CN110010087A - A kind of driving method of display panel, drive system and display device - Google Patents
A kind of driving method of display panel, drive system and display device Download PDFInfo
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- CN110010087A CN110010087A CN201910275101.2A CN201910275101A CN110010087A CN 110010087 A CN110010087 A CN 110010087A CN 201910275101 A CN201910275101 A CN 201910275101A CN 110010087 A CN110010087 A CN 110010087A
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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
- G09G3/3413—Details of control of colour illumination sources
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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
- G09G3/3607—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
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- 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
- G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
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- Crystallography & Structural Chemistry (AREA)
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Abstract
This application discloses a kind of driving method of display panel, drive system and display devices, comprising steps of receiving the first chrominance signal, first chrominance signal is converted into the first brightness normalized signal, the first tone color saturation brightness space signal is converted to according to the first brightness normalized signal；The chroma signal for obtaining the first tone color saturation brightness space signal, is turned up the color saturation value of chroma signal, obtains the second chroma signal, to obtain the second tone color saturation brightness space signal；The minimum value in the first brightness normalized signal is turned down according to the second tone color saturation brightness space signal, to obtain the second brightness normalized signal；The second chrominance signal is converted to according to the second brightness normalized signal；Display panel is driven using the second chrominance signal.The application can effectively improve colour cast problem.
Description
Technical field
This application involves field of display technology more particularly to a kind of driving methods of display panel, 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.
Large scale liquid crystal display panel use mostly VA (Vertical Alignment, vertical orientation) liquid crystal technology or
IPS (In-Plane switching, plane conversion) liquid crystal technology, VA type liquid crystal technology compared to IPS liquid crystal technology exist compared with
High production efficiency and low manufacturing cost obtain advantage, but obtain optics there are more apparent compared to IPS liquid crystal technology in optical property
Property defect；There is colour cast under big visual angle in i.e. some large scale display panels, especially VA type liquid crystal drive.
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 panel, effectively changes
The case where being apt to display panel colour cast.
This application discloses a kind of driving methods of display panel, comprising steps of
The first chrominance signal is received, the first chrominance signal is converted into the first brightness normalized signal, according to the first brightness
Normalized signal is converted to the first tone color saturation brightness space signal；
The chroma signal for obtaining the first tone color saturation brightness space signal, the color that chroma signal is turned up are full
And angle value, the second chroma signal is obtained, to obtain the second tone color saturation brightness space signal；
The minimum value in the first brightness normalized signal is turned down according to the second tone color saturation brightness space signal, with
To the second brightness normalized signal；
The second chrominance signal is converted to according to the second brightness normalized signal；
Display panel is driven using the second chrominance signal.
Optionally, the chroma signal for obtaining the first tone color saturation brightness space signal, is turned up colour saturation
The color saturation value for spending signal, obtains the second chroma signal to obtain the step of the second tone color saturation brightness space signal
It suddenly include: that regulation coefficient is obtained according to the tone of the first tone color saturation brightness space signal；Color is adjusted according to regulation coefficient
The color saturation value of saturation signal s obtains the second chroma signal s '；The regulation coefficient meets following formula: S'=a
×S4+b×S3+c×S2+d×S+e；Wherein, s is chroma signal, and s ' is the second chroma signal；A, b, c, the d,
E is constant.
Optionally, the first chrominance signal is converted into the first brightness normalized signal, root by the first chrominance signal of the reception
The step of being converted to the first tone color saturation brightness space signal according to the first brightness normalized signal includes: by the first color
Signal input is grayscale digital signal；First brightness normalized signal r, g, b is converted to according to grayscale digital signal；Wherein r
=(R/255) ^ γ r, g=(G/255) ^ γ g, b=(B/255) ^ γ b, wherein γ r, γ g, γ b are gamma signal；By first
Brightness normalized signal r, g, b are converted into tone h and the formula of 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.
Optionally, described to be turned down in the first brightness normalized signal according to the second tone color saturation brightness space signal
Minimum value includes: the first red luma to include: the first brightness normalized signal the step of obtaining the second brightness normalized signal
Normalized signal r, the first Green brightness normalized signal g and the first blue luminences normalized signal b；Second brightness normalization letter
It number include: the second red luma normalized signal r ', the second Green brightness normalized signal g ' and the normalization of the second blue luminences
Signal b '；According to the tone of the second tone color saturation brightness space signal, the first red luma normalized signal r, the are obtained
Minimum value min in one Green brightness normalized signal g and the first blue luminences normalized signal b；According to chroma signal s
With the second chroma signal s ', the first red luma normalized signal r, the first Green brightness normalized signal g and are turned down
Minimum value min in one blue luminences normalized signal b, the minimum value min ' after being adjusted, to obtain the second red luma
Normalized signal r ', the first Green brightness normalized signal g ' and the first blue luminences normalized signal b '.
