CN105336298B - Liquid crystal display and its brightness adjusting method and device - Google Patents
Liquid crystal display and its brightness adjusting method and device Download PDFInfo
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 90
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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
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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
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Abstract
The present invention relates to a kind of liquid crystal display and its brightness adjusting methods and device.Wherein, the brightness adjusting method of liquid crystal display includes: that the pixel for carrying out grayscale switching will be needed to be determined as pixel region to be processed in the display panel of the liquid crystal display；According to the corresponding relationship of the backlight area in the pixel and backlight in the display panel, backlight area corresponding with the pixel region to be processed in the backlight is determined as region to be dimmed；And within the liquid crystal deflection period of the pixel progress grayscale switching of the pixel region to be processed, according to the grayscale value of the pixel of the pixel region to be processed, to adjust the brightness in the region to be dimmed.Liquid crystal display and its brightness adjusting method and device according to an embodiment of the present invention can be realized the dynamic compensation to relevant backlight region in backlight, to alleviate the trailing phenomenon in liquid crystal display, so that the brightness finally showed on display panel more tends to unanimously, reach better movement display effect.
Description
Technical field
The present invention relates to field of liquid crystal display more particularly to a kind of liquid crystal displays and its brightness adjusting method and device.
Background technique
The displaying principle of vertical orientation type (English: Vertical Alignment, abbreviation: VA) liquid crystal display is: by
It is corresponding with the luminous flux of liquid crystal molecule in the angle of liquid crystal molecule deflection, it can be by making liquid crystal molecule be deflected to different angles
Degree, correspondingly to control the luminous flux by liquid crystal molecule, to realize the bright dark variation display effect of liquid crystal display.
However, the physical characteristic intrinsic due to liquid crystal molecule, needs the regular hour in deflection, so that grayscale switches
Need the regular hour.For example, there is a phenomenon that white square will appear hangover when from left to right moving under black background.This
Kind trailing phenomenon will affect the display effect of moving image.
Summary of the invention
Technical problem
In view of this, how the technical problem to be solved by the present invention is to mitigate the trailing phenomenon in liquid crystal display.
Solution
According to an aspect of the invention, there is provided a kind of brightness adjusting method of liquid crystal display, comprising: by the liquid
The pixel for carrying out grayscale switching is needed to be determined as pixel region to be processed in the display panel of crystal display；According to the display panel
In pixel and backlight in backlight area corresponding relationship, will be corresponding with the pixel region to be processed in the backlight
Backlight area is determined as region to be dimmed；And the liquid crystal deflection week of the pixel progress grayscale switching in the pixel region to be processed
In phase, according to the grayscale value of the pixel of the pixel region to be processed, to adjust the brightness in the region to be dimmed.
For above-mentioned brightness adjusting method, in one possible implementation, the pixel of the pixel region to be processed
Grayscale value includes the maximum gray value, the average gray-scale value of all pixels and part of all pixels in the pixel region to be processed
Any one in the average gray-scale value of pixel.
For above-mentioned brightness adjusting method, in one possible implementation, according to the picture of the pixel region to be processed
The grayscale value of element includes: according in the pixel and backlight in the display panel to adjust the brightness in the region to be dimmed
Backlight area corresponding relationship, display area corresponding with the region to be dimmed in the display panel is determined as wait locate
Manage display area；And the grayscale value of the pixel according to the display area to be processed, to adjust the bright of the region to be dimmed
Degree, wherein the grayscale value of the pixel of the display area to be processed includes all pixels in the display area to be processed
Any one in the average gray-scale value of maximum gray value, the average gray-scale value of all pixels and partial pixel.
For above-mentioned brightness adjusting method, in one possible implementation, in the pixel of the pixel region to be processed
In the liquid crystal deflection period for carrying out grayscale switching, according to the grayscale value of the pixel of the pixel region to be processed, come adjust it is described to
Dim the brightness in region, comprising: formula 1 is used, to calculate the region to be dimmed in the brightness value of t moment,
Formula 1,
Wherein, A (t) is brightness value of the region to be dimmed in t moment, and B (t) is the pixel of the pixel region to be processed
In the grayscale value of t moment, AmaxIt is the maximum brightness value in the region to be dimmed, a is preset fixed value, and T is that the liquid crystal is inclined
The turn-week phase；And according to the region to be dimmed t moment brightness value, to adjust the region to be dimmed in the bright of t moment
Degree.
According to another aspect of the present invention, a kind of brightness regulating apparatus of liquid crystal display is provided, comprising: first really
Cover half block is configured as the pixel for carrying out grayscale switching being needed to be determined as in the display panel of the liquid crystal display to be processed
Pixel region；Second determining module is connect with first determining module, be configured as according in the display panel pixel with
The corresponding relationship of backlight area in backlight, backlight area corresponding with the pixel region to be processed in the backlight is true
It is set to region to be dimmed；And adjustment module, it is all connected with, is configured with first determining module and second determining module
For the pixel of the pixel region to be processed carry out grayscale switching the liquid crystal deflection period in, according to the pixel region to be processed
The grayscale value of pixel, to adjust the brightness in the region to be dimmed.
