CN108231013B - A kind of image processing method and liquid crystal display - Google Patents
A kind of image processing method and liquid crystal display Download PDFInfo
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Abstract
Image processing method and image processing apparatus and liquid crystal display provided in an embodiment of the present invention, belong to field of image processing, backlight value in each backlight subarea is obtained according to the gray-scale intensity values of display image, according to comparison result between the backlight value of target backlight subarea and the backlight value weighted mean of other backlight subareas, compensate the corresponding display subregion sub-pixel show value in the target backlight subarea, due to showing that image gray-scale level luminance difference brings backlight illumination difference in each display subregion, backlight illumination difference brings local colour cast problem in the display subregion, and determine the regularity of difference and colour cast between backlight illumination, mitigate colour cast phenomenon by compensation display image sub-pixel show value.
Description
The application be propose on December 09th, 2015 entitled " a kind of image processing method and liquid crystal display are set
It is standby " Chinese invention patent application 201510902188.3 divisional application.
Technical field
The present invention relates to field of liquid crystal display more particularly to a kind of image processing methods and liquid crystal display.
Background technique
Liquid crystal display (Liquid Crystal Display, abbreviation LCD) generallys use dynamic backlight modulation technique
It controls the backlight brightness, can reach energy conservation, promoted and the image qualities effect such as display contrast.If Fig. 1 is liquid crystal in the prior art
Showing that middle dynamic backlight modulation technique principle assumption diagram, liquid crystal display device include, image processing part receives received image signal, and
Backlight data is collected according to picture signal gray-scale intensity, on the one hand, according to the specification of predetermined display panel by picture signal
Carry out format transformation, output sequence controller (TCON) into liquid-crystal display section, through sequence controller production timing control letter
Number and data-signal to drive liquid crystal display panel, on the other hand, the backlight data collected is exported to backlight processing unit, the back
Backlight data is converted to backlight control signal by light processing portion, controls backlight in backlight assembly to control backlight drive portion
Brightness drives higher backlight illumination if brightness of image height, if brightness of image is low to drive lower backlight illumination.
Dynamic backlight modulation technique mainly includes subregion backlight modulation and global backlight modulation.Wherein, global backlight modulation
Technology acquires the average brightness of a frame picture material to control the backlight brightness, in this way, backlight intrinsic brilliance is by a frame overall situation figure
As average gray-scale value determines, therefore, the corresponding driving of image averaging maximum gray value (that is: complete white field picture) obtains backlight maximum
Brightness, in order to protect back light functional reliability, usual backlight maximum brightness controls the nominal operation brightness of backlight or less.
Usually in normally display picture, through statistics it is found that in dynamic video picture ensemble average gray-scale intensity in 50%IRE or so, this
Sample, the average value of backlight illumination are then 50% or so of maximum backlight illumination, and therefore, backlight is real in global backlight modulation techniques
Border runs mean power control in the half or so of rated power, is there is apparent energy-saving effect to a certain degree.But global back
The collected frame of light modulation techniques or the global image of continuous multiple frames are averaged gray-scale intensity, are controlled by the image averaging grayscale
Global back light source brightness, the image averaging gray-scale intensity can not embody in picture material luminance detail between partial picture, however,
Picture contrast variation is more embodied in picture material between partial picture on luminance difference, therefore, to promotion display pair
It can be played a role than the image quality effect of degree smaller.
And subregion dynamic backlight modulation technique, such as backlight subarea in Fig. 2 in the prior art subregion dynamic backlight modulation technique
Schematic diagram, entire backlight source matrix include the M subregion in the direction A and N number of subregion in the direction B, and such as figure assumes M=16, and M* is counted in N=9
N=144 backlight subarea, control can be operated alone in back light source brightness in each backlight subarea, wherein it should be noted that, the backlight
Ideally, each backlight subarea can independently illuminate its backlight area to subregion, but in fact, adjacent back light source brightness has one
Fixing is rung.In subregion dynamic backlight modulation technique, every frame global image is divided into multiple subregions corresponding with backlight subarea
Video data block, by acquiring with luma data in the sectional image data block to obtain the backlight number of the corresponding backlight subarea
According to each subregion backlight data collected embodies luminance difference between corresponding sectional image data block, in this way, the backlight
Subregion backlight illumination is determined that the variation of subregion backlight illumination, which embodies, to be needed to show by the brightness of the backlight subarea correspondence image block
Gray-scale intensity in the sectional image data block of regional display highlights display brightness difference between display image local picture, mentions
Rise the contrast image quality effect of dynamic image.
For inventor when using common phosphors LED white light source, the color of white light source is basic in each backlight subarea
Unanimously, colour cast phenomenon is not had.Since common phosphors LED white light source principle is by BLUE LED emissions chip emission blue light
It excites yellow fluorescent powder to generate yellow light and blue light into white, and is not made of pure color green light and feux rouges in yellow light, caused
Common phosphors LED light white light source gamut range is not high, substantially in 70%NTSC or less (full name in English: National
Television Standards Committee).In order to improve liquid crystal display gamut range, takes and made using technology of quantum dots
Backlight is provided for liquid crystal display, the gamut range of backlight is up to 85%NTSC or more, even more than 100%NTSC.Show
Example, quanta point material is encapsulated among two layers of water oxygen barrier film and forms quantum dot film, then quantum dot film setting is being expanded
It falls apart or the top of light guide plate, generates green light and feux rouges using quanta point material in blue light emitting chip excitation quantum dot film,
And it is mixed into white backlight source, to promote the gamut range in white backlight source.
But when being dynamic partition backlight control techniques using quantum membrane technology, inventor's discovery and common LED chip
Excitated fluorescent powder is provided unlike white backlight source, equally using in subregion backlight technology scheme, excites quantum in LED chip
The luminous backlight of point, the corresponding display sectional image color in each backlight subarea show the local colour cast phenomenon of randomness, and
This part colour cast regularity is poor.Such as: when intermediate region shows as white, and surrounding is biased to blue, inventor
It solves the problems, such as that edge is partially blue, reduces blue luminescence chip power, it may be assumed that lower the ingredient of blue light, in this way, surrounding can be solved
The blue in edge region, however, yellow is but biased in intermediate region, it may be assumed that intermediate region green light and feux rouges are on the high side.
