CN108806616A - Method for controlling backlight thereof, device and computer readable storage medium - Google Patents
Method for controlling backlight thereof, device and computer readable storage medium Download PDFInfo
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- CN108806616A CN108806616A CN201810543716.4A CN201810543716A CN108806616A CN 108806616 A CN108806616 A CN 108806616A CN 201810543716 A CN201810543716 A CN 201810543716A CN 108806616 A CN108806616 A CN 108806616A
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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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- 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
- G09G3/36—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 using liquid crystals
- G09G3/3607—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 using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
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Abstract
The invention discloses a kind of method for controlling backlight thereof, include the following steps：Obtain the maximum gradation value of each region and the ambient brightness value of current environment in current video image；Obtain the average gray value of each region；Determine the maximum gradation value, the average gray value and the ambient brightness value weighted value, and calculate the first weighted average of maximum gradation value, average gray value and ambient brightness value；The backlight adjusted value of described each region is determined based on first weighted average；The backlight adjusted value is sent to backlight control circuit, to adjust the backlight value of each region.The invention also discloses a kind of backlight control apparatus and computer readable storage mediums.The present invention realizes the first weighted average of the maximum gradation value for calculating each region, average gray value and ambient brightness value so that it is determined that backlight adjusted value, the backlight crosstalk of close region and the influence of ambient light, enhance the effect of backlight illumination adjustment when reducing backlight adjustment.
Description
Technical field
The present invention relates to liquid crystal display technical field more particularly to method for controlling backlight thereof, device and computer-readable deposit
Storage media.
Background technology
Nowadays, liquid crystal display is since, weight relatively low with power consumption is relatively lighter, thickness compares than relatively thin, color displays
The reasons such as gorgeous, it has also become the mainstream technology of FPD is widely used in our daily consumed electronics production
In product, such as laptop, mobile phone, GPS, domestic TV etc..Since liquid crystal display itself oneself can't shine,
So it needs to dispose a kind of backlight behind porjection type liquid crystal display panel, then through LED liquid crystal cells through the general of light
Rate carrys out the effect of modulating video image, to reach the image for thinking dynamic scene to be shown.Currently, the light-emitting diodes of liquid crystal display
Pipe backlight, because it has many advantages, such as that low power consumption, long lifespan, environmental protection, controllability are strong, gradually instead of traditional cold light
How cathode tube backlight overcomes and improves the intrinsic disadvantage of liquid crystal display to ensure the quality of picture.
Currently, in the prior art the method for controlling backlight thereof of liquid crystal display by maximum value-based algorithm, average algorithm, square
Root algorithm determines that backlight degree, the backlight illumination of close region can cause backlight crosstalk phenomenon, ambient brightness that will also influence backlight
The adjustment of brightness causes the effect that backlight illumination adjusts poor.
The above is only used to facilitate the understanding of the technical scheme, and is not represented and is recognized that the above is existing skill
Art.
Invention content
The main purpose of the present invention is to provide a kind of method for controlling backlight thereof, it is intended to which solution is closed on when backlight illumination adjusts
The backlight illumination in region can cause backlight crosstalk phenomenon, ambient brightness that will also influence the adjustment of backlight illumination, cause backlight bright
Spend the technical problem of the effect difference of adjustment.
To achieve the above object, the present invention provides a kind of method for controlling backlight thereof, and the method for controlling backlight thereof includes：
Obtain the maximum gradation value of each region and the ambient brightness value of current environment in current video image；
Obtain the average gray value in each region；
Determine the maximum gradation value, the average gray value and the ambient brightness value weighted value, and calculate described in
First weighted average of maximum gradation value, the average gray value and the ambient brightness value；
The backlight adjusted value of described each region is determined based on first weighted average；
The backlight adjusted value is sent to backlight control circuit, to adjust the backlight value of each region.
Preferably, described the step of obtaining the maximum gradation value of each region in current video image, includes：
Obtain the pixel of each region in current video image；
The maximum rgb value of the pixel is obtained, and using the maximum rgb value as the maximum gradation value.
Preferably, the step of average gray value for obtaining each region includes：
Obtain the gray value in each region；
The average gray value in each region is calculated using average algorithm.
