CN105632443B - Mura phenomenon compensation methodes - Google Patents
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- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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Abstract
The present invention provides a kind of Mura phenomenons compensation method, LCD display panel is divided into multiple display subregions for including M row N row pixels, and the pixel of the 1st row the 1st row and the pixel of M/2+1 rows N/2+1 row is selected to preselect pixel as the first pre-selection pixel and second respectively in each display subregion, then according to the grey level compensation value of four first pre-selection pixels nearest around required pixel position, and the grey level compensation value of the second pre-selection pixel of subregion is shown where required pixel, calculate the grey level compensation value for showing required pixel in subregion；Wherein, it can accurately judge to show by the grey level compensation value of the second pre-selection pixel and whether there is tiny Mura in subregion, there is better compensation effect hence for the tiny Mura fallen in display subregion i.e. packed pixel region, while reducing hardware memory space consumption, it ensure that Mura compensation effects, product quality is improved, it is simple and fast.
Description
Technical field
The present invention relates to display technology field more particularly to a kind of Mura phenomenons compensation methodes.
Background technology
As liquid crystal display (Liquid Crystal Display, LCD) is sent out towards lighter, thinner, bigger direction
Exhibition, because of some uncontrollable factors on practical processing procedure, makes the physical characteristic of LCD display panel everywhere have differences, causes big
In the range of a pixel, when showing pure gray level image the phenomenon that brightness irregularities, i.e. so-called Mura phenomenons of industry.
Mura phenomenons have become the bottleneck for restricting LCD development.By improving technological level or improving material purity
The methods of can reduce the probability of happening of Mura phenomenons.For the LCD display panel (Panel) to have completed, physics is special
Property has been shaped, and the Mura phenomenons generated to make up the flaw on LCD processing procedures at this time can be by way of grey level compensation
Carry out the brightness of correction pixels point, and then improves Mura phenomenons.
Grey level compensation is to realize the improvement of brightness uniformity by changing the gray value of pixel：Shot by camera
Then the Mura situations of gray scale picture determine normal region and the regions Mura in gray level image, finally according to normal region
The gray value in the regions gray value Contrary compensation Mura applies the relatively high pixel of display brightness when showing pure gray level image
Add lower gray value, for the relatively low pixel of display brightness, apply higher gray value so that each pixel after grey level compensation
Brightness close to consistent, realize the improvement of Mura phenomenons.
As shown in Figs. 1-2, Mura offset datas (gray value for reducing or improving) are stored in LCD display panel one by one
In the flash storage (flash memory) of collocation, current general way is to do to compress with the region of 8 × 8 pixels (64 pixels), is surpassed
The Panel that high definition (ultra high definition, UHD) is differentiated, a total of 3840 × 2160 pixels pass through 8 × 8 pictures
The compression (the Mura offset datas for only storing each 8 × 8 pixel region top left corner apex pixel) of element then one coexists in Flash
The Mura offset datas of 481 × 271 pixels are stored up, TCON (screen driving plate) obtains the Mura offset datas of 481 × 271 pixels
Afterwards, the Mura offset datas of remaining each pixel are calculated by linear interpolation, any pixel point is (with a left side in 8 × 8 pixel regions
Upper angular vertex pixel Transverse, advance are from respectively X, Y) Mura offset G, the Mura offsets with its top left corner apex pixel
Mura offsets B, C, D of the top left corner apex pixel of A and adjacent three 8 × 8 pixel regions are related, i.e. G=[(8-X) * E+
X*F]/8, wherein E=[(8-Y) * A+Y*D]/8, F=[(8-Y) * B+Y*C]/8.
If Mura offsets be A, B, C, D four vertex offset difference less (mutual difference be less than 1 gray scale
Value) when, then the offset data difference being calculated in entire 8 × 8 pixel region is very small, i.e., bright invisible subsidy in this area is repaid
No significant difference；If as shown in figure 3, actually with the presence of tiny Mura and just inside this 8 × 8 pixel region when, root
After being compensated according to A, B, C, D numerical computations, the bright dark difference of the positions Mura and surrounding still has, and does not obtain effective compensation.
