CN107204175A - Pixel driving method and panel driving circuit - Google Patents
Pixel driving method and panel driving circuit Download PDFInfo
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- 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
- G09G3/3607—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 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
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Abstract
A pixel driving method and a panel driving circuit are provided, the pixel driving method is used for driving a display panel, the display panel is provided with a first pixel, and the method comprises the following steps. An input gray level value is received, the input gray level value defining a saturation. And setting a first corresponding value corresponding to the first pixel according to the input gray-scale value. And setting a first weight and a second weight according to the saturation, wherein the sum of the first weight and the second weight is a fixed value. The first pixel is driven according to a first output gray-scale value equal to the sum of the product of the first weight and the input gray-scale value and the product of the second weight and the first corresponding value. When the saturation is greater than the first critical value, the value of the first weight increases with the increase of the value of the saturation, and the maximum value of the first weight is less than 0.8. The invention also discloses a corresponding panel driving circuit.
Description
Technical field
Driven the invention relates to a kind of image element driving method, and in particular to a kind of pixel for improving color offset phenomenon
Dynamic method and panel drive circuit.
Background technology
Height contrast and wide viewing angle are the development trends of current large screen television.The limited viewing angle of general TV, more than one
During fixed viewing angle, audience's can visually produce cross-color and the difference of brightness.The manufacturer of current many TVs is all
It is directed to developing the wide viewing angle technology (wide view technology) of LCD TV, it divides the liquid crystal in same pixel region
Sub-district is divided into multiple different alignment fields, i.e. multiple domain (multi-domain), uses the display effect for reaching wide viewing angle.
However, the optical characteristics due to being limited to liquid crystal, such a liquid crystal display panel with wide visual angle is under different visual angles viewing
Can occur colour cast (Color Washout) phenomenon.In order to improve color offset phenomenon, the liquid crystal display panel of wide viewing angle is more by pixel
Multiple sub-pixels are respectively defined as, and the gamma curve come with spatial domain compensation technique between each sub-pixel of differentiation exports special
Property.Although effectively improving color offset phenomenon, also due to the colourity and brightness between each sub-pixel are differed, cause with same
The pixel of individual grey decision-making driving has aberration (Color Difference) situation so that it is equal that liquid crystal display panel is shown
Even color lump images visually also have grid speckle (Mesh).Further, since having used spatial domain compensation technique differentiation each
Sub-pixel, is likely to result in the discontinuous sense for visually experiencing picture of audience.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of image element driving method, to improve spatial domain compensation technique
In image quality.
According to an aspect of the invention, it is proposed that a kind of image element driving method, to drive display panel, display panel has
First pixel, method comprises the following steps.Input grey decision-making is received, this input grey decision-making defines saturation degree.According to input GTG
Value, corresponding first respective value of the first pixel of setting.First weight and the second weight are set according to saturation degree, the first weight and the
The summation of two weights is fixed value.First pixel is driven according to the first output grey decision-making, the first output grey decision-making is equal to the first power
Weight and the product of input grey decision-making and the totalling of the second weight and the product of the first respective value.Wherein, when saturation degree is more than the
During one critical value, the value of the first weight increases with the increase of the value of saturation degree, and the maximum of the first weight is less than 0.8.
According to another aspect of the invention, it is proposed that a kind of panel drive circuit, to display panel electric property coupling, display
Panel has the first pixel, and panel drive circuit includes grey decision-making generation circuit and drive circuit.Grey decision-making generation circuit is used
To receive input grey decision-making, and corresponding first respective value of the first pixel is set according to input grey decision-making, this input grey decision-making is determined
Adopted saturation degree.Drive circuit is used to set the first weight and the second weight according to saturation degree, and is driven according to the first output grey decision-making
Dynamic first pixel, it is corresponding with first with the product and the second weight for inputting grey decision-making that the first output grey decision-making is equal to the first weight
The totalling of the product of value.Wherein the summation of the first weight and the second weight is fixed value, when saturation degree is more than the first critical value,
The value of first weight increases with the increase of the value of saturation degree, and the maximum of the first weight is less than 0.8.
Below in conjunction with the drawings and specific embodiments, the present invention will be described in detail, but not as a limitation of the invention.
