CN109686325A - Liquid crystal-spliced display module, the control system and method for liquid crystal-spliced display module - Google Patents
Liquid crystal-spliced display module, the control system and method for liquid crystal-spliced display module Download PDFInfo
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- CN109686325A CN109686325A CN201910160956.0A CN201910160956A CN109686325A CN 109686325 A CN109686325 A CN 109686325A CN 201910160956 A CN201910160956 A CN 201910160956A CN 109686325 A CN109686325 A CN 109686325A
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- local dimming
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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
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Abstract
The embodiment of the present application provides a kind of liquid crystal-spliced display module, the control system and method for liquid crystal-spliced display module, and control system includes: General controller and multiple sub- control assemblies.Sub- control assembly corresponds to the backlight module in liquid crystal-spliced display module.Sub- control assembly includes signal controller and backlight driver module, and signal controller is electrically connected with backlight driver module, and backlight driver module with each luminescence unit in backlight module for being electrically connected.Signal controller is electrically connected with General controller, for receiving the master control signal of General controller output, according to the original local dimming subsignal in master control signal, determines the target local dimming subsignal for adapting to target local dimming region；Target local dimming subsignal is sent to backlight driver module, so that the luminescence unit in backlight driver module driving target local dimming region executes local dimming.Signal controller can replace the partial function of display driver, reduce the cost of liquid crystal-spliced display module.
Description
Technical field
This application involves the technical fields of liquid crystal display, specifically, this application involves a kind of liquid crystal-spliced display module,
The control system and method for liquid crystal-spliced display module.
Background technique
Liquid crystal-spliced mould group is that one kind can be according to different use demands, and realization picture segmentation single screen is shown or multihead display
Display equipment, such as may be implemented: single screen segmentation display, single screen is individually shown, any combination is shown, full frame liquid crystal-spliced
Deng.Liquid crystal-spliced mould group includes multiple display devices, and multiple display devices are stitched together with a matrix type.
In order to increase contrast and promote image quality, liquid crystal-spliced mould group usually all has local dimming function, and part is adjusted
The backlight illumination in constituent parts region in the adjustable liquid crystal-spliced each display unit of mould group of light function.In the prior art, it shows
Display driver in device receives the master control signal that master controller is sent, and executes the calculating work of local dimming, relevant
It calculates after information is calculated using processor conversion and is sent to backlight driver module, corresponding shine is controlled by backlight driver module
The luminance of unit realizes liquid crystal-spliced mould group local dimming.
In the prior art, display driver needs to have the function of local dimming calculating, leads to higher cost.
Summary of the invention
The purpose of the application is intended at least can solve above-mentioned one of technological deficiency, existing for especially liquid crystal-spliced mould group
Lead to the technological deficiency of higher cost since display driver needs to have the function of local dimming calculating.
In a first aspect, the embodiment of the present application provides a kind of control system of liquid crystal-spliced display module, comprising: General controller
And multiple sub- control assemblies；Sub- control assembly corresponds to the backlight module in liquid crystal-spliced display module；Sub- control assembly packet
Include signal controller and backlight driver module；Signal controller is electrically connected with backlight driver module, backlight driver module be used for
Each luminescence unit electrical connection in backlight module；Signal controller is electrically connected with General controller, for receiving General controller output
Master control signal determines the target for adapting to target local dimming region according to the original local dimming subsignal in master control signal
Local dimming subsignal；Target local dimming subsignal is sent to backlight driver module, so that backlight driver module drives mesh
The luminescence unit marked in local dimming region executes local dimming.
Second aspect, the embodiment of the present application provide a kind of liquid crystal-spliced display module, the backlight mould including multiple splicings
The control system for the liquid crystal-spliced display module that group and the embodiment of the present application first aspect provide；Each son in control system
Control assembly and each backlight module correspond.
The third aspect, the embodiment of the present application provide a kind of control method of liquid crystal-spliced mould group, are implemented based on the application
The control system for the liquid crystal-spliced display module that example first aspect provides is realized, comprising: every sub- control assembly in control system
Receive master control signal；According to the original local dimming subsignal in master control signal, determine to adapt to target local dimming region
Target local dimming subsignal；Target local dimming subsignal is sent to backlight driver module, so that backlight driver module is driven
Luminescence unit in moving-target local dimming region executes local dimming.
Technical solution provided by the embodiments of the present application has the benefit that
In the control system of liquid crystal-spliced display module provided by the embodiments of the present application, since signal controller itself has
Standby logical operation function, therefore can use signal controller and determined according to the original local dimming subsignal in master control signal
The target local dimming subsignal in target local dimming region is adapted to out, and target local dimming subsignal is transmitted directly to carry on the back
CD-ROM drive dynamic model group.That is, signal controller can replace the partial function of display driver in the prior art, display is driven
Dynamic device may not need the function of having conversion local dimming signal, therefore display driver can be selected that function is simple, price is low
Honest and clean model, to be effectively reduced the cost of liquid crystal-spliced display module.
