CN110189717A - A kind of driving method of display module, drive system and display device - Google Patents
A kind of driving method of display module, drive system and display device Download PDFInfo
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- CN110189717A CN110189717A CN201910275212.3A CN201910275212A CN110189717A CN 110189717 A CN110189717 A CN 110189717A CN 201910275212 A CN201910275212 A CN 201910275212A CN 110189717 A CN110189717 A CN 110189717A
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- 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
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- 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
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0242—Compensation of deficiencies in the appearance of colours
Abstract
This application discloses a kind of driving method of display module, drive system and display devices, the driving process of driving process and backlight module including synchronously driven display panel: the driving process of display panel includes: after receiving the first chrominance signal, to be converted into the first tone color saturation brightness space signal；The first chroma signal is adjusted with default regulation coefficient, obtains the second chroma signal；After second chroma signal is converted to the second chrominance signal, display panel is driven；The driving process of backlight module includes: to receive the first chrominance signal, calculates the average signal of the first chroma signal and the average signal of the second chroma signal；It determines minimum colour light source, after obtaining the corresponding minimum light source regulation coefficient of minimum colour light source, adjusts minimum colour light source and obtain the 4th brightness value, drive minimum colour light source with the 4th brightness value；The application maintains color purity to show while improving colour cast.
Description
Technical field
This application involves field of display technology more particularly to a kind of driving methods of display module, drive system and display
Device.
Background technique
It is formed with the development of science and technology with progress, liquid crystal display due to having thin fuselage, power saving and the low hot spot of radiation
For the main product of display, it is widely applied.Liquid crystal display is largely backlight liquid crystal display comprising liquid
Crystal panel and backlight module (Backlight Module).The working principle of liquid crystal display panel is worked as in the parallel glass substrate of two panels
Middle placement liquid crystal molecule, and apply driving voltage on two panels glass substrate to control the direction of rotation of liquid crystal molecule, it will carry on the back
The light refraction of optical mode group, which comes out, generates picture.
In a kind of inventor use and undocumented scheme, it is adjusted by the color saturation to signal, Ke Yigai
Kind colour cast, but so operation can be presented effect to the color saturation of signal and lose.
Summary of the invention
The purpose of the application is to provide driving method, drive system and the display device of a kind of display module, is improving color
While inclined, color purity performance is maintained.
This application discloses a kind of driving method of display module, the driving process including synchronously driven display panel,
And the driving process of backlight module: the backlight module includes at least one backlight subarea, and each backlight subarea includes independent
The first colour light source, the second colour light source and the third colour light source of control；The corresponding light-source brightness of first colour light source
For the first brightness value, the corresponding light-source brightness of second colour light source is the second brightness value, and the third colour light source is corresponding
Light-source brightness be third brightness value；
The driving process of the display panel comprising steps of
Corresponding first chrominance signal of display panel is received, converts the first brightness normalization letter for the first chrominance signal
Number, the first tone color saturation brightness space signal is converted by the first brightness normalized signal；
It is carried out using first chroma signal of the default regulation coefficient to the first tone color saturation brightness space signal
Adjustment, obtains the second chroma signal；
Second chroma signal is converted into the second chrominance signal, drives display panel using the second chrominance signal；
The driving process of the backlight module comprising steps of
Corresponding first chrominance signal of display panel is received, and calculates corresponding first colour saturation of backlight subarea all pixels
Spend signal and the second chroma signal；
Calculate separately the average signal and the second color saturation of corresponding the first all chroma signal in backlight subarea
The average signal of signal；
The minimum colour light source in the first colour light source, the second colour light source and third colour light source is determined, according to first
The average signal of chroma signal and the average signal of the second chroma signal obtain the corresponding minimum of minimum colour light source
Light source regulation coefficient；
Minimum colour light source is adjusted to obtain the 4th brightness value using minimum light source regulation coefficient, uses the 4th brightness
Value drives minimum colour light source.
Improve the scheme of colour cast problem relative to the pixel of display panel is divided into primary and secondary pixel；Illustrative technology
It is to be adjusted to the first color saturation, the second obtained color saturation corresponding conversion is the second chrominance signal, using the second color
Multimedia message number drives display panel, and colour cast problem can be improved well；But due to being carried out to color saturation value
Adjustment, thus cause image quality saturation degree missing；The application is according to the average signal and the second color of the first chroma signal
The average signal of saturation signal obtains minimum light source regulation coefficient to adjust light-source brightness to minimum colour light source, improves
For the tone that color saturation incurs loss, it is aided with the intensity of light source adjusted, so that the color saturation of picture obtains after adjustment
Improve, reduce visual angle colour cast while, improves color purity performance.
Detailed description of the invention
Included attached drawing is used to provide that a further understanding of the embodiments of the present application, and which constitute one of specification
Point, for illustrating presently filed embodiment, and with verbal description come together to illustrate the principle of the application.Under it should be evident that
Attached drawing in the description of face is only some embodiments of the present application, for those of ordinary skill in the art, is not paying wound
Under the premise of the property made is laborious, it is also possible to obtain other drawings based on these drawings.In the accompanying drawings:
Fig. 1 is that the big visual angle of the various representative colour systems of liquid crystal display and front viewing angle colour cast change schematic diagram；
Fig. 2 is that original pixel is divided into the first schematic diagram of primary and secondary pixel in exemplary arrangement；
Fig. 3 is that original pixel is divided into the second schematic diagram of primary and secondary pixel in exemplary arrangement；
Fig. 4 is the structural schematic diagram of the display device of the embodiment of the application；
Fig. 5 is the structural schematic diagram of the drive system of the display module of the embodiment of the application；
Fig. 6 is the structural schematic diagram of the driving circuit of the display panel of the embodiment of the application；
Fig. 7 is the structural schematic diagram of the driving circuit of the backlight module of the embodiment of the application；
Fig. 8 is the flow chart of the driving method of the display module of the embodiment of the application；
Fig. 9 is the flow chart of the driving method of the display module of another embodiment of the application；
Figure 10 is the schematic diagram of the straight-down negative display module of the embodiment of the application；
Figure 11 is a kind of tone expression schematic diagram of the embodiment of the application；
Figure 12 is the chroma signal of the embodiment of the application and the schematic diagram of the second chroma signal variation；
Figure 13 is the chroma signal of another embodiment of the application and the schematic diagram of the second chroma signal variation；
Figure 14 is that the variation of the chroma signal of the embodiment of the application and the color difference of the second chroma signal is shown
It is intended to；
Figure 15 is the chroma signal of another embodiment of the application and the different colours of the second chroma signal
The variation schematic diagram of color difference.