For above-mentioned brightness regulating apparatus, in one possible implementation, the pixel of the pixel region to be processed
Grayscale value includes the maximum gray value, the average gray-scale value of all pixels and part of all pixels in the pixel region to be processed
Any one in the average gray-scale value of pixel.
For above-mentioned brightness regulating apparatus, in one possible implementation, second determining module is also configured
For, according to the corresponding relationship of the backlight area in the pixel and backlight in the display panel, by the display panel with
The corresponding display area in the region to be dimmed is determined as display area to be processed；The adjustment module is additionally configured to, according to
The grayscale value of the pixel for the display area to be processed that second determining module is determined, to adjust the region to be dimmed
Brightness, wherein the grayscale value of the pixel of the display area to be processed includes all pictures in the display area to be processed
Any one in the maximum gray value of element, the average gray-scale value of the average gray-scale value of all pixels and partial pixel.
It further include computing module in one possible implementation for above-mentioned brightness regulating apparatus, the calculating mould
Block is all connected with first determining module, second determining module and the adjustment module, is configured as coming using formula 1
The region to be dimmed is calculated in the brightness value of t moment,
Formula 1,
Wherein, A (t) is brightness value of the region to be dimmed in t moment, and B (t) is the pixel of the pixel region to be processed
In the grayscale value of t moment, AmaxIt is the maximum brightness value in the region to be dimmed, a is preset fixed value, and T is that the liquid crystal is inclined
The turn-week phase；The adjustment module is additionally configured to, according to the calculated region to be dimmed of the computing module in t moment
Brightness value, to adjust the region to be dimmed in the brightness of t moment.
According to a further aspect of the invention, a kind of liquid crystal display is provided, comprising: display panel, including multiple pictures
Element；Backlight is divided into multiple backlight areas；And according to embodiments of the present invention in brightness tune described in any implementation
Regulating device adjusts corresponding back in the case where for there is the pixel for needing to carry out grayscale switching in the display panel
The brightness in light region.
Beneficial effect
By need to carry out grayscale switching pixel carry out grayscale switching the liquid crystal deflection period in, always according to these
The grayscale value of pixel, to adjust the brightness of corresponding backlight area, liquid crystal display according to an embodiment of the present invention and its bright
Degree adjusting method and device can be realized the dynamic compensation to relevant backlight region in backlight, to alleviate in liquid crystal display
Trailing phenomenon so that the brightness finally showed on display panel more tends to unanimously, reach better movement display effect
Fruit.
According to below with reference to the accompanying drawings becoming to detailed description of illustrative embodiments, other feature of the invention and aspect
It is clear.
Detailed description of the invention
Comprising in the description and constitute the attached drawing of part of specification and specification together illustrate it is of the invention
Exemplary embodiment, feature and aspect, and principle for explaining the present invention.
Fig. 1 shows the flow chart of the brightness adjusting method of liquid crystal display according to an embodiment of the invention；
Fig. 2 shows the flow charts of the brightness adjusting method of liquid crystal display according to another embodiment of the present invention；
Fig. 3 show in the brightness adjusting method of liquid crystal display according to an embodiment of the invention backlight is divided into it is more
The illustrative diagram of a backlight area；
Fig. 4 shows the flow chart of the brightness adjusting method of the liquid crystal display of another embodiment according to the present invention；
Fig. 5 a to Fig. 5 c shows mistake employed in the brightness adjusting method of liquid crystal display according to an embodiment of the present invention
The illustrative diagram of actuation techniques；
Fig. 6 shows the example of principle employed in the brightness adjusting method of liquid crystal display according to an embodiment of the present invention
Property schematic diagram；
Fig. 7 shows the block diagram of the brightness regulating apparatus of liquid crystal display according to an embodiment of the invention.
Specific embodiment
Below with reference to attached drawing various exemplary embodiments, feature and the aspect that the present invention will be described in detail.It is identical in attached drawing
Appended drawing reference indicate element functionally identical or similar.Although the various aspects of embodiment are shown in the attached drawings, remove
It non-specifically points out, it is not necessary to attached drawing drawn to scale.
Dedicated word " exemplary " means " being used as example, embodiment or illustrative " herein.Here as " exemplary "
Illustrated any embodiment should not necessarily be construed as preferred or advantageous over other embodiments.
In addition, in order to better illustrate the present invention, numerous details is given in specific embodiment below.
It will be appreciated by those skilled in the art that without certain details, the present invention equally be can be implemented.In some instances, for
Method, means, element and circuit well known to those skilled in the art are not described in detail, in order to highlight purport of the invention.
Embodiment 1
Fig. 1 shows the flow chart of the brightness adjusting method of liquid crystal display according to an embodiment of the invention.Such as Fig. 1 institute
Show, this method mainly may include step S100, step S200 and step S300, and each step is described in detail below.
