CN110111744A - 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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- CN110111744A CN110111744A CN201910275200.0A CN201910275200A CN110111744A CN 110111744 A CN110111744 A CN 110111744A CN 201910275200 A CN201910275200 A CN 201910275200A CN 110111744 A CN110111744 A CN 110111744A
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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
- G09G3/36—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
- G09G2320/06—Adjustment of display parameters
- G09G2320/0613—The adjustment depending on the type of the information to be displayed
- G09G2320/062—Adjustment of illumination source parameters
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: display panel includes the first colour light source, the second colour light source and third colour light source；The driving process of display panel includes: to be converted into the first tone color saturation brightness space signal after receiving the first chrominance signal；First chroma signal is adjusted to obtain the second chroma signal；Display panel is driven using the second chrominance signal that the second chroma signal is converted；The driving process of backlight module includes: to receive the first chrominance signal, obtains the first chroma signal and the second chroma signal and obtains light source regulation coefficient；It determines minimum colour light source, adjusts minimum colour light source using light source regulation coefficient and obtain the 4th brightness value；Minimum colour light source is driven using the 4th brightness value；Color purity is maintained while the application is the problem of 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.
Wherein, a kind of inventor use and undocumented scheme in, by the color saturation to signal be adjusted with
Improve colour cast problem, but so operate, effect can be presented 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 reducing color
Color purity performance is maintained while partially.
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 the first colour light source, the second colour light source and third color of light of multiple independent controls
Source；The corresponding light-source brightness of first colour light source is the first brightness value, the corresponding light-source brightness of second colour light source
For the second brightness value, 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 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；
Display panel is driven 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 win the first place chroma signal and the second color saturation letter
Number；
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
Chroma signal, the second chroma signal obtain the corresponding light source regulation coefficient of minimum colour light source；
Minimum colour light source is driven using the 4th brightness value.
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 obtained according to the first color saturation and the second chroma signal
Light source regulation coefficient adjusts light-source brightness to minimum colour light source, improves the tone to incur loss for color saturation,
It is aided with the intensity of light source adjusted, it might even be possible to so that color dot adjusted returns to former saturation color dot, reduce visual angle colour cast
While, maintain 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, conversion module；114, it drives
Dynamic model block；121, light source computing module；122, light source determining 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, together
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
And display module 200.
As shown in Fig. 5, Fig. 6 and Fig. 7, disclosed herein as well is a kind of drive system 100 of display module, following displays
The driving method of mould group, the drive system 100 applied to display module disclosed in the present application；The drive system of the display module
100 include: the driving circuit 110 of synchronously driven display panel and the driving circuit 120 of backlight module:
The backlight module includes the first colour light source, the second colour light source and third color of light of multiple independent controls
Source；The corresponding light-source brightness of first colour light source is the first brightness value, the corresponding light-source brightness of second colour light source
For the second brightness value, the corresponding light-source brightness of the third colour light source is third brightness value；
The driving circuit 110 of the display panel include receiving module 111, adjustment module 112, conversion module 113 and
Drive module 114；The receiving module 111 receives corresponding first chrominance signal of display panel, and the first chrominance signal is converted
For the first brightness normalized signal, the first tone color saturation brightness space signal is converted by the first brightness normalized signal；
The adjustment module 112 believes the first color saturation of the first tone color saturation brightness space signal by presetting regulation coefficient
It number is adjusted, obtains the second chroma signal；Second chroma signal is converted to the second color by the conversion module 113
Multimedia message number；The drive module 114 drives display panel using the second chrominance signal；
The driving circuit 120 of the backlight module includes light source computing module 121, light source determining module 122, light source adjustment
Module 123 and light source driver module 124；The light source computing module 121 receives corresponding first chrominance signal of display panel,
And win the first place chroma signal and the second chroma signal；The light source determining module 122 determines the first colour light source, the
Minimum colour light source in second colors light source and third colour light source is believed according to the first chroma signal, the second color saturation
Number obtain the corresponding light source regulation coefficient of minimum colour light source；The light source adjusting module 123 is using light source regulation coefficient to most
Small colour light source is adjusted to obtain the 4th brightness value；The light source driver module 124 is using the 4th brightness value to minimum color
Light source is driven.