In addition, since each signal controller can identify respectively corresponding original signal (such as original office in master control signal
Portion dims subsignal or original display subsignal etc.), therefore control system does not need that split screen device is arranged to divide master control signal, this
It further reduced the cost of liquid crystal-spliced display module.
Detailed description of the invention
In order to more clearly explain the technical solutions in the embodiments of the present application, institute in being described below to the embodiment of the present application
Attached drawing to be used is needed to be briefly described.Wherein,
Fig. 1 is a kind of structural schematic diagram of the control system of liquid crystal-spliced display module provided by the embodiments of the present application；
Fig. 2 is a kind of backlight driver provided by the embodiments of the present application and backlight module connection status diagram；
Fig. 3 is a kind of structural schematic diagram of liquid crystal-spliced display module provided by the embodiments of the present application；
Fig. 4 is a kind of flow diagram of the control method of liquid crystal-spliced mould group provided by the embodiments of the present application；
Fig. 5 is a kind of flow diagram of the extension control method of liquid crystal-spliced mould group provided by the embodiments of the present application；
In figure:
1- General controller；2- control assembly；21- signal controller；
22- backlight driver module；221- backlight driver；222- backlight electric power；23- display driver；
3- backlight module；31- luminescence unit；311- illuminator；312- switching device；
100- display device.
Specific embodiment
Embodiments herein is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and is only used for explaining the application, and is not construed as limiting the claims.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singular " one " used herein, " one
It is a ", " described " and "the" may also comprise plural form.It is to be further understood that being arranged used in the description of the present application
Diction " comprising " refer to that there are the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or addition
Other one or more features, integer, step, operation, element, component and/or their group.It should be understood that when we claim member
Part is " connected " or when " coupled " to another element, it can be directly connected or coupled to other elements, or there may also be
Intermediary element.In addition, " connection " used herein or " coupling " may include being wirelessly connected or wirelessly coupling.It is used herein to arrange
Diction "and/or" includes one or more associated wholes for listing item or any cell and all combinations.
To keep the purposes, technical schemes and advantages of the application clearer, below in conjunction with attached drawing to the application embodiment party
Formula is described in further detail.Below with specifically embodiment to the technical solution of the application and the technical solution of the application
Above-mentioned technical problem how is solved to be described in detail.These specific embodiments can be combined with each other below, for identical
Or similar concept or process may repeat no more in certain embodiments.Below in conjunction with attached drawing, to embodiments herein
It is described.
In the embodiment of the present application, local dimming (Local Dimming) refers to, backlight module is divided into multiple subarea
Domain corresponds to the gray scale of image on display panel according to respective sub-areas in operation, to adjust the shading value of backlight, is reached with this
To energy conservation, the technology of enhancing image quality effect.
Liquid crystal-spliced display module generally includes General controller and multiple display devices, and Fig. 3 shows a kind of liquid of 2*2 form
Brilliant tiled display mould group, the i.e. display module include four display devices.
The inventors of the present application found that it is existing it is a kind of cascade splicing liquid crystal-spliced display module in, display device
Including signal controller, display driver (TCON, Timer Control Register), backlight driver module, display panel
And backlight module.During the work time, it when multiple display devices show an image jointly, needs to export General controller total
The image segmentation of characterization is shown in control signal into multiple images block, the display panel of each display device is shown wherein respectively
One image block.However, showing the resolution ratio for the image that signal is characterized and point of liquid crystal-spliced display module in master control signal
Resolution may it is inconsistent, just need to amplify each image block at this time so that the resolution ratio of each image block respectively with it is corresponding
The rate respectively of display device be adapted.As shown in figure 3, the image that display signal is characterized (dotted line frame indicates image in Fig. 3)
Resolution ratio be 1920*1080, then the resolution ratio of each image block be 960*540.Each display in liquid crystal-spliced display module
The rate respectively of device is also 1920*1080, if image block is without amplification, each image block is in the aobvious of corresponding display device
Show the region that a quarter is only accounted on panel.Therefore, it is necessary to show that signal is converted, so that the display signal institute after conversion
The resolution ratio of the image of characterization is adapted with the resolution ratio of corresponding display device.
Since shared region is changed image on a display panel, local dimming is executed on backlight module
Subregion quantity is also required to do corresponding adjustment, i.e., also needs to convert local dimming signal in master control signal, so that back
CD-ROM drive dynamic model group can drive the luminescence unit in display module in corresponding region to execute according to the local dimming signal after conversion
Local dimming.
However, in the prior art, the conversion work of local dimming signal needs display driver to execute, and will be after conversion
Local dimming signal is sent to backlight driver module, and the display driver for having local dimming function switching signal is expensive,
Lead to the higher cost of liquid crystal-spliced display module entirety.
