CN105139814B - Liquid crystal display and its display methods - Google Patents
Liquid crystal display and its display methods Download PDFInfo
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- CN105139814B CN105139814B CN201510306080.8A CN201510306080A CN105139814B CN 105139814 B CN105139814 B CN 105139814B CN 201510306080 A CN201510306080 A CN 201510306080A CN 105139814 B CN105139814 B CN 105139814B
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Abstract
The present invention discloses a kind of liquid crystal display and its display methods, and the display methods of the liquid crystal display includes：Obtain brightness value of each viewing area under current scene and later scene；Calculate the size between luminance difference of each viewing area under current scene and later scene, and relatively more described luminance difference and setting threshold values；When the luminance difference of a certain viewing area is more than the setting threshold values, the a certain viewing area is controlled to be shown under current scene with median luminance value, brightness value of a certain viewing area under later scene described in median luminance value ＜ described in brightness value L T.LT.LT of a certain viewing area under current scene.When difference in brightness of a certain viewing area under current scene and later scene is larger, when current scene is shown, the a certain viewing area is shown with median luminance value, and then, so that, brightness change of a certain viewing area under current scene and later scene reduces, and improves visual experience effect.
Description
Technical field
The present invention relates to display technology field, and in particular to a kind of liquid crystal display and its display methods.
Background technology
LCD TV backlight region regulation technology is Local-dimming technologies, refers to that liquid crystal television system believes image
Number it is divided into some viewing areas, and analysis calculating is carried out according to each viewing area brightness of image, so as to automatically controls each display
Region backlight it is bright dark.
The preferable lcoal-dimming technologies of local dimming technology LED liquid crystal television, the brightness of each viewing area is single
Solely control, i.e., according to the corresponding brightness of image of picture of each viewing area, the control LED of respectively different degree it is bright
Degree, for overall backlight control mode, improves the contrast of picture while power is saved.But drawing individually
Under the larger extreme case of face contrast, such as：There is mobile bright field scape below black background, due to shifting of the backlight with bright field scape
It is dynamic to be just lit one by one, there is an obvious bright dark change procedure with regard to backlight can be found out above vision, cause visual experience to be imitated
Fruit is deteriorated.
Fig. 1 to Fig. 3 is local dimming schematic diagram, and LCDs (LED backlight) is divided into multiple viewing areas (such as
In Fig. 11,2 ..., N), the corresponding LED backlight in each viewing area is respectively by different back light drive circuit controls
System, every kind of GTG of image all corresponds to one brightness value of certain back light driving current and correspondence, it is assumed that do not consider each LED
The difference of lamp, then the back light of each viewing area corresponding brightness value under identical electric current is the same, such as figure
Picture signal is divided according to 2 system, 8 data, then picture signal can be divided into 255 GTGs, when gray value is 0：Corresponding electric current is
Minimum, corresponding is black scene；When gray value is 255：Corresponding electric current is maximum, corresponding for most bright bright field scape.If
In an image scene, picture signal is the bright spot for having a motion in the case of black background, there is a bright spot as shown in Figure 2, when
The position of preceding bright spot is viewing area 1, with further reference to Fig. 3, and the direction of motion of bright spot is the viewing area 2 to the right, currently
, it is necessary to which corresponding LED backlight in viewing area 1 is lighted when scene is shown, when later scene is shown, then need closing aobvious
Show that the corresponding back light drive circuit in LED backlight in region 1, i.e. viewing area 1 provides minimum driving current, and simultaneously
Need to provide viewing area 2 certain current value, certain display brightness can be reached, due to the persistence of vision of human eye, energy
The obvious LED for feeling viewing area 2 is from the process secretly brightened, and the smooth of the picture that lacks exercise is felt, causes and regards
Feel that effect is poor.
The content of the invention
It is a primary object of the present invention to provide the display methods of a kind of display and liquid crystal display, it is intended to solve current
LCD TV the problem of visual experience effect in the case that picture contrast is larger is poor.
To reach above-mentioned technical purpose, the present invention provides a kind of display methods of liquid crystal display, the liquid crystal display
The display methods of device comprises the following steps：
Obtain brightness value of each viewing area under current scene and later scene；
Calculate luminance difference of each viewing area under current scene and later scene, and relatively more described luminance difference and
Set the size between threshold values；
When the luminance difference of a certain viewing area is more than the setting threshold values, a certain viewing area is controlled to exist
Shown under current scene with median luminance value, it is middle described in brightness value L T.LT.LT of a certain viewing area under current scene
Brightness value of a certain viewing area under later scene described in brightness value L T.LT.LT.
Preferably, brightness value of a certain viewing area under current scene is the first brightness value, a certain display
Brightness value of the region under later scene be the second brightness value, each viewing area when being shown using first brightness value as
Dim dark state, when being shown using second brightness value as illuminating state, the viewing area adjacent with a certain viewing area
It has been shown that, shown under later scene with first brightness value with second brightness value under current scene.
Preferably, luminance difference of each viewing area under current scene and later scene is calculated, and it is relatively described brighter
Also include after the step of spending the size between difference and setting threshold values：
When the luminance difference of a certain viewing area is less than the setting threshold values, a certain viewing area is controlled to exist
Shown under current scene with brightness value of a certain viewing area under current scene.
Preferably, the step of obtaining brightness value of each viewing area under current scene and later scene includes：
Digital signal processor sends brightness data of each viewing area in current scene to controller；
The controller receives each viewing area after the brightness data of current scene, is produced to the data signal
Brightness data of each viewing area that device feedback reception is arrived in current scene；
The digital signal processor by each viewing area of the feedback received current scene brightness data with
The brightness data of issued current scene is compared；
When comparison result is consistent, the digital signal processor sends the brightness data of later scene, institute to controller
Brightness data of the controller using each viewing area finally received in current scene is stated as each described viewing area to exist
Brightness value under current scene；
The controller receives each viewing area after the brightness data of later scene, is produced to the data signal
Brightness data of each viewing area that device feedback reception is arrived in later scene；
The digital signal processor by each viewing area of the feedback received later scene brightness data with
The brightness data of issued later scene is compared；
When comparison result is consistent, the controller by each viewing area finally received later scene brightness
Brightness value of the data as each described viewing area under later scene.
