CN107978282A - Display device and its driving method - Google Patents
Display device and its driving method Download PDFInfo
- Publication number
- CN107978282A CN107978282A CN201711367629.XA CN201711367629A CN107978282A CN 107978282 A CN107978282 A CN 107978282A CN 201711367629 A CN201711367629 A CN 201711367629A CN 107978282 A CN107978282 A CN 107978282A
- Authority
- CN
- China
- Prior art keywords
- driving voltage
- backlight
- signal
- backlight illumination
- region
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
- G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
Abstract
The present invention relates to a kind of display device and its driving method.The display device includes display panel, backlight module and drive circuit, backlight module includes backlight and zonal control unit, zonal control unit is used to the backlight module being divided into multiple regions, and the emitting brightness in each region of independent control, drive circuit are used for：Obtaining needs the input signal to be shown per two field picture；It will be shown per two field picture by former and later two subframes；The driving voltage of pixel according to corresponding to each region, determines the size of the backlight illumination thermal compensation signal in each region；The emitting brightness in each region is adjusted according to backlight illumination thermal compensation signal.The present invention by backlight module be divided into it is multiple can independent control emitting brightness region, can correspondingly single backlight illumination compensation be carried out to the pixel of different blocks on display panel, compared with the backlight module using unified backlight illumination, there is more preferable anti-flicker effect.
Description
Technical field
The present invention relates to display, more particularly to a kind of display device, further relates to a kind of driving method of display device.
Background technology
Vertical orientation (VA) type liquid crystal display is a kind of common liquid crystal display.VA types liquid crystal display is regarded in big
Brightness is rapidly saturated with driving voltage under angle, so as to cause colour cast more serious, and then influences image quality.
A kind of improved scheme is that every two field picture being shown by former and later two subframes to, (such as the image of 60Hz passes through
One in front and one in back the subframe of two 120Hz is shown), and the pixel drive voltage of a subframe is high voltage, another subframe
Pixel drive voltage be low-voltage.
However, this scheme, when high-low voltage difference is larger, human eye can relatively significantly feel the bright of two subframes
Flicker caused by spending difference.
The content of the invention
In order to solve the flicker problem of such scheme, it is necessary to provide a kind of driving method of display device.
A kind of driving method of display device, including：The backlight of display device is divided into multiple regions, display device
Pixel be divided into and the one-to-one block in the region of backlight；Pass through each region of zonal control unit independent control
Emitting brightness；Obtaining needs the input signal to be shown per two field picture；Carried out described per two field picture by former and later two subframes
It has been shown that, and the driving voltage of the pixel of a subframe is more than the driving voltage of same pixel in another subframe；According to each institute
The driving voltage of the pixel corresponding to region is stated, determines that each region corresponds to the backlight illumination compensation letter of two subframes respectively
Number size；Wherein, the more high then backlight illumination thermal compensation signal of the driving voltage is smaller, the more low then backlight of the driving voltage is bright
Degree thermal compensation signal is bigger, to alleviate the luminance difference of same pixel in two subframes；And according to the backlight illumination thermal compensation signal
Adjust the emitting brightness in each region.
In one of the embodiments, the method, which further includes, obtains the benchmark backlight illumination letter corresponding per two field picture
Number the step of；The driving voltage of each pixel corresponding to the region of the basis, determines that each region corresponds to respectively
The step of size of the backlight illumination thermal compensation signal of two subframes, includes：Color of object in input signal of the statistics per two field picture
Peak signal and minimum signal of the pixel in each block；The driving voltage of the peak signal is obtained, one of son
The driving voltage of frame is denoted as the first driving voltage, and the driving voltage of another subframe is denoted as the second driving voltage；Described in obtaining most
The driving voltage of small-signal, the driving voltage of one of subframe are denoted as the 3rd driving voltage, the driving voltage of another subframe
It is denoted as the 4th driving voltage；According to first driving voltage, the second driving voltage, the 3rd driving voltage, the 4th driving voltage
And benchmark backlight illumination signal asks for the backlight illumination thermal compensation signal.
In one of the embodiments, it is described according to first driving voltage, the second driving voltage, the 3rd driving electricity
The step of pressure, the 4th driving voltage and benchmark backlight illumination signal ask for the backlight illumination thermal compensation signal, is according to as follows
Formula is calculated：
LL＜ L ＜ LH；
PTH×L+PTL× L=PTH×LL+PTL×LH；
P′TH×L+P′TL× L=P 'TH×LL+P′TL×LH；
Wherein, LLFor less one of backlight illumination thermal compensation signal in two subframes of every two field picture, LHFor larger one
It is a, PTHFor first driving voltage, PTLFor second driving voltage, P 'THFor the 3rd driving voltage, P 'TLTo be described
4th driving voltage, L are the benchmark backlight illumination signal.
In one of the embodiments, the backlight is white backlight source, and the color of object sub-pixel is green
Pixel.
In one of the embodiments, the emitting brightness that each region is adjusted according to the backlight illumination thermal compensation signal
The step of, it is that backlight illumination compensation is carried out to next two field picture.
In one of the embodiments, the emitting brightness that each region is adjusted according to the backlight illumination thermal compensation signal
The step of before, further include and the backlight illumination thermal compensation signal in each region be adjusted, to relax the emitting brightness of adjacent area
The step of difference.
It there is a need to and a kind of display device is provided.