As shown in Figure 8 and Figure 9, disclosed herein as well is a kind of driving method of display module, including it is synchronously driven aobvious
Show panel driving process and backlight module driving process:
The backlight module includes the first colour light source, the second colour light source and third color of light of multiple independent controls
Source；The corresponding light-source brightness of first colour light source is the first brightness value, the corresponding light-source brightness of second colour light source
For the second brightness value, 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
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；
S13: the second chroma signal is converted into the second chrominance signal；
S14: display panel is driven using the second chrominance signal；
The driving process of the backlight module comprising steps of
S21: corresponding first chrominance signal of display panel, and win the first place chroma signal and the second color saturation are received
Signal；
S22: determining the minimum colour light source in the first colour light source, the second colour light source and third colour light source, according to
First chroma signal, the second chroma signal obtain the corresponding light source regulation coefficient of minimum colour light source；
S23: minimum colour light source is adjusted using light source regulation coefficient to obtain the 4th brightness value；
S24: minimum colour light source is driven using the 4th brightness value.
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 obtained according to the first color saturation and the second chroma signal
Light source regulation coefficient adjusts light-source brightness to minimum colour light source, improves the tone to incur loss for color saturation,
It is aided with the intensity of light source adjusted, it might even be possible to so that color dot adjusted returns to former saturation color dot, reduce visual angle colour cast
While, color purity performance is maintained, wherein chrominance signal can be red green blue tricolor signal.Specific first color letter
Number can be the first red green blue tricolor signal, the second chrominance signal can be the second red green blue tricolor signal.
It is described to use default regulation coefficient to the first chroma signal of the first tone color saturation brightness space signal
The step of being adjusted, obtaining the second chroma signal include:
Second chroma signal S ' n_i, j are obtained by the first chroma signal Sn_i, j 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；
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.
Wherein, the minimum colour light source in first colour light source of determination, the second colour light source and third colour light source,
The step of obtaining minimum colour light source corresponding light source regulation coefficient according to the first chroma signal, the second chroma signal
Further include: determine time big colour light source and the minimum color in the first colour light source, the second colour light source and third colour light source
Light source；The corresponding light source regulation coefficient of minimum colour light source is obtained according to the first chroma signal, the second chroma signal
Light source regulation coefficient corresponding with secondary big colour light source；
It is described that minimum colour light source is adjusted to obtain the 4th brightness value using light source regulation coefficient；Use the 4th brightness
The step of value drives minimum colour light source includes: using the corresponding light source regulation coefficient of minimum colour light source to minimum face
Color light source is adjusted to obtain the 4th brightness value, and using time big corresponding light source regulation coefficient of colour light source to secondary big color of light
Source is adjusted to obtain the 5th brightness value；Minimum colour light source is driven using the 4th brightness value, and uses the 5th brightness
Value drives secondary big colour light source.
The application uses the 4th brightness value to drive minimum colour light source incessantly, while also big using the driving time of the 5th brightness value
Colour light source, so that minimum colour light source and secondary big colour light source can be realized and show that insufficient tone carries out by force to corresponding
Change, be returned to former saturation color dot, maintains the color purity of minimum colour light source tone corresponding with secondary colour light source greatly.
In addition, the minimum colour light source in first colour light source of determination, the second colour light source and third colour light source,
The step of obtaining minimum colour light source corresponding light source regulation coefficient according to the first chroma signal, the second chroma signal
Further include: determine maximum color light source in the first colour light source, the second colour light source and third colour light source, secondary big color of light
Source and minimum colour light source；It is corresponding according to the first chroma signal, the second chroma signal acquisition maximum color light source
Light source regulation coefficient, the corresponding light source regulation coefficient of secondary big colour light source light source regulation coefficient corresponding with minimum colour light source；
It is described that minimum colour light source is adjusted to obtain the 4th brightness value using light source regulation coefficient；Use the 4th brightness
The step of value drives minimum colour light source includes: using the corresponding light source regulation coefficient of minimum colour light source to minimum face
Color light source is adjusted to obtain the 4th brightness value；Using the corresponding light source regulation coefficient of secondary big colour light source to secondary big colour light source
It is adjusted to obtain the 5th brightness value；Maximum color light source is adjusted using maximum color light source corresponding light source regulation coefficient
It is whole to obtain the 6th brightness value；Minimum colour light source is driven using the 4th brightness value；Using the 5th brightness value to secondary great Yan
Color light source is driven；Maximum color light source is driven using the 6th brightness value.
Minimum colour light source is driven using the 4th brightness value, the 5th brightness value drives time big colour light source, while also using
6th brightness value drives maximum color light source, so that minimum colour light source, secondary big colour light source and maximum color light source can
It realizes and shows that insufficient tone is strengthened to corresponding, be returned to former saturation color dot, maintain minimum colour light source, secondary great Yan
The color purity of color light source and the corresponding tone of maximum color light source.