The liquid crystal display for how cracking the dynamic partition backlight control techniques for providing backlight using quantum dot membrane technology is set
The inconsistent reason of each display subregion color in standby, and solve the problems, such as each subregion colour consistency, become and needs to solve
Certainly technical problem.
Summary of the invention
The embodiment of the present invention provides a kind of image processing method and liquid crystal display, can effectively solve the problem that and is taking quantum dot
Technology is provided in the liquid crystal display of the subregion backlight control of backlight, shows picture part colour cast problem.
In order to achieve the above objectives, a kind of liquid crystal display, backlight are provided in technical solution used in the embodiment of the present invention
Comparing section is compared according to the backlight value of target backlight subarea with the backlight value of other backlight subareas of surrounding；Control unit is compensated,
Determine that the target shows the pixel voltage offset of each sub-pixel in subregion according to backlight value comparison result；Compensation circuit,
According to the determination pixel voltage offset to control the pixel voltage value for compensating the target and showing each sub-pixel in subregion.
Liquid crystal display provided in an embodiment of the present invention, according to the backlight value of target backlight subarea and other backlights of surrounding
The backlight value of subregion is compared；Determine that the target shows the pixel of each sub-pixel in subregion according to backlight value comparison result
Voltage compensation value；Each sub-pixel in subregion is shown according to the determination pixel voltage offset to control the compensation target
Pixel voltage value carrys out backlight colour cast to light belt after making up and causes display image color cast problem.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, 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 only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 provides a kind of liquid crystal display for the prior art and shows complete white picture drawing；
Fig. 2 provides the display subregion light schematic diagram that a kind of liquid crystal display shows complete white picture for the prior art；
Fig. 3 is one schematic diagram of liquid crystal display colour cast causation analysis；
Fig. 4 is a kind of liquid crystal display in this implementation；
Fig. 5 is that this implementation one provides a kind of flow diagram of image processing method；
Fig. 6 is the division schematic diagram that screen display subregion is shown in liquid crystal display；
Fig. 7 is the backlight subarea schematic diagram of division corresponding with Fig. 6 display subregion；
Fig. 8 is a kind of image processing apparatus schematic diagram；
Fig. 9 is the pixel voltage collocation structure schematic diagram of liquid crystal display in the present invention；
Figure 10 is that the present embodiment two provides a kind of structural schematic diagram of liquid crystal display；
Figure 11 is reference voltage generating unit outputting reference voltage value schematic diagram in the present embodiment two；
Figure 12 is that the present embodiment three provides a kind of structural schematic diagram of liquid crystal display.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In the liquid crystal display of dynamic partition backlight control techniques that backlight is provided using quantum dot membrane technology, it is
Solve in the liquid crystal display that the inconsistent technical problem of local color, inventor are preliminary in each subregion in display area
According to the analysis, being quantum dot in quantum dot film due to occurring colour cast problem immediate cause under the power same case of blue-light source
Material mixture ratio unevenly caused by, it may be assumed that if intermediate region is pure white and peripheral regions when being biased to blue, necessarily quantum dot
The quanta point material proportion of film intermediate region matches preferably with blue ray, and quanta point material is matched in peripheral regions quantum dot film
Than relatively low, cause peripheral regions blue ray ingredient on the high side and cause peripheral regions partially blue, therefore, inventor continues amount of analysis
The proportion of the quanta point material in each region finds that quanta point material proportion is highly uniform in quantum dot film in son point film, does not deposit
In the above problem.
In above-mentioned local colour cast phenomenon, intermediate region is for pure white and when peripheral regions deviation blue, at the beginning of inventor
The reason of step thinks the phenomenon should have relationship with display area position.Inventor continues analysis and learns, measures when in quantum dot film
Son point material mixture ratio is uniform and each backlight subarea in blue luminescence chip power also in identical situation, if Fig. 3 is liquid crystal
Show one schematic diagram of equipment colour cast causation analysis, as shown in figure 3, white light source issues blue light booster dose by LED luminescence chip
Son puts quanta point material in film and issues green light and feux rouges and be uniformly mixed into white light with the blue light transmitted through quantum dot film.However,
When intermediate region shows whole white image and surrounding adjacent area also shows whole white image, intermediate region LED chip is driven
With LED chip transmission power in adjacent area all up to 100%, in the intermediate region white light source, a part is by middle medium blue
LED luminescence chip excite quanta point material and between the forward direction green light G0 generated and forward direction feux rouges R0 and the blue light of transmission light mixing and
At another part is for the adjacent blue-ray LED luminescence chip excitation of surrounding and to green light G1 and backward feux rouges R1 through reflecting after generation
Blue light light mixing forms after to intermediate region and intermediate region blue-ray LED luminescence chip transmission quantum film, this two parts green light and red
When light and transmission blue light are at white, however, can receive reflection green light and feux rouges in the region of edge with respect to middle area
Domain will less, and the blue light ingredient of transmission is identical as intermediate region, therefore, blue light in white light ingredient after the light mixing of edge region
Ingredient is on the high side, and causes partially blue.But when inventor has found different images content, such as: intermediate region whole white image,
And surrounding adjacent area brightness of image it is lower when, and find that intermediate region is also partially blue, and the partially blue phenomenon of peripheral regions weakens,
Therefore, inventor has found colour cast phenomenon and display area position without direct relation.
Inventor largely analyzed and Experimental comparison after, finally just find the regularity of above-mentioned local colour cast, colour cast master
There is direct relation with LED light emission luminance difference in adjacent backlight subarea, if image display brightness is identical in each subregion,
Local colour cast phenomenon is not had.When there are when display brightness difference in adjacent each subregion, it may be assumed that the liquid crystal of dynamic partition backlight control
It shows that the backlight illumination of each adjacent backlight subarea in equipment is different, the colour cast phenomenon of adjacent display subregion can be generated.Inventor
Based on above-mentioned colour cast rule, further analysis finds colour cast reason, as shown in figure 3, when intermediate region and adjacent area show image
Brightness is identical, it may be assumed that corresponding backlight illumination is also identical, and white backlight composition in intermediate region includes that a part of LED chip 1 shines
Excitation intermediate region quantum dot generates green light and red and transmitting blue is mixed into white light, and another part is what LED chip 1 transmitted
LED chip 2 and LED chip 3, which shine, in blue light and adjacent area excites the backward light of the green of quantum dot generation and red backward light
Blue light is transmitted into white light with LED chip 1.