Brief description of the drawings
Fig. 1 is the pixel schematic diagram according to first embodiment of the invention；
Fig. 2 is the image element driving method flow chart according to first embodiment of the invention；
Fig. 3 is the panel drive circuit schematic diagram according to first embodiment of the invention；
Fig. 4 is the first weight and the relation schematic diagram of saturation degree according to first embodiment of the invention；
Fig. 5 is the spatial filter schematic diagram according to first embodiment of the invention.
Wherein, reference
200:Panel drive circuit
210:Grey decision-making generation circuit
220:Drive circuit
300:Display panel
D1:First respective value
N1:First critical value
N2:Second critical value
S100:Receive input grey decision-making
S102:According to input grey decision-making, corresponding first respective value of the first pixel of setting
S104:First weight and the second weight are set according to saturation degree
S106:First pixel is driven according to the first output grey decision-making, the first output grey decision-making is equal to the first weight and input
The totalling of the product of grey decision-making and the second weight and the product of the first respective value
wM:The maximum of first weight
Xin:Input grey decision-making
Z1:First output grey decision-making
Embodiment
The structural principle and operation principle of the present invention are described in detail below in conjunction with the accompanying drawings：
Homeotropic alignment liquid crystal (Vertical Alignment, VA) and stable twisted nematic (Twisted Nematic, TN) liquid
The crystalline phase contrast higher than having and wider array of visible angle, are the mainstream technologys that current large-screen liquid crystal display television is used.But VA
Liquid crystal display may have the shortcomings that big visual angle color is whitened, multi-domain technique progress of arranging in pairs or groups in recent years, can effectively reduce big visual angle
The shortcoming of colour cast.
For example, using spatial domain technique, the pixel of panel can be divided into mainly (Main) sub-pixel and auxiliary
(Sub) two kinds of forms of sub-pixel, allow the sub-pixel of two kinds of forms (Main and Sub) to have different gamma curve outputs special individually
Property.Although gamma curves different from Sub sub-pixels microcosmic lower Main is differed in big visual angle colour cast situation, on macroscopic
Main and Sub integrates color blending effect and is effectively reduced colour cast situation, lifts big visual angle color quality.And due to Gamma between pixel
Curve difference, may visually have an impression of water chestnut check, or on color lump it is easily discontinuous, cause visually significantly to break
Broken sense.
For example, each pixel on panel can have red (R) sub-pixel, green (G) sub-pixel and blueness
(B) sub-pixel.Fig. 1 is the pixel schematic diagram according to first embodiment of the invention.In one embodiment, the first pixel and the second picture
Element is displayed for same color lump images, that is, the color lump images that the first pixel and the second pixel are received have same gray level
Value.Other red sub-pixel, green sub-pixels and blue subpixels are with MSM patterns respectively in first pixel and the second pixel
With the driving of SMS patterns, wherein M represents Main sub-pixels, and S represents Sub sub-pixels.In the following description, for MSM types
The pixel of formula is referred to as A pixels, is referred to as B pixels for the pixel with SMS patterns.
Because Main sub-pixels and Sub sub-pixels system use different gamma curves, reduction colour cast can be so reached
Effect.Table one, which is listed, uses spatial domain technique, and grey decision-making differentiation Main sub-pixels and Sub sub-pixels are inputted for identical
Example, and use A pixels as described above and B dot structures.Value shown in table one is, for example, according to gamma curve function
Result obtained by calculating, in hardware implementation, can also use look-up table to store grey decision-making and output Main sub-pixels and Sub
The relation of sub-pixel, and A pixels and B pixels as shown in Table 1 can be obtained by lookup table mode and interpolative operation.
Table one
| Input rgb value | A pixels (MSM) | B pixels (SMS) |
| (R,G,B) | (M,S,M) | (S,M,S) |
| (192,8,8) | (228,3,11) | (150,12,3) |
| (192,96,96) | (228,18,132) | (150,133,17) |
| (192,192,192) | (228,149,227) | (150,228,147) |
And in one embodiment, more A pixels and B pictures can be adjusted according to this according to the saturation degree corresponding to input grey decision-making
The grey decision-making of element, to obtain more preferably display effect.Fig. 2 is refer to below and Fig. 3 illustrates embodiments of the invention.
Fig. 2 is the image element driving method flow chart according to first embodiment of the invention.Image element driving method is aobvious to drive
Show panel, display panel has the first pixel, and image element driving method comprises the following steps.