Preferably, the digital signal processor by each viewing area of the feedback received current scene brightness
After the step of brightness data of data and issued current scene is compared, in addition to：
When comparison result is inconsistent, the digital signal processor continues to send each viewing area to the controller
In the brightness data of current scene；
The digital signal processor by each viewing area of the feedback received later scene brightness data with
After the step of brightness data of issued later scene is compared, in addition to：
When comparison result is inconsistent, the digital signal processor continues to send each viewing area to the controller
In the brightness data of later scene.
To reach above-mentioned technical purpose, the present invention provides a kind of liquid crystal display again, it is characterised in that it includes electrically
Digital signal processor, controller, driver and the display screen of connection, the controller include brightness value acquisition module, brightness
Difference calculating module, drive control module：
The digital signal processor is to send brightness number of each viewing area under current scene and later scene
According to；
The brightness value acquisition module is used to brightness data of each viewing area under current scene and later scene, obtains
Take brightness value of each viewing area under current scene and later scene；
The luminance difference computing module is to calculate brightness of each viewing area under current scene and later scene
Size between difference, and relatively more described luminance difference and setting threshold values；
The drive control module is when the luminance difference of a certain viewing area is more than the setting threshold values, to control
The LED that the driver drives the display screen is made, makes a certain viewing area under current scene with median luminance value
It has been shown that, a certain viewing area described in median luminance value ＜ described in brightness value L T.LT.LT of a certain viewing area under current scene
Brightness value of the domain under later scene.
Preferably, brightness value of a certain viewing area under current scene is the first brightness value, a certain display
Brightness value of the region under later scene be the second brightness value, each viewing area when being shown using first brightness value as
Dim dark state, when being shown using second brightness value as illuminating state, the viewing area adjacent with a certain viewing area
It has been shown that, shown under later scene with first brightness value with second brightness value under current scene.
Preferably, the drive control module is also less than the setting to the luminance difference when a certain viewing area
During threshold values, control the driver to drive the LED of the display screen, make a certain viewing area under current scene with institute
Brightness value of a certain viewing area under current scene is stated to be shown.
Preferably, the digital signal processor includes brightness data sending module, brightness data recycling module, brightness number
Control module is sent according to comparing module and data, the brightness value acquisition module includes brightness data receiving unit, brightness number
According to feedback unit and brightness data pickup unit：
The brightness data sending module is to occur brightness data of each viewing area under current scene；
The brightness data receiving unit is to receive brightness data of each viewing area under current scene；
The brightness data feedback unit is used to each viewing area arrived to the brightness data recycling module feedback reception
Brightness data of the domain under current scene；
The brightness data recycling module is used to brightness data of each viewing area of reversed feedback under scene；
The brightness data comparing module is to bright under current scene by each viewing area of the feedback received
Brightness data of the degrees of data with each issued viewing area under current scene is compared；
The data send control module when comparison result is consistent, to control the brightness data sending module to send
Brightness data of each viewing area under later scene；
The brightness data pickup unit is to the brightness by each viewing area finally received under later scene
Brightness value of the data as each viewing area under later scene；
The brightness data receiving unit is also to receive brightness data of each viewing area under later scene；
The brightness data feedback unit is also used to each display arrived to the brightness data recycling module feedback reception
Brightness data of the region under later scene；
The brightness data recycling module is also used to brightness data of each viewing area of reversed feedback under later scene；
The brightness data comparing module also to by each viewing area of the feedback received under later scene
Brightness data of the brightness data with each issued viewing area under later scene is compared；
The data send control module also when comparison result is consistent, to control the brightness data sending module hair
Give brightness data of each viewing area under subsequent scenario；
The brightness data pickup unit is also to bright under later scene by each viewing area finally received
Brightness value of the degrees of data as each viewing area under later scene.
Preferably, the data send control module also when comparison result is inconsistent, to control the brightness data
Sending module continues to send brightness data of each viewing area in corresponding scene.
Preferably, each brightness viewing area is the viewing area corresponding to multiple LEDs, and the driver includes using
With the multiple driving chips for the LED for driving setting quantity respectively, the brightness data input of one of them driving chip is drawn
Pin is connected with the brightness data output pin of the data-signal plate, the brightness data input pin of remaining driving chip
The brightness data output pin with adjacent driving chip is electrically connected with successively, and the brightness data positioned at last driving chip is defeated
Go out pin to be connected with the brightness data input pin of the digital signal processor, the controller respectively with the multiple driving
Chip is electrically connected with, bright under current scene and later scene to obtain each viewing area from the multiple driving chip
Degrees of data.
The display methods and liquid crystal display for the liquid crystal display that the present invention is provided, the display methods of the liquid crystal display
Comprise the following steps：Obtain brightness value of each viewing area under current scene and later scene；Calculate each viewing area
Size between luminance difference under current scene and later scene, and relatively more described luminance difference and setting threshold values；When certain
When the luminance difference of one viewing area is more than the setting threshold values, control a certain viewing area under current scene with
Median luminance value is shown, described in median luminance value ＜ described in brightness value L T.LT.LT of a certain viewing area under current scene
Brightness value of a certain viewing area under later scene.When a certain viewing area is bright under current scene and later scene
Spend difference it is larger when, a certain viewing area can be shown with the median luminance value when current scene is shown
Show, and then cause, brightness change of a certain viewing area under current scene and later scene reduces, and improves vision body
Effect is tested, so as to avoid a certain viewing area brightness when current scene and later scene are shown from changing too greatly, and is caused
Visual experience effect is too poor.