Preferably, the backlight brightness control method further includes：
The pixel value of the pixel is obtained, and based on the brightness value in each region of the calculated for pixel values；
Darkness region and luminance area are determined based on the brightness value；
Determine whether the brightness value of the luminance area is more than the first predetermined threshold value, if the brightness value of the luminance area is big
In the first predetermined threshold value, then adjusted without backlight.
Preferably, the step of backlight adjusted value that described each region is determined based on the first weighted average it
Afterwards, the method for controlling backlight thereof further includes：
The first backlight value after being adjusted based on the backlight adjustment calculation；
The information content of image information in current video signal is obtained, and backlight gain coefficient is determined based on described information amount；
The second backlight value after gain is calculated based on first backlight value and backlight gain coefficient.
Preferably, the method for controlling backlight thereof further includes：
The second weighted average of the maximum gradation value and the average gray value is calculated, and is weighted based on described second
Third backlight value after mean value calculation adjustment；
Obtain corresponding 4th backlight value of the ambient brightness value, and by the third backlight value and the 4th backlight value
It is compared；
If the difference of the third backlight value and the 4th backlight value within a preset range, is weighted based on described second
Mean value calculation backlight adjusted value.
Preferably, after described the step of being compared the third backlight value with the 4th backlight value, the back of the body
Light control method further includes：
If the difference of the third backlight value and the 4th backlight value not in the preset range, increases or reduces the back of the body
Brightness.
Preferably, described the step of increasing or reducing backlight illumination, includes：
Control load resistance value increases or reduces, and so that the load is prevented consistent with the load resistance value calculated, to control the back of the body
Brightness increases or reduces.
In addition, to achieve the above object, the present invention also provides a kind of backlight control apparatus, the backlight control apparatus packet
It includes：Memory, processor and it is stored in the backlight control program that can be run on the memory and on the processor, it is described
The step of backlight control program realizes method for controlling backlight thereof as described above when being executed by the processor.
In addition, to achieve the above object, it is described computer-readable the present invention also provides a kind of computer readable storage medium
Backlight control program is stored on storage medium, the backlight control program realizes backlight as described above when being executed by processor
The step of control method.
A kind of method for controlling backlight thereof of present invention offer, device computer readable storage medium storing program for executing, pass through and obtain current video figure
The maximum gradation value of each region and the ambient brightness value of current environment as in, then obtain the average gray in each region
Value, then determine the maximum gradation value, the average gray value and the ambient brightness value weighted value, and calculate described in most
First weighted average of high-gray level value, the average gray value and the ambient brightness value adds followed by based on described first
Weight average value determines the backlight adjusted value of described each region, and the backlight adjusted value is finally sent to backlight control circuit,
To adjust the backlight value of each region.It is thus achieved that the calculating to backlight value carries out backlight compensation to image, and to liquid crystal
The liquid crystal cells lattice of display screen are adjusted, and to improve contrast, and are reduced image well, be ensure that image
The distortion factor, and the algorithm is simple；Realize the maximum gradation value for calculating each region, average gray value and ambient brightness value
First weighted average is so that it is determined that backlight adjusted value, the backlight crosstalk of close region and environment when thereby reducing backlight adjustment
The influence of light enhances the effect of backlight illumination adjustment.
Description of the drawings
Fig. 1 is that the structure of the affiliated terminal of backlight control apparatus in the hardware running environment that the embodiment of the present invention is related to is shown
It is intended to；
Fig. 2 is the flow diagram of method for controlling backlight thereof first embodiment of the present invention；
Fig. 3 is the refinement stream that the maximum gradation value of each region in current video image is obtained described in the embodiment of the present invention
Journey schematic diagram；
Fig. 4 is the refinement flow diagram for the average gray value that each region is obtained described in the embodiment of the present invention；
Fig. 5 is the flow diagram of method for controlling backlight thereof second embodiment of the present invention；
Fig. 6 is the flow diagram of method for controlling backlight thereof 3rd embodiment of the present invention；
Fig. 7 is the flow diagram of method for controlling backlight thereof fourth embodiment of the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific implementation mode
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
As shown in Figure 1, in the hardware running environment that Fig. 1, which is the embodiment of the present invention, to be related to the affiliated terminal of device structure
Schematic diagram.