However, when intermediate region still shows whole white image and surrounding adjacent area dark images, according among this
The corresponding driving backlight illumination of the full white image brightness in region is 100%, it may be assumed that driving LED chip 1 is 100% power that shines, meanwhile,
LED chip 2 and 3 item luminous power is lower in surrounding adjacent area, in this way, adjacent from surrounding in intermediate region white light composition
The green light and feux rouges of reflection are reduced, and also result in the partially blue phenomenon in intermediate region, and to green light and feux rouges after the generation of LED chip 1
Ingredient is more, so that inclined yellow in surrounding adjacent area.For another example: intermediate image brightness is lower, surrounding adjacent area brightness of image
When higher, the brightness of 1 light emission luminance of the LED chip LED chip 2 and 3 adjacent lower than surrounding, in this way, intermediate region white backlight
To green light and reflection to red light, into intermediate region, ingredient is on the high side after the excitation of surrounding adjacent LED chip 2 and 3 in composition, causes
Intermediate region shows that image is biased to yellow, and the backward green light and feux rouges in surrounding brighter areas from LED chip are less, cause
The brighter display area of surrounding is partially blue.
The basic principle of the liquid crystal display of dynamic backlight control is to control corresponding back according to sectional image brightness size
The brightness of backlight in light subregion, each subregion back light source brightness is according to the random variation of picture material brightness.It is above-mentioned to analyze
Know, which is that LED chip light emission luminance region bigger than normal is partially blue, the inclined yellow in light emission luminance region less than normal, in order to solve
The problem of random local colour cast should be caused with backlight illumination difference, inventor considers a solution first, passes through drop
Low LED power differences method reduces partially blue problem, this is obviously contradictory with the basic principle of dynamic backlight control technology.Cause
This, if taking the backlight of quantum dot film necessarily to cause to show image randomness part colour cast problem, to those skilled in the art
For member, how to solve the backlight illumination difference bring randomness part colour cast problem is that it faces a technical problem.
Based on the analytic process that foregoing invention people makes the creative labor, in the liquid crystal of dynamic partition backlight control techniques
Show in equipment, the light-source brightness of each backlight subarea is the overall ash by showing image in the corresponding display subregion in the backlight subarea
What rank brightness value determined, gray-scale intensity is higher, and the back light source brightness for driving the backlight subarea is higher, backlight in the subregion
BLUE LED emissions chip excites quantum dot generates in quantum dot film the backward light of green and red backward light more, to adjacent area
Color composition influence it is bigger.Thinking based on above-mentioned analysis, proposition a solution that inventor makes the creative labor,
By statisticalling analyze image gray-scale level brightness in each display subregion, each picture of the subregion is compensated according to the gray-scale intensity measures of dispersion
Plain voltage value, by compensate pixel voltage value in the display subregion make up backlight colour cast bring display image color cast problem, solved
The certainly randomness local display picture colour cast problem.
Fig. 9 is the pixel voltage collocation structure schematic diagram of liquid crystal display in the present invention, as shown in figure 9, timing control
Device (TOCN) receives external input RGB display image data, extracted clock signal and viewdata signal, wherein timing letter
It number is respectively supplied to data drive circuit and gate driving circuit, realizes cogradient matrix scanning, and viewdata signal is supplied to
It is pixel voltage value D that data drive circuit, which carries out digital-to-analogue conversion,1-Dm, pixel voltage value D1-DmIt is respectively used to driving liquid crystal picture
TFT data electrode in plain unit determines each point of compensation according to image gray-scale level luminance difference in each adjacent sectors in the present invention
Each sub-pixel R(is red in area), G(green) and B(it is blue) pixel voltage value, to make up white light in each backlight subarea
Source colour cast problem.Specifically, being determined according to difference between the backlight value of target backlight subarea and the backlight value of other backlight subareas
Compensate the pixel voltage value of each sub-pixel in each subregion.
It is exemplary, as shown in figure 9, image gray-scale level brightness value is bright greater than surrounding display sectional image grayscale in display subregion 1
When spending, due to corresponding in the display subregion 1, red and green is backward in surrounding backlight subarea in backlight in backlight subarea
Light, the red is low with green backward light ratio when being less than surrounding display sectional image gray-scale intensity than its image gray-scale level brightness,
At this point it is possible to pass through the pixel voltage value D for improving 1 sub-pixel R of the display subregion in proportion1With the pixel voltage of sub-pixel G
Value D2,The pixel voltage value D of reduction sub-pixel B can also be passed through3, shown with making up the inconsistent colour cast bring of backlight colour mixture
Content colour cast problem.
Wherein, surrounding display sectional image gray-scale intensity is that all backlight subareas of surrounding are bright to the backlight of the display subregion 1
The weighted value that degree influences determines.Such as: surrounding display sectional image gray-scale intensity is the gray-scale intensity values of each subregion of surrounding and adds
The weight coefficient sum of products, and weighting coefficient shows that the distance of subregion determines by each subregion distance objective, apart from remoter
It is smaller to show that subregion influences target partition, weighting coefficient is smaller.In practical application, which can first pass through survey in advance
The laboratory facilities that measuring each subregion influences amplitude to target partition brightness obtain, can also be by determining apart from size relationship
The weighted value.
The liquid crystal of the subregion backlight independent control in white backlight source is generated using monochromatic luminescence chip excitation quantum dot film
Show in equipment, by showing that the gray-scale intensity of image generates control signal to control backlight in the backlight subarea in each display subregion
Source brightness, in this way, the higher backlight subarea back light source brightness of image gray-scale level brightness is also higher in display subregion, therefore, each back
Backlight illumination size changes at random in light subregion, causes to divide in backlight light mixing from surrounding backlight in each backlight subarea
Backward light and the backlight subarea forward light ratio also can be different in area, and due to light mixing only red and green in backward light, and
Redgreenblue light mixng proportion is then determining in forward light, mixes white light with backward light by forward light and is difficult to reach white
Color consistency.
