CN105304028B - 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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- CN105304028B CN105304028B CN201510902188.3A CN201510902188A CN105304028B CN 105304028 B CN105304028 B CN 105304028B CN 201510902188 A CN201510902188 A CN 201510902188A CN 105304028 B CN105304028 B CN 105304028B
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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 image processing field, backlight value in each backlight subarea is obtained according to the gray-scale intensity values of display image, according to comparative result between the backlight value of target backlight subarea and the backlight value weighted mean of other backlight subareas, compensate the target backlight subarea and correspondingly show subregion sub-pixel show value, because display image gray-scale intensity 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 compensating display image sub-pixel show value.
Description
Technical field
The present invention relates to field of liquid crystal display, more particularly to a kind of image processing method and liquid crystal display.
Background technology
Liquid crystal display (Liquid Crystal Display, abbreviation LCD) generally use dynamic backlight modulation technique
Backlight illumination is controlled, energy-conservation is can reach, is lifted and the image quality effect such as display contrast.If Fig. 1 is liquid crystal in the prior art
Showing middle dynamic backlight modulation technique principle assumption diagram, liquid crystal display device includes, and 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
Format transformation is carried out, exports into liquid-crystal display section time schedule controller（TCON）, through time schedule controller production SECO letter
Number and data-signal to drive liquid crystal panel, on the other hand, the backlight data collected is exported to backlight processing unit, the back of the body
Backlight data is converted to backlight control signal by light processing portion, to control backlight drive portion to control backlight in backlight assembly
Brightness, higher backlight illumination is driven if brightness of image height, relatively low backlight illumination is driven if brightness of image is low.
Dynamic backlight modulation technique mainly includes subregion backlight modulation and global backlight modulation.Wherein, global backlight modulation
The mean flow rate that technology gathers a two field picture content controls backlight illumination, and so, backlight intrinsic brilliance is schemed by a frame is global
As average gray-scale value determination, therefore, image averaging maximum gray value（I.e.：Complete white field picture）Corresponding driving obtains backlight maximum
Brightness, in order to protect back light functional reliability, usual backlight high-high brightness is controlled below the nominal operation brightness of backlight.
Generally in normal display picture, understood through statistics, in dynamic video picture ensemble average gray-scale intensity in 50%IRE or so, this
Sample, the average value of backlight illumination is then 50% or so of maximum backlight illumination, and therefore, backlight is real in global backlight modulation techniques
Border operation mean power is controlled in half of rated power or so, is there is obvious energy-saving effect to a certain degree.But the global back of the body
The average gray-scale intensity of a frame or the global image of continuous multiple frames that light modulation techniques collect, is controlled by the image averaging GTG
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 change is more embodied in picture material between partial picture on luminance difference, and therefore, it is to lifting display pair
Than degree image quality effect can play a role it is 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, whole backlight source matrix include the M subregion in A directions and N number of subregion in B directions, and such as figure assumes M=16, N=9, counts M*
N=144 backlight subarea, control can be operated alone in back light source brightness in each backlight subarea, wherein it is desired to which it is the backlight to illustrate
Ideally, each backlight subarea can independently illuminate its backlight area to subregion, but in fact, adjacent back light source brightness has one
It is fixing to ring.In subregion dynamic backlight modulation technique, it is divided into multiple subregions corresponding with backlight subarea per frame global image
Video data block, by gathering 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, so, the backlight
Subregion backlight illumination is determined that the change 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, display brightness difference between display image partial picture is highlighted, is carried
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.Because common phosphors LED white light source principle is by BLUE LED emissions chip emission blue light
Excite yellow fluorescent powder to produce gold-tinted with blue light into white, and be not made up of in gold-tinted pure color green glow and feux rouges, caused
Common phosphors LED white light source gamut range is not high, substantially in below 70%NTSC（English full name：National
Television Standards Committee）.In order to improve liquid crystal display gamut range, take and made using technology of quantum dots
Backlight is provided for liquid crystal display, the gamut range of backlight is up to more than 85%NTSC, even more than 100%NTSC.Show
Example, quanta point material is encapsulated among two layers of water oxygen Obstruct membrane and forms quantum dot film, then the quantum dot film is arranged on expansion
Fall apart or the top of light guide plate, green glow and feux rouges produced using quanta point material in blue light emitting chip excitation quantum point film,
And white backlight source is mixed into, to lift the gamut range in white backlight source.
But when being dynamic partition backlight control techniques using quantum membrane technology, inventor has found and common LED chip
Excitated fluorescent powder is provided unlike white backlight source, is equally used in subregion backlight technology scheme, in LED chip excitation quantum
The luminous backlight of point, each backlight subarea correspondingly show that sectional image color shows the local colour cast phenomenon of randomness, and
This local colour cast regularity is poor.Such as：When intermediate region shows as white, and surrounding is inclined to blueness, inventor
Solve the partially blue problem in edge, reduce blue luminescence chip power, i.e.,：Lower the composition of blue light, so, can solve surrounding
The blueness in edge region, however, yellow is but inclined in intermediate region, i.e.,：Intermediate region green glow 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
Each display inconsistent reason of subregion color in standby, and solve the problems, such as each subregion colour consistency, turn into and need solution badly
Certainly technical barrier.
The content 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, its display picture part colour cast problem.