A kind of display device, including：Display panel；Backlight module, including backlight and zonal control unit, the subregion
Control unit is used to the backlight being divided into multiple regions, and the emitting brightness in each region of independent control, the display
Pixel in panel is divided into and the one-to-one block in the region of backlight module；And drive circuit, including：Input module,
The input signal to be shown per two field picture is needed for obtaining；High-low voltage framing display module, for will pass through per two field picture
Former and later two subframes are shown, and the driving voltage of the pixel of a subframe is more than the driving of same pixel in another subframe
Voltage；Backlight compensation determining module, for the driving voltage of the pixel according to corresponding to each region, determines each described
Region corresponds to the size of the backlight illumination thermal compensation signal of two subframes respectively；The more high then backlight illumination thermal compensation signal of driving voltage is more
The more low then backlight illumination thermal compensation signal of small, driving voltage is bigger, to alleviate the luminance difference of same pixel in two subframes；And the back of the body
Brightness adjusts module, for adjusting the emitting brightness in each region according to the backlight illumination thermal compensation signal.
In one of the embodiments, the backlight is white backlight source, and the drive circuit is further included for obtaining
The benchmark backlight illumination module per the corresponding benchmark backlight illumination signal of two field picture；The backlight compensation determining module bag
Include：Most value signal statistic unit, color of object sub-pixel is in each block in the input signal for counting every two field picture
Peak signal and minimum signal；Peak signal acquiring unit, for obtaining the driving voltage of the peak signal, one of them
The driving voltage of subframe is denoted as the first driving voltage, and the driving voltage of another subframe is denoted as the second driving voltage；Minimum signal
Acquiring unit, for obtaining the driving voltage of the minimum signal, the driving voltage of one of subframe is denoted as the 3rd driving electricity
Pressure, the driving voltage of another subframe are denoted as the 4th driving voltage；And backlight illumination thermal compensation signal computing unit, for according to institute
The first driving voltage, the second driving voltage, the 3rd driving voltage, the 4th driving voltage and benchmark backlight illumination signal is stated to ask for
The backlight illumination thermal compensation signal.
In one of the embodiments, the drive circuit further includes：Space low pass smoothing filter, for each described
The backlight illumination thermal compensation signal in region is adjusted, to relax the emitting brightness of adjacent area；The backlight illumination adjusts module
It is the emitting brightness that each region is adjusted according to the backlight illumination thermal compensation signal after adjustment.
A kind of display device, the display device are liquid crystal display, including：Display panel；Backlight module, including backlight
Source and zonal control unit, the zonal control unit is used to the backlight being divided into multiple regions, and independent control is every
The emitting brightness in a region, the pixel in the display panel are divided into and the one-to-one block in the region of backlight module；
And drive circuit, including：Input module, the input signal to be shown per two field picture is needed for obtaining；High-low voltage framing is shown
Show module, for will be shown per two field picture by former and later two subframes, and the driving voltage of the pixel of the first subframe is more than
The driving voltage of same pixel in second subframe；Benchmark backlight illumination module, it is described per the corresponding benchmark of two field picture for obtaining
Backlight illumination signal；Backlight compensation determining module, color of object sub-pixel is every in the input signal for counting every two field picture
The peak signal and minimum signal of a block, and each region is calculated according to equation below and corresponds to two subframes respectively
Backlight illumination thermal compensation signal size：
LL＜ L ＜ LH；
PTH×L+PTL× L=PTH×LL+PTL×LH；
P′TH×L+P′TL× L=P 'TH×LL+P′TL×LH；
Wherein, LLFor the brightness value of the backlight illumination thermal compensation signal of first subframe, LHFor the backlight of second subframe
The brightness value of luminance compensation signal, PTHFor first driving voltage, PTLFor second driving voltage, P 'THFor the described 3rd
Driving voltage, P 'TLFor the 4th driving voltage, L is the brightness value of the benchmark backlight illumination signal；And backlight illumination adjustment
Module, for adjusting the emitting brightness in each region according to the backlight illumination thermal compensation signal.
Above-mentioned display device and its driving method, will be shown, two subframes per two field picture by former and later two subframes
In same pixel driving voltage it is one high and one low, and the backlight illumination one dark one of two subframes is bright, same in two subframes to alleviate
The luminance difference of one pixel, so as to reduce scintillation caused by the driving voltage fluctuation of two subframes.Zonal control unit will
Backlight module be divided into it is multiple can independent control emitting brightness region, correspondingly can be to the picture of different blocks on display panel
Element carries out single backlight illumination compensation, compared with the backlight module using unified backlight illumination, has more preferable anti-flicker effect.
Also, using the driving method of above-mentioned display device, the pixel of liquid crystal display need not be further divided into main and secondary sub-pixel,
So as to substantially reduce the process complexity of display panel, and greatly improve penetrance and the parsing of liquid crystal display panel
Degree, reduces the cost of backlight design.
Brief description of the drawings
Fig. 1 is the flow chart of the driving method of the display device in an embodiment；
Fig. 2 is the signal of the backlight module of the liquid crystal display of the driving method suitable for display device in an embodiment
Figure；
Fig. 3 is the flow chart of the sub-step of step S130 in an embodiment；
Fig. 4 is the flow chart of the sub-step of step S130 in another embodiment；
Fig. 5 is the schematic diagram for carrying out space low pass the disposal of gentle filter in an embodiment to backlight compensation value；
Fig. 6 is the block diagram of drive circuit in an embodiment；
Fig. 7 is the signal of the backlight module of the liquid crystal display of the driving method suitable for display device in an embodiment
Figure；
Fig. 8 is the block diagram of display device in an embodiment.
Embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In attached drawing
Give the preferred embodiment of the present invention.But the present invention can realize in many different forms, however it is not limited to this paper institutes
The embodiment of description.On the contrary, the purpose for providing these embodiments is made to the disclosure more thorough and comprehensive.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention
The normally understood implication of technical staff is identical.Term used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein " and/or " include one or more phases
The arbitrary and all combination of the Listed Items of pass.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or there may also be element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " on ",
" under ", "left", "right" and similar statement for illustrative purposes only.