Wherein, 100, the drive system of display module；200, display module；300, display device；110, display panel
Driving circuit；120, the driving circuit of backlight module；111, receiving module；112, module is adjusted；113, drive module；121, light
Source receiving module；122, light source computing module；123, light source adjusting module；124, light source driver module.
Specific embodiment
It is to be appreciated that term used herein above, disclosed specific structure and function details, it is only for description
Specific embodiment is representative, but the application can be implemented by many alternative forms, be not construed as only
It is limited to the embodiments set forth herein.
In the description of the present application, term " first ", " second " are used for description purposes only, and it is opposite to should not be understood as instruction
Importance, or implicitly indicate the quantity of indicated technical characteristic.As a result, unless otherwise indicated, " first ", " are defined
Two " feature can explicitly or implicitly include one or more of the features；The meaning of " plurality " is two or two
More than.Term " includes " and its any deformation, mean and non-exclusive include, it is understood that there may be or addition is one or more that other are special
Sign, integer, step, operation, unit, component and/or combination thereof.
In addition, "center", " transverse direction ", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner",
The term of the orientation or positional relationship of the instructions such as "outside" is that orientation or relative positional relationship based on the figure describe, only
Be that the application simplifies description for ease of description, rather than indicate signified device or element must have a particular orientation,
It is constructed and operated in a specific orientation, therefore should not be understood as the limitation to the application.
Furthermore unless specifically defined or limited otherwise, term " installation ", " connected ", " connection " shall be understood in a broad sense, example
Such as it may be fixed connection or may be dismantle connection, or integral connection；It can be mechanical connection, be also possible to be electrically connected
It connects；It can be directly connected, it can also indirectly connected through an intermediary or the connection inside two elements.For ability
For the those of ordinary skill in domain, the concrete meaning of above-mentioned term in this application can be understood as the case may be.
Large scale liquid crystal display panel mostly uses minus VA (Vertical Alignment, vertically oriented) liquid crystal or IPS
(In-plane Switch, plane conversion) liquid crystal technology, there are higher lifes compared to IPS liquid crystal technology for VA type liquid crystal technology
The advantage of efficiency and low manufacturing cost is produced, but there are more apparent compared to IPS liquid crystal technology for VA type liquid crystal technology in optical property
Optical property defect, especially large size panel needs biggish visual angle to present in terms of business application.
Fig. 1 is that the big visual angle of various representativeness colour systems and front viewing angle colour cast change schematic diagram in liquid crystal display panel；Such as
Shown in Fig. 1, when tone is close to R (red), G (green), B (indigo plant) pure hue, the colour cast deterioration watched there are visual angle is more obvious,
Simultaneously when tone is close to R, G, B pure hue, color offset phenomenon is more obvious, the reason for this is that there are other colors for R, G, B pure hue
Ingredient.
Exemplary solution is that each sub-pixel of RGB is further subdivided into primary and secondary (Main/Sub) pixel, so that whole big
Visual angle brightness is closer to face with voltage change.Fig. 2 is not distinguish primary and secondary pixel and distinguish the first of primary and secondary pixel and compare to show
It is intended to, Fig. 3 is the second contrast schematic diagram that do not distinguish primary and secondary pixel and distinguish primary and secondary pixel, is known referring to figs. 2 and 3, wherein
X coordinate, y-coordinate and z coordinate respectively represent three directions of three-dimensional space；θ A indicates the pre-dumping under the wherein big voltage of main pixel
Lead angle, θ B indicate the pre-dumping lead angle under wherein sub-pixel small voltage.Wherein, the abscissa in the Fig. 3 is grayscale signal, and vertical seat
It is designated as luminance signal, under big visual angle, brightness is rapidly saturated with signal, causes big visual angle colour cast problem (Fig. 3, the camber line in left side
Section), and this problem can be improved to a certain extent by distinguishing primary and secondary pixel.
Liquid crystal display high voltage appearance side view angle voltage corresponding brightness variation ratio is easier to tend to be saturated, so original is believed
Number being divided into big voltage adds small voltage signal to can see such as Fig. 3, face big voltage plus small voltage to maintain original face signal with
Brightness change, the side view brightness that big voltage is seen is with Part A in gray scale variation such as Fig. 3, and the side view brightness that small voltage is seen is with ash
Rank variation such as Part B in Fig. 3, the brightness that such side view synthesis seems is with gray scale variation just more close to positive brightness with ash
The relationship of rank variation, so visual angle brightness faces original signal brightness with signal intensity with signal intensity relationship is close so that visual angle
Improved.
It is this by spatially primary and secondary pixel to give different driving voltages to solve visual angle colour cast and obtain defect, such picture
Element design generally requires redesign metal routing or TFT (Thin Film Transistor, thin film transistor (TFT)) element to drive
Sub-pixel causes light-permeable open region sacrifice, influences panel penetrance, directly contributes the promotion of backlight cost.
Below with reference to the accompanying drawings it elaborates with optional embodiment to the application.
As shown in figure 4, this application discloses a kind of display device 300, the drive system 100 including following display modules
With display module 200；Wherein, display module 200 includes display panel and backlight module.
As shown in Figures 5 to 7, disclosed herein as well is a kind of drive systems 100 of display module, are shown using following
Show the driving method of mould group, comprising: the driving circuit 110 of synchronously driven display panel and the driving circuit of backlight module
120: the backlight module includes at least one backlight subarea, each backlight subarea include independent control the first colour light source,
Second colour light source and third colour light source；The corresponding light-source brightness of first colour light source is the first brightness value, described the
The corresponding light-source brightness of second colors light source is the second brightness value, and the corresponding light-source brightness of the third colour light source is third brightness
Value；
The driving circuit 110 of the display panel includes: receiving module 111, adjustment module 112 and drive module 113；
The receiving module 111 receives corresponding first chrominance signal of display panel, converts the first brightness for the first chrominance signal and returns
One changes signal, converts the first tone color saturation brightness space signal for the first brightness normalized signal；The adjustment module
112 are adjusted the first chroma signal of the first tone color saturation brightness space signal using default regulation coefficient,
Obtain the second chroma signal of color bias improvement and the second brightness normalized signal of corresponding second chroma signal；Institute
It states drive module 113 and second brightness normalized signal is converted into the second chrominance signal, driven and shown using the second chrominance signal
Panel；
The driving circuit 120 of the backlight module includes: light source receiving module 121, light source computing module 122, light source tune
Mould preparation block 123 and light source driver module 124；The light source receiving module 121 receives corresponding first chrominance signal of display panel,
And calculate corresponding first chroma signal of backlight subarea all pixels and the second chroma signal；The light source calculates mould
Block 122 calculates separately the average signal and the second chroma signal of corresponding the first all chroma signal in backlight subarea
Average signal；The light source adjusting module 123 determines in the first colour light source, the second colour light source and third colour light source
Minimum colour light source obtains most according to the average signal of the first chroma signal and the average signal of the second chroma signal
The corresponding minimum light source regulation coefficient of small colour light source；The light source driver module 124 is using minimum light source regulation coefficient to most
Small colour light source is adjusted to obtain the 4th brightness value, is driven using the 4th brightness value to minimum colour light source.