Minimum colour light source in first colour light source of determination, the second colour light source and third colour light source, according to
First chroma signal, the second chroma signal obtain the step of minimum colour light source corresponding light source regulation coefficient and wrap
It includes:
The corresponding first brightness normalized signal of the first chroma signal is obtained, calculates separately to obtain the first red luma
The average signal of normalized signal, the average signal of the first Green brightness normalized signal and the first blue luminences normalized signal
Average signal in the first peak signal, big signal and the first minimum signal for the first time:
The corresponding second brightness normalized signal of the second chroma signal is obtained, the corresponding institute in backlight subarea is calculated separately
Have to obtain the average value of the second red luma normalized signal, the average value of the second Green brightness normalized signal and the second blue
The second peak signal, second big signal and the second minimum signal in the average value of brightness normalized signal；
The corresponding first light source regulation coefficient of minimum colour light source is obtained according to the first minimum signal and the second minimum signal；
According to the second light source regulation coefficient corresponding with the second big big colour light source of signal acquisition time of big signal for the first time；
Wherein, the backlight module is direct-type backlight；
The direct-type backlight, which such as is divided at multiple backlight subareas, each backlight subarea, independent red light source, green
Light source and blue-light source；
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 includes the second red luma normalized signal, the second Green brightness normalization letter
Number and the second blue luminences normalized signal.
Pass through the first peak signal in the average signal to the corresponding red, green, blue tone of the first chroma signal,
Primary big signal and the first minimum signal and the second chroma signal after adjusting to the first chroma signal (by obtaining
The signal arrived) corresponding red, green, blue tone average signal in the second peak signal, second big signal and second minimum
The comparison of signal obtains first light source regulation coefficient and second light source regulation coefficient, realizes and adjusts to the specific aim of light source, so that
The amplitude that light source can accurately be declined according to the first minimum signal and first time big signal, and correspond to the strong of supplement light source
Degree still can achieve the purpose of balance to reach after to color saturation adjustment；By the auxiliary of light source, so that color dot
It may return to former saturation color dot, while reducing the colour cast of display panel, maintain color purity performance.
The first peak signal maxn_ave, for the first time big signal midn_ave, the first minimum signal minn_ave, the
The average signal rn_ave of one red luma normalized signal, the first Green brightness normalized signal average signal gn_ave and
The relationship of the average signal bn_ave of first 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 peak signal max ' n_ave, for the first time big signal mid ' n_ave, the first minimum signal min ' n_
Ave, the average signal r ' n_ave of the first red luma normalized signal, the first Green brightness normalized signal average signal
The relationship of the average signal b ' n_ave of 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 first peak signal maxn_ave of the application, for the first time big signal
Midn_ave, the first minimum signal minn_ave, the second peak signal max ' n_ave, for the first time big signal mid ' n_ave and the
One minimum signal min ' n_ave is to improve the accuracy that the application adjusts light source by being calculated.
Figure 10 is the schematic diagram of the straight-down negative display module of the embodiment of the application, as shown in Figure 10, backlight subarea pair
The the first red luma normalized signal answered be respectively as follows: rn_1,1, rn_1,2 ..., rn_i, j, backlight subarea are corresponding first green
Colour brightness normalized signal be respectively as follows: gn_1,1, gn_1,2 ..., gn_i, j, the corresponding first blue luminences normalizing in backlight subarea
Change signal be respectively as follows: bn_1,1, bn_1,2 ..., bn_i, j, the first red luma normalized signal average signal rn_ave,
The average signal bn_ of the average signal gn_ave of first Green brightness normalized signal and the first blue luminences normalized signal
The relationship of ave meets 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 g ' n_1,1, g ' n_1,2 ..., g ' n_i, j, backlight point
The corresponding second blue luminences normalized signal in area be respectively b ' n_1,1, b ' n_1,2 ..., b ' n_i, j, the second red luma return
The average signal r ' n_ave of one change signal, the blue of average signal g ' n_ave and second of the second Green brightness normalized signal are bright
The relationship for spending the average signal 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).
By the calculating of the red, green, blue brightness normalized signal to each adjustment front and back, show that first is red bright respectively
Spend the average signal of normalized signal, the average signal of the first Green brightness normalized signal, the first blue luminences normalization letter
Number average signal, the average signal of the second red luma normalized signal, the second Green brightness normalized signal average letter
Number and the second blue luminences normalized signal average signal, the calculation of this programme has been concerned about the bright of each pixel
The variation of normalized signal is spent, so that calculated structure is representative and accuracy, realizes the tune to light source precise and high efficiency
Section, so that the luminous intensity that shows of light source adjusted and anticipation is with higher mutually right.