Step S100：Input grey decision-making Xin is received, this input grey decision-making Xin defines saturation degree S.
Step S102：According to input grey decision-making Xin, the corresponding first respective value D1 of the first pixel of setting.Step S104：Root
It is fixed value according to the saturation degree S summations for setting the first weight w1 and the second weight w2, the first weight w1 and the second weight w2.
Step S106：First pixel is driven according to the first output grey decision-making Z1, the first output grey decision-making Z1 is equal to the first power
The totalling of weight w1 and input grey decision-making Xin product and the second weight w2 and the first respective value D1 product.Wherein, saturation is worked as
When spending S more than the first critical value N1, the first weight w1 value increases with the increase of saturation degree S value, and the first weight w1
Maximum wM be less than 0.8.
Image element driving method of the collocation with reference to carried out by Fig. 2, Fig. 3 is the panel drive circuit according to first embodiment of the invention
Schematic diagram.Panel drive circuit 200 is used to have the first pixel, panel with the electric property coupling of display panel 300, display panel 300
Drive circuit 200 includes grey decision-making generation circuit 210 and drive circuit 220.Grey decision-making generation circuit 210 is to receive input
Grey decision-making Xin, and the corresponding first respective value D1 of the first pixel is set according to input grey decision-making Xin, this input grey decision-making Xin determines
Adopted saturation degree S.Drive circuit 220 can be used to calculate the corresponding saturation degree S of input grey decision-making Xin, and according to saturation degree S settings the
One weight w1 and the second weight w2, drive circuit 220 simultaneously drives the first pixel to export grey decision-making Z1 according to first, and first is defeated
Go out grey decision-making Z1 equal to the first weight w1 and input grey decision-making Xin product and multiplying for the second weight w2 and the first respective value D1
Long-pending totalling, drive circuit 220 can calculate the first output grey decision-making Z1.Wherein the first weight w1 and the second weight w2 summation is
Fixed value, when saturation degree S is more than the first critical value N1, the first weight w1 value increases with the increase of saturation degree S value,
And first weight w1 maximum wM be less than 0.8.
For the example with pixel with red sub-pixel, green sub-pixels and blue subpixels, input grey decision-making Xin determines
The saturation degree S of justice can be calculated according to following equation, and wherein Rin, Gin, Bin are the red defeated of input grey decision-making Xin respectively
Enter grey decision-making, green input grey decision-making, blueness input grey decision-making.
By taking the numerical value of table one as an example, the input grey decision-making (192,8,8) of first row, corresponding saturation degree S is 0.96, is belonged to
High saturation；The input grey decision-making (192,96,96) of secondary series, corresponding saturation degree S is 0.5, belongs to middle saturation degree；3rd
The input grey decision-making (192,192,192) of row, corresponding saturation degree S is 0, belongs to low saturation.Saturation degree S is calculated for example may be used
Performed by drive circuit 220.
Step S102 is according to input grey decision-making Xin, the corresponding first respective value D1 of the first pixel of setting.If inputting grey decision-making
Xin has red input grey decision-making, green input grey decision-making, blueness input grey decision-making, and as shown in Table 1, the first respective value D1 can
To be the value or the value of B pixels of A pixels shown in table one；If input grey decision-making Xin has single grey decision-making, the first respective value D1
It can be the value of A pixels or the one of sub-pixel of B pixels.Step S102 can be counted according to the function of gamma curve
Obtain and (use different gamma curves from Sub sub-pixels for Main sub-pixels), the table of comparisons can also have been pre-established,
Store grey decision-making and the first respective value D1 relation.
If the first pixel is single sub-pixel, with single grey decision-making, when the first pixel is shown as main pixel (Main)
When, the first respective value D1 is the first main respective value of the main gamma curve of correspondence；When the first pixel is shown as auxiliary pixel
(Sub) when, the first respective value D1 systems aid in respective value for the first of correspondence auxiliary gamma curve.Main gamma curve and auxiliary
Gamma curve is differed.If the first pixel has multiple sub-pixels, such as including tri- grey decision-makings of RGB, then as previously described may
It is to be shown or shown with B pixels (SMS) pattern with A pixels (MSM) pattern.When the first pixel is shown as A pixels, (MSM, can boundary
It is set to main pixel) when, the main respective value of the main gamma curve of R grey decision-makings correspondence therein, G grey decision-makings correspondence is aided in
The auxiliary respective value of gamma curve, the main respective value of the main gamma curve of B grey decision-makings correspondence；When the first pixel is shown as B
During pixel (SMS can be defined as auxiliary pixel), the auxiliary respective value of R grey decision-makings correspondence auxiliary gamma curve therein, G GTGs
The main respective value of the main gamma curve of value correspondence, the auxiliary respective value of B grey decision-makings correspondence auxiliary gamma curve.