Step S100, the pixel for carrying out grayscale switching will be needed to be determined as picture to be processed in the display panel of liquid crystal display
Plain area.
For example, when the image shown by the display panel of liquid crystal display changes, such as display panel is from display
Black background, which is switched to, is displayed in white image, in fact it could happen that needs the case where brightness of partial pixel is turned up, then this part picture
Region where plain is pixel region to be processed.In particular, it is desirable to which the pixel of pixel region to be processed is switched from the first grayscale d1
To the pixel of the second grayscale d2, wherein the first grayscale d1 can be lesser value, and the second grayscale d2 can be biggish value.
Step S200, according to the corresponding relationship of the backlight area in the pixel and backlight in display panel, by backlight
In backlight area corresponding with pixel region to be processed be determined as region to be dimmed.
In one possible implementation, backlight can be marked off to 9 backlight areas as shown in Figure 3 in advance.
And it is possible to by position of each pixel of display panel in display panel and the position of each backlight area in the backlight
Corresponding relationship be stored in mapping table；It can also be in advance by the number of each pixel of display panel and each backlight area
The corresponding relationship of the number in domain is stored in mapping table.In this way, by searching for above-mentioned mapping table, it can be in backlight
Middle determination backlight area corresponding with pixel region to be processed.
Step S300, within the liquid crystal deflection period that the pixel of pixel region to be processed carries out grayscale switching, according to be processed
The grayscale value of the pixel of pixel region, to adjust the brightness in region to be dimmed.
In one possible implementation, the above-mentioned liquid crystal deflection period is that the pixel of pixel region to be processed is completed from first
Grayscale d1 was switched to for the second grayscale d2 elapsed time.In one possible implementation, backlight may include a large amount of
Light-emitting component, such as direct-light-type backlight etc. is formed by LED dot matrix, by changing the brightness of these light-emitting components, to adjust
The brightness of backlight.Certainly, it is a kind of example that those skilled in the art, which will be understood that dot matrix LED light source only, can also be it
Its form, can be according to practical application come flexible choice.
In this way, brightness adjusting method according to the above embodiment of the present invention carries out ash in the pixel for needing to carry out grayscale switching
In the liquid crystal deflection period of rank switching, always according to the grayscale value of these pixels, to adjust the brightness of corresponding backlight area.
Therefore, brightness adjusting method according to the above embodiment of the present invention, which can be realized, mends the dynamic in relevant backlight region in backlight
It repays, so that the trailing phenomenon in liquid crystal display is alleviated, so that the brightness finally showed on display panel more tends to unanimously,
Better movement display effect is reached.
Embodiment 2
Fig. 2 shows the flow charts of the brightness adjusting method of liquid crystal display according to another embodiment of the present invention.Such as Fig. 2 institute
Show, the main distinction of brightness adjusting method shown in Fig. 2 and brightness adjusting method shown in Fig. 1 is, brightness regulation described in Fig. 1
Method mainly includes step S100, step S200 and step S300, and brightness adjusting method described in Fig. 2 then mainly includes step
S100, step S200, step S310 and step S320.The label step identical as Fig. 1, that is, step S100 and step S200 in Fig. 2
Function having the same omits the detailed description to the two steps for simplicity, and mainly to step S310 and step
S320 is described in detail.
Step S310 is executed after step S200, according to the backlight area in the pixel and backlight in display panel
Display area corresponding with region to be dimmed in display panel is determined as display area to be processed by corresponding relationship.
In this implementation, display panel can be also divided into multiple display areas, wherein each display area
It is corresponding with each backlight area that backlight is marked off.That is, as shown in figure 3, backlight is divided into 9 backlight areas
In the case where, display panel is also divided into 9 display areas corresponding with this 9 backlight areas.
Therefore, with the pixel being stored in advance in display panel in step s 200 and backlight in embodiment 1
In backlight area corresponding relationship it is similar, in the present embodiment, can be in advance by each display area in display panel
Position and the corresponding relationship of the position of each backlight area in the backlight be stored in mapping table；Can also in advance by
The corresponding relationship of the number and the number of each backlight area of each display area is stored in mapping table.In this way, passing through
Above-mentioned mapping table is searched, display area corresponding with region to be dimmed can be determined in display panel.
Then step S320 is executed, according to the grayscale of the pixel of identified display area to be processed in step s310
Value, to adjust the brightness in region to be dimmed.
In the present embodiment, display panel also carries out to being divided into multiple display areas, and according in display panel with to
The pixel gray level value of the corresponding display area (i.e. above-mentioned display area to be processed) in region is dimmed to adjust region to be dimmed
Brightness.
Therefore, in one possible implementation, the pixel in display area to be processed might not be entirely and need
Carry out the pixel of grayscale switching, it is understood that there may be do not need to carry out the pixel of grayscale switching.In view of this in display area to be processed
The pixels for not needing to carry out grayscale switching a bit, adjust the pixel of display area to be processed used in the brightness in region to be dimmed
Grayscale value can be the maximum gray value of all pixels in display area to be processed or the average gray-scale value of all pixels,
Or the average gray-scale value of partial pixel.Wherein, it is higher for example to can be the attention rate in display area to be processed for partial pixel
The pixel either pixel that is affected to the display effect of display panel, certain partial pixel is also possible to need to carry out ash
The pixel of rank switching.