Terminal of the embodiment of the present invention can be PC.As shown in Figure 1, the terminal may include：Processor 1001, such as CPU,
Network interface 1004, user interface 1003, memory 1005, communication bus 1002.Wherein, communication bus 1002 is for realizing this
Connection communication between a little components.User interface 1003 may include display screen (Display), input unit such as keyboard
(Keyboard), optional user interface 1003 can also include standard wireline interface and wireless interface.Network interface 1004 is optional
May include standard wireline interface and wireless interface (such as WI-FI interfaces).Memory 1005 can be high-speed RAM memory,
Can also be stable memory (non-volatile memory), such as magnetic disk storage.Memory 1005 optionally may be used also
To be independently of the storage device of aforementioned processor 1001.
Optionally, terminal can also include camera, RF (Radio Frequency, radio frequency) circuit, sensor, audio
Circuit, WiFi module etc..Wherein, sensor such as optical sensor, motion sensor and other sensors.Specifically, light
Sensor may include ambient light sensor and proximity sensor, wherein ambient light sensor can according to the light and shade of ambient light come
The brightness of display screen is adjusted, proximity sensor can close display screen and/or backlight when mobile terminal is moved in one's ear.As
One kind of motion sensor, gravity accelerometer can detect on direction the size of (generally three axis) acceleration, when static
Size and the direction that can detect that gravity can be used to identify application (such as horizontal/vertical screen switching, the related trip of mobile terminal posture
Play, magnetometer pose calibrating), Vibration identification correlation function (such as pedometer, tap) etc.；Certainly, mobile terminal can also configure
The other sensors such as gyroscope, barometer, hygrometer, thermometer, infrared sensor, details are not described herein.
It will be understood by those skilled in the art that the restriction of the not structure paired terminal of terminal structure shown in Fig. 1, can wrap
It includes than illustrating more or fewer components, either combines certain components or different components arrangement.
As shown in Figure 1, as may include operation server, network in a kind of memory 1005 of computer storage media
Communication module, Subscriber Interface Module SIM and program.
In terminal shown in Fig. 1, network interface 1004 is mainly used for connecting background server, is carried out with background server
Data communicate；User interface 1003 is mainly used for connecting client (user terminal), with client into row data communication；And processor
1001 can be used for calling the program stored in memory 1005.
In the present embodiment, device includes：It memory 1005, processor 1001 and is stored on the memory 1005 simultaneously
The program that can be run on the processor 1001, wherein when processor 1001 calls the program stored in memory 1005, hold
The following operation of row：
Obtain the maximum gradation value of each region and the ambient brightness value of current environment in current video image；
Obtain the average gray value in each region；
Determine the maximum gradation value, the average gray value and the ambient brightness value weighted value, and calculate described in
First weighted average of maximum gradation value, the average gray value and the ambient brightness value；
The backlight adjusted value of described each region is determined based on first weighted average；
The backlight adjusted value is sent to backlight control circuit, to adjust the backlight value of each region.
Further, processor 1001 can call the backlight control program stored in memory 1005, also execute following
Operation：
Obtain the pixel of each region in current video image；
The maximum rgb value of the pixel is obtained, and using the maximum rgb value as the maximum gradation value.
Further, processor 1001 can call the backlight control program stored in memory 1005, also execute following
Operation：
Obtain the gray value in each region；
The average gray value in each region is calculated using average algorithm.
Further, processor 1001 can call the backlight control program stored in memory 1005, also execute following
Operation：
The pixel value of the pixel is obtained, and based on the brightness value in each region of the calculated for pixel values；
Darkness region and luminance area are determined based on the brightness value；
Determine whether the brightness value of the luminance area is more than the first predetermined threshold value, if the brightness value of the luminance area is big
In the first predetermined threshold value, then adjusted without backlight.
Further, processor 1001 can call the backlight control program stored in memory 1005, also execute following
Operation：
The first backlight value after being adjusted based on the backlight adjustment calculation；
The information content of image information in current video signal is obtained, and backlight gain coefficient is determined based on described information amount；
The second backlight value after gain is calculated based on first backlight value and backlight gain coefficient.
Further, processor 1001 can call the backlight control program stored in memory 1005, also execute following
Operation：
The second weighted average of the maximum gradation value and the average gray value is calculated, and is weighted based on described second
Third backlight value after mean value calculation adjustment；
Obtain corresponding 4th backlight value of the ambient brightness value, and by the third backlight value and the 4th backlight value
It is compared；
If the difference of the third backlight value and the 4th backlight value within a preset range, is weighted based on described second
Mean value calculation backlight adjusted value.