The present invention to solve the above-mentioned problems, take in proportion adjustment display subregion sub-pixel R pixel voltage value and
The pixel voltage value of sub-pixel G, alternatively, the pixel voltage value of adjustment sub-pixel B, reduce after this to light white light colour mixture accounting not
With influence, wherein Such analysis it is found that due to backward light in white light mixing composition proportion by the subregion backlight illumination and week
It encloses measures of dispersion between backlight subarea to determine, therefore, red son in the display subregion is adjusted according to the backlight illumination measures of dispersion size
The voltage value of the pixel voltage value or blue subpixels of pixel and green sub-pixels causes display colour cast to light after can making up
Problem.
Embodiment one
The embodiment of the present invention provides a kind of image processing method and applies in liquid crystal display, in the liquid crystal display
Backlight is provided using technology of quantum dots, exemplary, if Fig. 4 is a kind of liquid crystal display in this implementation, which is set
The back encapsulating structure 701 of backlight module is arranged in the standby back light provided for down straight aphototropism mode set, multiple point light sources 200
On 704 inner surface of bottom plate of (such as: on backboard), point light source 200 can be located at more with blue LED lamp, quanta point material encapsulation part 702
The light direction of a point light source 200, in order to which quanta point material heat-proof quality needs and multiple point light sources 200 shine abundant light mixing
It is required that certain heat-insulated gap and light mixing distance will be kept between quanta point material encapsulation part 702 and multiple point light sources 200,
In, after multiple point light sources 200 issue excitation light (such as: blue light) by abundant light mixing, form uniform excitation area source.
Then, which forms mixed light by excitation light to motivate the quanta point material on light direction to generate
And/or the excitation light of transmission forms white light source, which is encapsulated in quanta point material encapsulation part 702, wherein
Quanta point material encapsulation part 702, which can be, encapsulates quantum dot composition in diffuser plate, can be by encapsulating quantum dot group in optical diaphragm
At can also other encapsulating optical structures.When exciting quantum dot encapsulation part 702 respectively due to multiple point light sources 200 sending excitation light,
It is backward by excitation light (such as: backward green light and feux rouges) to have that excitation quantum dot can generate respectively for each point light source, to being swashed after this
The optics composition of adjacent area white light can be constituted by encouraging light, and power necessarily affects adjacent area white colours, in order to reduce phase between it
It mutually influences, it is desirable to reduce the influence after this to light to adjacent area.
In the liquid crystal display for taking subregion backlight dynamic control technology, need to show according to backlight zoning ordinance
The gray-scale intensity for showing image frame subregion statistical picture picture is converted by gray-scale intensity values in the display image frame subregion
For the driving signal for driving backlight, it may be assumed that the display image frame subregion is averaged the higher conversion backlight drive signal of gray-scale intensity
Drive the brightness of backlight in the backlight subarea also bigger.
It is noted that those of ordinary skill in the art can be generated in quanta point material encapsulation part 702 by configuring
The quantity of the quantum dot of feux rouges, green light and blue light, can be generated white light, so that backlight illumination is mutually sympathized in each backlight subarea
Under condition, pure white light source can be formed.In order to solve the brightness of the different backlight subareas in the dynamic control of subregion backlight with
When showing sectional image content brightness change, local colour cast problem in display subregion is produced, liquid crystal display is set in the present embodiment
It further include a kind of image processing apparatus in standby, which can be one or more video frequency processing chips, can be
Part of functions in video frequency processing chip.If Fig. 8 is a kind of image processing apparatus schematic diagram, which includes: acquiring unit
101 and compensating unit 102.
A kind of image processing method is executed in the image processing apparatus, also provides a kind of image processing method in the present embodiment
Method, if Fig. 5 is that this implementation one provides a kind of flow diagram of image processing method, acquiring unit 101 executes image processing method
Step 101 program and compensating unit 102 execute step 102 program in image processing method in method.
Step 101, obtain backlight value in each backlight subarea according to the gray-scale intensity values of display image, the backlight value to
Back light source brightness in each backlight subarea is operated alone.Wherein, backlight can single or multiple points in each backlight subarea
Light source forms, the point light source such as LED luminescence chip, and the brightness of back light individually controls its brightness in each backlight subarea, should
Back light source brightness size is determined by mapping display sectional image gray-scale intensity in the backlight subarea in backlight subarea.
Exemplary, CPU handles chip and receives inputted video image signal, which handles chip according to scheduled image point
Area's rule, acquires in the video signal gray-scale intensity values in each image part area respectively, the gray-scale intensity can with average value,
Or average weighted value, then the gray-scale intensity values collected are exported to backlight processing unit, the backlight processing unit is bright by grayscale
Angle value is converted to backlight control signal, controls the brightness of all point light sources in the backlight subarea to control backlight drive portion, shows
Example, may include single or multiple point light sources in a backlight subarea, such as LED luminescence chip, if image is drawn in the subregion
The face brightness the high, drives in the backlight subarea and motivates the brightness of point light source higher, if image frame brightness in the subregion is lower
Driving in the subregion backlight motivates point light source brightness lower, on the other hand it is also possible that the specification according to predetermined display panel will be schemed
As signal progress format transformation, output sequence controller (TCON) into liquid-crystal display section produces timing through sequence controller
Control signal and data signal is to drive liquid crystal display panel.
It should be noted that gray-scale intensity values can carry out YUV color sky by red grayscale value, green grayscale value and blue grayscale value
Between be converted to intensity gray scale value Y-component.Exemplary, cpu chip receives image video signal progress in liquid crystal display
Decoding obtains rgb signal, then passes through low-voltage differential signal (full name in English: Low-Voltage Differential
Signaling, English abbreviation: LVDS) be transferred to video processnig algorithms chip, the video frequency processing chip first to the rgb signal into
Row YUV signal is converted to luminance component Y value in each pixel, which advises according to predetermined display subregion
The luma component values of each pixel in each display subregion are then counted, luma component values carry out pre-defined algorithm turn in the display subregion
It is changed to the backlight value of the backlight subarea, then, the backlight value of the backlight subarea is to drive back light source brightness in the backlight subarea.
To those skilled in the art, the algorithm for luminance component being converted to the subregion backlight value is very more, and details are not described herein.
Gray-scale intensity values are also possible that the sum of the grayscale value for obtaining all red pixels in each display subregion, according to display point
The sum of grayscale value of all red pixels obtains the average gray-scale value of all red pixels in display subregion in area, then obtains display subregion
In all red pixels average gray-scale value and display subregion in all red pixels maximum gray value weighted average, shown
Show the red grayscale value of subregion.Similarly, then each display subregion Green grayscale value and blue grayscale value are obtained, by display subregion
Red grayscale, green grayscale value and blue grayscale value are converted to intensity gray scale value in the subregion, are converted by the intensity gray scale value
For the backlight value of the backlight subarea.