Brief description of the drawings
The schematic diagram of the display screen for the liquid crystal display that Fig. 1 provides for background technology；
Fig. 2 is schematic diagram of the display screen of the liquid crystal display shown in Fig. 1 under current scene；
Fig. 3 is schematic diagram of the display screen of the liquid crystal display shown in Fig. 1 under later scene；
The schematic flow sheet of one embodiment of the display methods for the liquid crystal display that Fig. 4 provides for the present invention；
Fig. 5 is the part schematic flow sheet of the step S10 shown in Fig. 4；
Fig. 6 is another part schematic flow sheet of the step S10 shown in Fig. 4；
The block schematic illustration of the part-structure of one embodiment of the liquid crystal display that Fig. 7 provides for the present invention；
Fig. 8 is the block schematic illustration of the digital signal generator of the liquid crystal display shown in Fig. 7；
Fig. 9 is the block schematic illustration of the controller of the liquid crystal display shown in Fig. 7；
Figure 10 is the block schematic illustration of the brightness value acquiring unit of the controller shown in Fig. 9；
Figure 11 is the principle schematic of the part-structure of the liquid crystal display shown in Fig. 7；
Figure 12 is the schematic diagram of the display screen of the liquid crystal display shown in Figure 11；
Figure 13 is the schematic diagram under current scene of the display screen of the liquid crystal display shown in Figure 11；
Figure 14 is the schematic diagram under later scene of the display screen of the liquid crystal display shown in Figure 11.
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
Technical scheme is further illustrated below in conjunction with Figure of description and specific embodiment.It should be appreciated that this
The specific embodiment of place description is not intended to limit the present invention only to explain the present invention.
The present invention provides a kind of display methods of liquid crystal display, refers to Fig. 4 to Fig. 6, the liquid crystal provided in the present invention
In one embodiment of the display methods of display, the display methods of the liquid crystal display comprises the following steps：
Step S10, obtain brightness value of each viewing area under current scene and later scene；
In step S10, the viewing area can be the corresponding viewing area of single led lamp, or multiple LED
In the corresponding viewing area of lamp, such as Figure 11 concrete application example, it will not take preferably every in power consumption, practical application to reduce
Individual pixel is individually controlled, and the display screen of the liquid crystal display typically is divided into several viewing areas, each viewing area
The domain multiple LEDs of correspondence are the multiple pixels of correspondence, specifically, in this application embodiment, the display of the liquid crystal display
The resolution ratio of screen is 1920*1080, and the display screen of the liquid crystal display is divided into 96 viewing areas.Current scene is will
Display picture is wanted, later scene is next display picture after current scene has been shown, therefore, later scene can be seen
The current scene for next but one scene, that is, in step S10, current scene and later scene are adjacent two and shown
Show picture, current scene is previous display picture, and later scene is latter display picture.
Step S12, calculate luminance difference of each viewing area under current scene and later scene, and it is relatively described brighter
The size spent between difference and setting threshold values；
Step S14, when the luminance difference of a certain viewing area is more than the setting threshold values, control described a certain aobvious
Show that region is shown under current scene with median luminance value, brightness value L T.LT.LT of a certain viewing area under current scene
Brightness value of a certain viewing area under later scene described in the median luminance value ＜.
In step S12 into step S14, the setting threshold values can be an empirical value, when the luminance difference is more than
During the setting threshold values, user is observing current scene and during later scene, hence it is evident that feel a certain viewing area it is bright
Obvious change occurs for degree.Therefore, in the present invention, when a certain viewing area is bright under current scene and later scene
Spend difference it is larger, i.e., beyond it is described setting threshold values when, can when current scene is shown by a certain viewing area with
The median luminance value is shown, and then is caused, brightness of a certain viewing area under current scene and later scene
Change reduces, and improves visual experience effect, so as to avoid a certain viewing area from being shown in current scene and later scene
Shi Liangdu changes too greatly, and causes visual experience effect too poor.
In the present embodiment, also include after step S12：
Step S16, when the luminance difference of a certain viewing area is less than the setting threshold values, control described a certain aobvious
Show region under current scene and shown with brightness value of a certain viewing area under current scene.In step S16,
When the luminance difference is less than the setting threshold values, user is imperceptible described when observing current scene and later scene
Obvious change occurs for the brightness of a certain viewing area.
In the present embodiment, brightness value of a certain viewing area under current scene is that the first brightness value is (such as grey
Angle value is that 0), brightness value of a certain viewing area under later scene is the second brightness value (such as gray value is 255), institute
Each viewing area is stated when being shown using first brightness value as dim dark state, when being shown using second brightness value to light
State, the viewing area adjacent with a certain viewing area shown under current scene with second brightness value,
Shown under later scene with first brightness value, namely in the present embodiment, in the display screen of the liquid crystal display
On show as the action continuously lighted.
In the present embodiment, step S10 includes：
Step S101, digital signal processor send brightness data of each viewing area in current scene to controller；
Step S102, the controller receive each viewing area after the brightness data of current scene, to the number
Brightness data of each viewing area that word signal generator feedback reception is arrived in current scene；
Step S103, the digital signal processor are by each viewing area of the feedback received in the bright of current scene
The brightness data of degrees of data and issued current scene is compared；
Step S104, when comparison result is consistent, the digital signal processor to controller send later scene it is bright
Degrees of data, brightness data of the controller using each viewing area finally received in current scene shows as described each
Show brightness value of the region under current scene；
Step S105, the controller receive each viewing area after the brightness data of later scene, to the number
Brightness data of each viewing area that word signal generator feedback reception is arrived in later scene；
Step S106, the digital signal processor are by each viewing area of the feedback received in the bright of later scene
Degrees of data and the brightness data of issued later scene are compared；
Step S107, when comparison result is consistent, the controller is by each viewing area finally received next
Brightness value of the brightness data of scene as each described viewing area under later scene.
In step S101 into step S107, to obtaining brightness of each viewing area under current scene and later scene
Value carries out a correction, prevents, the controller receives brightness of each viewing area under current scene and later scene
Brightness value under current scene and later scene that value is sent out with the digital signal processor is inconsistent.
In the present embodiment, after step S103, in addition to：
S108, when comparison result is inconsistent, the digital signal processor continue to the controller send each show
Show brightness data of the region in current scene；
After step S106, in addition to：
S109, when comparison result is inconsistent, the digital signal processor continue to the controller send each show
Show brightness data of the region in later scene.
The present invention provides a kind of liquid crystal display again, refers to Fig. 7 to Figure 10, the liquid crystal display provided in the present invention
In one embodiment, the digital signal processor 1, controller 2, driver 3 that the liquid crystal display includes being electrically connected with (can be
The driving chip of the LED to drive liquid crystal display of various current common and following releases), display screen 4 and electricity
Source (not shown).