The display device that the driving method of the display device of the present invention is applicable in can be that TN (twisted-nematic), VA (vertically match somebody with somebody
To), the liquid crystal display of the type such as OCB (optical compensation curved arrangement), but be not limited to this.The backlight of the liquid crystal display can
With with straight lower or side backlight, backlight can be white light, tetra- coloured light of RGB three-color light sources, tetra- color light sources of WRGB or RGBY
Source, but be not limited to this.The driving method is equally applicable to the situation that liquid crystal display is Curved screen.
Fig. 2 is the schematic diagram of the backlight module of the display device of the driving method suitable for display device in an embodiment,
The backlight module 100 includes backlight and zonal control unit, and the light of backlight causes under the control of zonal control unit
Backlight module 100 shows multiple regions 10 (being in the present embodiment 9*7=63) in matrix arrangement, each region 10
By zonal control unit independent control emitting brightness, enter human eye after the display panel that the light of outgoing passes through liquid crystal display.
We will expose to which pixel on display panel according to the emergent ray in each region 10, and display panel is divided into one
Each and every one block, the region 10 of each block and backlight module correspond.Such as in the embodiment depicted in figure 2, being exactly will display
Panel is divided into 63 blocks.
Fig. 1 is the flow chart of the driving method of the display device in an embodiment, is comprised the following steps：
S110, obtaining needs the input signal to be shown per two field picture.
Liquid crystal display is obtained from extraneous equipment --- such as graphics processor (GPU) --- needs every frame figure to be shown
The input signal of picture.Liquid crystal display can also obtain a benchmark backlight illumination according to the input signal and (be used to control backlight
Emitting brightness, can be represented with a benchmark backlight illumination signal), the brightness for without backlight compensation when backlight
Backlight illumination.The two actions are the prior art, and details are not described herein again.
S120, will be shown that the driving voltage of the pixel of a subframe is more than by former and later two subframes per two field picture
Another subframe.
It will be shown per two field picture by former and later two subframes, a two field picture is also divided into two frame figures in sequential
Picture, is denoted as the first subframe and the second subframe respectively, by the first subframe and the second subframe mutually compensate for user show with it is defeated
Enter the corresponding image of signal.Fig. 7 shows that the pixel on liquid crystal layer 20 (is at this time respectively for driving voltage in the first subframe N_1
High voltage signal RTH/GTH/BTH) and the second subframe N_2 (be at this time low voltage signal R for driving voltageTL/GTL/BTL) under feelings
Condition, the driving voltage of each pixel in the first subframe are all higher than the driving voltage of corresponding sub-pixel in the second subframe.That is,
First subframe is driven using high driving voltage, and the second subframe uses the low driving voltage less than the first subframe to be driven
It is dynamic.The driving voltage of each sub-pixel of first subframe and the second subframe can utilize look-up table (LUT, Look UP Table)
Search and obtain.Specifically, look-up table can be stored in inside frame buffer (frame buffer) in advance in liquid crystal display.Search
Table for input signal voltage and the first subframe corresponding with the input signal, the second subframe each sub-pixel driving voltage
Mapping table.By taking the drive voltage signal of 8bit as an example, the color gray value 0~255 of every R/G/B input signals corresponds to
There are 256 pairs of high-low voltage signals, share 3*256 to high voltage signal RTH/GTH/BTHWith low voltage signal RTL/GTL/BTL.Therefore,
Corresponding high driving voltage and corresponding low driving electricity can be searched according to the color gray value of each sub-pixel in input signal
Pressure so that using the high driving voltage as the driving voltage of the sub-pixel in the first subframe, using corresponding low driving voltage as
The driving voltage of the sub-pixel in second subframe.
S130, according to the driving voltage of the corresponding pixel in each region, determines that the backlight illumination of each two subframe of region is mended
Repay the size of signal.
The size of the backlight illumination thermal compensation signal in each region of backlight module, is the pixel of the block according to corresponding to it
The size of driving voltage determine that the more high then backlight illumination thermal compensation signal of driving voltage is smaller, the more low then backlight of driving voltage
Luminance compensation signal is bigger.The subframe of different sizes of two driving voltages for same two field picture, backlight illumination thermal compensation signal
It is of different sizes, the first subframe of high driving voltage is compensated by a dark backlight illumination thermal compensation signal, low driving
Second subframe of voltage is compensated by a brighter backlight illumination thermal compensation signal, to alleviate two subframes per two field picture
In same pixel luminance difference.It should be understood that for two one high and one low subframes of driving voltage, when passing through backlight illumination
When thermal compensation signal makes the brightness of same pixel remain unchanged, the flicker that the difference of driving voltage is brought can be completely eliminated.However,
The driving voltage difference of different pixels is probably different, we are difficult to carry out single backlight illumination benefit for each pixel
Repay.Backlight module in the present embodiment include it is multiple can independent control emitting brightness region, correspondingly can be to display panel
The pixel of upper different blocks carries out single backlight illumination compensation, compared with the backlight module using unified backlight illumination, has more
Good anti-flicker effect.
S140, the emitting brightness in each region is adjusted according to backlight illumination thermal compensation signal.
Since every two field picture is shown by the first subframe of high driving voltage and the second subframe of low driving voltage, because
The emitting brightness of this backlight module is also a low-light level and a high brightness accordingly, respectively the first subframe of corresponding compensation and the
Two subframes.Due to the emitting brightness independent control in each region of backlight module, the driving electricity of the pixel of each block of display panel
Pressure is again different, therefore the backlight illumination thermal compensation signal in each region or even emitting brightness would also vary from.If first
The driving voltage difference of subframe and the second subframe is smaller, then the backlight illumination compensation letter of two subframes calculated in step S130
Number size gap it is little.In one embodiment, when the driving voltage difference of the first subframe and the second subframe is less than default
When backlight illumination compensates threshold value, then backlight illumination compensation mechanism is not started, backlight module is directly carried out using benchmark backlight illumination
Light emitting control.In another embodiment or the backlight illumination thermal compensation signal of two subframes difference be less than it is default
When backlight illumination compensates threshold value, backlight illumination compensation mechanism is not started.