It should be noted that display subregion can be according to backlight subarea division, backlight subarea be can be according to backlight
What source divided, wherein the backlight each individually controlled is a backlight subarea, and display subregion and backlight subarea are usually a pair
One is mutual corresponding.Optionally, display subregion can also be the image division shown according to practical liquid crystal display, then often
The corresponding backlight portion region of a display subregion is exactly backlight subarea.Each backlight subarea may include a backlight point light source
It may include multiple backlight point light sources, for example single led luminescence chip of point light source.
It is exemplary, it is assumed that liquid crystal display includes 9 display subregions and 9 backlight subareas, shows subregion and backlight subarea
One-to-one reciprocal correspondence.If Fig. 6 is the division schematic diagram for showing screen display subregion in liquid crystal display, such as by display area
It is divided into 9 regions, including display subregion 1, display subregion 2, display subregion 3, display subregion 4, display subregion 5, display subregion
6, display subregion 7, display subregion 8 and display subregion 9, in this way, such as the backlight subarea that Fig. 7 is division corresponding with Fig. 6 display subregion
Schematic diagram, corresponding backlight are also divided into 9 subregions, comprising: backlight subarea 1, backlight subarea 2, backlight subarea 3, backlight subarea
4, backlight subarea 5, backlight subarea 6, backlight subarea 7, backlight subarea 8 and backlight subarea 9.Backlight value is by showing in backlight subarea 1
Gray-scale intensity values convert in subregion 1, such as: gray-scale intensity values are 255 grayscale, backlight in backlight subarea 1 in the display subregion 1
Value is 255, can be converted to PWM backlight control signal or current controling signal by 255 to control the brightness of backlight, can also incite somebody to action
Gray-scale intensity values 255 obtain backlight value through further transfer algorithm, and backlight value is converted to PWM backlight control signal after it will convert
Or current controling signal is to control the brightness of backlight.
Step 102 compares according between the backlight value of target backlight subarea and the backlight value weighted mean of other backlight subareas
Compared with as a result, compensating the color range numerical value of the corresponding display subregion sub-pixel display data in the target backlight subarea.
According to shown after the compensation data carry out grayscale be converted into pixel voltage value to drive every height picture on display panel
TFT data electrode in plain unit influences to show image color cast problem to make up each display subregion backlight colour cast.
Specifically, when backlight value is greater than the backlight value weighted mean of other backlight subareas in target backlight subarea, it can be with
The color range numerical value for improving all red and green sub-pixels display data in the corresponding display subregion in the target backlight subarea, can also
To reduce the color range numerical value that the target shows all blue subpixels display data in subregion.
Likewise, when backlight value is less than the backlight value weighted mean of other backlight subareas in target backlight subarea, it can be with
The color range numerical value for reducing the display data of all blue subpixels in the corresponding display subregion in the target backlight subarea, can also be improved
The target shows the color range numerical value of all red and green sub-pixels display data in subregion.
When the color range for the display data for compensating red and green sub-pixels in the corresponding display subregion in the target backlight subarea
When numerical value, the compensating proportion amplitude phase of the color range numerical value of all red and green sub-pixels display data in the display subregion
Together, when compensating the color range numerical value of display data of the blue subpixels in the corresponding display subregion in the target backlight subarea, this is aobvious
Show that the compensating proportion amplitude of the color range numerical value of the display data of all blue subpixels in subregion is identical.
Wherein, according to ratio between the backlight value of target backlight subarea and the backlight value weighted mean of other backlight subareas,
The color range numerical value that the corresponding display subregion sub-pixel in the target backlight subarea shows data is compensated according to the ratio.
Exemplary: the backlight value of target backlight subarea 5 is 255, and backlight value weighted mean is 200 in other backlight subareas,
In this way, the difference of the backlight value weighted mean of backlight subarea 5 and other backlight subareas is 55, it is all red in compensation display subregion 5
The show value of color and green sub-pixels, specific compensation magnitude value can preset data table and by lookup table mode obtain, can also be with it
He obtains calculation, and those skilled in the art are in design, from adjacent sectors in specific backlight subarea after needing to consider
Reflection light ratio specifically determines calculation formula.Such as: when difference is 55/255, and it is 10% that adjacent sectors backlight, which influences coefficient,
Compensating amplitude is (55/255) * 10%=2.1%, in this way, all red and green sub-pixels display data in the display subregion 5
Color range numerical value promote 2.1% in proportion.
In addition it is also possible to by preset two-dimensional data table, according to the backlight value of target backlight subarea and other backlight subareas
Backlight value weighted mean carry out lookup table mode, determine that corresponding sub-pixel in the target partition shows the benefit of the color range numerical value of data
Amplitude is repaid, according to the color range numerical value for determining corresponding sub-pixel display data in compensation amplitude compensation target partition.
It illustrates, the backlight value weighted mean of other backlight subareas is whole or portion in addition to target backlight subarea
The backlight value of backlight subarea is divided to determine multiplied by corresponding weighting coefficient.Exemplary, backlight subarea 1 is target partition, other back
Light subregion is backlight subarea 2, backlight subarea 3, backlight subarea 4, backlight subarea 5, backlight subarea 6, backlight subarea 7, backlight subarea 8
With backlight subarea 9, in fact, if it is considered that far from backlight subarea 1 other backlight subareas 3, backlight subarea 6, backlight subarea
7, backlight subarea 8 and backlight subarea 9 influence backlight subarea 1 very small, can in the backlight value weighted mean of other backlight subareas
Not include other backlight subareas far from backlight subarea 1.It is further continued for explanation, the weighting coefficient of corresponding backlight subarea is
Target backlight subarea brightness contribution size is determined by its backlight illumination, wherein the backlight point further away from target backlight subarea
The weighting coefficient in area is smaller.