The digital signal processor 1 can be existing data signal plate etc., and the digital signal processor 1 is to send out
Give each brightness data of the viewing area (41,42 ... 4N) under current scene and later scene.The digital signal processor 1
Brightness data derive from from picture data in the storage device and external device of the liquid crystal display etc..
The viewing area (41,42 ... 4N) can be the corresponding viewing area of single led lamp (41,42 ... 4N), also may be used
The corresponding viewing area of multiple LEDs (41,42 ... 4N) is thought, in such as Fig. 4 concrete application example, for reduction power consumption, reality
Preferable each pixel will not be taken individually to control in, be some typically by 4 points of the display screen of the liquid crystal display
Individual viewing area (41,42 ... 4N), each viewing area (41,42 ... 4N) multiple LEDs of correspondence are the multiple pixels of correspondence,
Specifically, in this application embodiment, the resolution ratio of the display screen 4 of the liquid crystal display is 1920*1080, the liquid crystal
Show that the display screen 4 of device is divided into 96 viewing areas (41,42 ... 4N).Current scene is i.e. will display picture, later scene
For next display picture after having been shown in current scene, therefore, later scene can look at as next but one scene
Current scene, current scene and later scene are two adjacent display pictures, and current scene is previous display picture, next
Scene is latter display picture.
The controller 2 includes brightness value acquisition module 21, luminance difference computing module 22, drive control module 23.Institute
Brightness value acquisition module 21 is stated to each the brightness number of viewing area (41,42 ... 4N) under current scene and later scene
According to obtaining each brightness value of the viewing area (41,42 ... 4N) under current scene and later scene.The luminance difference is calculated
Module 22 compares to calculate each luminance difference of the viewing area (41,42 ... 4N) under current scene and later scene
Size between the luminance difference and setting threshold values.The drive control module 23 is to when a certain viewing area (41,42 ...
When luminance difference 4N) is more than the setting threshold values, controls the driver 3 to drive the LED of the display screen 4, make
The a certain viewing area (41,42 ... 4N) shown under current scene with median luminance value, a certain viewing area
A certain viewing area (41,42 ... 4N) described in median luminance value ＜ described in the brightness value L T.LT.LT of (41,42 ... 4N) under current scene
Brightness value under later scene.
The setting threshold values can be an empirical value, when the luminance difference is more than the setting threshold values, Yong Hu
Observe current scene and during later scene, hence it is evident that feel a certain viewing area (41,42 ... 4N) brightness occur it is obvious
Change.Therefore, in the present invention, when a certain viewing area (41,42 ... 4N) is under current scene and later scene
Difference in brightness is larger, i.e., can be when current scene is shown by a certain viewing area when beyond the setting threshold values
(41,42 ... 4N) is shown with the median luminance value, and then is caused, a certain viewing area (41,42 ... 4N) is being worked as
Brightness change under preceding scene and later scene reduces, and improves visual experience effect, so as to avoid a certain viewing area
(41,42 ... 4N) brightness when current scene and later scene are shown changes too greatly, and causes visual experience effect too poor.
When a certain difference in brightness of the viewing area (41,42 ... 4N) under current scene and later scene is larger, i.e.,
Beyond it is described setting threshold values when, can when current scene is shown by a certain viewing area (41,42 ... 4N) with institute
State median luminance value to be shown, and then cause, a certain viewing area (41,42 ... 4N) is in current scene and later scene
Under brightness change reduce, and visual experience effect is improved, so as to avoid a certain viewing area (41,42 ... 4N) current
Brightness changes too greatly when scene and later scene display, and causes visual experience effect too poor.
The drive control module 23 is also less than institute to the luminance difference as a certain viewing area (41,42 ... 4N)
When stating setting threshold values, control the driver 3 to drive the LED of the display screen 4, make a certain viewing area (41,42 ...
4N) shown under current scene with a certain brightness value of the viewing area (41,42 ... 4N) under current scene.Work as institute
When stating luminance difference less than the setting threshold values, user is imperceptible described a certain when observing current scene and later scene
Obvious change occurs for the brightness of viewing area (41,42 ... 4N).
In the present embodiment, brightness value of a certain viewing area (41,42 ... 4N) under current scene is first bright
Angle value (such as gray value is 0), brightness value of a certain viewing area (41,42 ... 4N) under later scene is the second brightness
Value (such as gray value is 255), each viewing area (41,42 ... 4N) using first brightness value when being shown as dim shape
State, when being shown using second brightness value as illuminating state, the adjacent display with a certain viewing area (41,42 ... 4N)
(41,42 ... 4N) is shown under current scene with second brightness value in region, bright with described first under later scene
Angle value is shown.Namely in the present embodiment, show as continuously lighting on the display screen 4 of the liquid crystal display is dynamic
Make.
The digital signal processor 1 includes brightness data sending module 11, brightness data recycling module 12, brightness data
Comparing module 13 and data send control module 14, the brightness value acquisition module 21 include brightness data receiving unit 211,
Brightness data feedback unit 212 and brightness data pickup unit 213.
The digital signal processor 1 obtains each the brightness value work of viewing area (41,42 ... 4N) under current scene
Make process as follows：
The brightness data sending module 11 sends each the brightness number of viewing area (41,42 ... 4N) under current scene
According to, the brightness data receiving unit 211 receives each brightness data of viewing area (41,42 ... 4N) under current scene,
Each viewing area that the brightness data feedback unit 212 is arrived to the feedback reception of brightness data recycling module 12 (41,
42 ... 4N) brightness data under current scene, the brightness data recycling module 12 receives each viewing area of feedback
The brightness data of (41,42 ... 4N) under scene, the brightness data comparing module 13 by the feedback received each display
Brightness data of the region (41,42 ... 4N) under current scene is with each issued viewing area (41,42 ... 4N) current
Brightness data under scene is compared：When comparison result is consistent, the data send control module 14 and control the brightness
Data transmission blocks 11 send each brightness data of viewing area (41,42 ... 4N) under later scene, when comparison result not
When consistent, the data send control module 14 and control the brightness data sending module 11 to continue to send each viewing area
(41,42 ... 4N) in the brightness data of corresponding scene, the brightness data pickup unit 213 by finally receive each show
Show brightness data of the region (41,42 ... 4N) under current scene as each viewing area (41,42 ... 4N) in current scene
Under brightness value.
