CN106782354B - Back light brightness regulating method, device and display equipment - Google Patents
Back light brightness regulating method, device and display equipment Download PDFInfo
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- CN106782354B CN106782354B CN201710218553.8A CN201710218553A CN106782354B CN 106782354 B CN106782354 B CN 106782354B CN 201710218553 A CN201710218553 A CN 201710218553A CN 106782354 B CN106782354 B CN 106782354B
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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 present invention provides a kind of back light brightness regulating method, device and display equipment, is related to showing equipment technical field.Method includes: the picture brightness for obtaining played image；The backlight illumination of adjustment display equipment makes the backlight illumination variation tendency of the display equipment be consistent with the picture brightness variation tendency of the played image.In this way, can improve be not inconsistent because of the variation tendency of backlight illumination and the variation tendency of image frame brightness caused by viewing experience it is bad the problems such as.
Description
Technical field
The present invention relates to display equipment technical fields, in particular to a kind of back light brightness regulating method, device and show
Show equipment.
Background technique
Show that equipment during carrying out scene switching, can change backlight illumination according to the variation of picture brightness, to mention
The dynamic contrast of hi-vision.But in existing backlight illumination regulation technology, when backlight illumination is adjusted, it is understood that there may be
The case where variation of backlight illumination is not consistent with the variation of picture brightness influences user experience so as to cause viewing effect reduction.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of back light brightness regulating method, device and display equipment, to change
The kind above problem.
To achieve the goals above, present pre-ferred embodiments provide a kind of back light brightness regulating method, comprising:
Obtain the picture brightness of played image；
The backlight illumination of adjustment display equipment makes the display backlight illumination variation tendency of equipment and described played
The picture brightness variation tendency of image is consistent.
Preferably, the played image includes the image of preset quantity timing node before current time node；
The backlight illumination of adjustment display equipment makes the display backlight illumination variation tendency of equipment and described played
The step of picture brightness variation tendency of image is consistent, comprising:
According to the picture brightness variation tendency of the image of the preset quantity timing node, the figure of each timing node is adjusted
Weighing factor value of the picture brightness of picture to the picture brightness of the image of current time node；
According to the picture brightness of the image of each timing node and weighted value adjusted, current time node is calculated
The picture brightness of image；
Backlight illumination is adjusted to brightness value corresponding with calculated picture brightness, is stored in the display equipment
Corresponding relationship between different pictures brightness and different brightness values.
Preferably, according to the picture brightness variation tendency of the image of the preset quantity timing node, each time is adjusted
The step of picture brightness of the image of node is to the weighing factor value of the picture brightness of the image of current time node, comprising:
It calculates in the preset quantity timing node, it is flat between the picture brightness of the image of adjacent time node two-by-two
Equal amplitude of variation；
Figure of the picture brightness to current time node of the image of each timing node is adjusted according to the mean range
The weighing factor value of the picture brightness of picture.
Preferably, the picture brightness of the image of each timing node is adjusted according to the mean range to current time section
The step of weighing factor value of the picture brightness of the image of point, comprising:
Default weighting function is adjusted according to the mean range；
Recalculate to obtain the picture brightness of the image of each timing node to current according to default weighting function adjusted
The weighing factor value of the picture brightness of the image of timing node.
Preferably, the sum of described each weighing factor value is equal to the preset quantity.
Preferably, the default weighting function is linear weighting function or nonlinear weight function, according to the average change
Change amplitude adjusts the step of default weighting function, comprising:
When the mean range increases, the coefficient of the default weighting function is adjusted, is made in the first preset range
The corresponding functional value of timing node increase, reduce the corresponding functional value of the timing node in the second preset range；
When the mean range reduces, the coefficient of the default weighting function is adjusted, is made in the first preset range
The corresponding functional value of timing node reduce, increase the corresponding functional value of the timing node in the second preset range；
The division and the type and coefficient phase of the default weighting function of first preset range and the second preset range
Matching.
Present pre-ferred embodiments also provide a kind of backlight illumination regulating device, comprising:
Picture brightness obtains module, for obtaining the picture brightness of played image；
Backlight illumination adjusts module, for adjusting the backlight illumination of display equipment, makes the backlight illumination of the display equipment
Variation tendency is consistent with the picture brightness variation tendency of the played image.