Step S102 is for example as performed by grey decision-making generation circuit 210, and grey decision-making generation circuit 210 is, for example, look-up table electricity
Road, it is executable to table look-up and interpolative operation, or grey decision-making generation circuit 210 can perform function with mathematical operational ability
The circuit of computing, can be calculated by gamma curve function and obtain the first respective value D1.In following description, step S102 from
The step of input grey decision-making Xin is converted to the first respective value D1, can be referred to as spatial domain (Spatial Domain, SD) step.
Step S104 sets the first weight w1 and the second weight w2 according to saturation degree S.For example, the final institute of the first pixel
Corresponding first output grey decision-making Z1, can be determined according to both following：(1) the first respective value D1 after SD steps,
And the input grey decision-making Xin before (2) SD steps.And the first weight w1 corresponding respectively can input GTG with the second weight w2
Proportion shared by value Xin and the first respective value D1.First weight w1 and the second weight w2 summation are fixed value, in an embodiment
In, the first weight w1 and the second weight w2 summations are 1, and the present invention is not limited thereto certainly, the first weight w1 and the second weight w2
Summation can also be other constants.
Step S106 drives the first pixel according to the first output grey decision-making Z1, and the first output grey decision-making Z1 is equal to the first weight
The totalling of w1 and input grey decision-making Xin product and the second weight w2 and the first respective value D1 product, that is, Z1=w1 ×
Xin+w2 × D1, the first pixel is driven according to the output grey decision-making Z1 that calculating is obtained.Step S104 and step S106 can be by driving
Circuit 220 is performed.
First weight w1 is set according to saturation degree S.It is more than the first critical value N1 (for example, N1=in saturation degree S
0.7) when, it can be described as high saturation interval.Interval in high saturation, the first weight w1 value is with the increase of saturation degree S value
And increase, and the first weight w1 maximum wM is less than 0.8.That is, (such as saturation when saturation degree S reaches maximum saturation
Spend S=1), the maximum wM that the first weight w1 reaches is less than 0.8, represents when maximum saturation, and the first output grey decision-making Z1 is
By part be originally inputted grey decision-making Xin and partial the first respective value D1 (by SD steps are performed) is constituted.First weight w1
Maximum wM number range be, for example, 0.6~0.8.
With the data instance of table one, input grey decision-making Xin is (192,8,8), saturation degree S=0.96, if corresponding first power
Weight w1=0.7, the second weight w2=0.3, then the first output grey decision-making Z1=w1 × Xin+w2 of corresponding A pixels (MSM) ×
D1=0.7 × (192,8,8)+0.3 × (228,3,11)=(203,7,9), the first output GTG of corresponding B pixels (SMS)
Value Z1=0.7 × (192,8,8)+0.3 × (150,12,3)=(179,9,7).It can be seen that by the first weight w1 and the
After two weight w2 adjustment, the aberration that A pixels first output grey decision-making Z1 and B pixel first is exported between grey decision-making Z1 is reduced
(compared to the aberration between A pixels the first respective value D1 and the first respective value of B pixels D1).
Fig. 4 is the relation schematic diagram of the first weight w1 and saturation degree S according to first embodiment of the invention.Implement following
In example, the first weight w1 and the second weight w2 scope are 0 to 1, and the first weight w1 and the second weight w2 summation are 1, but
These numerals are merely illustrative, and can also use other constants.Saturation degree S scope is, for example, 0 to 1, when saturation degree S is big
Interval in the first critical value N1 high saturation, the first weight w1 value increases with the increase of saturation degree S value, works as saturation
When spending S equal to saturation degree maximum (being 1 in this example), the maximum wM of saturation degree S correspondences to the first weight w1 (is, for example,
0.7).In this embodiment, in the first weight w1 of high saturation interval value with saturation degree S value it is linearly increasing, but simultaneously
Not limited to this, the first weight w1 value can also be with saturation degree S value rather than linearly increasing.