Further, processor 1001 can call the backlight control program stored in memory 1005, also execute following
Operation：
If the difference of the third backlight value and the 4th backlight value not in the preset range, increases or reduces the back of the body
Brightness.
Further, processor 1001 can call the backlight control program stored in memory 1005, also execute following
Operation：
Control load resistance value increases or reduces, and so that the load is prevented consistent with the load resistance value calculated, to control the back of the body
Brightness increases or reduces.
The present invention further provides a kind of method for controlling backlight thereof.It is method for controlling backlight thereof first of the present invention with reference to Fig. 2, Fig. 2
The flow diagram of embodiment.
In the present embodiment, which includes：
Step S10 obtains the maximum gradation value of each region and the ambient brightness value of current environment in current video image；
In the present embodiment, technical staff is divided into multiple regions according to actual demand to video image, to each area
When domain carries out backlight adjustment, the backlight illumination of close region will generate backlight crosstalk, and the brightness of ambient light also can be to backlight
Certain interference is played in adjustment, so, the present invention determines backlight tune by calculating each region maximum gradation value and ambient brightness value
Whole value, to reduce the crosstalk of close region backlight and the interference of ambient brightness.
Further, first obtain current video image in each region maximum gradation value, be referring in particular to Fig. 3, Fig. 3
Obtain the refinement flow diagram of the maximum gradation value of each region in current video image.Step S10 includes：
Step S11 obtains the pixel of each region in current video image；
Step S12 obtains the maximum rgb value of the pixel, and using the maximum rgb value as the maximum gray scale
Value.
The maximum gradation value refers to the maximum rgb value of the pixel of each region in video image, utilizes maximum value-based algorithm
Maximum gradation value is calculated, specifically, obtains the pixel of each region in current video image first, and obtain each pixel
Maximum rgb value, and using the maximum rgb value as maximum gradation value.
Further, the ambient brightness value of current environment is obtained, ambient brightness value is passed through photosensitive by ambient light sampling apparatus
Circuit obtains the intensity value of the ambient light of current sampling point, which can be sensitive chip, can also be by discrete member
The photosensitive circuit etc. of part composition.Ambient light sampling apparatus can acquire the brightness value of multiple ambient light, and record times of collection and
Each collected ambient brightness value then calculates collected environment in preset times when times of collection reaches preset times
The average value of brightness value, using the average value as the ambient brightness value of current environment.Alternatively, by sampling, if continuous multiple
The sampled value of number is equal or within the scope of a very little, i.e., ambient light intensity is stable at some value, then environment at this time
Light intensity value is just the environmental light intensity angle value of stabilization, for example, the brightness of the ambient light of Environment features device acquisition current sampling point
Then value acquires the brightness value of the ambient light of next sampled point, determine whether the brightness value of ambient light collected twice is equal,
If the brightness value of collected ambient light is equal twice, equal times are recorded, when the number reaches preset number, then will
Ambient brightness value of the brightness value as current environment continues to repeat if the brightness of collected ambient light is unequal twice
Above-mentioned sampling operation.
Further include after step S10：
Step S20 obtains the average gray value in each region；
In the present embodiment, average gray value is the average value of gray value in each region, is calculated using average algorithm
The average gray value of each region, specifically please refers to Fig. 4, and Fig. 4 is the thin of the average gray value for obtaining each region
Change flow diagram；Step S20 includes：
Step S21 obtains the gray value in each region；
Step S22 calculates the average gray value in each region using average algorithm.
In the present embodiment, each region is calculated using floating-point arithmetic, integer method, displacement method or average algorithm
Gray value calculates the average gray value of each region using average algorithm, for example, calculating all pixels point corresponding grey scale first
The sum of value, then obtains average gray value with the sum of the gray value divided by pixel number.