Preferably, the played image includes the image of preset quantity timing node before current time node；
The backlight illumination adjusts module
Weight adjusting submodule, the picture brightness variation for the image according to the preset quantity timing node become
Gesture adjusts the picture brightness of the image of each timing node to the weighing factor value of the picture brightness of the image of current time node；
Current picture brightness calculation submodule, for according to the image of each timing node picture brightness and power adjusted
The picture brightness of the image of current time node is calculated in weight values；
Brightness adjustment submodule, for adjusting backlight illumination to brightness value corresponding with calculated picture brightness,
The corresponding relationship being stored in the display equipment between different pictures brightness and different brightness values.
Preferably, the weight adjusting submodule includes:
Mean range computing unit, for calculating in the preset quantity timing node, adjacent time section two-by-two
Mean range between the picture brightness of the image of point；
Weighted value adjustment unit, the picture brightness of the image for adjusting each timing node according to the mean range
To the weighing factor value of the picture brightness of the image of current time node.
Preferably, the weighted value adjustment unit includes:
Weighting function adjusts subelement, for adjusting default weighting function according to the mean range；
Weight calculation subelement, for recalculating to obtain the figure of each timing node according to default weighting function adjusted
Weighing factor value of the picture brightness of picture to the picture brightness of the image of current time node.
Preferably, the sum of described each weighing factor value is equal to the preset quantity.
Preferably, the default weighting function is linear weighting function or nonlinear weight function, the weighting function tune
Whole subelement includes:
The first adjustment time subelement, for adjusting the default weighting function when the mean range increases
Coefficient increases the corresponding functional value of the timing node in the first preset range, makes the timing node pair in the second preset range
The functional value answered reduces；
Second adjustment time subelement, for adjusting the default weighting function when the mean range reduces
Coefficient reduces the corresponding functional value of the timing node in the first preset range, makes the timing node pair in the second preset range
The functional value answered increases；
The division and the type and coefficient phase of the default weighting function of first preset range and the second preset range
Matching.
Present pre-ferred embodiments also provide a kind of display equipment, and the display equipment includes that backlight provided by the invention is bright
Spend regulating device.
Back light brightness regulating method, device and display equipment provided in an embodiment of the present invention, can be according to played figure
The picture brightness variation tendency of picture is adjusted backlight illumination, makes the variation tendency of backlight illumination and the picture of played image
Face brightness change trend is consistent, to reach better viewing effect.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the block diagram of display equipment provided in an embodiment of the present invention.
Fig. 2 is the flow diagram of back light brightness regulating method provided in an embodiment of the present invention.
Fig. 3 is the sub-step schematic diagram of step S102 shown in Fig. 2.
Fig. 4 is the sub-step schematic diagram of step S201 shown in Fig. 3.
Fig. 5 is the sub-step schematic diagram of step S302 shown in Fig. 4.
Fig. 6 is that a kind of relationship of the mean range of weighting curve and picture brightness provided in an embodiment of the present invention is illustrated
Figure.
Fig. 7 is a kind of functional block diagram of backlight illumination regulating device provided in an embodiment of the present invention.
Fig. 8 is the submodule block diagram that backlight illumination shown in Fig. 7 adjusts module.
Fig. 9 is the submodule block diagram of weight adjusting submodule shown in Fig. 8.
Figure 10 is the submodule block diagram of weighted value adjustment unit shown in Fig. 9.
Icon: 100- shows equipment；110- memory；120- processor；130- display unit；200- backlight illumination is adjusted
Device；210- picture brightness obtains module；220- backlight illumination adjusts module；221- weight adjusting submodule；2211- averagely becomes
Change magnitude computation unit；2212- weighted value adjustment unit；301- weighting function adjusts subelement；3011- the first adjustment second son list
Member；3012- second adjustment time subelement；302- weight calculation subelement；222- current picture brightness calculation submodule；223- is bright
Spend adjusting submodule.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
Referring to Fig. 1, being the block diagram for the display equipment 100 that present pre-ferred embodiments provide.The display is set
Standby 100 include backlight illumination regulating device 200, memory 110, processor 120 and display unit 130.
The memory 110, processor 120 and each element of display unit 130 are directly or indirectly electrical between each other
Connection, to realize the transmission or interaction of data.For example, these elements can pass through one or more communication bus or letter between each other
Number line, which is realized, to be electrically connected.The backlight illumination regulating device 200 includes at least one can be with software or firmware (firmware)
Form be stored in the software function module in the memory 110.The processor 120 is for executing the memory 110
The executable module of middle storage, such as software function module included by the backlight illumination regulating device 200 and computer journey
Sequence etc..