Below to the invention relates to several nouns be introduced and explain:
Original display subsignal, the unconverted display subsignal for showing a corresponding display device in signal.
Target shows subsignal, the display subsignal of a corresponding display device in the display signal after conversion.
Original display region refers to, the region for the image for being used to show that original display subsignal is characterized in display panel.
Destination display area refers to, is used to the region for the image that displaying target shows that subsignal is characterized in display panel.
Original local dimming subsignal, the local dimming of a corresponding display device in unconverted local dimming signal
Subsignal.
Target local dimming subsignal, local dimming of a corresponding display device in the local dimming signal after conversion
Signal.
Original local dimming region is used to execute part in illuminating module under the control of original local dimming subsignal
Region where each luminescence unit of light modulation.
For these reasons, the embodiment of the present application provides a kind of control system of liquid crystal-spliced display module, such as Fig. 1 institute
Show, comprising: General controller 1 and multiple sub- control assemblies 2.Sub- control assembly 2 corresponds to the backlight in liquid crystal-spliced display module
Mould group 3.Sub- control assembly 2 includes signal controller 21 and backlight driver module 22, signal controller 21 and backlight driver module
22 electrical connections, backlight driver module 22 with each luminescence unit 31 in backlight module 3 for being electrically connected.
Signal controller 21 is electrically connected with General controller 1, for receiving the master control signal of the output of General controller 1, is believed according to master control
Original local dimming subsignal in number determines the target local dimming subsignal for adapting to target local dimming region；By mesh
Mark local dimming subsignal is sent to backlight driver module 22, so that backlight driver module 22 drives in target local dimming region
Luminescence unit 31 execute local dimming.
In the control system of liquid crystal-spliced display module provided by the embodiments of the present application, due to signal controller 21 itself
Have logical operation function, therefore can use signal controller 21 according to the original local dimming subsignal in master control signal
It determines the target local dimming subsignal in adaptation target local dimming region, and target local dimming subsignal is directly transmitted
To backlight driver module 22.That is, signal controller 21 can replace the part of display driver 23 in the prior art
Function, display driver 23 may not need the function of having conversion local dimming signal, therefore display driver 23 can be selected
Simple, the cheap model of function, to be effectively reduced the cost of liquid crystal-spliced display module.
In addition, since each signal controller 21 can identify that respectively corresponding original signal is (such as original in master control signal
Local dimming subsignal or original display subsignal etc.), therefore control system does not need that split screen device is arranged to divide master control signal,
This further reduces the costs of liquid crystal-spliced display module.
Optionally, in the control system of liquid crystal-spliced display module provided by the embodiments of the present application, backlight driver module
22 include backlight driver 221 and backlight electric power 222.Signal controller 21 is electrically connected with backlight driver 221, backlight driver
221 and backlight electric power 222 be used for and each luminescence unit 31 form circuit.
By taking Fig. 2 as an example, luminescence unit 31 includes illuminator 311 and switching device 312, illuminator 311 and switching device 312
Series connection.The local dimming signal input part of backlight driver 221 is electrically connected with signal controller 21, backlight driver 221 it is anti-
Feedback signal output end is electrically connected with the feedback signal input terminal of backlight electric power 222.The power output end of backlight electric power 222 and each
The input terminal of illuminator 311 in luminescence unit 31 is electrically connected, and the control signal output of backlight driver 221 shines with each
Switching device 312 in unit 31 is electrically connected.
Illuminator 311 can select light emitting diode, and in Fig. 2, illuminator 311 is 3 series connection light emitting diodes.Switch
Device 312 can select MOS (Metal Oxide Semiconductor) to manage, therefore the control signal of backlight driver 221 is defeated
Outlet is electrically connected with 312 grid of switching device.
When the control signal output of backlight driver 221 exports high-order voltage, switching device 312 is connected, so that shining
Body 311 shines；When the control signal output of backlight driver 221 exports low level voltage, switching device 312 is disconnected, illuminator
311 extinguish.As switching device 312 is connected and disconnects, PWM is formed in circuit, and (Pulse Width Modulation, pulse are wide
Degree modulation) signal, backlight driver 221 is according to the target local dimming subsignal received, the reality in such a way that pwm signal is adjusted
Existing local dimming.
Optionally, in the control system of liquid crystal-spliced display module provided by the embodiments of the present application, General controller 1 and multiple
Signal controller 21 in sub- control assembly 2 is sequentially connected in series.Signal controller 21 in each current sub- control assembly 2 is for connecing
After receiving the master control signal that signal controller 21 or General controller 1 export in a sub- control assembly 2, master control signal is exported under
Signal controller 21 in one sub- control assembly 2.