It should be noted that can not also be divided to display panel, in this implementation, according to picture to be processed
The grayscale value of the pixel in plain area adjusts the brightness in region to be dimmed.Wherein, adjust used in the brightness in region to be dimmed to
The grayscale value for handling the pixel of pixel region can be the maximum gray value of all pixels in pixel region to be processed, or all
The average gray-scale value of pixel or the average gray-scale value of partial pixel.With it is above-mentioned display panel is carried out it is each with backlight
Similarly, it is higher that partial pixel for example can be the attention rate in pixel region to be processed to the example that backlight area correspondingly divides
The pixel either pixel that is affected to the display effect of display panel.
Similarly to Example 1, brightness adjusting method according to the above embodiment of the present invention is needing to carry out grayscale switching
Pixel carry out grayscale switching the liquid crystal deflection period in, it is corresponding to adjust also always according to the grayscale value of these pixels
The brightness of backlight area.Therefore, brightness adjusting method according to the above embodiment of the present invention can be realized similarly to Example 1
Beneficial effect can realize the dynamic compensation to relevant backlight region in backlight, to alleviate dragging in liquid crystal display
Tail phenomenon, so that the brightness finally showed on display panel more tends to unanimously, reach better movement display effect.
Embodiment 3
Fig. 4 shows the flow chart of the brightness adjusting method of the liquid crystal display of another embodiment according to the present invention.Such as Fig. 4 institute
Show, brightness adjusting method shown in Fig. 4 is a kind of possible specific implementation of brightness adjusting method shown in Fig. 1.In Fig. 4 label with
Fig. 1 identical step, that is, step S100 and step S200 function having the same are omitted to the two steps for simplicity
It is described in detail, and mainly step S311 and step S321 is described in detail.
As shown in figure 4, in one possible implementation, step S300 may include: step S311, using formula 1, come
Region to be dimmed is calculated in the brightness value of t moment,
Formula 1,
Wherein, A (t) is brightness value of the region to be dimmed in t moment, AmaxIt is the maximum brightness value in region to be dimmed, a is
Preset fixed value, T are the liquid crystal deflection period, correspondingly draw with each backlight area of backlight to display panel
In the case where point, B (t) is grayscale value of the pixel in t moment of display area to be processed, what is do not divided to display panel
In the case of, B (t) is grayscale value of the pixel in t moment of pixel region to be processed；And
Step S321, according to region to be dimmed t moment brightness value, to adjust region to be dimmed in the brightness of t moment.
The brightness adjusting method of the present embodiment is further illustrated below with reference to Fig. 5 a, Fig. 5 b, Fig. 5 c and Fig. 6.In this reality
It applies in mode, in order to further increase liquid crystal display panel to the display response speed of image to be displayed data, additionally uses
(English: over driving) technology overdrive to accelerate the rotation of liquid crystal molecule.So-called overdrive technique, refers to display
The initial stage of liquid crystal molecule driving in panel applies than so that the liquid crystal molecule target excitation that reaches dbjective state is higher
Excitation, when liquid crystal molecule is close to dbjective state, excitation reverts to target excitation.
Overdrive technique used by present embodiment is described in detail below with reference to Fig. 5 a, Fig. 5 b and Fig. 5 c.Such as Fig. 5 a institute
Show, in the case where common driving, when the grayscale of pixel is switched to the second grayscale d2 by the first grayscale d1, needs t1 to t4 three
Time cycle.As shown in Figure 5 b, equally in the case where common driving, grayscale is switched to by the first grayscale d1 than the second grayscale d2
When big third grayscale d3, it is also desirable to which three time cycles of t1 to t4 have still just reached second in the grayscale of t2 moment pixel
The brightness of grayscale d2, display panel have reached brightness I2 corresponding with the second grayscale d2.It is therefore possible to use shown in Fig. 5 c
Method, apply corresponding with third grayscale d3 excitation within the time cycle of t1 to t2, within the time cycle of t2 to t4
Apply corresponding with the second grayscale d2 excitation, then pixel can be made to be switched to the from the first grayscale d1 within a time cycle
Two grayscale d2, the brightness of display panel then within a time cycle from brightness I1 corresponding with the first grayscale d1 be switched to
The corresponding brightness I2 of second grayscale d2, to improve the response speed of picture.
Can be to a certain extent by liquid crystal deflection cycle time using overdrive technique, still, liquid crystal deflection still needs
A time cycle is wanted, still there may be trailing phenomenon.The present inventor through repeatedly the study found that liquid crystal deflection initial stage rank
Section, the grayscale value of pixel is smaller, and the brightness of display panel is lower, and therefore, innovatively proposing can be at the initial stage of liquid crystal deflection
The brightness of backlight is transferred to maximum by the stage, and later as the grayscale value of pixel increases, the brightness of display panel is increased, and by
The brightness for gradually reducing backlight, so that the brightness that display panel finally shows more tends to unanimously.