Wherein, the memory 110 may be, but not limited to, random access memory (Random Access
Memory, RAM), read-only memory (Read Only Memory, ROM), programmable read only memory (Programmable
Read-Only Memory, PROM), erasable read-only memory (Erasable Programmable Read-Only
Memory, EPROM), electricallyerasable ROM (EEROM) (Electric Erasable Programmable Read-Only
Memory, EEPROM) etc..
The processor 120 can be a kind of IC chip, the processing capacity with signal.The processor 120
It can be general processor, including central processing unit (Central Processing Unit, abbreviation CPU), network processing unit
(Network Processor, abbreviation NP) etc..Can also be digital signal processor (DSP), specific integrated circuit (ASIC),
Field programmable gate array (FPGA) either other programmable logic device, discrete gate or transistor logic, discrete hard
Part component.It may be implemented or execute disclosed each method, step and the logic diagram in the embodiment of the present invention.General processor
It can be microprocessor or the processor be also possible to any conventional processor etc..
For the memory 110 for storing program, the processor 120 executes the journey after receiving and executing instruction
Sequence.The display unit 130 is used to provide an interactive interface between the display equipment 100 and user, or for showing
Image.In the present embodiment, the display unit 130 is displayed for being stored in the figure in the video memory of the display equipment 100
Shape information or image information.
It is appreciated that structure shown in FIG. 1 is only to illustrate, display equipment 100 can also include it is more than shown in Fig. 1 or
The less component of person, or with the configuration different from shown in Fig. 1.Each component shown in FIG. 1 can using hardware, software or its
Combination is realized.
Referring to Fig. 2, being the flow diagram for the back light brightness regulating method that present pre-ferred embodiments provide, the back
Brightness adjusting method can be applied to display equipment 100 shown in FIG. 1.Specific steps shown in Fig. 2 will be done in detail below
It illustrates.
Step S101: the picture brightness of played image is obtained.
In practical applications, the picture brightness of the currently playing image of display equipment 100 can be by played image
Picture brightness is estimated to obtain.There are simple mapping relations, that is, the backlight between the picture brightness and backlight illumination of image
The pixel that brightness is used to keep image bright is brighter, and dark pixel is darker.Therefore, it is possible to according to the picture brightness of played image
The backlight illumination of present image is adjusted.
In the present embodiment, the picture brightness can be the flat of some region of the average brightness or image of image
Equal brightness.The picture brightness of the played image can be the figure of preset quantity timing node before current time node
Picture.Wherein, the timing node can be preset duration, be also possible to each frame image corresponding period, every two field pictures
Corresponding period or every preset quantity frame image corresponding period, the present embodiment are without limitation.Preferably, this reality
It applies in example, the timing node is a frame image corresponding period.
Step S102: the backlight illumination of adjustment display equipment 100 makes the backlight illumination variation of the display equipment 100 become
Gesture is consistent with the picture brightness variation tendency of the played image.
In practical applications, when display equipment 100 plays video, the picture brightness of each frame image is constantly changing, such as
Fruit is only mechanically adjusted backlight illumination according to the picture brightness of present image when backlight illumination is adjusted,
Spectators will be made obviously to perceive backlight flicker, reduce viewing experience.If only according to the figure played before current time
As the average value of picture brightness, backlight illumination is adjusted, it will the picture brightness and backlight illumination for causing a frame image are not
It is consistent, influences the viewing effect of spectators.
Thus, in the present embodiment, backlight illumination is adjusted according to the picture brightness variation tendency of played image
Section makes to show that the backlight illumination variation tendency of equipment 100 is consistent with the picture brightness variation tendency of the played image, such as
This, can be improved dynamic contrast, to reach better display effect.
Optionally, as shown in figure 3, the step S102 may include step S201, step S202 and step S203.
Step S201: according to the picture brightness variation tendency of the image of the preset quantity timing node, when adjusting each
Weighing factor value of the picture brightness of the image of intermediate node to the picture brightness of the image of current time node.
Step S202: it according to the picture brightness of the image of each timing node and weighted value adjusted, is calculated current
The picture brightness of the image of timing node.