When saturation degree S is less than the second critical value N2 (such as N2=0.3), low saturation interval, the first weight can be described as
W1 value is reduced with the increase of saturation degree S value, is, for example, linear reduction, but is also not limited to this, and the second critical value N2 is less than
First critical value N1.When saturation degree S is equal to saturation degree minimum value (being 0 in this example), the first weight w1 is substantially equal to weight
Maximum (being 1 in this example).This weight maximum is equal to the fixed value of the first weight w1 and the second weight w2 summations.Work as saturation degree
When S is 0, the first weight w1=1, the second weight w2=0 are equivalently employed without carrying out SD steps, the first output grey decision-making Z1 is equal to
Original input grey decision-making Xin.
In this embodiment, when saturation degree S is between the second critical value S2 and the first critical value S1, saturation in being referred to as
Degree is interval, and the first weight w1 is substantially equal to weight minimum value, i.e. the first weight w1 maintains a definite value.In one embodiment,
This weight minimum value is equal to 0, and in other embodiments, this weight minimum value can also be other numerical value.Example as shown in Figure 4
Son, as saturation degree S=0.5, the first weight w1=0, the second weight w2=1, represents the first output grey decision-making Z1 equal to first pair
Should value D1.In other embodiments, interval in middle saturation degree, the first weight w1 can also be linear with saturation degree S value
Change, this sentences the first weight w1 and maintains fixed value to illustrate.
The relation of saturation degree S and the first weight w1 as carried out by Fig. 4, can use following formula subrepresentation：
As 0≤S≤N2
W1=0 works as N2≤S≤N1
When N1≤S≤1, wherein wMRepresent in high saturation interval, the first weight w1 is most
Big value.
First weight w1 and the second weight w2 is set according to saturation degree S, can be calculated according to above-mentioned multiple formulas, or
Saturation degree S and the first weight w1 corresponding relation in another embodiment, can be stored in look-up table by person.If such as first
Weight w1 and saturation degree S relation is all not linear correlation in each saturation degree interval, then look-up table can be used advance
Store corresponding relation.Drive circuit 220 as shown in Figure 3 can include storing the first weight w1 and saturation degree S corresponding relations
Look-up table, or according to saturation degree S can calculate the first weight w1 according to foregoing multiple formulas.
It is interval and low in high saturation as described above, after the first weight w1 and the second weight w2 adjustment
Saturation degree is interval, because the first weight w1>0, A pixel first output grey decision-making Z1 and B pixel first is exported between grey decision-making Z1
Aberration reduce (compared to the aberration between A pixels the first respective value D1 and the first respective value of B pixels D1)；In middle saturation degree
Interval, because the first weight w1=0, A pixel first output grey decision-making Z1 and B pixel first exports the aberration between grey decision-making Z1
Remain unchanged (compared to the aberration between A pixels the first respective value D1 and the first respective value of B pixels D1).When the same color of display
The pixel of block image by perform SD steps respectively with A pixels and B pixel drivers when, colour cast of the color lump images on big visual angle show
As that can improve, but the grid speckle phenomena of color lump images is more obvious.Due to visual angle of the human eye for high and low saturation degree color
Colour cast is less sensitive, therefore by the display difference of A pixels and B pixels in high and low saturation degree interval is reduced, can not only cause
Color offset phenomenon is reduced at big visual angle, the grid marking problems of color lump images can also be improved.
On the other hand, when the characteristic that there is the color saturation in image frame high frequency to switch, and audience is in low coverage
During from checking image picture, then discontinuous sense may be visually produced.Image frame when closely being inspected to be maintained at
Continuity, solution performs the ratio of SD steps for increase high saturation color, that is, corresponds to the full in height of foregoing teachings
The first weight maximum wM is set as less than 0.8 with degree interval., all can be to a certain degree when so can closely to view and admire
See the grid class line produced by SD steps, and keep the continuity of picture.