In addition, for example when the tone that the first brightness normalized signal calculates meets: 0 < Hn_i, j < 30 are (i.e. based on red
Tone) when, big brightness normalized signal and the first minimum brightness normalized signal maintain for the first time, gn_i, j-bn_i, j=g '
The constant brightness difference of n_i, j-b ' n_i, j.
If first light source regulation coefficient is x, second light source regulation coefficient is y, then meets following formula: midn_ave=x
× mid ' n_ave, minn_ave=y × min ' n_ave.By the calculating of formula, signal intensity ratio is obtained, so as to right
That answers extrapolates the ratio of the required light source adjusted.In addition, the application can also be maximum according to the first peak signal and second
The corresponding third light source regulation coefficient of signal acquisition maximum color light source then meets: maxn_ if third light source regulation coefficient is z
Ave=x × max ' n_ave.
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 color saturation to the step of the second chroma signal S ' n_i, j
Signal Sn_i, j are 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；It is described
The corresponding second chroma signal S ' (H (m), S) of chroma signal s and tone section meets following formula:
S'(H (m), S)=a (H (m)) × S4+b(H(m))×S3+c(H(m))×S2+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 red green blue tricolor driving display panel, minimum color of light is driven using the 4th brightness value
Source drives time big colour light source 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.
In addition, in red solid color shade, red is dominant hue equally by taking red as an example；The application can also pass through tune
Minimum brightness normalized signal of the height in the brightness normalized signal of other colors in red solid color shade, to reduce
Using red as the color saturation of dominant hue；It can so make colour mixture close to white muted color, the colour cast of muted color can reach colour cast
Decline is primarily due to allow red green blue tricolor all light leakages, and such three primary colors light leakage color mixing would not generate color, also
Be positive side view light leakage color be muted color.
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 the first colour light source, the second colour light source and third colour light source of multiple independent controls；Institute
Stating the corresponding light-source brightness of the first colour light source is the first brightness value, and the corresponding light-source brightness of second colour light source is second
Brightness value, the corresponding light-source brightness of the third colour light source are 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；
Second chroma signal is converted into the second chrominance signal；
Display panel is driven using the second chrominance signal；
The driving process of the backlight module comprising steps of
Receive corresponding first chrominance signal of display panel, and win the first place chroma signal and the second chroma 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
Light source regulation coefficient corresponding with degree signal, the minimum colour light source of the second chroma signal acquisition；
Minimum colour light source is adjusted using light source regulation coefficient to obtain the 4th brightness value；Using the 4th brightness value to 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 to use default regulation coefficient
First chroma signal of the first tone color saturation brightness space signal is adjusted, the second chroma signal is obtained
The step of include:
Second chroma signal S ' n_i, j are obtained by the first chroma signal Sn_i, j 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, and are constant；
Described the step of second chroma signal is converted to the second chrominance signal includes: to convert the second chroma signal
The second tone color saturation brightness space signal is obtained, brightness normalizing is turned down according to the second tone color saturation brightness space signal
Change the minimum value in signal, to obtain the second brightness normalized signal；
The second chrominance signal is converted to according to the second brightness normalized signal.
3. a kind of driving method of display module as described in claims 1 or 2 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,
Second chroma signal obtains the step of minimum colour light source corresponding light source regulation coefficient further include:
Determine time big colour light source and the minimum color of light in the first colour light source, the second colour light source and third colour light source
Source；
According to the first chroma signal, the second chroma signal obtain the corresponding light source regulation coefficient of minimum colour light source and
The corresponding light source regulation coefficient of secondary big colour light source；
It is described that minimum colour light source is adjusted to obtain the 4th brightness value using light source regulation coefficient；Use the 4th brightness value pair
The step of minimum colour light source is driven include:
Minimum colour light source is adjusted to obtain the 4th brightness value using the corresponding light source regulation coefficient of minimum colour light source, and
Secondary big colour light source is adjusted to obtain the 5th brightness value using the corresponding light source regulation coefficient of secondary big colour light source；
Minimum colour light source is driven using the 4th brightness value, and secondary big colour light source is driven using the 5th brightness value
It is dynamic.