To reach above-mentioned purpose, a kind of liquid crystal display, backlight are provided in the technical scheme that the embodiment of the present invention uses
Comparing section, according to the backlight value of target backlight subarea compared with the backlight value of other backlight subareas of surrounding；Compensate control unit,
Determine that the target shows the pixel voltage offset of each sub-pixel in subregion according to backlight value comparative result；Compensation circuit,
The pixel voltage value for compensating the target and showing each sub-pixel in subregion is controlled according to the pixel voltage offset is determined.
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 comparative result
Voltage compensation value；The compensation target is controlled to show each sub-pixel in subregion according to the pixel voltage offset is determined
Pixel voltage value, make up backward light belt and carry out backlight colour cast and cause display image colour cast problem..
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 provides a kind of liquid crystal display for prior art and shows complete white picture view；
Fig. 2 provides a kind of liquid crystal display for prior art and shows full the display subregion light schematic diagram of picture in vain；
Fig. 3 is the schematic diagram of liquid crystal display colour cast causation analysis one；
Fig. 4 is a kind of liquid crystal display in this implementation；
Fig. 5 is that this implementation one provides a kind of schematic flow sheet 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 subregions；
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 representation of liquid crystal display；
Figure 11 is reference voltage generating unit output reference voltage value schematic diagram in the present embodiment two；
Figure 12 is that the present embodiment three provides a kind of structural representation of liquid crystal display.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
In the liquid crystal display of dynamic partition backlight control techniques of backlight is provided using quantum dot membrane technology, it is
Solve in the liquid crystal display that the inconsistent technical barrier of local color, inventor are preliminary in each subregion in viewing area
Think, be quantum dot in quantum dot film due to occurring colour cast problem immediate cause under the power same case of blue-light source
Caused by material mixture ratio is uneven, i.e.,：If intermediate region is for pure white and during blue peripheral regions deviation, necessarily quantum dot
The quanta point material proportioning of film intermediate region is matched preferably with blue ray, and quanta point material is matched somebody with somebody in peripheral regions quantum dot film
Than relatively low, cause peripheral regions blue ray composition on the high side and cause peripheral regions partially blue, therefore, inventor continues amount of analysis
The proportioning of the quanta point material in each region finds that quanta point material proportioning is highly uniform in quantum dot film, does not deposit in son point film
In above mentioned problem.
As described above in local colour cast phenomenon, intermediate region is for pure white and during blue peripheral regions deviation, at the beginning of inventor
The reason for step thinks the phenomenon should have relation with viewing area position.Inventor continues analysis and learnt, is measured when in quantum dot film
Son point material mixture ratio is uniform and each backlight subarea in blue luminescence chip power also in the case of identical, if Fig. 3 is liquid crystal
Show the schematic diagram of equipment colour cast causation analysis one, as shown in figure 3, white light source sends blue light booster dose by LED luminescence chips
Son puts quanta point material in film and sends green glow and feux rouges and be uniformly mixed into white light with the blue light transmitted through quantum dot film.However,
When showing that whole white image and surrounding adjacent area display that whole white image in intermediate region, 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 chips excitation quantum point material and between caused forward direction green glow G0 and forward direction feux rouges R0 and the blue light of transmission mixed light and
Into another part excites for the adjacent blue-ray LED luminescence chip of surrounding produces backward green glow G1 and backward feux rouges R1 through reflection
Blue light mixed light forms after to intermediate region and intermediate region blue-ray LED luminescence chip transmission quantum film, this two parts green glow and red
When light is with transmiting blue light into white, however, reflection green glow and feux rouges can be received in the region of edge with respect to middle area
Domain will be lacked, and the blue light ingredient of transmission is identical with intermediate region, therefore, blue light in white light composition after the mixed light of edge region
Composition 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 relatively low when, find that intermediate region is also partially blue again, and the partially blue phenomenon of peripheral regions weakens,
Therefore, inventor has found colour cast phenomenon with viewing area position without direct relation.
Inventor finally just has found the regularity of above-mentioned local colour cast, colour cast master after a large amount of analyses and Experimental comparison
There is direct relation with LED luminosity difference in adjacent backlight subarea, if image display brightness is identical in each subregion,
Local colour cast phenomenon is not had.When display brightness difference be present in adjacent each subregion, i.e.,：The liquid crystal of dynamic partition backlight control
The backlight illumination of each adjacent backlight subarea is different in display device, can produce the colour cast phenomenon of adjacent display subregion.Inventor
Colour cast reason is found based on the above-mentioned further analysis of colour cast rule, as shown in figure 3, working as intermediate region and adjacent area display image
Brightness is identical, i.e.,：Corresponding backlight illumination is also identical, and white backlight composition in intermediate region includes, and a part of LED chip 1 is luminous
Excite intermediate region quantum dot to produce green glow and red and be mixed into white light with transmitting blue, another part is what LED chip 1 transmitted
LED chip 2 and LED chip 3 light the backward light of green caused by excitation quantum point and the backward light of red in blue light and adjacent area
Blue light is transmitted into white light with LED chip 1.However, when intermediate region still shows whole white image and surrounding adjacent area
During dark images, it is 100% correspondingly to drive backlight illumination according to the full white image brightness of the intermediate region, i.e.,：Drive LED chip 1
For light 100% power, meanwhile, LED chip 2 and 3 luminous powers are relatively low in surrounding adjacent area, so, intermediate region white
Green glow from surrounding neighboring reflection and feux rouges are reduced in light composition, also result in the partially blue phenomenon in intermediate region, and LED chip
The backward green glow of 1 generation and red color light component are more so that inclined yellow in surrounding adjacent area.For another example：Intermediate image brightness is relatively low, and four
When all adjacent area brightness of image is higher, the brightness of the luminosity of LED chip 1 LED chip 2 and 3 adjacent less than surrounding, this
Sample, from surrounding adjacent LED chip 2 and 3 backward green glow and reflection to red light is excited to centre in intermediate region white backlight composition
Composition is on the high side in region, causes intermediate region display image deviation yellow, and from the backward of LED chip in surrounding brighter areas
Green glow and feux rouges are less, cause the brighter viewing area of surrounding partially blue.