Specifically, the backlight value weighting coefficient acquisition methods of other backlight subareas except the target backlight subarea are obtained, this
Field technical staff can obtain according to experiment method, such as: backlight subarea 1 is target backlight subarea, can be by closing or opening
The brightness change situation of backlight subarea 1 when opening 2 mode of backlight subarea obtains backlight subarea 2 and contributes 1 backlight illumination of backlight subarea
It is small to obtain weighting coefficient greatly, likewise, obtaining the weighting coefficient of other backlight subareas.Then, using each backlight subarea as
Target backlight subarea obtains the weighting coefficient of other backlight subareas respectively, obtains pre-stored target backlight point with lookup table mode
The weighting coefficient of other backlight subareas except area, then the backlight value weighted mean of other backlight subareas is calculated.It can also root
The weighting coefficient is determined according to target backlight value and other backlight subarea distance parameters, wherein the remoter backlight subarea of distance is to mesh
The brightness influence for marking backlight subarea is smaller, and weighting coefficient is also smaller.
In the present embodiment, backlight value in each backlight subarea is obtained according to the gray-scale intensity values of display image, according to target
Comparison result between the backlight value of backlight subarea and the backlight value weighted mean of other backlight subareas compensates the target backlight subarea
Corresponding display subregion sub-pixel shows the color range numerical value of data, this shows the pixel electricity of the color range numerical value conversion of data after making up
Pressure is to drive pixel to show, due to showing that image gray-scale level luminance difference brings backlight illumination difference, backlight in each display subregion
Luminance difference brings local colour cast problem in the display subregion, and determines the regularity of difference and colour cast between backlight illumination, leads to
Overcompensation shows that image sub-pixel shows the color range numerical value of data to mitigate colour cast phenomenon.
Embodiment two:
The present embodiment two provides a kind of liquid crystal display, and the liquid crystal display is as shown in figure 4, be downward back optical mode
The back light that group provides, the back encapsulating structure 701(of backlight module is arranged in such as in multiple point light sources 200: on backboard) bottom
On 704 inner surface of plate, point light source 200 can be located at going out for multiple point light sources 200 with blue LED lamp, quanta point material encapsulation part 702
Light direction will be in quantum dot in order to which quanta point material heat-proof quality needs and multiple point light sources 200 shine abundant light mixing requirement
Certain heat-insulated gap and light mixing distance are kept between material package portion 702 and multiple point light sources 200, wherein multiple point light sources 200
After excitation light (such as: blue light) is issued by abundant light mixing, uniform excitation area source is formed.
Then, which forms mixed light by excitation light to motivate the quanta point material on light direction to generate
And/or the excitation light of transmission forms white light source, which is encapsulated in quanta point material encapsulation part 702, wherein
Quanta point material encapsulation part 702, which can be, encapsulates quantum dot composition in diffuser plate, can be by encapsulating quantum dot group in optical diaphragm
At can also other encapsulating optical structures.The liquid crystal display takes the liquid crystal display of subregion backlight dynamic control technology to set
In standby, need to show the gray-scale intensity of image frame subregion statistical picture picture according to backlight zoning ordinance, by the display
Gray-scale intensity values carry out the driving signal for being converted into driving backlight in image frame subregion, it may be assumed that the display image frame subregion
The average higher conversion backlight drive signal of gray-scale intensity drives the brightness of backlight in the backlight subarea also bigger.
As aforementioned it is found that in order to determine that compensate each subregion sub-pixel R(red), G(green) and B(it is blue) pixel
Voltage value, as shown in Figure 10, the liquid crystal display include: image processing part, are obtained according to the gray-scale intensity values of display image
Take backlight value in each backlight subarea, backlight comparing section, according to the backlight value of target backlight subarea and other backlight subareas
Backlight value weighted mean is compared, reference voltage generating unit, and being determined according to the backlight value comparison result of backlight comparing section should
The color range numerical value of the corresponding display subregion sub-pixel in target backlight subarea carries out the reference voltage of digital-to-analogue conversion, aobvious to compensate target
Show that each sub-pixel R(is red in subregion), G(green) and B(it is blue) pixel voltage value.
In prior art, digital analog converter is simulation letter to the color range numerical value conversion that redgreenblue is shown to data
Number, by respective data lines each on liquid crystal display panel, it is applied respectively to the pixel voltage of each display pixel cells,
In, it is not homochromy to make the color range value for showing data and passing through subjective reflection display image consistency on application electric field liquid crystal cells
Rank is worth corresponding conversion reference data voltage difference, identical to realize as reference data voltage corresponding relationship by adjusting color range correspondence
Color range data reflect close display image by different liquid crystal, it may be assumed that adjustment gamma curve.Wherein, in order to more preferably show effect
Fruit, each color sub-pixel respectively correspond a gamma curve, which includes that different color range data respectively correspond difference
Reference voltage value.Therefore, in prior art, in order to objectively respond display image consistency, phase in the sub-pixel of same color
With the corresponding reference voltage of color range it is identical, that is to say, that only one gamma curve of same color sub-pixel, the gamma curve
Reflect that different color range values correspond to different reference voltage values, it may be assumed that an a kind of color range value of color sub-pixels is in a corresponding benchmark
Voltage value.
In order to solve to impact to adjacent backlight subarea backlight color due to backward red and green light, surrounding phase
Backward red and green light size will cause red, green and blue coloured light proportion in the white light of target backlight subarea and lose in neighbouring region
It adjusts, so that the uncontrolled and easy colour cast problem of target backlight subarea backlight color, in the present embodiment two, according to target backlight subarea
Backlight value is compared with the backlight value weighted mean of other backlight subareas, and the color range of each display data is determined by comparison result
It is worth corresponding reference voltage value, it may be assumed that when the mutually same color range value for showing data in same color sub-pixel, due in different back
Different comparison results are generated under brightness, also can determine whether different reference voltage values, which makes up rear Xiang Hong
Color and green light will cause red, green and blue coloured light in the white light of target backlight subarea and match variation issue.
Specifically, the backlight value weighted mean acquisition methods and reality of the backlight value of target backlight subarea and other backlight subareas
Apply that example one is identical, and details are not described herein.
In this implementation two, due to showing data in same color sub-pixel with color stage value, according to target backlight subarea
Backlight value can determine the reference voltage of different digital-to-analogue conversions, meeting from the backlight value weighted mean comparison result of other backlight subareas
Different pixels voltage value is converted to drive on display panel TFT data electrode in corresponding sub-pixel unit, it is aobvious to make up target
Show that subregion shows image colour cast problem due to backlight colour cast bring.