The light source adjusting module includes first light source adjustment module and second light source adjustment module, the first light source tune
Mould preparation block determines above-mentioned minimum light source and obtains minimum light source regulation coefficient；The second light source adjustment module determines the first color
Minimum colour light source in light source, the second colour light source and third colour light source, according to the first brightness normalized signal and second
Brightness normalized signal obtains the corresponding time big light source regulation coefficient of time big colour light source；The light source driver module includes first
Light source driver module and second light source drive module, the first light source drive module is using minimum light source regulation coefficient to minimum
Colour light source is adjusted to obtain the 4th brightness value, is driven using the 4th brightness value to minimum colour light source；Described second
Light source driver module is adjusted to obtain the 5th brightness value using secondary big light source regulation coefficient to secondary big colour light source, uses the 5th
Brightness value drives secondary big colour light source.
Corresponding, as shown in Figure 8 and Figure 9, disclosed herein as well is a kind of driving methods of display module, including synchronous drive
The driving process of dynamic display panel and the driving process of backlight module:
The backlight module includes at least one backlight subarea, and each backlight subarea includes the first color of light of independent control
Source, the second colour light source and third colour light source；The corresponding light-source brightness of first colour light source is the first brightness value, described
The corresponding light-source brightness of second colour light source is the second brightness value, and the corresponding light-source brightness of the third colour light source is that third is bright
Angle value；
The driving process of the display panel comprising steps of
S11: receiving corresponding first chrominance signal of display panel, converts the first brightness normalization for the first chrominance signal
The first brightness normalized signal is converted first brightness of tone color saturation (HSV) spacing wave by signal；
S12: using default regulation coefficient to the first chroma signal of the first tone color saturation brightness space signal
It is adjusted, obtains the second chroma signal of color bias improvement and the second brightness normalizing of corresponding second chroma signal
Change signal；
S13: being converted to the second chrominance signal for the second chroma signal, drives display surface using the second chrominance signal
Plate；
The driving process of the backlight module comprising steps of
S21: corresponding first chrominance signal of display panel is received, and calculates corresponding first color of backlight subarea all pixels
Saturation signal and the second chroma signal；
S22: average signal and the second color for calculating separately corresponding the first all chroma signal in backlight subarea are full
With the average signal of degree signal；
S23: determining the minimum colour light source in the first colour light source, the second colour light source and third colour light source, according to
It is corresponding that the average signal of first chroma signal and the average signal of the second chroma signal obtain minimum colour light source
Minimum light source regulation coefficient；
S24: minimum colour light source is adjusted to obtain the 4th brightness value using minimum light source regulation coefficient, uses the 4th
Brightness value drives minimum colour light source.
Improve the scheme of colour cast problem relative to the pixel of display panel is divided into primary and secondary pixel；Illustrative technology
It is to be adjusted to the first color saturation, the second obtained color saturation corresponding conversion is the second chrominance signal, using the second color
Multimedia message number drives display panel, and colour cast problem can be improved well；But due to being carried out to color saturation value
Adjustment, thus cause image quality saturation degree missing；The application is according to the average signal and the second color of the first chroma signal
The average signal of saturation signal obtains minimum light source regulation coefficient to adjust light-source brightness to minimum colour light source, wherein
The adjustment of the intensity of light source improves the tone to incur loss for color saturation as unit of a backlight subarea, is aided with adjustment
The intensity of light source afterwards while reducing visual angle colour cast, maintains so that color saturation adjusted returns to primary colors saturation degree
Color purity performance, wherein chrominance signal can be red green blue tricolor signal, specifically, the first chrominance signal can be the
One red green blue tricolor signal, the second chrominance signal can be the second red green blue tricolor signal.
It is described to be obtained most according to the average signal of the first chroma signal and the average signal of the second chroma signal
The step of small colour light source corresponding minimum light source regulation coefficient includes: that the minimum light source regulation coefficient y meets following formula:
Y=(Sn_ave-1)/(S ' n_ave-1), wherein Sn_ave is the average signal of the first chroma signal, and S ' n_ave is the
The average signal of two chroma signals.According to the average signal of the first chroma signal and the second color saturation in this formula
The average signal of signal calculates the average signal and of the first chroma signal adjusted as unit of backlight subarea
The difference degree of the average signal of two chroma signals then calculates the number of minimum light source regulation coefficient based on this
Value, the minimum light source regulation coefficient obtained according to such calculate is integrally-regulated to the progress of minimum colour light source, then can pass through
The intensity of light source of minimum colour light source is controlled, so that the intensity of light source adjusted the second colour saturation corresponding with minimum colour light source
It spends signal to combine, the color displays situation shown for showing the first chroma signal changes while improving colour cast
The kind gorgeous degree for even maintaining color.