The driving method of above-mentioned display device, will be shown per two field picture by former and later two subframes, in two subframes
The driving voltage of same pixel is one high and one low, and the backlight illumination one dark one of two subframes is bright, same in two subframes to alleviate
The luminance difference of pixel, so as to reduce scintillation caused by the driving voltage fluctuation of two subframes.Zonal control unit will be carried on the back
Optical module be divided into it is multiple can independent control emitting brightness region, correspondingly can be to the pixel of different blocks on display panel
Single backlight illumination compensation is carried out, compared with the backlight module using unified backlight illumination, there is more preferable anti-flicker effect.And
And main and secondary sub-pixel need not be further divided into using the driving method of above-mentioned display device, the pixel of liquid crystal display, from
And the process complexity of display panel can be substantially reduced, and the penetrance and resolution of liquid crystal display panel are greatly improved,
Reduce the cost of backlight design.
In one embodiment, step S140 is to carry out backlight illumination compensation to next two field picture so that next two field picture
Two subframes in the backlight illumination of the higher subframe of driving voltage be less than benchmark backlight illumination, the backlight illumination of another subframe
More than benchmark backlight illumination.The backlight illumination of the two field picture currently shown is calculated according to previous frame image.Due to
Adjacent two field pictures are usually essentially identical, therefore it is also reasonable that present frame carries out backlight illumination compensation according to previous frame image
's.
In one embodiment, step S130 is realized especially by the following manner：
S310, count per two field picture input signal in color of object sub-pixel each block peak signal and minimum
Signal.
Referring to Fig. 3, step S310 is divided into the step S312 of statistics peak signal and the step S314 of statistics minimum signal again.
Color of object sub-pixel can be green sub-pixels (Green sub-pixel), red sub-pixel (Red sub-pixel) or
Blue subpixels (Blue sub-pixel), or any two of which or at the same time using above three as color of object
Sub-pixel.When the backlight of liquid crystal display is white backlight source, color of object sub-pixel can be green sub-pixels, red son
Pixel or blue subpixels.Preferably, when the backlight of liquid crystal display is white backlight source, color of object sub-pixel is selected
Green sub-pixels.Green is for red and blueness, its brightness is more obvious and human eye is more sensitive to its flicker level.
Therefore, in one embodiment, with the driving voltage of green sub-pixels come determine to each color sub-pixels carry out backlight illumination benefit
The backlight illumination thermal compensation signal repaid, so as to mitigate flicker.When the backlight of liquid crystal display is tri- color backlights of RGB, target face
Sub-pixels include green sub-pixels, red sub-pixel and blue subpixels at the same time, bright with the backlight to different colours sub-pixel
Degree thermal compensation signal is asked for.When the backlight of liquid crystal display is other backlights framework such as WRGB, color of object sub-pixel
It can be adjusted according to backlight framework.The peak signal of color of object sub-pixel can be color of object color gray scale most
Big value, the minimum signal of color of object sub-pixel can be the color minimum gray value of color of object.
S320, obtains the driving voltage of peak signal.
The driving voltage and the second son of corresponding first subframe of peak signal of each block are obtained by searching for table (LUT)
The driving voltage of frame, and the first driving voltage P is denoted as respectivelyTHWith the second driving voltage PTL。
S330, obtains the driving voltage of minimum signal.
The driving voltage and the second subframe of corresponding first subframe of minimum signal of each block are obtained by searching for table
Driving voltage, and the 3rd driving voltage P ' is denoted as respectivelyTHWith the 4th driving voltage P 'TL.Step S320 is performed after S312
Can, step S330 is performed after S314, and step S312 to S320 and step S314 to S330 is two parallel flows,
Each other without priority requirement sequentially.
S340, backlight illumination compensation is asked for according to the maximum, driving voltage of minimum signal and benchmark backlight illumination signal
Signal.
According to the first driving voltage PTH, the second driving voltage PTL, the 3rd driving voltage P 'TH, the 4th driving voltage P 'TLWith
And the brightness value L of benchmark backlight illumination signal asks for the brightness value L of the backlight illumination thermal compensation signal of the first subframeLWith the second subframe
Backlight illumination thermal compensation signal brightness value LH.In one embodiment, calculated especially by equation below：
LL＜ L ＜ LH (1)
PTH×L+PTL× L=PTH×LL+PTL×LH； (2)
P′TH×L+P′TL× L=P 'TH×LL+P′TL×LH； (3)
By solving above-mentioned calculation formula, multigroup backlight illumination thermal compensation signal L met the requirements may be gotLAnd LH。
Therefore, corresponding subsidiary conditions can be subject to and determine the ideal offset of one of which.For example, can be by limiting backlight
Luminance compensation signal LLAnd LHBetween difference range determine thermal compensation signal.In the present embodiment, also needed in calculating process
Judge the first driving voltage PTHWith the second driving voltage PTLBetween difference whether be more than backlight illumination compensation threshold X, Ye Jiman
Sufficient condition：
PTH-PTL＞ X (4)
When the condition that is unsatisfactory for (4), namely driving voltage difference no more than backlight illumination compensation threshold X when, do not start the back of the body
Brightness compensates, and the backlight illumination of liquid crystal display keeps benchmark backlight illumination L, so that when avoiding voltage signal difference smaller still
Backlight compensation is carried out to backlight illumination, the complexity of driving process can be reduced, so as to improve the stability of system.
Fig. 4 is that the backlight of liquid crystal display is the flow chart of the sub-step of step S130 in the embodiment in white backlight source,
Including：
S412, counts peak signal of the input signal Green sub-pixel per two field picture in each block.