Brightness regulation principle used by being described in detail according to embodiments of the present invention below with reference to Fig. 6.Firstly, it is necessary to illustrate
, there is the pixel (there is above-mentioned pixel to be treated area) for needing grayscale to switch in the display panel of liquid crystal display
In the case of, since the grayscale of pixel switches, so that the brightness of corresponding display area changes in display panel.With above-mentioned
The pixel needs of pixel region to be processed are switched to for the second grayscale d2 from the first grayscale d1, wherein the first grayscale d1 can be
Lesser value, such as minimum value, the second grayscale d2 can be biggish value, such as maximum value.In this case, liquid crystal display
Display area corresponding with pixel region to be processed will be switched to higher brightness from lower brightness in the display panel of device.
As shown in fig. 6, abscissa t indicates the time, ordinate I indicates the brightness of display panel.Inside display panel
The intrinsic physical characteristic of liquid crystal molecule, the deflection of liquid crystal molecule needs the regular hour, and therefore, pixel completes grayscale switching
Need the regular hour.In Fig. 6, the period of t1 to t3 can be seen as the liquid crystal deflection period, i.e., pixel region to be processed
Pixel complete from the first grayscale d1 to be switched to for the second grayscale d2 elapsed time.
From figure shown in fig. 6, it can be seen that at the initial stage in liquid crystal deflection period, the grayscale value of pixel is smaller, display panel
Brightness it is lower, therefore, maximum first is transferred in the brightness of corresponding backlight area, later as the grayscale value of pixel gradually becomes
Greatly, the brightness of display panel increases, then the brightness of corresponding backlight area is gradually decreased.
In one possible implementation, as shown by above-mentioned formula 1, in initial time (the i.e. t in liquid crystal deflection period
At the time of=0), the brightness value in region to be dimmed is set as maximum value Amax, (i.e. 0 < t≤T period in the period later
It is interior), according to the grayscale value of the pixel of display area to be processed (or pixel region to be processed) and the brightness value in region to be dimmed
Product is constant, the brightness value in region to be dimmed is arranged, to adjust the brightness in region to be dimmed.
Brightness adjusting method according to the above embodiment of the present invention according to the grayscale value of the pixel of display area to be processed or
The grayscale value of the pixel of person's pixel region to be processed carries out dynamic compensation to relevant backlight region in backlight, to also can
Beneficial effect same as Examples 1 and 2, i.e. trailing phenomenon in mitigation liquid crystal display are realized, so that final on display panel
The brightness showed more tends to unanimously, reach preferably movement display effect.
Comparative example
As comparative example of the invention, explanation generallys use in LCD technology below local dimming (English:
Local Dimming) technology, which is also divided into many small regions for backlight, according to image data to display
In Luminance Distribution correspondingly adjust the brightness of backlight area, thus the effect realized energy conservation, promote contrast.In this feelings
Under condition, when needing to show brighter image data, since the brightness of display panel will increase, so improving corresponding back
The brightness in light region, and when needing to show darker image data, since the brightness of display panel will reduce, so reducing
The brightness of corresponding backlight area.
Specifically, by have under black background a white square from left to right move for, it is assumed that backlight it is most highlighted
Degree is BLmax, display screen Gamma is denoted as r, and the grayscale of black background is 0, and the grayscale of white square is G1(0<G1<255).White
Color square is shown from display area corresponding with backlight area 4 shown in Fig. 3 to corresponding with backlight area 5 shown in Fig. 3
In the case where showing that region is soon moved, the backlight illumination at backlight area 5 can be at certain in a flash by secretly brightening, in display panel
The pixel gray level of display area corresponding with white square can also change.Display panel is corresponding with white square aobvious
Show that the brightness value at the pixel gray level value and backlight area 5 in region can be counted by formula 2-1 shown below, formula 2-2 and formula 2-3
It calculates.
Formula 2-1,
Formula 2-2,
Formula 2-3,
As shown in formula 2-1, the pixel ash of display area corresponding with white square in display panel can be properly increased
Rank value, such as be set as 255, then the target value of the backlight illumination at corresponding backlight area 5 can be from BLmaxIt is reduced to BL2,
I.e., the display area in display panel from display black background be switched to be displayed in white square in the case where, needing will be opposite
It is BL that the backlight illumination at backlight area 5 answered, which is switched to from brightness corresponding with minimum brightness value with brightness value,2Relatively
The brightness answered, rather than being switched to from brightness corresponding with minimum brightness value with brightness value is BLmaxCorresponding brightness,
Achieve the purpose that reduce power consumption with this.In the grayscale G of white square1In the case where 255, in order not to apparent product occur
The pixel gray level value of display area corresponding with white square in display panel can slightly be improved to one and is subjected to by taste problem
Value G2, the target value BL of the backlight illumination at corresponding backlight area 5 can be calculated by formula 2-2 and formula 2-3 at this time2。
However, the switch speed due to backlight illumination is exceedingly fast, and existing this local dimming mode directly will
Backlight brightness values are switched to target value from initial value, therefore, can become in a flash from starting brightness in the brightness of backlight area
For object brightness.But the switching of pixel gray level needs a period of time, therefore, even if also being still remained using overdrive technique
There is trailing phenomenon because the grayscale switch speed of pixel is relatively slow.