Optionally, the tone according to the second tone color saturation brightness space signal obtains the first brightness normalization
The step of minimum value min of signal includes: the max r when mass-tone is adjusted to red；Determine that green and blue are corresponding first bright
Spend the minimum value that smaller value in normalized signal g and b is the first brightness normalized signal；When mass-tone is adjusted to green, max g；
Determine that smaller value is the minimum of the first brightness normalized signal in red and blue corresponding first brightness normalized signal r and g
Value；When mass-tone is adjusted to blue, max b；Determine smaller value in red and green corresponding first brightness normalized signal r and g
For the minimum value of the first brightness normalized signal.
Optionally, described the step of being converted to the second chrominance signal according to the second brightness normalized signal includes: basis
Second brightness normalized signal is converted to the second chrominance signal: R '=255 × (r ') by following calculation formula1/γr, G '=
255×(g’)1/γg, B '=255 × (b ')1/γb；Wherein, r ', g ' and b ' be the second brightness normalized signal；R ', G ', B ' is the
Two chrominance signals.
Optionally, the color saturation value that chroma signal s is adjusted according to regulation coefficient, obtains the second color saturation
In the step of signal s ': the color difference Δ uv of chroma signal and the second chroma signal meets following formula:Wherein, u_1 and v_1 is the chromaticity coordinate of chroma signal,
The u_2 and v_2 is the chromaticity coordinate of the second chroma signal.
Optionally, described the step of regulation coefficient is obtained according to the tone of the first tone color saturation brightness space signal:
Tone H is divided for m tone section；Regulation coefficient a (H (m)), (H (m)), c (H are obtained according to tone section
(m)),d(H(m)),e(H(m))；Wherein, the more serious regulation coefficient of colour cast is bigger；The chroma signal s and tone zone
Between corresponding second chroma signal S ' (H (m), S) meet 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.
Disclosed herein as well is a kind of drive system of display panel, the driving method using above-mentioned display panel includes
Receiving module, adjustment module, computing module, conversion module and drive module；The receiving module receives the first chrominance signal, will
First chrominance signal is converted into the first brightness normalized signal, is converted to the first tone color according to the first brightness normalized signal
Saturation degree brightness space signal；The adjustment module obtains the color saturation letter of the first tone color saturation brightness space signal
Number, the color saturation value of chroma signal is turned up, obtains the second chroma signal, it is bright to obtain the second tone color saturation
Spend spacing wave；The computing module turns down the first brightness normalized signal according to the second tone color saturation brightness space signal
In minimum value, to obtain the second brightness normalized signal；The conversion module is converted according to the second brightness normalized signal
To the second chrominance signal；The drive module drives display panel using the second chrominance signal.
Disclosed herein as well is a kind of display devices, drive system and the drive system including above-mentioned display panel
The display panel of driving.
Under RGB colorimetric system, since the ingredient of the colour mixture other than dominant hue is more, so that colour cast is more serious；The application is logical
The minimum value turned down in the first brightness normalized signal is crossed, to reduce the ratio of colour mixture, to achieve the purpose that improve color saturation；
The purity that dominant hue so can be improved, can so weaken the colour cast problem of display panel, while making the color of display panel
Not the case where more gorgeous, this programme does not sacrifice the aperture opening ratio of display panel, and effectively avoiding the light transmittance of display panel reduces
Occur.
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 various representativeness colour systems and front viewing angle colour cast change schematic diagram in liquid crystal display panel；
Fig. 2 is the first contrast schematic diagram that do not distinguish primary and secondary pixel and distinguish primary and secondary pixel；
Fig. 3 is the second contrast schematic diagram that do not distinguish primary and secondary pixel and distinguish primary and secondary pixel；
Fig. 4 is a kind of schematic diagram of display device of the embodiment of the application；
Fig. 5 is a kind of schematic diagram of the drive system of display surface of the embodiment of the application
Fig. 6 is a kind of flow chart of the driving method of display panel of the embodiment of the application；
Fig. 7 is the chroma signal of the embodiment of the application and the schematic diagram of the second chroma signal variation；
Fig. 8 is the chroma signal of another embodiment of the application and the schematic diagram of the second chroma signal variation；
Fig. 9 is the variation signal of the chroma signal of the embodiment of the application and the color difference of the second chroma signal
Figure；
Figure 10 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；
Figure 11 is a kind of tone expression schematic diagram of the embodiment of the application.