The first weight w1 as shown in Figure 4 and saturation degree S corresponding relation, its parameter setting (such as the first weight w1 in
The interval maximum wM of high saturation) it can experience according to human vision and set, color contrast susceptibility can be used herein
(Contrast Sensitivity) is analyzed.For given gamma curve, in specific size of display panels (for example
60 inch panels), and distance (such as within panel 60cm) is specifically viewed and admired, carry out different first weight maximum wM's
Simulation and experiment.Calculate interval in high saturation, the corresponding contrast of display picture produced by different first weight maximum wM is quick
Sensitivity.Find out the first weight maximum wM that CSF can be caused to be less than a critical value so that human eye can be seen
To grid speckle, and maintain picture continuous.Through simulation with after experiment, can obtain the first weight maximum wM and be less than 0.8, such as may be used
To be 0.6~0.8 numerical value.
And it is interval in low saturation, all it is to be located at grid speckle visual field because most of weak colour is color, therefore it is low full
Do not feel more discontinuously with color image, therefore as shown in figure 4, when saturation degree S is close to 0, the first weight w1 close to 1,
Equivalent to SD steps are almost not carried out, also it is able to maintain that picture is continuous.
The discontinuous problem of the big block of display picture can be solved according to aforesaid way, and for there is minority at small area
Pixel change is too fast, forms picture excessively sharp keen situation, then can use spatial filter.In one embodiment, such as Fig. 3 institutes
The display panel 300 shown has more multiple second pixels, and the second pixel more may include adjacent to the first pixel, image element driving method：
The first weight w1 corresponding to the first pixel is adjusted according to the first weight w1 corresponding to the second pixel using spatial filter.Institute
The spatial filter used does not limit type, in one embodiment, and spatial filter is smoothing filter, e.g. LPF
Device, the composition to suppress excessively high frequency reduces sharp keen degree so that the corresponding first weight w1 changes of each pixel are more put down
It is sliding.
Fig. 5 is the spatial filter schematic diagram according to first embodiment of the invention, the spatial filter used in this
For the mean filter of one 3 × 3.As shown in figure 5, middle for the corresponding first weight w1 of the first pixel, for example, 1, surrounding 8
Numerical value as shown in Figure 5 the first weight w1 corresponding to individual neighborhood pixels (the second pixel), it can be seen that first between each pixel
Weight change is more violent.(9 pixels centered on the first pixel are for example calculated after 3 × 3 mean filter processing
The first weight w1 of correspondence average value), the corresponding first weight w1 of the first pixel changes into 0.2, slow down excessively sharp in picture
The first weight change situation of profit.
Spatial filter used in this example is merely illustrative, in other embodiment, spatial filter it is big
It is small to be not limited to 3 × 3, can also be other sizes, or can also be carried out according to the pixel of the first pixel up and down
Space filtering, shape is not limited to square.In addition, spatial filter is also not limited to be mean filter, it can use
Other smoothing operation modes, for example, can be the space for giving different weights from the pixel that the first pixel distance is differed
Wave filter, or can for example use median spatial filter.
As described in above example of the present invention, it can be determined according to the color saturation of image using spatial domain technique step
Weight, not only improves the color offset phenomenon on big visual angle, and improves the grid marking problems of color lump images, and by being set in
The first interval weight maximum of high saturation, can keep the continuity of image frame when audience closely views and admires.This
Outside, application space filter process, can slow down excessively sharp keen the first weight change, also can effectively be apt to the company of display picture
Continuous property.
Certainly, the present invention can also have other various embodiments, ripe in the case of without departing substantially from spirit of the invention and its essence
Various corresponding changes and deformation, but these corresponding changes and change ought can be made according to the present invention by knowing those skilled in the art
Shape should all belong to the protection domain of appended claims of the invention.
Claims (20)
1. a kind of image element driving method, to drive a display panel, the display panel has one first pixel, and its feature exists
In this method includes：
Receive one and input grey decision-making, the input grey decision-making defines a saturation degree；
According to the input grey decision-making, corresponding one first respective value of first pixel is set；
According to the saturation degree one first weight of setting and one second weight, the summation of first weight and second weight is consolidated for one
Definite value；
First pixel is driven according to one first output grey decision-making, the first output grey decision-making is equal to first weight and the input
The totalling of the product of grey decision-making and second weight and the product of first respective value；And
Wherein, when the saturation degree is more than first critical value, the value of first weight is with the increase of the value of the saturation degree
Increase, and the maximum of first weight is less than 0.8.
2. image element driving method as claimed in claim 1, it is characterised in that when the saturation degree is equal to a saturation degree maximum
When, the maximum of saturation degree correspondence to first weight.
