区相邻。
可以理解，当拼接显示装置10包括多个显示模组时，为了实现拼接，可以使得多个显示模组中各个背光模组20的尺寸相同，且相邻背光模组20的相邻边缘包括的背光分区201的数量相同。
在一些实施例中，当位于第一背光模组边缘的第一背光分区与多个第二背光分区相邻，第二背光分区位于第二背光模组的边缘，且第二背光模组与第一背光模组相邻时，可以根据多个第二背光分区中的一个或多个对第一背光模组边缘的第一背光分区的亮度值进行调整。
在这些实施例中，由于显示模组中位于每个背光模组20边缘的背光分区的亮度值都可以根据其相邻背光模组中与该背光分区相邻的背光分区的初始亮度值进行调整，因而经调整后，位于相邻背光模组边缘的相邻背光分区之间的亮度值的差异减小，也即位于相邻背光模组边缘的相邻背光分区调整后的亮度值趋向于接近。示例地，如图4所示，背光模组20a和背光模组20b相邻，背光模组20a中的背光分区m-12和背光模组20b中的背光分区n-5相邻，背光分区m-12的初始亮度值为s 0，背光分区n-5的初始亮度值为t 0。这样，在根据背光分区n-5的初始亮度值t 0对背光分区m-12的初始亮度值s 0调整以使背光分区n-5的亮度值朝向s 0变化的同时，可以根据背光分区m-12的初始亮度值s 0对背光分区n-5的初始亮度值t 0调整以使背光分区m-12的亮度值朝向t 0变化。由此，在经调整后，背光分区m-12的亮度值和背光分区n-5之间的亮度值的差异会减小。
按照本公开实施例，在经调整后，相邻背光模组中相邻背光分区之间的亮度值的差异性减小。这使得多个背光模组20间的亮度均一性得到了改善，因而本公开实施例提供的拼接显示装置的亮度均一性得到改善，从而提高了拼接显示装置的显示效果。
可选地，在拼接显示装置中，一背光模组边缘的多个背光分区中与位于相邻背光模组边缘的背光分区相邻的背光分区均可以作为第一背光分区。
本公开实施例中，由于位于一背光模组边缘的多个背光分区中与位于相邻背光模组边缘的背光分区相邻的背光分区均可以作为第一背光分区，因而可以对位于一背光模组边缘的多个背光分区中与位于相 邻背光模组边缘的背光分区相邻的每个背光分区进行调整，以确保拼接显示装置的亮度均一性。
若第一背光分区与多个第二背光分区相邻，则在对第一背光分区的初始亮度值进行调整时，可以根据其中一个第二背光分区的初始亮度值对第一背光分区的初始亮度值进行调整，替换地，也可以根据两个或多个第二背光分区的初始亮度值对第一背光分区的初始亮度值进行调整。在一些实施例中，为了简化第一背光分区的初始亮度值的调整，在背光模组20包括按矩阵方式排列的多个背光分区201，在第一背光模组与多个第二背光模组相邻、第一背光分区与多个第二背光分区相邻的情况下，可以选择多个背光模组20中沿某一方向(例如水平方向或竖直方向)与第一背光模组相邻的背光模组作为第二背光模组，并且相应地选择该第二背光模组中的沿该方向与第一背光分区相邻的背光分区作为第二背光分区。
本公开实施例中，由于第二背光模组为多个背光模组20中沿水平方向或竖直方向与第一背光模组相邻的背光模组，因而对于位于第一背光模组边缘的第一背光分区，只有一个与其相邻的第二背光分区。这样使得只需根据这一个第二背光分区的初始亮度值对第一背光分区的初始亮度值进行调整，从而简化了对第一背光分区的初始亮度值调整的过程。
每个背光模组中的亮度调整器620可以采用任何适用的方式获取位于第二背光模组边缘的第二背光分区的初始亮度值来作为参考亮度值。可选地，每个显示模组还包括：数据传输单元。数据传输单元被配置为从其它显示模组接收其它显示模组的背光模组边缘的背光分区的初始亮度值以及将其自己的背光模块边缘的背光分区的初始亮度值传输给其它显示模组。亮度调整器620还用于从接收到的位于除第一背光模组外各背光模组边缘的背光分区的初始亮度值中选取位于第二背光模组边缘的第二背光分区的初始亮度值。
数据传输单元可以采用任何适用的类型。数据传输单元例如可以采用有线传输类型，例如数据线或无线传输类型，例如蓝牙等。