Invention content
It is tiny in packed pixel region for falling the purpose of the present invention is to provide a kind of Mura phenomenons compensation method
Mura has better compensation effect, while reducing hardware memory space consumption, ensures Mura compensation effects, promotes product product
Matter, it is simple and fast.
To achieve the above object, the present invention provides a kind of Mura phenomenons compensation method, includes the following steps：
Step 1 provides a LCD display panel, and the LCD display panel is divided into multiple displays in array arrangement
Subregion, if M, N are the even number more than 1, each display subregion includes M rows, N row pixels, and LCD display panel boundary is not
Sufficient M × N number of pixel is considered as a boundary and shows subregion；
Step 2, selected respectively in each display subregion including M × N number of pixel the 1st row the 1st arrange pixel and
The pixel of M/2+1 rows N/2+1 row passes through Mura analytical equipments as the first pre-selection pixel and the second pre-selection pixel
The grey level compensation value of the first pre-selection pixel and the second pre-selection pixel is obtained respectively；
Step 3, the position for determining required pixel, according to four nearest around required pixel position according to suitable
The second of display subregion is pre- where grey level compensation value A, B, C, D and required pixel of first pre-selection pixel of clocking sequence
The grey level compensation value Z for selecting pixel calculates non-boundary and shows that grey level compensation the value G, wherein A of required pixel in subregion are required
The grey level compensation value that the first pre-selection pixel of subregion is shown where pixel, specifically includes following steps：
Step 31 judges whether absolute difference between four grey level compensation values A, B, C, the D is respectively less than tiny Mura and sentences
Disconnected value, the tiny Mura judgment values are i gray value, and i is positive integer；If so, carrying out step 32；If it is not, then by following
Formula calculates the grey level compensation value of required pixel：G=[(N-X) * E+X*F]/N, wherein E=[(M-Y) * A+Y*D]/M, F=
[(M-Y) * B+Y*C]/M, X are that required pixel preselects pixel in the display subregion with first in display subregion where it
Columns it is poor, Y is required pixel and the first line number of the pre-selection pixel in the display subregion for being shown where it in subregion
Difference；
Step 32 judges whether antipode values of the grey level compensation value Z respectively between grey level compensation value A, B, C, D be small
In tiny Mura judgment values；If so, calculating the grey level compensation value of required pixel by following formula：G=[(N-X) * E+X*
F]/N, wherein E=[(M-Y) * A+Y*D]/M, F=[(M-Y) * B+Y*C]/M, X are required pixel and display subregion where it
In the first columns of the pre-selection pixel in the display subregion it is poor, Y be required pixel with shown where it in subregion the
Line number of the one pre-selection pixel in the display subregion is poor；If it is not, then carrying out step 33；
The display subregion is divided into four equal-sized sub- display subregions by step 33, will be where required pixel
Four of display subregion show that subregions are aobvious by the first, second, third, fourth son is denoted as successively clockwise by the upper left corner
Show subregion, the pixel for defining the upper left corner in the sub- display subregion is the first pixel, and as follows required by calculating
The grey level compensation value of pixel：G=[(N/2-X ') * E '+X ' * F ']/N/2, wherein E '=[(M/2-Y ') * A '+Y ' * D ']/M/
2, F '=[(M/2-Y ') * B '+Y ' * C ']/M/2, X ' are required pixel and the first pixel in son display subregion where it
Columns in the sub- display subregion is poor, and Y ' is required pixel and sub the first pixel shown in subregion where it in the son
Show that the line number in subregion is poor, in addition,
If required sub-pixel point be located at first son show subregion, A '=A, B '=(A+B)/2, C '=Z, D '=(A+D)/
2,
If required sub-pixel point be located at second son show subregion, A '=(A+B)/2, B '=B, C '=(B+C)/2, D '=
Z,
If required sub-pixel point be located at third show subregion, A '=Z, B '=(B+C)/2, C '=C, D '=(C+D)/
2,
If required sub-pixel point be located at the 4th son show subregion, A '=(A+D)/2, B '=Z, C '=(C+D)/2, D '=
D。
M and N are equal in the step 1.