Wherein, 100, display device；200, drive system；300, display panel；210, receiving module；220, mould is adjusted
Block；230, computing module；240, conversion module；250, drive 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.
Below with reference to the accompanying drawings it elaborates with optional embodiment to the application.
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
It produces efficiency and low manufacturing cost obtains advantage, but there are more apparent that optical property lacks compared to IPS liquid crystal technology in optical property
It falls into, 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.
As shown in figure 4, the embodiment as the application, discloses a kind of display device 100, the drive including display panel
Dynamic system 200 and display panel 300.
As shown in figure 5, the embodiment as the application, the drive system 200 for disclosing a kind of display panel includes connecing
Receive module 210, adjustment module 220, computing module 230, conversion module 240 and drive module 250；The receiving module 210 connects
The first chrominance signal is received, the first chrominance signal is converted into the first brightness normalized signal, according to the first brightness normalized signal
It is converted to the first tone color saturation brightness space signal；The adjustment module 220 obtains the first tone color saturation brightness
The color saturation value of chroma signal is turned up in the chroma signal of spacing wave, obtains the second chroma signal, to obtain
Obtain the second tone color saturation brightness space signal；The computing module 230 is believed according to the second tone color saturation brightness space
The minimum value in the first brightness normalized signal number is turned down, to obtain the second brightness normalized signal；The conversion module 240
The second chrominance signal is converted to according to the second brightness normalized signal；The drive module 250 is driven using the second chrominance signal
Display panel 300.
Corresponding, Fig. 6 is a kind of flow chart of the driving method of display panel of the application, as shown in fig. 6, the application is public
A kind of driving method of display panel has been opened, comprising steps of
S1: receiving the first chrominance signal, the first chrominance signal be converted into the first brightness normalized signal, bright according to first
Degree normalized signal is converted to first brightness of tone color saturation (HSV, Hue, saturation, Value) spacing wave；
S2: the chroma signal of the first tone color saturation brightness space signal is obtained, chroma signal is turned up
Color saturation value obtains the second chroma signal, to obtain the second tone color saturation brightness space signal；
S3: turning down the minimum value in the first brightness normalized signal according to the second tone color saturation brightness space signal,
To obtain the second brightness normalized signal；
S4: the second chrominance signal is converted to according to the second brightness normalized signal；
S5: display panel is driven using the second chrominance signal.
Under RGB colorimetric system, since the ingredient of the colour mixture other than dominant hue is more, so that colour cast is more serious；The application is logical
The minimum value turned down in the first brightness normalized signal is crossed, to reduce the ratio of colour mixture, to achieve the purpose that improve color saturation；
The purity that dominant hue so can be improved, weakens the colour cast problem of display panel, while keeping the color of display panel more gorgeous,
Not the case where this programme does not sacrifice the aperture opening ratio of display panel, and effectively avoiding the light transmittance of display panel reduces.Specifically
, by taking red as an example, when the close red solid color shade of tone, there are the colour casts that visual angle watches to deteriorate more obvious, Ke Yitou
The brightness normalized signal for reducing the smallest color of brightness normalized signal in red solid color shade is crossed, realizes and promotes red pure color
The purpose of the color saturation of dominant hue in tone reduces using red as other colors (green and blue) in the tone of dominant hue
Colour mixture, allow big visual angle light leakage color to face and be addressed with the problem of side view colour cast, wherein first close to just seeing self-tone
Chrominance signal can be red green blue tricolor signal.Specific second chrominance signal can be the second red green blue tricolor signal.
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 color all light leakages, and such three primary colors light leakage color mixing would not generate color, that is, positive side view
Light leakage color is muted color.
Fig. 7 is the curve graph that change to the second chroma signal of chroma signal, as shown in fig. 7, the acquisition the
The chroma signal of toning saturation degree brightness space signal of the same colour, is turned up the color saturation value of chroma signal, obtains the
Two chroma signals include: full according to the first tone color with the step S2 for obtaining the second tone color saturation brightness space signal
Regulation coefficient is obtained with the tone of degree brightness space signal；The color saturation value of chroma signal s is adjusted according to regulation coefficient,
Obtain the second chroma signal s '；The regulation coefficient meets following formula:
S'=a × S4+b×S3+c×S2+d×S+e；Wherein, s is chroma signal, and s ' is the second color saturation letter
Number；The a, b, c, d, e are constant.The second chroma signal s ' is obtained by calculation, is driven according to the second chroma signal
Dynamic display panel, so that the color of display panel is more bright-coloured, and colour cast problem is effectively improved.