Specifically, as shown in Figure 1, the signal controller 21 being located in the first sub- control assembly 2 receives the output of General controller 1
Master control signal, then master control signal is exported into the signal controller 21 into next sub- control assembly 2；Positioned at other positions
Signal controller 21 in sub- control assembly 2 receives the master control signal that signal controller 21 exports in a sub- control assembly 2,
Master control signal is exported to the signal controller 21 into next sub- control assembly 2 again.It should be noted that signal controller 21
Between output and the primary source of received master control signal be General controller 1, the master control letter that each signal controller 21 receives
Number content it is consistent.
In the control system of liquid crystal-spliced display module provided by the embodiments of the present application, the master control that General controller 1 exports is believed
Number next signal controller 21 can be sent to by a upper signal controller 21, reduce declining for master control signal significantly
Subtract, ensure that the stability of master control signal transmission process.
Optionally, in the control system of liquid crystal-spliced display module provided by the embodiments of the present application, sub- control assembly 2 is also
Including display driver 23, display driver 23 with the display panel in liquid crystal-spliced display module for being electrically connected.
Signal controller 21 is electrically connected with display driver 23, for according to the original display subsignal in master control signal,
Determine that the target for adapting to destination display area shows subsignal；Target is shown that subsignal is sent to display driver 23, is made
Obtaining display driver 23 drives display panel to show image in destination display area.
Optionally, General controller 1 and signal controller 21 can include SOC (System on Chip, system level chip),
Microprocessor, Analog IP core, digital IP kernel and memory (or piece external storage control interface) are integrated in one chip by SOC, are had
There is stronger operational capability.
Based on the same inventive concept, the embodiment of the present application also provides a kind of liquid crystal-spliced display modules, including multiple spellings
The backlight module 3 connect and control system provided by the embodiments of the present application.Each sub- control assembly 2 and each back in control system
Optical mode group 3 corresponds.
The structural schematic diagram of liquid crystal-spliced display module can refer to Fig. 3.It should be noted that corresponding backlight module
3 and sub- control assembly 2 belong to the same display device 100, a liquid crystal-spliced display module may include to a display device
100.The liquid crystal-spliced display module of 2*2 form shown in FIG. 1 includes four display devices 100.
By taking Fig. 2 as an example, backlight module 3 is wrapped including multiple luminescence units 31.Luminescence unit 31 includes illuminator 311 and derailing switch
Part 312, illuminator 311 and switching device 312 are connected.The local dimming signal input part and signal of backlight driver 221 control
Device 21 is electrically connected, and the feedback signal output of backlight driver 221 is electrically connected with the feedback signal input terminal of backlight electric power 222.
The power output end of backlight electric power 222 is electrically connected with the input terminal of the illuminator 311 in each luminescence unit 31, backlight driver
221 control signal output is electrically connected with the switching device 312 in each luminescence unit 31.Switching device 312 can be selected
MOS (Metal Oxide Semiconductor) pipe, therefore the control signal output and switching device of backlight driver 221
The electrical connection of 312 grids.
Display device 100 further includes display panel, the display driver 23 in sub- control assembly 2 and belongs to a display
The display panel of device 100 is electrically connected.The specific connection type of display driver 23 and display panel can be with reference to this field
The prior art, details are not described herein again.
Based on the same inventive concept, it the embodiment of the present application also provides a kind of control method of liquid crystal-spliced mould group, is based on
The control system of liquid crystal-spliced display module provided by the embodiments of the present application realizes, the flow diagram of this method as shown in figure 4,
Include:
S101: every sub- control assembly 2 receives master control signal in control system.
General controller 1 in control system exports master control signal, and the signal controller 21 in every sub- control assembly 2 receives should
Master control signal.As shown in Figure 1, in the control system of liquid crystal-spliced display module provided by the embodiments of the present application, due to master control
Signal controller 21 in device 1 and multiple sub- control assemblies 2 is sequentially connected in series, therefore, optionally, every height control in control system
Component 2 receives master control signal, comprising: the signal controller 21 in each current sub- control assembly 2 is for receiving a son control
After the master control signal that signal controller 21 or General controller 1 export in component 2 processed, master control signal is exported to next height control group
Signal controller 21 in part 2.
As shown in Figure 1, it includes original display signal, original local dimming signal and original that General controller 1, which exports master control signal,
Display control signal etc..The content for the master control signal that signal controller 21 receives in every sub- control assembly 2 be it is identical, because
This each signal controller 21 also needs to identify its own corresponding part signal in master control signal, optionally, is in control
In system after the every sub- reception of control assembly 2 master control signal, further includes: determine original display according to preset partition information
Signal；And original part will be determined as with the original local dimming signal in the associated part of original display subsignal in master control signal
Dim subsignal.
S102: it according to the original local dimming subsignal in master control signal, determines to adapt to target local dimming region
Target local dimming subsignal.