The first brightness normalized signal is returned including the first red luma normalized signal rn_i, j, the first Green brightness
One changes signal gn_i, j and the first blue luminences normalized signal bn_i, j；The second brightness normalized signal includes second
Red luma normalized signal r ' n_i, j, the second Green brightness normalized signal g ' n_i, j and the normalization of the second blue luminences
Signal b ' n_i, j；
It is described to use default regulation coefficient to the first chroma signal of the first tone color saturation brightness space signal
It is adjusted, obtains the step of the second brightness normalized signal of the second chroma signal and corresponding second chroma signal
It suddenly include: that the first chroma signal Sn_i, j is adjusted to the second chroma signal S ' n_i, j:S ' according to the following formula
N_i, j=a × S4n_i,j+b×S3n_i,j+c×S2n_i,j+d×Sn_i,j+e；Wherein, a, b, c, d, e are default adjustment
Coefficient, and be constant；According to the first chroma signal Sn_i, j and the second chroma signal S ' n_i, j, to the first brightness
Minimum value in normalized signal is adjusted, and obtains the second brightness normalized signal, specific formula is as follows:
According to Sn_i, j=1-minn_i, j/maxn_i, j, maxn_i is kept, j is constant, only turns down minn_i, j, then obtains
It obtains in the second chroma signal Sn_i, j '=1-min ' n_i, j/maxn_i, j and the second brightness normalized signal most
Small value min ' n_i, j；
Wherein, maxn_i, j=Max (rn_i, j, gn_i, j, bn_i, j)=Max (r ' n_i, j, g ' n_i, j, b ' n_i,
j)；Mid_i, j=Mid (rn_i, j, gn_i, j, bn_i, j)；Minn_i, j=Min (rn_i, j, gn_i, j, bn_i, j)；
Mid ' n_i, j=Mid (r ' n_i, j, g ' n_i, j, b ' n_i, j)；Min ' n_i, j=Min (r ' n_i, j, g ' n_i, j, b ' n_
i,j)；The average signal and the second color saturation for calculating separately corresponding the first all chroma signal in backlight subarea
The step of average signal of signal includes: the average value for calculating all first saturation signals in backlight subarea: Sn_ave=
Average(Sn_1,1, Sn_1,2,…,Sn_i,j)；Calculate the average value of all second saturation signals in backlight subarea: S '
N_ave=Average (S ' n_1,1, S ' n_1,2 ..., S ' n_i, j).
By turning down minimum value minn_i, j in each first brightness normalized signal, the second brightness normalization letter is obtained
Number, the ingredient of other colors other than dominant hue is reduced, i.e. reduction colour mixture, thus the case where effectively improving colour cast；It reduces
Minimum value minn_i, j improve color saturation, i.e., remove other colors in colour mixture, only retain dominant hue, and big visual angle is allowed to leak
Just close the problem of just seeing self-tone, equally facing side view colour cast, just can solve light color, that is, positive side view light leakage color is
One kind of three primary colors；
In addition, the first chroma signal be converted to the default regulation coefficient in the formula of the second chroma signal can also
With according to being actually changed；For example, when required by minn_i, j is turned up, so that saturation degree reduction is also possible, this
When colour mixture can be made close to white muted color, the colour cast of muted color can reach colour cast decline be primarily due to allow RGB three primary colors all
Light leakage, such three primary colors light leakage color mixing would not generate color, that is, positive side view light leakage color is muted color.
After being adjusted using minimum light source regulation coefficient to minimum colour light source, all pictures in the backlight subarea are obtained
Simultaneously third color saturation average value is calculated in the corresponding third chroma signal of element；It is described according to the first chroma signal
Average signal and the average signal of the second chroma signal obtain the corresponding minimum light source regulation coefficient of minimum colour light source
The step of include: to obtain minimum light source regulation coefficient y so that the average signal of corresponding second chroma signal in backlight subarea
The third color saturation average value S " n_ave that S ' n_ave is obtained after to the adjustment of minimum colour light source meets following formula: S "
N_ave=Sn_ave；According to following three formula: S " n_ave=1-min ' * y/maxn_ave；S ' n_ave=1-min '/
maxn_ave；Sn_ave=1-minn_ave/maxn_ave；It is calculated: y=(Sn_ave-1)/(S ' n_ave-1)；
Wherein, minn_ave is the average value, first green of the actual first red luma normalized signal of backlight subarea
The average value of colour brightness normalized signal and with the first minimum average B configuration value in the average value of the first blue luminences normalized signal；
Maxn_ave be the average value of the second red luma normalized signal of backlight subarea, the second Green brightness normalized signal it is flat
Mean value and with the first maximum average value in the average value of the second blue luminences normalized signal；Min ' is by assuming that maxn_
Minimum signal in the average value for the second brightness normalized signal that ave is constant and is calculated.
Believe after being adjusted to obtain the second chroma signal to the first chroma signal, then to the second color saturation
Number corresponding minimum intensity of light source is adjusted, and obtains the color representation that display situation is third chroma signal, corresponding
Minimum light source regulation coefficient is y, and the average signal of third chroma signal adjusted and the first chroma signal
Average signal is equal, so that the color representation of the degree of the color representation of third chroma signal and the first chroma signal
Degree is consistent, on the basis of improving colour cast, maintains color representation.
Minimum colour light source in first colour light source of determination, the second colour light source and third colour light source, according to
It is corresponding that the average signal of first chroma signal and the average signal of the second chroma signal obtain minimum colour light source
The step of minimum light source regulation coefficient further include: determine in the first colour light source, the second colour light source and third colour light source
Secondary big colour light source；Time big light source regulation coefficient is obtained according to the first brightness normalized signal and the second brightness normalized signal；
It is described that minimum colour light source is adjusted to obtain the 4th brightness value using minimum light source regulation coefficient, use the 4th brightness value pair
The step of minimum colour light source is driven further include: secondary big colour light source is adjusted using secondary big light source regulation coefficient
To the 5th brightness value, secondary big colour light source is driven using the 5th brightness value.
The first brightness normalized signal includes the first red luma normalized signal, the first Green brightness normalization letter
Number and the first blue luminences normalized signal；The second brightness normalized signal include the second red luma normalized signal,
Second Green brightness normalized signal and the second blue luminences normalized signal；In each backlight subarea, it is red to calculate first
The average value of brightness normalized signal, the average value of the first Green brightness normalized signal and the first blue luminences normalized signal
Average value in the first maximum average value, big average value and the first minimum average B configuration value for the first time；The second red luma is calculated to return
One changes average value, the average value of the second Green brightness normalized signal and being averaged for the second blue luminences normalized signal of signal
The second maximum average value, second big average value and the second minimum average B configuration value in value；Described normalized according to the first brightness is believed
Number and the second brightness normalized signal the step of obtaining time big light source regulation coefficient include:
If secondary big light source regulation coefficient is x, meet following formula: midn_ave=x*mid ' n_ave；Wherein, midn_
Ave is that big average value, mid ' n_ave are second of big average value for the first time.