In the present embodiment, the picture brightness of the image of the current time node can be by pre- before current time node
If the picture brightness weighted calculation of the image of quantity timing node obtains.That is, in the preset quantity timing node, often
All there is a corresponding weighted value in the picture brightness of the image of a timing node, for characterizing its figure to current time node
The influence degree of the picture brightness of picture.
Assuming that PCnThe picture brightness of the image of current time node n is indicated, and the preset quantity is N, that is, working as
The picture brightness of the image of preceding timing node n, can be by the picture brightness of the image of the top n timing node of current time node
Weighted calculation obtains.Assuming that in N number of timing node, the weighted value E of i-th of timing nodeiIt indicates, then current time section
The picture brightness PC of the image of point nnIt can be calculated by following formula.
It should be noted that in the present embodiment, the sum of the weighted value of picture brightness of image of N number of timing node
Equal to the preset quantity N.By taking a timing node corresponds to a frame image as an example, the picture of N frame image before current image frame
The value of the luminance weighted summation in face is N times of the picture brightness of the current image frame, therefore when being adjusted to each weighted value, it needs
The sum of each weighted value is maintained N.That is, the picture brightness of the image of N number of timing node meets following formula.
It, can segmentum intercalaris when will be described N number of due to when the picture brightness of the image to N number of timing node is weighted and averaged
The sum of picture brightness weighting of the image of point is divided by total weighted value, and total weighted value is N, the then picture brightness being finally calculated
Value is the picture brightness of a frame image.In this way, the picture brightness of picture brightness value and current image frame that weighted calculation obtains it
Between be mutually matched, can be using the picture brightness value that weighted calculation obtains as the picture brightness of current image frame.
In the present embodiment, according to the picture brightness variation tendency of the image of the preset quantity timing node, adjustment
The picture brightness of the image of each timing node is to the weighing factor value of the picture brightness of the image of current time node, that is, will
The weighted value of the picture brightness of the image of the preset quantity timing node is associated with the variation tendency of its picture brightness.Such as
This, the figure of the preset quantity timing node is able to reflect out according to the picture brightness that each weighted value weighted calculation obtains
The variation tendency of the picture brightness of picture.
Step S203: backlight illumination is adjusted to brightness value corresponding with calculated picture brightness.
In the present embodiment, pair being stored in the display equipment 100 between different pictures brightness and different brightness values
It should be related to.
Optionally, as shown in figure 4, the step S201 may include step S301 and step S302.
Step S301: it calculates in the preset quantity timing node, the picture of the image of adjacent time node is bright two-by-two
Mean range between degree.
According to the actual situation, in the preset quantity timing node, the picture of the image of adjacent time node is bright two-by-two
Mean range between degree is bigger, shows that the picture brightness variation of the image of the preset quantity timing node is faster,
Conversely, then showing that the picture brightness variation of the image of the preset quantity timing node is slower.
Step S302: the picture brightness of the image of each timing node is adjusted to current time according to the mean range
The weighing factor value of the picture brightness of the image of node.
Optionally, as shown in figure 5, in the present embodiment, the step S302 may include step S401 and step S402.
Step S401: default weighting function is adjusted according to the mean range.
Step S402: the picture for recalculating to obtain the image of each timing node according to default weighting function adjusted is bright
Spend the weighing factor value of the picture brightness to the image of current time node.
Wherein, the default weighting function is for calculating in the preset quantity timing node, the figure of each timing node
The weighted value of influence of the picture brightness of picture to the picture brightness of the image of current time node.The default weighting function can be with
It is without limitation for linear weighting function or nonlinear weight function, the present embodiment.
By taking linear weighting function as an example, the linear weighting function can be shown below.
Ei=ai+b (3)
Wherein, EiIt indicates in the preset quantity timing node shared by the picture brightness of the image of i-th of timing node
Weight, it will be understood that when i is bigger, EiCorresponding timing node is closer apart from current time node.A can be according to described
Mean range determines, so that the linear weighting function changes with the variation of the mean range, to make
The weighted value being calculated also with the mean range variation and change.
In the present embodiment, the mean range can lead on the basis of above-mentioned calculating formula (1), (2) and (3)
Following calculating formula is crossed to be calculated.
Wherein, the mean range S can normalize to [0,1] section, and by the mean change width after normalization
Spend the slope a as the linear weighting function.In this way, the mean range after normalization, that is, the linear weighting function
Slope a can be calculated by following formula.