The general principle for the liquid crystal display that dynamic backlight controls is to control the corresponding back of the body according to sectional image brightness size
The brightness of backlight in light subregion, each subregion back light source brightness is according to the random change of picture material brightness.It is above-mentioned to analyze
Know, the rule is that LED chip luminosity region bigger than normal is partially blue, the inclined yellow in luminosity 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, and this is obviously contradiction with the general principle of dynamic backlight control technology.Cause
This, necessarily causes display image randomness part colour cast problem, to people in the art if taking the backlight of quantum dot film
For member, how to solve the randomness part colour cast problem that the backlight illumination difference is brought is that it faces a technical barrier.
The analysis process of creative work is paid based on foregoing invention people, 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 that display image in subregion is shown as corresponding to the backlight subarea
What rank brightness value determined, the back light source brightness of the higher driving backlight subarea of its gray-scale intensity is higher, backlight in the subregion
The backward light of green caused by quantum dot and red backward light are more in BLUE LED emissions chip excitation quantum point film, to adjacent area
Color composition influence it is bigger.Based on above-mentioned analytical mathematics, inventor pays proposition a solution of creative work,
By image gray-scale level brightness in each display subregion of statistical analysis, each picture of the subregion is compensated according to the gray-scale intensity measures of dispersion
Plain magnitude of voltage, backlight colour cast is made up by compensating pixel voltage value in the display subregion and brings display image colour cast problem, has been 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, SECO
Device（TOCN）Reception outside input RGB display image datas, extracted clock signal and viewdata signal, wherein, sequential letter
Number data drive circuit and gate driving circuit are respectively supplied to, realize that cogradient matrix scans, 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 drive liquid crystal picture
TFT data electrodes in plain unit, according to image gray-scale level luminance difference in each adjacent sectors in the present invention, it is determined that each point of compensation
Each sub-pixel R in area（It is red）、G（Green）And B（Blueness）Pixel voltage value, to make up white light in each backlight subarea
Source colour cast problem.Specifically, according to difference between the backlight value of target backlight subarea and the backlight value of other backlight subareas, it is determined that
Compensate the pixel voltage value of each sub-pixel in each subregion.
Example, as shown in figure 9, image gray-scale level brightness value shows that sectional image GTG is bright more than surrounding in display subregion 1
When spending, due to being corresponded in the display subregion 1, red and green is backward in surrounding backlight subarea in backlight in backlight subarea
Light, being less than red when surrounding shows sectional image gray-scale intensity than its image gray-scale level brightness, light ratio is low backward with green,
At this point it is possible to the pixel voltage value D by improving the display subregion 1 sub-pixel R in proportion1With sub-pixel G pixel voltage
Value D2,Can also be by reducing sub-pixel B pixel voltage value D3, to make up the display that the inconsistent colour cast of backlight colour mixture is brought
Content colour cast problem.
Wherein, surrounding shows that 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 shows gray-scale intensity values of the sectional image gray-scale intensity for each subregion of surrounding with adding
The weight coefficient sum of products, and weight coefficient shows what the distance of subregion determined by each subregion distance objective, distance is more remote
It is smaller to show that subregion influences on target partition, its weight coefficient is smaller.In practical application, the weight coefficient can be beforehand through survey
Each subregion is measured to obtain the laboratory facilities of target partition brightness influence amplitude, can also be by being determined apart from size relation
The weighted value.
The liquid crystal of the subregion backlight independent control in white backlight source is produced using monochromatic luminescence chip excitation quantum point film
Show in equipment, control signal is generated to control backlight in the backlight subarea by the gray-scale intensity of display image in each display subregion
Source brightness, so, show that the backlight subarea back light source brightness that image gray-scale level brightness is higher in subregion is also higher, therefore, each back of the body
Backlight illumination size changes at random in light subregion, causes in backlight mixed light from surrounding backlight to divide in each backlight subarea
Backward light also can be different from the backlight subarea forward light ratio in area, and due to only having red and green mixed light in backward light, and
Redgreenblue light mixng proportion is then to determine in forward light, and mixing white light with backward light by forward light is difficult to reach white
Color uniformity, the present invention in order to solve the above problems, take adjustment in proportion show subregion sub-pixel R pixel voltage value and
Sub-pixel G pixel voltage value, or, adjustment sub-pixel B pixel voltage value, reduce the backward light in white light colour mixture accounting not
With influence, wherein, Such analysis understand, due to backward light in white mixed light composition proportion by the subregion backlight illumination with week
Measures of dispersion determines between enclosing backlight subarea, therefore, red son in the display subregion is adjusted according to the backlight illumination measures of dispersion size
Pixel and the pixel voltage value of green sub-pixels or the magnitude of voltage of blue subpixels, backward light can be made up and cause to show colour cast
Problem.
