CN109493812A - Backlight control method, display equipment and storage medium - Google Patents
Backlight control method, display equipment and storage medium Download PDFInfo
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- CN109493812A CN109493812A CN201811640107.7A CN201811640107A CN109493812A CN 109493812 A CN109493812 A CN 109493812A CN 201811640107 A CN201811640107 A CN 201811640107A CN 109493812 A CN109493812 A CN 109493812A
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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
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
- G09G3/3413—Details of control of colour illumination sources
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
- G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
- G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
- G09G3/3426—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines the different display panel areas being distributed in two dimensions, e.g. matrix
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The embodiment of the present application discloses a kind of backlight control method, display equipment and storage medium, by obtaining the initial backlight value of each back light unit, wherein the backlight of display equipment includes M × N number of back light unit；The initial backlight value of each back light unit is compared with the initial backlight value of at least one back light unit in preset range around each back light unit, determines the backlight blast value of each back light unit；According to the backlight blast value of each back light unit, each back light unit is driven.In this way by the way that the initial backlight value of each back light unit to be compared with the initial backlight value of at least one back light unit of surrounding, to adjust the initial backlight value of each back light unit, and then determine the backlight incremental value of each back light unit, and each back light unit is driven to shine based on the backlight incremental value of each back light unit, to realize better image region contrast.
Description
Technical field
The invention relates to display screen technology field more particularly to a kind of backlight control method, display equipment and
Storage medium.
Background technique
With the development of display technology with the promotion of living standard, higher want is proposed to the display effect of display equipment
It asks.In existing display equipment, multi partition dynamic backlight modulation technique control back light source brightness is generallyd use, to promote display pair
Than the image qualities effect such as degree.
Multi partition dynamic backlight modulation technique abbreviation dynamic backlight control, be under the premise of keeping brightness of image, according to
Area image content adjustment back light source brightness to display, and pixel is compensated accordingly, can be effectively saved power consumption,
Improve contrast.According to the difference of intensification modulation dimension, backlight can be divided into 0D (0 dimension) light modulation, 1D (1 dimension) light modulation and 2D (2
Dimension) light-modulating mode.According to the difference of light source position, LED (Light Emitting Diode, light emitting diode) backlight divides again
For straight-down negative and side-light type.Straight-down negative 2D light modulation is to screen into multiple horizontal and vertical subregions, makes each subregion only
Vertical adjustment shading value.
Current multi partition dynamic backlight modulation technique is usually the premise in the constant peak electric current for setting backlight
What the mode of the duty ratio of lower dynamic adjustment PWM (Pulse Width Modulation, pulse width modulation) was realized, i.e. backlight
The maximum brightness in source is consistent with the maximum brightness of white field, is a constant value.But in the backlight control of 2D there may be
Only have the highlighted scene of small area, for this kind of high contrast scene, existing method, so that entirely in whole darker picture
The contrast of picture is unable to satisfy requirement.
Summary of the invention
The embodiment of the present application provides a kind of backlight control method, display equipment and storage medium, to improve pair of picture
Degree of ratio.
In a first aspect, the embodiment of the present application provides a kind of backlight control method, comprising:
Obtaining the initial backlight value of each back light unit, wherein the backlight for showing equipment includes M × N number of back light unit,
Described M, N are the integer greater than 1；
By the initial backlight value of each back light unit, and around each back light unit in preset range extremely
The initial backlight value of a few back light unit is compared, and determines the backlight blast value of each back light unit；
According to the backlight blast value of each back light unit, each back light unit is driven.
In a kind of possible implementation of first aspect, the initial backlight value by each back light unit with
The initial backlight value of at least one back light unit in surrounding's preset range of each back light unit is compared, and is determined every
The backlight blast value of a back light unit, comprising:
It, will be in the initial backlight value of the back light unit and surrounding's preset range of the back light unit for each back light unit
The initial backlight value of at least one back light unit be compared, determine the backlight variation coefficient and/or neighborhood of the back light unit
Difference coefficient；
According to the backlight variation coefficient of the back light unit and/or neighborhood difference coefficient, determine that the backlight of the back light unit increases
Bright values.
In the alternatively possible implementation of first aspect, by the initial backlight value of the back light unit and the backlight list
The initial backlight value of at least one back light unit in surrounding's preset range of member is compared, and determines the backlight of the back light unit
Variation coefficient, comprising:
According to the initial backlight value of each back light unit in the preset range, determine that the preset range is corresponding average
Backlight value；
According to the difference between the initial backlight value of each back light unit in the preset range and the average backlight value
The sum of average value and preset backlight variation coefficient table, determine the backlight variation coefficient of the back light unit.
In the alternatively possible implementation of first aspect, the initial backlight value by the back light unit and the back
The initial backlight value of at least one back light unit in surrounding's preset range of light unit is compared, and determines the back light unit
Neighborhood difference coefficient, comprising:
Determine at least one backlight in the initial backlight value of the back light unit and surrounding's preset range of the back light unit
The difference of the initial backlight value of unit；
According to the maximum difference and preset neighborhood difference coefficient table in the difference, determine that the neighborhood of the back light unit is poor
Value coefficient.
In the alternatively possible implementation of first aspect, the initial backlight value of the determination back light unit with should
The difference of the initial backlight value of at least one back light unit in surrounding's preset range of back light unit, comprising:
Obtain each first back light unit of the distance back light unit pre-determined distance in the preset range；
Determine the difference of the initial backlight value of the back light unit and the initial backlight value of each first back light unit.