In this step, signal controller 21 needs to confirm whether original local dimming subsignal is converted, if
It does not need to convert, then believes target local dimming that original local dimming subsignal is determined as adapting to target local dimming region
Number；If desired it converts, is then determined as the original local dimming subsignal after conversion adapting to the target in target local dimming region
Local dimming subsignal.
It should be noted that the Rule of judgment for determining whether original local dimming subsignal is converted can basis
Depending on actual needs.For example, can be shared on corresponding display panel according to the image block that original display subsignal is characterized
Region whether reach preset value, to judge whether original local dimming subsignal is converted.In general, the usual phase
The image block for hoping original display subsignal be characterized can take corresponding display panel.
When original local dimming subsignal is converted, optionally, adjusted according to the original part in master control signal
Photon signal determines the target local dimming subsignal for adapting to target local dimming region, comprising: according in master control signal
Original local dimming subsignal is converted to and adapts to target office by original display subsignal and preset display panel resolution information
The target local dimming subsignal in portion light modulation region.
S103: being sent to backlight driver module 22 for target local dimming subsignal, so that backlight driver module 22 drives
Luminescence unit 31 in the target local dimming region of backlight module 3 executes local dimming.
Optionally, the control method of liquid crystal-spliced mould group provided by the embodiments of the present application further include: according in master control signal
Original display subsignal, determine adapt to destination display area target show subsignal；Target is shown that subsignal is sent
To display driver 23, so that display driver 23 drives display panel to show image in destination display area.
Based on the same inventive concept, the embodiment of the present application also provides a kind of extension control method of liquid crystal-spliced mould group,
Control system realization based on liquid crystal-spliced display module provided by the embodiments of the present application, the flow diagram of this method such as Fig. 5
It is shown, comprising:
S201: the signal controller 21 in each current sub- control assembly 2 receives signal control in a sub- control assembly 2
After the master control signal of device 21 or General controller 1 output processed, master control signal is exported into the signal into next sub- control assembly 2 and is controlled
Device 21.
As shown in Figure 1, in the control system of liquid crystal-spliced display module provided by the embodiments of the present application, 1 He of General controller
Signal controller 21 in multiple sub- control assemblies 2 is sequentially connected in series.Therefore, the signal control in the first sub- control assembly 2
Device 21 processed receives the master control signal that General controller 1 exports, then master control signal is exported the signal control into next sub- control assembly 2
Device 21 processed；Signal controller 21 in the sub- control assembly 2 of other positions receives signal control in upper one sub- control assembly 2
The master control signal that device 21 processed exports, then master control signal is exported into the signal controller 21 into next sub- control assembly 2.
It should be noted that being exported between signal controller 21 with the primary source of received master control signal is General controller
1, the content for the master control signal that each signal controller 21 receives is consistent.
S202: original display subsignal is determined according to preset partition information；It will be sub with original display in master control signal
The original local dimming signal in the associated part of signal is determined as original local dimming subsignal.
It should be noted that partition information can be stored in signal controller 21 in the system of programming signal controller 21
In.Partition information includes at least the corresponding relationship between number of partitions, subregion and display device 100.
The quantity for the image block that the image expectation that original display signal is characterized in master control signal is divided into, with number of partitions
Unanimously.For example, number of partitions is 4, then it represents that the image that original display signal is characterized is by be divided into 4 image blocks.Point
It can be one-to-one relationship, such as liquid crystal-spliced display module four displays of 2*2 form between area and display device 100
Device 100, then number of partitions can be 4, and each display device 100 is for showing corresponding image block.
It will be understood to those skilled in the art that the image block that each subregion is characterized with each original display subsignal is corresponding
, signal controller 21 can be believed when knowing corresponding subregion according to the rate respectively for the image that original display signal is characterized
Breath determines original display subsignal.
For example, some signal controller 21 is corresponding with the first subregion, and the first subregion is corresponding with the first image block.It is original aobvious
The resolution ratio for showing the image that signal is characterized is 1920*1080, then the first image block is the 1st column to the 960th column pixel in image
Point and the 1st row to the overlapping region of the 540th row pixel, original display signal data letter corresponding with above-mentioned first image module
Breath is original display subsignal required for signal controller 21.Based on the above principles, other signal controllers 21 can also be true
Original display subsignal required for making.
In master control signal, original display signal with original local dimming signal be it is associated, when signal controller 21 is true
It, can be by master control signal and the original office in the associated part of original display subsignal after original display subsignal required for making
Portion's dim signal is determined as original local dimming subsignal.
It should be noted that may be performed simultaneously S203 and S205 after executing completion S202, and certainly, S204 and S205
Start execute initial time there may also be the time differences, it is only necessary to guarantee to show on display panel the movement of image with it is corresponding
Local dimming movement can synchronize progress.