The digital signal processor 1 obtains each the brightness value work of viewing area (41,42 ... 4N) under later scene
Make process as follows：
The brightness data receiving unit 211 receives each brightness of viewing area (41,42 ... 4N) under later scene
Data, each viewing area that the brightness data feedback unit 212 is arrived to the feedback reception of brightness data recycling module 12
The brightness data of (41,42 ... 4N) under later scene, the brightness data recycling module 12 receives each viewing area of feedback
Brightness data of the domain (41,42 ... 4N) under later scene, the brightness data comparing module 13 is by each of the feedback received
Brightness data of the individual viewing area (41,42 ... 4N) under later scene and each issued viewing area (41,42 ... 4N)
Brightness data under later scene is compared：When comparison result is consistent, the data send the control of control module 14 institute
State brightness data sending module 11 and send each brightness data of viewing area (41,42 ... 4N) under subsequent scenario；Work as comparison
As a result when inconsistent, the data send control module 14 and control the brightness data sending module 11 to continue to send each display
Brightness data of the region (41,42 ... 4N) under next scene；The brightness data pickup unit 213 will be finally received
Each brightness data of viewing area (41,42 ... 4N) under later scene is as each viewing area (41,42 ... 4N) under
Brightness value under one scene.
Figure 11 to Figure 14 is referred to, the liquid crystal display and its an Application Example of display methods provided in the present invention：
The derived digital signal is specially data signal plate, and controller is specially the MCU of crossing current plate, and driver is crossing current plate
LED drive chip, also, the MCU is to receive each under current scene and later scene by the LED drive chip
The brightness data of viewing area.
To reduce preferable each pixel will not be taken individually to control in power consumption, practical application, typically by the liquid crystal
The display screen of display is divided into multiple viewing areas, the multiple pixels of each viewing area correspondence, specifically, in this implementation
In example, the display screen of the liquid crystal display is divided into 96 viewing areas, in the present embodiment, power panel gives crossing current plate sum
Word signal plate, which is provided in 12V power supplys, the data signal plate, voltage conversion circuit or chip etc., and the power panel is provided
Voltage carry out being converted to the voltage required for data signal plate work, similarly, voltage is also configured with crossing current plate
Change-over circuit or chip etc., the voltage after conversion is for requirements of one's work such as MCU, the LED drive chips of the crossing current plate.
The pin that data signal plate has with LED drive chip is connected in crossing current plate has SPI_EN, SPI_MOSI, SPI_
6 16 paths of LEDs driving chips are designed with MISO, SPI_SCK, Vsync, crossing current plate, 16 can be driven per LEDs driving chip
The LED of individual viewing area, therefore the LED of 96 viewing areas can be driven altogether, LED drive chip has and numeral letter
The pin of the SOC connections of number plate has SPI_EN, SIMO, SOMI, SCK, Vsync, wherein, SPI_EN draws for the enable of driving chip
Pin, SIMO correspondences are connected with SPI_MOSI, represent main frame output and slave input, i.e. data signal plate is defeated by LED drive chip
Signal, the signal be mainly used to transmission correspondence each viewing area pixel brightness letter data, MISO correspondence SPI_SOMI,
The signal that LED drive chip is defeated by SOC is represented, that is, the brightness data of the pixel for each viewing area fed back is to brightness number
According to confirmation, if the brightness data that the brightness data that is received by SPI_SOMI of data signal plate is exported with SPI_MOSI is not
When consistent, then represent brightness data transmitted from the data signal plate to the LED drive chip occur it is abnormal, can continue into
Row transmission；SPI_SCK correspondence SCK are there is provided the clock signal of LED drive chip, and Vsync correspondences Vsync provide field sync signal.
Each viewing area is the viewing area corresponding to multiple LEDs, and the driver 3 is included to drive respectively
Set multiple driving chips of the LED of quantity, brightness data input pin and the number of one of them driving chip
Connected according to the brightness data output pin of signal plate, the brightness data input pin of remaining driving chip successively with it is adjacent
Driving chip brightness data output pin be electrically connected with, brightness data output pin and institute positioned at last driving chip
The brightness data input pin connection of data signal plate is stated, the controller is electrically connected with the multiple driving chip respectively,
To obtain brightness data of each viewing area under current scene and later scene from the multiple driving chip, specifically such as
Under：In LED drive chip, core is driven to the first LEDs using the connected mode of daisy chain, i.e. SPI_MOSI signal output
Piece, the SIMO of the first LEDs driving chip are received after signal, and the second LEDs driving chip is transferred to by the SOMI of itself
SIMO then the second LEDs driving chip the signal received from SIMO is transferred to the 3rd by the SOMI of itself chip
The SIMO of LEDs driving chip ..., until the 6th LEDs driving chip, the SOMI of the 6th LEDs driving chip is exported
To the SPI_MISO of data signal plate, and Vsync, SPI_EN, SPI_SCK of the data signal plate then drive with every LEDs
Chip corresponding Vsync, SPI_EN and SCK are connected respectively, that is, parallel relationship.
MCU controls obtain the brightness for each viewing area that data signal plate is transmitted per paths of LEDs driving chip respectively
Data, for example：First via LED drive chip obtains the brightness data in 1-16 regions, the second paths of LEDs driving chip and obtains 17-32
The brightness data in region, the 3rd paths of LEDs driving chip obtain the brightness data in 33-48 regions, the 4th paths of LEDs driving chip and obtained
The brightness data in 49-64 regions, the 5th paths of LEDs driving chip obtain the brightness data in 65-80 regions, the 6th paths of LEDs driving core
Piece obtains the brightness data in 81-96 regions.