It is described to obtain distance backlight list in the preset range in the alternatively possible implementation of first aspect
Each first back light unit of first pre-determined distance, comprising:
Obtain the first backlight of the upper and lower of the distance back light unit pre-determined distance in the preset range, left and right four direction
Unit.
In the alternatively possible implementation of first aspect, the pre-determined distance is equal to the ruler of the preset range
It is very little.
In the alternatively possible implementation of first aspect, the backlight variation coefficient according to the back light unit
And/or neighborhood difference coefficient, determine the backlight blast value of the back light unit, comprising:
According to the backlight variation coefficient of the back light unit and/or neighborhood difference coefficient, to the initial backlight of the back light unit
Value is corrected, and determines the backlight blast value of the back light unit.
In the alternatively possible implementation of first aspect, the backlight variation coefficient according to the back light unit
And/or neighborhood difference coefficient, the initial backlight value of the back light unit is corrected, determines the backlight blast of the back light unit
Value, comprising:
According to the backlight variation coefficient, neighborhood difference coefficient and gain adjustment control amount of the back light unit, to the backlight list
The initial backlight value of member is corrected, and determines the backlight blast value of the back light unit.
In the alternatively possible implementation of first aspect, the initial backlight value for obtaining each back light unit,
Include:
The initial backlight value of each back light unit is obtained from room and time filter, wherein the display equipment packet
Include the room and time filter.
Second aspect, a kind of display equipment of the embodiment of the present application, comprising: the display equipment include: backlight Emboldening module,
Room and time filter, pwm control circuit and backlight, the backlight Emboldening module are filtered with the room and time respectively
Device is connected with the pwm control circuit, and backlight includes M × N number of back light unit, and described M, N are the integer greater than 1；
The room and time filter is used to the initial backlight value of each back light unit being sent to the backlight blast
Module；
The backlight Emboldening module is used for the initial backlight value of each back light unit and each back light unit
Surrounding's preset range in the initial backlight value of back light unit be compared, determine the backlight blast value of each back light unit；
The backlight blast value of each back light unit is sent to the pwm control circuit；
The pwm control circuit is used for the backlight blast value according to each back light unit, determines each back light unit.
In a kind of possible implementation of second aspect, the backlight Emboldening module is specifically used for being directed to each back
Light unit, by least one back light unit in the initial backlight value of the back light unit and surrounding's preset range of the back light unit
Initial backlight value be compared, determine the backlight variation coefficient and/or neighborhood difference coefficient of the back light unit；And according to the back
The backlight variation coefficient and/or neighborhood difference coefficient of light unit, determine the backlight blast value of the back light unit.
In the alternatively possible implementation of second aspect, the backlight Emboldening module is specifically used for according to
The initial backlight value of each back light unit in preset range determines the corresponding average backlight value of the preset range；And according to institute
The average value of the sum of difference between the initial backlight value of each back light unit in preset range and the average backlight value is stated, with
And preset backlight variation coefficient table, determine the backlight variation coefficient of the back light unit.
In the alternatively possible implementation of second aspect, the backlight Emboldening module is specifically used for determining the back
The initial backlight value of at least one back light unit in the initial backlight value of light unit and surrounding's preset range of the back light unit
Difference；According to the maximum difference and preset neighborhood difference coefficient table in the difference, determine that the neighborhood of the back light unit is poor
Value coefficient.
In the alternatively possible implementation of second aspect, the backlight Emboldening module is specifically used for described in acquisition
Each first back light unit of the distance back light unit pre-determined distance in preset range；Determine the initial backlight value of the back light unit with
The difference of the initial backlight value of each first back light unit.
In the alternatively possible implementation of second aspect, the backlight Emboldening module is specifically used for described in acquisition
In preset range the distance back light unit pre-determined distance up and down, the first back light unit of left and right four direction.
In the alternatively possible implementation of second aspect, the pre-determined distance is equal to the ruler of the preset range
It is very little.
In the alternatively possible implementation of second aspect, the backlight Emboldening module is specifically used for according to the back
The backlight variation coefficient and/or neighborhood difference coefficient of light unit, are corrected the initial backlight value of the back light unit, and determining should
The backlight blast value of back light unit.
In the alternatively possible implementation of second aspect, the backlight Emboldening module is specifically used for according to the back
Backlight variation coefficient, neighborhood difference coefficient and the gain adjustment control amount of light unit, to the initial backlight value of the back light unit into
Row correction, determines the backlight blast value of the back light unit.
The third aspect, the embodiment of the present application a kind of electronic equipment, comprising: memory and processor；
The memory, for storing computer program；
Processor, for executing the computer program, to realize such as the described in any item backlight controls of first aspect
Method.
Fourth aspect, a kind of computer storage medium of the embodiment of the present application store computer program in the storage medium,
The computer program realizes such as the described in any item backlight control methods of first aspect when being executed.
5th aspect, a kind of computer program product of the embodiment of the present application, described program product includes computer program, institute
It states computer program to be stored in readable storage medium storing program for executing, shows that at least one processor of equipment can be from the readable storage medium
Matter reads the computer program, at least one described processor executes the computer program and suggestion feedback device is implemented
Such as the backlight control method of first aspect.