S203:, will be original according to the original display subsignal and preset display panel resolution information in master control signal
Local dimming subsignal is converted to the target local dimming subsignal for adapting to target local dimming region.
It optionally, will be former according to the original display subsignal and preset display panel resolution information in master control signal
Beginning local dimming subsignal is converted to the target local dimming subsignal for adapting to target local dimming region, comprising: according to original
It shows subsignal and preset display panel resolution information, determines that original local dimming region is amplified to target local dimming
First amplification factor needed for region；According to the first amplification factor, original local dimming subsignal is converted to and adapts to target office
The target local dimming subsignal in portion light modulation region.
Optionally, according to original display subsignal and preset display panel resolution information, determine that original part is adjusted
First amplification factor needed for light region is amplified to target local dimming region, comprising: believe preset display panel resolution ratio
The maximum pixel display area of characterized display panel is ceased as destination display area, determines that original display region is amplified to
Second amplification factor needed for target original display region；Using the second amplification factor as the first amplification factor.
Wherein it is determined that the specific steps of the second amplification factor can be with are as follows:
(a) the pixel line number in the maximum pixel display area of display panel and the pixel in original display region are calculated
Point line number between the first ratio and display panel maximum pixel display area in pixel pixel columns with it is original
The second ratio between the columns of display area.
Picture by taking resolution ratio is the display panel of 1920*1080 as an example, in the maximum pixel display area of the display panel
Vegetarian refreshments line number is 1080, and pixel columns is 960.
The line number and columns in original display region, can be according to the rate respectively for the image block that original display subsignal is characterized
It determines.For example, the rate respectively for the image that original display signal is characterized is 1920*1080, and original display subsignal institute table
The image block of sign accounts for a quarter for the image that original display signal is characterized, then the image block that original display subsignal is characterized
Rate respectively be 960*540.The pixel line number in original display region is 540, and pixel columns is 960.First ratio and
Two ratios are 2.
(b) according to the first ratio and second ratio, determine that original display region is amplified to target original display area
Second amplification factor needed for domain.
In the embodiment of the present application, when original display region being amplified to target original display region, original display region
Length and width direction be required to twice of amplification, the second amplification factor be 4.
Should also be noted that if the first ratio, the second ratio or the second amplification factor are non-integer, the first ratio,
The value of second ratio or the second amplification factor can do Fuzzy Processing.
It will be understood to those skilled in the art that can determine that the second amplification factor when having executed S203, therefore
The step of calculating the second amplification factor may not necessarily be repeated by executing S204, in S204 directly by S203 calculated second
Amplification factor is as the first amplification factor.
After executing completion S203, start to execute S204.
S204: being sent to backlight driver module 22 for target local dimming subsignal, so that backlight driver module 22 drives
Luminescence unit 31 in the target local dimming region of backlight module 3 executes local dimming.
The target local dimming region of backlight module 3 is corresponding in destination display area with display panel, implements in the application
In example, destination display area can be the maximum pixel display area of display panel, then the target local dimming area of backlight module 3
Domain is the region for including all luminescence units 31 in backlight module 3.
When the control signal output of backlight driver 221 exports high-order voltage, switching device 312 is connected, so that shining
Body 311 shines；When the control signal output of backlight driver 221 exports low level voltage, switching device 312 is disconnected, illuminator
311 extinguish.As switching device 312 is connected and disconnects, PWM is formed in circuit, and (Pulse Width Modulation, pulse are wide
Degree modulation) signal, backlight driver 221 is according to the target local dimming subsignal received, the reality in such a way that pwm signal is adjusted
Existing local dimming.Backlight driver module 22 drives 31 executive board of luminescence unit in the target local dimming region of backlight module 3
Portion dims other specific steps, can refer to the state of the art, details are not described herein again.
S205: according to the original display subsignal in master control signal, determine that the target for adapting to destination display area is shown
Subsignal.
In this step, signal controller 21 needs to confirm whether original display subsignal is converted, if being not required to
It converts, is then determined as original display subsignal adapting to the target local dimming subsignal in target local dimming region；If needing
It converts, then the target that the original display subsignal after conversion is determined as adapting to destination display area is shown into subsignal.
It should be noted that the Rule of judgment for determining whether original display subsignal is converted can be according to reality
Depending on needing.For example, area that can be shared on corresponding display panel according to the image block that original display subsignal is characterized
Whether domain reaches preset value, to judge whether original local dimming subsignal is converted.In general, it is usually desirable to former
The image block for beginning to show that subsignal is characterized can take corresponding display panel.
When original display subsignal is converted, display that preset display panel resolution information is characterized
Determine that original display region is amplified to the target viewing area as destination display area in the maximum pixel display area of panel
Second amplification factor needed for domain；According to second amplification factor, original display subsignal is converted into adaptation target and is shown
The target in region shows subsignal.