Further include after step S20：
Step S30, determine the maximum gradation value, the average gray value and the ambient brightness value weighted value, and
Calculate the first weighted average of the maximum gradation value, the average gray value and the ambient brightness value；
In the present embodiment, the maximum rgb value in all pixels point is calculated using maximum value-based algorithm, and by maximum RGB
It is worth the gray value as the pixel, and average gray value is calculated using average algorithm, specifically, calculates all pixels first
The sum of point corresponding grey scale value, then obtains average gray value with the sum of the gray value divided by pixel number.Determine maximum ash
The weighted value of angle value, average gray value and ambient brightness value calculates the maximum gradation value, average gray by Weighted Average Algorithm
First weighted average of value and ambient brightness value, the weighted value are set by technical staff according to experiment and experience, for example,
The weighted value of maximum gradation value is a, maximum gradation value A, average gray value B, and the weighted value of average gray value is b, environment
Brightness value is C, and the average value of ambient brightness value is c, then the first weighted average being calculated is Aa+Bb+Cc.Wherein, should
Weighted value is configured by technical staff according to experiment and actual conditions.
Step S40 determines the backlight adjusted value of described each region based on first weighted average；
The backlight adjusted value is sent to backlight control circuit, to adjust the backlight value of each region by step S50.
In the present embodiment, the first weighted average is determined by the adjustment curve or adjustment table of technical staff's setting
It is worth corresponding backlight adjusted value, wherein the first weighted average is corresponding with backlight adjusted value in adjustment curve, the in adjustment table
One weighted average corresponds to some backlight adjusted value in some preset range, is added according to adjustment curve or adjustment table lookup first
The corresponding backlight modulation value of weight average value.For example, when the first weighted average is in a-b ranges, then first weighted average
Corresponding backlight adjusted value is A, when the first weighted average is in c-d ranges, then the corresponding backlight of the first weighted average
Adjusted value is B.
Further, the backlight adjusted value found is sent to backlight control circuit, by according to the backlight found out
Adjusted value, calculates the driving current in LED backlight module in display device, and LED backlight module is calculated according to the driving current
The resistance value of middle load resistance；The resistance value for adjusting presently described load resistance makes the resistance value of itself and calculated LED load resistance protect
It holds consistent.
The method for controlling backlight thereof that the present embodiment proposes, by the maximum gradation value for obtaining each region in current video image
And the ambient brightness value of current environment, the average gray value in each region is then obtained, then determines the maximum gray scale
The weighted value of value, the average gray value and the ambient brightness value, and calculate the maximum gradation value, the average gray value
And the first weighted average of the ambient brightness value, determine described each region followed by based on first weighted average
Backlight adjusted value, the backlight adjusted value is finally sent to backlight control circuit, to adjust the backlight value of each region；It is real
The first weighted average of the maximum gradation value for calculating each region, average gray value and ambient brightness value is showed so that it is determined that the back of the body
Light adjusted value, the backlight crosstalk of close region and the influence of ambient light, enhance backlight illumination when thereby reducing backlight adjustment
The effect of adjustment.
Based on first embodiment, the second embodiment of the method for controlling backlight thereof of the present invention is proposed, with reference to Fig. 5, the present embodiment
In, which further includes：
Step S60 obtains the pixel value of the pixel, and based on the brightness in each region of the calculated for pixel values
Value；
In the present embodiment, the pixel value for obtaining the pixel in current video image each region, according to pixel value meter
The brightness value of each region in nomogram picture, analyzes the image in each region, the pixel in image is analyzed, according to each
The pixel value of a pixel calculates the brightness value of image, according to pixel in brightness value and the area or image of each region
The average brightness value that number calculates, using the average brightness value as the brightness value of each region.
Step S70 determines darkness region and luminance area based on the brightness value；
Step S80, determines whether the brightness value of the luminance area is more than the first predetermined threshold value, if the luminance area
Brightness value is more than the first predetermined threshold value, then is adjusted without backlight.
In the present embodiment, the brightness value of each region is judged, if the brightness value whether be more than a certain threshold value or
When person is in a certain threshold range, then the corresponding region of the brightness value be luminance area, if the brightness value be less than a certain threshold value or
When person is in another threshold range, then the corresponding region of the brightness value is darkness region.Further, if the corresponding area of the brightness value
Domain is luminance area, it is determined that whether the brightness value is more than the first predetermined threshold value, if the brightness value is more than predetermined threshold value, no
Carry out backlight adjustment.
The method for controlling backlight thereof that the present embodiment proposes by obtaining the pixel value of the pixel, and is based on the pixel
Value calculates the brightness value in each region, is then based on the brightness value and determines darkness region and luminance area, finally determines
Whether the brightness value of the luminance area is more than the first predetermined threshold value, if the brightness value of the luminance area is more than the first default threshold
Value is then adjusted without backlight；It realizes and the region is not adjusted without backlight when regional luminance is larger, to avoid excessive
Backlight adjusts.