Backlight control method, display equipment and storage medium provided by the embodiments of the present application, by obtaining each backlight
The initial backlight value of unit, wherein the backlight of display equipment includes M × N number of back light unit；By each back light unit
The initial backlight value of at least one back light unit around initial backlight value and each back light unit in preset range carries out
Compare, determines the backlight blast value of each back light unit；According to the backlight blast value of each back light unit, each backlight list is driven
Member.In this way by carrying out the initial backlight value of each back light unit and the initial backlight value of at least one back light unit of surrounding
Compare, to adjust the initial backlight value of each back light unit, and then determines the backlight incremental value of each back light unit, and be based on
The backlight incremental value of each back light unit come drive each back light unit shine, to realize better image regional correlation
Degree.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this Shen
Some embodiments please for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the contrast schematic diagram that existing method determines；
Fig. 2 be the invention relates to display equipment structural schematic diagram；
Fig. 3 (a) be the invention relates to display apparatus control system structural schematic diagram；
Fig. 3 (b) be the invention relates to backlight Emboldening module structural schematic diagram；
Fig. 4 is the flow chart of backlight control method provided by the embodiments of the present application；
Fig. 5 (a) be the invention relates to a kind of preset range schematic diagram；
Fig. 5 (b) be the invention relates to another preset range schematic diagram；
Fig. 6 is the flow chart of backlight control method provided by the embodiments of the present application；
Fig. 7 be the invention relates to backlight variation coefficient schematic diagram；
Fig. 8 (a) be the invention relates to the first back light unit a kind of schematic diagram；
Fig. 8 (b) be the invention relates to the first back light unit another schematic diagram；
Fig. 9 be the invention relates to neighborhood difference coefficient schematic diagram；
Figure 10 (a) is the image schematic diagram determined using prior art；
Figure 10 (b) is the image schematic diagram determined using the method for the embodiment of the present application；
Figure 11 is the structural schematic diagram of display equipment provided by the embodiments of the present application；
Figure 12 is the structural schematic diagram of electronic equipment provided by the embodiments of the present application.
Specific embodiment
To keep the purposes, technical schemes and advantages of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application
In attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is
Some embodiments of the present application, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall in the protection scope of this application.
As shown in Figure 1, for only the highlighted scene of small area, existing multi partition dynamic are carried on the back in whole darker picture
Light modulation techniques, although the back light of the corresponding backlight of small area is adjusted to maximum brightness, overall picture seems
Still not bright enough, the contrast so as to cause entire picture is not high enough.
In order to solve the technical problem, technical solution provided by the embodiments of the present application, by under enhancing high contrast scene
The variation range of high brightness backlight can not can enhance the expansion of backlight under the limitation of dynamic change in backlight maximum brightness
Range is dissipated, keeps the high bright part in picture brighter, details becomes apparent from, and realizes better image region contrast.
It is described in detail below with technical solution of the specifically embodiment to the application.These specific implementations below
Example can be combined with each other, and the same or similar concept or process may be repeated no more in some embodiments.
Fig. 2 be the invention relates to display equipment structural schematic diagram, it should be noted that Fig. 2 is that the application is real
A kind of example for the display equipment that example is related to is applied, the display equipment of the embodiment of the present application is not limited to shown in Fig. 2.
As shown in Fig. 2, the display equipment of the embodiment of the present application may include: the liquid crystal display panel 2 for showing video image,
It is placed on the subsequent backlight 1 of liquid crystal display panel 2, for showing the liquid crystal display panel 2 of video image, the luminous PWM of control backlight 1
Control circuit 3 and backlight Emboldening module 14.
Optionally, which further includes the backlight statistical circuit 4 of determining backlight value, video converter 5,6, backlight benefit
Repay circuit 7, liquid crystal control circuit 8, for the room and time filter circuit 9 of filtering, backlight Emboldening module 14, wherein in Fig. 2
11,12 and 13 be connecting line.
Optionally, the backlight 1 of the display equipment is direct-light-type backlight, including M × N number of backlight that can individually control
Unit controls corresponding region on liquid crystal display panel 2 respectively.
The working principle of the display equipment is: firstly, obtaining each video figure to be treated via video converter 6
As data, M × N number of backlight value is obtained subsequently into backlight statistical circuit 4, is conveyed respectively after spatially and temporally filter 9
To backlight Emboldening module 14 and backlight compensation circuit 7, after backlight Emboldening module 14 carries out processing acquisition blast to the backlight value
Backlight value, and the backlight value after blast is inputted into pwm control circuit 3.Pwm control circuit 3 modulates M according to the backlight value after blast
× N number of back light unit, illuminates liquid crystal display panel 2.The thermal compensation signal that liquid crystal control circuit 8 is obtained according to backlight compensation circuit 7 simultaneously
Progress video image on liquid crystal display panel 2 is sent to after compensation video image data to show.
It can be seen from the above, display apparatus control system mainly includes 3 parts as shown in Fig. 3 (a), it is respectively as follows: backlight primary system
Count module, backlight Emboldening module and image compensation module.Wherein, backlight value statistical module include backlight computing module, space and
Termporal filter, image compensation module include liquid crystal control circuit and backlight compensation circuit.Its backlight value statistical module it is specific
Treatment process is, according to the image pixel value inputted point by point, the backlight value for determining one's respective area to be counted in backlight computing module, through sky
Between and termporal filter filtering after be respectively outputted to backlight Emboldening module and image compensation module.Backlight Emboldening module is to each area
The backlight value in domain is input to pwm control circuit after being handled, and carries out the drive control of back light unit, illuminates liquid crystal display panel.Together
When image compensation module be output on liquid crystal display panel after image compensation being shown according to obtained backlight value.