Determine that the specific steps of the second amplification factor determine that the specific steps of the second amplification factor are consistent with S203 in S205,
Details are not described herein again.
After executing completion S205, start to execute S206.
S206: target is shown that subsignal is sent to display driver 23, so that display driver 23 drives display panel
Image is shown in destination display area.
Display panel can be decided according to the actual requirements in the specific range of destination display area, in the embodiment of the present application
In, destination display area can be the maximum pixel display area of display panel.Display driver 23 drives display panel in mesh
The principle and process of image are shown in mark display area, can refer to the state of the art, details are not described herein again.
Using the embodiment of the present application, following technical effect at least may be implemented:
1, in the control system of liquid crystal-spliced display module provided by the embodiments of the present application, due to signal controller itself
Has logical operation function, therefore it is true according to the original local dimming subsignal in master control signal to can use signal controller
The target local dimming subsignal for adapting to target local dimming region is made, and target local dimming subsignal is transmitted directly to
Backlight driver module.That is, signal controller can replace the partial function of display driver in the prior art, display
Driver may not need the function of having conversion local dimming signal, therefore display driver can be selected that function is simple, price
Cheap model, to be effectively reduced the cost of liquid crystal-spliced display module.
In addition, since each signal controller can identify respectively corresponding original signal (such as original office in master control signal
Portion dims subsignal or original display subsignal etc.), therefore control system does not need that split screen device is arranged to divide master control signal, this
It further reduced the cost of liquid crystal-spliced display module.
2, in the control system of liquid crystal-spliced display module provided by the embodiments of the present application, the master control letter of General controller output
Number next signal controller can be sent to by a upper signal controller, reduce the decaying of master control signal significantly, protected
The stability of master control signal transmission process is demonstrate,proved.
Those skilled in the art of the present technique have been appreciated that in the application the various operations crossed by discussion, method, in process
Steps, measures, and schemes can be replaced, changed, combined or be deleted.Further, each with what is crossed by discussion in the application
Kind of operation, method, other steps, measures, and schemes in process may also be alternated, changed, rearranged, decomposed, combined or deleted.
Further, in the prior art to have and the step in various operations disclosed herein, method, process, measure, scheme
It may also be alternated, changed, rearranged, decomposed, combined or deleted.
In the description of the present application, it is to be understood that term " center ", "upper", "lower", "front", "rear", " left side ",
The orientation or positional relationship of the instructions such as " right side ", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on the figure
Orientation or positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device of indication or suggestion meaning or
Element must have a particular orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
Term " first ", " second " be used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or
Implicitly indicate the quantity of indicated technical characteristic." first " is defined as a result, the feature of " second " can be expressed or imply
Ground includes one or more of the features.In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or
Two or more.
In the description of the present application, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be to be connected directly, the connection inside two elements can also be can be indirectly connected through an intermediary.For this field
For those of ordinary skill, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
In the description of this specification, particular features, structures, materials, or characteristics can be real in any one or more
Applying can be combined in any suitable manner in example or example.
It should be understood that although each step in the flow chart of attached drawing is successively shown according to the instruction of arrow,
These steps are not that the inevitable sequence according to arrow instruction successively executes.Unless expressly stating otherwise herein, these steps
Execution there is no stringent sequences to limit, can execute in the other order.Moreover, at least one in the flow chart of attached drawing
Part steps may include that perhaps these sub-steps of multiple stages or stage are not necessarily in synchronization to multiple sub-steps
Completion is executed, but can be executed at different times, execution sequence, which is also not necessarily, successively to be carried out, but can be with other
At least part of the sub-step or stage of step or other steps executes in turn or alternately.
The above is only some embodiments of the application, it is noted that for the ordinary skill people of the art
For member, under the premise of not departing from the application principle, several improvements and modifications can also be made, these improvements and modifications are also answered
It is considered as the protection scope of the application.
Claims (12)
1. a kind of control system of liquid crystal-spliced display module characterized by comprising General controller and multiple sub- control groups
Part；The sub- control assembly corresponds to the backlight module in liquid crystal-spliced display module；
The sub- control assembly includes signal controller and backlight driver module；The signal controller and the backlight drive mould
Group electrical connection, the backlight driver module with each luminescence unit in the backlight module for being electrically connected；
The signal controller is electrically connected with the General controller, for receiving the master control signal of the General controller output, according to institute
The original local dimming subsignal in master control signal is stated, determines the target local dimming letter for adapting to target local dimming region
Number；The target local dimming subsignal is sent to backlight driver module, so that the backlight driver module drives the back
The luminescence unit in the target local dimming region of optical mode group executes local dimming.
2. according to control system described in right 1, which is characterized in that the backlight driver module includes backlight driver and backlight
Power supply；
The signal controller is electrically connected with the backlight driver, and the backlight driver and backlight electric power are used for and each institute
State luminescence unit composition circuit.