Embodiment one
The embodiment of the present invention provides a kind of image processing method and applied in liquid crystal display, in the liquid crystal display
Backlight is provided using technology of quantum dots, example, if Fig. 4 is a kind of liquid crystal display in this implementation, the liquid crystal display sets
The standby back light provided for down straight aphototropism mode set, multiple spot lights 200 are arranged on the back encapsulating structure 701 of backlight module
（Such as：On backboard）The inner surface of bottom plate 704 on, spot light 200 can be with blue LED lamp, and quanta point material encapsulation part 702 is positioned at more
The light direction of individual spot light 200, in order to which quanta point material heat-proof quality needs and multiple spot lights 200 light abundant mixed light
It is required that certain heat-insulated gap and light mixing distance will be kept between quanta point material encapsulation part 702 and multiple spot lights 200, its
In, multiple spot lights 200 send excitation light（Such as：Blue light）After abundant mixed light, uniform excitation area source is formed.Then,
The excitation area source is to encourage quanta point material on light direction to produce to be energized light to form mixed light and/or transmission
Excitation light forms white light source, and the quanta point material is encapsulated in quanta point material encapsulation part 702, wherein, quanta point material envelope
Dress portion 702 can be that quantum dot composition is encapsulated in diffuser plate, can be formed by encapsulating quantum dot in blooming piece, but also other envelopes
Fill optical texture.When sending excitation light difference excitation quantum point encapsulation part 702 due to multiple spot lights 200, each spot light point
Do not have and be energized light backward caused by the meeting of excitation quantum point（Such as：Backward green glow and feux rouges）, this is energized light backward can form phase
The optics composition of neighbouring region white light, its power necessarily affects adjacent area white colours, is influenced each other to reduce, it is necessary to subtract between it
The few influence of the backward light to adjacent area.
Take in the liquid crystal display of subregion backlight dynamic control technology, it is necessary to will be aobvious according to backlight zoning ordinance
Show the gray-scale intensity of image frame subregion statistical picture picture, converted by gray-scale intensity values in the display image picture subregion
To drive the drive signal of backlight, i.e.,：The higher conversion backlight drive signal of the average gray-scale intensity of the display image picture subregion
Drive the brightness of backlight in the backlight subarea also bigger.
It is noted that those of ordinary skill in the art can be produced by configuring in quanta point material encapsulation part 702
The quantity of the quantum dot of feux rouges, green glow and blue light, white light can be generated, so that backlight illumination is mutually sympathized with each backlight subarea
Under condition, pure white light source can be formed.In order to solve the brightness of the different backlight subareas in subregion backlight dynamic control with
When showing sectional image content brightness change, generate local colour cast problem in display subregion, in the present embodiment liquid crystal display set
Also include a kind of image processing apparatus in standby, the image processing apparatus can be one or more video frequency processing chips, Ke Yishi
Part of functions in video frequency processing chip.If Fig. 8 is a kind of image processing apparatus schematic diagram, the device 10 includes：Acquiring unit
101 and compensating unit 102.
A kind of image processing method is performed in the image processing apparatus, a kind of image processing method is also provided in the present embodiment
Method, if Fig. 5 is that this implementation one provides a kind of schematic flow sheet of image processing method, the execution image processing method of acquiring unit 101
Step 101 program in method, and compensating unit 102 perform step 102 program in image processing 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 be with single or multiple points in each backlight subarea
Light source forms, the spot light such as LED luminescence chips, in each backlight subarea the brightness of back light individually control its brightness, should
Back light source brightness size shows what sectional image gray-scale intensity determined by being mapped in the backlight subarea in backlight subarea.
Example, CPU process chips receive inputted video image signal, and the CPU process chips are according to predetermined image point
Area's rule, gathers 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 GTG
Angle value is converted to backlight control signal, to control backlight drive portion to control the brightness of all spot lights in the backlight subarea, shows
Example, single or multiple spot lights can be included in a backlight subarea, such as LED luminescence chips, if image is drawn in the subregion
Face brightness is more high, drives and encourages the brightness of spot light higher in the backlight subarea, if image frame brightness in the subregion is relatively low
Drive and encourage spot light brightness relatively low in the subregion backlight, on the other hand it is also possible that will scheme according to the specification of predetermined display panel
As signal progress format transformation, time schedule controller is exported into liquid-crystal display section（TCON）, sequential is produced through time schedule controller
Control signal and data-signal are to drive liquid crystal panel.
It should be noted that gray-scale intensity values can be carried out YUV colors sky by red grey decision-making, green grey decision-making and blue grey decision-making
Between be converted to intensity gray scale value Y-component.Example, cpu chip receives image video signal progress in liquid crystal display
Decoding obtains rgb signal, then passes through low-voltage differential signal（English full name：Low-Voltage Differential
Signaling, English abbreviation：LVDS）Video processnig algorithms chip is transferred to, the video frequency processing chip first enters to the rgb signal
Row YUV signal is converted to luminance component Y value in each pixel, and the video processnig algorithms chip is advised 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
The backlight value of the backlight subarea is changed to, then, the backlight value of the backlight subarea is driving back light source brightness in the backlight subarea.
To those skilled in the art, it is very more that luminance component is converted to the algorithm of the subregion backlight value, will not be repeated here.
Gray-scale intensity values are also possible that the grey decision-making sum for obtaining all red pixels in each display subregion, according to display point
The grey decision-making sum of all red pixels obtains the average gray-scale value for showing all red pixels in 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 grey decision-making of subregion.Similarly, then each display subregion Green grey decision-making and blue grey decision-making are obtained, by display subregion
Red GTG, green grey decision-making and blue grey decision-making are converted to intensity gray scale value in the subregion, are changed by the intensity gray scale value
For the backlight value of the backlight subarea.