It further illustrates, when backlight value is greater than the backlight value weighted mean of other backlight subareas in target backlight subarea
When, it can determine the benchmark of all red and green sub-pixels digital-to-analogue conversions in corresponding display subregion in the target backlight subarea
Voltage makes it improve all red and green sub-pixels pixel voltage values in the display subregion, can also determine that the target is carried on the back
The corresponding reference voltage for showing the digital-to-analogue conversion of all blue subpixels in subregion, reduces it in display subregion in light subregion
The pixel voltage value of all blue subpixels.
When backlight value is less than the backlight value weighted mean of other backlight subareas in target backlight subarea, the mesh can be determined
The reference voltage of all red and green sub-pixels digital-to-analogue conversions in corresponding display subregion in backlight subarea is marked, reducing it should
It shows all red and green sub-pixels pixel voltage values in subregion, can also determine corresponding display in the target backlight subarea
The reference voltage of the digital-to-analogue conversion of all blue subpixels in subregion makes it improve all blue subpixels in the display subregion
Pixel voltage value.
Wherein, when the target is shown in subregion, needs all red and green sub-pixels pixel voltage values, own
It is red identical with green sub-pixels adjustment ratio amplitude, likewise, when needing the pixel voltage value of all blue subpixels, institute
There is blue subpixels adjustment ratio amplitude also identical.
It can also be by preset two-dimensional data table, according to the backlight of the backlight value of target backlight subarea and other backlight subareas
It is worth weighted mean and carries out lookup table mode, determines the benchmark of the color range numerical value conversion of corresponding sub-pixel display data in the target partition
Voltage value, wherein reference needs compensation magnitude to be arranged in the preset two-dimensional data table.Wherein, which can pass through
Experimental method influences the backlight illumination of target backlight subarea to red and green light after counting the generation of surrounding backlight subarea
Degree determines.It can also compare according between the backlight value of target backlight subarea and the backlight value weighted mean of other backlight subareas
Value, and surrounding other backlight subarea backlight illuminations correspond to target backlight subarea influence degree and determine the compensation magnitude.
Exemplary, Figure 11 is reference voltage generating unit outputting reference voltage value schematic diagram in the present embodiment two, as shown,
Export the different reference voltage values of V0~Vm m, wherein backlight comparing section generates the backlight value and other back of target backlight subarea
The comparison result of the backlight value weighted mean of light subregion, reference voltage generating unit is according to the comparison result from reference voltage storage unit
The color range that middle tables of data reads display data is worth corresponding reference voltage value, and generates corresponding benchmark according to reference voltage value is read
Voltage output value digital analog converter carries out color range data conversion and generates corresponding pixel voltage.
It wherein, include multiple look-up tables in reference voltage storage unit, for according to the backlight value for storing different backlight subareas
From the corresponding different look-up tables of the backlight value weighted mean of other backlight subareas, each look-up table respectively corresponds different color range data pair
The reference voltage value answered.
It can also be different according to ratio between the backlight value of backlight subarea and the backlight value weighted mean of other backlight subareas
Different look-up tables are respectively corresponded, look-up method is arranged according to ratio will be less with respect to look-up table number.
In order to solve to be influenced adjacent backlight subarea backlight colour mixture by backward red and green light, in surrounding adjacent area after
To red and green light size as dynamic backlight control is adjusted, which be will cause after will cause to red and green
In the white light of target backlight subarea red, green and blue coloured light proportion imbalance, cause target backlight subarea backlight color uncontrolled and
Easy colour cast problem is shown in subregion according to the backlight value of target backlight subarea and other backlight subareas in target in the present embodiment two
Backlight value weighted mean be compared, according to comparison result using preset different gamma curves, determine mesh from the gamma curve
The conversion reference voltage of each sub-pixel in mark display subregion, wherein the preset gamma curve is shown in subregion respectively with compensating target
A sub-pixel R(is red), G(green) and B(it is blue) pixel voltage value, rear Xiang Guang can be made up by adjusting pixel voltage value
It brings backlight colour cast and causes display image color cast problem.
Embodiment three:
The present embodiment three provides a kind of liquid crystal display, and the liquid crystal display is as shown in figure 4, be downward back optical mode
The back light that group provides, the back encapsulating structure 701(of backlight module is arranged in such as in multiple point light sources 200: on backboard) bottom
On 704 inner surface of plate, point light source 200 can be located at going out for multiple point light sources 200 with blue LED lamp, quanta point material encapsulation part 702
Light direction will be in quantum dot in order to which quanta point material heat-proof quality needs and multiple point light sources 200 shine abundant light mixing requirement
Certain heat-insulated gap and light mixing distance are kept between material package portion 702 and multiple point light sources 200, wherein multiple point light sources 200
After excitation light (such as: blue light) is issued by abundant light mixing, uniform excitation area source is formed.
Then, which forms mixed light by excitation light to motivate the quanta point material on light direction to generate
And/or the excitation light of transmission forms white light source, which is encapsulated in quanta point material encapsulation part 702, wherein
Quanta point material encapsulation part 702, which can be, encapsulates quantum dot composition in diffuser plate, can be by encapsulating quantum dot group in optical diaphragm
At can also other encapsulating optical structures.The liquid crystal display takes the liquid crystal display of subregion backlight dynamic control technology to set
In standby, need to show the gray-scale intensity of image frame subregion statistical picture picture according to backlight zoning ordinance, by the display
Gray-scale intensity values carry out the driving signal for being converted into driving backlight in image frame subregion, it may be assumed that the display image frame subregion
The average higher conversion backlight drive signal of gray-scale intensity drives the brightness of backlight in the backlight subarea also bigger.
As aforementioned it is found that in order to determine that compensate each subregion sub-pixel R(red), G(green) and B(it is blue) pixel
Voltage value, as shown in figure 12, the liquid crystal display include: image processing part, are obtained according to the gray-scale intensity values of display image
Take backlight value in each backlight subarea, backlight comparing section, according to the backlight value of target backlight subarea and other backlight subareas
Backlight value weighted mean is compared, and is compensated control unit, is determined the target according to the backlight value comparison result of backlight comparing section
Each sub-pixel R(is red in the corresponding display subregion in backlight subarea), G(green) and B(blue) pixel voltage offset, compensate
Circuit controls the pixel voltage value of each sub-pixel in the compensation display subregion according to the pixel voltage offset is determined.