By adjusting the corresponding intensity of light source of secondary big signal, so, it is possible to reduce be adjusted to from the first chroma signal
When the second chroma signal, the ingredient comparative situation of colour mixture, to reduce inclined in color saturation set-up procedure bring tone
From problem, so that it is empty that the tone of picture can approach or even be restored to the first tone color saturation brightness after light source adjustment
Between signal when tone the case where, i.e. H " n_ave=Hn_ave, wherein Hn_ave be the first color space signal in tone
Average value, H " n_ave be by secondary big light source regulation coefficient x, after being adjusted to secondary big light source, the tone that is shown
Average value, i.e. accuracy before and after maintenance integral color.
In addition, it is described according to Sn_i, j=1-minn_i, j/maxn_i, j, maxn_i is kept, j is constant, only turns down
Minn_i, j then obtain the second chroma signal S ' n_i, j=1-min ' n_i, j/maxn_i, j and the second brightness normalizing
Change signal in minimum value min ' n_i, j the step of further include；
The second brightness normalized signal is calculated according to midn_i, j-minn_i, j=mid ' n_i, j-min ' n_i, j
In second largest value mid-min=mid '-min '.
Such as: when normalized brightness signal r, g, b calculate tone satisfaction 0 < Hn_i, j < 30, then secondary luminance signal subtracts most
Small luminance signal maintains, gn_i, j-bn_i, j=g ' n_i, the constant brightness difference of j-b ' n_i, j, in addition former normalized brightness
Signal conversion saturation signal Sn_i, j=1-bn_i, j/rn_i, j, become S ' n_i, j by Sn_i, j, saturation degree S ' after conversion
N_i, j=1-b ' n_i, j/rn_i, j can calculate minimum signal b ' n_i, j in the second brightness normalized signal therefore can push away
Calculate time big signal g ' n_i, j in the second brightness normalized signal.This programme maintains the secondary luminance signal and most of adjustment front and back
Luminance difference between small luminance signal is adjusted secondary big colour light source using time big light source regulation coefficient with above-mentioned, wherein
The scheme that secondary big light source regulation coefficient x meets midn_ave=x*mid ' n_ave combines；, further improve in colour saturation
Adjusting stage bring tone skew problem is spent, the function of correction is played to tone.
The first maximum average value maxn_ave, for the first time big average value midn_ave, the first minimum average B configuration value minn_
Ave, the average value rn_ave of the first red luma normalized signal, the first Green brightness normalized signal average value gn_ave
Meet following formula with the relationship of the average value bn_ave of the first blue luminences normalized signal:
Maxn_ave=Max (rn_ave, gn_ave, bn_ave)；
Midn_ave=Mid (rn_ave, gn_ave, bn_ave)；
Minn_ave=Min (rn_ave, gn_ave, bn_ave)；
The second maximum average value max ' n_ave, for the first time big average value mid ' n_ave, the first minimum average B configuration value
Min ' n_ave, the average value r ' n_ave of the first red luma normalized signal, the first Green brightness normalized signal are averaged
The relationship of the average value b ' n_ave of value g ' n_ave and the first blue luminences normalized signal meets following formula:
Max ' n_ave=Max (r ' n_ave, g ' n_ave, b ' n_ave)；
Mid ' n_ave=Mid (r ' n_ave, g ' n_ave, b ' n_ave)；
Min ' n_ave=Min (r ' n_ave, g ' n_ave, b ' n_ave).
The corresponding first red luma normalized signal in backlight subarea be respectively as follows: rn_1,1, rn_1,2 ..., rn_i, j,
The corresponding first Green brightness normalized signal in backlight subarea be respectively as follows: gn_1,1, gn_1,2 ..., gn_i, j, backlight subarea pair
The the first blue luminences normalized signal answered be respectively as follows: bn_1,1, bn_1,2 ..., bn_i, j；First red luma normalization letter
Number average value rn_ave, the first Green brightness normalized signal average value gn_ave and the first blue luminences normalization letter
Number the relationship of average value bn_ave meet following formula:
Rn_ave=Average (rn_1,1, rn_1,2 ..., rn_i, j)；
Gn_ave=Average (gn_1,1, gn_1,2 ..., gn_i, j)；
Bn_ave=Average (bn_1,1, bn_1,2 ..., bn_i, j)；
The corresponding second red luma normalized signal in backlight subarea be respectively as follows: r ' n_1,1, r ' n_1,2 ..., r ' n_i,
J, the corresponding second Green brightness normalized signal in backlight subarea be respectively as follows: g ' n_1,1, g ' n_1,2 ..., g ' n_i, j, backlight
The corresponding second blue luminences normalized signal of subregion be respectively as follows: b ' n_1,1, b ' n_1,2 ..., b ' n_i, j；Second is red bright
It is bright to spend the average value r ' n_ave of normalized signal, the blue of the average value g ' n_ave of the second Green brightness normalized signal and second
The relationship for spending the average value b ' n_ave of normalized signal meets following formula:
R ' n_ave=Average (r ' n_1,1, r ' n_1,2 ..., r ' n_i, j)；
G ' n_ave=Average (g ' n_1,1, g ' n_1,2 ..., g ' n_i, j)；
B ' n_ave=Average (b ' n_1,1, b ' n_1,2 ..., b ' n_i, j).
The application is by accurately calculating, and it is bright to obtain the average value of the first red luma normalized signal, the first green
Spend the average value of normalized signal, the average value of the first blue luminences normalized signal, the second red luma normalized signal
The average value of average value, the average value of the second Green brightness normalized signal and the second blue luminences normalized signal, is accurate to
The change situation of brightness normalized signal corresponding to each pixel, adjustment also more acurrate according to the result accurately calculated
Effect is more preferable.
Figure 10 is the schematic diagram of straight-down negative display module；As shown in Figure 10, display panel is divided into multiple backlight subareas, often
A backlight subarea is correspondingly arranged the first colour light source, the second colour light source and third colour light source of independent control, the first color
The pixel of light source, the second colour light source and third colour light source and viewing area is correspondingly arranged.