Optionally, as shown in Fig. 3 (b), backlight Emboldening module may include backlight variation coefficient computing unit, field difference
Coefficient calculation unit and backlight blast computing unit, wherein backlight variation coefficient computing unit is used to calculate the back of back light unit
Light variation coefficient, field difference coefficient calculation unit are used to calculate the neighborhood difference coefficient of back light unit, and backlight blast calculates single
Member is for calculating the backlight blast value of back light unit according to backlight variation coefficient and/or neighborhood difference coefficient.
It is described in detail below with reference to the backlight control method that specific embodiment proposes the application.
Fig. 4 is the flow chart of backlight control method provided by the embodiments of the present application.As shown in figure 4, the embodiment of the present application
Method include:
S101, the initial backlight value for obtaining each back light unit, wherein the backlight for showing equipment includes M × N number of backlight
Unit, described M, N are the integer greater than 1.
The executing subject of the embodiment of the present application is above-mentioned display equipment shown in Fig. 2, and optionally, which can be
Show the backlight Emboldening module in equipment.
As shown in Figure 2, display equipment includes backlight, which is divided into M × N number of back light unit.
Optionally, the mode that the initial backlight value of each back light unit is obtained in this step can be user's input.
Optionally, obtained in this step the initial backlight value of each back light unit mode be also possible that from space and when
Between the initial backlight value of each back light unit is obtained at filter.Specifically, display equipment as shown in Figure 2 further includes that video turns
Parallel operation, backlight statistical circuit and room and time filter, video converter handle each video image to be treated
Data, backlight statistic unit obtain the backlight value of each back light unit according to the video image data, which is denoted as back
The initial backlight value of light unit.The initial backlight value after room and time filter, exported respectively to photocontrol module and
Backlight compensation circuit, and then obtain the initial backlight value of each back light unit.
S102, by the initial backlight value of each back light unit, and around each back light unit in preset range
The initial backlight value of at least one back light unit be compared, determine the backlight blast value of each back light unit.
It is identical for the treatment process of each back light unit in M × N number of back light unit in this step, herein with a backlight
It is illustrated for unit, other back light units references.
By taking back light unit 1 as an example, surrounding's preset range of the back light unit 1 is centered on back light unit 1, to spoke around
Penetrate pre-determined distance, the range of acquisition.For example, as shown in Fig. 5 (a) preset range ring_num=1 is with back light unit 1
Center, to one back light unit of external radiation, the preset range of formation is 3 × 3.As shown in Fig. 5 (b), preset range ring_
Num=2, i.e., centered on back light unit 1, to 2 back light units of external radiation, the preset range of formation is 5 × 5.
After the surrounding's preset range for determining the back light unit 1, at least one back light unit in the preset range is obtained
Initial backlight value.Then, the initial backlight value of the back light unit 1 and the initial backlight value of at least one back light unit are compared
Compared with being corrected with the initial backlight value to back light unit 1, determine the backlight blast value of the back light unit 1.
Illustratively, by the first of each back light unit in the initial backlight value of the back light unit 1 and surrounding preset range
Beginning backlight value is compared, judge the initial backlight value of the back light unit 1 and each back light unit of surrounding initial backlight value it
Between difference whether be high contrast situation, to realize the accurate determination to the backlight blast value of the back light unit 1.
Illustratively, by certain several back light unit in the initial backlight value of the back light unit 1 and surrounding preset range
Initial backlight value is compared, and judges the initial back of the initial backlight value of the back light unit 1 and certain several back light unit of surrounding
Whether the difference between light value is high contrast situation, to realize the quick determination to the backlight blast value of the back light unit 1.
Referring to the above method, the backlight blast value of each back light unit in M × N number of back light unit can be determined.
S103, the backlight blast value according to each back light unit, drive each back light unit.
According to above-mentioned steps, realizes to the correction of the initial backlight value of each back light unit, obtain each back light unit
Backlight blast value then drives each back light unit to shine, and then illuminate liquid using the backlight blast value of each back light unit
Crystal panel.
Optionally, referring to shown in Fig. 2, the movement for driving each back light unit luminous can be pwm control circuit realization.
That is backlight Emboldening module determines the backlight blast value of each back light unit according to above-mentioned steps, and by determining each backlight list
The backlight blast value of member is sent to pwm control circuit, and pwm control circuit is according to the backlight blast value of each back light unit, to drive
Each back light unit is moved to shine.
Backlight control method provided by the embodiments of the present application, by obtaining the initial backlight value of each back light unit,
The backlight of middle display equipment includes M × N number of back light unit；It is by the initial backlight value of each back light unit and each described
The initial backlight value of at least one back light unit around back light unit in preset range is compared, and determines each back light unit
Backlight blast value；According to the backlight blast value of each back light unit, each back light unit is driven.In this way by by each backlight
The initial backlight value of unit is compared with the initial backlight value of at least one back light unit of surrounding, to adjust each backlight list
The initial backlight value of member, and then determine the backlight incremental value of each back light unit, and increase based on the backlight of each back light unit
Magnitude come drive each back light unit shine, to realize better image region contrast.
Fig. 6 is the flow chart of backlight control method provided by the embodiments of the present application, on the basis of the above embodiments, this
The detailed process for the backlight blast value of each back light unit of determination that application embodiment is related to, as shown in fig. 6, above-mentioned S102 can be with
Include:
S201, it is directed to each back light unit, will be preset around the initial backlight value of the back light unit and the back light unit
The initial backlight value of back light unit in range is compared, and determines that the backlight variation coefficient of the back light unit and/or neighborhood are poor
Value coefficient.