The peak signal G of green sub-pixels is counted, peak signal G can be the color gray scale maximum of green.
S414, counts minimum signal of the input signal Green sub-pixel per two field picture in each block.
The minimum signal G ' of green sub-pixels is counted, minimum signal G ' can be the color minimum gray value of green.
S420, obtains the driving voltage of peak signal.
High driving voltage (namely first driving voltage) G of the first subframe N_1 is obtained by searching for table searchTH, Yi Jitong
Cross and search low driving voltage (namely second driving voltage) G that table search obtains the second subframe N_2TL。
S430, obtains the driving voltage of minimum signal.
High driving voltage (namely the 3rd driving voltage) G ' of the first subframe N_1 is obtained by searching for table searchTH, Yi Jitong
Cross and search low driving voltage (namely the 4th driving voltage) G ' that table search obtains the second subframe N_2TL。
S440, backlight illumination compensation is asked for according to the maximum, driving voltage of minimum signal and benchmark backlight illumination signal
Signal.
Ask for backlight illumination thermal compensation signal LLAnd LHFormula it is as follows：
LL＜ L ＜ LH (5)
GTH×L+GTL× L=GTH×LL+GTL×LH (6)
G′TH×L+G′TL× L=G 'TH×LL+G′TL×LH (7)
GTH-GTL＞ X (8)
For formula (8), when it is not satisfied, namely when driving voltage difference is no more than backlight illumination compensation threshold X,
Backlight illumination compensation is not started, the backlight illumination of liquid crystal display keeps benchmark backlight illumination L.
It should be understood that due to backlight module include it is multiple can independent control emitting brightness region, on display panel
The pixel of different blocks carries out single backlight illumination compensation, therefore the emitting brightness in these regions can be variant, and adjacent region
Emitting brightness difference between domain causes naked eyes to perceive the phenomenon of brightness irregularities.In order to solve or mitigate this defect,
In one embodiment, further included before step S140 and the backlight illumination thermal compensation signal in each region is adjusted, it is adjacent to relax
The step of emitting brightness difference in region.Further, in one embodiment, which is by space low pass smothing filtering
Processing is realized.After the low pass the disposal of gentle filter of space, it is very big that the backlight illumination offset of regional is unlikely to difference, energy
Enough avoid adjacent region because emitting brightness difference greatly caused by brightness disproportionation with flicker phenomenon.
What space low pass the disposal of gentle filter was equivalent to consider other regions around each region of backlight module goes out light
Degree, is then accordingly adjusted the backlight illumination offset in the region.With the backlight module in 9*7=63 region shown in Fig. 5
Exemplified by 200, space low pass the disposal of gentle filter is illustrated：Assuming that the backlight that the region that f (x, y) is labeled with figure calculates
Brightness offset value is f (x, y), and wherein x, y represent horizontal, ordinate respectively, since the region one adjacent with the region shares 8
(marking in Figure 5), then the region pass through the backlight illumination offset g (x, y) that is obtained after the low pass the disposal of gentle filter of space
=w1*f (x-1, y-1)+w2*f (x-1, y)+w3*f (x-1, y+1)+w4*f (x, y-1)+w5*f (x, y)+w6*f (x, y+1)+
w7*f(x+1,y-1)+w8*f(x+1,y)+w9*f(x+1,y+1).Wherein w1~w9 is the weight in each region, its specific value can
To pass through experiment and experience designed, designed by those skilled in the art.Usually, w1+w2+ ...+w9=1.It is it should be understood that right
In positioned at the region at 200 4 angles of backlight module, adjacent area has 3；For the region on 200 side of backlight module, phase
Neighbouring region has 5.It should be understood that the backlight illumination thermal compensation signal L for corresponding to two subframes respectivelyLAnd LH, it is necessary to respectively into
Row space low pass the disposal of gentle filter.
Referring to Fig. 8, the present invention also provides a kind of display device 300, including display panel 310, backlight module 320 and driving
Circuit 330.Display device 300 can be the classes such as TN (twisted-nematic), VA (vertical orientation), OCB (optical compensation curved arrangement)
The liquid crystal display of type, but be not limited to this.The backlight of the liquid crystal display can use straight lower or side backlight, backlight can
Think white light, tetra- color light source of RGB three-color light sources, tetra- color light sources of WRGB or RGBY, but be not limited to this.Display device 300 is also
It can be the liquid crystal display of Curved screen.
In one embodiment, backlight module includes backlight and zonal control unit.Zonal control unit is used for will the back of the body
Optical module is divided into multiple regions, and the emitting brightness in each region of independent control.Pixel in display panel be divided into
The one-to-one block in region of backlight module.Drive circuit is used for the driving method for performing above-mentioned display device, and this method can
To coordinate the software for the memory being stored in drive circuit to realize, i.e., realized, can also adopted by the cooperating of software and hardware
Realized with the known pure hardware circuit in this area.