在一些实施例中，当拼接显示装置10中各个显示模组通过以太网接口、串口或DVI/HDMI等接口中的连接线连接时，由于每个显示模组都包括数据传输单元，因而任一显示模组的数据传输单元都可以接 收到位于其它各背光模组边缘的背光分区的初始亮度值。此外，对于拼接显示装置中各个显示模组之间如何连接不进行限定，以使任一显示模组的数据传输单元都可以接收到位于其它各背光模组边缘的背光分区的初始亮度值为准。示例的，如图7所示，各个显示模组1-9可以通过网线、串口或DVI/HDMI等接口中的数据线依次级联(图7中的箭头表示数据传输的方向。如图7所示，数据的传输可以是双向的。显示模组1指向显示模组2，即显示模组2中的数据传输单元可以接收到显示模组1中的关于背光分区的初始亮度值的数据)，以此类推，从而可以实现各个显示模组数据的级联共享。因此通过数据传输单元，任一显示模组都可以接收到位于其它各背光模组边缘的背光分区的初始亮度值。
可以理解，由于相邻显示模组之间的亮度差异主要体现为在相邻背光模组的边缘处的相邻背光分区的亮度差异，因而任一背光模组20的亮度调整器620只需选取与该背光模组的第一背光分区相邻的背光分区即第二背光分区的初始亮度值即可。所选取的与该背光模组的第一背光分区相邻的背光分区的初始亮度值可以称为关联数据，根据关联数据可以对位于该背光模组边缘的第一背光分区的初始亮度值进行调整。
示例地，返回图4，当背光模组20a为第一背光模组时，数据传输单元可以先接收位于背光模组20b、背光模组20c以及背光模组20d边缘的背光分区的初始亮度值，即接收背光分区n-1～n-12、背光分区o-1～o-12以及背光分区p-1～p-12的初始亮度值。背光模组20a的亮度调整器620再从这些背光分区的初始亮度值中选取与背光模组20a相邻的背光分区的初始亮度值并保存，即选取背光分区n-4～n7以及背光分区o-1～o-4的初始亮度值。示例性地，当第一背光分区为m-1时，选取第二背光分区n-4的初始亮度值，当第一背光分区为m-12时，选取第二背光分区为n-5的初始亮度值，依次类推。同理，当背光模组20b为第一背光模组、背光模组20c为第一背光模组或背光模组20d为第一背光模组时，可以采用同样的方式来选取相应的第二背光分区。
本公开实施例，由于每个显示模组都可以通过数据传输单元接收位于其它各背光模组20边缘的背光分区的初始亮度值，因而在每个背光模组20为第一背光模组时，每个背光模组20的亮度调整器620可 以从接收到的位于除第一背光模组外各背光模组边缘的背光分区的初始亮度值中选取位于第二背光模组边缘的第二背光分区的初始亮度值。
本文提供了实施例的各种操作。在一个实施例中，所描述的操作中的一个或多个操作可以构成存储于一个或多个计算机可读存储介质上的计算机程序或者计算机可读指令，所述计算机程序或者计算机可读指令在由处理器或者计算设备执行的情况下将使处理器或者计算设备执行所描述的操作。描述某些或全部操作的次序不应被解读成暗指这些操作必然是依赖次序的。得益于本说明的本领域技术人员将会意识到可替换的排序。另外，将理解，并不是所有的操作都必然存在于本文提供的每个实施例中。
以上所述，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以所述权利要求的保护范围为准。

Claims (18)

  1. 一种拼接显示装置的背光控制方法，所述拼接显示装置包括多个显示模组，所述多个显示模组包括各自的背光模组，每个背光模组包括多个背光分区，所述多个背光分区包括第一背光分区，所述第一背光分区位于各所述背光模组中一相应背光模组的边缘，所述方法包括：
    对于每一背光模组的第一背光分区：
    获取所述第一背光分区的初始亮度值以及参考亮度值；
    根据所述参考亮度值对所述第一背光分区的初始亮度值进行调整，以得到所述第一背光分区调整后的亮度值；以及
    根据所述调整后的亮度值控制所述第一背光分区的亮度。
  2. 根据权利要求1所述的方法，
    其中，所述多个显示模组包括第一显示模组和第二显示模组，所述第一显示模组包括第一背光模组，所述第二显示模组包括第二背光模组，所述第二背光模组包括与位于所述第一背光模组边缘的第一背光分区相邻且位于所述第二背光模组边缘的第二背光分区，并且
    其中获取位于所述第一背光模组边缘的第一背光分区的参考亮度值包括：
    获取所述第二背光分区的初始亮度值作为位于所述第一背光模组边缘的所述第一背光分区的参考亮度值。
  3. 根据权利要求1或2所述的方法，其中，获取位于所述相应背光模组边缘的第一背光分区的初始亮度值包括：
    根据所述相应背光模组的动态分区调光算法获取位于所述相应背光模组边缘的所述第一背光分区的初始亮度值。
  4. 根据权利要求1或2所述的方法，其中，获取位于所述相应背光模组边缘的第一背光分区的初始亮度值包括：