As shown in figure 8, the step for obtaining regulation coefficient according to the tone of the first tone color saturation brightness space signal
It suddenly include: to divide tone H for m tone section；Regulation coefficient a (H (m)), b (H (m)), c (H are obtained according to tone section
(m)),d(H(m)),e(H(m))；Wherein, the more serious regulation coefficient of colour cast is bigger；The chroma signal s and tone zone
Between corresponding second chroma signal S ' (H (m), S) meet 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.After tone (H) is divided into multiple sections, because of different sections, colour cast degree is different, so according to different sections pair
Color saturation uses different adjustment, and while the colour vividness of display panel can be made to be promoted, the adjustment of colour cast is more
Uniformly.
Fig. 9 is the current chroma signal of the embodiment of the present application and the chromatic aberration curve of the second chroma signal
Figure；Wherein, the chromatic aberration figure of the Fig. 9, in the case of can be positive visual angle.It is of course also possible in the case of being side view angle.Figure
10 be the embodiment of the present application chroma signal and the second chroma signal different colours color difference variation schematic diagram；
After color saturation adjustment, the variation of color difference is as shown in Figure 10, and color difference problem is improved.
With reference to Figure 11, according to CIE (Commission Internationale de L'Ec-lairage, international lighting committee
Member's meeting) HSV definition, tone (H) represents different form and aspect colors by 0 °~360 °, wherein 0 ° of definition is red, 120 ° are green,
240 ° are blue.The first chrominance signal of the reception, is converted into the first brightness normalized signal for the first chrominance signal, according to
The step S1 that one brightness normalized signal is converted to the first tone color saturation brightness space signal includes: to believe the first color
Number input be grayscale digital signal；First brightness normalized signal r, g, b is converted to according to grayscale digital signal；Wherein r=(R/
255) ^ γ r, g=(G/255) ^ γ g, b=(B/255) ^ γ b, wherein γ r, γ g, γ b are gamma signal；First brightness is returned
One change signal r, g, b is converted into tone h and the formula of 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.Color saturation value is bright with first
It is related to spend normalized signal, when promoting chroma signal, corresponding first brightness normalized signal can also change, especially
, when the minimum value by turning down the first brightness normalized signal is to improve color saturation value, then correspondence will be other than dominant hue
Colour mixture ingredient turned down, to obtain the higher first tone color saturation brightness space signal of excitation purity.
It is described that minimum value in first brightness normalized signal is turned down according to the second tone color saturation brightness space signal,
It include: the first red luma normalizing so as to obtain the step S3 of the second brightness normalized signal include: the first brightness normalized signal
Change signal r, the first Green brightness normalized signal g and the first blue luminences normalized signal b；Second brightness normalized signal packet
It includes: the second red luma normalized signal r ', the second Green brightness normalized signal g ' and the second blue luminences normalized signal
b'；According to the tone of the second tone color saturation brightness space signal, the first red luma normalized signal r, first green is obtained
Minimum value min in colour brightness normalized signal g and the first blue luminences normalized signal b；According to chroma signal s and
Two chroma signal s ' turn down the first red luma normalized signal r, the first Green brightness normalized signal g and the first indigo plant
Minimum value min in colour brightness normalized signal b, the minimum value min ' after being adjusted, to obtain the second red luma normalizing
Change signal r ', the second Green brightness normalized signal g ' and the first blue luminences normalized signal b '.
The tone according to the second tone color saturation brightness space signal obtains the first brightness normalized signal most
The step of small value includes: the max r when mass-tone is adjusted to red；Determine the corresponding first brightness normalized signal of green and blue
Smaller value is the minimum value of the first brightness normalized signal in g and b；When mass-tone is adjusted to green, max g；It determines red and blue
Smaller value is the minimum value of the first brightness normalized signal in the corresponding first brightness normalized signal r and g of color；When mass-tone is adjusted to
When blue, max b；Determine that smaller value is that the first brightness is returned in red and green corresponding first brightness normalized signal r and g
One changes the minimum value of signal.Specifically, for example, when mass-tone is adjusted to blue, then can be determined that r, the max in g, b is b, because
Without extra computation max, and only need to calculate the smaller value of r and g as min, thus in the feelings for reducing calculation amount
Under condition, min is turned down to reduce the ingredient of colour mixture, so that reducing display panel faces colour cast with side view；There are parts for B tone
G, the light leak amount of R color component, the big visual angle of G, R composition is more obvious compared to positive visual angle, so that the B dominant hue after colour mixture generates
Colour cast.This programme reduces influence of big visual angle G, R light leakage for dominant hue B, reduces visual angle color by reducing G, R color component
Partially, while B dominant hue excitation purity being allowed to be promoted, improves colour vividness；Other colors are similarly.