Entirely different with local dimming mode employed in above-mentioned comparative example, the present inventor proposes a kind of completely new brightness
Adjusting method (possible specific implementation may refer to embodiment 1-3), according to the grayscale of the pixel of display area to be processed
The grayscale value of value or the pixel of pixel region to be processed carries out dynamic compensation to relevant backlight region in backlight, to subtract
Trailing phenomenon in light liquid crystal display, so that the brightness finally showed on display panel more tends to unanimously, realize more
Good movement display effect.
In addition, it is necessary to explanation, brightness adjusting method of the invention can be not only used for for backlight area into
Capable brightness regulation can be also used for being directed in pixel to be processed situation corresponding with two or more backlight areas
The two or above backlight area carry out brightness regulation.
For example, in the case where the pixel of grayscale to be occurred switching corresponds to backlight area 5 as shown in Figure 3, for back
Light region 5 carries out brightness regulation, and in the case where the pixel of grayscale to be occurred switching corresponds to backlight area 4 and 5, it to be directed to
Backlight area 4 and 5 carries out brightness regulation.
But no matter those skilled in the art will be understood that for several backlight areas progress brightness regulation, as long as using
Brightness adjusting method described in any of the above-described embodiment of the present invention, is directed to each backlight area respectively, according to the backlight area
The grayscale value of pixel to be processed corresponding to the grayscale value of pixel in display area corresponding to domain or the backlight area comes
Dynamic compensation is carried out to the backlight area, the trailing phenomenon in liquid crystal display can be mitigated, and is made final on display panel
The brightness showed more tends to unanimously, to realize preferably movement display effect.
Embodiment 4
Fig. 7 shows the block diagram of the brightness regulating apparatus of liquid crystal display according to an embodiment of the invention.As shown in fig. 7,
The device mainly includes the first determining module 410, it is configured as needing to carry out grayscale in the display panel by liquid crystal display cutting
The pixel changed is determined as pixel region to be processed；Second determining module 420 connect with the first determining module 410, is configured as basis
The corresponding relationship of the backlight area in pixel and backlight in display panel, will be corresponding with pixel region to be processed in backlight
Backlight area is determined as region to be dimmed；And adjustment module 430, it is equal with the first determining module 410 and the second determining module 420
Connection is configured as within the liquid crystal deflection period that the pixel of pixel region to be processed carries out grayscale switching, according to pixel to be processed
The grayscale value of the pixel in area, to adjust the brightness in region to be dimmed.
Wherein, the realization mechanism of the first determining module 410, the second determining module 420 and adjustment module 430 can be referring in particular to
To the explanation of step S100, step S200 and step S300 in embodiment 1.Also, it is apparent that above-mentioned implementation according to the present invention
The brightness regulating apparatus of example can be realized beneficial effect identical with method described in embodiment 1, can realize to backlight
The dynamic in middle relevant backlight region compensates, so that the trailing phenomenon in liquid crystal display is alleviated, so that final table on display panel
Reveal the brightness come to more tend to unanimously, reach better movement display effect.
In one possible implementation, in the brightness regulating apparatus of the above embodiment of the present invention, pixel to be processed
The grayscale value of the pixel in area may include the average ash of the maximum gray value of all pixels in pixel region to be processed, all pixels
Any one in rank value and the average gray-scale value of partial pixel.
In one possible implementation, in the brightness regulating apparatus of the above embodiment of the present invention, second determines mould
Block 420 can be additionally configured to, and according to the corresponding relationship of the backlight area in the pixel and backlight in display panel, will show
Display area corresponding with region to be dimmed is determined as display area to be processed in panel；Adjustment module 430 can also be configured
For the grayscale value of the pixel for the display area to be processed determined according to the second determining module 420, to adjust region to be dimmed
Brightness, wherein the grayscale value of the pixel of display area to be processed includes the maximum ash of all pixels in display area to be processed
Any one in the average gray-scale value of rank value, the average gray-scale value of all pixels and partial pixel.
Wherein, the second determining module 420 of above-mentioned implementation and the realization mechanism of adjustment module 430 can be referring in particular to realities
It applies in example 2 to the explanation of step S310 and step S320.Also, it is apparent that the brightness of above-mentioned implementation according to the present invention
Regulating device can be realized beneficial effect identical with method described in embodiment 2.