Each back light unit determines that the process of backlight blast value is identical in the M of the embodiment of the present application × N number of back light unit, this
Application embodiment is by taking a back light unit as an example, the reference of other back light units.
Assuming that by taking back light unit 1 as an example, by surrounding's preset range of the initial value of the back light unit 1 and the back light unit 1
The initial backlight value of at least one interior back light unit is compared, and determines the backlight variation coefficient of the back light unit 1, or
It determines the field difference coefficient of the back light unit 1, or determines backlight variation coefficient and the field difference system of the back light unit 1
Number.
In a kind of example, by surrounding's preset range of the initial backlight value of the back light unit and the back light unit in S201
The initial backlight value of at least one interior back light unit is compared, and determines that the backlight variation coefficient of the back light unit can wrap
It includes: step A and step B.
Step A determines that the preset range is corresponding according to the initial backlight value of each back light unit in the preset range
Average backlight value.
Specifically, the initial backlight value of each back light unit in the corresponding preset range of back light unit 1 is overlapped,
It averages later, using the average value as the corresponding average backlight value of the preset range
It illustrates, it is assumed that shown in preset range such as Fig. 5 (b), ring_num=2 (5X5), the initial back of back light unit 1
Light value is bl (h, w), can determine the corresponding average backlight value bl_avg of the preset range according to the following formula:
Bl_avg=sum { bl (h+i, w+j) }/25, i=-2 ... 2；J=-2..2
Step B, according between the initial backlight value of each back light unit in the preset range and the average backlight value
The sum of difference average value and preset backlight variation coefficient table, determine the backlight variation coefficient of the back light unit.
It should be noted that the backlight value of the embodiment of the present application is pixel value.
The preset backlight variation coefficient table includes the correspondence between different pixel value and different backlight variation coefficients
Relationship.
Specifically, the average backlight value of the corresponding preset range of back light unit 1 is determined according to above-mentioned steps A, it then, will
The initial backlight value of each back light unit in the preset range and the average backlight value carry out doing difference operation, obtain each backlight
The corresponding difference of unit.The corresponding difference value of each back light unit is averaged, which is pixel value.
Then, the corresponding backlight variation coefficient of the average value is inquired in preset backlight variation coefficient table, by the backlight
Backlight variation coefficient of the variation coefficient as back light unit 1.
Optionally, above-mentioned preset backlight variation coefficient is as shown in fig. 7, using the average value of above-mentioned acquisition as abscissa,
It is searched in the Fig. 7 and should and be worth corresponding backlight variation coefficient.
It illustrates, it is assumed that shown in preset range such as Fig. 5 (a), ring_num=2 (5X5), the initial back of back light unit 1
Light value is bl (h, w), can obtain the initial backlight value of each back light unit in preset range according to the following formula and put down with above-mentioned
The average value sum_diff (h, w) of the sum of the absolute value of difference between equal backlight value:
Sum_diff (h, w)=sum { abs (bl (h+i, w+j)-bl_avg) }/25, i=-2 ... 2；J=-2..2
Wherein sum { } is cumulative and operation, and bl_avg is the backlight average value in preset range, and b1 (h+i, w+j) is cross
To being i back light unit apart from back light unit 1, fore-and-aft distance back light unit 1 is the back light unit of j back light unit.
Then, according to above-mentioned sum_diff, the backlight variation coefficient bl_category_coe for obtaining back light unit 1 is tabled look-up:
Bl_category_coe (h, w)=LUT (sum_diff)
Whether the initial backlight value that above-mentioned backlight variation coefficient mainly distinguishes back light unit 1 needs to carry out blast, judgement
Whether the initial backlight value of back light unit 1 and the backlight value difference of surrounding are high contrast situations, thus based on backlight variation system
Number carries out controlling whether to carry out blast processing.
According to the above method, the backlight variation coefficient of each back light unit can be determined.
In a kind of example, by surrounding's preset range of the initial backlight value of the back light unit and the back light unit in S201
The initial backlight value of at least one interior back light unit is compared, and determines that the neighborhood difference coefficient of the back light unit can wrap
It includes: step C and step D.
Step C determines at least one in the initial backlight value of the back light unit and surrounding's preset range of the back light unit
The difference of the initial backlight value of a back light unit.
Continuation is illustrated by taking back light unit 1 as an example, the reference of other back light units.
Optionally, step C can be, and will preset around the initial backlight value of the back light unit 1 and the back light unit 1
The initial backlight value of each back light unit in range carries out difference operation, the initial backlight value of the back light unit 1 of acquisition
Difference between the initial backlight value of each back light unit in surrounding's preset range of the back light unit 1.
Optionally, step C can be, and will preset around the initial backlight value of the back light unit 1 and the back light unit 1
The initial backlight value of part back light unit in range carries out difference operation, the initial backlight value of the back light unit 1 of acquisition with
Difference between the initial backlight value of part back light unit in surrounding's preset range of the back light unit 1.
Optionally, step C can be, and obtain each first of distance 1 pre-determined distance of back light unit in the preset range
Back light unit.It is then determined the difference of the initial backlight value of the back light unit 1 and the initial backlight value of each first back light unit
Value.Determine according to actual needs, the embodiment of the present application is without limitation for the pre-determined distance, the first back light unit of above-mentioned determination
In preset range.
Each first back light unit of distance 1 pre-determined distance of back light unit in above-mentioned acquisition preset range, comprising: obtaining should
In preset range distance 1 pre-determined distance of back light unit up and down, the first back light unit of left and right four direction.For example, default
Range is that ring_num=2 is 5 × 5, it is assumed that pre-determined distance 1, as shown in Fig. 8 (a), the first back light unit is yin in Fig. 8 (a)
Shadow part.