Wherein, MaxValue indicates in the preset quantity timing node picture between any two adjacent time node
The maximum changing value of brightness.
In this way, when the mean range variation when, the weighting curve also correspondence changes, thus it is each when segmentum intercalaris
Corresponding variation also occurs for the weighted value of the picture brightness of the image of point.
Optionally, in the present embodiment, the step S401 can be realized by following steps.
When the mean range increases, the coefficient of the default weighting function is adjusted, is made in the first preset range
The corresponding functional value of timing node increase, reduce the corresponding functional value of the timing node in the second preset range.
When the mean range reduces, the coefficient of the default weighting function is adjusted, is made in the first preset range
The corresponding functional value of timing node reduce, increase the corresponding functional value of the timing node in the second preset range.
Wherein, the division of first preset range and the second preset range and the type of the default weighting function and it is
Number matches.Due to the default weighting function functional value be sometime the image of node picture brightness to it is current when
The weighing factor value of the picture brightness of the image of intermediate node, thus, the tune of default weighting function value corresponding to the timing node
Whole is the weighing factor value to the picture brightness of the image of the timing node to the picture brightness of the image of current time node
Adjustment.
In the present embodiment, either linear weighting function or nonlinear weight function, essence are all, described flat
When equal amplitude of variation increases, weight shared by the picture brightness of the image of the timing node close from current time node is increased, it will
Weight shared by the picture brightness of the image of the timing node remote from current time node reduces.Wherein, described from current time section
The point close period is first preset range, and the period remote from current time node is the described second default model
It encloses.
With above-mentioned linear weighting function EiFor=ai+b, as shown in fig. 6, being the weight under different mean ranges
Curve synoptic diagram.Wherein, horizontal axis indicate current time node before N number of timing node, origin indicate current time node it
Preceding n-th timing node, the longitudinal axis indicate the corresponding weight of picture brightness of the image of the top n timing node of current time node
Value.Straight line L1 indicate a=0 when weighting curve, straight line L2 indicate a=0.5 when weighting curve, straight line L3 indicate a=1 when
Weighting curve.
Join solution formula (2) and formula (3), it is availableThat is, the picture brightness of the image at N/2 point
Weighted value will not change with the variation of the mean range.In this way, the timing node between 0 and N/2 can be regarded
Make apart from the farther away timing node of current time node, by the timing node between N/2 and N be regarded as apart from current time node compared with
Close timing node.
For the timing node k1 between current time node and N/2, that is, farther away apart from current time node
Timing node k1, with the increase of mean range S, weighted value reduces, with the reduction of mean range S, power
Weight values increase.For the timing node k2 between N/2 and N, that is, apart from the closer timing node of current time node
K2, with the increase of mean range S, weighted value increases, and with the reduction of mean range S, weighted value reduces.
When the default weighting function is nonlinear weight function, first preset range and the second preset range can
Specifically to be divided according to the coefficient of the nonlinear weight function, the present embodiment is without limitation.
As shown in fig. 7, present pre-ferred embodiments also provide a kind of backlight illumination regulating device 200, the backlight illumination
Regulating device 200 includes that picture brightness obtains module 210 and backlight illumination adjustment module 220.
Wherein, the picture brightness obtains the picture brightness that module 210 is used to obtain played image.In the present embodiment
In, the description as described in the picture brightness obtains module 210 specifically refers to the detailed description to step S101 shown in Fig. 2,
It is executed that is, the step S101 can obtain module 210 by the picture brightness.
The backlight illumination adjustment module 220 is used to adjust the backlight illumination of display equipment 100, makes the display equipment
100 backlight illumination variation tendency is consistent with the picture brightness variation tendency of the played image.In the present embodiment, it closes
The detailed description to step S102 shown in Fig. 2 is specifically referred in the description of backlight illumination adjustment module 220,
It is executed that is, the step S102 can adjust module 220 by the backlight illumination.
Optionally, in the present embodiment, the played image includes, before current time node when preset quantity
The image of intermediate node.As shown in figure 8, backlight illumination adjustment module 220 may include weight adjusting submodule 221, it is current
Picture brightness computational submodule 222 and brightness adjustment submodule 223.