Based on first embodiment, the 3rd embodiment of the method for controlling backlight thereof of the present invention is proposed, with reference to Fig. 6, the present embodiment
In, after step S40, further include：
Step S90, the first backlight value after being adjusted based on the backlight adjustment calculation；
Step S100, obtains the information content of image information in current video signal, and determines backlight based on described information amount
Gain coefficient；
Step S110 calculates the second backlight value after gain based on first backlight value and backlight gain coefficient.
In the present embodiment, the backlight adjusted value of each region is determined using weighted average value-based algorithm, and according to backlight tune
Whole value calculates the first backlight value after adjustment, and obtains image information in current video signal, and to scheming in current video signal
As the information content of information is counted, the corresponding backlight gain system of table search information content is searched according to preset backlight gain number
Number, to calculate the second backlight backlight value after the first backlight value gain according to backlight gain coefficient, for example, the first backlight value is
A, the backlight gain coefficient that current information amount is found according to backlight gain coefficient table is k, then calculates the second backlight after gain
Value is k × a.The backlight gain coefficient table is built by technical staff, wherein information content can correspond to different backlight gains
Coefficient.The backlight value of vision signal is handled according to the backlight gain system of acquisition, obtains the back of the body for being appropriate to correspondence image
Light value can increase the brightness between the image gray-scale level to contain much information so as to carry out backlight enhancing to the image to contain much information
Difference, so as to effectively promote stereovision, the contrast of display picture.
The method for controlling backlight thereof that the present embodiment proposes passes through the first backlight after being adjusted based on the backlight adjustment calculation
Value, then obtains the information content of image information in current video signal, and determines backlight gain coefficient based on described information amount, most
The second backlight value after gain is calculated based on first backlight value and backlight gain coefficient afterwards；It realizes and forward sight is worked as by basis
The information content of image information determines corresponding backlight gain coefficient in frequency signal, so as to be carried on the back to the image to contain much information
Light enhances, and then the effective stereovision and contrast for improving display picture.
Based on first embodiment, the fourth embodiment of the method for controlling backlight thereof of the present invention is proposed, with reference to Fig. 7, the present embodiment
In, which further includes：
Step S120 calculates the second weighted average of the maximum gradation value and the average gray value, and is based on institute
It states the second weighted average and calculates the third backlight value after adjustment；
Step S130, obtains corresponding 4th backlight value of the ambient brightness value, and by the third backlight value with it is described
4th backlight value is compared；
Step S140 is based on institute if the difference of the third backlight value and the 4th backlight value is within a preset range
It states the second weighted average and calculates backlight adjusted value.
Step S150, if the difference of the third backlight value and the 4th backlight value not in the preset range, increases
Big or reduction backlight illumination.
In this embodiment, the maximum rgb value in all pixels point is calculated using maximum value-based algorithm, and by the maximum rgb value
, will be using the maximum rgb value as maximum gradation value as the gray value of the pixel, and calculate average ash using average algorithm
Angle value calculates the maximum gradation value and the second weighted average of the average gray value, and in preset adjustment curve or tune
The corresponding backlight adjusted value of the second weighted average is searched in whole table, and according to backlight adjustment calculation third backlight value, and
And corresponding 4th backlight value of ambient brightness is determined according to current environment brightness, and third backlight value and the 4th backlight value are carried out
Compare, calculate the difference of third backlight value and the 4th backlight value, and determine third backlight value and the 4th backlight value difference whether
Within a preset range, if the difference of third backlight value and the 4th backlight value within a preset range, according to be adjusted curve or
The backlight adjusted value found in adjustment table carries out backlight adjustment.If the difference of third backlight value and the 4th backlight value is more than pre-
If range, then increase or reduce backlight illumination.
Specifically, the step 150 for increasing or reducing backlight illumination includes：
Step S151, control load resistance value increase or reduce, and so that the load is prevented consistent with the load resistance value calculated,
It is increased or reduced with what is controlled the backlight brightness.