In the embodiment shown in fig. 6, drive circuit includes input module 22, high-low voltage framing display module 24, base
Quasi- backlight illumination module 26, backlight compensation determining module 28 and backlight illumination adjustment module 29.Input module 22 is used to obtain
Need the input signal to be shown per two field picture.High-low voltage framing display module 24 is used to that former and later two will to be passed through per two field picture
Subframe is shown, and the driving voltage of the pixel of the first subframe is more than the driving voltage of same pixel in the second subframe.Benchmark
Backlight illumination module 26 is used to obtain the corresponding benchmark backlight illumination signal of every two field picture.Backlight compensation determining module 28 is used to unite
In input signal of the meter per two field picture color of object sub-pixel each block peak signal and minimum signal, and according to as follows
Formula calculates the size that each region 10 corresponds to the backlight illumination thermal compensation signal of two subframes respectively：
LL＜ L ＜ LH；
PTH×L+PTL× L=PTH×LL+PTL×LH；
P′TH×L+P′TL× L=P 'TH×LL+P′TL×LH；
Wherein, LLFor the brightness value of the backlight illumination thermal compensation signal of the first subframe, LHCompensated for the backlight illumination of the second subframe
The brightness value of signal, PTHFor the first driving voltage, PTLFor the second driving voltage, P 'THFor the 3rd driving voltage, P 'TLFor 4 wheel driven
Dynamic voltage, the brightness value of backlight illumination signal on the basis of L.Backlight illumination adjustment module 29 is used for according to backlight illumination thermal compensation signal
Adjust the emitting brightness in each region 10.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the present invention, its description is more specific and detailed, but simultaneously
Cannot therefore it be construed as limiting the scope of the patent.It should be pointed out that come for those of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
- A kind of 1. driving method of display device, it is characterised in that including：The backlight of display device is divided into multiple regions, the pixel of display device is divided into the region of backlight one by one Corresponding block；Pass through the emitting brightness in each region of zonal control unit independent control；Obtaining needs the input signal to be shown per two field picture；Shown described per two field picture by former and later two subframes, and the driving voltage of the pixel of a subframe is more than another The driving voltage of same pixel in a subframe；The driving voltage of pixel according to corresponding to each region, determines that each region corresponds to two subframes respectively The size of backlight illumination thermal compensation signal；Wherein, the more high then backlight illumination thermal compensation signal of the driving voltage is smaller, the driving is electric The more low then backlight illumination thermal compensation signal of pressure is bigger, to alleviate the luminance difference of same pixel in two subframes；AndThe emitting brightness in each region is adjusted according to the backlight illumination thermal compensation signal.
- 2. according to the method described in claim 1, it is characterized in that, the method further include obtain it is described per two field picture it is corresponding The step of benchmark backlight illumination signal；The driving voltage of each pixel corresponding to the region of the basis, determines that each region corresponds to two sons respectively The step of size of the backlight illumination thermal compensation signal of frame, includes：Peak signal and minimum signal of the color of object sub-pixel in each block in input signal of the statistics per two field picture；The driving voltage of the peak signal is obtained, the driving voltage of one of subframe is denoted as the first driving voltage, another The driving voltage of subframe is denoted as the second driving voltage；The driving voltage of the minimum signal is obtained, the driving voltage of one of subframe is denoted as the 3rd driving voltage, another The driving voltage of subframe is denoted as the 4th driving voltage；It is bright according to first driving voltage, the second driving voltage, the 3rd driving voltage, the 4th driving voltage and benchmark backlight Degree signal asks for the backlight illumination thermal compensation signal.
- It is 3. according to the method described in claim 2, it is characterized in that, described according to first driving voltage, the second driving electricity Pressure, the 3rd driving voltage, the 4th driving voltage and benchmark backlight illumination signal ask for the step of the backlight illumination thermal compensation signal Suddenly, it is to be calculated according to equation below：LL＜ L ＜ LH；PTH×L+PTL× L=PTH×LL+PTL×LH；P′TH×L+P′TL× L=P 'TH×LL+P′TL×LH；Wherein, LLFor less one of backlight illumination thermal compensation signal in two subframes of every two field picture, LHFor larger one, PTH For first driving voltage, PTLFor second driving voltage, P 'THFor the 3rd driving voltage, P 'TLFor the described 4th Driving voltage, L are the benchmark backlight illumination signal.
- 4. according to the method in claim 2 or 3, it is characterised in that the backlight is white backlight source, the target face Sub-pixels are green sub-pixels.
- 5. according to the method described in claim 1, it is characterized in that, described adjust each according to the backlight illumination thermal compensation signal The step of emitting brightness in region, be to carry out backlight illumination compensation to next two field picture.
- 6. according to the method described in claim 1, it is characterized in that, described adjust each according to the backlight illumination thermal compensation signal Before the step of emitting brightness in region, further include and the backlight illumination thermal compensation signal in each region is adjusted, it is adjacent to relax The step of emitting brightness difference in region.
- A kind of 7. display device, it is characterised in that including：Display panel；Backlight module, including backlight and zonal control unit, the zonal control unit are used to the backlight being divided into Multiple regions, and the emitting brightness in each region of independent control, the pixel in the display panel is divided into and backlight module The one-to-one block in region；AndDrive circuit, including：Input module, the input signal to be shown per two field picture is needed for obtaining；High-low voltage framing display module, for will be shown by former and later two subframes per two field picture, and subframe The driving voltage of pixel is more than the driving voltage of same pixel in another subframe；Backlight compensation determining module, for the driving voltage of the pixel according to corresponding to each region, determines each described Region corresponds to the size of the backlight illumination thermal compensation signal of two subframes respectively；The more high then backlight illumination thermal compensation signal of driving voltage is more The more low then backlight illumination thermal compensation signal of small, driving voltage is bigger, to alleviate the luminance difference of same pixel in two subframes；AndBacklight illumination adjusts module, for adjusting the emitting brightness in each region according to the backlight illumination thermal compensation signal.
- 8. display device according to claim 7, it is characterised in that the backlight is white backlight source, the driving Circuit is further included for obtaining the benchmark backlight illumination module per the corresponding benchmark backlight illumination signal of two field picture；The backlight compensation determining module includes：Most value signal statistic unit, color of object sub-pixel is in each block in the input signal for counting every two field picture Peak signal and minimum signal；Peak signal acquiring unit, for obtaining the driving voltage of the peak signal, the driving voltage note of one of subframe For the first driving voltage, the driving voltage of another subframe is denoted as the second driving voltage；Minimum signal acquiring unit, for obtaining the driving voltage of the minimum signal, the driving voltage note of one of subframe For the 3rd driving voltage, the driving voltage of another subframe is denoted as the 4th driving voltage；AndBacklight illumination thermal compensation signal computing unit, for according to first driving voltage, the second driving voltage, the 3rd driving electricity Pressure, the 4th driving voltage and benchmark backlight illumination signal ask for the backlight illumination thermal compensation signal.