Wherein, the weight adjusting submodule 221 is used for the picture of the image according to the preset quantity timing node
Brightness change trend adjusts the picture brightness of the image of each timing node to the shadow of the picture brightness of the image of current time node
Ring weighted value.
In the present embodiment, the description as described in backlight illumination adjustment module 220 is specifically referred to shown in Fig. 3
The detailed description of step S201 executes that is, the step S201 can adjust module 220 by the backlight illumination.
The current picture brightness calculation submodule 222 is used for picture brightness and the adjustment of the image according to each timing node
The picture brightness of the image of current time node is calculated in weighted value afterwards.In the present embodiment, about the current picture
The description of brightness calculation submodule 222 specifically refers to the detailed description to step S202 shown in Fig. 3, that is, the step
S202 can be executed by the current picture brightness calculation submodule 222.
The brightness adjustment submodule 223 is for adjusting backlight illumination to corresponding with calculated picture brightness bright
Angle value, it is described to show the corresponding relationship being stored between different pictures brightness and different brightness values in equipment 100.
In the present embodiment, the description as described in the brightness adjustment submodule 223 is specifically referred to step shown in Fig. 3
The detailed description of rapid S203, that is, the step S203 can be executed by the brightness adjustment submodule 223.
Optionally, as shown in figure 9, the weight adjusting submodule 221 may include mean range computing unit
2211 and weighted value adjustment unit 2212.
Wherein, the mean range computing unit 2211 is for calculating in the preset quantity timing node, and two
Mean range between the picture brightness of the image of two adjacent timing nodes.In the present embodiment, about the average change
The description for changing magnitude computation unit 2211 specifically refers to the detailed description to step S301 shown in Fig. 4, that is, the step
Rapid S301 can be executed by the mean range computing unit 2211.
The weighted value adjustment unit 2212 is used to adjust the image of each timing node according to the mean range
Weighing factor value of the picture brightness to the picture brightness of the image of current time node.In the present embodiment, about the weight
The description of value adjustment unit 2212 specifically refers to the detailed description to step S302 shown in Fig. 4.That is, the step
S302 can be executed by the weighted value adjustment unit 2212.
Optionally, as shown in Figure 10, the weighted value adjustment unit 2212 may include weighting function adjustment subelement 301
And weight calculation subelement 302.
Wherein, the weighting function adjustment subelement 301 is used to adjust default weighting letter according to the mean range
Number.In the present embodiment, the description as described in weighting function adjustment subelement 301 is specifically referred to step shown in Fig. 5
The detailed description of rapid S401 executes that is, the step S401 can adjust subelement 301 by the weighting function.
In the present embodiment, the default weighting function is linear weighting function or nonlinear weight function, the weighting
Function adjustment subelement 301 may include the first adjustment time subelement 3011 and second adjustment time subelement 3012.
Wherein, the first adjustment time subelement 3011 is used to adjust described pre- when the mean range increases
If the coefficient of weighting function, increases the corresponding functional value of the timing node in the first preset range, make in the second preset range
The corresponding functional value of timing node reduce.
The second adjustment time subelement 3012 is used to adjust the default weighting when the mean range reduces
The coefficient of function reduces the corresponding functional value of the timing node in the first preset range, makes the time in the second preset range
Node respective function value increases.
Wherein, the division of first preset range and the second preset range and the type of the default weighting function and it is
Number matches.In the present embodiment, retouching about the first adjustment time subelement 3011 and second adjustment time subelement 3012
The associated description specifically referred in above content is stated, details are not described herein again.
The weight calculation subelement 302 is for segmentum intercalaris when recalculating to obtain each according to default weighting function adjusted
Weighing factor value of the picture brightness of the image of point to the picture brightness of the image of current time node.In the present embodiment, it closes
The detailed description to step S402 shown in Fig. 5 is specifically referred in the description of the weight calculation subelement 302, that is,
The step S402 can be executed by the weight calculation subelement 302.