In the present embodiment, according to the backlight value found out, the resistance value of load resistance in LED backlight module, control are calculated
The increase or reduction of the resistance value of present load resistance make the resistance value of itself and calculated LED load resistance be consistent, according to
The resistance value of presently described load resistance is adjusted in predetermined adjustment amount, and to LED backlight module in the display device after adjusting
In driving current calculated, the difference of backlight value and the backlight value found out corresponding to it is not in predetermined threshold range
When interior, then repeat the operation adjusted to the resistance value of presently described load resistance, it is right in middle display circuit according to the display device
The relevant information of the LED of product is answered, which includes：LED specifications and quantity, diaphragm framework to the gain coefficient of brightness,
By the brightness value for needing to adjust and calculated backlight value, and liquid crystal is shifted onto by the way that the specification quantity of gain coefficient and LED is counter
TV corresponding LED drive current under the brightness for needing to adjust brightness value, and then obtain corresponding adjusting current loading resistance
Resistance value.
The method for controlling backlight thereof that the present embodiment proposes, by calculate the maximum gradation value and the average gray value the
Two weighted averages, and the third backlight value after adjustment is calculated based on second weighted average, then obtain the environment
Corresponding 4th backlight value of brightness value, and the third backlight value is compared with the 4th backlight value, if the third
The difference of backlight value and the 4th backlight value within a preset range, is then based on second weighted average and calculates backlight adjustment
Value, if not in the preset range, it is bright to increase or reduce backlight for the difference of the third backlight value and the 4th backlight value
Degree；Realize by calculating to the second weighted average backlight value corresponding with ambient brightness be compared, so that it is determined that closing
Suitable backlight adjusted value reduces because backlight of display device brightness is too strong or too secretly to injury caused by user's eyes.
In addition, the embodiment of the present invention also proposes a kind of computer readable storage medium.Computer-readable storage medium of the present invention
Backlight control program is stored in matter, the backlight control program realizes following steps when being executed by processor：
Obtain the maximum gradation value of each region and the ambient brightness value of current environment in current video image；
Obtain the average gray value in each region；
Determine the maximum gradation value, the average gray value and the ambient brightness value weighted value, and calculate described in
First weighted average of maximum gradation value, the average gray value and the ambient brightness value；
The backlight adjusted value of described each region is determined based on first weighted average；
The backlight adjusted value is sent to backlight control circuit, to adjust the backlight value of each region.
Further, when which is executed by the processor, following steps are also realized：
Obtain the pixel of each region in current video image；
The maximum rgb value of the pixel is obtained, and using the maximum rgb value as the maximum gradation value.
Further, when which is executed by the processor, following steps are also realized：
Obtain the gray value in each region；
The average gray value in each region is calculated using average algorithm.
Further, when which is executed by the processor, following steps are also realized：
The pixel value of the pixel is obtained, and based on the brightness value in each region of the calculated for pixel values；
Darkness region and luminance area are determined based on the brightness value；
Determine whether the brightness value of the luminance area is more than the first predetermined threshold value, if the brightness value of the luminance area is big
In the first predetermined threshold value, then adjusted without backlight.
Further, when which is executed by the processor, following steps are also realized：
The first backlight value after being adjusted based on the backlight adjustment calculation；
The information content of image information in current video signal is obtained, and backlight gain coefficient is determined based on described information amount；
The second backlight value after gain is calculated based on first backlight value and backlight gain coefficient.
Further, when which is executed by the processor, following steps are also realized：
The second weighted average of the maximum gradation value and the average gray value is calculated, and is weighted based on described second
Third backlight value after mean value calculation adjustment；
Obtain corresponding 4th backlight value of the ambient brightness value, and by the third backlight value and the 4th backlight value
It is compared；
If the difference of the third backlight value and the 4th backlight value within a preset range, is weighted based on described second
Mean value calculation backlight adjusted value.
Further, when which is executed by the processor, following steps are also realized：
If the difference of the third backlight value and the 4th backlight value not in the preset range, increases or reduces the back of the body
Brightness.
Further, when which is executed by the processor, following steps are also realized：
Control load resistance value increases or reduces, and so that the load is prevented consistent with the load resistance value calculated, to control the back of the body
Brightness increases or reduces.
It should be noted that herein, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that process, method, article or system including a series of elements include not only those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or system institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including this
There is also other identical elements in the process of element, method, article or system.