Specifically, the backlight value weighted mean acquisition methods and reality of the backlight value of target backlight subarea and other backlight subareas
Apply that example one is identical, and details are not described herein.Wherein, compensation circuit belongs to prior art scope, and those skilled in the art can be set
Specific compensation circuit.
Wherein, according to pixel voltage value after the compensation, to drive, TFT data are electric in each sub-pixel unit on display panel
Pole influences to show image color cast problem to make up each display subregion backlight colour cast.
Specifically, when backlight value is greater than the backlight value weighted mean of other backlight subareas in target backlight subarea, compensation
Control unit determines the pixel voltage offset of each sub-pixel by lookup table mode, and compensation circuit can be according to the determination offset
All red and green sub-pixels pixel voltage values in the corresponding display subregion in the target backlight subarea are improved, it can also be according to this
Determine that offset reduces the pixel voltage value that the target shows all blue subpixels in subregion.
Likewise, when backlight value is less than the backlight value weighted mean of other backlight subareas in target backlight subarea, compensation
Control unit determines the pixel voltage offset of each sub-pixel by lookup table mode, and compensation circuit can be according to the determination offset
All red and green sub-pixels pixel voltage values in the corresponding display subregion in the target backlight subarea are reduced, it can also be according to this
Determine that offset improves the pixel voltage value that the target shows all blue subpixels in subregion.
It further illustrates, compensation control unit determines the compensating proportion amplitude of the pixel voltage offset of each sub-pixel
It is identical.Specifically, when compensating the pixel voltage value of the red and green sub-pixels in target display subregion, in the display subregion
All red are identical with the compensating proportion amplitude of pixel voltage value of green sub-pixels, and when compensation, the target shows the indigo plant in subregion
When the pixel voltage value of sub-pixels, the compensating proportion amplitude phase of the pixel voltage value of all blue subpixels in the display subregion
Together.
Specifically, can also be by preset two-dimensional data table, reference needs compensation magnitude in the preset two-dimensional data table
Setting.Wherein, which can be by experimental method, to red and green light after the generation of statistics surrounding backlight subarea
The backlight illumination influence degree of target backlight subarea is determined.It can also be according to the backlight value and other backlights of target backlight subarea
Ratio between the backlight value weighted mean of subregion, and around other backlight subarea backlight illuminations correspond to the influence of target backlight subarea
Degree determines the compensation magnitude.
In order to solve to be influenced adjacent backlight subarea backlight colour mixture by backward red and green light, in surrounding adjacent area after
To red and green light size as dynamic backlight control is adjusted, which be will cause after will cause to red and green
In the white light of target backlight subarea red, green and blue coloured light proportion imbalance, cause target backlight subarea backlight color uncontrolled and
Easy colour cast problem is shown in subregion according to the backlight value of target backlight subarea and other backlight subareas in target in the present embodiment three
Backlight value weighted mean be compared, according to preset two-dimensional look-up table, determine the picture of each sub-pixel in the display subregion
Plain voltage compensation value, according to offset control compensation finally to drive the pixel of TFT data electrode in sub-pixel unit electric
Pressure value causes display image color cast problem to carry out backlight colour cast to light belt after making up.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above method embodiment can pass through
The relevant hardware of program instruction is completed, and program above-mentioned can be stored in a computer readable storage medium, the program
When being executed, step including the steps of the foregoing method embodiments is executed；And storage medium above-mentioned includes: read-only memory (Read-
Only Memory, ROM), random access memory (Random-Access Memory, RAM), magnetic or disk etc. it is various
It can store the medium of program code.
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 (4)
1. a kind of liquid crystal display using backlight subarea dynamic control, the liquid crystal display, the liquid crystal display are set
It is standby to excite encapsulation quantum dot to form white backlight by point light source, which is characterized in that further include: image processing apparatus executes following
Method and step: image gray-scale level brightness in statistics display subregion；
According to image gray-scale level luminance difference amount in display subregion subregion adjacent thereto, determines and compensate red in the display subregion
The pixel color range value of sub-pixel and green sub-pixels and/or blue subpixels；
Grayscale, which is carried out, according to color range value described after the compensation is converted into pixel voltage value to drive on display panel TFT in sub-pixel
Data electrode.
2. liquid crystal display described according to claim 1, which is characterized in that this method step includes:
It is compensated in proportion to improve the pixel voltage value that target shows red sub-pixel and green sub-pixels in subregion, alternatively, together
Proportional compensation is to reduce the pixel voltage value that target shows blue subpixels in subregion.
3. liquid crystal display described according to claim 1, which is characterized in that when target shows that grayscale value is greater than it in subregion
When his adjacent sectors, compensation is determined to improve the target and show all red and green sub-pixels pixel voltages in subregion
Value, alternatively, determining compensation to reduce the pixel voltage value that the target shows all blue subpixels in subregion.
4. liquid crystal display described according to claim 1, which is characterized in that when target shows that grayscale value is less than it in subregion
When his adjacent sectors, compensation is determined to reduce the target and show all red and green sub-pixels pixel voltages in subregion
Value, alternatively, determining compensation to improve the pixel voltage value that the target shows all blue subpixels in subregion.
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| CN106328094B (en) * | 2016-11-18 | 2019-01-08 | 厦门天马微电子有限公司 | A kind of display control method of liquid crystal display |
| CN107993624B (en) | 2017-12-21 | 2019-12-03 | 惠科股份有限公司 | Display device driving method, driving device and display device |
| CN107967899B (en) * | 2017-12-21 | 2020-03-27 | 惠科股份有限公司 | Display device driving method, driving device and display device |
| CN108269548A (en) * | 2018-02-12 | 2018-07-10 | 苏州佳世达电通有限公司 | Display device and method for controlling backlight thereof |
| CN108630148B (en) * | 2018-04-27 | 2020-06-05 | 武汉华星光电半导体显示技术有限公司 | Method for compensating brightness difference of display panel and display |
| CN108877693A (en) * | 2018-07-23 | 2018-11-23 | 东南大学 | A kind of four sequential liquid crystal display control methods |
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| CN108257562B (en) | 2019-12-27 |
| CN108257562A (en) | 2018-07-06 |
| CN108231013A (en) | 2018-06-29 |
| CN105304028A (en) | 2016-02-03 |
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