The display side of the liquid crystal display provided below by taking the display of 1920*1080 resolution ratio as an example the present embodiment
Method is illustrated：
Each viewing area of the display of 1920*1080 resolution ratio is listed such as Figure 12, is numbered according to numerical order, its
Middle pixel is classified as A1B1, A1B2, A1B3.....A1B1079, A1B1080 on to the down the 1st；Pixel is on to down
2nd is classified as A2B1, A2B2, A2B3.....A2B1079, A3B1080；Pixel on to the down the 3rd be classified as A3B1, A3B2,
A3B3.....A3B1079、A3B1080；....；Until the 1920th row pixel on to down be A1920B1,
A1920B2、A1920B3.....A1920B1079、A1920B1080；And the pixel is distributed according to following viewing area
It is evenly distributed in each viewing area.
In terms of the transmission of data, first via LED drive chip is obtained after the brightness data of 1-16 viewing areas, and oneself is obtained
Content of the brightness data table taken to the 1-16 viewing areas of the whole brightness data table of replacement；Second paths of LEDs driving chip is obtained
After the brightness data of 17-32 viewing areas, the brightness data table oneself obtained is shown to the 17-32 for replacing whole brightness data table
Show the content in region；3rd paths of LEDs driving chip is obtained after the brightness data of 33-48 viewing areas, the brightness that oneself is obtained
Content of the tables of data to the 33-48 viewing areas of the whole brightness data table of replacement；4th paths of LEDs driving chip obtains 49-64 and shown
Show after the brightness data in region, by 49-64 viewing area of the brightness data table oneself obtained to the whole brightness data table of replacement
Content；5th paths of LEDs driving chip is obtained after the brightness data of 65-80 viewing areas, the brightness data table that oneself is obtained
To the content for the 65-80 viewing areas for replacing whole brightness data table；6th paths of LEDs driving chip obtains 81-96 viewing areas
Brightness data after, by the brightness data table oneself obtained to replacing the contents of the 81-96 viewing areas of whole brightness data table,
In this way, the brightness data that the brightness data that final data signal plate is received feeds back for crossing current plate.
Flow in terms of plate, MCU is calculated according to the brightness data of each viewing area pixel of each viewing area according to setting
Method, obtains the current value that the brightness required for viewing area is shown is shown, controls each driving chip to drive each viewing area respectively
The LED in domain lights according to a certain percentage.If one LED of preferable each pixel correspondence, then directly according to each picture
The brightness of element drives each LED, then need not estimate that each viewing area shows required brightness by algorithm.
Explained so that LED drive chip is driven LED by pulse width as an example：If reach maximum in brightness value
In the case of, the dutycycle of pulse width is 80%, most dark when, and the dutycycle of pulse width is 10%, in such as Figure 13,
White background representative luminance value in viewing area 4 is in maximum bright spot, in the present embodiment, and the bright spot direction of motion is from a left side
To the right side, and viewing area 4- viewing areas 12- viewing areas 20- viewing areas 28- viewing areas 36- viewing areas are lighted successively
44- viewing areas 52- viewing areas 60- viewing areas 68- viewing areas 76- viewing areas 84- viewing areas 92.Data signal
In terms of plate, brightness data transmission is transmitted according to 2 system, 8 rules, then when pixel corresponds to 0, then the pixel is completely black
It has been shown that, when pixel corresponds to 255, then the pixel is that most bright display is bright spot.
It is current scene in Figure 13：The brightness of viewing area 4 is maximum brightness value, and the brightness of other viewing areas is minimum
Value, then the corresponding brightness data gray value of the pixel of viewing area 4 is 255, and the brightness data gray value of other viewing areas is
0.If Figure 14 is later scene：Viewing area 12 reaches high-high brightness, and other are black background, then by viewing area 12.
First, the MCU of crossing current plate receives the brightness data of each viewing area under current scene by LED drive chip
Afterwards, by viewing area 4, i.e. the 4th tunnel driving output duty cycle of LED drive chip 1 is 80%, other 15 tunnels and other LED
The dutycycle that driving chip group is all exported is 10%, and the brightness data by each viewing area under current scene in advance
(table), is sent to the LED drive chip of crossing current plate, LED drive chip can be to brightness number of each viewing area under current scene
Stored according to (table)；
Then, the MCU of crossing current plate receives the brightness data of each viewing area under later scene by LED drive chip
Afterwards, it is 80% by the 12nd tunnel driving output duty cycle of LED drive chip 1, other 15 tunnels and other LED drive chip groups are complete
The dutycycle of portion's output is 10%, and the brightness data (table) by each viewing area under later scene, is sent to crossing current plate
LED drive chip, LED drive chip can be stored to brightness data (table) of each viewing area under later scene；
Then, MCU is by reading and comparing each viewing area in the LED drive chip in current scene and next field
Brightness data under scape, show that brightness of the viewing area 12 under current scene and later scene is changed greatly, i.e. viewing area
12 by secretly into bright change procedure, therefore, when MCU control LED drive chip driving LEDs show current scene, will show
The dutycycle in region 12, gradually by 10% lifting to 45% (i.e. the half of later scene brightness), and works as and moves to viewing area
20th, viewing area 28, viewing area 36, viewing area 44, viewing area 52, viewing area 60, viewing area 68, viewing area
76th, when viewing area 84, viewing area 92, also successively in current scene, the LED brightness of next viewing area is reached most
The half being worth greatly, i.e. current scene be white scene in viewing area 20, other for it is black when, then by the driving duty of viewing area 28
Than stepping up to 45% (the 12nd tunnel of correspondence LED drive chip 2)；Current scene is that white scene (shows in viewing area 28
Show the driving dutycycle in region 28 by 45% lifting to 80%), other for it is black when, then by the driving dutycycle of viewing area 36 by
Step is lifted to 45% (the 4th tunnel of correspondence LED drive chip 3)；Current scene is white scene in (the i.e. viewing area of viewing area 36
36 driving dutycycle, to 80%), when other are black, is then stepped up the driving dutycycle of viewing area 44 by 45% lifting
To 45% (the 12nd tunnel of correspondence LED drive chip 3)；Current scene is white scene in (the i.e. viewing area 44 of viewing area 44
Dutycycle is driven, to 80%), when other are black, then to be stepped up the driving dutycycle of viewing area 52 by 45% lifting
45% (the 4th tunnel of correspondence LED drive chip 4)；Current scene is white scene in (the i.e. driving of viewing area 52 of viewing area 52
Dutycycle, to 80%), when other are black, is then stepped up the driving dutycycle of viewing area 60 to 45% by 45% lifting
(the 12nd tunnel of correspondence LED drive chip 4)；Current scene is that in viewing area 60, (i.e. the driving of viewing area 60 is accounted for white scene
Sky is than by 45% lifting, to 80%), when other are black, then it is (right to 45% to step up the driving dutycycle of viewing area 68
Answer the 4th tunnel of LED drive chip 5)；Current scene is white scene in (the i.e. driving dutycycle of viewing area 68 of viewing area 68
By 45% lifting to 80%), when other are black, then the driving dutycycle of viewing area 76 is stepped up to 45% (correspondence LED
12nd tunnel of driving chip 5)；Current scene be white scene viewing area 76 (i.e. the driving dutycycle of viewing area 76 by
45% lifting when other are black, then steps up the driving dutycycle of viewing area 84 to 45% (correspondence LED drives to 80%)
4th tunnel of dynamic chip 6)；Current scene is that in viewing area 84, (i.e. the driving dutycycle of viewing area 84 is carried white scene by 45%
It is raised to 80%), when other are black, then steps up the driving dutycycle of viewing area 92 to 45% (correspondence LED drive chip
6 the 12nd tunnel)；When the driving of last viewing area 92, the driving dutycycle of viewing area 96 is by 45% lifting to 80%.