Optionally, pre-determined distance is equal to the size of the preset range, for example, preset range is ring_num=2, then in advance
If distance is 2, as shown in Fig. 8 (b), the first back light unit is dash area in Fig. 8 (b).
For example, the initial backlight value of back light unit 1 is bl (h, w), preset range is that ring_num=2 (5X5) is
Example, backlight can be enclosed with blast 2, can according to the following formula, determine the initial backlight value and 4 the first backlights of the back light unit 1
The difference of the initial backlight value of unit, is respectively as follows:
Diff_indx_left=abs { bl (h, w)-bl (h, w-2) }；
Diff_indx_right=abs { bl (h, w)-bl (h, w+2) }；
Diff_indx_up=abs { bl (h, w)-bl (h+2, w) }；
Diff_indx_down=abs { bl (h, w)-bl (h-2, w) }；
Abs () seeks for absolute value, and diff_indx_left is first back light unit in left side within the scope of ring_num
The difference of backlight value and the backlight value of back light unit 1, diff_indx_right are first backlight on right side within the scope of ring_num
The difference of the backlight value of the backlight value and back light unit 1 of unit, diff_indx_up are first of top within the scope of ring_num
The difference of the backlight value of the backlight value and back light unit 1 of back light unit, diff_indx_down are lower section within the scope of ring_num
The first back light unit backlight value and back light unit 1 backlight value difference.
Step D determines the back light unit according to the maximum difference and preset neighborhood difference coefficient table in the difference
Neighborhood difference coefficient.
After above-mentioned steps, the initial backlight value of the back light unit 1 and surrounding's preset range of the back light unit are determined
The difference of the initial backlight value of at least one interior back light unit.Then, maximum difference is selected from each difference, optionally, from
Maximum value is selected in the absolute value of above-mentioned each difference.
For example, according to the following formula, selecting maximum difference from above-mentioned each difference:
Diff_neighbor_max=max (diff_indx)；
Wherein, diff_indx is indicated within the scope of ring_num within the scope of the initial backlight value and ring_num of back light unit 1
At least one back light unit initial backlight value difference array.Max () seeks for maximum value.
Then, using the maximum difference of above-mentioned determination as independent variable, the maximum is searched from preset neighborhood difference coefficient table
The corresponding neighborhood difference coefficient of difference, using the neighborhood difference coefficient as the neighborhood difference coefficient of back light unit 1.Wherein, it presets
Field difference coefficient it is as shown in Figure 9.
For example, determining neighborhood difference coefficient of the neighborhood difference coefficient as back light unit 1 by following formula:
Diff_neighbor_coe (h, w)=LUT (diff_neighbor_max)；
Optionally, when the corresponding maximum difference of back light unit determined according to the above method is less than 0, then the maximum difference is enabled
It is 0.
Referring to the above method, the neighborhood difference coefficient of each back light unit can be determined.
S202, backlight variation coefficient and/or neighborhood difference coefficient according to the back light unit, determine the back of the back light unit
Light blast value.
In a kind of example, above-mentioned S202 be can be, and according to the backlight variation coefficient of the back light unit, determine the backlight list
The backlight blast value of member.
In another example, above-mentioned S202 be can be, and according to the neighborhood difference coefficient of the back light unit, determine the backlight
The backlight blast value of unit.
In another example, above-mentioned S202 be can be, according to the backlight variation coefficient and neighborhood difference of the back light unit
Coefficient determines the backlight blast value of the back light unit.
Optionally, in one possible implementation, above-mentioned S202 can also be becomes according to the backlight of the back light unit
Change coefficient, neighborhood difference coefficient and gain adjustment control amount, the initial backlight value of the back light unit is corrected, determines the back
The backlight blast value of light unit.
For example, according to the following formula, determining the backlight blast value of the back light unit:
Bl_enlg_o (h, w)=bl (h, w)+bl_enlg_modul* (bl_category_coe*diff_neighbor_
coe*diff_neighbor_avg)；
Wherein bl_enlg_modul is the control variable of adjust gain size, i.e. gain adjustment control amount, can be to increasing
Bright region controls blast brightness, avoids bright causing picture lofty.Bl_enlg_o is the backlight blast value of back light unit 1；bl
(h, w) is the initial backlight value of back light unit 1.Diff_neighbor_avg is the initial of back light unit 1 within the scope of ring_num
The average value of the difference of backlight value and the initial backlight value of each back light unit within the scope of ring_num.
It should be noted that above-mentioned formula is a kind of example, it can also be according to any one deformation of above-mentioned formula, really
The backlight blast value of the fixed back light unit.
For another example according to the following formula, determining the backlight blast value of the back light unit:
Bl_enlg_o (h, w)=bl (h, w)+bl_enlg_modul* (bl_category_coe*diff_neighbor_
coe*diff_neighbor_max)；
Wherein, diff_neighbor_max is that the corresponding maximum of back light unit 1 that above-mentioned steps C and step D is determined is poor
Value.
It should be noted that above-mentioned formula is a kind of example, it can also be according to any one deformation of above-mentioned formula, really
The backlight blast value of the fixed back light unit.
Illustratively, using the backlight blast value of each back light unit of above-mentioned determination, each back light unit is driven
It is dynamic, it obtains shown in Figure 10 (b), Figure 10 (a) is the picture that prior art determines.Figure 10 (b) compared with Figure 10 (a) it is found that by
Backlight blast treated figure (b), for height compare scene under, the corresponding backlight of bright area in picture can be with blast, this
The entire picture of sample may appear to very bright, and contrast has very high promotion.