Pass through s '=1-min/max, when green is dominant hue, the first brightness normalized signal max of maximum is first green
Colour brightness normalized signal g reduces minimum first brightness normalization while increasing the first Green brightness normalized signal g
Signal min.So adjustment can make the amplitude of the first brightness normalized signal min of minimum reduction less, and avoid reducing
When the first brightness normalized signal min of minimum, the normalization brightness being likely to result in is unbalance.
The step S4 for being converted to the second chrominance signal according to the second brightness normalized signal includes: according to following
Second brightness normalized signal is converted to the second chrominance signal: R '=255 × (r ') by calculation formula1/γr, G '=255 ×
(g’)1/γg, B '=255 × (b ')1/γb；Wherein, r ', g ' and b ' be the second brightness normalized signal；R ', G ', B ' is the second color
Multimedia message number.According to the second brightness normalized signal r ', g ', b ' and reversely extrapolate the second chrominance signal R ', G ', B ', the second color
Multimedia message number realizes the purpose for reducing and facing the difference inclined with side view color, effectively improves colour cast, while promoting display surface
The colour vividness of plate.
The color saturation value that chroma signal s is adjusted according to regulation coefficient, obtains the second chroma signal s '
The step of in: the color difference Δ uv of chroma signal and the second chroma signal meets following formula:Wherein, u_1 and v_1 is the chromaticity coordinate of chroma signal,
The u_2 and v_2 is the chromaticity coordinate of the second chroma signal.According to the calculating of formula, determines the variation range of purity, avoid
It is excessive to the amplitude of saturation degree adjustment, and the problem of cause other, it, will be to saturation degree tune while being effectively improved colour cast problem
Whole amplitude control is within the scope of controllable.
As shown in Figure 1, it is significantly less than red color tone and blue cast close to the colour cast of the tricolor signal of green solid color shade
Colour cast, therefore:
Under the premise of same color saturation value, when mass-tone is adjusted to green, red corresponding with blue first is bright
The reduction degree for spending minimum value in normalized signal g and b is larger；When mass-tone is adjusted to red or blue, if first
The minimum value min of brightness normalized signal it is corresponding for green when, the minimum value of the first brightness normalized signal reduce degree compared with
It is small.
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 panel, which is characterized in that comprising steps of
The first chrominance signal is received, the first chrominance signal is converted into the first brightness normalized signal, according to the first brightness normalizing
Change signal and is converted to the first tone color saturation brightness space signal；
The chroma signal for obtaining the first tone color saturation brightness space signal, is turned up the color saturation of chroma signal
Value, obtains the second chroma signal, to obtain the second tone color saturation brightness space signal；
The minimum value in the first brightness normalized signal is turned down according to the second tone color saturation brightness space signal, to obtain
Two brightness normalized signals；
The second chrominance signal is converted to according to the second brightness normalized signal；And
Display panel is driven using the second chrominance signal.
2. a kind of driving method of display panel as described in claim 1, which is characterized in that the first tone color of the acquisition is full
With the chroma signal of degree brightness space signal, the color saturation value of chroma signal is turned up, obtains the second color saturation
Signal, with obtain the second tone color saturation brightness space signal the step of include:
Regulation coefficient is obtained according to the tone of the first tone color saturation brightness space signal；
The color saturation value that chroma signal s is adjusted according to regulation coefficient, obtains the second chroma signal s '；
The regulation coefficient meets following formula:
S'=a × S4+b×S3+c×S2+d×S+e；
Wherein, s is chroma signal, and s ' is the second chroma signal；The a, b, c, d, e are constant.
3. a kind of driving method of display panel as described in claim 1, which is characterized in that the first color of reception letter
Number, the first chrominance signal is converted into the first brightness normalized signal, is converted to first according to the first brightness normalized signal
The step of tone color saturation brightness space signal includes:
First chrominance signal is inputted as grayscale digital signal；
First brightness normalized signal r, g, b is converted to according to grayscale digital signal；
Wherein r=(R/255) ^ γ r, g=(G/255) ^ γ g, b=(B/255) ^ γ b, wherein γ r, γ g, γ b are gamma letter
Number；
The formula that first brightness normalized signal r, g, b is 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.