In one possible implementation, the brightness regulating apparatus of the above embodiment of the present invention can also include calculating mould
Block 440, wherein computing module 440 is all connected with the first determining module 410, the second determining module 420 and adjustment module 430, and
And be configured as using formula 1, to calculate region to be dimmed in the brightness value of t moment,
Formula 1,
Wherein, A (t) is brightness value of the region to be dimmed in t moment, and B (t) is the pixel of pixel region to be processed in t moment
Grayscale value, AmaxIt is the maximum brightness value in region to be dimmed, a is preset fixed value, and T is the liquid crystal deflection period；
Adjustment module 430 can be additionally configured to, according to the calculated region to be dimmed of computing module 440 in t moment
Brightness value, to adjust region to be dimmed in the brightness of t moment.
The computing module 440 of above-mentioned implementation and the realization mechanism of adjustment module 430 can be referring in particular to right in embodiment 3
The explanation of step S311 and step S321.Also, the, it is apparent that brightness regulating apparatus energy of above-mentioned implementation according to the present invention
It is enough to realize beneficial effect identical with method described in embodiment 3.
The present invention also provides a kind of embodiments of liquid crystal display, and liquid crystal display includes: display according to this embodiment
Panel, including multiple pixels；Backlight is divided into multiple backlight areas；And according to the bright of any of the above-described kind of implementation
Regulating device being spent, in the case where for there is the pixel for needing to carry out grayscale switching in display panel, adjusting corresponding back
The brightness in light region.Since the liquid crystal display of the present embodiment includes the brightness regulating apparatus of any of the above-described kind of implementation, because
This, the liquid crystal display of the present embodiment has beneficial effect achieved by the brightness regulating apparatus with any of the above-described kind of implementation
The identical beneficial effect of fruit can realize the dynamic compensation to relevant backlight region in backlight, to alleviate liquid crystal
Trailing phenomenon in showing, so that the brightness finally showed on display panel more tends to unanimously, it is aobvious to have reached better movement
Show effect.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (9)
1. a kind of brightness adjusting method of liquid crystal display characterized by comprising
The pixel for carrying out grayscale switching will be needed to be determined as pixel region to be processed in the display panel of the liquid crystal display；
According to the corresponding relationship of the backlight area in the pixel and backlight in the display panel, by the backlight with institute
It states the corresponding backlight area of pixel region to be processed and is determined as region to be dimmed；And
Within the liquid crystal deflection period that the pixel of the pixel region to be processed carries out grayscale switching, according to the pixel region to be processed
Pixel grayscale value, to adjust the brightness in the region to be dimmed, wherein in the initial stage of liquid crystal deflection, will it is described to
The brightness regulation for dimming region is the maximum brightness value in the region to be dimmed, later with the pixel of the pixel region to be processed
Grayscale value increase, gradually decrease the brightness in the region to be dimmed.
2. brightness adjusting method according to claim 1, which is characterized in that the grayscale of the pixel of the pixel region to be processed
Value includes maximum gray value, the average gray-scale value of all pixels and the partial pixel of all pixels in the pixel region to be processed
Average gray-scale value in any one.
3. brightness adjusting method according to claim 1, which is characterized in that according to the pixel of the pixel region to be processed
Grayscale value includes: to adjust the brightness in the region to be dimmed
According to the corresponding relationship of the backlight area in the pixel and backlight in the display panel, by the display panel with
The corresponding display area in the region to be dimmed is determined as display area to be processed；And according to the display area to be processed
The grayscale value of pixel, to adjust the brightness in the region to be dimmed, wherein the grayscale value of the pixel of the display area to be processed
Maximum gray value, the average gray-scale value of all pixels and partial pixel including all pixels in the display area to be processed
Average gray-scale value in any one.
4. brightness adjusting method according to any one of claim 1 to 3, which is characterized in that in the pixel to be processed
The pixel in area carried out in the liquid crystal deflection period of grayscale switching, according to the grayscale value of the pixel of the pixel region to be processed, to adjust
Save the brightness in the region to be dimmed, comprising:
Using formula 1, to calculate the region to be dimmed in the brightness value of t moment,
Wherein, A (t) is brightness value of the region to be dimmed in t moment, and B (t) is the pixel of the pixel region to be processed in t
The grayscale value at moment, AmaxIt is the maximum brightness value in the region to be dimmed, a is preset fixed value, and T is the liquid crystal deflection
Period；And
According to the region to be dimmed t moment brightness value, to adjust the region to be dimmed in the brightness of t moment.
5. a kind of brightness regulating apparatus of liquid crystal display characterized by comprising
First determining module is configured as the pixel for needing to carry out grayscale switching in the display panel of the liquid crystal display is true
It is set to pixel region to be processed；
Second determining module is connect with first determining module, is configured as according to the pixel and back in the display panel
The corresponding relationship of backlight area in light source determines backlight area corresponding with the pixel region to be processed in the backlight
For region to be dimmed；And
Adjustment module is all connected with first determining module and second determining module, is configured as described to be processed
The pixel of pixel region carried out in the liquid crystal deflection period of grayscale switching, according to the grayscale value of the pixel of the pixel region to be processed,
To adjust the brightness in the region to be dimmed, wherein in the initial stage of liquid crystal deflection, by the brightness tune in the region to be dimmed
The maximum brightness value in section region to be dimmed for described in, later as the grayscale value of the pixel of the pixel region to be processed increases, by
Gradually reduce the brightness in the region to be dimmed.