The embodiments of the present invention are for illustration only, can not represent the quality of embodiment.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can add the mode of required general hardware platform to realize by software, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical scheme of the present invention substantially in other words does the prior art
Going out the part of contribution can be expressed in the form of software products, which is stored in one as described above
In storage medium (such as ROM/RAM, magnetic disc, CD), including some instructions use so that a station terminal equipment (can be mobile phone,
Computer, server, air conditioner or network equipment etc.) execute method described in each embodiment of the present invention.
It these are only the preferred embodiment of the present invention, be not intended to limit the scope of the invention, it is every to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of method for controlling backlight thereof, which is characterized in that the method for controlling backlight thereof includes the following steps：
Obtain the maximum gradation value of each region and the ambient brightness value of current environment in current video image；
Obtain the average gray value in each region；
Determine the maximum gradation value, the average gray value and the ambient brightness value weighted value, and calculate the maximum
First weighted average of gray value, the average gray value and the ambient brightness value；
The backlight adjusted value of described each region is determined based on first weighted average；
The backlight adjusted value is sent to backlight control circuit, to adjust the backlight value of each region.
2. method for controlling backlight thereof as described in claim 1, which is characterized in that each region in the acquisition current video image
Maximum gradation value the step of include：
Obtain the pixel of each region in current video image；
The maximum rgb value of the pixel is obtained, and using the maximum rgb value as the maximum gradation value.
3. method for controlling backlight thereof as described in claim 1, which is characterized in that the average gray for obtaining each region
The step of value includes：
Obtain the gray value in each region；
The average gray value in each region is calculated using average algorithm.
4. method for controlling backlight thereof as claimed in claim 2, which is characterized in that the backlight brightness control method further includes：
The pixel value of the pixel is obtained, and based on the brightness value in each region of the calculated for pixel values；
Darkness region and luminance area are determined based on the brightness value；
Determine whether the brightness value of the luminance area is more than the first predetermined threshold value, if the brightness value of the luminance area is more than the
One predetermined threshold value is then adjusted without backlight.
5. method for controlling backlight thereof as described in claim 1, which is characterized in that described to be determined based on the first weighted average
After the step of backlight adjusted value of described each region, the method for controlling backlight thereof further includes：
The first backlight value after being adjusted based on the backlight adjustment calculation；
The information content of image information in current video signal is obtained, and backlight gain coefficient is determined based on described information amount；
The second backlight value after gain is calculated based on first backlight value and backlight gain coefficient.
6. method for controlling backlight thereof as described in claim 1, which is characterized in that the method for controlling backlight thereof further includes：
The second weighted average of the maximum gradation value and the average gray value is calculated, and is based on second weighted average
Value calculates the third backlight value after adjustment；
Corresponding 4th backlight value of the ambient brightness value is obtained, and the third backlight value and the 4th backlight value are carried out
Compare；
If the difference of the third backlight value and the 4th backlight value is within a preset range, it is based on second weighted average
Value calculates backlight adjusted value.
7. method for controlling backlight thereof as claimed in claim 6, which is characterized in that described by the third backlight value and the described 4th
After the step of backlight value is compared, the method for controlling backlight thereof further includes：
If not in the preset range, it is bright to increase or reduce backlight for the difference of the third backlight value and the 4th backlight value
Degree.
8. method for controlling backlight thereof as claimed in claim 7, which is characterized in that described the step of increasing or reducing backlight illumination wraps
It includes：
Control load resistance value increases or reduces, and so that the load is prevented consistent with the load resistance value calculated, bright to control backlight
Degree increases or reduces.
9. a kind of backlight control apparatus, which is characterized in that the backlight control apparatus includes：It memory, processor and is stored in
On the memory and the backlight control program that can run on the processor, the backlight control program is by the processor
It is realized such as the step of method described in any item of the claim 1 to 8 when execution.
10. a kind of computer readable storage medium, which is characterized in that be stored with backlight control on the computer readable storage medium
Processing procedure sequence realizes such as backlight control described in any item of the claim 1 to 8 when the backlight control program is executed by processor
Method and step.
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| CN201810543716.4A CN108806616A (en) | 2018-05-30 | 2018-05-30 | Method for controlling backlight thereof, device and computer readable storage medium |
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| CN201810543716.4A CN108806616A (en) | 2018-05-30 | 2018-05-30 | Method for controlling backlight thereof, device and computer readable storage medium |
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Family
ID=64089559
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Application publication date: 20181113 |