3. according to control system described in right 1, which is characterized in that the institute in the General controller and multiple sub- control assemblies
Signal controller is stated to be sequentially connected in series；
The signal controller in each presently described sub- control assembly is for receiving institute in the sub- control assembly
After stating signal controller or the master control signal of General controller output, the master control signal is exported to next son
The signal controller in control assembly.
4. according to control system described in right 1, which is characterized in that the sub- control assembly further includes display driver；Display
Driver with the display panel in the liquid crystal display in the liquid crystal-spliced display module for being electrically connected；
The signal controller is electrically connected with the display driver, for according to original display in the master control signal
Signal determines that the target for adapting to destination display area shows subsignal；The target is shown that subsignal is sent to display and drives
Dynamic device, so that the display driver drives display panel shows image in the destination display area.
5. a kind of liquid crystal-spliced display module, which is characterized in that backlight module and such as claim 1- including multiple splicings
Control system described in any one of 4；Each sub- control assembly and each backlight module in the control system correspond.
6. a kind of control method of liquid crystal-spliced mould group is realized based on such as control system of any of claims 1-4,
It is characterised by comprising:
Every sub- control assembly receives master control signal in the control system；
According to the original local dimming subsignal in the master control signal, the target office for adapting to target local dimming region is determined
Portion dims subsignal；
The target local dimming subsignal is sent to backlight driver module, so that the backlight driver module drives backlight mould
Luminescence unit in the target local dimming region of group executes local dimming.
7. control method according to claim 6, which is characterized in that adjust the original part according in the master control signal
Photon signal determines the target local dimming subsignal for adapting to target local dimming region, comprising:
The original display subsignal and preset display panel resolution information according in the master control signal, by the original
Beginning local dimming subsignal is converted to the target local dimming subsignal for adapting to target local dimming region.
8. control method according to claim 7, which is characterized in that original display according in the master control signal
The original local dimming subsignal is converted to and adapts to target local dimming by signal and preset display panel resolution information
The target local dimming subsignal in region, comprising:
According to the original display subsignal and preset display panel resolution information, determine that original local dimming region is put
First amplification factor needed for big extremely target local dimming region；
According to first amplification factor, the original local dimming subsignal is converted to and adapts to target local dimming region
Target local dimming subsignal.
9. control method according to claim 8, which is characterized in that described according to the original display subsignal and preset
Display panel resolution information determines that original local dimming region is amplified to first needed for target local dimming region
Amplification factor, comprising:
The maximum pixel display area for the display panel that preset display panel resolution information is characterized is as target
The second amplification factor needed for original display region is amplified to target original display region is determined in display area；
Using second amplification factor as first amplification factor.
10. control method according to claim 6, which is characterized in that further include:
According to the original display subsignal in the master control signal, target display for adapting to destination display area is determined
Signal；
The target is shown that subsignal is sent to display driver, so that the display driver drives display panel is described
Image is shown in destination display area.
11. control method according to claim 6, which is characterized in that every sub- control assembly in the controls connects
After receipts master control signal, further includes:
The original display subsignal is determined according to preset partition information；And
It will be determined as in the master control signal with the original local dimming signal in the associated part of original display subsignal described
Original local dimming subsignal.
12. control method according to claim 6, which is characterized in that every sub- control assembly receives in the control system
Master control signal, comprising:
The signal controller in each presently described sub- control assembly receives to be believed described in a upper sub- control assembly
After number controller or the master control signal of General controller output, the master control signal is exported to next sub- control
The signal controller in component.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910160956.0A CN109686325B (en) | 2019-03-04 | 2019-03-04 | Liquid crystal splicing display module and control system and method thereof |
| PCT/CN2020/075032 WO2020177515A1 (en) | 2019-03-04 | 2020-02-13 | Liquid crystal tiled display module, control system and method for liquid crystal tiled display module |
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| CN201910160956.0A CN109686325B (en) | 2019-03-04 | 2019-03-04 | Liquid crystal splicing display module and control system and method thereof |
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| CN109686325B CN109686325B (en) | 2021-04-06 |
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| WO2020192351A1 (en) * | 2019-03-27 | 2020-10-01 | 京东方科技集团股份有限公司 | Backlight driving method and circuit, driving method and device for display, and display device |
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| CN113053261A (en) * | 2021-03-22 | 2021-06-29 | 福州京东方光电科技有限公司 | Splicing display device and splicing display method |
| CN114927110A (en) * | 2022-06-27 | 2022-08-19 | 青岛信芯微电子科技股份有限公司 | Backlight control method, display device, chip system and medium |
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| WO2020177515A1 (en) | 2020-09-10 |
| CN109686325B (en) | 2021-04-06 |
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