In conclusion back light brightness regulating method provided by the invention, device and display equipment 100, it can be according to having broadcast
The picture brightness variation tendency for the image put is adjusted backlight illumination, the figure that makes the variation tendency of backlight illumination and played
The picture brightness variation tendency of picture is consistent, to reach better viewing effect.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of back light brightness regulating method characterized by comprising
The picture brightness of the played image of display equipment is obtained, the played image is pre- before including current time node
If the image of quantity timing node；
It calculates in the preset quantity timing node, two-by-two the average change between the picture brightness of the image of adjacent time node
Change amplitude；
The picture brightness of the image of each timing node is adjusted to the image of current time node according to the mean range
The weighing factor value of picture brightness；
According to the picture brightness of the image of each timing node and weighted value adjusted, the image of current time node is calculated
Picture brightness；
Backlight illumination is adjusted to brightness value corresponding with calculated picture brightness, wherein stored in the display equipment
There is the corresponding relationship between different pictures brightness and different brightness values.
2. back light brightness regulating method according to claim 1, which is characterized in that adjusted according to the mean range
The step of picture brightness of the image of each timing node is to the weighing factor value of the picture brightness of the image of current time node, packet
It includes:
Default weighting function is adjusted according to the mean range；
Recalculate to obtain the picture brightness of the image of each timing node to current time according to default weighting function adjusted
The weighing factor value of the picture brightness of the image of node.
3. back light brightness regulating method according to claim 1 or 2, which is characterized in that the sum of each described weighing factor value
Equal to the preset quantity.
4. back light brightness regulating method according to claim 2, which is characterized in that the default weighting function is linear adds
Weight function or nonlinear weight function adjust the step of presetting weighting function according to the mean range, comprising:
When the mean range increases, adjust the coefficient of the default weighting function, make in the first preset range when
The corresponding functional value of intermediate node increases, and reduces the corresponding functional value of the timing node in the second preset range；
When the mean range reduces, adjust the coefficient of the default weighting function, make in the first preset range when
The corresponding functional value of intermediate node reduces, and increases the corresponding functional value of the timing node in the second preset range；
The division of first preset range and the second preset range and the type and coefficient of the default weighting function match.
5. a kind of backlight illumination regulating device characterized by comprising
Picture brightness obtains module, for obtaining the picture brightness of the played image of display equipment, the played image
Image including preset quantity timing node before current time node；And
Backlight illumination adjusts module, and backlight illumination adjustment module includes:
Mean range computing unit, for calculating in the preset quantity timing node, adjacent time node two-by-two
Mean range between the picture brightness of image；
Weighted value adjustment unit, for adjusted according to the mean range each timing node image picture brightness to working as
The weighing factor value of the picture brightness of the image of preceding timing node；
Current picture brightness calculation submodule, for according to the image of each timing node picture brightness and weight adjusted
Value, is calculated the picture brightness of the image of current time node；
Brightness adjustment submodule, it is described for adjusting backlight illumination to brightness value corresponding with calculated picture brightness
The corresponding relationship being stored in display equipment between different pictures brightness and different brightness values.
6. backlight illumination regulating device according to claim 5, which is characterized in that the weighted value adjustment unit includes:
Weighting function adjusts subelement, for adjusting default weighting function according to the mean range；
Weight calculation subelement, for recalculating to obtain the image of each timing node according to default weighting function adjusted
Weighing factor value of the picture brightness to the picture brightness of the image of current time node.
7. backlight illumination regulating device according to claim 5 or 6, which is characterized in that the sum of described each weighing factor value
Equal to the preset quantity.
8. backlight illumination regulating device according to claim 6, which is characterized in that the default weighting function is linear adds
Weight function or nonlinear weight function, the weighting function adjustment subelement include:
The first adjustment time subelement, for adjusting the coefficient of the default weighting function when the mean range increases,
Increase the corresponding functional value of the timing node in the first preset range, makes the corresponding letter of timing node in the second preset range
Numerical value reduces, the division and the type and coefficient phase of the default weighting function of first preset range and the second preset range
Matching；
Second adjustment time subelement, for adjusting the coefficient of the default weighting function when the mean range reduces,
Reduce the corresponding functional value of the timing node in the first preset range, makes the corresponding letter of timing node in the second preset range
Numerical value increases；
The division of first preset range and the second preset range and the type and coefficient of the default weighting function match.
9. a kind of display equipment, which is characterized in that the display equipment includes that backlight described in any one of claim 5-8 is bright
Spend regulating device.
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| JP2002357810A (en) * | 2001-05-31 | 2002-12-13 | Matsushita Electric Ind Co Ltd | Video display device and its method |
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| EP1111578A4 (en) * | 1999-05-10 | 2008-04-09 | Matsushita Electric Ind Co Ltd | Image display device and image display method |
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