Use with after upper type, because the motion white edge of the boundary effect and contrast in viewing area greatly transports to next show
When showing region, due to the existing bright half of LED before, after handover, relative to mode before, brightness excursion is small,
Because the perception of human eye is in certain scope, with regard to imperceptible LED significantly from secretly to bright change procedure, enhancing
Visual experience.
If above method LED drive chip directly export for electric current, be also same reason, if during black scene,
Required driving current is 10mA, and required brightness is 130mA when most bright., then will display during present image in Figure 12
The electric current in region 12, gradually by 10mA lifting to 70mA (i.e. the half of later scene brightness), and ought move to viewing area 20,
Viewing area 28, viewing area 36, viewing area 44, viewing area 52, viewing area 60, viewing area 68, viewing area 76,
When viewing area 84, viewing area 92, also successively in current scene, the LED brightness of next viewing area is reached into maximum
The half of value, i.e. current scene be white scene in viewing area 20, other for it is black when, then the driving current of viewing area 28 is carried
It is raised to 70mA (the 12nd tunnel of correspondence LED drive chip 2)；Current scene is white scene in (the i.e. viewing area 28 of viewing area 28
Driving current 130mA is arrived by 70mA liftings), other for it is black when, then 70mA is arrived into the lifting of the driving current of viewing area 36 (right
Answer the 4th tunnel of LED drive chip 3)；Current scene be white scene viewing area 36 (i.e. the driving current of viewing area 36 by
130mA is arrived in 70mA liftings), when other are black, then by the driving current lifting of viewing area 44 to 70mA (correspondence LED driving cores
12nd tunnel of piece 3)；Current scene be white scene viewing area 44 (i.e. the driving current of viewing area 44 by 70mA lifting to
130mA), when other are black, then by the driving current lifting of viewing area 52 to 70mA (the 4 of correspondence LED drive chip 4
Road)；Current scene is white scene viewing area 52 (i.e. the driving current of viewing area 52 by 70mA liftings to 130mA), its
When he is black, then by the driving current lifting of viewing area 60 to 70mA (the 12nd tunnel of correspondence LED drive chip 4)；Current field
Scape is white scene viewing area 60 (i.e. the driving current of viewing area 60 is lifted to 130mA by 70mA), when other are black, then
By the driving current lifting of viewing area 68 to 70mA (the 4th tunnel of correspondence LED drive chip 5)；Current scene is that white scene exists
Viewing area 68 (i.e. the driving current of viewing area 68 is lifted to 130mA by 70mA), when other are black, then by viewing area 76
Driving current lifting to 70mA the 12nd tunnel of LED drive chip 5 (correspondence)；Current scene is white scene in viewing area 76
(i.e. the driving current of viewing area 76 is lifted to 130mA by 70mA), when other are black, then by the driving current of viewing area 84
Lift 70mA (the 4th tunnel of correspondence LED drive chip 6)；Current scene is white scene in (the i.e. viewing area 84 of viewing area 84
Driving current 130mA is arrived by 70mA liftings), other for it is black when, then 70mA is arrived into the lifting of the driving current of viewing area 92 (right
Answer the 12nd tunnel of LED drive chip 6)；When the driving of last viewing area 92, the driving current of viewing area 96 is carried by 70mA
It is raised to 130mA.
The preferred embodiments of the present invention are these are only, its scope of the claims is not thereby limited, it is every to utilize explanation of the invention
Equivalent structure or equivalent flow conversion that book and accompanying drawing content are made, are directly or indirectly used in other related technical fields,
It is included within the scope of the present invention.
Claims (9)
1. a kind of display methods of liquid crystal display, it is characterised in that the display methods of the liquid crystal display includes following step
Suddenly：
Obtain brightness value of each viewing area under current scene and later scene；
Calculate luminance difference of each viewing area under current scene and later scene, and relatively more described luminance difference and setting
Size between threshold values；
When the luminance difference of a certain viewing area is more than the setting threshold values, a certain viewing area is controlled current
Shown under scene with median luminance value, intermediate luminance described in brightness value L T.LT.LT of a certain viewing area under current scene
Brightness value of a certain viewing area under later scene described in value ＜；
The step of obtaining brightness value of each viewing area under current scene and later scene includes：
Digital signal processor sends brightness data of each viewing area in current scene to controller；
The controller receives each viewing area after the brightness data of current scene, anti-to the digital signal processor
Brightness data of each viewing area that feedback is received in current scene；
The digital signal processor by each viewing area of the feedback received current scene brightness data with having sent out
The brightness data of the current scene gone out is compared；
When comparison result is consistent, the digital signal processor sends the brightness data of later scene, the control to controller
Device processed using each viewing area finally received current scene brightness data as each described viewing area current
Brightness value under scene；
The controller receives each viewing area after the brightness data of later scene, anti-to the digital signal processor
Brightness data of each viewing area that feedback is received in later scene；
The digital signal processor by each viewing area of the feedback received later scene brightness data with having sent out
The brightness data of the later scene gone out is compared；
When comparison result is consistent, the controller by each viewing area finally received later scene brightness data
It is used as brightness value of each the described viewing area under later scene.