6. brightness regulating apparatus according to claim 5, which is characterized in that the grayscale of the pixel of the pixel region to be processed
Value includes maximum gray value, the average gray-scale value of all pixels and the partial pixel of all pixels in the pixel region to be processed
Average gray-scale value in any one.
7. brightness regulating apparatus according to claim 5, which is characterized in that
Second determining module is additionally configured to, according to the backlight area in the pixel and backlight in the display panel
Display area corresponding with the region to be dimmed in the display panel is determined as display area to be processed by corresponding relationship；
The adjustment module is additionally configured to, according to the picture for the display area to be processed that second determining module is determined
The grayscale value of element, to adjust the brightness in the region to be dimmed, wherein the grayscale value packet of the pixel of the display area to be processed
Include the maximum gray values of all pixels in the display area to be processed, the average gray-scale value of all pixels and partial pixel
Any one in average gray-scale value.
8. brightness regulating apparatus according to any one of claims 5 to 7, which is characterized in that it further include computing module,
The computing module is all connected with first determining module, second determining module and the adjustment module, is matched
It is set to using formula 1, to calculate the region to be dimmed in the brightness value of t moment,
Wherein, A (t) is brightness value of the region to be dimmed in t moment, and B (t) is the pixel of the pixel region to be processed in t
The grayscale value at moment, AmaxIt is the maximum brightness value in the region to be dimmed, a is preset fixed value, and T is the liquid crystal deflection
Period；
The adjustment module is additionally configured to, according to the calculated region to be dimmed of the computing module in the bright of t moment
Angle value, to adjust the region to be dimmed in the brightness of t moment.
9. a kind of liquid crystal display characterized by comprising
Display panel, including multiple pixels；
Backlight is divided into multiple backlight areas；And
The brightness regulating apparatus according to any one of claim 5 to 8, in the display panel exist need into
In the case where the pixel of row grayscale switching, the brightness of corresponding backlight area is adjusted.
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| CN201510776363.9A CN105336298B (en) | 2015-11-13 | 2015-11-13 | Liquid crystal display and its brightness adjusting method and device |
| PCT/CN2016/098793 WO2017080299A1 (en) | 2015-11-13 | 2016-09-13 | Liquid crystal display, and luminance adjusting method and apparatus therefor |
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| CN201510776363.9A CN105336298B (en) | 2015-11-13 | 2015-11-13 | Liquid crystal display and its brightness adjusting method and device |
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| CN105336298B (en) * | 2015-11-13 | 2019-01-11 | 合一智能科技（深圳）有限公司 | Liquid crystal display and its brightness adjusting method and device |
| KR102508461B1 (en) * | 2016-05-16 | 2023-03-09 | 삼성디스플레이 주식회사 | Display device |
| CN107945751B (en) | 2017-10-10 | 2019-09-17 | 惠科股份有限公司 | Liquid crystal display driving method, device and equipment |
| CN107799079B (en) * | 2017-10-10 | 2019-06-11 | 惠科股份有限公司 | Liquid crystal display driving method, device and equipment |
| CN107808647B (en) * | 2017-10-10 | 2019-06-11 | 惠科股份有限公司 | Liquid crystal display driving method, device and equipment |
| CN107978280A (en) * | 2017-12-12 | 2018-05-01 | 北京京东方光电科技有限公司 | A kind of backlight module driving method, device, display device and backlight module |
| CN107863085B (en) | 2017-12-20 | 2019-08-06 | 惠科股份有限公司 | Display device and driving method thereof |
| JP2019154008A (en) * | 2018-03-06 | 2019-09-12 | シャープ株式会社 | Stereoscopic image display device, method for displaying liquid crystal display, and program for liquid crystal display |
| CN113748457B (en) * | 2020-03-27 | 2022-07-29 | 京东方科技集团股份有限公司 | Display data processing method of display device, electronic device, and storage medium |
| CN114127833B (en) * | 2020-05-26 | 2024-06-04 | 西安诺瓦星云科技股份有限公司 | Display screen configuration method, device and system and computer readable storage medium |
| CN112017609B (en) * | 2020-09-03 | 2021-07-23 | Tcl华星光电技术有限公司 | Control method of display panel, display panel and display device |
| CN114267303B (en) * | 2021-12-31 | 2022-08-09 | 北京显芯科技有限公司 | Method, device and equipment for adjusting brightness |
| CN114624008B (en) * | 2022-03-07 | 2023-12-15 | Oppo广东移动通信有限公司 | Smear test method, device and system, computer equipment and readable storage medium |
| CN114512103B (en) * | 2022-04-19 | 2022-07-12 | 惠科股份有限公司 | Backlight module and display device |
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