M and N is 8 in the step 1
Mura analytical equipments in the step 2 are CCD camera.
Tiny Mura judgment values in the step 3 are 1 gray scale.
In the step 2 provide eight memories, respectively first, second, third, fourth, the five, the six, the 7th and
8th memory, for the array being made of multiple the first pre-selection pixels in array arrangement, the first memory is used
It is located at odd number for storing positioned at the grey level compensation value of the first pre-selection pixel of odd-numbered line odd column, second memory in storage
The grey level compensation value of first pre-selection pixel of row even column, third memory are used to store first positioned at even number line odd column
Preselect the grey level compensation value of pixel, the 4th memory is used to store the ash for preselecting pixel positioned at the first of even number line even column
Spend offset；For the array being made of multiple the second pre-selection pixels in array arrangement, the 5th memory is used for
Storage is located at odd-numbered line positioned at the grey level compensation value of the second pre-selection pixel of odd-numbered line odd column, second memory for storing
The second pre-selection grey level compensation value of pixel of even column, third memory be used to store positioned at even number line odd column second in advance
The grey level compensation value of pixel, the 4th memory is selected to be used to store the gray scale for preselecting pixel positioned at the second of even number line even column
Offset.
The memory is flash storage.
Beneficial effects of the present invention：The present invention provides a kind of Mura phenomenons compensation methodes, and LCD display panel is divided into
Multiple display subregions for including M row N row pixels, and it is each display subregion in select respectively the 1st row the 1st arrange pixel and
The pixel of M/2+1 rows N/2+1 row is as the first pre-selection pixel and the second pre-selection pixel, then according to required pixel
Around point position subregion is shown where the grey level compensation value of four first nearest pre-selection pixels and required pixel
The grey level compensation value of second pre-selection pixel, calculates the grey level compensation value for showing required pixel in subregion；Wherein, pass through second
The grey level compensation value of pre-selection pixel, which can accurately judge to show, whether there is tiny Mura in subregion, hence for falling
Tiny Mura in display subregion, that is, packed pixel region has better compensation effect, and the consumption for reducing hardware memory space is same
When, it ensure that Mura compensation effects, improve product quality, it is simple and fast.
Description of the drawings
Below in conjunction with the accompanying drawings, it is described in detail by the specific implementation mode to the present invention, technical scheme of the present invention will be made
And other advantageous effects are apparent.
In attached drawing,
Fig. 1 is the schematic diagram of existing Mura phenomenons compensation method；
Fig. 2 is the schematic diagram with tiny Mura in the packed pixel region of Fig. 1；
Fig. 3 is the flow chart of the Mura phenomenon compensation methodes of the present invention；
Fig. 4 shows subregion and the first and second pre-selections to be divided to display panel in the Mura phenomenon compensation methodes of the present invention
The schematic diagram of pixel；
Fig. 5 is that the Mura phenomenon compensation method neutrons of the present invention show the schematic diagram of subregion and the first pixel.
Specific implementation mode
Further to illustrate the technological means and its effect of the invention taken, below in conjunction with the preferred implementation of the present invention
Example and its attached drawing are described in detail.
Fig. 3-4 is please referred to, the present invention provides a kind of Mura phenomenons compensation method, includes the following steps：
Step 1 provides a LCD display panel, and the LCD display panel is divided into multiple displays in array arrangement
Subregion, if M, N are the even number more than 1, each display subregion includes M rows, N row pixels, and LCD display panel boundary is not
Sufficient M × N number of pixel is considered as a boundary and shows subregion；Below by taking the display subregion of 8 × 8 pixels as an example, i.e. M and N phases
Etc. being 8.