It should be noted that display subregion can be divided according to backlight subarea, backlight subarea can be according to backlight
Source division, wherein, the backlight each individually controlled is a backlight subarea, and display subregion and backlight subarea are usually a pair
One is mutually corresponding.Optionally, display subregion can also be what the image shown according to actual liquid crystal display divided, then every
Backlight portion region corresponding to individual display subregion is exactly backlight subarea.Each backlight subarea may include a backlight spot light
Multiple backlight spot lights, for example single led luminescence chip of spot light may be included.
Example, it is assumed that liquid crystal display includes 9 display subregions and 9 backlight subareas, shows subregion and backlight subarea
It is one-to-one mutually corresponding.Such as Fig. 6 to show the division schematic diagram of screen display subregion in liquid crystal display, such as by viewing 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
6th, subregion 7, display subregion 8 and display subregion 9 are shown, so, such as the backlight subarea that Fig. 7 is division corresponding with Fig. 6 display subregions
Schematic diagram, corresponding backlight are also divided into 9 subregions, including：Backlight subarea 1, backlight subarea 2, backlight subarea 3, backlight subarea
4th, 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 GTGs in the display subregion 1, backlight in backlight subarea 1
It is worth for 255, PWM backlight control signals or current controling signal can be converted to by 255 to control the brightness of backlight, also can will
Gray-scale intensity values 255 obtain backlight value through further transfer algorithm, and backlight value is converted to PWM backlight control signals after by conversion
Or current controling signal is to control the brightness of backlight.
Step 102, compare according between the backlight value of target backlight subarea and the backlight value weighted mean of other backlight subareas
Relatively result, compensate the color range numerical value that the target backlight subarea correspondingly shows subregion sub-pixel display data.
GTG is carried out according to display data after the compensation and is converted into pixel voltage value to drive on display panel per height picture
TFT data electrodes in plain unit, influence display image colour cast problem to make up each display subregion backlight colour cast.
Specifically, when backlight value is more than the backlight value weighted mean of other backlight subareas in target backlight subarea, can be with
The color range numerical value that the target backlight subarea correspondingly shows all red and green sub-pixels display datas in subregion is improved, also may be used
To reduce the color range numerical value that the target shows all blue subpixels display datas in subregion.
Likewise, when backlight value is less than the backlight value weighted mean of other backlight subareas in target backlight subarea, can be with
The color range numerical value that the target backlight subarea correspondingly shows the display data of all blue subpixels in subregion is reduced, can also be improved
The target shows the color range numerical value of all red and green sub-pixels display datas in subregion.
When the compensation target backlight subarea correspondingly shows the color range of the display data of the red and green sub-pixels in subregion
During numerical value, the compensating proportion amplitude phase of the color range numerical value of all red and green sub-pixels display datas in the display subregion
Together, when the compensation target backlight subarea correspondingly shows the color range numerical value of the display data of the blue subpixels in subregion, 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 target backlight subarea correspondingly shows subregion sub-pixel display data is compensated according to the ratio.
Example：The backlight value of target backlight subarea 5 is 255, and backlight value weighted mean is 200 in other backlight subareas,
So, the difference of backlight subarea 5 and the backlight value weighted mean of other backlight subareas is 55, and compensation shows all red in subregion 5
The show value of color and green sub-pixels, specific compensation magnitude value can preset data table and obtained by lookup table mode, can also it
He obtains calculation, and those skilled in the art are in design, it is necessary to from adjacent sectors in specific backlight subarea after considering
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%, so, all red and green sub-pixels display datas in the display subregion 5
Color range numerical value lift 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 the benefit of the color range numerical value of corresponding sub-pixel display data in the target partition
Amplitude is repaid, according to the color range numerical value for determining corresponding sub-pixel display data in the compensation amplitude compensation target partition.
Illustrate, the backlight value weighted mean of other backlight subareas is whole or portion in addition to target backlight subarea
The backlight value of point backlight subarea is multiplied by what corresponding weight coefficient determined.Example, backlight subarea 1 is target partition, other back ofs the body
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 away from backlight subarea 1 other backlight subareas 3, backlight subarea 6, backlight subarea
7th, backlight subarea 8 and backlight subarea 9 influence very small on backlight subarea 1, can in the backlight value weighted mean of other backlight subareas
With not comprising other backlight subareas away from backlight subarea 1.Explanation is further continued for, the weight 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 weight coefficient in area is smaller.