4. a kind of driving method of display module as described in claim 1, which is characterized in that
Minimum colour light source in first colour light source of determination, the second colour light source and third colour light source, according to first
Chroma signal, the second chroma signal obtain the step of minimum colour light source corresponding light source regulation coefficient further include:
Determine maximum color light source, the secondary big colour light source in the first colour light source, the second colour light source and third colour light source
With minimum colour light source；The corresponding light of maximum color light source is obtained according to the first chroma signal, the second chroma signal
Source regulation coefficient, the corresponding light source regulation coefficient of secondary big colour light source light source regulation coefficient corresponding with minimum colour light source；
It is described that minimum colour light source is adjusted to obtain the 4th brightness value using light source regulation coefficient；Use the 4th brightness value pair
The step of minimum colour light source is driven include:
Minimum colour light source is adjusted to obtain the 4th brightness value using the corresponding light source regulation coefficient of minimum colour light source；Make
Secondary big colour light source is adjusted to obtain the 5th brightness value with the corresponding light source regulation coefficient of secondary big colour light source；Use maximum
The corresponding light source regulation coefficient of colour light source is adjusted maximum color light source to obtain the 6th brightness value；
Minimum colour light source is driven using the 4th brightness value；Secondary big colour light source is driven using the 5th brightness value
It is dynamic；Maximum color light source is driven using the 6th brightness value.
5. a kind of driving method of display module as claimed in claim 3, which is characterized in that first color of light of determination
Minimum colour light source in source, the second colour light source and third colour light source, according to the first chroma signal, the second colour saturation
The step of degree signal acquisition minimum colour light source corresponding light source regulation coefficient includes:
The backlight module is direct-type backlight；
The direct-type backlight, which such as is divided at multiple backlight subareas, each backlight subarea, independent red light source, green light source
And blue-light source；
The first brightness normalized signal include the first red luma normalized signal, the first Green brightness normalized signal and
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
The corresponding first brightness normalized signal of the first chroma signal is obtained, calculates separately to obtain the first red luma normalizing
The average signal of change signal, the average signal of the first Green brightness normalized signal and the first blue luminences normalized signal are put down
The big signal of the first peak signal, first time and the first minimum signal in equal signal；
The corresponding second brightness normalized signal of the second chroma signal is obtained, calculates separately to obtain the corresponding institute in backlight subarea
There are the average value of the second red luma normalized signal, the average value and the second blue luminences of the second Green brightness normalized signal
The second peak signal, second big signal and the second minimum signal in the average value of normalized signal；
The corresponding first light source regulation coefficient of minimum colour light source is obtained according to the first minimum signal and the second minimum signal；
According to the second light source regulation coefficient corresponding with the second big big colour light source of signal acquisition time of big signal for the first time.
6. a kind of driving method of display module as claimed in claim 5, which is characterized in that first peak signal
Maxn_ave, for the first time big signal midn_ave, the first minimum signal minn_ave, the first red luma normalized signal it is flat
Equal signal rn_ave, the average signal gn_ave of the first Green brightness normalized signal and the first blue luminences normalized signal
The relationship of average signal bn_ave 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 peak signal max ' n_ave, for the first time big signal mid ' n_ave, the first minimum signal min ' n_ave, the
Average signal g ' the n_ave of the average signal r ' n_ave of one red luma normalized signal, the first Green brightness normalized signal
Meet following formula with the relationship of the average signal b ' n_ave of the first blue luminences normalized signal:
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).
7. a kind of driving method of display module as claimed in claim 6, 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；The average signal rn_ave of first red luma normalized signal, the first green are bright
The relationship for spending the average signal gn_ave of normalized signal and the average signal bn_ave of the first blue luminences normalized signal is full
The following formula of foot:
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 signal r ' n_ave of one change signal, the blue of average signal g ' n_ave and second of the second Green brightness normalized signal are bright
The relationship for spending the average signal 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).
8. a kind of driving method of display module as described in claim 6 or 7 any one, which is characterized in that set the first light
Source regulation coefficient is x, and second light source regulation coefficient is y, then meets following formula: midn_ave=x × mid ' n_ave, minn_
Ave=y × min ' n_ave.
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 the first colour light source, the second colour light source and third colour light source of multiple independent controls；Institute
Stating the corresponding light-source brightness of the first colour light source is the first brightness value, and the corresponding light-source brightness of second colour light source is second
Brightness value, the corresponding light-source brightness of the third colour light source are 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；
Second chroma signal is converted to the second chrominance signal by conversion module；And
Drive module drives display panel using the second chrominance signal；
The driving circuit of the backlight module includes:
Light source computing module receives corresponding first chrominance signal of display panel, and win the first place chroma signal and the second color
Saturation signal；
Light source determining module determines the minimum colour light source in the first colour light source, the second colour light source and third colour light source,
The corresponding light source regulation coefficient of minimum colour light source is obtained according to the first chroma signal, the second chroma signal；
Light source adjusting module is adjusted minimum colour light source using light source regulation coefficient to obtain the 4th brightness value；And
Light source driver module drives minimum colour light source using 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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