- 9. display device according to claim 7, it is characterised in that the drive circuit further includes：Space low pass smoothing filter is adjacent to relax for being adjusted to the backlight illumination thermal compensation signal in each region The emitting brightness in region；The backlight illumination adjustment module is to adjust each region according to the backlight illumination thermal compensation signal after adjustment Emitting brightness.
- 10. a kind of display device, the display device is liquid crystal display, it is characterised in that including：Display panel；Backlight module, including backlight and zonal control unit, the zonal control unit are used to the backlight being divided into Multiple regions, and the emitting brightness in each region of independent control, the pixel in the display panel is divided into and backlight module The one-to-one block in region；AndDrive circuit, including：Input module, the input signal to be shown per two field picture is needed for obtaining；High-low voltage framing display module, for will be shown per two field picture by former and later two subframes, and the first subframe The driving voltage of pixel is more than the driving voltage of same pixel in the second subframe；Benchmark backlight illumination module, it is described per the corresponding benchmark backlight illumination signal of two field picture for obtaining；Backlight compensation determining module, color of object sub-pixel is in each block in the input signal for counting every two field picture Peak signal and minimum signal, and the backlight illumination that each region corresponds to two subframes respectively is calculated according to equation below The size of thermal compensation signal：LL＜ L ＜ LH；PTH×L+PTL× L=PTH×LL+PTL×LH；P′TH×L+P′TL× L=P 'TH×LL+P′TL×LH；Wherein, LLFor the brightness value of the backlight illumination thermal compensation signal of first subframe, LHFor the backlight illumination of second subframe The brightness value of thermal compensation signal, PTHFor first driving voltage, PTLFor second driving voltage, P 'THFor the described 3rd driving Voltage, P 'TLFor the 4th driving voltage, L is the brightness value of the benchmark backlight illumination signal；AndBacklight illumination adjusts module, for adjusting the emitting brightness in each region according to the backlight illumination thermal compensation signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711367629.XA CN107978282A (en) | 2017-12-18 | 2017-12-18 | Display device and its driving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711367629.XA CN107978282A (en) | 2017-12-18 | 2017-12-18 | Display device and its driving method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107978282A true CN107978282A (en) | 2018-05-01 |
Family
ID=62006831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711367629.XA Pending CN107978282A (en) | 2017-12-18 | 2017-12-18 | Display device and its driving method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107978282A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108806625A (en) * | 2018-05-04 | 2018-11-13 | 惠州市华星光电技术有限公司 | A kind of driving method and device of multi-zone vertical alignment nematic mode liquid crystal display panel |
| CN108831399A (en) * | 2018-07-25 | 2018-11-16 | 深圳市华星光电技术有限公司 | Display driving method and liquid crystal display device |
| CN109003583A (en) * | 2018-09-18 | 2018-12-14 | 惠科股份有限公司 | Display device and its driving method |
| CN109036297A (en) * | 2018-09-18 | 2018-12-18 | 惠科股份有限公司 | Display device and its driving method |
| CN109308883A (en) * | 2018-11-28 | 2019-02-05 | 惠科股份有限公司 | The voltage compensating method of display panel |
| CN111540324A (en) * | 2020-05-20 | 2020-08-14 | Tcl华星光电技术有限公司 | Display device and pixel compensation method and device thereof |
| CN112511761A (en) * | 2020-11-23 | 2021-03-16 | Oppo广东移动通信有限公司 | Curved screen display compensation method, device, equipment, storage medium and shooting equipment |
| CN113516953A (en) * | 2021-06-23 | 2021-10-19 | 惠科股份有限公司 | Driving method of backlight module and display device |
| CN114035757A (en) * | 2021-03-09 | 2022-02-11 | 重庆康佳光电技术研究院有限公司 | Dead pixel compensation method and device, computer readable storage medium and electronic equipment |
| CN114203117A (en) * | 2020-09-02 | 2022-03-18 | 奇景光电股份有限公司 | Local dimming method and display device |
| CN114420059A (en) * | 2021-12-31 | 2022-04-29 | 海宁奕斯伟集成电路设计有限公司 | Backlight control method and device and display equipment |
| WO2023226017A1 (en) * | 2022-05-27 | 2023-11-30 | 京东方科技集团股份有限公司 | Light-emitting substrate and display apparatus |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002149132A (en) * | 2000-11-13 | 2002-05-24 | Mitsubishi Electric Corp | Liquid crystal display device |
| CN101281730A (en) * | 2008-03-20 | 2008-10-08 | 青岛海信电器股份有限公司 | Liquid crystal display method |
| CN103514839A (en) * | 2013-09-23 | 2014-01-15 | 西安交通大学 | Side-in-type LED backlight source liquid crystal display dynamic dimming method and device |
| CN104658502A (en) * | 2015-03-09 | 2015-05-27 | 深圳市华星光电技术有限公司 | Driving method and driving device of liquid crystal display |
| CN106782377A (en) * | 2016-12-27 | 2017-05-31 | 惠科股份有限公司 | Liquid crystal display device and its driving method |
| CN106782375A (en) * | 2016-12-27 | 2017-05-31 | 惠科股份有限公司 | Liquid crystal display device and its driving method |
| CN106847205A (en) * | 2016-12-27 | 2017-06-13 | 惠科股份有限公司 | Liquid crystal display device and its driving method |
-
2017