Step 2, selected respectively in each display subregion for including 8 × 8 pixels the 1st row the 1st arrange pixel and
The pixel of 5th row the 5th row passes through Mura analytical equipment CCD phases as the first pre-selection pixel p and the second pre-selection pixel q
Machine obtains the grey level compensation value of the first pre-selection pixel p and the second pre-selection pixel q respectively；
Specifically, the K gray scale including 0 gray scale and maximum gray scale is chosen, K is positive integer, by 0 to maximum gray scale point
For K-1 gray scale interval, the first pre-selection pixel p is obtained in the step 2 and the second pre-selection pixel q is grey at this K
The grey level compensation value of degree, it is preferred that the maximum gray scale is 255 gray scales, i.e. K is 256.
Step 3, the position for determining required pixel, according to four nearest around required pixel position according to suitable
The second of display subregion is pre- where grey level compensation value A, B, C, D and required pixel of first pre-selection pixel p of clocking sequence
The grey level compensation value Z for selecting pixel q calculates non-boundary and shows that grey level compensation the value G, wherein A of required pixel in subregion are institute
The grey level compensation value of first pre-selection pixel p of display subregion where seeking pixel, specifically, the step 3 includes the following steps：
Step 31 judges whether absolute difference between four grey level compensation values A, B, C, the D is respectively less than tiny Mura and sentences
Disconnected value, specifically, the tiny Mura judgment values are 1 gray scale；If so, carrying out step 32；If it is not, then by following formula meter
Calculate the grey level compensation value of required pixel：G=[(8-X) * E+X*F]/8, wherein E=[(8-Y) * A+Y*D]/8, F=[(8-
Y) * B+Y*C]/8, X be required pixel with its where show subregion in first pre-selection pixel p in the display subregion
Columns is poor, and Y is required pixel and line numbers of the first pre-selection pixel p in the display subregion in display subregion where it
Difference；The grey level compensation value of required pixel is calculated by the method for linear interpolation；
Step 32 judges that absolute differences of the grey level compensation data Z respectively between the grey level compensation data A, B, C, D is
It is no to be respectively less than tiny Mura judgment values i.e. 1 gray scale；If so, calculating the grey level compensation value of required pixel by following formula：G
=[(8-X) * E+X*F]/8, wherein E=[(8-Y) * A+Y*D]/8, F=[(8-Y) * B+Y*C]/8, X be required pixel with
Show that columns of the first pre-selection pixel p in the display subregion in subregion is poor where it, Y is where required pixel and its
Show that line numbers of the first pre-selection pixel p in the display subregion in subregion is poor；If it is not, then carrying out step 33；
Step 33 please refers to Fig. 4 and combines Fig. 5, and the display subregion is divided into four equal-sized sub- displays point
Four of display subregion where required pixel are shown subregions by the upper left corner by being denoted as the successively clockwise by area
One, second, third, the 4th son show that subregion, i.e., the son that the display subregion of 8 × 8 pixels is divided into 44 × 4 pixels are aobvious
Show subregion, the pixel for defining the upper left corner in the sub- display subregion is the first pixel, and as follows required by calculating
The grey level compensation value of pixel：G=[(4-X ') * E '+X ' * F ']/4, wherein E '=[(4-Y ') * A '+Y ' * D ']/4, F '=
[(4-Y ') * B '+Y ' * C ']/4, X ' is required pixel and sub the first pixel shown in subregion where it in the sub- display
Columns in subregion is poor, and Y ' is required pixel and sub the first pixel shown in subregion where it in the sub- display subregion
Line number it is poor, in addition,
If required sub-pixel point be located at first son show subregion, A '=A, B '=(A+B)/2, C '=Z, D '=(A+D)/
2；
If required sub-pixel point be located at second son show subregion, A '=(A+B)/2, B '=B, C '=(B+C)/2, D '=
Z；
If required sub-pixel point be located at third show subregion, A '=Z, B '=(B+C)/2, C '=C, D '=(C+D)/
2；
If required sub-pixel point be located at the 4th son show subregion, A '=(A+D)/2, B '=Z, C '=(C+D)/2, D '=
D。
Specifically, in the step 2 provide eight memories, respectively first, second, third, fourth, the five, the 6th,
7th and the 8th memory, for by multiple the first arrays for forming of pre-selection pixel p in array arrangement, described first
Memory is used to store the grey level compensation value of the first pre-selection pixel p positioned at odd-numbered line odd column, second memory for depositing
Put the grey level compensation value of the first pre-selection pixel p positioned at odd-numbered line even column, third memory is located at even number line for storing
The grey level compensation value of first pre-selection pixel p of odd column, the 4th memory are used to store first positioned at even number line even column
Preselect the grey level compensation value of pixel p；For the array being made of multiple the second pre-selection pixel q in array arrangement, institute
State grey level compensation value, second memory of the 5th memory for storing the second pre-selection pixel q for being located at odd-numbered line odd column
For storing the grey level compensation value for the second pre-selection pixel q for being located at odd-numbered line even column, third memory is located at for storing
The grey level compensation value of second pre-selection pixel q of even number line odd column, the 4th memory are located at even number line even column for storing
The second pre-selection pixel q grey level compensation value.