4. a kind of driving method of display panel as claimed in claim 3, which is characterized in that described full according to the second tone color
The minimum value in the first brightness normalized signal is turned down with degree brightness space signal, to obtain the step of the second brightness normalized signal
Suddenly include:
First brightness normalized signal include: the first red luma normalized signal r, the first Green brightness normalized signal g and
First blue luminences normalized signal b；Second brightness normalized signal includes: the second red luma normalized signal r ', and second
Green brightness normalized signal g ' and the second blue luminences normalized signal b '；
According to the tone of the second tone color saturation brightness space signal, the first red luma normalized signal r, first green is obtained
Minimum value min in colour brightness normalized signal g and the first blue luminences normalized signal b；
According to chroma signal s and the second chroma signal s ', the first red luma normalized signal r, first green is turned down
Minimum value min in colour brightness normalized signal g and the first blue luminences normalized signal b, the minimum value after being adjusted
Min ', to obtain the second red luma normalized signal r ', the first Green brightness normalized signal g ' and the first blue luminences are returned
One changes signal b '.
5. a kind of driving method of display panel as claimed in claim 4, which is characterized in that described full according to the second tone color
With degree brightness space signal tone, obtain the first brightness normalized signal minimum value min the step of include:
When mass-tone is adjusted to red, max r；
Determine that smaller value is the first brightness normalized signal in the corresponding first brightness normalized signal g and b of green and blue
Minimum value；
When mass-tone is adjusted to green, max g；
Determine that smaller value is the first brightness normalized signal in red and blue corresponding first brightness normalized signal r and g
Minimum value；
When mass-tone is adjusted to blue, max b；
Determine that smaller value is the first brightness normalized signal in red and green corresponding first brightness normalized signal r and g
Minimum value.
6. a kind of driving method of display panel as claimed in claim 4, which is characterized in that
Described the step of being converted to the second chrominance signal according to the second brightness normalized signal includes:
According to following calculation formula, the second brightness normalized signal is converted to the second chrominance signal:
R '=255 × (r ')1/γr, G '=255 × (g ')1/γg, B '=255 × (b ')1/γb；
Wherein, r ', g ' and b ' be the second brightness normalized signal；R ', G ', B ' is the second chrominance signal.
7. a kind of driving method of display panel as claimed in claim 2, which is characterized in that described to be adjusted according to regulation coefficient
The color saturation value of chroma signal s, in the step of obtaining the second chroma signal s ':
The color difference Δ uv of chroma signal and the second chroma signal meets following formula:
Wherein, u_1 and v_1 is that the coloration of chroma signal is sat
Mark, the u_2 and v_2 are the chromaticity coordinates of the second chroma signal.
8. a kind of driving method of display panel as claimed in claim 2, which is characterized in that described full according to the first tone color
The step of obtaining regulation coefficient with the tone of degree brightness space signal:
Tone H is divided for m tone section；
Regulation coefficient a (H (m)), b (H (m)), c (H (m)), d (H (m)), e (H (m)) are obtained according to tone section；
Wherein, the more serious regulation coefficient of colour cast is bigger；
Corresponding second chroma signal of the chroma signal s and tone section
S ' (H (m), S) 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 constant to saturation degree.
9. a kind of drive system of display panel uses a kind of drive of display panel as described in claim 1 to 8 any one
Dynamic method characterized by comprising
Receiving module receives the first chrominance signal, the first chrominance signal is converted into the first brightness normalized signal, according to first
Brightness normalized signal is converted to the first tone color saturation brightness space signal；
Module is adjusted, the chroma signal of the first tone color saturation brightness space signal is obtained, chroma signal is turned up
Color saturation value, the second chroma signal is obtained, to obtain the second tone color saturation brightness space signal；
Computing module turns down the minimum in the first brightness normalized signal according to the second tone color saturation brightness space signal
Value, to obtain the second brightness normalized signal；
Conversion module is converted to the second chrominance signal according to the second brightness normalized signal；And
Drive module drives display panel using the second chrominance signal.
10. a kind of display device, which is characterized in that including a kind of drive system of display panel as claimed in claim 9 and
The display panel of the drive system driving.
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| CN113077742A (en) * | 2021-03-17 | 2021-07-06 | Tcl华星光电技术有限公司 | Adjusting method and adjusting device of display panel and display panel |
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