Specifically, the backlight value weight coefficient acquisition methods of other backlight subareas outside the target backlight subarea are obtained, this
Art personnel can obtain according to experiment method, such as：Backlight subarea 1 is target backlight subarea, can be by closing or opening
The brightness situation of change of backlight subarea 1 when opening 2 mode of backlight subarea, obtain backlight subarea 2 and the backlight illumination of backlight subarea 1 is contributed
It is small to obtain weight coefficient greatly, likewise, obtaining the weight coefficient of other backlight subareas.Then, using each backlight subarea as
Target backlight subarea obtains the weight coefficient of other backlight subareas respectively, and the target backlight point prestored is obtained with lookup table mode
The weight coefficient of other backlight subareas outside area, then the backlight value weighted mean of other backlight subareas is calculated.Also can root
The weight coefficient is determined according to target backlight value and other backlight subarea distance parameters, wherein, the more remote backlight subarea of distance is to mesh
The brightness influence of mark backlight subarea is smaller, and its weight 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
Comparative result between the backlight value of backlight subarea and the backlight value weighted mean of other backlight subareas, compensate the target backlight subarea
The corresponding color range numerical value for showing subregion sub-pixel display data, this makes up the pixel electricity of the color range numerical value conversion of rear display data
Pressure is to drive pixel to show, because display image gray-scale intensity 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
The color range numerical value of overcompensation display image sub-pixel display data mitigates 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, multiple spot lights 200 are arranged on the back encapsulating structure 701 of backlight module（Such as：On backboard）Bottom
On the inner surface of plate 704, spot light 200 can be located at going out for multiple spot lights 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 spot lights 200 light abundant mixed light requirement
Certain heat-insulated gap and light mixing distance are kept between material package portion 702 and multiple spot lights 200, wherein, multiple spot lights 200
Send excitation light（Such as：Blue light）After abundant mixed light, uniform excitation area source is formed.Then, the excitation area source is with sharp
Encourage the quanta point material on light direction and produce the excitation light formation white light for being energized light formation mixed light and/or transmission
Source, the quanta point material are encapsulated in quanta point material encapsulation part 702, wherein, quanta point material encapsulation part 702 can be diffusion
Quantum dot composition is encapsulated in plate, can be formed by encapsulating quantum dot in blooming piece, but also other encapsulating optical structures.The liquid crystal
Display device is taken in the liquid crystal display of subregion backlight dynamic control technology, it is necessary to will be aobvious according to backlight zoning ordinance
Show the gray-scale intensity of image frame subregion statistical picture picture, converted by gray-scale intensity values in the display image picture subregion
To drive the drive signal of backlight, i.e.,：The higher conversion backlight drive signal of the average gray-scale intensity of the display image picture subregion
Drive the brightness of backlight in the backlight subarea also bigger.
Understood as foregoing, in order to determine to compensate each subregion sub-pixel R（It is red）、G（Green）And B（Blueness）Pixel
Magnitude of voltage, as shown in Figure 10, the liquid crystal display include：Image processing part, it is obtained according to the gray-scale intensity values of display image
Take backlight value in each backlight subarea, backlight comparing section, its backlight value according to target backlight subarea and other backlight subareas
Backlight value weighted mean is compared, reference voltage generating unit, and it is determined according to the backlight value comparative result of backlight comparing section should
Target backlight subarea correspondingly shows that the color range numerical value of subregion sub-pixel carries out the reference voltage of digital-to-analogue conversion, is shown with compensating target
Show each sub-pixel R in subregion（It is red）、G（Green）And B（Blueness）Pixel voltage value.
In prior art, digital analog converter is believed the color range numerical value of redgreenblue display data is converted into simulation
Number, by each respective data lines on liquid crystal display panel, the pixel voltage of each display pixel cells is applied respectively to, its
In, it is not homochromy to make the color range value of display data with reflecting display image uniformity by applying subjectivity on electric field liquid crystal cells
Rank value corresponding conversion reference data voltage is different, corresponding identical to realize with reference data voltage corresponding relation by adjusting color range
Color range data reflect close display image by different liquid crystal, i.e.,：Adjust gamma curve.Wherein, in order to more preferably show effect
Fruit, each color sub-pixel correspond to a gamma curve respectively, and the gamma curve includes different color range data and corresponds to difference respectively
Reference voltage value.Therefore, in prior art, in order to objectively respond display image uniformity, phase in the sub-pixel of same color
With color range corresponding to reference voltage it is identical, that is to say, that same color sub-pixel only has a gamma curve, the gamma curve
Reflect that different color range values correspond to different reference voltage values, i.e.,：A kind of one color range value of color sub-pixels is in a corresponding benchmark
Magnitude of voltage.
In order to solve because backward red and green light can impact to adjacent backlight subarea backlight color, surrounding phase
Backward red and green light size can cause red, green and blue coloured light proportioning in the white light of target backlight subarea to lose in neighbouring region
Adjust, 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 determined the color range of each display data by comparative result compared with the backlight value weighted mean of other backlight subareas
Reference voltage value corresponding to value, i.e.,：When the mutually same color range value of display data in same color sub-pixels, due in the different back ofs the body
Different comparative results are produced under brightness, also can determine whether different reference voltage values, the different reference voltage value makes up backward red
Color and green light can cause red, green and blue coloured light proportioning variation issue in the white light of target backlight subarea.
Specifically, the backlight value of target backlight subarea and the backlight value weighted mean acquisition methods and reality of other backlight subareas
It is identical to apply example one, will not be repeated here.
In this implementation two, because display data is with color stage value in same color sub-pixels, according to target backlight subarea
Backlight value can determine that the reference voltage of different digital-to-analogue conversions, meeting from the backlight value weighted mean comparative result of other backlight subareas
Different pixels magnitude of voltage is converted to drive on display panel TFT data electrodes in corresponding sub-pixel unit, is shown with making up target
Show the display image colour cast problem that subregion is brought due to backlight colour cast.
Further illustrate, when backlight value is more than the backlight value weighted mean of other backlight subareas in target backlight subarea
When, it may be determined that the corresponding benchmark for showing all red and green sub-pixels digital-to-analogue conversions in subregion in the target backlight subarea
Voltage, it is improved 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, makes it reduce in the 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, it may be determined that the mesh
The corresponding reference voltage for showing all red and green sub-pixels digital-to-analogue conversions in subregion in backlight subarea is marked, reducing it should
All red and green sub-pixels pixel voltage values in subregion are shown, corresponding display in the target backlight subarea can also be determined
The reference voltage of the digital-to-analogue conversion of all blue subpixels in subregion, it is set to improve all blue subpixels in the display subregion
Pixel voltage value.