- 2017-12-18 CN CN201711367629.XA patent/CN107978282A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002149132A (en) * | 2000-11-13 | 2002-05-24 | Mitsubishi Electric Corp | Liquid crystal display device |
| CN101281730A (en) * | 2008-03-20 | 2008-10-08 | 青岛海信电器股份有限公司 | Liquid crystal display method |
| CN103514839A (en) * | 2013-09-23 | 2014-01-15 | 西安交通大学 | Side-in-type LED backlight source liquid crystal display dynamic dimming method and device |
| CN104658502A (en) * | 2015-03-09 | 2015-05-27 | 深圳市华星光电技术有限公司 | Driving method and driving device of liquid crystal display |
| CN106782377A (en) * | 2016-12-27 | 2017-05-31 | 惠科股份有限公司 | Liquid crystal display device and its driving method |
| CN106782375A (en) * | 2016-12-27 | 2017-05-31 | 惠科股份有限公司 | Liquid crystal display device and its driving method |
| CN106847205A (en) * | 2016-12-27 | 2017-06-13 | 惠科股份有限公司 | Liquid crystal display device and its driving method |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108806625A (en) * | 2018-05-04 | 2018-11-13 | 惠州市华星光电技术有限公司 | A kind of driving method and device of multi-zone vertical alignment nematic mode liquid crystal display panel |
| CN108831399B (en) * | 2018-07-25 | 2020-11-24 | 深圳市华星光电技术有限公司 | Display driving method and liquid crystal display device |
| CN108831399A (en) * | 2018-07-25 | 2018-11-16 | 深圳市华星光电技术有限公司 | Display driving method and liquid crystal display device |
| CN109036297A (en) * | 2018-09-18 | 2018-12-18 | 惠科股份有限公司 | Display device and its driving method |
| WO2020056893A1 (en) * | 2018-09-18 | 2020-03-26 | 惠科股份有限公司 | Display device and driving method therefor |
| WO2020056885A1 (en) * | 2018-09-18 | 2020-03-26 | 惠科股份有限公司 | Display device and method for driving same |
| CN109003583A (en) * | 2018-09-18 | 2018-12-14 | 惠科股份有限公司 | Display device and its driving method |
| US11205393B2 (en) | 2018-09-18 | 2021-12-21 | HKC Corporation Limited | Display device and driving method therefor |
| US11355075B2 (en) | 2018-09-18 | 2022-06-07 | HKC Corporation Limited | Display device and method for driving same |
| CN109308883A (en) * | 2018-11-28 | 2019-02-05 | 惠科股份有限公司 | The voltage compensating method of display panel |
| CN109308883B (en) * | 2018-11-28 | 2020-10-27 | 惠科股份有限公司 | Voltage compensation method of display panel |
| CN111540324A (en) * | 2020-05-20 | 2020-08-14 | Tcl华星光电技术有限公司 | Display device and pixel compensation method and device thereof |
| CN114203117A (en) * | 2020-09-02 | 2022-03-18 | 奇景光电股份有限公司 | Local dimming method and display device |
| CN114203117B (en) * | 2020-09-02 | 2022-10-21 | 奇景光电股份有限公司 | Local dimming method and display device |
| CN112511761A (en) * | 2020-11-23 | 2021-03-16 | Oppo广东移动通信有限公司 | Curved screen display compensation method, device, equipment, storage medium and shooting equipment |
| CN114035757A (en) * | 2021-03-09 | 2022-02-11 | 重庆康佳光电技术研究院有限公司 | Dead pixel compensation method and device, computer readable storage medium and electronic equipment |
| CN114035757B (en) * | 2021-03-09 | 2023-08-29 | 重庆康佳光电科技有限公司 | Method and device for compensating dead pixel, computer readable storage medium and electronic equipment |
| CN113516953A (en) * | 2021-06-23 | 2021-10-19 | 惠科股份有限公司 | Driving method of backlight module and display device |
| CN114420059A (en) * | 2021-12-31 | 2022-04-29 | 海宁奕斯伟集成电路设计有限公司 | Backlight control method and device and display equipment |
| CN114420059B (en) * | 2021-12-31 | 2023-12-12 | 海宁奕斯伟集成电路设计有限公司 | Backlight control method and device and display equipment |
| WO2023226017A1 (en) * | 2022-05-27 | 2023-11-30 | 京东方科技集团股份有限公司 | Light-emitting substrate and display apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107978282A (en) | Display device and its driving method | |
| US11355075B2 (en) | Display device and method for driving same | |
| CN106782375B (en) | Liquid crystal display device and its driving method | |
| US10580366B2 (en) | Liquid crystal display device and drive method therefor | |
| JP4612406B2 (en) | Liquid crystal display device | |
| KR101147100B1 (en) | Apparatus and method for driving liquid crystal display device | |
| US8456413B2 (en) | Display device, drive method therefor, and electronic apparatus | |
| CN108122544A (en) | Display device and its driving method | |
| KR101192779B1 (en) | Apparatus and method for driving of liquid crystal display device | |
| TWI413098B (en) | Display apparatus | |
| CN106847205B (en) | Liquid crystal display device and its driving method | |
| JP4594510B2 (en) | Transmission type image display device and driving method of transmission type image display device | |
| US20100225574A1 (en) | Image display device and image display method | |
| US20110115826A1 (en) | Image display device | |
| US11205393B2 (en) | Display device and driving method therefor | |
| WO2017028518A1 (en) | Method and device for eliminating ghost, and display | |
| GB2425674A (en) | Defect mitigation in display panels | |
| KR20080061772A (en) | Driving circuit for liquid crystal display device and method for driving the same | |
| US9368072B2 (en) | Image display device and image display method of a multi-display type with local and global control | |
| KR20080023414A (en) | Driving circuit for image display device and method for driving the same | |
| KR101011596B1 (en) | Image display device | |
| EP2109094A1 (en) | LCD inversion control | |
| TWI671725B (en) | Display device and method for displaying the same | |
| KR20130037538A (en) | Apparatus and method for correcting color of display device | |
| JP2011221172A (en) | Display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180501 |