Backlight control method provided by the embodiments of the present application, for each back light unit, by the initial of the back light unit
Backlight value is compared with the initial backlight value of at least one back light unit in the surrounding of back light unit preset range, is determined
The backlight variation coefficient and/or neighborhood difference coefficient of the back light unit；According to the backlight variation coefficient of the back light unit and/or neighbour
Domain difference coefficient determines the backlight blast value of the back light unit, and then realizes to the accurate true of the backlight blast value of back light unit
It is fixed.
Figure 11 is the structural schematic diagram of display equipment provided by the embodiments of the present application, as shown in figure 11, the embodiment of the present application
Display equipment include: backlight Emboldening module 110, room and time filter 120, pwm control circuit 130 and backlight 140,
The backlight Emboldening module 110 is connect with the room and time filter 120 and the pwm control circuit 130 respectively, backlight
Source 140 includes M × N number of back light unit, and described M, N are the integer greater than 1；
The room and time filter 120, for the initial backlight value of each back light unit to be sent to the backlight
Emboldening module 110；
The backlight Emboldening module 110, for by the initial backlight value of each back light unit and each backlight
The initial backlight value of back light unit in surrounding's preset range of unit is compared, and determines the backlight blast of each back light unit
Value；And the backlight blast value of each back light unit is sent to the pwm control circuit 130；
The pwm control circuit 130 determines each back light unit for the backlight blast value according to each back light unit.
The display equipment of the present embodiment can be used for executing the technical solution of above-mentioned each method embodiment, realization principle
Similar with technical effect, details are not described herein again.
In one possible implementation, the backlight Emboldening module 110 is specifically used for being directed to each back light unit,
By the initial of the initial backlight value of the back light unit and at least one back light unit in surrounding's preset range of the back light unit
Backlight value is compared, and determines the backlight variation coefficient and/or neighborhood difference coefficient of the back light unit；And according to the back light unit
Backlight variation coefficient and/or neighborhood difference coefficient, determine the backlight blast value of the back light unit.
In alternatively possible implementation, the backlight Emboldening module 110 is specifically used for according to the preset range
The initial backlight value of interior each back light unit determines the corresponding average backlight value of the preset range；And according to the default model
It encloses the sum of difference between the initial backlight value of interior each back light unit and the average backlight value and preset backlight changes
Coefficient table determines the backlight variation coefficient of the back light unit.
In alternatively possible implementation, the backlight Emboldening module 110, specifically for determining the back light unit
The difference of initial backlight value and the initial backlight value of at least one back light unit in surrounding's preset range of the back light unit；Root
According to the maximum difference and preset neighborhood difference coefficient table in the difference, the neighborhood difference coefficient of the back light unit is determined.
In alternatively possible implementation, the backlight Emboldening module 110 is specifically used for obtaining the preset range
Interior each first back light unit apart from the back light unit pre-determined distance；Determine the initial backlight value of the back light unit and each described
The difference of the initial backlight value of first back light unit.
In alternatively possible implementation, the backlight Emboldening module 110 is specifically used for obtaining the preset range
It is interior apart from the back light unit pre-determined distance up and down, the first back light unit of left and right four direction.
Optionally, the pre-determined distance is equal to the size of the preset range.
In alternatively possible implementation, the backlight Emboldening module 110, it is specifically used for according to the back light unit
Backlight variation coefficient and/or neighborhood difference coefficient, the initial backlight value of the back light unit is corrected, determines the backlight list
The backlight blast value of member.
In one possible implementation, the backlight Emboldening module 110, specifically for the back according to the back light unit
Light variation coefficient, neighborhood difference coefficient and gain adjustment control amount are corrected the initial backlight value of the back light unit, determine
The backlight blast value of the back light unit.
The display equipment of the present embodiment can be used for executing the technical solution of above-mentioned each method embodiment, realization principle
Similar with technical effect, details are not described herein again.
Figure 12 is the structural schematic diagram of electronic equipment provided by the embodiments of the present application, as shown in figure 12, the electricity of the present embodiment
Sub- equipment 200 includes:
Memory 220, for storing computer program；
Processor 230, for executing the computer program, to realize the above method, implementing principle and technical effect
Similar, details are not described herein again.
Based on this understanding, the technical solution of the application substantially in other words the part that contributes to existing technology or
The all or part of person's technical solution can be embodied in the form of software products, which is stored in one
In a storage medium, including some instructions are used so that computer equipment (it can be personal computer, server, or
Network equipment etc.) or processor (processor) execute each embodiment the method for the application all or part of the steps.And
Storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory
The various media that can store program code such as device (Random Access Memory, RAM), magnetic or disk.
In the above-described embodiments, can come wholly or partly by software, hardware, firmware or any combination thereof real
It is existing.When implemented in software, it can entirely or partly realize in the form of a computer program product.The computer program
Product includes one or more computer instructions.When loading on computers and executing the computer program instructions, all or
It partly generates according to process or function described in the embodiment of the present application.The computer can be general purpose computer, dedicated meter
Calculation machine, computer network or other programmable devices.The computer instruction can store in computer readable storage medium
In, or from a computer readable storage medium to the transmission of another computer readable storage medium, for example, the computer
Instruction can pass through wired (such as coaxial cable, optical fiber, number from a web-site, computer, server or data center
User's line (DSL)) or wireless (such as infrared, wireless, microwave etc.) mode to another web-site, computer, server or
Data center is transmitted.The computer readable storage medium can be any usable medium that computer can access or
It is comprising data storage devices such as one or more usable mediums integrated server, data centers.The usable medium can be with
It is magnetic medium, (for example, floppy disk, hard disk, tape), optical medium (for example, DVD) or semiconductor medium (such as solid state hard disk
Solid State Disk (SSD)) etc..