2. the display methods of liquid crystal display as claimed in claim 1, it is characterised in that a certain viewing area is current
Brightness value under scene is the first brightness value, and brightness value of a certain viewing area under later scene is the second brightness value,
Each viewing area when being shown using first brightness value as dim dark state, when being shown using second brightness value as point
Bright state, the brightness value of the viewing area adjacent with a certain viewing area under current scene is the second brightness value, under
Brightness value under one scene is the first brightness value.
3. the display methods of liquid crystal display as claimed in claim 1, it is characterised in that calculate each viewing area current
After luminance difference under scene and later scene, and the step of size relatively between the luminance difference and setting threshold values also
Including：
When the luminance difference of a certain viewing area is less than the setting threshold values, a certain viewing area is controlled current
Shown under scene with brightness value of a certain viewing area under current scene.
4. the display methods of liquid crystal display as claimed in claim 1, it is characterised in that the digital signal processor will connect
Each viewing area of the feedback received is carried out in the brightness data of current scene with the brightness data of issued current scene
After the step of comparison, in addition to：
When comparison result is inconsistent, the digital signal processor continue to the controller send each viewing area work as
The brightness data of preceding scene；
The digital signal processor by each viewing area of the feedback received later scene brightness data with having sent out
After the step of brightness data of the later scene gone out is compared, in addition to：
When comparison result is inconsistent, the digital signal processor continues to send each viewing area under to the controller
The brightness data of one scene.
5. a kind of liquid crystal display, it is characterised in that it includes the digital signal processor, controller, driver being electrically connected with
And display screen, the controller include brightness value acquisition module, luminance difference computing module, drive control module：
The digital signal processor is to send brightness data of each viewing area under current scene and later scene；
The brightness value acquisition module is used to brightness data of each viewing area under current scene and later scene, obtains each
Brightness value of the individual viewing area under current scene and later scene；
The luminance difference computing module to calculate luminance difference of each viewing area under current scene and later scene,
And the size between relatively more described luminance difference and setting threshold values；
The drive control module is when the luminance difference of a certain viewing area is more than the setting threshold values, to control institute
The LED that driver drives the display screen is stated, a certain viewing area is carried out under current scene with median luminance value
It has been shown that, a certain viewing area described in median luminance value ＜ described in brightness value L T.LT.LT of a certain viewing area under current scene exists
Brightness value under later scene；
The digital signal processor includes brightness data sending module, brightness data recycling module, brightness data comparing module
And data send control module, the brightness value acquisition module includes brightness data receiving unit, brightness data feedback unit
And brightness data pickup unit：
The brightness data sending module is to occur brightness data of each viewing area under current scene；
The brightness data receiving unit is to receive brightness data of each viewing area under current scene；
Each viewing area that the brightness data feedback unit is used to arrive to the brightness data recycling module feedback reception exists
Brightness data under current scene；
The brightness data recycling module is used to brightness data of each viewing area of reversed feedback under scene；
The brightness data comparing module is to the brightness number by each viewing area of the feedback received under current scene
It is compared according to the brightness data with each issued viewing area under current scene；
The data send control module when comparison result is consistent, to control the brightness data sending module to send each
Brightness data of the viewing area under later scene；
The brightness data pickup unit is to the brightness data by each viewing area finally received under later scene
It is used as brightness value of each viewing area under later scene；
The brightness data receiving unit is also to receive brightness data of each viewing area under later scene；
Each viewing area of the brightness data feedback unit also to be arrived to the brightness data recycling module feedback reception
Brightness data under later scene；
The brightness data recycling module is also used to brightness data of each viewing area of reversed feedback under later scene；
The brightness data comparing module is also to the brightness by each viewing area of the feedback received under later scene
Brightness data of the data with each issued viewing area under later scene is compared；
It is also each when comparison result is consistent, to control the brightness data sending module to send that the data send control module
Brightness data of the individual viewing area under subsequent scenario；
The brightness data pickup unit is also to the brightness number by each viewing area finally received under later scene
According to the brightness value as each viewing area under later scene.
6. liquid crystal display as claimed in claim 5, it is characterised in that a certain viewing area is bright under current scene
Angle value is the first brightness value, and brightness value of a certain viewing area under later scene is the second brightness value, each display
Region when being shown using first brightness value as dim dark state, when being shown using second brightness value as illuminating state, with
Brightness value of the adjacent viewing area in a certain viewing area under current scene is the second brightness value, under later scene
Brightness value is the first brightness value.
7. liquid crystal display as claimed in claim 5, it is characterised in that the drive control module is also to when a certain display
When the luminance difference in region is less than the setting threshold values, controls the driver to drive the LED of the display screen, make institute
A certain viewing area is stated under current scene and shown with brightness value of a certain viewing area under current scene.
8. liquid crystal display as claimed in claim 5, it is characterised in that the data send control module also to when comparison
As a result when inconsistent, the brightness data sending module is controlled to continue to send brightness number of each viewing area in corresponding scene
According to.
9. liquid crystal display as claimed in claim 5, it is characterised in that each viewing area is corresponding to multiple LEDs
Viewing area, the driver include to drive respectively setting quantity LED multiple driving chips, one of institute
The brightness data input pin for stating driving chip is connected with the brightness data output pin of the data-signal plate, described in remaining
The brightness data input pin of driving chip is electrically connected with the brightness data output pin of adjacent driving chip successively, is located at
The brightness data output pin of last driving chip is connected with the brightness data input pin of the digital signal processor, institute
State controller to be electrically connected with the multiple driving chip respectively, to obtain each viewing area from the multiple driving chip
Brightness data under current scene and later scene.
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