Specifically, the memory is flash storage.
In conclusion the Mura phenomenon compensation methodes of the present invention, it includes M row N row pictures that LCD display panel, which is divided into multiple,
The display subregion of vegetarian refreshments, and the pixel and M/2+1 rows N/2+1 for selecting the 1st row the 1st to arrange respectively in each display subregion
The pixel of row as first pre-selection pixel and second pre-selection pixel, then according to around required pixel position most
The second pre-selection pixel of subregion is shown where the grey level compensation value of four first close pre-selection pixels and required pixel
Grey level compensation value calculates the grey level compensation value for showing required pixel in subregion；Wherein, pass through the gray scale of the second pre-selection pixel
Offset, which can accurately judge to show, whether there is tiny Mura in subregion, be compressed in display subregion hence for falling
Tiny Mura in pixel region has better compensation effect, while reducing hardware memory space consumption, ensure that Mura is mended
Effect is repaid, product quality is improved, it is simple and fast.
The above for those of ordinary skill in the art can according to the technique and scheme of the present invention and technology
Other various corresponding change and deformations are made in design, and all these change and distortions should all belong to the claims in the present invention
Protection domain.
Claims (7)
1. a kind of Mura phenomenons compensation method, includes the following steps：Step 1 provides a LCD display panel, and the LCD is shown
Panel is divided into multiple display subregions in array arrangement, if M, N are the even number more than 1, each display subregion includes M
Row, N row pixels, LCD display panel boundary are considered as a boundary less than M × N number of pixel and show subregion；Step 2, every
It selects the pixel that the 1st row the 1st arranges as the first pre-selection pixel (p) in a display subregion including M × N number of pixel, leads to
Cross the grey level compensation value that Mura analytical equipments obtain the first pre-selection pixel (p), which is characterized in that step 2 further includes：
Select the pixel that M/2+1 rows N/2+1 is arranged as the second pre-selection picture in each display subregion including M × N number of pixel
Vegetarian refreshments (q) obtains the grey level compensation value of the second pre-selection pixel (q) by Mura analytical equipments；
Further include step 3, determine the position of required pixel, according to four nearest around required pixel position according to
The of subregion is shown where grey level compensation value A, B, C, D and required pixel of first pre-selection pixel (p) of clock-wise order
The grey level compensation value Z of two pre-selection pixels (q) calculates the grey level compensation value G that non-boundary shows required pixel in subregion, wherein
A is the grey level compensation value of the first pre-selection pixel (p) of display subregion where required pixel, specifically includes following steps：
Step 31 judges whether the absolute difference between four grey level compensation values A, B, C, the D is respectively less than tiny Mura judgment values,
The tiny Mura judgment values are i gray value, and i is positive integer；If so, carrying out step 32；If it is not, then by following formula meter
Calculate the grey level compensation value of required pixel：G=[(N-X) * E+X*F]/N, wherein E=[(M-Y) * A+Y*D]/M, F=[(M-
Y) * B+Y*C]/M, X is that required pixel preselects pixel (p) in the display subregion with first in display subregion where it
Columns it is poor, Y is required pixel and first pre-selection pixel (p) row in the display subregion for being shown where it in subregion
Number is poor；
Step 32 judges whether absolute differences of the grey level compensation value Z respectively between grey level compensation value A, B, C, D be respectively less than tiny