3. image element driving method as claimed in claim 1, it is characterised in that when the saturation degree is less than second critical value,
The value of first weight is reduced with the increase of the value of the saturation degree, and second critical value is less than first critical value.
4. image element driving method as claimed in claim 3, it is characterised in that when the saturation degree is equal to a saturation degree minimum value
When, first weight is equal to a weight maximum.
5. image element driving method as claimed in claim 4, it is characterised in that the weight maximum is equal to the fixed value.
6. image element driving method as claimed in claim 3, it is characterised in that when the saturation degree between second critical value with being somebody's turn to do
When between the first critical value, first weight is equal to a weight minimum value.
7. image element driving method as claimed in claim 6, it is characterised in that the weight minimum value is equal to 0.
8. image element driving method as claimed in claim 1, it is characterised in that according to the input grey decision-making, set this first
In the step of pixel corresponding first respective value, including：
When first pixel is shown as a main pixel, first respective value is the one of at least one main gamma curve of correspondence
First main respective value；And
When first pixel is shown as an auxiliary pixel, first respective value aids in the one of gamma curve for correspondence at least one
First auxiliary respective value.
9. image element driving method as claimed in claim 1, it is characterised in that the display panel has more multiple second pixels,
Those second pixels are further included adjacent to first pixel, the image element driving method：
Adjusted using a spatial filter according to those first weights corresponding to those second pixels corresponding to first pixel
First weight.
10. image element driving method as claimed in claim 9, it is characterised in that the spatial filter is a smoothing filter.
11. a kind of panel drive circuit, to a display panel electric property coupling, the display panel has one first pixel, its
It is characterised by, the panel drive circuit includes：
One grey decision-making generation circuit, first pixel pair is set to receive an input grey decision-making, and according to the input grey decision-making
One first respective value answered, the input grey decision-making defines a saturation degree；And
One drive circuit, to set one first weight and one second weight according to the saturation degree, and according to one first output ash
Rank value drives first pixel, the first output grey decision-making be equal to first weight and the input grey decision-making product and this
The totalling of two weights and the product of first respective value；
Wherein the summation of first weight and second weight is a fixed value, when the saturation degree is more than first critical value,
The value of first weight increases with the increase of the value of the saturation degree, and the maximum of first weight is less than 0.8.
12. panel drive circuit as claimed in claim 11, it is characterised in that when the saturation degree is equal to a saturation degree maximum
When, the maximum of saturation degree correspondence to first weight.
13. panel drive circuit as claimed in claim 11, it is characterised in that when the saturation degree is less than one second critical value
When, the value of first weight is reduced with the increase of the value of the saturation degree, and second critical value is less than first critical value.
14. panel drive circuit as claimed in claim 13, it is characterised in that when the saturation degree is equal to a saturation degree minimum value
When, first weight is equal to a weight maximum.
15. panel drive circuit as claimed in claim 14, it is characterised in that the weight maximum is equal to the fixed value.
16. panel drive circuit as claimed in claim 13, it is characterised in that when the saturation degree between second critical value with
When between first critical value, first weight is equal to a weight minimum value.
17. panel drive circuit as claimed in claim 16, it is characterised in that the weight minimum value is equal to 0.
18. panel drive circuit as claimed in claim 11, it is characterised in that when first pixel is shown as a main pixel
When, the grey decision-making generation circuit sets one first main correspondence of first respective value as at least one main gamma curve of correspondence
Value；When first pixel is shown as an auxiliary pixel, the grey decision-making generation circuit sets first respective value to correspond at least
One first auxiliary respective value of one auxiliary gamma curve.
19. panel drive circuit as claimed in claim 11, it is characterised in that the display panel further includes multiple second pictures
Element, those second pixels are adjacent to first pixel, and the drive circuit is more to use a spatial filter according to those the second pictures
Those first weights corresponding to element adjust first weight corresponding to first pixel.
20. panel drive circuit as claimed in claim 19, it is characterised in that the spatial filter is a smoothing filter.
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| TW106116254A TWI616859B (en) | 2017-05-17 | 2017-05-17 | Pixel driving method and panel driving circuit |
| TW106116254 | 2017-05-17 |
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| CN107204175B (en) | 2019-10-29 |
| TWI616859B (en) | 2018-03-01 |
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