    根据与位于所述相应背光模组边缘的第一背光分区对应的显示分区的像素灰阶统计亮度获取位于所述相应背光模组边缘的所述第一背光分区的初始亮度值。
  5. 根据权利要求2所述的方法，其中，获取所述第二背光分区的 初始亮度值包括：
    接收位于所述多个显示模组中除所述第一背光模组外的各其它背光模组边缘的背光分区的初始亮度值；并且
    从接收到的初始亮度值中选取位于所述第二背光模组边缘的所述第二背光分区的初始亮度值。
  6. 根据权利要求5所述的方法，其中，选取所述位于第二背光模组边缘的所述第二背光分区的初始亮度值包括：
    选取位于所述第二背光模组边缘且沿至少一个方向与所述第一背光模组相邻的第二背光分区的初始亮度值。
  7. 根据权利要求6所述的方法，其中，所述至少一个方向包括水平方向和竖直方向中的至少一个。
  8. 根据权利要求1或2所述的方法，其中，对所述第一背光分区的初始亮度值进行调整包括：
    根据公式：a 1＝a 0*[1-(a 0-b 0)/(a 0+b 0)]，计算得到所述第一背光分区调整后的亮度值，
    其中，a 1为所述第一背光分区调整后的亮度值，a 0为所述第一背光分区的初始亮度值，b 0为所述参考亮度值。
  9. 一种拼接显示装置，包括多个显示模组，所述多个显示模组包括各自的背光模组，每个背光模组包括多个背光分区，所述多个背光分区包括第一背光分区，所述第一背光分区位于各所述背光模组中一相应背光模组的边缘，所述每个背光模组还包括：
    光源，被配置为发射光，以便输出背光；
    亮度调整器，被配置为获取所述第一背光分区的初始亮度值以及参考亮度值，并根据所述参考亮度值对所述第一背光分区的初始亮度值进行调整，以得到所述第一背光分区调整后的亮度值；和
    控制器，被配置为根据所述调整后的亮度值驱动所述光源发射光以控制所述第一背光分区的亮度。
  10. 根据权利要求9所述的显示装置，
    其中，所述多个显示模组包括第一显示模组和第二显示模组，所述第一显示模组包括第一背光模组，所述第二显示模组包括第二背光模组，所述第二背光模组包括与位于所述第一背光模组边缘的第一背 光分区相邻且位于所述第二背光模组边缘的第二背光分区，以及
    其中所述第一背光模组的亮度调整器被配置为获取所述第二背光分区的初始亮度值作为位于所述第一背光模组边缘的所述第一背光分区的参考亮度值。
  11. 根据权利要求9所述的显示装置，每个所述显示模组还包括多个显示分区，所述多个显示分区与所述背光模组中所述多个背光分区中的相应背光分区对应。
  12. 根据权利要求9至11中任一项所述的显示装置，其中，所述亮度调整器被配置为根据相应背光模组的动态分区调光算法获取位于所述相应背光模组边缘的第一背光分区的初始亮度值。
  13. 根据权利要求9至11中任一项所述的显示装置，其中，所述亮度调整器被配置为根据与位于所述相应背光模组边缘的第一背光分区对应的显示分区的像素灰阶统计亮度获取所述相应背光分区的初始亮度值。
  14. 根据权利要求10所述的显示装置，其中，所述多个显示模组按矩阵方式排列，且所述第一背光模组沿至少一个方向与至少一个第二背光模组相邻。
  15. 根据权利要求10所述的显示装置，其中，第一显示模组还包括数据传输单元，被配置为将所述第一背光模组的所述第一背光分区的初始亮度值传送给所述显示装置中的一个或多个其它背光模组，以及从所述第二背光模组接收所述第二背光分区的初始亮度值。
  16. 根据权利要求9至11中任一项所述的显示装置，其中，所述亮度调整器被配置为根据公式：a 1＝a 0*[1-(a 0-b 0)/(a 0+b 0)]，计算得到所述调整后的亮度值；
    其中，a 1为所述第一背光分区调整后的调整亮度值，a 0为所述第一背光分区的初始亮度值，b 0为所述参考亮度值。
  17. 一种计算机可读存储介质，其上存储有计算机程序，该计算机程序被处理器执行时实现根据权利要求1-8中任一项的方法的步骤。
  18. 一种计算机设备，包括存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，其中所述处理器执行所述计算机程序时实现根据权利要求1-8中任一项的方法的步骤。
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