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the application, rather than its limitations；To the greatest extent
Pipe is described in detail the application referring to foregoing embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, each embodiment technology of the application that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (13)
1. a kind of backlight control method characterized by comprising
Obtain the initial backlight value of each back light unit, wherein the backlight for showing equipment includes M × N number of back light unit, described
M, N is the integer greater than 1；
By the initial backlight value of each back light unit, with, around each back light unit in preset range at least one
The initial backlight value of a back light unit is compared, and determines the backlight blast value of each back light unit；
According to the backlight blast value of each back light unit, each back light unit is driven.
2. the method according to claim 1, wherein the initial backlight value by each back light unit with
The initial backlight value of at least one back light unit in surrounding's preset range of each back light unit is compared, and is determined every
The backlight blast value of a back light unit, comprising:
For each back light unit, by the initial backlight value of the back light unit and surrounding's preset range of the back light unit extremely
The initial backlight value of a few back light unit is compared, and determines the backlight variation coefficient and/or neighborhood difference of the back light unit
Coefficient；
According to the backlight variation coefficient of the back light unit and/or neighborhood difference coefficient, the backlight blast value of the back light unit is determined.
3. according to the method described in claim 2, it is characterized in that, by the initial backlight value of the back light unit and the back light unit
Surrounding's preset range in the initial backlight value of at least one back light unit be compared, determine that the backlight of the back light unit becomes
Change coefficient, comprising:
According to the initial backlight value of each back light unit in the preset range, the corresponding average backlight of the preset range is determined
Value；
According to the sum of the difference between the initial backlight value of each back light unit in the preset range and the average backlight value
Average value and preset backlight variation coefficient table, determine the backlight variation coefficient of the back light unit.
4. according to the method described in claim 2, it is characterized in that, the initial backlight value by the back light unit and the backlight
The initial backlight value of at least one back light unit in surrounding's preset range of unit is compared, and determines the neighbour of the back light unit
Domain difference coefficient, comprising:
Determine at least one back light unit in the initial backlight value of the back light unit and surrounding's preset range of the back light unit
Initial backlight value difference；
According to the maximum difference and preset neighborhood difference coefficient table in the difference, the neighborhood difference system of the back light unit is determined
Number.
5. according to the method described in claim 4, it is characterized in that, the initial backlight value of the determination back light unit and the back
The difference of the initial backlight value of at least one back light unit in surrounding's preset range of light unit, comprising:
Obtain each first back light unit of the distance back light unit pre-determined distance in the preset range；
Determine the difference of the initial backlight value of the back light unit and the initial backlight value of each first back light unit.
6. according to the method described in claim 5, it is characterized in that, described obtain distance back light unit in the preset range
Each first back light unit of pre-determined distance, comprising:
Obtain the first backlight list of the upper and lower of the distance back light unit pre-determined distance in the preset range, left and right four direction
Member.
7. according to the method described in claim 6, it is characterized in that, the pre-determined distance is equal to the size of the preset range.
8. the method according to claim 2, which is characterized in that described to be changed according to the backlight of the back light unit
Coefficient and/or neighborhood difference coefficient determine the backlight blast value of the back light unit, comprising:
According to the backlight variation coefficient of the back light unit and/or neighborhood difference coefficient, to the initial backlight value of the back light unit into
Row correction, determines the backlight blast value of the back light unit.
9. according to the method described in claim 8, it is characterized in that, the backlight variation coefficient according to the back light unit and/
Or neighborhood difference coefficient, the initial backlight value of the back light unit is corrected, determines the backlight blast value of the back light unit, is wrapped
It includes:
According to the backlight variation coefficient, neighborhood difference coefficient and gain adjustment control amount of the back light unit, to the back light unit
Initial backlight value is corrected, and determines the backlight blast value of the back light unit.
10. the method according to claim 1, wherein the initial backlight value for obtaining each back light unit, packet
It includes:
The initial backlight value of each back light unit is obtained from room and time filter, wherein the display equipment includes institute
State room and time filter.
11. a kind of display equipment characterized by comprising the display equipment includes: backlight Emboldening module, room and time
Filter, pwm control circuit and backlight, the backlight Emboldening module respectively with the room and time filter and described
Pwm control circuit connection, backlight includes M × N number of back light unit, and described M, N are the integer greater than 1；
The room and time filter is used to the initial backlight value of each back light unit being sent to the backlight Emboldening module；
The backlight Emboldening module was used for the week of the initial backlight value of each back light unit and each back light unit
The initial backlight value for enclosing the back light unit in preset range is compared, and determines the backlight blast value of each back light unit；
The backlight blast value of each back light unit is sent to the pwm control circuit；
The pwm control circuit is used for the backlight blast value according to each back light unit, determines each back light unit.
12. a kind of display equipment characterized by comprising processor and memory；
The memory, for storing computer program；
The processor, for executing the computer program, to realize such as the described in any item back of the claims 1-10
Light source control method.
13. a kind of computer readable storage medium characterized by comprising store computer program, institute in the storage medium
It states computer program and realizes such as the described in any item backlight control methods of claim 1-10 when being executed.
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