Mura judgment values；If so, calculating the grey level compensation value of required pixel by following formula：G=[(N-X) * E+X*F]/N,
In, E=[(M-Y) * A+Y*D]/M, F=[(M-Y) * B+Y*C]/M, X be required pixel with shown where it in subregion the
Columns of the one pre-selection pixel (p) in the display subregion is poor, and Y is that required pixel and first in display subregion where it are pre-
Select line number of the pixel (p) in the display subregion poor；If it is not, then carrying out step 33；
The display subregion is divided into four equal-sized sub- display subregions by step 33, will be aobvious where required pixel
Show that four of subregion show subregions by the upper left corner by being denoted as the first, second, third, fourth son display point successively clockwise
Area, the pixel for defining the upper left corner in the sub- display subregion are the first pixel, and calculate required pixel as follows
The grey level compensation value of point：G=[(N/2-X ') * E '+X ' * F ']/N/2, wherein E '=[(M/2-Y ') * A '+Y ' * D ']/M/2, F '
=[(M/2-Y ') * B '+Y ' * C ']/M/2, X ' are required pixel and sub the first pixel shown in subregion where it at this
Son shows that the columns in subregion is poor, and Y ' shows the first pixel in subregion in the sub- display for required pixel and son where it
Line number in subregion is poor, in addition,
If required pixel, which is located at the first son, shows subregion, A '=A, B '=(A+B)/2, C '=Z, D '=(A+D)/2；
If required pixel, which is located at the second son, shows subregion, A '=(A+B)/2, B '=B, C '=(B+C)/2, D '=Z；
If required pixel, which is located at third, shows subregion, A '=Z, B '=(B+C)/2, C '=C, D '=(C+D)/2；
If required pixel, which is located at the 4th son, shows subregion, A '=(A+D)/2, B '=Z, C '=(C+D)/2, D '=D.
2. Mura phenomenons compensation method as described in claim 1, which is characterized in that M and N are equal in the step 1.
3. Mura phenomenons compensation method as claimed in claim 2, which is characterized in that M and N is 8 in the step 1.
4. Mura phenomenons compensation method as described in claim 1, which is characterized in that Mura analytical equipments are in the step 2
CCD camera.
5. Mura phenomenons compensation method as described in claim 1, which is characterized in that the tiny Mura in the step 3 judges
Value is 1 gray scale.
6. Mura phenomenons compensation method as described in claim 1, which is characterized in that eight memories are provided in the step 2,
The memory of respectively first, second, third, fourth, the five, the six, the 7th and the 8th, for being arranged in array by multiple
First pre-selection pixel (p) form array, the first memory be used for store positioned at odd-numbered line odd column first in advance
The grey level compensation value of pixel (p), second memory is selected to be used to store the first pre-selection pixel (p) for being located at odd-numbered line even column
Grey level compensation value, third memory be used for store positioned at even number line odd column first preselect pixel (p) grey level compensation
Value, the 4th memory are used to store the grey level compensation value of the first pre-selection pixel (p) positioned at even number line even column；For by more
The array that a the second pre-selection pixel (q) in array arrangement forms, the 5th memory are located at odd-numbered line for storing
The grey level compensation value of second pre-selection pixel (q) of odd column, second memory, which are used to store, is located at the of odd-numbered line even column
The grey level compensation value of two pre-selection pixels (q), third memory are used to store the second pre-selection pixel positioned at even number line odd column
The grey level compensation value of point (q), the 4th memory are used to store the gray scale of the second pre-selection pixel (q) positioned at even number line even column
Offset.
7. Mura phenomenons compensation method as claimed in claim 6, which is characterized in that the memory is flash storage.
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