During the driving of display panel, corresponding first chrominance signal of the reception display panel, by the first color
Signal is converted into the first brightness normalized signal, and it is empty to convert the first tone color saturation brightness for the first brightness normalized signal
Between signal the step of include: the input signal of the first chrominance signal be 0,1 ... 255 8bit grayscale digital signal, each grayscale letter
Number correspond to 255 input the first brightness normalized signal (using 255 grayscale as maximum brightness) be respectively r, g, b；Wherein,
R=(R/255) ^ γ r, g=(G/255) ^ γ g, b=(B/255) ^ γ b；γ r, γ g, γ b are gamma signal；
As shown in figure 11, H is color representative, represents different form and aspect colors by 0 °~360 ° and presents, wherein it is red for defining 0 °
Color, 120 ° are green, and 240 ° are blue；
The formula that brightness normalized signal r, g, b are converted into tone h and chroma signal s is as follows:
Wherein, max indicates the maximum value in r/g/b, and min indicates the minimum value in r/g/b.
Figure 12 is the schematic diagram that chroma signal and the second chroma signal change, as shown in figure 12, the use
Default regulation coefficient is adjusted, obtains to the first chroma signal Sn_i of the first tone color saturation brightness space signal, j
It include: the second chroma signal S ' n_i, j by the first colour saturation to the step of the second chroma signal S ' n_i, j
Signal Sn_i is spent, j is obtained by following formula:
S ' n_i, j=a × S4n_i,j+b×S3n_i,j+c×S2N_i, j+d × Sn_i, j+e,
Wherein, a, b, c, d, e are default regulation coefficient, are constant；A, b, c, d, e can be adjusted according to actual needs
It is whole.
Described the step of second chroma signal is converted to the second chrominance signal includes: by the second chroma signal
It is converted to the second tone color saturation brightness space signal, brightness is turned down according to the second tone color saturation brightness space signal
Minimum value in normalized signal, to obtain the second brightness normalized signal；
The second chrominance signal is converted to according to the second brightness normalized signal.
In one embodiment, the application can also divide tone H for m tone section；Figure 13 is that the color of the present embodiment is full
Default adjustment system is obtained according to tone section as shown in figure 13 with the schematic diagram of degree signal and the variation of the second chroma signal
Number a (H (m)), b (H (m)), c (H (m)), d (H (m)), e (H (m))；Wherein, the more serious regulation coefficient of colour cast is bigger；
The corresponding second chroma signal S ' (H (m), S) of the chroma signal s and tone section meets as follows
Formula:
S'(H (m), S)=a (H (m)) × S4+b(H(m))×S 3+c(H(m))×S 2+d(H(m))×S+e(H(m))
Wherein, a (H (m)), b (H (m)), c (H (m)), d (H (m)), e (H (m)) are that tone section adjusts often saturation degree
Number.
Tone (H) is divided into multiple sections, different sections, colour cast degree is different, full to color according to different sections
Different adjustment is used with degree, so that the adjustment of colour cast is more uniform while the colour vividness of display panel is promoted.
Described the step of second chroma signal is converted to the second chrominance signal includes: the second chroma signal S '
N_i, j are converted to the second brightness normalized signal, and the second brightness normalized signal r ', g ', b ' is converted by following formula
Obtain the second chrominance signal R ', G ', B ':
R '=255 × (r ')1/γr, G '=255 × (g ')1/γg, B '=255 × (b ')1/γb。
While using the second chrominance signal driving display panel, minimum colour light source is driven using the 4th brightness value,
Time big colour light source is driven using the 5th brightness value.
Figure 14 is the variation schematic diagram of the color difference of chroma signal and the second chroma signal；Figure 15 is color saturation
The variation schematic diagram of the color difference of signal and the different colours of the second chroma signal；In summary, the ingredient of colour mixture has been turned down,
And the excitation purity of dominant hue is increased to improve the excitation purity of signal, be conducive to improve colour cast, specifically, being with red
Example, when the close red solid color shade of tone, the colour cast deterioration watched there are visual angle is more obvious, can be red pure through reduction
The brightness normalized signal of the smallest color of brightness normalized signal in color tone is realized and promotes dominant hue in red solid color shade
Color saturation purpose, reduce using red as the colour mixture of other colors (green and blue) in the tone of dominant hue, allow big
Visual angle light leakage color is faced and is addressed with the problem of side view colour cast close to self-tone is just seen.
It should be noted that the restriction for each step being related in this programme, in the premise for not influencing concrete scheme implementation
Under, it does not regard as being can be the step of making restriction to step sequencing, write on front what is first carried out, be also possible to
It executes, is possibly even performed simultaneously afterwards, as long as this programme can be implemented, all shall be regarded as belonging to the protection model of the application
It encloses.
The technical solution of the application can be widely applied to various display panels, as TN (Twisted Nematic, distort to
Column type) display panel, IPS (In-Plane Switching, plane conversion type) display panel, VA (Vertical
Alignment, vertical orientation type) display panel, (Multi-Domain Vertical Alignment, more quadrants are vertical by MVA
Alignment-type) display panel, it is of course also possible to be other kinds of display panel, such as OLED (Organic Light-
Emitting Diode, Organic Light Emitting Diode) display panel, applicable above scheme.
The above content is combine specific optional embodiment to made by the application further description, and it cannot be said that
The specific implementation of the application is only limited to these instructions.For those of ordinary skill in the art to which this application belongs, exist
Under the premise of not departing from the application design, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to the application's
Protection scope.
Claims (10)
1. a kind of driving method of display module, which is characterized in that the driving process including synchronously driven display panel, and
The driving process of backlight module:
The backlight module includes at least one backlight subarea, each backlight subarea include independent control the first colour light source,
Second colour light source and third colour light source；The corresponding light-source brightness of first colour light source is the first brightness value, described the
The corresponding light-source brightness of second colors light source is the second brightness value, and the corresponding light-source brightness of the third colour light source is third brightness
Value；
The driving process of the display panel comprising steps of
Corresponding first chrominance signal of display panel is received, converts the first brightness normalized signal for the first chrominance signal, it will
First brightness normalized signal is converted into the first tone color saturation brightness space signal；
It is adjusted using first chroma signal of the default regulation coefficient to the first tone color saturation brightness space signal,
Obtain the second chroma signal of color bias improvement and the second brightness normalized signal of corresponding second chroma signal；
Second brightness normalized signal is converted into the second chrominance signal, drives display panel using the second chrominance signal；
The driving process of the backlight module comprising steps of
Corresponding first chrominance signal of display panel is received, and calculates the corresponding first color saturation letter of backlight subarea all pixels
Number and the second chroma signal；
Calculate separately the average signal and the second chroma signal of corresponding the first all chroma signal in backlight subarea
Average signal；
Determine the minimum colour light source in the first colour light source, the second colour light source and third colour light source, it is full according to the first color
Minimum light source corresponding with the minimum colour light source of the average signal acquisition of the average signal of degree signal and the second chroma signal
Regulation coefficient；
Minimum colour light source is adjusted to obtain the 4th brightness value using minimum light source regulation coefficient, uses the 4th brightness value pair
Minimum colour light source is driven.