Wherein,, it is necessary to during all red and green sub-pixels pixel voltage values, it is all during the target shows subregion
It is red identical with green sub-pixels adjustment ratio amplitude, likewise, when needing the pixel voltage value of all blue subpixels, its institute
There is blue subpixels adjustment ratio amplitude also identical.
Can also be by preset two-dimensional data table, according to the backlight value of target backlight subarea and the backlight of 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
Magnitude of voltage, wherein, with reference to needing compensation magnitude to set in the preset two-dimensional data table.Wherein, the compensation magnitude can pass through
Experimental method, the backward red and green light of generation of statistics surrounding backlight subarea influence on the backlight illumination of target 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.
Example, Figure 11 is reference voltage generating unit output reference voltage value schematic diagram in the present embodiment two, as illustrated,
M different reference voltage values of V0~Vm are exported, wherein, backlight comparing section, the backlight value of generation target backlight subarea is carried on the back with other
The comparative result of the backlight value weighted mean of light subregion, reference voltage generating unit is according to the comparative result from reference voltage storage part
Middle tables of data reads reference voltage value corresponding to the color range value of display data, 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.
Wherein, reference voltage storage part includes multiple look-up tables, 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 corresponds to different color range data pair respectively
The reference voltage value answered.
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 corresponded to respectively, and it sets look-up method to lack with respect to look-up table number according to ratio.
In order to solve to influence 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, the adjustment can cause backward red and green to cause
In the white light of target backlight subarea red, green and blue coloured light proportioning imbalance, cause target backlight subarea backlight color uncontrolled and
Easy colour cast problem, the backlight value in target shows subregion according to target backlight subarea and other backlight subareas in the present embodiment two
Backlight value weighted mean be compared, preset different gamma curves are used according to comparative result, mesh is determined from the gamma curve
Mark shows the conversion reference voltage of each sub-pixel in subregion, wherein, the preset gamma curve is shown in subregion respectively with compensating target
Individual sub-pixel R（It is red）、G（Green）And B（Blueness）Pixel voltage value, can make up backward light by adjusting pixel voltage value
Bring backlight colour cast and cause display image colour 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, multiple spot lights 200 are arranged on the back encapsulating structure 701 of backlight module（Such as：On backboard）Bottom
On the inner surface of plate 704, spot light 200 can be located at going out for multiple spot lights 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 spot lights 200 light abundant mixed light requirement
Certain heat-insulated gap and light mixing distance are kept between material package portion 702 and multiple spot lights 200, wherein, multiple spot lights 200
Send excitation light（Such as：Blue light）After abundant mixed light, uniform excitation area source is formed.Then, the excitation area source is with sharp
Encourage the quanta point material on light direction and produce the excitation light formation white light for being energized light formation mixed light and/or transmission
Source, the quanta point material are encapsulated in quanta point material encapsulation part 702, wherein, quanta point material encapsulation part 702 can be diffusion
Quantum dot composition is encapsulated in plate, can be formed by encapsulating quantum dot in blooming piece, but also other encapsulating optical structures.The liquid crystal
Display device is taken in the liquid crystal display of subregion backlight dynamic control technology, it is necessary to will be aobvious according to backlight zoning ordinance
Show the gray-scale intensity of image frame subregion statistical picture picture, converted by gray-scale intensity values in the display image picture subregion
To drive the drive signal of backlight, i.e.,：The higher conversion backlight drive signal of the average gray-scale intensity of the display image picture subregion
Drive the brightness of backlight in the backlight subarea also bigger.
Understood as foregoing, in order to determine to compensate each subregion sub-pixel R（It is red）、G（Green）And B（Blueness）Pixel
Magnitude of voltage, as shown in figure 12, the liquid crystal display include：Image processing part, it is obtained according to the gray-scale intensity values of display image
Take backlight value in each backlight subarea, backlight comparing section, its backlight value according to target backlight subarea and other backlight subareas
Backlight value weighted mean is compared, and compensates control unit, it determines the target according to the backlight value comparative result of backlight comparing section
Backlight subarea correspondingly shows each sub-pixel R in subregion（It is red）、G（Green）And B（Blueness）Pixel voltage offset, compensation
Circuit, the pixel voltage value of each sub-pixel in the compensation display subregion is controlled according to the pixel voltage offset is determined.
Specifically, the backlight value of target backlight subarea and the backlight value weighted mean acquisition methods and reality of other backlight subareas
It is identical to apply example one, will not be repeated here.Wherein, compensation circuit belongs to prior art category, and those skilled in the art can be set
Specific compensation circuit.
Wherein, according to pixel magnitude of voltage after the compensation, to drive, TFT data are electric in each sub-pixel unit on display panel
Pole, influence display image colour cast problem to make up each display subregion backlight colour cast.
Specifically, when backlight value is more 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
Improve the target backlight subarea and correspondingly show all red and green sub-pixels pixel voltage values in subregion, 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
Reduce the target backlight subarea and correspondingly show all red and green sub-pixels pixel voltage values in subregion, can also be according to this
Determine that offset improves the pixel voltage value that the target shows all blue subpixels in subregion.