2. a kind of driving method of display module as described in claim 1, which is characterized in that described according to the first color saturation
The average signal of signal and the average signal of the second chroma signal obtain the corresponding minimum light source adjustment of minimum colour light source
The step of coefficient includes:
The minimum light source regulation coefficient y meets following formula:
Y=(Sn_ave-1)/(S ' n_ave-1), wherein Sn_ave is the average signal of the first chroma signal, S ' n_ave
For the average signal of the second chroma signal.
3. a kind of driving method of display module as claimed in claim 2, which is characterized in that the first brightness normalization letter
Number include the first red luma normalized signal rn_i, j, the first Green brightness normalized signal gn_i, j and the first blue luminences
Normalized signal bn_i, j；
The second brightness normalized signal includes the second red luma normalized signal r ' n_i, j, the second Green brightness normalizing
Change signal g ' n_i, j and the second blue luminences normalized signal b ' n_i, j；
It is described to be carried out using first chroma signal of the default regulation coefficient to the first tone color saturation brightness space signal
The step of adjusting, obtaining the second chroma signal and correspond to the second brightness normalized signal of the second chroma signal packet
It includes:
The first chroma signal Sn_i, j is adjusted to the second chroma signal S ' n_i, j according to the following formula:
S ' n_i, j=a × S4n_i,j+b×S3n_i,j+c×S2n_i,j+d×Sn_i,j+e；
Wherein, a, b, c, d, e are default regulation coefficient, and are constant；
According to the first chroma signal Sn_i, j and the second chroma signal S ' n_i, j, to the first brightness normalized signal
In minimum value be adjusted, obtain the second brightness normalized signal, specific formula is as follows:
According to Sn_i, j=1-minn_i, j/maxn_i, j, maxn_i is kept, j is constant, only turns down minn_i, j, then obtains the
Minimum value in two chroma signal Sn_i, j '=1-min ' n_i, j/maxn_i, j and the second brightness normalized signal
min'n_i,j；
Wherein, maxn_i, j=Max (rn_i, j, gn_i, j, bn_i, j)=Max (r ' n_i, j, g ' n_i, j, b ' n_i, j)；
Mid_i, j=Mid (rn_i, j, gn_i, j, bn_i, j)；Minn_i, j=Min (rn_i, j, gn_i, j, bn_i, j)；mid'n_
I, j=Mid (r ' n_i, j, g ' n_i, j, b ' n_i, j)；Min ' n_i, j=Min (r ' n_i, j, g ' n_i, j, b ' n_i, j)；
The average signal and the second color saturation for calculating separately corresponding the first all chroma signal in backlight subarea
The step of average signal of signal includes:
Calculate the average value of all first saturation signals in backlight subarea:
Sn_ave=Average (Sn_1,1, Sn_1,2 ... .., Sn_i, j)；
Calculate the average value of all second saturation signals in backlight subarea:
S ' n_ave=Average (S ' n_1,1, S ' n_1,2 ... .., S ' n_i, j).
4. a kind of driving method of display module as claimed in claim 2, which is characterized in that use minimum light source regulation coefficient
After being adjusted to minimum colour light source, obtains the corresponding third chroma signal of the backlight subarea all pixels and count
Calculation obtains the average signal of third chroma signal；
It is described that minimum face is obtained according to the average signal of the first chroma signal and the average signal of the second chroma signal
The step of color light source corresponding minimum light source regulation coefficient includes:
Assuming that the average signal S ' n_ave of the second chroma signal and average signal S " n_ave of third chroma signal
Maximum value in the average value of corresponding brightness normalized signal, the average signal Sn_ave with the first chroma signal are corresponding
The first maximum average value maxn_ave it is identical；
Minimum light source regulation coefficient y is obtained, so that the average signal S ' n_ave of corresponding second chroma signal in backlight subarea
The third color saturation average value S " n_ave obtained after to the adjustment of minimum colour light source meets following formula: S " n_ave=
Sn_ave, then；
According to following three formula:
S ' n_ave=1-min '/maxn_ave；
S " n_ave=1-min ' * y/maxn_ave；
Sn_ave=1-minn_ave/maxn_ave；
It is calculated:
Y=(Sn_ave-1)/(S ' n_ave-1)；
Wherein, minn_ave is average value, the first Green brightness normalizing of the first red luma normalized signal of backlight subarea
Change signal average value and with the first minimum average B configuration value in the average value of the first blue luminences normalized signal；Maxn_ave is
The average value of second red luma normalized signal of backlight subarea, the average value of the second Green brightness normalized signal and with
The first maximum average value in the average value of two blue luminences normalized signals；Min ' is that the second brightness normalized signal is corresponding
Minimum signal.
5. a kind of driving method of display module as described in Claims 1-4 any one, which is characterized in that the determination
Minimum colour light source in first colour light source, the second colour light source and third colour light source, according to the first chroma signal
Average signal and the average signal of the second chroma signal obtain the corresponding minimum light source regulation coefficient of minimum colour light source
The step of further include:
Determine time big colour light source in the first colour light source, the second colour light source and third colour light source；According to the first brightness
Normalized signal and the second brightness normalized signal obtain time big light source regulation coefficient；
It is described that minimum colour light source is adjusted to obtain the 4th brightness value using minimum light source regulation coefficient, use the 4th brightness
The step of value drives minimum colour light source further include:
Secondary big colour light source is adjusted to obtain the 5th brightness value using secondary big light source regulation coefficient, uses the 5th brightness value pair
Secondary big colour light source is driven.
6. a kind of driving method of display module as claimed in claim 5, which is characterized in that the first brightness normalization letter
Number include the first red luma normalized signal, the first Green brightness normalized signal and the first blue luminences normalized signal；
The second brightness normalized signal include the second red luma normalized signal, the second Green brightness normalized signal and
Second blue luminences normalized signal；
In each backlight subarea, the average value of the first red luma normalized signal, the first Green brightness normalization letter are calculated
Number average value and the first blue luminences normalized signal average value in the first maximum average value, for the first time big average value and
First minimum average B configuration value；Calculate the average value of the second red luma normalized signal, the second Green brightness normalized signal it is flat
The second maximum average value, second big average value and second in the average value of mean value and the second blue luminences normalized signal are most
Small average value；
Described the step of secondary big light source regulation coefficient is obtained according to the first brightness normalized signal and the second brightness normalized signal
Include:
If secondary big light source regulation coefficient is x, meet following formula: midn_ave=x*mid ' n_ave；Wherein, midn_ave is
Big average value for the first time, mid ' n_ave are second of big average value.
7. a kind of driving method of display module as claimed in claim 5, which is characterized in that
The first maximum average value maxn_ave, for the first time big average value midn_ave, the first minimum average B configuration value minn_ave,
The average value rn_ave of first red luma normalized signal, the average value gn_ave of the first Green brightness normalized signal and
The relationship of the average value bn_ave of one blue luminences normalized signal meets following formula:
Maxn_ave=Max (rn_ave, gn_ave, bn_ave)；
Midn_ave=Mid (rn_ave, gn_ave, bn_ave)；
Minn_ave=Min (rn_ave, gn_ave, bn_ave)；
The second maximum average value max ' n_ave, for the first time big average value mid ' n_ave, the first minimum average B configuration value min ' n_
Ave, the average value r ' n_ave of the first red luma normalized signal, the first Green brightness normalized signal average value g ' n_
The relationship of the average value b ' n_ave of ave and the first blue luminences normalized signal meets following formula:
Max ' n_ave=Max (r ' n_ave, g ' n_ave, b ' n_ave)；
Mid ' n_ave=Mid (r ' n_ave, g ' n_ave, b ' n_ave)；
Min ' n_ave=Min (r ' n_ave, g ' n_ave, b ' n_ave).
8. a kind of driving method of display module as claimed in claim 7, which is characterized in that backlight subarea is corresponding first red
Colour brightness normalized signal be respectively as follows: rn_1,1, rn_1,2 ..., rn_i, j, the corresponding first Green brightness normalizing in backlight subarea
Change signal be respectively as follows: gn_1,1, gn_1,2 ..., gn_i, the corresponding first blue luminences normalized signal difference in j, backlight subarea
Are as follows: bn_1,1, bn_1,2 ..., bn_i, j；Average value rn_ave, the first Green brightness of first red luma normalized signal
The relationship of the average value bn_ave of the average value gn_ave of normalized signal and the first blue luminences normalized signal meets as follows
Formula:
Rn_ave=Average (rn_1,1, rn_1,2 ..., rn_i, j)；
Gn_ave=Average (gn_1,1, gn_1,2 ..., gn_i, j)；
Bn_ave=Average (bn_1,1, bn_1,2 ..., bn_i, j)；
The corresponding second red luma normalized signal in backlight subarea be respectively as follows: r ' n_1,1, r ' n_1,2 ..., r ' n_i, j, back
The corresponding second Green brightness normalized signal of light subregion be respectively as follows: g ' n_1,1, g ' n_1,2 ..., g ' n_i, j, backlight subarea
Corresponding second blue luminences normalized signal be respectively as follows: b ' n_1,1, b ' n_1,2 ..., b ' n_i, j；Second red luma is returned
The average value r ' n_ave of one change signal, the average value g ' n_ave of the second Green brightness normalized signal and the second blue luminences are returned
The relationship of the average value b ' n_ave of one change signal meets following formula:
R ' n_ave=Average (r ' n_1,1, r ' n_1,2 ..., r ' n_i, j)；
G ' n_ave=Average (g ' n_1,1, g ' n_1,2 ..., g ' n_i, j)；
B ' n_ave=Average (b ' n_1,1, b ' n_1,2 ..., b ' n_i, j).
9. a kind of drive system of display module uses a kind of drive of display module as described in claim 1 to 8 any one
Dynamic method characterized by comprising the driving circuit of synchronously driven display panel and the driving circuit of backlight module:
The backlight module includes multiple backlight subareas, and each backlight subarea includes the first colour light source of independent control, second
Colour light source and third colour light source；The corresponding light-source brightness of first colour light source is the first brightness value, second face
The corresponding light-source brightness of color light source is the second brightness value, and the corresponding light-source brightness of the third colour light source is third brightness value；
The driving circuit of the display panel includes:
Receiving module receives corresponding first chrominance signal of display panel, converts the first brightness normalizing for the first chrominance signal
Change signal, converts the first tone color saturation brightness space signal for the first brightness normalized signal；
Module is adjusted, using default regulation coefficient to the first chroma signal of the first tone color saturation brightness space signal
It is adjusted, obtains the second chroma signal of color bias improvement and the second brightness normalizing of corresponding second chroma signal
Change signal；
Second brightness normalized signal is converted to the second chrominance signal by drive module, is driven and is shown using the second chrominance signal
Panel；
The driving circuit of the backlight module includes:
Light source receiving module receives corresponding first chrominance signal of display panel, and it is corresponding to calculate backlight subarea all pixels
First chroma signal and the second chroma signal；
Light source computing module calculates separately the average signal and second of corresponding the first all chroma signal in backlight subarea
The average signal of chroma signal；
Light source adjusting module determines the minimum colour light source in the first colour light source, the second colour light source and third colour light source,
Minimum colour light source pair is obtained according to the average signal of the first chroma signal and the average signal of the second chroma signal
The minimum light source regulation coefficient answered；
Light source driver module is adjusted minimum colour light source to obtain the 4th brightness value, make using minimum light source regulation coefficient
Minimum colour light source is driven with the 4th brightness value.
10. a kind of display device, which is characterized in that including a kind of drive system of display module as claimed in claim 9 and
Display module；The display module includes display panel and backlight module.
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| US17/415,755 US11455962B2 (en) | 2019-04-08 | 2020-03-09 | Driving method and system of display assembly, and display device |
| PCT/CN2020/078391 WO2020207168A1 (en) | 2019-04-08 | 2020-03-09 | Method and system for driving display module, and display device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111583876A (en) * | 2020-05-29 | 2020-08-25 | 深圳市华星光电半导体显示技术有限公司 | Backlight module preparation method and device |
| WO2020207168A1 (en) * | 2019-04-08 | 2020-10-15 | 重庆惠科金渝光电科技有限公司 | Method and system for driving display module, and display device |
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