Further illustrate, 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 the pixel voltage value of green sub-pixels, the indigo plant in compensation target display subregion
During 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 by preset two-dimensional data table, in the preset two-dimensional data table with reference to need compensation magnitude come
Set.Wherein, the compensation magnitude by experimental method, can count the backward red and green light of generation of surrounding backlight subarea
The backlight illumination influence degree of target backlight subarea is determined.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 influence 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, the adjustment can cause backward red and green to cause
In the white light of target backlight subarea red, green and blue coloured light proportioning imbalance, cause target backlight subarea backlight color uncontrolled and
Easy colour cast problem, the backlight value in target shows subregion according to target backlight subarea and other backlight subareas 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 driving the pixel of TFT data electrodes in sub-pixel unit electric
Pressure value, carry out backlight colour cast to make up backward light belt and cause display image colour cast problem.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above method embodiment can pass through
Programmed instruction related hardware is completed, and foregoing program can be stored in a computer read/write memory medium, the program
Upon execution, the step of execution includes above method embodiment；And foregoing storage medium includes：Read-only storage（Read-
Only Memory, ROM）, random access memory（Random-Access Memory, RAM）, magnetic disc or CD etc. it is various
Can be with the medium of store program codes.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover 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 (7)
1. a kind of liquid crystal display, the liquid crystal display includes：By spot light and quanta point material encapsulation part, its feature
It is,
Backlight comparing section, according to the backlight value of target backlight subarea compared with the backlight value of other backlight subareas of surrounding, its
In, the backlight value is determined by gray-scale intensity values in picture portion, to drive spot light described in the target backlight subarea
Brightness；
Control unit is compensated, determines that the target shows that the pixel voltage of each sub-pixel in subregion is mended according to backlight value comparative result
Repay value；
Compensation circuit, the compensation target is controlled to show each sub-pixel in subregion according to the pixel voltage offset is determined
Pixel voltage value.
2. the liquid crystal display according to claim 1, it is characterised in that the compensation control unit, specifically include：
Determine that the target shows the compensating proportion of the pixel voltage value offset of red sub-pixel and green sub-pixels in subregion
Amplitude is identical, or, determine that the target shows the compensating proportion amplitude phase of the pixel voltage value of blue subpixels in subregion
Together.
3. the liquid crystal display according to claim 1, it is characterised in that the backlight comparing section, specifically include：
Determine that target shows the ratio of the backlight value of subregion and the weighting backlight value sum of surrounding backlight subarea.
4. the liquid crystal display according to claim 3, it is characterised in that the weighting backlight value of other backlight subareas of surrounding
Weight coefficient determined by the distance of distance objective backlight subarea, wherein, distance objective shows the more remote display subregion of subregion
Weight coefficient is smaller.
5. the liquid crystal display according to claim 1, it is characterised in that
The compensation control unit, the pixel voltage offset specifically for determining each sub-pixel by lookup table mode.
6. the liquid crystal display according to claim 1, it is characterised in that when backlight value is more than it in target backlight subarea
During the backlight value weighted mean of his backlight subarea,
The compensation circuit, all red and green in subregion is shown specifically for improving the target according to the offset
The pixel voltage value of sub-pixel, or, the target is reduced according to the offset and shows all blue subpixels in subregion
Pixel voltage value.
7. the liquid crystal display according to claim 1, it is characterised in that when backlight value is less than it in target backlight subarea
During the backlight value weighted mean of his backlight subarea,
The compensation circuit, all red and green in subregion is shown specifically for reducing the target according to the offset
The pixel voltage value of sub-pixel, or, the target is improved according to the offset and shows all blue subpixels in subregion
Pixel voltage value.
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| CN201510902188.3A CN105304028B (en) | 2015-12-09 | 2015-12-09 | A kind of image processing method and liquid crystal display |
| CN201810059956.7A CN108231013B (en) | 2015-12-09 | 2015-12-09 | A kind of image processing method and liquid crystal display |
| CN201810034572.XA CN108257562B (en) | 2015-12-09 | 2015-12-09 | Image processing method and liquid crystal display device |
| US15/277,603 US10360868B2 (en) | 2015-12-09 | 2016-09-27 | Image processing method and liquid crystal display device |
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| CN108877693A (en) * | 2018-07-23 | 2018-11-23 | 东南大学 | A kind of four sequential liquid crystal display control methods |
| CN109192174B (en) * | 2018-11-05 | 2020-05-05 | 惠科股份有限公司 | Driving method and driving device of display panel and display device |
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| CN112017604B (en) * | 2019-05-31 | 2022-07-08 | 京东方科技集团股份有限公司 | Driving method, driving device, display device and computer readable storage medium |
| CN110264977A (en) * | 2019-06-25 | 2019-09-20 | 惠科股份有限公司 | Display brightness adjustment method and device |
| CN112785984B (en) * | 2019-11-08 | 2021-12-10 | 南京航空航天大学 | LCD high-efficiency self-adaptive global backlight adjusting method for image gray level perception |
| CN112820224B (en) * | 2019-11-15 | 2023-02-24 | 上海和辉光电股份有限公司 | Display control method and device of display equipment and display equipment |
| CN111009207B (en) * | 2019-12-25 | 2022-07-01 | 武汉天马微电子有限公司 | Method and device for improving display unevenness of display screen |
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2015
- 2015-12-09 CN CN201810059956.7A patent/CN108231013B/en active Active
- 2015-12-09 CN CN201510902188.3A patent/CN105304028B/en active Active
- 2015-12-09 CN CN201810034572.XA patent/CN108257562B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108257562B (en) | 2019-12-27 |
| CN108231013A (en) | 2018-06-29 |
| CN105304028A (en) | 2016-02-03 |
| CN108231013B (en) | 2019-11-29 |
| CN108257562A (en) | 2018-07-06 |
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